WorldWideScience

Sample records for electro-hydraulic scabbling ehs

  1. Concrete decontamination by Electro-Hydraulic Scabbling (EHS). Topical report

    International Nuclear Information System (INIS)

    1996-01-01

    Electro-Hydraulic Scabbling (EHS) technology and equipment for decontaminating concrete structures from radionuclides, organic substances, and hazardous metals is being developed by Textron Systems Division (TSD). This wet scabbling technique involves the generation of powerful shock waves and intense cavitation by a strong pulsed electric discharge in a water layer at the concrete surface. The high pressure impulse results in stresses which crack and peel off a concrete layer of a controllable thickness. Scabbling produces contaminated debris of relatively small volume which can be easily removed, leaving clean bulk concrete. This new technology is being developed under Contract No. DE-AC21-93MC30164. The project objective is to develop and demonstrate a cost-efficient, rapid, controllable process to remove the surface layer of contaminated concrete while generating minimal secondary waste. The primary target of this program is uranium-contaminated concrete floors which constitute a substantial part of the contaminated area at DOE weapon facilities

  2. Concrete decontamination by Electro-Hydraulic Scabbling (EHS)

    International Nuclear Information System (INIS)

    1994-11-01

    EHS is being developed for decontaminating concrete structures from radionuclides, organic substances, and hazardous metals. EHS involves the generation of powerful shock waves and intense cavitation by a strong pulsed electric discharge in a water layer at the concrete surface; high impulse pressure results in stresses which crack and peel off a concrete layer of controllable thickness. Scabbling produces contaminated debris of relatively small volume which can be easily removed, leaving clean bulk concrete. Objective of Phase I was to prove the technical feasibility of EH for controlled scabbling and decontamination of concrete. Phase I is complete

  3. Concrete decontamination by Electro-Hydraulic Scabbling (EHS)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-11-01

    EHS is being developed for decontaminating concrete structures from radionuclides, organic substances, and hazardous metals. EHS involves the generation of powerful shock waves and intense cavitation by a strong pulsed electric discharge in a water layer at the concrete surface; high impulse pressure results in stresses which crack and peel off a concrete layer of controllable thickness. Scabbling produces contaminated debris of relatively small volume which can be easily removed, leaving clean bulk concrete. Objective of Phase I was to prove the technical feasibility of EH for controlled scabbling and decontamination of concrete. Phase I is complete.

  4. Concrete decontamination by electro-hydraulic scabbling (EHS). Final report

    International Nuclear Information System (INIS)

    1997-10-01

    Contamination of concrete structures by radionuclides, hazardous metals and organic substances (including PCB's) occurs at many DOE sites. The contamination of concrete structures (walls, floors, ceilings, etc.) varies in type, concentration, and especially depth of penetration into the concrete. In many instances, only the surface layer of concrete is contaminated, up to a depth of one inch, according to estimates provided in the R and D ID document. Then, removal of the concrete surface layer (scabbling) is considered to be the most effective decontamination method. Textron Systems Corp. (TSC) has developed a scabbling concept based on electro-mechanical phenomena accompanying strong electric pulses generated by applying high voltage at the concrete/water interface. Depending on the conditions, the electric discharge may occur either through a waste layer or through the concrete body itself. This report describes the development, testing, and results of this electro-mechanical process. Phase 1 demonstrated the feasibility of the process for the controlled removal of a thin layer of contaminated concrete. Phase 2 designed, fabricated, and tested an integrated subscale unit. This was tested at Fernald. In Phase 3, the scabbling unit was reconfigured to increase its power and processing rate. Technology transfer to an engineering contracting company is continuing

  5. Concrete decontamination by electro-hydraulic scabbling (EHS). Final report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-10-01

    Contamination of concrete structures by radionuclides, hazardous metals and organic substances (including PCB`s) occurs at many DOE sites. The contamination of concrete structures (walls, floors, ceilings, etc.) varies in type, concentration, and especially depth of penetration into the concrete. In many instances, only the surface layer of concrete is contaminated, up to a depth of one inch, according to estimates provided in the R and D ID document. Then, removal of the concrete surface layer (scabbling) is considered to be the most effective decontamination method. Textron Systems Corp. (TSC) has developed a scabbling concept based on electro-mechanical phenomena accompanying strong electric pulses generated by applying high voltage at the concrete/water interface. Depending on the conditions, the electric discharge may occur either through a waste layer or through the concrete body itself. This report describes the development, testing, and results of this electro-mechanical process. Phase 1 demonstrated the feasibility of the process for the controlled removal of a thin layer of contaminated concrete. Phase 2 designed, fabricated, and tested an integrated subscale unit. This was tested at Fernald. In Phase 3, the scabbling unit was reconfigured to increase its power and processing rate. Technology transfer to an engineering contracting company is continuing.

  6. Concrete decontamination by electro-hydraulic scabbling

    International Nuclear Information System (INIS)

    Goldfarb, V.; Gannon, R.

    1995-01-01

    Textron Defense Systems (TDS) is developing an electro-hydraulic device that has the potential for faster, safer, and less expensive scabbling of contaminated concrete surfaces. In the device, shock waves and cavitating bubbles are produced in water by the electric pulses, and the direct and reflected shock waves impinging on the concrete surface result in the crushing and cracking of the concrete. Pulse energy, frequency, and traverse speed control the depth of the scabbling action. Performance thus far has demonstrated the capability of a prototype unit to process a swath 24 inches wide, up to 3/4 inches deep at a linear velocity of up to 6 feet per hour, i.e., at a scabbling rate of 12 sq. ft. per hour

  7. Concrete decontamination by electro-hydraulic scabbling

    Energy Technology Data Exchange (ETDEWEB)

    Goldfarb, V.; Gannon, R. [Textron Defense System, Everett, MA (United States)

    1995-10-01

    Textron Defense Systems (TDS) is developing an electro-hydraulic device that has the potential for faster, safer, and less expensive scabbling of contaminated concrete surfaces. In the device, shock waves and cavitating bubbles are produced in water by the electric pulses, and the direct and reflected shock waves impinging on the concrete surface result in the crushing and cracking of the concrete. Pulse energy, frequency, and traverse speed control the depth of the scabbling action. Performance thus far has demonstrated the capability of a prototype unit to process a swath 24 inches wide, up to 3/4 inch deep at a linear velocity of up to 6 feet per hour, i.e., at a scabbling rate of 12 sq. ft. per hour.

  8. Design and Performance Evaluation of an Electro-Hydraulic Camless Engine Valve Actuator for Future Vehicle Applications.

    Science.gov (United States)

    Nam, Kanghyun; Cho, Kwanghyun; Park, Sang-Shin; Choi, Seibum B

    2017-12-18

    This paper details the new design and dynamic simulation of an electro-hydraulic camless engine valve actuator (EH-CEVA) and experimental verification with lift position sensors. In general, camless engine technologies have been known for improving fuel efficiency, enhancing power output, and reducing emissions of internal combustion engines. Electro-hydraulic valve actuators are used to eliminate the camshaft of an existing internal combustion engines and used to control the valve timing and valve duration independently. This paper presents novel electro-hydraulic actuator design, dynamic simulations, and analysis based on design specifications required to satisfy the operation performances. An EH-CEVA has initially been designed and modeled by means of a powerful hydraulic simulation software, AMESim, which is useful for the dynamic simulations and analysis of hydraulic systems. Fundamental functions and performances of the EH-CEVA have been validated through comparisons with experimental results obtained in a prototype test bench.

  9. Highly reliable electro-hydraulic control system

    International Nuclear Information System (INIS)

    Mande, Morima; Hiyama, Hiroshi; Takahashi, Makoto

    1984-01-01

    The unscheduled shutdown of nuclear power stations disturbs power system, and exerts large influence on power generation cost due to the lowering of capacity ratio; therefore, high reliability is required for the control system of nuclear power stations. Toshiba Corp. has exerted effort to improve the reliability of the control system of power stations, and in this report, the electro-hydraulic control system for the turbines of nuclear power stations is described. The main functions of the electro-hydraulic control system are the control of main steam pressure with steam regulation valves and turbine bypass valves, the control of turbine speed and load, the prevention of turbine overspeed, the protection of turbines and so on. The system is composed of pressure sensors and a speed sensor, the control board containing the electronic circuits for control computation and protective sequence, the oil cylinders, servo valves and opening detectors of the valves for control, a high pressure oil hydraulic machine and piping, the operating panel and so on. The main features are the adoption of tripling intermediate value selection method, the multiplying of protection sensors and the adoption of 2 out of 3 trip logic, the multiplying of power sources, the improvement of the reliability of electronic circuit hardware and oil hydraulic system. (Kako, I.)

  10. Renal arteriovenous fistula: A rare complication of electro-hydraulic ...

    African Journals Online (AJOL)

    A 62-year-old man with type 1 Von Willebrand's disease was electively admitted to a Northern Ireland district general hospital for endoscopic management of a 1 cm right lower pole calculus. After pre-operative administration of appropriate haematological factors, flexible ureteroscopic electro-hydraulic lithotripsy (EHL).

  11. Research on intelligent algorithm of electro - hydraulic servo control system

    Science.gov (United States)

    Wang, Yannian; Zhao, Yuhui; Liu, Chengtao

    2017-09-01

    In order to adapt the nonlinear characteristics of the electro-hydraulic servo control system and the influence of complex interference in the industrial field, using a fuzzy PID switching learning algorithm is proposed and a fuzzy PID switching learning controller is designed and applied in the electro-hydraulic servo controller. The designed controller not only combines the advantages of the fuzzy control and PID control, but also introduces the learning algorithm into the switching function, which makes the learning of the three parameters in the switching function can avoid the instability of the system during the switching between the fuzzy control and PID control algorithms. It also makes the switch between these two control algorithm more smoother than that of the conventional fuzzy PID.

  12. Design of a Novel Electro-hydraulic Drive Downhole Tractor

    Science.gov (United States)

    Fang, Delei; Shang, Jianzhong; Yang, Junhong; Wang, Zhuo; Wu, Wei

    2018-02-01

    In order to improve the traction ability and the work efficiency of downhole tractor in oil field, a novel electro-hydraulic drive downhole tractor was designed. The tractor’s supporting mechanism and moving mechanism were analyzed based on the tractor mechanical structure. Through the introduction of hydraulic system, the hydraulic drive mechanism and the implementation process were researched. Based on software, analysis of tractor hydraulic drive characteristic and movement performance were simulated, which provide theoretical basis for the development of tractor prototype.

  13. Precision Force Control for an Electro-Hydraulic Press Machine

    Directory of Open Access Journals (Sweden)

    Hong-Ming Chen

    2014-08-01

    Full Text Available This thesis is primarily intended to design a PC-based control system to control the force of an electro-hydraulic servo press system for implementing precision force control. The main feature is to develop a composite control by using the relief valve and the flow servo valve. Using feedback from a force sensor, a fuzzy controller was designed with LabVIEW software as the system control core for achieving a precision force control for the hydraulic cylinder on its travel and output. The weakness of hydraulic systems is that hydraulic oil is compressible and prone to leaking, and its characteristics can vary with oil temperature, thus making it difficult for a general linear controller to achieve accurate control. Therefore, a fuzzy controller was designed with LabVIEW along with a NI-PCI_6221 interface card and a load cell to control the servo valve flow and the relief valve to control the pressure source. The testing results indicate that accurate force control output of an electro-hydraulic servo press system can be obtained.

  14. Robust Hinfinity position control synthesis of an electro-hydraulic servo system.

    Science.gov (United States)

    Milić, Vladimir; Situm, Zeljko; Essert, Mario

    2010-10-01

    This paper focuses on the use of the techniques based on linear matrix inequalities for robust H(infinity) position control synthesis of an electro-hydraulic servo system. A nonlinear dynamic model of the hydraulic cylindrical actuator with a proportional valve has been developed. For the purpose of the feedback control an uncertain linearized mathematical model of the system has been derived. The structured (parametric) perturbations in the electro-hydraulic coefficients are taken into account. H(infinity) controller extended with an integral action is proposed. To estimate internal states of the electro-hydraulic servo system an observer is designed. Developed control algorithms have been tested experimentally in the laboratory model of an electro-hydraulic servo system. Copyright © 2010 ISA. Published by Elsevier Ltd. All rights reserved.

  15. Knowledge-based Adaptive Tracking Control of Electro-hydraulic Actuator Systems

    DEFF Research Database (Denmark)

    Hansen, Poul Erik

    1997-01-01

    The paper deal with intelligent motion control and electro-hydraulic actuator systems for multiaxis machynes and robots.The research results are from the IMCIA research Programme supported by the Danish Technical Research Council, STVF.......The paper deal with intelligent motion control and electro-hydraulic actuator systems for multiaxis machynes and robots.The research results are from the IMCIA research Programme supported by the Danish Technical Research Council, STVF....

  16. Modeling and stability of electro-hydraulic servo of hydraulic excavator

    Science.gov (United States)

    Jia, Wenhua; Yin, Chenbo; Li, Guo; Sun, Menghui

    2017-11-01

    The condition of the hydraulic excavator is complicated and the working environment is bad. The safety and stability of the control system is influenced by the external factors. This paper selects hydraulic excavator electro-hydraulic servo system as the research object. A mathematical model and simulation model using AMESIM of servo system is established. Then the pressure and flow characteristics are analyzed. The design and optimization of electro-hydraulic servo system and its application in engineering machinery is provided.

  17. An electro-hydraulic servo control system research for CFETR blanket RH

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Changqi [Hefei University of Technology, Hefei 230009, Anhui (China); Tang, Hongjun, E-mail: taurustang@126.com [Hefei University of Technology, Hefei 230009, Anhui (China); Qi, Songsong [Hefei University of Technology, Hefei 230009, Anhui (China); Cheng, Yong; Feng, Hansheng; Peng, Xuebing; Song, Yuntao [Institute of Plasma Physics Chinese Academy of Sciences, Hefei 230031, Anhui (China)

    2014-11-15

    Highlights: • We discussed the conceptual design of CFETR blanket RH maintenance system. • The mathematical model of electro-hydraulic servo system was calculated. • A fuzzy adaptive PD controller was designed based on control theory and experience. • The co-simulation models of the system were established with AMESim/Simulink. • The fuzzy adaptive PD algorithm was designed as the core strategy of the system. - Abstract: Based on the technical design requirements of China Fusion Engineering Test Reactor (CFETR) blanket remote handling (RH) maintenance, this paper focus on the control method of achieving high synchronization accuracy of electro-hydraulic servo system. Based on fuzzy control theory and practical experience, a fuzzy adaptive proportional-derivative (PD) controller was designed. Then a more precise co-simulation model was established with AMESim/Simulink. Through the analysis of simulation results, a fuzzy adaptive PD control algorithm was designed as the core strategy of electro-hydraulic servo control system.

  18. Research Based on AMESim of Electro-hydraulic Servo Loading System

    Science.gov (United States)

    Li, Jinlong; Hu, Zhiyong

    2017-09-01

    Electro-hydraulic servo loading system is a subject studied by many scholars in the field of simulation and control at home and abroad. The electro-hydraulic servo loading system is a loading device simulation of stress objects by aerodynamic moment and other force in the process of movement, its function is all kinds of gas in the lab condition to analyze stress under dynamic load of objects. The purpose of this paper is the design of AMESim electro-hydraulic servo system, PID control technology is used to configure the parameters of the control system, complete the loading process under different conditions, the optimal design parameters, optimization of dynamic performance of the loading system.

  19. An electro-hydraulic servo control system research for CFETR blanket RH

    International Nuclear Information System (INIS)

    Chen, Changqi; Tang, Hongjun; Qi, Songsong; Cheng, Yong; Feng, Hansheng; Peng, Xuebing; Song, Yuntao

    2014-01-01

    Highlights: • We discussed the conceptual design of CFETR blanket RH maintenance system. • The mathematical model of electro-hydraulic servo system was calculated. • A fuzzy adaptive PD controller was designed based on control theory and experience. • The co-simulation models of the system were established with AMESim/Simulink. • The fuzzy adaptive PD algorithm was designed as the core strategy of the system. - Abstract: Based on the technical design requirements of China Fusion Engineering Test Reactor (CFETR) blanket remote handling (RH) maintenance, this paper focus on the control method of achieving high synchronization accuracy of electro-hydraulic servo system. Based on fuzzy control theory and practical experience, a fuzzy adaptive proportional-derivative (PD) controller was designed. Then a more precise co-simulation model was established with AMESim/Simulink. Through the analysis of simulation results, a fuzzy adaptive PD control algorithm was designed as the core strategy of electro-hydraulic servo control system

  20. Integration of Flex Nozzle System and Electro Hydraulic Actuators to Solid Rocket Motors

    Science.gov (United States)

    Nayani, Kishore Nath; Bajaj, Dinesh Kumar

    2017-10-01

    A rocket motor assembly comprised of solid rocket motor and flex nozzle system. Integration of flex nozzle system and hydraulic actuators to the solid rocket motors are done after transportation to the required place where integration occurred. The flex nozzle system is integrated to the rocket motor in horizontal condition and the electro hydraulic actuators are assembled to the flex nozzle systems. The electro hydraulic actuators are connected to the hydraulic power pack to operate the actuators. The nozzle-motor critical interface are insulation diametrical compression, inhibition resin-28, insulation facial compression, shaft seal `O' ring compression and face seal `O' ring compression.

  1. Modelling and LPV control of an electro-hydraulic servo system

    NARCIS (Netherlands)

    Naus, G.J.L.; Wijnheijmer, F.P.; Post, W.J.A.E.M.; Steinbuch, M.; Teerhuis, A.P.

    2006-01-01

    This paper aims to show the modelling and control of an hydraulic servo system, targeting at frequency domain based controller design and the implementation of a LPV controller. The actual set-up consists of a mass, moved by a hydraulic cylinder and an electro-hydraulic servo valve. A nonlinear

  2. Analysis of the jet pipe electro-hydraulic servo valve with finite element methods

    Directory of Open Access Journals (Sweden)

    Kaiyu Zhao

    2018-01-01

    Full Text Available The dynamic characteristics analysis about the jet pipe electro-hydraulic servo valve based on experience and mathematical derivation was difficult and not so precise. So we have analysed the armature feedback components, torque motor and jet pipe receiver in electrohydraulic servo valve by sophisticated finite element analysis tools respectively and have got physical meaning data on these parts. Then the data were fitted by Matlab and the mathematical relationships among them were calculated. We have done the dynamic multi-physical fields’ Simulink co-simulation using above mathematical relationship, and have got the input-output relationship of the overall valve, the frequency response and step response. This work can show the actual working condition accurately. At the same time, we have considered the materials and the impact of the critical design dimensions in the finite element analysis process. It provides some new ideas to the overall design of jet pipe electro-hydraulic servo valve.

  3. New method to improve dynamic stiffness of electro-hydraulic servo systems

    Science.gov (United States)

    Bai, Yanhong; Quan, Long

    2013-09-01

    Most current researches working on improving stiffness focus on the application of control theories. But controller in closed-loop hydraulic control system takes effect only after the controlled position is deviated, so the control action is lagged. Thus dynamic performance against force disturbance and dynamic load stiffness can’t be improved evidently by advanced control algorithms. In this paper, the elementary principle of maintaining piston position unchanged under sudden external force load change by charging additional oil is analyzed. On this basis, the conception of raising dynamic stiffness of electro hydraulic position servo system by flow feedforward compensation is put forward. And a scheme using double servo valves to realize flow feedforward compensation is presented, in which another fast response servo valve is added to the regular electro hydraulic servo system and specially utilized to compensate the compressed oil volume caused by load impact in time. The two valves are arranged in parallel to control the cylinder jointly. Furthermore, the model of flow compensation is derived, by which the product of the amplitude and width of the valve’s pulse command signal can be calculated. And determination rules of the amplitude and width of pulse signal are concluded by analysis and simulations. Using the proposed scheme, simulations and experiments at different positions with different force changes are conducted. The simulation and experimental results show that the system dynamic performance against load force impact is largely improved with decreased maximal dynamic position deviation and shortened settling time. That is, system dynamic load stiffness is evidently raised. This paper proposes a new method which can effectively improve the dynamic stiffness of electro-hydraulic servo systems.

  4. Degradation modeling and experiment of electro-hydraulic shift valve in contamination circumstances

    Directory of Open Access Journals (Sweden)

    Yong Liu

    2015-05-01

    Full Text Available In this article, a degradation assessment model has been proposed for electro-hydraulic shift valve in power-shift steering transmission. Our work is motivated by the failure mechanism of abrasive wear with a mathematic model. Abrasive wear will consecutively enlarge the clearance between the friction pairs. It is an overwhelming wear mechanism in the degradation of shift valve within serious contaminated fluid. Herein, a mathematic model is proposed by considering particle morphology and abrasion theory. Such model has been verified for its applicability and accuracy through comparison between the theoretical and experimental results.

  5. Using Feedback Error Learning for Control of Electro Hydraulic Servo System by Laguerre

    Directory of Open Access Journals (Sweden)

    Amir Reza Zare Bidaki

    2014-01-01

    Full Text Available In this paper, a new Laguerre controller is proposed to control the electro hydraulic servo system. The proposed controller uses feedback error learning method and leads to significantly improve performance in terms of settling time and amplitude of control signal rather than other controllers. All derived results are validated by simulation of nonlinear mathematical model of the system. The simulation results show the advantages of the proposed method for improved control in terms of both settling time and amplitude of control signal.

  6. System Topology Optimization - An Approach to System Design of Electro-Hydraulic-Mechanical Systems

    DEFF Research Database (Denmark)

    Andersen, T. O.; Hansen, M. R.; Conrad, Finn

    2003-01-01

    The current paper presents an approach to system design of combined electro-hydraulic-mechanical systems. The approach is based on the concurrent handling of the topology as well as the design parameters of the mechanical, hydraulic and controller sub- systems, respectively. Based on an initial...... design the procedure attempts to find the optimal topology and the related parameters. The topology considerations comprise the type of hydraulic pump, the employment of knee linkages or not as well as the type of hydraulic actuators. The design variables also include the signals to the proportional...... valve in a number of predefined load cases as well as the hydraulic and mechanical parameters....

  7. Analysis of an controller design for an electro-hydraulic servo pressure regulator

    DEFF Research Database (Denmark)

    Pedersen, Henrik C.; Andersen, Torben Ole; Madsen, A. M.

    2009-01-01

    Mobile hydraulics is in a transition phase, where electronic sensors and digital signal processors are starting to become standard on a high number of machines, hereby replacing hydraulic pilot lines and oering new possibilities with regard to both control and feasibility. For controlling some...... of the existing hydraulic components there are, however, still a need for being able to generate a hydraulic pilot pressure, as e.g. almost all open-circuit pumps are hydraulically controlled. The focus of the current paper is therefore on the analysis and controller design an electro-hydraulic servo pressure...... regulator, which generates a hydraulic LS-pressure based on an electrical reference, hereby synergistically integrating knowledge from all parts of the mechatronics area. The servo pressure regulator is used to generate the LS-signal for a variable displacement pump, and the paper rst presents...

  8. Output Feedback Control of Electro-Hydraulic Cylinder Drives using the Twisting Algorithm

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2014-01-01

    contributions in literature. This paper considers the twisting algorithm when applied directly for output feedback control, and with the design based on a reduced order model representation of an arbitrary valve driven hydraulic cylinder drive. The consequence of implementing such a controller with the well......This paper discusses the utilization of the so-called twisting algorithm when applied in output feedback position control schemes for electro-hydraulic cylinder drives. The twisting controller was the first second order sliding controller ever introduced, and can structure-wise be considered...... feedback controller may be successfully applied to hydraulic valve driven cylinder drives, with performance being on the level with a conventional surface based first order sliding mode controller....

  9. Robust Non-Chattering Observer Based Sliding Control Concept for Electro-Hydraulic Drives

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2013-01-01

    This paper presents an observer-based sliding mode control concept with chattering reduction, generally applicable for position tracking control of electro-hydraulic valve-cylinder drives (VCD's). The proposed control concept requires only common data sheet information and no knowledge on load...... extensive knowledge on system parameters nor advanced control theory. In order to accomplish this task, an integral sliding mode controller designed for the control derivative employing state observation is proposed, based on a generalized reduced order model structure of a VCD with unmatched valve ow......- and cylinder asymmetries. It is shown that limited attention can be given to bounds on parameter estimates, that chattering is reduced and the number of tuning parameters is reduced to the level seen in conventional PID schemes. Furthermore, simulation results demonstrate a high level of robustness when...

  10. Simulation of the electro-hydraulic control system of a BWR-5

    International Nuclear Information System (INIS)

    Acosta, M.; Montoya, J.; Chavez, H.

    1986-01-01

    The methodology used to develop the mathematical models for the simulation of the principal turbine electro-hydraulic control of the Laguna Verde Nuclear Plant (LVNP) is presented in this report. The development of the systems mathematical model is based on the response curves of each of its elements. Therefore, little error is expected with respect to real results. On the other hand, due to the fact that the greater part of the systems dynamics is governed by first order differential equations the explicit solution method is used allowing to solve the equations algebraically. The model is validated by comparing real valves and the ones obtained through our model. The analogical and logical parts will be tested considering transitory and steady state situations. The results are presented as computer graphs

  11. Nonlinear, Adaptive and Fault-tolerant Control for Electro-hydraulic Servo Systems

    DEFF Research Database (Denmark)

    Choux, Martin

    is designed and implemented on the test bed that successfully diagnoses internal or external leakages, friction variations in the actuator or fault related to pressure sensors. The presented algorithm uses the position and pressure measurements to detect and isolate faults, avoiding missed detection and false...... numerous attractive properties, hydraulic systems are always subject to potential leakages in their components, friction variation in their hydraulic actuators and deciency in their sensors. These violations of normal behaviour reduce the system performances and can lead to system failure...... if they are not detected early and handled. Moreover, the task of controlling electro hydraulic systems for high performance operations is challenging due to the highly nonlinear behaviour of such systems and the large amount of uncertainties present in their models. This thesis focuses on nonlinear adaptive fault...

  12. A switched energy saving position controller for variable-pressure electro-hydraulic servo systems.

    Science.gov (United States)

    Tivay, Ali; Zareinejad, Mohammad; Rezaei, S Mehdi; Baghestan, Keivan

    2014-07-01

    The electro-hydraulic servo system (EHSS) demonstrates a relatively low level of efficiency compared to other available actuation methods. The objective of this paper is to increase this efficiency by introducing a variable supply pressure into the system and controlling this pressure during the task of position tracking. For this purpose, an EHSS structure with controllable supply pressure is proposed and its dynamic model is derived from the basic laws of physics. A switching control structure is then proposed to control both the supply pressure and the cylinder position at the same time, in a way that reduces the overall energy consumption of the system. The stability of the proposed switching control system is guaranteed by proof, and its performance is verified by experimental testing. Copyright © 2014 ISA. Published by Elsevier Ltd. All rights reserved.

  13. Understanding the scabbling of concrete using microwave energy

    International Nuclear Information System (INIS)

    Buttress, A.J.; Jones, D.A.; Dodds, C.; Dimitrakis, G.; Campbell, C.J.; Dawson, A.; Kingman, S.W.

    2015-01-01

    Concrete blocks supplied by the UK Sellafield nuclear site were treated with microwave energy using a 15 kW system operating at 2.45 GHz. The effect of aggregate type (Whinstone, Gravel and Limestone); standoff distance; and effect of surface coating were studied to determine their influence on the systems performance in terms of mass and area removal rates and evaluate the controllability of the process. All blocks were scabbled successfully, with mass and area removal rates averaging 11.3 g s − 1 and 3 cm s − 1 respectively on treating large areas to a depth of 25 mm. The use of a Kevlar barrier between the block and applicator was found to significantly reduce the generation of dust as only 1.6% of the scabbled mass was in the < 106 μm — that generally considered to be airborne. Importantly Brazilian disc testing of the scabbled block showed that the process did not adversely affect structural properties of the test blocks after treatment

  14. Understanding the scabbling of concrete using microwave energy

    Energy Technology Data Exchange (ETDEWEB)

    Buttress, A.J., E-mail: adam.buttress@nottingham.ac.uk [Industrial Microwave Processing Research Group, Energy and Sustainability Research Division (United Kingdom); Jones, D.A.; Dodds, C.; Dimitrakis, G. [Industrial Microwave Processing Research Group, Energy and Sustainability Research Division (United Kingdom); Campbell, C.J. [Sellafield Ltd, Seascale, Cumbria (United Kingdom); Dawson, A. [Nottingham Transportation Engineering Centre, Infrastructure, Geomatics and Architecture Research Division (United Kingdom); Kingman, S.W. [Industrial Microwave Processing Research Group, Energy and Sustainability Research Division (United Kingdom)

    2015-09-15

    Concrete blocks supplied by the UK Sellafield nuclear site were treated with microwave energy using a 15 kW system operating at 2.45 GHz. The effect of aggregate type (Whinstone, Gravel and Limestone); standoff distance; and effect of surface coating were studied to determine their influence on the systems performance in terms of mass and area removal rates and evaluate the controllability of the process. All blocks were scabbled successfully, with mass and area removal rates averaging 11.3 g s{sup −} {sup 1} and 3 cm s{sup −} {sup 1} respectively on treating large areas to a depth of 25 mm. The use of a Kevlar barrier between the block and applicator was found to significantly reduce the generation of dust as only 1.6% of the scabbled mass was in the < 106 μm — that generally considered to be airborne. Importantly Brazilian disc testing of the scabbled block showed that the process did not adversely affect structural properties of the test blocks after treatment.

  15. Nonlinear dynamic modeling for smart material electro-hydraulic actuator development

    Science.gov (United States)

    Larson, John P.; Dapino, Marcelo J.

    2013-03-01

    Smart material electro-hydraulic actuators use hydraulic rectification by one-way check valves to amplify the motion of smart materials, such as magnetostrictives and piezoelectrics, in order to create compact, lightweight actuators. A piston pump driven by a smart material is combined with a hydraulic cylinder to form a self-contained, power-by-wire actuator that can be used in place of a conventional hydraulic system without the need for hydraulic lines and a centralized pump. The performance of an experimental actuator driven by a 12.7 mm diameter, 114 mm length Terfenol-D rod is evaluated over a range of applied input frequencies, loads, and currents. The peak performance achieved is 37 W, moving a 220 N load at a rate of 17 cm/s and producing a blocked pressure of 12.5 MPa. Additional tests are conducted to quantify the dynamic behavior of the one-way reed valves using a scanning laser vibrometer to identify the frequency response of the reeds and the effect of the valve seat and fluid mass loading. A lumped-parameter model is developed for the system that includes valve inertia and fluid response nonlinearities, and the model results are compared with the experimental data.

  16. Optimal Design and Hybrid Control for the Electro-Hydraulic Dual-Shaking Table System

    Directory of Open Access Journals (Sweden)

    Lianpeng Zhang

    2016-08-01

    Full Text Available This paper is to develop an optimal electro-hydraulic dual-shaking table system with high waveform replication precision. The parameters of hydraulic cylinders, servo valves, hydraulic supply power and gravity balance system are designed and optimized in detail. To improve synchronization and tracking control precision, a hybrid control strategy is proposed. The cross-coupled control using a novel based on sliding mode control based on adaptive reaching law (ASMC, which can adaptively tune the parameters of sliding mode control (SMC, is proposed to reduce the synchronization error. To improve the tracking performance, the observer-based inverse control scheme combining the feed-forward inverse model controller and disturbance observer is proposed. The system model is identified applying the recursive least squares (RLS algorithm and then the feed-forward inverse controller is designed based on zero phase error tracking controller (ZPETC technique. To compensate disturbance and model errors, disturbance observer is used cooperating with the designed inverse controller. The combination of the novel ASMC cross-coupled controller and proposed observer-based inverse controller can improve the control precision noticeably. The dual-shaking table experiment system is built and various experiments are performed. The experimental results indicate that the developed system with the proposed hybrid control strategy is feasible and efficient and can reduce the tracking errors to 25% and synchronization error to 16% compared with traditional control schemes.

  17. An energy-saving nonlinear position control strategy for electro-hydraulic servo systems.

    Science.gov (United States)

    Baghestan, Keivan; Rezaei, Seyed Mehdi; Talebi, Heidar Ali; Zareinejad, Mohammad

    2015-11-01

    The electro-hydraulic servo system (EHSS) demonstrates numerous advantages in size and performance compared to other actuation methods. Oftentimes, its utilization in industrial and machinery settings is limited by its inferior efficiency. In this paper, a nonlinear backstepping control algorithm with an energy-saving approach is proposed for position control in the EHSS. To achieve improved efficiency, two control valves including a proportional directional valve (PDV) and a proportional relief valve (PRV) are used to achieve the control objectives. To design the control algorithm, the state space model equations of the system are transformed to their normal form and the control law through the PDV is designed using a backstepping approach for position tracking. Then, another nonlinear set of laws is derived to achieve energy-saving through the PRV input. This control design method, based on the normal form representation, imposes internal dynamics on the closed-loop system. The stability of the internal dynamics is analyzed in special cases of operation. Experimental results verify that both tracking and energy-saving objectives are satisfied for the closed-loop system. Copyright © 2015 ISA. Published by Elsevier Ltd. All rights reserved.

  18. Hybrid Robust Control Law with Disturbance Observer for High-Frequency Response Electro-Hydraulic Servo Loading System

    Directory of Open Access Journals (Sweden)

    Zhiqing Sheng

    2016-04-01

    Full Text Available Addressing the simulating issue of the helicopter-manipulating booster aerodynamic load with high-frequency dynamic load superimposed on a large static load, this paper studies the design of the robust controller for the electro-hydraulic loading system to realize the simulation of this kind of load. Firstly, the equivalent linear model of the electro-hydraulic loading system under assumed parameter uncertainty is established. Then, a hybrid control scheme is proposed for the loading system. This control scheme consists of a constant velocity feed-forward compensator, a robust inner loop compensator based on disturbance observer and a robust outer loop feedback controller. The constant velocity compensator eliminates most of the extraneous force at first, and then the double-loop cascade composition control strategy is employed to design the compensated system. The disturbance observer–based inner loop compensator further restrains the disturbances including the remaining extraneous force, and makes the actual plant tracking a nominal model approximately in a certain frequency range. The robust outer loop controller achieves the desired force-tracking performance, and guarantees system robustness in the high frequency region. The optimized low-pass filter Q(s is designed by using the H∞ mixed sensitivity optimization method. The simulation results show that the proposed hybrid control scheme and controller can effectively suppress the extraneous force and improve the robustness of the electro-hydraulic loading system.

  19. Pentek concrete scabbling system: Baseline report; Greenbook (chapter)

    International Nuclear Information System (INIS)

    1997-01-01

    The Pentek scabbling technology was tested at Florida International University (FIU) and is being evaluated as a baseline technology. This report evaluates it for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek concrete scabbling system consisted of the MOOSE, SQUIRREL-I, and SQUIRREL-III scabblers. The scabblers are designed to scarify concrete floors and slabs using cross-section, tungsten carbide tipped bits. The bits are designed to remove concrete in 318 inch increments. The bits are either 9-tooth or demolition type. The scabblers are used with a vacuum system designed to collect and filter the concrete dust and contamination that is removed from the surface. The safety and health evaluation conducted during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure was minimal, but noise exposure was significant. Further testing for each of these exposures is recommended. Because of the outdoor environment where the testing demonstration took place, results may be inaccurate. It is feasible that the dust and noise levels will be higher in an enclosed operating environment. Other areas of concern were arm-hand vibration, whole-body vibration, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout

  20. Real-time tracking control of electro-hydraulic force servo systems using offline feedback control and adaptive control.

    Science.gov (United States)

    Shen, Gang; Zhu, Zhencai; Zhao, Jinsong; Zhu, Weidong; Tang, Yu; Li, Xiang

    2017-03-01

    This paper focuses on an application of an electro-hydraulic force tracking controller combined with an offline designed feedback controller (ODFC) and an online adaptive compensator in order to improve force tracking performance of an electro-hydraulic force servo system (EHFS). A proportional-integral controller has been employed and a parameter-based force closed-loop transfer function of the EHFS is identified by a continuous system identification algorithm. By taking the identified system model as a nominal plant model, an H ∞ offline design method is employed to establish an optimized feedback controller with consideration of the performance, control efforts, and robustness of the EHFS. In order to overcome the disadvantage of the offline designed controller and cope with the varying dynamics of the EHFS, an online adaptive compensator with a normalized least-mean-square algorithm is cascaded to the force closed-loop system of the EHFS compensated by the ODFC. Some comparative experiments are carried out on a real-time EHFS using an xPC rapid prototype technology, and the proposed controller yields a better force tracking performance improvement. Copyright © 2016. Published by Elsevier Ltd.

  1. A compound control strategy combining velocity compensation with ADRC of electro-hydraulic position servo control system.

    Science.gov (United States)

    Gao, Bingwei; Shao, Junpeng; Yang, Xiaodong

    2014-11-01

    In order to enhance the anti-jamming ability of electro-hydraulic position servo control system at the same time improve the control precision of the system, a compound control strategy that combines velocity compensation with Active Disturbance Rejection Controller (ADRC) is proposed, and the working principle of the compound control strategy is given. ADRC controller is designed, and the extended state observer is used for observing internal parameters uncertainties and external disturbances, so that the disturbances of the system are suppressed effectively. Velocity compensation controller is designed and the compensation model is derived to further improve the positioning accuracy of the system and to achieve the velocity compensation without disturbance. The compound control strategy is verified by the simulation and experiment respectively, and the simulation and experimental results show that the electro-hydraulic position servo control system with ADRC controller can effectively inhibit the external disturbances, the precise positioning control is realized after introducing the velocity compensation controller, and verify that the compound control strategy is effective. Copyright © 2014 ISA. Published by Elsevier Ltd. All rights reserved.

  2. The EH network

    DEFF Research Database (Denmark)

    Santolini, E; Salcini, A E; Kay, B K

    1999-01-01

    . Moreover, a number of cellular ligands of the domain have been identified and demonstrated to define a complex network of protein-protein interactions in the eukaryotic cell. Interestingly, many of the EH-containing and EH-binding proteins display characteristics of endocytic "accessory" proteins......, suggesting that the principal function of the EH network is to regulate various steps in endocytosis. In addition, recent evidence suggests that the EH network might work as an "integrator" of signals controlling cellular pathways as diverse as endocytosis, nucleocytosolic export, and ultimately cell...

  3. Multi-objective optimization of the control strategy of electric vehicle electro-hydraulic composite braking system with genetic algorithm

    Directory of Open Access Journals (Sweden)

    Zhang Fengjiao

    2015-03-01

    Full Text Available Optimization of the control strategy plays an important role in improving the performance of electric vehicles. In order to improve the braking stability and recover the braking energy, a multi-objective genetic algorithm is applied to optimize the key parameters in the control strategy of electric vehicle electro-hydraulic composite braking system. Various limitations are considered in the optimization process, and the optimization results are verified by a software simulation platform of electric vehicle regenerative braking system in typical brake conditions. The results show that optimization objectives achieved a good astringency, and the optimized control strategy can increase the brake energy recovery effectively under the condition of ensuring the braking stability.

  4. Robust H(∞) positional control of 2-DOF robotic arm driven by electro-hydraulic servo system.

    Science.gov (United States)

    Guo, Qing; Yu, Tian; Jiang, Dan

    2015-11-01

    In this paper an H∞ positional feedback controller is developed to improve the robust performance under structural and parametric uncertainty disturbance in electro-hydraulic servo system (EHSS). The robust control model is described as the linear state-space equation by upper linear fractional transformation. According to the solution of H∞ sub-optimal control problem, the robust controller is designed and simplified to lower order linear model which is easily realized in EHSS. The simulation and experimental results can validate the robustness of this proposed method. The comparison result with PI control shows that the robust controller is suitable for this EHSS under the critical condition where the desired system bandwidth is higher and the external load of the hydraulic actuator is closed to its limited capability. Copyright © 2015 ISA. Published by Elsevier Ltd. All rights reserved.

  5. Modal space three-state feedback control for electro-hydraulic servo plane redundant driving mechanism with eccentric load decoupling.

    Science.gov (United States)

    Zhao, Jinsong; Wang, Zhipeng; Zhang, Chuanbi; Yang, Chifu; Bai, Wenjie; Zhao, Zining

    2018-06-01

    The shaking table based on electro-hydraulic servo parallel mechanism has the advantage of strong carrying capacity. However, the strong coupling caused by the eccentric load not only affects the degree of freedom space control precision, but also brings trouble to the system control. A novel decoupling control strategy is proposed, which is based on modal space to solve the coupling problem for parallel mechanism with eccentric load. The phenomenon of strong dynamic coupling among degree of freedom space is described by experiments, and its influence on control design is discussed. Considering the particularity of plane motion, the dynamic model is built by Lagrangian method to avoid complex calculations. The dynamic equations of the coupling physical space are transformed into the dynamic equations of the decoupling modal space by using the weighted orthogonality of the modal main mode with respect to mass matrix and stiffness matrix. In the modal space, the adjustments of the modal channels are independent of each other. Moreover, the paper discusses identical closed-loop dynamic characteristics of modal channels, which will realize decoupling for degree of freedom space, thus a modal space three-state feedback control is proposed to expand the frequency bandwidth of each modal channel for ensuring their near-identical responses in a larger frequency range. Experimental results show that the concept of modal space three-state feedback control proposed in this paper can effectively reduce the strong coupling problem of degree of freedom space channels, which verify the effectiveness of the proposed model space state feedback control strategy for improving the control performance of the electro-hydraulic servo plane redundant driving mechanism. Copyright © 2018 ISA. Published by Elsevier Ltd. All rights reserved.

  6. Contaminated concrete scabbling at the Shippingport station decommissioning project

    International Nuclear Information System (INIS)

    Bauer, R.G.

    1989-01-01

    The Shippingport atomic power station was the first commercial nuclear power plant in the United States, joining the Duquesne Light Company (DLC) grid in December 1957. The Shippingport station was shut down in October 1982 and defueled in preparation for dismantling. On September 6, 1984, the Shippingport Station Decommissioning Project (SSDP) office of the US Department of Energy (DOE) assumed responsibility for the site. At turnover, there were several areas in the plant where radioactive contamination was entrained in concrete surfaces. The removal of contaminated concrete at SSDP was an important part of the decontamination to meet site release criteria, which is a major consideration in the decommissioning of nuclear power reactors. The highlights of this activity include: (1) development and application of remote scabbling tools, which effectively removed the contaminated concrete surfaces, and (2) use of scabblers minimized the removal of noncontaminated concrete by removing shallow layers of the surface and contributed to waste control, since the waste form enabled good packaging efficiency

  7. Laser scabbling for nuclear decommissioning: Effect of concrete composition on volume removal efficiency

    International Nuclear Information System (INIS)

    Peach, B.; Petkovski, M.; Blackburn, J.; Engelberg, D.L.

    2015-01-01

    The objective of this study was to determine the effect of concrete composition and moisture content on volume removal with the overarching goal to identify mechanism(s) responsible for laser scabbling. Tests under application of fixed laser parameters showed that concrete composition had a significant effect on material removal but the investigation into moisture content was inconclusive. The mechanical properties and size of coarse aggregates seemed to affect scabbling efficiency, rather than their chemical properties. The presence of pulverized fuel ash as a cement replacement material indicated to be a major factor that determines material removal volumes. (authors)

  8. Finite-time adaptive sliding mode force control for electro-hydraulic load simulator based on improved GMS friction model

    Science.gov (United States)

    Kang, Shuo; Yan, Hao; Dong, Lijing; Li, Changchun

    2018-03-01

    This paper addresses the force tracking problem of electro-hydraulic load simulator under the influence of nonlinear friction and uncertain disturbance. A nonlinear system model combined with the improved generalized Maxwell-slip (GMS) friction model is firstly derived to describe the characteristics of load simulator system more accurately. Then, by using particle swarm optimization (PSO) algorithm ​combined with the system hysteresis characteristic analysis, the GMS friction parameters are identified. To compensate for nonlinear friction and uncertain disturbance, a finite-time adaptive sliding mode control method is proposed based on the accurate system model. This controller has the ability to ensure that the system state moves along the nonlinear sliding surface to steady state in a short time as well as good dynamic properties under the influence of parametric uncertainties and disturbance, which further improves the force loading accuracy and rapidity. At the end of this work, simulation and experimental results are employed to demonstrate the effectiveness of the proposed sliding mode control strategy.

  9. Nonlinear Modeling and Coordinate Optimization of a Semi-Active Energy Regenerative Suspension with an Electro-Hydraulic Actuator

    Directory of Open Access Journals (Sweden)

    Farong Kou

    2018-01-01

    Full Text Available In order to coordinate the damping performance and energy regenerative performance of energy regenerative suspension, this paper proposes a structure of a vehicle semi-active energy regenerative suspension with an electro-hydraulic actuator (EHA. In light of the proposed concept, a specific energy regenerative scheme is designed and a mechanical properties test is carried out. Based on the test results, the parameter identification for the system model is conducted using a recursive least squares algorithm. On the basis of the system principle, the nonlinear model of the semi-active energy regenerative suspension with an EHA is built. Meanwhile, linear-quadratic-Gaussian control strategy of the system is designed. Then, the influence of the main parameters of the EHA on the damping performance and energy regenerative performance of the suspension is analyzed. Finally, the main parameters of the EHA are optimized via the genetic algorithm. The test results show that when a sinusoidal is input at the frequency of 2 Hz and the amplitude of 30 mm, the spring mass acceleration root meam square value of the optimized EHA semi-active energy regenerative suspension is reduced by 22.23% and the energy regenerative power RMS value is increased by 40.51%, which means that while meeting the requirements of vehicle ride comfort and driving safety, the energy regenerative performance is improved significantly.

  10. Extended state observer–based fractional order proportional–integral–derivative controller for a novel electro-hydraulic servo system with iso-actuation balancing and positioning

    Directory of Open Access Journals (Sweden)

    Qiang Gao

    2015-12-01

    Full Text Available Aiming at balancing and positioning of a new electro-hydraulic servo system with iso-actuation configuration, an extended state observer–based fractional order proportional–integral–derivative controller is proposed in this study. To meet the lightweight requirements of heavy barrel weapons with large diameters, an electro-hydraulic servo system with a three-chamber hydraulic cylinder is especially designed. In the electro-hydraulic servo system, the balance chamber of the hydraulic cylinder is used to realize active balancing of the unbalanced forces, while the driving chambers consisting of the upper and lower chambers are adopted for barrel positioning and dynamic compensation of external disturbances. Compared with conventional proportional–integral–derivative controllers, the fractional order proportional–integral–derivative possesses another two adjustable parameters by expanding integer order to arbitrary order calculus, resulting in more flexibility and stronger robustness of the control system. To better compensate for strong external disturbances and system nonlinearities, the extended state observer strategy is further introduced to the fractional order proportional–integral–derivative control system. Numerical simulation and bench test indicate that the extended state observer–based fractional order proportional–integral–derivative significantly outperforms proportional–integral–derivative and fractional order proportional–integral–derivative control systems with better control accuracy and higher system robustness, well demonstrating the feasibility and effectiveness of the proposed extended state observer–based fractional order proportional–integral–derivative control strategy.

  11. Real-time neural network-based self-tuning control of a nonlinear electro-hydraulic servomotor

    Energy Technology Data Exchange (ETDEWEB)

    Canelon, J.I.; Ortega, A.G. [Univ. del Zulia, Maracaibo, Zulia (Venezuela, Bolivarian Republic of). School of Electrical Engineering; Shieh, L.S. [Houston Univ., Houston, TX (United States). Dept. of Electrical and Computer Engineering; Bastidas, J.I. [Univ. del Zulia, Maracaibo, Zulia (Venezuela, Bolivarian Republic of). School of Mechanical Engineering; Zhang, Y.; Akujuobi, C.M. [Prairie View A and M Univ., Prairie View, TX (United States). Center of Excellence for Communication Systems Technology Research and Dept. of Engineering Technology

    2010-08-13

    For high power applications, hydraulic actuators offer many advantages over electromagnetic actuators, including higher torque/mass ratios; smaller control gains; excellent torque capability; filtered high frequency noise; better heat transfer characteristics; smaller size; higher speed of response of the servomechanism; cheaper hardware; and higher reliability. Therefore, any application that requires a large force applied smoothly by an actuator is a candidate for hydraulic power. Examples of such applications include vehicle steering and braking systems; roll mills; drilling rigs; heavy duty crane and presses; and industrial robots and actuators for aircraft control surfaces such as ailerons and flaps. It is extremely important to create effective control strategies for hydraulic systems. This paper outlined the real-time implementation of a neural network-based approach, for self-tuning control of the angular position of a nonlinear electro-hydraulic servomotor. Using an online training algorithm, a neural network autoregressive moving-average model with exogenous input (ARMAX) model of the system was identified and continuously updated and an optimal linear ARMAX model was determined. The paper briefly depicted the neural network-based self-tuning control approach and a description of the experimental equipment (hardware and software) was presented including the implementation details. The experimental results were discussed and conclusions were summarized. It was found that the approach proved to be very effective in the control of this fast dynamics system, outperforming a fine tuned PI controller. Therefore, although the self-tuning approach was computationally demanding, it was feasible for real-time implementation. 22 refs., 6 figs.

  12. Electro Hydraulic Hitch Control

    DEFF Research Database (Denmark)

    Hansen, M. R.; Andersen, T. O.; Nielsen, B.

    2003-01-01

    for most of the systems are that they operate on the hydrailc actuators generally providing the motive forces for moving the implement and/or attachment, typically a plough. The basic idea and physical working principle are to use the implement, moveable relative to the vehicle, as a damper mass. The paper...

  13. Superconducting magnet for EHS

    International Nuclear Information System (INIS)

    Desportes, H.; Duthil, R.; Celebart, J.C.; Leschevin, C.; Lesmond, C.

    1980-10-01

    A 55 Mjoules Magnet has been installed and commissioned at CERN for the Rapid Cycling Bubble Chamber of the EHS experiment (European Hybrid Spectrometer). The magnet consists of two separate circular coils, assembled with their axis horizontal into a massive iron structure, and provides a central field of 3 T in a useful volume of 1.4 m in diameter and 0.82 m gap with a completely azimuthally free acceptance of +-18 deg from the central plane. Special features of the magnet, which is otherwise of a classical pancake-type, bath-cooled design, are a relatively high average current density (2500 Amp/cm 2 ) and an elaborate support structure required by the particular force configuration within the iron structure

  14. EH domain of EHD1

    Energy Technology Data Exchange (ETDEWEB)

    Kieken, Fabien; Jovic, Marko; Naslavsky, Naava; Caplan, Steve, E-mail: scaplan@unmc.edu; Sorgen, Paul L. [University of Nebraska Medical Center, Department of Biochemistry and Molecular Biology and Eppley Cancer Center (United States)], E-mail: psorgen@unmc.edu

    2007-12-15

    EHD1 is a member of the mammalian C-terminal Eps15 homology domain (EH) containing protein family, and regulates the recycling of various receptors from the endocytic recycling compartment to the plasma membrane. The EH domain of EHD1 binds to proteins containing either an Asn-Pro-Phe or Asp-Pro-Phe motif, and plays an important role in the subcellular localization and function of EHD1. Thus far, the structures of five N-terminal EH domains from other proteins have been solved, but to date, the structure of the EH domains from the four C-terminal EHD family paralogs remains unknown. In this study, we have assigned the 133 C-terminal residues of EHD1, which includes the EH domain, and solved its solution structure. While the overall structure resembles that of the second of the three N-terminal Eps15 EH domains, potentially significant differences in surface charge and the structure of the tripeptide-binding pocket are discussed.

  15. EH domain of EHD1

    International Nuclear Information System (INIS)

    Kieken, Fabien; Jovic, Marko; Naslavsky, Naava; Caplan, Steve; Sorgen, Paul L.

    2007-01-01

    EHD1 is a member of the mammalian C-terminal Eps15 homology domain (EH) containing protein family, and regulates the recycling of various receptors from the endocytic recycling compartment to the plasma membrane. The EH domain of EHD1 binds to proteins containing either an Asn-Pro-Phe or Asp-Pro-Phe motif, and plays an important role in the subcellular localization and function of EHD1. Thus far, the structures of five N-terminal EH domains from other proteins have been solved, but to date, the structure of the EH domains from the four C-terminal EHD family paralogs remains unknown. In this study, we have assigned the 133 C-terminal residues of EHD1, which includes the EH domain, and solved its solution structure. While the overall structure resembles that of the second of the three N-terminal Eps15 EH domains, potentially significant differences in surface charge and the structure of the tripeptide-binding pocket are discussed

  16. Use of highly pressurized liquid nitrogen technology for concrete scabbling application at SICN nuclear facility - 59282

    International Nuclear Information System (INIS)

    Moggia, Fabrice; Vaudey, Claire-Emilie; Damerval, Frederique; Varet, Thierry; Toulemonde, Valerie; Richard, Frederic; Anderson, Gary

    2012-01-01

    The decommissioning process is a quite long and complicated stage who may take few years or decades to be achieved. Generally, this process involves the implementation of a large number of technologies dedicated to cutting and decontamination operations. Based on this finding, the Clean- Up Business Unit of AREVA with Air Liquide decided to start the development of a new technology based on the use of liquid nitrogen (-140 deg. C / 3500 bar). The NitroJet R process is a quite interesting and promising technology. It can be used, as we described in this document, for concrete scabbling operations but also for decontamination and cutting applications. The Clean-Up Business Unit, with its partner Air Liquide, realized a complete study of this technology including several tests and optimizations to be able to handle it in a nuclear environment. Thus, we did: - increase of the reliability of the machine, - nuclearization of the system (including the development of efficient shroud system and efficient HP pipes insulation); - development of a dedicated bearer for automatic configuration; - optimization of parameters for D and D applications. As we already mentioned, NitroJet R technology showed promising perspectives as: - economic: increase of rate processing, decrease in site monitoring costs, - environmental: use of an inert gas, no secondary waste generation, non use of chemical, dry process, - social: less strenuous work, decrease of operator dosimetry compatible with ALARA principle The future for the NitroJet R technology will be its implementation in a real high level activity environment. This process will be used in spring 2012 in AREVA nuclear reprocessing facility of La Hague (France) to accomplish concrete scabbling applications. This test will be the last of a long development period before industrial exploitation. (authors)

  17. Draft genome sequence of four coccolithoviruses: Emiliania huxleyi virus EhV-88, EhV-201, EhV-207, and EhV-208.

    Science.gov (United States)

    Nissimov, Jozef I; Worthy, Charlotte A; Rooks, Paul; Napier, Johnathan A; Kimmance, Susan A; Henn, Matthew R; Ogata, Hiroyuki; Allen, Michael J

    2012-03-01

    The Coccolithoviridae are a group of viruses which infect the marine coccolithophorid microalga Emiliania huxleyi. The Emiliania huxleyi viruses (known as EhVs) described herein have 160- to 180-nm diameter icosahedral structures, have genomes of approximately 400 kbp, and consist of more than 450 predicted coding sequences (CDSs). Here, we describe the genomic features of four newly sequenced coccolithoviruses (EhV-88, EhV-201, EhV-207, and EhV-208) together with their draft genome sequences and their annotations, highlighting the homology and heterogeneity of these genomes to the EhV-86 model reference genome.

  18. Do microbial exudates control EH electrode measurements?

    Science.gov (United States)

    Markelova, E.; Parsons, C. T.; Smeaton, C. M.; Van Cappellen, P.

    2017-12-01

    Redox electrodes are widely used as simple, inexpensive monitoring devices to rapidly measure redox potentials (EH) of waterlogged soils, sediments, and aquifers. While a variety of physicochemical and biogeochemical factors have been involved to explain measured EH values, the role of microorganisms remains comparatively understudied and uncertain. Besides catalyzing many inorganic redox reactions (e.g., nitrate reduction), microorganisms produce a variety of redox-active organic compounds (e.g., NAD+/NADH, GSSG/2GSH, FAD/FADH2), which can be released into the surrounding environment via active secretion, passive diffusion, or cell lysis. To isolate different microbial effects on EH measurements, we performed batch experiments using S. oneidensis MR-I as a model heterotrophic microorganism and flavins as example microbial exudates [1]. We monitored EH and pH along with flavin production (fluorescence measurements) during dissimilatory nitrate reduction to ammonium (DNRA). Dissolved flavins increased to 0.2 mM (riboflavin equivalent) under anoxic conditions during complete consumption of 1 mM nitrate by DNRA at pH 7.4 and 30 °C over 80 hours. The observed redox cascade from +255 to -250 mV did not follow the EH predicted for the reduction of NO3- to NO2- and NO2- to NH4+ by the Nernst equation. However, a set of separate abiotic experiments on the photoreduction of synthetic flavins (LMC, RF, FMN, and FAD, Sigma Aldrich) under the same conditions indicated that measured EH values are buffered at +270 ± 20 mV and -230 ± 50 mV when oxidized and reduced flavin species dominate, respectively. Moreover, based on the temporal changes in EH, we speculate that NO3- reduction by S. oneidensis consumes reduced flavins (i.e., NO3- accepts electrons from reduced flavins) and generates oxidized flavins, thus buffering EH at +255 mV. By contrast, NO2- reduction to NH4+ is independent of flavin speciation, which leads to the accumulation of reduced flavins in the solution and

  19. Recognition specificity of individual EH domains of mammals and yeast

    DEFF Research Database (Denmark)

    Paoluzi, S; Castagnoli, L; Lauro, I

    1998-01-01

    by characterizing the peptide-binding preference of 11 different EH domains from mammal and yeast proteins. Ten of the eleven EH domains could bind at least some peptides containing an Asn-Pro-Phe (NPF) motif. By contrast, the first EH domain of End3p preferentially binds peptides containing an His-Thr/Ser-Phe (HT...

  20. Operating Experience Insights into Pipe Failures for Electro-Hydraulic Control and Instrument Air Systems in Nuclear Power Plant. A Topical Report from the Component Operational Experience, Degradation and Ageing Programme

    International Nuclear Information System (INIS)

    2015-01-01

    2010. The majority of the member organisations of the two projects were the same, often being represented by the same person. In May 2011, thirteen countries signed the CODAP 1. Term Agreement (Canada, Chinese Taipei, Czech Republic, Finland, France, Germany, Japan, Korea (Republic of), Slovak Republic, Spain, Sweden, Switzerland and the United States). The 1. Term work plan includes the preparation of Topical Reports to foster technical co-operation and to deepen the understanding of national differences in ageing management. The Topical Reports constitute CODAP Event Database and Knowledge Base insights reports and as such act as portals for future database application projects and in-depth studies of selected degradation mechanisms. Prepared in 2013 and published as NEA/CSNI/R(2014)6, a first Topical Report addressed flow accelerated corrosion (FAC) of carbon steel and low alloy steel piping. This, the second Topical Report addresses operating experience with electro-hydraulic control (EHC) and instrument air (IA) system piping. Degradation and failure of EHC or IA piping can adversely affect plant operability, and under certain circumstances lead to safety challenges. Both systems consist of significant lengths of small-diameter piping. The typical EHC system piping material is stainless steel; Type 304 or 316. Plants generally use carbon steel, copper, stainless steel, galvanised steel or combinations of two or more material types for IA system piping. The CODAP Topical Report on 'EHC and IA Piping Systems' includes a primer on the environmental and operational factors affecting the structural integrity of respective system, and evaluates service experience data as recorded in the CODAP Event Database. Also included in the report are descriptions of the national EHC and IA ageing management programme approaches and a summary of other information collected in the CODAP Knowledge Base. The report has been prepared by the CODAP Project Review Group, with

  1. Case study : Mergers and acquisitions blending EHS cultures

    Energy Technology Data Exchange (ETDEWEB)

    Shoji-Lee, L.A. [Duke Energy Gas Transmission, Vancouver, BC (Canada)

    2003-06-03

    In September 2001, Duke Energy acquired the assets of Westcoast Energy Inc. (WEI). Duke Energy's expertise lies in gas gathering, processing, transportation, storage, distribution and marketing. It also specializes in electric generation, transmission and distribution. Westcoast Energy managed a portfolio of natural gas and electric supply, delivery and trading, with international assets in Mexico, Indonesia and China. Since the acquisition of WEI, Duke Energy has adopted an Environment, Health and Safety (EHS) model that will provide assistance in the transition to dealing with different cultures. The integration is meant to identify steps to evaluate and integrate new assets into a common EHS Management System, and to identify areas of discrepancy and opportunities for synergies. This report describes the EHS Management System, with respect to compliance, assurance and performance standards for air issues, waste management, contaminated sites, emergency response, and performance indicators. tabs., figs.

  2. Bertolette Selected as EHS Champion of Safety | Poster

    Science.gov (United States)

    Dan Bertolette has been selected as the most recent NCI at Frederick Champion of Safety, as part of the Champions of Safety Program sponsored by the Environment, Health, and Safety Program (EHS). The goal of the program, which began last year, is to raise awareness and promote a culture of safety by showing NCI at Frederick staff at work in their respective workplaces, according to Terri Bray, director, EHS. “Since we have so many varied work environments here, safety often takes on a different look, according to workplace. We want to take the opportunity to show real people in real situations, to encourage safety everywhere,” Bray said.

  3. The Eh-pH Diagram and Its Advances

    Directory of Open Access Journals (Sweden)

    Hsin-Hsiung Huang

    2016-01-01

    Full Text Available Since Pourbaix presented Eh versus pH diagrams in his “Atlas of Electrochemical Equilibria in Aqueous Solution”, diagrams have become extremely popular and are now used in almost every scientific area related to aqueous chemistry. Due to advances in personal computers, such diagrams can now show effects not only of Eh and pH, but also of variables, including ligand(s, temperature and pressure. Examples from various fields are illustrated in this paper. Examples include geochemical formation, corrosion and passivation, precipitation and adsorption for water treatment and leaching and metal recovery for hydrometallurgy. Two basic methods were developed to construct an Eh-pH diagram concerning the ligand component(s. The first method calculates and draws a line between two adjacent species based on their given activities. The second method performs equilibrium calculations over an array of points (500 × 800 or higher are preferred, each representing one Eh and one pH value for the whole system, then combines areas of each dominant species for the diagram. These two methods may produce different diagrams. The fundamental theories, illustrated results, comparison and required conditions behind these two methods are presented and discussed in this paper. The Gibbs phase rule equation for an Eh-pH diagram was derived and verified from actual plots. Besides indicating the stability area of water, an Eh-pH diagram normally shows only half of an overall reaction. However, merging two or more related diagrams together reveals more clearly the possibility of the reactions involved. For instance, leaching of Au with cyanide followed by cementing Au with Zn (Merrill-Crowe process can be illustrated by combining Au-CN and Zn-CN diagrams together. A second example of the galvanic conversion of chalcopyrite can be explained by merging S, Fe–S and Cu–Fe–S diagrams. The calculation of an Eh-pH diagram can be extended easily into another dimension, such

  4. Ageing temperature effect on inclination of martensite high strength steels EhP699, EhP678, EhP679 to corrosion cracking

    International Nuclear Information System (INIS)

    Rozenfel'd, I.L.; Spiridonov, V.B.; Konradi, M.V.; Krasnorutskaya, I.B.; Fridman, V.S.

    1979-01-01

    Stated are the data permitting to judge of the role of ageing temperature in the total number of factors, determining the inclination to corrosion cracking of high strength maraging steels, which contain chromium as a main alloying element. The inclination of the EhP699, EhP678, EhP679 steels to corrosion cracking was estimated on smooth stressed specimens in 3 % NaCl solution with the use of electrochemical polarization. The tensile stress resulted from deflection; anode and cathode current density was 10 mA/cm 2 . It is shown, that resistance to corrosion cracking depends on the ageing temperature: maximum sensitivity to corrosion cracking the steels manifest at the ageing temperatures, providing for maximum strength (470-500 deg). At the ageing temperatures by 20-30 deg over the temperature of this maximum the sensitivity to corrosion cracking disappears, which may result from the loss of coherence of strengthening phase in a matrix, from particle coagulation and stress relaxation in the crack peak

  5. EHS Open House: Learning Lab and Life Safety | Poster

    Science.gov (United States)

    Attendees of the Environment, Health, and Safety Program’s (EHS’) Open House had a chance to learn self-defense techniques, as well as visit with vendors demonstrating the latest trends in laboratory safety. “Working with sharps in labs is inherently dangerous, so EHS proactively focused on featuring equipment that would promote safer techniques,” said Siobhan Tierney, program

  6. Proteomic analysis of the EhV-86 virion

    Directory of Open Access Journals (Sweden)

    Lilley Kathryn S

    2008-03-01

    Full Text Available Abstract Background Emiliania huxleyi virus 86 (EhV-86 is the type species of the genus Coccolithovirus within the family Phycodnaviridae. The fully sequenced 407,339 bp genome is predicted to encode 473 protein coding sequences (CDSs and is the largest Phycodnaviridae sequenced to date. The majority of EhV-86 CDSs exhibit no similarity to proteins in the public databases. Results Proteomic analysis by 1-DE and then LC-MS/MS determined that the virion of EhV-86 is composed of at least 28 proteins, 23 of which are predicted to be membrane proteins. Besides the major capsid protein, putative function can be assigned to 4 other components of the virion: two lectin proteins, a thioredoxin and a serine/threonine protein kinase. Conclusion This study represents the first steps toward the identification of the protein components that make up the EhV-86 virion. Aside from the major capsid protein, whose function in the virion is well known and defined, the nature of the other proteins suggest roles involved with viral budding, caspase activation, signalling, anti-oxidation, virus adsorption and host range determination.

  7. Classroom Behavior Patterns of EMH, LD, and EH Students.

    Science.gov (United States)

    McKinney, James D.; Forman, Susan G.

    1982-01-01

    Investigated whether classroom teachers could differentiate among educable mentally handicapped (EMH), learning disabled (LD), and emotionally handicapped (EH) students based on perceptions of classroom behavior patterns. Ratings from classroom behavior inventory scales revealed that EMH students were distinguished by low intelligence, creativity,…

  8. Critical Readiness Review EHS Water Quality and Microbiology

    Science.gov (United States)

    Woo, Cindy

    2010-01-01

    Presentation reviews the status in reference to the Environmental, Health and Safety (EHS) of the water quality and microbiology for the International Space Station. It includes information about crew training, hardware delivery, and those items that will be returned for study.

  9. Alterações morfológicas causadas pela reaplicação de ondas de choque eletro-hidráulicas, no rim de ratos Morphologic alterations caused by electro-hydraulic shock waves reapplication in rat kidney

    Directory of Open Access Journals (Sweden)

    Juliano José Jorge

    2002-03-01

    Full Text Available A recidiva de cálculos urinários é freqüente, necessitando múltiplas aplicações de ondas de choque para seu tratamento. O objetivo deste trabalho é pesquisar alterações morfológicas agudas ocorridas nos rins de ratos submetidos a reaplicação de ondas de choque. Foram utilizados 48 ratos, distribuídos em 4 grupos de 12 animais. O grupo I recebeu duas aplicações de 2000 ondas de choque, com 14 KV de intensidade em intervalo de 14 dias entre as aplicações. O grupo II serviu de controle. O grupo III recebeu apenas uma aplicação. O grupo IV serviu de controle. Os rins foram examinados após 72 horas da aplicação das ondas de choque, observando: hemorragias subcapsular, intersticial e glomerular; perda da junção corticomedular; infiltrado crônico; necrose cortical e edema perivascular. Os resultados mostraram que a reaplicação de ondas de choque eletro-hidráulicas sobre rins de ratos não causou maiores danos que os produzidos pela primeira aplicação.Urinary calculus recidives are frequents, needing shock waves multiple applications for its treatment. This research studies acute morphological changes that occur in the kidneys of rats subjected to electro-hydraulic shock waves reapplication. The experiment used 48 rats, divided in four groups of 12. The first group received two 2,000 shock waves applications with 14 kV intensity and a fourteen-day interval between the applications. The third group received only one 2,000 shock waves application of the same intensity. The second and fourth groups were control groups. The kidneys were examined 72 hours after the application, observing: subcapsular, interstitial and glomerular hemorrhage; corticol results showed that electro-hydraulic shock reapplication in the rat kidneys didn’t greater damages than the first application.

  10. Phase composition of EhK 990-ID steel

    International Nuclear Information System (INIS)

    Rabinovich, A.V.; Milova, I.M.; Zaslavskij, Yu.B.; Neklyudov, I.M.; Chernyj, B.P.; Vanzha, A.F.; Zejdlits, M.P.; Kurasov, A.N.; Shmelev, Yu.S.

    1990-01-01

    The microstructure and phase composition of EhK99 steel have been investigated. It is shown that the scandium absolute concentration in solid solution of hot-deformed metal is directly proportional to their total content. It was established that the ratio between the scandium concentration in solid solution and the total content [Sc] ss/[Sc] s is not the function of the latter and constitutes (24.5±5.5) rel.%. The limiting scandium solubility in the EhK99 steel at temperature 1270 deg C was determined. It constitutes 0.07±0.005 mass%. In this paper proposed is the mechanism of intermetallide-and-second phase nucleation and growth during crystallization and homogenizing annealing. The recommendation for regimes of homogenizing annealing (1270 deg C, 12 hours) are given. It is shown that the homogenizing vacuum annealing may have an appreciable influence on the technique plasticity and production of good tubes of EhK99 steel with scandium content no more than 0.07wt%. 2 refs., 10 figs., 2 tabs

  11. The Eps15 C. elegans homologue EHS-1 is implicated in synaptic vesicle recycling

    DEFF Research Database (Denmark)

    Salcini, A E; Hilliard, M A; Croce, A

    2001-01-01

    implicated Eps15 in endocytosis, its function in the endocytic machinery remains unclear. Here we show that the Caenorhabditis elegans gene, zk1248.3 (ehs-1), is the orthologue of Eps15 in nematodes, and that its product, EHS-1, localizes to synaptic-rich regions. ehs-1-impaired worms showed temperature...

  12. On implications of e/h ≠ 1

    International Nuclear Information System (INIS)

    Nodulman, L.

    1991-01-01

    There is a considerable literature of studies of compensation in calorimeters at the microscopic and macroscopic level. I doubt that the exercise described here adds any fundamental understanding to previous studies, but it can be helpful in organizing thinking. Previous attempts at motivating the expense of a compensating calorimeter for an SSC detector have tended to show that noncompensation effects get buried by cone corrections and such. A marginally significant resolution increase was found in Z/Z' study for the LOl. Despite the certainty of reinvention, I opted to study the effects of e/h ≠ 1 in dijet balance, which will undoubtedly be used to extend calibrations across boundaries and study detector jet resolution. Although this is not a physics process which could offer some requirement for what is good enough, it does allow jet resolution to be reasonably defined

  13. Characterization of a Rab11-like GTPase, EhRab11, of Entamoeba histolytica.

    Science.gov (United States)

    McGugan, Glen C; Temesvari, Lesly A

    2003-07-01

    The Entamoeba histolytica Rab11 family of small molecular weight GTPases consists of three members, EhRab11, EhRab11B, and EhRab11C. The functions of these Rabs in Entamoeba have not been determined. Therefore, as an approach to elucidate the role of the Rab11 family of GTPases in Entamoeba, immunofluorescence microscopy was undertaken to define the subcellular localization of one member of this family, EhRab11. Under conditions of growth, EhRab11 displayed a punctate pattern in the cytoplasm of trophozoites. EhRab11 did not colocalize with markers for the Golgi apparatus, endoplasmic reticulum, pinosomes, phagosomes, or compartments formed by receptor-mediated endocytosis, suggesting that this Rab may not play a role in vesicle trafficking between these organelles. Under conditions of iron and serum starvation, EhRab11 was translocated to the periphery of the cell. The altered cellular localization was accompanied by multinucleation of the cells as well as the acquisition of detergent resistance by the cells, features that are characteristic of Entamoeba cysts. The translocation of EhRab11 to the periphery of the cell during iron and serum starvation was specific as the subcellular localizations of two other Rab GTPases, EhRab7 and EhRabA, were not altered under the same conditions. In addition, the formation of multinucleated cells by inhibition of cytokinesis was not sufficient to induce the translocation of EhRab11 to the cell periphery. Taken together, the data suggest that iron and serum starvation may induce encystation in E. histolytica and that EhRab11 may play a role in this process. Moreover, these studies are the first to describe a putative role for a Rab GTPase in encystation in Entamoeba sp.

  14. Electromagnetic hypersensitivity (EHS) in the media - a qualitative content analysis of Norwegian newspapers.

    Science.gov (United States)

    Huiberts, Ashild; Hjørnevik, Mari; Mykletun, Arnstein; Skogen, Jens C

    2013-01-01

    Electromagnetic hypersensitivity (EHS) is a condition characterized by experiencing symptoms after perceived exposure to weak electromagnetic fields (EMFs). There is substantial debate concerning the aetiology of EHS, but experimental data indicate no association between EHS and actual presence of EMFs. Newspapers play a key role in shaping peoples' understanding of health-related issues. The aim of this study was to describe the content of newspaper articles concerning aetiology and treatment of EHS. Qualitative content analysis of newspaper articles. Norwegian newspaper articles were identified using a comprehensive electronic media archive. Norwegian newspaper articles published between 1 February 2006 and 11 August 2010. Statements coded according to source of information, whether it was pro or con scientific evidence on EHS aetiology, and type of intervention presented as treatment option for EHS. Of the statements concerning EHS aetiology (n = 196), 35% (n = 69) were categorized as pro evidence, 65% (n = 127) as con evidence. Of the statements about EHS interventions assessed, 78% (n = 99) were categorized as 'radiance reduction', 4% (n = 5) as 'complementary medicine', and 18% (n = 23) as 'other'. Cognitive behavioural therapy (CBT) and psychotropic drugs were never presented as possible treatment options for EHS. The newspaper media discourse of EHS aetiology and recommended treatment interventions is much in conflict with the current evidence in the field. The majority of statements concerning aetiology convey that EHS is related to the presence of weak EMFs, and radiance reduction as the most frequently conveyed measure to reduce EHS-related symptoms.

  15. Application of RIA of PRA, AT II and NPY in typing and therapy of EH patients

    International Nuclear Information System (INIS)

    Yang Yongqing; Wang Xiaozhou; Jiang Qinian

    2001-01-01

    Objective: To study the typing and AT II receptor inhibitor therapy for essential hypertension (EH) patients. Methods: Plasma RA, AT II and NPY levels were measured by radioimmunoassay (RIA) in 208 Patients with EH and 100 controls; plasma NPY levels were measured in 40 EH patients before and after AT II receptor inhibitor therapy. The mean coefficient of variation for intra and inter batch-assay were less than 10% and 15% respectively. Results: In 208 EH patients plasma PRA levels were increased, normal and decreased in 17.8%, 71.6% and 10.6% respectively, while in 128 EH patients Plasma AT II levels were increased, normal and decreased in 20.3%, 64.1% and 15.6% respectively. In 69 EH Plasma NPY levels were significantly higher than those in 40 control subjects. (17 grade I EH, 137.3 +- 32.6 pg/mL; 28 grade II EH, 148.5 +- 41.1 pg/mL; 24 grade III EH, 162.4 +- 42.7 pg/mL; 40 controls, 118.5 +- 30.5 pg/mL). In 40 EH patients plasma NPY levels were decreased after AT II receptor inhibitor therapy as the blood pressure decreased. Conclusion: Typing of EH patients according to levels of plasma PRA and AT II is useful in guiding treatment. AT II receptor inhibitors are indicated in those patients with increased plasma levels and NPY levels can be used for appraisal of the treatment efficacy

  16. Identification of EhTIF-IA: The putative E. histolytica orthologue of the ...

    Indian Academy of Sciences (India)

    2016-02-04

    Feb 4, 2016 ... We have identified the E. histolytica equivalent of TIF-1A (EhTIF-IA) by homology search within ..... a putative EhTIF-IA with e-value (3e−25). Comparison of .... some biogenesis is correlated with altered rates of rDNA transcription ..... ylation by CK2 facilitates rDNA transcription by promoting dissociation of ...

  17. Digital electro-hydraulic control system for nuclear turbine

    International Nuclear Information System (INIS)

    Yokota, Yutaka; Tone, Youichi; Ozono, Jiro

    1985-01-01

    The unit capacity of steam turbines for nuclear power generation is very large, accordingly their unexpected stop disturbs power system, and the lowering of their capacity ratio exerts large influence on power generation cost. Therefore, very high reliability is required for turbine EHC controllers which directly control the turbines for nuclear power generation. In order to meet such requirement, Toshiba Corp. has developed high reliability type analog tripled turbine EHC controllers, and delivered them to No. 3 plant in the Fukushima No. 2 Nuclear Power Station and No. 1 plant in the Kashiwazaki Kariwa Nuclear Power Station, Tokyo Electric Power Co., Inc. At present, the trial operation is under way. The development of digital EHC controllers was begun in 1976, and through the digital EHC for a test turbine and that for a small turbine, the digital EHC controllers for the turbines for nuclear power generation were developed. In this paper, the function, constitution, features and maintenance of the digital tripled EHC controllers for the turbines for nuclear power generation, the application of new technology to them, and the confirmation of the control function by simulation are reported. (Kako, I.)

  18. Ductile fracture of two-phase welds under 77K. [Steel-EhP810, steel-EhP666, steel-08Kh18N10T, steel-EhP659-VI, steel-chP810

    Energy Technology Data Exchange (ETDEWEB)

    Yushchenko, K.A.; Voronin, S.A.; Pustovit, A.I.; Shavel' , A.V.

    The effect of the type of welding and fillers on crack resistance of welded joints high-strength steel EhP810 and its various compounds with steels EhP666, 08Kh18N10T has been studied. For the welding of steel EhP810 with steels EhP810, EhP666, 08Kh18N10T electron-beam, automatic, argon tungsten arc with non-consumable electrode with various fillers, as well as argon metal-arc welding with consumable electrode, were used. It is shown, that for a joint, made by electron-beam welding, parameters sigmasub(u), Ksub(IcJ), KCV are higher than for a joint of a similar phase structure made using filler wire EhP659-VI. It is explained by the fact, that during electron-beam welding joint metal refining takes place, which removes gases. In welded joints of chP810 steel, having joints with austenitic structure, characteristic of crack resistance Ssub(c) increases by more than 0.2 mm in contrast to two-phase joints, which conventional yield strength at 77 K exceeds 1000 MPa. It is worth mentioning, that for other classes of steels formation of two-phase structure of joint increases welded joint resistance to brittle fracture. It is possible to obtain the required structure of joint with assigned level of resistance to brittle fracture by means of the use of different fillers, optimum and welding procedure, regulating the part of the basic metal in joint content.

  19. Chemical Shift Assignments of the C-terminal Eps15 Homology Domain-3 EH Domain*

    Science.gov (United States)

    Caplan, Steve; Sorgen, Paul L.

    2013-01-01

    The C-terminal Eps15 homology (EH) domain 3 (EHD3) belongs to a eukaryotic family of endocytic regulatory proteins and is involved in the recycling of various receptors from the early endosome to the endocytic recycling compartment or in retrograde transport from the endosomes to the Golgi. EH domains are highly conserved in the EHD family and function as protein-protein interaction units that bind to Asn-Pro-Phe (NPF) motif-containing proteins. The EH domain of EHD1 was the first C-terminal EH domain from the EHD family to be solved by NMR. The differences observed between this domain and proteins with N-terminal EH domains helped describe a mechanism for the differential binding of NPF-containing proteins. Here, structural studies were expanded to include the EHD3 EH domain. While the EHD1 and EHD3 EH domains are highly homologous, they have different protein partners. A comparison of these structures will help determine the selectivity in protein binding between the EHD family members and lead to a better understanding of their unique roles in endocytic regulation. PMID:23754701

  20. Eh and fission product solubilities: two factors in the leaching of UO2

    International Nuclear Information System (INIS)

    Ogard, A.E.; Duffy, C.J.

    1981-01-01

    Eh was found to have a large effect on the dissolution of UO 2 in water at pH 4. As was estimated from thermodynamic data, the solubility was found to decrease as the oxygen fugacity, and therefore the Eh of the water, was decreased. Some of the rare earths and other actinides such as europium, cerium, americium, and plutonium released during the leaching of a spent fuel element behaved differently. These elements were not affected to any large extent by the variation in Eh of these experiments. It has been postulated that these elements reached their solubility limits and precipitated as the spent fuel was leached. 2 figures, 2 tables

  1. The e/h ratio of the ATLAS hadronic tile calorimeter

    International Nuclear Information System (INIS)

    Budagov, Yu.A.; Vinogradov, V.B.; Kul'chitskij, Yu.A.; Kuz'min, M.V.

    2002-01-01

    We have determined the e/h ratios of the Module-0 of the ATLAS iron-scintillator barrel hadron tile calorimeter for five values of pseudorapidity η in the range of -0.55 ≤ η ≤ -0.15 for the beam energy range from 10 to 300 GeV on the basis of the July 1999 test beam data. These e/h ratios demonstrate independence from |η| value. The mean value is e/h = 1.362 + 0.006. The results are compared with the existing experimental data and with some Monte Carlo calculations

  2. Development of pH-Eh multi-stat system and its application to uranium chemistry

    International Nuclear Information System (INIS)

    Kirishima, A.; Kitatsuji, Y.; Kimura, T.

    2005-01-01

    Full text of publication follows: Redox potential Eh is one of the most important thermodynamic parameters beside pH and ionic strength. Since uranium, neptunium and plutonium may exist in various oxidation states in aqueous solution, a shift in Eh changes their chemical behavior drastically. The conventional ways of Eh adjustment in a sample solution can be classified into two types, that is, dissolution of suitable amounts of reductants or oxidants, and the electrochemical technique consisting of a potentiostat and electrodes. Coexistence of a certain amount of redox reagents generates Eh values being homogeneous in a whole solution system, while it is difficult to adjust Eh precisely to a designated value by varying the concentration of redox reagents. On the other hand, a potentiostat controls the Eh just on the electrode surface, and, therefore, the Eh of the bulk solution is never controlled when the concentration of the existing redox ion pairs is low. Because of these demerits of both techniques, bulk Eh of the solution system has not been quantitatively controlled so far unlike to pH and ionic strength. When it comes to the thermodynamical aspects of actinide speciation, the factor that governs the system is not an electrode surface Eh but the bulk solution Eh. Therefore, to study actinide reactions occurring with Eh shifts in a given pH region more quantitatively, the present work focuses on the development of a pH-Eh multi-stat system which makes it possible to select Eh and pH values independently and keep them constant. The system consists of two automatic burettes injecting acid or alkaline solution, 1. 10 -3 M of supporting redox ion pairs such as [Fe 3+ /Fe 2+ ] and the bulk potentiostatic electrolysis equipment made up of a potentiostat and a Pt-black working electrode etc. The voltage applied to the working electrode controls the fraction of supporting redox ion pairs, which determine the bulk Eh of the system. A supporting redox ion pair [Fe 2

  3. 78 FR 1853 - EH California Hydro, LLC; Notice of Preliminary Permit Application Accepted for Filing and...

    Science.gov (United States)

    2013-01-09

    ... tailrace. Applicant Contact: Mr. John R. Collins, EH California Hydro, LLC, 5425 Wisconsin Avenue, Suite 600, Chevy Chase, Maryland 20815; phone: (301) 718-4433. FERC Contact: Jim Fargo at [email protected

  4. Elementary Surveillance (ELS) and Enhanced Surveillance (EHS) Validation via Mode S Secondary Radar Surveillance

    National Research Council Canada - National Science Library

    Grappel, Robert D; Harris, Garrett S; Kozar, Mark J; Wiken, Randall T

    2008-01-01

    ...) and Enhanced Surveillance (ERS) data link applications. The intended audience for this report is an engineering staff assigned the task of implementing a monitoring system used to determine ELS and EHS compliance...

  5. Ductility and resistance to deformation of EhP975 alloy during hot plastic working

    International Nuclear Information System (INIS)

    Baturin, A.I.; Martynov, A.I.

    1982-01-01

    Results of investigations into ductility and resistance to deformation of the EhP975 most heat-resistant difficult-to-form alloy of commercial melting in 1000-1200 deg C temperature range and at deformation rates epsilon = 0.1 - 25 s - 1 are presented. It is shown that ductility of EhP975 alloy grows rather slowly with increase of temperature approximately up to 1075 deg C, then sharp growth of ductility up to the maximum at 1120-1125 deg C is observed; ductility decreases above this temperature zone. It was also established that ductility of EhP975 alloy grows with increase of preliminary deformation degree. It is marked that high temperature annealing increases ductility of EhP975 alloy in comparison with (cast state), especially noticeably at high deformation rates

  6. Methods of simulating low redox potential (Eh) for a basalt repository

    International Nuclear Information System (INIS)

    Jantzen, C.M.

    1983-01-01

    Basalt groundwaters have inherently low redox potentials, approximately -0.4V, which can be measured with platinum electrodes, but are difficult to reproduce during leaching experiments. In the presence of deionized water, crushed basalt reaches the measured Eh-pH values of a basalt repository. Other waste package components, such as iron, will interact with groundwater in different ways under oxic or anoxic conditions since the presence of any redox active solid will affect the groundwater Eh. 26 references, 4 figures

  7. Penetration of hydrogen isotopes through EhI 698 alloy at high pressure and temperature

    International Nuclear Information System (INIS)

    Bystritskij, V.M.; Voznyak, Ya.; Granovskij, V.B.

    1986-01-01

    The paper deals with investigations of the process of hydrogen and deuterium penetration through the high-temperature alloy EhI-698 at a pressure up to 1 kbar and temperature up to 1050 K. Parameters of the process obey Sieverts's law and can be described by Arrenius's and Vant-Goff's equations. The obtained results lead to a conclusion that the alloy EhI-698 is good for vessels to be employed in hydrogen media

  8. Bench Scale Process for Low Cost CO2 Capture Using a Phase-Changing Absorbent: Topical Report EH&S Risk Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Westendorf, Tiffany; Farnum, Rachel; Perry, Robert; Herwig, Mark; Giolando, Salvatore; Green, Dianne; Morall, Donna

    2016-05-11

    GE Global Research was contracted by the Department of Energy to design and build a bench-scale process for a novel phase-changing aminosilicone-based CO2 capture solvent (award number DEFE0013687). As part of this program, a technology EH&S assessment (Subtask 5.1) has been completed for a CO2 capture system for a 550 MW coal-fired power plant. The assessment focuses on two chemicals used in the process, the aminosilicone solvent, GAP-0, and dodecylbenzenesulfonic acid (DDBSA), the GAP-0 carbamate formed upon reaction of the GAP-0 with CO2, and two potential byproducts formed in the process, GAP-0/SOx salts and amine-terminated, urea-containing silicone (also referred to as “ureas” in this report). The EH&S assessment identifies and estimates the magnitude of the potential air and water emissions and solid waste generated by the process and reviews the toxicological profiles of the chemicals associated with the process. Details regarding regulatory requirements, engineering controls, and storage and handling procedures are also provided in the following sections.

  9. Production of barium molybdate and tungstate on the base of ternary reciprocal Na, Ba long Cl, EhO4 (Eh - Mo, W) systems

    International Nuclear Information System (INIS)

    Garkushin, I.K.; Sechnoj, A.I.; Dibirov, M.A.; Trunin, A.S.

    1984-01-01

    Possibilities of the syntnesis of barium molybdate and tungstate on the base of ternary reciprocal Na, Ba parallel Cl, EhO 4 (Eh=Mo, W) system state diagrams are under study. It is shown that on the basis of these reciprocal state diagrams syntnesis of not only BaO 4 but also of other suhstances is possible. Purity of obtained chemical agents is basically dependent on qualification of initial components. Synthesis temperature is decreased and time is reduced as compared to other known methods. For substance synthesis, state diagrams examination (reaction type confirmation and component crystallization fields separation from compound crystallization fields) is necessary along with the calculation of the conventional thermochemical effect

  10. Seasonal variation in tissue estrogen-2/4-hydroxylases (EH) and in vitro effects of steroids on ovarian EH activity in the catfish Heteropneustes fossilis.

    Science.gov (United States)

    Chourasia, T K; Joy, K P

    2010-12-12

    A radiometric assay was used to measure microsomal EH activity from tritiated H(2)O formed during the conversion of [2,4 (3)H] estradiol-17β into catecholestrogens in the microsomal fractions of liver, brain and ovary of the catfish Heteropneustes fossilis. The validation data show that enzyme activity increased with incubation time, and substrate and cofactor (NADPH) concentrations, elicited temperature optima of 30-37°C and pH optima of 6.8-7.8. EH activity was strongly NADPH-dependent and in its absence only 13.48% activity was recorded. Liver recorded the highest enzyme activity, followed by brain and ovary. EH activity showed a significant seasonal variation with the peak activity in spawning phase and the lowest activity in resting phase. In the ovary, the follicular layer (theca and granulosa) elicited the highest activity over that of the denuded oocytes. Modulatory effects of steroids on ovarian enzyme activity were further demonstrated. The incubation of postvitellogenic follicles with 1, 10 or 100 nM concentrations of various steroids for 24 h produced varied effects on EH activity. Progesterone and 2-hydroxyestradiol-17β elicited strong suppressive effects on enzyme activity. Estrogens (E(1), E(2) and E(3)) suppressed the activity in a concentration-dependent manner. Among the progestins tested, 17,20α-dihydroxy-4-pregnen-3-one, the isomer of 17,20β-dihydroxy-4-pregnen-3-one (a teleost maturation-inducing steroid) showed the lowest depressing effect. Among androgens, the testosterone metabolite 11-ketotestosterone (functional teleost androgen) showed a high suppressing effect. Corticosteroids elicited low activity with cortisol suppressed the activity at higher concentrations. The study will form a basis to understand the physiological role of catecholestrogens in ovarian functions. Copyright © 2010 Elsevier Inc. All rights reserved.

  11. Resolving the EH6/7 level in 4H-SiC by Laplace-transform deep level transient spectroscopy

    International Nuclear Information System (INIS)

    Alfieri, G.; Kimoto, T.

    2013-01-01

    We show that Laplace transform deep level transient spectroscopy (LDLTS) is an effective technique for the separation of the overlapping emission rates of the EH 6 and EH 7 levels, which are known to constitute EH 6/7 , a mid-gap level in n-type 4H-SiC. The analysis of the electron irradiation dose, electric field dependence, and the effects of carbon interstitials injection on the emission rates of EH 6 and EH 7 shows that EH 7 is dominant over EH 6 and confirms that their nature is related to a carbon vacancy.

  12. Popular Cultural Struggle of "Islamist" Identity: Ehlisünnet TV Street Interviews

    OpenAIRE

    Gürel, Halil İbrahim; Şimşek-Rathke, Leyla

    2016-01-01

    This study aims to analyse and interpret Ehlisünnet TV (Ahsen TV, with its new name) emissions focussing on some “street interviews”, “street observatory shootings” and “street interview like mise en scenes” which are named as “social experiments” by the producers. The reporters of Ehlisünnet TV seem to have regularly conducted interviews in different parts of Istanbul such as Nişantaşı, Bakırköy, Eyüp, Karagümrük or Taksim. In those interviews, they put specific focus on Islamic lifestyle, s...

  13. Secular Variation and Physical Characteristics Determination of the HADS Star EH Lib

    Science.gov (United States)

    Pena, J. H.; Villarreal, C.; Pina, D. S.; Renteria, A.; Soni, A., Guillen, J. Calderon, J.

    2017-12-01

    Physical parameters of EH Lib have been determined based on observations carried out in 2015 with photometry. They have also served, along with samples from the years 1969 and 1986, to analyse the frequency content of EH Lib with Fourier Transforms. Recent CCD observations increased the times of maximum with twelve new times which helped us study the secular variation of the period with a method based on the minimization of the standard deviation of the O-C residuals. It is concluded that there may be a long-term period change.

  14. Study on the rhythmic variation of plasma cortisol levels in patients with essential hypertension (EH) and coronary heart disease (CHD)

    International Nuclear Information System (INIS)

    Zhu Mei; Wu Guo; Li Ying

    2007-01-01

    Objective: To study the rhythmic fluctuation of plasma cortisol levels in patients with EH and CHD. Methods: Plasma cortisol levels were determined with RIA at 8Am, 4Pm and midnight in 61 patients with EH, 46 patients with CHD and 36 controls. Results: The normal rhythmic fluctuation pattern of plasma cortisol levels was retained in the EH and CHD patients. However, the levels were all significantly higher in the patients than those in the controls, especially in the midnight specimens. Conclusion: Marked elevated plasma cortisol levels were observed in patients with EH and CHD, with the normal rhythmic fluctuation pattern retained. (authors)

  15. Developments in the monitoring and control of Eh and pH conditions in hydrothermal experiments

    International Nuclear Information System (INIS)

    Myers, J.; Ulmer, G.C.; Grandstaff, D.E.; Brozdowski, R.; Danielson, M.J.; Koski, O.H.

    1984-01-01

    In the design of a high-level nuclear waste repository it is essential to obtain accurate groundwater Eh-pH data. Design considerations such as the choice of matrix for the waste form, type and dimensions of canister material, use of buffers, and type and amount of backfill would all benefit from an exact knowledge of oxidation potentials (Eh) and acidity levels (pH) of the groundwater. The Basalt Waste Isolation Project (BWIP) has initiated a research effort to develop sensors which can be mounted in autoclaves to provide constant monitoring of the Eh-pH conditions that exist during waste form/barrier material/groundwater hydrothermal interaction tests. Sensors must withstand temperatures up to 300 0 C and pressures up to 300 bars. This report considers Teflon hydrogen diffusion membranes and zirconia pH sensors. The development of these sensors represents a significant advance in the environmental monitoring of Eh and pH conditions at elevated temperatures and pressures

  16. 1.8. Brand*, HA Badenhorst, FK 8iebrits and EH Kemm JP Hayes et ...

    African Journals Online (AJOL)

    Brand*, H.A. Badenhorst, F.K. 8iebrits and E.H. Kemm. Animal and Dairy Science Research Institute, Private Bag X2, Irene 1675, Republic of South Africa. J.P. Hayes. Department of Poultry Science, University of Stellenbosch, Stellenbosch 7600, Republic of South Africa. The experiment was conducted to compare the ...

  17. 76 FR 41501 - Notice of Intent To Award Affordable Care Act (ACA) Funding, EH09-907

    Science.gov (United States)

    2011-07-14

    ... network expansion and enhancement. Funding is appropriated under the Affordable Care Act (Pub. L. 111-148... Intent To Award Affordable Care Act (ACA) Funding, EH09-907 AGENCY: Centers for Disease Control and... in their FY 2011 applications submitted under funding opportunity EH09-907, ``National Environmental...

  18. Binding specificity and in vivo targets of the EH domain, a novel protein-protein interaction module

    DEFF Research Database (Denmark)

    Salcini, A E; Confalonieri, S; Doria, M

    1997-01-01

    EH is a recently identified protein-protein interaction domain found in the signal transducers Eps15 and Eps15R and several other proteins of yeast nematode. We show that EH domains from Eps15 and Eps15R bind in vitro to peptides containing an asparagine-proline-phenylalanine (NPF) motif. Direct...

  19. Emerging Interaction Patterns in the Emiliania huxleyi-EhV System.

    Science.gov (United States)

    Ruiz, Eliana; Oosterhof, Monique; Sandaa, Ruth-Anne; Larsen, Aud; Pagarete, António

    2017-03-22

    Viruses are thought to be fundamental in driving microbial diversity in the oceanic planktonic realm. That role and associated emerging infection patterns remain particularly elusive for eukaryotic phytoplankton and their viruses. Here we used a vast number of strains from the model system Emiliania huxleyi /Emiliania huxleyi Virus to quantify parameters such as growth rate (µ), resistance (R), and viral production (Vp) capacities. Algal and viral abundances were monitored by flow cytometry during 72-h incubation experiments. The results pointed out higher viral production capacity in generalist EhV strains, and the virus-host infection network showed a strong co-evolution pattern between E. huxleyi and EhV populations. The existence of a trade-off between resistance and growth capacities was not confirmed.

  20. The e/h method of energy reconstruction for combined calorimeter

    International Nuclear Information System (INIS)

    Kul'chitskij, Yu.A.; Kuz'min, M.V.; Vinogradov, V.B.

    1999-01-01

    The new simple method of the energy reconstruction for a combined calorimeter, which we called the e/h method, is suggested. It uses only the known e/h ratios and the electron calibration constants and does not require the determination of any parameters by a minimization technique. The method has been tested on the basis of the 1996 test beam data of the ATLAS barrel combined calorimeter and demonstrated the correctness of the reconstruction of the mean values of energies. The obtained fractional energy resolution is [(58 ± 3)%/√E + (2.5 ± 0.3)%] O+ (1.7 ± 0.2) GeV/E. This algorithm can be used for the fast energy reconstruction in the first level trigger

  1. Electron response and e/h ratio of ATLAS barrel hadron prototype calorimeter

    International Nuclear Information System (INIS)

    Budagov, Yu.A.; Vinogradov, V.B.; Arkadov, V.V.; Karapetyan, G.V.

    1995-01-01

    The detailed information about electron response, electron energy resolution and e/h ratio as a function of incident energy E, impact point Z and incidence angle Θ of ATLAS iron-scintillator hadron prototype calorimeter with longitudinal tile configuration is presented. These results are based on electron and pion beams data of E=20, 50, 100, 150, 300 GeV at Θ=10 deg, 20 deg, 30 deg, which were obtained during test beam period in July 1995. The obtained calibration constant is used for muon response converting from pC to GeV. The results are compared with existing experimental data and with some Monte Carlo calculations. For some E, Θ, Z values the compensation (e/h=1) is observed. 23 refs., 18 figs., 9 tabs

  2. The equation of state of n-pentane in the atomistic model TraPPE-EH

    Science.gov (United States)

    Valeev, B. U.; Pisarev, V. V.

    2018-01-01

    In this work, we study the vapor-liquid equilibrium in n-pentane. We use the TraPPE-EH (transferable potentials for phase equilibria-explicit hydrogen) forcefield, where each hydrogen and carbon atom is considered as independent center of force. The fluid behavior was investigated with different values of density and temperature by molecular dynamics method. The n-pentane evaporation curve was calculated in the temperature range of 290 to 390 K. The densities of the coexisting phases are also calculated. The compression curve at 370 K was calculated and isothermal bulk modulus was found. The simulated properties of n-pentane are in good agreement with data from a database of the National Institute of Standards and Technology, so the TraPPE-EH model can be recommended for simulations of hydrocarbons.

  3. At the European Hybrid Spectrometer (EHS) for the experiment NA27

    CERN Multimedia

    1983-01-01

    The photo shows a downstream section of the EHS. Interactions take place some 15 m behind the Intermediate Gamma Detector (IGD, blue)in the Lexan Bubble Chamber (LEBC). Ahead of IGD sits ISIS (photo 8107533X). Leaving IGD the interaction products then traverse a magnet M2 and a 12-m long gas Forward Cerenkov (FC) counter (partially seen at bottom, right). See Nucl. Instrum. Methods A258 (1987) 26-50.

  4. Effect of metals on the lytic cycle of the coccolithovirus, EhV86.

    Directory of Open Access Journals (Sweden)

    Martha eGledhill

    2012-04-01

    Full Text Available In this study we show that metals, and in particular copper (Cu, can disrupt the lytic cycle in the Emiliania huxleyi - EhV86 host-virus system. Numbers of virus particles produced per E. huxleyi cell and E. huxleyi lysis rates were reduced by Cu at total metal concentrations over 500 nM in the presence of EDTA (ethylenediaminetetraacetic acid, and 250 nM in the absence of EDTA in acute short term exposure experiments. Zinc (Zn, cadmium (Cd and cobalt (Co were not observed to affect the lysis rate of EhV86 in these experiments. The cellular glutathione (GSH content increased in virus infected cells, but not as a result of metal exposure. In contrast, the cellular content of phytochelatins (PCs increased only in response to metal exposure. The increase in gluthatione content is consistent with increases in the production of reactive oxygen species (ROS on viral infection, while increases in PC content are likely linked to metal homeostasis and indicate that metal toxicity to the host was not affected by viral infection. We propose that Cu prevents lytic production of EhV86 by interfering with virus DNA (deoxyribonucleic acid synthesis through a transcriptional block, which ultimately suppresses the formation of ROS, a biochemical response required for successful virus infection.

  5. Dietary safety assessment of genetically modified rice EH rich in β-carotene.

    Science.gov (United States)

    Wu, Yangyang; Xu, Yan; Du, Yanan; Zhao, Xiao; Hu, Ruili; Fan, Xiaorui; Ren, Fangfang; Yao, Quanhong; Peng, Rihe; Tang, Xueming; Zhao, Kai

    2017-08-01

    This 90-day study aimed to assess the dietary safety of transgenic rice EH which is rich in β-carotene. Two experimental groups of Sprague-Dawley rats were fed diets containing 45% rice flour of Zhonghua 11 rice and transgenic rice EH rich in β-carotene, respectively. The reference group was fed a diet containing standard feed nutrition. During the trial period, each rat was weighed and the food intake was recorded twice a week. Their behaviors were observed daily. In the end, blood samples were obtained from all anesthetized rats to measure the hematologic and serum chemistry indicators. Growth performance, anatomy and pathology of all organs in each group were analyzed. Although a few parameters were found to be statistically significantly different across groups, they were within the normal reference range for this breed and age of rats. Therefore, the changes were not considered to be diet related. The results revealed that the transgenic rice EH rich in β-carotene was as nutritious as Zhonghua 11 rice and showed a lack of biologically meaningful unintended effects. Copyright © 2017 Elsevier Inc. All rights reserved.

  6. High-speed parallel implementation of a modified PBR algorithm on DSP-based EH topology

    Science.gov (United States)

    Rajan, K.; Patnaik, L. M.; Ramakrishna, J.

    1997-08-01

    Algebraic Reconstruction Technique (ART) is an age-old method used for solving the problem of three-dimensional (3-D) reconstruction from projections in electron microscopy and radiology. In medical applications, direct 3-D reconstruction is at the forefront of investigation. The simultaneous iterative reconstruction technique (SIRT) is an ART-type algorithm with the potential of generating in a few iterations tomographic images of a quality comparable to that of convolution backprojection (CBP) methods. Pixel-based reconstruction (PBR) is similar to SIRT reconstruction, and it has been shown that PBR algorithms give better quality pictures compared to those produced by SIRT algorithms. In this work, we propose a few modifications to the PBR algorithms. The modified algorithms are shown to give better quality pictures compared to PBR algorithms. The PBR algorithm and the modified PBR algorithms are highly compute intensive, Not many attempts have been made to reconstruct objects in the true 3-D sense because of the high computational overhead. In this study, we have developed parallel two-dimensional (2-D) and 3-D reconstruction algorithms based on modified PBR. We attempt to solve the two problems encountered by the PBR and modified PBR algorithms, i.e., the long computational time and the large memory requirements, by parallelizing the algorithm on a multiprocessor system. We investigate the possible task and data partitioning schemes by exploiting the potential parallelism in the PBR algorithm subject to minimizing the memory requirement. We have implemented an extended hypercube (EH) architecture for the high-speed execution of the 3-D reconstruction algorithm using the commercially available fast floating point digital signal processor (DSP) chips as the processing elements (PEs) and dual-port random access memories (DPR) as channels between the PEs. We discuss and compare the performances of the PBR algorithm on an IBM 6000 RISC workstation, on a Silicon

  7. In-situ Eh sensor measurement and calibration: application to seafloor observatories

    Science.gov (United States)

    Ding, K.; Seyfried, W. E.; Tan, C.

    2013-12-01

    Eh measurement is often used with manned submersible and AUV assets as an effective way to detect and locate seafloor hydrothermal activity. Eh can be fundamentally and sensitively linked to dissolved H 2 , which, in turn, serves as a key constraint on subseafloor redox reactions. Moreover, Eh is now being increasingly relied on for event detection and process monitoring efforts intrinsic to cabled seafloor observatories. Due to seawater interaction with electrochemical components fundamental to the operation of the Eh sensor, however, the quality and reliability of the measurements are often compromised by signal drift, especially when the sensor is used for long term deployment. To solve this problem, a calibration protocol was developed and added to our previously constructed pH 'calibrator'. Thus, the integrated electrochemical system now permits the combined in-situ measurement and calibration of pH and Eh of seafloor hydrothermal fluids. Key aspects of the design for this calibration system are: (1) the sensing electrodes can be kept preserved in fluid of known pH, Eh and NaCl concentration prior to use, thereby preventing deterioration of electrode response characteristics by chemical and biological activity; (2) the system consists of valves and pumps for flow control, and therefore can be operated remotely with power from the seafloor cabled observatory, or as a stand-alone device, using battery power for shorter-term deployments. In both cases, standardization with on-board fluids of known redox, pH, and NaCl activity can be activated at any time, providing enhanced reliability (3) the current development is aimed at deep sea environments, cold seeps, and hydrothermal diffuse flow fluids at the temperatures up to 100°C and depths up to 4500 m. The in-situ operation is especially well-suited for use with cabled observatory for real time intervention and event response owing to enabled power supply and two way communications. Field tests have been

  8. 76 FR 8788 - National Nanotechnology Coordination Office; Bridging NanoEHS Research Efforts: A Joint US-EU...

    Science.gov (United States)

    2011-02-15

    ... OFFICE OF SCIENCE AND TECHNOLOGY POLICY National Nanotechnology Coordination Office; Bridging NanoEHS Research Efforts: A Joint US-EU Workshop: Public Meeting AGENCY: National Nanotechnology Coordination Office, STPO. ACTION: Notice of public meeting. SUMMARY: The National Nanotechnology Coordination...

  9. Eh-pH diagrams of the V-H2O system at 25,60 and 1000C

    International Nuclear Information System (INIS)

    Silva, F.T. da; Ogasawara, T.; Cassa, J.C.S.

    1987-01-01

    Free energies of the formation of vanadium ions in aqueous solutions at elevated temperatures were determined. Eh-pH diagrams at 25 0 C, 60 0 C and 100 0 C at different vanadium concentrations, using microcomputers were calculated and obtained. The effects of temperature and vanadium concentration on the predominance of vanadium species were examined. The Eh-pH diagrams for the V-H 2 O system were evaluated by comparisons with experimental data. (Author) [pt

  10. A new mercury-accumulating Mucor hiemalis strain EH8 from cold sulfidic spring water biofilms.

    Science.gov (United States)

    Hoque, Enamul; Fritscher, Johannes

    2016-10-01

    Here, we report about a unique aquatic fungus Mucor hiemalisEH8 that can remove toxic ionic mercury from water by intracellular accumulation and reduction into elemental mercury (Hg 0 ). EH8 was isolated from a microbial biofilm grown in sulfidic-reducing spring water sourced at a Marching's site located downhill from hop cultivation areas with a history of mercury use. A thorough biodiversity survey and mercury-removal function analyses were undertaken in an area of about 200 km 2 in Bavaria (Germany) to find the key biofilm and microbe for mercury removal. After a systematic search using metal removal assays we identified Marching spring's biofilm out of 18 different sulfidic springs' biofilms as the only one that was capable of removing ionic Hg from water. EH8 was selected, due to its molecular biological identification as the key microorganism of this biofilm with the capability of mercury removal, and cultivated as a pure culture on solid and in liquid media to produce germinating sporangiospores. They removed 99% of mercury from water within 10-48 h after initial exposure to Hg(II). Scanning electron microscopy demonstrated occurrence of intracellular mercury in germinating sporangiospores exposed to mercury. Not only associated with intracellular components, but mercury was also found to be released and deposited as metallic-shiny nanospheres. Electron-dispersive x-ray analysis of such a nanosphere confirmed presence of mercury by the HgM α peak at 2.195 keV. Thus, a first aquatic eukaryotic microbe has been found that is able to grow even at low temperature under sulfur-reducing conditions with promising performance in mercury removal to safeguard our environment from mercury pollution. © 2016 The Authors. MicrobiologyOpen published by John Wiley & Sons Ltd.

  11. Heat treatment effect on the properties of the EhP767 maraging steel welded joints

    International Nuclear Information System (INIS)

    Taver, E.I.; Piskarev, M.N.; Yushchenko, K.A.; Pustovit, A.I.; Anisimova, M.S.

    1977-01-01

    Heat treatment effect on properties of welded joints of maraging 03Kh13N4K13M3T (EhP767) steel with yield strength over 150 kgs/mm 2 has been investigated. It is shown, that change in impact strength of aged joints at - 196 deg C depends on the amount of residual austenite and grain size. To stabilize 20-40 % residual austenite heat treatment regimes have been developed. Recommended are quenching at 1030-1050 deg C, sub-zero treatment and aging at 520 deg C for 16 hrs

  12. EH AND S ANALYSIS OF DYE-SENSITIZED PHOTOVOLTAIC SOLAR CELL PRODUCTION

    International Nuclear Information System (INIS)

    BOWERMAN, B.; FTHENAKIS, V.

    2001-01-01

    Photovoltaic solar cells based on a dye-sensitized nanocrystalline titanium dioxide photoelectrode have been researched and reported since the early 1990's. Commercial production of dye-sensitized photovoltaic solar cells has recently been reported in Australia. In this report, current manufacturing methods are described, and estimates are made of annual chemical use and emissions during production. Environmental, health and safety considerations for handling these materials are discussed. This preliminary EH and S evaluation of dye-sensitized titanium dioxide solar cells indicates that some precautions will be necessary to mitigate hazards that could result in worker exposure. Additional information required for a more complete assessment is identified

  13. Simulation of the WWER-440/213 maximum credible accident at the EhNITs stand

    International Nuclear Information System (INIS)

    Blinkov, V.N.; Melikhov, O.I.; Melikhov, V.I.; Davydov, M.V.; Sokolin, A.V.; Shchepetil'nikov, Eh.Yu.

    2000-01-01

    The calculations of thermohydraulic processes through the ATHLET code for determining optimal conditions for modeling the coolant leakage at the EhNITs stand by the maximum credible accident at the NPP with WWER-440/213 reactor are presented. The diameters of the nozzle at the stand, whereby the local criterion of coincidence with the data on the NPP (by the maximum flow) and integral criterion of coincidence (by the mass and energy of the coolant, effluent during 10 s) are determined in the process of parametric calculations [ru

  14. Detection of the Endosomal Sorting Complex Required for Transport in Entamoeba histolytica and Characterization of the EhVps4 Protein

    Directory of Open Access Journals (Sweden)

    Israel López-Reyes

    2010-01-01

    Full Text Available Eukaryotic endocytosis involves multivesicular bodies formation, which is driven by endosomal sorting complexes required for transport (ESCRT. Here, we showed the presence and expression of homologous ESCRT genes in Entamoeba histolytica. We cloned and expressed the Ehvps4 gene, an ESCRT member, to obtain the recombinant EhVps4 and generate specific antibodies, which immunodetected EhVps4 in cytoplasm of trophozoites. Bioinformatics and biochemical studies evidenced that rEhVps4 is an ATPase, whose activity depends on the conserved E211 residue. Next, we generated trophozoites overexpressing EhVps4 and mutant EhVps4-E211Q FLAG-tagged proteins. The EhVps4-FLAG was located in cytosol and at plasma membrane, whereas the EhVps4-E211Q-FLAG was detected as abundant cytoplasmic dots in trophozoites. Erythrophagocytosis, cytopathic activity, and hepatic damage in hamsters were not improved in trophozoites overexpressing EhVps4-FLAG. In contrast, EhVps4-E211Q-FLAG protein overexpression impaired these properties. The localization of EhVps4-FLAG around ingested erythrocytes, together with our previous results, strengthens the role for EhVps4 in E. histolytica phagocytosis and virulence.

  15. EH-GC: An Efficient and Secure Architecture of Energy Harvesting Green Cloud Infrastructure

    Directory of Open Access Journals (Sweden)

    Saurabh Singh

    2017-04-01

    Full Text Available Nowadays, the high power consumption of data centers is the biggest challenge to making cloud computing greener. Many researchers are still seeking effective solutions to reduce or harvest the energy produced at data centers. To address this challenge, we propose a green cloud infrastructure which provides security and efficiency based on energy harvesting (EH-GC. The EH-GC is basically focused on harvesting the heat energy produced by data centers in the Infrastructure-as-a-Service (IaaS infrastructure. A pyroelectric material is used to generate the electric current from heat using the Olsen cycle. In order to achieve efficient green cloud computing, the architecture utilizes a genetic algorithm for proper virtual machine allocation, taking into consideration less Service Level Agreement (SLA violations. The architecture utilizes Multivariate Correlation Analysis (MCA correlation analysis based on a triangular map area generation to detect Denial of Service (DoS attacks in the data center layer of the IaaS. Finally, the experimental analysis is explained based on the energy parameter, which proves that our model is efficient and secure, and that it efficiently reuses the energy emitted from the data center.

  16. Investigating thermomechanical parameters of the EhP693VD heat resisting alloys deformation

    International Nuclear Information System (INIS)

    Garibov, G.S.; Galkin, A.M.; Ermanok, M.Z.; Trepilets, A.E.

    1975-01-01

    The purpose of the present publication consists in complex research of the deformation resistance and plastic characteristics of heat-resistant hard-to-form alloy EhP693VD at the temperatures and deformation rates peculiar for the pressing process. The test conditions are: temperature 1000 to 1200 deg C; rate of deformation 0.5, 5.0 and 25 s -1 . The curves of deformation hardening of alloy EhP693VD show that the alloy is characterized by very high values of forming resistance index Ssub(f). With the increase of the rates of deformation, the maximum of curves Ssub(f) /antiepsilon/ is shifted towards greater degrees of deformation. The increase of the temperature results in the lower deformation hardening of the alloy. The intensity of the growth of the deformation resistance with the decrease of temperature becomes higher at lower degrees of deformation. Variation of plasticity at temperatures of up to 1150 deg C correlates with the curves showing variation of the deformation resistance. At a temperature of 1200 deg C, the drop of the deformation resistance is accompanied by the intensive drop of the plastic characteristics. The planning matrices, test results and complete disperse analysis tables are given. The analysis of the obtained equations makes it possible to draw a conclusion that the rise of the test temperature and drop of the rates of deformation entail the increase of the plastic characteristics

  17. Investigation of Eh, pH and corrosion potential of steel in anoxic groundwater

    Energy Technology Data Exchange (ETDEWEB)

    Peat, R.; Brabon, S.; Fennell, P.A.H.; Rance, A.P.; Smart, N.R. [AEA Technology (United Kingdom)

    2001-01-01

    SKB intend to dispose of the spent nuclear fuel produced by Sweden's eleven nuclear reactors by encapsulating it in corrosion-resistant copper canisters containing a cast iron or carbon steel insert. After encapsulation, the fuel will be transported to a geological repository, where the containers will be deposited at a depth of 500 to 700 m in granitic rock and surrounded by a bentonite clay backfill material. If, or when the copper corrosion shield fails, the iron insert will be in contact with oxygen-free water and hydrogen-producing, anaerobic corrosion will start. SKB have carried out modelling calculations of the oxidising power (Eh) of groundwater and wished to confirm the results by carrying out experimental measurements. The objective of the work described in this report was to demonstrate the feasibility of monitoring Eh, pH and corrosion potential in a cell where anaerobic corrosion of steel in artificial groundwater was occurring. To this end, gas cells similar to those used previously for anaerobic corrosion rate measurements were used as the basis for the design of an electrochemical cell. The cell incorporated electrodes to provide an in situ measurement of the redox potential, Eh, the pH and the corrosion potential of carbon steel. The main stages of the work were: Design of the electrochemical cell; Preparation of silver-silver chloride and calomel reference electrodes; Calibration of the reference electrodes and commercial glass pH electrodes against a standard hydrogen electrode; Assembly of the test cell under anoxic conditions; Monitoring the cell before and after the addition of steel wires to the test solution. Details of the design of the test cell and the experimental procedures used are described. Two cells were set up. The first employed a silver-silver chloride reference electrode, which was failed after approximately 400 hours, and the second cell therefore used a calomel reference electrode. The results of the electrode

  18. Activating mitochondrial function and haemoglobin expression with EH-201, an inducer of erythropoietin in neuronal cells, reverses memory impairment.

    Science.gov (United States)

    Horng, Lin-Yea; Hsu, Pei-Lun; Chen, Li-Wen; Tseng, Wang-Zou; Hsu, Kai-Tin; Wu, Chia-Ling; Wu, Rong-Tsun

    2015-10-01

    Memory impairment can be progressive in neurodegenerative diseases, and physiological ageing or brain injury, mitochondrial dysfunction and oxidative stress are critical components of these issues. An early clinical study has demonstrated cognitive improvement during erythropoietin treatment in patients with chronic renal failure. As erythropoietin cannot freely cross the blood-brain barrier, we tested EH-201 (2,3,5,4'-tetrahydroxystilbene-2-O-β-d-glucoside, also known as TSG), a low MW inducer of erythropoietin, for its therapeutic effects on memory impairment in models of neurodegenerative diseases, physiological ageing or brain injury. The effects of EH-201 were investigated in astrocytes and PC12 neuronal-like cells. In vivo, we used sleep-deprived (SD) mice as a stress model, amyloid-β (Aβ)-injected mice as a physiological ageing model and kainic acid (KA)-injected mice as a brain damage model to assess the therapeutic effects of EH-201. EH-201 induced expression of erythropoietin, PPAR-γ coactivator 1α (PGC-1α) and haemoglobin in astrocytes and PC12 neuronal-like cells. In vivo, EH-201 treatment restored memory impairment, as assessed by the passive avoidance test, in SD, Aβ and KA mouse models. In the hippocampus of mice given EH-201 in their diet, levels of erythropoietin, PGC-1α and haemoglobin were increased The induction of endogenous erythropoietin in neuronal cells by inducers such as EH-201 might be a therapeutic strategy for memory impairment in neurodegenerative disease, physiological ageing or traumatic brain injury. © 2015 The Authors. British Journal of Pharmacology published by John Wiley & Sons Ltd on behalf of The British Pharmacological Society.

  19. Copper corrosion in bentonite: Studying of parameters (pH, Eh/O2) of importance for Cu corrosion

    International Nuclear Information System (INIS)

    Carlsson, T.; Muurinen, A.

    2007-06-01

    The report describes the development of methods and equipment for studying the parameters (pH, Eh/O 2 ) of importance for copper corrosion. The work involved the fabrication of electrodes for determining Eh and pH in compacted water-saturated bentonite. MX-80 and the Indian Asha 505 bentonites were used in the study. The redox-measurements were carried out by using electrodes prepared of Au and Pt wires. The pH measurements were carried out by using solid IrO x electrodes. The report describes testing of electrodes in different solutions and in bentonite. A destructive method for determining oxygen content in compacted bentonite was tested, too. The electrodes were used in measurements inside compacted bentonite with about the same density as is intended to be used in the Finnish repository for spent nuclear fuel. The results indicate that Au and Pt redox-electrodes and IrO x pH electrodes function in compacted bentonite. The oxygen measurement in bentonite seems to work, too, and can complement the Eh measurements. Eh-values in originally aerobic bentonite samples having a dry densitiy of ≤1.5 g/cm 3 , exhibit mostly a decrease during the first days, which may mainly be ascribed to the depletion of oxygen. The Eh-decrease thereafter is probably associated with redox-reactions involving other species than oxygen. In samples with a dry density of 1.8 g/cm 3 , the observed Eh-decrease is mostly slower. No significant difference between the Eh and pH measurements in MX-80 and Asha 505 could be observed. (orig.)

  20. Analysis of Eh Condition and Evolutional Trend of Paddy Soils in a Toposequence

    Directory of Open Access Journals (Sweden)

    javad seyedmohammadi

    2017-02-01

    Full Text Available Introduction: Paddy soils are important and the base of agriculture in Guilan province. It is necessary to recognize these soils for understanding of their limitations and optimum use. Unsaturated soil submerging is the cause of collection of chemical and electrochemical process that has significant effects on soil fertility. Eh, rH and pH are important indexes that are used to investigate oxidation and reduction condition in submerged soils and have abundant effects on activity and sorption rate of nutrients. Decrease of Eh and rH in poorly drainage of paddy soils affects availability and solubility of nutrient. Different Fe forms are used for analysis of soils evolution trend and submerging influences on changes of Fe forms. The aim of the present study was conducted to investigate the effect of redox potential changes on soil characteristics and analysis of soils evolutional trend in different physiographic units. Materials and Methods: The study area with 40000ha (at the east of Rasht city is located between 49° 31' to 49° 45' E longitude and 37° 7' to 37° 27' N latitude in North of Guilan Province, Northern Iran, in the southern coast of the Caspian sea with different water table depth. The climate of the region is very humid with the mean annual precipitation of 1293.6 mm. The mean annual temperature is 15.8°C. The soil moisture and temperature regimes are Aquic, Udicand Thermic, respectively. The parent materials are derived from river sediments. The soils formed on the plateaues and upper terraces, river alluvial plain and lowland physiographic units were classified as Inceptisols and the soils formed on coastal plain physiographic unit as Entisols. Air-dried soil samples were crushed and passed through a 2mm sieve. Particle-size distribution, organic carbon and cation exchange capacity were determined by hydrometric, wet oxidation and ammonium acetate methods, respectively. Eh by Eh electrode, total iron, free iron and amorphous

  1. A protein-binding domain, EH, identified in the receptor tyrosine kinase substrate Eps15 and conserved in evolution

    DEFF Research Database (Denmark)

    Wong, W T; Schumacher, C; Salcini, A E

    1995-01-01

    In this report we structurally and functionally define a binding domain that is involved in protein association and that we have designated EH (for Eps15 homology domain). This domain was identified in the tyrosine kinase substrate Eps15 on the basis of regional conservation with several heteroge......In this report we structurally and functionally define a binding domain that is involved in protein association and that we have designated EH (for Eps15 homology domain). This domain was identified in the tyrosine kinase substrate Eps15 on the basis of regional conservation with several...... heterogeneous proteins of yeast and nematode. The EH domain spans about 70 amino acids and shows approximately 60% overall amino acid conservation. We demonstrated the ability of the EH domain to specifically bind cytosolic proteins in normal and malignant cells of mesenchymal, epithelial, and hematopoietic...... (for Eps15-related). Structural comparison of Eps15 and Eps15r defines a family of signal transducers possessing extensive networking abilities including EH-mediated binding and association with Src homology 3-containing proteins....

  2. Eh-pH diagrams for elements from Z = 40 to Z = 52: application to the Oklo natural reactor, Gabon

    Energy Technology Data Exchange (ETDEWEB)

    Brookins, D G [New Mexico Univ., Albuquerque (USA). Dept. of Geology

    1978-11-01

    Eh-pH diagrams for elements from Z = 40 (Zr) to Z = 52 (Te) have been constructed in order to comment on migration/retention of these elements at Oklo. Although data for fissiogenic amounts of some of these elements are lacking, where such data are available to agreement between predicted migration/retention based on the Eh-pH diagrams and actual measurement is excellent. Based on Eh-pH diagrams, migration (to what degree is uncertain) of Mo and Cd is predicted whereas retention of Y, Zr, Tc, Ru, Rh, Pd, Ag and Te is also predicted. An earlier report of Frejacques et al. of Tc migration is in disagreement with Eh-pH prediction, and recent (unpublished) data argue for Tc retention. In view of the agreement between prediction and observation, the possible migration of Sb and retention of In and Sn is proposed. These data again demonstrate the usefulness of Eh-pH diagrams for the Oklo fossil nuclear reactor but, more important, allow constraints to be placed on repositories for nuclear waste now under consideration.

  3. Managing EHS of PV-Related Equipment at the National Renewable Energy Laboratory: Preprint

    Energy Technology Data Exchange (ETDEWEB)

    McCuskey, T.; Nelson, B. P.

    2012-06-01

    Managing environment, health, and safety (EHS) risks at a national laboratory, or university, can be intimidating to a researcher who is focused on research results. Laboratory research and development (R&D) operations are often driven by scientists with limited engineering support and lack well-refined equipment development resources. To add to the burden for a researcher, there is a plethora of codes, standards, and regulations that govern the safe installation and operation of photovoltaic-related R&D equipment -- especially those involving hazardous production materials. To help guide the researcher through the vast list of requirements, the EHS office at NREL has taken a variety of steps. Organizationally, the office has developed hazard-specific laboratory-level procedures to govern particular activities. These procedures are a distillation of appropriate international codes, fire agencies, SEMI standards, U.S. Department of Energy orders, and other industry standards to those necessary and sufficient to govern the safe operation of a given activity. The EHS office works proactively with researchers after a concept for a new R&D capability is conceived to help guide the safe design, acquisition, installation, and operation of the equipment. It starts with a safety assessment at the early stages such that requirements are implemented to determine the level of risk and degree of complexity presented by the activity so appropriate controls can be put in place to manage the risk. As the equipment requirements and design are refined, appropriate equipment standards are applied. Before the 'to-build' specifications are finalized, a process hazard analysis is performed to ensure that no single-point failure presents an unacceptable risk. Finally, as the tool goes through construction and installation stages, reviews are performed at logical times to ensure that the requisite engineering controls and design are in place and operational. Authorization to

  4. High statistics study of $\\bar{p}p$ annihilation physics at the EHS

    CERN Multimedia

    2002-01-01

    We propose to perform an experiment to study antiproton-proton annihilations at 50 GeV/c, using the EHS facility.\\\\ \\\\ We will study in detail annihilation processes in terms of the underlying quark structure, and to compare our results with the predictions of the three principal models: quark fusion, fragmentation and recombination.\\\\ \\\\ These models achieved satisfactory results for pion and non-strange resonance production but failed for strange particle production. In fact a study of the production of strange particles could lead to valuable dues in understanding the annihilation mechanisms. A possible explanation of their production is that fast gluons materialize as strange quark pairs in the annihilation process. \\\\ \\\\ We expect to obtain 35 K, well identified, annihilation events.

  5. Communication on SWIPT and EH Using Electromagnetic Behaviour for Power Allocation in Wireless Networks

    Science.gov (United States)

    Khan, Sohel Rana; Ajij, Sayyad

    2017-12-01

    This review paper focuses on the basic relations between wireless power transfer, wireless information transfer and combined phenomenon of simultaneous wireless information and power transfer. The authors reviewed and discussed electromagnetic fields behaviour (EMB) for enhancing the power allocation strategies (PAS) in energy harvesting (EH) wireless communication systems. Further, this paper presents relations between Friis transmission equation and Maxwell's equations to be used in propagation models for reduction in specific absorption rate (SAR). This paper provides a review of various methods and concepts reported in earlier works. This paper also reviews Poynting vector and power densities along with boundary conditions for antennas and human body. Finally, this paper explores the usage of electromagnetic behaviour for the possible enhancement in power saving methods for electromagnetic behaviour centered-wireless energy harvesting (EMBC-WEH). At the same time, possibilities of PAS for reduction in SAR are discussed.

  6. Integrating life cycle assessment into managing potential EHS risks of engineered nanomaterials: reviewing progress to date

    International Nuclear Information System (INIS)

    Walker, William C.; Bosso, Christopher J.; Eckelman, Matthew; Isaacs, Jacqueline A.; Pourzahedi, Leila

    2015-01-01

    The 2011 National Nanotechnology Initiative’s Environmental Health and Safety Research Strategy stressed the need for research to integrate life cycle considerations into risk management and, then, to better integrate risk assessment into decisionmaking on environmental, health, and safety (EHS) dimensions of nanomanufacturing. This paper reviews scholarly articles published 2010–2015 that in some way apply life cycle analysis to nanotechnology to assess the extent to which current research reflects the priorities lain out in the NNI report. As the NNI’s focus was primarily on the “responsible development of nanotechnology” we also focus our examination on the ways in which LCA, in concert with other methodologies, can provide utility to decision makers facing the challenge of implementing that broad goal. We explore some of the challenges and opportunities inherent in using LCA, a tool built to optimize manufacturing decisions, as a guide for policy formulation or tool for policy implementation

  7. Integrating life cycle assessment into managing potential EHS risks of engineered nanomaterials: reviewing progress to date

    Energy Technology Data Exchange (ETDEWEB)

    Walker, William C.; Bosso, Christopher J., E-mail: c.bosso@neu.edu [Northeastern University, School of Public Policy and Urban Affairs (United States); Eckelman, Matthew [Northeastern University, Department of Civil and Environmental Engineering (United States); Isaacs, Jacqueline A. [Northeastern University, Department of Mechanical and Industrial Engineering (United States); Pourzahedi, Leila [Northeastern University, Department of Civil and Environmental Engineering (United States)

    2015-08-15

    The 2011 National Nanotechnology Initiative’s Environmental Health and Safety Research Strategy stressed the need for research to integrate life cycle considerations into risk management and, then, to better integrate risk assessment into decisionmaking on environmental, health, and safety (EHS) dimensions of nanomanufacturing. This paper reviews scholarly articles published 2010–2015 that in some way apply life cycle analysis to nanotechnology to assess the extent to which current research reflects the priorities lain out in the NNI report. As the NNI’s focus was primarily on the “responsible development of nanotechnology” we also focus our examination on the ways in which LCA, in concert with other methodologies, can provide utility to decision makers facing the challenge of implementing that broad goal. We explore some of the challenges and opportunities inherent in using LCA, a tool built to optimize manufacturing decisions, as a guide for policy formulation or tool for policy implementation.

  8. Elimination of ion losses in the EhGP-10-1 charge-exchange accelerator

    International Nuclear Information System (INIS)

    Fridrikh, M.

    1986-01-01

    To improve the ion transit factor in the EhGP-10-1 charge-exchange accelerator the injector ion-optical properties are studied. The injector operates at constant high voltage U a -23 kV. Using an immersion lens the negative ion energy before entering the accelerating tube is increased up to energy proportional to the conductor voltage. A single electrostatic lens provides a cross-over in the vicinity of immersion lens. By reducing the electric field gradient at the accelerating tube inlet, optimizing input electrode voltage and shifting the single lens by 0.26 m towards the accelerating tube inlet almost full beam transit is attained at all conductor voltages

  9. Conference Scene: epigenetics eh! The first formal meeting of the Canadian epigenetics community.

    Science.gov (United States)

    Underhill, Alan; Hendzel, Michael J

    2011-08-01

    In recognition of Canada's longstanding interest in epigenetics - and a particular linguistic interjection - the inaugural 'Epigenetics, Eh!' conference was held between 4-7 May 2011 in London, Ontario. The meeting struck an excellent balance between Canadian and international leaders in epigenetic research while also providing a venue to showcase up-and-coming talent. Almost without exception, presentations touched on the wide-ranging and severe consequences of epigenetic dysfunction, as well as current and emerging therapeutic opportunities. While gaining a deeper understanding of how DNA and histone modifications, together with multiple classes of ncRNAs, act to functionalize our genome, participants were also provided with a glimpse of the astounding complexity of chromatin structure, challenging existing dogma.

  10. Epigenetics, eh! A meeting summary of the Canadian Conference on Epigenetics.

    Science.gov (United States)

    Rodenhiser, David I; Bérubé, Nathalie G; Mann, Mellissa R W

    2011-10-01

    In May 2011, the Canadian Conference on Epigenetics: Epigenetics Eh! was held in London, Canada. The objectives of this conference were to showcase the breadth of epigenetic research on environment and health across Canada and to provide the catalyst to develop collaborative Canadian epigenetic research opportunities, similar to existing international epigenetic initiatives in the US and Europe. With ten platform sessions and two sessions with over 100 poster presentations, this conference featured cutting-edge epigenetic research, presented by Canadian and international principal investigators and their trainees in the field of epigenetics and chromatin dynamics. An EpigenART competition included ten artists, creating a unique opportunity for artists and scientists to interact and explore their individual interpretations of this scientific discipline. The conference provided a unique venue for a significant cross-section of Canadian epigenetic researchers from diverse disciplines to meet, interact, collaborate and strategize at the national level.

  11. Food Allergy Knowledge and Attitudes of Restaurant Managers and Staff: An EHS-Net Study

    Science.gov (United States)

    Radke, Taylor J.; Brown, Laura G.; Hoover, E. Rickamer; Faw, Brenda V.; Reimann, David; Wong, Melissa R.; Nicholas, David; Barkley, Jonathan; Ripley, Danny

    2016-01-01

    Dining outside of the home can be difficult for persons with food allergies who must rely on restaurant staff to properly prepare allergen-free meals. The purpose of this study was to understand and identify factors associated with food allergy knowledge and attitudes among restaurant managers, food workers, and servers. This study was conducted by the Environmental Health Specialists Network (EHS-Net), a collaborative forum of federal, state, and local environmental health specialists working to understand the environmental factors associated with food safety issues. EHS-Net personnel collected data from 278 randomly selected restaurants through interviews with restaurant managers, food workers, and servers. Results indicated that managers, food workers, and servers were generally knowledgeable and had positive attitudes about accommodating customers’ food allergies. However, we identified important gaps, such as more than 10% of managers and staff believed that a person with a food allergy can safely consume a small amount of that allergen. Managers and staff also had lower confidence in their restaurant’s ability to properly respond to a food allergy emergency. The knowledge and attitudes of all groups were higher at restaurants that had a specific person to answer food allergy questions and requests or a plan for answering questions from food allergic customers. However, food allergy training was not associated with knowledge in any of the groups but was associated with manager and server attitudes. Based on these findings, we encourage restaurants to be proactive by training staff about food allergies and creating plans and procedures to reduce the risk of a customer having a food allergic reaction. PMID:28221943

  12. Food Allergy Knowledge and Attitudes of Restaurant Managers and Staff: An EHS-Net Study.

    Science.gov (United States)

    Radke, Taylor J; Brown, Laura G; Hoover, E Rickamer; Faw, Brenda V; Reimann, David; Wong, Melissa R; Nicholas, David; Barkley, Jonathan; Ripley, Danny

    2016-09-01

    Dining outside of the home can be difficult for persons with food allergies who must rely on restaurant staff to properly prepare allergen-free meals. The purpose of this study was to understand and identify factors associated with food allergy knowledge and attitudes among restaurant managers, food workers, and servers. This study was conducted by the Environmental Health Specialists Network (EHS-Net), a collaborative forum of federal, state, and local environmental health specialists working to understand the environmental factors associated with food safety issues. EHS-Net personnel collected data from 278 randomly selected restaurants through interviews with restaurant managers, food workers, and servers. Results indicated that managers, food workers, and servers were generally knowledgeable and had positive attitudes about accommodating customers' food allergies. However, we identified important gaps, such as more than 10% of managers and staff believed that a person with a food allergy can safely consume a small amount of that allergen. Managers and staff also had lower confidence in their restaurant's ability to properly respond to a food allergy emergency. The knowledge and attitudes of all groups were higher at restaurants that had a specific person to answer food allergy questions and requests or a plan for answering questions from food allergic customers. However, food allergy training was not associated with knowledge in any of the groups but was associated with manager and server attitudes. Based on these findings, we encourage restaurants to be proactive by training staff about food allergies and creating plans and procedures to reduce the risk of a customer having a food allergic reaction.

  13. Practical improvements in soil redox potential (Eh) measurement for characterisation of soil properties. Application for comparison of conventional and conservation agriculture cropping systems

    Energy Technology Data Exchange (ETDEWEB)

    Husson, Olivier, E-mail: Olivier.husson@cirad.fr [CIRAD/PERSYST/UPR 115 AIDA and AfricaRice Centre, 01 BP 2031 Cotonou (Benin); Husson, Benoit, E-mail: bhusson@ideeaquaculture.com [IDEEAQUACULTURE, Parc Euromédecine 2, 39 Rue Jean Giroux, 34080 Montpellier (France); Brunet, Alexandre, E-mail: brunet.alexandre@outlook.com [CIRAD/US 49 Analyse, Avenue Agropolis, TA B-49/01, 34398 Montpellier Cedex (France); Babre, Daniel, E-mail: Daniel.babre@cirad.fr [CIRAD/US 49 Analyse, Avenue Agropolis, TA B-49/01, 34398 Montpellier Cedex (France); Alary, Karine, E-mail: Karine.alary@cirad.fr [CIRAD/US 49 Analyse, Avenue Agropolis, TA B-49/01, 34398 Montpellier Cedex (France); Sarthou, Jean-Pierre, E-mail: sarthou@ensat.fr [ENSAT/INRA/INP UMR AGIR. BP 52627, Chemin de Borde Rouge, 31326 Castanet-Tolosan Cedex (France); Charpentier, Hubert, E-mail: Charpentier.hub@wanadoo.fr [La Boisfarderie, Brives 36100 (France); Durand, Michel, E-mail: earldeslacs@orange.fr [Le Cazals, Castanet 81 150 (France); Benada, Jaroslav, E-mail: benada@vukrom.cz [Agrotest fyto, Kromeriz Institute, Havlíckova 2787, 76701 Kromeriz (Czech Republic); Henry, Marc, E-mail: henry@unistra.fr [UMR CNRS/UdS 7140, Université de Strasbourg, Institut Le Bel, 4, rue Blaise Pascal, CS 90032, Strasbourg 67081 (France)

    2016-02-04

    The soil redox potential (Eh) can provide essential information to characterise soil conditions. In practice, however, numerous problems may arise regarding: (i) Eh determination in soils, especially aerobic soils, e.g. variations in the instrumentation and methodology for Eh measurement, high spatial and temporal Eh variability in soils, irreversibility of the redox reaction at the surface electrode, chemical disequilibrium; and (ii) measurement interpretation. This study aimed at developing a standardised method for redox potential measurement in soils, in order to use Eh as a soil quality indicator. This paper presents practical improvements in soil Eh measurement, especially regarding the control of electromagnetic perturbations, electrode choice and preparation, soil sample preparation (drying procedure) and soil:water extraction rate. The repeatability and reproducibility of the measurement method developed are highlighted. The use of Eh corrected at pH7, pe+pH or rH{sub 2}, which are equivalent notions, is proposed to facilitate interpretation of the results. The application of this Eh measurement method allows characterisation of soil conditions with sufficient repeatability, reproducibility and accuracy to demonstrate that conservation agriculture systems positively alter the protonic and electronic balance of soil as compared to conventional systems. - Highlights: • Electromagnetic fields can dramatically perturb soil Eh measurement. • Our method overcomes the main difficulties in soil Eh measurement. • Accurate and reproducible measurement of mean soil Eh are achieved. • Eh{sub pH7}, pe+pH and rH{sub 2} are equivalent notions characterising electron activity. • Agricultural practices alter soil protonic and electronic characteristics.

  14. Rate Maximization in MIMO Decode-and-Forward Communications With an EH Relay and Possibly Imperfect CSI

    KAUST Repository

    Benkhelifa, Fatma; Salem, Ahmed Sultan; Alouini, Mohamed-Slim

    2016-01-01

    In this paper, we investigate the simultaneous wireless information and power transfer (SWIPT) in a multiple-input multiple-output (MIMO) decode-and-forward (DF) relay system where the relay is an energy harvesting (EH) multi-antenna node equipped

  15. Rate Maximization in MIMO Decode-and-Forward Communications With an EH Relay and Possibly Imperfect CSI

    KAUST Repository

    Benkhelifa, Fatma

    2016-08-29

    In this paper, we investigate the simultaneous wireless information and power transfer (SWIPT) in a multiple-input multiple-output (MIMO) decode-and-forward (DF) relay system where the relay is an energy harvesting (EH) multi-antenna node equipped with an EH receiver and an information decoding (ID) receiver. The relay harvests the energy from the radio frequency (RF) signals sent by the source and uses it to forward the signals to the destination. The main objective in this paper is to maximize the achievable transmission rate of the overall link by optimizing the source/relay precoders. First, we study an upper bound on the maximum achievable rate where we assume that the EH and ID receivers operate simultaneously and have access to the whole power of the received signals. Afterwards, we study two practical schemes, which are the power splitting (PS) and time switching (TS) schemes, where the ID and EH receivers have partial access to the power or duration of the received signals. For each scheme, we have studied the complexity and the performance comparison. In addition, we considered the case of the imperfect channel estimation error and we have observed its impact on the achievable end-to-end rate and the harvested energy at the relay. © 1972-2012 IEEE.

  16. 76 FR 41262 - Notice of Intent To Award Affordable Care Act (ACA) Funding, EH11-1103

    Science.gov (United States)

    2011-07-13

    ...,000 in ACA funding will be awarded to the grantees for network expansion and enhancement. Funding is... Intent To Award Affordable Care Act (ACA) Funding, EH11-1103 Notice of Intent to award Affordable Care Act (ACA) funding to seventeen states and local health departments to develop and implement tracking...

  17. 76 FR 41261 - Notice of Intent To Award Affordable Care Act (ACA) Funding, EH10-1003

    Science.gov (United States)

    2011-07-13

    ...): 93.070. Approximately $124,995.00 in ACA funding will be awarded to the grantee for network expansion... Intent To Award Affordable Care Act (ACA) Funding, EH10-1003 Notice of Intent to award Affordable Care Act (ACA) funding to National Association for Health Data Organizations (NAHDO) to continue with the...

  18. 76 FR 41263 - Notice of Intent To Award Affordable Care Act (ACA) Funding, EH10-1004

    Science.gov (United States)

    2011-07-13

    ... $125,000.00 in ACA funding will be awarded to the grantee for network expansion and enhancement... Intent To Award Affordable Care Act (ACA) Funding, EH10-1004 Notice of Intent to award Affordable Care Act (ACA) funding to National Association for Public Health Statistics and Information Systems...

  19. Use of Pourbaix diagrams and the eH and pH measurements in hydrometallurgy. Part 2-Applications

    International Nuclear Information System (INIS)

    Teixeira, L.A.C.

    1987-01-01

    The interpretation of Pourbaix diagrams, presenting as examples; acid lixiviation of uranium ore, iron ion removal from process solutions, lixiviation of copper ores and cyaniding of Au ores containing Cu and Fe is presented. Practical aspects on eH and pH measurement in solutions of hydrometallurgical process. (M.C.K.) [pt

  20. Study of diffractive dissociation especially into strange and charmed particles with EHS

    CERN Multimedia

    2002-01-01

    The diffractive production of heavy quark-antiquark pairs leading to strangeness-antistrangeness and charm-anticharm systems is intended to be measured in this experiment. The use of the rapid cycling bubble chamber (RCBC) with a volume of 100 x 40 x 40 cm$^{3}$ and a picture taking rate of 15 Hz as vertex detector and EHS as forward spectrometer is suitable for the first step of this physics programme. Inclusive cross-sections for diffraction dissociation into $s\\bar{s}$ are lacking whereas diffractive $c\\bar{c}$ production is already better known. The gain of more insight into the mechanism of heavy quark-antiquark production, exclusive diffractive reactions with $\\pi^{0}$'s, diffractive resonance production and also the extraction of data for the double Pomeron exchange mechanism are envisaged. \\\\\\\\ This experiment will be run in two parts, the first one recording the entire unbiased sample of $pp$ and $\\pi^{-}p$ interactions, the second however using triggering for beam and high mass target diffraction di...

  1. The JRC Nanomaterials Repository: A unique facility providing representative test materials for nanoEHS research.

    Science.gov (United States)

    Totaro, Sara; Cotogno, Giulio; Rasmussen, Kirsten; Pianella, Francesca; Roncaglia, Marco; Olsson, Heidi; Riego Sintes, Juan M; Crutzen, Hugues P

    2016-11-01

    The European Commission has established a Nanomaterials Repository that hosts industrially manufactured nanomaterials that are distributed world-wide for safety testing of nanomaterials. In a first instance these materials were tested in the OECD Testing Programme. They have then also been tested in several EU funded research projects. The JRC Repository of Nanomaterials has thus developed into serving the global scientific community active in the nanoEHS (regulatory) research. The unique Repository facility is a state-of-the-art installation that allows customised sub-sampling under the safest possible conditions, with traceable final sample vials distributed world-wide for research purposes. This paper describes the design of the Repository to perform a semi-automated subsampling procedure, offering high degree of flexibility and precision in the preparation of NM vials for customers, while guaranteeing the safety of the operators, and environmental protection. The JRC nanomaterials are representative for part of the world NMs market. Their wide use world-wide facilitates the generation of comparable and reliable experimental results and datasets in (regulatory) research by the scientific community, ultimately supporting the further development of the OECD regulatory test guidelines. Copyright © 2016 The Authors. Published by Elsevier Inc. All rights reserved.

  2. Laboratory Eh simulations in relation to the Redox conditions in natural granitic groundwaters

    International Nuclear Information System (INIS)

    Wikberg, P.

    1992-01-01

    Redox conditions are one of the prime parameters affecting the sorption of radionuclides released from a nuclear waste repository. The swedish granitic groundwaters are all reducing from a depth of approximately 100 m, the vast majority already from a depth of a few tens of metres. The contents of ferrous iron reaches a maximum at the same depth due to the weathering of iron rich minerals. At greater depths the iron content decreases while sulphide contents increases. The redox buffering capacity (in groundwater) lies mainly in the rock. The contents of iron, sulphide and manganese constitute the buffer in the groundwater. The redox potential (Eh) is controlled by the iron system in the groundwater and the rock. Sulphate is not involved in the groundwater redox processes. Laboratory simulations of the groundwater rock interactions with respect to the redox conditions have been realized, but there is still a difference compared to the natural system. This difference is due to the fact that traces of oxygen diffuses into the laboratory system causing a continuous oxidation. 20 refs., 4 figs., 1 tab

  3. LEW 88180, LEW 87119, and ALH 85119: New EH6, EL7, and EL4 Enstatite Chondrites

    Science.gov (United States)

    Zhang, Y.; Benoit, P. H.; Sears, D. W. G.

    1993-07-01

    The EH and EL chondrites formed in a uniquely reducing environment, containing low-Fe pyroxene, abundant metal, and a number of unusual sulphides and other minerals [1]. An important aspect of their history is that while the EL chondrites consist predominantly of metamorphosed meteorites, the EH consist primarily of little-metamorphosed meteorites (e.g., [2]), and yet EL chondrites have lower equilibrium temperatures than EH chondrite [3,4]. To help understand this observation and its implication for the history of the classes, we have been searching for new enstatite chondrites, looking especially for meteorites of previously unknown chemical-petrologic class. Using our normal INAA methods [5] and sample splits of 100-200 mg, the bulk composition of nine Antarctic enstatite chondrites and one fall were determined. The data were used to assign the meteorites to chemical classes, the Ni/Ir vs. Al/V plot (Fig. 1) being especially useful since it uses the refractory element difference between EH and EL chondrites and is insensitive to metal-silicate heterogeneity. The well-analyzed Qingzhen was included to check our method. ALH84170, ALH84206, and EET87746, which Mason described as E3, E4, and E4 were all found to be EH chondrites [6]. Our data for the three paired EL3 chondrites were discussed earlier (MAC88136, 88180, and 88184) [7,8]. LEW88180, LEW87119, and ALH85119, which Mason described as type E6, E6, and E4 respectively [6], are EH, EL, and EL; thus LEW88180 and ALH85119 appear to be the first EH6 and EL4 chondrites. The compositions of kamacite, phosphide, and niningerite-alabandite (Fig. 2) for ALH84170, ALH84206, EET87746, LEW88180, and ALH85119 are consistent with Mason's petrologic type assignments [6]. The mineral composition of LEW88180 (2.7% Si and 9.4% Ni in the kamacite, 7.8% Ni in the phosphide, and 60% FeS in the niningerite) confirms our classification of this meteorite as EH6. ALH85119 contains kamacite with 0.5% Si and 7% Ni, phosphide with 46

  4. Entamoeba histolytica EhCP112 Dislocates and Degrades Claudin-1 and Claudin-2 at Tight Junctions of the Intestinal Epithelium

    Directory of Open Access Journals (Sweden)

    Patricia Cuellar

    2017-08-01

    Full Text Available During intestinal invasion, Entamoeba histolytica opens tight junctions (TJs reflected by transepithelial electrical resistance (TEER dropping. To explore the molecular mechanisms underlying this, we studied in vitro and in vivo the damage produced by the recombinant E. histolytica cysteine protease (rEhCP112 on TJ functions and proteins. rEhCP112 reduced TEER in Caco-2 cells in a dose- and time-dependent manner; and EhCP112-overexpressing trophozoites provoked major epithelial injury compared to control trophozoites. rEhCP112 penetrated through the intercellular space, and consequently the ion flux increased and the TJs fence function was disturbed. However, macromolecular flux was not altered. Functional in vitro assays revealed specific association of rEhCP112 with claudin-1 and claudin-2, that are both involved in regulating ion flux and fence function. Of note, rEhCP112 did not interact with occludin that is responsible for regulating macromolecular flux. Moreover, rEhCP112 degraded and delocalized claudin-1, thus affecting interepithelial adhesion. Concomitantly, expression of the leaky claudin-2 at TJ, first increased and then it was degraded. In vivo, rEhCP112 increased intestinal epithelial permeability in the mouse colon, likely due to apical erosion and claudin-1 and claudin-2 degradation. In conclusion, we provide evidence that EhCP112 causes epithelial dysfunction by specifically altering claudins at TJ. Thus, EhCP112 could be a potential target for therapeutic approaches against amoebiasis.

  5. Ab initio calculations of scattering cross sections of the three-body system (p ¯,e+,e- ) between the e-+H ¯(n =2 ) and e-+H ¯(n =3 ) thresholds

    Science.gov (United States)

    Valdes, Mateo; Dufour, Marianne; Lazauskas, Rimantas; Hervieux, Paul-Antoine

    2018-01-01

    The ab initio method based on the Faddeev-Merkuriev equations is used to calculate cross sections involving the (p ¯,e+,e-) three-body system, with an emphasis on antihydrogen formation (H ¯) via antiproton (p ¯) scattering on positronium. This system is studied in the energy range between the e-+H ¯(n =2 ) and the e-+H ¯(n =3 ) thresholds, where precisely calculated cross sections can be useful for future experiments (GBAR, AEGIS, etc.) aiming to produce antihydrogen atoms. A special treatment is developed to take into account the long-range charge-dipole interaction effect on the wave function. Emphasis is placed on the impact of Feshbach resonances and Gailitis-Damburg oscillations appearing in the vicinity of the p ¯+Ps (n =2 ) threshold.

  6. THE FIRST DISCOVERY OF PRESOLAR GRAPHITE GRAINS FROM THE HIGHLY REDUCING QINGZHEN (EH3) METEORITE

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Yuchen; Lin, Yangting; Zhang, Jianchao; Hao, Jialong, E-mail: linyt@mail.iggcas.ac.cn [Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029 (China)

    2016-07-10

    Presolar graphite grains have been extensively studied, but are limited in carbonaceous chondrites, particularly in Murchison (CM2) and Orgueil (CI1), which sampled materials from the oxidizing regions in the solar nebula. Here, we report the first discovery of presolar graphite grains from the Qingzhen (EH3) enstatite chondrite which formed under a highly reducing condition. Eighteen presolar graphite grains were identified by C-isotope mapping of the low-density fraction (1.75–1.85 g cm{sup 3}) from Qingzhen acid residue. Another 58 graphite spherules were found in different areas of the same sample mount using a scanning electron microscope and were classified into three morphologies, including cauliflower, onion, and cauliflower–onion. The Raman spectra of these spherules vary from ordered, disordered, and glassy to kerogen-like, suggestive of a wide range of thermal metamorphisms. NanoSIMS analysis of the C- and Si-isotopes of these graphite spherules confirmed 23 presolar grains. The other 35 graphite spherules have no significant isotopic anomalies, but they share similar morphologies and Raman spectra with the presolar ones. Another three grains were identified during NanoSIMS analysis. Of all the 44 presolar graphite grains identified, six grains show {sup 28}Si-excesses, suggestive of supernovae origins, and four grains are {sup 12}C- and {sup 29,30}Si-rich, consistent with low-metallicity asymptotic giant branch star origins. Another two graphite spherules have extremely low {sup 12}C/{sup 13}C ratios with marginal solar Si-isotopes. The morphologies, Raman spectra, and C- and Si-isotopic distributions of the presolar graphite grains from the Qingzhen enstatite chondrite are similar to those of the low-density fractions from Murchison carbonaceous chondrites. This study suggests a homogeneous distribution of presolar graphite grains in the solar nebula.

  7. THE FIRST DISCOVERY OF PRESOLAR GRAPHITE GRAINS FROM THE HIGHLY REDUCING QINGZHEN (EH3) METEORITE

    International Nuclear Information System (INIS)

    Xu, Yuchen; Lin, Yangting; Zhang, Jianchao; Hao, Jialong

    2016-01-01

    Presolar graphite grains have been extensively studied, but are limited in carbonaceous chondrites, particularly in Murchison (CM2) and Orgueil (CI1), which sampled materials from the oxidizing regions in the solar nebula. Here, we report the first discovery of presolar graphite grains from the Qingzhen (EH3) enstatite chondrite which formed under a highly reducing condition. Eighteen presolar graphite grains were identified by C-isotope mapping of the low-density fraction (1.75–1.85 g cm 3 ) from Qingzhen acid residue. Another 58 graphite spherules were found in different areas of the same sample mount using a scanning electron microscope and were classified into three morphologies, including cauliflower, onion, and cauliflower–onion. The Raman spectra of these spherules vary from ordered, disordered, and glassy to kerogen-like, suggestive of a wide range of thermal metamorphisms. NanoSIMS analysis of the C- and Si-isotopes of these graphite spherules confirmed 23 presolar grains. The other 35 graphite spherules have no significant isotopic anomalies, but they share similar morphologies and Raman spectra with the presolar ones. Another three grains were identified during NanoSIMS analysis. Of all the 44 presolar graphite grains identified, six grains show 28 Si-excesses, suggestive of supernovae origins, and four grains are 12 C- and 29,30 Si-rich, consistent with low-metallicity asymptotic giant branch star origins. Another two graphite spherules have extremely low 12 C/ 13 C ratios with marginal solar Si-isotopes. The morphologies, Raman spectra, and C- and Si-isotopic distributions of the presolar graphite grains from the Qingzhen enstatite chondrite are similar to those of the low-density fractions from Murchison carbonaceous chondrites. This study suggests a homogeneous distribution of presolar graphite grains in the solar nebula.

  8. Serum-dependent selective expression of EhTMKB1-9, a member of Entamoeba histolytica B1 family of transmembrane kinases.

    Directory of Open Access Journals (Sweden)

    Shiteshu Shrimal

    Full Text Available Entamoeba histolytica transmembrane kinases (EhTMKs can be grouped into six distinct families on the basis of motifs and sequences. Analysis of the E. histolytica genome revealed the presence of 35 EhTMKB1 members on the basis of sequence identity (>or=95%. Only six homologs were full length containing an extracellular domain, a transmembrane segment and an intracellular kinase domain. Reverse transcription followed by polymerase chain reaction (RT-PCR of the kinase domain was used to generate a library of expressed sequences. Sequencing of randomly picked clones from this library revealed that about 95% of the clones were identical with a single member, EhTMKB1-9, in proliferating cells. On serum starvation, the relative number of EhTMKB1-9 derived sequences decreased with concomitant increase in the sequences derived from another member, EhTMKB1-18. The change in their relative expression was quantified by real time PCR. Northern analysis and RNase protection assay were used to study the temporal nature of EhTMKB1-9 expression after serum replenishment of starved cells. The results showed that the expression of EhTMKB1-9 was sinusoidal. Specific transcriptional induction of EhTMKB1-9 upon serum replenishment was further confirmed by reporter gene (luciferase expression and the upstream sequence responsible for serum responsiveness was identified. EhTMKB1-9 is one of the first examples of an inducible gene in Entamoeba. The protein encoded by this member was functionally characterized. The recombinant kinase domain of EhTMKB1-9 displayed protein kinase activity. It is likely to have dual specificity as judged from its sensitivity to different kinase inhibitors. Immuno-localization showed EhTMKB1-9 to be a surface protein which decreased on serum starvation and got relocalized on serum replenishment. Cell lines expressing either EhTMKB1-9 without kinase domain, or EhTMKB1-9 antisense RNA, showed decreased cellular proliferation and target cell

  9. Iron and manganese in oxide minerals and in glasses: preliminary consideration of Eh buffering potential at Yucca Mountain, Nevada

    International Nuclear Information System (INIS)

    Caporuscio, F.A.; Vaniman, D.T.

    1985-04-01

    The tuffs of Yucca Mountain at the Nevada Test Site are currently under investigation as a possible deep burial site for high-level radioactive waste disposal. One of the main concerns is the effect of oxidizing groundwater on the transport of radionuclides. Rock components that may affect the oxygen content of groundwater include Fe-Ti oxides, Mn oxides, and glasses that contain ferrous iron. Some phenocryst Fe-Ti oxides at Yucca Mountain are in reduced states, whereas groundmass Fe-Ti oxides have been oxidized to hematite, rutile, and pseudobrookite (Fe 3+ -bearing phases) exclusively. Estimates of Fe 2+ -bearing oxides indicate that less than 0.33 vol% phenocrysts is available to act as solid buffering agents of Eh. Of this percentage, significant amounts of Fe-Ti oxides are isolated from effective interaction with groundwater because they occur in densely welded, devitrified tuffs that have low interstitial permeability. Manganese oxides occur primarily along fractures in the ash-flow tuffs. Because the Mn oxides are concentrated along the same pathways (fractures) where transport has occurred in the past, these small volume percentages could act as buffers. However, the oxidation states of actual Mn-oxide phases are high (Mn 4+ ), and these minerals have virtually no potential for reducing groundwater Eh. Manganese oxides may even act as oxidizing agents. However, regardless of their poor capabilities as reducing agents, the Mn oxides could be important as sorbents of heavy metals at Yucca Mountain. The lack of accessible, pristine Fe-Ti oxides and the generally high oxidation states of Mn oxides seem to rule out these oxides as Eh buffers of the Yucca Mountain groundwater system. Reduction of ferrous iron within glassy tuffs may have some effect on Eh, but further study is needed. At present it is prudent to assume that minerals and glasses have little or no capacity for reducing oxygen-rich groundwater at Yucca Mountain. 25 refs., 3 figs., 12 tabs

  10. Activating mitochondrial function and haemoglobin expression with EH-201, an inducer of erythropoietin in neuronal cells, reverses memory impairment

    OpenAIRE

    Horng, Lin-Yea; Hsu, Pei-Lun; Chen, Li-Wen; Tseng, Wang-Zou; Hsu, Kai-Tin; Wu, Chia-Ling; Wu, Rong-Tsun

    2015-01-01

    Background and Purpose Memory impairment can be progressive in neurodegenerative diseases, and physiological ageing or brain injury, mitochondrial dysfunction and oxidative stress are critical components of these issues. An early clinical study has demonstrated cognitive improvement during erythropoietin treatment in patients with chronic renal failure. As erythropoietin cannot freely cross the blood?brain barrier, we tested EH-201 (2,3,5,4?-tetrahydroxystilbene-2-O-?-d-glucoside, also known ...

  11. Introduction to Nanotechnology for Defense Environment, Health & Safety (EHS) and Research Professionals in Support of the Acquisition Process

    Science.gov (United States)

    2011-03-28

    www.denix.osd.mil/MERIT Ultra fine particles ~50 1713- Ramazzini described black 197 4- First GMO lung disease mouse created by Jaenisch Diesel...exhaust Engineered NP _____ _,.? • GMO Technology 1985- Oberdorster described inhalation toxicity of Ti02 2003-lssue recognized by EPA, NIOSH...other agencies 2004- California pass broad ban on GMO products Growing Body of EHS Research Far-reaching implications or singular exceptions

  12. How can nanobiotechnology oversight advance science and industry: examples from environmental, health, and safety studies of nanoparticles (nano-EHS)

    International Nuclear Information System (INIS)

    Wang Jing; Asbach, Christof; Fissan, Heinz; Hülser, Tim; Kuhlbusch, Thomas A. J.; Thompson, Drew; Pui, David Y. H.

    2011-01-01

    Nanotechnology has great potential to transform science and industry in the fields of energy, material, environment, and medicine. At the same time, more concerns are being raised about the occupational health and safety of nanomaterials in the workplace and the implications of nanotechnology on the environment and living systems. Studies on environmental, health, and safety (EHS) issues of nanomaterials have a strong influence on public acceptance of nanotechnology and, eventually, affect its sustainability. Oversight and regulation by government agencies and non-governmental organizations (NGOs) play significant roles in ensuring responsible and environmentally friendly development of nanotechnology. The EHS studies of nanomaterials can provide data and information to help the development of regulations and guidelines. We present research results on three aspects of EHS studies: physico-chemical characterization and measurement of nanomaterials; emission, exposure, and toxicity of nanomaterials; and control and abatement of nanomaterial releases using filtration technology. Measurement of nanoparticle agglomerates using a newly developed instrument, the Universal NanoParticle Analyzer (UNPA), is discussed. Exposure measurement results for silicon nanoparticles in a pilot scale production plant are presented, as well as exposure measurement and toxicity study of carbon nanotubes (CNTs). Filtration studies of nanoparticle agglomerates are also presented as an example of emission control methods.

  13. Biological control of fire blight in pear orchards with a formulation of Pantoea agglomerans strain Eh 24 Controle biológico de fire blight em pereiras empregando uma formulação de Pantoea agglomerans Eh 24

    Directory of Open Access Journals (Sweden)

    Hatice Özaktan

    2004-09-01

    Full Text Available Biological control by using epiphytic bacteria against Erwinia amylovora has been considered as an alternative method for controlling the disease. Talc-based formulation of Pantoea agglomerans strain Eh-24 was applied at 30% and 100% bloom on two pear orchards which were selected from different locations in the Aegean Region in Turkey. Pear orchard trials were replicated for two years (1999 and 2000 in each place. Talc-based formulation of P. agglomerans strain Eh-24 was sprayed on pear trees which were naturally infected with E. amylovora. In the orchard trials conducted in 1999 and 2000, talc-based formulation of P. agglomerans strain Eh-24 reduced the percentage of blighted blossoms on pear orchards by 63% to 76%, approximately. Copper oxychloride+maneb was less effective in reducing the incidence of blossom infection by E. amylovora in each pear orchard than the bioformulation treatment. P. agglomerans strain Eh-24 labelled with StrR+ was applied at 30% and 100% bloom to monitor the colonization and population dynamics of P. agglomerans on pear blossoms. The population size of P. agglomerans strain Eh-24 strR+ on pear blossoms increased from 2x10(4 to 1.3x10(6 cfu per blossom over 18 days.Controle biológico de Erwinia amylovora através do uso de bactérias epifíticas tem sido considerado um método alternativo para o controle de "fire blight". Uma formulação de Pantoea agglomerans Eh 24 em talco foi utilizada em pereiras a 30% e a 100% de floração, em duas plantações selecionadas na região Aegean da Turquia. Os experimentos foram repetidos duas vezes (1999 e 2000 em cada plantação. A formulação de P. agglomerans foi aspergida nas pereiras naturalmente infectadas com E. amylovora. Nos experimentos de 1999 e 2000, a redução da porcentagem de ocorrência de "fire blight" foi reduzida aproximadamente em 63% e em 76%, respectivamente. Oxicloreto de cobre + maneb foi menos eficiente na redução da infecção por E. amylovora do

  14. Robust Position Tracking for Electro-Hydraulic Drives Based on Generalized Feedforward Compensation Approach

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2012-01-01

    This paper presents a robust tracking control concept based on accurate feedforward compensation for hydraulic valve-cylinder drives. The proposed feedforward compensator is obtained utilizing a generalized description of the valve flow that takes into account any asymmetry of valves and...... constant gain type feedforward compensator, when subjected to strong perturbations in supply pressure and coulomb friction....

  15. An approach for second order control with finite time convergence for electro-hydraulic drives

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2013-01-01

    algorithm parameters. However a discontinuous term internally in the control structure may excite pressures of transmission lines in hydraulic drives as the control structure strives to maintain the control error and its derivative equal to zero. In this paper a modified version of a controller based......Being a second order sliding algorithm, the super twisting algorithm is highly attractive for application in control of hydraulic drives and mechanical systems in general, as it utilizes only the control error while driving the control error as well as its derivative to zero for properly chosen...... on the super twisting algorithm is proposed, with the focus of eliminating the discontinuous term in order to achieve a more smooth control operation. The convergence properties of the proposed controller are analyzed via a conservative phase plane analysis. Furthermore, homogeneity considerations imply finite...

  16. Fuzzy robust nonlinear control approach for electro-hydraulic flight motion simulator

    Directory of Open Access Journals (Sweden)

    Han Songshan

    2015-02-01

    Full Text Available A fuzzy robust nonlinear controller for hydraulic rotary actuators in flight motion simulators is proposed. Compared with other three-order models of hydraulic rotary actuators, the proposed controller based on first-order nonlinear model is more easily applied in practice, whose control law is relatively simple. It not only does not need high-order derivative of desired command, but also does not require the feedback signals of velocity, acceleration and jerk of hydraulic rotary actuators. Another advantage is that it does not rely on any information of friction, inertia force and external disturbing force/torque, which are always difficult to resolve in flight motion simulators. Due to the special composite vane seals of rectangular cross-section and goalpost shape used in hydraulic rotary actuators, the leakage model is more complicated than that of traditional linear hydraulic cylinders. Adaptive multi-input single-output (MISO fuzzy compensators are introduced to estimate nonlinear uncertain functions about leakage and bulk modulus. Meanwhile, the decomposition of the uncertainties is used to reduce the total number of fuzzy rules. Different from other adaptive fuzzy compensators, a discontinuous projection mapping is employed to guarantee the estimation process to be bounded. Furthermore, with a sufficient number of fuzzy rules, the controller theoretically can guarantee asymptotic tracking performance in the presence of the above uncertainties, which is very important for high-accuracy tracking control of flight motion simulators. Comparative experimental results demonstrate the effectiveness of the proposed algorithm, which can guarantee transient performance and better final accurate tracking in the presence of uncertain nonlinearities and parametric uncertainties.

  17. System and method for controlling engine knock using electro-hydraulic valve actuation

    Science.gov (United States)

    Brennan, Daniel G

    2013-12-10

    A control system for an engine includes a knock control module and a valve control module. The knock control module adjusts a period that one or more of an intake valve and an exhaust valve of a cylinder are open based on engine knock corresponding to the cylinder. The valve control module, based on the adjusted period, controls the one or more of the intake valve and the exhaust valve using one or more hydraulic actuators.

  18. Novel electro-hydraulic position control system for primary mirror supporting system

    Directory of Open Access Journals (Sweden)

    Xiongbin Peng

    2016-05-01

    Full Text Available In the field of modern large-scale telescope, primary mirror supporting system technology faces the difficulties of theoretically uniform output force request and bias compensation. Therefore, a novel position control system combining hydraulic system with servo motor system is introduced. The novel system ensures uniform output force on supporting points without complicating the mechanical structure. The structures of both primary mirror supporting system and novel position system are described. Then, the mathematical model of novel position control system is derived for controller selection. A proportional–derivative controller is adopted for simulations and experiments of step response and triangle path tracking. The results show that proportional–derivative controller guarantees the system with micrometer-level positioning ability. A modified proportional–derivative controller is utilized to promote system behavior with faster response overshoot. The novel position control system is then applied on primary mirror supporting system. Coupling effect is observed among actuator partitions, and relocation of virtual pivot supporting point is chosen as the decoupling measurement. The position keeping ability of the primary mirror supporting system is verified by rotating the mirror cell at a considerably high rate. The experiment results show that the decoupled system performs better with smaller bias and shorter recovery time.

  19. Analysis of and H∞ Controller Design For An Electro-Hydraulic Servo Pressure Regulator

    DEFF Research Database (Denmark)

    Stubkier, Søren; Pedersen, Henrik C.; Andersen, Torben Ole

    2011-01-01

    -circuit pumps are still hydraulically controlled, there is however still a need for being able to generate a hydraulic pilot pressure. The focus of the current paper is on the analysis and controller design of an electrohydraulic servo pressure regulator, which generates a hydraulic LS-pressure for a variable...

  20. On Application of Second Order Sliding Mode Control to Electro-Hydraulic Systems

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2014-01-01

    This paper discusses the application of second order mode controls to hydraulic valve-cylinder drives with a special focus on the limitations resulting from nonlinear dynamic effects in flow control valves. Second order sliding mode algorithms appear highly attractive in the successive...

  1. Designing an Electro-Hydraulic Control Module for an Open-Circuit Variable Displacement Pump

    DEFF Research Database (Denmark)

    Pedersen, Henrik Clemmensen; Andersen, Torben Ole; Hansen, Michael Rygaard

    2005-01-01

    , in the form of an electric control signal, under varying working conditions, when having access to engine speed and actual pump pressure. The paper presents a model of both the pump and the control module, along with design considerations on which linear controllers are developed for a worst point......This paper deals with the problem of designing an electric control module for a Sauer-Danfoss Series 45 H-frame open circuit axial piston pump. The purpose of the electric control module is to replace the existing hydro-mechanical (LS) regulator, and enable the pump to follow a reference pressure...

  2. An evaluation of the cost/benefits of concrete biodecontamination

    International Nuclear Information System (INIS)

    Gorschboth, F.F.; Hamilton, M.A.

    1998-08-01

    Two candidate technologies for decontamination of extensive areas of radioactively contaminated concrete, a biological technology and electro-hydraulic scabbling, that had been rated as highly useful in an earlier study were assessed more precisely. These technologies were compared to a base technology, scarification. The evaluation method was an adaptation of the Multi-Attribute Utility Technique (MAUT), a formal quantitative approach for analyzing decisions with regard to multiple objectives. The advantages of the biodecontamination technology were confirmed by this more precise quantitative analysis

  3. Phospholipid-binding protein EhC2A mediates calcium-dependent translocation of transcription factor URE3-BP to the plasma membrane of Entamoeba histolytica.

    Science.gov (United States)

    Moreno, Heriberto; Linford, Alicia S; Gilchrist, Carol A; Petri, William A

    2010-05-01

    The Entamoeba histolytica upstream regulatory element 3-binding protein (URE3-BP) is a transcription factor that binds DNA in a Ca(2+)-inhibitable manner. The protein is located in both the nucleus and the cytoplasm but has also been found to be enriched in the plasma membrane of amebic trophozoites. We investigated the reason for the unusual localization of URE3-BP at the amebic plasma membrane. Here we identify and characterize a 22-kDa Ca(2+)-dependent binding partner of URE3-BP, EhC2A, a novel member of the C2-domain superfamily. Immunoprecipitations of URE3-BP and EhC2A showed that the proteins interact and that such interaction was enhanced in the presence of Ca(2+). Recombinant and native EhC2A bound phospholipid liposomes in a Ca(2+)-dependent manner, with half-maximal binding occurring at 3.4 muM free Ca(2+). A direct interaction between EhC2A and URE3-BP was demonstrated by the ability of recombinant EhC2A to recruit recombinant URE3-BP to phospholipid liposomes in a Ca(2+)-dependent manner. URE3-BP and EhC2A were observed to translocate to the amebic plasma membrane upon an increase in the intracellular Ca(2+) concentration of trophozoites, as revealed by subcellular fractionation and immunofluorescent staining. Short hairpin RNA-mediated knockdown of EhC2A protein expression significantly modulated the mRNA levels of URE3-BP-regulated transcripts. Based on these results, we propose a model for EhC2A-mediated regulation of the transcriptional activities of URE3-BP via Ca(2+)-dependent anchoring of the transcription factor to the amebic plasma membrane.

  4. The knockdown of each component of the cysteine proteinase-adhesin complex of Entamoeba histolytica (EhCPADH) affects the expression of the other complex element as well as the in vitro and in vivo virulence.

    Science.gov (United States)

    Ocádiz-Ruiz, Ramón; Fonseca, Wendy; Linford, Alicia S; Yoshino, Timothy P; Orozco, Esther; Rodríguez, Mario A

    2016-01-01

    Entamoeba histolytica is the protozoan parasite causative of human amoebiasis, disease responsible for 40 000-100 000 deaths annually. The cysteine proteinase-adhesin complex of this parasite (EhCPADH) is a heterodimeric protein formed by a cysteine protease (EhCP112) and an adhesin (EhADH) that plays an important role in the cytopathic mechanism of this parasite. The coding genes for EhCP112 and EhADH are adjacent in the E. histolytica genome, suggesting that their expression may be co-regulated, but this hypothesis has not yet been confirmed. Here, we performed the knockdown of EhCP112 and EhADH using gene-specific short-hairpin RNAs (shRNA), and the effect of these knockdowns on the expression of both complex components as well as on the in vitro and in vivo virulence was analysed. Results showed that the knockdown of one of the EhCPADH components produced a simultaneous downregulation of the other protein. Accordingly, a concomitant reduction in the overall expression of the complex was observed. The downregulation of each component also produced a significant decrease in the in vitro and in vivo virulence of trophozoites. These results demonstrated that the expression of EhCP112 and EhADH is co-regulated and confirmed that the EhCPADH complex plays an important role in E. histolytica virulence.

  5. Failure of the n3 scaling law in the Temkin-Poet model of e-H scattering

    International Nuclear Information System (INIS)

    Shakletron, T.; Stelbovics, A.T.

    2000-01-01

    Full text: We have carried out a study of the Temkin-Poet model of e-H scattering. This model has been of considerable interest to scattering theorists because it is a subset of the full e-H problem and has been used many times to test methods of solution of the full problem. Recently it was shown by Ihra and Macek that the ionisation cross section should be suppressed near threshold. The reason for this is that, classically, ionisation is forbidden in a small region above threshold and hence quantum mechanically we expect a manifestation of quantum mechanical tunnelling. Because the total ionisation cross section can be found using the optical theorem for total cross section and then subtracting off the discrete inelastic scattering cross sections, one might expect interesting behaviour of the inelastic cross sections. Indeed this is confirmed by our extensive numerical simulations using a solution method based on Poet's Fredholm equation of the first kind for the scattering matrix. We conclude that the cross sections fall off at a rate faster than the n 3 scaling law in a region of about 2eV below and above the ionisation threshold. The rate varies with nearness to the threshold

  6. E-H mode transition in low-pressure inductively coupled nitrogen-argon and oxygen-argon plasmas

    International Nuclear Information System (INIS)

    Lee, Young Wook; Lee, Hye Lan; Chung, T. H.

    2011-01-01

    This work investigates the characteristics of the E-H mode transition in low-pressure inductively coupled N 2 -Ar and O 2 -Ar discharges using rf-compensated Langmuir probe measurements and optical emission spectroscopy (OES). As the ICP power increases, the emission intensities from plasma species, the electron density, the electron temperature, and the plasma potential exhibit sudden changes. The Ar content in the gas mixture and total gas pressure have been varied in an attempt to fully characterize the plasma parameters. With these control parameters varying, the changes of the transition threshold power and the electron energy distribution function (EEDF) are explored. In N 2 -Ar and O 2 -Ar discharges at low-pressures of several millitorr, the transition thresholds are observed to decrease with Ar content and pressure. It is observed that in N 2 -Ar plasmas during the transition, the shape of the EEDF changes from an unusual distribution with a flat hole near the electron energy of 3 eV in the E mode to a Maxwellian distribution in the H mode. However, in O 2 -Ar plasmas, the EEDFs in the E mode at low Ar contents show roughly bi-Maxwellian distributions, while the EEDFs in the H mode are observed to be nearly Maxwellian. In the E and H modes of O 2 -Ar discharges, the dissociation fraction of O 2 molecules is estimated using optical emission actinometry. During the E-H mode transition, the dissociation fraction of molecules is also enhanced.

  7. SPATIAL AND TEMPORAL PATTERN OF SOIL pH AND Eh AND THEIR IMPACT ON SOLUTE IRON CONTENT IN A WETLAND (TRANSDANUBIA, HUNGARY

    Directory of Open Access Journals (Sweden)

    SZALAI ZOLTÁN

    2008-06-01

    Full Text Available Land mosaics have direct and indirect influence on chemical reaction and redox condition of soils. The present paper deals with the relationship between some environmental factors (such as soil andvegetation patterns, micro-relief, water regime, temperature and incident solar radiation and the pH, Eh of soils and solute iron in a headwater wetland in Transdanubia, Hungary. Measurements have been taken in four different patches and along their boundaries: sedge (Carex vulpina, Carex riparia, three patches and two species, horsetail (Equisetum arvense, common nettle (Urtica dioica. Thespatial pattern of the studied parameters are influenced by the water regime, micro-topography, climatic conditions and by direct and indirect effects of vegetation. The indirect effect can be the shading, which has influence on soil temperature and on the incident solar radiation (PAR. Root respiration and excretion of organic acids appear as direct effects.. There have been measured individual pH and Eh characteristic in the studied patches. Soil Eh, pH and solute iron have shown seasonal dynamics. Higher redox potentials (increasingly oxidative conditions and higher pH values were measured between late autumn and early spring. The increasing physiological activity of plants causes lower pH and Eh and it leads to higher spatial differences. Although temperature is an essential determining factor for Eh and pH, but our results suggest it rather has indirect effectsthrough plants on wetlands.

  8. Converter for pulsed Bremsstrahlung generation on the basis of he linear electron accelerator EhLU-4 and the results of bipolar integrated circuits irradiation; Konvertur dlya generatsii impul`snogo tormoznogo izlucheniya na baze linejnogo uskoritelya ehlekutronov EhLU-4 i rezul`taty oblucheniya bipolyarnykh integral`nykh skhem

    Energy Technology Data Exchange (ETDEWEB)

    Korshunov, F P; Lazar` , A P; Gurinovich, N I

    1994-12-31

    Description and parameters of a converter produced on the base of EhLU-4 linear electron accelerators allowing one to obtain an intensive flux of pulsed Bremsstrahlung for radiation investigation are presented.

  9. Identification of EhTIF-IA: The putative E. histolytica orthologue of the human ribosomal RNA transcription initiation factor-IA.

    Science.gov (United States)

    Srivastava, Ankita; Bhattacharya, Alok; Bhattacharya, Sudha; Jhingan, Gagan Deep

    2016-03-01

    Initiation of rDNA transcription requires the assembly of a specific multi-protein complex at the rDNA promoter containing the RNA Pol I with auxiliary factors. One of these factors is known as Rrn3P in yeast and Transcription Initiation Factor IA (TIF-IA) in mammals. Rrn3p/TIF-IA serves as a bridge between RNA Pol I and the pre-initiation complex at the promoter. It is phosphorylated at multiple sites and is involved in regulation of rDNA transcription in a growth-dependent manner. In the early branching parasitic protist Entamoeba histolytica, the rRNA genes are present exclusively on circular extra chromosomal plasmids. The protein factors involved in regulation of rDNA transcription in E. histolytica are not known. We have identified the E. histolytica equivalent of TIF-1A (EhTIF-IA) by homology search within the database and was further cloned and expressed. Immuno-localization studies showed that EhTIF-IA co-localized partially with fibrillarin in the peripherally localized nucleolus. EhTIF-IA was shown to interact with the RNA Pol I-specific subunit RPA12 both in vivo and in vitro. Mass spectroscopy data identified RNA Pol I-specific subunits and other nucleolar proteins to be the interacting partners of EhTIF-IA. Our study demonstrates for the first time a conserved putative RNA Pol I transcription factor TIF-IA in E. histolytica.

  10. The dynamics processes of the soil microbecenosis to condition of radionuclides contamination under influence of agent 'Bajkal EhM-1'

    International Nuclear Information System (INIS)

    Shchur, A.V.; Vetoshkina, S.N.; Chernukha, G.A.; Shipilov, Yu.V.; Val'ko, O.V.

    2006-01-01

    Used of the preparation 'Bajkal EhM-1' influences to number of micro-organisms species in microbecenosis and it's popularity were increase. The general pool and biomass of the micro-organisms have a share in the process of the bio dynamics and transformation of an organic matter of the soil experimental plot were increase. (authors)

  11. Implication of Xenobiotic Metabolizing Enzyme gene (CYP2E1, CYP2C19, CYP2D6, mEH and NAT2 Polymorphisms in Breast Carcinoma

    Directory of Open Access Journals (Sweden)

    Gabbouj Sallouha

    2008-04-01

    Full Text Available Abstract Background Xenobiotic Metabolizing Enzymes (XMEs contribute to the detoxification of numerous cancer therapy-induced products. This study investigated the susceptibility and prognostic implications of the CYP2E1, CYP2C19, CYP2D6, mEH and NAT2 gene polymorphisms in breast carcinoma patients. Methods The authors used polymerase chain reaction and restriction enzyme digestion to characterize the variation of the CYP2E1, CYP2C19, CYP2D6, mEH and NAT2 gene in a total of 560 unrelated subjects (246 controls and 314 patients. Results The mEH (C/C mutant and the NAT2 slow acetylator genotypes were significantly associated with breast carcinoma risk (p = 0.02; p = 0.01, respectively. For NAT2 the association was more pronounced among postmenopausal patients (p = 0.006. A significant association was found between CYP2D6 (G/G wild type and breast carcinoma risk only in postmenopausal patients (p = 0.04. Association studies of genetic markers with the rates of breast carcinoma specific overall survival (OVS and the disease-free survival (DFS revealed among all breast carcinoma patients no association to DFS but significant differences in OVS only with the mEH gene polymorphisms (p = 0.02. In addition, the mEH wild genotype showed a significant association with decreased OVS in patients with axillary lymph node-negative patients (p = 0.03 and with decreasesd DFS in patients with axillary lymph node-positive patients (p = 0.001. However, the NAT2 intermediate acetylator genotype was associated with decreased DFS in axillary lymph node-negative patients. Conclusion The present study may prove that polymorphisms of some XME genes may predict the onset of breast carcinoma as well as survival after treatment.

  12. Comprehensive Evaluation of the Properties of Nanocrystalline Diamond Coatings Grown Using CVD with E/H Field Glow Discharge Stabilization

    Directory of Open Access Journals (Sweden)

    Iu. Nasieka

    2015-01-01

    Full Text Available The nanocrystalline diamond films (coatings were prepared using the plasma enhanced chemical vapor deposition (PECVD technique. In this method, direct current (DC glow discharge in the crossed E/H fields was used to activate the gas phase. The diamond coatings were deposited from the working gas mixture CH4/H2 with addition of nitrogen in various concentrations. It was ascertained that addition of N2 to the working gas mixture leads to reduction in the sizes of diamond grains as well as to the substantial decrease in the resistivity of the studied films. The electrophysical data are in good agreement with the changes induced by varying the N2 content in the Raman scattering spectra. The increase in the N2 concentration causes significant lowering of the crystalline diamond related peak and increase in the intensity of the peaks related to the sp2-bonded carbon. These changes in the spectra indicate significant disordering of the structure of prepared films and its uniformity in the nanodiamond film volume. With the great possibility, it is associated with a decrease in the sizes of diamond crystalline grains and tendency of NCD film to amorphization.

  13. Estimation of human percutaneous bioavailability for two novel brominated flame retardants, 2-ethylhexyl tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl) tetrabromophthalate (BEH-TEBP), using the parallelogram approach

    Science.gov (United States)

    2-ethylhexyltetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl)tetrabromophthalate (BEH-TEBP) are novel brominated flame retardants (FRs). BEH-TEBP is used alone as a plasticizer or with EH-TBB in polyurethane foams; both are contaminants in the indoor and outdoor environments. In ...

  14. The implications of non-linear biological oscillations on human electrophysiology for electrohypersensitivity (EHS) and multiple chemical sensitivity (MCS).

    Science.gov (United States)

    Sage, Cindy

    2015-01-01

    maintenance; and resilience can be compromised. Electrohypersensitivity can be caused by successive assaults on human bioelectrochemical dynamics from exogenous electromagnetic fields (EMF) and RFR or a single acute exposure. Once sensitized, further exposures are widely reported to cause reactivity to lower and lower intensities of EMF/RFR, at which point thousand-fold lower levels can cause adverse health impacts to the electrosensitive person. Electrohypersensitivity (EHS) can be a precursor to, or linked with, multiple chemical sensitivity (MCS) based on reports of individuals who first develop one condition, then rapidly develop the other. Similarity of chemical biomarkers is seen in both conditions [histamines, markers of oxidative stress, auto-antibodies, heat shock protein (HSP), melatonin markers and leakage of the blood-brain barrier]. Low intensity pulsed microwave activation of voltage-gated calcium channels (VGCCs) is postulated as a mechanism of action for non-thermal health effects.

  15. A study on reliability of electro-hydraulic governor control system for large steam turbine in power plant

    International Nuclear Information System (INIS)

    Kang, Gu Hwa; Lee, Tae Hoon; Moon, Seung Jae; Lee, Jae Heon; Yoo, Ho Seon

    2008-01-01

    In this work, the right management procedure for hydraulic power oil will be discussed and suggested. A thermal power plant turbine should respond to the change of load status. However, to satisfy the frequency of alternating current, the revolution per minute should be kept constant. Therefore, by controlling the flow rate of the steam to the turbine, the governor satisfies the load variation without alternating the revolution per minutes of the turbine. To protect the governor, the hydraulic power unit should be managed carefully by controlling the quality and the flow rate of the oil

  16. Structure and properties of large-sized forged disk of alloy type KhN73MBTYu-VD(EhI 698-VD)

    International Nuclear Information System (INIS)

    Sudakov, V.S.

    1994-01-01

    Investigation results are presented for structure and mechanical properties of serial large-sized forged disk 1100 mm in diameter produced of alloy type EhI 9698-VD hand tested after standard heat treatment and isothermal ageing at operating temperature. Chemical composition studies have revealed no macroheterogeneity. In a central cross-section macrostructure is free of pores, inclusions, delaminating and variation in grain size. The metal of the disk possesses high values of long-term rupture strength and creep resistance at 650-700 deg C

  17. arXiv Energy-Frontier Lepton-Hadron Collisions at CERN: the LHeC and the FCC-eh

    CERN Document Server

    Kuze, Masahiro

    2018-05-03

    Lepton-hadron colliders that use a proton or nucleus beam of current and future hadron colliders and let it collide with an electron beam from a newly built electron accelerator bring attractive physics programs which are strong and complementary to the hadron collider physics. Machine development for Energy Recovery LINAC and physics performance studies of such electron-hadron colliders, specifically the LHeC that uses the existing LHC beam and FCC-eh that is an option of Future Circular Collider program, are ongoing and reviewed in this article.

  18. Clues to the origin of metal in Almahata Sitta EL and EH chondrites and implications for primitive E chondrite thermal histories

    Science.gov (United States)

    Horstmann, Marian; Humayun, Munir; Bischoff, Addi

    2014-09-01

    Enstatite (E) chondrites are a group of texturally highly variable meteorites formed under strongly reducing conditions giving rise to unique mineral and chemical characteristics (e.g., high abundances of various sulfides and Si-bearing metal). In particular the abundant metal comprises a range of textures in E chondrites of different petrologic type, but available in situ siderophile trace element data on metal are limited. Nine samples of E chondrites from the recent Almahata Sitta fall [one EH3, two EL3/4, two EL6, two EL impact melt rocks (IMR), two EH IMR] were investigated in this study in addition to St. Mark's (EH5) and Grein 002 (EL4/5), with a focus on the nature of their metal constituents. Special attention was given to metal-silicate intergrowths (MSSI) that occur in many primitive E chondrites, which have been interpreted as post-accretionary asteroidal impact melts or primitive nebular condensates. This study shows that siderophile trace element systematics in E chondrite metal are independent of petrologic type of the host rock and distinct from condensation signatures. Three basic types of siderophile trace element signatures can be distinguished, indicating crystallization from a melt, thermal equilibration upon metamorphism/complete melting, and exsolution of schreibersite-perryite-sulfide. Textural and mineral-chemical constraints from EL3/4s are used to evaluate previously proposed formation processes of MSSI (impact melting vs. nebular condensation) and elucidate which other formation scenarios are feasible. It is shown that post-accretionary (in situ) impact melting or metallic melt injection forming MSSI on the thin section scale, and nebular condensation, are unlikely formation processes. This leads to the conclusion that MSSIs are pre-accretionary melt objects that were formed during melting processes prior to the accretion of the primitive E chondrites. The same can be concluded for metal nodules in the EH3 chondrite examined. The pre

  19. Concept study of a novel energy harvesting-enabled tuned mass-damper-inerter (EH-TMDI) device for vibration control of harmonically-excited structures

    International Nuclear Information System (INIS)

    Salvi, Jonathan; Giaralis, Agathoklis

    2016-01-01

    A novel dynamic vibration absorber (DVA) configuration is introduced for simultaneous vibration suppression and energy harvesting from oscillations typically exhibited by large-scale low-frequency engineering structures and structural components. The proposed configuration, termed energy harvesting-enabled tuned mass-damper-inerter (EH-TMDI) comprises a mass grounded via an in-series electromagnetic motor (energy harvester)-inerter layout, and attached to the primary structure through linear spring and damper in parallel connection. The governing equations of motion are derived and solved in the frequency domain, for the case of harmonically-excited primary structures, here modelled as damped single-degree- of-freedom (SDOF) systems. Comprehensive parametric analyses proved that by varying the mass amplification property of the grounded inerter, and by adjusting the stiffness and the damping coefficients using simple optimum tuning formulae, enhanced vibration suppression (in terms of primary structure peak displacement) and energy harvesting (in terms of relative velocity at the terminals of the energy harvester) may be achieved concurrently and at nearresonance frequencies, for a fixed attached mass. Hence, the proposed EH-TMDI allows for relaxing the trade-off between vibration control and energy harvesting purposes, and renders a dual-objective optimisation a practically-feasible, reliable task. (paper)

  20. Ab initio optical potentials applied to low-energy e-H2 and e-N2 collisions in the linear-algebraic approach

    International Nuclear Information System (INIS)

    Schneider, B.I.; Collins, L.A.

    1983-01-01

    We propose a method for constructing an effective optical potential through which correlation effects can be introduced into the electron-molecule scattering formulation. The optical potential is based on a nonperturbative, Feshbach projection-operator procedure and is evaluated on an L 2 basis. The optical potential is incorporated into the scattering equations by means of a separable expansion, and the resulting scattering equations are solved by a linear-algebraic method based on the integral-equation formulation. We report the results of scattering calculations, which include polarization effects, for low-energy e-H 2 and e-N 2 collisions. The agreement with other theoretical and with experimental results is quite good

  1. Measurement of acoustic properties of the composite materials constituting the main rotor hub of the Agusta-Westland helicopter EH-101 (civil version)

    Science.gov (United States)

    Tenti, L.; Denis, R.; Lakestani, F.

    1991-10-01

    The acoustic properties of the EH-101 helicopter rotor hub are tested by characterizing the ultrasonic propagation phenomena in the main directions of the composite materials. The carbon fiber and epoxy resin that make up the rotor hub are measured to determine the attenuation coefficient, phase propagation at normal incidence, and phase propagation as a function of angle of incidence. The speeds are measured for external box and filler samples, and strap samples are discussed separately because of their anisotropic nature and structural importance. Deviations angles of 5 deg cause refraction angles of 10 deg in the deviation of the phase propagation; therefore planar defects with an angle of 10 deg relative to the fiber direction can be easily detected. The method presented is useful in characterizing and locating defects in the composite materials that make up the main rotor hub of helicopters.

  2. Evaluation des explorations hématologiques dans le service de pédiatrie et aux UMCp de 1'EHS (mère-enfant) de Tlemcen.

    OpenAIRE

    GHAFFOUR, ABDESSALAM.

    2014-01-01

    Le but de cette étude était d'évaluer les explorations hématologiques dans le service de pédiatrie générale de l'EHS (mère et enfant) Tlemcen. La taille de l'échantillon était de 418. Les données ont été collectées à l'aide d'un questionnaire. L'hémogramme était l'examen hématologique le plus réalisé (chez 99% des malades). Cette étude nous a révélé la forte prévalence des anémies surtout chez les enfants de l'âge préscolaire, et parmi ces anémies, l'anémie microcytaire hypochr...

  3. Estimation of human percutaneous bioavailability for two novel brominated flame retardants, 2-ethylhexyl 2,3,4,5-tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl) tetrabromophthalate (BEH-TEBP)

    International Nuclear Information System (INIS)

    Knudsen, Gabriel A.; Hughes, Michael F.; Sanders, J. Michael; Hall, Samantha M.; Birnbaum, Linda S.

    2016-01-01

    2-Ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl)tetrabromophthalate (BEH-TEBP) are novel brominated flame retardants used in consumer products. A parallelogram approach was used to predict human dermal absorption and flux for EH-TBB and BEH-TEBP. [ 14 C]-EH-TBB or [ 14 C]-BEH-TEBP was applied to human or rat skin at 100 nmol/cm 2 using a flow-through system. Intact rats received analogous dermal doses. Treated skin was washed and tape-stripped to remove “unabsorbed” [ 14 C]-radioactivity after continuous exposure (24 h). “Absorbed” was quantified using dermally retained [ 14 C]-radioactivity; “penetrated” was calculated based on [ 14 C]-radioactivity in media (in vitro) or excreta + tissues (in vivo). Human skin absorbed EH-TBB (24 ± 1%) while 0.2 ± 0.1% penetrated skin. Rat skin absorbed more (51 ± 10%) and was more permeable (2 ± 0.5%) to EH-TBB in vitro; maximal EH-TBB flux was 11 ± 7 and 102 ± 24 pmol-eq/cm 2 /h for human and rat skin, respectively. In vivo, 27 ± 5% was absorbed and 13% reached systemic circulation after 24 h (maximum flux was 464 ± 65 pmol-eq/cm 2 /h). BEH-TEBP in vitro penetrance was minimal (< 0.01%) for rat or human skin. BEH-TEBP absorption was 12 ± 11% for human skin and 41 ± 3% for rat skin. In vivo, total absorption was 27 ± 9%; 1.2% reached systemic circulation. In vitro maximal BEH-TEBP flux was 0.3 ± 0.2 and 1 ± 0.3 pmol-eq/cm 2 /h for human and rat skin; in vivo maximum flux for rat skin was 16 ± 7 pmol-eq/cm 2 /h. EH-TBB was metabolized in rat and human skin to tetrabromobenzoic acid. BEH-TEBP-derived [ 14 C]-radioactivity in the perfusion media could not be characterized. < 1% of the dose of EH-TBB and BEH-TEHP is estimated to reach the systemic circulation following human dermal exposure under the conditions tested. Chemical compounds studied in this article: 2-Ethylhexyl 2,3,4,5-tetrabromobenzoate (PubChem CID: 71316600; CAS No. 183658-27-7 FW: 549.92 g/mol logP est : 7.73–8

  4. Estimation of human percutaneous bioavailability for two novel brominated flame retardants, 2-ethylhexyl 2,3,4,5-tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl) tetrabromophthalate (BEH-TEBP)

    Energy Technology Data Exchange (ETDEWEB)

    Knudsen, Gabriel A., E-mail: gabriel.knudsen@nih.gov [NCI Laboratory of Toxicology and Toxicokinetics, 111 T W Alexander Dr., Research Triangle Park, NC (United States); Hughes, Michael F. [Integrated Systems Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711 (United States); Sanders, J. Michael; Hall, Samantha M.; Birnbaum, Linda S. [NCI Laboratory of Toxicology and Toxicokinetics, 111 T W Alexander Dr., Research Triangle Park, NC (United States)

    2016-11-15

    2-Ethylhexyl-2,3,4,5-tetrabromobenzoate (EH-TBB) and bis(2-ethylhexyl)tetrabromophthalate (BEH-TEBP) are novel brominated flame retardants used in consumer products. A parallelogram approach was used to predict human dermal absorption and flux for EH-TBB and BEH-TEBP. [{sup 14}C]-EH-TBB or [{sup 14}C]-BEH-TEBP was applied to human or rat skin at 100 nmol/cm{sup 2} using a flow-through system. Intact rats received analogous dermal doses. Treated skin was washed and tape-stripped to remove “unabsorbed” [{sup 14}C]-radioactivity after continuous exposure (24 h). “Absorbed” was quantified using dermally retained [{sup 14}C]-radioactivity; “penetrated” was calculated based on [{sup 14}C]-radioactivity in media (in vitro) or excreta + tissues (in vivo). Human skin absorbed EH-TBB (24 ± 1%) while 0.2 ± 0.1% penetrated skin. Rat skin absorbed more (51 ± 10%) and was more permeable (2 ± 0.5%) to EH-TBB in vitro; maximal EH-TBB flux was 11 ± 7 and 102 ± 24 pmol-eq/cm{sup 2}/h for human and rat skin, respectively. In vivo, 27 ± 5% was absorbed and 13% reached systemic circulation after 24 h (maximum flux was 464 ± 65 pmol-eq/cm{sup 2}/h). BEH-TEBP in vitro penetrance was minimal (< 0.01%) for rat or human skin. BEH-TEBP absorption was 12 ± 11% for human skin and 41 ± 3% for rat skin. In vivo, total absorption was 27 ± 9%; 1.2% reached systemic circulation. In vitro maximal BEH-TEBP flux was 0.3 ± 0.2 and 1 ± 0.3 pmol-eq/cm{sup 2}/h for human and rat skin; in vivo maximum flux for rat skin was 16 ± 7 pmol-eq/cm{sup 2}/h. EH-TBB was metabolized in rat and human skin to tetrabromobenzoic acid. BEH-TEBP-derived [{sup 14}C]-radioactivity in the perfusion media could not be characterized. < 1% of the dose of EH-TBB and BEH-TEHP is estimated to reach the systemic circulation following human dermal exposure under the conditions tested. Chemical compounds studied in this article: 2-Ethylhexyl 2,3,4,5-tetrabromobenzoate (PubChem CID: 71316600; CAS No. 183658

  5. Environment, Health and Safety (EH&S): Division Liaisons

    Science.gov (United States)

    . Israel Tadesse Chemical Sciences x4043 Cell: 610-0856 Maram Kassis Electronic waste (E-waste) pickup or Source Representative 2231, 2014 Scott E. Taylor Chemical Safety Subcommittee Chairperson 4103 Hendrik Representative 7457 Stephen M. Franaszek Genomics Representative 925-296-5807 Vera Potapenko Marcia Ocon Leimer

  6. Demonstration recommendations for accelerated testing of concrete decontamination methods

    Energy Technology Data Exchange (ETDEWEB)

    Dickerson, K.S.; Ally, M.R.; Brown, C.H.; Morris, M.I.; Wilson-Nichols, M.J.

    1995-12-01

    A large number of aging US Department of Energy (DOE) surplus facilities located throughout the US require deactivation, decontamination, and decommissioning. Although several technologies are available commercially for concrete decontamination, emerging technologies with potential to reduce secondary waste and minimize the impact and risk to workers and the environment are needed. In response to these needs, the Accelerated Testing of Concrete Decontamination Methods project team described the nature and extent of contaminated concrete within the DOE complex and identified applicable emerging technologies. Existing information used to describe the nature and extent of contaminated concrete indicates that the most frequently occurring radiological contaminants are {sup 137}Cs, {sup 238}U (and its daughters), {sup 60}Co, {sup 90}Sr, and tritium. The total area of radionuclide-contaminated concrete within the DOE complex is estimated to be in the range of 7.9 {times} 10{sup 8} ft{sup 2}or approximately 18,000 acres. Concrete decontamination problems were matched with emerging technologies to recommend demonstrations considered to provide the most benefit to decontamination of concrete within the DOE complex. Emerging technologies with the most potential benefit were biological decontamination, electro-hydraulic scabbling, electrokinetics, and microwave scabbling.

  7. Demonstration recommendations for accelerated testing of concrete decontamination methods

    International Nuclear Information System (INIS)

    Dickerson, K.S.; Ally, M.R.; Brown, C.H.; Morris, M.I.; Wilson-Nichols, M.J.

    1995-12-01

    A large number of aging US Department of Energy (DOE) surplus facilities located throughout the US require deactivation, decontamination, and decommissioning. Although several technologies are available commercially for concrete decontamination, emerging technologies with potential to reduce secondary waste and minimize the impact and risk to workers and the environment are needed. In response to these needs, the Accelerated Testing of Concrete Decontamination Methods project team described the nature and extent of contaminated concrete within the DOE complex and identified applicable emerging technologies. Existing information used to describe the nature and extent of contaminated concrete indicates that the most frequently occurring radiological contaminants are 137 Cs, 238 U (and its daughters), 60 Co, 90 Sr, and tritium. The total area of radionuclide-contaminated concrete within the DOE complex is estimated to be in the range of 7.9 x 10 8 ft 2 or approximately 18,000 acres. Concrete decontamination problems were matched with emerging technologies to recommend demonstrations considered to provide the most benefit to decontamination of concrete within the DOE complex. Emerging technologies with the most potential benefit were biological decontamination, electro-hydraulic scabbling, electrokinetics, and microwave scabbling

  8. Evaluation of oxygen species during E-H transition in inductively coupled RF plasmas: combination of experimental results with global model

    Science.gov (United States)

    Meichsner, Jürgen; Wegner, Thomas

    2018-05-01

    Inductively coupled RF plasmas (ICP) in oxygen at low pressure have been intensively studied as a molecular and electronegative model system in the last funding period of the Collaborative Research Centre 24 "Fundamentals of Complex Plasmas". The ICP configuration consists of a planar coil inside a quartz cylinder as dielectric barrier which is immersed in a large stainless steel vacuum chamber. In particular, the E-H mode transition has been investigated, combining experimental results from comprehensive plasma diagnostics as input for analytical rate equation calculation of a volume averaged global model. The averaged density was determined for electrons, negative ions O-, molecular oxygen ground state O2(X3 Σg-) and singlet metastable state O2(a1 Δg) from line-integrated measurements using 160 GHz Gaussian beam microwave interferometry coupled with laser photodetachment experiment and VUV absorption spectroscopy, respectively. Taking into account the relevant elementary processes and rate coefficients from literature together with the measured temperatures and averaged density of electrons, O2(X3 Σg-) and O2(a1 Δg) the steady state density was calculated for O(3P), O2(b1 Σg+), O(1D), O(1S), O3, O-, O2-, and O3-, respectively. The averaged density of negative ions O- from the rate equation calculation is compared with the measured one. The normalized source and loss rates are discussed for O(3P), O2(b1 Σg+) and O-. Contribution to the Topical Issue "Fundamentals of Complex Plasmas", edited by Jürgen Meichsner, Michael Bonitz, Holger Fehske, Alexander Piel.

  9. Electromagnetic hypersensitivity (EHS) and subjective health complaints associated with electromagnetic fields of mobile phone communication-a literature review published between 2000 and 2004

    International Nuclear Information System (INIS)

    Seitz, H.; Stinner, D.; Eikmann, Th.; Herr, C.; Roeoesli, M.

    2005-01-01

    Literature published between 2000 to 2004 concerning electromagnetic fields (EMF) of mobile communication and electromagnetic hypersensitivity (EHS) or unspecific symptoms of ill health, respectively, is reviewed. Basically, literature from established databases was systematically searched for. For each study, the design and quality were evaluated by means of a criteria list in order to judge evidence for causality of exposures on effects. Finally, 13 studies of sufficient quality were considered for this review. In only one provocation study, individuals with self-reported electromagnetic hypersensitivity were exposed to EMF. Their perception of field status was no better than would have been expected by chance. Results of five randomised cross-over studies on impaired well-being due to mobile phone exposure were contradictory. Even though these studies would allow more reliable exposure assessment, they are limited due to short exposure period and the small study size. No firm conclusion could be drawn from a few observational epidemiological studies finding a positive association between exposure and unspecific symptoms of ill health due to methodological limitations. Causality of exposure and effect was not derivable from these cross-sectional studies as field status and health complaints were assessed at the same time. In addition, exposure assessment has not been validated. In conclusion, based on the limited studies available, there is no valid evidence for an association between impaired well-being and exposure to mobile phone radiation presently. However, the limited quantity and quality of research in this area do not allow to exclude long-term health effects definitely

  10. EVALUACIÓN CRÍTICA DEL PROGRAMA “¡EH! ¡NO TE DESPISTES!” Y ELABORACIÓN DE UNA PROPUESTA DE INTERVENCIÓN SOCIOEDUCATIVA DE PREVENCIÓN DE LOS MALOS TRATOS Y ABUSOS SEXUALES

    OpenAIRE

    Trenado-Fuertes, Adela

    2014-01-01

    Este trabajo tiene como objeto la evaluación del “Programa comunitario de prevención del abuso sexual y otros malos tratos infantiles ¡Eh! ¡No te despistes!”. El programa surgió como necesidad de encontrar espacios de comunicación interinstitucional, entidades y profesionales para el abordaje integral de la detección intervención y la prevención de los abusos sexuales a menores. Ante la ausencia de una evaluación objetiva en el tiempo y la continuidad del programa “¡Eh! ¡No te despistes!” sur...

  11. EH and UIM: endocytosis and more

    DEFF Research Database (Denmark)

    Polo, Simona; Confalonieri, Stefano; Salcini, Anna Elisabetta

    2003-01-01

    Exogenously and endogenously originated signals are propagated within the cell by functional and physical networks of proteins, leading to numerous biological outcomes. Many protein-protein interactions take place between binding domains and short peptide motifs. Frequently, these interactions......). The other, which we define as the monoubiquitin (mUb) network, relies on monoubiquitination, which is emerging as an important posttranslational modification that regulates protein function. Both networks were initially implicated in the control of plasma membrane receptor endocytosis and in the regulation...

  12. EHS & LCA assessment for 7-ACA synthesis

    DEFF Research Database (Denmark)

    Henderson, Richard K; Jiménez-González, Concepción; Preston, Chris

    2008-01-01

    and half the mass productivity of the enzymatic process. The chemical process uses more hazardous materials and solvents and requires about 25% more process energy than the enzymatic process. When accounting for the cradle-to-gate environmental life cycle, the chemical process has a larger overall...... environmental impact, mainly derived from the production of raw materials. In comparison to the enzyme-catalyzed process, the chemical process uses approximately 60% more energy, about 16% more mass (excluding water), has double the greenhouse gas (GHG) impact, and about 30% higher photochemical ozone creation......-to-gate methodology. The results compare the synthetic efficiency, environment, health, safety, and life cycle metrics for a mature chemical process and a more recent but less developed enzymatic process for making 7-ACA. The chemical process has a higher yield, but a significantly lower reaction mass efficiency...

  13. Response to ONS/EH-OA concerns

    International Nuclear Information System (INIS)

    Rice, P.D.

    1991-01-01

    The DOE's independent Office of Nuclear Safety (ONS) conducted an independent assessment of WSRC's readiness for K-Reactor restart. DOE-ONS identified six areas of concern, with specific findings in each area. The six concerns deal with: (1) Technical Specification surveillance, (2) human factors issues, (3) emergency lighting, (4) fire protection issues, (5) the Unreviewed Safety Question process, and (6) the critique process. This report addresses each of these six concerns and Westinghouse's actions to resolve them

  14. e--H scattering at intermediate energies

    International Nuclear Information System (INIS)

    Ghosh, A.S.

    1978-01-01

    The effect of exchange is included explicitly in the framework of simplified form of the fixed scatterer approximation as proposed by Ghosh. Inclusion of exchange is found to improve the results for the differential cross section appreciably when comparisons are made with the measured values. The computational labour involved is very reasonable. (author)

  15. Site investigation SFR. Fracture mineralogy and geochemistry of borehole sections sampled for groundwater chemistry and Eh. Results from boreholes KFR01, KFR08, KFR10, KFR19, KFR7A and KFR105

    Energy Technology Data Exchange (ETDEWEB)

    Sandstroem, Bjoern (WSP Sverige AB (Sweden)); Tullborg, Eva-Lena (Terralogica AB, Grabo (Sweden))

    2011-01-15

    This report is part of the complementary site investigations for the future expansion of SFR. The report presents the results obtained during a detailed mineralogical and geochemical study of fracture minerals in drill cores from borehole section sampled for groundwater chemistry and where downhole Eh measurements have been performed. The groundwater redox system comprises not only the water, but also the bedrock/fracture mineral system in contact with this water. It is thus important to gain knowledge of the solid phases in contact with the groundwater, i.e. the fracture minerals. The samples studied for mineralogy and geochemistry, here reported, were selected to represent the fracture surfaces in contact with the groundwater in the sampled borehole sections and will give input to the hydrogeochemical model (SFR SDM). The mineralogy was determined using SEM-EDS and XRD and the geochemistry of fracture filling material was analysed by ICP-AES and ICP-QMS. The most common fracture minerals in the samples are mixed layer clay (smectite-illite), illite, chlorite, calcite, quartz, adularia and albite. Other minerals identified in the borehole sections include laumontite, pyrite, barite, chalcopyrite, hematite, Fe-oxyhydroxide, muscovite, REE-carbonate, allanite, biotite, asphaltite, galena, sphalerite, arsenopyrite, uranium phosphate, uranium silicate, Y-Ca silicate, monazite, xenotime, harmotome and fluorite. There are no major differences between the fracture mineralogy of the investigated borehole sections from SFR and the fracture mineralogy of the Forsmark site investigation area. The four fracture mineral generations distinguished within the Forsmark site investigation are also found at SFR. However, some differences have been observed: 1) Barite and uranium minerals are more common in the SFR fractures, 2) clay minerals like mixed layer illite-smectite and illite dominates in contrast to Forsmark where corrensite is by far the most common clay mineral and, 3

  16. Site investigation SFR. Fracture mineralogy and geochemistry of borehole sections sampled for groundwater chemistry and Eh. Results from boreholes KFR01, KFR08, KFR10, KFR19, KFR7A and KFR105

    International Nuclear Information System (INIS)

    Sandstroem, Bjoern; Tullborg, Eva-Lena

    2011-01-01

    This report is part of the complementary site investigations for the future expansion of SFR. The report presents the results obtained during a detailed mineralogical and geochemical study of fracture minerals in drill cores from borehole section sampled for groundwater chemistry and where downhole Eh measurements have been performed. The groundwater redox system comprises not only the water, but also the bedrock/fracture mineral system in contact with this water. It is thus important to gain knowledge of the solid phases in contact with the groundwater, i.e. the fracture minerals. The samples studied for mineralogy and geochemistry, here reported, were selected to represent the fracture surfaces in contact with the groundwater in the sampled borehole sections and will give input to the hydrogeochemical model (SFR SDM). The mineralogy was determined using SEM-EDS and XRD and the geochemistry of fracture filling material was analysed by ICP-AES and ICP-QMS. The most common fracture minerals in the samples are mixed layer clay (smectite-illite), illite, chlorite, calcite, quartz, adularia and albite. Other minerals identified in the borehole sections include laumontite, pyrite, barite, chalcopyrite, hematite, Fe-oxyhydroxide, muscovite, REE-carbonate, allanite, biotite, asphaltite, galena, sphalerite, arsenopyrite, uranium phosphate, uranium silicate, Y-Ca silicate, monazite, xenotime, harmotome and fluorite. There are no major differences between the fracture mineralogy of the investigated borehole sections from SFR and the fracture mineralogy of the Forsmark site investigation area. The four fracture mineral generations distinguished within the Forsmark site investigation are also found at SFR. However, some differences have been observed: 1) Barite and uranium minerals are more common in the SFR fractures, 2) clay minerals like mixed layer illite-smectite and illite dominates in contrast to Forsmark where corrensite is by far the most common clay mineral and, 3

  17. Ultradense Nuclear Fusion in Metallic Lithium Liquid. A report on research performed at the R and D Center, Sakaguchi E.H VOC Co. under the auspices of the Swedish Energy Agency

    International Nuclear Information System (INIS)

    Ikegami, Hidetsugu; Pettersson, Roland

    2006-10-01

    This report is concerned with research and development on a new fusion scheme, 'chemonuclear fusion'. In this scheme, lithium or deuterium ions are implanted in liquid lithium whereby huge reaction rate enhancements, as much as up to 10 15 compared to what is expected for a free two-body deuterium-lithium interaction, are obtained. The enhancement is suggested to be a result of nuclear, atomic and chemical reactions taking place cooperatively. Experimental studies on the Li - D chemonuclear fusion is supported financially by the Swedish Energy Agency and were initiated at the Dept. of Analytical Chemistry, Uppsala University. The studies were continued in a collaboration with the R and D Centre, Sakaguchi E.H VOC Co. in Tokyo where a new and modified setup was constructed. Here, besides the Li - D chemonuclear fusion, the Li - Li fusion and the D 2 - 2Li molecular chemonuclear fusion were developed. In 2005 at the R and D Centre, molecular ions D 2 + of energies 30keV were implanted on a surface of metallic Li liquid. Product alpha particles were identified and measured by a single solid state detector. The energies were around 7.6MeV corresponding to what would be expected for the reaction 7 Li + D → 2x 4 He + n. Under some conditions of the Li liquid, the reaction rate was intermittently so high that the particle detector was saturated and stopped counting simultaneously with an appreciable temperature rise in the Li liquid. The results were discussed in March at the University of Tokyo and in October at the Royal Swedish Academy of Sciences, The Royal Swedish Engineering Academy of Sciences and at Uppsala University. This report presents a full description of the results. It also contains more recent results where an additional detector setup, a ΔE-E detector was used for validation of the results in particular the identity of the alpha particles

  18. The challenge of managing environmental, health, safety and social (EHS and S) aspects of a short term pipeline construction project; El desafio del manejo ambiental, de la salud, de la seguridad y de aspectos sociales del proyecto de construccion a corto plazo de un gasoducto

    Energy Technology Data Exchange (ETDEWEB)

    Zuelta, Edgar A.; Cgavez, Rafael [Transierra S.A. (Bolivia)

    2003-07-01

    The TRANSIERRA pipeline construction project, a 432 Km, 32'' pipeline located in the southern part of Bolivia was ready to kick off, waiting for an Administrative Concession that would allow the project to proceed. The implementation of the EHS Management Plan and the Social Strategies Plan was designed to get the Environmental Permits for changes generated with the detailed engineering design, Clear Cutting License, and a Negotiated agreements with representatives of the 8 Indigenous People's Territories and 6 Municipalities a long the ROW. Any delays due to our failure in achieving the necessary permits would have had an impact in fulfilling the already challenging one year schedule and stand by costs. TRANSIERRA designed a strategy to approach each of the EHS and S aspects in order to meet deadlines, yet implementing a solid EHS and S management system. The necessary resources were deployed to ensure compliance at all levels. The reforestation process required of 35 native species. There were neither seeds nor most of the plants available to complete this task. In addition no data was available on seed processing to successfully grow the number of required individuals; therefore TRANSIERRA developed and implemented a program to reach the reforestation objective. (author)

  19. Identification and real-time position control of a servo-hydraulic rotary actuator by means of a neurobiologically motivated algorithm.

    Science.gov (United States)

    Sadeghieh, Ali; Sazgar, Hadi; Goodarzi, Kamyar; Lucas, Caro

    2012-01-01

    This paper presents a new intelligent approach for adaptive control of a nonlinear dynamic system. A modified version of the brain emotional learning based intelligent controller (BELBIC), a bio-inspired algorithm based upon a computational model of emotional learning which occurs in the amygdala, is utilized for position controlling a real laboratorial rotary electro-hydraulic servo (EHS) system. EHS systems are known to be nonlinear and non-smooth due to many factors such as leakage, friction, hysteresis, null shift, saturation, dead zone, and especially fluid flow expression through the servo valve. The large value of these factors can easily influence the control performance in the presence of a poor design. In this paper, a mathematical model of the EHS system is derived, and then the parameters of the model are identified using the recursive least squares method. In the next step, a BELBIC is designed based on this dynamic model and utilized to control the real laboratorial EHS system. To prove the effectiveness of the modified BELBIC's online learning ability in reducing the overall tracking error, results have been compared to those obtained from an optimal PID controller, an auto-tuned fuzzy PI controller (ATFPIC), and a neural network predictive controller (NNPC) under similar circumstances. The results demonstrate not only excellent improvement in control action, but also less energy consumption. Copyright © 2011 ISA. Published by Elsevier Ltd. All rights reserved.

  20. Decision Analysis Science Modeling for Application and Fielding Selection Applied to Concrete Decontamination Technologies

    International Nuclear Information System (INIS)

    Ebadian, M.A.; Ross, T.L.

    1998-01-01

    Concrete surfaces contaminated with radionuclides present a significant challenge during the decontamination and decommissioning (D and D) process. As structures undergo D and D, coating layers and/or surface layers of the concrete containing the contaminants must be removed for disposal in such a way as to present little to no risk to human health or the environment. The selection of a concrete decontamination technology that is safe, efficient, and cost-effective is critical to the successful D and D of contaminated sites. To support U.S. Department of Energy (DOE) Environmental Management objectives and to assist DOE site managers in the selection of the best-suited concrete floor decontamination technology(s) for a given site, two innovative and three baseline technologies have been assessed under standard, non-nuclear conditions at the Hemispheric Center for Environmental Technology (HCET) at Florida International University (FIU). The innovative technologies assessed include the Pegasus Coating Removal System and Textron's Electro-Hydraulic Scabbling System. The three baseline technologies assessed include: the Wheelabrator Blastrac model 1-15D, the NELCO Porta Shot Blast trademark model GPx-1O-18 HO Rider, and the NELCO Porta Shot Blasttrademark model EC-7-2. These decontamination technology assessments provide directly comparable performance data that have previously been available for only a limited number of technologies under restrictive site-specific constraints. Some of the performance data collected during these technology assessments include: removal capability, production rate, removal gap, primary and secondary waste volumes, and operation and maintenance requirements. The performance data generated by this project is intended to assist DOE site managers in the selection of the safest, most efficient, and cost-effective decontamination technologies to accomplish their remediation objectives

  1. Psychology departments in medical schools: there's one in Canada, eh?

    Science.gov (United States)

    McIlwraith, Robert D

    2014-12-01

    Comments on the original article by Robiner et al. (see record 2014-07939-001) regarding psychologists in medical schools and academic medical center settings. Robiner et al. reported that their extensive review "revealed no independent departments of psychology in U.S. medical schools." The current authors note north of the border in Canada there is one department of psychology in a medical school. The Department of Clinical Health Psychology has been a department within the Faculty of Medicine of the University of Manitoba since 1995. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

  2. Qal'eh Hasan Ali maars, central Iran.

    Science.gov (United States)

    Milton, D.J.

    1976-01-01

    This group of some 15 Late Quaternary explosion craters are typical maars, with rims of bedded pyroclastics. In all but the largest crater, the deposits consist entirely of clasts of country rock (granodiorite and Eocene volcanics). The maars were formed by phreatomagmatic explosions, possibly caused by groundwater originating from a major river. The deposits of the largest maar contain up to 20% juvenile fragments of two types. Tephrite clasts have phenocrysts of phlogopite, clinopyroxene, olivine and anorthoclase; the presence of hauyne as a groundmass phase is notable. Cumulate blocks of phlogopite-clinopyroxene rock also occur. The maar field is part of a distinct province of Quaternary alkaline volcanism, related to a major crustal fracture - the N-S-trending Nayband fault.-R.J.S.

  3. INEL environmental characterization report. Volume III. Appendices E-H

    International Nuclear Information System (INIS)

    1984-09-01

    This volume contains the following appendices: (1) INEL subsurface hydrology; (2) cultural resources assessment of two study areas on the INEL; (3) description of INEL facilities; and (4) effluent measurements and environmental monitoring programs

  4. Lessons in detachment. E.H. Kossmann (1922-2003)

    NARCIS (Netherlands)

    Krul, Wessel

    2006-01-01

    Some remarks on professor E. H. Kossmann as a teacher at the University of Groningen. The author looks back on the way he and some other historians of his generation were influenced by this well-known writer and specialist in the history of political thought. By means of his sense of irony and love

  5. Integrating LCA and EHS expertise in the assessment of nanoparticles

    DEFF Research Database (Denmark)

    Olsen, Stig Irving; Hankin, Steve; Chaudry, Qasim

    DTU with their expertise in LCA have joined forces with IOM in two nanotechnology-related projects, one of which additionally involves and is lead by FERA. The first project, Nancore, includes the evaluation of health risks and environmental impacts over the life cycle concurrently with the devel......DTU with their expertise in LCA have joined forces with IOM in two nanotechnology-related projects, one of which additionally involves and is lead by FERA. The first project, Nancore, includes the evaluation of health risks and environmental impacts over the life cycle concurrently...... the overall environmental impacts of the technology. Through the concurrent assessments, the strengths of the two tools are combined to provide a more qualified assessment of both the health and safety aspects and the life cycle impacts. The overall aim of the second project, sponsored by Defra...

  6. Retail Deli Slicer Inspection Practices: An EHS-Net Study.

    Science.gov (United States)

    Lipcsei, Lauren E; Brown, Laura G; Hoover, E Rickamer; Faw, Brenda V; Hedeen, Nicole; Matis, Bailey; Nicholas, David; Ripley, Danny

    2018-05-01

    The Centers for Disease Control and Prevention (CDC) estimates that 3,000 people die in the United States each year from foodborne illness, and Listeria monocytogenes causes the third highest number of deaths. Risk assessment data indicate that L. monocytogenes contamination of particularly delicatessen meats sliced at retail is a significant contributor to human listeriosis. Mechanical deli slicers are a major source of L. monocytogenes cross-contamination and growth. In an attempt to prevent pathogen cross-contamination and growth, the U.S. Food and Drug Administration (FDA) created guidance to promote good slicer cleaning and inspection practices. The CDC's Environmental Health Specialists Network conducted a study to learn more about retail deli practices concerning these prevention strategies. The present article includes data from this study on the frequency with which retail delis met the FDA recommendation that slicers should be inspected each time they are properly cleaned (defined as disassembling, cleaning, and sanitizing the slicer every 4 h). Data from food worker interviews in 197 randomly selected delis indicate that only 26.9% of workers ( n = 53) cleaned and inspected their slicers at this frequency. Chain delis and delis that serve more than 300 customers on their busiest day were more likely to have properly cleaned and inspected slicers. Data also were collected on the frequency with which delis met the FDA Food Code provision that slicers should be undamaged. Data from observations of 685 slicers in 298 delis indicate that only 37.9% of delis ( n = 113) had slicers that were undamaged. Chain delis and delis that provide worker training were more likely to have slicers with no damage. To improve slicer practices, food safety programs and the retail food industry may wish to focus on worker training and to focus interventions on independent and smaller delis, given that these delis were less likely to properly inspect their slicers and to have undamaged slicers.

  7. NANO(materials): EHS, Research, INnovation, ReGulation

    OpenAIRE

    GOTTARDO STEFANIA; MECH AGNIESZKA; QUIROS PESUDO LAIA; CRUTZEN HUGUES

    2017-01-01

    This collection contains data, results, information and tools derived from research and institutional activities regarding the environment, health and safety matters for supporting sustainable innovation for regulatory purposes, with a focus on nanomaterials.

  8. ¡Eh Ave María, pues!

    Directory of Open Access Journals (Sweden)

    Gilberto Loaiza Cano

    1996-09-01

    Full Text Available Diccionario folklórico antioqueño. Jaime Sierra García. Editorial Universidad de Antioquia, Medellín, 1996, 399 págs. Refranero antioqueño. Carlos García, César Muñoz. Editorial Universidad de Antioquia, Medellín, 1996, 292 págs. Refranes y dichos. Roberto Cadavid Misas (Argos. Editorial Universidad de Antioquia, Medellín, 1996, 417 págs.

  9. Pulsed Joining Of Body-In-White Components

    Energy Technology Data Exchange (ETDEWEB)

    Bonnen, John [Ford Motor Company, Dearborn, MI (United States)

    2014-09-30

    The objective of this project was to develop cost efficient high quality pulsed welding (PW) technology for joining 6xxx Aluminum and High Strength Steel (with tensile strength above 580MPa) components enabling broad usage of hydroformed parts and leading to substantial weight reduction of cars and trucks to reduce US demand on petroleum, lower carbon emissions and energy expenditures. In general, pulsed welding is a form of impact welding where two dissimilar metal pieces are joined by accelerating one to velocities exceeding 300m/s at which point the first piece strikes the second and forms a weld. In this work, two methods were used to accelerate the flyer material: Electro-Magnetic (EM) pulse and Electro-Hydraulic (EH) pulse launching. The advantage of pulsed welding techniques is that welds can be formed between two materials that cannot otherwise be welded: high strength aluminum and high strength steel. The technical objectives of the project included: 1) developing cost affordable production feasible tooling design for PW of 6xxx aluminum to High Strength steel with strengths above 580MPa; 2) demonstrating that fabricated joints can exceed the required service load strength initially at the coupon level and then at the component level; 3) developing fundamental understanding of the mechanisms of joint formation and conditions leading to formation of high quality PW joint; and 4) creating a numerical model predicting the tooling and electric discharge parameters necessary for the joint formation and that satisfy the targeted strength parameters. The project successfully developed: 1) EM and EH pulsed welds between high strength aluminum with tensile strengths exceeding 240MPa and steels exceeding 580MPa; 2) pulsed welds of extrusions with strengths exceeding project requirements; 3) EM and EH flyer launch models and 4) weld interface formation models. However, the grant holder, Ford Motor Company, could see no path to commercialization and the work was

  10. Kur’an-ı Kerim’e Göre Ehl-i Kitap

    OpenAIRE

    Kaya, Remzi

    2005-01-01

    İbn Manzûr, I/698; Râgıb, Müfredât, s. 423. Bakara, 2/183; 216; Nisâ, 4/77; Mâide, 5/45. Bk. İbn Manzûr, Lisânü’l-Arab, I/698-699; Zebidî, I/444; Râgıb, s. 423. Türk Dil Kurumu, Türkçe Sözlük, Ank. 1983, s. 718-719. Bk. Bakara, 2/2; Hûd, 11/1; Sâd, 38/29. Bk. Furkân, 25/1; Bakara, 2/53; İbn Manzûr, X/302. Bk. Bakara, 2/97. Bk. Burûc, 85/21. Geniş bilgi için bk, Râzî, Tefsir, II/14-17. Farklı anlamlar için bk. Bakara, 2/177; Âl-i İmrân, 3/3, 7, 119; Zebîdî, II/331-332. Bk. ...

  11. Fast elastic e-H(2s) scattering in laser fields

    International Nuclear Information System (INIS)

    Vucic, S.; Hewitt, R.; Hewitt, R.

    1997-01-01

    A numerical method for the evaluation of the Born endash Floquet amplitude for laser-assisted scattering is proposed for the case when a large basis set is required to achieve convergence. The method is applied to analyze the elastic scattering of fast electrons by the H(2s) state in a low-intensity laser field of varying frequency and to study the resonant scattering with increasing laser intensity. While the behavior of an atom in a resonant field of low intensity is determined by virtual transitions between resonant levels, at high intensity a great number of nonresonant virtual transitions may significantly influence laser-assisted processes. As a consequence, the attenuation of resonant effects could appear, as well as the open-quotes localclose quotes stabilization of the atom against ionization. copyright 1997 The American Physical Society

  12. Core II Materials for Rural Agriculture Programs. Units E-H.

    Science.gov (United States)

    Biondo, Ron; And Others

    This curriculum guide includes teaching packets for 21 problem areas to be included in a core curriculum for 10th grade students enrolled in a rural agricultural program. Covered in the four units included in this volume are crop science (harvesting farm crops and growing small grains); soil science and conservation of natural resources…

  13. Rational thermomechanical parameters of pressing granulated heat resistant alloy-EhP741

    International Nuclear Information System (INIS)

    Garibov, G.S.; Frolov, A.A.; Ermanok, M.Z.; Kurakin, E.K.; Galkin, A.M.

    1976-01-01

    The paper deals with the development of thermomechanical parameters for the compacting of a granulated, heat-resistant, nickel-base alloy EP 741. With the flow-sheet of the technological process for the production of semi-manufactured products from granules being used as a starting point it was necessary, after compaction, to obtain a bar having optimum plastic properties and to know under what conditions these properties are to be found. On the basis of these assumptions the authors took as the optimized parameter the maximum value of the plasticity characteristic (e.g. relative to elongation of sigma) and measured it on samples cut out from a bar after compacting. The samples of granulated alloy EP 741 which were prepared from bars compacted in accordance with the plan for industrial-scale experiments were tested in factor space tsub(exp)-vsub(exp) (tsub(exp) - sample testing temperature, vsub(exp) - sample testing velocity). Using regressive analysis the authors obtained an equation describing variation of the maximum plasticity of the alloy as a function of temperature and reduction ratio. There were two repetitions of the experimental plan, at vsub(compaction) = 20 and 40mm/sec. A qualitative trend was observed in the influence of compaction velocity on the properties of the bars. The results of the final tests on extension and settling of samples cut from a compact billet showed a maximum for plastic properties at 1170-1180degC

  14. Physics perspectives for a Future Circular Collider: FCC-hh/eh - Physics-Perspectives

    CERN Multimedia

    CERN. Geneva

    2017-01-01

    The lectures will briefly discuss the parameters of a Future Circular Collider, before addressing in detail the physics perspectives and the challenges for the experiments and detector systems. The main focus will be on ee and pp collisions, but opportunities for e—p physics will also be covered. The FCC physics perspectives will be presented with reference to the ongoing LHC programme, including the physics potential from future upgrades to the LHC in luminosity and possibly energy.

  15. At the European Hybrid Spectrometer (EHS) for the experiment NA27

    CERN Multimedia

    1983-01-01

    Continuing along the beam H2 downstream of the Forward Cerenkov (FC, photo 8311661X) one finds the Transition Radiation Detector (TRD) and the Forward Gamma Detector (FGD, yellow structure, near bottom). See Nucl. Instrum. Methods A258 (1987) 26-50.

  16. Natural Icing Re-Evaluation of the EH-60A Quick Fix Helicopter

    Science.gov (United States)

    1989-05-01

    INDIVIDUAL 22b. TELEPHONE (Include Area Code) 22c. OFFICE SYMBOL ,!.lIl.,.\\ R I ,VIS (805) 277-2115 , , SAVIF-PR DDForm 1473, JUN 86 Previous editions are...Rc1iiort. -\\I-.FA PI lcit No. 88-06, Artijical and Natural Iking Test. of the I-il- trA )iuck IFix lI ic-opici June 1988. I ttcr. AVSCO(), AISA \\V--S

  17. Thermal detection of single e-h pairs in a biased silicon crystal detector

    Science.gov (United States)

    Romani, R. K.; Brink, P. L.; Cabrera, B.; Cherry, M.; Howarth, T.; Kurinsky, N.; Moffatt, R. A.; Partridge, R.; Ponce, F.; Pyle, M.; Tomada, A.; Yellin, S.; Yen, J. J.; Young, B. A.

    2018-01-01

    We demonstrate that individual electron-hole pairs are resolved in a 1 cm2 by 4 mm thick silicon crystal (0.93 g) operated at ˜35 mK. One side of the detector is patterned with two quasiparticle-trap-assisted electro-thermal-feedback transition edge sensor arrays held near ground potential. The other side contains a bias grid with 20% coverage. Bias potentials up to ±160 V were used in the work reported here. A fiber optic provides 650 nm (1.9 eV) photons that each produce an electron-hole (e- h+) pair in the crystal near the grid. The energy of the drifting charges is measured with a phonon sensor noise σ ˜0.09 e- h+ pair. The observed charge quantization is nearly identical for h+s or e-s transported across the crystal.

  18. Boron effect on the thermodynamic properties of EhI703 steel

    International Nuclear Information System (INIS)

    Belyakova, P.E.; Korytina, S.F.; Nejmark, B.E.

    1976-01-01

    A reliable determination of boron effect on the physical properties of steel grade EI 703 dictated experimental studies of the real calorific capacity csub(p), thermal conduction lambda, resistivity π, modulus of normal elastisity E, internal friction delta, thermal expansion Δ 1/1, together with the calculation of the mean calorific capacity csub(p20-t), enthalpy Hsub(20-t), Lorentz's number L, real and mean coefficients of linear expansion (α and αsub(20-t), respectively ), and also temperature conductivity a in the interval from 20 to 950 deg C

  19. EFFICIENCY THE KEY TO FUTURE PIG PRODUCTION E.H. Kemm

    African Journals Online (AJOL)

    The continued production of pigs and pig products will no doubt greatly ..... body mass to 56 days of age has increased fronr l.5kpl to. Thc overall efficiency with ... Braude believes that the annual output of lean meat per sow can be increased ...

  20. At the European Hybrid Spectrometer (EHS) for the experiment NA27

    CERN Multimedia

    1983-01-01

    The experiment NA27 was intended to measure accurately the lifetime of Charm particles and to study their hadronic production and decay particles. The vertex detector was the hydrogen bubble chamber LEBC. The aim was to collect several hundreths of fully reconstructed D0 and D+-, and several tens of F+- and Lambda_c decays as produced by 360 GeV/c negative pions and 400 GeV/c protons. The photo gives a side view of a section of the spectrometer, with a 12 m long gas Cerenkov counter at the centre. The spectrometer axis enters the photo at bottom, left corner. See photo 8311661, 8311662X, 8311660X.

  1. High-energy behaviour of e--H scattering cross section

    International Nuclear Information System (INIS)

    Saha, B.C.; Chaudhuri, J.; Ghosh, A.S.

    1976-01-01

    An integral form of the close coupling equation has been employed to investigate the high energy behaviour of the elastic and 2s excitation cross sections of hydrogen atom by electron impact retaining the 1s and 2s states. The results, with and without exchange, for both the total and the differential cross sections are presented. The effects of exchange as well as of couplings to the 1s-2s states on the elastic cross section have been studied. The FBA results for the elastic cross section differ from the present results appreciably in the energy range 100 to 200 eV where FBA is considered to be valid. On the other hand, the present 1s-2s excitation results are very close to the corresponding FBA results in the said energy region. (auth.)

  2. EHS nähtavaks / Eesti SportHobuste Kasvatajate Selts

    Index Scriptorium Estoniae

    2014-01-01

    Eesti SportHobuste Kasvatajate Seltsi tõuraamatusse kuuluvate eesti sporthobuste esinemisest ratsavõistlustel Leningradi oblasti kuberneri karikale 4.-6. juulil, Venta Cupil 11.-13. juulil ning koolisõidu ja takistussõidu Eesti meistrivõistlustel

  3. Study of dinosaur's egg shell by EPR method; Issledovaniya metodom EhPR skorlupy yaits dinozavrov

    Energy Technology Data Exchange (ETDEWEB)

    Tleuberdina, R A; Nasirov, R N

    1998-07-01

    Two varieties of calcium carbonate are defined on base of ESR spectra radiation-inducted signals containing in mollusc shell and dinosaur and ostrich egg shell; their spectral characters are studied by infrared-spectroscopy methods and X-ray analysis. Possibility of correlation between ESR signals intensity of CO{sub 2}-radical of investigated object and geological age is determined. (author)

  4. HM-EH-RT: hybrid multimodal energy harvesting from rotational and translational motions

    Directory of Open Access Journals (Sweden)

    Miles Larkin

    2013-12-01

    Full Text Available This paper presents a novel hybrid multimodal energy harvesting device consisting of an unbalanced rotary disk that supports two transduction methods, piezoelectric and electromagnetic. The device generates electrical energy from oscillatory motion either orthogonal or parallel to the rotary axis to power electronic devices. Analytical models for the electromagnetic and piezoelectric systems were developed to describe the mechanical and electrical behavior of the device. From these models, numerical simulations were performed to predict power generation capabilities. The device was fabricated, and several components were optimized experimentally. The energy harvester was then experimentally characterized using a modal shaker in several different orientations. The device generates a maximum RMS power output of 120 mW from the electromagnetic system at 5 Hz and 0.8 g, and 4.23 mW from the piezoelectric system at 20.2 Hz and 0.4 g excitation acceleration. The device is 180 mm in diameter and 45 mm thick including the rotor height. Further size optimization will produce an energy harvester capable of being used as a wearable device to power mobile electronics for multiple applications.

  5. HM-EH-RT: hybrid multimodal energy harvesting from rotational and translational motions

    OpenAIRE

    Miles Larkin; Yonas Tadesse

    2013-01-01

    This paper presents a novel hybrid multimodal energy harvesting device consisting of an unbalanced rotary disk that supports two transduction methods, piezoelectric and electromagnetic. The device generates electrical energy from oscillatory motion either orthogonal or parallel to the rotary axis to power electronic devices. Analytical models for the electromagnetic and piezoelectric systems were developed to describe the mechanical and electrical behavior of the device. From these models, nu...

  6. Extended hierarchical search (EHS) algorithm for detection of gravitational waves from inspiralling compact binaries

    CERN Document Server

    Sengupta, A S; Lazzarini, A; Prince, T

    2002-01-01

    Pattern matching techniques such as matched filtering will be used for online extraction of gravitational wave signals buried inside detector noise. This involves cross correlating the detector output with hundreds of thousands of templates spanning a multi-dimensional parameter space, which is very expensive computationally. A faster implementation algorithm was devised by Mohanty and Dhurandhar using a hierarchy of templates over the mass parameters, which speeded up the procedure by about 25-30 times. We show that a further reduction in computational cost is possible if we extend the hierarchy paradigm to an extra parameter, namely, the time of arrival of the signal. In the first stage, the chirp waveform is cut-off at a relatively low frequency allowing the data to be coarsely sampled leading to cost saving in performing the FFTs. This is possible because most of the signal power is at low frequencies, and therefore the advantage due to hierarchy over masses is not compromised. Results are obtained for sp...

  7. Characterization and Performance of a Liquid Hydrocarbon-Fueled Pulse Detonation Rocket Engine

    National Research Council Canada - National Science Library

    Damphousse, Paul

    2001-01-01

    .... The first time use of a new electro-hydraulic liquid fuel injector was demonstrated to produce consistent atomization properties while allowing for varying fuel injection durations at frequencies up to 50 Hz...

  8. Construction of Eh-pH and other stability diagrams of uranium in a multicomponent system with a microcomputer

    International Nuclear Information System (INIS)

    Haung, H.; Cuentas, L.

    1989-01-01

    Stability diagrams for a multicomponent system in aqueous chemistry provide important information for hydrometallurgy, corrosion science, geochemistry and environmental science. Two distinct types of diagrams constructed are predominance diagrams and distribution diagrams. The ability to construct stability diagrams easily, quickly and accurately is most helpful in research and development and in academic programs. The use of a microcomputer is handicapped by slow speed and limited memory. Developing program methods that promote easy calculation and plot the diagram directly on a CRT or a plotter is a primary concern. As presented in this paper, the calculation of equilibrium and boundary constraints, combined with isolation of stability areas, works well for constructing predominance diagrams. Equilibrium constraints can be obtained based on free energies of formation. Boundary constraints for the ligand component are the boundary of the diagram, and constraints for the main component are the surrounding lines of each dominant ligand. Other considerations regarding the chemical model, mathematics computation and the use of microcomputers pertaining to diagram construction are discussed. The uranium in a multicomponent system is used for demonstration

  9. Heat treatment effects on structure and proerties of the alloy type KhN73MBNYu (EhJ 698)

    International Nuclear Information System (INIS)

    Maslenkov, S.B.; Maslenkova, E.A.; Solov'ev, Yu.V.; Zryumov, V.P.

    1994-01-01

    Influence of quenching temperature and various ageing conditions on tensile properties and impact strength of wrought alloy type KhN73MBTYu has been investigated at room temperature and in the range of 500-850 deg C. Two-step quenching followed by ageing at 700-750 deg C. Two-step quenching followed by ageing at 700-750 deg C is shown to assure needed heat resistance of the alloy. Due to the whole complex of structural changes during heat treatments mechanical properties of the alloy preserv high level up to 750 deg C. This temperature is limiting value in the case of long-term operation

  10. EHL-i juhatuse arvamus töölepingu seaduse eelnõu kohta / Sven Rondik

    Index Scriptorium Estoniae

    Rondik, Sven

    2008-01-01

    Eesti Haridustöötajate Liidu juhatus tegi TALO-le ettepaneku mitte kooskõlastada töölepingu seaduse (TLS) eelnõu esitatud kujul ja sotsiaalministeeriumile ettepaneku koostada uus eelnõu, kaasates sotsiaalpartnereid

  11. Application of Eh-pH diagram for room temperature precipitation of zinc stannate microcubes in an aqueous media

    International Nuclear Information System (INIS)

    Al-Hinai, Ashraf T.; Al-Hinai, Muna H.; Dutta, Joydeep

    2014-01-01

    Graphical abstract: - Highlights: • One pot aqueous synthesis of zinc stannate (ZnSnO 3 ) particles at low temperature. • Synthesis designed with the assistance of potential-pH diagram. • ZnSnO 3 estimated to be stable between pH 8 and 12 was used for synthesis of the particles. • ZnSnO 3 ·3H 2 O were formed during the precipitation of zinc stannate. - Abstract: Potential-pH diagram assisted-design for controlled precipitation is an attractive method to obtain engineered binary and ternary oxide particles. Aqueous synthesis conditions of zinc stannate (ZnSnO 3 ) particles at low temperature were formulated with the assistance of potential-pH diagram. The pH of a solution containing stoichiometric amounts of Zn 2+ and Sn 4+ was controlled for the precipitation in a one pot synthesis step at room temperature (25 °C). The effect of the concentration of the reactants on the particle size was studied by varying the concentration of the precursor (Zn 2+ + Sn 4+ ) solution. Scanning electron micrographs show that the particles are monodispersed micron sized cubes formed by the self-organization of nano-sized crystallites. The obtained microcubes characterized by X-ray Diffraction and thermo gravimetric analysis (TGA) show that the particles are in ZnSnO 3 ·3H 2 O form

  12. Regularities in forming hardened layer during electric spark alloying on the mechanized plant EhFI-66

    International Nuclear Information System (INIS)

    Verkhoturov, A.D.; Zajtsev, E.A.

    1975-01-01

    The regularities in erosion and formation of a hardened layer during electric spark alloying by a mechanized installation EFI-66-type have been studied. The heat resisting metals: Ti,Zr,V,Nb,Ta,Cr,Mo,W have been used as material for alloying electrodes. The effect of the thermophysical constants, as well as of the time of treatment and the material nature have been investigated. No direct dependence of erosion on the thermophysical constants was found. The erosion resistance of material, when treated by a mechanized installation, depends on its plasticity. Tantalum appeared to be more erosion-resistant, its cold-embrittlement temperature being the least. The dependence of the erosion on the alloying time is of a linear character. Depending on the nature of material are the most erosive vanadium and chromium, tantalum is the least erosive. The metallographic analysis has shown, that in the electric spark alloying by means of the mechanized installation the hardened layer could be subdivided into a ''white'' layer of high hardness and a layer of transformed structure. The ''white'' layer thickness is practically the same for each of the metals. The largest summary thickness of the layer is observed when alloying with the metals Ti, Zr, Nb, Ta

  13. Assessment of relationship between Macro Ergonomic conditions and employees work satisfaction Touse-eh and Omran factory

    Directory of Open Access Journals (Sweden)

    M. Rismanchian

    2008-04-01

    Full Text Available Background and aims   Background and aim: Macro ergonomics is a social - technical attitude which in the manner of top down proceeds to look at organization planning , work- system and also planning of human - machine , human -environmental , human- job interaction and emphasizes on employees participation and make plenty use of it.   Methods   This descriptive - analytical study is of cross - sectional type. Data gathering method  is based on observation and questionnaire. The society under study includes 83 personnel (employees of a factory which is a subsidiary of Iran Khodro. We used two questionnaires in this  study. One is questionnaire to verify macro ergonomic situation which planned and consisted of  30 questions that investigated different factors in working environment and was verified in terms  of stability and reliability (cronbach alpha = 0.72 and the other one was Minnesota job satisfaction  questionnaire which was distributed among people.   Results   This research shows over 1,500 extended hour's male workers, 69 percent of whom  reported "Chronic or Frequent" back pain, while 52 percent reported "Chronic or Frequent" wrist  pain. Sleep deprivation could possibly be damaging in terms of muscle, ligament, or tendon  injury. With the average extended-hours employee sleeping only 5.1 hours to 5.5 hours each day when working a night shift, they could face an increased risk of ergonomic injuries. The mean age of people under investigation is 30.8. Most people are in age group of 26-30 (44.6% most  individuals have 4 to 7 years working experience (56.6%. Macro ergonomic mean score in total  society under study was obtained as 59.8. The highest score of job satisfaction has been related to middle managers (69.2. Pearson correlation test showed that there was a direct relationship between general domain of macro ergonomic and job satisfaction.   Conclusion   There is a consistency between main enhanced results in our study in terms of macro ergonomic situation with the result of similar studies of barariyan (2006 and rajabzadeh (2002 that have used RSI (Relative Stress Index. Also there is a correlation between the result of  our study job satisfaction with the results of similar studies such as Bassy's (2002 in Swedish employees , Garcia and Molina's (1999 in Spanish employees and the result of Partovi study  (2006 in Esfahan steel plant employees and Davari's (2003 in employees of Esfahan Shahid PowerStation.

  14. Convergence of an L2-approach in the coupled-channels optical potential method for e-H scattering

    International Nuclear Information System (INIS)

    Bray, I.; Konovalov, D.A.; McCarthy, I.E.

    1990-08-01

    An L 2 approach to the coupled-channels optical method is studied. The investigation is done for electron-hydrogen elastic scattering at projectile energies of 30, 50, 100 and 200 eV. Weak coupling, free-particle Green's function and no exchange in Q-space are appoximations used to calculate the polarization potential. This model problem is solved exactly using actual hydrogen discrete and continuum functions. The convergence of an L 2 approach with the Laguerre basis to the exact result is investigated. It is found that a basis of 10 Laguerre functions is sufficient for convergence of approximately 5% in the polarization potential matrix elements and 2% in the differential cross sections for non-large angles. The convergence is faster for smaller energies. In general, the convergence to the exact result is slow. 12 refs., 2 tabs., 2 figs

  15. Element analysis using EhGi-5 electrostatic generator of Joint InstitUte of Nuclear Research

    International Nuclear Information System (INIS)

    Vasil'eva, Eh.V.; Zheronkin, G.F.; Zvarova, T.S.; Iliev, S.; Osetinskij, G.M.; Sovinski, M.S.; Tishin, V.G.

    1979-01-01

    Two mutually complementing methods have been developed for analysis of the element composition of matter with the aid of beams of accelerated H, 4 He, 3 He and 14 N ions in the energy range of 2 to 4 MeV. One of the methods is based on measurement of the elastic scattering of these particles at wide angles, while the other is based on measurement of the X rays induced by a proton beam. Both analysis methods are illustrated by X-ray spectra taken durin.o proton bombardment of various materials (Lavsan, targets of resin, crystalline and film-type garnet, etc.). The methods are highly sensitive and rapid, and no sample destruction and misrepresentation of the element composition of multicomponent mixtures are involved

  16. The role of Eh and pH in leaching Saskatchewan uranium ores with chloride and nitrate leaching systems

    International Nuclear Information System (INIS)

    Nirdosh, I.; Muthuswami, S.V.

    1992-01-01

    The effects of solution E h and pH on the extractions of U, 230 Th, 226 Ra, As and Ni from two typical uranium ores from the province of Saskatchewan in Canada are discussed for the leachants ferric chloride, ferric nitrate, nitric acid and hydrochloric acid. It is concluded that E h > 700 mV and pH 230 Th extraction is more sensitive to solution pH than to E h whereas Ni extraction is sensitive mainly to the solution E h . Arsenic extraction is very sensitive to solution E h , and for a given E h , is high at pH 1.3. (orig.) [de

  17. Measuring system for in situ measurements of pH, Eh, pS2-,SP and temperature in boreholes

    International Nuclear Information System (INIS)

    Johansson, B.-E.; Lund, J.

    1981-01-01

    The instrument has a computer controlled measuring system and an improved design of electrodes and connections. The electrode potential is digitalized in the probe and is transferred via optocouplings to the central unit to be stored on band or on printer tape. Preliminary tests are presented. (G.B.)

  18. Combining ex-ante LCA and EHS screening to assist green design : A case study of cellulose nanocrystal foam

    NARCIS (Netherlands)

    Tan, Lianghui; Mandley, Steven J.; Peijnenburg, Willie; Waaijers-van der Loop, Susanne L.; Giesen, Daniel; Legradi, Jessica B.; Shen, Li

    2018-01-01

    The evaluation of environmental credentials for innovative products within the research and design phase of development presents a valuable yet challenging exploit. The research presented here aims to carry out the early-stage environmental assessment of a novel nano material – cellulose

  19. Effect of Heat Input on Inclusion Evolution Behavior in Heat-Affected Zone of EH36 Shipbuilding Steel

    Science.gov (United States)

    Sun, Jincheng; Zou, Xiaodong; Matsuura, Hiroyuki; Wang, Cong

    2018-03-01

    The effects of heat input parameters on inclusion and microstructure characteristics have been investigated using welding thermal simulations. Inclusion features from heat-affected zones (HAZs) were profiled. It was found that, under heat input of 120 kJ/cm, Al-Mg-Ti-O-(Mn-S) composite inclusions can act effectively as nucleation sites for acicular ferrites. However, this ability disappears when the heat input is increased to 210 kJ/cm. In addition, confocal scanning laser microscopy (CSLM) was used to document possible inclusion-microstructure interactions, shedding light on how inclusions assist beneficial transformations toward property enhancement.

  20. Concrete decontamination scoping tests

    International Nuclear Information System (INIS)

    Archibald, K.E.

    1995-01-01

    This report details the research efforts and scoping tests performed at the Idaho Chemical Process Plant using scabbling, chemical, and electro-osmotic decontamination techniques on radiologically contaminated concrete

  1. Decontamination Project for Cell G of the Metal Recovery Facility at Oak Ridge National Laboratory, Oak Ridge, Tennessee

    International Nuclear Information System (INIS)

    Mandry, G.J.; Grisham, R.W.

    1994-02-01

    The goal of the decontamination effort in Cell G at the Metal Recovery Facility, Building 3505, located at the Oak Ridge National Laboratory, was two-fold: to determine the effectiveness of the dry decontamination technique employed and to provide data required to assess whether additional decontamination using this method would be beneficial in the eventual decommissioning of the facility. Allied Technology Group (ATG) was contracted to remove a portion of the concrete surface in Cell G by a technique known as scabbling. Some metallic cell components were also scabbled to remove paint and other surface debris. Generally, the scabbling operation was a success. Levels of contamination were greatly reduced. The depth of contaminant penetration into the concrete surfaces of certain areas was much greater than had been anticipated, necessitating the removal of additional concrete and extending ATG's period of performance. Scabbling and other related techniques will be extremely useful in the decontamination and decommissioning of other nuclear facilities with similar radiological profiles

  2. The main features of control and operation of steam turbines at nuclear power plants

    International Nuclear Information System (INIS)

    Czinkoczky, B.

    1981-01-01

    The output and speed control of steam turbines at nuclear power plants as well as the combination of both controls are reviewed and evaluated. At the same time the tasks of unit control at nuclear power plants, the control of steady main steam pressure and medium pressure of primary circuit, further the connection of reactor and turbine controls and the self-controlling properties of pressurized water reactor are dealt with. Hydraulic and electro-hydraulic speed control, the connection of cach-up dampers and speed control and the application of electro-hydraulic signal converters are discussed. The accomplishment of protection is also described. (author)

  3. 46 CFR 58.25-5 - General.

    Science.gov (United States)

    2010-10-01

    ..., means a ball, plug, spool, or similar valve with a handle connected for quick manual operation. Followup... its associated electrical equipment, including motor controller, disconnect switch, and feeder circuit. (2) In the case of an electro-hydraulic steering gear, an electric motor, connected pump, and...

  4. Improvement of Algorithms for Pressure Maintenance Systems in Drum-Separators of RBMK-1000 Reactors

    Energy Technology Data Exchange (ETDEWEB)

    Aleksakov, A. N., E-mail: yankovskiy.k@nikiet.ru; Yankovskiy, K. I. [JSC “N. A. Dollezhal Research and Development Institute of Power Engineering (NIKIET),” (Russian Federation); Dunaev, V. I.; Kushbasov, A. N. [JSC “Diakont,” (Russian Federation)

    2015-05-15

    The main tasks and challenges for pressure regulation in the drum-separators of RBMK-1000 reactors are described. New approaches to constructing algorithms for pressure control in drum-separators by electro-hydraulic turbine control systems are discussed. Results are provided from tests of the operation of modernized pressure regulators during fast transients with reductions in reactor power.

  5. stepping motor - hydraulic motor servo drives for an nc milling machine

    African Journals Online (AJOL)

    Dr Obe

    stepping motor Drive Assembly especially Designed for CNC systems". 13th Machine Tool Design and. Research. (MTDR) conference,. University of Birmingham, 1972. 2 Ertongur, N.A. "Investigation into the instability in an electro hydraulic control system for machine tools" Ph.D. Thesis, University of. Birmingham, UK. 1966 ...

  6. Modeling and controller design on ARX model of Electro-Hydrolic ...

    African Journals Online (AJOL)

    Electro-hydraulic actuator (EHA) is commonly used in industry for its linear movement, quick response and accurate positioning of heavy loads. However, the uncertainties, highly nonlinearities and time varying characteristic of EHA caused difficulties in controlling the system. This paper studies the performance of Fuzzy PID ...

  7. The calculation of the contributions to low energy e+H2 scattering from sigma u+ and pion u symmetries using the Kohn variational method

    International Nuclear Information System (INIS)

    Armour, E.A.G.; Baker, D.J.; Plummer, M.

    1990-01-01

    Above incident energies of about 2 eV, the contribution to the total cross section in positron+H2 scattering from the sigma g+ symmetry is insufficient to account for the experimental value. Calculations carried out of the lowest partial waves of sigma u+ symmetry and Pion u symmetry using the Kohn variational method are described. The contributions to the total cross section from the two equivalent partial waves of Pion u symmetry significantly reduce the discrepancy with experiment up to incident energies of 4 to 5 eV. Comparisons are made with recent R-matrix calculations performed by Danby and Tennyson

  8. The inclusion of long-range polarisation functions in calculations of low-energy e+-H2 scattering using the Kohn method

    International Nuclear Information System (INIS)

    Armour, E.A.G.; Plummer, M.

    1989-01-01

    An explanation is given of why it is necessary to include long-range polarisation functions in the trial function when carrying out Kohn calculations of low-energy positron (and electron) scattering by atoms and simple molecules. The asymptotic form of these functions in low-energy e + -H 2 scattering is deduced. Appropriate functions with this asymptotic form are used to represent the closed-channel part of the wavefunction in a Kohn calculation of the lowest partial wave of Σ u + symmetry in e + -H 2 scattering at very low energies. For k≤0.03a 0 -1 , the results obtained are in good agreement with those obtained using the Born approximation and the asymptotic forms of the static and polarisation potentials. The relationship is pointed out between this method of taking into account long-range polarisation and the polarised pseudostate method used in R-matrix calculations. (author)

  9. Study of the hadronic production and properties of new particles with a lifetime 10$^{-13}$ s < $\\tau$ < 10$^{-10}$ s using LEBC-EHS

    CERN Multimedia

    2002-01-01

    The 1-litre high resolution hydrogen bubble chamber LEBC is combined with a downstream analysis system provided by the European Hybrid Spectrometer in an experiment designed to study the hadronic production and properties of charmed and other short-lived particles. In a previous test experiment (NA13) the bubble chamber has operated with resolved bubble images in the range 35-50 $\\mu$m diameter and bubble densities $\\sim$ 100/cm. Candidates for charm pair production have been observed. \\\\ \\\\ The experiment should yield 20-30 events per microbarn in each of two exposures, to 370 GeV $\\pi^{-}$ and to 400 GeV protons. The high resolution chamber serves to identify events containing short-lived particles and to associate the final state charged particles correctly with their vertices of origin. Momentum analysis will be to $\\simeq \\pm$ 1% for x > 0 charged particles and 2-3% on forward $\\pi^{0}$s using the intermediate and forward gamma detectors. Some charged particle identification is provided by the test modu...

  10. Third-order optical model analysis of e+-H(2s), e+-He(21S) and e+-He(23S) elastic scattering at intermediate energies

    International Nuclear Information System (INIS)

    Vucic, S.; Potvliege, R.M.; Joachain, C.J.; Louvain Univ., Louvain-la-Neuve

    1987-01-01

    We study the elastic scattering of electrons by the metastable states H(2s), He(2 1 S) and He(2 3 S) at intermediate energies within the framework of the third-order optical potential theory. The first-, second- and third-order contributions to the optical potential are analysed separately, and are compared with the corresponding quantities for e - H(1s) and e - He(1 1 S) elastic scattering. Results for positron impact scattering are also presented. (author)

  11. Free-Free Transitions of the e-H System Inside a Dense Plasma Irradiated by a Laser Field at Very Low Incident-Electron Energies

    Science.gov (United States)

    Bhatia, A. K.; Sinha, C.

    2012-01-01

    The free-free transition is studied for an electron-hydrogen atom in ground state when a low-energy electron (external) is injected into hydrogenic plasma in the presence of an external homogenous, monochromatic, and linearly polarized laser field. The effect of plasma screening is considered in the Debye-Huckel approximation. The calculations are performed in the soft photon limit. The incident electron is considered to be dressed by the laser field in a nonperturbative manner by choosing the Volkov solutions in both the initial and final channels. The space part of the scattering wave function for the electron is solved numerically by taking into account the electron exchange. The laser-assisted differential and total cross sections are calculated for single-photon absorption or emission and no-photon exchange in the soft photon limit, the laser intensity being much less than the atomic field intensity. The calculations have been carried out for various values of Debye parameter, ranging from 0.005 to 0.12. A strong suppression is noted in the laser-assisted cross sections as compared to the field-free situation. A significant difference is noted for the singlet and triplet cross sections. The suppression is much more in the triplet states.

  12. Free-Free Transitions of e-H System Inside a Dense Plasma Irradiated by a Laser Field at Very Low Incident Electron Energies

    Science.gov (United States)

    Bhatia, A. K.; Sinha, C.

    2012-01-01

    The free-free transition is studied for an electron-hydrogen in the ground state at low incident energies in the presence of an external homogenous, monochromatic, and linearly polarized laser-field inside a hot dense plasma.The effect of plasma screening is considered in the Debye-Huckel approximation. The calculations are performed in the soft photon limit, assuming that the plasma frequency is much higher than the laser frequency. The incident electron is considered to be dressed by the laser field in a nonperturbative manner by choosing the Volkov solutions in both the initial and final channels. The space part of the scattering wave function for the electron is solved numerically by taking into account the electron exchange. The laser-assisted differential and total cross sections are calculated for single-photon absorption /emission and no photon exchange in the soft photon limit, the laser intensity being much less than the atomic field intensity. The calculations have been carried out for various values of Debye parameter, ranging from 0.005 to 0.12. A strong suppression is noted in the laser-assisted cross sections as compared to the field-free situation. A significant difference is noted for the singlet and triplet cross sections. The suppression is much more in the triplet states.

  13. Prevalence of high-risk egg-preparation practices in restaurants that prepare breakfast egg entrées: an EHS-Net study.

    Science.gov (United States)

    Lee, Robin; Beatty, Mark E; Bogard, April K; Esko, Michael-Peter; Angulo, Frederick J; Selman, Carol

    2004-07-01

    Salmonella enterica serotype Enteritidis (SE) is a common cause of foodborne illness in the United States. Foods prepared with raw shell eggs have often been associated with SE outbreaks. The federal government published the Egg Safety Action Plan in December 1999 that called for reduction of egg-preparation practices that may contribute to the survival and proliferation of SE. In seven states, an interview and brief site evaluation of 153 restaurants that prepare eggs during all hours of operation was conducted by the Environmental Health Specialists Network to determine the prevalence of such practices. Fifty-four percent (83 of 153) of restaurants pooled raw shell eggs not intended for immediate service. These pooled eggs were held a median of 4 h for scrambled eggs, 5.5 h for omelets, and 6 h for pancakes and French toast. Nearly 26% (39 of 152) of restaurants reported storing eggs at room temperature, and 5% (7 of 152) stored eggs on ice or in cold-water baths before cooking. Generally, eggs were cooked to 72 to 83 degrees C, which is above the recommended final cook temperature of 63 to 68 degrees C. Employees reported sanitizing utensils used to prepare eggs less than once every 4 h in 42% (57 of 136) of restaurants. Several areas were identified in which further emphasis might reduce egg-associated SE infections in accordance with Healthy People 2010 goals.

  14. Absolute total electronically elastic differential e--H2 scattering cross-section measurements from 1 to 19 eV

    International Nuclear Information System (INIS)

    Furst, J.; Mahgerefteh, M.; Golden, D.E.

    1984-01-01

    Absolute e - -H 2 total electronically elastic differential scattering cross sections have been determined from relative scattered-electron angular distribution measurements in the energy range from 1 to 19 eV by comparison to absolute e - -He elastic differential scattering cross sections measured in the same apparatus. Integrated total cross sections have been determined as well. Absolute differences as large as 50% between the present results and some previous results have been found, although the agreement as to shape is quite good in many cases. The present results are generally in excellent agreement with recent full rovibrational laboratory-frame close-coupling calculations

  15. "Eh! I Felt I Was Sabotaged!": Facilitators' Understandings of Success in a Participatory HIV and IPV Prevention Intervention in Urban South Africa

    Science.gov (United States)

    Gibbs, Andrew; Willan, Samantha; Jama-Shai, Nwabisa; Washington, Laura; Jewkes, Rachel

    2015-01-01

    Participatory approaches to behaviour change dominate HIV- and intimate partner violence prevention interventions. Research has identified multiple challenges in the delivery of these. In this article, we focus on how facilitators conceptualize successful facilitation and how these understandings may undermine dialogue and critical consciousness,…

  16. The influence of parton structure on hadronic interactions in EHS with a $K^{+}$/$\\pi^{+}/p$ beam at 250 GeV/c

    CERN Multimedia

    2002-01-01

    The aim of the experiment is to study the following topics: a) The influence of parton structure on low p^t hadron-hadron collisions. b) Strangeness flow and correlations in fragmentation. c) Meson-Nucleus collisions. The data are expected to throw light on the still uncalculable (soft) quark fragmentation mechanism, in particular when the 'tagged' strange quark of the K|+ beam is involved as parent quark.\\\\ \\\\ The experiment is done with the European Hybrid Spectrometer which has a large geometrical acceptance combined with good momentum resolution and with very powerful particle identification. The general layout is shown in the Figure. With a very general trigger, a wealth of reactions will be accumulated, which will permit a detailed study of an umbiased sample of events. For all topics of physics under study, it is highly desirable and for some even absolutely essential that the experimental set-up contains the forward Cerenkov detector and th radiation detector. For topic c), the rapid cycling bubble ch...

  17. Some fundamental questions concerning the kinetic theory of electrons in molecular gases and the e-H2 vibrational cross section controversy

    International Nuclear Information System (INIS)

    Robson, R E; White, R D; Morrison, Michael A

    2003-01-01

    We commence a fundamental re-examination of the kinetic theory of charged particle swarms in molecular gases, focusing on collisional excitation of molecular rotational and ro-vibrational states by electrons. Modern day analysis of electron swarms has been based upon the kinetic equation of Wang-Chang et al, which simply treats all processes as scalar energy excitations, and ignores angular momentum conservation and the vector dynamics associated with rotational excitation. It is pointed out that there is no alternative, more exact kinetic equation readily available for electrons which enables one to directly ascertain the degree of error introduced by this approximation. Thus in this preliminary study, we approach the problem indirectly, from the standpoint of the neutral molecules, using the Waldmann-Snider quantum kinetic equation, and insist that an electron-molecule collision must look the same from the perspective of both electron and molecule. We give a formula for quantitatively assessing the importance of scalar versus vectorial treatments of rotational excitation by looking at the post-collisional 'echo' produced by an electron swarm as it passes through the gas. It is then pointed out that in order to remedy any deficiency, it will be necessary to introduce a kinetic collisional operator non-local in space to properly account for angular momentum conservation, as has long been established in the literature. This is a major exercise and given the preliminary nature of this study, we consider the inclusion of such effects from a formal point of view only. In particular we show how non-local effects lead to a spatially dependent 'source' term in the equation of continuity, and hence to corrections for both drift velocity and diffusion coefficients. The magnitude of these corrections has yet to be established

  18. Effect of preliminary thermal treatment of EhP-56 on resistivity to cold cracks formation in the joint heat affected zone

    International Nuclear Information System (INIS)

    Fedorov, V.G.; Shubin, V.I.; Belov, Yu.M.

    1975-01-01

    Data are given on the influence of the conditions of prior heat treatment on the resistance of steel EP56 to cold cracking in the joint heat affected zone /HAZ/. Other things being equal, the resistance of steel EP56 to cold cracking in the HAZ increases with reduction of hardness and increase of austenite content. Conditions for welding steel EP56, preventing cracking in the HAZ, have been determined

  19. The cycling and distribution of PER-like antigen in relation to neurons recognized by the antisera to PTTH and EH in Thermobia domestica

    Czech Academy of Sciences Publication Activity Database

    Závodská, Radka; Šauman, Ivo; Sehnal, František

    2003-01-01

    Roč. 33, - (2003), s. 1227-1238 ISSN 0965-1748 R&D Projects: GA ČR GA204/01/0404 Institutional research plan: CEZ:AV0Z5007907 Keywords : circadian clock * period * PTTH Subject RIV: ED - Physiology Impact factor: 2.358, year: 2003

  20. Preparation and Eh-pH diagrams of Fe(II)-Fe(III) green rust compounds; hyperfine interaction characteristics and stoichiometry of hydroxy-chloride, -sulphate and -carbonate

    International Nuclear Information System (INIS)

    Genin, J.-M.R.; Refait, Ph.; Simon, L.; Drissi, S.H.

    1998-01-01

    Fe(II)-Fe(III) hydroxy-chloride, -sulphate and -carbonate were prepared by oxidation of a ferrous hydroxide precipitate in anion-containing aqueous solutions. The compounds are characterized by monitoring the redox potential E h and the pH of stochiometric suspension vs time with the appropriate concentration ratios. X-ray diffraction allows us to characterize the crystal structure by distinguishing 'green rust one' (GR1) from 'green rust two' (GR2). Since green rusts (GRs) are of a pyroaurite-sjoegrenite-like structure, i.e., consisting of intercalated foreign anions and water molecules in the interlayers between the brucite-like layers of Fe(OH) 2 , their chemical formulae can be determined from the Moessbauer spectra. Three quadrupole doublets are observed: D 1 and D 2 correspond to a ferrous state with isomershift IS of about 1.27 mm s -1 and quadrupole splittings QS of about 2.85 and 2.60 mm s -1 , respectively, whereas D 3 corresponds to a ferric state with IS and QS of about 0.4 mm s -1 . The hyperfine parameters of these doublets are similar from one green rust to another but their intensity ratios vary considerably. Finally, E h and pH equilibrium diagrams of the Fe species in the presence of chloride, sulphate and carbonate anions contained within the water solution are drawn and the thermodynamic conditions of existence and degrees of oxidation of green rusts are discussed

  1. The calculation of the contributions to low energy e+H2 scattering from sigma u+ and Pion u symmetries using the Kohn variational method

    Science.gov (United States)

    Armour, E. A. G.; Baker, D. J.; Plummer, M.

    1990-01-01

    Above incident energies of about 2 eV, the contribution to the total cross section in positron+H2 scattering from the sigma g+ symmetry is insufficient to account for the experimental value. Calculations carried out of the lowest partial waves of sigma u+ symmetry and Pion u symmetry using the Kohn variational method are described. The contributions to the total cross section from the two equivalent partial waves of Pion u symmetry significantly reduce the discrepancy with experiment up to incident energies of 4 to 5 eV. Comparisons are made with recent R-matrix calculations performed by Danby and Tennyson.

  2. Use of two-potential theory in electron-molecule scattering: Application to wide-angle e-H2 scattering at 40 eV

    International Nuclear Information System (INIS)

    Ritchie, B.

    1984-01-01

    A Green's-function approach is used to solve the Schroedinger equation in an effective potential (V 0 ), which is the sum of independent-atom static potentials. The equation for the Green's function is conveniently solved in momentum space (MS), where the MS ''potentials'' (Fourier transforms of the atom-centered potentials) have translational symmetry. The Green's function is then used to construct the solution to the Schroedinger equation for scattering in the potential V-V 0 (where V is the e-molecule static potential plus a local exchange potential) relative to scattering in V 0 . This solution is found in coordinate space using single-center expansions about the internuclear midpoint. These are more rapidly convergent for V-V 0 than for V or V 0 alone. The sum of the amplitudes for scattering in V 0 and in V-V 0 relative to V 0 then represents the amplitude for scattering from the molecule. This method is intended to combine the dynamical methods best suited for each type of potential (multicenter for V 0 and single center for V-V 0 ). It also exposes the shortcomings of the use of V 0 alone

  3. Research of decreasing of the cesium radionuclides discharge in the course pouring of the liquid glass from furnace EhP-500/1

    International Nuclear Information System (INIS)

    Sadovskij, B.F.; Borisov, N.B.; Dzekun, E.G.; Skobtsov, A.S.

    1996-01-01

    Cesium radionuclides discharge from the furnace liquid-glass discharge unit are studied and estimates of cesium emission from the glass melt by the stream flow-out and filling the waste storage capacity are performed. The ways for decreasing cesium discharges are indicated and new additional aerosol protection system for high-active glass discharge, providing for high protection efficiency is proposed. 10 refs., 1 fig., 1 tab

  4. Problems and principles of NPP diagnostics on the basis of mode parameter monitoring. Problemy i printsipy diagnostirovaniya YaEhU na osnove kontrolya rezhimnykh parametrov

    Energy Technology Data Exchange (ETDEWEB)

    Znyshev, V V

    1990-01-01

    Ideology of an approach to solving the problem of functional NPP diagnostics according to data on the dynamics of the plant monitored mode parameter dynamics, is presented. Difficulties in solving caused by NPP specific features as a diagnostics object are considered. Practical reasons simplifying the problem are expressed.

  5. Decontamination technologies evaluations

    International Nuclear Information System (INIS)

    Tripp, J.

    1996-01-01

    Testing has been completed at the Idaho Chemical Processing Plant (ICPP) on in situ recyclable abrasives grit blasting, concrete cleaning (using scabbling, chemicals and electro-kinetics) and laser light ablation of metals. Several small scale tests have also been conducted with strippable coatings, CO 2 pellet blasting and various other techniques. The results of this testing is summarized in this paper

  6. Sliding Control with Chattering Elimination for Hydraulic Drives

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2012-01-01

    This paper presents the development of a sliding mode control scheme with chattering elimination, generally applicable for position tracking control of electro-hydraulic valve-cylinder drives. The proposed control scheme requires only common data sheet information, no knowledge on load characteri......This paper presents the development of a sliding mode control scheme with chattering elimination, generally applicable for position tracking control of electro-hydraulic valve-cylinder drives. The proposed control scheme requires only common data sheet information, no knowledge on load...... controller is developed for the control derivative based on a reduced order model. Simulation results demonstrate strong robustness when subjected to parameter perturbations and that chattering is eliminated....

  7. Simulation and controller design for an agricultural sprayer boom leveling system

    KAUST Repository

    Sun, Jian

    2011-01-01

    According to the agricultural precision requirements, the distance from sprayer nozzles to the corps should be kept between 50 cm to 70 cm. The sprayer boom also needs to be kept parallel to the field during the operation process. Thus we can guarantee the quality of the chemical droplets distribution on the crops. In this paper we introduced a sprayer boom leveling system for agricultural sprayer vehicles with electro-hydraulic auto-leveling system. The suitable hydraulic actuating cylinder and valve were selected according to the specific systemic specifications. Furthermore, a compensation controller for the electro-hydraulic system was designed based on the mathematical model. With simulations we can optimize the performance of this controller to make sure a fast leveling response to the inclined sprayer boom. © 2011 IEEE.

  8. Solution to the incompatibility between reactor protection logic and turbine shot logic. Scram by high pressure; Solucion a la incompatibilidad entre logica de proteccion de reactor y logica de disparo de turbina. SCRAM por alta presion

    Energy Technology Data Exchange (ETDEWEB)

    Ramos Q, R.; Santiago F, C.; Gonzalez P, G., E-mail: ruben.ramos01@cfe.gob.mx [Comision Federal de Electricidad, Central Nuclear Laguna Verde, Subgerencia de Ingenieria, Carretera Cardel-Nautla Km. 42.5, Alto Lucero, Veracruz (Mexico)

    2013-10-15

    The nuclear power plant of Laguna Verde carried out the Modernization and Increase of Extended Power Project in its two Units (2005-2011). This modernization included to the electro-hydraulic control system of the main turbine, replacing an ana logical system by one digital (Digital Electro-hydraulic Control - DEHC) whose functions are of controlling the reactor pressure in the different operation ways as wells as of controlling the velocity and load of the main turbine. Also, it has protections that are related with diverse plant systems, as the Reactor Protection Systems (RPS). During the tests stage was realized a programmed load rejection, which Reactor Scram should cause when being presented the shot of main turbine. However, the logic of the RPS was inhibited due to the quick response of the new control DEHC, propitiating a condition of non prospective plant and, in consequence, the Reactor Scram happened for another protection of the RPS. (author)

  9. Pressure control valve using proportional electro-magnetic solenoid actuator

    International Nuclear Information System (INIS)

    Yun, So Nam; Ham, Young Bog; Park, Pyoung Won

    2006-01-01

    This paper presents an experimental characteristics of electro-hydraulic proportional pressure control valve. In this study, poppet and valve body which are assembled into the proportional solenoid were designed and manufactured. The constant force characteristics of proportional solenoid actuator in the control region should be independent of the plunger position in order to be used to control the valve position in the fluid flow control system. The stroke-force characteristics of the proportional solenoid actuator is determined by the shape (or parameters) of the control cone. In this paper, steady state and transient characteristics of the solenoid actuator for electro-hydraulic proportional valve are analyzed using finite element method and it is confirmed that the proportional solenoid actuator has a constant attraction force in the control region independently on the stroke position. The effects of the parameters such as control cone length, thickness and taper length are also discussed

  10. Modeling and simulation of the agricultural sprayer boom leveling system

    KAUST Repository

    Sun, Jian

    2011-01-01

    According to the agricultural precision requirements, the distance from sprayer nozzles to the corps should be kept between 50 cm to 70 cm. The sprayer boom also needs to be kept parallel to the field during the application process. Thus we can guarantee the quality of the chemical droplets distribution on the crops. In this paper we design a sprayer boom leveling system for agricultural sprayer vehicles combined with a four-rod linkage self-leveling suspension and electro-hydraulic auto-leveling system. The dynamic analysis shows that the suspension can realize an excellent self-leveling in a comparative small inclination range. In addition we build compensation controller for the electro-hydraulic system based on the mathematical model. With simulations we can optimize the performance of this controller to make sure a fast leveling response to the inclined sprayer boom. © 2011 IEEE.

  11. Robust sampled-data control of hydraulic flight control actuators

    OpenAIRE

    Kliffken, Markus Gustav

    1997-01-01

    In todays flight-by-wire systems the primary flight control surfaces of modern commercial and transport aircraft are driven by electro hydraulic linear actuators. Changing flight conditions as well as nonlinear actuator dynamics may be interpreted as parameter uncertainties of the linear actuator model. This demands a robust design for the controller. Here the parameter space design is used for the direct sampled-data controller synthesis. Therefore, a static output controller is choosen, the...

  12. In situ observation of high temperature tensile deformation and low cycle fatigue response in a nickel-base superalloy

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Xudong, E-mail: lxdong0700@hotmail.com; Du, Jinhui; Deng, Qun

    2013-12-20

    High temperature tension and low cycle fatigue experiments of IN718 alloy have been performed in the electro-hydraulic servo system with scanning electron microscope at 455 °C. Fatigue crack initiation and propagation process are investigated in situ. Results show that the carbide and twin grain are the crack source of the low cycle fatigue of IN718 alloy, and the low cycle fatigue life of the alloy increases with the decrease in grain size.

  13. Brake Performance Analysis of ABS for Eddy Current and Electrohydraulic Hybrid Brake System

    OpenAIRE

    Ren He; Xuejun Liu; Cunxiang Liu

    2013-01-01

    This paper introduces an eddy current and electro-hydraulic hybrid brake system to solve problems such as wear, thermal failure, and slow response of traditional vehicle brake system. Mathematical model was built to calculate the torque of the eddy current brake system and hydraulic brake system and analyze the braking force distribution between two types of brake systems. A fuzzy controller on personal computer based on LabVIEW and Matlab was designed and a set of hardware in the loop system...

  14. Fault Detection and Severity Analysis of Servo Valves Using Recurrence Quantification Analysis

    Science.gov (United States)

    2014-10-02

    method of false nearest neighbors, we found that the minimum embedding dimension for the system is d=2. Figure 3 shows the recurrence plots of the...manufacturing process planning method for the components of a complex mechatronic system . Applied Mathematical Modelling, 37(24), 9829–9845. Samadani, M...diagnostics of nonlinear systems . A detailed nonlinear math- ematical model of a servo electro-hydraulic system has been used to demonstrate the procedure

  15. High Speed Trimaran (HST) Seatrain Experiments, Model 5714

    Science.gov (United States)

    2013-12-01

    wave absorbing beach at the other. The carriage has electro-hydraulic drive and a regenerative braking system with a maximum carriage speed of 20...Carderock Division To: Commander, Naval Sea Systems Command (PMS3 85) Subj FORWARDING OF REPORT Encl: (1) NSWCCD-80-TR-2013/015, "High Speed Trimaran...and verify the system processes and capability. Your comments will be reviewed and are appreciated. JUDE F. BROWN By direction Copy to: NAVSEA

  16. Age-dependent oxidation of extracellular cysteine/cystine redox state (Eh(Cys/CySS)) in mouse lung fibroblasts is mediated by a decline in Slc7a11 expression.

    Science.gov (United States)

    Zheng, Yuxuan; Ritzenthaler, Jeffrey D; Burke, Tom J; Otero, Javier; Roman, Jesse; Watson, Walter H

    2018-04-01

    Aging is associated with progressive oxidation of the extracellular environment. The redox state of human plasma, defined by the concentrations of cysteine (Cys) and cystine (CySS), becomes more oxidized as we age. Recently, we showed that fibroblasts isolated from the lungs of young and old mice retain this differential phenotype; old cells produce and maintain a more oxidizing extracellular redox potential (E h (Cys/CySS)) than young cells. Microarray analysis identified down-regulation of Slc7a11, the light subunit of the CySS/glutamate transporter, as a potential mediator of age-related oxidation in these cells. The purpose of the present study was to investigate the mechanistic link between Slc7a11 expression and extracellular E h (Cys/CySS). Sulforaphane treatment or overexpression of Slc7a11 was used to increase Slc7a11 in lung fibroblasts from old mice, and sulfasalazine treatment or siRNA-mediated knock down was used to decrease Slc7a11 in young fibroblasts. Slc7a11 mRNA levels were measured by real-time PCR, Slc7a11 activity was determined by measuring the rate of glutamate release, Cys, CySS, glutathione (GSH) and its disulfide (GSSG) were measured by HPLC, and E h (Cys/CySS) was calculated from the Nernst equation. The results showed that both E h (Cys/CySS) and E h (GSH/GSSG) were more oxidized in the conditioned media of old cells than in young cells. Up-regulation of Slc7a11 via overexpression or sulforaphane treatment restored extracellular E h (Cys/CySS) in cultures of old cells, whereas down-regulation reproduced the oxidizing E h (Cys/CySS) in young cells. Only sulforaphane treatment was able to increase total GSH and restore E h (GSH/GSSG), whereas overexpression, knock down and sulfasalazine had no effect on these parameters. In addition, inhibition of GSH synthesis with buthionine sulfoximine had no effect on the ability of cells to restore their extracellular redox potential in response to an oxidative challenge. In conclusion, our study reveals Slc7a11 is the key regulator of age-dependent changes in extracellular E h (Cys/CySS) in primary mouse lung fibroblasts, and its effects are not dependent on GSH synthesis. Copyright © 2018 Elsevier Inc. All rights reserved.

  17. Hydrochemical characterisation of the opalinus clay in the test interval of the BDI-B1 borehole and on site pH, Eh, Fe(II) and alkalinity measurements

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez, A.M.; Turrero, M.J.; Yllera, A.; Melon, A.M.; Sanchez, M.D.; Pena, J.; Garralon, A.; Rivas, P. [Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas (CIEMAT), Dpt. of Energy Environmental Impact, Madrid (Spain); Hernan, P. [ENRESA, Madrid (Spain)

    2005-07-01

    Clay formations are considered as a feasible option for the disposal of high-level radioactive wastes. In order to determine their suitability for this purpose, the evaluation of the hydro-geochemistry and transport mechanisms must be undertaken. In this sense, a general understanding of the basic physical and chemical processes that govern the solute transport together with a detailed site-characterization programme is required. To reach this goal, a number of activities have been developed in the Opalinus Clay formation at the Mont Terri Underground Research Laboratory (URL) at Switzerland. In the context of some experiments (WS-C, WS-D, WS-E, GM Task, DI, etc.), the Opalinus Clay formation has been comprehensively characterized to develop a conceptual, thermodynamic and transport model of solutes. The framework of these works is the need to know the mechanism of the possible migration of radionuclides and the pore water chemistry, as essential data for the performance assessment of such argillaceous systems. (authors)

  18. Paavo Järvi eesti muusikaga. Eesti oratooriumikoor Iisraelis. Sumera teos virtuoosses ettekandes. Väike ooper Peterburis. Olev Ehala EHLi esimeheks. "Talvepihu" taaselustab näärid. Respeito a Jobim. Tubina ühingus / Priit Kuusk

    Index Scriptorium Estoniae

    Kuusk, Priit, 1938-

    2002-01-01

    Paavo Järvi esinemistest mitmete orkestritega ja eesti muusikaga. Eesti oratooriumikoor reisib Iisraeli, et osaleda Israel New Opera projektis. Saksamaa ajalehtedes avaldati tunnustavat kriitikat Sumera teose virtuoosse ettekande kohta. 24. ئ 26. I viibis Peterburis lasteteater Väike Ooper. Eesti Heliloojate Liit valis oma esimeheks Olev Ehala. Estonia Seltsi Segakoor ja Saue Poistekoor alustavad talvemuusika kontsertide sarja "Talvepihu". Bossa Nova kuninga Antonio Carlos Jobimi 75. sünniaastapäevale pühendatud kontserdist "Respeito a Jobim". 5.II toimunud Eduard Tubina ühingu aastakoosolekust

  19. Clasificación de las secciones rectangulares de hormigón armado por los criterios de cálculo: compresión, interpolaciones y flexión. (Instrucción EH-73

    Directory of Open Access Journals (Sweden)

    Navarro Gutiérrez, Julián

    1978-10-01

    Full Text Available In every case of design of a reinforced concrete rectangular section element, it is possible to readily determine two quantities, which taken as x-y coordinates will define a point, these numbers being taken from the initial Information previous to the actual calculations. The position of such point in the plot indicates the equation system to be used in the calculation of the section. When compatibility occurs there are four possibilities: compression (single of multiple, interpolated compression, interpolated deflection and deflection (single or multiple. To each of these possibilities corresponds a given finite or infinite space in the plot In order to obtain the limits of these spaces, one must first chose the ρ = coefficient of the reinforcement covering. sc = concrete ultimate modulus. Almost all common design and calculation cases are grouped as follows: I. Determination of a section where the width b is known and the height d is unknown. II. Determination of sections where both b and d are known. If the ρ and s sc values have been previously established, each of the above groups will have its own given plotted graph.

    En cualquier caso de cálculo de una sección rectangular de hormigón armado, a partir de sus datos y antes de hacer el correspondiente cálculo, es posible determinar fácilmente dos números que, adoptados como coordenadas, determinan un punto. La situación de este punto en su plano de representación Indica el sistema de ecuaciones que ha de ser utilizado para el cálculo de la sección. En los casos de compatibilidad hay cuatro posibilidades: compresión (simple o compuesta, compresión interpolada, flexión interpolada y flexión (simple o compuesta. Corresponde a cada una de estas posibilidades un determinado recinto, finito o infinito, en el plano de representación. Para obtener los contornos de estos recintos es necesario previamente elegir el valor del parámetro ρ = coeficiente de recubrimiento de las armaduras. ρ = coeficiente de recubrimiento de las armaduras; sc = coeficiente de rotura del hormigón. Casi todos los casos corrientes de cálculo se agrupan en: I. Determinación de secciones en las que el ancho b es dato y el canto d es incógnita. II. Determinación de secciones en las que b y d son datos. A cada grupo corresponde un determinado gráfico, si previamente se ha establecido el valor de ρ.

  20. Ehl-i Sünnet Açısından Bilgi ve DeğeriKnowledge and its Value in Terms of the Ahl As-Sunnah

    Directory of Open Access Journals (Sweden)

    ismail yücedağ

    2014-06-01

    Full Text Available Kelâm ilmînin amacı, dinî inançları kesin deliller kullanarak ispat etmektir. Bu nedenle kelâmcılar Kur’an’ı ve iki kısma ayırdıkları Sünnet’in ilk kısmında yer alan mütevâtir haberleri esas almışlardır. Kelâm ilminde üç bilgi edinme yolu olduğu kabul edilmiştir. Bunlar, beş duyu, akıl ve haber-i sâdık’tır. Bilgi edinme yollarından ilk ikisini oluşturan beş duyu ve akıl ile elde edilen bilgiler ile Sünnet’in ilk kısmında yer alan mütevâtir haberin değeri konusunda İslâm âlimleri arasında bir ihtilâf söz konusu değildir. Hicretin II. asrından itibaren, sünnetin ikinci kısmını oluşturan haber-i vahid’in değeri ve itikâdî konularda delil teşkil edip etmeyeceği konusunda âlimler tarihsel süreç içinde birbirinden farklı görüşler ortaya koymuşlardır. Böylelikle problem günümüze kadar devam etmiştir. Konu hakkında fikir yürüten âlimler, Kelâmcılar ve Selefiyye olmak üzere iki ana gruba ayrılmışlardır. Bu çalışmanın amacı, haber-i vâhid hakkındaki fikir ayrılıklarının nedenlerini, kelâmcılar tarafından bilgi edinme yollarından biri olarak kabul edilen haber-i sâdıkı dikkate alarak araştırmaktır. Abstract The purpose of the Kalam science is to prove the religious beliefs by using definitive evidences. For this reason, the Kalam scholars are inclined to Koran and the mutawatir reports which are included in the first part of Ahl As-Sunnah divided into two parts. In the Kalam science, it has been accepted that there are three ways of attaining knowledge. These are the five senses, intelligence, and precise reports. It is not the case that Islamic scholars have a disagreement on not only knowledges obtained through the five senses and intelligence but the value of mutawatir reports included in the first part of Ahl As-Sunnah. As of the second century of Hegira, the scholars have put forward different opinions about whether the value of imprecise reports will constitute an evidence in matters of faith in the historical process or not. Thus, the problem has continued to the present day. The scholars who speculate about the issue have been divided into two main groups as Kalam scholars and Salafism. The purpose of this study is to research the reasons for the disagreements on imprecise reports by taking precise reports into account, which has been accepted by Kalam scholars as one of the ways of attaining knowledge.

  1. Muestreo poblacional de Onychiurus armatus tullberg (Collembola: Onychiuridae en cultivos de clavel y crisantemo bajo invernadero Population sampllng of Oníehíurus armatus Tullberg (Collembola: onychiurioae within carnation and Crysanthemum crops in greenhouses

    Directory of Open Access Journals (Sweden)

    Roatta Jorge

    1989-12-01

    Full Text Available Durante el año 1984 se estudió la distribución poblacional de artrópodos en suelos de cultivos de clavel y crisantemo,
    cultivados bajo un invernadero comercial ubicado en la zona de Madrid, Cundinamarca. Se encontró una baja diversidad de artrópodos con dominancia de Onychíurus armatus Tullberq, el cual prefiere desarrollarse en la zona de rizósfera, de O a 20 cm de profundidad, aunque puede encontrarse a mayor profundidad. Se confirma que este colémbolo hace daño en las raíces de las plantas: afectando la altura y el peso de las plantas de crisantemo y disminuyendo la cantidad de esquejes producidos por plantas de clavel. La gravedad del daño depende
    de la densidad de colémbolos presentes.This study was done during 1984 in a commercial crops at the Bogotá Plateau. Low numbers of arthropods were found in
    the samplings. o. arma tus was the most abundant arthropod, located around the root area of carnation and chrysantemum
    plants, and usually between O and 20 cm in the soil. This species was shown to be a pest on carnation and chrysantemum roots, decreasing height and weight of chrysantemum plants and decreasing the number of cuttings produced by carnation plants. The amount of damage is determined by the number of individuals present in the population.

  2. Atypical location of extramedullary hematopoietic masses in thalassemia

    International Nuclear Information System (INIS)

    Gemenis, T.; Philippou, A.; Gouliamos, A.; Kalovidouris, A.; Papavasiliou, C.; Papacharalambus, X.; Panani, A.; Chalevelakis, G.; Raptis, S.

    1989-01-01

    A case of β-thalassemia with multiple foci of extramedullary hematopoiesis (EH) is reported. EH masses were demonstrated in the presacral and the costovertebral space. EH foci were also encountered in the spleen. (orig.) [de

  3. The Immunogenicity of a Biological Simulant: Strategies for the Improvement of Antibody-Based Detection

    National Research Council Canada - National Science Library

    Grahame, David A; Gencic, Simonida; Bronk, Burt V

    2005-01-01

    .... The bacterium Pantoea agglomerans (formerly Erwinia herbicola, Eh) presently is used to simulate vegetative biological agents, however, anti-Eh antibodies of high affinity and specificity are needed...

  4. Limerick BWR turbine control and protection system upgrade success

    International Nuclear Information System (INIS)

    Tang, C.K.; Pietryka, T.S.; Federico, P.A.; Williams, J.C.

    2015-01-01

    Westinghouse and Exelon have successfully implemented a digital electro-hydraulic control (DEHC) at Limerick BWR Unit 1 Station to perform the turbine control, protection and reactor pressure functions. The DEHC replaces analog controls and addressed system performance, obsolescence and reliability. This was a first-of-a-kind application for control and protection of the main turbine and BWR pressure control for the distributed control system utilized. The demolition of analog equipment, main control room and front standard modifications, and acceptance testing were completed on schedule during the normal 2014 outage. Key aspects of the project that facilitated this success will be discussed and presented. (author)

  5. Adaptive Sliding Mode Control for Hydraulic Drives

    DEFF Research Database (Denmark)

    Schmidt, Lasse; Andersen, Torben Ole; Pedersen, Henrik C.

    2013-01-01

    This paper presents a new adaptive sliding mode controller generally applicable for position tracking control of electro-hydraulic valve-cylinder drives (VCD’s). The proposed control scheme requires limited knowledge on system parameters, and employs only piston- and valve spool position feedback...... employing parameter adaption through a recursive algorithm is presented. This is based on a reduced order model approximation of a VCD with unmatched valve flow- and cylinder asymmetries. Bounds on parameters are obtained despite lack of parameter knowledge, and the proposed controller demonstrates improved...

  6. Implications of the degree of controllability of controlled plants in the sense of LQR optimal control

    Science.gov (United States)

    Xia, Yaping; Yin, Minghui; Zou, Yun

    2018-01-01

    In this paper, the relationship between the degree of controllability (DOC) of controlled plants and the corresponding quadratic optimal performance index in LQR control is investigated for the electro-hydraulic synchronising servo control systems and wind turbine systems, respectively. It is shown that for these two types of systems, the higher the DOC of a controlled plant is, the better the quadratic optimal performance index is. It implies that in some LQR controller designs, the measure of the DOC of a controlled plant can be used as an index for the optimisation of adjustable plant parameters, by which the plant can be controlled more effectively.

  7. Improvement of automatic control systems of high-power turbines of PAO tubroatom for nuclear power plants

    Science.gov (United States)

    Shvetsov, V. L.; Babaev, I. N.

    2017-09-01

    The main technical solutions applied by PAO Turboatom used as the compensatory measures at the increase of the period of nonstop operation of nuclear power plants' (NPP) turbines with VVER-1000 type reactors up to 18 months are (1) replacing the standard hydraulic speed controller with an electronic one, (2) introduction of overclocking protection, (3) modernization of units of stop-control valves of high pressures, (4) installation of locking dampers on the receiver tubes of turbines of the first and second modification, and (5) improving the quality of repairs by reviewing the requirements for their implementation. The introduction of complex diagnostics of a control system on the basis of automatic treatment of results of registration of working parameters of the turbine is allocated as a separate prospective direction. Using an electronic controller of speed makes it possible to simplify the procedure of its inclusion in work at the failure of an electro-hydraulic system of control and vice versa. The regimes of maintaining the turbine rotor speed, steam pressure on the outlet of turbine, and the positions of main servomotors were introduced into the functions of the electronic controller. An electronic controller of speed includes its own electro-hydraulic transducer, turbine rotor speed sensor, and sensors of the position of main servomotors. Into the functions of electro- hydraulic control system and electronic speed controller, the function of overclocking protection, which determines the formation of commands for stopping the turbine at the exceeding of both the defined level of rotation speed and the defined combination of achieved rotation speed and angular acceleration of rotor, was introduced. To simplify the correction of forces acting on the control valve cups, the design of the cups was changed, and it has the profiled inserts. The solutions proposed were implemented on K-1100-60/1500-2M turbines of Rostov NPP. From the composition of control system

  8. Limerick BWR turbine control and protection system upgrade success

    Energy Technology Data Exchange (ETDEWEB)

    Tang, C.K.; Pietryka, T.S.; Federico, P.A., E-mail: tangck@westinghouse.com, E-mail: pietryt@westinghouse, E-mail: federipa@westinghouse.com [Westinghouse Electric Company, LLC, Cranberry Township, PA (United States); Williams, J.C., E-mail: Jonathan.Williams@exeloncorp.com [Exelon Nuclear, Warrenville, IL (United States)

    2015-07-01

    Westinghouse and Exelon have successfully implemented a digital electro-hydraulic control (DEHC) at Limerick BWR Unit 1 Station to perform the turbine control, protection and reactor pressure functions. The DEHC replaces analog controls and addressed system performance, obsolescence and reliability. This was a first-of-a-kind application for control and protection of the main turbine and BWR pressure control for the distributed control system utilized. The demolition of analog equipment, main control room and front standard modifications, and acceptance testing were completed on schedule during the normal 2014 outage. Key aspects of the project that facilitated this success will be discussed and presented. (author)

  9. Modelling the High-speed Injector for Diesel ICE

    Science.gov (United States)

    Buryuk, V. V.; Kayukov, S. S.; Gorshkalev, A. A.; Belousov, A. V.; Gallyamov, R. E.; Zvyagintsev, V. A.

    2018-01-01

    The article describes the results of research on the option of improving the operation speed of the electro-hydraulically driven injectors (Common Rail) for diesel ICE. The injector investigated in this article is a modified serial injector Common Rail-type with solenoid. The model and the injector parameters are represented in the package LMS Imagine. Lab AMESim with the detailed description of the substantiation and background for the research. Following the research results, the advantages of the proposed approach to analysing the operation speed were detected with outlining the direction of future studies.

  10. The Design and Development of the Precision Planter Sowing Depth Control System

    Directory of Open Access Journals (Sweden)

    Liping WEN

    2014-01-01

    Full Text Available In view the accuracy requirements of sowing depth control for precision planter, we carried out the design and development of control system. This paper main includes the working principle of the control system, the hardware and software design of electro-hydraulic proportional control system. It also respectively explains the software programming of PLC, the software programming of touch screen. Practical application shows that this system has advantages of stable operation, high reliability, convenient operation and maintenance, with high promotion and use value.

  11. Effect of confining pressure on permeability behavior of Beishan granite

    International Nuclear Information System (INIS)

    Ma Like; Li Yunfeng; Zhao Xingguang; Tan Guohuan

    2012-01-01

    By using of the Electro-Hydraulic Servo-controlled Rock Mechanics Testing System (MTS 815.04) in the University of Hong Kong, a series of permeability tests were performed on specimens of Beishan granite at different confining pressures. The result indicates that: (1) there is a decrease of permeability due to progressive closure of initial microcracks and the corresponding volumetric strain is compressive when the confining pressures increase from 2.5 MPa to 15 MPa, (2) when the confining pressures decrease from 15 MPa to 2.5 MPa, there is an increase of permeability in this stage in relation with the volumetric dilation. (authors)

  12. Innovation on structure of all automatic multi-studs four synchronous installing machine used in PWR

    International Nuclear Information System (INIS)

    Zhu Qirong; Zou Xiyang

    2002-01-01

    First of all from structure bring forth many new ideas. New stud, nut and a brand-new installing machine have been designed. In main machine, the integrated gear mechanism simple in structure achieves synchronous turning function, instead of the precision, complicated, expensive manipulator or robot. In aspect of supervising and controlling, computer electro-hydraulic proportional control and advanced examine measure system have been designed to measure stress and extension of stud as tensioning. Mathematics model and transmit function have been built using theory of modern times fluid transmission and control. As a result four synchronous installing has been achieved

  13. Bulkhead Door – Critical Evacuation States

    Directory of Open Access Journals (Sweden)

    Flizikowski Józef

    2017-03-01

    Full Text Available The article is a preliminary to a modification concept of the sliding watertight bulkhead door used on ships and vessels. Hydraulic or electro-hydraulic drives used to move these doors require complicated and extended pressure installations with large amounts of hydraulic fluid. Well-known operational drawbacks of these installations include high level of noise and possibility of various leaks in the hydraulic system. Being the first in a series, the present article describes and analyses critical states which can take place during evacuation of people through openings in the watertight bulkhead doors on seagoing ships and vessels.

  14. A study of low-cost reliable actuators for light aircraft. Part A: Chapters 1-8

    Science.gov (United States)

    Eijsink, H.; Rice, M.

    1978-01-01

    An analysis involving electro-mechanical, electro-pneumatic, and electro-hydraulic actuators was performed to study which are compatible for use in the primary and secondary flight controls of a single engine light aircraft. Actuator characteristics under investigation include cost, reliability, weight, force, volumetric requirements, power requirements, response characteristics and heat accumulation characteristics. The basic types of actuators were compared for performance characteristics in positioning a control surface model and then were mathematically evaluated in an aircraft to get the closed loop dynamic response characteristics. Conclusions were made as to the suitability of each actuator type for use in an aircraft.

  15. Technology demonstrations in the Decontamination and Decommissioning Focus Area

    International Nuclear Information System (INIS)

    Bossart, S.J.

    1996-01-01

    This paper describes three large-scale demonstration projects sponsored jointly by the Decontamination and Decommissioning Focus Area (DDFA), and the three US Department of Energy (DOE) Operations Offices that successfully offered to deactivate or decommission (D ampersand D) one of its facilities using a combination of innovative and commercial D ampersand D technologies. The paper also includes discussions on recent technology demonstrations for an Advanced Worker Protection System, an Electrohydraulic Scabbling System, and a Pipe Explorer trademark. The references at the conclusion of this paper should be consulted for more detailed information about the large-scale demonstration projects and recent technology demonstrations sponsored by the DDFA

  16. Sharing Experiences within AREVA D and D Project Portfolio: Four Illustrations - 13049

    International Nuclear Information System (INIS)

    Chabeuf, Jean-Michel; Varet, Thierry; AREVA Site Value Development Business Unit, La Hague Site

    2013-01-01

    Over the past ten years, AREVA has performed D and D operations on a wide range of nuclear sites, such as Marcoule and La Hague recycling plants, to Cadarache MOX fuel fabrication plant or Veurey and Annecy metallic Uranium machining plants. Each site is different from the other but some lessons can be shared through this D and D portfolio. In that respect, knowledge management is one of AREVA D and D Technical Department main missions. Four illustrations demonstrate the interest of knowledge share. Waste management is one of the key activities in D and D; It requires a specific characterization methodology, adapted logistics, and optimized waste channels, all of which have been developed over the years by AREVA teams on the site of Marcoule while they are rather new to La Hague, whose main activity remains fuel reprocessing despite the launch of UP2 400 D and D program. The transfer of know how has thus been organized over the past two years. Plasma cutting has been used extensively in Marcoule for years, while prohibited on the site of La Hague following questions raised about the risks associated wit Ruthenium sublimation. La Hague Technical Department has thus developed an experimental protocol to quantify and contain the Ruthenium risk, the result of which will then be applied to Marcoule where the Ruthenium issue has appeared in recent operations. Commissioning and operating fission products evaporators is a rather standard activity on UP2 800 and UP3, while the associated experience has been decreasing in Marcoule following final shutdown in 1998. When the French atomic Energy commission decided to build and operate a new evaporator to concentrate rinsing effluents prior to vitrification in 2009, AREVA La Hague operators were mobilized to test and commission the new equipment, and train local operators. Concrete scabbling is the final stage prior to the free release of a nuclear facility. In the context of Veurey and Annecy final cleanup and declassification

  17. Sharing Experiences within AREVA D and D Project Portfolio: Four Illustrations - 13049

    Energy Technology Data Exchange (ETDEWEB)

    Chabeuf, Jean-Michel; Varet, Thierry [AREVA Site Value Development Business Unit, La Hague Site (France); AREVA Site Value Development Business Unit, La Hague Site

    2013-07-01

    Over the past ten years, AREVA has performed D and D operations on a wide range of nuclear sites, such as Marcoule and La Hague recycling plants, to Cadarache MOX fuel fabrication plant or Veurey and Annecy metallic Uranium machining plants. Each site is different from the other but some lessons can be shared through this D and D portfolio. In that respect, knowledge management is one of AREVA D and D Technical Department main missions. Four illustrations demonstrate the interest of knowledge share. Waste management is one of the key activities in D and D; It requires a specific characterization methodology, adapted logistics, and optimized waste channels, all of which have been developed over the years by AREVA teams on the site of Marcoule while they are rather new to La Hague, whose main activity remains fuel reprocessing despite the launch of UP2 400 D and D program. The transfer of know how has thus been organized over the past two years. Plasma cutting has been used extensively in Marcoule for years, while prohibited on the site of La Hague following questions raised about the risks associated wit Ruthenium sublimation. La Hague Technical Department has thus developed an experimental protocol to quantify and contain the Ruthenium risk, the result of which will then be applied to Marcoule where the Ruthenium issue has appeared in recent operations. Commissioning and operating fission products evaporators is a rather standard activity on UP2 800 and UP3, while the associated experience has been decreasing in Marcoule following final shutdown in 1998. When the French atomic Energy commission decided to build and operate a new evaporator to concentrate rinsing effluents prior to vitrification in 2009, AREVA La Hague operators were mobilized to test and commission the new equipment, and train local operators. Concrete scabbling is the final stage prior to the free release of a nuclear facility. In the context of Veurey and Annecy final cleanup and declassification

  18. ehřátý lidský kapitál. Současné pohrdání vědou a výzkumem nás bude pěkně mrzet

    Czech Academy of Sciences Publication Activity Database

    Jurajda, Štěpán

    2004-01-01

    Roč. 15, č. 37 (2004), s. 9-9 ISSN 0862-6545 R&D Projects: GA AV ČR KSK9058117 Institutional research plan: CEZ:AV0Z7085904 Keywords : human capital * science and research * Czech Republic Subject RIV: AH - Economics

  19. Epidémiologie des infections nosocomiales dues aux bactéries à Gram négatifs à l’unité de néonatologie de l’EHS de Tlemcen du 14 mai au 22 juin 2012

    OpenAIRE

    Yadi, Salima Nesma

    2014-01-01

    Résumé Introduction : Les infections nosocomiales posent un véritable problème de santé publique du fait de leur fréquence, leur gravité et leur coût socioéconomique. A part les pays développés, peu de pays disposent de statistiques nationales fiables en matière d’infection nosocomiale ; des discordances importantes peuvent s’observer d’une série à l’autre en fonction du pays et du type d’établissement. Objectif : Le but de notre étude est de déterminer l’incidence et ...

  20. Commentary on: "An integrated metabolic atlas of clear cell renal cell carcinoma." Hakimi AA, Reznik E, Lee CH, Creighton CJ, Brannon AR, Luna A, Aksoy BA, Liu EM, Shen R, Lee W, Chen Y, Stirdivant SM, Russo P, Chen YB, Tickoo SK, Reuter VE, Cheng EH, Sander C, Hsieh JJ.: Cancer Cell. 2016 Jan 11;29(1):104-16.

    Science.gov (United States)

    Lee, Byron H

    2017-09-01

    Dysregulated metabolism is a hallmark of cancer, manifested through alterations in metabolites. We performed metabolomic profiling on 138 matched clear cell renal cell carcinoma (ccRCC)/normal tissue pairs and found that ccRCC is characterized by broad shifts in central carbon metabolism, one-carbon metabolism, and antioxidant response. Tumor progression and metastasis were associated with metabolite increases in glutathione and cysteine/methionine metabolism pathways. We develop an analytic pipeline and visualization tool (metabolograms) to bridge the gap between TCGA transcriptomic profiling and our metabolomic data, which enables us to assemble an integrated pathway-level metabolic atlas and to demonstrate discordance between transcriptome and metabolome. Lastly, expression profiling was performed on a high-glutathione cluster, which corresponds to a poor-survival subgroup in the ccRCC TCGA cohort. Copyright © 2017 Elsevier Inc. All rights reserved.

  1. Environment, Health, and Safety - Construction Subcontractors Documents |

    Science.gov (United States)

    NREL Environment, Health, and Safety - Construction Subcontractors Documents Environment Environment, Health and Safety (EH&S) requirements are understood by construction subcontractors and with these requirements before submitting proposals and/or environment, health and safety plans for the

  2. Endocardial cushion defect

    Science.gov (United States)

    ... Philadelphia, PA: Elsevier; 2016:chap 426. Kouchoukos NT, Blackstone EH, Hanley FL, Kirklin JK. Atrioventricular septal defect. In: Kouchoukos NT, Blackstone EH, Hanley FL, Kirklin JK, eds. Kirklin/Barratt- ...

  3. 75 FR 4835 - Notice of Proposed Information Collection: Comment Request; FHA-Insured Mortgage Loan Servicing...

    Science.gov (United States)

    2010-01-29

    ... lender or the owner. Owners/Agents which have been cited with Exigent Health and Safety (EH&S... decent, safe, sanitary and in good repair. Agency form numbers, if applicable: None. Estimation of the...

  4. Cloning and partial characterization of Entamoeba histolytica PTPases

    International Nuclear Information System (INIS)

    Herrera-Rodriguez, Sara Elisa; Baylon-Pacheco, Lidia; Talamas-Rohana, Patricia; Rosales-Encina, Jose Luis

    2006-01-01

    Reversible protein tyrosine phosphorylation is an essential signal transduction mechanism that regulates cell growth, differentiation, mobility, metabolism, and survival. Two genes coding for protein tyrosine phophatases, designed EhPTPA and EhPTPB, were cloned from Entamoeba histolytica. EhPTPA and EhPTPB proteins showed amino acid sequence identity of 37%, both EhPTPases showed similarity with Dictyostelium discoideum and vertebrate trasmembranal PTPases. mRNA levels of EhPTPA gene are up-regulated in trophozoites recovered after 96 h of liver abscess development in the hamster model. EhPTPA protein expressed as a glutathione S-transferase fusion protein (GST::EhPTPA) showed enzymatic activity with p-nitrophenylphosphate as a substrate and was inhibited by PTPase inhibitors vanadate and molybdate. GST::EhPTPA protein selectively dephosphorylates a 130 kDa phosphotyrosine-containing protein in trophozoite cell lysates. EhPTPA gene codifies for a 43 kDa native protein. Up-regulation of EhPTPA expression suggests that EhPTPA may play an important role in the adaptive response of trophozoites during amoebic liver abscess development

  5. Analysis of Offshore Knuckle Boom Crane - Part Two: Motion Control

    Directory of Open Access Journals (Sweden)

    Morten K. Bak

    2013-10-01

    Full Text Available In this paper design of electro-hydraulic motion control systems for offshore knuckle boom cranes is discussed. The influence of the control valve bandwidth along with the ramp time for the control signal are investigated both analytically with simplified system models and numerically with an experimentally verified crane model. The results of both types of investigations are related to general design rules for selection of control valves and ramp times and the relevance of these design rules is discussed. Generally, they are useful but may be too conservative for offshore knuckle boom cranes. However, as demonstrated in the paper, the only proper way to determine this is to evaluate the motion control system design by means of simulation.

  6. Analysis of Offshore Knuckle Boom Crane - Part One: Modeling and Parameter Identification

    Directory of Open Access Journals (Sweden)

    Morten K. Bak

    2013-10-01

    Full Text Available This paper presents an extensive model of a knuckle boom crane used for pipe handling on offshore drilling rigs. The mechanical system is modeled as a multi-body system and includes the structural flexibility and damping. The motion control system model includes the main components of the crane's electro-hydraulic actuation system. For this a novel black-box model for counterbalance valves is presented, which uses two different pressure ratios to compute the flow through the valve. Experimental data and parameter identification, based on both numerical optimization and manual tuning, are used to verify the crane model. The demonstrated modeling and parameter identification techniques target the system engineer and takes into account the limited access to component data normally encountered by engineers working with design of hydraulic systems.

  7. Brake Performance Analysis of ABS for Eddy Current and Electrohydraulic Hybrid Brake System

    Directory of Open Access Journals (Sweden)

    Ren He

    2013-01-01

    Full Text Available This paper introduces an eddy current and electro-hydraulic hybrid brake system to solve problems such as wear, thermal failure, and slow response of traditional vehicle brake system. Mathematical model was built to calculate the torque of the eddy current brake system and hydraulic brake system and analyze the braking force distribution between two types of brake systems. A fuzzy controller on personal computer based on LabVIEW and Matlab was designed and a set of hardware in the loop system was constructed to validate and analyze the performance of the hybrid brake system. Through lots of experiments on dry and wet asphalt roads, the hybrid brake system achieves perfect performance on the experimental bench, the hybrid system reduces abrasion and temperature of the brake disk, response speed is enhanced obviously, fuzzy controller keeps high utilization coefficient due to the optimal slip ratio regulation, and the total brake time has a smaller decrease than traditional hydraulic brake system.

  8. Single-chip microcomputer based protection, diagnostic and recording system for longwall shearers

    Energy Technology Data Exchange (ETDEWEB)

    Heyduk, A.; Krasucki, F. (Politechnika Slaska, Gliwice (Poland). Katedra Elektryfikacji i Automatyzacji Gornictwa)

    1993-05-01

    Presents a concept of microcomputer-aided operation, protection, diagnostics and recording for shearer loaders. A two-stage mathematical model is suggested and explained. The model represents the thermal processes that determine the overcurrent protection of drive motors. Circuits for monitoring fuses, supply voltages, contacts, relays, contactors and electro-hydraulic distributors with the use of transoptors are shown. Recording characteristic operation parameters of a shearer loader during the 5 minutes before a failure is proposed. Protection, diagnosis and control functions are suggested as additional functions to the microcomputer-aided system of shearer loader control being developed at the Silesian Technical University. The system is based on the NECmicroPD 78310 microprocessor. 10 refs.

  9. A flight investigation of oscillating air forces: Equipment and technique

    Science.gov (United States)

    Reed, W. H., III

    1975-01-01

    The equipment and techniques are described which are to be used in a project aimed at measuring oscillating air forces and dynamic aeroelastic response of a swept wing airplane at high subsonic speeds. Electro-hydraulic inertia type shakers installed in the wing tips will excite various elastic airplane modes while the related oscillating chordwise pressures at two spanwise wing stations and the wing mode shapes are recorded on magnetic tape. The data reduction technique, following the principle of a wattmeter harmonic analyzer employed by Bratt, Wight, and Tilly, utilizes magnetic tape and high speed electronic multipliers to record directly the real and imaginary components of oscillatory data signals relative to a simple harmonic reference signal. Through an extension of this technique an automatic flight-flutter-test data analyzer is suggested in which vector plots of mechanical admittance or impedance would be plotted during the flight test.

  10. Wind turbine pitch control using ICPSO-PID algorithm

    DEFF Research Database (Denmark)

    Xu, Chang; Tian, Qiangqiang; Shen, Wen Zhong

    2013-01-01

    For the traditional simplified first-order pitch-control system model, it is difficult to describe a real dynamic characteristic of a variable pitch action system, thus a complete high order mathematical model has to be developed for the pitch control of wind turbine generation (WTG). In the paper...... controller parameters quickly; and the feed-forward controller for wind speed can improve dynamics of a pitch-control system; additionally the power controller can allow a wind turbine to have a constant power output as a wind speed is over the rated one. Compared with a conventional PID, the controller...... with ICPSO-PID algorithm has a smaller overshoot, a shorter tuning time and better robustness. The design method proposed in the paper can be applied in a practical electro-hydraulic pitch control system for WTG....

  11. Development of a remote controlled fatigue testing apparatus at elevated temperature in controlled environment

    International Nuclear Information System (INIS)

    Ohmi, Masao; Mimura, Hideaki; Ishii, Toshimitsu

    1996-02-01

    The fatigue characteristics of reactor structural materials at high temperature are necessary to be evaluated for ensuring the safety of the High Temperature engineering Test Reactor (HTTR). Especially, the high temperature test data on safety research such as low cycle fatigue property and crack propagation property for reactor pressure vessel material are important for the development of the HTTR. Responding to these needs, a remote controlled type fatigue testing machine has been developed and installed in a hot cell of JMTR Hot Laboratory to get the fatigue data of irradiated materials. The machine was developed modifying a commercially available electro-hydraulic servo type fatigue testing machine to withstand radiation and be remotely operated, and mainly consists of a testing machine frame, environment chamber, extensometer, actuator and vacuum exhaust system. It has been confirmed that the machine has good performance to obtain low cycle fatigue data through many demonstration tests on unirradiated and irradiated specimens. (author)

  12. A Novel Approach for Enhancement of Automobile Clutch Engagement Quality Using Mechatronics Based Automated Clutch System

    Science.gov (United States)

    Tripathi, K.

    2013-01-01

    In automated manual clutch (AMC) a mechatronic system controls clutch force trajectory through an actuator governed by a control system. The present study identifies relevant characteristics of this trajectory and their effects on driveline dynamics and engagement quality. A new type of force trajectory is identified which gives the good engagement quality. However this trajectory is not achievable through conventional clutch control mechanism. But in AMC a mechatronic system based on electro-hydraulic or electro-mechanical elements can make it feasible. A mechatronic system is presented in which a mechatronic add-on system can be used to implement the novel force trajectory, without the requirement of replacing the traditional diaphragm spring based clutch in a vehicle with manual transmission.

  13. Variable valve timing in a homogenous charge compression ignition engine

    Science.gov (United States)

    Lawrence, Keith E.; Faletti, James J.; Funke, Steven J.; Maloney, Ronald P.

    2004-08-03

    The present invention relates generally to the field of homogenous charge compression ignition engines, in which fuel is injected when the cylinder piston is relatively close to the bottom dead center position for its compression stroke. The fuel mixes with air in the cylinder during the compression stroke to create a relatively lean homogeneous mixture that preferably ignites when the piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. The present invention utilizes internal exhaust gas recirculation and/or compression ratio control to control the timing of ignition events and combustion duration in homogeneous charge compression ignition engines. Thus, at least one electro-hydraulic assist actuator is provided that is capable of mechanically engaging at least one cam actuated intake and/or exhaust valve.

  14. Enjoy driving without shifting gears; Spass ohne Schalten

    Energy Technology Data Exchange (ETDEWEB)

    Obst, M.

    1997-07-01

    The development criteria which are traditionally demanded at most are reduction of weight, fuel, material and cost. However, other criteria such as comfort, functionality and long lifetime have become the centre of interest during the last few years. This also applies for the development of transmission in the company Zahnradfabrik (ZF), Sarrebruck. The new four-step transmission system is supposed to achieve a very high shift comfort by an electro-hydraulic control system. The contribution provides some data about this transmission. (orig.) [Deutsch] Einsparungen an Gewicht, Kraftstoff, Material und Kosten sind traditionell die meistgeforderten Entwicklungskriterien. Doch draengen sich gerade in den letzten Jahren weitere Aspekte wie Komfort, Funktionalitaet und Langlebigkeit in den Mittelpunkt. So auch in der Getriebeentwicklung bei Zahnradfabrik (ZF). Mit einer elektro-hydraulischen Steuerung soll das neue Vierstufen-Getriebe eine sehr hohe Schaltqualitaet erreichen. Der Beitrag gibt dazu einige Daten. (orig.)

  15. A feedback control system for vibration of magnetostrictive plate subjected to follower force using sinusoidal shear

    Directory of Open Access Journals (Sweden)

    A. Ghorbanpour Arani

    2016-03-01

    Full Text Available In this research, the vibrational behavior of magnetostrictive plate (MsP as a smart component is studied. The plate is subjected to an external follower force and a magnetic field in which the vibration response of MsP has been investigated for both loading combinations. The velocity feedback gain parameter is evaluated to study the effect of magnetic field which is generated by the coil. Sinusoidal shear deformation theory is utilized due to its accuracy of polynomial function with respect to other plate theories. Equations of motion are derived using Hamilton’s principle and solved by differential quadrature method (DQM considering general boundary conditions. The effects of aspect ratio, thickness ratio, follower force and velocity feedback gain are investigated on the frequency response of MsP. Results indicate that magneto-mechanical coupling in MsM helps to control vibrational behaviors of systems such as electro-hydraulic actuator, wireless linear Motors and sensors.

  16. Design of the Driving and Clamp Rotation Hydraulic Control System for the Heavy Load Forging Manipulator

    Directory of Open Access Journals (Sweden)

    Li Geqiang

    2015-01-01

    Full Text Available The manipulator was equipped with full hydraulic drive. We designed the hydraulic systems for the driving and clamping rotation. We used a fuzzy PID control strategy to design the electro-hydraulic proportional control system. We built a united simulation model based on the co-simulation of MATLAB/Simulink and AMEsim. A mathematical model of the system was also established. We did separate simulations of the system’s dynamic characteristics for fast forging and normal forging working conditions. The parameters were optimized. The field test shows that the steady-state error of the hydraulic system is small and the system response is fast. The system’s rapid response speed, high precision, and stability under heavy load were realized.

  17. Static and Dynamic Performance Simulation of Direct-Acting Force Motor Valve

    Science.gov (United States)

    Ye, Xinghai; Ding, Jianjun; Zheng, Gang; Jiang, Kunpeng; Chen, Dongdong

    2017-07-01

    This work focuses on static and dynamic characteristics of direct-acting force motor valve. First, we analyzed the structure features and operating principle of the Mitsubishi-Hitachi force motor valve (FMV) and the operating principle of its internal permanent-magnet moving-coil force motor magnetic circuit, determined the transfer function of the FMV force motor system, and established a mathematical model for the system. Secondly, we established a static performance analysis model using the AMESIM software and utilized the model in combination with experimental results to analyze the effects of electro-hydraulic servo valve structural parameters on static characteristics. Lastly, we deduced the trajectory equation of the system, established the relationship between dynamic characteristic indexes and structural parameters, and analyzed the effects of different parameter values on the dynamic characteristics of the system. This research can provide a theoretical guidance for designing and manufacturing the FMV body.

  18. Fault Diagnosis of Hydraulic Servo Valve Based on Genetic Optimization RBF-BP Neural Network

    Directory of Open Access Journals (Sweden)

    Li-Ping FAN

    2014-04-01

    Full Text Available Electro-hydraulic servo valves are core components of the hydraulic servo system of rolling mills. It is necessary to adopt an effective fault diagnosis method to keep the hydraulic servo valve in a good work state. In this paper, RBF and BP neural network are integrated effectively to build a double hidden layers RBF-BP neural network for fault diagnosis. In the process of training the neural network, genetic algorithm (GA is used to initialize and optimize the connection weights and thresholds of the network. Several typical fault states are detected by the constructed GA-optimized fault diagnosis scheme. Simulation results shown that the proposed fault diagnosis scheme can give satisfactory effect.

  19. Automotive mechatronic systems. General developments and examples

    Energy Technology Data Exchange (ETDEWEB)

    Isermann, R. [Technische Univ. Darmstadt (Germany). Inst. fuer Automatisierungstechnik, FG Regelungstechnik und Prozessautomatisierung

    2006-08-15

    Automobiles are showing an increasing integration of mechanics with digital electronics and information processing. This integration is between the components (hardware) and by the information-driven functions (software), resulting in integrated systems called mechatronic systems. Their development involves finding an optimal balance between the basic mechanical structure, sensor and actuator implementation, communication, automatic information processing and overall control. This contribution summarizes some ongoing developments for mechatronic systems in automobiles, shows design approaches and examples and considers the various embedded control functions and systems integrity. Some examples of automotive mechatronic systems are shown in more detail. Great progress can be observed in braking systems (ABS, ESP), the first brake-by-wire electro-hydraulic brake system (EHB), steering systems (electrical power steering, active front steering) and active suspension systems. (orig.)

  20. Preferred design of transfer points

    Energy Technology Data Exchange (ETDEWEB)

    Firstbrook, J

    1983-06-01

    The paper reports the results of a study carried out at MRDE on the performance of transfer points. These sites still require a considerable deployment of manpower. The investigations were divided into 3 main sections: mineral handling; chute design; belt cleaning and spillage conveying. In order to achieve a sufficient level of reliability of a transfer system, it is considered that the coal size should not be greater than 250 mm. Different designs of gravity transfer chute were studied and 3 basic designs emerged as being effective : dump chute, curved site entry, and asymmetric side entry. Selection is dependent on conveyor sizes, speeds, and mineral throughput. Individual belt cleaners are not sufficient to clean belts carrying typical run-of-mine material: two cleaners followed by a set of squeeze rollers are recommended. Several designs of spillage conveyor were investigated; at the present time the electro/hydraulic type appears to be the most satisfactory.

  1. Fault Recoverability Analysis via Cross-Gramian

    DEFF Research Database (Denmark)

    Shaker, Hamid Reza

    2016-01-01

    Engineering systems are vulnerable to different kinds of faults. Faults may compromise safety, cause sub-optimal operation and decline in performance if not preventing the whole system from functioning. Fault tolerant control (FTC) methods ensure that the system performance maintains within...... with feedback control. Fault recoverability provides important and useful information which could be used in analysis and design. However, computing fault recoverability is numerically expensive. In this paper, a new approach for computation of fault recoverability for bilinear systems is proposed...... approach for computation of fault recoverability is proposed which reduces the computational burden significantly. The proposed results are used for an electro-hydraulic drive to reveal the redundant actuating capabilities in the system....

  2. Computer controlled experimental device for investigations of tribological influences in sheet metal forming

    Directory of Open Access Journals (Sweden)

    Milan Djordjevic

    2012-05-01

    Full Text Available Sheet metal forming, especially deep drawing process, is influenced by many factors. Blank holding force and drawbead displacement are two of them that can be controlled during the forming process. For this purpose, electro-hydraulic computerized sheet-metal strip sliding device has been constructed. Basic characteristic of this device is realization of variable contact pressure and drawbead height as functions of time or stripe displacement. There are both, pressure and drawbead, ten linear and nonlinear functions. Additional features consist of the ability to measure drawing force, contact pressure, drawbead displacement etc. Presented in the paper are the device overview and the first results of steel sheet stripe sliding over rounded  drawbead.

  3. COMPUTER CONTROLLED EXPERIMENTAL DEVICE FOR INVESTIGATIONS OF TRIBOLOGICAL INFLUENCES IN SHEET METAL FORMING

    Directory of Open Access Journals (Sweden)

    Tomislav Vujinović

    2012-05-01

    Full Text Available Sheet metal forming, especially deep drawing process is influenced by many factors. Blank holding force and drawbead displacement are two of them that can be controlled during the forming process.For this purpose, an electro-hydraulic computerized sheet-metal strip sliding device has been constructed. The basic characteristic of this device is realization of variable contact pressure and drawbead height as functions of time or stripe displacement. There are both, pressure and drawbead, ten linear and nonlinear functions. Additional features consist of the ability to measure drawing force, contact pressure, drawbead displacement etc.The device overview and first results of steel sheet stripe sliding over rounded drawbead are presented in the paper.

  4. Robotic excavator trajectory control using an improved GA based PID controller

    Science.gov (United States)

    Feng, Hao; Yin, Chen-Bo; Weng, Wen-wen; Ma, Wei; Zhou, Jun-jing; Jia, Wen-hua; Zhang, Zi-li

    2018-05-01

    In order to achieve excellent trajectory tracking performances, an improved genetic algorithm (IGA) is presented to search for the optimal proportional-integral-derivative (PID) controller parameters for the robotic excavator. Firstly, the mathematical model of kinematic and electro-hydraulic proportional control system of the excavator are analyzed based on the mechanism modeling method. On this basis, the actual model of the electro-hydraulic proportional system are established by the identification experiment. Furthermore, the population, the fitness function, the crossover probability and mutation probability of the SGA are improved: the initial PID parameters are calculated by the Ziegler-Nichols (Z-N) tuning method and the initial population is generated near it; the fitness function is transformed to maintain the diversity of the population; the probability of crossover and mutation are adjusted automatically to avoid premature convergence. Moreover, a simulation study is carried out to evaluate the time response performance of the proposed controller, i.e., IGA based PID against the SGA and Z-N based PID controllers with a step signal. It was shown from the simulation study that the proposed controller provides the least rise time and settling time of 1.23 s and 1.81 s, respectively against the other tested controllers. Finally, two types of trajectories are designed to validate the performances of the control algorithms, and experiments are performed on the excavator trajectory control experimental platform. It was demonstrated from the experimental work that the proposed IGA based PID controller improves the trajectory accuracy of the horizontal line and slope line trajectories by 23.98% and 23.64%, respectively in comparison to the SGA tuned PID controller. The results further indicate that the proposed IGA tuning based PID controller is effective for improving the tracking accuracy, which may be employed in the trajectory control of an actual excavator.

  5. INTEGRATED ROBOT-HUMAN CONTROL IN MINING OPERATIONS

    Energy Technology Data Exchange (ETDEWEB)

    George Danko

    2005-04-01

    This report contains a detailed description of the work conducted in the first year of the project on Integrated Robot-Human Control in Mining Operations at University of Nevada, Reno. This project combines human operator control with robotic control concepts to create a hybrid control architecture, in which the strengths of each control method are combined to increase machine efficiency and reduce operator fatigue. The kinematics reconfiguration type differential control of the excavator implemented with a variety of ''software machine kinematics'' is the key feature of the project. This software re-configured excavator is more desirable to execute a given digging task. The human operator retains the master control of the main motion parameters, while the computer coordinates the repetitive movement patterns of the machine links. These repetitive movements may be selected from a pre-defined family of trajectories with different transformations. The operator can make adjustments to this pattern in real time, as needed, to accommodate rapidly-changing environmental conditions. A Bobcat{reg_sign} 435 excavator was retrofitted with electro-hydraulic control valve elements. The modular electronic control was tested and the basic valve characteristics were measured for each valve at the Robotics Laboratory at UNR. Position sensors were added to the individual joint control actuators, and the sensors were calibrated. An electronic central control system consisting of a portable computer, converters and electronic driver components was interfaced to the electro-hydraulic valves and position sensors. The machine is operational with or without the computer control system depending on whether the computer interface is on or off. In preparation for emulated mining tasks tests, typical, repetitive tool trajectories during surface mining operations were recorded at the Newmont Mining Corporation's ''Lone Tree'' mine in Nevada.

  6. Giat Industries selected for construction of the "Very Large Telescope"

    Science.gov (United States)

    1995-06-01

    Versailles-Satory (France) May 31, 1995 - Giat Industries has just obtained a contract from the European Southern Observatory (ESO) for the construction of the primary and tertiary mirror supports and the positioning apparatus of the world's largest optical telescope. This contract, worth almost 140 million francs, represents over 100,000 hours of work. It was won by Gitech, a division of Giat Industries, in collaboration with the Sfim group, following an international competition between the largest European groups in the space field. Gitech is charged with the development of civil and military industrial equipment for the Giat Industries group, in particular in high technology fields. The VLT (Very Large Telescope) will be installed in Chile before the year 2000; the delivery schedule provides for reception of the first assembly in May 1997. It will consist of four telescopes of 8.2m diameter, providing, in its most powerful configuration, a close-up view of an object measuring one meter on the surface of the moon. The cell, built by Gitech, is one of the key parts of the telescope. It mainly consists of a very rigid metal structure and an electro-hydraulic system of more that 200 hydraulic jacks and 150 electrically-controlled jacks linking the metallic structure to the mirror. This structure, produced to an original design of laser-welded steel chambers, weighs less than 10 tonnes and will support over 37 tonnes of mirror and equipment, while guaranteeing precise positioning to within a micron. The electro-hydraulic jack system, manufactured in collaboration with the Sfim group, will support and position the mirror, and correct its geometry by applying a precise distribution of forces to its rear. The assembly is designed to meet the requirements of para-seismic safety. Gitech is also producing the computerised control system to ensure the operation and the reliability of the assembly.

  7. Single residue mutation in active site of serine acetyltransferase isoform 3 from Entamoeba histolytica assists in partial regaining of feedback inhibition by cysteine.

    Directory of Open Access Journals (Sweden)

    Sudhir Kumar

    Full Text Available The cysteine biosynthetic pathway is essential for survival of the protist pathogen Entamoeba histolytica, and functions by producing cysteine for countering oxidative attack during infection in human hosts. Serine acetyltransferase (SAT and O-acetylserine sulfhydrylase (OASS are involved in cysteine biosynthesis and are present in three isoforms each. While EhSAT1 and EhSAT2 are feedback inhibited by end product cysteine, EhSAT3 is nearly insensitive to such inhibition. The active site residues of EhSAT1 and of EhSAT3 are identical except for position 208, which is a histidine residue in EhSAT1 and a serine residue in EhSAT3. A combination of comparative modeling, multiple molecular dynamics simulations and free energy calculation studies showed a difference in binding energies of native EhSAT3 and of a S208H-EhSAT3 mutant for cysteine. Mutants have also been generated in vitro, replacing serine with histidine at position 208 in EhSAT3 and replacing histidine 208 with serine in EhSAT1. These mutants showed decreased affinity for substrate serine, as indicated by K(m, compared to the native enzymes. Inhibition kinetics in the presence of physiological concentrations of serine show that IC50 of EhSAT1 increases by about 18 folds from 9.59 µM for native to 169.88 µM for H208S-EhSAT1 mutant. Similar measurements with EhSAT3 confirm it to be insensitive to cysteine inhibition while its mutant (S208H-EhSAT3 shows a gain of cysteine inhibition by 36% and the IC50 of 3.5 mM. Histidine 208 appears to be one of the important residues that distinguish the serine substrate from the cysteine inhibitor.

  8. Finite Element-Galerkin Approximation of the Eigenvalues of Eigenvectors of Selfadjoint Problems

    Science.gov (United States)

    1988-07-01

    l’ "k, + 1. Combining (3.20), (3.22), and the fact that I-Eh(Ak ) and Ph are orthogonal projections we have I(I-Eh(Xk,)) PhUB 5 Si (I-Eh(xk)) PhT(Ph-I...Its adjoint are equal. (3.23) implies Hf(I-Eh(1kI )Ph)u{1B - P(IPh)UIBI 5 I(I-Eh(Ak )) PhuB -< d i ii ( Ph- I )T II H B_--H,3 1(P h- I ) u liB , and

  9. En-Vac Robotic Wall Scabbler. Innovative Technology Summary Report

    International Nuclear Information System (INIS)

    2001-01-01

    The U.S. Department of Energy (DOE) continually seeks safer and more cost-effective technologies for use in decontamination and decommissioning (D and D) of nuclear facilities. To this end, the Deactivation and Decommissioning Focus Area (DDFA) of the DOE's Office of Science and Technology (OST) sponsors Large-Scale Demonstration and Deployment Projects (LSDDP). At these LSDDPs, developers and vendors of improved or innovative technologies showcase products that are potentially beneficial to DOE's projects and to others in the D and D community. Benefits sought include decreased health and safety risks to personnel and the environment, increased productivity, and decreased cost of operation. The Idaho National Engineering and Environmental Laboratory (INEEL) LSDDP generated a list of statements defining specific needs or problems where improved technology could be incorporated into ongoing D and D tasks. One of the stated needs was for a Robotic Wall Scabbler that would reduce costs and shorten schedules in DOE's Decommissioning Project. This demonstration investigated the associated costs and time required to remove paint from the Test Area North (TAN-607) Decontamination Shop walls by comparing the En-vac Robotic Wall Scabbler against the baseline technology. The baseline technologies consist of the Pentek Vac Pac System with the Pentek Rotopeen and Needle Gun hand-held attachments. This system only removes paint from the surface of concrete. Innovative Technology The En-vac Robotic Wall Scabbler is a remote-controlled scabbling unit with individually motor-controlled wheels that moves horizontally and vertically along floors, walls, and ceilings, adhering to the surface with the help of a high-vacuum suction created at its base (see Figures 1 and 2). The complete En-vac Blasting System consists of the En-vac robot, a recycling unit, a filter, and a vacuum unit, and uses an abrasive, steel-grit blasting technology for the scabbling process. By comparison, this

  10. Modular turbine airfoil and platform assembly with independent root teeth

    Science.gov (United States)

    Campbell, Christian X; Davies, Daniel O; Eng, Darryl

    2013-07-30

    A turbine airfoil (22E-H) extends from a shank (23E-H). A platform (30E-H) brackets or surrounds a first portion of the shank (23E-H). Opposed teeth (33, 35) extend laterally from the platform (30E-H) to engage respective slots (50) in a disk. Opposed teeth (25, 27) extend laterally from a second portion of the shank (29) that extends below the platform (30E-H) to engage other slots (52) in the disk. Thus the platform (30E-H) and the shank (23E-H) independently support their own centrifugal loads via their respective teeth. The platform may be formed in two portions (32E-H, 34E-H), that are bonded to each other at matching end-walls (37) and/or via pins (36G) passing through the shank (23E-H). Coolant channels (41, 43) may pass through the shank beside the pins (36G).

  11. Clinical significance of changes and ratio imbalance of neuropeptide Y and neurotensin in patients with essential hypertension

    International Nuclear Information System (INIS)

    Ji Wenxin; Zhang Yuanzhuo; Qiu Jie; Qin Ling

    2006-01-01

    Objective: To study the effects of changes of neuropeptide Y (NPY) and neurotensin (NT) concentrations in plasma and their ratio imbalance on the incidence of essential hypertension (EH). Methods: NPY and NT in plasma in 176 patients with EH were measured with radioimmunoassay (RIA). Results: NPY in the EH patients was higher than that in the normal subjects (P<0.01), and went up with the aggravation of the patients' condition (P<0.01). NT in the EH patients was lower compared with the normal subjects (P<0.01), and went down with the aggravation of the patients' condition (P<0.01). NPY/NT in the EH patients was higher than that in the normal subjects (P<0.01), and was accordant with patients' condition. Conclusion: NPY and NT are involved in the incidence of EH. The ratio imbalance of NPY/NT may be one of the factors causing EH. (authors)

  12. Innovative technology summary report: Concrete grinder

    International Nuclear Information System (INIS)

    1998-09-01

    The Flex concrete grinder is a lightweight, hand-held concrete and coating removal system used for decontaminating or stripping concrete surfaces. The US Department of Energy has successfully demonstrated it for decontaminating walls and floors for free release surveys prior to demolition work. The grinder is an electric-powered tool with a vacuum port for dust extraction and a diamond grinding wheel. The grinder is suitable for flat or slightly curved surfaces and results in a smooth surface, which makes release surveys more reliable. The grinder is lightweight and produces very little vibration, thus reducing worker fatigue. The grinder is more efficient than traditional baseline, tools at removing contamination from concrete surfaces (more than four times faster than hand-held pneumatic scabbling and scaling tools). Grinder consumables (i.e., replacement diamond grinding wheel) are more expensive than the replacement carbide parts for the scaler and scabbler. However, operating costs are outweighed by the lower purchase price of the grinder (50% of the price of the baseline scaler and 8% of the price of the baseline scabbler). Overall, the concrete grinder is an attractive alternative to traditional scabbling and scaling pneumatic tools. To this end, in July 1998, the outer rod room exposed walls of the Safe Storage Enclosure (SSE), an area measuring approximately 150 m 2 , may be decontaminated with the hand-held grinder. This concrete grinder technology was demonstrated for the first time at the DOE's Hanford Site. Decontamination of a sample room walls was performed at the C Reactor to free release the walls prior to demolition. The demonstration was conducted by onsite D and D workers, who were instructed by the vendor prior to and during the demonstration

  13. Impact of Early Head Start in North Carolina on Dental Care Use Among Children Younger Than 3 Years.

    Science.gov (United States)

    Burgette, Jacqueline M; Preisser, John S; Weinberger, Morris; King, Rebecca S; Lee, Jessica Y; Rozier, R Gary

    2017-04-01

    To examine the effects of North Carolina Early Head Start (EHS), an early education program for low-income children younger than 3 years and their families, on dental care use among children. We performed a quasi-experimental study in which we interviewed 479 EHS and 699 non-EHS parent-child dyads at baseline (2010-2012) and at a 24-month follow-up (2012-2014). We estimated the effects of EHS participation on the probability of having a dental care visit after controlling for baseline dental care need and use and a propensity score covariate; we included random effects to account for EHS program clustering. The odds of having a dental care visit of any type (adjusted odds ratio [OR] = 2.5; 95% confidence interval [CI] = 1.74, 3.48) and having a preventive dental visit (adjusted OR = 2.6; 95% CI = 1.84, 3.63) were higher among EHS children than among non-EHS children. In addition, the adjusted mean number of dental care visits among EHS children was 1.3 times (95% CI = 1.17, 1.55) the mean number among non-EHS children. This study is the first, to our knowledge, to demonstrate that EHS participation increases dental care use among disadvantaged young children.

  14. Diffusive scattering of electrons by electron holes around injection fronts

    Science.gov (United States)

    Vasko, I. Y.; Agapitov, O. V.; Mozer, F. S.; Artemyev, A. V.; Krasnoselskikh, V. V.; Bonnell, J. W.

    2017-03-01

    Van Allen Probes have detected nonlinear electrostatic spikes around injection fronts in the outer radiation belt. These spikes include electron holes (EH), double layers, and more complicated solitary waves. We show that EHs can efficiently scatter electrons due to their substantial transverse electric fields. Although the electron scattering driven by EHs is diffusive, it cannot be evaluated via the standard quasi-linear theory. We derive analytical formulas describing local electron scattering by a single EH and verify them via test particle simulations. We show that the most efficiently scattered are gyroresonant electrons (crossing EH on a time scale comparable to the local electron gyroperiod). We compute bounce-averaged diffusion coefficients and demonstrate their dependence on the EH spatial distribution (latitudinal extent and spatial filling factor) and individual EH parameters (amplitude of electrostatic potential, velocity, and spatial scales). We show that EHs can drive pitch angle scattering of ≲5 keV electrons at rates 10-2-10-4 s-1 and, hence, can contribute to electron losses and conjugated diffuse aurora brightenings. The momentum and pitch angle scattering rates can be comparable, so that EHs can also provide efficient electron heating. The scattering rates driven by EHs at L shells L ˜ 5-8 are comparable to those due to chorus waves and may exceed those due to electron cyclotron harmonics.

  15. Characteristic symptoms and associated features of exploding head syndrome in undergraduates.

    Science.gov (United States)

    Sharpless, Brian A

    2018-03-01

    Background Exploding head syndrome (EHS) is characterized by loud noises or a sense of explosion in the head during sleep transitions. Though relatively common, little is known about its characteristic symptoms or associated features. Methods A cross-sectional study of 49 undergraduates with EHS was performed. A clinical interview established diagnosis. Results The most common accompanying symptoms were tachycardia, fear, and muscle jerks/twitches with the most severe associated with respiration difficulties. Visual phenomena were more common than expected (27%). EHS episodes were perceived as having a random course, but were most likely to occur during wake-sleep transitions and when sleeping in a supine position. Only 11% reported EHS to a professional, and 8% of those with recurrent EHS attempted to prevent episodes. Conclusions EHS episodes are complex (Mean (M) = 4.5 additional symptoms), often multisensorial, and usually associated with clinically-significant fear. They are rarely reported to professionals and treatment approaches are limited.

  16. Heavy metal exposure in patients suffering from electromagnetic hypersensitivity

    Energy Technology Data Exchange (ETDEWEB)

    Ghezel-Ahmadi, David, E-mail: david.ahmadi@web.de [Department of Psychiatry, University of Mainz (Germany); Engel, Alice; Weidemann, Joerg [Department of Psychiatry, University of Mainz (Germany); Budnik, Lygia Therese; Baur, Xaver [Institute for Occupational Medicine and Maritime Medicine (ZfAM), University of Hamburg (Germany); Frick, Ulrich [Department of Psychiatry, University of Regensburg (Germany); Department of Healthcare Management, Carinthia University of Applied Sciences (Austria); Hauser, Simone [Department of Psychiatry, University of Regensburg (Germany); Dahmen, Norbert [Department of Psychiatry, University of Mainz (Germany)

    2010-01-15

    Background: Risks from electromagnetic devices are of considerable concern. Electrohypersensitive (EHS) persons attribute a variety of rather unspecific symptoms to the exposure to electromagnetic fields. The pathophysiology of EHS is unknown and therapy remains a challenge. Objectives: Heavy metal load has been discussed as a potential factor in the symptomatology of EHS patients. The main objective of the study was to test the hypothesis of a link between EHS and heavy metal exposure. Methods: We measured lead, mercury and cadmium concentrations in the blood of 132 patients (n = 42 males and n = 90 females) and 101 controls (n = 34 males and n = 67 females). Results: Our results show that heavy metal load is of no concern in most cases of EHS but might play a role in exceptional cases. Conclusions: The data do not support the general advice to heavy metal detoxification in EHS.

  17. Heavy metal exposure in patients suffering from electromagnetic hypersensitivity

    International Nuclear Information System (INIS)

    Ghezel-Ahmadi, David; Engel, Alice; Weidemann, Joerg; Budnik, Lygia Therese; Baur, Xaver; Frick, Ulrich; Hauser, Simone; Dahmen, Norbert

    2010-01-01

    Background: Risks from electromagnetic devices are of considerable concern. Electrohypersensitive (EHS) persons attribute a variety of rather unspecific symptoms to the exposure to electromagnetic fields. The pathophysiology of EHS is unknown and therapy remains a challenge. Objectives: Heavy metal load has been discussed as a potential factor in the symptomatology of EHS patients. The main objective of the study was to test the hypothesis of a link between EHS and heavy metal exposure. Methods: We measured lead, mercury and cadmium concentrations in the blood of 132 patients (n = 42 males and n = 90 females) and 101 controls (n = 34 males and n = 67 females). Results: Our results show that heavy metal load is of no concern in most cases of EHS but might play a role in exceptional cases. Conclusions: The data do not support the general advice to heavy metal detoxification in EHS.

  18. Seasonal variation of the underground cosmic muon flux observed at Daya Bay

    Science.gov (United States)

    An, F. P.; Balantekin, A. B.; Band, H. R.; Bishai, M.; Blyth, S.; Cao, D.; Cao, G. F.; Cao, J.; Chan, Y. L.; Chang, J. F.; Chang, Y.; Chen, H. S.; Chen, Q. Y.; Chen, S. M.; Chen, Y. X.; Chen, Y.; Cheng, J.; Cheng, Z. K.; Cherwinka, J. J.; Chu, M. C.; Chukanov, A.; Cummings, J. P.; Ding, Y. Y.; Diwan, M. V.; Dolgareva, M.; Dove, J.; Dwyer, D. A.; Edwards, W. R.; Gill, R.; Gonchar, M.; Gong, G. H.; Gong, H.; Grassi, M.; Gu, W. Q.; Guo, L.; Guo, X. H.; Guo, Y. H.; Guo, Z.; Hackenburg, R. W.; Hans, S.; He, M.; Heeger, K. M.; Heng, Y. K.; Higuera, A.; Hsiung, Y. B.; Hu, B. Z.; Hu, T.; Huang, E. C.; Huang, H. X.; Huang, X. T.; Huber, P.; Huo, W.; Hussain, G.; Jaffe, D. E.; Jen, K. L.; Jetter, S.; Ji, X. P.; Ji, X. L.; Jiao, J. B.; Johnson, R. A.; Jones, D.; Kang, L.; Kettell, S. H.; Khan, A.; Kohn, S.; Kramer, M.; Kwan, K. K.; Kwok, M. W.; Kwok, T.; Langford, T. J.; Lau, K.; Lebanowski, L.; Lee, J.; Lee, J. H. C.; Lei, R. T.; Leitner, R.; Li, C.; Li, D. J.; Li, F.; Li, G. S.; Li, Q. J.; Li, S.; Li, S. C.; Li, W. D.; Li, X. N.; Li, X. Q.; Li, Y. F.; Li, Z. B.; Liang, H.; Lin, C. J.; Lin, G. L.; Lin, S.; Lin, S. K.; Lin, Y.-C.; Ling, J. J.; Link, J. M.; Littenberg, L.; Littlejohn, B. R.; Liu, J. L.; Liu, J. C.; Loh, C. W.; Lu, C.; Lu, H. Q.; Lu, J. S.; Luk, K. B.; Ma, X. Y.; Ma, X. B.; Ma, Y. Q.; Malyshkin, Y.; Martinez Caicedo, D. A.; McDonald, K. T.; McKeown, R. D.; Mitchell, I.; Nakajima, Y.; Napolitano, J.; Naumov, D.; Naumova, E.; Ngai, H. Y.; Ochoa-Ricoux, J. P.; Olshevskiy, A.; Pan, H.-R.; Park, J.; Patton, S.; Pec, V.; Peng, J. C.; Pinsky, L.; Pun, C. S. J.; Qi, F. Z.; Qi, M.; Qian, X.; Qiu, R. M.; Raper, N.; Ren, J.; Rosero, R.; Roskovec, B.; Ruan, X. C.; Sebastiani, C.; Steiner, H.; Sun, J. L.; Tang, W.; Taychenachev, D.; Treskov, K.; Tsang, K. V.; Tull, C. E.; Viaux, N.; Viren, B.; Vorobel, V.; Wang, C. H.; Wang, M.; Wang, N. Y.; Wang, R. G.; Wang, W.; Wang, X.; Wang, Y. F.; Wang, Z.; Wang, Z.; Wang, Z. M.; Wei, H. Y.; Wen, L. J.; Whisnant, K.; White, C. G.; Whitehead, L.; Wise, T.; Wong, H. L. H.; Wong, S. C. F.; Worcester, E.; Wu, C.-H.; Wu, Q.; Wu, W. J.; Xia, D. M.; Xia, J. K.; Xing, Z. Z.; Xu, J. L.; Xu, Y.; Xue, T.; Yang, C. G.; Yang, H.; Yang, L.; Yang, M. S.; Yang, M. T.; Yang, Y. Z.; Ye, M.; Ye, Z.; Yeh, M.; Young, B. L.; Yu, Z. Y.; Zeng, S.; Zhan, L.; Zhang, C.; Zhang, C. C.; Zhang, H. H.; Zhang, J. W.; Zhang, Q. M.; Zhang, X. T.; Zhang, Y. M.; Zhang, Y. X.; Zhang, Y. M.; Zhang, Z. J.; Zhang, Z. Y.; Zhang, Z. P.; Zhao, J.; Zhou, L.; Zhuang, H. L.; Zou, J. H.

    2018-01-01

    The Daya Bay Experiment consists of eight identically designed detectors located in three underground experimental halls named as EH1, EH2, EH3, with 250, 265 and 860 meters of water equivalent vertical overburden, respectively. Cosmic muon events have been recorded over a two-year period. The underground muon rate is observed to be positively correlated with the effective atmospheric temperature and to follow a seasonal modulation pattern. The correlation coefficient α, describing how a variation in the muon rate relates to a variation in the effective atmospheric temperature, is found to be αEH1 = 0.362±0.031, αEH2 = 0.433±0.038 and αEH3 = 0.641±0.057 for each experimental hall.

  19. Evaluation of fish models of soluble epoxide hydrolase inhibition.

    OpenAIRE

    Newman, J W; Denton, D L; Morisseau, C; Koger, C S; Wheelock, C E; Hinton, D E; Hammock, B D

    2001-01-01

    Substituted ureas and carbamates are mechanistic inhibitors of the soluble epoxide hydrolase (sEH). We screened a set of chemicals containing these functionalities in larval fathead minnow (Pimphales promelas) and embryo/larval golden medaka (Oryzias latipes) models to evaluate the utility of these systems for investigating sEH inhibition in vivo. Both fathead minnow and medaka sEHs were functionally similar to the tested mammalian orthologs (murine and human) with respect to substrate hydrol...

  20. Non-compensation of an electromagnetic compartment of a combined calorimeter

    International Nuclear Information System (INIS)

    Kil'chitskij, Yu.A.; Kuz'min, M.V.; Vinogradov, V.B.

    1999-01-01

    The method of extraction of the e/h ratio, the degree of noncompensation of the electromagnetic compartment of the ATLAS barrel combined prototype calorimeter is suggested. The e/h ratio of 1.74 ± 0.04 has been determined on the basis of the 1996 combined calorimeter test beam data. This value agrees with the prediction that e/h > 1.7 for this electromagnetic calorimeter

  1. Environmental Development Plan: uranium mining, milling, and conversion

    International Nuclear Information System (INIS)

    1979-08-01

    This Environmental Development Plan (EDP) identifies the planning and management requirements and schedules needed to evaluate and assess the environmental, health, and safety (EH and S) aspects of the uranium mining, milling, and conversion technologies. The plan represents the collective perceptions of EH and S concerns and requirements and knowledge of ongoing research programs of most of the Federal agencies involved in significant EH and S R and D program management, standards setting, or regulatory activities associated with uranium mining, milling, and conversion

  2. Lysophosphatidic acids are new substrates for the phosphatase domain of soluble epoxide hydrolase[S

    OpenAIRE

    Oguro, Ami; Imaoka, Susumu

    2012-01-01

    Soluble epoxide hydrolase (sEH) is a bifunctional enzyme that has a C-terminus epoxide hydrolase domain and an N-terminus phosphatase domain. The endogenous substrates of epoxide hydrolase are known to be epoxyeicosatrienoic acids, but the endogenous substrates of the phosphatase activity are not well understood. In this study, to explore the substrates of sEH, we investigated the inhibition of the phosphatase activity of sEH toward 4-methylumbelliferyl phosphate by using lecithin and its hyd...

  3. A new piezoelectric energy harvesting design concept: multimodal energy harvesting skin.

    Science.gov (United States)

    Lee, Soobum; Youn, Byeng D

    2011-03-01

    This paper presents an advanced design concept for a piezoelectric energy harvesting (EH), referred to as multimodal EH skin. This EH design facilitates the use of multimodal vibration and enhances power harvesting efficiency. The multimodal EH skin is an extension of our previous work, EH skin, which was an innovative design paradigm for a piezoelectric energy harvester: a vibrating skin structure and an additional thin piezoelectric layer in one device. A computational (finite element) model of the multilayered assembly - the vibrating skin structure and piezoelectric layer - is constructed and the optimal topology and/or shape of the piezoelectric layer is found for maximum power generation from multiple vibration modes. A design rationale for the multimodal EH skin was proposed: designing a piezoelectric material distribution and external resistors. In the material design step, the piezoelectric material is segmented by inflection lines from multiple vibration modes of interests to minimize voltage cancellation. The inflection lines are detected using the voltage phase. In the external resistor design step, the resistor values are found for each segment to maximize power output. The presented design concept, which can be applied to any engineering system with multimodal harmonic-vibrating skins, was applied to two case studies: an aircraft skin and a power transformer panel. The excellent performance of multimodal EH skin was demonstrated, showing larger power generation than EH skin without segmentation or unimodal EH skin.

  4. Epithelioid hemangioma of brachial artery: report of a case and review of the literature

    Directory of Open Access Journals (Sweden)

    Ragazzi Moira

    2015-01-01

    Full Text Available Epithelioid hemangioma (EH is an uncommon benign vascular lesion, also known as angioblastic lymphoid (or angiolymphoid hyperplasia with eosinophilia, characterized by an unclear etiopathogenesis.

  5. Draft genome sequence of the coccolithovirus Emiliania huxleyi virus 202.

    Science.gov (United States)

    Nissimov, Jozef I; Worthy, Charlotte A; Rooks, Paul; Napier, Johnathan A; Kimmance, Susan A; Henn, Matthew R; Ogata, Hiroyuki; Allen, Michael J

    2012-02-01

    Emiliania huxleyi virus 202 (EhV-202) is a member of the Coccolithoviridae, a group of viruses that infect the marine coccolithophorid Emiliania huxleyi. EhV-202 has a 160- to 180-nm-diameter icosahedral structure and a genome of approximately 407 kbp, consisting of 485 coding sequences (CDSs). Here we describe the genomic features of EhV-202, together with a draft genome sequence and its annotation, highlighting the homology and heterogeneity of this genome in comparison with the EhV-86 reference genome.

  6. Torque Generation of Enterococcus hirae V-ATPase*

    Science.gov (United States)

    Ueno, Hiroshi; Minagawa, Yoshihiro; Hara, Mayu; Rahman, Suhaila; Yamato, Ichiro; Muneyuki, Eiro; Noji, Hiroyuki; Murata, Takeshi; Iino, Ryota

    2014-01-01

    V-ATPase (VoV1) converts the chemical free energy of ATP into an ion-motive force across the cell membrane via mechanical rotation. This energy conversion requires proper interactions between the rotor and stator in VoV1 for tight coupling among chemical reaction, torque generation, and ion transport. We developed an Escherichia coli expression system for Enterococcus hirae VoV1 (EhVoV1) and established a single-molecule rotation assay to measure the torque generated. Recombinant and native EhVoV1 exhibited almost identical dependence of ATP hydrolysis activity on sodium ion and ATP concentrations, indicating their functional equivalence. In a single-molecule rotation assay with a low load probe at high ATP concentration, EhVoV1 only showed the “clear” state without apparent backward steps, whereas EhV1 showed two states, “clear” and “unclear.” Furthermore, EhVoV1 showed slower rotation than EhV1 without the three distinct pauses separated by 120° that were observed in EhV1. When using a large probe, EhVoV1 showed faster rotation than EhV1, and the torque of EhVoV1 estimated from the continuous rotation was nearly double that of EhV1. On the other hand, stepping torque of EhV1 in the clear state was comparable with that of EhVoV1. These results indicate that rotor-stator interactions of the Vo moiety and/or sodium ion transport limit the rotation driven by the V1 moiety, and the rotor-stator interactions in EhVoV1 are stabilized by two peripheral stalks to generate a larger torque than that of isolated EhV1. However, the torque value was substantially lower than that of other rotary ATPases, implying the low energy conversion efficiency of EhVoV1. PMID:25258315

  7. Role of transvaginal ultrasonography in diagnosing endometrial hyperplasia in pre- and post-menopause women

    OpenAIRE

    Shokouhi, Behrooz

    2015-01-01

    Background: Abnormal uterine bleeding (AUB) is the most common presenting symptom of endometrial hyperplasia (EH). Transvaginal ultrasonography (TVS) is a diagnostic tool in the evaluation of AUB and EH with various sensitivity and specificity. However, the exact accuracy of TVS in diagnosing EH had not been evaluated. In this study, we aim to evaluate the accuracy of TVS in detecting EH. Materials and Methods: In this retrospective study, 120 women (mean age of 48.64 ± 6.74 years) with AUB w...

  8. Optical and electron paramagnetic resonance studies of the excited triplet states of UV-B absorbers: 2-ethylhexyl salicylate and homomenthyl salicylate.

    Science.gov (United States)

    Sugiyama, Kazuto; Tsuchiya, Takumi; Kikuchi, Azusa; Yagi, Mikio

    2015-09-26

    The energy levels and lifetimes of the lowest excited triplet (T1) states of UV-B absorbers, 2-ethylhexyl salicylate (EHS) and homomenthyl salicylate (HMS), and their deprotonated anions (EHS(-) and HMS(-)) were determined through measurements of phosphorescence and electron paramagnetic resonance (EPR) spectra in rigid solutions at 77 K. The observed T1 energies of EHS and HMS are higher than those of butylmethoxydibenzoylmethane, the most widely used UV-A absorber, and octyl methoxycinnamate, the most widely used UV-B absorber. The T1 states of EHS, HMS, EHS(-) and HMS(-) were assigned to almost pure (3)ππ* state from the observed T1 lifetimes and zero-field splitting parameters. EHS and HMS with an intramolecular hydrogen bond show a photoinduced phosphorescence enhancement in ethanol at 77 K. The EPR signals of the T1 states of EHS and HMS also increase in intensity with UV-irradiation time (photoinduced EPR enhancement). The T1 lifetimes of EHS and HMS at room temperature were determined through triplet-triplet absorption measurements in ethanol. The quantum yields of singlet oxygen production by EHS and HMS were determined by using time-resolved near-IR phosphorescence.

  9. The use of environmental, health and safety research in nanotechnology research.

    Science.gov (United States)

    Youtie, Jan; Porter, Alan; Shapira, Philip; Tang, Li; Benn, Troy

    2011-01-01

    Environmental, health, and safety (EHS) concerns are receiving considerable attention in nanoscience and nanotechnology (nano) research and development (R&D). Policymakers and others have urged that research on nano's EHS implications be developed alongside scientific research in the nano domain rather than subsequent to applications. This concurrent perspective suggests the importance of early understanding and measurement of the diffusion of nano EHS research. The paper examines the diffusion of nano EHS publications, defined through a set of search terms, into the broader nano domain using a global nanotechnology R&D database developed at Georgia Tech. The results indicate that nano EHS research is growing rapidly although it is orders of magnitude smaller than the broader nano S&T domain. Nano EHS work is moderately multidisciplinary, but gaps in biomedical nano EHS's connections with environmental nano EHS are apparent. The paper discusses the implications of these results for the continued monitoring and development of the cross-disciplinary utilization of nano EHS research.

  10. NMR spectroscopy of organic compounds of selenium and tellurium. Communication 9. Chemical shifts of /sup 13/C in isological series of unsaturated ethers, sulfides, selenides and tellurides

    Energy Technology Data Exchange (ETDEWEB)

    Kalabin, G.A.; Bzhezovskii, V.M.; Kushnarev, D.F.; Proidakov, A.G. (Irkutskii Gosudarstvennyj Univ. (USSR))

    1981-06-01

    The effects of heteroatoms Eh(Eh=O, S, Se, Te) on /sup 13/C chemical shifts in eleven isological series of R/sup 1/-Eh-R/sup 2/ unsaturated compounds are compared. A linear relation between /sup 13/C nuclei screening and tEh electronegativity is observed. An assumption is suggested that both likeness of the effects of 6A and 7A group elements on /sup 13/C chemical shifts of R/sup 1/ and R/sup 2/ substituents and their difference for elements of the 4A group are caused by unbonded interactions of the substituents with unshared electron pairs of heteroatoms.

  11. Output characteristics of a series three-port axial piston pump

    Science.gov (United States)

    Zhang, Xiaogang; Quan, Long; Yang, Yang; Wang, Chengbin; Yao, Liwei

    2012-05-01

    Driving a hydraulic cylinder directly by a closed-loop hydraulic pump is currently a key research area in the field of electro-hydraulic control technology, and it is the most direct means to improve the energy efficiency of an electro-hydraulic control system. So far, this technology has been well applied to the pump-controlled symmetric hydraulic cylinder. However, for the differential cylinder that is widely used in hydraulic technology, satisfactory results have not yet been achieved, due to the asymmetric flow constraint. Therefore, based on the principle of the asymmetric valve controlled asymmetric cylinder in valve controlled cylinder technology, an innovative idea for an asymmetric pump controlled asymmetric cylinder is put forward to address this problem. The scheme proposes to transform the oil suction window of the existing axial piston pump into two series windows. When in use, one window is connected to the rod chamber of the hydraulic cylinder and the other is linked with a low-pressure oil tank. This allows the differential cylinders to be directly controlled by changing the displacement or rotation speed of the pumps. Compared with the loop principle of offsetting the area difference of the differential cylinder through hydraulic valve using existing technology, this method may simplify the circuits and increase the energy efficiency of the system. With the software SimulationX, a hydraulic pump simulation model is set up, which examines the movement characteristics of an individual piston and the compressibility of oil, as well as the flow distribution area as it changes with the rotation angle. The pump structure parameters, especially the size of the unloading groove of the valve plate, are determined through digital simulation. All of the components of the series arranged three distribution-window axial piston pump are designed, based on the simulation analysis of the flow pulse characteristics of the pump, and then the prototype pump is made

  12. Exertional heat illness incidence and on-site medical team preparedness in warm weather.

    Science.gov (United States)

    Hosokawa, Yuri; Adams, William M; Belval, Luke N; Davis, Robert J; Huggins, Robert A; Jardine, John F; Katch, Rachel K; Stearns, Rebecca L; Casa, Douglas J

    2018-03-29

    To investigate the influence of estimated wet bulb globe temperature (WBGT) and the International Institute of Race Medicine (IIRM) activity modification guidelines on the incidence of exertional heat stroke (EHS) and heat exhaustion (HEx) and the ability of an on-site medical team to treat those afflicted. Medical records of EHS and HEx patients over a 17-year period from the New Balance Falmouth Road Race were examined. Climatologic data from nearby weather stations were obtained to calculate WBGT with the Australian Bureau of Meteorology (WBGT A ) and Liljegren (WBGT L ) models. Incidence rate (IR) of EHS, HEx, and combined total of EHS and HEx (COM) were calculated, and linear regression analyses were performed to assess the relationship between IR and WBGT A or WBGT L . One-way ANOVA was performed to compare differences in EHS, HEx, and COM incidence to four alert levels in the IIRM guidelines. Incidence of EHS, HEx, and COM was 2.12, 0.98, and 3.10 cases per 1000 finishers. WBGT A explained 48, 4, and 46% of the variance in EHS, HEx, and COM IR; WBGT L explained 63, 13, and 69% of the variance in EHS, HEx, and COM IR. Main effect of WBGT A and WBGT L on the alert levels were observed in EHS and COM IR (p < 0.05). The cumulative number of EHS patients treated did not exceed the number of cold water immersion tubs available to treat them. EHS IR increased as WBGT and IIRM alert level increased, indicating the need for appropriate risk mitigation strategies and on-site medical treatment.

  13. Exertional heat illness incidence and on-site medical team preparedness in warm weather

    Science.gov (United States)

    Hosokawa, Yuri; Adams, William M.; Belval, Luke N.; Davis, Robert J.; Huggins, Robert A.; Jardine, John F.; Katch, Rachel K.; Stearns, Rebecca L.; Casa, Douglas J.

    2018-03-01

    To investigate the influence of estimated wet bulb globe temperature (WBGT) and the International Institute of Race Medicine (IIRM) activity modification guidelines on the incidence of exertional heat stroke (EHS) and heat exhaustion (HEx) and the ability of an on-site medical team to treat those afflicted. Medical records of EHS and HEx patients over a 17-year period from the New Balance Falmouth Road Race were examined. Climatologic data from nearby weather stations were obtained to calculate WBGT with the Australian Bureau of Meteorology (WBGTA) and Liljegren (WBGTL) models. Incidence rate (IR) of EHS, HEx, and combined total of EHS and HEx (COM) were calculated, and linear regression analyses were performed to assess the relationship between IR and WBGTA or WBGTL. One-way ANOVA was performed to compare differences in EHS, HEx, and COM incidence to four alert levels in the IIRM guidelines. Incidence of EHS, HEx, and COM was 2.12, 0.98, and 3.10 cases per 1000 finishers. WBGTA explained 48, 4, and 46% of the variance in EHS, HEx, and COM IR; WBGTL explained 63, 13, and 69% of the variance in EHS, HEx, and COM IR. Main effect of WBGTA and WBGTL on the alert levels were observed in EHS and COM IR (p < 0.05). The cumulative number of EHS patients treated did not exceed the number of cold water immersion tubs available to treat them. EHS IR increased as WBGT and IIRM alert level increased, indicating the need for appropriate risk mitigation strategies and on-site medical treatment.

  14. Enantioconvergent hydrolysis of racemic styrene oxide at high concentration by a pair of novel epoxide hydrolases into (R)-phenyl-1,2-ethanediol.

    Science.gov (United States)

    Wang, Rui; Hu, Die; Zong, Xuncheng; Li, Jinping; Ding, Lei; Wu, Minchen; Li, Jianfang

    2017-12-01

    To prepare (R)-phenyl-1,2-ethanediol ((R)-PED) with high enantiomeric excess (ee p ) and yield from racemic styrene oxide (rac-SO) at high concentration by bi-enzymatic catalysis. The bi-enzymatic catalysis was designed for enantioconvergent hydrolysis of rac-SO by a pair of novel epoxide hydrolases (EHs), a Vigna radiata EH3 (VrEH3) and a variant (AuEH2 A250I ) of Aspergillus usamii EH2. The simultaneous addition mode of VrEH3 and AuEH2 A250I , exhibiting the highest average turnover frequency (aTOF) of 0.12 g h -1 g -1 , was selected, by which rac-SO (10 mM) was converted into (R)-PED with 92.6% ee p and 96.3% yield. Under the optimized reaction conditions: dry weight ratio 14:1 of VrEH3-expressing E. coli/vreh3 to AuEH2 A250I -expressing E. coli/Aueh2 A250I and reaction at 20 °C, rac-SO (10 mM) was completely hydrolyzed in 2.3 h, affording (R)-PED with 98% ee p . At the weight ratio 0.8:1 of rac-SO to two mixed dry cells, (R)-PED with 97.4% ee p and 98.7% yield was produced from 200 mM (24 mg/ml) rac-SO in 10.5 h. Enantioconvergent hydrolysis of rac-SO at high concentration catalyzed by both VrEH3 and AuEH2 A250I is an effective method for preparing (R)-PED with high ee p and yield.

  15. Dispersion relation for elastic electron-hydrogen atom forward scattering amplitude

    International Nuclear Information System (INIS)

    Kuchiev, M.Yu.; Amusia, M.Ya.

    1978-01-01

    The elastic e+H forward scattering amplitude is an analytical function in the complex energy E plane and has two cuts on the real axis: 0 < E < infinity and -infinity < E < -B, B being the hydrogen ionization potential. The e+H dispersion relation contains two integrals over the right and left cuts. (Auth.)

  16. Propiedades físicas de estrellas con exoplanetas y anillos circunestelares /

    OpenAIRE

    Saffe Jameson, Carlos Emilio

    2008-01-01

    Tesis (Doctor en Astronomía)--Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física, 2008. Estudiamos diferentes aspectos de estrellas con exoplanetas (EH) y de estrellas de tipo Vega. Detectamos excesos IR en 20% de las estrellas EH, el cual se atribuye a la presencia de polvo circunestelar. Carlos Saffe.

  17. Epoxide hydrolase affects estrogen production in the human ovary.

    Science.gov (United States)

    Hattori, N; Fujiwara, H; Maeda, M; Fujii, S; Ueda, M

    2000-09-01

    To investigate the mechanisms of ovarian cell differentiation, we raised a new monoclonal antibody, HCL-3, which reacted with human luteal cells. It also reacted with human and porcine hepatocytes. The immunoaffinity-purified HCL-3 antigen from human corpora lutea (CL) was shown to be a 46-kDa protein. The N-terminal 22 amino acids of the 46-kDa protein from porcine liver exhibited high homology (82%) to human microsomal epoxide hydrolase (mEH). The purified HCL-3 antigen from human CL or porcine liver showed EH enzyme activity, confirming that HCL-3 antigen is identical to mEH, which is reported to detoxify the toxic substrates in the liver. In human follicles, mEH was immunohistochemically detected on granulosa and theca interna cells. In the menstrual and pregnant CL, mEH was also expressed on large and small luteal cells. A competitive inhibitor of EH, 1,2-epoxy-3,3,3-trichloropropane, inhibited the conversion of estradiol from testosterone by granulosa cells cultured in vitro, indicating the involvement of mEH in ovarian estrogen production. Because anticonvulsant sodium valproate and its analogues were reported to inhibit EH enzyme activity, these findings provide a new insight into the etiology of endocrine disorders that are frequently observed among epileptic patients taking anticonvulsant drugs.

  18. Cloning of an epoxide hydrolase encoding gene from Rhodotorula mucilaginosa and functional expresion in Yarrowia lipolytica

    CSIR Research Space (South Africa)

    Labuschagne, M

    2007-01-01

    Full Text Available , were used to amplify the genomic EH-encoding gene from Rhodotorula mucilaginosa. The 2347 bp genomic sequence revealed a 1979 bp ORF containing nine introns. The cDNA sequence revealed an 1185 bp EH-encoding gene that translates into a 394 amino acid...

  19. Electromagnetic hypersensitivity: Fact or fiction?

    International Nuclear Information System (INIS)

    Genuis, Stephen J.; Lipp, Christopher T.

    2012-01-01

    As the prevalence of wireless telecommunication escalates throughout the world, health professionals are faced with the challenge of patients who report symptoms they claim are connected with exposure to some frequencies of electromagnetic radiation (EMR). Some scientists and clinicians acknowledge the phenomenon of hypersensitivity to EMR resulting from common exposures such as wireless systems and electrical devices in the home or workplace; others suggest that electromagnetic hypersensitivity (EHS) is psychosomatic or fictitious. Various organizations including the World Health Organization as well as some nation states are carefully exploring this clinical phenomenon in order to better explain the rising prevalence of non-specific, multi-system, often debilitating symptoms associated with non-ionizing EMR exposure. As well as an assortment of physiological complaints, patients diagnosed with EHS also report profound social and personal challenges, impairing their ability to function normally in society. This paper offers a review of the sparse literature on this perplexing condition and a discussion of the controversy surrounding the legitimacy of the EHS diagnosis. Recommendations are provided to assist health professionals in caring for individuals complaining of EHS. - Highlights: ► Many people report symptoms when near devices emanating electromagnetic fields(EMF). ► Electromagnetic hypersensitivity (EHS) research has generated conflicting outcomes. ► Recent evidence suggests pathophysiological change in some individuals with EHS. ► EHS patients consistently report profound social and personal challenges. ► Clinicians need to be apprised of the EHS condition and potential interventions.

  20. Study supporting the phasing out of environmentally harmful subsidies

    Energy Technology Data Exchange (ETDEWEB)

    Withana, S.; Ten Brink, P.; Franckx, L.; Hirschnitz-Garbers, M.; Mayeres, I.; Oosterhuis, F.; Porsch, L.

    2012-10-15

    The need to reform ineffective or harmful public subsidies has long been recognised and has been a contentious point of discussion for several years. The EU has a long-standing commitment to removing or phasing out environmentally harmful subsidies (EHS). Most recently, the need to phase out EHS is reiterated in the 'Roadmap for a resource efficient Europe' which includes a milestone that 'by 2020 EHS will be phased out, with due regard to the impact on people in need'. Despite several commitments, progress has been slow and subsidies remain an issue in most EU countries. This study focuses specifically on EHS at the level of EU Member States; it identifies key types of EHS and examines cases of existing EHS across a range of environmental sectors and issues, including subsidies from non-action. The study also analyses examples of good practices in the reform of EHS in EU Member States and the lessons that can be learnt from these cases. Finally, based on this analysis, it develops practical recommendations on phasing out and reforming EHS to support the objectives of the Europe 2020 Strategy and the resource efficiency agenda. The study was carried out between January and October 2012 and is based on an analysis of literature and consultation with experts and policy makers. The sectoral cases studied are listed and discussed in the annexes report: agriculture, climate and energy, fisheries, food, forestry, materials, transport, waste, and water.

  1. Study supporting the phasing out of environmentally harmful subsidies. Annexes to Final Report

    Energy Technology Data Exchange (ETDEWEB)

    Withana, S.; Ten Brink, P.; Franckx, L.; Hirschnitz-Garbers, M.; Mayeres, I.; Oosterhuis, F.; Porsch, L.

    2012-10-15

    The need to reform ineffective or harmful public subsidies has long been recognised and has been a contentious point of discussion for several years. The EU has a long-standing commitment to removing or phasing out environmentally harmful subsidies (EHS). Most recently, the need to phase out EHS is reiterated in the 'Roadmap for a resource efficient Europe' which includes a milestone that 'by 2020 EHS will be phased out, with due regard to the impact on people in need'. Despite several commitments, progress has been slow and subsidies remain an issue in most EU countries. This study focuses specifically on EHS at the level of EU Member States; it identifies key types of EHS and examines cases of existing EHS across a range of environmental sectors and issues, including subsidies from non-action. The study also analyses examples of good practices in the reform of EHS in EU Member States and the lessons that can be learnt from these cases. Finally, based on this analysis, it develops practical recommendations on phasing out and reforming EHS to support the objectives of the Europe 2020 Strategy and the resource efficiency agenda. The study was carried out between January and October 2012 and is based on an analysis of literature and consultation with experts and policy makers. The sectoral cases studied are listed and discussed in this annex report: agriculture, climate and energy, fisheries, food, forestry, materials, transport, waste, and water.

  2. Early Head Start Participants, Programs, Families, and Staff in 2014

    Science.gov (United States)

    Mohan, Anitha; Walker, Christina

    2016-01-01

    In 1994, the federal Early Head Start (EHS) program was created to address the comprehensive needs of low-income pregnant women and children under age 3. EHS was launched almost 30 years after Head Start was established in 1965 to serve low-income 3- and 4-year-old children and their families with comprehensive early education and support…

  3. Experimental investigation on the active range of sulfate-reducing bacteria for geological disposal

    International Nuclear Information System (INIS)

    Fukunaga, S.; Fujiki, K.; Asano, H.; Yoshikawa, H.

    1995-01-01

    The active range of Desulfovibrio desulfuricans, a species of sulfate-reducing bacteria, was examined in terms of pH and Eh using a fermenter at controlled pH and Eh. Such research is important because sulfate-reducing bacteria (SRB) are thought to exist underground at depths equal to those of supposed repositories for high-level radioactive wastes and to be capable of inducing corrosion of the metals used in containment vessels. SRB activity was estimated at 35 C, with lactate as an electron donor, at a pH range from 7 to 11 and Eh range from 0 to -380 mV. Activity increased as pH approached neutral and Eh declined. The upper pH limit for activity was between 9.9 and 10.3, at Eh of -360 to -384 mV. The upper Eh limit for activity was between -68 and -3 mV, at pH 7.1. These results show that SRB can be made active at higher pH by decreasing Eh, and that the higher pH levels of 8 to 10 produced by use of the buffer material bentonite does not suppress SRB completely. A chart was obtained showing the active range of Desulfovibrio desulfuricans in terms of pH and Eh. Such charts can be used to estimate the viability of SRB and other microorganisms when the environmental conditions of a repository are specified

  4. An Efficient, “Burn in” Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor

    KAUST Repository

    Cha, Hyojung; Wu, Jiaying; Wadsworth, Andrew; Nagitta, Jade; Limbu, Saurav; Pont, Sebastian; Li, Zhe; Searle, Justin; Wyatt, Mark F.; Baran, Derya; Kim, Ji-Seon; McCulloch, Iain; Durrant, James R.

    2017-01-01

    polymer blended with either the nonfullerene acceptor EH-IDTBR or the fullerene derivative, [6,6]-phenyl C71 butyric acid methyl ester (PC71 BM) as electron acceptors is reported. Inverted PffBT4T-2OD:EH-IDTBR blend solar cell fabricated without any

  5. 7 CFR 2.79 - Administrator, Agricultural Marketing Service.

    Science.gov (United States)

    2010-01-01

    ... Foods Research and Nutrition Education Act (7 U.S.C. 3401-3417), except as delegated in § 2.43(a)(24... into the environment; (ii) Sections 104(e)-(h) of the Act (42 U.S.C. 9604(e)-(h)), with respect to... wage and labor standards applicable to covered work; and emergency procurement powers; (iii) Section...

  6. Intracranial extramedullary hematopoiesis in patients with thalassemia: a case report and review of the literature.

    Science.gov (United States)

    Eskazan, Ahmet Emre; Ar, Muhlis Cem; Baslar, Zafer

    2012-08-01

    Extramedullary hematopoiesis (EH) is a compensatory phenomenon that results in the production of blood cell precursors outside the marrow in patients with chronic hemolytic anemia and ineffective erythropoiesis. EH usually involves the liver, spleen, and lymph nodes. It can also be found at paravertebral, intrathoracic, or pelvic locations. Intracranial EH is a rare entity and often asymptomatic but can sometimes lead to symptomatic tumor-like masses. Treatment options are controversial and include hypertransfusion, surgical excision, radiotherapy, and hydroxyurea (HU). Successful treatment of an intracranial EH mass with HU and blood transfusions in a beta-thalassemia major patient was discussed along with a review of the published literature on intracranial EH in thalassemia. In our patient, the extramedullary hematopoietic mass in the interhemispheric fissure showed a marked improvement after 6 months of HU and hypertransfusion therapy. In the English literature, there are a few cases with intracranial EH and thalassemia, which were treated with different treatment modalities, with different outcomes. There is no standard treatment approach in patients with symptomatic EH. HU with hypertransfusion regimen is a reasonable first-choice modality in treating intracranial EH masses. © 2012 American Association of Blood Banks.

  7. An Enhanced Piezoelectric Vibration Energy Harvesting System with Macro Fiber Composite

    Directory of Open Access Journals (Sweden)

    Shuwen Zhang

    2015-01-01

    Full Text Available Self-power supply is a promising project in various applied conditions. Among this research area, piezoelectric material-based energy harvesting (EH method has been researched in recent years due to its advantages. With the limitation of energy form acceptance range of EH circuit system, a sum of energy is not accessible to be obtained. To enlarge the EH quantity from the vibration, an enhanced piezoelectric vibration EH structure with piezoelectric film is developed in this work. Piezoelectric-based energy harvesting mechanism is primarily proposed in this work. The special-designed electric circuit for EH from macro fiber composite (MFC is proposed and then analyzed. When the structure vibrates in its modes of frequencies, the experiments are developed to measure the EH effect. The energy harvested from the vibrating structure is analyzed and the enhanced effect is presented. The results indicate that, with the enhanced EH structure in this work, vibration energy from structure is obtained in a larger range, and the general EH quantity is enlarged.

  8. The Risk Assessment at the Workplace of Assembly Operation

    Directory of Open Access Journals (Sweden)

    Marek Burda

    2014-01-01

    Full Text Available Risk Assessment Process by FMEA method involve hazard identification, risk assessment and risk control processes and their input is fundamental to a successful EH&S system. This Risk assessment tool follows the general process and requirements of the Health and Safety Risk Assessment Procedure.

  9. Recurrent peripheral vestibulopathy: Is MRI useful for the diagnosis of endolymphatic hydrops in clinical practice?

    Energy Technology Data Exchange (ETDEWEB)

    Attye, Arnaud [University Hospital of Grenoble, IFR1, Department of Neuroradiology and MRI, Grenoble (France); Inserm, U836, Grenoble (France); Universite Joseph Fourier, Grenoble Institute of Neurosciences UMR-S836, Grenoble (France); University Hospital of Grenoble, Department of Otolaryngology, Grenoble (France); CHU Grenoble, MR Unit, BP 217 38043, Grenoble Cedex (France); Dumas, G. [University Hospital of Grenoble, Department of Otolaryngology, Grenoble (France); Tropres, I.; Pietras, J. [Inserm, U836, Grenoble (France); Universite Joseph Fourier, Grenoble Institute of Neurosciences UMR-S836, Grenoble (France); Roustit, M. [University Hospital of Grenoble, Department of Statistics, Grenoble (France); Karkas, A.; Schmerber, S. [Universite Joseph Fourier, Grenoble Institute of Neurosciences UMR-S836, Grenoble (France); University Hospital of Grenoble, Department of Otolaryngology, Grenoble (France); Banciu, E. [University Hospital of Grenoble, IFR1, Department of Neuroradiology and MRI, Grenoble (France); Lamalle, L. [Universite Joseph Fourier, Grenoble Institute of Neurosciences UMR-S836, Grenoble (France); CNRS, UMS 3552, Grenoble (France); Krainik, A. [University Hospital of Grenoble, IFR1, Department of Neuroradiology and MRI, Grenoble (France); Inserm, U836, Grenoble (France); Universite Joseph Fourier, Grenoble Institute of Neurosciences UMR-S836, Grenoble (France)

    2015-10-15

    Recurrent peripheral vestibulopathy (RPV) is a public health problem, yet the aetiology remains unclear. Recent developments in MRI of endolymphatic hydrops (EH) allow for a better understanding of inner ear disorders. We intended to study the prevalence of EH in patients with RPV, in comparison to those with Meniere's disease (MD). MRI examinations were performed 4 hours after intravenous injection of gadoteric acid in 132 patients with RPV (n = 64) and MD (n = 68). Two radiologists retrospectively studied the prevalence and localization of EH in RPV and MD groups. Patients were graded based on the number and localization of hydrops, between 1 (EH in either cochlea or vestibule on one side) and 4 (EH in cochlea and vestibule on both ears). We identified EH in 31 out of 64 patients and in 61 out of 68 patients in the RPV and MD groups, respectively. There was a significant difference regarding the number of subjects with EH between the two groups (p ≤ 0.01), with a higher average number of hydrops localization in MD group (p ≤ 0.01). MRI may reveal EH in some cases among patients with RPV, suggesting a similar pathophysiological mechanism in comparison with MD. (orig.)

  10. How to Stop Biting Your Nails

    Medline Plus

    Full Text Available ... a = "", b = [ "adid=aad-aad-1", "site=ehs.con.aad.aad", "size=160x600", "vpos=t", "hpos=l", " ... a = "", b = [ "adid=aad-aad-0", "site=ehs.con.aad.aad", "size=728x90", "vpos=t", "hpos=l", " ...

  11. Bug bites and stings: When to see a dermatologist

    Medline Plus

    Full Text Available ... a = "", b = [ "adid=aad-aad-1", "site=ehs.con.aad.aad", "size=160x600", "vpos=t", "hpos=l", " ... a = "", b = [ "adid=aad-aad-0", "site=ehs.con.aad.aad", "size=728x90", "vpos=t", "hpos=l", " ...

  12. Early Head Start: Factors Associated with Caregiver Knowledge of Child Development, Parenting Behavior, and Parenting Stress

    Science.gov (United States)

    Belcher, Harolyn M. E.; Watkins, Katara; Johnson, Elizabeth; Ialongo, Nicholas

    2007-01-01

    This study investigates the role of socioeconomic status, parental mental health, and knowledge of child development on parenting styles and perceived parenting stress in caregivers of children, ages 3 months to 3 years, enrolled in Early Head Start (EHS). Caregivers of EHS students were interviewed using the Knowledge of Infant Development…

  13. Cloning, multicopy expression and fed-batch production of Rhodotorula araucariae epoxide hydrolase in yarrowia lipolytica

    CSIR Research Space (South Africa)

    Ramduth, D

    2008-05-01

    Full Text Available demonstrated a 4 fold enhanced EH activity over the transformant. The transformant was then evaluated in batch and fed batch fermentations, where the batch fermentations resulted in - 50% improved EH activity from flask evaluations. In fed batch fermentations...

  14. DIF Testing with an Empirical-Histogram Approximation of the Latent Density for Each Group

    Science.gov (United States)

    Woods, Carol M.

    2011-01-01

    This research introduces, illustrates, and tests a variation of IRT-LR-DIF, called EH-DIF-2, in which the latent density for each group is estimated simultaneously with the item parameters as an empirical histogram (EH). IRT-LR-DIF is used to evaluate the degree to which items have different measurement properties for one group of people versus…

  15. Understanding and managing health and environmental risks of CIS, CGS, and CdTe photovoltaic module production and use: A workshop

    Energy Technology Data Exchange (ETDEWEB)

    Moskowitz, P.D.; Zweibel, K.; DePhillips, M.P. [eds.

    1994-04-28

    Environmental, health and safety (EH&S) risks presented by CIS, CGS and CdTe photovoltaic module production, use and decommissioning have been reviewed and discussed by several authors. Several EH&S concerns exit. The estimated EH&S risks are based on extrapolations of toxicity, environmental mobility, and bioavailability data for other related inorganic compounds. Sparse data, however, are available for CIS, CGS or CdTe. In response to the increased interest in these materials, Brookhaven National Laboratory (BNL) has been engaged in a cooperative research program with the National Renewable Energy Laboratory (NREL), the Fraunhofer Institute for Solid State Technology (IFT), the Institute of Ecotoxicity of the GSF Forschungszentrum fair Umwelt und Gesundheit, and the National Institute of Environmental Health Sciences (NIEHS) to develop fundamental toxicological and environmental data for these three compounds. This workshop report describes the results of these studies and describes their potential implications with respect to the EH&S risks presented by CIS, CGS, and CdTe module production, use and decommissioning.

  16. Entamoeba histolytica acetyl–CoA synthetase: biomarker of acute amoebic liver abscess

    Directory of Open Access Journals (Sweden)

    Lim Boon Huat

    2014-06-01

    Conclusions: This finding suggested the significant role of EhACS as a biomarker for moribund hamsters with acute amoebic liver abscess (ALA infection. It is deemed pertinent that future studies explore the potential roles of EhACS in better understanding the pathogenesis of ALA; and in the development of vaccine and diagnostic tests to control ALA in human populations.

  17. Recent occurrence of Perotis lugubris (Coleoptera: Buprestidae) in the Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Roleček, Jan; Čížek, Lukáš

    2017-01-01

    Roč. 53, č. 1 (2017), s. 337-339 ISSN 1210-6100 R&D Projects: GA TA ČR(CZ) TB020MZP048 Institutional support: RVO:67985939 ; RVO:60077344 Keywords : faunistics * jewel beetle * threatened species * old fruit trees Subject RIV: EH - Ecology, Behaviour; EH - Ecology, Behaviour (BC-A) OBOR OECD: Ecology; Zoology (BC-A)

  18. Recurrent peripheral vestibulopathy: Is MRI useful for the diagnosis of endolymphatic hydrops in clinical practice?

    International Nuclear Information System (INIS)

    Attye, Arnaud; Dumas, G.; Tropres, I.; Pietras, J.; Roustit, M.; Karkas, A.; Schmerber, S.; Banciu, E.; Lamalle, L.; Krainik, A.

    2015-01-01

    Recurrent peripheral vestibulopathy (RPV) is a public health problem, yet the aetiology remains unclear. Recent developments in MRI of endolymphatic hydrops (EH) allow for a better understanding of inner ear disorders. We intended to study the prevalence of EH in patients with RPV, in comparison to those with Meniere's disease (MD). MRI examinations were performed 4 hours after intravenous injection of gadoteric acid in 132 patients with RPV (n = 64) and MD (n = 68). Two radiologists retrospectively studied the prevalence and localization of EH in RPV and MD groups. Patients were graded based on the number and localization of hydrops, between 1 (EH in either cochlea or vestibule on one side) and 4 (EH in cochlea and vestibule on both ears). We identified EH in 31 out of 64 patients and in 61 out of 68 patients in the RPV and MD groups, respectively. There was a significant difference regarding the number of subjects with EH between the two groups (p ≤ 0.01), with a higher average number of hydrops localization in MD group (p ≤ 0.01). MRI may reveal EH in some cases among patients with RPV, suggesting a similar pathophysiological mechanism in comparison with MD. (orig.)

  19. Improvement of enantioselectivity by immobilized imprinting of epoxide hydrolase from Rhodotorula glutinis

    NARCIS (Netherlands)

    Kronenburg, N.A.E.; Bont, de J.A.M.; Fischer, L.

    2001-01-01

    The yeast Rhodotorula glutinis contains an enantioselective, membrane-associated epoxide hydrolase (EH). Partially purified EH was immobilized in a two-step procedure. In the first step, the proteins were derivatized with itaconic anhydride. In the second step, the derivatized proteins were

  20. Dicty_cDB: VHE487 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available CNMS7844.b1_H17.ab1 CNM(LMS) spotted knapweed Centaurea maculosacDNA clone CNMS7844, mRNA sequence. 38 0.016... 2 EH740364 |EH740364.1 CNMS13648.b1_O04.ab1 CNM(LMS) spotted knapweed Centaurea maculosa cDNA clone CNMS136

  1. Environmental gradients and micro-heterogeneity shape fine-scale plant community assembly on coastal dunes

    Czech Academy of Sciences Publication Activity Database

    Conti, L.; de Bello, Francesco; Lepš, Jan; Acosta, A. T. R.; Carboni, M.

    2017-01-01

    Roč. 28, č. 4 (2017), s. 762-773 ISSN 1100-9233 Institutional support: RVO:60077344 ; RVO:67985939 Keywords : Competition * Convergence * Divergence Subject RIV: EH - Ecology, Behaviour; EH - Ecology, Behaviour (BC-A) OBOR OECD: Ecology; Ecology (BC-A) Impact factor: 2.924, year: 2016

  2. Entamoeba histolytica Cysteine Proteinase 5 Evokes Mucin Exocytosis from Colonic Goblet Cells via αvβ3 Integrin.

    Directory of Open Access Journals (Sweden)

    Steve Cornick

    2016-04-01

    Full Text Available Critical to the pathogenesis of intestinal amebiasis, Entamoeba histolytica (Eh induces mucus hypersecretion and degrades the colonic mucus layer at the site of invasion. The parasite component(s responsible for hypersecretion are poorly defined, as are regulators of mucin secretion within the host. In this study, we have identified the key virulence factor in live Eh that elicits the fast release of mucin by goblets cells as cysteine protease 5 (EhCP5 whereas, modest mucus secretion occurred with secreted soluble EhCP5 and recombinant CP5. Coupling of EhCP5-αvβ3 integrin on goblet cells facilitated outside-in signaling by activating SRC family kinases (SFK and focal adhesion kinase that resulted in the activation/phosphorlyation of PI3K at the site of Eh contact and production of PIP3. PKCδ was activated at the EhCP5-αvβ3 integrin contact site that specifically regulated mucin secretion though the trafficking vesicle marker myristoylated alanine-rich C-kinase substrate (MARCKS. This study has identified that EhCP5 coupling with goblet cell αvβ3 receptors can initiate a signal cascade involving PI3K, PKCδ and MARCKS to drive mucin secretion from goblet cells critical in disease pathogenesis.

  3. Oral health of early head start children: a qualitative study of staff, parents, and pregnant women.

    Science.gov (United States)

    Mofidi, Mahyar; Zeldin, Leslie P; Rozier, R Gary

    2009-02-01

    We explored the oral health knowledge, attitudes, and activities of Early Head Start (EHS) staff members, parents, and pregnant women, along with their suggestions related to future oral health educational interventions targeting EHS children. Nine focus groups were conducted with EHS staff, parents, and pregnant women. Audiotapes of sessions were transcribed and entered into ATLAS.ti 5.0 for coding and analysis. Attitudes about the importance of children's oral health among parents and pregnant women were mixed. Staff members voiced responsibility for children's oral health but frustration in their inability to communicate effectively with parents. Parents in turn perceived staff criticism regarding how they cared for their children's oral health. Gaps were noted in the oral health activities of EHS programs. Participants expressed confusion regarding the application of Head Start oral health performance standards to EHS. The need for culturally sensitive, hands-on oral health education was highlighted. Tailored, theory-based interventions are needed to improve communication between EHS staff and families. Clear policies on the application of Head Start oral health performance standards to EHS are warranted. Educational activities should address the needs and suggestions of EHS participants.

  4. Relationship between ADD1 Gly460Trp gene polymorphism and essential hypertension in Madeira Island.

    Science.gov (United States)

    Sousa, Ana Célia; Palma Dos Reis, Roberto; Pereira, Andreia; Borges, Sofia; Freitas, Ana Isabel; Guerra, Graça; Góis, Teresa; Rodrigues, Mariana; Henriques, Eva; Freitas, Sónia; Ornelas, Ilídio; Pereira, Décio; Brehm, António; Mendonça, Maria Isabel

    2017-10-01

    Essential hypertension (EH) is a complex disease in which physiological, environmental, and genetic factors are involved in its genesis. The genetic variant of the alpha-adducin gene (ADD1) has been described as a risk factor for EH, but with controversial results.The objective of this study was to evaluate the association of ADD1 (Gly460Trp) gene polymorphism with the EH risk in a population from Madeira Island.A case-control study with 1614 individuals of Caucasian origin was performed, including 817 individuals with EH and 797 controls. Cases and controls were matched for sex and age, by frequency-matching method. All participants collected blood for biochemical and genotypic analysis for the Gly460Trp polymorphism. We further investigated which variables were independently associated to EH, and, consequently, analyzed their interactions.In our study, we found a significant association between the ADD1 gene polymorphism and EH (odds ratio 2.484, P = .01). This association remained statistically significant after the multivariate analysis (odds ratio 2.548, P = .02).The ADD1 Gly460Trp gene polymorphism is significantly and independently associated with EH risk in our population. The knowledge of genetic polymorphisms associated with EH is of paramount importance because it leads to a better understanding of the etiology and pathophysiology of this pathology.

  5. Variability of Performance: A "Signature" Characteristic of Learning Disabled Children?

    Science.gov (United States)

    Fuchs, Douglas; And Others

    Two studies were conducted to compare the performance instability of children (grades 3-9) labeled learning disabled/brain injured (LD/BI) to the performance instability of emotionally handicapped (EH) children. In the first study, 50 LD/BI and 37 EH students were measured on three third grade reading passages twice, once within one sitting and…

  6. Adaptive Media Access Control for Energy Harvesting - Wireless Sensor Networks

    DEFF Research Database (Denmark)

    Fafoutis, Xenofon; Dragoni, Nicola

    2012-01-01

    ODMAC (On-Demand Media Access Control) is a recently proposed MAC protocol designed to support individual duty cycles for Energy Harvesting — Wireless Sensor Networks (EH-WSNs). Individual duty cycles are vital for EH-WSNs, because they allow nodes to adapt their energy consumption to the ever-ch...

  7. Home Visiting Processes: Relations with Family Characteristics and Outcomes

    Science.gov (United States)

    Peterson, Carla A.; Roggman, Lori A.; Green, Beth; Chazan-Cohen, Rachel; Korfmacher, Jon; McKelvey, Lorraine; Zhang, Dong; Atwater, Jane B.

    2013-01-01

    Variations in dosage, content, and family engagement with Early Head Start (EHS) home visiting services were examined for families participating in the EHS Research and Evaluation Project. Families were grouped by characteristics of maternal age, maternal ethnicity, and level of family risk. All home visiting variables were related differentially…

  8. Nitrogen fixation and diurnal changes of photosynthetic activity in Arctic soil crusts at different development stage

    Czech Academy of Sciences Publication Activity Database

    Pushkareva, E.; Kvíderová, Jana; Šimek, Miloslav; Elster, Josef

    2017-01-01

    Roč. 79, 1 March 2017 (2017), s. 21-30 ISSN 1164-5563 Institutional support: RVO:60077344 ; RVO:67985939 Keywords : Soil crust * Arctic * Photosynthetic activity Subject RIV: EH - Ecology, Behaviour; EH - Ecology, Behaviour (BC-A) OBOR OECD: Ecology; Ecology (BC-A) Impact factor: 2.445, year: 2016

  9. Fundamental study of inorganic-organic hybrid scintillator using Pr:Lu.sub.3./sub.Al.sub.5./sub.O.sub.12./sub. and plastic scintillator

    Czech Academy of Sciences Publication Activity Database

    Kamada, K.; Kurosawa, S.; Yokota, Y.; Yanagida, T.; Nikl, Martin; Yoshikawa, A.

    2014-01-01

    Roč. 53, č. 4 (2014), "04EH10-1"-"04EH10-4" ISSN 0021-4922 Institutional support: RVO:68378271 Keywords : scintillators * Pr:LuAG * luminescence Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 1.127, year: 2014

  10. The effect of Early Head Start on child welfare system involvement: A first look at longitudinal child maltreatment outcomes☆

    Science.gov (United States)

    Green, Beth L.; Ayoub, Catherine; Bartlett, Jessica Dym; Von Ende, Adam; Furrer, Carrie; Chazan-Cohen, Rachel; Vallotton, Claire; Klevens, Joanne

    2015-01-01

    The high societal and personal costs of child maltreatment make identification of effective early prevention programs a high research priority. Early Head Start (EHS), a dual generational program serving low-income families with children prenatally through age three years, is one of the largest federally funded programs for infants and toddlers in the United States. A national randomized trial found EHS to be effective in improving parent and child outcomes, but its effectiveness in reducing child maltreatment was not assessed. The current study used administrative data from state child welfare agencies to examine the impact of EHS on documented abuse and neglect among children from seven of the original seventeen programs in the national EHS randomized controlled trial. Results indicated that children in EHS had significantly fewer child welfare encounters between the ages of five and nine years than did children in the control group, and that EHS slowed the rate of subsequent encounters. Additionally, compared to children in the control group, children in EHS were less likely to have a substantiated report of physical or sexual abuse, but more likely to have a substantiated report of neglect. These findings suggest that EHS may be effective in reducing child maltreatment among low-income children, in particular, physical and sexual abuse. PMID:26744550

  11. A snapshot of the physical and functional wiring of the Eps15 homology domain network in the nematode

    DEFF Research Database (Denmark)

    Tsushima, Hanako; Malabarba, Maria Grazia; Confalonieri, Stefano

    2013-01-01

    Protein interaction modules coordinate the connections within and the activity of intracellular signaling networks. The Eps15 Homology (EH) module, a protein-protein interaction domain that is a key feature of the EH-network, was originally identified in a few proteins involved in endocytosis and...

  12. Experiments on hot-electron ECRH in the Tandem Mirror Experiment-Upgrade

    International Nuclear Information System (INIS)

    Stallard, B.W.

    1983-01-01

    Experiments have begun on the Tandem Mirror Experiment Upgrade (TMX-U) using electron-cyclotron resonant heating (ECRH) to generate the hot electron populations required for thermal barrier operation (Energy E/sub eh/ approx. 50 keV, density n/sub eh/ 12 , and hot-to-cold fraction n/sub eh/n approx. 0.9). For this operation, rf power produced by 28-GHz gyrotrons is injected with extraordinary mode polarization at both fundamental and second harmonic locations. Our initial experiments, which concentrated on startup of the hot electrons, were carried out at low density ( 12 cm - 3 ) where Fokker-Planck calculations predict high heating efficiency when the electron temperature (T/sub e/) is low. Under these conditions, we produced substantial hot electron populations (diamagnetic energy > 400 J, E/sub eh/ in the range of 15 to 50 keV, and n/sub eh//n > 0.5)

  13. Review of the DOE Packaging and Transportation Safety Program

    International Nuclear Information System (INIS)

    Snyder, B.J.; Cece, J.M.

    1992-12-01

    This report documents the results of a year-long self-assessment of DOE-EH transportation and packaging safety activities. The self-assessment was initiated in September 1991 and concluded in August 1992. The self-assessment identified several significant issues, some of which have been resolved by EH. Also, improvements in the EH program were made during the course of the self-assessment. The report reflects the status of the EH transportation and packaging safety activities at the conclusion of the self-assessment. This report consists of several sections which discuss background, objectives and description of the review. Another section includes summary discussion and key conclusions. Appendix A, Issues, Observations and Recommendations, lists fifteen issues, including appropriate observations and recommendations. A Corrective Action Plan, which documents EH managements resolve to implement the agreed-upon recommendations, is included. The Corrective Action Plan reflects the status of completed and planned actions as of the date of the report

  14. Discovery of potent inhibitors of soluble epoxide hydrolase by combinatorial library design and structure-based virtual screening.

    Science.gov (United States)

    Xing, Li; McDonald, Joseph J; Kolodziej, Steve A; Kurumbail, Ravi G; Williams, Jennifer M; Warren, Chad J; O'Neal, Janet M; Skepner, Jill E; Roberds, Steven L

    2011-03-10

    Structure-based virtual screening was applied to design combinatorial libraries to discover novel and potent soluble epoxide hydrolase (sEH) inhibitors. X-ray crystal structures revealed unique interactions for a benzoxazole template in addition to the conserved hydrogen bonds with the catalytic machinery of sEH. By exploitation of the favorable binding elements, two iterations of library design based on amide coupling were employed, guided principally by the docking results of the enumerated virtual products. Biological screening of the libraries demonstrated as high as 90% hit rate, of which over two dozen compounds were single digit nanomolar sEH inhibitors by IC(50) determination. In total the library design and synthesis produced more than 300 submicromolar sEH inhibitors. In cellular systems consistent activities were demonstrated with biochemical measurements. The SAR understanding of the benzoxazole template provides valuable insights into discovery of novel sEH inhibitors as therapeutic agents.

  15. Modeling and analysis of a meso-hydraulic climbing robot with artificial muscle actuation.

    Science.gov (United States)

    Chapman, Edward M; Jenkins, Tyler E; Bryant, Matthew

    2017-07-10

    This paper presents a fully coupled electro-hydraulic model of a bio-inspired climbing robot actuated by fluidic artificial muscles (FAMs). This analysis expands upon previous FAM literature by considering not only the force and contraction characteristics of the actuator, but the complete hydraulic and electromechanical circuits as well as the dynamics of the climbing robot. This analysis allows modeling of the time-varying applied pressure, electrical current, and actuator contraction for accurate prediction of the robot motion, energy consumption, and mechanical work output. The developed model is first validated against mechanical and electrical data collected from a proof-of-concept prototype robot. The model is then employed to study the system-level sensitivities of the robot locomotion efficiency and average climbing speed to several design and operating parameters. The results of this analysis demonstrate that considering only the transduction efficiency of the FAM actuators is insufficient to maximize the efficiency of the complete robot, and that a holistic approach can lead to significant improvements in performance. © 2017 IOP Publishing Ltd.

  16. Nonlinear stability research on the hydraulic system of double-side rolling shear

    Science.gov (United States)

    Wang, Jun; Huang, Qingxue; An, Gaocheng; Qi, Qisong; Sun, Binyu

    2015-10-01

    This paper researches the stability of the nonlinear system taking the hydraulic system of double-side rolling shear as an example. The hydraulic system of double-side rolling shear uses unsymmetrical electro-hydraulic proportional servo valve to control the cylinder with single piston rod, which can make best use of the space and reduce reversing shock. It is a typical nonlinear structure. The nonlinear state-space equations of the unsymmetrical valve controlling cylinder system are built first, and the second Lyapunov method is used to evaluate its stability. Second, the software AMEsim is applied to simulate the nonlinear system, and the results indicate that the system is stable. At last, the experimental results show that the system unsymmetrical valve controlling the cylinder with single piston rod is stable and conforms to what is deduced by theoretical analysis and simulation. The construction and application of Lyapunov function not only provide the theoretical basis for using of unsymmetrical valve controlling cylinder with single piston rod but also develop a new thought for nonlinear stability evaluation.

  17. Procedure and layout for the development of a fatigue test on an agricultural implement by a four poster test bench

    Directory of Open Access Journals (Sweden)

    M. Cutini

    2013-09-01

    Full Text Available The increasing demand in agricultural vehicles’ power requirements, payloads and driving speeds increases issues related to tractors and farm implements exposure to solicitations. One of the main factors to be taken into account for fatigue test developing on agricultural machines is the heterogeneity of the environment and activity in which the tractor operates. In particular, for contractors the use in transport conditions both on terrain and road becomes important. As far as transport is concerned. factors mainly affecting solicitations on carried implement are soil profile roughness, tractor settings and forward speed. In this paper, CRA-ING laboratory of Treviglio, Italy, together with Frandent Group s.r.l. (Osasco, Italy, analyse the possibility of creating a solicitation profile by means of one four poster test bench for fatigue test on a carried implement simulating transport conditions. Accelerations at the hubs of the tractor were acquired during transport on terrain and reproduced with one electro-hydraulic four posters test bench on one dummy of a tractor developed for carrying the implement. Artificial bumps were mathematically created and introduced in the time history to simulate squares solicitations. Twelve hours of test were carried out. This experience confirmed the possibility of carrying out laboratory fatigue test on agricultural implements by reproducing specific field conditions solicitations with four poster test bench.

  18. Identificación de accionamiento de motor de inducción con bomba centrífuga usando lógica difusa

    Directory of Open Access Journals (Sweden)

    Luis Delfín Rojas Purón

    2011-02-01

    Full Text Available Con el objetivo de indicar zonas de trabajo con mejores rendimientos en los sistemas de accionamientoselectrohidráulicos, se realiza una identificación de los subsistemas del motor de inducción con bombacentrífuga encargada del transporte de hidromezclas de pulpas lateríticas, atendiendo a las variables quemás participan en la transferencia de energía, y con esto, supervisar y diagnosticar con anticipación sueficiencia. Se muestra un algoritmo con identificación difusa que correlaciona las funciones ofrecidasdesde la ecuación de los momentos del accionamiento eléctrico sobre la base de las pérdidas con el finde minimizar la potencia de entrada del sistema desde su contexto tecnológico y experimental.  With objetive to indicate sure areas of work with high yields in the system of electro-hydraulic workings,its is performance an identification of the subsystems of the induction motor with centrifugal pump thattransports pulp latheritic hydromixes, assisting to the variables that more participates in the energy transfer,and with this to supervise and to diagnose their efficiency in advance. A fuzzy algorithm is shown thatcorrelates the functions offered from losses based the moments equation of electric drives with thepurpose of minimizing the input power working from the experimental and technological context of thesystem.

  19. Fundamental examinations for the mechanisation of the support work in headings by blasting and by using selective cut heading machines

    Energy Technology Data Exchange (ETDEWEB)

    Stoecker, H.M.; Luerig, H.J.

    1982-01-01

    Starting from the results of a stock-taking of the support methods used up to now and from exact analyses of the situation in the heading field, a concept will be elaborated with the aim, in addition to the reduction of the well-known high physical strain by the setting of the support, of rationalization of this partial procedure in case of conventional heading. The principal item is a floor-connected transportation and erection-vehicle with electro-hydraulic drive and an adjustable erection deck, which permits a fully mechanised setting of the support inclusive the side sections. By a transversible novel drilling equipment hung up at the roof of a drift a parallelization of different procedures and therewith a rationalization effect can be reached at the same time. The concept of this realizability will be demonstrated at a volume - right and power - right heading model on a scale 1:5. The developed equipment consist of operationally approved single aggregates and for the test they can also be used separately. Therewith a gradual introduction of the system is possible. At the beginning a provisional safety equipment for the direct at the face area will be introduced for the selective cut heading machine driving. According to the actual stage of the first considerations the main disadvantage of the safety equipment is the insufficient stock safety and its outrigger at the support already set.

  20. INTEGRATED ROBOT-HUMAN CONTROL IN MINING OPERATIONS

    Energy Technology Data Exchange (ETDEWEB)

    George Danko

    2006-04-01

    This report describes the results of the 2nd year of a research project on the implementation of a novel human-robot control system for hydraulic machinery. Sensor and valve re-calibration experiments were conducted to improve open loop machine control. A Cartesian control example was tested both in simulation and on the machine; the results are discussed in detail. The machine tests included open-loop as well as closed-loop motion control. Both methods worked reasonably well, due to the high-quality electro-hydraulic valves used on the experimental machine. Experiments on 3-D analysis of the bucket trajectory using marker tracking software are also presented with the results obtained. Open-loop control is robustly stable and free of short-term dynamic problems, but it allows for drifting away from the desired motion kinematics of the machine. A novel, closed-loop control adjustment provides a remedy, while retaining much of the advantages of the open-loop control based on kinematics transformation. Additional analysis of previously recorded, three-dimensional working trajectories of the bucket of large mine shovels was completed. The motion patterns, when transformed into a family of curves, serve as the basis for software-controlled machine kinematics transformation in the new human-robot control system.

  1. Research on control system of truck-mounted rig for coalbed methane

    Directory of Open Access Journals (Sweden)

    Wang Hejian

    2018-01-01

    Full Text Available The coal-bed methane (CBM as a kind energy is clean and efficient, also it can become a security risk in mining process if it could not get out of the coal seam. In view of the current large-scale exploitation of coal-bed methane resources, the development of drilling rig for CBM drilling is needed. The parameters and structures were introduced in the paper. The rig uses a highly integrated approach that integrates the required functions on the chassis of the vehicle to meet the needs of rapid installation and transportation. Drilling control system uses hydraulic control and electro-hydraulic control dual control mode, can achieve short-range and remote control operations. The control system include security circuits and electric control system. Through the field trial, it is shown that the rig can meet the construction of the majority of coalbed methane drilling in the country and the performance is stable and the operation is simple.

  2. XX international {mu}-symposium - Brake conference. Papers; XX Internationales {mu}-Symposium - Bremsen-Fachtagung. Betraege

    Energy Technology Data Exchange (ETDEWEB)

    Breuer, B. [ed.] [Verein Deutscher Ingenieure (VDI), Darmstadt (Germany); Bauer, E. (comp.) [TMD Friction GmbH, Leverkusen (Germany)

    2000-07-01

    This year, more brake experts from the international automotive community than ever will take part in the XXth {mu}-Symposium upon the invitation of TMD Friction and learn about the latest developments in their professional fields, discuss with each other, and listen in the opening speech to the viewpoints of a behavioural scientist on braking as the main focus of {mu}-Symposium and {mu}-Club. The contents of this {mu}-Symposium will be the following: Braking from the behavioural scientist's viewpoint/research on tribological characteristics between Al-MMC brake disc and friction material/SBC - the electro-hydraulic brake system from Mercedes-Benz/total chassis management - heading for the intelligent chassis/TMD Friction - a company profile. (orig./AKF) [German] Bremsenexperten der internationalen Automobilwelt trafen sich im Herbst 2000 zum zwanzigsten Mal auf Einladung von TMD Friction in Bad Neuenahr. Dieser Bericht fasst - jeweils in deutsch und englisch - die Vortraege ueber neueste Entwicklungen aus Industrie und Hochschule zusammen. Im Einfuehrungsvortrag berichtet ein Verhaltenswissenschaftler ueber seine Gedanken zum Bremsen als dem Hauptgegenstand von {mu}-Symposium und {mu}-Club. Ferner gehoeren die Praesentation des elektrohydraulischen Bremssystems ebenso zum Programm des Symposiums wie die Vorstellung von Forschungsergebnissen neuer Reibpaarungen und der Blick auf die Zukunft des Fahrwerks im Verbund mit Fahrzeugregelsystemen. (orig./AKF)

  3. Fatigue Behavior of 2A12 Aluminum Alloy Under Multiaxial Loading

    Directory of Open Access Journals (Sweden)

    CHEN Ya-jun

    2017-08-01

    Full Text Available The multiaxial fatigue behavior of 2A12 aluminum alloy was studied with SDN100/1000 electro-hydraulic servo tension-torsion fatigue tester under multiple variables, and the failure mechanism was investigated by scanning electron microscopy (SEM. The results show that under the loading condition of equivalent stress, the fatigue life decreases with the increase of phase angle. For the phase angle 0°, some special features can be observed in the crack initial zone, such as the tire pattern,fishbone pattern and stalactite pattern. There are secondary cracks and vague fatigue striations in the crack propagation zone; the multiaxial fatigue life decreases with the change of mean stress for tension or torsion. Some white flocculent oxides can be found in the crack initiation zone, and secondary crack as well as shear-type elongated dimples in the instantaneous fracture zone; facing different loading waveforms, the multiaxial life of sine wave is the longest, triangle wave in the second place, and the square wave is the shortest, under the loading condition of equivalent stress, square wave leads to the maximum structural energy dissipation. Under the low and high two step loading, 2A12 shows training effect.

  4. Study on a linear relationship between limited pressure difference and coil current of on/off valve and its influential factors.

    Science.gov (United States)

    Zhang, Junzhi; Lv, Chen; Yue, Xiaowei; Li, Yutong; Yuan, Ye

    2014-01-01

    On/off solenoid valves with PWM control are widely used in all types of vehicle electro-hydraulic control systems respecting to their desirable properties of reliable, low cost and fast acting. However, it can hardly achieve a linear hydraulic modulation by using on/off valves mainly due to the nonlinear behaviors of valve dynamics and fluid, which affects the control accuracy significantly. In this paper, a linear relationship between limited pressure difference and coil current of an on/off valve in its critical closed state is proposed and illustrated, which has a great potential to be applied to improve hydraulic control performance. The hydraulic braking system of case study is modeled. The linear correspondence between limited pressure difference and coil current of the inlet valve is simulated and further verified experimentally. Based on validated simulation models, the impacts of key parameters are researched. The limited pressure difference affected by environmental temperatures is experimentally studied, and the amended linear relation is given according to the test data. © 2013 ISA. Published by Elsevier Ltd. All rights reserved.

  5. Near net shape, low cost ceramic valves for advanced engine applications

    Energy Technology Data Exchange (ETDEWEB)

    Pidria, M.; Merlone, E.; Parussa, F. [Fiat Research Centre, Orbassano (Italy); Handelsman, J.; Gorodnev, A. [Ceracom Materials Ltd., Yavneh (Israel)

    2003-07-01

    Future gasoline and diesel engines with electro-hydraulic or electro-mechanical valve control systems require the development of lighter valves to achieve the best results in terms of increased performances, lower fuel consumption and overall efficiency. Ceramic materials can adequately satisfy the required mechanical and thermal properties, nevertheless they still lack as far as manufacturing costs are concerned. Objective of the work was the development of a low-cost forming and sintering process, to produce near-net shape ceramic valves thus requiring very low finishing operations and significantly minimizing material waste. Between available technical ceramic materials, silicon nitride has been chosen to replace conventional steels and Ni-based alloys for the exhaust valves application. The work was then devoted to (i) the selection of the best starting materials composition, taking into account the requirements of a cost effective and high volume production, (ii) the development of an innovative pressure-injection molding process to produce near-net shape parts via a thermosetting feedstock and (iii) the optimization of a proper pressure-less sintering route to obtain cost-competitive, real scale components with adequate final density and mechanical properties. (orig.)

  6. Development of a 1200 KW/CYL low pressure dual fuel engine for LNG carriers

    Energy Technology Data Exchange (ETDEWEB)

    Grosshans, G. [S.E.M.T.-Pielstick, Thermodynamical Project Dept. (France)

    1998-12-31

    This paper describes the design and feasibility tests of a 570 mm bore 4 stroke low pressure (L.P.) dual fuel engine rated at 20.9 bar BMEP meant for the propulsion of LNG carriers. The basic design features which are to be in accordance with classification societies safety rules are described: individual electro hydraulic valves located in the air manifold ducts, pilot injection, monitoring system etc. The engine capability to burn variable liquid/gas fuel proportions have been investigated with diesel oil and heavy fuel and possible running zones are defined. This ensures the possibility of the engine to cope with the different boil off gas quantity emanating from the ship`s tank during her loaded - and ballast - journeys. With the very lean setting of this engine, no adverse influence of the high ash lube-oil additives were found during the tests. Further tests are necessary to confirm that possible more significant fouling of the combustion chamber is still acceptable. (au)

  7. Design and development of a direct injection system for cryogenic engines

    Science.gov (United States)

    Mutumba, Angela; Cheeseman, Kevin; Clarke, Henry; Wen, Dongsheng

    2018-04-01

    The cryogenic engine has received increasing attention due to its promising potential as a zero-emission engine. In this study, a new robust liquid nitrogen injection system was commissioned and set up to perform high-pressure injections into an open vessel. The system is used for quasi-steady flow tests used for the characterisation of the direct injection process for cryogenic engines. An electro-hydraulic valve actuator provides intricate control of the valve lift, with a minimum cycle time of 3 ms and a frequency of up to 20 Hz. With additional sub-cooling, liquid phase injections from 14 to 94 bar were achieved. Results showed an increase in the injected mass with the increase in pressure, and decrease in temperature. The injected mass was also observed to increases linearly with the valve lift. Better control of the injection process, minimises the number of variables, providing more comparable and repeatable sets of data. Implications of the results on the engine performance were also discussed.

  8. Design method for marine direct drive volume control ahead actuator

    Directory of Open Access Journals (Sweden)

    WANG Haiyang

    2018-02-01

    Full Text Available [Objectives] In order to reduce the size, weight and auxiliary system configuration of marine ahead actuators, this paper proposes a kind of direct drive volume control electro-hydraulic servo ahead actuator. [Methods] The protruding and indenting control of the servo oil cylinder are realized through the forward and reverse of the bidirectional working gear pump, and the flow matching valve implements the self-locking of the ahead actuator in the target position. The mathematical model of the ahead actuator is established, and an integral separation fuzzy PID controller designed. On this basis, using AMESim software to build a simulation model of the ahead actuator, and combined with testing, this paper completes an analysis of the control strategy research and dynamic and static performance of the ahead actuator. [Results] The experimental results agree well with the simulation results and verify the feasibility of the ahead actuator's design. [Conclusions] The research results of this paper can provide valuable references for the integration and miniaturization design of marine ahead actuators.

  9. Circuit card failures and industry mitigation strategy

    Energy Technology Data Exchange (ETDEWEB)

    Mondal, U. [Candu Owners Group, Toronto, Ontario (Canada)

    2012-07-01

    In recent years the nuclear industry has experienced an increase in circuit card failures due to ageing of components, inadequate Preventive Maintenance (PM), lack of effective circuit card health monitoring, etc. Circuit card failures have caused loss of critical equipment, e.g., electro hydraulic governors, Safety Systems, resulting in loss of function and in some cases loss of generation. INPO completed a root cause analysis of 40 Reactor Trips/Scrams in US reactors and has recommended several actions to mitigate Circuit Card failures. Obsolescence of discrete components has posed many challenges in conducting effective preventative maintenance on circuit cards. In many cases, repairs have resulted in installation of components that compromise performance of the circuit cards. Improper termination and worn edge connectors have caused intermittent contacts contributing to circuit card failures. Traditionally, little attention is paid to relay functions and preventative maintenance of relay. Relays contribute significantly to circuit card failures and have dominated loss of generation across the power industry. The INPO study recommended a number of actions to mitigate circuit card failures, such as; identification of critical components and single point vulnerabilities; strategic preventative maintenance; protection of circuit boards against electrostatic discharge; limiting power cycles; performing an effective burn-in prior to commissioning of the circuit cards; monitoring performance of DC power supplies; limiting cabinet temperatures; managing of component aging/degradation mechanism, etc. A subcommittee has been set up under INPO sponsorship to understand the causes of circuit card failure and to develop an effective mitigation strategy. (author)

  10. High energy devices versus low energy devices in orthopedics treatment modalities

    Science.gov (United States)

    Schultheiss, Reiner

    2003-10-01

    The orthopedic consensus group defined in 1997 the 42 most likely relevant parameters of orthopedic shock wave devices. The idea of this approach was to correlate the different clinical outcomes with the physical properties of the different devices with respect to their acoustical waves. Several changes in the hypothesis of the dose effect relationship have been noticed since the first orthopedic treatments. The relation started with the maximum pressure p+, followed by the total energy, the energy density; and finally the single treatment approach using high, and then the multiple treatment method using low energy. Motivated by the reimbursement situation in Germany some manufacturers began to redefine high and low energy devices independent of the treatment modality. The OssaTron as a high energy, single treatment electro hydraulic device gained FDA approval as the first orthopedic ESWT device for plantar fasciitis and, more recently, for lateral epicondylitis. Two low energy devices have now also gained FDA approval based upon a single treatment. Comparing the acoustic data, differences between the OssaTron and the other devices are obvious and will be elaborated upon. Cluster analysis of the outcomes and the acoustical data are presented and new concepts will be suggested.

  11. Material characterization and evaluation of Fyrquel effect on the metal part of filters in a system EHC; Caracterizacion del material y evaluacion del efecto del Fyrquel en la parte metalica de filtros en un sistema EHC

    Energy Technology Data Exchange (ETDEWEB)

    Diaz S, A.; Zenteno S, J.; Robles P, E.; Contreras R, A.; Arganis J, C. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Griz C, M., E-mail: angeles.diaz@inin.gob.mx [Comision Federal de Electricidad, Central Nucleoelectrica Laguna Verde, Carretera Cardel-Nautla Km. 42.5, Veracruz (Mexico)

    2014-10-15

    In recent years, unexpected stoppages in power plants have been associated with problems in electro-hydraulic control systems (EHC) which generally operate with fluids to high pressure resistant to fire, but sensitive to the presence of water and contaminants that can promote damage and malfunction of government and discharge valves. The analysis here presented was performed to two filters prior to the servo valves of an EHC system that came out of service as a result of damage to these components. The study is based on analysis and inspection of metal and filter elements of these devices, integrating both chemical characterization by energy-dispersive X-ray spectroscopy of waste as materials that comprise both filters. The assessment made allowed documenting a poor design of the devices, same that promoted the stagnant fluid (Fyrquel), locally modifying the chemical composition of the medium, prompting the activation of auto-catalytic degradation processes that acidified the environment; the acid ph solutions began in susceptible sites of electrochemical corrosion processes which increased the Fyrquel contamination. (Author)

  12. Switching sliding mode force tracking control of piezoelectric-hydraulic pump-based friction element actuation systems for automotive transmissions

    Science.gov (United States)

    Kim, Gi-Woo; Wang, K. W.

    2009-08-01

    In this study, a nonlinear sliding-mode controller is designed for force tracking of a piezoelectric-hydraulic pump (PHP)-based actuation system, which is developed to replace the current electro-hydraulic actuation systems for automatic transmission (AT) friction elements, such as band brakes or clutches. By utilizing the PHP, one can eliminate the various hydraulic components (oil pump, regulating valve and control valve) in current ATs and achieve a simpler configuration with more efficient operation. With the derived governing equation of motion of the PHP-based actuation system integrated with the friction element (band brake), a switching control law is synthesized based on the sliding-mode theory. To evaluate the effectiveness of the proposed control law, its force tracking performance for the engagement of a friction element during an AT 1\\to 2 up-shift is examined experimentally. It is shown that one can successfully track the desired force trajectory for AT shift control with small tracking error. This study demonstrates the potential of the PHP as a new controllable actuation system for AT friction elements.

  13. Switching sliding mode force tracking control of piezoelectric-hydraulic pump-based friction element actuation systems for automotive transmissions

    International Nuclear Information System (INIS)

    Kim, Gi-Woo; Wang, K W

    2009-01-01

    In this study, a nonlinear sliding-mode controller is designed for force tracking of a piezoelectric-hydraulic pump (PHP)-based actuation system, which is developed to replace the current electro-hydraulic actuation systems for automatic transmission (AT) friction elements, such as band brakes or clutches. By utilizing the PHP, one can eliminate the various hydraulic components (oil pump, regulating valve and control valve) in current ATs and achieve a simpler configuration with more efficient operation. With the derived governing equation of motion of the PHP-based actuation system integrated with the friction element (band brake), a switching control law is synthesized based on the sliding-mode theory. To evaluate the effectiveness of the proposed control law, its force tracking performance for the engagement of a friction element during an AT 1→2 up-shift is examined experimentally. It is shown that one can successfully track the desired force trajectory for AT shift control with small tracking error. This study demonstrates the potential of the PHP as a new controllable actuation system for AT friction elements

  14. A universal suspension test rig for electrohydraulic active and passive automotive suspension system

    Directory of Open Access Journals (Sweden)

    Mahmoud Omar

    2017-12-01

    Full Text Available A fully active electro-hydraulic and passive automotive quarter car suspensions with their experimental test-rigs are designed and implemented. Investigation of the active performance compared against the passive is performed experimentally and numerically utilizing SIMULINK's Simscape library. Both systems are modeled as single-degree-of-freedom in order to simplify the validation process. Economic considerations were considered during the rig's implementation. The rig consists of two identical platforms fixed side by side allowing testing two independent suspensions simultaneously. Position sensors for sprung and unsprung masses on both platforms are installed. The road input is introduced by a cam and a roller follower mechanism driven by 1.12 kW single phase induction motor with speed reduction assembly. The active hydraulic cylinder was the most viable choice due to its high power-to-weight ratio. The active control is of the proportional-integral-differential (PID type. Though this technique is quite simple and not new, yet the emphasis of this paper is the engineering, design and implementation of the experimental setup and controller. A successful validation process is performed. Ride comfort significantly improved with active suspension, as shown by the results; 24.8% sprung mass vibration attenuation is achieved. The details of the developed system with the analytical and experimental results are presented. Keywords: Active suspension, Passive suspension, Servo, Hydraulic, Control, PID

  15. Online Wavelet Complementary velocity Estimator.

    Science.gov (United States)

    Righettini, Paolo; Strada, Roberto; KhademOlama, Ehsan; Valilou, Shirin

    2018-02-01

    In this paper, we have proposed a new online Wavelet Complementary velocity Estimator (WCE) over position and acceleration data gathered from an electro hydraulic servo shaking table. This is a batch estimator type that is based on the wavelet filter banks which extract the high and low resolution of data. The proposed complementary estimator combines these two resolutions of velocities which acquired from numerical differentiation and integration of the position and acceleration sensors by considering a fixed moving horizon window as input to wavelet filter. Because of using wavelet filters, it can be implemented in a parallel procedure. By this method the numerical velocity is estimated without having high noise of differentiators, integration drifting bias and with less delay which is suitable for active vibration control in high precision Mechatronics systems by Direct Velocity Feedback (DVF) methods. This method allows us to make velocity sensors with less mechanically moving parts which makes it suitable for fast miniature structures. We have compared this method with Kalman and Butterworth filters over stability, delay and benchmarked them by their long time velocity integration for getting back the initial position data. Copyright © 2017 ISA. Published by Elsevier Ltd. All rights reserved.

  16. An Online Fault Pre-warning System of the Rolling Mill Screw-down Device Based on Virtual Instrument

    Directory of Open Access Journals (Sweden)

    Qing Bai

    2014-04-01

    Full Text Available A traditional off-line screw-down monitoring system performs not well on real-time signal analysis or process, which cannot provide simultaneous fault pre-warning either. A diagnostic monitoring system as well as a remotely accessible graphic user interface is presented in this paper. The main objective of this work is to develop an online and available technique for monitoring the kinetic, hydrodynamic and electrical parameters of the rolling mill screw-down device, and analyze these figures to support online fault pre-warning. A series of transducers are installed in suitable locations to measure parameters decried above including the vibration acceleration of a rolling mill stand, the rolling force of a screw-down device, the stroke of a hydraulic cylinder, the system source pressure, the in-cylinder stress and the output value of an electro-hydraulic servo valve. An industrial personal computer picks up the information transformed by an extra high-speed data acquisition board embedded inside, processes the signals via a software designed by means of Laborary Virtual Instrument Engineering Workbench (LabVIEW and indicates fault conditions through the graphic user interface. Besides, the data of the overall system can be published over the Internet using LabVIEW Web Server capabilities. The results of experiments suggest that the system works well on real-time data acquisition and online fault pre- warning. The statistics saved contributes to the research of vibration performance and malfunction analysis of a rolling mill.

  17. Design of Servo Scheme and Drive Electronics for the Integrated Electrohydraulic Actuation System of RLV-TD

    Science.gov (United States)

    Kurian, Priya C.; Gopinath, Anish; Shinoy, K. S.; Santhi, P.; Sundaramoorthy, K.; Sebastian, Baby; Jaya, B.; Namboodiripad, M. N.; Mookiah, T.

    2017-12-01

    Reusable Launch Vehicle-Technology Demonstrator (RLV-TD) is a system which has the ability to carry a payload from the earth's surface to the outer space more than once. The control actuation forms the major component of the control system and it actuates the control surfaces of the RLV-TD based on the control commands. Eight electro hydraulic actuators were used in RLV-TD for vectoring the control surfaces about their axes. A centralised Hydraulic Power Generating Unit (HPU) was used for powering the eight actuators located in two stages. The actuation system had to work for the longest ever duration of about 850 s for an Indian launch vehicle. High bandwidth requirement from autopilot was met by the servo design using the nonlinear mathematical model. Single Control Electronics which drive four electrohydraulic actuators was developed for each stage. High power electronics with soft start scheme was realized for driving the BLDC motor which is the prime mover for hydraulic pump. Many challenges arose due to single HPU for two stages, uncertainty of aero load, higher bandwidth requirements etc. and provisions were incorporated in the design to successfully overcome them. This paper describes the servo design and control electronics architecture of control actuation system.

  18. Linear Extended State Observer-Based Motion Synchronization Control for Hybrid Actuation System of More Electric Aircraft

    Directory of Open Access Journals (Sweden)

    Xingjian Wang

    2017-10-01

    Full Text Available Moving towards the more electric aircraft (MEA, a hybrid actuator configuration provides an opportunity to introduce electromechanical actuator (EMA into primary flight control. In the hybrid actuation system (HAS, an electro-hydraulic servo actuator (EHSA and an EMA operate on the same control surface. In order to solve force fighting problem in HAS, this paper proposes a novel linear extended state observer (LESO-based motion synchronization control method. To cope with the problem of unavailability of the state signals required by the motion synchronization controller, LESO is designed for EHSA and EMA to observe the state variables. Based on the observed states of LESO, motion synchronization controllers could enable EHSA and EMA to simultaneously track the desired motion trajectories. Additionally, nonlinearities, uncertainties and unknown disturbances as well as the coupling term between EHSA and EMA can be estimated and compensated by using the extended state of the proposed LESO. Finally, comparative simulation results indicate that the proposed LESO-based motion synchronization controller could reduce significant force fighting between EHSA and EMA.

  19. Linear Extended State Observer-Based Motion Synchronization Control for Hybrid Actuation System of More Electric Aircraft

    Science.gov (United States)

    Liao, Rui; Shi, Cun; Wang, Shaoping

    2017-01-01

    Moving towards the more electric aircraft (MEA), a hybrid actuator configuration provides an opportunity to introduce electromechanical actuator (EMA) into primary flight control. In the hybrid actuation system (HAS), an electro-hydraulic servo actuator (EHSA) and an EMA operate on the same control surface. In order to solve force fighting problem in HAS, this paper proposes a novel linear extended state observer (LESO)-based motion synchronization control method. To cope with the problem of unavailability of the state signals required by the motion synchronization controller, LESO is designed for EHSA and EMA to observe the state variables. Based on the observed states of LESO, motion synchronization controllers could enable EHSA and EMA to simultaneously track the desired motion trajectories. Additionally, nonlinearities, uncertainties and unknown disturbances as well as the coupling term between EHSA and EMA can be estimated and compensated by using the extended state of the proposed LESO. Finally, comparative simulation results indicate that the proposed LESO-based motion synchronization controller could reduce significant force fighting between EHSA and EMA. PMID:29068392

  20. Material characterization and evaluation of Fyrquel effect on the metal part of filters in a system EHC

    International Nuclear Information System (INIS)

    Diaz S, A.; Zenteno S, J.; Robles P, E.; Contreras R, A.; Arganis J, C.; Griz C, M.

    2014-10-01

    In recent years, unexpected stoppages in power plants have been associated with problems in electro-hydraulic control systems (EHC) which generally operate with fluids to high pressure resistant to fire, but sensitive to the presence of water and contaminants that can promote damage and malfunction of government and discharge valves. The analysis here presented was performed to two filters prior to the servo valves of an EHC system that came out of service as a result of damage to these components. The study is based on analysis and inspection of metal and filter elements of these devices, integrating both chemical characterization by energy-dispersive X-ray spectroscopy of waste as materials that comprise both filters. The assessment made allowed documenting a poor design of the devices, same that promoted the stagnant fluid (Fyrquel), locally modifying the chemical composition of the medium, prompting the activation of auto-catalytic degradation processes that acidified the environment; the acid ph solutions began in susceptible sites of electrochemical corrosion processes which increased the Fyrquel contamination. (Author)

  1. Experimental Study on Shear Performance of Bolt in Roadway Supporting

    Directory of Open Access Journals (Sweden)

    D.J. Li

    2014-09-01

    Full Text Available The corner bolt is proved to be effective in the control of floor deformation of roadway, and the relevant studies on bolting mechanisms are of great significance in improving roadway stability. In this paper, two types of shear tests on six forms of bolts are performed by using self-designed shear test device, the electro-hydraulic servo triaxial testing system. The shear characteristics of different types of bolts are obtained. The results show that different bolt rods or different internal filling conditions result in large differences in shear resistance and different deformation adaptability. We find that the filling materials added can improve the shear performance of bolt significantly, and the bolt with steel not only can improve the strength of bolt body, but also has the bimodal characteristic that makes the bolt have the secondary bearing capacity and withstand larger deformation range during the process of shear, and shows a better support performance. Hoping to provide the experiment basis for support design and field application in the future.

  2. Study on the key technologies of the Transfer Equipment Cask for Tokamak Equator Port Plug

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Buyun, E-mail: ayun@iim.ac.cn [Department of Automation, University of Science and Technology of China, Hefei, Anhui 230027 (China); Robot Sensors and Human-Machine Interaction Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Gao, Lifu [Department of Automation, University of Science and Technology of China, Hefei, Anhui 230027 (China); Robot Sensors and Human-Machine Interaction Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Cao, Huibin; Sun, Jian [Robot Sensors and Human-Machine Interaction Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031 (China); Sun, Yuxiang; Song, Quanjun; Ma, Chengxue; Chang, Li; Shuang, Feng [Department of Automation, University of Science and Technology of China, Hefei, Anhui 230027 (China); Robot Sensors and Human-Machine Interaction Laboratory, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei, Anhui 230031 (China)

    2014-12-15

    Highlights: • Design on Intelligent Air Transfer System (IATS) for Transfer Equipment Cask (TECA). • A rhombic-like parallel robot for docking with minimum misalignment. • Design on electro-hydraulic servo system of the TECA for Tokamak Equator Port Plug (TEPP) manipulation. • A control architecture with several algorithms and information acquired from sensors could be used by the TECA for Remote Handling (RH). - Abstract: The Transfer Equipment Cask (TECA) is a key solution for Remote Handling (RH) in Tokamak Equator Port Plug (TEPP) operations. From the perspectives of both engineering and technical designs of effective experiments on the TEPP, key technologies on these topics covering the TECA are required. According to conditions in ITER (International Thermonuclear Experimental Reactor) and features of the TEPP, this paper introduces the design of an Intelligent Air Transfer System (IATS) with an adaptive attitude and high precision positioning that transports a cask system of more than 30 tons from the Tokamak Building (TB) to the Hot Cell Building (HCB). Additionally, different actuators are discussed, and the hydraulic power drive is eventually selected and designed. A rhombic-like parallel robot is capable of being used for docking with minimum misalignment. Practical mechanisms of the cask system are presented for hostile environments. A control architecture with several algorithms and information acquired from sensors could be used by the TECA. These designs yield realistic and extended applications for the RH of ITER.

  3. Reducing commercial fishing deck hazards with engineering solutions for winch design.

    Science.gov (United States)

    Lincoln, Jennifer M; Lucas, Devin L; McKibbin, Robert W; Woodward, Chelsea C; Bevan, John E

    2008-01-01

    The majority (67%) of hospitalized injuries among Alaska commercial fishermen are associated with deck machinery. This paper describes the "Prevention Through Design" process to mitigate one serious machinery entanglement hazard posed by a capstan deck winch. After observing that the capstan winch provides no entanglement protection and the hydraulic controls are usually out of reach of the entangled person, NIOSH personnel met with fishermen and winch manufacturers to discuss various design solutions to mitigate these hazards. An emergency-stop ("e-stop") system was developed that incorporated a momentary contact button that when pushed, switches a safety-relay that de-energizes the solenoid of an electro-hydraulic valve stopping the rotating winch. The vessel owners that had the e-stop installed enthusiastically recommend it to other fishermen. NIOSH entered into a Proprietary Technology Licensing Agreement with a company to develop the system for commercial use. This is an example of a practical engineering control that effectively protects workers from a hazardous piece of equipment by preventing injuries due to entanglement. This solution could reduce these types of debilitating injuries and fatalities in this industry.

  4. Multiaxial Fatigue Properties of 2A12 Aluminum Alloy Under Different Stress Amplitude Ratio Loadings

    Directory of Open Access Journals (Sweden)

    CHEN Ya-jun

    2017-09-01

    Full Text Available The multiaxial fatigue behavior of 2A12 aluminum alloy was studied with SDN100/1000 electro-hydraulic servo tension-torsion fatigue tester under different stress amplitude ratios, the fracture morphology and the fatigue loading curve were observed to study the failure mechanism. The results show that, under the one stage loading condition, the fatigue life prolongs with the stress amplitude ratio increasing. Under pure torsion loading, smooth and even area exists in the fracture surface. As the stress amplitude ratio increases, the number of scratch reduces, the fatigue striation and some special morphology such as the fishbone pattern, scale pattern and honeycomb pattern can be observed; under cumulative paths of different stress amplitude ratios, the variation of multiaxial fatigue life changes with first stage loading cycles; under cumulative paths of high-low stress amplitude ratio, the cycle hardening occurs obviously in the axial direction for the first stage high stress amplitude ratio loading and 2A12 alloy shows training effect.

  5. Improve the Efficiency of the Service Process as a Result of the Muda Ideology

    Science.gov (United States)

    Lorenc, Augustyn; Przyłuski, Krzysztof

    2018-06-01

    The aim of the paper was to improve service processes carried out by Knorr-Bremse Systemy Kolejowe Polska sp. z o.o. Particularly, emphasise unnecessary movements and physical efforts of employees. The indirect goal was to find a solution in the simplest possible way using the Muda ideology. In order to improve the service process at the beginning was executed the process mapping for the devices to be repaired, ie. brake callipers, electro-hydraulic units and auxiliary release units. The processes were assessed and shown as Pareto-Lorenz analysis. In order to determine the most time consuming process. Based on the obtained results use of a column crane with articulated arm was proposed to facilitate the transfer of heavy components between areas. The final step was to assess the effectiveness of the proposed solution in terms of time saving. From the company perspective results of the analysis are important. The proposed solution not only reduces total service time but also contributes to crew's work comfort.

  6. Global developments of controls of powered roof supports

    Energy Technology Data Exchange (ETDEWEB)

    Das, S.K. [Indian School of Mines, Dhanbad (India). Centre of Longwall Mine Mechanisation

    1996-04-01

    The efficiency of hydraulic powered roof support systems mainly depends upon the efficient control and operation of hydraulic valves and their associated accessories. From 1961 to 1994 tremendous efforts had been made for the development of higher and higher efficient, reliable but simpler control systems starting from the manual hydraulic to electro-hydraulic and finally computer based electronic control system. A global survey of development of various types and design of control systems of powered roof supports has been made and many of them are highlighted in the paper for making this work a small emblem regarding the efforts of development of the controls of powered roof support systems by the global engineers of the 20th century. Many of the control systems are no longer in use and have totally vanished from this earth and many more control systems including their literatures may vanish from this world in the coming decades. This work may give a guideline regarding the selection of right type of control systems for the powered supports in future. 14 refs., 6 figs.

  7. A vehicle stability control strategy with adaptive neural network sliding mode theory based on system uncertainty approximation

    Science.gov (United States)

    Ji, Xuewu; He, Xiangkun; Lv, Chen; Liu, Yahui; Wu, Jian

    2018-06-01

    Modelling uncertainty, parameter variation and unknown external disturbance are the major concerns in the development of an advanced controller for vehicle stability at the limits of handling. Sliding mode control (SMC) method has proved to be robust against parameter variation and unknown external disturbance with satisfactory tracking performance. But modelling uncertainty, such as errors caused in model simplification, is inevitable in model-based controller design, resulting in lowered control quality. The adaptive radial basis function network (ARBFN) can effectively improve the control performance against large system uncertainty by learning to approximate arbitrary nonlinear functions and ensure the global asymptotic stability of the closed-loop system. In this paper, a novel vehicle dynamics stability control strategy is proposed using the adaptive radial basis function network sliding mode control (ARBFN-SMC) to learn system uncertainty and eliminate its adverse effects. This strategy adopts a hierarchical control structure which consists of reference model layer, yaw moment control layer, braking torque allocation layer and executive layer. Co-simulation using MATLAB/Simulink and AMESim is conducted on a verified 15-DOF nonlinear vehicle system model with the integrated-electro-hydraulic brake system (I-EHB) actuator in a Sine With Dwell manoeuvre. The simulation results show that ARBFN-SMC scheme exhibits superior stability and tracking performance in different running conditions compared with SMC scheme.

  8. Inhibition of soluble epoxide hydrolase attenuates hepatic fibrosis and endoplasmic reticulum stress induced by carbon tetrachloride in mice

    International Nuclear Information System (INIS)

    Harris, Todd R.; Bettaieb, Ahmed; Kodani, Sean; Dong, Hua; Myers, Richard; Chiamvimonvat, Nipavan; Haj, Fawaz G.; Hammock, Bruce D.

    2015-01-01

    Liver fibrosis is a pathological condition in which chronic inflammation and changes to the extracellular matrix lead to alterations in hepatic tissue architecture and functional degradation of the liver. Inhibitors of the enzyme soluble epoxide hydrolase (sEH) reduce fibrosis in the heart, pancreas and kidney in several disease models. In this study, we assess the effect of sEH inhibition on the development of fibrosis in a carbon tetrachloride (CCl 4 )-induced mouse model by monitoring changes in the inflammatory response, matrix remolding and endoplasmic reticulum stress. The sEH inhibitor 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU) was administered in drinking water. Collagen deposition in the liver was increased five-fold in the CCl 4 -treated group, and this was returned to control levels by TPPU treatment. Hepatic expression of Col1a2 and 3a1 mRNA was increased over fifteen-fold in the CCl 4 -treated group relative to the Control group, and this increase was reduced by 50% by TPPU treatment. Endoplasmic reticulum (ER) stress observed in the livers of CCl 4 -treated animals was attenuated by TPPU treatment. In order to support the hypothesis that TPPU is acting to reduce the hepatic fibrosis and ER stress through its action as a sEH inhibitor we used a second sEH inhibitor, trans-4-(4-[3-(4-trifluoromethoxy-phenyl)-ureido]-cyclohexyloxy)-benzoic acid (t-TUCB), and sEH null mice. Taken together, these data indicate that the sEH may play an important role in the development of hepatic fibrosis induced by CCl 4 , presumably by reducing endogenous fatty acid epoxide chemical mediators acting to reduce ER stress. - Highlights: • We administer an inhibitor of sEH in a CCl4 murine model. • sEH inhibition reduces liver collagen deposition and pro-fibrotic gene expression. • sEH inhibition induces MMP-1a activity

  9. Vulnerability to extreme-heat-associated hospitalization in three counties in Michigan, USA, 2000-2009

    Science.gov (United States)

    Ogbomo, Adesuwa S.; Gronlund, Carina J.; O'Neill, Marie S.; Konen, Tess; Cameron, Lorraine; Wahl, Robert

    2017-05-01

    With climate change, extreme heat (EH) events are increasing, so it is important to understand who is vulnerable to heat-associated morbidity. We determined the association between EH and hospitalizations for all natural causes; cardiovascular, respiratory, and renal diseases; diabetes mellitus; and acute myocardial infarction in Michigan, USA, at different intensities and durations. We assessed confounding by ozone and how individual characteristics and health insurance payer (a proxy for income) modified these associations. We obtained Michigan Inpatient Database, National Climatic Data Center, and US Environmental Protection Agency ozone data for May-September, 2000-2009 for three Michigan counties. We employed a case-crossover design and modeled EH as an indicator for temperature above the 95th, 97th, or 99th percentile thresholds for 1, 2, 3, or 4 days. We examined effect modification by patient age, race, sex, and health insurance payer and pooled the county results. Among non-whites, the pooled odds ratio for hospitalization on EH (97th percentile threshold) vs. non-EH days for renal diseases was 1.37 (95 % CI = 1.13-1.66), which increased with increasing EH intensity, but was null among whites (OR = 1.00, 95 % CI = 0.81, 1.25). We observed a null association between EH and cardiovascular hospitalization. EH (99th percentile threshold) was associated with myocardial infarction hospitalizations. Confounding by ozone was minimal. EH was associated with hospitalizations for renal disease among non-whites. This information on vulnerability to heat-associated morbidity helps characterize the public health burden of EH and target interventions including patient education.

  10. Improvements Realized on the NiThrow{sup TM} Solution - 13075

    Energy Technology Data Exchange (ETDEWEB)

    Moggia, F.; Objois, L.; Damerval, F. [AREVA - Clean-Up BU - 1, route de la Noue - 91196 Gif-sur-Yvette (France); Toulemonde, V. [AREVA - R and D Corporate - 1, place Jean Miller - 92084 - Paris La Defense (France); Varet, T. [AREVA - D and D BU - 1, place Jean Miller - Paris La Defense (France); Guillot, S. [AREVA Federal Services LLC - 2101 Horn Rapids Road Richland, WA 99354-5102 (United States); Richard, F. [Air Liquide - Research Center - 13, rue d' Epluches - 95310 St Ouen L' Aumone (France)

    2013-07-01

    Two years ago we presented the first results obtained with the highly pressurized liquid nitrogen technology (HPLN) in case of cutting, surface decontamination and concrete scabbling applications. These results, carried out in non active conditions, were really promising in term of efficiency and productivity and highlighted how this technology was interesting for D and D business (e.g. cut of depth up to 30 mm for concrete scabbling application; productivity of 4 cm.min{sup -1} in case of the cut of a 50 mm thick stainless steel ingot..). We also found some real issues which were not compatible with its use in a radioactive environment. Indeed, the reliability of some parts of the system was not efficient enough (e.g. lancing tool, intensifiers...) to run the HPLN technology in good conditions. More than two years, after a complete study of the whole system, and after the compilation of all the required troubleshooting, AREVA with its partner Air Liquide, decided to start a complete R and D work in order to improve this cryogenic technology. Our engineers started with the lancing tool and designed a new one lighter and more reliable than the original one. After that, they improved the reliability of the pressurization unit (skid) by changing seals and other parts. As mentioned above, the goal of this work was to implement this technology in a nuclear environment the best way. We also focused our efforts on the insulation of the high pressure hoses (with a maximal distance, between the 'skid - Heat exchanger' module and the lancing tool, of about 110 meters), and on the development of a quite efficient vacuum system comprising dust collection units (we can guarantee an efficiency of our system higher than 95%). Finally, the last step of our development was devoted to the design and the manufacturing of a dedicated carrier enabling the technology to move in all directions (X,Y and Z) and to reach all the positions (wall, ground, ceiling and for sure all

  11. Improvements Realized on the NiThrowTM Solution - 13075

    International Nuclear Information System (INIS)

    Moggia, F.; Objois, L.; Damerval, F.; Toulemonde, V.; Varet, T.; Guillot, S.; Richard, F.

    2013-01-01

    Two years ago we presented the first results obtained with the highly pressurized liquid nitrogen technology (HPLN) in case of cutting, surface decontamination and concrete scabbling applications. These results, carried out in non active conditions, were really promising in term of efficiency and productivity and highlighted how this technology was interesting for D and D business (e.g. cut of depth up to 30 mm for concrete scabbling application; productivity of 4 cm.min -1 in case of the cut of a 50 mm thick stainless steel ingot..). We also found some real issues which were not compatible with its use in a radioactive environment. Indeed, the reliability of some parts of the system was not efficient enough (e.g. lancing tool, intensifiers...) to run the HPLN technology in good conditions. More than two years, after a complete study of the whole system, and after the compilation of all the required troubleshooting, AREVA with its partner Air Liquide, decided to start a complete R and D work in order to improve this cryogenic technology. Our engineers started with the lancing tool and designed a new one lighter and more reliable than the original one. After that, they improved the reliability of the pressurization unit (skid) by changing seals and other parts. As mentioned above, the goal of this work was to implement this technology in a nuclear environment the best way. We also focused our efforts on the insulation of the high pressure hoses (with a maximal distance, between the 'skid - Heat exchanger' module and the lancing tool, of about 110 meters), and on the development of a quite efficient vacuum system comprising dust collection units (we can guarantee an efficiency of our system higher than 95%). Finally, the last step of our development was devoted to the design and the manufacturing of a dedicated carrier enabling the technology to move in all directions (X,Y and Z) and to reach all the positions (wall, ground, ceiling and for sure all the singularities

  12. On Electron Hole Evolution in Inhomogeneous Plasmas

    Science.gov (United States)

    Kuzichev, I.; Vasko, I.; Agapitov, O. V.; Mozer, F.; Artemyev, A.

    2017-12-01

    Electron holes (EHs) are the stationary localized non-linear structures in phase space existing due to an electron population trapped within EH electrostatic potential. EHs were found to be a common phenomenon in the Earth's magnetosphere. Such structures were observed in reconnecting current sheets, injection fronts in the outer radiation belt, and in many other situations. EHs usually propagate along magnetic field lines with velocities about electron thermal velocity, are localized on the scale of about 4-10 Debye lengths, and have the field amplitude up to hundreds of mV/m. Generation of these structures, evolution, and their role in relaxation of instabilities and energy dissipation, particle energization, supporting large-scale potential drops is under active investigation. In this report, we present the results of 1.5D gyrokinetic Vlasov-Maxwell simulations of the EH evolution in plasmas with inhomogeneous magnetic field and inhomogeneous density. Our calculations show that the inhomogeneity has a critical effect on the EH dynamics. EHs propagating into stronger (weaker) magnetic field are decelerated (accelerated) with deceleration (acceleration) rate dependent on the magnetic field gradient. During the deceleration of EH, the potential drop (weak double layer) along EH is generated. Such a potential drop might be experimentally observable even for single EH in the reconnecting current sheets. The same holds for the propagation in the plasma with inhomogeneous density. For some parameters of the system, the deceleration results in the turning of the hole. The interesting feature of this process is that the turning point depends only on the EH parameters, being independent of the average inhomogeneity scale. Our calculations also demonstrate the significant difference between "quasi-particle" concept and real evolution of the hole. Indeed, the EH is accelerated (decelerated) faster than it follows from a quasi-particle energy conservation law. It indicates

  13. Development of monoclonal antibodies to human microsomal epoxide hydrolase and analysis of “preneoplastic antigen”-like molecules

    Energy Technology Data Exchange (ETDEWEB)

    Duan, Hongying [Department of Microbiology, Faculty of Medicine, Saitama Medical University, Moroyama-cho, Iruma-gun, Saitama 350-0495 (Japan); Yoshimura, Kazunori [Department of Physiology, Faculty of Medicine, Saitama Medical University, Moroyama-cho, Iruma-gun, Saitama 350-0495 (Japan); Kobayashi, Nobuharu; Sugiyama, Kazuo [Department of Microbiology, Faculty of Medicine, Saitama Medical University, Moroyama-cho, Iruma-gun, Saitama 350-0495 (Japan); Sawada, Jun-ichi; Saito, Yoshiro [Division of Biochemistry and Immunochemistry, National Institute of Health Sciences, Kamiyoga 1-18-1, Setagaya-ku, Tokyo 158-8501 (Japan); Morisseau, Christophe; Hammock, Bruce D. [Department of Entomology and Cancer Center, University of California, Davis, One Shields Avenue, Davis, CA 95616-8584 (United States); Akatsuka, Toshitaka, E-mail: akatsuka@saitama-med.ac.jp [Department of Microbiology, Faculty of Medicine, Saitama Medical University, Moroyama-cho, Iruma-gun, Saitama 350-0495 (Japan)

    2012-04-01

    Microsomal epoxide hydrolase (mEH) is a drug metabolizing enzyme which resides on the endoplasmic reticulum (ER) membrane and catalyzes the hydration of reactive epoxide intermediates that are formed by cytochrome P450s. mEH is also thought to have a role in bile acid transport on the plasma membrane of hepatocytes. It is speculated that efficient execution of such multiple functions is secured by its orientation and association with cytochrome P450 enzymes on the ER membrane and formation of a multiple transport system on the plasma membrane. In certain disease status, mEH loses its association with the membrane and can be detected as distinct antigens in the cytosol of preneoplastic foci of liver (preneoplastic antigen), in the serum in association with hepatitis C virus infection (AN antigen), or in some brain tumors. To analyze the antigenic structures of mEH in physiological and pathological conditions, we developed monoclonal antibodies against different portions of mEH. Five different kinds of antibodies were obtained: three, anti-N-terminal portions; one anti-C-terminal; and one, anti-conformational epitope. By combining these antibodies, we developed antigen detection methods which are specific to either the membrane-bound form or the linearized form of mEH. These methods detected mEH in the culture medium released from a hepatocellular carcinoma cell line and a glioblastoma cell line, which was found to be a multimolecular complex with a unique antigenic structure different from that of the membrane-bound form of mEH. These antibodies and antigen detection methods may be useful to study pathological changes of mEH in various human diseases. -- Highlights: ► Monoclonal antibodies against different portions of mEH were developed. ► They discriminate between the membrane-bound and the linearized forms of mEH. ► We analyze the antigenic structure of the altered form of mEH in tumor cells. ► Preneoplastic antigen is a multimolecular complex of mEH with

  14. Ovarian expressed microsomal epoxide hydrolase: Role in detoxification of 4-vinylcyclohexene diepoxide and regulation by phosphatidylinositol-3 kinase signaling

    Energy Technology Data Exchange (ETDEWEB)

    Bhattacharya, Poulomi, E-mail: poulomib@iastate.edu [Department of Animal Science, Iowa State University, Ames, IA 50011 (United States); Sen, Nivedita, E-mail: nsen@email.arizona.edu [Department of Physiology, University of Arizona, Tucson, AZ 85724 (United States); Hoyer, Patricia B., E-mail: Hoyer@u.arizona.edu [Department of Physiology, University of Arizona, Tucson, AZ 85724 (United States); Keating, Aileen F., E-mail: akeating@iastate.edu [Department of Animal Science, Iowa State University, Ames, IA 50011 (United States)

    2012-01-01

    4-vinylcyclohexene diepoxide (VCD) is a metabolite of 4-vinylcyclohexene (VCH) which has the potential to be formed in the ovary through CYP2E1 activity. VCD specifically destroys primordial and small primary follicles in the rodent ovary. Mouse ovaries exposed to VCD demonstrate increased mRNA and protein expression of microsomal epoxide hydrolase (mEH), and an inactive tetrol metabolite (4-(1,2-dihydroxy)ethyl-1,2-dihydroxycyclohexane) can be formed in mouse ovarian follicles, potentially through detoxification action of mEH. In contrast, mEH can bioactivate another ovotoxic chemical, 7,12-dimethylbenz[a]anthracene (DMBA) to a more toxic compound, DMBA-3,4-diol-1,2-epoxide. Thus, the present study evaluated a functional role for mEH during detoxification of VCD. Additionally, because inhibition of the phosphatidyinositol-3 kinase (PI3K) signaling pathway in a previous study protected primordial follicles from VCD-induced destruction, but accelerated DMBA-induced ovotoxicity, a role for PI3K in ovarian mEH regulation was evaluated. Using a post-natal day (PND) 4 Fischer 344 rat whole ovary culture system inhibition of mEH using cyclohexene oxide during VCD exposure resulted in a greater (P < 0.05) loss of primordial and small primary follicles relative to VCD-treated ovaries. Also, relative to controls, meh mRNA was increased (P < 0.05) on day 4 of VCD (30 μM) exposure, followed by increased (P < 0.05) mEH protein after 6 days. Furthermore, inhibition of PI3K signaling increased mEH mRNA and protein expression. Thus, these results support a functional role for mEH in the rat ovary, and demonstrate the involvement of PI3K signaling in regulation of ovarian xenobiotic metabolism by mEH. -- Highlights: ► Ovarian mEH functions to metabolize VCD to a less toxic compound. ► mEH expression is increased in a temporal pattern in response to VCD exposure. ► PI3K signaling is involved in regulation of ovarian mEH expression.

  15. Novel molecular determinants of viral susceptibility and resistance in the lipidome of Emiliania huxleyi.

    Science.gov (United States)

    Fulton, James M; Fredricks, Helen F; Bidle, Kay D; Vardi, Assaf; Kendrick, B Jacob; DiTullio, Giacomo R; Van Mooy, Benjamin A S

    2014-04-01

    Viruses play a key role in controlling the population dynamics of algae, including Emiliania huxleyi, a globally distributed haptophyte with calcite coccoliths that comprise ca. 50% of the sinking carbonate flux from the surface ocean. Emiliania huxleyi viruses (EhVs) routinely infect and terminate E. huxleyi blooms. EhVs are surrounded by a lipid envelope, which we found to be comprised largely of glycosphingolipids (GSLs) with lesser amounts of polar glycerolipids. Infection appears to involve membrane fusion between the virus and host, and we hypothesized that specific polar lipids may facilitate virus attachment. We identified three novel intact polar lipids in E. huxleyi strain CCMP 374 and EhV86, including a GSL with a monosaccharide sialic acid headgroup (sGSL); for all 11 E. huxleyi strains we tested, there was a direct relationship between sGSL content and sensitivity to infection by EhV1, EhV86 and EhV163. In mesocosms, the E. huxleyi population with greatest initial sGSL content had the highest rate of virus-induced mortality. We propose potential physiological roles for sGSL that would be beneficial for growth but leave cells susceptible to infection, thus furthering the discussion of Red Queen-based co-evolution and the cost(s) of sensitivity and resistance in the dynamic E. huxleyi-EhV system. © 2013 Society for Applied Microbiology and John Wiley & Sons Ltd.

  16. Laboratory simulation studies of uranium mobility in natural waters

    International Nuclear Information System (INIS)

    Giblin, A.M.; Swaine, D.J.; Batts, B.D.

    1981-01-01

    The effects of imposed variations of pH and Eh on aqueous uranium mobility at 25 0 C have been studied in three simulations of natural water systems. Constituents tested for their effect on uranium mobility were: (a) hydrous ferric oxide, to represent adsorptive solids which precipitate or dissolve in response to variations in pH and Eh; (b) kaolinite, representing minerals which, although modified by pH and Eh changes, are present as solids over the pH-Eh range of natural waters; and (c) carbonate, to represent a strong uranium-complexing species. Uranium mobility measurements from each simulation were regressed against pH and Eh within a range appropriate to natural waters. Hydrous ferric oxide and kaolinite each affected uranium mobility, but in separate pH-Eh domains. Aqueous carbonate increased mobility of uranium, and adsorption of UO 2 (CO 3 ) 3 4- caused colloidal dispersion of hydrous ferric oxide, possibly explaining the presence of 'hydrothermal hematite' in some uranium deposits. Enhanced uranium mobility observed in the pH-Eh domains of thermodynamically insoluble uranium oxides could be explained if the oxides were present as colloids. Uranium persisting as a mobile species, even after reduction, has implications for the near surface genesis of uranium ores. (author)

  17. Application of determination of PRA, Ang II and IGF-1 levels in the study of typing of essential hypertension

    International Nuclear Information System (INIS)

    Lu Yongyi; Chen Qun; Yang Yongqing

    2010-01-01

    Objective: To study the clinical application of determination of plasma renin activity (PRA), Angiotensin II (Ang II ) and insulin-like growth factor-1 (IGF-1) levels in typing of essential hypertension (EH). Methods: Determined the levels of PRA and Aug II in 256 patients with EH and 70 healthy volunteers (as control group) by radioimmunoassay, and measured IGF-1 level by enzyme immunoassay. Research on the typing of EH and the difference between the groups. Results: The PRA and Ang II in control group was (0.432±0.236) μg·L -1 ·h -1 and (31.7±7.4) μg/L respectively. In 256 patients with EH, PRA was increased, normal and decreased in 18.0%, 71.8% and 10.2% respectively, while the level of Ang II was increased, normal and decreased in 12.9%, 76.2% and 10.9% respectively. The IGF-1 levels in 256 patients with EH were increased following the increase of blood pressure. Conclusion: Typing of EH patients with PRA and Ang II as well as the determination of IGF-1 were useful in treating and following up the patients with EH. (authors)

  18. The 25 kDa subunit of cleavage factor Im Is a RNA-binding protein that interacts with the poly(A polymerase in Entamoeba histolytica.

    Directory of Open Access Journals (Sweden)

    Marisol Pezet-Valdez

    Full Text Available In eukaryotes, polyadenylation of pre-mRNA 3' end is essential for mRNA export, stability and translation. Taking advantage of the knowledge of genomic sequences of Entamoeba histolytica, the protozoan responsible for human amoebiasis, we previously reported the putative polyadenylation machinery of this parasite. Here, we focused on the predicted protein that has the molecular features of the 25 kDa subunit of the Cleavage Factor Im (CFIm25 from other organisms, including the Nudix (nucleoside diphosphate linked to another moiety X domain, as well as the RNA binding domain and the PAP/PAB interacting region. The recombinant EhCFIm25 protein (rEhCFIm25 was expressed in bacteria and used to generate specific antibodies in rabbit. Subcellular localization assays showed the presence of the endogenous protein in nuclear and cytoplasmic fractions. In RNA electrophoretic mobility shift assays, rEhCFIm25 was able to form specific RNA-protein complexes with the EhPgp5 mRNA 3´ UTR used as probe. In addition, Pull-Down and LC/ESI-MS/MS tandem mass spectrometry assays evidenced that the putative EhCFIm25 was able to interact with the poly(A polymerase (EhPAP that is responsible for the synthesis of the poly(A tail in other eukaryotic cells. By Far-Western experiments, we confirmed the interaction between the putative EhCFIm25 and EhPAP in E. histolytica. Taken altogether, our results showed that the putative EhCFIm25 is a conserved RNA binding protein that interacts with the poly(A polymerase, another member of the pre-mRNA 3' end processing machinery in this protozoan parasite.

  19. Quality of Heliconia psittacorum seedlings grown on different substrates

    Directory of Open Access Journals (Sweden)

    Raimundo Luiz Laurinho dos Santos

    2016-01-01

    Full Text Available The production of good seedlings depends on the quality of the matrix and propagation techniques used. In choosing a substrate should be particularly observed physical and chemical characteristics. The objective of this study was to assess the development and vigor of heliconia seedlings from Heliconia psittacorum species, grown on different substrates and mixtures. The materials that form the treatments were: burnt rice husk (RHB, vermiculite (VC, sugarcane waste burnt (SWB, subsoil (S, chicken bedding (CB, cattle manure (CM, earthworm humus (EH, coconut husk powder (CSP and Horticultural Plantmax (HP. The treatments chosen were: 1( ⅔ CM + ⅓ CSP, 2( ⅔CM + ⅓RHB, 3( ⅔CB + ⅓ SWB, 4(CSP, 5(½VC+ ½SWB, 6(⅔ S + ⅓ CB, 7(⅓CM + ⅔SWB, 8(⅔ CM + ⅓SWB, 9(⅔CB + ⅓RHB, 10(⅓CM + ⅔RHB, 11(⅓CB + ⅔SWB, 12(⅔CB + ⅓CSP, 13(⅔EH + ⅓CSP, 14(⅔EH + ⅓SWB, 15(⅓CB + ⅔RHB, 16(⅓EH + ⅔SWB, 17(⅔EH + ⅓RHB, 18( ½VC + ½RHB, 19(S, 20(⅔ S + ⅓ CM, 21(⅔ S + ⅓ EH, 22(EH, 23(HP, 24(⅓EH + ⅔RHB. Samples of all treatment compositions were taken and carried out chemical and physical analysis. A set of ten treatments (1, 2, 5, 7, 8, 10, 14, 16, 20 and 22 basically consisting of CM EH, RHB, CSP and SWB produced the best seedlings and treatment with CB as a main component or not produced the worst seedlings due to high electrical conductivity

  20. [A protective effect of GLY272SER polymorphism of GNB3 gene in development of essential hypertension and its relations with environmental hypertension risk factors].

    Science.gov (United States)

    Polonikov, A V; Solodilova, M A; Ivanov, V P; Shestakov, A M; Ushachev, D V; Vialykh, E K; Vasil'eva, O V; Poliakova, N V; Antsupov, V V; Kabanina, V A; Kupriianova, Ia S; Bulgakova, I V; Kozhukhov, M A; Tevs, D S

    2011-01-01

    To study associations of C825T (rs5443) and G272S (rs16932941) polymorphisms of GNB3 gene in Russian population of the Central Chernozem region with essential hypertension (EH) risk; to elicit the role of environmental risk factors in realization of EH predisposition in this gene genotypes carriers. We studied DNA samples obtained from 205 EH patients and 207 healthy individuals. EH patients were treated in Kursk hospitals. Genotyping of GNB3 gene polymorphisms was conducted by polymerase chain reaction and restriction analysis. Prevalence of 82ST allele of GNB3 gene in EH patients and healthy individual was 0.334 and 0.295, respectively, of 272S allele--0.037 and 0.058, respectively. We found no significant differences by prevalence of genotypes of gene GNB3 polymorphisms C825T and G272S in EH patients and healthy individuals. Non-smoking carriers of 272GS genotype had a low risk of EH (OR 0.42 in 95% CI from 0.18 to 0.97; p = 0.04). Smokers had no protective effect of this genotype. The protective effect of 272GS genotype was also found in individuals with low or moderate alcohol drinking habits (OR 0.29 in 95% CI from 0.11 to 0.77, p = 0.02) and in individuals without chronic exposure to stress (OR 0.29 in 95% CI from 0.09 to 0.91, p = 0.04). In contrast, hard drinkers and patients exposed to chronic stress had no protective effect of heterozygous genotype 272GS of gene GNB3. G272S polymorphism of GNB3 gene can be considered as a new genetic marker of predisposition to EH. The protective effect depends of environmental factors associated with high risk to develop EH.

  1. The dilemma of "to be or not to be": developing electronically e-health & cloud computing documents for overseas transplant patients from Taiwan organ transplant health professionals' perspective.

    Science.gov (United States)

    Shih, F-J; Fan, Y-W; Chiu, C-M; Shih, F-Ji; Wang, S-S

    2012-05-01

    The development of mutually accessible e-health documents (ehD) and cloud computing (CC) for overseas organ transplant health professionals (OTHP) in two medical parties (domestic and overseas) would ensure better quality of care. This project attempted to compare pro and con arguments from the perspective of Taiwan's OTHP. A sample was obtained from three leading medical centers in Taiwan. Eighty subjects including transplant surgeons (n = 20), registered nurses (RN; n = 30), coordinating nurses (OTCN; n = 15), and e-health information and communication technologies experts (ehICTs; n = 15) participated in this research. The pros of developing ehD were: (1) better and continuous care through communication and cooperation in two parties (78%); (2) better collaborative efforts between health professionals, information technology experts in two medical parties is (74%); (3) easier retrieval and communication of personal health documents with the trustworthy OTHP in the different countries (71%); and (4) CC may help develop transplant patients medical cloud based on the collaboration between medical systems in political parties of Taiwan and mainland China (69%). The cons of developing ehD and CC included: (1) inadequate knowledge of benefits and manuals of developing ehD and CC (75%); (2) no reliable communication avenues in developing ehD and CC (73%); (3) increased workload in direct care and documentation in developing new ehD and CC (70%); (4) lack of coaching and accreditation systems in medical, electronic, and law aspects to settle discrepancies in medical diagnosis and treatment protocols between two parties (68%); and (5) lacking systematic ehD and CC plans developed by interdisciplinary teams in two parties (60%). In this initial phase, the establishment of an interdisciplinary team including transplant leaders, transplant surgeon, RN, OTCN, ehICTs, and law experts from two parties might be helpful in working out developing plans with careful monitoring

  2. Bayesian modeling approach for characterizing groundwater arsenic contamination in the Mekong River basin.

    Science.gov (United States)

    Cha, YoonKyung; Kim, Young Mo; Choi, Jae-Woo; Sthiannopkao, Suthipong; Cho, Kyung Hwa

    2016-01-01

    In the Mekong River basin, groundwater from tube-wells is a major drinking water source. However, arsenic (As) contamination in groundwater resources has become a critical issue in the watershed. In this study, As species such as total As (AsTOT), As(III), and As(V), were monitored across the watershed to investigate their characteristics and inter-relationships with water quality parameters, including pH and redox potential (Eh). The data illustrated a dramatic change in the relationship between AsTOT and Eh over a specific Eh range, suggesting the importance of Eh in predicting AsTOT. Thus, a Bayesian change-point model was developed to predict AsTOT concentrations based on Eh and pH, to determine changes in the AsTOT-Eh relationship. The model captured the Eh change-point (∼-100±15mV), which was compatible with the data. Importantly, the inclusion of this change-point in the model resulted in improved model fit and prediction accuracy; AsTOT concentrations were strongly negatively related to Eh values higher than the change-point. The process underlying this relationship was subsequently posited to be the reductive dissolution of mineral oxides and As release. Overall, AsTOT showed a weak positive relationship with Eh at a lower range, similar to those commonly observed in the Mekong River basin delta. It is expected that these results would serve as a guide for establishing public health strategies in the Mekong River Basin. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. Elements including metals in the atomizer and aerosol of disposable electronic cigarettes and electronic hookahs.

    Directory of Open Access Journals (Sweden)

    Monique Williams

    Full Text Available Our purpose was to quantify 36 inorganic chemical elements in aerosols from disposable electronic cigarettes (ECs and electronic hookahs (EHs, examine the effect of puffing topography on elements in aerosols, and identify the source of the elements.Thirty-six inorganic chemical elements and their concentrations in EC/EH aerosols were determined using inductively coupled plasma optical emission spectroscopy, and their source was identified by analyzing disassembled atomizers using scanning electron microscopy and energy dispersive X-ray spectroscopy.Of 36 elements screened, 35 were detected in EC/EH aerosols, while only 15 were detected in conventional tobacco smoke. Some elements/metals were present in significantly higher concentrations in EC/EH aerosol than in cigarette smoke. Concentrations of particular elements/metals within EC/EH brands were sometimes variable. Aerosols generated at low and high air-flow rates produced the same pattern of elements, although the total element concentration decreased at the higher air flow rate. The relative amount of elements in the first and last 60 puffs was generally different. Silicon was the dominant element in aerosols from all EC/EH brands and in cigarette smoke. The elements appeared to come from the filament (nickel, chromium, thick wire (copper coated with silver, brass clamp (copper, zinc, solder joints (tin, lead, and wick and sheath (silicon, oxygen, calcium, magnesium, aluminum. Lead was identified in the solder and aerosol of two brands of EHs (up to 0.165 μg/10 puffs.These data show that EC/EH aerosols contain a mixture of elements, including heavy metals, with concentrations often significantly higher than in conventional cigarette smoke. While the health effects of inhaling mixtures of heated metals is currently not known, these data will be valuable in future risk assessments involving EC/EH elements/metals.

  4. Review and assessments of potential environmental, health and safety impacts of MHD technology. Final draft

    Energy Technology Data Exchange (ETDEWEB)

    1978-01-01

    The purpose of this document is to develop an environmental, health and safety (EH and S) assessment and begin a site - specific assessment of these and socio - economic impacts for the magnetohydrodynamics program of the United States Department of Energy. This assessment includes detailed scientific and technical information on the specific EH and S issues mentioned in the MHD Environmental Development Plan. A review of current literature on impact-related subjects is also included. This document addresses the coal-fired, open-cycle MHD technology and reviews and assesses potential EH and S impacts resulting from operation of commercially-installed technology.

  5. Efecto del potencial rédox sobre los parámetros del cultivo de Trypanosoma cruzi desarrollado en medio líquido agitado Effect of redox potential on culture parameters of Trypanosoma cruzi developed in liquid stirred media.

    Directory of Open Access Journals (Sweden)

    R.A. Martínez

    2005-12-01

    Full Text Available El potencial rédox (Eh es una propiedad fisicoquímica que presentan los solutos capaces de intercambiar electrones con un electrodo inerte. El potencial rédox influye en el crecimiento bacteriano en forma independiente del oxígeno disuelto. Es escasa la información disponible en relación a cultivos in vitro de protozoarios, en particular de Trypanosoma cruzi. Para determinar el efecto del Eh sobre los parámetros de cultivos, se empleó la cepa Tulahuén 0, desarrollada en medio CIEN líquido en agitación y se ensayaron valores de Eh entre 310 mV (testigo y 110 mV en 11 réplicas diferentes y duplicadas. Se determinaron pH, velocidad específica de desarrollo (µ, Eh, rH, velocidad de consumo de glucosa y rendimiento. Los resultados muestran que µ varía en forma directa con el Eh. Se establece una alta correlación (r = 0,93; P The redox potential (Eh is a physico-chemical property presented by solutes able to interchange electrons with an inert electrode. The redox potential influences bacterial growth in an independent way from dissolved oxygen. The available information about protozoaries in vitro grown is scarce, being Trypanosoma cruzi main example. T. cruzi Tulahuén 0 strain, developed in CIEN liquid stirred media, was used to determine the Eh effect on growth parameters. Eh values between 310 mV (reference and 110 mV were measured in 11 different samples and by duplicate. pH, m, Eh, rH, consume glucose rate and efficiency were determined. Results show that specific rate of development (µ varies in a direct way with Eh. A high correlation (r = 0.93; P < 0.01 between rH (rH = Eh(V+ 0.06 pH and µ was established, even when dissolved oxygen concentration remained constant. Other parameters in the growing medium showed no significant variations. It is concluded that changes on Eh in the medium significantly affect of T. cruzi's growth being a variable to take into account when potential trypanocide substances are analyzed.

  6. Draft genome sequence of the Coccolithovirus Emiliania huxleyi virus 203.

    Science.gov (United States)

    Nissimov, Jozef I; Worthy, Charlotte A; Rooks, Paul; Napier, Johnathan A; Kimmance, Susan A; Henn, Matthew R; Ogata, Hiroyuki; Allen, Michael J

    2011-12-01

    The Coccolithoviridae are a recently discovered group of viruses that infect the marine coccolithophorid Emiliania huxleyi. Emiliania huxleyi virus 203 (EhV-203) has a 160- to 180-nm-diameter icosahedral structure and a genome of approximately 400 kbp, consisting of 464 coding sequences (CDSs). Here we describe the genomic features of EhV-203 together with a draft genome sequence and its annotation, highlighting the homology and heterogeneity of this genome in comparison with the EhV-86 reference genome.

  7. Preliminary considerations concerning actinide solubilities

    International Nuclear Information System (INIS)

    Newton, T.W.; Bayhurst, B.P.; Daniels, W.R.; Erdal, B.R.; Ogard, A.E.

    1980-01-01

    Work at the Los Alamos Scientific Laboratory on the fundamental solution chemistry of the actinides has thus far been confined to preliminary considerations of the problems involved in developing an understanding of the precipitation and dissolution behavior of actinide compounds under environmental conditions. Attempts have been made to calculate solubility as a function of Eh and pH using the appropriate thermodynamic data; results have been presented in terms of contour maps showing lines of constant solubility as a function of Eh and pH. Possible methods of control of the redox potential of rock-groundwater systems by the use of Eh buffers (redox couples) is presented

  8. Environmental factors exert strong control over the climate-growth relationships of Picea abies in Central Europe

    Czech Academy of Sciences Publication Activity Database

    Altman, Jan; Fibich, Pavel; Šantrůčková, H.; Doležal, Jiří; Štěpánek, Petr; Kopáček, Jiří; Hůnová, I.; Oulehle, F.; Tumajer, J.; Cienciala, E.

    2017-01-01

    Roč. 609, 31 December 2017 (2017), s. 506-516 ISSN 0048-9697 R&D Projects: GA ČR(CZ) GA14-12262S; GA ČR(CZ) GA17-07378S Institutional support: RVO:67985939 ; RVO:67179843 ; RVO:60077344 Keywords : Tree rings * Air pollution * Climate change Subject RIV: EH - Ecology, Behaviour; EH - Ecology, Behaviour (UEK-B); EH - Ecology, Behaviour (BC-A) OBOR OECD: Ecology; Environmental sciences (social aspects to be 5.7) (BC-A); Ecology (UEK-B) Impact factor: 4.900, year: 2016

  9. Playing with Daddy: Social Toy Play, Early Head Start, and Developmental Outcomes

    OpenAIRE

    Roggman, Lori A.; Boyce, Lisa; Cook, G. A.; Christiansen, K.; Jones, D.

    2007-01-01

    Research on fathers in Early Head Start (EHS) has provided an opportunity to study fathers from low-income families. We examined father-toddler social toy play in relation to EHS enrollment, fathers' psychosocial well-being, and children's developmental outcomes in a sample of 74 father-toddler dyads. Overall, our results show that father-toddler social toy play was more complex among fathers in an EHS program than among those in a comparison group. Greater complexity in father-toddler social...

  10. Excavating wide inclines in weak strata

    Energy Technology Data Exchange (ETDEWEB)

    Kuznetsov, N N [Ukrspetsstroiproekt (USSR)

    1990-09-01

    Discusses schemes for excavation of transport inclines in surface mines under conditions of weak, unstable rocks characterized by a high water content. The schemes are aimed at maximum reduction of excavation operations without infringing the safety of personnel. Use of walking draglines (the EhSh-20/90, EhSh-100/100 and EhSh-10/70) is evaluated. Optimum schemes for incline excavation and determining optimum slope inclination are described on the example of the Berezovsk brown coal surface mine in the USSR. Efficiency of optimum schemes is analyzed: range of excavation, safety degree, landslide hazards, water influx rate, accident rate, etc.

  11. Electromagnetic hypersensitivity: The opinion of an observer neurologist

    Science.gov (United States)

    Marc-Vergnes, Jean-Pierre

    2010-11-01

    Electromagnetic hypersensitivity (EHS) is a recent, uncertain and somehow confusing concept. It is now widely agreed that people claiming to be EHS really experience symptoms. However, no evidence for a causal link between the symptoms and electromagnetic fields (EMF) has been reported. Thus, we have to wonder whether EHS constitutes truly a relevant entity. Most of the previous studies suffer from methodological flaws. Owing to the quantification of symptoms, the interdisciplinary assessment of patients, and the use of personal exposimeters, the recent studies are of better quality. A set of convergent associated signs suggests that individual neuropsychic factors take a prominent, but maybe not unique, part in this condition.

  12. [EVALUATION OF ARTERIAL STIFFNESS AND POSSIBILITY TO PREDICT CAROTID ATHEROSCLEROSIS IN PATIENTS WITH ESSENTIAL HYPERTENSION BASED ON AN OUTPATIENT FACILITY].

    Science.gov (United States)

    Polipanov, A G; Mamasaidov, Zh A; Geleskhanova, Yu N; Cheskidova, N B; Romanova, T A; Dzhumagulova, A S

    2016-01-01

    To estimate the possibility of predicting the presence and severity of coronary atherosclerosis from arterial stiffness characteristics and augmentation index (AIx) in patients with essential hypertension (EH) obtained under outpatient conditions. The general clinical examination of 15 patients aged 30-70 yr with EH was supplemented by measuring blood glucose and creatinine levels, the lipid status (LWLP, HDLP, TG), duplex scanning of carotid arteries, and evaluation of arterial stiffness by pulsed wave contour analysis. AIx and age were independent risk factors of coronary atherosclerosis in patients with EH and severity of its manifestations. AIx values over 25% were with high specificity (over 85%) associated with atherosclerotic lesions.

  13. High power CO2 lasers and their applications in nuclear industry

    International Nuclear Information System (INIS)

    Nath, A.K.

    2002-01-01

    Carbon dioxide laser is one of the most popular lasers in industry for material processing applications. It has very high power capability and high efficiency, can be operated in continuous wave (CW), modulated and pulsed modes, and has relatively low cost. Due to these characteristics high power CO 2 lasers are being used worldwide in different industries for a wide variety of materials processing operations. In nuclear industry, CO 2 laser has made its way in many applications. Some of the tasks performed by multikilowatt CO 2 laser are cutting operations necessary to remove unprocessible hardware from reactor fuel assemblies, sealing/fixing/removing radioactive contaminations onto/from concrete surfaces and surface modification of engineering components for improved surface mechanical and metallurgical characteristics. We have developed various models of CW CO 2 lasers of power up to 12 kW and a high repetitive rate TEA (Transversely Excited Atmospheric pressure) CO 2 laser of 500 W average power operating at 500 Hz repetition rates. We have carried many materials processing applications of direct relevance to DAE. Recent work includes laser welding of end plug PFBR fuel tubes, martensitic stainless steel and titanium alloy, surface cladding of turbine blades made of Ni-super alloy with stellite 694, fabrication on graded material of stainless steel and stellite, and laser scabbling, drilling and cutting of concrete which have potential application in decontamination and decommissioning of nuclear facilities. A brief overview of these indigenous developments will be presented. (author)

  14. Possible options for reducing occupational dose from the TMI-2 basement

    International Nuclear Information System (INIS)

    Munson, L.F.; Harty, R.

    1985-11-01

    The major sources of exposure in the basement include the enclosed stairwell/elevator shaft structure, water and sludge in the elevator shaft, cast concrete walls, concrete floor slab, water and sludge on the floor, and activity in the paint and loose surface contamination. The sources were identified using data obtained by the utility from water processing, water and solid samples, remote video inspections and radiation monitoring with a robot, and strings of thermoluminescent dosimeters lowered from upper elevations. The area dose rates in the basement range from approximately 4 R/hr (in the NE quadrant) to over 1100 R/hr (near the enclosed stairwell/elevator shaft structure). It is estimated that the basement contains between 11,000 and 21,000 curies of 137 Cs. Specific decontamination and cleanup techniques are discussed. These techniques include flushing with water, high-pressure water blasting, leaching, scabbling and chemical cleaning. The applicability of these techniques to the major sources of radiation are discussed, and possible approaches and work sequences for basement cleanup are given

  15. The management routes for materials produced by the dismantling of the BR3-PWR reactor

    International Nuclear Information System (INIS)

    Klein, M.; Demeulemeester, Y.; Ponnet, M.; Emond, M.; Emond, O.; Dadoumont, J.; Massaut, V.

    2000-01-01

    The dismantling of the BR3 reactor produces quite large masses of contaminated materials, mainly metals or concrete. The main management routes are: conditioning of the radioactive wastes and disposal, recycling of radioactive materials in the nuclear sector and the recycling of free released materials in the industrial sector or their evacuation as industrial waste. The conditioning of the radioactive wastes is essentially performed in the installations of Belgoprocess and must follow the specifications imposed by the national radwaste management agency ONDRAF/NIRAS. The conditioning of the pieces produced during the cutting of the reactor pressure vessel is given as example. The recycling of radioactive materials in the nuclear sector is possible for metals and for concrete. For metals, SCK.CEN has an agreement with a nuclear foundry which reuses these materials for the fabrication of shieldings. For concrete, an R and D programme is going on with the objective to demonstrate the possible reuse of baryte concrete as raw materials for the production of mortar used in the conditioning of radioactive wastes. The free release of radioactive materials and their reuse or evacuation as radioactive wastes requires the strict respect of procedures and the use of low level measurement techniques. Various decontamination techniques are used at SCK.CEN to reach this objective. For the metals, we use mainly simple washing, abrasive decontamination and hard chemical decontamination. For concrete, we use mainly scabbling or shaving techniques. (authors)

  16. DECONTAMINATION TECHNOLOGIES FOR FACILITY REUSE

    International Nuclear Information System (INIS)

    Bossart, Steven J.; Blair, Danielle M.

    2003-01-01

    As nuclear research and production facilities across the U.S. Department of Energy (DOE) nuclear weapons complex are slated for deactivation and decommissioning (D and D), there is a need to decontaminate some facilities for reuse for another mission or continued use for the same mission. Improved technologies available in the commercial sector and tested by the DOE can help solve the DOE's decontamination problems. Decontamination technologies include mechanical methods, such as shaving, scabbling, and blasting; application of chemicals; biological methods; and electrochemical techniques. Materials to be decontaminated are primarily concrete or metal. Concrete materials include walls, floors, ceilings, bio-shields, and fuel pools. Metallic materials include structural steel, valves, pipes, gloveboxes, reactors, and other equipment. Porous materials such as concrete can be contaminated throughout their structure, although contamination in concrete normally resides in the top quarter-inch below the surface. Metals are normally only contaminated on the surface. Contamination includes a variety of alpha, beta, and gamma-emitting radionuclides and can sometimes include heavy metals and organic contamination regulated by the Resource Conservation and Recovery Act (RCRA). This paper describes several advanced mechanical, chemical, and other methods to decontaminate structures, equipment, and materials

  17. Solving decontaminable flooring problems

    International Nuclear Information System (INIS)

    Anon.

    1989-01-01

    Pennsylvania Power and Light wanted to cover deteriorating concrete in unit 2 of its Susquehanna BWR with a smooth, durable, decontaminable coating. Traditionally, floors in the plant had been coated with epoxy paint, but many of these floors suffered delamination, and failed in three to five years. Painting with epoxy would also interrupt operations for as much as three days while the floor dried, yet critical instruments in some areas had to be monitored at least once per shift. In addition, conventional floor surface preparation produced dust and vibration around sensitive equipment. The solution was a dustless scabbling system for surface preparation, followed by the installation of a high-strength acrylic industrial floor known as Silakal. The work was carried out by Pentek. Silikal bonds to the underlying concrete, so that delamination of the floor will not occur even under severe traffic conditions. Another advantage of this type of flooring is that it cures in one hour, so floor resurfacing has only minimal impact on plant operations. (author)

  18. Bell's Palsy (For Kids)

    Science.gov (United States)

    ... palsy was named after a Scottish doctor, Sir Charles Bell, who studied the two facial nerves that ... who focuses on how the nervous system works — will do a test called electromyography (say: eh-lek- ...

  19. Kvalitní potravní nabídka: prevence mladých porostů před okusem velkých herbivorů v oblasti NPP Kněhyně

    Czech Academy of Sciences Publication Activity Database

    Homolka, Miloslav; Heroldová, Marta

    2006-01-01

    Roč. 19, - (2006), s. 185-188. ISBN 80-7157-966-1 Institutional research plan: CEZ:AV0Z60930519 Keywords : impact on vegetation * large herbivores * mountain forest Subject RIV: EH - Ecology, Behaviour

  20. electro-hypersensitivity: survey among general practitioners, occupational physicians and hygienist from the Netherlands

    International Nuclear Information System (INIS)

    Bonnet-Belfais, Monique; Salines, Georges

    2017-01-01

    From October 2013 through January 2014, Dutch and Swiss researchers conducted a survey in the Netherlands on electro-hypersensitive (EHS) people among the health care providers likely to be consulted for primary care and prevention. (author)

  1. Integrative redescription of a common Arctic water bear Pilatobius recamieri (Richters, 1911)

    Czech Academy of Sciences Publication Activity Database

    Gasiorek, P.; Zawierucha, Krzystof; Stec, D.; Michalczyk, L.

    2017-01-01

    Roč. 40, č. 11 (2017), s. 2239-2252 ISSN 0722-4060 Institutional support: RVO:67985904 Keywords : biodiversity * hypsibiidae * microfauna Subject RIV: EH - Ecology, Behaviour OBOR OECD: Ecology Impact factor: 1.949, year: 2016

  2. Wheat Induced Resistance to Powdery Mildew (Blumeria graminis f. sp. tritici) by Means of Biological Preparations

    Czech Academy of Sciences Publication Activity Database

    Věchet, L.; Vrchotová, Naděžda; Hanazalová, J.

    2012-01-01

    Roč. 15, SI (2012), s. 61-62 ISSN 1335-258X Institutional support: RVO:67179843 Keywords : wheat * powdery mildew * inducers of plant origin * inducers of chemical origin Subject RIV: EH - Ecology, Behaviour

  3. Functional responses of plant communities to management, landscape and historical factors in semi-natural grasslands

    Czech Academy of Sciences Publication Activity Database

    Vandewalle, M.; Pursche, O.; de Bello, Francesco; Reitalu, T.; Prentice, H. C.; Lavorel, S.; Johansson, L. J.; Sykes, M. T.

    2014-01-01

    Roč. 25, č. 3 (2014), s. 750-759 ISSN 1100-9233 Institutional support: RVO:67985939 Keywords : biodiversity loss * grazing management * landscape history Subject RIV: EH - Ecology, Behaviour Impact factor: 3.709, year: 2014

  4. Interwell Radiative Recombination in the Presence of Random Potential Fluctuations in GaAs/AlGaAs Biased Double Quantum Wells

    DEFF Research Database (Denmark)

    Timofeev, V.B.; Larionov, A.V.; Ioselevich, A.S.

    1999-01-01

    The interwell luminescence (PL) of spatially separated e-h pairs exhibits systematic narrowing with temperature increase which are explained in terms of lateral thermo-activated tunneling of e-h pairs localized by random potential fluctuations (RPF). At critical temperatures the quasi-equilibrium......The interwell luminescence (PL) of spatially separated e-h pairs exhibits systematic narrowing with temperature increase which are explained in terms of lateral thermo-activated tunneling of e-h pairs localized by random potential fluctuations (RPF). At critical temperatures the quasi......-equilibrium of carriers, undergoes an abrupt transition. This occurs with significant redistribution of the electrical field inside the structure and give rise to a low frequency noice appearing in the luminescence. Below critical temperature the new steady state results in the accumulation of 2DEG in one of the well....

  5. Within-community environmental variability drives trait variability in species-rich grasslands

    Czech Academy of Sciences Publication Activity Database

    Price, A.; Tamme, R.; Gazol, A.; de Bello, Francesco; Takkis, K.; Uria- Diez, J.; Kasari, L.; Pärtel, M.

    2017-01-01

    Roč. 28, č. 2 (2017), s. 303-312 ISSN 1100-9233 Institutional support: RVO:67985939 Keywords : Convergence * Divergence * Functional diversity Subject RIV: EH - Ecology, Behaviour OBOR OECD: Ecology Impact factor: 2.924, year: 2016

  6. Effect of soil moisture on root-associated fungal communities of Erica dominans in Drakensberg mountains in South Africa

    Czech Academy of Sciences Publication Activity Database

    Kohout, Petr; Tedersoo, L.

    2017-01-01

    Roč. 27, č. 4 (2017), s. 397-406 ISSN 0940-6360 Institutional support: RVO:67985939 Keywords : mycorrhiza * ecology * fungi Subject RIV: EH - Ecology, Behaviour OBOR OECD: Ecology Impact factor: 3.047, year: 2016

  7. The Biomonitoring project – monitoring of forest ecosystems in non-intervention areas of the Šumava National Park

    Czech Academy of Sciences Publication Activity Database

    Zenáhlíková, J.; Červenka, J.; Čížková, P.; Bečka, P.; Starý, M.; Marek, P.; Křenová, Zdeňka; Svoboda, M.

    2015-01-01

    Roč. 21, č. 1 (2015), s. 95-104 ISSN 1211-7420 Institutional support: RVO:67179843 Keywords : Bohemian forest * forest inventory * dead wood * natural regeneration * Norway spruce Subject RIV: EH - Ecology, Behaviour

  8. Diversity and distribution of Tardigrada in Arctic cryoconite holes

    Czech Academy of Sciences Publication Activity Database

    Zawierucha, K.; Ostrowska, M.; Vonnahme, T.R.; Devetter, Miloslav; Nawrot, A.P.; Lehmann, S.; Kolicka, M.

    2016-01-01

    Roč. 75, č. 3 (2016), s. 545-559 ISSN 1129-5767 Institutional support: RVO:60077344 Keywords : Buchanbreen * Hansbreen * glacial biome * Svalbard * Tardigrada * unique species Subject RIV: EH - Ecology, Behaviour Impact factor: 1.451, year: 2016

  9. Assessment of cyanoprokaryote blooms and of cyanotoxins in Bulgaria in a 15-years period (2000-2015)

    Czech Academy of Sciences Publication Activity Database

    Stoyneva-Gärtner, M.; Descy, J.-P.; Latli, A.; Uzunov, B. A.; Pavlova, V. T.; Bratanova, Z.; Babica, Pavel; Maršálek, Blahoslav; Meriluoto, J.; Spoof, L.

    2017-01-01

    Roč. 8, č. 1 (2017), s. 131-152 ISSN 1947-573X Institutional support: RVO:67985939 Keywords : microcystins * cyanobacteria * Bulgaria Subject RIV: EH - Ecology, Behaviour OBOR OECD: Marine biology, freshwater biology, limnology

  10. Manor gardens: Harbors of local natural habitats?

    Czech Academy of Sciences Publication Activity Database

    Šantrůčková, M.; Demková, K.; Dostálek, J.; Frantík, Tomáš

    2017-01-01

    Roč. 205, JAN 2017 (2017), s. 16-22 ISSN 0006-3207 Institutional support: RVO:67985939 Keywords : park * human impact * habitat network Subject RIV: EH - Ecology, Behaviour OBOR OECD: Ecology Impact factor: 4.022, year: 2016

  11. Monitoring of the restored streams in the Vltavský Luh, Šumava National Park

    Czech Academy of Sciences Publication Activity Database

    Bojková, J.; Čížková, H.; Kučerová, Andrea; Rádková, V.; Soldán, Tomáš; Svidenský, R.; Vrba, Jaroslav

    2015-01-01

    Roč. 21, č. 1 (2015), s. 73-79 ISSN 1211-7420 Institutional support: RVO:67985939 ; RVO:60077344 Keywords : restoration * macroinvertebrates * vegetation * hydrology Subject RIV: EH - Ecology, Behaviour

  12. Changes in the distribution of alien plants along roadsides in relation to adjacent land use over the course of 40 years

    Czech Academy of Sciences Publication Activity Database

    Dostálek, J.; Frantík, Tomáš; Šilarová, V.

    2016-01-01

    Roč. 150, č. 3 (2016), s. 442-448 ISSN 1126-3504 Institutional support: RVO:67985939 Keywords : adjacent land use * alien plants * roads Subject RIV: EH - Ecology, Behaviour Impact factor: 1.390, year: 2016

  13. Hydathode trichomes actively secreting water from leaves play a key role in the physiology and evolution of root-parasitic rhinanthoid Orobanchaceae

    Czech Academy of Sciences Publication Activity Database

    Světlíková, P.; Hájek, Tomáš; Těšitel, J.

    2015-01-01

    Roč. 116, č. 1 (2015), s. 61-68 ISSN 0305-7364 Institutional support: RVO:67985939 Keywords : active water transport * parasite * water regime Subject RIV: EH - Ecology, Behaviour Impact factor: 3.982, year: 2015

  14. Soil food web properties explain ecosystem services across European land use systems

    Czech Academy of Sciences Publication Activity Database

    de Vries, F.T.; Thébault, E.; Liiri, M.; Birkhofer, K.; Tsiafouli, M.A.; Bjornlund, L.; Bracht Jorgensen, H.; Brady, M.V.; Christensen, S.; de Ruiter, P.C.; d'Hertefeldt, T.; Frouz, Jan; Hedlund, K.; Hemerik, L.; Hol, W.H.G.; Hotes, S.; Mortimer, S. R.; Setälä, H.; Sgardelis, S.P.; Uteseny, K.; van der Putten, W.H.; Wolters, V.; Bardgett, R.D.

    2013-01-01

    Roč. 110, č. 35 (2013), s. 14296-14301 ISSN 0027-8424 Institutional support: RVO:60077344 Keywords : modeling * nitrogen * soil fauna * soil microbes Subject RIV: EH - Ecology, Behaviour Impact factor: 9.809, year: 2013

  15. Northern European summer temperature variations over the Common Era from integrated tree-ring density records

    Czech Academy of Sciences Publication Activity Database

    Esper, J.; Düthorn, E.; Krusic, P. J.; Timonen, M.; Büntgen, Ulf

    2014-01-01

    Roč. 29, č. 5 (2014), s. 487-494 ISSN 0267-8179 Institutional support: RVO:67179843 Keywords : dendrochronology * Finland * late holocene * Sweden * temperature reconstruction Subject RIV: EH - Ecology, Behaviour Impact factor: 3.357, year: 2014

  16. Feeding under predation risk: potential sex-specific response of perch (Perca fluviatilis).

    Czech Academy of Sciences Publication Activity Database

    Estlander, Satu; Nurminen, L.

    2014-01-01

    Roč. 23, č. 3 (2014), s. 478-480 ISSN 0906-6691 Institutional support: RVO:60077344 Keywords : foraging * sexual size dimorphism * predation * perch * pike Subject RIV: EH - Ecology, Behaviour Impact factor: 1.701, year: 2014

  17. A comparative framework for broad-scale plot-based vegetation classification

    Czech Academy of Sciences Publication Activity Database

    De Cáceres, M.; Chytrý, M.; Agrillo, E.; Attorre, F.; Botta-Dukát, Z.; Capelo, J.; Czúcz, B.; Dengler, J.; Ewald, J.; Faber-Langendoen, D.; Feoli, E.; Franklin, S. B.; Gavilán, R.; Gillet, F.; Jansen, F.; Jiménes-Alfaro, B.; Krestov, P.; Landucci, F.; Lengyel, A.; Loidi, J.; Mucina, L.; Peet, R. K.; Roberts, D. W.; Roleček, Jan; Schaminée, J.H.J.; Schmidtlein, S.; Theurillat, J. P.; Tichý, L.; Walker, D. A.; Wildi, O.; Willner, W.; Wiser, S. K.

    2015-01-01

    Roč. 18, č. 4 (2015), s. 543-560 ISSN 1402-2001 Institutional support: RVO:67985939 Keywords : vegetation classification * phytosociology * vegetation type Subject RIV: EH - Ecology, Behaviour Impact factor: 2.308, year: 2015

  18. Magnetic porous corn starch for the affinity purifi cation of cyclodextrin glucanotransferase produced by Bacillus circulans

    Czech Academy of Sciences Publication Activity Database

    Šafaříková, Miroslava; Horská, Kateřina; Maděrová, Zdeňka; Tonkova, A.; Ivanova-Pashkoulova, V.; Šafařík, Ivo

    2012-01-01

    Roč. 30, č. 1 (2012), s. 96-101 ISSN 1024-2422 Institutional support: RVO:67179843 Keywords : Bacillus circulans * cyclodextrin glucanotransferase * magnetic starch * magnetic separation Subject RIV: EH - Ecology, Behaviour Impact factor: 0.895, year: 2012

  19. Large-scale evaluation of carnivore road mortality: the effect of landscape and local scale characteristics

    Czech Academy of Sciences Publication Activity Database

    Červinka, J.; Riegert, J.; Grill, S.; Šálek, Martin

    2015-01-01

    Roč. 60, č. 3 (2015), s. 233-243 ISSN 2199-2401 Institutional support: RVO:68081766 Keywords : Carnivores * Landscape characteristics * Linear structures * Local characteristics * Road mortality * Temporal pattern Subject RIV: EH - Ecology, Behaviour

  20. Effect of an alien turtle predator on movement activity of European brown frog tadpoles

    Czech Academy of Sciences Publication Activity Database

    Berec, M.; Klapka, V.; Zemek, Rostislav

    2016-01-01

    Roč. 83, č. 1 (2016), s. 68-76 ISSN 1125-0003 Institutional support: RVO:60077344 Keywords : tadpoles * antipredator behaviour * swimming activity Subject RIV: EH - Ecology, Behaviour Impact factor: 0.921, year: 2016

  1. Method of releasing and number of animals are determinants for the success of European ground squirrel (Spermophilus citellus) reintroductions

    Czech Academy of Sciences Publication Activity Database

    Matějů, J.; Říčanová, Štěpánka; Poláková, S.; Ambros, M.; Kala, B.; Matějů, K.; Kratochvíl, L.

    2012-01-01

    Roč. 58, č. 2 (2012), s. 473-482 ISSN 1612-4642 Institutional support: RVO:68081766 Keywords : Translocation * Endangered species * Rodentia Subject RIV: EH - Ecology, Behaviour Impact factor: 1.355, year: 2012

  2. Fulltext PDF

    Indian Academy of Sciences (India)

    Basak Abhishek, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India abhishek@prl.res.in. Bastero-Gil ... Building, King's Buildings, Mayfield Road, Edinburgh EH9 3JZ, UK ab@ph.ed.ac.uk. Bhaswar .... Republic of China.

  3. Large beech (Fagus sylvatica) trees as ‘lifeboats’ for lichen diversity in central European forests

    Czech Academy of Sciences Publication Activity Database

    Hofmeister, J.; Hošek, J.; Malíček, J.; Palice, Zdeněk; Syrovátková, L.; Steinová, J.; Černajová, I.

    2016-01-01

    Roč. 25, č. 6 (2016), s. 1073-1090 ISSN 0960-3115 Institutional support: RVO:67985939 Keywords : Fagus * forest management * Red-listed species Subject RIV: EH - Ecology, Behaviour Impact factor: 2.265, year: 2016

  4. Aquatic insects of lowland rainforest in Papua New Guinea: assemblage structure in relation to habitat type

    Czech Academy of Sciences Publication Activity Database

    Klečka, Jan

    2015-01-01

    Roč. 70, č. 12 (2015), s. 1621-1630 ISSN 0006-3088 Institutional support: RVO:60077344 Keywords : community structure * biodiversity * aquatic insects Subject RIV: EH - Ecology, Behaviour Impact factor: 0.719, year: 2015

  5. Nymphal feeding habits of Perla pallida (Plecoptera: Perlidae) from Armenia

    Czech Academy of Sciences Publication Activity Database

    Manko, P.; López-Rodríguez, M. J.; Tierno de Figueroa, J. M.; Hrivniak, Ľuboš; Papyan, L.; Harutyunyan, M.; Oboňa, J.

    2016-01-01

    Roč. 71, č. 3 (2016), s. 328-333 ISSN 0006-3088 Institutional support: RVO:60077344 Keywords : Plecoptera * Perlidae * Perla pallida Subject RIV: EH - Ecology, Behaviour Impact factor: 0.759, year: 2016

  6. Population genetics of chamois in the contact zone between the Alps and the Dinaric Mountains: uncovering the role of habitat fragmentation and past management

    Czech Academy of Sciences Publication Activity Database

    Buzan, E. V.; Bryja, Josef; Zemanová, Barbora; Kryštufek, B.

    2013-01-01

    Roč. 14, č. 2 (2013), s. 401-412 ISSN 1566-0621 Institutional support: RVO:68081766 Keywords : Rupicapra rupicapra * Microsatellites * Population structure * Fragmentation * Conservation management Subject RIV: EH - Ecology, Behaviour Impact factor: 1.846, year: 2013

  7. Thermal Habitat Index of Many Northwest Atlantic Temperate Species Stays Neutral under Warming Projected for 2030 but Changes Radically by 2060

    Czech Academy of Sciences Publication Activity Database

    Shackell, N.L.; Ricard, Daniel; Stortini, C.

    2014-01-01

    Roč. 9, č. 3 (2014), e90662 E-ISSN 1932-6203 Institutional support: RVO:60077344 Keywords : climate change * environmental parameters * Atlantic Ocean * greenhouse effect Subject RIV: EH - Ecology, Behaviour Impact factor: 3.234, year: 2014

  8. Batrachochytrium dendrobatidis not found in rainforest frogs along an altitudinal gradient of Papua New Guinea

    Czech Academy of Sciences Publication Activity Database

    Dahl, C.; Kiatik, I.; Baisen, I.; Bronikowski, E.; Fleischer, R. C.; Rotzel, N. C.; Lock, J.; Novotný, Vojtěch; Narayan, E.; Hero, J.-M.

    2012-01-01

    Roč. 22, č. 3 (2012), s. 183-186 ISSN 0268-0130 Institutional support: RVO:60077344 Keywords : altitude * amphibians * Batrachochytrium dendrobatidis Subject RIV: EH - Ecology, Behaviour Impact factor: 1.081, year: 2012

  9. Global assessment of arbuscular mycorrhizal fungus diversity reveals very low endemism

    Czech Academy of Sciences Publication Activity Database

    Davison, J.; Moora, M.; Öpik, M.; Adholeya, A.; Ainsaar, L.; Bâ, A.; Burla, S.; Diedhiou, A. G.; Hiiesalu, Inga; Jairus, T.; Johnson, N. C.; Kane, A.; Koorem, K.; Kochar, M.; Ndiaye, C.; Pärtel, M.; Reier, Ü.; Saks, Ü.; Singh, R.; Vasar, M.; Zobel, M.

    2015-01-01

    Roč. 349, č. 6251 (2015), 970-973 ISSN 0036-8075 Institutional support: RVO:67985939 Keywords : arbuscular mycorrhizal fungi * 454 sequencing * diversity Subject RIV: EH - Ecology, Behaviour Impact factor: 34.661, year: 2015

  10. Are African longfin eel imports a potential pathway for parasite invasions?

    Czech Academy of Sciences Publication Activity Database

    Weyl, O.; Taraschewski, H.; Moravec, František

    2014-01-01

    Roč. 37, č. 9 (2014), s. 843-845 ISSN 0140-7775 Institutional support: RVO:60077344 Keywords : Anguilla * Anguillicola * Anguillicoloide * invasion * pathway * trade Subject RIV: EH - Ecology, Behaviour Impact factor: 2.056, year: 2014

  11. Vhledy do půdy

    Czech Academy of Sciences Publication Activity Database

    Rusek, Josef

    2008-01-01

    Roč. 56, č. 2 (2008), s. 94-96 ISSN 0044-4812 Institutional research plan: CEZ:AV0Z60660521 Keywords : soil * scanning electron microscopy * soil microsection techniques Subject RIV: EH - Ecology, Behaviour

  12. Soil fauna of peat-forming wetlands in a natural river floodplain

    Czech Academy of Sciences Publication Activity Database

    Sterzyńska, M.; Pižl, Václav; Tajovský, Karel; Stelmaszczyk, M.; Okruszko, T.

    2015-01-01

    Roč. 35, č. 4 (2015), s. 815-829 ISSN 0277-5212 Institutional support: RVO:60077344 Keywords : biodiversity * disturbance * hydrologic gradient * peatlands * riverine landscape Subject RIV: EH - Ecology, Behaviour Impact factor: 1.504, year: 2015

  13. Molecular phylogeny, population genetics, and evolution of heterocystous cyanobacteria using nifH gene sequences

    Czech Academy of Sciences Publication Activity Database

    Singh, P.; Singh, S. S.; Elster, Josef; Mishra, A. K.

    2013-01-01

    Roč. 250, č. 3 (2013), s. 751-764 ISSN 0033-183X Institutional support: RVO:67985939 Keywords : evolution * heterocystous cyanobacteria * nifH gene Subject RIV: EH - Ecology, Behaviour Impact factor: 3.171, year: 2013

  14. Evaluation of an oral health education session for Early Head Start home visitors.

    Science.gov (United States)

    Glatt, Kevin; Okunseri, Christopher; Flanagan, Diane; Simpson, Pippa; Cao, Yumei; Willis, Earnestine

    2016-06-01

    Home visiting programs promote the education and health of Early Head Start (EHS) children and pregnant women. However, EHS's oral health component is unevenly implemented. We conducted an educational intervention to improve oral health knowledge and motivational interviewing techniques among Wisconsin EHS home visitors. A questionnaire assessing oral health-related knowledge and confidence was administered to home visitors before and after an educational session. Changes between pre/post-responses were analyzed with McNemar's test and Wilcoxon Signed Rank test. After the intervention there were increases in both knowledge and confidence related to oral health communication. Knowledge increases were observed in such topics as fluoridation, dental caries, and caregivers' role in assisting and supervising children's tooth brushing. A brief educational intervention was associated with increased home visitor knowledge and confidence in communicating oral health messages to EHS caregivers and pregnant women. © 2016 American Association of Public Health Dentistry.

  15. Aplikace metod molekulární genetiky v klinické mikrobiologii: zpráva z jednání Pracovní skupiny molekulární mikrobiologie – TIDE

    Czech Academy of Sciences Publication Activity Database

    Hrabák, J.; Bunček, M.; Dendis, M.; Horváth, R.; Chroňáková, Alica; Libra, A.; Nešvera, Jan; Pantůček, R.; Piskunová, N.; Plíšková, L.; Růžička, F.; Sauer, P.; Sedláček, I.; Trubač, P.; Žampachová, E.; Žemličková, H.; Scharfen, J.

    2010-01-01

    Roč. 59, č. 3 (2010), s. 103-106 ISSN 1210-7913 Institutional research plan: CEZ:AV0Z60660521; CEZ:AV0Z50200510 Keywords : molecular microbiology * typing * identification Subject RIV: EH - Ecology, Behaviour

  16. Adaptation options for wheat in Europe will be limited by increased adverse weather events under climate change

    Czech Academy of Sciences Publication Activity Database

    Trnka, Miroslav; Hlavinka, Petr; Semenov, M. A.

    2016-01-01

    Roč. 12, č. 12 (2016), s. 1-7 ISSN 1742-5689 Institutional support: RVO:67179843 Keywords : climate change * extreme events * food security * winter wheat Subject RIV: EH - Ecology, Behaviour Impact factor: 3.579, year: 2016

  17. Preliminary investigation of microbiological effect for radioactive waste disposal system. 1. Experimental investigation of tolerance of some bacterias under alkaline and reducing condition

    International Nuclear Information System (INIS)

    Yoshikawa, Hideki; Yui, Mikazu; Mihara, Morihiro; Fukunaga, Sakae; Asano, Hidekazu.

    1995-01-01

    Activities and tolerance of some bacteria were investigated under alkaline and reducing conditions for geological disposal. A fermenter was used to control pH and Eh with a liquid culture inoculated with sulphate-reducing bacteria (SRB), methane-producing bacteria (MPB) and sulphur-oxidizing bacteria (SOB). Growth of SRB was obtained at maximum pH 8.6 (Eh -340 mV) or maximum Eh -100 mV (pH 7). Ranges of Eh for the growth of MPB and SOB were estimated to be less than -210 mV at pH8, and more than +240 mV at pH 7.5, respectively. Activity for SOB was not observed in the pH range more than 8. (author)

  18. Genetics Home Reference: 3q29 microduplication syndrome

    Science.gov (United States)

    ... Schmidt KR, Tervo R, Escobar LF, Friedrich CA, McDonald M, Campbell L, Ming JE, Zackai EH, Bejjani ... 10 All Bulletins Features What is direct-to-consumer genetic testing? What are genome editing and CRISPR- ...

  19. Genetics Home Reference: alveolar capillary dysplasia with misalignment of pulmonary veins

    Science.gov (United States)

    ... Maisenbacher MK, Bolivar J, Bauer M, Zackai EH, McDonald-McGinn D, Nowaczyk MM, Murray M, Hustead V, ... 10 All Bulletins Features What is direct-to-consumer genetic testing? What are genome editing and CRISPR- ...

  20. Genetics Home Reference: Muenke syndrome

    Science.gov (United States)

    ... Shanske AL, Jehee FS, Bueno MR, Knightly C, McDonald-McGinn D, Zackai EH, Muenke M. Muenke syndrome ( ... 10 All Bulletins Features What is direct-to-consumer genetic testing? What are genome editing and CRISPR- ...