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1

Mechatronics in Rotating Machinery  

Microsoft Academic Search

In this survey paper, we discuss the recent progress in researches on mechatronics in rotating machinery. Even before 'mechatronics' emerged as a new concept in technological advancement, much mechatronization effort has already been made in rotating machinery. Automatic balancer, for example, is a typical mechatronics product in rotating machinery that has a long history of development. When smart actuators such

Chong-Won Lee

2

Instability in Rotating Machinery  

NASA Technical Reports Server (NTRS)

The proceedings contain 45 papers on a wide range of subjects including flow generated instabilities in fluid flow machines, cracked shaft detection, case histories of instability phenomena in compressors, turbines, and pumps, vibration control in turbomachinery (including antiswirl techniques), and the simulation and estimation of destabilizing forces in rotating machines. The symposium was held to serve as an update on the understanding and control of rotating machinery instability problems.

1985-01-01

3

Rotating-Machinery Critical Speeds  

NASA Technical Reports Server (NTRS)

Computer program available from COSMIC provides quick, efficient, and accurate results in support of preliminary and proposed rotating-machinery designs. Advanced rotating-machinery design is iterative process in early stages of development. New program provides timely, critical-speed calculations to support preliminary rotating-machinery designs.

Beatty, R. F.; Mowers, A. L.; Mogil, E.

1983-01-01

4

Fault detection and diagnosis in rotating machinery  

Microsoft Academic Search

The detection and diagnosis of mechanical faults in rotating machinery using a model-based approach is studied. For certain types of faults, for example raceway faults in rolling element bearings, increase in mass unbalance and changes in stiffness and damping, algorithms suitable for real-time implementation are developed and tested

Kenneth A. Loparo; Nader Afshari; Mohammed Abdel-Magied

1998-01-01

5

Fault detection and diagnosis of rotating machinery  

Microsoft Academic Search

A model-based approach to the detection and diagnosis of mechanical faults in rotating machinery is studied in this paper. For certain types of faults, for example, raceway faults in rolling element bearings, an increase in mass unbalance, and changes in stiffness and damping, algorithms suitable for real-time implementation are developed and evaluated using computer simulation

Kenneth A. Loparo; M. L. Adams; Wei Lin; M. Farouk Abdel-Magied; Nadar Afshari

2000-01-01

6

Active Vibration Dampers For Rotating Machinery  

NASA Technical Reports Server (NTRS)

Active dampers developed to suppress vibrations in rotating machinery. Essentially feedback control systems and reciprocating piezoelectric actuators. Similar active damper containing different actuators described in LEW-14488. Concept also applicable to suppression of vibrations in stationary structures subject to winds and earthquakes. Active damper offers adjustable suppression of vibrations. Small and lightweight and responds faster to transients.

Kascack, Albert F.; Ropchock, John J.; Lakatos, Tomas F.; Montague, Gerald T.; Palazzolo, Alan; Lin, Reng Rong

1994-01-01

7

Multiphasic pump for rotating cryogenic machinery  

Microsoft Academic Search

A mixed phase pump for rapidly rotating cryogenic machinery is disclosed, preferably for installation to a superconducting generator rotor. The superconducting generator rotor includes an inner and outer rotor structure joined in a thermally insulated configuration not unlike that of a dewar flask. The inner rotor contains a support cylinder for a refrigerant, typically helium, which when refrigerated to 3.5*

Eckels

1980-01-01

8

Measurements of periodic flow in rotating machinery  

Microsoft Academic Search

A description is given of high-response instrumentation used to obtain accurate measurements of the periodic or time-dependent flow in rotating machinery. The instrumentation (pitot and multi-sensor hot film) are described with emphasis on improvements over previous systems. Data analysis procedures utilizing empirical calibrations and digitized data as inputs to a computer program are outlined. Accuracies of the techniques are established

J. C. Bennett

1977-01-01

9

An Adaptive Model of Rotating Machinery Subject to Vibration Monitoring  

Microsoft Academic Search

This paper proposes a state-space model of nonstationary multivariate vibration signals for the on-line estimation of the state of rotating machinery by means of noise-adaptive Kalman filtering algorithm and spectral analysis in the time-frequency domain. Experimental results demonstrate that the proposed model is able to quickly detect the actual state of rotating machinery even under highly nonstationary conditions with abrupt

Y. Zhan; V. Makis; A. K. S. Jardine

10

Precision optical angular position marker system for rotating machinery  

NASA Technical Reports Server (NTRS)

An optical system is described which generates one or more markers of the angular shaft position of rotating machinery. The system consists of a light source, an optical cable, a machinery mounted lens assembly, a light detector, and a signal conditioner. Light reflected by targets on the rotor is converted to a digital output signal. The system is highly immune to extreme environments of vibration and temperature and achieved a 0.002 percent precision under operational test conditions.

Barranger, J. P.

1983-01-01

11

Observer Based Critical Response Estimation In Rotating Machinery  

Microsoft Academic Search

Abstract Critical response estimation attempts to determine the synchronous forced response (displacement) of a rotor at critical points which cannot be measured directly. This type of critical response prediction capability, if accurate and reliable, has broad potential use in the rotating machinery industry. Many machines have close clearance points on their shafts, such as seals, which can easily be damaged

Christopher K. Sortore

1999-01-01

12

Web-based Interactive Simulator for Rotating Machinery.  

ERIC Educational Resources Information Center

Baroma (Balance of Rotating Machinery), the Web-based educational engineering interactive software for teaching/learning combines didactical and software ergonomical approaches. The software in tutorial form simulates a problem using Visual Interactive Simulation in graphic display, and animation is brought about through graphical user interface…

Sirohi, Vijayalaxmi

1999-01-01

13

Vibration-Based Damage Detection in Rotating Machinery  

SciTech Connect

Damage detection as determined from changes in the vibration characteristics of a system has been a popular research topic for the last thirty years. Numerous damage identification algorithms have been proposed for detecting and locating damage in structural and mechanical systems. To date, these damage-detection methods have shown mixed results. A particular application of vibration-based damage detection that has perhaps enjoyed the greatest success is that of damage detection in rotating machinery. This paper summarizes the state of technology in vibration-based damage detection applied to rotating machinery. The review interprets the damage detection process in terms of a statistical pattern recognition paradigm that encompasses all vibration-based damage detection methods and applications. The motivation for the study reported herein is to identify the reasons that vibration-based damage detection has been successfully applied to rotating machinery, but has yet to show robust applications to civil engineering infrastructure. The paper concludes by comparing and contrasting the vibration-based damage detection applied to rotating machinery with large civil engineering infrastructure applications.

Farrar, C.R.; Duffey, T.A.

1999-06-28

14

Elements of active vibration control for rotating machinery  

NASA Technical Reports Server (NTRS)

The success or failure of active vibration control is determined by the availability of suitable actuators, modeling of the entire system including all active elements, positioning of the actuators and sensors, and implementation of problem-adapted control concepts. All of these topics are outlined and their special problems are discussed in detail. Special attention is given to efficient modeling of systems, especially for considering the active elements. Finally, design methods for and the application of active vibration control on rotating machinery are demonstrated by several real applications.

Ulbrich, Heinz

1990-01-01

15

Failure Accommodation Tested in Magnetic Suspension Systems for Rotating Machinery  

NASA Technical Reports Server (NTRS)

The NASA Glenn Research Center at Lewis Field and Texas A&M University are developing techniques for accommodating certain types of failures in magnetic suspension systems used in rotating machinery. In recent years, magnetic bearings have become a viable alternative to rolling element bearings for many applications. For example, industrial machinery such as machine tool spindles and turbomolecular pumps can today be bought off the shelf with magnetically supported rotating components. Nova Gas Transmission Ltd. has large gas compressors in Canada that have been running flawlessly for years on magnetic bearings. To help mature this technology and quiet concerns over the reliability of magnetic bearings, NASA researchers have been investigating ways of making the bearing system tolerant to faults. Since the potential benefits from an oil-free, actively controlled bearing system are so attractive, research that is focused on assuring system reliability and safety is justifiable. With support from the Fast Quiet Engine program, Glenn's Structural Mechanics and Dynamics Branch is working to demonstrate fault-tolerant magnetic suspension systems targeted for aerospace engine applications. The Flywheel Energy Storage Program is also helping to fund this research.

Provenza, Andy J.

2000-01-01

16

Low Power Magnetic Bearing Design for High Speed Rotating Machinery  

NASA Technical Reports Server (NTRS)

Magnetic suspension technology has advanced to the point of being able to offer a number of advantages to a variety of applications in the rotating machinery and aerospace fields. One strong advantage is the decrease in power consumption. The design and construction of a set of permanent magnet biased, actively controlled magnetic bearing for a flexible rotor are presented. Both permanent magnets and electromagnets are used in a configuration which effectively provides the necessary fluxes in the appropriate air gaps, while simultaneously keeping the undesirable destabilizing forces to a minimum. The design includes two radial bearings and a thrust bearing. The theoretical development behind the design is briefly discussed. Experimental performance results for a set of operating prototype bearings is presented. The results include measurements of load capacity, bearing stiffness and damping, and the dynamic response of the rotor. With few exceptions, the experimental results matched very well with the predicted performance. The power consumption of these bearings was found to be significantly reduced from that for a comparable set of all electromagnetic bearings.

Allaire, P. E.; Maslen, E. H.; Humphris, R. R.; Sortore, C. K.; Studer, P. A.

1992-01-01

17

Centrifugally activated bearing for high-speed rotating machinery  

DOEpatents

A centrifugally activated bearing is disclosed. The bearing includes an annular member that extends laterally and radially from a central axis. A rotating member that rotates about the central axis relative to the annular member is also included. The rotating member has an interior chamber that surrounds the central axis and in which the annular member is suspended. Furthermore, the interior chamber has a concave shape for retaining a lubricant therein while the rotating member is at rest and for retaining a lubricant therein while the rotating member is rotating. The concave shape is such that while the rotating member is rotating a centrifugal force causes a lubricant to be forced away from the central axis to form a cylindrical surface having an axis collinear with the central axis. This centrifugally displaced lubricant provides restoring forces to counteract lateral displacement during operation.

Post, Richard F. (Walnut Creek, CA)

1994-01-01

18

Vibration measurements on rotating machinery using laser Doppler velocimetry  

Microsoft Academic Search

This paper explores the use of laser vibrometry for vibration measurement directly from a rotating component. The presence of a surface velocity component due to the rotation itself is shown to create a strong measurement dependency on vibration perpendicular to the intended measurement direction. Particular ambiguity results at synchronous frequencies. A mathematical means to resolve the genuine vibration components from

S. J. Rothberg; N. A. Halliwell

1994-01-01

19

Vibration monitoring of EDF rotating machinery using artificial neural networks  

NASA Astrophysics Data System (ADS)

Vibration monitoring of components in nuclear power plants has been used for a number of years. This technique involves the analysis of vibration data coming from vital components of the plant to detect features which reflect the operational state of machinery. The analysis leads to the identification of potential failures and their causes, and makes it possible to perform efficient preventive maintenance. Early detection is important because it can decrease the probability of catastrophic failures, reduce forced outgage, maximize utilization of available assets, increase the life of the plant, and reduce maintenance costs. This paper documents our work on the design of a vibration monitoring methodology based on neural network technology. This technology provides an attractive complement to traditional vibration analysis because of the potential of neural networks to operate in real-time mode and to handle data which may be distorted or noisy. Our efforts have been concentrated on the analysis and classification of vibration signatures collected by Electricite de France (EDF). Two neural networks algorithms were used in our project: the Recirculation algorithm and the Backpropagation algorithm. Although this project is in the early stages of development it indicates that neural networks may provide a viable methodology for monitoring and diagnostics of vibrating components. Our results are very encouraging.

Alguindigue, I. E.; Loskiewicz-Buczak, A.; Uhrig, R. E.; Hamon, L.; Lefevre, F.

20

Elman's recurrent neural network applications to condition monitoring in nuclear power plant and rotating machinery  

Microsoft Academic Search

The purpose of this study is to show the capability of recurrent neural nets (RNN) for condition monitoring and diagnosis in nuclear power plant systems and rotating machinery. In the first application, the study addresses the use of RNN for detecting anomalies introduced from the simulated power operation of a high-temperature gas cooled nuclear reactor. In the second, it is

Serhat ?eker; Emine Ayaz; Erdinç Türkcan

2003-01-01

21

ISROMAC-11 Proceedings of the International Symposium on Transport Phenomena and Dynamics of Rotating Machinery,  

E-print Network

[5], and Uzol and Camci [6] on gas turbine blade cooling applications, the use of 3D PIV technique for instantaneous and unsteady/turbulent flow events such as flows in wind turbine blades, jets, and rotor blades of Rotating Machinery, Feb.26-March 2, 2006, Honolulu, Hawaii, USA Flow around Helicopter Blade Tip Sections

Camci, Cengiz

22

Vibration analysis of rotating machinery using time–frequency analysis and wavelet techniques  

Microsoft Academic Search

Time–frequency analysis, including the wavelet transform, is one of the new and powerful tools in the important field of structural health monitoring, using vibration analysis. Commonly-used signal analysis techniques, based on spectral approaches such as the fast Fourier transform, are powerful in diagnosing a variety of vibration-related problems in rotating machinery. Although these techniques provide powerful diagnostic tools in stationary

F. Al-Badour; M. Sunar; L. Cheded

2011-01-01

23

SHIRTBUTTON-SIZED GAS TURBINES: THE ENGINEERING CHALLENGES OF MICRO HIGH SPEED ROTATING MACHINERY  

Microsoft Academic Search

MIT is developing micro-electro-mechanical systems (MEMS)-based gas turbine engines, turbogenerators, and rocket engines. Fabricated in large numbers in parallel using semicon- ductor manufacturing techniques, these engines-on-a-chip are based on micro-high speed rotating machinery with power den- sities approaching those of their more familiar, full-sized breth- ren. The micro-gas turbine is a 2 cm diameter by 3 mm thick Si or

Alan H. Epstein; Stuart A. Jacobson; Jon M. Protz; Luc G. Frechette

2000-01-01

24

The rotating machinery workstation: For implementation of a condition based maintenance workstation  

SciTech Connect

In recent years, faced with growing competition in the power generation market, many utilities have established pedictive maintenance programs at their aging fossil plants, with the goal of optimizing the value of existing plant assets by extending component life, improving unit performance, and reducing operation and maintenance (O&M) costs. In these programs, utilities base maintenance decisions on actual equipment condition, and frequently realize substantial savings by detecting incipient failure early and avoiding forced outages, deferring routine overhauls; and extending the time between planned outages. To make well-informed, condition-based O&M decisions, utility personnel need ready access to high-quality monitoring and analytic data concerning plant equipment--data that is often isolated in {open_quotes}islands{close_quotes} of computerized information. Designed for use on local- and wide-are networks, EPRI`s Rotating Machinery Workstation (RMW) software gives users access, through a single graphical user interface, to monitoring and analytic information from a virtually unlimited variety of software sources. For instance, users working in the integrated RMW software environment can readily review: maintenance histories; data collected during periodic testing, inspections and overhauls; digitized photographs used to document equipment condition; expert-system diagnoses and condition assessments of key rotating machinery. As a result, utilities can reliably anticipate what maintenance they will need to perform on rotating machinery, manage maintenance activities, and reduce O&M costs by avoiding unnecessary repair, eliminating root causes, and improving component design and operating practices.

Wong, F. [Automation Technology, Inc., San Jose, CA (United States); McCloskey, T. [EPRI, Palo Alto, CA (United States); Nowak, E. [Salt River Project, Page, AZ (United States); McQueen, S. [Houston Lighting & Power, TX (United States)

1995-12-31

25

Fault Diagnosis of Rotating Machinery Based on an Adaptive Ensemble Empirical Mode Decomposition  

PubMed Central

The vibration based signal processing technique is one of the principal tools for diagnosing faults of rotating machinery. Empirical mode decomposition (EMD), as a time-frequency analysis technique, has been widely used to process vibration signals of rotating machinery. But it has the shortcoming of mode mixing in decomposing signals. To overcome this shortcoming, ensemble empirical mode decomposition (EEMD) was proposed accordingly. EEMD is able to reduce the mode mixing to some extent. The performance of EEMD, however, depends on the parameters adopted in the EEMD algorithms. In most of the studies on EEMD, the parameters were selected artificially and subjectively. To solve the problem, a new adaptive ensemble empirical mode decomposition method is proposed in this paper. In the method, the sifting number is adaptively selected, and the amplitude of the added noise changes with the signal frequency components during the decomposition process. The simulation, the experimental and the application results demonstrate that the adaptive EEMD provides the improved results compared with the original EEMD in diagnosing rotating machinery. PMID:24351666

Lei, Yaguo; Li, Naipeng; Lin, Jing; Wang, Sizhe

2013-01-01

26

7th IFToMM-Conference on Rotor Dynamics, Vienna, Austria, 25-28 September 2006 Mechatronics in Rotating Machinery  

E-print Network

mechatronics product in rotating machinery that has a long history of development. When smart actuators to excite the rotors for parameter identification, to control the motion of the rotating shaft advancement. KEY WORDS Mechatronics, sensors and actuators, automatic balancer, active bearing, active damper

Kim, Yong Jung

27

Hidden Markov model-based fault diagnostics method in speed-up and speed-down process for rotating machinery  

NASA Astrophysics Data System (ADS)

It is very important to ensure that the large rotating machinery operates safely and reliably. The behaviour characteristics of the speed-up and speed-down process in a rotating machinery possess the distinct diagnostic value. The abundant information, non-stationarity, poor repeatability and reproducibility in the speed-up and speed-down process lead to the necessity to find the corresponding approach of feature extraction and fault recognition. The Hidden Markov model (HMM) is very suitable for modelling the dynamic time series, and has a strong capability of pattern classification, especially for a signal with abundant information, non-stationarity, poor repeatability and reproducibility. At the same time, HMM can process the random long sequences in theory. Based on these features, HMM is very suitable for the signal from the speed-up and speed-down process in rotating machinery. As a result, HMM is introduced to the fault diagnosis of rotating machinery, and a new HMM-based approach of the fault diagnosis for the speed-up and speed-down process is proposed. The main idea of the proposed approach is that the feature vectors, which are obtained by the FFT, wavelet transform, bispectrum, etc., are used as fault features, respectively, and the HMMs as the classifiers to recognise the faults of the speed-up and speed-down process in rotating machinery. The experimental results show that the proposed approach is feasible and effective.

Li, Zhinong; Wu, Zhaotong; He, Yongyong; Fulei, Chu

2005-03-01

28

The velocity synchronous discrete Fourier transform for order tracking in the field of rotating machinery  

NASA Astrophysics Data System (ADS)

Diagnostics of rotating machinery has developed significantly in the last decades, and industrial applications are spreading in different sectors. Most applications are characterized by varying velocities of the shaft and in many cases transients are the most critical to monitor. In these variable speed conditions, fault symptoms are clearer in the angular/order domains than in the common time/frequency ones. In the past, this issue was often solved by synchronously sampling data by means of phase locked circuits governing the acquisition; however, thanks to the spread of cheap and powerful microprocessors, this procedure is nowadays rarer; sampling is usually performed at constant time intervals, and the conversion to the order domain is made by means of digital signal processing techniques. In the last decades different algorithms have been proposed for the extraction of an order spectrum from a signal sampled asynchronously with respect to the shaft rotational velocity; many of them (the so called computed order tracking family) use interpolation techniques to resample the signal at constant angular increments, followed by a common discrete Fourier transform to shift from the angular domain to the order domain. A less exploited family of techniques shifts directly from the time domain to the order spectrum, by means of modified Fourier transforms. This paper proposes a new transform, named velocity synchronous discrete Fourier transform, which takes advantage of the instantaneous velocity to improve the quality of its result, reaching performances that can challenge the computed order tracking.

Borghesani, P.; Pennacchi, P.; Chatterton, S.; Ricci, R.

2014-02-01

29

Application of the largest Lyapunov exponent for the diagnosis of rotor-to-stator rub in rotating machinery  

NASA Astrophysics Data System (ADS)

Vibration based diagnosis has played a vital role in the crucial analysis of faults in rotating machinery. The conventional vibration techniques currently being used in the industry are however not able to effectively identify nonlinear or complex signals due to, for example, rotor-to-stator rub. This paper reports on the application of the largest Lyapunov Exponent ?1 to diagnose the severity of rotor-to-stator rub in rotating machinery. The method of time delay was employed to reconstruct the vibration signal obtained from numerical simulation of a Jeffcott rotor subjected to rotor-to-stator rub. Numerical results show clear correlation between the increase of rub severity with the invariant quantity ?1 investigated in this work. Two different algorithms for the computation of ?1 were employed in this research, namely the Wolf algorithm and the Rosenstein algorithm.

ChangJie, Colin Heng; Inayat-Hussain, Jawaid I.

2014-10-01

30

Rotating machinery - Transport phenomena; Proceedings of the 3rd International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC-3), Honolulu, HI, Apr. 1-4, 1990  

Microsoft Academic Search

Topics discussed in these proceedings include turbine cooling heat transfer, rotating surfaces, curved ducts and rotating channels, flow in pumps, analytical and numerical methods, design and design methods, and multiphase flow and cavitation. Papers are presented on transient heat analysis of stator in air-cooled turbine generators, numerical evaluation of single central jet for turbine disk cooling, film condensation on a

J. H. Kim; W.-J. Yang

1992-01-01

31

Early fault diagnosis of rotating machinery based on wavelet packets—Empirical mode decomposition feature extraction and neural network  

NASA Astrophysics Data System (ADS)

After analyzing the shortcomings of current feature extraction and fault diagnosis technologies, a new approach based on wavelet packet decomposition (WPD) and empirical mode decomposition (EMD) are combined to extract fault feature frequency and neural network for rotating machinery early fault diagnosis is proposed. Acquisition signals with fault frequency feature are decomposed into a series of narrow bandwidth using WPD method for de-noising, then, the intrinsic mode functions (IMFs), which usually denoted the features of corresponding frequency bandwidth can be obtained by applying EMD method. Thus, the component of IMF with signal feature can be separated from all IMFs and the energy moment of IMFs is proposed as eigenvector to effectively express the failure feature. The classical three layers BP neural network model taking the fault feature frequency as target input of neural network, the 5 spectral bandwidth energy of vibration signal spectrum as characteristic parameter, and the 10 types of representative rotor fault as output can be established to identify the fault pattern of a machine. Lastly, the fault identification model of rotating machinery with rotor lateral early crack based on BP neural network is taken as an example. The results show that the proposed method can effectively get the signal feature to diagnose the occurrence of early fault of rotating machinery.

Bin, G. F.; Gao, J. J.; Li, X. J.; Dhillon, B. S.

2012-02-01

32

Periodic and continuous vibration monitoring for Preventive/Predictive Maintenance of rotating machinery  

NASA Astrophysics Data System (ADS)

The application of vibration monitoring as part of Preventive/Predictive Maintenance programs is discussed. Several alternative methods, including periodic and continuous monitoring techniques, are described. Emphasis is given to the importance of selecting vibration transducers with due regard for the specific machinery type. The equally important need to install monitoring systems which are cost effective and provide genuinely useful information for maintenance engineers and vibration analysis is also highlighted. It is argued that critical machinery should be monitored continuously, and in cases when more detailed investigation is required that high-quality Predictive Maintenance vibration analysis techniques be applied. The need is also emphasized for specialist interpretation of vibration data in order to identify specific machinery malfunctions, of which several examples are given.

Laws, W. C.; Muszynska, A.

1987-04-01

33

Condition monitoring and classification of rotating machinery using wavelets and hidden Markov models  

Microsoft Academic Search

Condition monitoring and classification of machinery state is of great practical significance in manufacturing industry, because it provides updated information regarding machine status on-line, thus avoiding the production loss and minimising the chances of catastrophic machine failure. In this paper, the condition classification is based on hidden Markov models (HMMs) processing information obtained from vibration signals. We present an on-line

Qiang Miao; Viliam Makis

2007-01-01

34

Condition monitoring and classification of rotating machinery using wavelets and hidden Markov models  

NASA Astrophysics Data System (ADS)

Condition monitoring and classification of machinery state is of great practical significance in manufacturing industry, because it provides updated information regarding machine status on-line, thus avoiding the production loss and minimising the chances of catastrophic machine failure. In this paper, the condition classification is based on hidden Markov models (HMMs) processing information obtained from vibration signals. We present an on-line fault classification system with an adaptive model re-estimation algorithm. The machinery condition is identified by selecting the HMM which maximises the probability of a given observation sequence. The proper selection of the observation sequence is a key step in the development of an HMM-based classification system. In this paper, the classification system is validated using observation sequences based on the wavelet modulus maxima distribution obtained from real vibration signals, which has been proved to be effective in fault detection in previous research.

Miao, Qiang; Makis, Viliam

2007-02-01

35

ISROMAC-11 Proceedings of the International Symposium on Transport Phenomena and Dynamics of Rotating Machinery,  

E-print Network

;2 The current paper summarizes the findings of a Computational Fluid Dynamics (CFD) study performed wind tunnel research of aero-acoustic/structural characteristics of a scaled rotating antenna model. 2 is validated using well-established wind tunnel data for cylinder-in- cross-flow from Prandtl and Tietjens [1

Camci, Cengiz

36

A simple and reliable sensor for accurate measurement of angular speed for low speed rotating machinery  

NASA Astrophysics Data System (ADS)

This paper presents the theory and implementation of a novel sensor system for measuring the angular speed (AS) of a shaft rotating at a very low speed range, nearly zero speed. The sensor system consists mainly of an eccentric sleeve rotating with the shaft on which the angular speed to be measured, and an eddy current displacement sensor to obtain the profile of the sleeve for AS calculation. When the shaft rotates at constant speed the profile will be a pure sinusoidal trace. However, the profile will be a phase modulated signal when the shaft speed is varied. By applying a demodulating procedure, the AS can be obtained in a straightforward manner. The sensor system was validated experimentally based on a gearbox test rig and the result shows that the AS obtained are consistent with that obtained by a conventional encoder. However, the new sensor gives very smooth and stable traces of the AS, demonstrating its higher accuracy and reliability in obtaining the AS of the low speed operations with speed-up and down transients. In addition, the experiment also shows that it is easy and cost-effective to be realised in different applications such as condition monitoring and process control.

Kuosheng, Jiang; Guanghua, Xu; Tangfei, Tao; Lin, Liang; Yi, Wang; Sicong, Zhang; Ailing, Luo

2014-01-01

37

Rotor Blade Pressure Measurement in a Rotating Machinery Using Pressure and Temperature Sensitive Paints  

NASA Technical Reports Server (NTRS)

Pressure and temperature sensitive paints have been utilized for the measurement of blade surface pressure and temperature distributions in a high speed axial compressor and an Allied Signal F109 gas turbine engine. Alternate blades were painted with temperature sensitive paints and then pressure sensitive paint. This combination allows temperature distributions to be accounted for when determining the blade suction surface pressure distribution. Measurements were taken and pressure maps on the suction surface of a blade were obtained over a range of rotational speeds. Pressure maps of the suction surface show-strong shock waves at the higher speeds.

Torgerson, S.; Liu, T.; Sullivan, J.

1998-01-01

38

A parametric approach for the estimation of the instantaneous speed of rotating machinery  

NASA Astrophysics Data System (ADS)

A parametric method is proposed for the estimation of the instantaneous speed of rotating machines. The method belongs typically to the class of eigenvalue based parametric signal processing methods. The major advantage of parametric methods over frequency domain or time-frequency domain based methods, is their increased resolution and their reduced computational cost. Moreover, advantages of eigenvalue based methods over other parametric methods include their robustness to noise. Sensitivity analysis for the key parameters of the proposed method is performed, including the sampling frequency, the signal length and the robustness to noise. The effectiveness of the method is demonstrated in vibration measurements from a test rig during start-up and run-down, as well as during variations of the speed of a motorcycle engine. Compared to the Hilbert Transform and to the Discrete Energy Separation Algorithm (DESA), the proposed approach exhibits a better behavior, while it simultaneously presents computational simplicity, being able to be implemented analytically, even online.

Rodopoulos, Konstantinos; Yiakopoulos, Christos; Antoniadis, Ioannis

2014-02-01

39

Smoothing and statistical evaluation of laser Doppler velocimetry data of turbulent flows in rotating and reciprocating machinery  

NASA Astrophysics Data System (ADS)

Arbitrarily time-distributed velocity information acquired by laser Doppler velocimeter systems needs special care when evaluated wrt. the mean velocity and the components of the Reynolds stress tensor. In rotating machinery, the arrival time information can be uniquely mapped to the angular position ? of the runner blades by using encoder signals relating a fixed runner position to an arrival time. It is convenient to statistically evaluate the velocity information of the detected particles in an angular window [?0-??/2,?0+??/2] in order to obtain mean velocities and turbulence values for an angular position ?0. This approach has the inconvenience that turbulence values calculated from standard deviations are influenced by a possible variation in the mean velocity in the evaluation window. Other problems that arise with this ``evaluation window'' method are the influence of unevenly angular-distributed velocity information on the mean velocity or the poor resolution of maxima and minima of the mean velocity, which is similar to the problem pointed out by Jakoby etal. but being of second-order nature. In this paper, different improvements in the ``evaluation window'' method wrt these problems based on ideas found in a paper by McDonald and Owen are presented. A confidence interval calculation, generalizing the methods of Boutier, for all calculated values is included, which allows an appropriate window size ?? to be chosen for each particular situation. The different methods are compared using examples from wake flows of axial hydraulic turbomachinery measured in air and water.

Glas, W.; Forstner, M.; Kuhn, K.; Jaberg, H.

40

Hindered rotation and phase transition in sodium gallohydride according to the NMR data  

Microsoft Academic Search

Polycrystalline sodium gallohydrides with different hydrogen isotope compositions, NaGaH4, NaGaH2.56D1.44, and NaGaD4, were studied over the temperature range 100–375 K by the 2H, 23Na, and 69,71Ga NMR methods in magnetic fields of 1.4, 1.88, and 7.04 T. The data on spin-lattice deuteron relaxation T\\u000a 1(2H) were used to determine the activation energy (?35 kJ\\/mol) of anion rotational motions and quadrupole

V. P. Tarasov; G. A. Kirakosyan; S. I. Bakum

2007-01-01

41

The combined use of vibration, acoustic emission and oil debris on-line monitoring towards a more effective condition monitoring of rotating machinery  

NASA Astrophysics Data System (ADS)

The monitoring of progressive wear in gears using various non-destructive technologies as well as the use of advanced signal processing techniques upon the acquired recordings to the direction of more effective diagnostic schemes, is the scope of the present work. For this reason multi-hour tests were performed in healthy gears in a single-stage lab scale gearbox until they were seriously damaged. Three on-line monitoring techniques are implemented in the tests. Vibration and acoustic emission recordings in combination with data coming from oil debris monitoring (ODM) of the lubricating oil are utilized in order to assess the condition of the gears. A plethora of parameters/features were extracted from the acquired waveforms via conventional (in time and frequency domain) and non-conventional (wavelet-based) signal processing techniques. Data fusion was accomplished in the level of integration of the most representative among the extracted features from all three measurement technologies in a single data matrix. Principal component analysis (PCA) was utilized to reduce the dimensionality of the data matrix whereas independent component analysis (ICA) was further applied to identify the independent components among the data and correlate them to different damage modes of the gearbox. Finally heuristic rules based on characteristic values of the resulted independent components were set, realizing thus a health monitoring scheme for gearboxes. The integration of vibration, AE and ODM data increases the diagnostic capacity and reliability of the condition monitoring scheme concluding to very interesting results. The present work summarizes the joint efforts of two research groups towards a more reliable condition monitoring of rotating machinery and gearboxes specifically.

Loutas, T. H.; Roulias, D.; Pauly, E.; Kostopoulos, V.

2011-05-01

42

Rotational diffusion of bovine serum albumin denaturated by sodium dodecylsulfate, According to data from tryptophan fluorescence  

NASA Astrophysics Data System (ADS)

The rotational diffusion of bovine serum albumin (BSA) molecules in solutions with different concentrations of the anionic detergent sodium dodecylsulfate (SDS) at different pH values is investigated, yielding information on the denaturation of BSA under the action of SDS. It is found from the increased degree of polarization in the tryptophan fluorescence of BSA and the registered parameters for the rotational diffusion of BSA molecules that the denaturation of BSA under the action of SDS at pH values less than the isoelectric point (pI) of BSA (4-9) is a two-stage process. It is shown that the first stage of BSA denaturation common for all pH values is the decondensation of BSA globules, while the second stage of BSA denaturation at pH greater than the pI of BSA is the unfolding of the protein's amino acid chain. It is concluded that the denaturation of BSA under the action of SDS proceeds more deeply at pH values greater than the pI of BSA.

Vlasova, I. M.; Zhuravleva, V. V.; Saletskii, A. M.

2014-03-01

43

An SVM-Based Classifier for Estimating the State of Various Rotating Components in Agro-Industrial Machinery with a Vibration Signal Acquired from a Single Point on the Machine Chassis.  

PubMed

The goal of this article is to assess the feasibility of estimating the state of various rotating components in agro-industrial machinery by employing just one vibration signal acquired from a single point on the machine chassis. To do so, a Support Vector Machine (SVM)-based system is employed. Experimental tests evaluated this system by acquiring vibration data from a single point of an agricultural harvester, while varying several of its working conditions. The whole process included two major steps. Initially, the vibration data were preprocessed through twelve feature extraction algorithms, after which the Exhaustive Search method selected the most suitable features. Secondly, the SVM-based system accuracy was evaluated by using Leave-One-Out cross-validation, with the selected features as the input data. The results of this study provide evidence that (i) accurate estimation of the status of various rotating components in agro-industrial machinery is possible by processing the vibration signal acquired from a single point on the machine structure; (ii) the vibration signal can be acquired with a uniaxial accelerometer, the orientation of which does not significantly affect the classification accuracy; and, (iii) when using an SVM classifier, an 85% mean cross-validation accuracy can be reached, which only requires a maximum of seven features as its input, and no significant improvements are noted between the use of either nonlinear or linear kernels. PMID:25372618

Ruiz-Gonzalez, Ruben; Gomez-Gil, Jaime; Gomez-Gil, Francisco Javier; Martínez-Martínez, Víctor

2014-01-01

44

Heat transfer and fluid flow in rotating machinery; Proceedings of the First International Symposium on Transport Phenomena, Honolulu, HI, Apr. 28-May 3, 1985  

NASA Astrophysics Data System (ADS)

The present conference considers topics in the fields of turbine blade cooling, flow visualization and measurement, rotating tubes and heat pipes, rotating surfaces and enclosures, and turbine and compressor blades. Attention is given to film cooling in a plane turbine cascade, mist-cooling of high temperature turbines, a flow visualization of the effects of injection hole geometry, LDA measurements within a vortex boundary layer generated in a rotating drum, and the influence of internal axial fins on condensation heat transfer in coaxial rotating heat pipes. Also discussed are heat transfer for flow through simulated labyrinth seals, the cooling of superconducting generators by liquid helium, developing turbulent flow in a square duct, generalized transient rotor thermal stress, waves in rotating liquid films, and flow field determinations at axial pump impeller tip sections.

Yang, Wen-Jei

45

Balancing of high-speed machinery: Theory, methods and experimental results  

Microsoft Academic Search

Rotating machinery accounts for the vast majority of modern technological hardware. While the dynamic behavior of such machinery has always been important, the current emphasis on higher efficiency has resulted in the design of machines which are increasingly susceptible to vibratory phenomena. In particular, reduction in weight, coupled with increased operating speeds, have substantially increased the flexibility of rotating machinery.

Mark S. Darlow

1987-01-01

46

Selected Farm Machinery Statistics.  

National Technical Information Service (NTIS)

Domestic sales and exports of U.S. farm machinery have fallen since 1981 due to weak farm economies at home and abroad. In the United States, gross capital expenditures for new and used farm machinery skyrocketed during the 1970's, peaked in 1979 at $11.8...

M. Hanthorn, C. Sisco

1986-01-01

47

B0 insensitive multiple-quantum resolved sodium imaging using a phase-rotation scheme  

NASA Astrophysics Data System (ADS)

Triple-quantum filtering has been suggested as a mechanism to differentiate signals from different physiological compartments. However, the filtering method is sensitive to static field inhomogeneities because different coherence pathways may interfere destructively. Previously suggested methods employed additional phase-cycles to separately acquire pathways. Whilst this removes the signal dropouts, it reduces the signal-to-noise per unit time. In this work we suggest the use of a phase-rotation scheme to simultaneously acquire all coherence pathways and then separate them via Fourier transform. Hence the method yields single-, double- and triple-quantum filtered images. The phase-rotation requires a minimum of 36 instead of six cycling steps. However, destructive interference is circumvented whilst maintaining full signal-to-noise efficiency for all coherences.

Fiege, Daniel P.; Romanzetti, Sandro; Tse, Desmond H. Y.; Brenner, Daniel; Celik, Avdo; Felder, Jörg; Jon Shah, N.

2013-03-01

48

Detecting of transient vibration signatures using an improved fast spatial-spectral ensemble kurtosis kurtogram and its applications to mechanical signature analysis of short duration data from rotating machinery  

NASA Astrophysics Data System (ADS)

Detecting transient vibration signatures is of vital importance for vibration-based condition monitoring and fault detection of the rotating machinery. However, raw mechanical signals collected by vibration sensors are generally mixtures of physical vibrations of the multiple mechanical components installed in the examined machinery. Fault-generated incipient vibration signatures masked by interfering contents are difficult to be identified. The fast kurtogram (FK) is a concise and smart gadget for characterizing these vibration features. The multi-rate filter-bank (MRFB) and the spectral kurtosis (SK) indicator of the FK are less powerful when strong interfering vibration contents exist, especially when the FK are applied to vibration signals of short duration. It is encountered that the impulsive interfering contents not authentically induced by mechanical faults complicate the optimal analyzing process and lead to incorrect choosing of the optimal analysis subband, therefore the original FK may leave out the essential fault signatures. To enhance the analyzing performance of FK for industrial applications, an improved version of fast kurtogram, named as "fast spatial-spectral ensemble kurtosis kurtogram", is presented. In the proposed technique, discrete quasi-analytic wavelet tight frame (QAWTF) expansion methods are incorporated as the detection filters. The QAWTF, constructed based on dual tree complex wavelet transform, possesses better vibration transient signature extracting ability and enhanced time-frequency localizability compared with conventional wavelet packet transforms (WPTs). Moreover, in the constructed QAWTF, a non-dyadic ensemble wavelet subband generating strategy is put forward to produce extra wavelet subbands that are capable of identifying fault features located in transition-band of WPT. On the other hand, an enhanced signal impulsiveness evaluating indicator, named "spatial-spectral ensemble kurtosis" (SSEK), is put forward and utilized as the quantitative measure to select optimal analyzing parameters. The SSEK indicator is robuster in evaluating the impulsiveness intensity of vibration signals due to its better suppressing ability of Gaussian noise, harmonics and sporadic impulsive shocks. Numerical validations, an experimental test and two engineering applications were used to verify the effectiveness of the proposed technique. The analyzing results of the numerical validations, experimental tests and engineering applications demonstrate that the proposed technique possesses robuster transient vibration content detecting performance in comparison with the original FK and the WPT-based FK method, especially when they are applied to the processing of vibration signals of relative limited duration.

Chen, BinQiang; Zhang, ZhouSuo; Zi, YanYang; He, ZhengJia; Sun, Chuang

2013-10-01

49

Dynamic simulation of high speed rotating machinery  

E-print Network

Rotor and the Two Bearing Configurations Model Journal Bearing Model Radial Tilting Pad Bearing Mounting of Rotor-Bearing Assembly Rotor Response -- Model Journal Bearing . Page 12 14 18 19 20 21 22 23 24 27 30 32 33 34 3r 36 37 38... on the following pages follow the style of the Journal of En ineerin for Power. influence coefficients of the rotor-bearing system [3, 4] and balanc- ing by the consideration of the modal response of the rotor [5]. Models have been used to verify...

Morgan, Eddie Lee

2012-06-07

50

Agriculture Power and Machinery.  

ERIC Educational Resources Information Center

This guide is intended to assist vocational agriculture teachers who are teaching secondary- or postsecondary-level courses in agricultural power and machinery. The materials presented are based on the Arizona validated occupational competencies and tasks for the following occupations: service manager, shop foreman, service technician, and tractor…

Rogers, Tom

51

Agriculture Education. Farm Machinery.  

ERIC Educational Resources Information Center

This curriculum guide is designed for group instruction of secondary agricultural education students enrolled in one or two semester-long courses in farm machinery. The guide presents units of study in the following areas: (1) small gas engines, (2) job opportunities, (3) tractors, (4) engines, (5) hydraulics, (6) electrical system, (7) combine…

Stuttgart Public Schools, AR.

52

Machinery-related injuries  

Microsoft Academic Search

Although it is known that farm machinery is a source of serious and catastrophic farm work-related injuries, little is known about the magnitude of, and potential risk factors for, this problem. The study population is from the five-state Regional Rural Injury Study—I (RRIS—I) that included 3?939 farm households and 13?144 persons who were interviewed about their injury experience and farming

Susan Goodwin Gerberich; Robert W Gibson; L. Ronald French; Tae-Yong Lee; W. Peter Carr; Laura Kochevar; Colleen M Renier; John Shutske

1998-01-01

53

50. Machinery rooms on south tower. Facing south. Machinery rooms ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

50. Machinery rooms on south tower. Facing south. Machinery rooms contain all motors, motor controllers, and gears for operating one span, in this case, the south span. - Henry Ford Bridge, Spanning Cerritos Channel, Los Angeles-Long Beach Harbor, Los Angeles, Los Angeles County, CA

54

49. Machinery rooms on north tower. Facing north. Machinery rooms ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

49. Machinery rooms on north tower. Facing north. Machinery rooms contain all motors, motor controllers, and gears for operating one span, in this case, the north span. Note bell with continuous operating clapper for use as fog signals. - Henry Ford Bridge, Spanning Cerritos Channel, Los Angeles-Long Beach Harbor, Los Angeles, Los Angeles County, CA

55

Similarity based modeling of time synchronous averaged vibration signals for machinery health monitoring  

Microsoft Academic Search

Monitoring rotating machinery is often accomplished with the aid of vibration sensors. The vibration sensor signals contain a wealth of complex information that characterizes the dynamic behavior of the machinery. Transforming this information into useful knowledge about the health of the machine can be challenging due to the presence of extraneous noise sources and variations in the vibration signal itself.

Stephan W. Wegerich

2004-01-01

56

Monitoring of vibrating machinery using artificial neural networks  

Microsoft Academic Search

The primary source of vibration in complex engineering systems is rotating machinery. Vibration signatures collected from these components render valuable information about the operational state of the system and may be used to perform diagnostics. For example, the low frequency domain contains information about unbalance, misalignment, instability in journal bearing and mechanical looseness; analysis of the medium frequency range can

I. E. Alguindigue; A. Loskiewicz-Buczak; R. E. Uhrig

1991-01-01

57

Nicotinic signal transduction machinery.  

PubMed

Nicotinic synapses employ acetylcholine to activate ligand-gated ion channels that are cation-selective in vertebrates. Although the resulting nicotinic cholinergic transmission is famously excitatory at the neuromuscular junction, it plays many additional roles in the CNS. Most prevalent is that of modulation, usually involving calcium and signal transduction. Because of this, it is becoming increasingly important not only to understand the mechanisms that guide nicotinic receptors to appropriate locations but also to identify the postsynaptic machinery making possible the requisite signal transduction. Clearly, the kinds of components tethered in the vicinity of the receptor will assume a major role in determining the consequences of receptor activation. One of the most abundant and interesting nicotinic receptors in this respect is the species comprised of the alpha7 gene product (Broide and Leslie, 1999). These alpha7 homopentameric nicotinic acetylcholine receptors (alpha7 nAChRs) have a high relative permeability to calcium, rivaling that of NMDA receptors. But unlike NMDA receptors, alpha7 nAChRs promote calcium influx without requiring a coincident event such as membrane depolarization. As a result, the receptors are well equipped to regulate calcium-dependent events in neurons, particularly when depolarization might be occluded. PMID:17192663

Berg, D K; Conroy, W G; Liu, Z; Zago, W M

2006-01-01

58

Multirobot inspection of industrial machinery  

E-print Network

Inspection of aircraft and power generation machinery using a swarm of miniature robots is a promising application both from an intellectual and a commercial perspective. Our research is motivated by a case study concerned ...

Correll, Nikolaus

59

Data acquisition in a high-speed rotating frame for New Mexico Institute of Mining and Technology liquid sodium ?? dynamo experiment  

NASA Astrophysics Data System (ADS)

New Mexico Institute of Mining and Technology liquid sodium ??-dynamo experiment models the magnetic field generation in the universe as discussed in detail by Colgate, Li, and Pariev [Phys. Plasmas 8, 2425 (2001)]. To obtain a quasi-laminar flow with magnetic Reynolds number Rm ˜ 120, the dynamo experiment consists of two co-axial cylinders of 30.5 cm and 61 cm in diameter spinning up to 70 Hz and 17.5 Hz, respectively. During the experiment, the temperature of the cylinders must be maintained to 110 °C to ensure that the sodium remains fluid. This presents a challenge to implement a data acquisition (DAQ) system in such high temperature, high-speed rotating frame, in which the sensors (including 18 Hall sensors, 5 pressure sensors, and 5 temperature sensors, etc.) are under the centrifugal acceleration up to 376g. In addition, the data must be transmitted and stored in a computer 100 ft away for safety. The analog signals are digitized, converted to serial signals by an analog-to-digital converter and a field-programmable gate array. Power is provided through brush/ring sets. The serial signals are sent through ring/shoe sets capacitively, then reshaped with cross-talk noises removed. A microcontroller-based interface circuit is used to decode the serial signals and communicate with the data acquisition computer. The DAQ accommodates pressure up to 1000 psi, temperature up to more than 130 °C, and magnetic field up to 1000 G. First physics results have been analyzed and published. The next stage of the ??-dynamo experiment includes the DAQ system upgrade.

Si, Jiahe; Colgate, Stirling A.; Li, Hui; Martinic, Joe; Westpfahl, David

2013-10-01

60

Trends in Power and Machinery  

Microsoft Academic Search

The economic situation and the future supply of food for the growing world population require the productivity of power and machinery to increase further. Moreover, legislation and demands in the areas such as environmental protection, maintenance of product quality and facilitation of work are factors that will exert a decisive influence on future developments.In the foreseeable future, the trend towards

Heinz Dieter Kutzbach

2000-01-01

61

Simulation of Symmetrical Induction Machinery  

Microsoft Academic Search

The effectiveness of an analog computer in studying the performance of induction machinery is demonstrated with computer results which show the dynamic behavior of 2-phase and 3-phase machines during balanced and unbalanced operation. The computer simulation for these various modes of operation is conveniently obtained from the equations which describe the symmetrical induction machine in an arbitrary reference frame. Of

P. C. Krause; C. H. Thomas

1965-01-01

62

Tractor & Machinery Safety. 1984 Revision.  

ERIC Educational Resources Information Center

This curriculum guide is intended for use in teaching an instructional unit in tractor and machinery safety that is geared toward college freshmen. Addressed in the individual lessons of the unit are the following topics: understanding the importance of safe and efficient tractor operation, understanding the characteristics of tractors, preparing…

Montana State Office of Public Instruction, Helena. Dept. of Vocational Education Services.

63

30 CFR 56.14204 - Machinery lubrication.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Machinery and Equipment Safety Practices and Operational Procedures § 56.14204 Machinery...

2010-07-01

64

30 CFR 57.14204 - Machinery lubrication.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Machinery and Equipment Safety Practices and Operational Procedures § 57.14204 Machinery...

2010-07-01

65

46 CFR 130.450 - Machinery alarms.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.450 Machinery alarms. (a) Each alarm required by § 130.460 of this...

2012-10-01

66

46 CFR 130.450 - Machinery alarms.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.450 Machinery alarms. (a) Each alarm required by § 130.460 of this...

2013-10-01

67

46 CFR 130.450 - Machinery alarms.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.450 Machinery alarms. (a) Each alarm required by § 130.460 of this...

2011-10-01

68

46 CFR 130.450 - Machinery alarms.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.450 Machinery alarms. (a) Each alarm required by § 130.460 of this...

2010-10-01

69

5. FIRST FLOOR INTERIOR, NITROGEN MACHINERY, MACHINERY ROOM (SEE N4) ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. FIRST FLOOR INTERIOR, NITROGEN MACHINERY, MACHINERY ROOM (SEE N-4) FROM EASTERN ENTRANCE, LOOKING EAST. - Oakland Naval Supply Center, Cold Storage Warehouse, South of C Street between First & Second Street, Oakland, Alameda County, CA

70

Piezoelectric pushers for active vibration control of rotating machinery  

NASA Technical Reports Server (NTRS)

The active control of rotordynamic vibrations and stability by magnetic bearings and electromagnetic shakers was discussed extensively in the literature. These devices, though effective, are usually large in volume and add significant weight to the stator. The use of piezoelectric pushers may provide similar degrees of effectiveness in light, compact packages. Analyses are contained which extend quadratic regulator, pole placement and derivative feedback control methods to the prescribed displacement character of piezoelectric pushers. The structural stiffness of the pusher is also included in the theory. Tests are currently being conducted at NASA Lewis Research Center with piezoelectric pusher-based active vibration control. Results performed on the NASA test rig as preliminary verification of the related theory are presented.

Palazzolo, A. B.; Kascak, A. F.; Lin, R. R.; Montague, J.; Alexander, R. M.

1989-01-01

71

Active vibration control of rotating machinery using piezoelectric pushers  

E-print Network

; = 0 when x = z; where i g j. 3. The sum of the shape factors 4' is unity, i. e. QN; =1 s=t Using shape factors to interpolate the geometry of the undeformed struc- ture, the interpolation formulas become: 9 s 'X(r, s, t) = p Nk'Xk + ? p Ak...; = 0 when x = z; where i g j. 3. The sum of the shape factors 4' is unity, i. e. QN; =1 s=t Using shape factors to interpolate the geometry of the undeformed struc- ture, the interpolation formulas become: 9 s 'X(r, s, t) = p Nk'Xk + ? p Ak...

Barrett, Timothy Stuart

2012-06-07

72

International Plowing Match & Farm Machinery Show  

NSDL National Science Digital Library

The 1995 International Plowing Match & Farm Machinery Show in Ontario, Canada has a site of the Web. The IPM is a non-profit organization of volunteers which annually organizes Canada's largest farm machinery show. The event is commercial and educational. Thousands of school children and educators attend and participate in organized educational activities.

1995-01-01

73

SUGGESTED PROCEDURES FOR ESTIMATING FARM MACHINERY COSTS  

Microsoft Academic Search

The North Central Farm Machinery Task Force is a group of extension economists who evaluated alternative methods for estimating farm machinery costs and made recommendations for the development of extension materials. This paper describes the procedures agreed upon, and explains the rationale for the procedures chosen. The focus is on \\

William F. Lazarus; Roger A. Selley

2002-01-01

74

A hybrid approach for nondestructive assessment and design optimisation and testing of in-service machinery  

Microsoft Academic Search

Complex rotating machinery requires regular condition monitoring inspections to assess their running conditions and their structural integrity to prevent catastrophic failures. Machine failures can be divided into two categories. First is the wear and tear during operation, they range from bearing defects, gear damage, misalignment, imbalance or mechanical looseness, for which simple condition-based maintenance techniques can easily detect the root

Abdul Ghaffar Abdul Rahman; Siamak Noroozi; Mihai Dupac; Syed Mahathir Syed Mohd Al-Attas; John E. Vinney

2012-01-01

75

Vote: The Machinery of Democracy  

NSDL National Science Digital Library

Always one with a timely exhibition that reflects both historical concerns and issues of immediate expediency, the Smithsonian National Museum of American History has created this website as the online incarnation of one of their current exhibits, âÂÂVote: The Machinery of DemocracyâÂÂ. Through a host of relevant items (such as one of the controversial butterfly ballots used in Palm Beach County, Florida, in 2000), the exhibit âÂÂexamines how Americans have historically adopted improved voting techniques as a result of the political, social and technological changes in the country.â The exhibit is divided into nine well-crafted sections, which includes informative retrospectives on the use of paper ballots, the variety of ways in which voters can cast their ballots, and of course, on the fractious situation of the Florida recount of 2000. A final bonus on the site is the thorough bibliography, which includes books, articles, a number of web links, and a few extra webpages on voting technology.

76

29 CFR 1910.214 - Cooperage machinery. [Reserved  

...Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR OCCUPATIONAL SAFETY AND HEALTH STANDARDS Machinery and Machine Guarding § 1910.214 Cooperage machinery....

2014-07-01

77

Rotating drum cameras for high speed photography  

Microsoft Academic Search

The operation of a rotating drum, rotating mirror framing camera is based on an optical shuttering technique eliminating complex mechanisms and improving reliability. Such cameras offer continuous access capability, constant recording rates, economy of operation, and the rapid sequencing, processing, and analysis of shots. Applications include investigations in cloud physics, holography, observing failure mechanisms in high-speed machinery, ballistics, gas combustion,

G. R. van Horn

1977-01-01

78

46 CFR 169.241 - Machinery.  

Code of Federal Regulations, 2010 CFR

...Machinery. (a) At each inspection for certification and periodic inspection, the marine inspector...appurtenances, piping and pipe fittings are examined...examined. (b) During all inspections special attention is...

2010-10-01

79

Productivity Growth Average in Farm Machinery Manufacturing.  

ERIC Educational Resources Information Center

Productivity in farm machinery manufacturing is examined. The authors discuss how the national economy affects productivity, how the growth of agriculture and technology has changed the industry, and how future trends may cause change in the industry. (CT)

Herman, Arthur S.; Ferris, John W.

1982-01-01

80

Calculation of rotational power losses in eight pole radial magnetic bearings  

E-print Network

The need for low-loss high speed bearings in rotating machinery invites the use of active control magnetic bearings. The present study investigates the theoretical power losses of these bearings associated with shaft rotation at a constant angular...

Havelka, Daniel Louis

2012-06-07

81

The research of Computer Aided Ergonomics analysis in farm machinery  

Microsoft Academic Search

The ergonomics question in farm machinery relates operators¿ safety and efficiency, which is important aspect in the farm machinery design. But the developed Computer Aided Ergonomics software has not human body database, which is needed in view of farm machinery design in China, therefore the farm machinery design have deviation in Ergonomics analysis. This article propose that using the open

Xiyin Gaol; Haijun Yang; Pengyun Xu; Qian Wang; Ying Zheng

2008-01-01

82

Using Operating Deflection Shapes to Detect Unbalance in Rotating Equipment  

Microsoft Academic Search

In this paper, we demonstrate the use of the operational de- flection shape (ODS) of a rotating machine as a means of detecting unbalance in its rotating components. Our pur- pose is to use a significant change in the ODS as an early warning indicator of unbalance in the rotating components. Tests were performed on a machinery fault simulator under

Surendra N. Ganeriwala; Mark H. Richardson; Spectra Quest

2008-01-01

83

Highly Accurate Molecular Constants for Carbon Monoxide, Hydrogen-Fluoride Hydrogen-Chloride Hydroxyl, Sodium-Hydride Magnesium-Hydride and Oxygen: Rotational Transition Frequencies Measured with Tunable Far Infrared Radiation  

NASA Astrophysics Data System (ADS)

Using tunable far infrared (FIR) radiation, accurate rotational transition frequencies have been measured for several stable and transient diatomic molecules. The tunable FIR radiation is generated by nonlinear mixing of radiation from two CO(,2) lasers in a metal-insulator-metal diode. The FIR difference-frequency is radiated from the diode's antenna: a typical FIR power level is 10('-7) Watts. The combination of lines from a waveguide CO(,2) laser, with its larger tuning range, and CO(,2) isotope lasers provides nearly complete coverage of the FIR region (300 to 6000 GHz). The spectrometer utilizing this radiation source is described. CO, HF, and HCl transitions were measured throughout the FIR region and revised molecular constants derived. These measurements provide easily obtained, highly accurate frequency standards for the FIR region. Rotational and fine-structure transitions between the lower rotational levels of the hydroxyl radical in its X('2)(PI) state have been measured to an accuracy of 100-200 kHz. These measurements both confirm and improve upon the best previous estimates, which were obtained by extrapolation of laser magnetic resonance data. Collisional broadening to two of these OH transitions was measured for collisions with oxygen and nitrogen. Rotational spectra in the v = 0, 1, 2, and 3 levels of the X('1)(SIGMA) state of sodium hydride were observed and a revised set of Dunham coefficients determined. These constants are typically an order of magnitude more accurate than the best values previously available. Pure rotational spectra of MgH and MgD in the X('2)(SIGMA) state were measured. The MgH measurements and derived molecular constants provide accurate frequencies for an efficient search for this molecule in the interstellar medium. Five FIR transitions of the oxygen molecule in its ground electronic and vibrational state were also measured. This is the first measurement of these lines outside of an external magnetic field and yields new values for the molecular parameters. The lineshape of one of these transitions is analyzed at various pressures and a pressure self-broadening parameter of 2.32(48) MHz/Torr is obtained. The first experimental observation of sub-Doppler lineshapes in tunable FIR spectroscopy was accomplished using a FIR-infrared double resonance scheme.

Zink, Lyndon Robert

84

The Machinery of Mitochondrial Inheritance and Behavior  

NSDL National Science Digital Library

The distribution of mitochondria to daughter cells during cell division is an essential feature of cell proliferation. Until recently, it was commonly believed that inheritance of mitochondria and other organelles was a passive process, a consequence of their random diffusion throughout the cytoplasm. A growing recognition of the reticular morphology of mitochondria in many living cells, the association of mitochondria with the cytoskeleton, and the coordinated movements of mitochondria during cellular division and differentiation has illuminated the necessity for a cellular machinery that mediates mitochondrial behavior. Characterization of the underlying molecular components of this machinery is providing insight into mechanisms regulating mitochondrial morphology and distribution.

Michael Yaffe (University of California;Department of Biology)

1999-03-05

85

EARNINGS IN THE MACHINERY INDUSTRIES, MID-1966.  

ERIC Educational Resources Information Center

RESULTS OF A MID-1966 NATIONWIDE SURVEY BY THE BUREAU OF LABOR STATISTICS SHOWED THAT THE EARNINGS OF PRODUCTION AND RELATED NONELECTRICAL MACHINERY WORKERS IN 21 LARGE OCCUPATIONAL AREAS VARIED BY OCCUPATION, SIZE OF ESTABLISHMENT, AND COMMUNITY, INDUSTRY, LABOR-MANAGEMENT CONTRACT STATUS, AND LOCATION. THE AVERAGE HOURLY WAGE WAS $2.84. HIGHER…

BAUER, FREDERICK L.

86

The Protein Import Machinery of Mitochondria*  

E-print Network

The Protein Import Machinery of Mitochondria* Published, JBC Papers in Press, February 18, 2004, which are well conserved in the eukaryotic kingdom. Protein Import Pathways into Mitochondria Mitochondria consist of two membranes, the outer mem- brane and the folded inner membrane, and two aqueous com

Economou, Tassos

87

Pattern Recognition for Automatic Machinery Fault Diagnosis  

Microsoft Academic Search

We present a generic methodology for machinery fault diagnosis through pattern recog- nition techniques. The proposed method has the advantage of dealing with complicated signatures, such as those present in the vibration signals of rolling element bearings with and without defects. The signature varies with the location and severity of bearing defects, load and speed of the shaft, and different

Qiao Sun; Ping Chen; Dajun Zhang; Fengfeng Xi

2004-01-01

88

Video monitoring system for large maintenance machinery  

Microsoft Academic Search

Large railway maintenance machinery plays a significant role in ensuring the railway running safety. Video monitoring system for monitoring the process of maintenance and construction such as the tamping machine is an important research topic to achieve the goal of supervising the working state and working quality. A video monitoring system based on TMS320DM642 DSP?» local network and GPRS is

Xie Jiangsheng

2011-01-01

89

Measuring Leakage From Large, Complicated Machinery  

NASA Technical Reports Server (NTRS)

Test chamber improvised from large bag. Cumulative sizes of leaks in large, complicated machinery measure with relatively simple variation of helium leak-checking technique. When used to check Space Shuttle main engine, new technique gave repeatable and correct results within 0.5 stdin.3/min (1.4 x 10 negative to the seventh power stdm3/s).

Bottemiller, S.

1987-01-01

90

Two Generation Farming: Transferring Machinery and Livestock  

Microsoft Academic Search

Once the younger party has made a long-term commitment to farming, the parties should consider how to transfer control and owner-ship of farm assets. This publication discusses considerations for transferring the use and ownership of personal property such as farm machinery, breeding livestock, and crop and livestock inventories.

William M. Edwards; Donald Hofstrand

1998-01-01

91

Machinery Management: Acquiring Farm Machinery Services--Ownership, Custiom Hire, Rental Leasing  

Microsoft Academic Search

Today farmers can easily invest more than $100,000 in a single tractor or combine. Although most farmers own their own machinery, options such as custom hiring, renting, and leasing also are popular alternatives.

William M. Edwards; Vernon M. Meyer

2001-01-01

92

Practical machinery management for process plants. Volume 2: Machinery failure analysis and troubleshooting  

Microsoft Academic Search

This book offers methods for analyzing and troubleshooting machinery component distress. It is a systematic approach to machinery failures involving gears, rolling-element bearing, sliding bearings, bolting, couplings, mechanical seals, pumps, compressors, electric motors, steam turbines, and similar equipment. It treats formal failure-analysis reporting techniques in depth, showing organizational and procedural requirements for the successful definition of root-cause problems. the text

H. P. Bloch; F. K. Geitner

1983-01-01

93

13. DETAILED INTERIOR VIEW OF ROLLER GATE OPERATING MACHINERY HOUSE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

13. DETAILED INTERIOR VIEW OF ROLLER GATE OPERATING MACHINERY HOUSE, SHOWING ROLLER GATE OPERATING MACHINERY, LOOKING NORTH - Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO

94

12. DETAILED INTERIOR VIEW OF ROLLER GATE OPERATING MACHINERY HOUSE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. DETAILED INTERIOR VIEW OF ROLLER GATE OPERATING MACHINERY HOUSE, SHOWING ROLLER GATE OPERATING MACHINERY, LOOKING SOUTH - Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO

95

46 CFR 58.20-15 - Installation of refrigerating machinery.  

Code of Federal Regulations, 2010 CFR

...ENGINEERING MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS Refrigeration Machinery § 58.20-15 Installation of refrigerating...control device located outside the compartment. (c) All refrigeration compressor spaces shall be effectively ventilated and...

2010-10-01

96

30 CFR 56.14205 - Machinery, equipment, and tools.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Machinery and Equipment Safety Practices and Operational Procedures § 56.14205 Machinery,...

2010-07-01

97

30 CFR 57.14205 - Machinery, equipment, and tools.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Machinery and Equipment Safety Practices and Operational Procedures § 57.14205 Machinery,...

2010-07-01

98

Estimating farm machinery complements based on cropmix and farm size  

E-print Network

complement for representative crop farms. Machinery complement data was collected from 31 representative farms. These data were used to estimate Ordinary Least Squares regression models for 16 machinery complement categories for the current market value...

Barrera, Anna Marie

2012-06-07

99

Machinery sharing by agribusiness firms: methodology, application, and simulation  

E-print Network

models include contractual components that are uniquely associated with machinery sharing. Contractual components include penalty payment structure for untimely machinery delivery and the percentages of shared costs paid and depreciation claimed paid...

Wolfley, Jared Lynn

2009-05-15

100

46 CFR 196.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 196.30-5 Section...RESEARCH VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 196.30-5 Accidents to machinery. (a) In the event...

2011-10-01

101

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2011-10-01

102

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2011-10-01

103

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2012-10-01

104

46 CFR 196.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 196.30-5 Section...RESEARCH VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 196.30-5 Accidents to machinery. (a) In the event...

2012-10-01

105

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2012-10-01

106

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2010-10-01

107

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2010-10-01

108

46 CFR 130.460 - Placement of machinery alarms.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.460 Placement of machinery alarms. (a) Visible and audible alarms must...

2013-10-01

109

46 CFR 130.460 - Placement of machinery alarms.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.460 Placement of machinery alarms. (a) Visible and audible alarms must...

2011-10-01

110

46 CFR 130.460 - Placement of machinery alarms.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.460 Placement of machinery alarms. (a) Visible and audible alarms must...

2010-10-01

111

46 CFR 130.460 - Placement of machinery alarms.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.460 Placement of machinery alarms. (a) Visible and audible alarms must...

2012-10-01

112

46 CFR 109.205 - Inspection of boilers and machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Inspection of boilers and machinery. 109.205 Section...Inspections § 109.205 Inspection of boilers and machinery. The chief engineer...charge, before he assumes charge of the boilers and machinery of a unit shall...

2011-10-01

113

46 CFR 109.205 - Inspection of boilers and machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Inspection of boilers and machinery. 109.205 Section...Inspections § 109.205 Inspection of boilers and machinery. The chief engineer...charge, before he assumes charge of the boilers and machinery of a unit shall...

2012-10-01

114

46 CFR 109.205 - Inspection of boilers and machinery.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Inspection of boilers and machinery. 109.205 Section...Inspections § 109.205 Inspection of boilers and machinery. The chief engineer...charge, before he assumes charge of the boilers and machinery of a unit shall...

2013-10-01

115

46 CFR 109.205 - Inspection of boilers and machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Inspection of boilers and machinery. 109.205 Section...Inspections § 109.205 Inspection of boilers and machinery. The chief engineer...charge, before he assumes charge of the boilers and machinery of a unit shall...

2010-10-01

116

PER UNIT COSTS TO OWN AND OPERATE FARM MACHINERY  

Microsoft Academic Search

Entropy and jackknife estimation procedures were used to find that custom rates are 20.3% lower than the true cost to own and operate machinery for an average size Kansas farm. A method was then developed to estimate a farms total machinery costs with which to benchmark machinery costs.

Aaron J. Beaton; Kevin C. Dhuyvetter; Terry L. Kastens

2003-01-01

117

Thermal spray manual for machinery components  

SciTech Connect

The Thermal Spray Manual For Machinery Components is a National Shipbuilding Research (SP-7) Project. This Manual is being developed by Puget Sound Naval Shipyard with the help of other government thermal spray facilities and SP-7 panel members. The purpose of the manual is to provide marine repair facilities with a ``how to do`` document that will be ``user friendly`` and known to be technically sound through production experience. The manual`s intent is to give marine repair facilities the ability to maximize the thermal spray process as a repair method for machinery components and to give these facilities guidelines on how to become qualified to receive certification that they meet the requirements of Military Standard 1687A.

Travis, R.; Ginther, C.; Herbstritt, M.; Herbstritt, J. [Puget Sound Naval Shipyard, Bremerton, WA (United States)

1995-12-31

118

The Mechanotransduction Machinery of Hair Cells  

NSDL National Science Digital Library

Mechanotransduction, the conversion of mechanical force into an electrochemical signal, allows living organisms to detect touch, hear, register movement and gravity, and sense changes in cell volume and shape. Hair cells in the vertebrate inner ear are mechanoreceptor cells specialized for the detection of sound and head movement. Each hair cell contains, at the apical surface, rows of stereocilia that are connected by extracellular filaments to form an exquisitely organized bundle. Mechanotransduction channels, localized near the tips of the stereocilia, are gated by the gating spring, an elastic element that is stretched upon stereocilia deflection and mediates rapid channel opening. Components of the mechanotransduction machinery in hair cells have been identified and several are encoded by genes linked to deafness in humans, which indicates that defects in the mechanotransduction machinery are the underlying cause of some forms of hearing impairment.

Nicolas Grillet (La Jolla;Scripps Research Institute REV); Piotr Kazmierczak (La Jolla;Scripps Research Institute REV); Wei Xiong (La Jolla;Scripps Research Institute REV); Martin Schwander (La Jolla;Scripps Research Institute REV); Anna Reynolds (La Jolla;Scripps Research Institute REV); Hirofumi Sakaguchi (National Institute of Deafness and Other Communication Disorders;Laboratory of Cell Structure and Dynamics REV)

2009-08-25

119

Machinery Vibration Monitoring Program at the Savannah River Site  

SciTech Connect

The Reactor Maintenance's Machinery Vibration Monitoring Program (MVMP) plays an essential role in ensuring the safe operation of the three Production Reactors at the Westinghouse Savannah River Company (WRSC) Savannah River Site (SRS). This program has increased machinery availability and reduced maintenance cost by the early detection and determination of machinery problems. This paper presents the Reactor Maintenance's Machinery Vibration Monitoring Program, which has been documented based on Electric Power Research Institute's (EPRI) NP-5311, Utility Machinery Monitoring Guide, and some examples of the successes that it has enjoyed.

Potvin, M.M.

1990-01-01

120

40 CFR Appendix A to Part 438 - Typical Products in Metal Products and Machinery Sectors  

Code of Federal Regulations, 2010 CFR

...machinery & equipment, except oil field MOTOR VEHICLE Auto Exhaust System...Actuators Fluid Power Pumps & Motors General Industrial Machinery...Equipment Metal Working Machinery Motors & Generators Oil Field Machinery & Equipment...

2010-07-01

121

40 CFR Appendix A to Part 438 - Typical Products in Metal Products and Machinery Sectors  

Code of Federal Regulations, 2011 CFR

...machinery & equipment, except oil field MOTOR VEHICLE Auto Exhaust System...Actuators Fluid Power Pumps & Motors General Industrial Machinery...Equipment Metal Working Machinery Motors & Generators Oil Field Machinery & Equipment...

2011-07-01

122

Runway Rotations  

NSDL National Science Digital Library

Students will use small paper airplanes to model rotations required to turn onto a runway. Students will rotate planes 45, 90, 180, 270, and 360 degrees. Students will identify and describe the results of rotations using benchmark angles.

2012-11-16

123

Association for Computing Machinery: e-voting  

NSDL National Science Digital Library

The Association for Computing Machinery is "an international scientific and educational organization dedicated to advancing the arts, sciences, and applications of information technology." This website provides the official position for the Association on computer-based voting systems. Their position is that "while computer-based e-voting systems have the potential to improve the electoral process, such systems must embody careful engineering, strong safeguards, and rigorous testing in both their design and operation." The website also reports on results from a poll of the members, indicating that 86.38% of the members surveyed "strongly agreed" with this position.

124

The Ubiquitination Machinery of the Ubiquitin System  

PubMed Central

The protein ubiquitin is a covalent modifier of proteins, including itself. The ubiquitin system encompasses the enzymes required for catalysing attachment of ubiquitin to substrates as well as proteins that bind to ubiquitinated proteins leading them to their final fate. Also included are activities that remove ubiquitin independent of, or in concert with, proteolysis of the substrate, either by the proteasome or proteases in the vacuole. In addition to ubiquitin encoded by a family of fusion proteins, there are proteins with ubiquitin-like domains, likely forming ubiquitin's ?-grasp fold, but incapable of covalent modification. However, they serve as protein-protein interaction platforms within the ubiquitin system. Multi-gene families encode all of these types of activities. Within the ubiquitination machinery “half” of the ubiquitin system are redundant, partially redundant, and unique components affecting diverse developmental and environmental responses in plants. Notably, multiple aspects of biotic and abiotic stress responses require, or are modulated by, ubiquitination. Finally, aspects of the ubiquitin system have broad utility: as components to enhance gene expression or to regulate protein abundance. This review focuses on the ubiquitination machinery: ubiquitin, unique aspects about the synthesis of ubiquitin and organization of its gene family, ubiquitin activating enzymes (E1), ubiquitin conjugating enzymes (E2) and ubiquitin ligases, or E3s. Given the large number of E3s in Arabidopsis this review covers the U box, HECT and RING type E3s, with the exception of the cullin-based E3s.

Callis, Judy

2014-01-01

125

Dalteparin sodium.  

PubMed

Dalteparin sodium (Fragmin, Pharmacia Corporation) is a low molecular weight heparin (LMWH) with a mean molecular weight of approximately 5000 Da. As with the other LMWHs, dalteparin sodium has certain advantages over unfractionated heparin (UFH), most important of which are improved bio-availability by sc. injection, a prolonged antithrombotic activity which is highly correlated with body weight permitting the o.d. administration of the drug. Dalteparin sodium has been subjected to a large number of well-designed randomised clinical trials for the prevention and treatment of thrombotic disorders. Based on data from the randomised clinical trials, dalteparin sodium has been approved internationally for a wide spectrum of clinical indications (e.g., prevention of thromboembolic events after surgery). Dalteparin sodium has also been studied in randomised controlled trials in the maintenance of graft patentcy following peripheral vascular surgery, in place of warfarin for the long-term treatment of patients presenting with deep vein thrombosis (DVT), in the prevention of upper extremity thrombosis in patients with indwelling portacath devices and in pregnant patients with a history of previous venous thromboembolism with or without thrombophilia. Dalteparin sodium has been compared with heparin for the prevention of thrombotic complications during haemodyalisis and haemofiltration. These studies have shown promising results but further work is required before dalteparin sodium can be recommended for these indications. PMID:11585001

Pineo, G F; Hull, R D

2001-08-01

126

Rotating photons  

NASA Astrophysics Data System (ADS)

We propose a quantum theory of rotating light beams and study some of its properties. Such beams are polychromatic and have either a slowly rotating polarization or a slowly rotating transverse mode pattern. We show there are, for both cases, three different natural types of modes that qualify as rotating, one of which is a new type not previously considered. We discuss differences between these three types of rotating modes on the one hand and non-rotating modes as viewed from a rotating frame of reference on the other, thus resolving some paradoxes mentioned recently.

van Enk, S. J.; Nienhuis, G.

2007-01-01

127

Sodium Phosphate  

MedlinePLUS

... at other times before, during, and after your treatment with sodium phosphate. Clear liquids are liquids that can be seen through such as water, flavored water, lemonade without pulp, apple juice, and ginger ale. Do not drink ...

128

Sodium Oxybate  

MedlinePLUS

... attacks of cataplexy (episodes of muscle weakness that begin suddenly and last for a short time) and ... go to sleep for the night. Sodium oxybate begins to work very quickly. Place your second dose ...

129

The SNARE Machinery in Mast Cell Secretion  

PubMed Central

Mast cells are known as inflammatory cells which exert their functions in allergic and anaphylactic reactions by secretion of numerous inflammatory mediators. During an allergic response, the high-affinity IgE receptor, Fc?RI, becomes cross-linked by receptor-bound IgE and antigen resulting in immediate release of pre-synthesized mediators – stored in granules – as well as in de novo synthesis of various mediators like cytokines and chemokines. Soluble N-ethylmaleimide-sensitive factor attachment protein (SNAP) receptors (SNARE) proteins were found to play a central role in regulating membrane fusion events during exocytosis. In addition, several accessory regulators like Munc13, Munc18, Rab GTPases, secretory carrier membrane proteins, complexins, or synaptotagmins were found to be involved in membrane fusion. In this review we summarize our current knowledge about the SNARE machinery and its mechanism of action in mast cell secretion. PMID:22679448

Lorentz, Axel; Baumann, Anja; Vitte, Joana; Blank, Ulrich

2012-01-01

130

54. VIEW TO SOUTH OF WINDING MACHINERY: General view towards ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

54. VIEW TO SOUTH OF WINDING MACHINERY: General view towards the south showing the winding machinery on the first floor of the Washington and Mason Streets powerhouse and car barn. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

131

52. VIEW NORTHEAST ACROSS WINDING MACHINERY: Overall view towards northwest ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

52. VIEW NORTHEAST ACROSS WINDING MACHINERY: Overall view towards northwest of the winding machinery on the first floor of the Washington and Mason Streets powerhouse and car barn. Photograph taken from museum mezzanine looking along the tension runs. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

132

46 CFR 58.01-40 - Machinery, angles of inclination.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Machinery, angles of inclination. 58.01-40 Section...Requirements § 58.01-40 Machinery, angles of inclination. (a) Propulsion...inclined under static conditions at any angle of list up to and including 15°,...

2010-10-01

133

46 CFR 58.01-40 - Machinery, angles of inclination.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Machinery, angles of inclination. 58.01-40 Section...Requirements § 58.01-40 Machinery, angles of inclination. (a) Propulsion...inclined under static conditions at any angle of list up to and including 15°,...

2011-10-01

134

Association for Computing Machinery Committee on Women in Computing  

E-print Network

Association for Computing Machinery Committee on Women in Computing 1515 Broadway New York, NY 10036-5701 +1-212-626-0514 acmw-chapters@acm.org http://www.acm.org/women Bylaws of the Chapter of the Association for Computing Machinery's Committee on Women in Computing, UW­Madison Chapter wacm

Liblit, Ben

135

33 CFR 157.39 - Machinery space bilges.  

Code of Federal Regulations, 2013 CFR

...33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Machinery space bilges. 157.39 Section...39 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Operation § 157.39 Machinery space bilges. (a) A tank...

2013-07-01

136

33 CFR 157.39 - Machinery space bilges.  

Code of Federal Regulations, 2011 CFR

...33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Machinery space bilges. 157.39 Section...39 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Operation § 157.39 Machinery space bilges. (a) A tank...

2011-07-01

137

33 CFR 157.39 - Machinery space bilges.  

Code of Federal Regulations, 2012 CFR

...33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Machinery space bilges. 157.39 Section...39 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Operation § 157.39 Machinery space bilges. (a) A tank...

2012-07-01

138

33 CFR 157.39 - Machinery space bilges.  

Code of Federal Regulations, 2010 CFR

...33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Machinery space bilges. 157.39 Section...39 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...Operation § 157.39 Machinery space bilges. (a) A tank...

2010-07-01

139

Machinery Management. FMO: Fundamentals of Machine Operation. Third Edition.  

ERIC Educational Resources Information Center

This text is intended to provide a basic understanding of selecting, maintaining, and managing farm machinery. The following topics are covered in the individual chapters: dealing with typical problems in farm machinery management; measuring machine capacity; improving field efficiency; matching machine size and capacity; estimating power…

Bowers, Wendell

140

SUGGESTED PROCEDURES FOR ESTIMATING FARM MACHINERY COSTS FOR EXTENSION AUDIENCES  

Microsoft Academic Search

North Central Farm Machinery Task Force is a group of extension economists who evaluated alternative methods for estimating farm machinery costs and made recommendations for the development of extension materials. This paper describes the procedures agreed upon, and explains the rationale for the procedures chosen. The focus is on \\

William F. Lazarus; Roger A. Selley

2001-01-01

141

Selected US farm machinery market characteristics and their implications for the future  

Microsoft Academic Search

Trends in farm machinery use suggest the US farm machinery market is a replacement market. Moreover, since 1960, the price of machinery has risen relative to prices for other production inputs. Econometric analysis suggests that higher relative machinery prices encourage input substitution. Thus, relative price trends should be a major concern to the machinery industry. The analysis also suggests that

Carl Zulauf; Gary D. Schnitkey

1989-01-01

142

Rotational geophone  

SciTech Connect

A combination velocity and rotational geophone apparatus is described for obtaining data for seismic records representing the direction of propagation of shear waves in a seismic wave, the apparatus comprising: a velocity geophone; and a rotational geophone, the rotational geophone being disposed in relation to the velocity geophone to respond to the rate of rotational waves in a plane including the sensitive axis of the velocity geophone.

Cowles, C.S.

1986-07-29

143

46 CFR 189.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2012 CFR

...false Standards in inspection of hulls, boilers, and machinery. 189.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2012-10-01

144

46 CFR 91.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2012 CFR

...false Standards in inspection of hulls, boilers, and machinery. 91.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2012-10-01

145

46 CFR 91.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2013 CFR

...false Standards in inspection of hulls, boilers, and machinery. 91.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2013-10-01

146

46 CFR 167.15-25 - Inspection standards for hulls, boilers and machinery.  

Code of Federal Regulations, 2011 CFR

...false Inspection standards for hulls, boilers and machinery. 167.15-25 Section...15-25 Inspection standards for hulls, boilers and machinery. Except as otherwise...regarding the construction of hulls, boilers and machinery in effect on the...

2011-10-01

147

46 CFR 189.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2013 CFR

...false Standards in inspection of hulls, boilers, and machinery. 189.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2013-10-01

148

46 CFR 71.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2010 CFR

...false Standards in inspection of hulls, boilers, and machinery. 71.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2010-10-01

149

46 CFR 91.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2011 CFR

...false Standards in inspection of hulls, boilers, and machinery. 91.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2011-10-01

150

46 CFR 91.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2010 CFR

...false Standards in inspection of hulls, boilers, and machinery. 91.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2010-10-01

151

46 CFR 189.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2011 CFR

...false Standards in inspection of hulls, boilers, and machinery. 189.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2011-10-01

152

46 CFR 167.15-25 - Inspection standards for hulls, boilers and machinery.  

Code of Federal Regulations, 2013 CFR

...false Inspection standards for hulls, boilers and machinery. 167.15-25 Section...15-25 Inspection standards for hulls, boilers and machinery. Except as otherwise...regarding the construction of hulls, boilers and machinery in effect on the...

2013-10-01

153

46 CFR 167.15-25 - Inspection standards for hulls, boilers and machinery.  

Code of Federal Regulations, 2010 CFR

...false Inspection standards for hulls, boilers and machinery. 167.15-25 Section...15-25 Inspection standards for hulls, boilers and machinery. Except as otherwise...regarding the construction of hulls, boilers and machinery in effect on the...

2010-10-01

154

46 CFR 189.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2010 CFR

...false Standards in inspection of hulls, boilers, and machinery. 189.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2010-10-01

155

46 CFR 71.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2013 CFR

...false Standards in inspection of hulls, boilers, and machinery. 71.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2013-10-01

156

46 CFR 71.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2011 CFR

...false Standards in inspection of hulls, boilers, and machinery. 71.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2011-10-01

157

46 CFR 167.15-25 - Inspection standards for hulls, boilers and machinery.  

Code of Federal Regulations, 2012 CFR

...false Inspection standards for hulls, boilers and machinery. 167.15-25 Section...15-25 Inspection standards for hulls, boilers and machinery. Except as otherwise...regarding the construction of hulls, boilers and machinery in effect on the...

2012-10-01

158

46 CFR 71.15-1 - Standards in inspection of hulls, boilers, and machinery.  

Code of Federal Regulations, 2012 CFR

...false Standards in inspection of hulls, boilers, and machinery. 71.15-1 Section...15-1 Standards in inspection of hulls, boilers, and machinery. In the inspection of hulls, boilers, and machinery of vessels, the...

2012-10-01

159

46 CFR 119.465 - Ventilation of spaces containing diesel machinery.  

Code of Federal Regulations, 2013 CFR

... false Ventilation of spaces containing diesel machinery. 119.465 Section 119.465...119.465 Ventilation of spaces containing diesel machinery. (a) A space containing diesel machinery must be fitted with adequate...

2013-10-01

160

46 CFR 182.465 - Ventilation of spaces containing diesel machinery.  

Code of Federal Regulations, 2012 CFR

... false Ventilation of spaces containing diesel machinery. 182.465 Section 182.465...182.465 Ventilation of spaces containing diesel machinery. (a) A space containing diesel machinery must be fitted with adequate...

2012-10-01

161

46 CFR 182.465 - Ventilation of spaces containing diesel machinery.  

Code of Federal Regulations, 2013 CFR

... false Ventilation of spaces containing diesel machinery. 182.465 Section 182.465...182.465 Ventilation of spaces containing diesel machinery. (a) A space containing diesel machinery must be fitted with adequate...

2013-10-01

162

Laser Doppler vibrometry on rotating structures in coast-down: resonance frequencies and operational deflection shape characterization  

Microsoft Academic Search

In rotating machinery, variations of modal parameters with rotation speed may be extremely important in particular for very light and undamped structures, such as helicopter rotors or wind turbines. The natural frequency dependence on rotation speed is conventionally measured by varying the rotor velocity and plotting natural frequencies versus speed in the so-called Campbell diagram. However, this kind of analysis

M. Martarelli; P. Castellini; C. Santolini; E. P. Tomasini

2011-01-01

163

Powerhouse east, north and west elevations and operating machinery, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Powerhouse - east, north and west elevations and operating machinery, battery storage building, and typical span of steel service bridge - Grand Valley Diversion Dam, Half a mile north of intersection of I-70 & Colorado State Route 65, Cameo, Mesa County, CO

164

87. DAM TAINTER GATE OPERATING MACHINERY TRAVELING HOIST ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

87. DAM - TAINTER GATE OPERATING MACHINERY - TRAVELING HOIST - AMERICAN TYPE ASSEMBLY (ML-5-55/111-FS), February 1938 - Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

165

29. VIEW OF TAINTER GATE VALVE OPERATING MACHINERY HOUSING AND ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

29. VIEW OF TAINTER GATE VALVE OPERATING MACHINERY HOUSING AND LOCKMAN'S SHELTER, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO

166

28. VIEW OF MITER GATE OPERATING MACHINERY, SHOWING MITER GATE, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

28. VIEW OF MITER GATE OPERATING MACHINERY, SHOWING MITER GATE, GATE STRUT, AND SECTOR ARM, LOOKING EAST - Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO

167

49. VIEW OF OPERATING MACHINERY AND TAINTER VALVES IN COFFERDAM ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

49. VIEW OF OPERATING MACHINERY AND TAINTER VALVES IN COFFERDAM Photograph No. 1459. August 31, 1936 - Upper Mississippi River Nine-Foot Channel Project, Lock & Dam No. 25, Cap au Gris, Lincoln County, MO

168

86. DAM TAINTER GATE OPERATING MACHINERY HOIST CAR ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

86. DAM - TAINTER GATE OPERATING MACHINERY - HOIST CAR NO. 2 - ELECTRIFICATION HOIST CLUTCH MODIFICATION (ML-5-55/6), March 1956 - Upper Mississippi River 9-Foot Channel Project, Lock & Dam No. 5, Minneiska, Winona County, MN

169

7. Interior view of machinery looking at window of east ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. Interior view of machinery looking at window of east wall of 1953 addition, view to northeast. - Ellsworth Air Force Base, Waste Water Treatment Plant, Ellsworth Street, Blackhawk, Meade County, SD

170

46 CFR 111.103-3 - Machinery space ventilation.  

Code of Federal Regulations, 2010 CFR

...103-3 Section 111.103-3 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL REQUIREMENTS Remote Stopping Systems § 111.103-3 Machinery space...

2010-10-01

171

46 CFR 111.103-9 - Machinery stop stations.  

Code of Federal Regulations, 2012 CFR

...103-9 Section 111.103-9 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL REQUIREMENTS Remote Stopping Systems § 111.103-9 Machinery stop...

2012-10-01

172

46 CFR 196.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2010 CFR

...Section 196.30-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 196.30-5 Accidents to machinery....

2010-10-01

173

11. AUXILIARY MOTOR AT CENTER OF MACHINERY ROOM INSIDE DRUM. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. AUXILIARY MOTOR AT CENTER OF MACHINERY ROOM INSIDE DRUM. OIL CUP TO MAIN CENTER BEARING BELOW. - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

174

Investigation of Asymmetrical Vibration Isolators for Maritime Machinery Applications.  

National Technical Information Service (NTIS)

The development of a novel vibration isolator test facility is described. It is used to measure the dynamic properties of vibration isolators commonly used in maritime and industrial machinery applications. The vibration isolator test facility is capable ...

J. D. Dickens

1999-01-01

175

36. DETAILS FOR SCREENING MACHINERY, DEER ISLAND PUMPING STATION, METROPOLITAN ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

36. DETAILS FOR SCREENING MACHINERY, DEER ISLAND PUMPING STATION, METROPOLITAN WATER AND SEWERAGE BOARD, METROPOLITAN SEWERAGE WORKS, DECEMBER 1909. Aperture card 6611-1 - Deer Island Pumping Station, Boston, Suffolk County, MA

176

7. Detail, machinery shed atop east portal of Tunnel 28, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. Detail, machinery shed atop east portal of Tunnel 28, showing shaft and pulley system, 210mm lens with electronic flash fill. - Central Pacific Transcontinental Railroad, Tunnel No. 28, Milepost 134.75, Applegate, Placer County, CA

177

Impact of electric towers on farm machinery operations  

SciTech Connect

A special program has been prepared to evaluate land and time lost in the operation of farm machinery around electric towers. Various parameters involved in such a study are described. Applications to various farm productions are also shown. 10 refs.

Fortin, J.M.; Vigneault, C.

1981-01-01

178

Some Examples from the History of Machinery in Teaching TMM  

Microsoft Academic Search

The course of “History of Machinery” or “History of Machines and Mechanisms Sciences” does not exist in the current syllabus\\u000a of Moscow State Technical University named after N. E. Bauman. However, when describing engineering sciences, for example\\u000a TMM, exposing students to some fragments of the history of machinery is not only interesting but also useful. With these examples,\\u000a one can

Alexander Borisov; Alexander Golovin; Anastasia Ermakova

179

65. CALIFORNIA STREET CABLE RAILWAY WINDING MACHINERY: Photocopy of ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

65. CALIFORNIA STREET CABLE RAILWAY - WINDING MACHINERY: Photocopy of February 1955 photograph showing the winding machinery of the California Street Cable Railroad. The two suspended sheaves on the right of the photograph bore down on the cable as it left the winders, supplying tension to the cable and eliminating the need for a long tension run. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

180

8. MACHINERY SHED STORAGE ROOM ADDITION DETAIL SHOWING MATRIX OF ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

8. MACHINERY SHED STORAGE ROOM ADDITION DETAIL SHOWING MATRIX OF NAILS USED TO ADHERE PORTLAND CEMENT PLASTER, SOUTH ADOBE WALL ADJACENT TO WINDOW Note: Photographs Nos. AZ-159-A-9 through AZ-159-A-10 are photocopies of photographs. The original prints and negatives are located in the SCS Tucson Plant Materials Center, Tucson, Arizona. Photographer Ted F. Spaller. - Tucson Plant Material Center, Machinery Shed, 3241 North Romero Road, Tucson, Pima County, AZ

181

Using Operating Deflection Shapes to Detect Faults in Rotating Equipment  

Microsoft Academic Search

\\u000a This paper is the third in a series where an operating deflection shape (ODS) is used as the means of detecting faults in\\u000a rotating machinery [1] [2]. In this paper, ODS comparison is used as a means of detecting unbalance and misalignment in a\\u000a rotating machine. Our purpose is to use significant changes in the ODS as an early warning

Arul Muthukumarasamy; Tom Wolff; Mark Richardson

182

Structure and modelling of the three-dimensional boundary layer on a rotating disk: Progress report  

SciTech Connect

The objectives of this research are to develop an improved understanding of the effects of mean flow three dimensionality on boundary layer flow and heat transfer. The specific problem of interest, the flow on a large rotating disk in an otherwise quiescent environment was selected for its geometric simplicity and for its relevance to rotating machinery design.

Eaton, J.K.

1993-12-31

183

Rotating Wavepackets  

ERIC Educational Resources Information Center

Any free-particle wavepacket solution of Schrodinger's equation can be converted by differentiations to wavepackets rotating about the original direction of motion. The angular momentum component along the motion associated with this rotation is an integral multiple of [h-bar]. It is an "intrinsic" angular momentum: independent of origin and…

Lekner, John

2008-01-01

184

46 CFR 32.35-1 - Boilers and machinery-TB/ALL.  

Code of Federal Regulations, 2013 CFR

...1 2013-10-01 2013-10-01 false Boilers and machinery-TB/ALL. 32.35-1 Section...Main and Auxiliary Machinery § 32.35-1 Boilers and machinery—TB/ALL. Boilers, main and auxiliary machinery, and piping...

2013-10-01

185

46 CFR 32.35-1 - Boilers and machinery-TB/ALL.  

Code of Federal Regulations, 2011 CFR

...1 2011-10-01 2011-10-01 false Boilers and machinery-TB/ALL. 32.35-1 Section...Main and Auxiliary Machinery § 32.35-1 Boilers and machinery—TB/ALL. Boilers, main and auxiliary machinery, and piping...

2011-10-01

186

46 CFR 32.35-1 - Boilers and machinery-TB/ALL.  

Code of Federal Regulations, 2012 CFR

...1 2012-10-01 2012-10-01 false Boilers and machinery-TB/ALL. 32.35-1 Section...Main and Auxiliary Machinery § 32.35-1 Boilers and machinery—TB/ALL. Boilers, main and auxiliary machinery, and piping...

2012-10-01

187

The Design of Farm Machinery Statistics Management System Based on Network  

Microsoft Academic Search

The farm machinery statistics is an important task of the farm machinery management, agricultural machinery statistics will provide the main basis for decision-making. With the development of computer technology, the use of advanced software technology and network technology can change the traditional agricultural machinery statistical methods. So, three tasks has done in this paper. First, the present situation of the

Li Hua; Yin Wenqing; Qi Xindan

2008-01-01

188

Development of the Farm Machinery Statistical Management System Based on Web  

NASA Astrophysics Data System (ADS)

The farm machinery statistics is an important task of the farm machinery management, the statistics of farm machinery in Jiangsu Province are very wide. Improving the working of statistical analyses by advanced computer technology, enhancing the efficiency, is a topic which the farm machinery superintendent and the scientific and technical worker explore continuously. The present situation of the farm machinery statistics management informationization was analyzed .Mainly, the status of the farm machinery statistics management in Jiangsu Province was investigated. Subsequently, the farm machinery statistics management system based on the Web database was developed and the introduction on main function of the system was made.

Qi, Xindan; Li, Hua; Yin, Wenqing

189

DEVELOPMENT OF THE FARM MACHINERY STATISTICAL MANAGEMENT SYSTEM BASED ON WEB  

Microsoft Academic Search

\\u000a The farm machinery statistics is an important task of the farm machinery management, the statistics of farm machinery in Jiangsu\\u000a Province are very wide. Improving the working of statistical analyses by advanced computer technology, enhancing the efficiency,\\u000a is a topic which the farm machinery superintendent and the scientific and technical worker explore continuously. The present\\u000a situation of the farm machinery

Xindan Qi; Hua Li; Wenqing Yin

2009-01-01

190

Structural analyses of the pre-mRNA splicing machinery  

PubMed Central

Pre-mRNA splicing is a critical event in the gene expression pathway of all eukaryotes. The splicing reaction is catalyzed by the spliceosome, a huge protein-RNA complex that contains five snRNAs and hundreds of different protein factors. Understanding the structure of this large molecular machinery is critical for understanding its function. Although the highly dynamic nature of the spliceosome, in both composition and conformation, posed daunting challenges to structural studies, there has been significant recent progress on structural analyses of the splicing machinery, using electron microscopy, crystallography, and nuclear magnetic resonance. This review discusses key recent findings in the structural analyses of the spliceosome and its components and how these findings advance our understanding of the function of the splicing machinery. PMID:23592432

Zhang, Lingdi; Li, Xueni; Zhao, Rui

2013-01-01

191

Integrated measure and control system for textile machinery  

NASA Astrophysics Data System (ADS)

In this paper, textile mechanical drive control is researched. Textile machinery integrated measure and control system is established. The system is composed of micro-computer, PLC, transducer, implement device, all kinds of detective components and industrial Ethernet etc. Technology of industrial field bus control and Internet technique are applied. The system is on a background of textile production technique, such as spring, woven, chemical fiber, non-woven, dyeing and finishing. A network based open integrated control system is developed. Various characteristics of production technique flow and textile machinery movement discipline are presented. Configuration software is introduced according to user's control tasks. Final remote automatic controls are finished. This may make development cost reduced, and development periods shortened. Some problems in textile machinery development process are solved, which may make transparency factory and remote development realized.

Liu, Yuantao; Zhao, Jinzhi; Zhao, Zexiang

2010-12-01

192

Selection of operating machinery parameters for a bucket excavator  

SciTech Connect

The mining industry uses extensively single-bucket excavators of the straight shovel type, like the EKG-4.6, as the most effective way of loading previously loosened hard and abrasive excavated rocks. Therefore, an increase in their working efficiency, mainly as regards increasing productivity, reducing load on the operating machinery, and reducing wear of the operating machinery elements, is of particular importance. Analysis shows that the possibilities for this lie in the correct selection of movement trajectory parameters for the excavator bucket, which for existing excavators are inadequate for loading excavated rock. The authors study here the effect of trajectory parameters on excavator bucket filling, and on their basis they select parameters for the operating machinery.

Fabrichnyi, Y.F.; Baboshin, K.V.; Etinger, I.M.; Mekk, V.A.

1985-05-01

193

MicroRNA Machinery Genes as Novel Biomarkers for Cancer  

PubMed Central

MicroRNAs (miRNAs) directly and indirectly affect tumorigenesis. To be able to perform their myriad roles, miRNA machinery genes, such as Drosha, DGCR8, Dicer1, XPO5, TRBP, and AGO2, must generate precise miRNAs. These genes have specific expression patterns, protein-binding partners, and biochemical capabilities in different cancers. Our preliminary analysis of data from The Cancer Genome Atlas consortium on multiple types of cancer revealed significant alterations in these miRNA machinery genes. Here, we review their biological structures and functions with an eye toward understanding how they could serve as cancer biomarkers. PMID:24904827

Huang, Jing-Tao; Wang, Jin; Srivastava, Vibhuti; Sen, Subrata; Liu, Song-Mei

2014-01-01

194

Characterization of Rotating Structures in Coast-down by means of Continuous Tracking Laser Doppler Vibrometer  

Microsoft Academic Search

\\u000a In rotating machinery variations of modal parameters with rotation speed may be extremely important in particular if very\\u000a light and undamped structures are taken into account, like helicopters rotors or wind turbines. The relation between natural\\u000a frequencies and rotation speed is expressed in the form of Campbell diagrams. However it could be required to know also the\\u000a deviation of operational

M. Martarelli; C. Santolini; P. Castellini

195

Sodium content (image)  

MedlinePLUS

... contribute to high blood pressure. When watching the intake of sodium, read labels carefully to determine the total sodium content. Canned, packaged, and frozen foods can be particularly high in sodium.

196

Design of a hydraulic actuator for active control of rotating machinery  

NASA Technical Reports Server (NTRS)

A hydraulic actuator is described which consists of a pump, a hydraulic servo-valve, and a thin elastic plate which transduces the generated pressure variations into forces acting on a mass which simulates the bearing of a rotor system. An actuator characteristic number is defined to provide a base for an optimum design of force actuators with combined weight, frequency, and force considerations. This characteristic number may also be used to compare hydraulic and electromagnetic force actuators. In tests, this actuator generated 182.3 Newton force at a frequency of 100 Hz and a displacement amplitude of 5.8 x 10 exp -5 meter.

Rashidi, Majid; Dirusso, Eliseo

1991-01-01

197

Diagnostics of subsynchronous vibrations in rotating machinery - methodologies to identify potential instability  

E-print Network

of this thesis is to explore means of diagnosing whether subsynchronous vibrations are benign or have the potential to become unstable. Several methods will be detailed to draw lines of demarcation between the two. Considerable focus of the research has been...

Kar, Rahul

2005-11-01

198

Selection of informative frequency band in local damage detection in rotating machinery  

NASA Astrophysics Data System (ADS)

Problem of informative frequency band (IFB) selection in vibration signal processing for local damage detection is discussed. It is proposed to extend the concept of automatic and objective IFB selection proposed by several authors. Till now, kurtosis was preferred as criterion for IFB search. Thus, it is offered to study set of statistics, namely Jarque-Bera, Kolmogorov-Smirnov, Cramer-von Mises, Anderson-Darling, quantile-quantile plot and a method based on the local maxima approach in order to verify their abilities of IFB selection. Also similarities between them are described. It has been proved by simulation and real data analysis that proposed selectors (because they allow us to “select” frequency band) might be equivalent to the spectral kurtosis (SK) in ordinary cases. Moreover, some of the novel selectors are better, because they are less sensitive to incidental spikes that might occur during the signal acquisition process. Proposed selectors might be (as SK) the basis for filter design for informative signal extraction.

Obuchowski, Jakub; Wy?oma?ska, Agnieszka; Zimroz, Rados?aw

2014-10-01

199

Diagnosis and Prognosis of Bearing Failure in Rotating Machinery Using Acoustic Emission and Artificial Neural Network  

NASA Astrophysics Data System (ADS)

Bearing failure is well-known as a common problem in industries. Therefore, timely diagnosis and prognosis (DAP) of bearing fault is very crucial in order to prevent sudden damages. This paper proposes the practical method of bearing fault DAP using acoustic emission (AE) technique assisted with artificial neural network (ANN). The bearings failure data is measured based on the AE in terms of decibel (dB) and Distress levels, which are used as input for ANN of a bearing fault DAP. For this purpose, an experimental rig is setup to collect data from target bearing by using Machine Health Checker (MHC) Memo assisted with MHC Analysis software. In this work, Elman network with training algorithm, Levenberg-Marquardt Back- propagation is used for ANN DAP. The obtained results indicates that the proposed methods are suitable to inform the remaining useful life time of a faulty bearing.

Mahamad, Abd Kadir; Hiyama, Takashi; Ghazali, Mohd Imran

200

Wide band fiber Bragg grating accelerometer for rotating AC machinery condition monitoring  

NASA Astrophysics Data System (ADS)

This paper investigates the use of fiber Bragg grating (FBG) accelerometers for wide band vibration monitoring in a wound rotor induction generator. The sensor performance is assessed in a series of experiments on a laboratory test rig comprising a 30kW induction machine operating under steady state and variable speed regimes. Vibration measurements are investigated in the frequency domain for generator fault specific electromagnetically induced vibration components. The fiber optic sensor effectiveness in detection of wide band spectral effects (<1kHz) in the vibration signal is compared with that of a commercial piezoelectric based solution. The potential and limitations of the prototype wide band FBG accelerometer are evaluated for use in vibration monitoring applications.

Vilchis-Rodriguez, Damian S.; Djurovic, Sinisa; Kung, Peter; Comanici, Maria I.; Scepanovic, S.; Tshiloz, Kavul; Smith, Alexander C.

2014-09-01

201

Modeling and simulation methods for MDOF structures and rotating machinery with impact dampers  

SciTech Connect

Previously published work on applied impact damping typically relates to SDOF models or simple MDOF models such as the classical cantilever beam. Structural models often require an extremely large number of DOF with mode shapes that are generally very complex. Dynamics simulation of these typically becomes both complicated and time consuming. The nonlinear behavior of impact dampers further complicates such simulation in that standard linear solutions are not possible. The primary objective in this research extends previous work by applying impact dampers to MDOF structures that are modeled with general three-dimensional beam finite elements. Modal-based models of the MDOF systems and efficient impact damper tracking algorithms were also developed that significantly reduced CPU time for simulation. Significant among the objectives was obtaining an impact damper design for the MDOF casing structure of the Space Shuttle Main Engine (SSME), High-Pressure Oxygen Turbo-Pump (HPOTP), subject to pump rotor shaft unbalance. Impact damper performance is based on suppression of vibration at casing critical frequencies for rotor speed ranges, at rotor full speed, and very high unbalance to simulate a defect such as losing an impeller blade fragment or a cracked bearing. Simulations show significant reductions in vibration at the casing critical frequencies and very high unbalance levels while little or no improvement was observed off resonance. Additionally, the previous work with an experimental rotor bearing system (RBS) and impact damper was modeled using the developed modal-based methods. Simulation of the resulting model response shows remarkable agreement with the experimental. Finally, both the RBS and the HPOTP were modeled and simulated as unstable systems with attached impact dampers. The simulations predict that the impact damper is an excellent stabilizing mechanism for a range of instability driver values.

McElhaney, J.M.; Palazzolo, A. [Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering; Kascak, A. [Army, Cleveland, OH (United States)

1997-04-01

202

Analysis and experimental study of a plate-type hydraulic vibration damper for cryogenic rotating machinery  

E-print Network

to prevent rotordynamic instabilities and to reduce unbalance response at critical speeds. other requirements for cryogenic dampers include the ability to be effective in cryogenic liquids and to operate without excessive bearing loads. A major goal... by developing high-load dampers that operate in a cryogenic environment. Von Prageneau (1990) developed a design to improve bearing service life by using unique damping seals and damping bearings with ball bearings. The high fluid film stiffness...

Olan, Emmanuel Angustia

2012-06-07

203

Rotor-Model-Based Identification of Foundations in Rotating Machinery Using Modal Parameters  

NASA Astrophysics Data System (ADS)

The vibration of a rotor bearing foundation system is affected by its foundation which needs to be identified. Outlined is an identification procedure for foundations of turbomachinery installations which avoids rotor removal. Input data requires knowledge of the forces transmitted to the foundation at the bearings and of the motion of the foundation at specified locations. Such data can be obtained from existing monitoring instrumentation provided the dynamic properties of the rotor and the rotor unbalance are known. Numerical experiments show that even with input data truncated to two significant digits, satisfactory identification is possible for a flexibly supported undamped rigid block foundation. It is concluded that this identification technique promises to be applicable in the field.

Feng, N.; Hahn, E.

204

49. WORTHINGTON ENGINE AND AIRCOMPRESSOR SYSTEM FOR UPSTAIRS TEXTILE MACHINERY. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

49. WORTHINGTON ENGINE AND AIR-COMPRESSOR SYSTEM FOR UPSTAIRS TEXTILE MACHINERY. THIS SYSTEM WAS REPLACED BY ONE ON THE EXTERIOR OF THE BUILDING AFTER 1945, BUT WAS NEVER REMOVED. LOCATED IN AIR COMPRESSOR ROOM BETWEEN MILL NO. 2 AND BOILER ROOM. - Prattville Manufacturing Company, Number One, 242 South Court Street, Prattville, Autauga County, AL

205

Illinois Occupational Skill Standards: Agricultural Machinery Service Technician.  

ERIC Educational Resources Information Center

These Illinois skill standards for agriculture machinery service technician are intended to serve as a guide to workforce preparation program providers as they define content for their programs and to employers as they establish the skills and standards necessary for job acquisition. They could also serve as a mechanism for communication among…

Illinois Occupational Skill Standards and Credentialing Council, Carbondale.

206

Miniseries: Illustrating the Machinery of Life Escherichia coli*  

E-print Network

Miniseries: Illustrating the Machinery of Life Escherichia coli* Received for publication, August that support a recent textbook illustration of an Escherichia coli cell. The image magnifies a portion of life.'' This is how I began my 1991 article that presented several illustrations of Escherichia coli [1

Economou, Tassos

207

11. Forward machinery space looking aft toward starboard side, showing ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. Forward machinery space looking aft toward starboard side, showing blower engine in foreground with belt running to blower. Steering engine lies in background; note sheave for port side steering cable in upper right hand corner of view. - Ferry TICONDEROGA, Route 7, Shelburne, Chittenden County, VT

208

3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. VIEW TO NORTHEAST, NORTH SIDE OF CENTER DRUM MACHINERY ROOM. MOTOR #1 COMPARTMENT IN REAR, AUXILIARY MOTOR DRIVE SHAFT, POWER PANELS ON BACK OF AUXILIARY MOTOR HOUSE. BRIDGE DECK FRAMING ABOVE. - Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

209

30. PLAN AND SECTION DRAWINGS OF SPILLWAY, HEADGATES AND MACHINERY, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

30. PLAN AND SECTION DRAWINGS OF SPILLWAY, HEADGATES AND MACHINERY, PENSTOCKS, SURGE TANKS, AND POWERHOUSE General plan and sections, Drawing F1709. Prepared by the Washington Water Power Company, April 23, 1924. - Enloe Dam, On Similkameen River, Oroville, Okanogan County, WA

210

Toxoplasma gondii: conserved protein machinery in an unusual secretory pathway?  

PubMed

The protozoan parasite Toxoplasma gondii has a very specialized secretory apparatus. In this review we will discuss how different methodological approaches, including morphological studies, biochemistry and genetics, are revealing a novel secretory organization, whose function is performed, mainly, by a highly conserved protein machinery found in mammalian cells. PMID:10742686

Liendo, A; Joiner, K A

2000-02-01

211

30. VIEW NORTHEAST OF OPERATING MACHINERY. BASCULE LEAF IN CLOSED ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

30. VIEW NORTHEAST OF OPERATING MACHINERY. BASCULE LEAF IN CLOSED POSITION - DRIVE GEAR 'D' IS AT CENTER OF PHOTOGRAPH. NOTE VERNACULAR WEIGHT SUSPENDED ON COUNTERWEIGHT AT TOP LEFT OF PHOTOGRAPH TO COMPENSATE FOR AN UNDERWEIGHT COUNTERWEIGHT - Tomlinson Bridge, Spanning Quinnipiac River at Forbes Street (U.S. Route 1), New Haven, New Haven County, CT

212

Association for Computing Machinery Advancing Computing as a Science & Profession  

E-print Network

commissioned by the U.S. Public Policy Committee of the Association for Computing Machinery February 2006 and expert recommendations to state and local election officials, policy makers, and the public about, the computing community, and the U.S. public in all matters of U.S. public policy related to information

Wagner, David

213

Crop-Machinery Management System For Farm Cost Analysis  

E-print Network

Abstract: Assessment of the total costs of agricultural farm is important to decide for selection of optimum combination of machinery, crops and farming system that can maximize profit. The decision on optimum combination of these factors by customary way is quite difficult due to their natural complexity. A computer system was develop in Excel-Visual basic software for farm management decision making, and to estimate machinery and the whole farm costs and net return from crops grown under different farming systems. The system deals with four crops and three farming systems by using tractor and six machines. The input data includes: crops type, operations, machine and inputs cost. The system was verified, validated, analyzed and its accuracy was approved. The system outputs change with various input parameters like farm size, machines used and crops combination. Application of the system showed that annual working hours, size and age of machines affect the fixed and total operation costs. The least operation cost was obtained by conventional farming system followed by zero tillage and heavy machinery system. Different crops varied in their costs when grown alone or in combinations in different farming systems. The lowest and highest net returns were obtained by growing sorghum alone with heavy machinery farming system and by growing the four crops in Zero-Tillage farming system. The system can be used as pre-season planning and management decision tool.

Lotfie A. Yousif; Mohamed H. Dahab; Haitham R. El Ramlawi

214

A MULTIVARIATE ANALYSIS OF FACTORS INFLUENCING FARM MACHINERY PURCHASE DECISIONS  

Microsoft Academic Search

This paper presents a model of the farm management process. The model suggests that certain socioeconomic characteristics of farm managers will influence their decision-making process. Several characteristics are hypothesized an tested using multivariate techniques (multivariate analysis of variance, range tests, and multiple comparisons). The analysis indicates that the soil zone, value of machinery inventory, operator's age, and operator's education influence

Thomas G. Johnson; William J. Brown; Kevin OGrady

1985-01-01

215

Feasibility Study of Inspection of Farm Machinery Safety Features  

Microsoft Academic Search

Agriculture continues to be a very hazardous industry. One of the possible risk factors injuries may be the absence of safety features on farm machinery. A feasibility study was undertaken to assess the feasibility of obtaining information on deficiencies or absence of safety devices. Tractors and Power take-off (PTO) driven machines on 36 dairy farms were inspected. The pilot study

Mark A. Purschwitz; Dean T. Stueland; Barbara C. Lee

1994-01-01

216

Rotation Curves  

NSDL National Science Digital Library

This website, from the University of California, Berkeley, provides a description of the study of stellar motion around the center of a galaxy, and includes a graph of rotational speed versus distance from the center. The site relates this study to the prediction of dark matter. The page also gives explanations of other lines of evidence for dark matter. ____________________________________

White, Martin

2008-08-04

217

Rotation Matrices  

NSDL National Science Digital Library

Using Maple, Mathmatica, or MatLab, learner should be able to introduce the concept of using matrix multiplication to rotate vectors in two-dimensional space; to provide motivation for the definition of matrix multiplication; to lay the groundwork for using matrices to work with graphics.

Smith, David

2002-01-11

218

Rotating Phasors  

NSDL National Science Digital Library

This interactive phasor page allows you to control the values of a rotating phasor and see a visualization of each change that is done. You can control: one, pos/neg, two, beats, delta, sawtooth, square, triangle, time, zoom, plus you can put into five different values: Frequency (rel, HZ, mHZ), Amplitude (raw, rel), and Phases (Deg, Rad, unitrad).

Sharp, Cory

2011-05-04

219

46 CFR 169.631 - Separation of machinery and fuel tank spaces from accommodation spaces.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Separation of machinery and fuel tank spaces from...Electrical Ventilation § 169.631 Separation of machinery and fuel tank spaces from...watertight or vapor tight engine box. Piping...

2010-10-01

220

46 CFR 169.631 - Separation of machinery and fuel tank spaces from accommodation spaces.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Separation of machinery and fuel tank spaces from...Electrical Ventilation § 169.631 Separation of machinery and fuel tank spaces from...watertight or vapor tight engine box. Piping...

2011-10-01

221

49 CFR 173.222 - Dangerous goods in equipment, machinery or apparatus.  

Code of Federal Regulations, 2010 CFR

...Transportation 2 2010-10-01 2010-10-01 false Dangerous goods in equipment, machinery or apparatus. 173.222...Materials Other Than Class 1 and Class 7 § 173.222 Dangerous goods in equipment, machinery or apparatus....

2010-10-01

222

The Research of Computer Aided Farm Machinery Designing Method Based on Ergonomics  

NASA Astrophysics Data System (ADS)

Along with agricultural economy development, the farm machinery product type Increases gradually, the ergonomics question is also getting more and more prominent. The widespread application of computer aided machinery design makes it possible that farm machinery design is intuitive, flexible and convenient. At present, because the developed computer aided ergonomics software has not suitable human body database, which is needed in view of farm machinery design in China, the farm machinery design have deviation in ergonomics analysis. This article puts forward that using the open database interface procedure in CATIA to establish human body database which aims at the farm machinery design, and reading the human body data to ergonomics module of CATIA can product practical application virtual body, using human posture analysis and human activity analysis module to analysis the ergonomics in farm machinery, thus computer aided farm machinery designing method based on engineering can be realized.

Gao, Xiyin; Li, Xinling; Song, Qiang; Zheng, Ying

223

46 CFR 78.17-30 - Examination of boilers and machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Examination of boilers and machinery. 78.17-30 Section...Inspections § 78.17-30 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2011-10-01

224

46 CFR 97.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Examination of boilers and machinery. 97.15-15 Section...Inspections § 97.15-15 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2013-10-01

225

46 CFR 78.17-30 - Examination of boilers and machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Examination of boilers and machinery. 78.17-30 Section...Inspections § 78.17-30 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2010-10-01

226

46 CFR 167.65-60 - Examination of boilers and machinery by engineer.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Examination of boilers and machinery by engineer. 167.65-60...Requirements § 167.65-60 Examination of boilers and machinery by engineer. It shall...engineer when he assumes charge of the boilers and machinery of a nautical school...

2011-10-01

227

46 CFR 97.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Examination of boilers and machinery. 97.15-15 Section...Inspections § 97.15-15 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2011-10-01

228

46 CFR 97.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Examination of boilers and machinery. 97.15-15 Section...Inspections § 97.15-15 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2012-10-01

229

46 CFR 97.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Examination of boilers and machinery. 97.15-15 Section...Inspections § 97.15-15 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2010-10-01

230

46 CFR 167.65-60 - Examination of boilers and machinery by engineer.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Examination of boilers and machinery by engineer. 167.65-60...Requirements § 167.65-60 Examination of boilers and machinery by engineer. It shall...engineer when he assumes charge of the boilers and machinery of a nautical school...

2010-10-01

231

46 CFR 167.65-60 - Examination of boilers and machinery by engineer.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Examination of boilers and machinery by engineer. 167.65-60...Requirements § 167.65-60 Examination of boilers and machinery by engineer. It shall...engineer when he assumes charge of the boilers and machinery of a nautical school...

2012-10-01

232

46 CFR 196.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Examination of boilers and machinery. 196.15-15 Section...Inspections § 196.15-15 Examination of boilers and machinery. (a) It shall be...engineer when he assumes charge of the boilers and machinery of a vessel to examine...

2011-10-01

233

46 CFR 167.65-60 - Examination of boilers and machinery by engineer.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Examination of boilers and machinery by engineer. 167.65-60...Requirements § 167.65-60 Examination of boilers and machinery by engineer. It shall...engineer when he assumes charge of the boilers and machinery of a nautical school...

2013-10-01

234

46 CFR 78.17-30 - Examination of boilers and machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Examination of boilers and machinery. 78.17-30 Section...Inspections § 78.17-30 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2012-10-01

235

46 CFR 196.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Examination of boilers and machinery. 196.15-15 Section...Inspections § 196.15-15 Examination of boilers and machinery. (a) It shall be...engineer when he assumes charge of the boilers and machinery of a vessel to examine...

2012-10-01

236

46 CFR 78.17-30 - Examination of boilers and machinery.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Examination of boilers and machinery. 78.17-30 Section...Inspections § 78.17-30 Examination of boilers and machinery. It shall be the duty...chief engineer when assuming charge of the boilers and machinery of a vessel to...

2013-10-01

237

46 CFR 196.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Examination of boilers and machinery. 196.15-15 Section...Inspections § 196.15-15 Examination of boilers and machinery. (a) It shall be...engineer when he assumes charge of the boilers and machinery of a vessel to examine...

2013-10-01

238

Rotational Equilibrium  

NSDL National Science Digital Library

In this activity, learners explore the concept of rotational equilibrium. Learners work in teams to estimate and determine the force within a mobile design. Learners solve algebraic equations, apply graphing techniques, compare results and discuss findings. Designing the mobile requires learners to solve a set of two linear algebraic equations. Learners solve the equations using three different methods: by substitution, by graphing the equations and finding the intersection, and by using determinants.

Ieee

2014-05-22

239

Rotation Matrices  

NSDL National Science Digital Library

Created by Lewis Blake and David Smith for the Connected Curriculum Project, the purposes of this module are to introduce the concept of using matrix multiplication to rotate vectors in two-dimensional space; to provide motivation for the definition of matrix multiplication; to lay the groundwork for using matrices to work with graphics. This is part of a larger collection of learning modules hosted by Duke University.

Blake, Lewis; Smith, David

2010-05-24

240

A wireless thermocouples network for temperature control in plastic machinery  

Microsoft Academic Search

In this paper authors propose a wireless thermocouples network purposely developed for plastic machinery. Thanks to a very simple protocol, based on IEEE802.15.4 physical layer, up to sixteen nodes are scanned with a cycle time of 128 ms. Prototypes based on J type thermocouples have been realized with cost similar to wired approaches. A four-nodes network has been tested in

A. Flammini; D. Marioli; E. Sisinni; A. Taroni; M. Pezzotti

2006-01-01

241

CAI - multimedia approach to farm tractor and machinery safety certification  

Microsoft Academic Search

Research was conducted at Purdue University with the primary goal to compare a newly developed self-instructional CAI\\/multimedia computer program with traditional instructional methods for use by youth enrolled in a farm tractor and machinery safety program. Seventy-two subjects selected from three 8th and 9th grade agricultural education classes and one group of middle school-aged youth (grades 6–19) involved in a

Roger L. Tormoehlen; Ernest J. Sheldon; William E. Field

1999-01-01

242

The research of dynamic agricultural machinery working area measure system  

Microsoft Academic Search

A simplified method of area-measurement system of farm machineries was proposed through the study of field test data, and a dynamic vehicle field area-measurement system based on GPS-OEM was built. In the test, the system represented (presented) high speed of information collection and high area measure accuracy with the error rate lower than 2%. The portability and convenience of this

Zhuo Wei; Fang Yang; Li Zhang

2011-01-01

243

Anthropometric survey for agricultural machinery design: an Indian case study.  

PubMed

In Indian agriculture, hand tools, animal-drawn equipment and tractor/power operated machinery are extensively used for various operations. These equipments are either operated or controlled by human workers. Use of anthropometric data can help in the proper design of equipment for better efficiency and more human comfort. Earlier anthropometric surveys carried out in the country were very few and inadequate for use in farm machinery design. Therefore, 52 body dimensions necessary for the design of these equipments were identified and a sample study was conducted on 39 farm workers. The collected anthropometric data were analysed to calculate mean, range, standard deviation and 5th, 50th and 95th percentile values. Through some examples, an effort is made here to illustrate the use of the data in the design of farm equipment. It has now been proposed that extensive surveys should be carried out in different regions of the country to generate the necessary data useful in farm machinery design. PMID:15676734

Gite, L P; Yadav, B G

1989-09-01

244

Rotating Motion  

NSDL National Science Digital Library

In these problems, two people ride on a merry-go-round (radius fixed at 10 m..it's big!). One rider tosses a ball toward the other. The period of motion can be varied as can the initial velocity of the ball, relative to rider. One of the problems is to select the initial velocity of the ball so that it passes through center of the merry-go-round. Another is for the rider who throws the ball to catch it him/herself after exactly half a rotation.

Christian, Wolfgang; Belloni, Mario

2008-02-19

245

Sodium Polystyrene Sulfonate  

MedlinePLUS

Sodium polystyrene sulfonate is used to treat increased amounts of potassium in the body. ... Sodium polystyrene sulfonate comes as a powder and suspension to take by mouth. It may also be used as ...

246

Diclofenac sodium overdose  

MedlinePLUS

Diclofenac sodium is a prescription medicine used to relieve pain and swelling. It is a nonsteroidal anti-inflammatory drug (NSAID). Diclofenac sodium overdose occurs when someone accidentally or intentionally ...

247

The rotating rake fan mode measurement system  

NASA Astrophysics Data System (ADS)

An experimental measurement system was developed and implemented by the NASA Glenn Research Center in the 1990s. The system is a continuously rotating radial rake immersed into the duct. This rotating rake provides a complete map of the acoustic duct modes present in a ducted fan and has been used on a variety of test articles: from a low-speed, concept test rig to a full-scale production turbofan engine. The rotating rake has been critical in developing and evaluating a number of noise reduction concepts as well as providing experimental databases for verification of several aero-acoustic codes. This paper will describe the physical theory (Sofrin) and the analytical techniques (Moore) upon which the rotating rake is based will be described. Data processing and analysis as well as implementation issues will be discussed. Several Rotating Rake systems have been custom built for 3 facilities. In order of complexity of the turbo machinery test article, these are (1) the Advanced Noise Control Fan, (2) various 22-inch fan rigs in the NASA Glenn 9×15 wind tunnel, and (3) a full scale turbofan, the Honeywell TFE-731-60. Descriptions and measurement achievements of these systems will be provided (Heidelberg, Sutliff).

Sutliff, Daniel

2003-10-01

248

Rotating Bioreactor  

NASA Technical Reports Server (NTRS)

The NASA Bioreactor provides a low turbulence culture environment which promotes the formation of large, three-dimensional cell clusters. Due to their high level of cellular organization and specialization, samples constructed in the bioreactor more closely resemble the original tumor or tissue found in the body. NASA-sponsored bioreactor research has been instrumental in helping scientists to better understand normal and cancerous tissue development. In cooperation with the medical community, the bioreactor design is being used to prepare better models of human colon, prostate, breast and ovarian tumors. Cartilage, bone marrow, heart muscle, skeletal muscle, pancreatic islet cells, liver and kidney are just a few of the normal tissues currently being cultured in rotating bioreactors by investigators.

1988-01-01

249

Virus-Mediated Compartmentalization of the Host Translational Machinery  

PubMed Central

ABSTRACT Viruses require the host translational apparatus to synthesize viral proteins. Host stress response mechanisms that suppress translation, therefore, represent a significant obstacle that viruses must overcome. Here, we report a strategy whereby the mammalian orthoreoviruses compartmentalize the translational machinery within virus-induced inclusions known as viral factories (VF). VF are the sites of reovirus replication and assembly but were thought not to contain ribosomes. It was assumed viral mRNAs exited the VF to undergo translation by the cellular machinery, and proteins reentered the factory to participate in assembly. Here, we used ribopuromycylation to visualize active translation in infected cells. These studies revealed that active translation occurs within VF and that ribosomal subunits and proteins required for translation initiation, elongation, termination, and recycling localize to the factory. Interestingly, we observed components of the 43S preinitiation complex (PIC) concentrating primarily at factory margins, suggesting a spatial and/or dynamic organization of translation within the VF. Similarly, the viral single-stranded RNA binding protein ?NS localized to the factory margins and had a tubulovesicular staining pattern that extended a short distance from the margins of the factories and colocalized with endoplasmic reticulum (ER) markers. Consistent with these colocalization studies, ?NS was found to associate with both eukaryotic translation initiation factor 3 subunit A (eIF3A) and the ribosomal subunit pS6R. Together, these findings indicate that ?NS functions to recruit 43S PIC machinery to the primary site of viral translation within the viral factory. Pathogen-mediated compartmentalization of the translational apparatus provides a novel mechanism by which viruses might avoid host translational suppression. PMID:25227463

Desmet, Emily A.; Anguish, Lynne J.

2014-01-01

250

Impact of the Autophagy Machinery on Hepatitis C Virus Infection  

PubMed Central

Autophagy is a cellular process that catabolizes cytoplasmic components and maintains energy homeostasis. As a stress response, the autophagy machinery interconnects a wide range of cellular pathways, enhancing the spread of certain pathogens while limiting others, and has become a highly active research area over the past several years. Independent laboratories have recently reported that autophagy vesicles accumulate in hepatitis C virus (HCV) infected cells and that autophagy proteins can function as proviral factors required for HCV replication. In this review, we summarize what is currently known about the interplay between autophagy and HCV and the possible mechanisms whereby autophagy proteins might favor HCV propagation. PMID:21994783

Dreux, Marlene; Chisari, Francis V.

2011-01-01

251

The Centromere: Chromatin Foundation for the Kinetochore Machinery  

PubMed Central

Since discovery of the centromere-specific histone H3 variant CENP-A, centromeres have come to be defined as chromatin structures that establish the assembly site for the complex kinetochore machinery. In most organisms, centromere activity is defined epigenetically, rather than by specific DNA sequences. In this review, we describe selected classic work and recent progress in studies of centromeric chromatin with a focus on vertebrates. We consider possible roles for repetitive DNA sequences found at most centromeres, chromatin factors and modifications that assemble and activate CENP-A chromatin for kinetochore assembly, plus the use of artificial chromosomes and kinetochores to study centromere function. PMID:25203206

Fukagawa, Tatsuo; Earnshaw, William C.

2014-01-01

252

Optical control and diagnostics sensors for gas turbine machinery  

NASA Astrophysics Data System (ADS)

There exists a vast range of optical techniques that have been under development for solving complex measurement problems related to gas-turbine machinery and phenomena. For instance, several optical techniques are ideally suited for studying fundamental combustion phenomena in laboratory environments. Yet other techniques hold significant promise for use as either on-line gas turbine control sensors, or as health monitoring diagnostics sensors. In this paper, we briefly summarize these and discuss, in more detail, some of the latter class of techniques, including phosphor thermometry, hyperspectral imaging and low coherence interferometry, which are particularly suited for control and diagnostics sensing on hot section components with ceramic thermal barrier coatings (TBCs).

Trolinger, James D.; Jenkins, Thomas P.; Heeg, Bauke

2012-10-01

253

The centromere: chromatin foundation for the kinetochore machinery.  

PubMed

Since discovery of the centromere-specific histone H3 variant CENP-A, centromeres have come to be defined as chromatin structures that establish the assembly site for the complex kinetochore machinery. In most organisms, centromere activity is defined epigenetically, rather than by specific DNA sequences. In this review, we describe selected classic work and recent progress in studies of centromeric chromatin with a focus on vertebrates. We consider possible roles for repetitive DNA sequences found at most centromeres, chromatin factors and modifications that assemble and activate CENP-A chromatin for kinetochore assembly, plus the use of artificial chromosomes and kinetochores to study centromere function. PMID:25203206

Fukagawa, Tatsuo; Earnshaw, William C

2014-09-01

254

173. CANAL TENDER OPERATING LOCK MACHINERY ON THE MORRIS CANAL. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

173. CANAL TENDER OPERATING LOCK MACHINERY ON THE MORRIS CANAL. AS THE LOCK TENDER TURNS THE CRANK, A SMALL COGGED WHEEL (PINION) ON THE CRANK TURNS A LARGER COGGED WHEEL, (MAIN GEAR). MAIN GEAR ENGAGES A COGGED BAR CALLED A TRAVELLER WHICH MOVES FORWARD OR BACK DEPENDING ON WHICH WAY THE CRANK IS TURNED. CONNECTED TO THE TRAVELLER ARE TO LONG RODS (GATE ARMS) WHICH IN TURN ARE CONNECTED TO THE GATE'S TOP BEAM (ONE FOR EACH GATE). AS THE TRAVELLER MOVES FORWARD THE GATE ARMS EXTEND PUSHING THE GATES OPEN. - Morris Canal, Phillipsburg, Warren County, NJ

255

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427119

Batuman, Vecihi

2014-11-27

256

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427122

Alderman, Michael H

2014-11-27

257

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427121

Graudal, Niels

2014-11-27

258

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427120

Saulnier, Pierre-Jean; Gand, Elise; Hadjadj, Samy

2014-11-27

259

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427117

2014-11-27

260

Sodium and cardiovascular disease.  

PubMed

To the Editor: In 2013, I served on an Institute of Medicine (IOM) panel whose members concluded that data published through 2012 relating cardiovascular outcomes to a sodium intake below 2300 mg per day were inconsistent and insufficient.(1) The article by O'Donnell and colleagues (Aug. 14 issue),(2) which presents data from the Prospective Urban Rural Epidemiology (PURE) study, only adds to the confusion. A single morning urine sample is an inaccurate measure of usual sodium intake, ignoring day-to-day variability in sodium intake, diurnal variation in sodium excretion, and the effects of medication.(3) The Kawasaki formula also overestimates sodium exposure in . . . PMID:25427118

Cook, Nancy R

2014-11-27

261

Sodium-sulfur thermal battery  

Microsoft Academic Search

This paper discusses a sodium-sulfur thermal battery for generating electrical energy at temperatures above the melting point of sodium metal and sulfur. It comprises a sodium electrode comprising sodium metal; a sulfur electrode comprising sulfur; and a separator located between the sodium and sulfur electrodes. The separator having sufficient porosity to allow preliminary migration of fluid sodium metal and fluid

Ludwig

1990-01-01

262

Adaptive feature extraction using sparse coding for machinery fault diagnosis  

NASA Astrophysics Data System (ADS)

In the signal processing domain, there has been growing interest in sparse coding with a learned dictionary instead of a predefined one, which is advocated as an effective mathematical description for the underlying principle of mammalian sensory systems in processing information. In this paper, sparse coding is introduced as a feature extraction technique for machinery fault diagnosis and an adaptive feature extraction scheme is proposed based on it. The two core problems of sparse coding, i.e., dictionary learning and coefficients solving, are discussed in detail. A natural extension of sparse coding, shift-invariant sparse coding, is also introduced. Then, the vibration signals of rolling element bearings are taken as the target signals to verify the proposed scheme, and shift-invariant sparse coding is used for vibration analysis. With the purpose of diagnosing the different fault conditions of bearings, features are extracted following the proposed scheme: basis functions are separately learned from each class of vibration signals trying to capture the defective impulses; a redundant dictionary is built by merging all the learned basis functions; based on the redundant dictionary, the diagnostic information is made explicit in the solved sparse representations of vibration signals; sparse features are formulated in terms of activations of atoms. The multiclass linear discriminant analysis (LDA) classifier is used to test the discriminability of the extracted sparse features and the adaptability of the learned atoms. The experiments show that sparse coding is an effective feature extraction technique for machinery fault diagnosis.

Liu, Haining; Liu, Chengliang; Huang, Yixiang

2011-02-01

263

Rapid detection of biothreat agents based on cellular machinery.  

SciTech Connect

This research addresses rapid and sensitive identification of biological agents in a complex background. We attempted to devise a method by which the specificity of the cellular transcriptional machinery could be used to detect and identify bacterial bio-terror agents in a background of other organisms. Bacterial cells contain RNA polymerases and transcription factors that transcribe genes into mRNA for translation into proteins. RNA polymerases in conjunction with transcription factors recognize regulatory elements (promoters) upstream of the gene. These promoters are, in many cases, recognized by the polymerase and transcription factor combinations of one species only. We have engineered a plasmid, for Escherichia coli, containing the virA promoter from the target species Shigella flexneri. This promoter was fused to a reporter gene Green Fluorescent Protein (GFP). In theory the indicator strain (carrying the plasmid) is mixed with the target strain and the two are lysed. The cellular machinery from both cells mixes and the GFP is produced. This report details the results of testing this system.

Lane, Todd W.; Gantt, Richard W.

2004-12-01

264

A dynamically assembled cell wall synthesis machinery buffers cell growth  

PubMed Central

Assembly of protein complexes is a key mechanism for achieving spatial and temporal coordination in processes involving many enzymes. Growth of rod-shaped bacteria is a well-studied example requiring such coordination; expansion of the cell wall is thought to involve coordination of the activity of synthetic enzymes with the cytoskeleton via a stable complex. Here, we use single-molecule tracking to demonstrate that the bacterial actin homolog MreB and the essential cell wall enzyme PBP2 move on timescales orders of magnitude apart, with drastically different characteristic motions. Our observations suggest that PBP2 interacts with the rest of the synthesis machinery through a dynamic cycle of transient association. Consistent with this model, growth is robust to large fluctuations in PBP2 abundance. In contrast to stable complex formation, dynamic association of PBP2 is less dependent on the function of other components of the synthesis machinery, and buffers spatially distributed growth against fluctuations in pathway component concentrations and the presence of defective components. Dynamic association could generally represent an efficient strategy for spatiotemporal coordination of protein activities, especially when excess concentrations of system components are inhibitory to the overall process or deleterious to the cell. PMID:24550500

Lee, Timothy K.; Tropini, Carolina; Hsin, Jen; Desmarais, Samantha M.; Ursell, Tristan S.; Gong, Enhao; Gitai, Zemer; Monds, Russell D.; Huang, Kerwyn Casey

2014-01-01

265

Hospital costs associated with agricultural machinery injuries in Ontario.  

PubMed

To assist those responsible for agricultural safety, we: (1) piloted an approach to costing hospitalized farm injuries; and, (2) described ambulance and inpatient costs associated with these injuries in Ontario. Hospital discharge records (hospital separations) for farm machinery injuries in Ontario (n = 1,610) were identified by ICD9-CM E-codes for 1985-1993. Ambulance costs were estimated by the Ontario Ministry of Health. For each case, the hospital costs were calculated by multiplying the case-specific resource intensity weight by the average inpatient cost per weighted case. The costs (1993 Canadian dollars) ranged from $768 to $62,643 and totaled $6.9 million over the study period. Males accounted for 89.8% of the total costs. Tractor injuries accounted for a large proportion of costs (34.3%). The median costs per case varied by type of machinery, ranging from $2,043 for ploughs/disks to $3,366 for augers. Entanglement injuries were responsible for the largest proportion of costs (40.7%), while tractor rollovers accounted for the highest median cost ($3,065). Although these figures represent a fraction of the total costs associated with farm injuries, the results provide one basis from which to justify and target preventive initiatives. This approach to costing may also be widely applicable to other health issues. PMID:9327074

Hartling, L; Pickett, W; Dorland, J; Brison, R J

1997-11-01

266

A task-based analysis of machinery entanglement injuries among Western Canadian farmers.  

PubMed

Machinery entanglements are a leading cause of hospitalized injury on Canadian farms. This study evaluates the role farm tasks play in the occurrence of machinery entanglement events. A retrospective case series of 41 entanglement injuries involving 35 farm-machinery types was assembled. Only a few limited tasks were implicated in the majority of entanglements. These tasks were as follows: (1) field adjustments of machinery; (2) product handling and conveyance; and (3) driveline attachments and servicing. Hazards inherent and common to these tasks affected the behavior of farmers, leading to entanglements. This study establishes a need to identify hazards and assess risks associated with different tasks involving the use of farm machinery under actual field situations. Systemic changes are required to improve existing machinery safety practices through engineering, work methods, and work practice modifications. In addition to design solutions, occupational health and safety strategies should consider activities associated with hazardous situations to inform the content of injury prevention efforts. PMID:21958400

Narasimhan, Gopinath; Crowe, Trever G; Peng, Yingwei; Hagel, Louise; Dosman, James; Pickett, William

2011-10-01

267

Reversed-phase high-performance liquid chromatographic analysis of liothyronine sodium and levothyroxine sodium in tablet formulations: preliminary studies on dissolution and content uniformity.  

PubMed

Levothyroxine sodium was estimated from tablet formulations of levothyroxine sodium and liotrix (liothyronine sodium-levothyroxine sodium combination tablet). The procedures consisted of the addition of 3,3-,5-triiodothyronine as the internal standard to the pulverized sample, followed by an acidic butanol extraction, evaporation, and injection onto a muBondapak reversed-phase high-performance liquid chromatographic column. The eluent was methanol-water-phosphoric acid (50:50:0.1), and the effluent was monitored by UV detection at 254 nm. A standard linear calibration curve was obtained for direct standard solutions equivalent to 18-225 micrograms of levothyroxine sodium/tablet. The procedure is sensitive enough for single-tablet analysis. Using this procedure, content uniformity studies were performed on liothyronine sodium tablets, levothyroxine sodium tablets, and liotrix tablets. The procedure also was adapted for conducting dissolution studies on levothyroxine sodium tablets in deionized water using the rotating-paddle method. PMID:7205213

Rapaka, R S; Knight, P W; Prasad, V K

1981-02-01

268

THE RESEARCH OF COMPUTER AIDED FARM MACHINERY DESIGNING METHOD BASED ON ERGONOMICS  

Microsoft Academic Search

Along with agricultural economy development, the farm machinery product type Increases gradually, the ergonomics question\\u000a is also getting more and more prominent. The widespread application of computer aided machinery design makes it possible that\\u000a farm machinery design is intuitive, flexible and convenient. At present, because the developed computer aided ergonomics software\\u000a has not suitable human body database, which is needed

Xiyin Gao; Xinling Li; Qiang Song; Ying Zheng

2009-01-01

269

Solubilities of sodium nitrate, sodium nitrite, and sodium aluminate in simulated nuclear waste  

SciTech Connect

Solubilities were determined for sodium nitrate, sodium nitrite, and sodium aluminate in synthetic nuclear waste liquor. Solubilities were determined as a function of temperature and solution composition (concentrations of sodium hydroxide, sodium nitrate, sodium nitrite, and sodium aluminate). Temperature had the greatest effect on the solubilities of sodium nitrate and sodium nitrite and a somewhat lesser effect on sodium aluminate solubility. Hydroxide had a great effect on the solubilities of all three salts. Other solution components had minor effects. 2 references, 8 figures, 11 tables.

Reynolds, D.A.; Herting, D.L.

1984-09-01

270

Sodium fill of FFTF  

SciTech Connect

With construction of the Fast Flux Test Facility (FFTF) completed, the first major objective in the startup program was to fill the sodium systems. A sodium fill sequence was developed to match construction completion, and as systems became available, they were inerted, preheated, and filled with sodium. The secondary sodium systems were filled first while dry refueling system testing was in progress in the reactor vessel. The reactor vessel and the primary loops were filled last. This paper describes the methods used and some of the key results achieved for this major FFTF objective.

Waldo, J.B.; Greenwell, R.K.; Keasling, T.A.; Collins, J.R.; Klos, D.B.

1980-02-01

271

Regulation of innate immunity by the molecular machinery of macroautophagy.  

PubMed

Innate immune responses are the first line of defence for an organism to restrict invading pathogens. They fulfil two main functions, namely detection of the pathogen to successively alarm the appropriate components of the immune system and early inhibition of the infection to prevent demise of the infected organism before a more tailored immune response, usually mediated by the adaptive immune system, can be mounted. Autophagy and phagocytosis, modified by the autophagic core machinery, contribute to these functions by regulating pathogen detection, influencing the production of innate immune mediators and directly restricting intracellular and extracellular pathogens as an effector mechanism of innate immunity. These aspects of the involvement of mainly macroautophagy in innate immune responses will be discussed in this review. PMID:25244600

Münz, Christian

2014-11-01

272

Message in a nucleus: signaling to the transcriptional machinery  

PubMed Central

Summary Tissue differentiation and signal transduction involve dramatic changes in gene expression. These changes can be brought about by the expression or activation of sequence-specific transcription factors. In order to regulate their target genes, such factors must navigate the intricate chromatin environment and engage the complex basal transcriptional machinery. We discuss three mechanisms through which signaling pathways can interact with complexes that alter chromatin structure or recruit RNA polymerase II. Signals that promote differentiation may alter the properties of such transcriptional regulatory complexes by incorporating tissue-specific subunits. Alternatively, adaptor subunits specialized to interact with specific transcription factors may allow a single complex to respond to multiple signals. Finally, individual regulatory proteins may integrate a variety of signals, allowing crosstalk between pathways. PMID:18678250

Carrera, Ines; Treisman, Jessica E.

2008-01-01

273

Case Analysis of Farm Agriculture Machinery Informatization Management Network System  

NASA Astrophysics Data System (ADS)

In the process of China's agricultural modernization, especially agricultural machinery modernization, in terms of equipment, we've chose the way that foreign imports (and domestic research) with the combination of self-developed, in the software, it is difficult to fully apply this approach, the specific reasons are: the modernization of China's agriculture development model is diversified, it is difficult to find a unified management model, even in the scale of operations of the representative state-owned farms and the abroad farms are also very different management models. Due to various types of growth models of biological complexity, diverse climatic and geographical environment factors, coupled with the characteristics such as long cycle of agricultural production, high input, high-risk, and decentralized management, industrial management mode it is very difficult to apply. Moreover, the application of modern management tools is also difficult to quantify the benefits, leading to the current research and application are in a state of comparatively dropped behind.

Yang, Hui; Wang, Xi; Zhuang, Weidong

274

Molecular mechanisms of RNA-triggered gene silencing machineries.  

PubMed

Gene silencing by RNA triggers is an ancient, evolutionarily conserved, and widespread phenomenon. This process, known as RNA interference (RNAi), occurs when double-stranded RNA helices induce cleavage of their complementary mRNAs. Because these RNA molecules can be introduced exogenously as small interfering RNAs (siRNAs), RNAi has become an everyday experimental tool in laboratory research. In addition, the number of RNA-based therapeutics that are currently in clinical trials for a variety of human diseases demonstrate the therapeutic potential of RNAi. In this Account, we focus on our current understanding of the structure and function of various classes of RNAi triggers and how this knowledge has contributed to our understanding of the biogenesis and catalytic functions of siRNA and microRNA in mammalian cells. Mechanistic studies to understand the structure and function of small RNAs that induce RNAi have illuminated broad functions of the ancient RNAi machinery in animals and plants. In addition, such studies have provided insight to identify endogenous physiological gene silencing RNA triggers that engage functional machineries similar to siRNAs. Several endogenous small RNA species have been identified: small noncoding RNAs (microRNAs), piwi-interacting RNAs (piRNAs), and endogenous siRNAs (endo-siRNAs). microRNAs are the most widespread class of small RNAs in mammalian cells. Despite their importance in biology and medicine, the molecular and cellular mechanisms of microRNA biogenesis and function are not fully understood. We provide an overview of the current understanding of how these molecules are synthesized within cells and how they act on gene targets. Interesting questions remain both for understanding the effects of modifications and editing on microRNAs and the interactions between microRNAs and other cellular RNAs such as long noncoding RNAs. PMID:22304792

Li, Zhonghan; Rana, Tariq M

2012-07-17

275

46 CFR 35.25-1 - Examination of boilers and machinery by engineer-T/ALL.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Examination of boilers and machinery by engineer-T/ALL...Department § 35.25-1 Examination of boilers and machinery by engineer—T/ALL...an engineer when assuming charge of the boilers to examine the same forthwith...

2011-10-01

276

46 CFR 35.25-1 - Examination of boilers and machinery by engineer-T/ALL.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Examination of boilers and machinery by engineer-T/ALL...Department § 35.25-1 Examination of boilers and machinery by engineer—T/ALL...an engineer when assuming charge of the boilers to examine the same forthwith...

2012-10-01

277

46 CFR 35.25-1 - Examination of boilers and machinery by engineer-T/ALL.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Examination of boilers and machinery by engineer-T/ALL...Department § 35.25-1 Examination of boilers and machinery by engineer—T/ALL...an engineer when assuming charge of the boilers to examine the same forthwith...

2010-10-01

278

46 CFR 35.25-1 - Examination of boilers and machinery by engineer-T/ALL.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Examination of boilers and machinery by engineer-T/ALL...Department § 35.25-1 Examination of boilers and machinery by engineer—T/ALL...an engineer when assuming charge of the boilers to examine the same forthwith...

2013-10-01

279

Defects in the apoptotic machinery of cancer cells: role in drug resistance  

Microsoft Academic Search

The therapeutic goal in cancer treatment is to trigger tumor-selective cell death. Since many antineoplastic agents induce an apoptotic type of death in susceptible cells, it is likely that dysfunction of the apoptotic machinery might be an important determinant of resistance to anticancer drugs. Here we review known differences in the apoptotic machinery in cancer cells, and how this knowledge

Boris Zhivotovsky; Sten Orrenius

2003-01-01

280

Accounting for tillage equipment and other machinery in agricultural energy analysis  

Microsoft Academic Search

The energy value tillage equipment and farm machinery, based on use industry sources, is presented. Discounting, scrappage, and use are discussed. Comparisons are made between the disaggregated data and initial attempts to determine farm machinery's embodied energy content based on the energy content of automobiles. Pitfalls involved in energy capital accounting and some alternative approaches are noted.

O. C. Doering; T. J. Considine; C. E. Harling

1977-01-01

281

46 CFR 32.56-40 - Category A machinery spaces: Insulation-T/ALL.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Category A machinery spaces: Insulation-T/ALL. 32.56-40 Section 32.56-40 Shipping COAST... § 32.56-40 Category A machinery spaces: Insulation—T/ALL. Structural insulation within category A...

2010-10-01

282

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2010 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2010-10-01

283

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2011 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2011-10-01

284

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2013 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2013-10-01

285

46 CFR 32.56-40 - Category A machinery spaces: Insulation-T/ALL.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Category A machinery spaces: Insulation-T/ALL. 32.56-40 Section 32.56-40 Shipping COAST... § 32.56-40 Category A machinery spaces: Insulation—T/ALL. Structural insulation within category A...

2011-10-01

286

46 CFR 32.56-40 - Category A machinery spaces: Insulation-T/ALL.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Category A machinery spaces: Insulation-T/ALL. 32.56-40 Section 32.56-40 Shipping COAST... § 32.56-40 Category A machinery spaces: Insulation—T/ALL. Structural insulation within category A...

2013-10-01

287

46 CFR 32.56-30 - Category A machinery spaces: Bulkheads and decks-T/ALL.  

Code of Federal Regulations, 2012 CFR

... false Category A machinery spaces: Bulkheads and decks-T/ALL. 32.56-30 Section 32.56-30 Shipping COAST...56-30 Category A machinery spaces: Bulkheads and decks—T/ALL. (a) Bulkheads and decks that separate category A...

2012-10-01

288

Opportunities and Requirements for Entry into the Agricultural Machinery Mechanics Trade. Final Report.  

ERIC Educational Resources Information Center

Data about the farm machinery mechanics trade were obtained from 51 managers of farm machinery dealerships in Texas to determine the content that should be included in courses of study designed to train persons to enter the occupation, and to obtain information about the occupation that would be useful to persons considering the trade as an…

Webb, Earl S.

289

The Negro in the Farm Equipment and Construction Machinery Industries. The Racial Policies of American Industry.  

ERIC Educational Resources Information Center

This study covers two related industries in which Negro employment has historical roots, the farm machinery and construction machinery industries. As in several other studies in this series, emphasis is on the major companies in the industries. This emphasis may reflect a more favorable picture of black employment progress than the average, due to…

Ozanne, Robert; Klemp, Elsa

290

An Analysis of the Skills Required of Agricultural Mechanics at Retail Farm Machinery Dealerships.  

ERIC Educational Resources Information Center

In order to determine needs for teaching various competencies in agricultural mechanics courses, a study was conducted to determine the types and frequencies of service/repair operations performed by an Arizona agricultural machinery company from January 1 to June 30, 1981. Data were obtained from 1,232 service orders at the Arizona Machinery

Jacobs, Clinton O.; Mulcahy, John V.

291

Effect of orthoaminothiophenol on nickel in 3% sodium chloride solution  

SciTech Connect

The use of thiol compounds as inhibitors against corrosion of nickel in 3% sodium chloride (NaCl) solution was studied using a rotating disk electrode (RDE). Stationary and transient measurements were made. Results implied the formation of a thick and compact inhibitor film. A correlation between the inhibiting film and the structure of orthoaminothiophenol (OATP) was shown.

Srhiri, A. [Electrochemistry Lab., Kenitra City (Morocco); Derbali, Y. [National High School of Sciences and Technics, Tunis City (Tunisia). Applied Chemistry Lab.; Picaud, T. [National High School of Chemistry, Toulouse (France). Metallurgy Lab.

1995-10-01

292

A GAS SHAFT SEAL FOR THE HNPF SODIUM PUMP  

Microsoft Academic Search

Lip type, oil labyrinth gas shaft seals were tested for use on Hallam ;\\u000a Power Reactor sodium pumps with a 5-in.diameter rotating shaft. The seals were ;\\u000a not recommended for use owing to excess helium leakage and short life. (C.J.G.)

B. W. Admire; F. S. Nayor

1958-01-01

293

46 CFR 61.20-3 - Main and auxiliary machinery and associated equipment, including fluid control systems.  

Code of Federal Regulations, 2010 CFR

...machinery and associated equipment, including fluid control systems. 61.20-3 Section...machinery and associated equipment, including fluid control systems. (a) At each...its associated equipment, including the fluid control systems, as he feels...

2010-10-01

294

46 CFR 167.65-70 - Reports of accidents, repairs, and unsafe boilers and machinery by engineers.  

Code of Federal Regulations, 2013 CFR

...Reports of accidents, repairs, and unsafe boilers and machinery by engineers. 167...Reports of accidents, repairs, and unsafe boilers and machinery by engineers. (a) Before making repairs to a boiler of a nautical school ship the...

2013-10-01

295

33 CFR 155.400 - Platform machinery space drainage on oceangoing fixed and floating drilling rigs and other...  

Code of Federal Regulations, 2012 CFR

...33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01... false Platform machinery space drainage on oceangoing fixed...400 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...155.400 Platform machinery space drainage on oceangoing...

2012-07-01

296

33 CFR 155.400 - Platform machinery space drainage on oceangoing fixed and floating drilling rigs and other...  

Code of Federal Regulations, 2013 CFR

...33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01... false Platform machinery space drainage on oceangoing fixed...400 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...155.400 Platform machinery space drainage on oceangoing...

2013-07-01

297

33 CFR 155.400 - Platform machinery space drainage on oceangoing fixed and floating drilling rigs and other...  

Code of Federal Regulations, 2010 CFR

...33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01... false Platform machinery space drainage on oceangoing fixed...400 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...155.400 Platform machinery space drainage on oceangoing...

2010-07-01

298

33 CFR 155.400 - Platform machinery space drainage on oceangoing fixed and floating drilling rigs and other...  

Code of Federal Regulations, 2011 CFR

...33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01... false Platform machinery space drainage on oceangoing fixed...400 Navigation and Navigable Waters COAST GUARD, DEPARTMENT...155.400 Platform machinery space drainage on oceangoing...

2011-07-01

299

An Algorithm for Estimation of the Amplitude and Phase of a Vibration Signal Used for Determination of Rotating Mass Unbalance  

Microsoft Academic Search

Amplitude and phase measurements are important for balancing rotating machinery by means of signal analyzers. The most common methods use fast Fourier transform (FFT) algorithm to find the vibration spectrum and extract imbalance force parameters. A different solution is proposed here, based on the FFT but requiring less computational power. Additionally, the algorithms needed for implementation on a vibration meter

A. Podgorski; P. Charazka

2006-01-01

300

Rotational Preference in Gymnastics  

PubMed Central

In gymnastics, most skills incorporate rotations about one or more body axes. At present, the question remains open if factors such as lateral preference and/or vestibulo-spinal asymmetry are related to gymnast’s rotational preference. Therefore, we sought to explore relationships in gymnast’s rotation direction between different gymnastic skills. Furthermore, we sought to explore relationships between rotational preference, lateral preference, and vestibulo-spinal asymmetry. In the experiment n = 30 non-experts, n = 30 near-experts and n = 30 experts completed a rotational preference questionnaire, a lateral preference inventory, and the Unterberger-Fukuda Stepping Test. The results revealed, that near-experts and experts more often rotate rightward in the straight jump with a full turn when rotating leftward in the round-off and vice versa. The same relationship was found for experts when relating the rotation preference in the handstand with a full turn to the rotation preference in the straight jump with a full turn. Lateral preference was positively related to rotational preference in non-expert gymnasts, and vestibulo-spinal asymmetry was positively related to rotational preference in experts. We suggest, that gymnasts should explore their individual rotational preference by systematically practicing different skills with a different rotation direction, bearing in mind that a clearly developed structure in rotational preference between different skills may be appropriate to develop more complex skills in gymnastics. PMID:23486362

Heinen, Thomas; Jeraj, Damian; Vinken, Pia M.; Velentzas, Konstantinos

2012-01-01

301

Alterations in the ribosomal machinery in cancer and hematologic disorders  

PubMed Central

Ribosomes are essential components of the protein translation machinery and are composed of more than 80 unique large and small ribosomal proteins. Recent studies show that in addition to their roles in protein translation, ribosomal proteins are also involved in extra-ribosomal functions of DNA repair, apoptosis and cellular homeostasis. Consequently, alterations in the synthesis or functioning of ribosomal proteins can lead to various hematologic disorders. These include congenital anemias such as Diamond Blackfan anemia and Shwachman Diamond syndrome; both of which are associated with mutations in various ribosomal genes. Acquired uniallelic deletion of RPS14 gene has also been shown to lead to the 5q syndrome, a distinct subset of MDS associated with macrocytic anemia. Recent evidence shows that specific ribosomal proteins are overexpressed in liver, colon, prostate and other tumors. Ribosomal protein overexpression can promote tumorigenesis by interactions with the p53 tumor suppressor pathway and also by direct effects on various oncogenes. These data point to a broad role of ribosome protein alterations in hematologic and oncologic diseases. PMID:22709827

2012-01-01

302

Musculoskeletal symptoms and work ability among agricultural machinery operators.  

PubMed

Those subjects whose employment has physical demands present more frequently musculoskeletal symptoms than others. The agricultural sector activities include tasks with important physical demands that may have a negative impact in the workers health. The aim of this study was to evaluate the presence of musculoskeletal symptoms and its association with work ability in agricultural machinery operators. It is a cross-sectional study. The participants (n = 204) answered a self-administered questionnaire on demographics, work and lifestyle characteristics, Work Ability Index and the Nordic Musculoskeletal Symptoms Questionnaire. The response rate was 89.78%. The mean age of the workers was 32.3 years, and 47.1% of them reported musculoskeletal symptoms at least one body part over the past 12 months. Those subjects who presented work ability index <37 points, 87.5% reported some kind of musculoskeletal symptom. This study showed that the work ability was significantly (p ? 0.05) correlated to musculoskeletal symptoms presence. It is recommended that measures to promote and improve the work ability are designed and deployed based on musculoskeletal disorders prevention. PMID:22317664

Milani, Daniela; Monteiro, Maria Silvia

2012-01-01

303

Compartmentalization of the protein repair machinery in photosynthetic membranes.  

PubMed

A crucial component of protein homeostasis in cells is the repair of damaged proteins. The repair of oxygen-evolving photosystem II (PS II) supercomplexes in plant chloroplasts is a prime example of a very efficient repair process that evolved in response to the high vulnerability of PS II to photooxidative damage, exacerbated by high-light (HL) stress. Significant progress in recent years has unraveled individual components and steps that constitute the PS II repair machinery, which is embedded in the thylakoid membrane system inside chloroplasts. However, an open question is how a certain order of these repair steps is established and how unwanted back-reactions that jeopardize the repair efficiency are avoided. Here, we report that spatial separation of key enzymes involved in PS II repair is realized by subcompartmentalization of the thylakoid membrane, accomplished by the formation of stacked grana membranes. The spatial segregation of kinases, phosphatases, proteases, and ribosomes ensures a certain order of events with minimal mutual interference. The margins of the grana turn out to be the site of protein degradation, well separated from active PS II in grana core and de novo protein synthesis in unstacked stroma lamellae. Furthermore, HL induces a partial conversion of stacked grana core to grana margin, which leads to a controlled access of proteases to PS II. Our study suggests that the origin of grana in evolution ensures high repair efficiency, which is essential for PS II homeostasis. PMID:25331882

Puthiyaveetil, Sujith; Tsabari, Onie; Lowry, Troy; Lenhert, Steven; Lewis, Robert R; Reich, Ziv; Kirchhoff, Helmut

2014-11-01

304

Condition monitoring of machinery using motor current signature analysis  

SciTech Connect

Motor current signature analysis (MCSA) is a powerful monitoring tool for motor-driven equipment that provides a nonintrusive means for detecting the presence of mechanical and electrical abnormalities in the motor and the driven equipment, including altered conditions in the process ''downstream'' of the motor-driven equipment. It was developed at the Oak Ridge National Laboratory as a means for determining the effects of aging and service wear systems, but it is applicable to a broad range of machinery. MCSA is based on the recognition that an electric motor (ac or dc) driving a mechanical load acts as an efficient and permanently available transducer by sensing mechanical load variations, large and small, long-term and rapid, and converting them into variations in the induced current generated in the motor windings. These motor current variations are carried by the electrical cables processes as desired. Motor current signatures, obtained in both time and over time to provide early indication of degradation. Successful applications of MCSA technology (patent applied for) include not only motor-operated valves but also pumps of various designs, blowers, and air conditioning systems. Examples are presented briefly, and speculation regarding the applicability of MCSA to a broader range of equipment monitoring and production line testing is also given. 1 ref., 13 figs.

Kryter, R.C.; Haynes, H.D.

1989-01-01

305

Targeting the nuclear transport machinery by rational drug design.  

PubMed

CRM1 (also referred as exportin1 or Xpo1) is a key member of the importin ? superfamily of nuclear transport receptors. Its potential as therapeutic target has attracted significant attention in recent years. CRM1 controls the transport of a number of growth regulatory proteins and tumor suppressor proteins including p53, p21, FOXO, PI3K/AKT, Wnt/ß-catenin, AP-1 and NF-kB etc. The overexpression of CRM1 has been found to correlate with a variety of neoplastic conditions such as pancreatic and liver cancer. In addition, CRM1 could mediate the transport of viral proteins such as Rev, an essential factor protein for HIV replication. Moreover, CRM1 has been implicated in key steps of mitosis during cell cycles. Over the past years, the in-depth biological studies have rendered CRM1 as a promising clinical target. The interference of CRM1-mediated transport machinery could lead to the effective treatment of a variety of human disease related to cell proliferation. The aim of this paper is to summarize the research progress of CRM1 inhibitors in the late 30 years. More importantly, we want to provide new insights for the CRM1 drug design from the perspective of molecular simulation. PMID:23082981

Mao, Lei; Yang, Yongliang

2013-01-01

306

Radiation survey of aircraft and heavy machinery scrap.  

PubMed

This study was conducted primarily to survey aircraft and heavy machinery at 30 locations within Khartoum State using handheld radiation survey meters to detect and identify any radiation sources that might be present and to estimate radiation dose levels. The survey has resulted in detection of 16 sealed sources of (90)Sr and one of (226)Ra in aircraft scrap. Of course, (90)Sr sources are used in military aircraft as temperature sensors while (226)Ra is used for indicating fuel levels. These sources were found intact without spreading radioactivity contamination; however, none was detected in heavy machine scrap. The levels of radiation dose measured at 0.1m from the source fall within the range of 25.1-40.2 ?Sv/h with an average value of 33.52 ± 4.06 ?Sv/h. These orphan sources have been separated from the scrap, tested for possible leakage, conditioned and stored in waste management facility. The result of this study has revealed without doubt that the scrap constitute a serious source of public exposure and highlights the importance of legislation making radiation monitoring of scrap in the country mandatory before it is sold to metal industry for reprocessing. PMID:23041388

Idriss, Hajo; Salih, Isam; Gumaa, Elsadig; Yassin, Abbas; Yousif, E H; Abdel Hamid, Saad Eldeen M; Sam, A K

2012-12-01

307

AN INVESTIGATION OF THE TRAINING AND SKILL REQUIREMENTS OF INDUSTRIAL MACHINERY MAINTENANCE WORKERS. VOLUME I. FINAL REPORT.  

ERIC Educational Resources Information Center

DRAMATIC CHANGES IN THE CHARACTERISTICS AND COMPLEXITY OF PRODUCTION MACHINERY AND EQUIPMENT HAVE CREATED A GROWING NEED FOR ADEQUATELY TRAINED AND SKILLED MACHINERY MAINTENANCE WORKERS IN INDUSTRY. THIS STUDY DEFINED THE CHARACTERISTICS OF THE LABOR MARKET FOR MACHINERY MAINTENANCE WORKERS SUCH AS MILLWRIGHTS, MECHANICAL HYDRAULIC, ELECTRICAL,…

LYNN, FRANK

308

Sodium and Potassium  

MedlinePLUS

... Release 17 and recent manufacturers’ label data from retail market surveys. Serving sizes were standardized to be ... sodium content for selected foods available in the retail market This table is provided to show the ...

309

Sodium Phosphate Rectal  

MedlinePLUS

... the contents. To prepare this dose, unscrew the cap of the bottle and remove 2 tablespoons of ... using a measuring spoon. Then replace the bottle cap.To use the sodium phosphate enema, follow these ...

310

Molecular building blocks and their architecture in biologically/environmentally compatible soft matter chemical machinery.  

PubMed

This review briefly summarizes recent developments in the construction of biologically/environmentally compatible chemical machinery composed of soft matter. Since environmental and living systems are open systems, chemical machinery must continuously fulfill its functions not only through the influx and generation of molecules but also via the degradation and dissipation of molecules. If the degradation or dissipation of soft matter molecular building blocks and biomaterial molecules/polymers can be achieved, soft matter particles composed of them can be used to realize chemical machinery such as selfpropelled droplets, drug delivery carriers, tissue regeneration scaffolds, protocell models, cell-/tissuemarkers, and molecular computing systems. PMID:25341502

Toyota, Taro; Banno, Taisuke; Nitta, Sachiko; Takinoue, Masahiro; Nomoto, Tomonori; Natsume, Yuno; Matsumura, Shuichi; Fujinami, Masanori

2014-10-30

311

Data processing by the chemotaxis machinery of Escherichia coli  

Microsoft Academic Search

THE chemotactic behaviour of Escherichia coli provides a useful model for study of the molecular basis of a simple stimulus-response sequence1. Chemical stimuli are detected by specific receptors2 which in turn alter the rotation of the flagella3 to elicit movement towards attractants or away from repellents. About twenty types of chemoreceptors have been identified in E. coli4-6, suggesting that a

John S. Parkinson

1974-01-01

312

Power Harvesting from Rotation?  

ERIC Educational Resources Information Center

We show the impossibility of harvesting power from rotational motions by devices attached to the rotating object. The presentation is suitable for students who have studied Lagrangian mechanics. (Contains 2 figures.)

Chicone, Carmen; Feng, Z. C.

2008-01-01

313

Rotator Cuff Pathology  

MedlinePLUS

... Hand Anatomy Find a Hand Surgeon Rotator Cuff Pathology Email to a friend * required fields From * To * ... locking and a feeling of instability. Rotator cuff pathology ranges from a normal, asymptomatic aging process to ...

314

Physclips: Rotation, torques, precession  

NSDL National Science Digital Library

This web page provides a multimedia introduction to rotation. It includes topics such as rotational kinetic energy, rotational kinematics, moment of inertia, torques, Newton's laws for rotation, and angular momentum. Short video clips, still images, graphs, and diagrams are integrated with text to promote understanding of important concepts. This tutorial is part of the PhysClip collection of web-based resources on introductory mechanics, electricity, and magnetism.

Wolfe, Joe

2009-06-19

315

40 CFR 415.170 - Applicability; description of the sodium dichromate and sodium sulfate production subcategory.  

...Applicability; description of the sodium dichromate and sodium sulfate production subcategory...MANUFACTURING POINT SOURCE CATEGORY Sodium Dichromate and Sodium Sulfate Production Subcategory...Applicability; description of the sodium dichromate and sodium sulfate production...

2014-07-01

316

Predictors of human rotation  

Microsoft Academic Search

Why some humans prefer to rotate clockwise rather than anticlockwise is not well understood. This study aims to identify the predictors of the preferred rotation direction in humans. The variables hypothesised to influence rotation preference include handedness, footedness, sex, brain hemisphere lateralisation, and the Coriolis effect (which results from geospatial location on the Earth). An online questionnaire allowed us to

Jan Stochl; Tim Croudace

2012-01-01

317

Rotations with Rodrigues' Vector  

ERIC Educational Resources Information Center

The rotational dynamics was studied from the point of view of Rodrigues' vector. This vector is defined here by its connection with other forms of parametrization of the rotation matrix. The rotation matrix was expressed in terms of this vector. The angular velocity was computed using the components of Rodrigues' vector as coordinates. It appears…

Pina, E.

2011-01-01

318

Selenocysteine biosynthesis and insertion machinery in Naegleria gruberi.  

PubMed

Selenium (Se) is an essential trace element primarily found in selenoproteins as the 21st amino acid (selenocysteine, Sec, or U). Selenoproteins play an important role in growth and proliferation and are typically involved in cellular redox balance. Selenocysteine is encoded by an in-frame UGA codon specified by a stem-loop structure, the Sec insertion sequence element (SECIS), which, in eukaryotes, is located in the 3'-untranslated region (UTR). The availability of the Naegleria gruberi (ATCC 30224) genome sequence and the use of this organism as a model system for the pathogenic amoeba N. fowleri allowed us to investigate the Sec incorporation pathway in this primitive eukaryote. Using bioinformatics tools, we identified gene sequences encoding PSTK (O-phosphoseryl-tRNA(Sec) kinase), SepSecS (O-phosphoseryl-tRNA:selenocysteinyl-tRNA synthase), SelD/SPS2 (selenophosphate synthetase), EFSec (selenocysteine-specific elongation factor) and SBP (SECIS binding protein). These findings were confirmed by RT-PCR and by sequencing. A potential tRNA(Ser)Sec (SelC) gene and a putative selenoprotein with sequence similarity to a mitochondrial thioredoxin reductase (TR3) were also identified. Our results show that the selenocysteine incorporation machinery is indeed present in N. gruberi. Interestingly, the SelD/SPS2 gene is 2214 bp in length and contains two distinct domains. The N-terminal region shows sequence similarity to predicted methyltransferase proteins, and the C-terminal region is homologous to prokaryotic SelD/SPS2. Our results suggest the possibility of novel selenoproteins. PMID:23603359

da Silva, M T A; Caldas, V E A; Costa, F C; Silvestre, D A M M; Thiemann, O H

2013-04-01

319

Structural Characterization of the Bacteriophage T7 Tail Machinery*?  

PubMed Central

Most bacterial viruses need a specialized machinery, called “tail,” to inject their genomes inside the bacterial cytoplasm without disrupting the cellular integrity. Bacteriophage T7 is a well characterized member of the Podoviridae family infecting Escherichia coli, and it has a short noncontractile tail that assembles sequentially on the viral head after DNA packaging. The T7 tail is a complex of around 2.7 MDa composed of at least four proteins as follows: the connector (gene product 8, gp8), the tail tubular proteins gp11 and gp12, and the fibers (gp17). Using cryo-electron microscopy and single particle image reconstruction techniques, we have determined the precise topology of the tail proteins by comparing the structure of the T7 tail extracted from viruses and a complex formed by recombinant gp8, gp11, and gp12 proteins. Furthermore, the order of assembly of the structural components within the complex was deduced from interaction assays with cloned and purified tail proteins. The existence of common folds among similar tail proteins allowed us to obtain pseudo-atomic threaded models of gp8 (connector) and gp11 (gatekeeper) proteins, which were docked into the corresponding cryo-EM volumes of the tail complex. This pseudo-atomic model of the connector-gatekeeper interaction revealed the existence of a common molecular architecture among viruses belonging to the three tailed bacteriophage families, strongly suggesting that a common molecular mechanism has been favored during evolution to coordinate the transition between DNA packaging and tail assembly. PMID:23884409

Cuervo, Ana; Pulido-Cid, Mar; Chagoyen, Monica; Arranz, Rocio; Gonzalez-Garcia, Veronica A.; Garcia-Doval, Carmela; Caston, Jose R.; Valpuesta, Jose M.; van Raaij, Mark J.; Martin-Benito, Jaime; Carrascosa, Jose L.

2013-01-01

320

Modeling Integrated Cellular Machinery Using Hybrid Petri-Boolean Networks  

PubMed Central

The behavior and phenotypic changes of cells are governed by a cellular circuitry that represents a set of biochemical reactions. Based on biological functions, this circuitry is divided into three types of networks, each encoding for a major biological process: signal transduction, transcription regulation, and metabolism. This division has generally enabled taming computational complexity dealing with the entire system, allowed for using modeling techniques that are specific to each of the components, and achieved separation of the different time scales at which reactions in each of the three networks occur. Nonetheless, with this division comes loss of information and power needed to elucidate certain cellular phenomena. Within the cell, these three types of networks work in tandem, and each produces signals and/or substances that are used by the others to process information and operate normally. Therefore, computational techniques for modeling integrated cellular machinery are needed. In this work, we propose an integrated hybrid model (IHM) that combines Petri nets and Boolean networks to model integrated cellular networks. Coupled with a stochastic simulation mechanism, the model simulates the dynamics of the integrated network, and can be perturbed to generate testable hypotheses. Our model is qualitative and is mostly built upon knowledge from the literature and requires fine-tuning of very few parameters. We validated our model on two systems: the transcriptional regulation of glucose metabolism in human cells, and cellular osmoregulation in S. cerevisiae. The model produced results that are in very good agreement with experimental data, and produces valid hypotheses. The abstract nature of our model and the ease of its construction makes it a very good candidate for modeling integrated networks from qualitative data. The results it produces can guide the practitioner to zoom into components and interconnections and investigate them using such more detailed mathematical models. PMID:24244124

Berestovsky, Natalie; Zhou, Wanding; Nagrath, Deepak; Nakhleh, Luay

2013-01-01

321

The Actomyosin Machinery Is Required for Drosophila Retinal Lumen Formation  

PubMed Central

Multicellular tubes consist of polarized cells wrapped around a central lumen and are essential structures underlying many developmental and physiological functions. In Drosophila compound eyes, each ommatidium forms a luminal matrix, the inter-rhabdomeral space, to shape and separate the key phototransduction organelles, the rhabdomeres, for proper visual perception. In an enhancer screen to define mechanisms of retina lumen formation, we identified Actin5C as a key molecule. Our results demonstrate that the disruption of lumen formation upon the reduction of Actin5C is not linked to any discernible defect in microvillus formation, the rhabdomere terminal web (RTW), or the overall morphogenesis and basal extension of the rhabdomere. Second, the failure of proper lumen formation is not the result of previously identified processes of retinal lumen formation: Prominin localization, expansion of the apical membrane, or secretion of the luminal matrix. Rather, the phenotype observed with Actin5C is phenocopied upon the decrease of the individual components of non-muscle myosin II (MyoII) and its upstream activators. In photoreceptor cells MyoII localizes to the base of the rhabdomeres, overlapping with the actin filaments of the RTW. Consistent with the well-established roll of actomyosin-mediated cellular contraction, reduction of MyoII results in reduced distance between apical membranes as measured by a decrease in lumen diameter. Together, our results indicate the actomyosin machinery coordinates with the localization of apical membrane components and the secretion of an extracellular matrix to overcome apical membrane adhesion to initiate and expand the retinal lumen. PMID:25233220

Nie, Jing; Mahato, Simpla; Zelhof, Andrew C.

2014-01-01

322

49 CFR 393.130 - What are the rules for securing heavy vehicles, equipment and machinery?  

Code of Federal Regulations, 2010 CFR

...securing heavy vehicles, equipment and machinery? 393.130 Section 393.130 Transportation Other Regulations Relating...Specific Securement Requirements by Commodity Type § 393.130 What are the rules for securing heavy...

2010-10-01

323

19. PWD Drawing 1123918 (814M9) (1951), 'Machinery Cleaning Bldg., Building ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

19. PWD Drawing 11239-18 (814-M-9) (1951), 'Machinery Cleaning Bldg., Building No. 814, Ventilation' - Mare Island Naval Shipyard, Chemical Cleaning Facility, North of Fourteenth Street, between California & Railroad Avenue, Vallejo, Solano County, CA

324

11. PWD Drawing 11,23981 (814C2) (1944), 'Battle Damage Machinery Cleaning ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. PWD Drawing 11,239-81 (814-C-2) (1944), 'Battle Damage Machinery Cleaning Bldg., Bldg 814, Pile Record' - Mare Island Naval Shipyard, Chemical Cleaning Facility, North of Fourteenth Street, between California & Railroad Avenue, Vallejo, Solano County, CA

325

30 CFR 77.404 - Machinery and equipment; operation and maintenance.  

...HEALTH MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES Safeguards for Mechanical Equipment § 77.404 Machinery and equipment; operation and maintenance. (a) Mobile and stationary...

2014-07-01

326

30 CFR 77.404 - Machinery and equipment; operation and maintenance.  

Code of Federal Regulations, 2012 CFR

...HEALTH MANDATORY SAFETY STANDARDS, SURFACE COAL MINES AND SURFACE WORK AREAS OF UNDERGROUND COAL MINES Safeguards for Mechanical Equipment § 77.404 Machinery and equipment; operation and maintenance. (a) Mobile and stationary...

2012-07-01

327

46 CFR 153.233 - Separation of tanks from machinery, service and other spaces.  

Code of Federal Regulations, 2011 CFR

...joint: (1) Machinery spaces. (2) Service spaces. (3) Accommodation spaces. (4) Spaces for storing potable domestic, or feed water. (5) Spaces for storing edibles. (b) Some examples of arrangements that may separate...

2011-10-01

328

46 CFR 153.233 - Separation of tanks from machinery, service and other spaces.  

Code of Federal Regulations, 2010 CFR

...joint: (1) Machinery spaces. (2) Service spaces. (3) Accommodation spaces. (4) Spaces for storing potable domestic, or feed water. (5) Spaces for storing edibles. (b) Some examples of arrangements that may separate...

2010-10-01

329

46 CFR 153.233 - Separation of tanks from machinery, service and other spaces.  

Code of Federal Regulations, 2013 CFR

...joint: (1) Machinery spaces. (2) Service spaces. (3) Accommodation spaces. (4) Spaces for storing potable domestic, or feed water. (5) Spaces for storing edibles. (b) Some examples of arrangements that may separate...

2013-10-01

330

46 CFR 153.233 - Separation of tanks from machinery, service and other spaces.  

Code of Federal Regulations, 2012 CFR

...joint: (1) Machinery spaces. (2) Service spaces. (3) Accommodation spaces. (4) Spaces for storing potable domestic, or feed water. (5) Spaces for storing edibles. (b) Some examples of arrangements that may separate...

2012-10-01

331

49 CFR 173.222 - Dangerous goods in equipment, machinery or apparatus.  

Code of Federal Regulations, 2011 CFR

...the machinery or apparatus contains more than one hazardous material...the package, when a package contains hazardous materials in two or more of the categories in...by aircraft, when a package contains hazardous materials in...

2011-10-01

332

46 CFR 196.15-15 - Examination of boilers and machinery.  

Code of Federal Regulations, 2010 CFR

...Section 196.15-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS OPERATIONS Test, Drills, and Inspections § 196.15-15 Examination of boilers and machinery. (a) It...

2010-10-01

333

46 CFR 169.629 - Compartments containing gasoline machinery or fuel tanks.  

Code of Federal Regulations, 2013 CFR

...machinery or fuel tanks must have natural supply and mechanical exhaust ventilation meeting the requirements of American Boat and Yacht Council Standard H-2.5, “Design and Construction; Ventilation of Boats Using...

2013-10-01

334

46 CFR 169.629 - Compartments containing gasoline machinery or fuel tanks.  

Code of Federal Regulations, 2010 CFR

...machinery or fuel tanks must have natural supply and mechanical exhaust ventilation meeting the requirements of American Boat and Yacht Council Standard H-2.5, “Design and Construction; Ventilation of Boats Using...

2010-10-01

335

46 CFR 169.629 - Compartments containing gasoline machinery or fuel tanks.  

Code of Federal Regulations, 2011 CFR

...machinery or fuel tanks must have natural supply and mechanical exhaust ventilation meeting the requirements of American Boat and Yacht Council Standard H-2.5, “Design and Construction; Ventilation of Boats Using...

2011-10-01

336

46 CFR 169.629 - Compartments containing gasoline machinery or fuel tanks.  

Code of Federal Regulations, 2012 CFR

...machinery or fuel tanks must have natural supply and mechanical exhaust ventilation meeting the requirements of American Boat and Yacht Council Standard H-2.5, “Design and Construction; Ventilation of Boats Using...

2012-10-01

337

46 CFR 62.50-20 - Additional requirements for minimally attended machinery plants.  

Code of Federal Regulations, 2012 CFR

...62.50-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING VITAL SYSTEM AUTOMATION Automated Self-propelled Vessel Manning § 62.50-20 Additional requirements for minimally attended machinery...

2012-10-01

338

46 CFR 62.50-20 - Additional requirements for minimally attended machinery plants.  

Code of Federal Regulations, 2013 CFR

...62.50-20 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING VITAL SYSTEM AUTOMATION Automated Self-propelled Vessel Manning § 62.50-20 Additional requirements for minimally attended machinery...

2013-10-01

339

Accelerated Capabilities Initiative Condition-Based Maintenance: Machinery Diagnostics/Prognostics II.  

National Technical Information Service (NTIS)

Machinery diagnostics and prognostics is an enabling technology for preventing equipment operational failures, reducing maintenance costs and improving system design. The Navy is currently investigating the impact of this technology for shipboard applicat...

L. D. Johnson, T. A. Merdes

2005-01-01

340

Optimal Dynamic Management of Exploitation Life of the Mining Machinery: Models with Undefined Interval  

Microsoft Academic Search

The paper is focused on the problem of determining the optimal exploitation life of the long-lasting mining machinery, such\\u000a as bucket-wheel excavators, excavators with one working element of large capacity, spreaders, self-propelled transporters,\\u000a conveyor belts and similar machinery. A concept of approach is presented, and an application of the dynamic model with the\\u000a undefined interval is given by using the

S. Vujic; I. Miljanovic; S. Maksimovic; A. Milutinovic; T. Benovic; M. Hudej; B. Dimitrijevic; V. Cebasek; G. Gajic

2010-01-01

341

EVALUATION OF FORESTRY MACHINERY PERFORMANCE IN HARVESTING OPERATIONS USING GPS TECHNOLOGY  

Microsoft Academic Search

A study aiming at defining the best technology, and its limitations, in Global Positioning Systems, for monitoring machinery involved in the various forestry processes. Hence, a Thales-brand GPS device was integrated with a KS-73 PC, with an AMD Elan, 66Mhz processor. This unit was installed on harvesting machinery, specifically on cut-to-length (Harvester-Forwarder) and full-tree (Fellerbuncher-Grapple Skidder) systems. The results obtained,

Ronald Cordero; Oscar Mardones; Mauricio Marticorena

342

R&D Spillovers: Evidence from U.S. Food Processing, Farm Machinery and Agricultural Sectors  

Microsoft Academic Search

This paper computes private and social rates of return to R&D capital in the three vertically linked sectors, primary agriculture, food processing, and the farm machinery in the United States. Using a cost function approach, the private rates of return to R&D ranged from an average of 21.5% per annum for farm machinery to 87.5% for agriculture. The social rates

Munisamy Gopinath; Terry L. Roe

2000-01-01

343

Predictors of human rotation.  

PubMed

Why some humans prefer to rotate clockwise rather than anticlockwise is not well understood. This study aims to identify the predictors of the preferred rotation direction in humans. The variables hypothesised to influence rotation preference include handedness, footedness, sex, brain hemisphere lateralisation, and the Coriolis effect (which results from geospatial location on the Earth). An online questionnaire allowed us to analyse data from 1526 respondents in 97 countries. Factor analysis showed that the direction of rotation should be studied separately for local and global movements. Handedness, footedness, and the item hypothesised to measure brain hemisphere lateralisation are predictors of rotation direction for both global and local movements. Sex is a predictor of the direction of global rotation movements but not local ones, and both sexes tend to rotate clockwise. Geospatial location does not predict the preferred direction of rotation. Our study confirms previous findings concerning the influence of handedness, footedness, and sex on human rotation; our study also provides new insight into the underlying structure of human rotation movements and excludes the Coriolis effect as a predictor of rotation. PMID:22708777

Stochl, Jan; Croudace, Tim

2013-05-01

344

Apoptotic machinery diversity in multiple myeloma molecular subtypes.  

PubMed

Multiple myeloma (MM) is a plasma-cell (PC) malignancy that is heterogeneous in its clinical presentation and prognosis. Monoclonal gammopathy of undetermined significance (MGUS) consistently preceded development of MM. The presence of primary IgH translocations and the universal overexpression of cyclin D genes led to a molecular classification of MM patients into different disease subtypes. Since Bcl-2 family proteins determine cell fate, we analyzed a publicly available Affymetrix gene expression of 44 MGUS and 414 newly diagnosed MM patients to investigate (1) the global change of Bcl-2 family members in MM versus MGUS (2) whether the four major subtypes defined as hyperdiploid, CyclinD1, MAF, and MMSET, display specific apoptotic machineries. We showed that among the main anti-apoptotic members (Bcl-2, Bcl-xL, and Mcl-1), Mcl-1 up-regulation discriminated MM from MGUS, in agreement with the prominent role of Mcl-1 in PC differentiation. Surprisingly, the expression of multi-domain pro-apoptotic Bak and Bax were increased during the progression of MGUS to MM. The combined profile of Bcl-2, Bcl-xL, and Mcl-1 was sufficient to distinguish MM molecular groups. While specific pro-apoptotic members expression was observed for each MM subtypes, CyclinD1 subgroup, was identified as a particular entity characterized by a low expression of BH3-only (Puma, Bik, and Bad) and multi-domain pro-apoptotic members (Bax and Bak). Our analysis supports the notion that MM heterogeneity is extended to the differential expression of the Bcl-2 family content in each MM subgroup. The influence of Bcl-2 family profile in the survival of the different patient groups will be further discussed to establish the potential consequences for therapeutic interventions. Finally, the use of distinct pro-survival members in the different steps of immune responses to antigen raises also the question of whether the different Bcl-2 anti-apoptotic profile could reflect a different origin of MM cells. PMID:24391642

Gomez-Bougie, Patricia; Amiot, Martine

2013-01-01

345

Cellular calcium regulatory machinery of vasorelaxation elicited by petasin.  

PubMed

1. The present study examined the cytosolic Ca(2+) regulatory machinery involved in the vasorelaxation produced by petasin, a sesquiterpene isolated from Petasites formosanus. 2. Aortic rings isolated from Sprague-Dawley rats were exposed to petasin (0.01-100 micromol/L) to elucidate its vascular effects on isometric contraction elicited by vasoconstrictors, as well as the contribution of the endothelium and Ca(2+) to the responses observed. In addition, L-type voltage-dependent Ca(2+) channel (VDCC) activity and [Ca(2+)](i) were determined in cultured vascular smooth muscle cells (VSMCs) from Sprague-Dawley rats in the presence of 1-100 micromol/L petasin using whole-cell patch-clamp recording and the fluorescent probe fura-2/AM. The effects of petasin on vascular responses were compared between aortic rings from spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto (WKY) rats. 3. Petasin reduced isometric contraction elicited by KCl or the L-type Ca(2+) channel opener BayK 8644 (IC(50) 3.0 +/- 0.4 and 4.1 +/- 1.1 micromol/L, respectively) in aortic rings isolated from Sprague-Dawley rats, independent of the endothelium. In addition, petasin triggered a rightward shift in the concentration-response curve to KCl while reducing the maximal response by 82%. In Ca(2+)-depleted and high K(+)-depolarized aortic rings, 1-100 micromol/L petasin pretreatment attenuated the Ca(2+)-induced contraction in a concentration-dependent manner. 4. In cultured VSMCs, whole-cell patch-clamp recording revealed that petasin inhibited VDCC activity. Measurement of [Ca(2+)](i) using fura-2/AM fluorescence indicated that petasin suppressed the KCl-induced increase in [Ca(2+)](i). However, receptor binding assays failed to identify any significant interaction between petasin and the dihydropyridine binding sites of the L-type VDCC. 5. In aortic rings from SHR and WKY rats, petasin inhibited Ca(2+)-induced contractions in Ca(2+)-depleted and high K(+)-depolarized solution with a more pronounced effect in rings from SHR. 6. Together, the results suggest that direct Ca(2+) antagonism of L-type VDCC in vascular smooth muscle may account, at least in part, for petasin-induced vasorelaxation. The more pronounced effect of the sesquiterpene in blood vessels from SHR suggests its possible therapeutic potential in the mangement of hypertension. PMID:19719750

Wang, Guei-Jane; Lin, Yun-Lian; Chen, Chu-Huang; Wu, Xi-Chen; Liao, Jyh-Fei; Ren, Jun

2010-03-01

346

The bacterial actin MreB rotates, and rotation depends on cell-wall assembly  

PubMed Central

Bacterial cells possess multiple cytoskeletal proteins involved in a wide range of cellular processes. These cytoskeletal proteins are dynamic, but the driving forces and cellular functions of these dynamics remain poorly understood. Eukaryotic cytoskeletal dynamics are often driven by motor proteins, but in bacteria no motors that drive cytoskeletal motion have been identified to date. Here, we quantitatively study the dynamics of the Escherichia coli actin homolog MreB, which is essential for the maintenance of rod-like cell shape in bacteria. We find that MreB rotates around the long axis of the cell in a persistent manner. Whereas previous studies have suggested that MreB dynamics are driven by its own polymerization, we show that MreB rotation does not depend on its own polymerization but rather requires the assembly of the peptidoglycan cell wall. The cell-wall synthesis machinery thus either constitutes a novel type of extracellular motor that exerts force on cytoplasmic MreB, or is indirectly required for an as-yet-unidentified motor. Biophysical simulations suggest that one function of MreB rotation is to ensure a uniform distribution of new peptidoglycan insertion sites, a necessary condition to maintain rod shape during growth. These findings both broaden the view of cytoskeletal motors and deepen our understanding of the physical basis of bacterial morphogenesis. PMID:21903929

van Teeffelen, Sven; Wang, Siyuan; Furchtgott, Leon; Huang, Kerwyn Casey; Wingreen, Ned S.; Shaevitz, Joshua W.; Gitai, Zemer

2011-01-01

347

Enhancement of signal denoising and multiple fault signatures detecting in rotating machinery using dual-tree complex wavelet transform  

NASA Astrophysics Data System (ADS)

In order to enhance the desired features related to some special type of machine fault, a technique based on the dual-tree complex wavelet transform (DTCWT) is proposed in this paper. It is demonstrated that DTCWT enjoys better shift invariance and reduced spectral aliasing than second-generation wavelet transform (SGWT) and empirical mode decomposition by means of numerical simulations. These advantages of the DTCWT arise from the relationship between the two dual-tree wavelet basis functions, instead of the matching of the used single wavelet basis function to the signal being analyzed. Since noise inevitably exists in the measured signals, an enhanced vibration signals denoising algorithm incorporating DTCWT with NeighCoeff shrinkage is also developed. Denoising results of vibration signals resulting from a crack gear indicate the proposed denoising method can effectively remove noise and retain the valuable information as much as possible compared to those DWT- and SGWT-based NeighCoeff shrinkage denoising methods. As is well known, excavation of comprehensive signatures embedded in the vibration signals is of practical importance to clearly clarify the roots of the fault, especially the combined faults. In the case of multiple features detection, diagnosis results of rolling element bearings with combined faults and an actual industrial equipment confirm that the proposed DTCWT-based method is a powerful and versatile tool and consistently outperforms SGWT and fast kurtogram, which are widely used recently. Moreover, it must be noted, the proposed method is completely suitable for on-line surveillance and diagnosis due to its good robustness and efficient algorithm.

Wang, Yanxue; He, Zhengjia; Zi, Yanyang

2010-01-01

348

Cylindrical rotating triboelectric nanogenerator.  

PubMed

We demonstrate a cylindrical rotating triboelectric nanogenerator (TENG) based on sliding electrification for harvesting mechanical energy from rotational motion. The rotating TENG is based on a core-shell structure that is made of distinctly different triboelectric materials with alternative strip structures on the surface. The charge transfer is strengthened with the formation of polymer nanoparticles on surfaces. During coaxial rotation, a contact-induced electrification and the relative sliding between the contact surfaces of the core and the shell result in an "in-plane" lateral polarization, which drives the flow of electrons in the external load. A power density of 36.9 W/m(2) (short-circuit current of 90 ?A and open-circuit voltage of 410 V) has been achieved by a rotating TENG with 8 strip units at a linear rotational velocity of 1.33 m/s (a rotation rate of 1000 r/min). The output can be further enhanced by integrating more strip units and/or applying larger linear rotational velocity. This rotating TENG can be used as a direct power source to drive small electronics, such as LED bulbs. This study proves the possibility to harvest mechanical energy by TENGs from rotational motion, demonstrating its potential for harvesting the flow energy of air or water for applications such as self-powered environmental sensors and wildlife tracking devices. PMID:23799926

Bai, Peng; Zhu, Guang; Liu, Ying; Chen, Jun; Jing, Qingshen; Yang, Weiqing; Ma, Jusheng; Zhang, Gong; Wang, Zhong Lin

2013-07-23

349

Sodium storage and injection system  

NASA Technical Reports Server (NTRS)

A sodium storage and injection system for delivering atomized liquid sodium to a chemical reactor employed in the production of solar grade silicon is disclosed. The system is adapted to accommodate start-up, shut-down, normal and emergency operations, and is characterized by (1) a jacketed injection nozzle adapted to atomize liquefied sodium and (2) a supply circuit connected to the nozzle for delivering the liquefied sodium. The supply circuit is comprised of a plurality of replaceable sodium containment vessels, a pump interposed between the vessels and the nozzle, and a pressurizing circuit including a source of inert gas connected with the vessels for maintaining the sodium under pressure.

Keeton, A. R. (inventor)

1979-01-01

350

Econometric analysis of farm-machinery investment and simulations under alternative energy, price support, and export policies  

SciTech Connect

The historical trends in structure, extent, and intensity of agricultural mechanization are analyzed in this study. The number of tractors, grain combines, corn pickers and picker shellers, pickup balers, and field forage harvesters peaked during the early 1960s. The decline in this numbers after the '60s is brought about mainly by the qualitative changes in those machines. Based on the various investments theories, the alternative models of stock adjustment, expectations, and derived demand type are estimated for tractor and other machinery investments at the national and regional levels using 1950 to 1977 annual data. Investment demand functions for harvesting machinery are estimated at the national level. Statistical tests for structural change in the machinery investments are performed. The demand elasticities with respect to prices, income and other economic variables are calculated. Dynamic multipliers expressing the long-lasting effects of the interest rates, price of fuel and oil, and net farm income are calculated for selected machinery investments. The impact and long-term multipliers are also presented. Finally, a block recursive simulation model of the regional farm-machinery investments is developed. The relevant variables are selected from agriculture, industry, and the economy in general to complete the linkages specified in the model. The regional tractor and other machinery investments and national tractor, harvesting-machinery, other machinery, and all machinery investments are predicted up to 1990. The potential effects of six alternative policies of energy prices, support prices, and agricultural exports on future farm-machinery investments are also analyzed.

Gunjal, K.R.

1981-01-01

351

21 CFR 178.3900 - Sodium pentachlorophenate.  

...Production Aids § 178.3900 Sodium pentachlorophenate. Sodium pentachlorophenate may be...the manufacture of polyvinyl chloride emulsion polymers intended...temperature. The quantity of sodium pentachlorophenate used...

2014-04-01

352

Reverse Engineering the Cooperative Machinery of Human Hemoglobin  

PubMed Central

Hemoglobin transports molecular oxygen from the lungs to all human tissues for cellular respiration. Its ?2?2 tetrameric assembly undergoes cooperative binding and releasing of oxygen for superior efficiency and responsiveness. Over past decades, hundreds of hemoglobin structures were determined under a wide range of conditions for investigation of molecular mechanism of cooperativity. Based on a joint analysis of hemoglobin structures in the Protein Data Bank (Ren, companion article), here I present a reverse engineering approach to elucidate how two subunits within each dimer reciprocate identical motions that achieves intradimer cooperativity, how ligand-induced structural signals from two subunits are integrated to drive quaternary rotation, and how the structural environment at the oxygen binding sites alter their binding affinity. This mechanical model reveals the intricate design that achieves the cooperative mechanism and has previously been masked by inconsistent structural fluctuations. A number of competing theories on hemoglobin cooperativity and broader protein allostery are reconciled and unified. PMID:24312167

Ren, Zhong

2013-01-01

353

Effect of conditions of three dimensional clinostating on testicular cell machinery  

NASA Astrophysics Data System (ADS)

Our scope was to study the effects of on ground random positioning machine rotation on swine testicular cells in culture. Cells of the 2n karyotype line, from trypsinized swine testes, were submitted to modeled microgravity (?G) using a 3D RPM from 15 min to 24 h. The cultured cells were then fixed and submitted to immunohistochemistry using antibodies to steroid dehydrogenases, heat shock proteins and the sodium pump (Na+/K+ ATPase). The results revealed that, after 15 min at modeled ?G, all the cells showed damages at cytoskeletal level. The immunoreactions for 3?HSD, 17?HSD and Na+/K+ ATPase were almost abolished. After 24 h of treatment, the presence of the enzymes was restored, and small heat shock proteins were strongly immunostainable. On the other hand, in the 1×G cultures, the expression of HSPs was very weak. We conclude that modeled ?G by random positioning of cells affects testicular cells in culture for a short time, while the normal activity of the cells is restored after 24 h.

Uva, Bianca Maria; Strollo, Felice; Ricci, Franco; Pastorino, Martina; Mason, Ian J.; Angela Masini, Maria

2007-02-01

354

Feasibility of vibration monitoring of small rotating machines for the environmental control and life support systems (ECLSS) of the NASA advanced space craft  

NASA Technical Reports Server (NTRS)

The application of vibration monitoring to the rotating machinery typical of ECLSS components in advanced NASA spacecraft was studied. It is found that the weighted summation of the accelerometer power spectrum is the most successful detection scheme for a majority of problem types. Other detection schemes studied included high-frequency demodulation, cepstrum, clustering, and amplitude processing.

Milner, G. Martin; Black, Mike; Hovenga, Mike; Mcclure, Paul; Miller, Patrice

1988-01-01

355

Hanford site sodium management plan  

SciTech Connect

The Hanford Site Sodium Management Plan, Revision 1, provides changes to the major elements and management strategy to ensure an integrated and coordinated approach for disposition of the more than 350,000 gallons of sodium and related sodium facilities located at the DOE`s Hanford Site

Guttenberg, S.

1995-09-25

356

Sodium Chloride (Catheter Flush) Injection  

MedlinePLUS

... use a sodium chloride flush several times a day. Your health care provider will determine the number of sodium chloride flushes you will need a day. ... health care provider probably will give you several days supply of sodium chloride. You will be told ...

357

Emergence and Modular Evolution of a Novel Motility Machinery in Bacteria  

PubMed Central

Bacteria glide across solid surfaces by mechanisms that have remained largely mysterious despite decades of research. In the deltaproteobacterium Myxococcus xanthus, this locomotion allows the formation stress-resistant fruiting bodies where sporulation takes place. However, despite the large number of genes identified as important for gliding, no specific machinery has been identified so far, hampering in-depth investigations. Based on the premise that components of the gliding machinery must have co-evolved and encode both envelope-spanning proteins and a molecular motor, we re-annotated known gliding motility genes and examined their taxonomic distribution, genomic localization, and phylogeny. We successfully delineated three functionally related genetic clusters, which we proved experimentally carry genes encoding the basal gliding machinery in M. xanthus, using genetic and localization techniques. For the first time, this study identifies structural gliding motility genes in the Myxobacteria and opens new perspectives to study the motility mechanism. Furthermore, phylogenomics provide insight into how this machinery emerged from an ancestral conserved core of genes of unknown function that evolved to gliding by the recruitment of functional modules in Myxococcales. Surprisingly, this motility machinery appears to be highly related to a sporulation system, underscoring unsuspected common mechanisms in these apparently distinct morphogenic phenomena. PMID:21931562

Le Gall, Anne Valerie; Wartel, Morgane; Fiegna, Francesca; Ducret, Adrien; Brochier-Armanet, Celine; Mignot, Tam

2011-01-01

358

Sodium hydride precipitation in sodium cold traps  

SciTech Connect

A series of experiments have been performed to test a calculational model for precipitation of NaH in sodium cold traps. The calculational model, called ACTMODEL, is a computer simulation that uses the system geometry and operating conditions as input to calculate a mass-transfer coefficient and the distribution of NaH in a cold trap. The ACTMODEL was tested using an analytical cold trap (ACT) that is simple and essentially one-dimensional. The ACT flow and temperature profile can be controlled at any desired condition. The ACT was analyzed destructively after each test to measure the actual NaH distribution. Excellent agreement was obtained between the ACTMODEL simulations and the experiments. Mass-transfer coefficients ranging upward from 6 x 10/sup -5/ m/s were measured in both packless and packed traps. As much as a fourfold increase in precipitation surface area was observed with increasing amount of NaH deposited. 11 figures, 2 tables.

McPheeters, C.C.; Raue, D.J.

1980-06-01

359

Rotation and polarization diversity  

Microsoft Academic Search

In this work, we propose and study the performance of a new transmit diversity technique called rotation and polarization diversity. In this technique, in-phase and quadrature components of the rotated symbols are transmitted over two different polarizations of polarized transmitted antenna. By this way, in-phase and quadrature components are affected by different fading coefficients. Error performance of the proposed technique

Ahmet Yilmaz; Oguz Kucur

2011-01-01

360

Diamagnetism of rotating plasma  

SciTech Connect

Diamagnetism and magnetic measurements of a supersonically rotating plasma in a shaped magnetic field demonstrate confinement of plasma pressure along the magnetic field resulting from centrifugal force. The Grad-Shafranov equation of ideal magnetohydrodynamic force balance, including supersonic rotation, is solved to confirm that the predicted angular velocity is in agreement with spectroscopic measurements of the Doppler shifts.

Young, W. C.; Hassam, A. B.; Romero-Talamas, C. A.; Ellis, R. F.; Teodorescu, C. [IREAP, University of Maryland, College Park, Maryland 20742 (United States)

2011-11-15

361

The aircraft rotation problem  

Microsoft Academic Search

Given a set of flights to be flown for a specific aircraft type, with specified maintenance locations, durations, and needed frequency, the aircraft rotation problem is to determine the specific route flown by each aircraft. The objective is to maximize the benefit derived from making specific connections. In this paper, we present a mathematical formulation for the aircraft rotation problem

Lloyd Clarke; Ellis Johnson; George Nemhauser; Zhongxi Zhu

1997-01-01

362

FORMULATION OF ROTATIONAL SYSTEMS  

E-print Network

, by formulating a rotational equivalent mass called "moment of inertia." 3.1 Newton's Law Revisited Let us begin Figure 3.2: Simple Pendulum with Torsion Spring for T to obtain Newton's law in units of torque: T = (mr2Chapter 3 FORMULATION OF ROTATIONAL SYSTEMS and review of second moments Many engineering problems

363

Mental Rotation Explanation  

NSDL National Science Digital Library

One of the most popular tasks used in measuring individual differences in spatial ability is a mental rotation task introduced by Shepard and Metzler (1971). This page provides information about use of a spatial ability task to illustrate the prinicple of mental rotation.

364

Low Sodium Diet (Beyond the Basics)  

MedlinePLUS

... ON SODIUM? Although it is difficult to abruptly cut back on the amount of sodium in the diet, ... taste adjusts quickly to reduced sodium if they cut back gradually. Fresh herbs, spice blends without sodium, citrus, ...

365

A Rotating Holographic Superconductor  

E-print Network

In this paper we initiate the study of SSB in 3+1 dimensional rotating, charged, asymptotically AdS black holes. The theory living on their boundary, R x S^2, has the interpretation of a 2+1 dimensional rotating holographic superconductor. We study the appearance of a marginal mode of the condensate as the temperature is decreased. We find that the transition temperature depends on the rotation. At temperatures just below T_c, the transition temperature at zero rotation, there exists a critical value of the rotation, which destroys the superconducting order. This behaviour is analogous to the emergence of a critical applied magnetic field and we show that the superconductor in fact produces the expected London field in the planar limit.

Julian Sonner

2009-03-03

366

Sodium disorders in the elderly.  

PubMed Central

Disorders of sodium imbalance are commonly encountered in clinical practice and can have a substantial impact on the prognosis of the patient. These disorders are more common in the elderly. Sodium disorders can cause serious neurologic symptoms and even death, particularly among hospitalized patients. The identification of sodium abnormalities and appropriate clinical intervention are critical for improving patient outcomes. Early recognition of hyponatremia and hypernatremia can provide a clue to an underlying disorder. In this update, we have summarized age-related homeostatic changes that impair sodium balance, medications that alter salt and water handling, and the recognition and management of sodium disorders in elderly patients. PMID:15712785

Tareen, Naureen; Martins, David; Nagami, Glenn; Levine, Barton; Norris, Keith C.

2005-01-01

367

Power electronics and electric machinery challenges and opportunities in electric and hybrid vehicles  

SciTech Connect

The development of power electronics and electric machinery presents significant challenges to the advancement of electric and hybrid vehicles. Electronic components and systems development for vehicle applications have progressed from the replacement of mechanical systems to the availability of features that can only be realized through interacting electronic controls and devices. Near-term applications of power electronics in vehicles will enable integrated powertrain controls, integrated chassis system controls, and navigation and communications systems. Future applications of optimized electric machinery will enable highly efficient and lightweight systems. This paper will explore the areas where research and development is required to ensure the continued development of power electronics and electric machines to meet the rigorous demands of automotive applications. Additionally, recent advances in automotive related power electronics and electric machinery at Oak Ridge National Laboratory will be explained. 3 refs., 5 figs.

Adams, D.J.; Hsu, J.S.; Young, R.W. [Oak Ridge National Lab., TN (United States); Peng, F.Z. [Univ. of Tennessee, Knoxville, TN (United States)

1997-06-01

368

Rotatable seal assembly. [Patent application; rotating targets  

DOEpatents

An assembly is provided for rotatably supporting a rotor on a stator so that vacuum chambers in the rotor and stator remain in communication while the chambers are sealed from ambient air, which enables the use of a ball bearing or the like to support most of the weight of the rotor. The apparatus includes a seal device mounted on the rotor to rotate therewith, but shiftable in position on the rotor while being sealed to the rotor as by an O-ring. The seal device has a flat face that is biased towards a flat face on the stator, and pressurized air is pumped between the faces to prevent contact between them while spacing them a small distance apart to avoid the inflow of large amounts of air between the faces and into the vacuum chambers.

Logan, C.M.; Garibaldi, J.L.

1980-11-12

369

Rotational Quantum Friction  

E-print Network

We investigate the frictional forces due to quantum fluctuations acting on a small sphere rotating near a surface. At zero temperature, we find the frictional force near a surface to be several orders of magnitude larger than that for the sphere rotating in vacuum. For metallic materials with typical conductivity, quantum friction is maximized by matching the frequency of rotation with the conductivity. Materials with poor conductivity are favored to obtain large quantum frictions. For semiconductor materials that are able to support surface plasmon polaritons, quantum friction can be further enhanced by several orders of magnitude due to the excitation of surface plasmon polaritons.

Rongkuo Zhao; Alejandro Manjavacas; F. Javier García de Abajo; J. B. Pendry

2012-08-21

370

Different mental rotation strategies reflected in the rotation related negativity.  

PubMed

In a mental rotation task of objects, typically, reaction time (RT) increases and the rotation related negativity (RRN) increases in amplitude with increasing angles of rotation. However, in a mental rotation task of hands, different RT profiles can be observed for outward and inward rotated hands. In the present study, we examined the neurophysiological correlates of these asymmetries in the RT profiles. We used a mental rotation task with stimuli of left and right hands. In line with previous studies, the behavioral results showed a linear increase in RT for outward rotations, but not for inward rotations as a function of angular disparity. Importantly, the ERP results revealed an RRN for outward rotated stimuli, but not for inward rotated stimuli. This is the first study to show that the behaviorally observed differences in a mental rotation task of hands is also reflected at the neurophysiological level. PMID:22091978

ter Horst, Arjan C; Jongsma, Marijtje L A; Janssen, Lieneke K; van Lier, Rob; Steenbergen, Bert

2012-04-01

371

Magnetometry with mesospheric sodium  

PubMed Central

Measurement of magnetic fields on the few 100-km length scale is significant for many geophysical applications including mapping of crustal magnetism and ocean circulation measurements, yet available techniques for such measurements are very expensive or of limited accuracy. We propose a method for remote detection of magnetic fields using the naturally occurring atomic sodium-rich layer in the mesosphere and existing high-power lasers developed for laser guide star applications. The proposed method offers a dramatic reduction in cost and opens the way to large-scale, parallel magnetic mapping and monitoring for atmospheric science, navigation, and geophysics. PMID:21321235

Higbie, James M.; Rochester, Simon M.; Patton, Brian; Holzlohner, Ronald; Bonaccini Calia, Domenico; Budker, Dmitry

2011-01-01

372

Rotator cuff problems  

MedlinePLUS

... 309-323. Matsen III FA, Fehringer EV, Lippitt SB, Wirth MA, Rockwood CA Jr. Rotator cuff. In: ... CA Jr, Matsen FA III, Wirth MA, Lippitt SB, eds. The Shoulder . 4th ed. Philadelphia, PA: Saunders ...

373

Rotating mobile launcher  

NASA Technical Reports Server (NTRS)

Apparatus holds remotely piloted arm that accelerates until launching speed is reached. Then vehicle and counterweight at other end of arm are released simultaneously to avoid structural damage from unbalanced rotating forces.

Gregory, T. J.

1977-01-01

374

The Earth's rotation problem  

NASA Astrophysics Data System (ADS)

The aim of the present paper is to find the trigonometric solution of the equations of the Earth's rotation around its centre of mass in the form of polynomial trigonometric series (Poisson series) without secular and mixed therms. For that the techniques of the General Planetary Theory (GPT) ( Brumberg, 1995) and the Poisson Series Processor (PSP) (Ivanova, 1995) are used. The GPT allows to reduce the equations of the translatory motion of the major planets and the Moon and the equations of the Earth's rotation in Euler parameters to the secular system describing the evolution of the planetary and lunar orbits (independent of the Earth's rotation) and the evolution of the Earth's rotation (depending on the planetary and lunar evolution).

Brumberg, V. A.; Ivanova, T. V.

2008-09-01

375

Synchronous Rotation of Moon  

NSDL National Science Digital Library

The representation is an animation of the moon's orbit around the Earth. This animation and accompanying text explain that the same side of the moon always faces Earth because of the moon's rotation. The animation begins with a demonstration of how the moon would appear if it did not rotate on its axis, and shows that all sides would be visible from Earth at some point in that orbit. The animation then shows the synchronous rotation of the moon and explains this rotation is the reason for our only seeing one side of the moon. The sun is shown at the right side of the diagram and the Earth and moon are shown with an illuminated side facing the sun and a dark side facing away from the sun. Colored "craters" on opposite sides of the moon are used as reference points for the animation.

376

Mental Rotation Experiment  

NSDL National Science Digital Library

This is the entry page for the Mental Rotation Experiment. This experiment presents 16 different pairs of three dimensional objects. Users judge whether the objects are the same or different. Responses are timed.

377

Rotator Cuff Repair  

MedlinePLUS Videos and Cool Tools

... Dr. Uribe's going to go up into this space. It's called the subacromial space, and that is where the rotator cuff repair ... flap of tissue, gets caught in that subacromial space Dr. Zvijac was talking about and that produces ...

378

Rotational vertebral artery syndrome  

Microsoft Academic Search

Whether the rotational vertebral artery syndrome (RVAS), consisting of attacks of vertigo, nystagmus and tinnitus elicited\\u000a by head-rotation induced compression of the dominant vertebral artery (VA), reflects ischemic dysfunction of uni- or bilateral\\u000a peripheral or central vestibular structures, is still debated. We report on a patient with bilateral high-grade carotid stenoses,\\u000a in whom rightward headrotation led to RVAS symptoms including

Sarah Marti; Stefan Hegemann; Hans-Christian von Büdingen; Ralf W. Baumgartner; Dominik Straumann

2008-01-01

379

Faraday rotation in graphene  

E-print Network

We study magneto--optical properties of monolayer graphene by means of quantum field theory methods in the framework of the Dirac model. We reveal a good agreement between the Dirac model and a recent experiment on giant Faraday rotation in cyclotron resonance. We also predict other regimes when the effects are well pronounced. The general dependence of the Faraday rotation and absorption on various parameters of samples is revealed both for suspended and epitaxial graphene.

I. V. Fialkovsky; D. V. Vassilevich

2012-03-20

380

The Physics of Rotation  

NSDL National Science Digital Library

This web site contains media-illustrated articles on various physical phenomena related to the Coriolis effect. Almost all of the articles are illustrated with animations and java simulations. The main subjects covered include the Coriolis and Centrifugal effects, rotation-vibration coupling, the consequences of Earth's rotation on oceanography and weather, the Foucault pendulum, and angular momentum conservation. There are also articles on the Eötvös effect and special and general relativity.

Teunissen, Cleon

2009-01-12

381

Electromagnetic rotational actuation.  

SciTech Connect

There are many applications that need a meso-scale rotational actuator. These applications have been left by the wayside because of the lack of actuation at this scale. Sandia National Laboratories has many unique fabrication technologies that could be used to create an electromagnetic actuator at this scale. There are also many designs to be explored. In this internship exploration of the designs and fabrications technologies to find an inexpensive design that can be used for prototyping the electromagnetic rotational actuator.

Hogan, Alexander Lee

2010-08-01

382

46 CFR 32.56-25 - Category A machinery spaces: Windows and port lights-T/ALL.  

Code of Federal Regulations, 2010 CFR

...Category A machinery spaces: Windows and port lights-T/ALL...Category A machinery spaces: Windows and port lights—T/ALL...pumprooms must not be pierced for windows or portlights. (b) Skylights...74-125A, 47 FR 15230, Apr. 8,...

2010-10-01

383

Automated function generation of symptom parameters and application to fault diagnosis of machinery under variable operating conditions  

Microsoft Academic Search

Dimensional or nondimensional symptom parameters are usually used for condition monitoring of plant machinery. However, it is difficult to extract the most important symptom parameters and the functions of those parameters by which machinery faults can be sensitively detected and the fault types can be precisely distinguished. In order to overcome this difficulty and to ensure highly accurate fault diagnosis,

Peng Chen; Toshio Toyota; Zhengja He

2001-01-01

384

Analysis of field machinery performance based on daily soil workability status using discrete event simulation or on average workday probability  

Microsoft Academic Search

The objective of the study was to develop a simulation model for field machinery operations using a discrete event simulation technique in order to analyse machinery performance based on daily status of soil workability for a series of years (Daily Work. method), and to compare the results with those from a simpler method based on average probability values of available

A. de Toro; P.-A. Hansson

2004-01-01

385

46 CFR 32.56-25 - Category A machinery spaces: Windows and port lights-T/ALL.  

Code of Federal Regulations, 2013 CFR

...false Category A machinery spaces: Windows and port lights-T/ALL. 32.56-25 Section 32.56-25 Shipping COAST...56-25 Category A machinery spaces: Windows and port lights—T/ALL. (a) Except as provided in paragraph (b) of...

2013-10-01

386

46 CFR 32.56-25 - Category A machinery spaces: Windows and port lights-T/ALL.  

Code of Federal Regulations, 2011 CFR

...false Category A machinery spaces: Windows and port lights-T/ALL. 32.56-25 Section 32.56-25 Shipping COAST...56-25 Category A machinery spaces: Windows and port lights—T/ALL. (a) Except as provided in paragraph (b) of...

2011-10-01

387

An Assessment of Selected Aspects of the Pre-Employment Program in Farm Machinery Service and Repair.  

ERIC Educational Resources Information Center

In an effort to evaluate certain aspects of the pre-employment program in farm machinery service and repair, questionnaires were sent to 39 Texas teachers of the programs. Based on 30 responses (76.92%), the major conclusions were: a majority of the teachers felt they did not have adequate training in farm machinery mechanics; no uniform selection…

Webb, Earl S.; Kruse, Robert F.

388

Research Paper: PMdPower and Machinery Estimating mean particle diameter in free-fall granular  

E-print Network

Research Paper: PMdPower and Machinery Estimating mean particle diameter in free-fall granular Available online 27 July 2008 The mean diameters of particles in a free-falling flow regime were estimated, grouped into 10 replicates taken at four different fall heights causing four different flow densities, 30

389

The Machinery of Management: Team Building (MM4). Workforce 2000 Partnership.  

ERIC Educational Resources Information Center

This curriculum package on team building--the machinery of management for supervisors, auditors, and training instructors has been developed by the Workforce 2000 Partnership, a network of industries and educational institutions that provides training in communication, computation, and creative thinking to employees and supervisors in textile,…

Enterprise State Junior Coll., AL.

390

The Machinery of Management: Communication II (MM1). Workforce 2000 Partnership.  

ERIC Educational Resources Information Center

This curriculum package on communication--the machinery of management for supervisors, auditors, and training instructors has been developed by the Workforce 2000 Partnership, a network of industries and educational institutions that provides training in communication, computation, and creative thinking to employees and supervisors in textile,…

Enterprise State Junior Coll., AL.

391

CHL1 Is a Selective Organizer of the Presynaptic Machinery Chaperoning the SNARE Complex  

PubMed Central

Proteins constituting the presynaptic machinery of vesicle release undergo substantial conformational changes during the process of exocytosis. While changes in the conformation make proteins vulnerable to aggregation and degradation, little is known about synaptic chaperones which counteract these processes. We show that the cell adhesion molecule CHL1 directly interacts with and regulates the activity of the synaptic chaperones Hsc70, CSP and ?SGT. CHL1, Hsc70, CSP and ?SGT form predominantly CHL1/Hsc70/?SGT and CHL1/CSP complexes in synapses. Among the various complexes formed by CHL1, Hsc70, CSP and ?SGT, SNAP25 and VAMP2 induce chaperone activity only in CHL1/Hsc70/?SGT and CHL1/CSP complexes, respectively, indicating a remarkable selectivity of a presynaptic chaperone activity for proteins of the exocytotic machinery. In mice with genetic ablation of CHL1, chaperone activity in synapses is reduced and the machinery for synaptic vesicle exocytosis and, in particular, the SNARE complex is unable to sustain prolonged synaptic activity. Thus, we reveal a novel role for a cell adhesion molecule in selective activation of the presynaptic chaperone machinery. PMID:20711454

Knepper, Michael; Betzel, Christian; Redecke, Lars; Schachner, Melitta

2010-01-01

392

Actin machinery and mechanosensitivity in invadopodia, podosomes and focal adhesions Corinne Albiges-Rizo  

E-print Network

Actin machinery and mechanosensitivity in invadopodia, podosomes and focal adhesions Corinne *Author for correspondence (corinne.albiges-rizo@ujf-grenoble.fr) Key words: Invadopodia, Podosomes, Actin is correlated with the presence of dynamic actin-rich membrane structures called invadopodia, which are membrane

Paris-Sud XI, Université de

393

18. PWD Drawing 1123915 (814M7) (1945), 'Machinery Cleaning Bldg., Bldg ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

18. PWD Drawing 11239-15 (814-M-7) (1945), 'Machinery Cleaning Bldg., Bldg No. 814, Fire Protection Automatic CO2 and Tank Cover Control' - Mare Island Naval Shipyard, Chemical Cleaning Facility, North of Fourteenth Street, between California & Railroad Avenue, Vallejo, Solano County, CA

394

Agricultural Machinery 01.0301 for Agribusiness, Natural Resources and Environmental Occupations.  

ERIC Educational Resources Information Center

The document presents unit plans which offer lists of experiences and competencies to be learned in the area of agricultural machinery for agribusiness, natural resources, and environmental occupations. The units include: (1) safety; (2) agricultural service center; (3) component parts--bearings, gears, pulleys, clutches, and others; (4) metal…

Wright, John; And Others

395

The ethylene biosynthetic and perception machinery is differentially expressed during endosperm and embryo development in maize  

Microsoft Academic Search

The maize endosperm undergoes programmed cell death late in its development so that, with the exception of the aleurone layer, the tissue is dead by the time the kernel matures. Although ethylene is known to regulate the onset of endosperm cell death, the temporal and spatial control of the ethylene biosynthetic and perception machinery during maize endosperm development has not

D. R. Gallie; T. E. Young

2004-01-01

396

DIESEL ENGINE SYSTEMS. AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS, MODULE NUMBER 15.  

ERIC Educational Resources Information Center

ONE OF A SERIES DESIGNED TO HELP TEACHERS PREPARE POSTSECONDARY STUDENTS FOR AGRICULTURAL MACHINERY SERVICE OCCUPATIONS AS PARTS MEN, MECHANICS, MECHANIC'S HELPERS, AND SERVICE SUPERVISORS, THIS GUIDE AIMS TO DEVELOP STUDENT UNDERSTANDING OF THE CONSTRUCTION AND OPERATING PRINCIPLES OF DIESEL ENGINES. IT WAS DEVELOPED BY A NATIONAL TASK FORCE ON…

Ohio State Univ., Columbus. Center for Vocational and Technical Education.

397

Comparison of different buffering topologies in FC-hybrid non-road mobile machineries  

Microsoft Academic Search

This paper presents powertrain comparison for fuel cell hybrid non-road mobile machinery. The objective of this study is to investigate the feasibility of different fuel cell hybrid powertrain topologies. This study concentrates on hybrid powertrain topologies which are generated from the fuel cell source output to loading inverters inputs. The compared features of different powertrains are efficiency, weight, size, cost

Matti Liukkonen; Antti Lajunen; Jussi Suomela

2011-01-01

398

Research on prediction of agricultural machinery total power based on grey model optimized by genetic algorithm  

NASA Astrophysics Data System (ADS)

Agricultural machinery total power is an important index to reflex and evaluate the level of agricultural mechanization. It is the power source of agricultural production, and is the main factors to enhance the comprehensive agricultural production capacity expand production scale and increase the income of the farmers. Its demand is affected by natural, economic, technological and social and other "grey" factors. Therefore, grey system theory can be used to analyze the development of agricultural machinery total power. A method based on genetic algorithm optimizing grey modeling process is introduced in this paper. This method makes full use of the advantages of the grey prediction model and characteristics of genetic algorithm to find global optimization. So the prediction model is more accurate. According to data from a province, the GM (1, 1) model for predicting agricultural machinery total power was given based on the grey system theories and genetic algorithm. The result indicates that the model can be used as agricultural machinery total power an effective tool for prediction.

Xie, Yan; Li, Mu; Zhou, Jin; Zheng, Chang-zheng

2009-07-01

399

METAL FUSION AND FABRICATION WELDING. AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS, MODULE, NUMBER 6.  

ERIC Educational Resources Information Center

ONE IN A SERIES DESIGNED TO HELP TEACHERS PREPARE POSTSECONDARY STUDENTS FOR THE AGRICULTURAL MACHINERY SERVICE OCCUPATIONS AS PARTS MEN, MECHANICS, MECHANIC'S HELPERS, OR SERVICE SUPERVISORS, THIS GUIDE AIMS TO DEVELOP STUDENT UNDERSTANDING OF WELDING EQUIPMENT AND SUPPLIES, AND ABILITY TO PERFORM SKILLS REQUIRED OF AGRICULTURAL MECHANICS. IT WAS…

Ohio State Univ., Columbus. Center for Vocational and Technical Education.

400

Tools, Equipment, and Machinery Adapted for the Vocational Education and Employment of Handicapped People.  

ERIC Educational Resources Information Center

Intended to assist in the vocational education and employment of individuals who are handicapped, this catalog contains descriptions and illustrations of modified tools, equipment, and machinery for use in 38 areas. These use areas are arts, assembly, assessment, automobile repair, benchwork, communication, computer processing, cosmetology,…

Gugerty, John, Comp.; And Others

401

Testing stands for laboratory tests of hydrostatic pumps of agricultural machinery  

Microsoft Academic Search

183 The hydraulic devices have a wide application in powerful mechanisms of agricultural and forest machines as well as in many other areas. The devel - opment of modern hydraulic components is aimed at increasing transferred power, decreasing energy severity, minimising environmental pollution, and increasing technical durability and machine reli - ability. The expansion of technical machineries and a wide

Z. Tká?; R. Majdan; P. Cví?ela

2008-01-01

402

CONTRIBUTION OF THE RESEARCH INSTITUTE OF AGRICULTURAL MACHINERY DURING 50 YEARS OF ITS EXISTENCE  

Microsoft Academic Search

The Research Institute of Agricultural Machinery was founded in 1960 at Ulbroka as a Research Institute of Agricultural Mechanisation and Electrification. In order to hasten the introduction of scientific developments into agriculture, a department of design engineers and an experimental workshop were formed at the Institute. The main directions of its action were mechanisation of field crop growing and harvesting,

Arvids Vilde; Dainis Viesturs; Imants Ziemelis; Ruta Balode

2010-01-01

403

MECHANICAL POWER TRANSFER SYSTEMS. AGRICULTURAL MACHINERY-SERVICE OCCUPATIONS, MODULE NUMBER 8.  

ERIC Educational Resources Information Center

ONE OF A SERIES DESIGNED TO HELP TEACHERS PREPARE POSTSECONDARY-LEVEL STUDENTS FOR THE AGRICULTURAL MACHINERY SERVICE OCCUPATIONS AS PARTS MEN, MECHANICS, MECHANIC'S HELPERS, AND SERVICE SUPERVISORS, THIS GUIDE AIMS TO DEVELOP STUDENT COMPETENCY IN UNDERSTANDING AND APPLYING THE PRINCIPLES OF MECHANICAL POWER TRANSMISSION IN AGRICULTURAL…

Ohio State Univ., Columbus. Center for Vocational and Technical Education.

404

Assessment of exposure to manganese in welding operations during the assembly of heavy excavation machinery accessories.  

PubMed

Welder exposure to metals in various industrial sectors is poorly characterized. We had the opportunity to carry out an exploratory study to characterize manganese exposure in welding operations in a recently established Quebec factory that assembled accessories for heavy excavation machinery. Ten workers were sampled for total manganese for at least two consecutive days out of three followed by two consecutive days for respirable manganese (with a size selective sampler with a median cut-off of 4 microns), during a typical week in the summer of 1998. Parts being welded were characterized as large or small. Small parts were those being welded on tables during subassembly. Workers were divided into two groups according to the parts they were welding. Seventy-eight percent of the total manganese exposure levels of welding operations during the assembly of large accessories of heavy excavation machinery exceeded the manganese American Conference of Governmental Industrial Hygienists (ACGIH) threshold limit value (TLV) of 0.20 mg/m3 (GM 0.24 mg/m3, n = 14) while none exceeded the TLV during the assembly of small pieces (GM 0.06 mg/m3, n = 8). Welding operations during the assembly of large heavy excavation machinery accessories may pose a significant health hazard. Considering the importance of task-related variables affecting exposure among workers, further studies are needed to better characterize exposure determinants of welding operations during the assembly of heavy excavation machinery accessories. PMID:11036725

Smargiassi, A; Baldwin, M; Savard, S; Kennedy, G; Mergler, D; Zayed, J

2000-10-01

405

Electric machinery diagnostic\\/testing system and power hardware-in-the-loop studies  

Microsoft Academic Search

This paper presents an electric machinery diagnostics (EMDS) system that improves on the traditional methods of either using simulation of a power system and its component or scaled down physical models to diagnose faults in hardware under test (HUT). The EMDS couples actual power hardware to a virtual simulation of the power system through a sim-stim interface (SSI) which sources

Saffet Ayasun; Sean Vallieu; Robert Fischl; Tom Chmielewski

2003-01-01

406

Quadrature mechatronic actuator (QMA) drives for heavy ship doors and machinery  

Microsoft Academic Search

An important part of the Navy objectives is to be both more efficient and enable manpower reduction is to reduce maintenance, reduce manpower, and eliminate pollutants through creating a more all-electric ship environment. However, placement of both non-centralized and centralized hydraulic systems for control of heavy machinery, large bay doors, articulated systems such as rudders for controlling air flow to

Gareth J. Knowles; Ross W. Bird; Michael J. Goehrig; William C. Knoll; Heath Hoffman

2004-01-01

407

Valuation of procurement flexibility in the machinery and equipment industry using the real option approach  

E-print Network

Valuation of procurement flexibility in the machinery and equipment industry using the real option uncertain business environment requires the necessity to implement more flexibility in companies are generally used in make-to-stock productions to secure flexibility. Therefore, an alternative approach has

Paris-Sud XI, Université de

408

Cell–matrix adhesion complexes: Master control machinery of cell migration  

Microsoft Academic Search

Cell–matrix adhesion complexes (CMACs) are foci of cellular attachment to the extracellular matrix (ECM). This attachment, mediated by integrins and adaptor proteins, provides both physical and regulatory links between the ECM and the cellular microfilament system. Through continual regulation and rearrangement of both ECM adhesion and actin structures, CMACs constitute core machineries of cell migration. To fulfill this role, CMACs

John G. Lock; Bernhard Wehrle-Haller; Staffan Strömblad

2008-01-01

409

Motor Vehicle and Machinery Repairers. Reprinted from the Occupational Outlook Handbook, 1978-79 Edition.  

ERIC Educational Resources Information Center

Focusing on motor vehicle and machinery repairers, this document is one in a series of forty-one reprints from the Occupational Outlook Handbook providing current information and employment projections for individual occupations and industries through 1985. The specific occupations covered in this document include automobile body repairers,…

Bureau of Labor Statistics (DOL), Washington, DC.

410

Evidence for a dynamic and transient pathway through the TAT protein transport machinery  

E-print Network

-tight membranes. Three membrane proteins comprise the Tat machinery in most systems. In thylakoids, cpTatC and HcfTatC pulls substrates through a patch of Tha4 on the lipid bilayer. The thylakoid system transported Categories: membranes & transport; proteins Keywords: chloroplasts; protein transport; thylakoid; trans

411

Chemotactic-like response of Escherichia coli cells lacking the known chemotaxis machinery but  

E-print Network

Chemotactic-like response of Escherichia coli cells lacking the known chemotaxis machinery as well as other known attractants of E. Coli, glucose and, to a lesser extent, galactose, maltose concen- trations, act as repellents for wild-type E. coli ). Other tested repellents such as indole, Ni2þ

Fernando, Chrisantha

412

The Machinery of Knowledge: An Ontology-Registry for a Geospatial Knowledge  

E-print Network

1 The Machinery of Knowledge: An Ontology-Registry for a Geospatial Knowledge Infrastructure not discovered using current search approaches. This paper describes an architecture for a geospatial knowledge is the ontology-registry. The ontology-registry stores all of the content that supports the knowledge

Stock, Kristin

413

Evaluating the life of the structures of farm machinery frames from the standpoint of crack resistance  

Microsoft Academic Search

The design of the supporting frames of agricultural machinery which are the optimum with respect to strength and metal consumption assumes their functioning under extreme conditions of load in the presence of various stress raisers. In this case, as experience shows, the failure of a structure is related most frequently to the development of cracks in its ele- ments. An

T. I. Rybak; V. I. Samodala; A. I. Darchuk; V. A. Proniv

1983-01-01

414

Vocational Agriculture Training Program: Safe Tractor and Farm Machinery Operation. Special Paper No. 8. Second Revision.  

ERIC Educational Resources Information Center

The publication was prepared for the United States Office of Education for use by teachers who direct agricultural training programs in safe tractor operation and safe farm machinery operation that comply with the United States Department of Labor regulations on hazardous occupations in agriculture. Upon successful completion of these training…

Bobbitt, Frank; Doss, Howard

415

GASOLINE TRACTOR ENGINE SYSTEMS. AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS, MODULE NUMBER 14.  

ERIC Educational Resources Information Center

ONE OF A SERIES DESIGNED TO HELP TEACHERS PREPARE POSTSECONDARY STUDENTS FOR AGRICULTURAL MACHINERY SERVICE OCCUPATIONS AS PARTS MEN, MECHANICS, MECHANIC'S HELPERS, AND SERVICE SUPERVISORS, THIS GUIDE AIMS TO DEVELOP STUDENT UNDERSTANDING OF THE OPERATION, COMPONENTS, AND FUNCTIONS OF VARIOUS GASOLINE TRACTOR ENGINE SYSTEMS. IT WAS DEVELOPED BY A…

Ohio State Univ., Columbus. Center for Vocational and Technical Education.

416

Rotational Spectrum of Sarin  

NASA Astrophysics Data System (ADS)

As part of an effort to examine the possibility of using molecular-beam Fourier-transform microwave spectroscopy to unambiguously detect and monitor chemical warfare agents, we report the first observation and assignment of the rotational spectrum of the nerve agent Sarin (GB) (Methylphosphonofluoridic acid 1-methyl-ethyl ester, CAS #107-44-8) at frequencies between 10 and 22 GHz. Only one of the two low-energy conformers of this organophosphorus compound (C 4H 10FO 2P) was observed in the rotationally cold ( Trot<2 K) molecular beam. The experimental asymmetric-rotor ground-state rotational constants of this conformer are A=2874.0710(9) MHz, B=1168.5776(4) MHz, C=1056.3363(4) MHz (Type A standard uncertainties are given, i.e., 1?), as obtained from a least-squares analysis of 74 a-, b-, and c-type rotational transitions. Several of the transitions are split into doublets due to the internal rotation of the methyl group attached to the phosphorus. The three-fold-symmetry barrier to internal rotation estimated from these splittings is 677.0(4) cm -1. Ab initio electronic structure calculations using Hartree-Fock, density functional, and Moller-Plesset perturbation theories have also been made. The structure of the lowest-energy conformer determined from a structural optimization at the MP2/6-311G ** level of theory is consistent with our experimental findings.

Walker, A. R. Hight; Suenram, R. D.; Samuels, Alan; Jensen, James; Ellzy, Michael W.; Lochner, J. Michael; Zeroka, Daniel

2001-05-01

417

Effect of sodium chloride supplementation on serum sodium concentration, cardiovascular function, and physical and cognitive performance.  

E-print Network

??These studies determined the effects of sodium chloride supplementation on serum and sweat sodium concentration, cardiovascular function, and physical and cognitive performance. Sweat sodium losses,… (more)

Pahnke, Matthew Daleon

2010-01-01

418

Study on kinetics of cathodic reduction of dissolved oxygen in 3.5% sodium chloride solution  

Microsoft Academic Search

Electrochemical reduction of dissolved oxygen in seawater on metals is of great importance for corrosion studies. The present\\u000a paper studied cathodic reduction of dissolved oxygen on Q235 carbon steel in 3.5% sodium chloride (NaCl) solutions by cyclic\\u000a voltammetry (CV), electrochemical impedance spectroscopy (EIS), rotating disk electrode (RDE) and rotating ring-disk electrode\\u000a (RRDE). The cyclic voltammetric results demonstrated the cathodic process

Yongjuan Li; Dun Zhang; Jiajia Wu

2010-01-01

419

Sodium bicarbonate: basically useless therapy.  

PubMed

Common clinical practices often are unsupported by experimental evidence. One example is the administration of sodium bicarbonate to neonates. Despite a long history of widespread use, objective evidence that administration of sodium bicarbonate improves outcomes for patients in cardiopulmonary arrest or with metabolic acidosis is lacking. Indeed, there is evidence that this therapy is detrimental. This review examines the history of sodium bicarbonate use in neonatology and the evidence that refutes the clinical practice of administering sodium bicarbonate during cardiopulmonary resuscitation or to treat metabolic acidosis in the NICU. PMID:18829808

Aschner, Judy L; Poland, Ronald L

2008-10-01

420

The Sodium-Restricted Diet  

E-print Network

, is cosmetically unbecoming, adds pounds and tends to reduce the normal flow of blood. One way to remove this excess fluid from the body is to restrict the sodium intake in the diet. Sodium-restricted diets are commonly used to treat a number of disease states..., is cosmetically unbecoming, adds pounds and tends to reduce the normal flow of blood. One way to remove this excess fluid from the body is to restrict the sodium intake in the diet. Sodium-restricted diets are commonly used to treat a number of disease states...

Anonymous,

1979-01-01

421

A Simple Quantitative Synthesis: Sodium Chloride from Sodium Carbonate.  

ERIC Educational Resources Information Center

Describes a simple laboratory procedure for changing sodium carbonate into sodium chloride by adding concentrated HCl to cause the reaction and then evaporating the water. Claims a good stoichiometric yield can be obtained in one three-hour lab period. Suggests using fume hood for the reaction. (ML)

Gold, Marvin

1988-01-01

422

GENOTOXICITY STUDIES OF SODIUM DICHLOROACETATE AND SODIUM TRICHLOROACETATE  

EPA Science Inventory

The genotoxic properties of sodium dichloroacetate (DCA) and sodium trichloroacetate (TCA)were evaluated in several short-term in vitro and in vivo assays. Neither compound was mutagenic in tester strain TA102 in the Salmonella mutagenicity assay. Both DCA and TCA were weak induc...

423

Antimicrobial and antioxidant effects of sodium acetate, sodium lactate, and sodium citrate in refrigerated sliced salmon  

Microsoft Academic Search

This study was carried out to evaluate the microbiological quality and lipid oxidation of fresh salmon slices treated by dipping in 2.5% (w\\/v) aqueous solution of sodium acetate (NaA), sodium lactate (NaL), or sodium citrate (NaC) and stored at 1°C. The results revealed that these salts were efficient (P<0.05) against the proliferation of various categories of spoilage microorganisms; including aerobic

Khalid Ibrahim Sallam

2007-01-01

424

Agricultural machineries wheeling and soil qualities mapping in climatic changes conditions  

NASA Astrophysics Data System (ADS)

As argued in the Fourth Assessment Report of the UN International Panel on Climate Change (IPCC) published in 2007 the global climate is changing and will continue to change in the near future. Due to the changing in time distribution and intensity of rainfall, the available time to carry out soil tillage operations, seedbed preparation and fertilizers distribution is becoming shorter. These issues are worsened by soil compaction that is one of the major problems facing modern agriculture. Soil compaction impedes infiltration of rainfall, so the increasing scale of mechanization might well be responsible for greater runoff, soil loss by water erosion and water-logging. Overuse of machinery, intensive cropping, short crop rotations, intensive grazing and inappropriate soil management leads to compaction. The objective of this research was to study the compacting effect of two wheeled tractors fitted with different type of tires during fertilizing operations with soil water content over field capacity. Field tests were carried out in a farm near Rome (41°52'502'' Latitude (N); 12°12'866" Longitude (E)) in March 2010 on a clay soil (Vertic Cambisol) during wheat fertilizing. One tractor was fitted with very narrow and high aspect ratio tires with mounted broadcaster coded (WTN), the other tractor was equipped with extra large and low aspect ratio tires with trailed broadcaster for a total of four axles coded (WTEL). Immediately after fertilising operations, such effects have been quantified through spatial variation of some soil parameters: soil water content, soil penetration resistance (CI) and soil shear strength (SS). Soil samplings have been carried out on the tracks left by the tractors and on soil not interested by the passage (control). To monitor all tractors passes across the field and to compute the total area covered by tractors tires a DGPS receiver was placed into the tractors; to map soil parameters studied, both on tracks left by the tractors passes and on control areas, a software GIS was used. Results shown the highest level of soil compaction caused by the traffic of WTN in term of CI and SS. In fact, increment ratio respect to the control measured after the tractors pass were: CI = 0.65 and 0.14 for WTN and for WTEL respectively; SS = 0.65 and 0.46 for WTN and WTEL respectively. Comparing the two different tires, significant differences were found particularly in the surface layers (0-0.20 m depth): mean values of CI and SS were higher for WTN (0.47 and 1.60 respectively) respect to WTEL. Track area covered by the two treatments respect to the whole field (16.32 ha) were: 0.025 for treatment WTN (0.27 m tires width) having an operative work width of 24 m ; 0.075 for treatment WTEL (0.85 m tires width) having an operative work width of 14 m. Results of this study highlighted that, in these field conditions (clay soil, water content over field capacity), tractor pass with very narrow tires caused a soil compaction level too high up to be impossible to traffic into the field. To operate at these soil water content conditions a tractors fitted with low aspect ratio and low inflation pressure tires is necessary. With lower soil water content, narrow tires allow carrying out fertilization into the inter-row avoiding crop trampling and compacting less percentage of field area respect to the a tractor equipped with large tires. Key words: Tractor, Soil trafficability, Soil compaction, Tires, GPS, GIS. Acknowledgements This work was carried out under the auspices of the special project "Sceneries of adaptation of the Italian agriculture to the climatic changes" (AGROSCENARI) of the Agricultural Research Council, and Italian Ministry of the Agricultural and Forestry Politics.

Bergonzoli, S.; Servadio, P.

2012-04-01

425

Antimicrobial and antioxidant effects of sodium acetate, sodium lactate, and sodium citrate in refrigerated sliced salmon  

PubMed Central

This study was carried out to evaluate the microbiological quality and lipid oxidation of fresh salmon slices treated by dipping in 2.5% (w/v) aqueous solution of sodium acetate (NaA), sodium lactate (NaL), or sodium citrate (NaC) and stored at 1 °C. The results revealed that these salts were efficient (P < 0.05) against the proliferation of various categories of spoilage microorganisms; including aerobic and psychrotrophic populations, Pseudomonas spp., H2S-producing bacteria, lactic acid bacteria, and Enterobacteriaceae. The general order of antibacterial activity of the different organic salts used was; sodium acetate > sodium lactate > sodium citrate. Lipid oxidation, as expressed by peroxide value (PV) and thiobarbituric acid (TBA) value, was significantly (P < 0.05) delayed in NaA- and NaC-treated samples. The antioxidant activity followed the order: NaC > NaA > NaL. The shelf life of the treated products was extended by 4–7 days more than that of the control. Therefore, sodium acetate, sodium lactate, and sodium citrate can be utilized as safe organic preservatives for fish under refrigerated storage. PMID:17471315

Sallam, Khalid Ibrahim

2007-01-01

426

49 CFR 173.189 - Batteries containing sodium or cells containing sodium.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Batteries containing sodium or cells containing sodium. 173.189 Section 173...173.189 Batteries containing sodium or cells containing sodium. (a) Batteries and cells may not contain any hazardous material...

2010-10-01

427

77 FR 71006 - Sodium Nitrite Injection and Sodium Thiosulfate Injection Drug Products Labeled for the Treatment...  

Federal Register 2010, 2011, 2012, 2013

...203923 for Sodium Thiosulfate Injection for sequential use with sodium...The approved Sodium Nitrite Injection and Nithiodote carry Boxed...are sold individually, as well as in cyanide antidote kits...required on Sodium Nitrite Injection and Nithiodote, which...

2012-11-28

428

Molecular Structure of Sodium persulfate  

NSDL National Science Digital Library

Sodium persulfate is an etchant and oxidizer. Oxidizers are highly reactive chemicals that can be used to clean or to render a metal surface free from corrosion. It is a crystalline or powdery solid at room temperature. Sodium persulfate is commonly used today as a replacement for ammonium persulfate in the etching of metal and semi-conductor surfaces.

2002-10-01

429

Lattice QCD in rotating frames.  

PubMed

We formulate lattice QCD in rotating frames to study the physics of QCD matter under rotation. We construct the lattice QCD action with the rotational metric and apply it to the Monte Carlo simulation. As the first application, we calculate the angular momenta of gluons and quarks in the rotating QCD vacuum. This new framework is useful to analyze various rotation-related phenomena in QCD. PMID:24010426

Yamamoto, Arata; Hirono, Yuji

2013-08-23

430

IO Rotation Movie  

NASA Technical Reports Server (NTRS)

During its 1979 flyby, Voyager 2 observed Io only from a distance. However, the volcanic activity discovered by Voyager 1 months earlier was readily visible. This sequence of nine color images was collected using the Blue, Green and Orange filters from about 1.2 million kilometers. A 2.5 hour period is covered during which Io rotates 7 degrees.

Rotating into view over the limb of Io are the plumes of the volcanoes Amirani (top) and Maui (lower). These plumes are very distinct against the black sky because they are being illuminated from behind. Notice that as Io rotates, the proportion of Io which is sunlit decreases greatly. This changing phase angle is because Io is moving between the spacecraft and the Sun.

This time-lapse movie was produced at JPL by the Image Processing Laboratory in 1985.

2000-01-01

431

Rotation of cometary meteoroids  

E-print Network

The aim of this study is to estimate the rotational characteristics of meteoroids after their release from a comet during normal activity. The results can serve as initial conditions for further analyses of subsequent evolution of rotation in the interplanetary space. A sophisticated numerical model was applied to meteoroids ejected from 2P/Encke comet. The meteoroid shapes were approximated by polyhedrons with several thousands of surface elements, which have been determined by 3D laser scanning method of 36 terrestrial rock samples. These samples came from three distinct sets with different origin and shape characteristics. Two types of gas-meteoroid interactions (diffuse and specular reflection of gas molecules from the surface of meteoroid) and three gas ejection models (leading to very different ejection velocities) were assumed. The rotational characteristics of ejected meteoroid population were obtained by numerical integration of equations of motion with random initial conditions and random shape sele...

Capek, David

2014-01-01

432

Rotations by pgr/7  

NASA Astrophysics Data System (ADS)

Piecewise rotations are natural generalizations of interval exchange maps. They appear naturally in the theory of digital filters, Hamiltonian systems and polygonal dual billiards. We construct a rational piecewise rotation system with three atoms for which the return time to one of the atoms is unbounded. We show that the return map gives rise to a self-similar structure of induced atoms. The constructions are based on the angle of rotation pgr/7. Moreover, we construct a continuous class of examples with an infinite number of periodic cells. These periodic cells alternate between two atoms and they form a self-similar structure. Our investigation here may be viewed as generalizations of results obtained by Boshernitzan and Caroll, as well as Adler, Kitchens and Tresser, Kahng, Lowenstein and others. The main tools in the investigation are algebraic computations in a cyclotomic field determined by fourteenth roots of unity.

Goetz, Arek; Poggiaspalla, Guillaume

2004-09-01

433

Space time and rotations  

E-print Network

The paper considers the problem of finding the metric of space time around a rotating, weakly gravitating body. Both external and internal metric tensors are consistently found, together with an appropriate source tensor. All tensors are calculated at the lowest meaningful approximation in a power series. The two physical parameters entering the equations (the mass and the angular momentum per unit mass) are assumed to be such that the mass effects are negligible with respect to the rotation effects. A non zero Riemann tensor is obtained. The order of magnitude of the effects at the laboratory scale is such as to allow for experimental verification of the theory.

A. Tartaglia

2002-01-04

434

Rotating shielded crane system  

SciTech Connect

A rotating, radiation shielded crane system for use in a high radiation test cell, comprises a radiation shielding wall, a cylindrical ceiling made of radiation shielding material and a rotatable crane disposed above the ceiling. The ceiling rests on an annular ledge intergrally attached to the inner surface of the shielding wall. Removable plugs in the ceiling provide access for the crane from the top of the ceiling into the test cell. A seal is provided at the interface between the inner surface of the shielding wall and the ceiling.

Commander, John C. (Idaho Falls, ID)

1988-01-01

435

Evolutionary primacy of sodium bioenergetics  

PubMed Central

Background The F- and V-type ATPases are rotary molecular machines that couple translocation of protons or sodium ions across the membrane to the synthesis or hydrolysis of ATP. Both the F-type (found in most bacteria and eukaryotic mitochondria and chloroplasts) and V-type (found in archaea, some bacteria, and eukaryotic vacuoles) ATPases can translocate either protons or sodium ions. The prevalent proton-dependent ATPases are generally viewed as the primary form of the enzyme whereas the sodium-translocating ATPases of some prokaryotes are usually construed as an exotic adaptation to survival in extreme environments. Results We combine structural and phylogenetic analyses to clarify the evolutionary relation between the proton- and sodium-translocating ATPases. A comparison of the structures of the membrane-embedded oligomeric proteolipid rings of sodium-dependent F- and V-ATPases reveals nearly identical sets of amino acids involved in sodium binding. We show that the sodium-dependent ATPases are scattered among proton-dependent ATPases in both the F- and the V-branches of the phylogenetic tree. Conclusion Barring convergent emergence of the same set of ligands in several lineages, these findings indicate that the use of sodium gradient for ATP synthesis is the ancestral modality of membrane bioenergetics. Thus, a primitive, sodium-impermeable but proton-permeable cell membrane that harboured a set of sodium-transporting enzymes appears to have been the evolutionary predecessor of the more structurally demanding proton-tight membranes. The use of proton as the coupling ion appears to be a later innovation that emerged on several independent occasions. Reviewers This article was reviewed by J. Peter Gogarten, Martijn A. Huynen, and Igor B. Zhulin. For the full reviews, please go to the Reviewers' comments section. PMID:18380897

Mulkidjanian, Armen Y; Galperin, Michael Y; Makarova, Kira S; Wolf, Yuri I; Koonin, Eugene V

2008-01-01

436

21 CFR 184.1721 - Sodium acetate.  

Code of Federal Regulations, 2013 CFR

...anhydrous or trihydrated form. It is produced synthetically by the neutralization of acetic acid with sodium carbonate or by treating calcium acetate with sodium sulfate and sodium bicarbonate. (b) The ingredient meets the...

2013-04-01

437

21 CFR 184.1721 - Sodium acetate.  

...anhydrous or trihydrated form. It is produced synthetically by the neutralization of acetic acid with sodium carbonate or by treating calcium acetate with sodium sulfate and sodium bicarbonate. (b) The ingredient meets the...

2014-04-01

438

21 CFR 184.1721 - Sodium acetate.  

Code of Federal Regulations, 2012 CFR

...anhydrous or trihydrated form. It is produced synthetically by the neutralization of acetic acid with sodium carbonate or by treating calcium acetate with sodium sulfate and sodium bicarbonate. (b) The ingredient meets the...

2012-04-01

439

21 CFR 184.1721 - Sodium acetate.  

Code of Federal Regulations, 2011 CFR

...anhydrous or trihydrated form. It is produced synthetically by the neutralization of acetic acid with sodium carbonate or by treating calcium acetate with sodium sulfate and sodium bicarbonate. (b) The ingredient meets the...

2011-04-01

440

21 CFR 184.1721 - Sodium acetate.  

Code of Federal Regulations, 2010 CFR

...anhydrous or trihydrated form. It is produced synthetically by the neutralization of acetic acid with sodium carbonate or by treating calcium acetate with sodium sulfate and sodium bicarbonate. (b) The ingredient meets the...

2010-04-01

441

21 CFR 186.1750 - Sodium chlorite.  

... Sodium chlorite. (a) Sodium chlorite (NaCLO2 , CAS Reg. No. 7758-19-2) exists as slightly hygroscopic white crystals or flakes. It is manufactured by passing chlorine dioxide into a solution of sodium hydroxide and hydrogen peroxide....

2014-04-01

442

Influenza A virus uses the aggresome processing machinery for host cell entry.  

PubMed

During cell entry, capsids of incoming influenza A viruses (IAVs) must be uncoated before viral ribonucleoproteins (vRNPs) can enter the nucleus for replication. After hemagglutinin-mediated membrane fusion in late endocytic vacuoles, the vRNPs and the matrix proteins dissociate from each other and disperse within the cytosol. Here, we found that for capsid disassembly, IAV takes advantage of the host cell's aggresome formation and disassembly machinery. The capsids mimicked misfolded protein aggregates by carrying unanchored ubiquitin chains that activated a histone deacetylase 6 (HDAC6)-dependent pathway. The ubiquitin-binding domain was essential for recruitment of HDAC6 to viral fusion sites and for efficient uncoating and infection. That other components of the aggresome processing machinery, including dynein, dynactin, and myosin II, were also required suggested that physical forces generated by microtubule- and actin-associated motors are essential for IAV entry. PMID:25342804

Banerjee, Indranil; Miyake, Yasuyuki; Nobs, Samuel Philip; Schneider, Christoph; Horvath, Peter; Kopf, Manfred; Matthias, Patrick; Helenius, Ari; Yamauchi, Yohei

2014-10-24

443

The dynamic organization of gene-regulatory machinery in nuclear microenvironments  

PubMed Central

Nuclear components are functionally linked with the dynamic temporal and spatial compartmentalization, sorting and integration of regulatory information to facilitate its selective use. For example, the subnuclear targeting of transcription factors to punctate sites in the interphase nucleus mechanistically couples chromatin remodelling and the execution of signalling cascades that mediate gene expression with the combinatorial assembly of the regulatory machinery for biological control. In addition, a mitotic cycle of selective partitioning and sequential restoration of the transcriptional machinery provides a basis for the reassembly of regulatory complexes to render progeny cells competent for phenotypic gene expression. When this intranuclear targeting and localization of regulatory proteins is compromised, diseases, such as cancer, can occur. A detailed understanding of this process will provide further options for diagnosis and treatment. PMID:15689940

Zaidi, Sayyed K.; Young, Daniel W.; Choi, Je-Yong; Pratap, Jitesh; Javed, Amjad; Montecino, Martin; Stein, Janet L.; van Wijnen, Andre J.; Lian, Jane B.; Stein, Gary S.

2005-01-01

444

The Sodium Content of Your Food.  

E-print Network

, shows sodium values. To allow for variability among packages, cereal manufacturers may show higher values on packages of cereal than those shown in Table 1. 4 Some over-the-counter drugs, particularly antacids, contain sodium in significant amounts... per ms per do= 100 ml Analgesic (Various) Aspirin 49 - Antacid analgesic Bromo-Seltzer@ Acetaminophen 717 - Sodium citrate Aspirin (blue box) Sodium citrate 521 - Antacid laxative Sal Hepatica@ Sodium bicarbonate 1,000 - Sodium monohydrogen...

Anonymous,

1982-01-01

445

Rotationally Actuated Prosthetic Hand  

NASA Technical Reports Server (NTRS)

Prosthetic hand attached to end of remaining part of forearm and to upper arm just above elbow. Pincerlike fingers pushed apart to degree depending on rotation of forearm. Simpler in design, simpler to operate, weighs less, and takes up less space.

Norton, William E.; Belcher, Jewell G., Jr.; Carden, James R.; Vest, Thomas W.

1991-01-01

446

Rotational Dynamics with Tracker  

ERIC Educational Resources Information Center

We propose the use of Tracker, freeware for video analysis, to analyse the moment of inertia ("I") of a cylindrical plate. Three experiments are performed to validate the proposed method. The first experiment is dedicated to find the linear coefficient of rotational friction ("b") for our system. By omitting the effect of such friction, we derive…

Eadkhong, T.; Rajsadorn, R.; Jannual, P.; Danworaphong, S.

2012-01-01

447

Digital rotation measurement unit  

Microsoft Academic Search

A digital rotation indicator is disclosed for monitoring the position of a valve member having a movable actuator. The indicator utilizes mercury switches adapted to move in cooperation with the actuator. Each of the switches produces an output as it changes state when the actuator moves. A direction detection circuit is connected to the switches to produce a first digital

S. N. Sanderson

1983-01-01

448

Digital Rotation Measurement Unit.  

National Technical Information Service (NTIS)

A digital rotation indicator is disclosed for monitoring the position of a valve member having a movable actuator. The indicator utilizes mercury switches adapted to move in cooperation with the actuator. Each of the switches produces an output as it chan...

S. N. Sanderson

1983-01-01

449

Mars Rotate (False Color)  

NSDL National Science Digital Library

This site from NASA's Goddard Space Flight Center features an animation of Mars rotating. The visualization was created using data collected by the Mars Orbiting Laser Altimeter (MOLA) on board the Mars Global Surveyor. The animation uses false color to highlight topography, specifically the Hellas Basin, Terra Meridiani, the Tharsis rise, and Lucus Planum. The site also provides still images of the same features.

Studio, Nasa/goddard S.

450

Mars Rotate (True Color)  

NSDL National Science Digital Library

This site from NASA's Goddard Space Flight Center features an animation of Mars rotating. Topography is shown in true color and includes such features as the Hellas Basin, Terra Meridiani, the Tharsis rise, and Lucus Planum. Still images are also provided.

Studio, Nasa/goddard S.

451

Rotator cuff exercises  

MedlinePLUS

... to make the muscles and tendons in your joint stronger and more flexible. Your doctor may refer you to a physical therapist to treat your rotator cuff. A physical therapist is trained to help improve your ability to do the activities you want.

452

Free Rotation Model  

NSDL National Science Digital Library

The Free Rotation model shows the torque-free motion of a rectangular block. The model displays a space frame view showing a constant angular momentum arrow and a body group containing a block and body-axis arrows. This model is designed for the study of torque-free precession. The tips of the body frame axis arrows trace trajectories to illustrate stable and unstable rotation of the block about a principal axes. A second window displays the body frame view with space frame xyz-axes orbiting the block. The Free Rotation model is a supplemental simulation for the article "It Has to Go Down a Little, in Order to Go Around" by Svilen Kostov and Daniel Hammer in The Physics Teacher 49(4), 216-219 (2011) and has been approved by the authors and The Physics Teacher editor. The model was developed using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_csm_ch17_FreeRotation.jar file will run the program if Java is installed.

Christian, Wolfgang

2011-02-10

453

Optical Gyroscopes: Sensing Rotation  

E-print Network

was the harnessing of the Sagnac effect, to make practical and extremely sensitive yet rugged optical rotation nautical MPH STRATEGIC NAV TACTICAL LOWTACTICAL torpedo, AHRS Tactical missile midcourse guidane Robotics,-y,-z) · Symmetry ­ Exploited whenever possible · Special Theory of Relativity ­ Light in vacuum travels at 3? 108

Miller, Ethan L.

454

LABORATORY VI ROTATIONAL DYNAMICS  

E-print Network

are important whether you are discussing galaxies or subatomic particles. An object's rotational motion can of objects as point particles rather than extended bodies. This assumption is useful and sometimes good enough. However, the approximation of extended bodies as point particles gives an incomplete picture

Minnesota, University of

455

Diamond rotating bit  

SciTech Connect

An improved rotating diamond bit for earth boring is devised by incorporating generally triangular, prismatically shaped synthetic polycrystalline diamond elements in the teeth of the boring bit. The polycrystalline diamond elements are set on lands defined on the bit face such that two opposing triangular faces of the prismatic diamond element form a dihedral angle in the direction of travel of the element defined by the bit rotation. The polycrystalline diamond element is thus inclined with respect to the direction of linear travel of the element when the bit rotates. In other words, the normal to the parallel opposing triangular faces of the diamond element is acutely inclined with respect to the direction of travel of the element. A shoulder-to-gage transition pattern of the junk slot, waterway and collector is arranged to uniformly distribute the flow of fluid across the shoulder to guage transition. Further, the distribution of fluid from the central conduit within the longitudinal core of the bit to a plurality of nozzles which merge with corresponding waterways on the bit face is arranged such that fluid is preferentially delivered to a radially innermost nozzle and thereafter in a graduated series of steps in lesser amounts to a series of sequenced nozzles more radially disposed from the center of the rotating bit.

Link, H. D.

1985-11-05

456

Rotating Phasors- Negative Frequencies  

NSDL National Science Digital Library

This interactive phasor page allows you to control the values of a rotating phasor and see a visualization of each change that is done. You can control: one, pos/neg, two, beats, delta, sawtooth, square, triangle, time, zoom, plus you can put into five different values: Frequency (rel, HZ, mHZ), Amplitude (raw, rel), and Phases (Deg, Rad, unitrad).

2011-05-25

457

Rotator Cuff Injuries.  

ERIC Educational Resources Information Center

Many baseball players suffer from shoulder injuries related to the rotator cuff muscles. These injuries may be classified as muscular strain, tendonitis or tenosynovitis, and impingement syndrome. Treatment varies from simple rest to surgery, so it is important to be seen by a physician as soon as possible. In order to prevent these injuries, the…

Connors, G. Patrick

458

Rotational speed control  

NASA Technical Reports Server (NTRS)

Viewgraphs on rotational speed control are presented. The Centrifuge Facility Systems Study - 2.5 m centrifuge is shown. A life sciences centrifuge is scheduled to fly aboard Space Station Freedom. Live animal and plant specimens will be carried on the rotor and compared with microgravity specimens in racks.

Bastin, Paul

1990-01-01

459

Rotation Invariant Template Matching  

Microsoft Academic Search

Abstract: In rotation invariant template matching one wants tondnding fromthe given input image the locations that are similar to the given patterntemplate, so that the pattern may have any orientation. Templatematching is an old but important problem in computer vision and patternrecognition, and thus there have also been many attempts to solveit. Most of the most successful solutions so far

K. Fredriksson

2001-01-01

460

Rotational Dynamics Problem: Torque  

NSDL National Science Digital Library

A turntable (a flat disk) of mass 5.0-kg is rotating at a constant speed when your finger makes contact with the outer edge, as shown in the animation (position of a point on the outer edge of the turntable is shown in meters and time is shown in seconds). Friction between your finger and the turntable causes the turntable to stop.

Christian, Wolfgang; Belloni, Mario

2006-01-21

461

Cellular energization protects the photosynthetic machinery against salt-induced inactivation in Synechococcus  

Microsoft Academic Search

The effects of the energization of cells by light and by exogenous glucose on the salt-induced inactivation of the photosynthetic machinery were investigated in the cyanobacterium Synechococcus sp. PCC 7942. The incubation of the cyanobacterial cells in a medium supplemented with 0.5 M NaCl induced a rapid decline with a subsequent slow decline, in the oxygen-evolving activity of Photosystem (PS)

Suleyman I. Allakhverdiev; Vyacheslav V. Klimov; Martin Hagemann

2005-01-01

462

FOREWORD: The XXV IAHR Symposium on Hydraulic Machinery and Systems marks half a century tradition  

Microsoft Academic Search

IAHR75_logoUPT90_logoARFT_logo International Association of Hydro-Environment Engineering and Research'Politehnica' University of TimisoaraRomanian Academy - Timisoara Branch The 25th edition of the IAHR Symposium on Hydraulic Machinery and Systems, held in Timisoara, Romania, 20-24 September 2010, jointly organized by the 'Politehnica' University of Timisoara and the Romanian Academy - Timisoara Branch, marks a half century tradition of these prestigious symposia. However, it

Romeo Susan-Resiga

2010-01-01

463

Expression and Functional Analysis of Human Leukocyte Antigen Class I Antigen-Processing Machinery in Medulloblastoma  

Microsoft Academic Search

Defects in the expression and\\/or function of the human leukocyte antigen (HLA) class I antigen-processing machinery (APM) components are found in many tumor types.These abnormalities may have a negative impact on the interactions of tumor cells with host's immune system and on the outcome of T cell-based immunotherapy.To the best of our knowledge, no information is available about APM component

Lizzia Raffaghello; Paolo Nozza; Fabio Morandi; Marta Camoriano; Xinhui Wang; Maria Luisa Garre; Armando Cama; Giuseppe Basso; Soldano Ferrone; Claudio Gambini; Vito Pistoia

464

Reconstitution of the protein insertion machinery of the mitochondrial inner membrane  

Microsoft Academic Search

We have reconstituted the protein insertion machinery of the yeast mitochondrial inner membrane into proteoliposomes. The reconstituted proteoliposomes have a distinct morphology and protein composition and correctly insert the ADP\\/ATP carrier (AAC) and Tim23p, two multi-spanning integral proteins of the mitochondrial inner membrane. The reconstituted system requires a membrane potential, but not Tim44p or mhsp70, both of which are required

Gottfried Schatz; Volker Haucke

1997-01-01

465

Feature Group Optimization for Machinery Fault Diagnosis Based on Fuzzy Measures  

Microsoft Academic Search

With the development of modern multi-sensor based data acquisition technology often used with advanced signal processing techniques,\\u000a more and more features are being extracted for the purposes of fault diagnostics and prognostics of machinery integrity. Applying\\u000a multiple features can enhance the condition monitoring capability and improve the fault diagnosis accuracy. However, an excessive\\u000a number of features also increases the complexity

Xiaofeng Liu; Lin Ma; Sheng Zhang; Joseph Mathew

466

Autophagy machinery mediates macroendocytic processing and entotic cell death by targeting single membranes  

Microsoft Academic Search

Autophagy normally involves the formation of double-membrane autophagosomes that mediate bulk cytoplasmic and organelle degradation. Here we report the modification of single-membrane vacuoles in cells by autophagy proteins. LC3 (Light chain 3) a component of autophagosomes, is recruited to single-membrane entotic vacuoles, macropinosomes and phagosomes harbouring apoptotic cells, in a manner dependent on the lipidation machinery including ATG5 and ATG7,

Oliver Florey; Sung Eun Kim; Cynthia P. Sandoval; Cole M. Haynes; Michael Overholtzer

2011-01-01

467

Splicing in disease: disruption of the splicing code and the decoding machinery  

Microsoft Academic Search

Human genes contain a dense array of diverse cis-acting elements that make up a code required for the expression of correctly spliced mRNAs. Alternative splicing generates a highly dynamic human proteome through networks of coordinated splicing events. Cis- and trans-acting mutations that disrupt the splicing code or the machinery required for splicing and its regulation have roles in various diseases,

Guey-Shin Wang; Thomas A. Cooper

2007-01-01

468

Interactions between Telomerase and Primase Physically Link the Telomere and Chromosome Replication Machinery  

Microsoft Academic Search

In the ciliate Euplotes crassus, millions of new telomeres are synthesized by telomerase and polymerase -primase during macronuclear development in mated cells. Concomitant with de novo telomere formation, telomerase assembles into higher-order complexes of 550 kDa, 1,600 kDa, and 5 MDa. We show here that telomerase is physically associated with the lagging-strand replication machinery in these complexes. Anti- bodies against

Saugata Ray; Zemfira Karamysheva; Libin Wang; Dorothy E. Shippen; Carolyn M. Price

2002-01-01

469

Rabies Virus Hijacks and accelerates the p75NTR retrograde axonal transport machinery.  

PubMed

Rabies virus (RABV) is a neurotropic virus that depends on long distance axonal transport in order to reach the central nervous system (CNS). The strategy RABV uses to hijack the cellular transport machinery is still not clear. It is thought that RABV interacts with membrane receptors in order to internalize and exploit the endosomal trafficking pathway, yet this has never been demonstrated directly. The p75 Nerve Growth Factor (NGF) receptor (p75NTR) binds RABV Glycoprotein (RABV-G) with high affinity. However, as p75NTR is not essential for RABV infection, the specific role of this interaction remains in question. Here we used live cell imaging to track RABV entry at nerve terminals and studied its retrograde transport along the axon with and without the p75NTR receptor. First, we found that NGF, an endogenous p75NTR ligand, and RABV, are localized in corresponding domains along nerve tips. RABV and NGF were internalized at similar time frames, suggesting comparable entry machineries. Next, we demonstrated that RABV could internalize together with p75NTR. Characterizing RABV retrograde movement along the axon, we showed the virus is transported in acidic compartments, mostly with p75NTR. Interestingly, RABV is transported faster than NGF, suggesting that RABV not only hijacks the transport machinery but can also manipulate it. Co-transport of RABV and NGF identified two modes of transport, slow and fast, that may represent a differential control of the trafficking machinery by RABV. Finally, we determined that p75NTR-dependent transport of RABV is faster and more directed than p75NTR-independent RABV transport. This fast route to the neuronal cell body is characterized by both an increase in instantaneous velocities and fewer, shorter stops en route. Hence, RABV may employ p75NTR-dependent transport as a fast mechanism to facilitate movement to the CNS. PMID:25165859

Gluska, Shani; Zahavi, Eitan Erez; Chein, Michael; Gradus, Tal; Bauer, Anja; Finke, Stefan; Perlson, Eran

2014-08-01

470

Association of antigen processing machinery and HLA class I defects with clinicopathological outcome in cervical carcinoma  

Microsoft Academic Search

HLA class I loss is a significant mechanism of immune evasion by cervical carcinoma, interfering with the development of immunotherapies\\u000a and cancer vaccines. We report the systematic investigation of HLA class I and antigen processing machinery component expression\\u000a and association with clinical outcome. A tissue microarray containing carcinoma lesions from 109 cervical carcinoma patients\\u000a was stained for HLA class I

Akash M. Mehta; Ekaterina S. Jordanova; Gemma G. Kenter; Soldano Ferrone; Gert-Jan Fleuren

2008-01-01

471

The sabotage of the bacterial transcription machinery by a small bacteriophage protein  

PubMed Central

Many bacteriophages produce small proteins that specifically interfere with the bacterial host transcription machinery and thus contribute to the acquisition of the bacterial cell by the bacteriophage. We recently described how a small protein, called P7, produced by the Xp10 bacteriophage inhibits bacterial transcription initiation by causing the dissociation of the promoter specificity sigma factor subunit from the host RNA polymerase holoenzyme. In this addendum to the original publication, we present the highlights of that research. PMID:24701369

Liu, Bing; Shadrin, Andrey; Sheppard, Carol; Mekler, Vladimir; Xu, Yingqi; Severinov, Konstantin; Matthews, Steve; Wigneshweraraj, Sivaramesh

2014-01-01

472

Machinery-related injuries: regional rural injury study--I (RRIS--I).  

PubMed

Although it is known that farm machinery is a source of serious and catastrophic farm work-related injuries, little is known about the magnitude of, and potential risk factors for, this problem. The study population is from the five-state Regional Rural Injury Study--I (RRIS--I) that included 3,939 farm households and 13,144 persons who were interviewed about their injury experience and farming operation-related exposures during 1990. Rates were calculated for sociodemographic variables and various exposures pertinent to large farm machinery (excluding tractors). Multivariate analyses were conducted using logistic regression, based on a model developed a priori and further confirmed using backward stepwise logistic regression. Among the total farming-related injury events (n = 764), 151 (20%) were related to large machinery use (1,127 injured persons per 100,000 persons per year). Through multivariate analyses, several variables were associated with elevated rate ratios that were important in both models: hours worked per week on the farm (40-59, 60-79, 80+); operation of an auger; field crops as the enterprise requiring the most time; and male gender. In addition, in the backward stepwise model, certain marital status categories (married; separated/widowed/divorced) were also associated with elevated rate ratios that were important. The majority of injury events occurred while persons were lifting, pushing, or pulling (21%), adjusting a machine (20%), or repairing a machine (17%). While only 5% of the cases were hospitalized, 79% required some type of health care. Among all injured persons, 34% were restricted from regular activities for 1 week or more and 19% were restricted for 1 month or more; 25% continued to have persistent problems. In summary, the RRIS-I permitted one of the most comprehensive studies of agricultural machinery-related injuries, to date. The findings indicate that these injuries represent a significant problem, based on the relevant rates, potential risk factors, and consequences from trauma. PMID:9805522

Gerberich, S G; Gibson, R W; French, L R; Lee, T Y; Carr, W P; Kochevar, L; Renier, C M; Shutske, J

1998-11-01

473

The Impact of Farm Machinery Management on the Greenhouse Gas Emissions from Canadian Agriculture  

Microsoft Academic Search

The impact of proposed changes in field operations and land use on fossil fuel consumption on Canadian farms was analyzed using a computer model of the mechanics of farm machinery. The model predicted tractor\\/harvester power needs (kW), implement sizes and work required (kW-h) to complete each field operation on model farms in Canada's four farming regions. These predictions were integrated

J. A. Dyer; R. L. Desjardins

2003-01-01

474

Conceptual design and analysis of roads and road construction machinery for initial lunar base operations  

NASA Technical Reports Server (NTRS)

Recent developments have made it possible for scientists and engineers to consider returning to the Moon to build a manned lunar base. The base can be used to conduct scientific research, develop new space technology, and utilize the natural resources of the Moon. Areas of the base will be separated, connected by a system of roads that reduce the power requirements of vehicles traveling on them. Feasible road types for the lunar surface were analyzed and a road construction system was designed for initial lunar base operations. A model was also constructed to show the system configuration and key operating features. The alternate designs for the lunar road construction system were developed in four stages: analyze and select a road type; determine operations and machinery needed to produce the road; develop machinery configurations; and develop alternates for several machine components. A compacted lunar soil road was selected for initial lunar base operations. The only machinery required to produce this road were a grader and a compactor. The road construction system consists of a main drive unit which is used for propulsion, a detachable grader assembly, and a towed compactor.

Sines, Jeffrey L.; Banks, Joel; Efatpenah, Keyanoush

1990-01-01

475

The iron-sulfur cluster assembly machineries in plants: current knowledge and open questions.  

PubMed

Many metabolic pathways and cellular processes occurring in most sub-cellular compartments depend on the functioning of iron-sulfur (Fe-S) proteins, whose cofactors are assembled through dedicated protein machineries. Recent advances have been made in the knowledge of the functions of individual components through a combination of genetic, biochemical and structural approaches, primarily in prokaryotes and non-plant eukaryotes. Whereas most of the components of these machineries are conserved between kingdoms, their complexity is likely increased in plants owing to the presence of additional assembly proteins and to the existence of expanded families for several assembly proteins. This review focuses on the new actors discovered in the past few years, such as glutaredoxin, BOLA and NEET proteins as well as MIP18, MMS19, TAH18, DRE2 for the cytosolic machinery, which are integrated into a model for the plant Fe-S cluster biogenesis systems. It also discusses a few issues currently subjected to an intense debate such as the role of the mitochondrial frataxin and of glutaredoxins, the functional separation between scaffold, carrier and iron-delivery proteins and the crosstalk existing between different organelles. PMID:23898337

Couturier, Jérémy; Touraine, Brigitte; Briat, Jean-François; Gaymard, Frédéric; Rouhier, Nicolas

2013-01-01

476

The iron-sulfur cluster assembly machineries in plants: current knowledge and open questions  

PubMed Central

Many metabolic pathways and cellular processes occurring in most sub-cellular compartments depend on the functioning of iron-sulfur (Fe-S) proteins, whose cofactors are assembled through dedicated protein machineries. Recent advances have been made in the knowledge of the functions of individual components through a combination of genetic, biochemical and structural approaches, primarily in prokaryotes and non-plant eukaryotes. Whereas most of the components of these machineries are conserved between kingdoms, their complexity is likely increased in plants owing to the presence of additional assembly proteins and to the existence of expanded families for several assembly proteins. This review focuses on the new actors discovered in the past few years, such as glutaredoxin, BOLA and NEET proteins as well as MIP18, MMS19, TAH18, DRE2 for the cytosolic machinery, which are integrated into a model for the plant Fe-S cluster biogenesis systems. It also discusses a few issues currently subjected to an intense debate such as the role of the mitochondrial frataxin and of glutaredoxins, the functional separation between scaffold, carrier and iron-delivery proteins and the crosstalk existing between different organelles. PMID:23898337

Couturier, Jeremy; Touraine, Brigitte; Briat, Jean-Francois; Gaymard, Frederic; Rouhier, Nicolas

2013-01-01

477

The midbody ring scaffolds the abscission machinery in the absence of midbody microtubules  

PubMed Central

Abscission completes cytokinesis to form the two daughter cells. Although abscission could be organized from the inside out by the microtubule-based midbody or from the outside in by the contractile ring–derived midbody ring, it is assumed that midbody microtubules scaffold the abscission machinery. In this paper, we assess the contribution of midbody microtubules versus the midbody ring in the Caenorhabditis elegans embryo. We show that abscission occurs in two stages. First, the cytoplasm in the daughter cells becomes isolated, coincident with formation of the intercellular bridge; proper progression through this stage required the septins (a midbody ring component) but not the membrane-remodeling endosomal sorting complex required for transport (ESCRT) machinery. Second, the midbody and midbody ring are released into a specific daughter cell during the subsequent cell division; this stage required the septins and the ESCRT machinery. Surprisingly, midbody microtubules were dispensable for both stages. These results delineate distinct steps during abscission and highlight the central role of the midbody ring, rather than midbody microtubules, in their execution. PMID:24217623

Green, Rebecca A.; Mayers, Jonathan R.; Wang, Shaohe; Lewellyn, Lindsay; Desai, Arshad; Audhya, Anjon

2013-01-01

478

YscN, the putative energizer of the Yersinia Yop secretion machinery.  

PubMed Central

Pathogenic yersiniae secrete a set of 11 antihost proteins called Yops. Yop secretion appears as the archetype of the type III secretion pathway. Several components of this machinery are encoded by the virA (lcrA) and virC (lcrC) loci of the 70-kb pYV plasmid. In this paper, we describe yscN, another gene involved in this pathway. It is the first gene of the virB locus. It encodes a 47.8-kDa protein similar to the catalytic subunits of F0F1 and related ATPases, as well as to products of other genes presumed to be involved in a type III secretion pathway. YscN contains the two consensus nucleotide-binding motifs (boxes A and B) described by Walker et al. (J. E. Walker, M. Saraste, M. J. Runswick, and N. J. Gay, EMBO J. 1:945-951, 1982). We engineered a pYV mutant encoding a modified YscN protein lacking box A. This mutant, impaired in Yop secretion, can be complemented in trans by a cloned yscN gene. We conclude that YscN is a component of the Yop secretion machinery using ATP. We hypothesize that it is either the energizer of this machinery or a part of it. Images PMID:8132449

Woestyn, S; Allaoui, A; Wattiau, P; Cornelis, G R

1994-01-01

479

Roles of repressive epigenetic machinery in lineage decision of T cells  

PubMed Central

DNA methylation and histone modifications are central to epigenetic gene regulation, which has been shown to play a crucial role in development. Epigenetics has often been discussed in the context of the maintenance of cell identity because of the heritable nature of gene expression status. Indeed, crucial roles of the epigenetic machinery in establishment and maintenance of particular lineages during early development have been well documented. However, unexpected observation of a developmental plasticity retained in mature T lymphocytes, in particular in CD4+ T-cell subsets, by recent studies is accelerating studies that focus on roles of each epigenetic pathway in cell fate decisions of T lymphocytes. Here, we focus on the repressive epigenetic machinery, i.e. DNA methylation, histone deacetylation, H3K9 methylation and Polycomb repressive complexes, and briefly review the studies examining the role of these mechanisms during T-lymphocyte differentiation. We also discuss the current challenges faced when analysing the function of the epigenetic machinery and potential directions to overcome the problems. PMID:23278842

Naito, Taku; Taniuchi, Ichiro

2013-01-01

480

Time-frequency manifold for nonlinear feature extraction in machinery fault diagnosis  

NASA Astrophysics Data System (ADS)

Time-frequency feature is beneficial to representation of non-stationary signals for effective machinery fault diagnosis. The time-frequency distribution (TFD) is a major tool to reveal the synthetic time-frequency pattern. However, the TFD will also face noise corruption and dimensionality reduction issues in engineering applications. This paper proposes a novel nonlinear time-frequency feature based on a time-frequency manifold (TFM) technique. The new TFM feature is generated by mainly addressing manifold learning on the TFDs in a reconstructed phase space. It combines the non-stationary information and the nonlinear information of analyzed signals, and hence exhibits valuable properties. Specifically, the new feature is a quantitative low-dimensional representation, and reveals the intrinsic time-frequency pattern related to machinery health, which can effectively overcome the effects of noise and condition variance issues in sampling signals. The effectiveness and the merits of the proposed TFM feature are confirmed by case study on gear wear diagnosis, bearing defect identification and defect severity evaluation. Results show the value and potential of the new feature in machinery fault pattern representation and classification.

He, Qingbo

2013-02-01

481

Vibration Sensor Data Denoising Using a Time-Frequency Manifold for Machinery Fault Diagnosis  

PubMed Central

Vibration sensor data from a mechanical system are often associated with important measurement information useful for machinery fault diagnosis. However, in practice the existence of background noise makes it difficult to identify the fault signature from the sensing data. This paper introduces the time-frequency manifold (TFM) concept into sensor data denoising and proposes a novel denoising method for reliable machinery fault diagnosis. The TFM signature reflects the intrinsic time-frequency structure of a non-stationary signal. The proposed method intends to realize data denoising by synthesizing the TFM using time-frequency synthesis and phase space reconstruction (PSR) synthesis. Due to the merits of the TFM in noise suppression and resolution enhancement, the denoised signal would have satisfactory denoising effects, as well as inherent time-frequency structure keeping. Moreover, this paper presents a clustering-based statistical parameter to evaluate the proposed method, and also presents a new diagnostic approach, called frequency probability time series (FPTS) spectral analysis, to show its effectiveness in fault diagnosis. The proposed TFM-based data denoising method has been employed to deal with a set of vibration sensor data from defective bearings, and the results verify that for machinery fault diagnosis the method is superior to two traditional denoising methods. PMID:24379045

He, Qingbo; Wang, Xiangxiang; Zhou, Qiang

2014-01-01

482

National Safe Tractor and Machinery Operation Program: development and content evaluation.  

PubMed

Guidelines in the U.S. Department of Labor's Hazardous Occupations Order in Agriculture (AgHO) regulations state that youth can receive tractor safety certification after participating in a 10-hour course, or receive tractor and machinery safety certification after participating in a 20-hour course. An additional four hours of orientation to on-farm hazards and general safety is required to receive full certification in a 24-hour course. Previous research has shown that traditional safety education certification programs were conducted with non-standardized methods and old curriculum materials. The objective of the National Safe Tractor and Machinery Operation Program (NSTMOP) project was to design an effective, efficient, and accountable youth farm machinery certification program with national uniformity and a single set of economically producible instructional materials with demonstrated content validity. The format for the NSTMOP project was guided by focus groups, a national steering committee, and selected agricultural safety educators. Primary curriculum materials include a task sheet format, and new skills and driving evaluations. Data analysis indicates that the instructional materials, the instructional plan, and the evaluation of student participants satisfactorily met the objectives of the NSTMOP project and the AgHO regulations. PMID:18788334

Garvey, P M; Murphy, D J; Yoder, A M; Hilton, J W

2008-07-01

483

Required Rotations 1. Emergency Rotation. Each resident has a 52 week rotation approximate (8 hours per week  

E-print Network

problems. 2. Oral Surgery Rotation at EDC. Each resident has a 3 month rotation (8 hours per week) in Oral Surgery focusing on surgical removal of third molars (rotation can be extended). ResidentsROTATIONS Required Rotations 1. Emergency Rotation. Each resident has a 52 week rotation

Goldman, Steven A.

484

Wave-driven Rotation in Supersonically Rotating Mirrors  

SciTech Connect

Supersonic rotation in mirrors may be produced by radio frequency waves. The waves produce coupled diffusion in ion kinetic and potential energy. A population inversion along the diffusion path then produces rotation. Waves may be designed to exploit a natural kinetic energy source or may provide the rotation energy on their own. Centrifugal traps for fusion and isotope separation may benefit from this wave-driven rotation.

A. Fetterman and N.J. Fisch

2010-02-15

485

Multi-state targeting machinery govern the fidelity and efficiency of protein localization.  

PubMed

Proper localization of newly synthesized proteins is essential to cellular function. Among different protein localization modes, the signal recognition particle (SRP) and SRP receptor (SR) constitute the conserved targeting machinery in all three life kingdoms and mediate about one third of the protein targeting reactions. Based on experimental and computational studies, a detailed molecular model is proposed to explain how this molecular machinery governs the efficiency and fidelity of protein localizations. In this targeting machinery, two distinct SRP GTPases are contained into the SRP and SR that are responsible to the interactions between SRP and SR. These two GTPases can interact with one another through a series of sequential and discrete interaction states that are the early intermediate formation, stable complex association, and GTPase activation. In contrast to canonical GTPases, a floppy and open conformation adopted in free SRP GTPases can facilitate efficient GTP/GDP exchange without the aid of any external factors. As the apo-form free SRP GTPases can adopt the conformational states of GDP- or GTP-bound form, the binding of GTP/GDP follows a mechanism of conformational selection. In the first step of complex formation, the two SRP GTPases can rapidly assemble into an unstable early intermediate by selecting and stabilizing one another's primed states from the equilibrium conformational ensemble. Subsequently, extensive inter- and intra-domain changes rearrange the early complex into a tight and closed state of stable complex through induced fit mechanism. Upon stable complex association, further tune of several important interaction networks activates the SRP GTPase for GTP hydrolysis. These different conformational states are coupled to corresponding protein targeting events, in which the complex formation deliveries the translating ribosome to the target membrane and the GTPase activation couples to the cargo release from SRP-SR machinery to the translocation channel. It is thus suggested that the SRP GTPases constitute a self-sufficient system to execute exquisite spatial and temporal control of the complex targeting process. The working mechanism of the SRP and SR provides a novel paradigm of how the protein machinery functions in controlling diverse biological processes efficiently and faithfully. PMID:24446370

Yang, Mingjun; Pang, Xueqin; Han, Keli

2014-01-01

486

Sodium concrete reaction: structural considerations  

SciTech Connect

An overview of the sodium concrete reaction phenomenon, with emphasis on structural considerations, is presented. Available test results for limestone, basalt, and magnetite concrete with various test article configurations are reviewed. Generally, tests indicate reaction is self limiting before all sodium is used. Uncertainties, however, concerning the mechanism for penetration of sodium into concrete have resulted in different theories about a reaction model. Structural behavior may be significant in the progression of the reaction due to thermal-structural-chemical interactions involving tensile cracking, compressive crushing, or general deterioration of concrete and the exposure of fresh concrete surfaces to react with sodium. Structural behavior of test articles and potential factors that could enhance the progression of the reaction are discussed.

Freskakis, G.N.

1984-09-01

487

Hypoxia and persistent sodium current  

Microsoft Academic Search

During prolonged depolarization of excitable cells, some voltage-activated, tetrodotoxin-sensitive sodium channels are resistant to inactivation and can continue to open for long periods of time, generating a \\

Anna K. Hammarström; Peter W. Gage

2002-01-01

488

Photons in polychromatic rotating modes  

NASA Astrophysics Data System (ADS)

We propose a quantum theory of rotating light beams and study some of its properties. Such beams are polychromatic and have either a slowly rotating polarization or a slowly rotating transverse mode pattern. We show that there are, for both cases, three different natural types of modes that qualify as rotating, one of which is a type not previously considered. We discuss differences between these three types of rotating modes on the one hand and nonrotating modes as viewed from a rotating frame of reference on the other. We present various examples illustrating the possible use of rotating photons, mostly for quantum information processing purposes. We introduce in this context a rotating version of the two-photon singlet state.

van Enk, S. J.; Nienhuis, G.

2007-11-01

489

A-type rotator properties  

NASA Astrophysics Data System (ADS)

We discuss the measurement of rotational velocities, and the different samples available for A-type stars. The distributions of rotational velocities, their evolution with time and link with chemical peculiarities are reviewed. Effects of gravity darkening are also detailed.

Royer, F.

2014-11-01

490

Viscosity of Molten Sodium Nitrate  

NASA Astrophysics Data System (ADS)

New experimental data for the viscosity of molten sodium nitrate from its melting point up to 752 K, at atmospheric pressure, with an estimated uncertainty of 2.1%, were measured with an oscillating cup viscometer. A preliminary reference correlation and reference data are proposed, based on the best available data for the viscosity of molten sodium nitrate, for temperatures between 590 and 750 K, with an estimated absolute uncertainty of 0.066 mPa · s ( k = 2).

Nunes, V. M. B.; Lourenço, M. J. V.; Santos, F. J. V.; de Castro, C. A. Nieto

2006-11-01

491

Protein kinase c increases the apparent affinity of the release machinery to Ca2+ by enhancing the release machinery downstream of the Ca2+ sensor.  

PubMed

Modulation of the release probability of releasable vesicles in response to Ca(2+) influx (Prob(Ca)) is involved in mediating several forms of synaptic plasticity, including short-term depression, short-term augmentation, and potentiation induced by protein kinases. Given such an important role, however, the mechanism underlying modulation of the Prob(Ca) is unclear. We addressed this question by investigating how the activation of protein kinase C modulates the Prob(Ca) at a calyx-type nerve terminal in rat brainstem. Various lengths of step depolarization were applied to the nerve terminal to evoke different amounts of Ca(2+) currents and capacitance jumps, the latter of which reflect vesicle release. The relationship between the capacitance jump and the Ca(2+) current integral was sigmoidal and was fit well with a Hill function. The sigmoidal relationship was shifted significantly to the left during the application of the PKC activator 12-myristate 13-acetate (PMA), suggesting that PMA increases the apparent affinity of the release machinery to Ca(2+). This effect was blocked in large part by the application of the PKC inhibitor bisindolylmaleimide, suggesting that the effect is mediated mainly by the activation of PKC. We also found that PMA increased the rate of miniature EPSCs evoked by the application of hypertonic sucrose solution, which triggers release downstream of the Ca(2+) influx. Taken together, our results suggest that PKC enhances the apparent affinity of the release machinery to Ca(2+) by a mechanism downstream of the binding between Ca(2+) and its sensor. These results have provided the first example of the mechanisms underlying modulation of the Prob(Ca). PMID:11588166

Wu, X S; Wu, L G

2001-10-15

492

Muon spin rotation studies  

NASA Astrophysics Data System (ADS)

The bulk of the muon spin rotation research work centered around the development of the muon spin rotation facility at the Alternating Gradient Synchrotron (AGS) of Brookhaven National Laboratory (BNL). The collimation system was both designed and fabricated at Virginia State University. This improved collimation system, plus improvements in detectors and electronics enabled the acquisition of spectra free of background out to 15 microseconds. There were two runs at Brookhaven in 1984, one run was devoted primarily to beam development and the other run allowed several successful experiments to be performed. The effect of uniaxial strain on an Fe(Si) crystal at elevated temperature (360K) was measured and the results are incorporated herein. A complete analysis of Fe pulling data taken earlier is included.

1984-12-01

493

Faraday Optical Rotation  

NSDL National Science Digital Library

In this experiment students measure the effects of a magnetic field on the polarization of light (laser beam) propagating through, or reflected from, a solid transparent medium. The effect can be explained in terms of a simple model that relates the "optical activity" of the medium to the applied magnetic field. Students learn about â¢Rotation of linearly polarized light by electromagnetic fields â¢Connection to Zeeman Effect â¢Atomic model of light propagation in dielectrics. Prof. Paul R. Berman of The University of Michigan, Ann Arbor, has recently published (March 2010) an American Journal of Physics article on three different calculations of the Optical Faraday Rotation (please see link below.) Students are strongly encouraged to study this article.

2010-03-25

494

Rotational spectrum of tryptophan  

NASA Astrophysics Data System (ADS)

The rotational spectrum of the natural amino acid tryptophan has been observed for the first time using a combination of laser ablation, molecular beams, and Fourier transform microwave spectroscopy. Independent analysis of the rotational spectra of individual conformers has conducted to a definitive identification of two different conformers of tryptophan, with one of the observed conformers never reported before. The analysis of the 14N nuclear quadrupole coupling constants is of particular significance since it allows discrimination between structures, thus providing structural information on the orientation of the amino group. Both observed conformers are stabilized by an O-H...N hydrogen bond in the side chain and a N-H...? interaction forming a chain that reinforce the strength of hydrogen bonds through cooperative effects.

Sanz, M. Eugenia; Cabezas, Carlos; Mata, Santiago; Alonso, Josè L.

2014-05-01

495

A translational polarization rotator.  

PubMed

We explore a free-space polarization modulator in which a variable phase is introduced between the right- and left-handed circular polarization components and used to rotate the linear polarization of the outgoing beam relative to that of the incoming beam. In this device, the polarization states are separated by a circular polarizer that consists of a quarter-wave plate in combination with a wire grid. A movable mirror is positioned behind and parallel to the circular polarizer. As the polarizer-mirror distance is changed, an incident linear polarization will be rotated through an angle that is proportional to the introduced phase delay. We demonstrate a prototype device that modulates Stokes Q and U over a 20% bandwidth, from 77 to 94 GHz. PMID:23033098

Chuss, David T; Wollack, Edward J; Pisano, Giampaolo; Ackiss, Sheridan; U-Yen, Kongpop; Ng, Ming wah

2012-10-01

496

Rotatable seal assembly  

DOEpatents

An assembly is provided for rotatably supporting a rotor on a stator so that vacuum chambers in the rotor and stator remain in communication while the chambers are sealed from ambient air, which enables the use of a ball bearing or the like to support most of the weight of the rotor. The apparatus includes a seal device mounted on the rotor to rotate therewith, but shiftable in position on the rotor while being sealed to the rotor as by an O-ring. The seal device has a flat face that is biased towards a flat face on the stator, and pressurized air is pumped between the faces to prevent contact between them while spacing them a small distance apart to avoid the inflow of large amounts of air between the faces and into the vacuum chambers.

Logan, Clinton M. (Pleasanton, CA); Garibaldi, Jack L. (Livermore, CA)

1982-01-01

497

Rotational spectrum of paracetamol.  

PubMed

In this paper we report the first rotational spectrum of isolated paracetamol. Solid samples of paracetamol were vaporized by laser ablation, expanded in a supersonic jet and characterized by Fourier transform microwave spectroscopy in the 4-10 GHz frequency range. The spectra of a total of four conformers, two with a trans peptidic -CO-NH- functional group arrangement and two with a cis peptidic group arrangement have been observed for the first time. The identification of all the conformers was based on the comparison of the experimental rotational and (14)N quadrupole coupling constants with those predicted by ab initio calculations, and relative values of their electrical dipole moment components. PMID:23746213

Varela, Marcelino; Cabezas, Carlos; López, Juan C; Alonso, José Luis

2013-12-19

498

Rotating Connection for Electrical Cables  

NASA Technical Reports Server (NTRS)

Cable reel provides electrical connections between fixed structure and rotating one. Reel carries power and signal lines while allowing rotating structure to turn up to 360 degrees with respect to fixed structure. Reel replaces sliprings. Can be used to electrically connect arm of robot with body. Reel releases cable to rotating part as it turns and takes up cable as rotating part comes back to its starting position, without tangling, twisting, or kinking.

Manges, D. R.

1986-01-01

499

Rotator Cuff and Impingement  

Microsoft Academic Search

Shoulder pain due to trauma or overuse is a common complaint in the populations of athletes in general, with a variety of\\u000a causes that are frequently diffi cult to differentiate by physical examination alone.\\u000a \\u000a MR imaging and ultrasonography are optimal and complementary tools to discriminate different forms of impingement and to localize\\u000a and classify rotator cuff injuries. A native MR

Henk-Jan Van der Woude; Diana G. Franssen-Franken; W. Jaap Willems

500

Slowly rotating white holes  

Microsoft Academic Search

A model of gravitationally anticollapsing objects, white holes, is constructed on the basis of the Kerr metric in the limit\\u000a of small rotation with a corresponding interior metric. The extended space-time manifold is considered and the spectral shift\\u000a of radiation from the point of view of a remote observer is calculated for different parameters of such white holes.

V S Gurin

1992-01-01