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1

Theory and Design of Electrical Rotating Machinery.  

National Technical Information Service (NTIS)

The objective of the program is to contribute toward new and improved rotating machines for Naval applications, with emphasis on superconducting machinery. Work has been performed on the theory of ac losses in multifilament superconductors and experiments...

W. J. Carr

1976-01-01

2

Theory and Design of Electrical Rotating Machinery.  

National Technical Information Service (NTIS)

The objective of this program is to contribute toward new and improved rotating machines for Naval applications, with emphasis on superconduting machinery. Work has been performed on the theory of ac losses in multifilament superconductors and experiments...

W. J. Carr

1977-01-01

3

Condition Monitoring for Rotational Machinery  

Microsoft Academic Search

Vibrating screens are industrial machines used to sort aggregates through their high rotational accelerations. Utilized in mining operations, they are able to screen dozens of tonnes of material per hour. To enhance maintenance and troubleshooting, this thesis introduces a vibration based condition monitoring system capable of observing machine operation. Using acceleration data collected from remote parts of the machine, software

Daniel C Volante

2011-01-01

4

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

5

Active Balancing and Vibration Control of Rotating Machinery: A Survey  

Microsoft Academic Search

Vibration suppression of rotating machinery is an important engineering problem. In this paper, a review of the research work performed in real-time active balanc- ing and active vibration control for rotating machinery, as well as the research work on dynamic modeling and analy- sis techniques of rotor systems, is presented. The basic methodology and a brief assessment of major difficulties

Shiyu Zhou; Jianjun Shi

2001-01-01

6

Analysis and remedies for torsional oscillations in rotating machinery  

Microsoft Academic Search

In the context of operation of rotating machinery vibrations are inevitable. Consequences of long-term operation under cyclic loads are often catastrophic, as the fatigue stress of machinery elements may lead to breakdowns. It is well known that the level of vibrations should be minimised either by passive design of the system or by active damping efforts. The work presented in

Arkadiusz Dutka; Michal Orkisz

2011-01-01

7

Magnetic Actuator Modelling for Rotating Machinery Analysis  

NASA Astrophysics Data System (ADS)

Rotating machines have a wide range of application such as airplanes, factories, laboratories and power plants. Lately, with computer aid design, shafts finite element models including bearings, discs, seals and couplings have been developed, allowing the prediction of the machine behavior. In order to keep confidence during operation, it is necessary to monitor these systems, trying to predict future failures. One of the most applied technique for this purpose is the modal analysis. It consists of applying a perturbation force into the system and then to measure its response. However, there is a difficulty that brings limitations to the excitation of systems with rotating shafts when using impact hammers or shakers, once due to friction, undesired tangential forces and noise can be present in the measurements. Therefore, the study of a non-contact technique of external excitation becomes of high interest. In this sense, the present work deals with the study and development of a finite element model for rotating machines using a magnetic actuator as an external excitation source. This work also brings numerical simulations where the magnetic actuator was used to obtain the frequency response function of the rotating system.

Mendes, Ricardo Ugliara; de Castro, Hélio Fiori; Cavalca, Kátia Lucchesi; Ferreira, Luiz Otávio Saraiva

8

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

9

Strength of modes in rotating machinery  

NASA Astrophysics Data System (ADS)

A new method for the analysis of modal strength of the rotor systems with periodically time-varying parameters due to the presence of either rotating or stationary asymmetry is proposed. The method is based on the complete development of the modal analysis by introducing the modulated coordinates to derive the equivalent infinite-order time-invariant Hill's matrix equation from the finite-order time-varying matrix equation. Depending upon the level of possible contribution of each mode to forced response, the modal strength of a mode is rigorously derived from the norm order analysis of the associated eigenvector; thereby, the modes are classified as strong or weak modes. It is shown that the directional frequency response functions are useful in identifying the strength of modes in detail, or equivalently, the modes of symmetry, anisotropy, asymmetry and coupled asymmetry. Two illustrative examples with a simple, yet general, analysis rotor model and a practical flexible asymmetric rotor finite element (FE) model with an open transverse crack are treated to demonstrate the theoretical findings and effectiveness of the proposed method.

Lee, Chong-Won; Han, Dong-Ju

2008-06-01

10

Guidelines for meeting emission regulations for rotating machinery with mechanical seals  

NASA Astrophysics Data System (ADS)

Mechanical seals have played a major role during many years in minimizing emissions to atmosphere in rotating machinery. A review is presented of the continuing innovations and new technologies to improve mechanical seal performance in terms of emissions.

11

Vibration Reduction of Rotating Machinery by Using Viscoelastic Material Support  

NASA Astrophysics Data System (ADS)

The demand for silent machine operation in any of the organization is prime need in today's environmentally conscious world. The legal aspects of noise control requires a silent and noise free operation of the machine. The vibration and noise resulted due to it is the common phenomena in any dynamic machinery. In this paper an attempt has been made to found a suitable Viscoelastic material which can minimize the vibration and results into less noise and efficient operation.

Jadhav, Sainand M.; Nikhade, Sanjay D.; Kanase, Sandip S.

2013-03-01

12

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

SciTech Connect

Topics addressed include rotordynamic software, blade loss dynamics of a magnetically supported rotor, flow visualization in a single simulated brush seal, an analytical investigation of a cryogenic journal bearing, vibration protection of aeration turbine gear motor, a simple procedure for assessing rotor stability, and stability of rotating cylindrical shells including nonlinear stiffening. Attention is also given to aeroelastic analysis of vertical axis wind turbines, an active chamber system for vibration control of rotating machinery, a computer system for multibearing rotor design, equations of motion of a flexible rotor with axially loose disc, and simulation research on the dynamic characteristics of a steam-injected gas turbine.

Kim, J.H.; Yang, W.J.

1992-01-01

13

Vibration monitoring of EDF rotating machinery using artificial neural networks  

SciTech Connect

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. Earlydetection 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. [Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering; Hamon, L.; Lefevre, F. [Electricite de France, 78 - Chatou (France). Direction des Etudes et Recherches

1991-12-31

14

Vibration monitoring of EDF rotating machinery using artificial neural networks  

SciTech Connect

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. Earlydetection 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. (Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering); Hamon, L.; Lefevre, F. (Electricite de France, 78 - Chatou (France). Direction des Etudes et Recherches)

1991-01-01

15

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

16

Lubrication and wear characteristics of power plant rotating machinery. (Latest citations from Fluidex). Published Search  

SciTech Connect

The bibliography contains citations concerning the lubrication and wear of rotating machinery parts. Topics include the effects of lubricants on bearings and the resulting friction effects on fuel consumption. The use of hard surfacing for wear resistance is considered. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

NONE

1996-03-01

17

Application of the EEMD method to rotor fault diagnosis of rotating machinery  

Microsoft Academic Search

Empirical mode decomposition (EMD) is a self-adaptive analysis method for nonlinear and non-stationary signals. It may decompose a complicated signal into a collection of intrinsic mode functions (IMFs) based on the local characteristic time scale of the signal. The EMD method has attracted considerable attention and been widely applied to fault diagnosis of rotating machinery recently. However, it cannot reveal

Yaguo Lei; Zhengjia He; Yanyang Zi

2009-01-01

18

Misalignment diagnosis of rotating machinery through vibration analysis via the hybrid EEMD and EMD approach  

Microsoft Academic Search

The objective of this research is to investigate the feasibility of utilizing the hybrid method of ensemble empirical mode decomposition (EEMD) and pure empirical mode decomposition (EMD) to efficiently decompose the complicated vibration signals of rotating machinery into a finite number of intrinsic mode functions (IMFs), so that the fault characteristics of the misaligned shaft can be examined in the

T. Y. Wu; Y. L. Chung

2009-01-01

19

Fault diagnosis of rotating machinery using an improved HHT based on EEMD and sensitive IMFs  

Microsoft Academic Search

A Hilbert-Huang transform (HHT) is a time-frequency technique and has been widely applied to analyzing vibration signals in the field of fault diagnosis of rotating machinery. It analyzes the vibration signals using intrinsic mode functions (IMFs) extracted using empirical mode decomposition (EMD). However, EMD sometimes cannot reveal the signal characteristics accurately because of the problem of mode mixing. Ensemble empirical

Yaguo Lei; Ming J. Zuo

2009-01-01

20

FAULT FEATURES OF LARGE ROTATING MACHINERY AND DIAGNOSIS USING SENSOR FUSION  

Microsoft Academic Search

Large rotating machinery such as turbines and compressors are the key equipment in oil refineries, power plants, and chemical engineering plants. To minimize the economic loss incurred because of the defects of malfunctions of these machines, diagnosis is very important. Currently, diagnosis is carried out mainly using spectral analysis. In spite of being effective in detecting the faults (monitoring), spectral

Y. D. Chen; R. Du; L. S. Qu

1995-01-01

21

Vibration control of rotating machinery using active tilting-pad bearings  

Microsoft Academic Search

An active hybrid tilting-pad bearing, together with the rotor and the hydraulic system, is modeled and simulated. The main objective of the active device is the reduction of vibration amplitude in rotating machinery. The active action is based on injecting pressurized oil into the bearing gap through orifices machined in the pads. Numerical results show an effective vibration reduction in

Rodrigo Nicoletti; Ilmar Ferreira Santos

2001-01-01

22

Fault diagnosis of rotating machinery using an intelligent order tracking system  

Microsoft Academic Search

This research focuses on the development of an intelligent diagnostic system for rotating machinery. The system is composed of a signal processing module and a state inference module. In the signal processing module, the recursive least square (RLS) algorithm and the Kalman filter are exploited to extract the order amplitudes of vibration signals, followed by fault classification using the fuzzy

Mingsian Bai; Jiamin Huang; Minghong Hong; Fucheng Su

2005-01-01

23

LMD Method and Multi-Class RWSVM of Fault Diagnosis for Rotating Machinery Using Condition Monitoring Information  

PubMed Central

Timely and accurate condition monitoring and fault diagnosis of rotating machinery are very important to maintain a high degree of availability, reliability and operational safety. This paper presents a novel intelligent method based on local mean decomposition (LMD) and multi-class reproducing wavelet support vector machines (RWSVM), which is applied to diagnose rotating machinery faults. First, the sensor-based vibration signals measured from the rotating machinery are preprocessed by the LMD method and product functions (PFs) are produced. Second, statistic features are extracted to acquire more fault characteristic information from the sensitive PF. Finally, these features are fed into a multi-class RWSVM to identify the rotating machinery health conditions. The experimental results validate the effectiveness of the proposed RWSVM method in identifying rotating machinery fault patterns accurately and effectively and its superiority over that based on the general SVM.

Liu, Zhiwen; Chen, Xuefeng; He, Zhengjia; Shen, Zhongjie

2013-01-01

24

Fault diagnosis of rotating machinery using an improved HHT based on EEMD and sensitive IMFs  

NASA Astrophysics Data System (ADS)

A Hilbert-Huang transform (HHT) is a time-frequency technique and has been widely applied to analyzing vibration signals in the field of fault diagnosis of rotating machinery. It analyzes the vibration signals using intrinsic mode functions (IMFs) extracted using empirical mode decomposition (EMD). However, EMD sometimes cannot reveal the signal characteristics accurately because of the problem of mode mixing. Ensemble empirical mode decomposition (EEMD) was developed recently to alleviate this problem. The IMFs generated by EEMD have different sensitivity to faults. Some IMFs are sensitive and closely related to the faults but others are irrelevant. To enhance the accuracy of the HHT in fault diagnosis of rotating machinery, an improved HHT based on EEMD and sensitive IMFs is proposed in this paper. Simulated signals demonstrate the effectiveness of the improved HHT in diagnosing the faults of rotating machinery. Finally, the improved HHT is applied to diagnosing an early rub-impact fault of a heavy oil catalytic cracking machine set, and the application results prove that the improved HHT is superior to the HHT based on all IMFs of EMD.

Lei, Yaguo; Zuo, Ming J.

2009-12-01

25

Application of the EEMD method to rotor fault diagnosis of rotating machinery  

NASA Astrophysics Data System (ADS)

Empirical mode decomposition (EMD) is a self-adaptive analysis method for nonlinear and non-stationary signals. It may decompose a complicated signal into a collection of intrinsic mode functions (IMFs) based on the local characteristic time scale of the signal. The EMD method has attracted considerable attention and been widely applied to fault diagnosis of rotating machinery recently. However, it cannot reveal the signal characteristic information accurately because of the problem of mode mixing. To alleviate the mode mixing problem occurring in EMD, ensemble empirical mode decomposition (EEMD) is presented. With EEMD, the components with truly physical meaning can be extracted from the signal. Utilizing the advantage of EEMD, this paper proposes a new EEMD-based method for fault diagnosis of rotating machinery. First, a simulation signal is used to test the performance of the method based on EEMD. Then, the proposed method is applied to rub-impact fault diagnosis of a power generator and early rub-impact fault diagnosis of a heavy oil catalytic cracking machine set. Finally, by comparing its application results with those of the EMD method, the superiority of the proposed method based on EEMD is demonstrated in extracting fault characteristic information of rotating machinery.

Lei, Yaguo; He, Zhengjia; Zi, Yanyang

2009-05-01

26

Approximate entropy as a nonlinear feature parameter for fault diagnosis in rotating machinery  

NASA Astrophysics Data System (ADS)

Feature extraction is always a crucial step for fault diagnosis in rotating machinery. When faults occur, rotating machinery always manifests nonlinear dynamic behavior. It is necessary to extract the nonlinear features hidden in the vibration signal for more accurate diagnosis. Approximate entropy (ApEn) is the nonlinear parameter identification method for measuring the irregularity of the stochastic signal or the stochastic process. In this paper, ApEn is used as a nonlinear feature parameter to measure the irregularity of the vibration signals for fault diagnosis in rotating machinery. Four typical faults are considered, which are imbalance, misalignment, shaft rubbing and oil whirl. To improve the distinguishability of the ApEn values of the different faults, the empirical mode decomposition (EMD) method is used to remove the basic frequency component from the signals of the various faults. The experimental study results demonstrate that EMD can separate the basic frequency component from the original signals satisfactorily. After removing the basic frequency component, the distinguishability of the ApEn values of the residual signals is improved greatly. The proposed strategy for the ApEn calculation of the various faults is proved effective. In addition, the simulation study is presented to investigate some characteristics of ApEn, which will benefit better application of ApEn in the field of fault diagnosis.

He, Yongyong; Huang, Jun; Zhang, Bo

2012-04-01

27

An improved EEMD with multiwavelet packet for rotating machinery multi-fault diagnosis  

NASA Astrophysics Data System (ADS)

Multi-fault identification is a challenge for rotating machinery fault diagnosis. The vibration signals measured from rotating machinery usually are complex, non-stationary and nonlinear. Especially, the useful multi-fault features are too weak to be identified at the early stage. In this paper, a novel method called improved EEMD with multiwavelet packet for rotating machinery multi-fault diagnosis is proposed. Using multiwavelet packet as the pre-filter to improve EEMD decomposition results, multiwavelet packet decomposes the vibration signal into a series of narrow frequency bands and enhances the weak multi-fault characteristic components in the different narrow frequency bands. By selecting the proper added noise amplitude according to the vibration characteristics, EEMD is further improved to increase the accuracy and effectiveness of its decomposition results. The proposed method is applied to analyze the multi-fault of a blade rotor experimental setup and an industrial machine set, and the results confirm the advantage of the proposed method over EEMD, EEMD with multiwavelet packet, Hilbert-Huang transform and multiwavelet packet transform for multi-fault diagnosis.

Jiang, Hongkai; Li, Chengliang; Li, Huaxing

2013-04-01

28

Multivariate EMD and full spectrum based condition monitoring for rotating machinery  

NASA Astrophysics Data System (ADS)

Early assessment of machinery health condition is of paramount importance today. A sensor network with sensors in multiple directions and locations is usually employed for monitoring the condition of rotating machinery. Extraction of health condition information from these sensors for effective fault detection and fault tracking is always challenging. Empirical mode decomposition (EMD) is an advanced signal processing technology that has been widely used for this purpose. Standard EMD has the limitation in that it works only for a single real-valued signal. When dealing with data from multiple sensors and multiple health conditions, standard EMD faces two problems. First, because of the local and self-adaptive nature of standard EMD, the decomposition of signals from different sources may not match in either number or frequency content. Second, it may not be possible to express the joint information between different sensors. The present study proposes a method of extracting fault information by employing multivariate EMD and full spectrum. Multivariate EMD can overcome the limitations of standard EMD when dealing with data from multiple sources. It is used to extract the intrinsic mode functions (IMFs) embedded in raw multivariate signals. A criterion based on mutual information is proposed for selecting a sensitive IMF. A full spectral feature is then extracted from the selected fault-sensitive IMF to capture the joint information between signals measured from two orthogonal directions. The proposed method is first explained using simple simulated data, and then is tested for the condition monitoring of rotating machinery applications. The effectiveness of the proposed method is demonstrated through monitoring damage on the vane trailing edge of an impeller and rotor-stator rub in an experimental rotor rig.

Zhao, Xiaomin; Patel, Tejas H.; Zuo, Ming J.

2012-02-01

29

Misalignment diagnosis of rotating machinery through vibration analysis via the hybrid EEMD and EMD approach  

NASA Astrophysics Data System (ADS)

The objective of this research is to investigate the feasibility of utilizing the hybrid method of ensemble empirical mode decomposition (EEMD) and pure empirical mode decomposition (EMD) to efficiently decompose the complicated vibration signals of rotating machinery into a finite number of intrinsic mode functions (IMFs), so that the fault characteristics of the misaligned shaft can be examined in the time-frequency Hilbert spectrum as well as the marginal Hilbert spectrum. The intrawave frequency modulation (FM) phenomenon, which indicates the nonlinear vibration behavior of a misaligned shaft, can be observed in the time-frequency Hilbert spectrum through the Hilbert-Huang transform (HHT) technique. The fault characteristic of shaft misalignment is also featured in terms of the amplitude modulation (AM) phenomenon in the information-containing IMF components that are extracted by the significance test. Through performing the envelope analysis on the information-containing IMF, the marginal Hilbert spectrum of the envelope signal of this IMF component exhibits that the level of shaft misalignment is presented by the level of AM in the IMF. A test bed of a rotor-bearing system is performed experimentally to illustrate both the parallel and angular shaft misalignment conditions as well as the healthy condition. The analysis results show that the proposed approach is capable of diagnosing the misaligned fault of the shaft in rotating machinery and providing a more meaningful physical insight compared with the conventional methods.

Wu, T. Y.; Chung, Y. L.

2009-09-01

30

A new procedure for extracting fault feature of multi-frequency signal from rotating machinery  

NASA Astrophysics Data System (ADS)

Modern rotating machinery is built as a multi-rotor and multi-bearing system, and complex factors from rub or misalignment fault, etc., can lead to high nonlinearity of the system and non-stationarity of vibration signals. As a wide spectrum of frequency components is likely generated due to these complex factors, feature extraction becomes very important for fault diagnosis of a rotor system, e.g., rotor-to-stator rub and rotor misalignment. In recent years, the Hilbert-Huang transform (HHT), combining the empirical mode decomposition (EMD) algorithm with the Hilbert transform (HT) is commonly used in vibration signal analysis and also turns out to be very effective in dealing with non-stationary signals. Nevertheless, most intrinsic mode functions (IMFs) from the EMD are multi-frequency, and the extracted instantaneous frequency (IF) curves usually show irregularities, which raises difficulty in interpreting these features of the signal by the HHT spectrogram. In this study, a new procedure, combining the customary HHT with a fourth-order spectral analysis tool named Kurtogram, is developed to extract high-frequency features from several kinds of faulty signals, where the Kurtogram is applied to locate the non-stationary intra- and inter-wave modulation components in the original signals and produce more monochromatic IMFs. It is shown that the newly developed feature extraction procedure can accurately detect and characterize the fault feature information hidden in a multi-frequency signal, which is validated by a rub test from a rotor-bearing assembly and a misalignment signal test from a turbo-compressor machine set.

Xiong, Xin; Yang, Shixi; Gan, Chunbiao

2012-10-01

31

THE ENHANCEMENT OF IMPULSIVE NOISE AND VIBRATION SIGNALS FOR FAULT DETECTION IN ROTATING AND RECIPROCATING MACHINERY  

Microsoft Academic Search

Impulsive sound and vibration signals in machinery are often caused by the impacting of components and are commonly associated with faults. It has long been recognized that these signals can be gainfully used for fault detection. However, it tends to be difficult to make objective measurements of impulsive signals because of the high levels of background noise. This paper presents

S. K. Lee; P. R. White

1998-01-01

32

Vibration Study of Rotating Machinery to Aid in Shipboard Vibration Problems.  

National Technical Information Service (NTIS)

A mathematical model was made of a piece of rotating equipment to determine the vibration characteristics of the actual machine and to determine how such vibrations might be controlled, thus leading to quiet operation on shipboard. A 64 KW. Allis-Chalmers...

1967-01-01

33

Fiber optic rotary motion sensor for the real-time condition monitoring of rotating machinery  

Microsoft Academic Search

This paper describes the operating principle and construction of a new type of rotary motion sensor. This novel optical device is based on a patented evolution of the high precision optical shaft encoder. It integrates highly accurate measurement of the angular position and 2D center position of a rotating shaft. The current work described is aimed specifically at using this

P. A. Orton; Kayode A. Ayandokun; Nasser Sherkat; Peter D. Thomas

1994-01-01

34

Accuracy of Fault Detection in Real Rotating Machinery Using Model Based Diagnostic Techniques  

NASA Astrophysics Data System (ADS)

An experimental validation of a model based identification technique is presented in this paper. The validation is performed on both real machines, like large steam and gas turbogenerators, and test rigs. The aim is to show that the method is able to locate the actual fault, to evaluate its severity and to discriminate among faults that have similar symptoms. A quantitative index, called residual is introduced to evaluate the accuracy of the performed identification. The actual developing faults taken into account are some of the most common on rotating machines such as unbalances, thermal bows, fatigue cracks and radial and angular misalignments of couplings.

Bachschmid, Nicolò; Pennacchi, Paolo

35

Effect of Coude Pupil Rotation on Sodium Laser Beacon Perspective Elongation.  

National Technical Information Service (NTIS)

This research models a sodium laser guide star and its measurement by a Shack-Hartmann wavefront sensor. By predicting the extent of beacon elongation and Coude rotation, reference images are produced for each subaperture throughout an engagement scenario...

R. McGuigan

2011-01-01

36

Thermal image enhancement using bi-dimensional empirical mode decomposition in combination with relevance vector machine for rotating machinery fault diagnosis  

NASA Astrophysics Data System (ADS)

In this study, a novel fault diagnosis system for rotating machinery using thermal imaging is proposed. This system consists of bi-dimensional empirical mode decomposition (BEMD) for image enhancement, a generalized discriminant analysis (GDA) for feature reduction, and a relevance vector machine (RVM) for fault classification. Firstly, the thermal image obtained from machine conditions is decomposed into intrinsic mode functions (IMFs) by using BEMD. At each decomposed level, the IMF is expanded and fused with the residue by gray-scale transformation and principal component analysis fusion technique, respectively. The enhanced image is then formed by the improved IMFs in reconstruction process. Subsequently, feature extraction is applied for the enhanced images to obtain histogram features which characterize the thermal image and contain useful information for diagnosis. The high dimensionality of the achieved feature set can be reduced by GDA implementation. Moreover, GDA also assists in the increase of the feature cluster separation. Finally, the diagnostic results are performed by RVM. The proposed system is applied and validated with the thermal images of a fault simulator. A comparative study of the classification results obtained from RVM, support vector machines, and adaptive neuro-fuzzy inference system is also performed to appraise the accuracy of these models. The results show that the proposed diagnosis system is capable of improving the classification accuracy and efficiently assisting in rotating machinery fault diagnosis.

Tran, Van Tung; Yang, Bo-Suk; Gu, Fengshou; Ball, Andrew

2013-07-01

37

HOT SODIUM TEST OF THE S2G ROTATING PLUGS. PART I. PROGRAM REPORT  

Microsoft Academic Search

Planning, execution and results of the test program are summarized. The ; test results were satisfactory in that the Rotating Plugs met all the design ; specifications, also, the required tests were completed ahead of schedule. ; Detailed results were obtained from leak test, frozen sodium seal pressure tests, ; pressure drop tests of water cooling coils, rupture test of

Terrell

1955-01-01

38

Chloride and sodium uptake potential over an entire rotation of Populus irrigated with landfill leachate.  

PubMed

There is a need for information about the response of Populus genotypes to repeated application of high-salinity water and nutrient sources throughout an entire rotation. We have combined establishment biomass and uptake data with mid- and full-rotation growth data to project potential chloride (Cl-) and sodium (Na+) uptake for 2- to 11-year-old Populus in the north central United States. Our objectives were to identify potential levels of uptake as the trees developed and stages of plantation development that are conducive to variable application rates of high-salinity irrigation. The projected cumulative uptake of Cl- and Na+ during mid-rotation plantation development was stable 2 to 3 years after planting but increased steadily from year 3 to 6. Year six cumulative uptake ranged from 22 to 175 kg Cl- ha(-1) and 8 to 74 kg Na+ ha(-1), while annual uptake ranged from 8 to 54 kg Cl- ha(-1) yr(-1) and 3 to 23 kg Na+ ha(-1) yr(-1). Full-rotation uptake was greatest from 4 to 9 years (Cl-) and 4 to 8 years (Na+), with maximum levels of Cl- (32 kg ha(-1) yr(-1)) and Na+ (13 kg ha(-1) yr(-1)) occurring in year six. The relative uptake potential of Cl- and Na+ at peak accumulation (year six) was 2.7 times greater than at the end of the rotation. PMID:19810351

Zalesny, Jill A; Zalesny, Ronald S

2009-07-01

39

Sodium  

MedlinePLUS

Sodium What is sodium? It is a mineral found naturally in food. Why do we need it? Our bodies need sodium to maintain ... salt) per day How can you control your sodium intake? • Read the Nutrition Facts Label to look ...

40

[Sodium-enhanced limestone wet FGD in rotating-stream tray scrubber].  

PubMed

Adding sodium sulfate to limestone slurry can increase SO2 removal efficiency. In this paper, sodium-enhanced limestone flue gas desulfurization(FGD) tests were conducted in rotating-stream tray scrubber. Changes of SO2 removal efficiency and pH value with time were experimentally studied and, at different pH range, the dissolution rates of limestone etc. were analyzed. The effects of plate number on SO2 removal efficiency and pressure drop were investigated at temperature approximated to industrial operating value. The average plate efficiencies were calculated. According to the experimental results, increasing plate number could increase SO2 removal efficiency, but the average plate efficiency decreased. Under the experimental conditions, when the plate number was increased from 1 to 4, the removal efficiency was increased from 25.5% to 48.6% at the liquid-to-gas ratio of 4 L/m3, but the average plate efficiency was decreased from 25.5% to 15.3%. The equation of the relation between the average plate efficiency and plate number was obtained. PMID:12533938

Sun, Wenshou; Wu, Zhongbiao; Li, Yue; Tan, Tianen

2002-09-01

41

Use of modal representation for the supporting structure in model-based fault identification of large rotating machinery: Part 2—application to a real machine  

NASA Astrophysics Data System (ADS)

Model-based techniques are often employed in diagnostics of rotating machines to locate and to evaluate the severity of a malfunction. The use of a reliable model can increase the accuracy of identification. Rigid supports or lumped mass pedestals are not always enough to account for foundation dynamics; a modal representation of the supports can improve the identification results. The method, discussed in the first part, is here validated using experimental data of a 320 MW steam turbogenerator. To the authors’ knowledge, this is the first case of fault identification on real data from a large machine, where the supporting structure is accounted for by means of a modal model.

Pennacchi, Paolo; Bachschmid, Nicolò; Vania, Andrea; Zanetta, Gian Antonio; Gregori, Luca

2006-04-01

42

MACHINERY RESONANCE AND DRILLING  

SciTech Connect

New developments in vibration analysis better explain machinery resonance, through an example of drill bit chattering during machining of rusted steel. The vibration of an operating drill motor was measured, the natural frequency of an attached spring was measured, and the two frequencies were compared to show that the system was resonant. For resonance to occur, one of the natural frequencies of a structural component must be excited by a cyclic force of the same frequency. In this case, the frequency of drill bit chattering due to motor rotation equaled the spring frequency (cycles per second), and the system was unstable. A soft rust coating on the steel to be drilled permitted chattering to start at the drill bit tip, and the bit oscillated on and off of the surface, which increased the wear rate of the drill bit. This resonant condition is typically referred to as a motor critical speed. The analysis presented here quantifies the vibration associated with this particular critical speed problem, using novel techniques to describe resonance.

Leishear, R.; Fowley, M.

2010-01-23

43

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

44

HOST RESISTANCE AND METAM SODIUM FOR MANAGING ROOT-KNOT NEMATODES IN A PEPPER - CUCUMBER ROTATION  

Technology Transfer Automated Retrieval System (TEKTRAN)

Bell peppers and cucumbers are often grown in a double crop rotation in the southern U.S. The southern root-knot nematode, Meloidogyne incognita, causes disease and yield losses in both crops. Currently, most fields are treated with methyl bromide before planting vegetable crops to control pests i...

45

Monitoring of vibrating machinery using artificial neural networks.  

National Technical Information Service (NTIS)

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 ex...

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

1991-01-01

46

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

47

Pulp, Paper Machinery - Sweden.  

National Technical Information Service (NTIS)

The market research was undertaken to study the present and potential US share of the market in Sweden for pulp and paper machinery; to examine growth trends in Swedish end-user industries over the next few years; to identify specific product categories t...

1982-01-01

48

Machinery vibration: Origins, impressions and cures  

SciTech Connect

The current trend toward high performance (speed, power, flow, etc.) and low eight are causing new machinery dynamics problems. Vibration diagnostics engineering of rotor-bearing-casing systems must consider both internal and external influences to effectively predict and diagnose these problems. It is assumed that machinery vibration data are free from ambiguity, error, conform to a standard and clearly identify the physical cause(s) responsible for vibration. Rotor vibration due to internal forces are described: unbalance force characteristics; response characteristics; and rules of rotor fundamental response. Rotor vibration due to external forces include: rotating aerodynamic stall; oil whirl; oil whip; structural resonance; vane/blade passing vibration; misalignment; rotor rubbing; gear mesh vibrations; and shaft crack. These are also discussed.

Haq, I. (Bechtel Petroleum Operations, Inc., Tupman, CA (United States))

1995-01-01

49

Rotational Fluctuation of the Sodium-driven Flagellar Motor of Vibrio alginolyticus Induced by Binding of Inhibitors  

Microsoft Academic Search

Rotation of the Na+-driven flagellar motor ofVibrio alginolyticuswas investigated under the influence of inhibitors specific to the motor, amiloride and phenamil. The rotation rate of a single flagellum on a cell stuck to a glass slide was examined using laser dark-field microscopy. In the presence of 50 mM NaCl, the average rotation rate (?) was about 600 r.p.s. with a

Kazumasa Muramoto; Yukio Magariyama; Michio Homma; Ikuro Kawagishi; Shigeru Sugiyama; Yasuo Imae; Seishi Kudo

1996-01-01

50

High-speed Rotation and Speed Stability of the Sodium-driven Flagellar Motor in Vibrio alginolyticus  

Microsoft Academic Search

The Na+-driven flagellar motor inVibrio alginolyticusrotates very fast. Rotation of a single flagellum on a stuck cell was measured by laser dark-field microscopy with submillisecond temporal resolution. The rotation rate increased with increasing external concentration of NaCl, and reached 1000 r.p.s. at 300 nM NaCl. The Na+influx through the motor should determine the rotation period (?) and affect the speed

Kazumasa Muramoto; Ikuro Kawagishi; Seishi Kudo; Yukio Magariyama; Yasuo Imae; Michio Homma

1995-01-01

51

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

52

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

53

PM—Power and Machinery  

Microsoft Academic Search

The growing importance of detrimental vibrations on mobile machinery, magnified by increasing working speed, emphasises the need to evolve from static to dynamic design of mechanical systems. Simulators are an indispensable tool to study present-day machinery dynamics in a repeatable way, under controlled laboratory conditions. The kinematic and dynamic aspects of a shaker design become more and more complex, as

I. Hostens; J. Anthonis; P. Kennes; H. Ramon

2000-01-01

54

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

55

An evaluation of liquid and two-phase cooling techniques for use in electrical machinery  

Microsoft Academic Search

The advantages that can be achieved through the use of advanced techniques for cooling of electric machinery are discussed. A brief literature survey is presented on liquid cooling of rotating machinery, where the liquid is in off-axis rotation. The lack of models to adequately predict pressure drop and heat-transfer performance in this situation has been noted. The use of heat-pipe

A. S. Wanniarachchi; P. J. Marto

1984-01-01

56

Electroslag Welding on Hydraulic Machinery.  

National Technical Information Service (NTIS)

The use of consumable guide electroslag welding process with components for hydraulic machinery having curved and profiled seams is described. Tests were carried out to optimize the welding parameters and the mechanical properties of welding joints with c...

E. Schorer F. J. Edel A. Borontschuk

1983-01-01

57

Mercury's sodium exosphere  

Microsoft Academic Search

Mercury's neutral sodium exosphere is simulated using a comprehensive 3D Monte Carlo model following sodium atoms ejected from Mercury's surface by thermal desorption, photon stimulated desorption, micro-meteoroid vaporization and solar wind sputtering. The evolution of the sodium surface density with respect to Mercury's rotation and its motion around the Sun is taken into account by considering enrichment processes due to

F. Leblanc; R. E. Johnson

2003-01-01

58

46 CFR 176.804 - Machinery.  

Code of Federal Regulations, 2011 CFR

...means of starting machinery; (c) Inspection of all machinery essential to the routine operation of the vessel including generators and cooling systems; (d) External inspection of fuel tanks and inspection of tank vents, piping, and pipe...

2011-10-01

59

Rotation sensor switch  

DOEpatents

A protective device to provide a warning if a piece of rotating machinery slows or stops comprises a pair of hinged weights disposed to rotate on a rotating shaft of the equipment. When the equipment is rotating, the weights remain in a plane essentially perpendicular to the shaft and constitute part of an electrical circuit that is open. When the shaft slows or stops, the weights are attracted to a pair of concentric electrically conducting disks disposed in a plane perpendicular to the shaft and parallel to the plane of the weights when rotating. A disk magnet attracts the weights to the electrically conducting plates and maintains the electrical contact at the plates to complete an electrical circuit that can then provide an alarm signal.

Sevec, John B. (Joliet, IL)

1978-01-01

60

Piezoelectric Pushers for Active Vibration Control of Rotating Machinery.  

National Technical Information Service (NTIS)

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...

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

1989-01-01

61

Noise reduction of rotating machinery by viscoelastic bearing supports  

Microsoft Academic Search

The demand for silent rolling bearing applications, such as electric motors\\u000aand gearboxes, has resulted in an investigation of viscoelastic bearing supports.\\u000aBy placing a thin viscoelastic layer between the bearing outer ring\\u000aand the surrounding structure, vibrations of the shaft-bearing arrangement\\u000acan be isolated and damped in such a way that the radiated sound power is\\u000areduced. The ultimate

Hetzer Gido Tillema

2003-01-01

62

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

63

GUIDELINES FOR IMPROVING RELIABILITY OF RECIPROCATING MACHINERY BY AVOIDING TORSIONAL VIBRATION PROBLEMS  

Microsoft Academic Search

There have been numerous books and technical papers written on the subject of torsional vibration. There is a general consensus that the phenomenon is well understood and easily controlled. However, numerous torsional vibration problems continue to occur in reciprocating and rotating machinery. One reason for this is the mating of equipment traditionally used in non- reciprocating applications (such as variable

Troy Feese; Charles Hill

2001-01-01

64

On the effects of production and maintenance variations on machinery performance  

Microsoft Academic Search

The variations introduced during the production and maintenance of rotating machinery components are correlated with the vibration and noise emanating from the final system during its operational lifetime. Vibration and noise are especially unacceptable elements in high-risk systems such as helicopters and aircraft engines, resulting in premature component degradation and a potentially unsafe flying environment. In such applications, individual components

Irem Y. Tumer; Edward M. Huff

2002-01-01

65

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

66

Active isolation of ship machinery platforms  

Microsoft Academic Search

The major pieces of machinery on board a ship tend to be mounted on a common platform, which is flexibly mounted on the hull, in order to isolate the machinery vibration from the ship structure and to facilitate their relative alignment. The author describes the use of active control to reduce the level of excitation of the platform structure, subject

C. F. Ross

1988-01-01

67

46 CFR 185.352 - Ventilation of gasoline machinery spaces.  

Code of Federal Regulations, 2011 CFR

... Ventilation of gasoline machinery spaces. 185.352 Section 185.352 ...Ventilation of gasoline machinery spaces. The mechanical exhaust for the ventilation of a gasoline machinery space, required by §...

2011-10-01

68

29 CFR 1910.214 - Cooperage machinery. [Reserved  

Code of Federal Regulations, 2013 CFR

...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....

2013-07-01

69

Industry Sector Analysis Mexico: Machinery Beverage Industry.  

National Technical Information Service (NTIS)

The market survey covers the beverage processing machinery market in Mexico. For the purpose of the report, the beverage industry is divided into three main sectors: soft drinks, beer, and wines and liquors. The analysis contains statistical and narrative...

1991-01-01

70

Simulation and analysis of machinery fault signals  

NASA Astrophysics Data System (ADS)

Machinery condition monitoring is rapidly finding applications in all branches of industry. In particular, vibration monitoring is playing an increasingly important role as a tool for assisting with predictive and preventive maintenance and for improving operation efficiency of plant. Condition monitoring systems are used for the detection of incipient failure and the diagnosis of the nature of faults in operating machinery. However, for these systems to be reliable an improved understanding is required of the vibration signatures produced by machinery failure mechanisms and of methods for the interpretation of these signals. Many types of fault produce vibration signals which are impulsive in nature and which may be buried in background noise. A method is described for simulating this type of signal and modelling the various stages of incipient failure. Statistical and spectral analysis are used to describe the fault development. The influence of machinery frequency response characteristics on signal transmission from the damaged are to the measurement point are also considered.

White, M. F.

1984-03-01

71

Structural and Machinery Vibrations of Hydrofoil Ships.  

National Technical Information Service (NTIS)

A study was made of the structural and machinery characteristics of several hydrofoil ships in order to determine parameters which are of main importance for vibration analyses. A preliminary hull vibration calculation of a hydrofoil ship was performed. I...

D. C. Robinson

1964-01-01

72

Diffusivity and solubility measurement of oxygen in water–acetic acid–sodium acetate solutions on a rotating ring disc electrode  

Microsoft Academic Search

The measurement of oxygen transit time from ring to disc of a rotating ring disc electrode was used to determine the diffusivity of oxygen. The solubility of oxygen under atmospheric pressure was deduced from measurement of the limiting current of oxygen reduction in a saturated solution. The density and the kinematic viscosity of the solutions were also measured. The correlations

J. Lozar; B. Bachelot; G. Falgayrac; A. Savall

1998-01-01

73

Cancer gene therapy targeting cellular apoptosis machinery.  

PubMed

The unraveling of cellular apoptosis machinery provides novel targets for cancer treatment, and gene therapy targeting this suicidal system has been corroborated to cause inflammation-free autonomous elimination of neoplastic cells. The apoptotic machinery can be targeted by introduction of a gene encoding an inducer, mediator or executioner of apoptotic cell death or by inhibition of anti-apoptotic gene expression. Strategies targeting cancer cells, which are achieved by selective gene delivery, specific gene expression or secretion of target proteins via genetic modification of autologous cells, dictate the outcome of apoptosis-based cancer gene therapy. Despite so far limited clinical success, gene therapy targeting the apoptotic machinery has great potential to benefit patients with threatening malignancies provided the availability of efficient and specific gene delivery and administration systems. PMID:22800735

Jia, Lin-Tao; Chen, Si-Yi; Yang, An-Gang

2012-07-15

74

Noise Control in Tubular Wire Stranding Machinery  

Microsoft Academic Search

This thesis is an investigation of noise control options in tubular wire stranding operations. A primary target noise level of 90 dBA, and a secondary target noise level of 85 dBA are identified, based on government regulations, current Worker's Compensation trends, and labor union activities. An examination of rope mills and the sound fields around stranding machinery demonstrates that several

James Frederick Yerges

1980-01-01

75

91. LOCKS CONTROL HOUSE & CRANE MACHINERY HOUSE ...  

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

91. LOCKS -- CONTROL HOUSE & CRANE MACHINERY HOUSE -- UPPER WEST WALL-- PLANS, ELEVATIONS, SECTIONS & VENT PLAN M-L 27 70/19. Lock and Dam No. 27 - Upper Mississippi River 9-Foot Channel Project, Lock & Dam 27, Granite City, Madison County, IL

76

The emerging shape of the ESCRT machinery  

Microsoft Academic Search

The past two years have seen an explosion in the structural understanding of the endosomal sorting complex required for transport (ESCRT) machinery that facilitates the trafficking of ubiquitylated proteins from endosomes to lysosomes via multivesicular bodies (MVBs). A common organization of all ESCRTs is a rigid core attached to flexibly connected modules that recognize other components of the MVB pathway.

Roger L. Williams; Sylvie Urbé

2007-01-01

77

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.

78

Dendritic and Postsynaptic Protein Synthetic Machinery  

Microsoft Academic Search

There is a growing body of evidence that local protein synthesis beneath synapses may provide a novel mechanism underlying plastic phenomena. In vivo and in vitro biochemical data show that dendrites can perform translation and glycosylation. Using antibodies directed against the eukaryotic protein synthetic machinery, we sought to identify the structures implicated in nonperinuclear translation, namely dendritic and postsynaptic protein

Alejandra Gardiol; Claudia Racca; Antoine Triller

1991-01-01

79

Versatility of the mitochondrial protein import machinery  

Microsoft Academic Search

The vast majority of mitochondrial proteins are synthesized in the cytosol and are imported into mitochondria by protein machineries located in the mitochondrial membranes. It has become clear that hydrophilic as well as hydrophobic preproteins use a common translocase in the outer mitochondrial membrane, but diverge to two distinct translocases in the inner membrane. The translocases are dynamic, high-molecular-weight complexes

Nikolaus Pfanner; Andreas Geissler

2001-01-01

80

Adaptive Machinery to Support Natural Conversations  

Microsoft Academic Search

Real-time adaptation and ongoing learning promise to provide computational machinery to support fluid conversational interaction. We will focus on representations and inferential strategies that can provide real-time adaptation to multiple characteristics of a conversation. The work approaches conversation from a perspective of inference and decision making under uncertainty. Automated methods for engaging users in conversations must address critical uncertainties about

Tim Paek; Eric Horvitz

81

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.

82

AGRICULTURAL MACHINERY--POWER. TEACHERS COPY.  

ERIC Educational Resources Information Center

|THE PURPOSE OF THIS DOCUMENT IS TO PROVIDE A STUDY GUIDE FOR STUDENTS PREPARING FOR AGRICULTURAL MACHINERY OCCUPATIONS IN A VOCATIONAL AGRICULTURE COOPERATIVE EDUCATION PROGRAM. THE MATERIAL WAS DESIGNED BY SUBJECT MATTER SPECIALISTS ON THE BASIS OF STATE ADVISORY COMMITTEE RECOMMENDATIONS, TRIED IN OPERATIONAL PROGRAMS, AND REFINED BY A TEACHER.…

HILL, DURWIN; VENABLE, BENNY MAC

83

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

84

AGRICULTURAL MACHINERY--POWER. TEACHERS COPY.  

ERIC Educational Resources Information Center

THE PURPOSE OF THIS DOCUMENT IS TO PROVIDE A STUDY GUIDE FOR STUDENTS PREPARING FOR AGRICULTURAL MACHINERY OCCUPATIONS IN A VOCATIONAL AGRICULTURE COOPERATIVE EDUCATION PROGRAM. THE MATERIAL WAS DESIGNED BY SUBJECT MATTER SPECIALISTS ON THE BASIS OF STATE ADVISORY COMMITTEE RECOMMENDATIONS, TRIED IN OPERATIONAL PROGRAMS, AND REFINED BY A TEACHER.…

HILL, DURWIN; VENABLE, BENNY MAC

85

Sodium - urine  

MedlinePLUS

The sodium urine test measures the amount of salt (sodium) in a urine sample. Sodium can also ... L/day), depending on how much fluid and salt you consume. The examples above are common measurements ...

86

46 CFR 169.315 - Ventilation (other than machinery spaces).  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Ventilation (other than machinery spaces). 169.315 Section 169.315 Shipping...169.315 Ventilation (other than machinery spaces). (a) All enclosed spaces within the vessel must be properly...

2011-10-01

87

46 CFR 169.315 - Ventilation (other than machinery spaces).  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Ventilation (other than machinery spaces). 169.315 Section 169.315 Shipping...169.315 Ventilation (other than machinery spaces). (a) All enclosed spaces within the vessel must be properly...

2012-10-01

88

60. VIEW TO SOUTHEAST TOWARDS WINDING MACHINERY: View towards the ...  

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

60. VIEW TO SOUTHEAST TOWARDS WINDING MACHINERY: View towards the southeast looking down the tension runs towards the winding machinery. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

89

Korean Market Survey: Plastic Products Production, Machinery and Raw Materials.  

National Technical Information Service (NTIS)

The report contains a market assessment for plastic processing machinery and raw materials in South Korea. The competitive environment, future demand, and market access data for plastics products and machinery are discussed.

1980-01-01

90

44. Looking south towards Sullivan Machinery Company complex from the ...  

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

44. Looking south towards Sullivan Machinery Company complex from the north side of the Sugar River. The footbridge was built in 1920. - Sullivan Machinery Company, Main Street between Pearl & Water Streets, Claremont, Sullivan County, NH

91

29 CFR 1910.213 - Woodworking machinery requirements.  

Code of Federal Regulations, 2013 CFR

...OCCUPATIONAL SAFETY AND HEALTH STANDARDS Machinery and Machine Guarding § 1910.213 Woodworking machinery requirements. (a) Machine construction general. (1) Each machine shall be so constructed as to be free from sensible...

2013-07-01

92

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

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

4. MACHINERY SHED AND STORAGE ROOM ADDITION, SOUTH AND WEST ...  

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

4. MACHINERY SHED AND STORAGE ROOM ADDITION, SOUTH AND WEST WALL LOOKING NORTHEAST SEED STORAGE BUILDING (1963) BEHIND - Tucson Plant Material Center, Machinery Shed, 3241 North Romero Road, Tucson, Pima County, AZ

95

Sodium Phenylacetate and Sodium Benzoate  

Center for Drug Evaluation (CDER)

... Sodium Phenylacetate and Sodium Benzoate, Gastroenterology, UCD (NAGS; CPS; ASS; OTC; ASL; ARG), Indications and Usage Description ... More results from www.fda.gov/drugs/scienceresearch/researchareas

96

46 CFR 58.01-50 - Machinery space, noise.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Machinery space, noise. 58.01-50 Section 58.01-50...General Requirements § 58.01-50 Machinery space, noise. (a) Each machinery space must be designed to minimize the...

2011-10-01

97

46 CFR 58.01-50 - Machinery space, noise.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Machinery space, noise. 58.01-50 Section 58.01-50...General Requirements § 58.01-50 Machinery space, noise. (a) Each machinery space must be designed to minimize the...

2012-10-01

98

46 CFR 42.15-35 - Machinery space openings.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Machinery space openings. 42.15-35 Section 42.15-35...Assignment of Freeboard § 42.15-35 Machinery space openings. (a) Machinery space openings in position 1 or 2 shall be...

2011-10-01

99

46 CFR 174.195 - Bulkheads in machinery spaces.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195 Shipping...Vessels § 174.195 Bulkheads in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the...

2011-10-01

100

46 CFR 174.195 - Bulkheads in machinery spaces.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Bulkheads in machinery spaces. 174.195 Section 174.195 Shipping...Vessels § 174.195 Bulkheads in machinery spaces. (a) The bulkhead in each machinery space of each OSV must be watertight to the...

2012-10-01

101

46 CFR 45.149 - Machinery space openings.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Machinery space openings. 45.149 Section 45.149 Shipping...Conditions of Assignment § 45.149 Machinery space openings. (a) Machinery space openings in position 1 or 2 must be...

2011-10-01

102

Research of Embedded Motion Controller for Construction Machinery  

Microsoft Academic Search

Motion controller is one of the core components in construction machinery equipment. Compared with general-purpose motion controller based on PC or PLC, embedded motion controller (EMC) for construction machinery is characterized by the strong pertinency and specialty for this field. This paper describes the key technologies on developing the hardware and software of EMC for construction machinery, including architecture of

Min Jin; Xiang Zhou; Jihui Zhou

2008-01-01

103

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

104

Monitoring of vibrating machinery using artificial neural networks  

SciTech Connect

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 render information about faults in meshing gear teeth; while the high frequency domain will contain information about incipient faults in rolling-element bearings. Trend analysis may be performed by comparing the vibration spectrum for each machine with a reference spectrum and evaluating the vibration magnitude changes at different frequencies. This form of analysis for diagnostics is often performed by maintenance personnel monitoring and recording transducer signals and analyzing the signals to identify the operating condition of the machine. With the advent of portable fast Fourier transform (FFT) analyzers and ``laptop`` computers, it is possible to collect and analyze vibration data an site and detect incipient failures several weeks or months before repair is necessary. It is often possible to estimate the remaining life of certain systems once a fault has been detected. RMS velocity, acceleration, displacements, peak value, and crest factor readings can be collected from vibration sensors. To exploit all the information embedded in these signals, a robust and advanced analysis technique is required. Our goal is to design a diagnostic system using neural network technology, a system such as this would automate the interpretation of vibration data coming from plant-wide machinery and permit efficient on-line monitoring of these components.

Alguindigue, I.E.; Loskiewicz-Buczak, A. [Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering; Uhrig, R.E. [Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering]|[Oak Ridge National Lab., TN (United States)

1991-12-31

105

Low-resolution structure of vaccinia virus DNA replication machinery.  

PubMed

Smallpox caused by the poxvirus variola virus is a highly lethal disease that marked human history and was eradicated in 1979 thanks to a worldwide mass vaccination campaign. This virus remains a significant threat for public health due to its potential use as a bioterrorism agent and requires further development of antiviral drugs. The viral genome replication machinery appears to be an ideal target, although very little is known about its structure. Vaccinia virus is the prototypic virus of the Orthopoxvirus genus and shares more than 97% amino acid sequence identity with variola virus. Here we studied four essential viral proteins of the replication machinery: the DNA polymerase E9, the processivity factor A20, the uracil-DNA glycosylase D4, and the helicase-primase D5. We present the recombinant expression and biochemical and biophysical characterizations of these proteins and the complexes they form. We show that the A20D4 polymerase cofactor binds to E9 with high affinity, leading to the formation of the A20D4E9 holoenzyme. Small-angle X-ray scattering yielded envelopes for E9, A20D4, and A20D4E9. They showed the elongated shape of the A20D4 cofactor, leading to a 150-Å separation between the polymerase active site of E9 and the DNA-binding site of D4. Electron microscopy showed a 6-fold rotational symmetry of the helicase-primase D5, as observed for other SF3 helicases. These results favor a rolling-circle mechanism of vaccinia virus genome replication similar to the one suggested for tailed bacteriophages. PMID:23175373

Sèle, Céleste; Gabel, Frank; Gutsche, Irina; Ivanov, Ivan; Burmeister, Wim P; Iseni, Frédéric; Tarbouriech, Nicolas

2012-11-21

106

Low-Resolution Structure of Vaccinia Virus DNA Replication Machinery  

PubMed Central

Smallpox caused by the poxvirus variola virus is a highly lethal disease that marked human history and was eradicated in 1979 thanks to a worldwide mass vaccination campaign. This virus remains a significant threat for public health due to its potential use as a bioterrorism agent and requires further development of antiviral drugs. The viral genome replication machinery appears to be an ideal target, although very little is known about its structure. Vaccinia virus is the prototypic virus of the Orthopoxvirus genus and shares more than 97% amino acid sequence identity with variola virus. Here we studied four essential viral proteins of the replication machinery: the DNA polymerase E9, the processivity factor A20, the uracil-DNA glycosylase D4, and the helicase-primase D5. We present the recombinant expression and biochemical and biophysical characterizations of these proteins and the complexes they form. We show that the A20D4 polymerase cofactor binds to E9 with high affinity, leading to the formation of the A20D4E9 holoenzyme. Small-angle X-ray scattering yielded envelopes for E9, A20D4, and A20D4E9. They showed the elongated shape of the A20D4 cofactor, leading to a 150-Å separation between the polymerase active site of E9 and the DNA-binding site of D4. Electron microscopy showed a 6-fold rotational symmetry of the helicase-primase D5, as observed for other SF3 helicases. These results favor a rolling-circle mechanism of vaccinia virus genome replication similar to the one suggested for tailed bacteriophages.

Sele, Celeste; Gabel, Frank; Gutsche, Irina; Ivanov, Ivan; Burmeister, Wim P.

2013-01-01

107

Protein import machineries in endosymbiotic organelles  

Microsoft Academic Search

.  Chloroplast and mitochondria, the two organelles with an accepted endosymbiotic \\u000a origin, have developed multiple translocation pathways to ensure the subcellular allocation of \\u000a proteins synthesized by cytosolic ribosomes, and to guarantee their assembly into functional \\u000a complexes in coordination also with organellar-encoded subunits. The evolution of different protein \\u000a import machineries was thus essential for the development of these two organelles within cells.

M. Balsera; J. Soll; B. Bölter

2009-01-01

108

Intelligent diagnosis methods for plant machinery  

Microsoft Academic Search

This paper reports several intelligent diagnostic approaches based on artificial neural network and fuzzy algorithm for plant\\u000a machinery, such as the diagnosis method using the wavelet transform, rough sets, and fuzzy neural network; the diagnosis method\\u000a based on the sequential inference and fuzzy neural network; the diagnosis approach by the possibility theory and certainty\\u000a factor model; and the diagnosis method

Huaqing Wang; Peng Chen; Shuming Wang

2010-01-01

109

RNA Polymerase Transcription Machinery in Trypanosomes  

Microsoft Academic Search

Transcription is a fundamental biological process employed by all living organisms to decode their genetic information. The information stored in genomic DNA is copied into RNA mol- ecules by polymerization of ribonucleotide building blocks, which ultimately gives rise to different classes of transcripts. mRNAs encode polypeptides, rRNAs drive the macromolec- ular protein-synthesis machinery, and tRNAs act as adaptor molecules to

Anish Das; Mahrukh Banday; Vivian Bellofatto

2008-01-01

110

Numerical noise prediction in fluid machinery  

Microsoft Academic Search

Numerical methods successively became important in the design and optimization of fluid machinery. However, as noise emission\\u000a is considered, one can hardly find standardized prediction methods combining flow and acoustical optimization. Several numerical\\u000a field methods for sound calculations have been developed. Due to the complexity of the considered flow, approaches must be\\u000a chosen to avoid exhaustive computing. In this contribution

Iris Pantle; Franco Magagnato; Martin Gabi

2005-01-01

111

Dietary Sodium  

MedlinePLUS

Table salt is made up of the elements sodium and chlorine - the technical name for salt is sodium chloride. Your body needs some sodium to work properly. ... to healthy eating is choosing foods low in salt and sodium. Doctors recommend you eat less than ...

112

Objective Machinery Fault Diagnosis Using Fuzzy Logic  

NASA Astrophysics Data System (ADS)

Vibration-based machine condition monitoring incorporates a number of machinery fault detection and diagnostic techniques. Many machinery fault diagnostic techniques use automatic signal classification in order to increase accuracy and reduce errors caused by subjective human judgment. In this paper, fuzzy logic techniques have been applied to classify frequency spectra representing various rolling element bearing faults. The frequency spectra representing a number of different fault conditions have been processed using a variety of fuzzy set shapes. The application of basic fuzzy logic techniques has allowed fuzzy numbers to be generated which represent the similarity between frequency spectra. Correct classification of different bearing fault spectra was observed when the correct combination of fuzzy set shapes and range of membership domains were used. The problem of membership overlapping found in previous studies, where classifying individual spectrum with respect to spectra that represent true fault classes was not conclusive, has been overcome. Further work is described which will extend this technique to other classes of machinery using generic software.

Mechefske, C. K.

1998-11-01

113

Rotational Seismometer.  

National Technical Information Service (NTIS)

Elastic wave theory predicts that the elastic waves generated by an earthquake and other seismic events include a measurable component of horizontal elastic rotation. Several rotational seismometers have been designed to measure this rotational component....

P. W. Rodgers C. A. Dann

1970-01-01

114

Low Back Pain in Port Machinery Operators  

NASA Astrophysics Data System (ADS)

The occurrence of several types of low back pain (LBP) was investigated by a standardized questionnaire in a group of 219 port machinery operators exposed to whole-body vibration (WBV) and postural load and in a control group of 85 maintenance workers employed at the same transport company. The group of port machinery operators included 85 straddle carrier drivers, 88 fork-lift truck drivers, and 46 crane operators. The vector sum of the frequency-weighted r.m.s. acceleration of vibration measured on the seatpan of port vehicles and machines averaged 0.90 m/s2 for fork-lift trucks, 0.48 m/s2 for straddle carriers, 0.53 m/s2 for mobile cranes, and 0.22 m/s2 for overhead cranes. The 12-month prevalence of low back symptoms (LBP, sciatic pain, treated LBP, sick leave due to LBP) was significantly greater in the fork-lift truck drivers than in the controls and the other two groups of port machinery operators. After adjusting for potential confounders, the prevalence of low back symptoms was found to increase with the increase of WBV exposure expressed as duration of exposure (driving years), equivalent vibration magnitude (m/s2), or cumulative vibration exposure (yr m2/s4). An excess risk for lumbar disc herniation was observed in the port machinery operators with prolonged driving experience. In both the controls and the port machinery operators, low back complaints were strongly associated with perceived postural load assessed in terms of frequency and/or duration of awkward postures at work. Multivariate analysis showed that vibration exposure and postural load were independent predictors of LBP. Even though the cross-sectional design of the present study does not permit firm conclusions on the relationship between WBV exposure and low back disorders, the findings of this investigation provide additional epidemiological evidence that seated WBV exposure combined with non-neutral trunk postures, as while driving, is associated with an increased risk of long-term adverse health effects on the lower back. . All rights reserved.

Bovenzi, M.; Pinto, I.; Stacchini, N.

2002-05-01

115

46 CFR 62.50-30 - Additional requirements for periodically unattended machinery plants.  

Code of Federal Regulations, 2011 CFR

...requirements for periodically unattended machinery plants. 62.50-30 Section 62.50-30...requirements for periodically unattended machinery plants. Note: Periodically unattended machinery plants include machinery plants and...

2011-10-01

116

46 CFR 62.50-30 - Additional requirements for periodically unattended machinery plants.  

Code of Federal Regulations, 2012 CFR

...requirements for periodically unattended machinery plants. 62.50-30 Section 62.50-30...requirements for periodically unattended machinery plants. Note: Periodically unattended machinery plants include machinery plants and...

2012-10-01

117

Sodium - blood  

MedlinePLUS

... of diuretics, or burns Too much salt or sodium bicarbonate in your diet Use of certain medicines, including birth control pills, corticosteroids, laxatives, lithium, and NSAIDs ... normal sodium level is called hyponatremia. This may be due ...

118

Sodium Phosphate  

MedlinePLUS

Sodium phosphate is used to empty the colon (large intestine, bowel) before a colonoscopy (examination of the ... clear view of the walls of the colon. Sodium phosphate is in a class of medications called ...

119

Sodium Azide  

MedlinePLUS

... exposed to sodium azide, you should remove your clothing, rapidly wash your entire body with soap and ... medical care as quickly as possible. Removing your clothing: Quickly take off clothing that may have sodium ...

120

Metalworking Machinery and Equipment (Brazil). Foundry and Rolling Mill Machinery, August 1991.  

National Technical Information Service (NTIS)

Brazil is the seventh largest steel producer of the world. Many of the Brazilian steelmakers lack state-of-the-art technology. The import market for foundry and rolling mill machinery in Brazil is very competitive. American companies' market share has dec...

1991-01-01

121

O the Selection of Informative Wavelets for Machinery Diagnosis  

NASA Astrophysics Data System (ADS)

A new method of machinery fault diagnosis based on wavelet analysis and using an extension to Mallat and Zhang's matching pursuit for machinery diagnosis is presented. Instead of the `best matching' criterion, a mutual information measure is used to search a redundant wavelet dictionary for a small set of wavelets that carry meaningful information about machinery faults. With these informative wavelets treated as feature extractors, this approach effectively facilitates the diagnosis of machinery faults of a non-stationary nature. This method has been applied to the detection of diesel engine malfunctions. The results show that both the sensitivity and the reliability of this approach are good.

Liu, B.; Ling, S.-F.

1999-01-01

122

Rotating Vesta  

NASA Video Gallery

Astronomers combined 146 exposures taken by NASA's Hubble Space Telescope to make this 73-frame movie of the asteroid Vesta's rotation. Vesta completes a rotation every 5.34 hours. › Asteroid and Comet Watch site › Dawn mission site

Anthony Greicius

2010-10-07

123

Rotational Symmetry  

NSDL National Science Digital Library

With this interactive Java Sketchpad applet students use spatial reasoning and visualization to explore rotation of a quadrilateral. The vertices and the center of rotation can be moved. Also included are tasks that focus the learner's manipulations.

2011-01-01

124

Vibration isolation of unbalanced machinery using an adaptive-passive magnetoelastic suspension  

NASA Astrophysics Data System (ADS)

The problem of unbalanced machinery isolation is tackled in this paper. The proposed method incorporates a magnetoelastic suspension which can be adapted depending on the rotational frequency and is built with two main parts: a magnetoelastic rod and a magnetizing solenoid. The properties of the system make it possible to use one configuration of the suspension (demagnetized state of the rod) over a bandwidth range and another configuration (saturated state of the rod) over the remaining bandwidth range. In addition, three different magnetoelastic materials were tested and the results show significant improvements with respect to completely passive configurations. A theoretical model is also explored in order to make comparisons with the experimental results.

Morales, A. L.; Nieto, A. J.; Chicharro, J. M.; Pintado, P.

2012-01-01

125

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

126

Autophagy: molecular machinery for self-eating.  

PubMed

Autophagy is a highly conserved process in eukaryotes in which the cytoplasm, including excess or aberrant organelles, is sequestered into double-membrane vesicles and delivered to the degradative organelle, the lysosome/vacuole, for breakdown and eventual recycling of the resulting macromolecules. This process has an important role in various biological events such as adaptation to changing environmental conditions, cellular remodeling during development and differentiation, and determination of lifespan. Auto-phagy is also involved in preventing certain types of disease, although it may contribute to some pathologies. Recent studies have identified many components that are required to drive this complicated cellular process. Auto-phagy-related genes were first identified in yeast, but homologs are found in all eukaryotes. Analyses in a range of model systems have provided huge advances toward understanding the molecular basis of autophagy. Here we review our current knowledge on the machinery and molecular mechanism of autophagy. PMID:16247502

Yorimitsu, T; Klionsky, D J

2005-11-01

127

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.

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

2012-01-01

128

Consider synthetic lubricants for process machinery  

SciTech Connect

Judicious application of properly formulated synthetic lubricants can benefit a wide spectrum of process machinery. This informed usage is very likely to drive down overall maintenance and downtime expenditures and can markedly improve plant efficiency. The paper describes the origin of synthetic lubricants, then explains the principal features and attributes of the six base fluids: synthetic hydrocarbon fluids; organic esters; polyglycols; phosphate esters; silicones; and blends of the synthetic lubricants. The paper discusses the properties and advantages and gives brief highlights of successful case histories of the use of synthetic lubricants. These include: circulating oil system for furnace air preheaters; Right angle gear drives for fin fan coolers; plant-wide oil mist systems; and pulverizing mills in coal-fired generating plant. In the last case, an economic analysis is done to point out the savings possible in lubricant consumption cost, reduced maintenance cost, lubricant disposal cost, and reduction in power consumption.

Bloch, H.P. (Bloch, (Heinz P.), Montgomery, TX (United States)); Pate, A.R. Jr. (Summit Industrial Products, Tyler, TX (United States))

1995-01-01

129

Multiple Cylinder Free-Piston Stirling Machinery  

NASA Astrophysics Data System (ADS)

In order to improve the specific power of piston-cylinder type machinery, there is a point in capacity or power where an advantage accrues with increasing number of piston-cylinder assemblies. In the case of Stirling machinery where primary energy is transferred across the casing wall of the machine, this consideration is even more important. This is due primarily to the difference in scaling of basic power and the required heat transfer. Heat transfer is found to be progressively limited as the size of the machine increases. Multiple cylinder machines tend to preserve the surface area to volume ratio at more favorable levels. In addition, the spring effect of the working gas in the so-called alpha configuration is often sufficient to provide a high frequency resonance point that improves the specific power. There are a number of possible multiple cylinder configurations. The simplest is an opposed pair of piston-displacer machines (beta configuration). A three-cylinder machine requires stepped pistons to obtain proper volume phase relationships. Four to six cylinder configurations are also possible. A small demonstrator inline four cylinder alpha machine has been built to demonstrate both cooling operation and power generation. Data from this machine verifies theoretical expectations and is used to extrapolate the performance of future machines. Vibration levels are discussed and it is argued that some multiple cylinder machines have no linear component to the casing vibration but may have a nutating couple. Example applications are discussed ranging from general purpose coolers, computer cooling, exhaust heat power extraction and some high power engines.

Berchowitz, David M.; Kwon, Yong-Rak

130

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

Microsoft Academic Search

Summary We describe a chemotactic-like response of Escheri- chia coli strains lacking most of the known chemo- taxis machinery but containing high levels of the response regulator CheY. The bacteria accumulated in aspartate-containing capillaries, they formed rings on tryptone-containing semisolid agar, and the prob- ability of counterclockwise flagellar rotation tran- siently increased in response to stimulation with aspartate (10?10-10?5 M;

Rina Barak; Michael Eisenbach

1999-01-01

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

4. FIRST FLOOR INTERIOR, AMMONIA COMPRESSION DYNAMOS IN MACHINERY ROOM ...  

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

4. FIRST FLOOR INTERIOR, AMMONIA COMPRESSION DYNAMOS IN MACHINERY ROOM ALONG SOUTH SIDE OF WESTERN PORTION OF BUILDING, FROM EASTERN ENTRANCE TO MACHINERY ROOM, LOOKING WEST. - Oakland Naval Supply Center, Cold Storage Warehouse, South of C Street between First & Second Street, Oakland, Alameda County, CA

133

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

Code of Federal Regulations, 2011 CFR

...MARINE ENGINEERING MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS General Requirements § 58.01-40 Machinery, angles...and including 15°, and when the vessel is inclined under dynamic conditions (rolling) at any angle of list up to and...

2011-10-01

134

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

Code of Federal Regulations, 2012 CFR

...MARINE ENGINEERING MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS General Requirements § 58.01-40 Machinery, angles...and including 15°, and when the vessel is inclined under dynamic conditions (rolling) at any angle of list up to and...

2012-10-01

135

Multilayers process modeling for complex machinery products collaborative design  

Microsoft Academic Search

Collaborative model and process model for complex machinery products collaborative design are studied in this paper. The authors propose a layer collaborative model, which is used to describe the layer collaborative process in complex machinery design firstly. It contains design layer dimension, design objective dimension, design cycle\\/period dimension and design constraint dimension. The model is described by state-space method and

Yin-zhang Guo; Jian-chao Zeng

2010-01-01

136

16. Sullivan Machinery Co. complex from the west. The Foundry ...  

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

16. Sullivan Machinery Co. complex from the west. The Foundry (1908) is on the left, and the Erecting Shop (1919) in the right foreground, with the Machine Shop (1905) beyond it. A Baltimore truss steel bridge, built in 1905, is visible in the center of the photograph. - Sullivan Machinery Company, Main Street between Pearl & Water Streets, Claremont, Sullivan County, NH

137

Liquid sodium model of Earth's outer core  

Microsoft Academic Search

Convective motions in Earth's outer core are responsible for the generation of the geomagnetic field. We present liquid sodium convection experiments in a spherical vessel, designed to model the convective state of Earth's outer core. Heat transfer, zonal fluid velocities, and properties of temperature fluctuations were measured for different rotation rates O and temperature drops DeltaT across the convecting sodium.

Woodrow Shew

2004-01-01

138

Big dragon, little dragons : China's challenge to the machinery exports of southeast Asia  

Microsoft Academic Search

This paper investigates the extent of China's export boom in machinery and analyzes trade in components and finished machinery between China and Southeast Asia. China has increased its world market share in machinery exports. The median relative unit value of its finished machinery exports has also risen. Yet the author finds no evidence that China's expansion in the world machinery

Sjamsu Rahardja

2007-01-01

139

A Liquid Sodium ? ? Dynamo Experiment  

NASA Astrophysics Data System (ADS)

A Liquid Sodium ? ? Dynamo Experiment; Stirling Colgate, Howard Beckley, Hui Li, Richard Sonnenfeld, Dave Westpfahl, Ian Bentley, Rocky Ginanni, Travis Mckinnly, and Valadimir Pariev, LANL, NMIMT, & Univ. of Rochester. A liquid sodium ? ? dynamo experiment has been constructed at NMIMT to simulate MRI, dynamo gain, and feed back in liquid sodium (r1 = 15 cm,; r2 = 30 cm,; L=30 cm,; f1 = 120 Hz,; f2 = 30 Hz ). It is designed to simulate the generation of large scale magnetic fields in massive black hole accretion disks, galaxies, and stars. The omega gain is due to the shear flow of differential rotation of Couette flow between two differentially rotating co-axial cylinders. Differential rotation in a conducting fluid twists a radial or quadrupole magnetic flux into a greatly enhanced toroidal flux. A large coherent helicity is produced by driven plumes and astrophisically by star-disk collisions, supernova explosions, or large scale plume convection respectively. We have rotated the apparatus with water and hot oil and demonstrated stable Couette flow with only Ekman-flow-induced torque. We will report on the ? gain with liquid sodium. This Work has been supported by NMIMT, EMRTC, NSF, & LDRD of LANL.

Colgate, Stirling; Beckley, Howard; Li, Hui; Sonnenfield, Richard; Westpfahl, Dave; Bentley, Ian; Ginanni, Rocky; McKinnly, Travis; Pariev, Valadimir

2004-11-01

140

EBR-II rotating plug seal maintenance  

Microsoft Academic Search

The EBR-II rotating plug seals require frequent cleaning and maintenance to keep the plugs from sticking during fuel handling. Time consuming cleaning on the cover gas and air sides of the dip ring seal is required to remove oxidation and sodium reaction products that accumulate and stop plug rotation. Despite severely limited access, effective seal cleaning techniques have removed 11

1986-01-01

141

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

Code of Federal Regulations, 2011 CFR

... false Separation of machinery and fuel tank spaces from accommodation spaces. 169.631 Section 169.631 Shipping ...169.631 Separation of machinery and fuel tank spaces from accommodation spaces. (a) Machinery...

2011-10-01

142

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

Code of Federal Regulations, 2012 CFR

... false Separation of machinery and fuel tank spaces from accommodation spaces. 169.631 Section 169.631 Shipping ...169.631 Separation of machinery and fuel tank spaces from accommodation spaces. (a) Machinery...

2012-10-01

143

46 CFR 177.620 - Ventilation of machinery and fuel tank spaces.  

Code of Federal Regulations, 2011 CFR

...Ventilation of machinery and fuel tank spaces. 177.620 Section 177.620 Shipping...Ventilation of machinery and fuel tank spaces. In addition to the requirements of this subpart, ventilation systems for spaces containing machinery or fuel tanks...

2011-10-01

144

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

145

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

Code of Federal Regulations, 2011 CFR

...Service Industry Machines Special Industry Machinery Speed Changers, High Speed Drivers & Gears Steam, Gas, Hydraulic Turbines, Generator Units Switchgear & Switchboard Apparatus Textile Machinery Transformers Welding Apparatus...

2011-07-01

146

Sodium Oxybate  

MedlinePLUS

... and excessive daytime sleepiness in patients who have narcolepsy (a sleep disorder that may cause extreme sleepiness, sudden uncontrollable urge ... The way that sodium oxybate works to treat narcolepsy is not known.

147

28. View of operating machinery shoeing electric motor, clutch drive ...  

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

28. View of operating machinery shoeing electric motor, clutch drive wheel and hand-painted alignment dial, (Nov. 25, 1988) - University Heights Bridge, Spanning Harlem River at 207th Street & West Harlem Road, New York, New York County, NY

148

14. MACHINERY DETAILS: CENTER WHEEL FRAME AND AXEL, JACK WHEEL ...  

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

14. MACHINERY DETAILS: CENTER WHEEL FRAME AND AXEL, JACK WHEEL FRAME, JACK NUT HOUSING, JACK NUT, ETC. - Niantic River Swing Bridge, Spanning Niantic River between East Lyme & Waterford, Old Lyme, New London County, CT

149

Condition Monitoring Technology for Civil Works Lock Operating Machinery.  

National Technical Information Service (NTIS)

This pilot project successfully demonstrated condition monitoring and predictive maintenance at Port Allen Lock by installation of programmable logic controllers (PLCs) and field sensors for lock operating machinery and structural components at one of the...

A. Schimpf L. D. Stephenson A. Kumar

2003-01-01

150

6. REMAINS OF WATER POWERED MACHINERY USED TO POWER GRIST ...  

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

6. REMAINS OF WATER POWERED MACHINERY USED TO POWER GRIST MILL. NOTE BELT HANGING FROM WOODEN WHEEL IN UPPER RIGHT HAND CORNER OF PHOTOGRAPH. - Plante Grist Mill, U.S. Route 44, Chepachet, Providence County, RI

151

46 CFR 58.20-15 - Installation of refrigerating machinery.  

Code of Federal Regulations, 2011 CFR

...Installation of refrigerating machinery. (a) Where refrigerating machines are installed in which anhydrous ammonia is used as a refrigerant, such machines shall be located in a well-ventilated, isolated compartment, preferably on the deck, but in...

2011-10-01

152

46 CFR 58.20-15 - Installation of refrigerating machinery.  

Code of Federal Regulations, 2012 CFR

...Installation of refrigerating machinery. (a) Where refrigerating machines are installed in which anhydrous ammonia is used as a refrigerant, such machines shall be located in a well-ventilated, isolated compartment, preferably on the deck, but in...

2012-10-01

153

5. INTERIOR, FIRST FLOOR, WEST VIEW OF MACHINERY FRAME, SHOWING ...  

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

5. INTERIOR, FIRST FLOOR, WEST VIEW OF MACHINERY FRAME, SHOWING MAIN VERTICAL SHAFT WITH CAST-IRON WALLOWER GEAR AT LOWER END, AND THE GREAT SPUR WHEEL OF ALL WOODEN CONSTRUCTION - Robeson-Williams Grist Mill, Roslyn, Nassau County, NY

154

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

155

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

156

29 CFR 1910.215 - Abrasive wheel machinery.  

Code of Federal Regulations, 2013 CFR

...SAFETY AND HEALTH STANDARDS Machinery and Machine Guarding § 1910.215 Abrasive wheel... (a) General requirements â(1) Machine guarding. Abrasive wheels shall be used only on machines provided with safety guards as...

2013-07-01

157

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

158

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

159

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

160

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

161

46. Interior detail of barge crane engine house with machinery. ...  

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

46. Interior detail of barge crane engine house with machinery. Lambert Hoisting Engine Company Winder Powered by A Gray Marine Diesel. - Barbour Boat Works, Tryon Palace Drive, New Bern, Craven County, NC

162

23. VIEW OF LE CLAIRE LOCK (19211925), SHOWING OPERATING MACHINERY, ...  

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

23. VIEW OF LE CLAIRE LOCK (1921-1925), SHOWING OPERATING MACHINERY, DOWSTREAM GATES, UPSTREAM SIDE - Mississippi River 9-Foot Channel, Lock & Dam No. 14, Upper Mississippi River, Le Claire, Scott County, IA

163

95. PHOTOCOPY OF DRAWING, SPAN 1, DETAILS OF TURNTABLE MACHINERY, ...  

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

95. PHOTOCOPY OF DRAWING, SPAN 1, DETAILS OF TURNTABLE MACHINERY, 3/4' and 1 1/2' = 1' (CENTER CONE, RADIAL STRUT RING, TRACK, ROLLERS, PINION GEARS) - Keokuk & Hamilton Bridge, Spanning Mississippi River, Keokuk, Lee County, IA

164

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

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

97. DAM - TAINTER GATE OPERATING MACHINERY - TRAVELING HOIST - AMERICAN TYPE ASSEMBLY (ML-4-55/111-FS), February 1938 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffalo County, WI

165

100. DAM TAINTER GATE OPERATING MACHINERY AMERICAN HOIST ...  

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

100. DAM - TAINTER GATE OPERATING MACHINERY - AMERICAN HOIST CAR ELECTRIFICATION ASSEMBLY (ML-4-55/146), January 1958 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffalo County, WI

166

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

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

98. DAM - TAINTER GATE OPERATING MACHINERY - TRAVELING HOIST - AMERICAN TYPE ASSEMBLY (ML-4&5-55/112-FS), March 1934 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffalo County, WI

167

5. INTERIOR VIEW, SHOWING TEST MACHINERY IN FOREGROUND AND CONTROL ...  

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

5. INTERIOR VIEW, SHOWING TEST MACHINERY IN FOREGROUND AND CONTROL ROOM IN BACKGROUND. - Wright-Patterson Air Force Base, Area B, Building 20, Propeller Laboratory, Northwest corner of Seventh & E Streets, Dayton, Montgomery County, OH

168

94. DAM TAINTER GATE OPERATING MACHINERY METHOD OF ...  

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

94. DAM - TAINTER GATE OPERATING MACHINERY - METHOD OF ATTACHING LIFTING CHAINS TO DRUMS OF HOIST - LAKESIDE TYPE (ML-4&5-55/34-FS), February 1938 - Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffalo County, WI

169

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

170

39. TAINTER GATE VALVES, OPERATING MACHINERY, AND VALVE ASSEMBLED AUXILIARY ...  

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

39. TAINTER GATE VALVES, OPERATING MACHINERY, AND VALVE ASSEMBLED AUXILIARY LOCK. January 1932 - Mississippi River 9-Foot Channel Project, Lock & Dam No. 15, Upper Mississipi River (Arsenal Island), Rock Island, Rock Island County, IL

171

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

172

Exploring functional relationships between components of the gene expression machinery  

Microsoft Academic Search

Eukaryotic gene expression requires the coordinated activity of many macromolecular machines including transcription factors and RNA polymerase, the spliceosome, mRNA export factors, the nuclear pore, the ribosome and decay machineries. Yeast carrying mutations in genes encoding components of these machineries were examined using microarrays to measure changes in both pre-mRNA and mRNA levels. We used these measurements as a quantitative

Todd Burckin; Roland Nagel; Yael Mandel-Gutfreund; Lily Shiue; Tyson A Clark; Jean-Leon Chong; Tien-Hsien Chang; Sharon Squazzo; Grant Hartzog; Manuel Ares Jr

2005-01-01

173

Rotating head  

SciTech Connect

A rotating head adapted for use in drilling a well borehole at a well drilling site wherein drilling fluid is passed into the well borehole and wherein some of the drilling fluid is passed from the well borehole and wherein a rotatable kelly, having a non-circular cross section, extends into the well borehole during the drilling operations is described, comprising: an outer barrel; means for providing a fluid seal between the inner and outer barrels; means for rotatingly supporting the inner barrel on the outer barrel; and a rotary drive member connected to the lower end portion of the inner barrel and having a drive bore extending through a portion thereof.

Bearden, R.M.; Haynes, W.A.

1988-05-24

174

Rotational aerophones  

NASA Astrophysics Data System (ADS)

Free rotational aerophones such as the bullroarer, which consists of a wooden slat whirled around on the end of a string, and which emits a loud pulsating roar, have been used in many ancient and traditional societies for ceremonial purposes. This article presents an experimental and theoretical investigation of this instrument. The aerodynamics of rotational behavior is elucidated, and relates slat rotation frequency to slat width and velocity through the air. Analysis shows that sound production is due to generation of an oscillating-rotating dipole across the slat, the role of the vortices shed by the slat being relatively minor. Apparent discrepancies between the behavior of a bullroarer slat and a slat mounted on an axle in a wind tunnel are shown to be due to viscous friction in the bearings of the wind-tunnel experiment.

Fletcher, N. H.; Tarnopolsky, A. Z.; Lai, J. C. S.

2002-03-01

175

Rotational Energy.  

ERIC Educational Resources Information Center

Demonstrates several objects rolling down a slope to explain the energy transition among potential energy, translational kinetic energy, and rotational kinetic energy. Contains a problem from Galileo's rolling ball experiment. (YP)

Lockett, Keith

1988-01-01

176

Rotational Energy.  

ERIC Educational Resources Information Center

|Demonstrates several objects rolling down a slope to explain the energy transition among potential energy, translational kinetic energy, and rotational kinetic energy. Contains a problem from Galileo's rolling ball experiment. (YP)|

Lockett, Keith

1988-01-01

177

Rotator Cuff  

Microsoft Academic Search

Over the last 20 yr, the frequency of surgical intervention for rotator cuff tears has risen dramatically. The surgery and\\u000a postoperative rehabilitation has been mostly empirical with little scientific foundation. There is a wide range of pathology\\u000a found in the rotator cuff, particularly the horizontal cleavage tear or delamination, which is frequently observed but rarely\\u000a studied.

Richard O. Evans; Peter J. Hughes; David H. Sonnabend

178

46 CFR 30.10-42 - Machinery space-TB/ALL.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Machinery space-TB/ALL. 30.10-42 Section 30.10-42...PROVISIONS Definitions § 30.10-42 Machinery spaceâTB/ALL. The term machinery space means any space that contains machinery...

2012-10-01

179

46 CFR 30.10-42 - Machinery space-TB/ALL.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Machinery space-TB/ALL. 30.10-42 Section 30.10-42...PROVISIONS Definitions § 30.10-42 Machinery spaceâTB/ALL. The term machinery space means any space that contains machinery...

2011-10-01

180

Operational safety practices as determinants of machinery-related injury on Saskatchewan farms  

Microsoft Academic Search

Agricultural machinery is a major source of injury on farms. The importance of machinery safety practices as potential determinants of injury remains incompletely understood. We examined two such safety practices as risk factors for injury: (1) the presence of safety devices on machinery and (2) low levels of routine machinery maintenance. Our data source was the Saskatchewan Farm Injury Cohort

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

2010-01-01

181

46 CFR 62.50-30 - Additional requirements for periodically unattended machinery plants.  

Code of Federal Regulations, 2010 CFR

...machinery plants include machinery plants and spaces that are automated...minimally attended machinery plant. (a) General. The requirements...category A machinery space, uptakes, or casings. The fire control...hazards have been minimized, and plant status is suitable for...

2010-10-01

182

46 CFR 62.50-30 - Additional requirements for periodically unattended machinery plants.  

Code of Federal Regulations, 2010 CFR

...machinery plants include machinery plants and spaces that are automated...minimally attended machinery plant. (a) General. The requirements...category A machinery space, uptakes, or casings. The fire control...hazards have been minimized, and plant status is suitable for...

2009-10-01

183

Finite Element Analysis of a Permanent Magnet Machine with Two Contra-rotating Rotors  

Microsoft Academic Search

Electrical machines with contra-rotating rotors find applications in direct-drive energy conversion systems and in ship propulsion systems that employ hydraulic machinery with two contra-rotating stages. In this article, the operating characteristics of permanent magnet machines with two contra-rotating rotors moving on opposite sides of a common stator core are studied via two-dimensional finite element analysis. Particular attention is devoted to

Martin Ranlöf; Urban Lundin

2009-01-01

184

Drosophila Myosin II, Zipper, is Essential for Ommatidial Rotation  

PubMed Central

The adult Drosophila retina is a highly polarized epithelium derived from a precursor tissue that is initially symmetric across its dorsoventral axis. Specialized 90° rotational movements of subsets of cells, the ommatidial precursors, establish mirror symmetry in the retinal epithelium. Myosin II, or Zipper (Zip), a motor protein, regulates the rate at which ommatidia rotate: in zip mutants, the rate of rotation is significantly slowed. Zip is concentrated in the cells that we show to be at the likely interface between rotating and non-rotating cells: the boundary between differentiated and undifferentiated cells. Zip is also robust in newly added ommatidial cells, consistent with our model that the machinery that drives rotation should shift to newly recruited cells as they are added to the growing ommatidium. Finally, cell death genes and canonical Wnt signaling pathway members genetically modify the zip phenotype .

Fiehler, Ryan W.; Wolff, Tanya

2007-01-01

185

FOREWORD: 26th IAHR Symposium on Hydraulic Machinery and Systems  

NASA Astrophysics Data System (ADS)

The 26th IAHR Symposium on Hydraulic Machinery and Systems, will be held in Beijing, China, 19-23 August 2012. It is jointly organized by Tsinghua University, State Key Laboratory of Hydro Science and Hydraulic Engineering, China, Jiangsu University, Xi'an University of Technology, China Agricultural University, National Engineering Research Center of Hydropower Equipment and Dongfang Electric Machinery Co., Ltd. It is the second time that China hosts such a symposium. By the end of 2011, the China electrical power system had a total of 1 050 GW installed power, out of which 220 GW was in hydropower plants. The energy produced in hydropower facilities was 662.6 TWh from a total of 4,720 TWh electrical energy production in 2011. Moreover, in 2020, new hydropower capacities are going to be developed, with a total of 180 GW installed power and an estimated 708 TWh/year energy production. And in 2011, the installed power of pumped storage stations was about 25GW. In 2020, the data will be 70GW. At the same time, the number of pumps used in China is increasing rapidly. China produces about 29,000,000 pumps with more than 220 series per year. By the end of 2011, the Chinese pumping system has a total of 950 GW installed power. The energy consumed in pumping facilities was 530 TWh in 2011. The pump energy consumption accounted for about 12% of the national electrical energy production. Therefore, there is a large market in the field of hydraulic machinery including water turbines, pump turbines and a variety of pumps in China. There are also many research projects in this field. For example, we have conducted National Key Research Projects on 1000 MW hydraulic turbine, and on the pump turbines with high head, as well as on the large capacity pumps for water supply. Tsinghua University of Beijing is proud to host the 26th IAHR Symposium on Hydraulic Machinery and Systems. Tsinghua University was established in 1911, after the founding of the People's Republic of China. It was molded into a polytechnic institute focusing on engineering in the nationwide restructuring of universities and colleges undertaken in 1952. At present, the university has 14 schools and 56 departments with faculties in science, engineering, humanities, law, medicine, history, philosophy, economics, management, education and art. The University now has over 25 900 students, including 13 100 undergraduates and 12 800 graduate students. As one of China's most renowned universities, Tsinghua has become an important institution for fostering talents and scientific research. The International Association of Hydro-Environment Engineering and Research (IAHR) particularly promotes the advancement and exchange of knowledge through working groups, specialty symposia, congresses, and publications on water resources, river and coastal hydraulics, risk analysis, energy, environment, disaster prevention, and industrial processes. The IAHR Committee on Hydraulic Machinery and Systems deals with the advancement of technology associated with the understanding of steady and unsteady flow characteristics in hydraulic machinery and conduit systems connected to the machinery. The technology elements include the fluid behaviour within machine components, hydro-elastic behaviour of machine components, cavitation and two phase flow in turbines and pumps, hydraulic machine and plant control systems, the use of hydraulic machines to improve water quality, and even considerations to improve fish survival in their passage through hydro plants. The main emphases of the IAHR Committee on Hydraulic Machinery and Systems are to stimulate research and understanding of the technologies associated with hydraulic machinery and to promote interaction between the machine designers, machine users, the academic community, and the community as a whole. Hydraulic machinery is both cost effective and environmentally friendly. The goals of the IAHR Committee on Hydraulic Machinery and Systems are to improve the value of hydraulic machinery to the end user, to the societies, and to improve societies u

Wu, Yulin; Wang, Zhengwei; Liu, Shuhong; Yuan, Shouqi; Luo, Xingqi; Wang, Fujun

2012-11-01

186

Rotation Matrices  

NSDL National Science Digital Library

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.

Blake, Lewis; Smith, David

2000-12-05

187

39. REBUILT ENGINES AND WINDING MACHINERY: Photocopy of December 1906 ...  

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

39. REBUILT ENGINES AND WINDING MACHINERY: Photocopy of December 1906 photograph of the steam engines and winding machinery at the Washington and Mason Street powerhouse. View towards west. United Railroads of San Francisco rebuilt the damaged engines and winders shown in CA-12-60 and CA-12-61. There are no cables strung over the winders in this photograph, indicating that the firm had yet to resume service. Note the rough shed erected over the engines to protect them from weather while work continued on the reconstruction of the powerhouse. - San Francisco Cable Railway, Washington & Mason Streets, San Francisco, San Francisco County, CA

188

Test Your Sodium Smarts  

MedlinePLUS

... You may be surprised to learn how much sodium is in many foods. Sodium, including sodium chloride ... foods with little or no salt. Test your sodium smarts by answering these 10 questions about which ...

189

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

190

The bearing fault diagnosis of rotating machinery by using Hilbert-Huang transform  

Microsoft Academic Search

Based on improve the drawbacks of Ensemble Empirical Mode Decomposition (EEMD), such as mode mixing and end effect problem, post-processing of EEMD which was improved with HHT approach to solve the problem in this paper. Once the Intrinsic Mode Functions (IMFs) are obtained from the decomposition process, the crucial step is to extract the fault features from the information-contained IMFs.

Tian-Yau Wu; Chun-Chieh Wang; Yu-Liang Chung

2011-01-01

191

Fault diagnosis of rotating machinery based on SVD, FCM and RST  

Microsoft Academic Search

Because there is no criterion available, discretization of numerous data about objects of information systems may be the biggest obstacle to performing inductive learning from instances. Based on a Singular value decomposition of matrix and Fuzzy C-means clustering, a discrete approach of continuous attribute values in a decision table, with continuous condition attribute values and discrete decision attribute values, has

Ru-qiang Li; Jin Chen; Xing Wu; Alfayo A. Alugongo

2005-01-01

192

Feature Extraction Method in Fault Diagnosis Based on Wavelet Fuzzy Network for Power System Rotating Machinery  

Microsoft Academic Search

A new combined fault diagnosis approach for turbo-generator set based on wavelet fuzzy network is proposed. The wavelet transform is used to extract fault characteristics and neural network is used to diagnose the faults. To improve the performance of applying traditional fault diagnosis method to the vibrant faults, a novel method based on the statistic rule is brought forward to

Kang Shanlin; Pang Peilin; Fan Feng; Ding Guangbin

2007-01-01

193

On the application of non-destructive testing techniques on rotating machinery  

Microsoft Academic Search

The diagnosis of artificial defects in a single stage gearbox using two non-destructive techniques (vibration and AE) and advanced signal processing techniques to discriminate between different load and defect states is the scope of the present study. Wavelet based techniques were developed and utilised in order to evaluate the vibration signals and extract diagnostic information out of them. A new

T. H. Loutas; J. Kalaitzoglou; G. Sotiriades; V. Kostopoulos

194

Hydrodynamic Fluid Film Bearings and Their Effect on the Stability of Rotating Machinery.  

National Technical Information Service (NTIS)

The lecture introduces the basic principles of hydrodynamic lubrication and the fundamental equation of Classical Lubrication Theory. The analysis proceeds to derive the static and dynamic performance characteristics of short length cylindrical journal be...

L. S. Andres

2006-01-01

195

Smart bearings: developing a new technique for the condition monitoring of rotating machinery  

Microsoft Academic Search

This paper describes the experimental use of a new technique for the condition monitoring of rolling element bearings. The incremental motion encoder (IME) is a new type of rotary motion sensor that can measure the relative motion between a shaft and its supporting bearing. This motion is directly related to the condition of the bearing. The advantage of this method,

K. Ayandokun; P. A. Orton; N. Sherkat; P. D. Thomas

1997-01-01

196

Interpretation of the results of research on tribocharging in a rotating shaft–oil–lip seal system  

Microsoft Academic Search

A rotating shaft, rotary lip seal, and oil creating a film between the surfaces of a shaft and of a lip of the seal sets up a system, which is relatively simple geometrically, but complex physically and electrochemically. Such a system is characteristic of all machinery, engines, etc. where rotating parts and seals occur. In the experiments and tests performed

Juliusz B. Gajewski; Kazimierz Gatner

2009-01-01

197

Electrical Hardware for Automation Machinery of Recent Cold Mills  

Microsoft Academic Search

Recently installed cold rolling mills use much new automation machinery. This paper evaluates five automation systems commonly used on eight recently installed cold mills. Key parts of several of the schemes are explained in detail. Field results of the systems are reported, together with suggestions for future designs. Automatic slow-down, main drive spindle positioning, entry end coil handling, interstand equipment,

John J. Connors

1973-01-01

198

The Machinery of Management: Leadership (MM2). Workforce 2000 Partnership.  

ERIC Educational Resources Information Center

This curriculum package on leadership--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.

199

Agricultural Machinery - Equipment. Agricultural Cooperative Training. Vocational Agricluture. Revised.  

ERIC Educational Resources Information Center

|Designed for students enrolled in the Agricultural Cooperative Part-Time Training Program, this course of study contains 12 units on agricultural machinery mechanics. Units include (examples of unit topics in parentheses): introduction (agricultural mechanics as an occupation; safety--shop and equipment; use of holding devices, jacks, lifts, and…

Sandlin, David, Comp.; And Others

200

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.

201

The ESCRT machinery in endosomal sorting of ubiquitylated membrane proteins  

Microsoft Academic Search

Selective trafficking of membrane proteins to lysosomes for destruction is required for proper cell signalling and metabolism. Ubiquitylation aids this process by specifying which proteins should be transported to the lysosome lumen by the multivesicular endosome pathway. The endosomal sorting complex required for transport (ESCRT) machinery sorts cargo labelled with ubiquitin into invaginations of endosome membranes. Then, through a highly

Camilla Raiborg; Harald Stenmark

2009-01-01

202

Viral subversion of the host protein synthesis machinery  

Microsoft Academic Search

Viruses are fully reliant on the translation machinery of their host cells to produce the polypeptides that are essential for viral replication. Consequently, viruses recruit host ribosomes to translate viral mRNAs, typically using virally encoded functions to seize control of cellular translation factors and the host signalling pathways that regulate their activity. This not only ensures that viral proteins will

Derek Walsh; Ian Mohr

2011-01-01

203

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.

204

Distant view from downstream of lock with southeast machinery house, ...  

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

Distant view from downstream of lock with southeast machinery house, SF 109, and timber guide wall on left, exterior view of closed lower lock gates and hydro-electric power house and dam in background, view towards west - St. Lucie Canal, St. Lucie Lock No. 1, St. Lucie, Cross State Canal, Okeechobee Intracoastal Waterway, Stuart, Martin County, FL

205

34. VIEW SOUTHEAST, WEST ABUTMENT OF OPERATING MACHINERY LARGE ...  

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

34. VIEW SOUTHEAST, WEST ABUTMENT OF OPERATING MACHINERY - LARGE GEAR AT LEFT CENTER IS 'D' - REFER TO STRAUSS SHEETS #15 AND #18 FOR POWER TRAIN RELATIONSHIPS - Tomlinson Bridge, Spanning Quinnipiac River at Forbes Street (U.S. Route 1), New Haven, New Haven County, CT

206

How to Anchor Machinery in Your School Shop  

ERIC Educational Resources Information Center

|An industrial arts teacher explains the need to mount school shop machinery securely and describes methods of mounting permanently or temporarily. Reasons for anchoring machine tools are safety, accuracy of operation, and the prevention of damage to the machine. Five figures illustrate anchoring and leveling. (MF)|

Walker, John R.

1978-01-01

207

Tracing the evolution of the mitochondrial protein import machinery  

Microsoft Academic Search

Mitochondria are eukaryotic organelles originated from a single bacterial endosymbiosis about 2 billion years ago. One of the earliest events in the evolution of mitochondria was the acquisition of a mechanism that facilitated the import of proteins from cytosol. The mitochondrial protein import machinery consists of dozens of subunits, and they are of modular design. However, to date, it is

Zhen Liu; Xiao Li; Peihu Zhao; Junhong Gui; Wen Zheng; Yizheng Zhang

2011-01-01

208

Agricultural Machinery - Equipment. Agricultural Cooperative Training. Vocational Agricluture. Revised.  

ERIC Educational Resources Information Center

Designed for students enrolled in the Agricultural Cooperative Part-Time Training Program, this course of study contains 12 units on agricultural machinery mechanics. Units include (examples of unit topics in parentheses): introduction (agricultural mechanics as an occupation; safety--shop and equipment; use of holding devices, jacks, lifts, and…

Sandlin, David, Comp.; And Others

209

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

210

Forecast of development trends in Taiwan's machinery industry  

Microsoft Academic Search

Industry transformation oriented toward high technology is being expected in the next 10 years by targeting Taiwan becoming an island of the technology. The machinery industry, which has been playing a vital role in Taiwan's economic development in the past, should be continuously emphasized during the course of the future development. This paper presents a detailed study on the future

Pao-Cheng Chang; Chien-Pin Wang; Benjamin J. C Yuan; Kai-Ting Chuang

2002-01-01

211

COURSE OUTLINE FOR AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS.  

ERIC Educational Resources Information Center

|THE OBJECTIVE OF THE 16-MODULE COURSE OUTLINED IN THIS GUIDE IS TO HELP TEACHERS PREPARE FORMER FARMERS, HIGH SCHOOL DROPOUTS AND GRADUATES, AND UNEMPLOYED, AND EMPLOYED PERSONS FOR OCCUPATIONAL ENTRY AS AGRICULTURAL MACHINERY SETUP MEN, MECHANIC'S HELPERS, MECHANICS, PARTS MEN, AND SERVICE SUPERVISORS. IT WAS DEVELOPED BY A NATIONAL TASK FORCE…

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

212

SELF-ORGANISING NEURAL NETWORKS FOR AUTOMATED MACHINERY MONITORING SYSTEMS  

Microsoft Academic Search

Two fundamental problems that are frequently encountered in automated machinery monitoring and diagnostics are formulated into their corresponding mathematical problems of clustering and trend analysis. The need for and the efficiency of multiple-index based trend analysis, in both accurately evaluating the current condition of a machine system using on-line vibration measurements and obtaining a reliable prediction of its future behaviour,

S. Zhang; R. Ganesan; G. D. Xistris

1996-01-01

213

19. DETAIL VIEW OF MOVABLE SPAN MACHINERY UNDER GRID DECK ...  

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

19. DETAIL VIEW OF MOVABLE SPAN MACHINERY UNDER GRID DECK AT CENTRAL PEDESTAL AREA, SNOWING CENTER RING, RADIALS TO EDGE ROLLERS, GEARS, AND ELECTRICAL BOXES (taken in January 1984) - Sharptown Bridge, Spanning Nanticoke River, State Route 313, Sharptown, Wicomico County, MD

214

Interaction of anesthetics with neurotransmitter release machinery proteins.  

PubMed

General anesthetics produce anesthesia by depressing central nervous system activity. Activation of inhibitory GABA(A) receptors plays a central role in the action of many clinically relevant general anesthetics. Even so, there is growing evidence that anesthetics can act at a presynaptic locus to inhibit neurotransmitter release. Our own data identified the neurotransmitter release machinery as a target for anesthetic action. In the present study, we sought to examine the site of anesthetic action more closely. Exocytosis was stimulated by directly elevating the intracellular Ca(2+) concentration at neurotransmitter release sites, thereby bypassing anesthetic effects on channels and receptors, allowing anesthetic effects on the neurotransmitter release machinery to be examined in isolation. Three different PC12 cell lines, which had the expression of different release machinery proteins stably suppressed by RNA interference, were used in these studies. Interestingly, there was still significant neurotransmitter release when these knockdown PC12 cells were stimulated. We have previously shown that etomidate, isoflurane, and propofol all inhibited the neurotransmitter release machinery in wild-type PC12 cells. In the present study, we show that knocking down synaptotagmin I completely prevented etomidate from inhibiting neurotransmitter release. Synaptotagmin I knockdown also diminished the inhibition produced by propofol and isoflurane, but the magnitude of the effect was not as large. Knockdown of SNAP-25 and SNAP-23 expression also changed the ability of these three anesthetics to inhibit neurotransmitter release. Our results suggest that general anesthetics inhibit the neurotransmitter release machinery by interacting with multiple SNARE and SNARE-associated proteins. PMID:23136341

Xie, Zheng; McMillan, Kyle; Pike, Carolyn M; Cahill, Anne L; Herring, Bruce E; Wang, Qiang; Fox, Aaron P

2012-11-07

215

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

Code of Federal Regulations, 2011 CFR

...tanks from machinery, service and other spaces. 153.233 Section 153.233...tanks from machinery, service and other spaces. (a) To prevent leakage through a single weld failure, the following spaces must be separated from a cargo...

2011-10-01

216

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

Code of Federal Regulations, 2012 CFR

...tanks from machinery, service and other spaces. 153.233 Section 153.233...tanks from machinery, service and other spaces. (a) To prevent leakage through a single weld failure, the following spaces must be separated from a cargo...

2012-10-01

217

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

218

Industry Sector Analysis - Plastics Production Machinery and Chemicals, (Argentina, Colombia, Guatemala, and Honduras).  

National Technical Information Service (NTIS)

The package includes the following ISA's: Argentina, Plastics Packaging Machinery; Colombia, Injection/Extrusion/Blow/Molding/Equipment; Colombia, Chemicals/Raw Materials for the Plastics Industry; Guatemala, Plastics Production Machinery: Extrusion/Injec...

1991-01-01

219

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

Code of Federal Regulations, 2010 CFR

...Small Arms Ammunition PRECIOUS METALS & JEWELRY Costume Jewelry...Lapidary Work Jewelry, Precious Metal Musical Instruments Silverware...General Industrial Machinery Heavy Construction Equipment Rental...Power Transmission Equipment Metal Working Machinery...

2010-07-01

220

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

Code of Federal Regulations, 2010 CFR

...Small Arms Ammunition PRECIOUS METALS & JEWELRY Costume Jewelry...Lapidary Work Jewelry, Precious Metal Musical Instruments Silverware...General Industrial Machinery Heavy Construction Equipment Rental...Power Transmission Equipment Metal Working Machinery...

2009-01-01

221

9 CFR 318.24 - Product prepared using advanced meat/bone separation machinery; process control.  

Code of Federal Regulations, 2010 CFR

...false Product prepared using advanced meat/bone separation machinery; process control...ORGANIZATION AND TERMINOLOGY; MANDATORY MEAT AND POULTRY PRODUCTS INSPECTION AND VOLUNTARY...24 Product prepared using advanced meat/bone separation machinery; process...

2010-01-01

222

9 CFR 318.24 - Product prepared using advanced meat/bone separation machinery; process control.  

Code of Federal Regulations, 2013 CFR

...false Product prepared using advanced meat/bone separation machinery; process control...ORGANIZATION AND TERMINOLOGY; MANDATORY MEAT AND POULTRY PRODUCTS INSPECTION AND VOLUNTARY...24 Product prepared using advanced meat/bone separation machinery; process...

2013-01-01

223

9 CFR 318.24 - Product prepared using advanced meat/bone separation machinery; process control.  

Code of Federal Regulations, 2010 CFR

...false Product prepared using advanced meat/bone separation machinery; process control...ORGANIZATION AND TERMINOLOGY; MANDATORY MEAT AND POULTRY PRODUCTS INSPECTION AND VOLUNTARY...24 Product prepared using advanced meat/bone separation machinery; process...

2009-01-01

224

Accounting for Tillage Equipment and Other Machinery in Agricultural Energy Analysis.  

National Technical Information Service (NTIS)

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 embod...

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

1977-01-01

225

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

226

Rotating Light  

NSDL National Science Digital Library

In this activity, learners explore what happens when polarized white light passes through a sugar solution. Learners use a relatively simple setup to investigate light polarization and reveal beautiful colors. Learners will discover that the colors change as the depth of the sugar solution changes or as the polarizing filter rotates. Learners can also explore what happens when they place a colored filter under the tube holding the sugar solution and/or try a variety of transparent liquids and solutions (e.g. honey) to test whether some are better than others at changing the direction of polarization.

Exploratorium, The

2011-12-06

227

Liquid sodium model of geophysical core convection  

Microsoft Academic Search

Convective motions in Earth's outer core are responsible for the generation of the geomagnetic field. We present liquid sodium convection experiments in a spherical vessel, designed to model the convective state of planetary cores such as the Earth's. Heat transfer, azimuthal fluid velocities, and properties of temperature fluctuations were measured for different rotation rates and temperature drops across the convecting

Woodrow L. Shew; Daniel P. Lathrop

2005-01-01

228

Liquid sodium model of geophysical core convection  

Microsoft Academic Search

Convective motions in Earth’s outer core are responsible for the generation of the geomagnetic field. We present liquid sodium convection experiments in a spherical vessel, designed to model the convective state of planetary cores such as the Earth’s. Heat transfer, azimuthal fluid velocities, and properties of temperature fluctuations were measured for different rotation rates and temperature drops across the convecting

Woodrow L. Shew; Daniel P. Lathrop

2005-01-01

229

Electrochemical Behavior of Sulfide at the Silver Rotating Disc Electrode. I. Polarization Behavior of Silver Sulfide Films.  

National Technical Information Service (NTIS)

A rotating silver disc electrode in a sodium hydroxide solution containing sodium sulfide was used to study the anodic polarization, passivation, and cathodic polarization of silver sulfide films on the silver disc electrode. Anodic limiting currents are ...

K. Shimizu A. Koichi R. A. Osteryoung

1981-01-01

230

A Liquid Sodium Model of a BH Accretion Disk Dynamo  

Microsoft Academic Search

A magnetic dynamo experiment is under construction at the New Mexico Institute of Mining and Technology. The experiment is designed to demonstrate in the laboratory the alpha-omega magnetic dynamo, which is believed to operate in many rotating and conducting astrophysical objects. The experiment uses the Couette flow of liquid sodium between two cylinders rotating with different angular velocities to model

Howard Beckley; Stirling Colgate; Vladimir Pariev; James Weatherall

2002-01-01

231

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

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Category A machinery spaces: Bulkheads and decks-T/ALL. 32... § 32.56-30 Category A machinery spaces: Bulkheads and decksâT/ALL. ...decks that separate category A machinery spaces from cargo pumprooms must be âAâ...

2012-10-01

232

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

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Category A machinery spaces: Bulkheads and decks-T/ALL. 32... § 32.56-30 Category A machinery spaces: Bulkheads and decksâT/ALL. ...decks that separate category A machinery spaces from cargo pumprooms must be âAâ...

2011-10-01

233

Valuers' perception of potential sources of inaccuracy in plant and machinery valuation in Nigeria  

Microsoft Academic Search

Purpose – From the perspective of plant and machinery valuation, this paper aims to assess the factors that constrain accuracy in plant and machinery valuation in the Nigerian context. Design\\/methodology\\/approach – This paper is based on the technical, economic and market infrastructure affecting machinery and equipment valuation in Nigeria and surveyed 150 practicing firms in Lagos to elicit from them

Austin Otegbulu; G. K. Babawale

2011-01-01

234

The endosymbiotic origin of the protein import machinery of chloroplastic envelope membranes  

Microsoft Academic Search

Chloroplasts have evolved a complex proteinaceous machinery to import nuclear-encoded proteins. The origin of this machinery, following the endosymbiotic events leading to chloroplasts, is an intriguing, unresolved problem. Given that cyanobacteria are the probable ancestors of chloroplasts, the genome sequence of Synechocystis sp. PCC 6803 offers a valuable resource to identify putative homologs for components of this protein import machinery

Sigrun Reumann; Kenneth Keegstra

1999-01-01

235

40 CFR 180.521 - Fumigants for grain-mill machinery; tolerances for residues.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Fumigants for grain-mill machinery; tolerances for residues...Tolerances § 180.521 Fumigants for grain-mill machinery; tolerances for residues...Fumigants may be safely used in or on grain-mill machinery in accordance with the...

2011-07-01

236

40 CFR 180.521 - Fumigants for grain-mill machinery; tolerances for residues.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Fumigants for grain-mill machinery; tolerances for residues...Tolerances § 180.521 Fumigants for grain-mill machinery; tolerances for residues...Fumigants may be safely used in or on grain-mill machinery in accordance with the...

2012-07-01

237

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

238

Mechanisms of iron–sulfur cluster assembly: the SUF machinery  

Microsoft Academic Search

Biosynthesis of iron-sulfur clusters is a cellular process which depends on complex protein machineries. Escherichia coli contains two such biosynthetic systems, ISC and SUF. In this review article we specifically make a presentation of the various\\u000a Suf proteins and discuss the molecular mechanisms by which these proteins work together to assemble Fe and S atoms within\\u000a a scaffold and to

M. Fontecave; S. Ollagnier de Choudens; B. Py; F. Barras

2005-01-01

239

Labour saving and cost reduction machinery for sugarcane cultivation  

Microsoft Academic Search

Cultural operations for sugarcane production are very arduous especially planting, interculture, plant protection and harvesting.\\u000a Modern sugarcane machinery and labour saving devices reduce the cost of sugarcane production, help in completion of operation\\u000a timely reduce human drudgery and enable efficient utilization of resources with better quality work output. It helps in increasing\\u000a overall production and productivity. Sugarcane planting requires about

R. N. S. Yadav; Sandeep Yadav; Raj Kumar Tejra

2003-01-01

240

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

241

Nulytely (polyethylene glycol 3350, sodium chloride, sodium ...  

Center for Drug Evaluation (CDER)

Text VersionPage 1. Medication Guide ® NuLYTELY (Noo-lite-ly) (PEG-3350, sodium chloride, sodium bicarbonate and potassium chloride oral solution) ... More results from www.fda.gov/downloads/drugs/drugsafety

242

Guidance on Divalproex Sodium  

Center for Biologics Evaluation and Research (CBER)

Text VersionPage 1. Contains Nonbinding Recommendations Guidance on Divalproex Sodium ... Active ingredient: Divalproex Sodium ... More results from www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation

243

Levothyroxine Sodium Product Information  

Center for Drug Evaluation (CDER)

... Levothyroxine Sodium Product Information. ... Levothyroxine sodium products are used by over 13 million patients. -. Related Information. ... More results from www.fda.gov/drugs/drugsafety/postmarketdrugsafetyinformationforpatientsandproviders

244

Dynamos driven by differential rotation  

NASA Astrophysics Data System (ADS)

Planetary or stellar dynamos are typically though of as driven by convection.However, differential rotation offers an alternative mechanism. Being much easier to implement mechanically it forms the basis for two second generation dynamo experiments in Grenoble and Maryland. Differential rotation effects may also play a role in planetary or stellar dynamos. To explore these possibilities we numerically model the spherical Couette system: a spherical shell filled with a viscous and electrically conducting fluid where the outer boundary rotates with ? and the inner boundary with a slightly slower or faster rate ? + ??. Performing a large number of simulations at different parameters we find that larger ? values (corresponding to low Ekman numbers) allow to decrease the magnetic Prandtl and Reynolds numbers. Similar to what has been found in convectively driven dynamo models, the ordering Coriolis force helps dynamo action. An extrapolation of our results to the parameters of the Maryland experiment suggest that this may not work as a dynamo. The predicted critical magnetic Prandtl number where dynamo action is still possible lies at Pmc ?-10-3 while the Prandtl number of liquid sodium used in the experiment is two orders of magnitude lower. For super-rotation (?? > 0) the produced magnetic field is very similar to recent Saturn field models: It is highly axisymmetric and strongly concentrated at high latitudes. When extrapolating our results to Saturn we find that Pmc is around 10-7 which lies below possible Pm values estimated for Saturn. The required differential rotation is as small as ??/? ? 10-8. Using simple models for the Helium rain though to happen Saturn's metallic envelope we try to access whether this mechanism could maintain this small differential rotation and produce the required power.

Wicht, J.

2012-04-01

245

Mining machinery/equipment/parts/services. Oil and gas field equipment/machinery/parts/supplies (Brazil). Oil and gas field machinery, November 1990. Export trade information  

SciTech Connect

The Brazilian market for oil and gasfield machinery reached approximately $938 million in 1989, of which about $86 million were supplied by imports. The market may reach $2.6 billion by 1993, if indeed the Government of Brazil approves an annual investment plan of $3.5 billion, as proposed by PETROBRAS, the state owned and operated oil and gas production monopoly. According to reports by the Ministry of Economy, investments by PETROBRAS rose from .37% of GDP in 1989 to .41% in 1990. It is predicted that during the next five years its investments will average .56% of GDP. Currently, PETROBRAS imports only about 10% of its equipment needs, but this is expected to more than double by 1993 as a result of a recently adopted procurement policy which calls for purchasing the best available equipment worldwide, at the most favorable price.

Not Available

1990-11-01

246

ACOUSTIC RADIATION FROM ROTATING BLADES—THE KIRCHHOFF METHOD IN AEROACOUSTICS  

Microsoft Academic Search

This paper reviews the current status of discrete frequency noise prediction for rotating blade machinery in the time domain. There are two major approaches both of which can be classified as the Kirchhoff method. These methods depend on the solution of two linear wave equations called the K and FW–H equations. The solutions of these equations for subsonic and supersonic

F. Farassat

2001-01-01

247

Sodium fill of FFTF  

Microsoft Academic Search

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

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

1980-01-01

248

Characterization of the Late Endosomal ESCRT Machinery in Trypanosoma brucei.  

PubMed

The multivesicular body (MVB) is a specialized Rab7+ late endosome (LE) containing multiple intralumenal vesicles that function in targeting ubiquitinylated cell surface proteins to the lysosome for degradation. African trypanosomes lack a morphologically well-defined MVB, but contain orthologs of the ESCRT (Endosomal Sorting Complex Required for Transport) machinery that mediates MVB formation. We investigate the role of TbVps23, an early ESCRT component, and TbVps4, the terminal ESCRT ATPase, in lysosomal trafficking in bloodstream form trypanosomes. Both localize to the TbRab7+ LE and RNAi silencing of each rapidly blocks growth. TbVps4 silencing results in approximately threefold accumulation of TbVps23 at the LE, consistent with blocking terminal ESCRT disassembly. Trafficking of endocytic and biosynthetic cargo, but not default lysosomal reporters, is also negatively affected. Others reported that TbVps23 mediates ubiquitin-dependent lysosomal degradation of invariant surface glycoproteins (ISG65) (Leung et al., Traffic 2008;9:1698-1716). In contrast, we find that TbVps23 ablation does not affect ISG65 turnover, while TbVps4 silencing markedly enhances lysosomal degradation. We propose several models to accommodate these results, including that the ESCRT machinery actually retrieves ISG65 from the LE to earlier endocytic compartments, and in its absence ISG65 traffics more efficiently to the lysosome. Overall, these results confirm that the ESCRT machinery is essential in Trypanosoma brucei and plays important and novel role(s) in LE function in trypanosomes. PMID:23905922

Silverman, Jason S; Muratore, Katherine A; Bangs, James D

2013-08-18

249

16. SOUTH TO VIEW OF CIRCA 1900 MICHIGAN MACHINERY MFG. ...  

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

16. SOUTH TO VIEW OF CIRCA 1900 MICHIGAN MACHINERY MFG. CO. PUNCH PRESS WITH WOOD-BURNING HEATING STOVE LOCATED IN THE CENTER OF THE FACTORY BUILDING. BESIDE THE HEATING STOVE, POINTING TOWARD THE PUNCH PRESS, IS A JIG USED TO POSITION ANGLE STEEL COMPONENTS OF STEEL WINDMILL TOWER LEGS FOR PUNCHING BOLT HOLES. THE SUPPORT FOR THE BRICK FLUE OF THE HEATING STOVE IS CONSTRUCTED FROM SALVAGED GALVANIZED ANGLE STEEL OF THE TYPE USED IN FABRICATING WINDMILL TOWERS MANUFACTURED IN THE FACTORY. - Kregel Windmill Company Factory, 1416 Central Avenue, Nebraska City, Otoe County, NE

250

Validation of vibration measurements for heavy duty machinery diagnostics  

NASA Astrophysics Data System (ADS)

Latest development of distributed condition monitoring for heavy duty machinery has revealed a major challenge concerning reliable data acquisition. Due to frequent failures of diagnostic algorithms caused by incorrectly registered data, validation of vibration signals became a very attractive field of research. The paper shows how classical data acquisition procedures might be enhanced by implementation of signal validation methods based on both machine process parameters signals and machine vibration signals. Presented validation covers analysis of process parameters, data stability constrains and also independent and comparative validation of vibration signals. Benefits of applied techniques are illustrated on real data from a wind turbine.

Jablonski, A.; Barszcz, T.

2013-07-01

251

Operation Analysis for Electrical Machinery Based on Reluctance Network  

NASA Astrophysics Data System (ADS)

In this paper, we describe the basis of a magnetic circuit method and introduce a reluctance network analysis (RNA) proposed by authors. The RNA, which is based on the magnetic circuit method, has some suitable merits for simulating electrical machineries such as a simple analytical model, ease of coupled analysis with electrical circuits, motion, and thermal fields. In addition to these merits, a general-purpose circuit simulator like “SPICE" can be utilized as a solver. We present some applications of the RNA to operation analysis for an orthogonal-core, a switched reluctance motor, and a permanent magnet generator.

Nakamura, Kenji; Ichinokura, Osamu

252

[Evolution on rotation manipulation].  

PubMed

Through review of ancient literature, the developing history of rotation manipulation is traced, various rotation manipulation techniques in different historical periods are analyzed, and evolution process of rotation manipulation is also summarized. It is found that uni-direction rotation was mainly adopted before the establishment of the Republic of China (1911). Influenced by Japanese technique, back and fro rotation took place of the uni-direction rotation, and became the mainstay of the rotation manipulations. However, it is held that the uni-direction rotation has stronger stimulative effects as well as soft tissue relaxation effect, which can be applied for treatment of various diseases. PMID:24032195

Zhang, Yi

2013-07-01

253

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

254

Vesicle formation and endocytosis: function, machinery, mechanisms, and modeling.  

PubMed

Vesicle formation provides a means of cellular entry for extracellular substances and for recycling of membrane constituents. Mechanisms governing the two primary endocytic pathways (i.e., caveolae- and clathrin-mediated endocytosis, as well as newly emerging vesicular pathways) have become the focus of intense investigation to improve our understanding of nutrient, hormone, and drug delivery, as well as opportunistic invasion of pathogens. In this review of endocytosis, we broadly discuss the structural and signaling proteins that compose the molecular machinery governing endocytic vesicle formation (budding, invagination, and fission from the membrane), with some regard for the specificity observed in certain cell types and species. Important biochemical functions of endocytosis and diseases caused by their disruption also are discussed, along with the structures of key components of endocytic pathways and their known mechanistic contributions. The mechanisms by which principal components of the endocytic machinery are recruited to the plasma membrane, where they interact to induce vesicle formation, are discussed, together with computational approaches used to simulate simplified versions of endocytosis with the hope of clarifying aspects of vesicle formation that may be difficult to determine experimentally. Finally, we pose several unanswered questions intended to stimulate further research interest in the cell biology and modeling of endocytosis. PMID:19113823

Parkar, Nihal S; Akpa, Belinda S; Nitsche, Ludwig C; Wedgewood, Lewis E; Place, Aaron T; Sverdlov, Maria S; Chaga, Oleg; Minshall, Richard D

2009-06-01

255

Granuphilin molecularly docks insulin granules to the fusion machinery  

PubMed Central

The Rab27a effector granuphilin is specifically localized on insulin granules and is involved in their exocytosis. Here we show that the number of insulin granules morphologically docked to the plasma membrane is markedly reduced in granuphilin-deficient ? cells. Surprisingly, despite the docking defect, the exocytosis of insulin granules in response to a physiological glucose stimulus is significantly augmented, which results in increased glucose tolerance in granuphilin-null mice. The enhanced secretion in mutant ? cells is correlated with a decrease in the formation of the fusion-incompetent syntaxin-1a–Munc18-1 complex, with which granuphilin normally interacts. Furthermore, in contrast to wild-type granuphilin, its mutant that is defective in binding to syntaxin-1a fails to restore granule docking or the protein level of syntaxin-1a in granuphilin-null ? cells. Thus, granuphilin not only is essential for the docking of insulin granules but simultaneously imposes a fusion constraint on them through an interaction with the syntaxin-1a fusion machinery. These findings provide a novel paradigm for the docking machinery in regulated exocytosis.

Gomi, Hiroshi; Mizutani, Shin; Kasai, Kazuo; Itohara, Shigeyoshi; Izumi, Tetsuro

2005-01-01

256

Vesicle Formation and Endocytosis: Function, Machinery, Mechanisms, and Modeling  

PubMed Central

Abstract Vesicle formation provides a means of cellular entry for extracellular substances and for recycling of membrane constituents. Mechanisms governing the two primary endocytic pathways (i.e., caveolae- and clathrin-mediated endocytosis, as well as newly emerging vesicular pathways) have become the focus of intense investigation to improve our understanding of nutrient, hormone, and drug delivery, as well as opportunistic invasion of pathogens. In this review of endocytosis, we broadly discuss the structural and signaling proteins that compose the molecular machinery governing endocytic vesicle formation (budding, invagination, and fission from the membrane), with some regard for the specificity observed in certain cell types and species. Important biochemical functions of endocytosis and diseases caused by their disruption also are discussed, along with the structures of key components of endocytic pathways and their known mechanistic contributions. The mechanisms by which principal components of the endocytic machinery are recruited to the plasma membrane, where they interact to induce vesicle formation, are discussed, together with computational approaches used to simulate simplified versions of endocytosis with the hope of clarifying aspects of vesicle formation that may be difficult to determine experimentally. Finally, we pose several unanswered questions intended to stimulate further research interest in the cell biology and modeling of endocytosis. Antioxid. Redox Signal. 11, 1301–1312.

Parkar, Nihal S.; Akpa, Belinda S.; Nitsche, Ludwig C.; Wedgewood, Lewis E.; Place, Aaron T.; Sverdlov, Maria S.; Chaga, Oleg

2009-01-01

257

Regulation of alternative splicing by the core spliceosomal machinery.  

PubMed

Alternative splicing (AS) plays a major role in the generation of proteomic diversity and in gene regulation. However, the role of the basal splicing machinery in regulating AS remains poorly understood. Here we show that the core snRNP (small nuclear ribonucleoprotein) protein SmB/B' self-regulates its expression by promoting the inclusion of a highly conserved alternative exon in its own pre-mRNA that targets the spliced transcript for nonsense-mediated mRNA decay (NMD). Depletion of SmB/B' in human cells results in reduced levels of snRNPs and a striking reduction in the inclusion levels of hundreds of additional alternative exons, with comparatively few effects on constitutive exon splicing levels. The affected alternative exons are enriched in genes encoding RNA processing and other RNA-binding factors, and a subset of these exons also regulate gene expression by activating NMD. Our results thus demonstrate a role for the core spliceosomal machinery in controlling an exon network that appears to modulate the levels of many RNA processing factors. PMID:21325135

Saltzman, Arneet L; Pan, Qun; Blencowe, Benjamin J

2011-02-15

258

Regulation of alternative splicing by the core spliceosomal machinery  

PubMed Central

Alternative splicing (AS) plays a major role in the generation of proteomic diversity and in gene regulation. However, the role of the basal splicing machinery in regulating AS remains poorly understood. Here we show that the core snRNP (small nuclear ribonucleoprotein) protein SmB/B? self-regulates its expression by promoting the inclusion of a highly conserved alternative exon in its own pre-mRNA that targets the spliced transcript for nonsense-mediated mRNA decay (NMD). Depletion of SmB/B? in human cells results in reduced levels of snRNPs and a striking reduction in the inclusion levels of hundreds of additional alternative exons, with comparatively few effects on constitutive exon splicing levels. The affected alternative exons are enriched in genes encoding RNA processing and other RNA-binding factors, and a subset of these exons also regulate gene expression by activating NMD. Our results thus demonstrate a role for the core spliceosomal machinery in controlling an exon network that appears to modulate the levels of many RNA processing factors.

Saltzman, Arneet L.; Pan, Qun; Blencowe, Benjamin J.

2011-01-01

259

Molecular machinery of macroautophagy and its deregulation in diseases.  

PubMed

Macroautophagy maintains cellular homeostasis through targeting cytoplasmic contents and organelles into autophagosomes for degradation. This process begins with the assembly of protein complexes on isolation membrane to initiate the formation of autophagosome, followed by its nucleation, elongation and maturation. Fusion of autophagosomes with lysosomes then leads to degradation of the cargo. In the past decade, significant advances have been made on the identification of molecular players that are implicated in various stages of macroautophagy. Post-translational modifications of macroautophagy regulators have also been demonstrated to be critical for the selective targeting of cytoplasmic contents into autophagosomes. In addition, recent demonstration of distinct macroautophagy regulators has led to the identification of different subtypes of macroautophagy. Since deregulation of macroautophagy is implicated in diseases including neurodegenerative disorders, cancers and inflammatory disorders, understanding the molecular machinery of macroautophagy is crucial for elucidating the mechanisms by which macroautophagy is deregulated in these diseases, thereby revealing new potential therapeutic targets and strategies. Here we summarize current knowledge on the regulation of mammalian macroautophagy machineries and their disease-associated deregulation. PMID:21787863

Wong, Alan S L; Cheung, Zelda H; Ip, Nancy Y

2011-07-21

260

Coiled-coil networking shapes cell molecular machinery  

PubMed Central

The highly abundant ?-helical coiled-coil motif not only mediates crucial protein–protein interactions in the cell but is also an attractive scaffold in synthetic biology and material science and a potential target for disease intervention. Therefore a systematic understanding of the coiled-coil interactions (CCIs) at the organismal level would help unravel the full spectrum of the biological function of this interaction motif and facilitate its application in therapeutics. We report the first identified genome-wide CCI network in Saccharomyces cerevisiae, which consists of 3495 pair-wise interactions among 598 predicted coiled-coil regions. Computational analysis revealed that the CCI network is specifically and functionally organized and extensively involved in the organization of cell machinery. We further show that CCIs play a critical role in the assembly of the kinetochore, and disruption of the CCI network leads to defects in kinetochore assembly and cell division. The CCI network identified in this study is a valuable resource for systematic characterization of coiled coils in the shaping and regulation of a host of cellular machineries and provides a basis for the utilization of coiled coils as domain-based probes for network perturbation and pharmacological applications.

Wang, Yongqiang; Zhang, Xinlei; Zhang, Hong; Lu, Yi; Huang, Haolong; Dong, Xiaoxi; Chen, Jinan; Dong, Jiuhong; Yang, Xiao; Hang, Haiying; Jiang, Taijiao

2012-01-01

261

A unique cell division machinery in the Archaea  

PubMed Central

In contrast to the cell division machineries of bacteria, euryarchaea, and eukaryotes, no division components have been identified in the second main archaeal phylum, Crenarchaeota. Here, we demonstrate that a three-gene operon, cdv, in the crenarchaeon Sulfolobus acidocaldarius, forms part of a unique cell division machinery. The operon is induced at the onset of genome segregation and division, and the Cdv proteins then polymerize between segregating nucleoids and persist throughout cell division, forming a successively smaller structure during constriction. The cdv operon is dramatically down-regulated after UV irradiation, indicating division inhibition in response to DNA damage, reminiscent of eukaryotic checkpoint systems. The cdv genes exhibit a complementary phylogenetic range relative to FtsZ-based archaeal division systems such that, in most archaeal lineages, either one or the other system is present. Two of the Cdv proteins, CdvB and CdvC, display homology to components of the eukaryotic ESCRT-III sorting complex involved in budding of luminal vesicles and HIV-1 virion release, suggesting mechanistic similarities and a common evolutionary origin.

Lindas, Ann-Christin; Karlsson, Erik A.; Lindgren, Maria T.; Ettema, Thijs J. G.; Bernander, Rolf

2008-01-01

262

Considerations for the establishment of a machinery monitoring analysis program for surface ships of the US Navy  

SciTech Connect

Personnel at the Oak Ridge National Laboratory were tasked by the US Navy to assist in establishing a maintenance monitoring program for machinery aboard surface ships. Given the number of surface ships, the variety of locations in which they operate, the different types of equipment (rotating and reciprocating, as well as instrumentation), and the different procedures which control the operation and maintenance of a ship, it can be seen, apart from the logistics of organizing such a monitoring program, that the technical issues are as varied and numerous as the ships themselves. Unique methods and procedures have been developed to perform the tasks required on a large scale. Among the specific tasks and technical issues addressed were the development and installation of a data collection and communication instrumentation system for each port, the qualification of measurement methodologies and techniques, the establishment of computer data bases, the evaluation of the instrumentation used, training of civilian and military personnel, development of machinery condition assessment aids using machine design and modal analysis information, and development of computer displays. After these tasks were completed and the appropriate resolution integrated into the program, the final task was the development of a method to continually evaluate the effectiveness of the program, using actual maintenance records.

Strunk, W.D.

1987-01-01

263

29 CFR 1910.213 - Woodworking machinery requirements.  

Code of Federal Regulations, 2010 CFR

...end. (o) Profile and swing-head lathes and wood heel turning machine. (1) Each profile and swing-head lathe shall have all cutting heads covered...2) Cutting heads on wood-turning lathes, whether rotating or not, shall...

2009-07-01

264

29 CFR 1910.213 - Woodworking machinery requirements.  

Code of Federal Regulations, 2010 CFR

...end. (o) Profile and swing-head lathes and wood heel turning machine. (1) Each profile and swing-head lathe shall have all cutting heads covered...2) Cutting heads on wood-turning lathes, whether rotating or not, shall...

2010-07-01

265

Sodium Ferric Gluconate Complex  

Center for Drug Evaluation (CDER)

Text Version... Draft Guidance on Sodium Ferric Gluconate Complex ... Active ingredient: Sodium Ferric Gluconate Complex Form/Route: Injectable; Injection ... More results from www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation

266

Sodium carbonate poisoning  

MedlinePLUS

Sodium carbonate (also known as washing soda or soda ash) is a chemical found in many household ... products. This article focuses on poisoning due to sodium carbonate. This is for information only and not ...

267

Naproxen sodium overdose  

MedlinePLUS

Naproxen sodium is a non-steroidal anti-inflammatory drug (NSAID) used to relieve mild to moderate aches and pains. Naproxen sodium overdose occurs when someone accidentally or intentionally takes ...

268

Sodium in Drinking Water  

MedlinePLUS

Sodium is included on the Drinking Water Contaminant Candidate List (CCL). The CCL is a list of ... are priorities for consideration for rulemaking. Why was sodium included on the Contaminant Candidate List? Will EPA ...

269

Ubiquitin is part of the retrovirus budding machinery  

NASA Astrophysics Data System (ADS)

Retroviruses contain relatively large amounts of ubiquitin, but the significance of this finding has been unknown. Here, we show that drugs that are known to reduce the level of free ubiquitin in the cell dramatically reduced the release of Rous sarcoma virus, an avian retrovirus. This effect was suppressed by overexpressing ubiquitin and also by directly fusing ubiquitin to the C terminus of Gag, the viral protein that directs budding and particle release. The block to budding was found to be at the plasma membrane, and electron microscopy revealed that the reduced level of ubiquitin results in a failure of mature virus particles to separate from each other and from the plasma membrane during budding. These data indicate that ubiquitin is actually part of the budding machinery.

Patnaik, Akash; Chau, Vincent; Wills, John W.

2000-11-01

270

C4 photosynthetic machinery: insights from maize chloroplast proteomics  

PubMed Central

C4 plants exhibit much higher CO2 assimilation rates than C{}3 plants under certain conditions. The specialized differentiation of mesophyll cell and bundle sheath cell type chloroplasts is unique to C4 plants and improves photosynthetic efficiency. Maize (Zea mays) is an important crop and model with C4 photosynthetic machinery. 2DE and high-throughput quantitative proteomics approaches (e.g., isobaric tags for relative and absolute quantitation and shotgun proteomics) have been employed to investigate maize chloroplast structure and function. These proteomics studies have provided valuable information on C4 chloroplast protein components, photosynthesis, and other metabolic mechanisms underlying chloroplast biogenesis, stromal, and membrane differentiation, as well as response to salinity, high/low temperature, and light stress. This review presents an overview of proteomics advances in maize chloroplast biology.

Zhao, Qi; Chen, Sixue; Dai, Shaojun

2013-01-01

271

Compensation: a contemporary regulatory machinery in cardiovascular diseases?  

PubMed

Both clinical and experimental findings at the molecular, cellular, tissue, organ and systematic levels have depicted the presence of a contemporary regulatory machinery namely compensation in various forms of cardiovascular diseases. Compensation is believed to be present and regulated within the scope of a biological entity and represents the initiation of dyshomeostasis. Compensation can be identified in multiple categories and organs in cardiovascular diseases at multiple levels. The capacity to reduce the unfavorable pathological compensation may be a criterion to evaluate the therapeutic effectiveness for cardiovascular diseases. This mini-review tries to take compensation into consideration in the understanding of onset and progression of cardiovascular diseases in particular, and thus, better or optimal therapeutic approaches may be achieved for the prevention and management of cardiovascular diseases. PMID:22565526

Fan, Xiu-Juan; Ren, Jun

2012-12-01

272

C4 photosynthetic machinery: insights from maize chloroplast proteomics.  

PubMed

C4 plants exhibit much higher CO2 assimilation rates than C{}3 plants under certain conditions. The specialized differentiation of mesophyll cell and bundle sheath cell type chloroplasts is unique to C4 plants and improves photosynthetic efficiency. Maize (Zea mays) is an important crop and model with C4 photosynthetic machinery. 2DE and high-throughput quantitative proteomics approaches (e.g., isobaric tags for relative and absolute quantitation and shotgun proteomics) have been employed to investigate maize chloroplast structure and function. These proteomics studies have provided valuable information on C4 chloroplast protein components, photosynthesis, and other metabolic mechanisms underlying chloroplast biogenesis, stromal, and membrane differentiation, as well as response to salinity, high/low temperature, and light stress. This review presents an overview of proteomics advances in maize chloroplast biology. PMID:23596450

Zhao, Qi; Chen, Sixue; Dai, Shaojun

2013-04-15

273

Improving the ergonomics of British Coal's mining machinery.  

PubMed

British Coal Corporation now require ergonomics evaluations to be undertaken on many major items of underground machinery before they are approved for use underground. Ergonomists must therefore be able to provide a service to the industry which is both consistent and reliable. It is especially important where an ergonomics evaluation could influence the purchasing decision on machines which can cost up to pound sterling 2m, that the ergonomist's conclusions/recommendations accurately reflect design issues which have both safety and performance implications. The conclusions must be consistent across assessors and over extended time periods. Ergonomists should also be able to provide designers with the detailed criteria on which their machines are assessed. The Bretby Operability Index was developed to achieve these requirements and it complements ergonomic design guidelines which have previously been developed to help ensure that ergonomics is also taken into consideration early in the design process. PMID:15676871

Mason, S

1992-08-01

274

MULTIFUNCTIONAL NANO-BIO MATERIALS WITHIN CELLULAR MACHINERY  

PubMed Central

Functional nanoscale materials that possess specific physical or chemical properties can leverage energy transduction in vivo. Once these materials integrate with biomolecules they combine physical properties of inorganic material and the biorecognition capabilities of bio-organic moieties. Such nano–bio hybrids can be interfaced with living cells, the elementary functional units of life. These nano–bio systems are capable of bio-manipulation or actuation via altering intracellular biochemical pathways. Thus, nano–bio conjugates are appealing for a wide range of applications from the life sciences and nanomedicine to catalysis and clean energy production. Here we highlight recent progress in our efforts to develop smart nano–bio hybrid materials, and to study their performance within cellular machinery under application of external stimuli, such as light or magnetic fields.

ROZHKOVA, E. A.; ULASOV, I. V.; KIM, D.-H.; DIMITRIJEVIC, N. M.; NOVOSAD, V.; BADER, S. D.; LESNIAK, M. S.; RAJH, T.

2011-01-01

275

MULTIFUNCTIONAL NANO-BIO MATERIALS WITHIN CELLULAR MACHINERY.  

PubMed

Functional nanoscale materials that possess specific physical or chemical properties can leverage energy transduction in vivo. Once these materials integrate with biomolecules they combine physical properties of inorganic material and the biorecognition capabilities of bio-organic moieties. Such nano-bio hybrids can be interfaced with living cells, the elementary functional units of life. These nano-bio systems are capable of bio-manipulation or actuation via altering intracellular biochemical pathways. Thus, nano-bio conjugates are appealing for a wide range of applications from the life sciences and nanomedicine to catalysis and clean energy production. Here we highlight recent progress in our efforts to develop smart nano-bio hybrid materials, and to study their performance within cellular machinery under application of external stimuli, such as light or magnetic fields. PMID:23105163

Rozhkova, E A; Ulasov, I V; Kim, D-H; Dimitrijevic, N M; Novosad, V; Bader, S D; Lesniak, M S; Rajh, T

2011-08-01

276

Ultra-short pulses to signal neuronal growth cone machinery  

NASA Astrophysics Data System (ADS)

Measurable change in the sensory motor machinery of growth cones are induced by non contact femtosecond laser. The focused laser beam with an average power of 3 mW was positioned at some distance away from the closest fillopodia of cortical neurons from primary cell cultures (mice E15). By identifying a set of preliminary parameters we were able to statistically analyze the phenomenological behavior of the fillopodia and classify the effects different conditions of laser light has on the growth cone. Results show that fillopodia become significantly biased towards the focused femtosecond laser light. The same experiment performed with continuous wave (CW) produced results which were indistinguishable from the case where there is no laser light present (placebo condition) indicating no clear effects of the CW laser light on the fillopodia at a distance. These findings show the potential for ultrashort pulsed light to become a new type of pathfinding cue for neuronal growth cones.

Mathew, Manoj; Amat-Roldan, Ivan; Andres, Rosa; Cormack, Iain G.; Artigas, David; Soriano, Eduardo; Loza-Alvarez, Pablo

2007-03-01

277

Sodium clusters in zeolites  

NASA Astrophysics Data System (ADS)

The method of loading sodium clusters in zeolites, consisting of the controlled thermal decomposition of physisorbed sodium azide, is discussed. The influence of the azide loading, the azide decomposition rate and the sintering process on the amount of ionic and metallic sodium clusters in zeolite Y was followed by ESR. The method is compared to other metal deposition techniques.

Grobet, P. J.; Martens, L. R. M.; Vermeiren, W. J. M.; Huybrechts, D. R. C.; Jacobs, P. A.

1989-03-01

278

Rotational preference in gymnastics.  

PubMed

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

2012-07-04

279

Flow Field for an Experimental ? - ? Dynamo: Plume Rotation  

NASA Astrophysics Data System (ADS)

An initial poloidal field is wrapped up by differential rotation, the ?-deformation, in a conducting fluid, Na, to produce an amplified toroidal field. A fraction of the toroidal flux is transformed into and augments the initial poloidal, (quadrapole), field by the ?-deformation, (Parker). The axisymmetric differential rotation is expected in self gravitating rotating bodies and readily produced in the laboratory (Couette flow). The ?-deformation must be non-axisymmetric and should be satisfied by buoyant or driven plumes in a rotating frame, impinging on a surface. These plumes (1) entrain toroidal flux, (2) transport the flux axially to a resistive boundary, (3) rotate the flux, (4) stop rotation close to ? /2 radians, and (5) release the now poloidal flux rapidly. This should lead to a liquid sodium dynamo with gain ~ 1. (This work is supported by EMRTC, IGPP(LANL), and NMIMT )

Colgate, Stirling; Beckley, Howard; Ferrel, Ragnar; Romero, Van; Westpfahl, Dave

1998-11-01

280

49 CFR 1242.47 - Machinery (account XX-27-40).  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Machinery (account XX-27-40). 1242.47 Section...DEPARTMENT OF TRANSPORTATION (CONTINUED) ACCOUNTS, RECORDS AND REPORTS SEPARATION OF...Expenses-Equipment § 1242.47 Machinery (account XX-27-40). Separate common...

2012-10-01

281

The Symbiotic Relationship between Coal Mining Machinery Enterprises and Coal Mining Enterprises in China  

Microsoft Academic Search

This article used VAR model to analyze and verify the symbiosis between Chinese coal mining machinery enterprises and coal mining enterprises from the perspective of static state and dynamic state, it concluded that: there is a co-integration relationship between the actual output value of Chinese coal mining machinery enterprises and the actual value of Chinese coal mining enterprises, namely, there

Fei Wang

2009-01-01

282

Assessment of heavy earth-moving machinery noise vis-a-vis routine maintenance  

Microsoft Academic Search

Exposure to noise from various types of equipment\\/machinery has been identified as a critical health hazard for personnel working in the Indian mining industry. Heavy Earth Moving Machinery (HEMM) used in mines has been identified as a major source of noise, and several earlier investigators have proposed various types of retrofit measures on these machines to reduce noise. The present

Harsha Vardhan; N. C. Karmakar; Y. V. Rao

2006-01-01

283

Machinery Repairman 3 & 2. Rate Training Manual and Nonresident Career Course. Revised.  

ERIC Educational Resources Information Center

|This Rate Training Manual (textbook) and Nonresident Career Course form a correspondence self-study package to teach the theoretical knowledge and mental skills needed by the Machinery Repairman Third Class and Second Class. The 15 chapters in the textbook are (1) Scope of the Machinery Repairman Rating; (2) Toolrooms and Tools; (3) Layout and…

Bynum, Michael H.; Taylor, Edward A.

284

Optimisation of field machinery for an arable farm converting to organic farming  

Microsoft Academic Search

Optimal crop and machinery systems are essential if organic farming is to be economically competitive. The aim of this study was to examine how the capacity of an optimal field machinery system is affected with respect to economy when a farm converts to organic production. An important part of the work was to calculate timeliness factors valid for organic farming.

Carina Gunnarsson; Per-Anders Hansson

2004-01-01

285

HYDRAULIC POWER TRANSFER SYSTEMS. AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS, MODULE NUMBER 9.  

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 BASIC HYDRAULICS AND ITS APPLICATION TO AGRICULTURAL MACHINERY. IT WAS DEVELOPED BY A…

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

286

APPLIED SIMULATION TO EVALUATE DATA LINK PARAMETERS OF CAN-BASED NETWORKS FOR AGRICULTURAL MACHINERY  

Microsoft Academic Search

The number of electronic devices connected to agricultural machinery is increasing to support new agricultural tasks such as spatial variability mapping and variable rate application. The ISO 11783 (also called ISOBUS) standard communication link is a common tendency to integrated different devices on agricultural machinery through an embedded control network. The ISOBUS use the Controller Area Network (CAN) as a

E. P. Godoy; R. V. Sousa; G. T. Tangerino; A. J. V. Porto; R. Y. Inamasu

287

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

288

Vibrations of Rotating Menisci.  

National Technical Information Service (NTIS)

The eigenfrequencies of axially excited rotating menisci in a cylindrical vessel and their corresponding eigenmodes in terms of standing waves were studied. The rotational Bond number, i.e., the ratio of centrifugal forces to interfacial forces, is varied...

C. Chun M. Ehmann J. Siekmann G. Wozniak

1987-01-01

289

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

290

Transformations: Rotation (NLVM)  

NSDL National Science Digital Library

This Java applet enables learners to explore the rotation transformation both informally and within a coordinate system. Students select and compose shapes and manipulate the center and angle of rotation to see the effect on a rotated image. Links to instructions, activities and teacher/parent information are included.

2011-01-01

291

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

Code of Federal Regulations, 2011 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...

2011-10-01

292

Machinery and Tools Used in the Manufacture of Electronic Parts and Components in the Federal Republic of West Germany.  

National Technical Information Service (NTIS)

Content: The Market Potential for American Products; General Marketing Information; Germany; The Electronics Industry; Machinery and Tools for Producing Parts and Components; Structure of the Market; How the Electronics Manufacturer Obtains Machinery; Sel...

1965-01-01

293

Fault detection in variable speed machinery: Statistical parameterization  

NASA Astrophysics Data System (ADS)

Variable speed machinery presents a particular challenge to automated condition-monitoring systems; changes in speed have a strong relation to the vibration response collected by accelerometers—the effect of which may mask fault conditions in standard condition monitoring techniques. In order to account for the effects of this measurable variable, the vibration response will be segmented into speed bins with a small range of speed. The mean and covariance matrix for the feature vectors in each speed bin will be computed in order to derive a statistical novelty boundary for that bin. Each component of these statistical parameters can then be interpolated or regressed in order to derive boundaries for speed segments where no training data is available. A comparison of the use of a statistical decision boundary and support vector boundaries, whose inputs have been centralized and whitened with these statistical parameters, will reveal a stronger classification approach. These methods were validated on data gathered from an experimental gearbox and motor apparatus operating at variable speeds; the results indicate a high degree of separability between data from healthy and faulted states—providing exceptional classification error.

McBain, Jordan; Timusk, Markus

2009-11-01

294

Actin machinery of phagocytic cells: universal target for bacterial attack.  

PubMed

Uptake of microorganisms by eukaryotic cells depends on proper functioning of the actin machinery. It creates a driving force for the cell membrane deformations necessary for ingestion and killing of microbes by phagocytes. Therefore, specific alterations in the activity of the actin apparatus could be favorable for pathogenic bacteria, representing an efficient mechanism in their virulence. Such alterations are supposed to be achieved in two principle ways. One is accomplished via binding of bacterial ligands to certain surface receptors, which initiate subsequent actin cytoskeleton rearrangements. Another is to introduce cytoskeleton-targeted products directly into eukaryotic cells and in this way modulate the activity of the actin apparatus. Indeed, Legionella and some other intracellular parasites possess ligands able to stimulate certain receptors on the surface of phagocytes and possess devices suitable for translocation of effector molecules into eukaryotic cytoplasm. The results of such events could be increased uptake of these microbes and their subsequent transportation to permit multiplication in their intracellular niche. On the contrary, representatives of Clostridium and a number of other extracellular pathogens create products which penetrate eukaryotic cells and disorganize the actin cytoskeleton network, thus making uptake of these pathogens by phagocytes impossible. PMID:12112426

Belyi, Iouri F

2002-06-15

295

Origins and early evolution of the translation machinery  

NASA Astrophysics Data System (ADS)

The modern ribosome is a complex biological machine that is responsible for chiral synthesis of cellular proteins according to the genetic code as specified by a mRNA. Major portions of the ribosomal machinery were likely in place before the last universal common ancestor (LUCA) of life. The early evolution of the ribosome has implications for the origin of the genetic code, the emergence of chirality in peptide synthesis, and the emergence of LUCA. Although codon assignments may remain a mystery, the history of the ribosome provides a context for dating the first usage of mRNA. In the case of chirality, the modern ribosome suggests that a small initial chiral preference for L-amino acids in the environment may have been greatly enhanced by a two step process in which the charging of a primitive tRNA and the subsequent synthesis of a peptide bond both had the same chiral preference. The resulting ability to make largely chiral peptides may have provided an advantage over other prebiotic mechanisms for making peptides. Finally, the late addition of factors such as EF-G may have greatly accelerated the emerging ribosome's ability to synthesize proteins, thereby allowing entities with this novel capability to emerge as the LUCA.

Fox, George E.

2010-08-01

296

The YPWM motif links Antennapedia to the basal transcriptional machinery.  

PubMed

HOX genes specify segment identity along the anteroposterior axis of the embryo. They code for transcription factors harbouring the highly conserved homeodomain and a YPWM motif, situated amino terminally to it. Despite their highly diverse functions in vivo, HOX proteins display similar biochemical properties in vitro, raising the question of how this specificity is achieved. In our study, we investigated the importance of the Antennapedia (Antp) YPWM motif for homeotic transformations in adult Drosophila. By ectopic overexpression, the head structures of the fly can be transformed into structures of the second thoracic segment, such as antenna into second leg, head capsule into thorax (notum) and eye into wing. We found that the YPWM motif is absolutely required for the eye-to-wing transformation. Using the yeast two-hybrid system, we were able to identify a novel ANTP-interacting protein, Bric-à-brac interacting protein 2 (BIP2), that specifically interacts with the YPWM motif of ANTP in vitro, as well as in vivo, transforming eye to wing tissue. BIP2 is a TATA-binding protein associated factor (also known as dTAFII3) that links ANTP to the basal transcriptional machinery. PMID:18367556

Prince, Frédéric; Katsuyama, Tomonori; Oshima, Yoshiteru; Plaza, Serge; Resendez-Perez, Diana; Berry, Meera; Kurata, Shoichiro; Gehring, Walter J

2008-03-26

297

Identification of an iron acquisition machinery in Flavobacterium columnare.  

PubMed

Flavobacterium columnare, a fastidious Gram-negative pathogen and the causative agent of columnaris disease, is one of the most harmful pathogens in the freshwater fish-farming industry. Nevertheless the virulence mechanisms of F. columnare are not well understood. Bacterial iron uptake from the host during infection is an important mechanism of virulence. Here we identified and analyzed part of the iron uptake machinery of F. columnare. Under iron-limited conditions during in vitro growth, synthesis of an outer membrane protein of ~86 kDa was upregulated. This protein was identified as a TonB-dependent ferrichrome-iron receptor precursor (FhuA). Synthesis of siderophores in F. columnare was corroborated by chrome azurol S assays. A putative ferric uptake regulator (Fur) protein was also identified in the F. columnare genome. Structural analysis of the F. columnare Fur protein revealed that it was similar to Fur proteins involved in iron uptake regulation of other bacteria. Furthermore, Salmonella enterica serovar Typhimurium (S. Typhimurium) ?fur mutants were partially complemented by the F. columnare fur gene. We conclude that a siderophore-mediated iron uptake system exists in F. columnare, and fur from F. columnare could partially complement S. Typhimurium ?fur mutant. PMID:24113246

Guan, Lingyu; Santander, Javier; Mellata, Melha; Zhang, Yuangxing; Curtiss, Roy

2013-10-11

298

Modeling the Sodium Atmosphere of the Moon  

NASA Astrophysics Data System (ADS)

Presented are preliminary results obtained using a 3D gas kinetic simulation of the Moon’s sodium atmosphere. We model the evolution of the atmosphere by considering the dynamics of the Moon-Earth-Sun system. To this end, the NASA SPICE toolkit is incorporated into the model to accurately calculate body orientations, velocities and rotation states. This information is used for calculation of source rates, solar radiation pressure and gravitational acceleration, and to account for collisions of sodium atoms with the Earth. In the model, micrometeoroids deliver sodium to the lunar surface, and the atmosphere is produced by thermal desorption (TD), solar wind sputtering (SWS), impact vaporization (IV) and photon simulated desorption (PSD). The recycling and loss of atmospheric sodium due to PSD and SWS redistribute the sodium content of the surface and atmosphere supplied by IV. Because PSD is the dominant source process, the maximum of the injection flux and surface density occurs at the sub-solar point. The model is used to simulate ground-based observations of the exosphere and tail, for comparison. We model the dynamics of the system to examine time variation of sodium production rates, surface density and exospheric morphology in relation to the Moon’s changing heliocentric distance. In addition, we study the effect of PSD from a regolith versus a smooth surface on exospheric morphology. Finally, the model is used to analyze the effect of Earth’s gravity on the extended sodium tail during new moon phase. This work was supported by grant NNX11AB24G from the NASA Lunar Advanced Science and Exploration Research Program.

Tucker, Orenthal; Tenishev, V.; Rubin, M.; Combi, M. R.; Sarantos, M.

2012-10-01

299

Rotational acoustics in spherical Couette experiments  

NASA Astrophysics Data System (ADS)

Helioseismologists retrieve differential rotation profiles within the Sun by inverting the splitting of acoustic modes. We have explored the idea of using a similar technique in fluid dynamics Lab experiments. Spherical Couette experiments are particularly appealing because acoustic modes in a fluid spherical shell are readily computed. Two experimental set-ups have been used for the tests: DTS in Grenoble, and a 30-cm diameter experiment in Maryland. In DTS, liquid sodium is sheared between two concentric spheres in a dipolar magnetic field. The 30-cm experiment has the same geometry but is filled with air. The acoustic waves are generated by tapping the container, or with a loudspeaker, or from internal noise. They are recorded by pressure-sensors mounted flush on the outer sphere. In all cases, sharp spectral peaks are observed, with frequencies that match the expected values. In DTS, some 50 acoustic modes are observed in the 3kHz-50kHz-frequency range. Replacing sodium with argon permits to identify and remove modes that have a different origin. We have investigated the effect of differential rotation on the acoustic modes, by spinning the inner sphere up to 30Hz. Even for this large forcing, the highest frequency modes (>40kHz) show up above the turbulent spectrum. Some of these modes are very clearly split when differential rotation is present. We will present these novel observations, and discuss the potential of the rotational acoustic method in fluid mechanics experiments. This new technique will soon be implemented on the Maryland BigSister dynamo experiment, filled with 15000 litres of liquid sodium.

Triana, S. A.; Nataf, H.-C.; Zimmerman, D.; Adams, M.; Lathrop, D. P.; Schmitt, D.; Cardin, P.; Richard, A.; La Rizza, P.; Masson, J.-P.; Cabanes, S.; Roux, P.

2012-04-01

300

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

301

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

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Category A machinery spaces: Windows and port lights-T/ALL... § 32.56-25 Category A machinery spaces: Windows and port lightsâT/ALL...chapter, boundaries of category A machinery spaces and boundaries of cargo pumprooms...

2011-10-01

302

IS THE UNIVERSE ROTATING?  

SciTech Connect

Models of a rotating universe have been studied widely since the work of Goedel, who showed an example that is consistent with general relativity. By now, the possibility of a rotating universe has been discussed comprehensively in the framework of some types of Bianchi's models, such as Type V, VII, and IX and different approaches have been proposed to constrain the rotation. Recent discoveries of some non-Gaussian properties of the Cosmic Microwave Background Anisotropies (CMBA), such as the suppression of the quadrupole and the alignment of some multipoles draw attention to some Bianchi models with rotation. However, cosmological data, such as those of the CMBA, strongly prefer a homogeneous and isotropic model. Therefore, it is of interest to discuss the rotation of the universe as a perturbation of the Robertson-Walker metric, to constrain the rotating speed by cosmological data and to discuss whether it could be the origin of the non-Gaussian properties of the CMBA mentioned above. Here, we derive the general form of the metric (up to second-order perturbations) which is compatible with the rotation perturbation in a flat LAMBDA-CDM universe. By comparing the second-order Sachs-Wolfe effect due to rotation with the CMBA data, we constrain the angular speed of the rotation to be less than 10{sup -9} rad yr{sup -1} at the last scattering surface. This provides the first constraint on the shear-free rotation of a LAMBDACDM universe.

Su, S.-C.; Chu, M.-C., E-mail: scsu@phy.cuhk.edu.h, E-mail: mcchu@phy.cuhk.edu.h [Department of Physics and Institute of Theoretical Physics, Chinese University of Hong Kong, Shatin (Hong Kong)

2009-09-20

303

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

304

DNA-uptake machinery of naturally competent Vibrio cholerae.  

PubMed

Natural competence for transformation is a mode of horizontal gene transfer that is commonly used by bacteria to take up DNA from their environment. As part of this developmental program, so-called competence genes, which encode the components of a DNA-uptake machinery, are expressed. Several models have been proposed for the DNA-uptake complexes of competent bacteria, and most include a type IV (pseudo)pilus as a core component. However, cell-biology-based approaches to visualizing competence proteins have so far been restricted to Gram-positive bacteria. Here, we report the visualization of a competence-induced pilus in the Gram-negative bacterium Vibrio cholerae. We show that piliated cells mostly contain a single pilus that is not biased toward a polar localization and that this pilus colocalizes with the outer membrane secretin PilQ. PilQ, on the other hand, forms several foci around the cell and occasionally colocalizes with the dynamic cytoplasmic-traffic ATPase PilB, which is required for pilus extension. We also determined the minimum competence regulon of V. cholerae, which includes at least 19 genes. Bacteria with mutations in those genes were characterized with respect to the presence of surface-exposed pili, DNA uptake, and natural transformability. Based on these phenotypes, we propose that DNA uptake in naturally competent V. cholerae cells occurs in at least two steps: a pilus-dependent translocation of the incoming DNA across the outer membrane and a pilus-independent shuttling of the DNA through the periplasm and into the cytoplasm. PMID:24127573

Seitz, Patrick; Blokesch, Melanie

2013-10-14

305

Tombusvirus recruitment of host translational machinery via the 3? UTR  

PubMed Central

RNA viruses recruit the host translational machinery by different mechanisms that depend partly on the structure of their genomes. In this regard, the plus-strand RNA genomes of several different pathogenic plant viruses do not contain traditional translation-stimulating elements, i.e., a 5?-cap structure and a 3?-poly(A) tail, and instead rely on a 3?-cap-independent translational enhancer (3?CITE) located in their 3? untranslated regions (UTRs) for efficient synthesis of viral proteins. We investigated the structure and function of the I-shaped class of 3?CITE in tombusviruses—also present in aureusviruses and carmoviruses—using biochemical and molecular approaches and we determined that it adopts a complex higher-order RNA structure that facilitates translation by binding simultaneously to both eukaryotic initiation factor (eIF) 4F and the 5? UTR of the viral genome. The specificity of 3?CITE binding to eIF4F is mediated, at least in part, through a direct interaction with its eIF4E subunit, whereas its association with the viral 5? UTR relies on complementary RNA–RNA base-pairing. We show for the first time that this tripartite 5? UTR/3?CITE/eIF4F complex forms in vitro in a translationally relevant environment and is required for recruitment of ribosomes to the 5? end of the viral RNA genome by a mechanism that shares some fundamental features with cap-dependent translation. Notably, our results demonstrate that the 3?CITE facilitates the initiation step of translation and validate a molecular model that has been proposed to explain how several different classes of 3?CITE function. Moreover, the virus–host interplay defined in this study provides insights into natural host resistance mechanisms that have been linked to 3?CITE activity.

Nicholson, Beth L.; Wu, Baodong; Chevtchenko, Irina; White, K. Andrew

2010-01-01

306

The accident analysis of mobile mine machinery in Indian opencast coal mines.  

PubMed

This paper presents the analysis of large mining machinery related accidents in Indian opencast coal mines. The trends of coal production, share of mining methods in production, machinery deployment in open cast mines, size and population of machinery, accidents due to machinery, types and causes of accidents have been analysed from the year 1995 to 2008. The scrutiny of accidents during this period reveals that most of the responsible factors are machine reversal, haul road design, human fault, operator's fault, machine fault, visibility and dump design. Considering the types of machines, namely, dumpers, excavators, dozers and loaders together the maximum number of fatal accidents has been caused by operator's faults and human faults jointly during the period from 1995 to 2008. The novel finding of this analysis is that large machines with state-of-the-art safety system did not reduce the fatal accidents in Indian opencast coal mines. PMID:23324038

Kumar, R; Ghosh, A K

2013-01-17

307

Semi-Annual Report on Materials Research in Support of Superconducting Machinery.  

National Technical Information Service (NTIS)

Results are reported of a six-month study, ending March 1976, on candidate materials for superconducting machinery. The results cover five areas--advanced composites, elastic properties, fatigue resistance and fracture toughness, magnetothermal conductivi...

R. P. Reed J. G. Hust M. B. Kasen H. M. Ledbetter D. T. Read

1976-01-01

308

Norway Industry Marketing Profile for Production Machinery, Test Instrumentation and Special Materials for Electronic Components.  

National Technical Information Service (NTIS)

The market research was undertaken to study the present and potential US share of the market in Norway for production machinery, test instrumentation and special materials for electronic components; to examine growth trends in Norwegian end-user industrie...

1977-01-01

309

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

Code of Federal Regulations, 2011 CFR

...ACCESSORIES NECESSARY FOR SAFE OPERATION Protection Against Shifting and Falling Cargo Specific Securement Requirements by Commodity Type § 393.130 What are the rules for securing heavy vehicles, equipment and machinery? (a)...

2011-10-01

310

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

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS PUBLIC NAUTICAL SCHOOL SHIPS Inspections § 167.15-25 Inspection...and machinery. Except as otherwise provided by law or regulations in this subpart, the following...

2012-10-01

311

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

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS PUBLIC NAUTICAL SCHOOL SHIPS Inspections § 167.15-25 Inspection...and machinery. Except as otherwise provided by law or regulations in this subpart, the following...

2011-10-01

312

Dynamics of wrist rotations  

Microsoft Academic Search

Understanding the dynamics of wrist rotations is important for many fields, including biomechanics, rehabilitation and motor neuroscience. This paper provides an experimentally based mathematical model of wrist rotation dynamics in Flexion–Extension (FE) and Radial–Ulnar Deviation (RUD), and characterizes the torques required to overcome the passive mechanical impedance of wrist rotations.We modeled the wrist as a universal joint with non-intersecting axes.

Steven K. Charles; Neville Hogan

2011-01-01

313

Analysis of propensity to patent and science-dependence of large Japanese manufacturers of electrical machinery  

Microsoft Academic Search

Summary  The paper aims to clarify the extent to which the results of scientific-oriented research conducted by corporations are reflected\\u000a in their application-oriented research. Focusing on large Japanese manufacturers of electrical machinery, the paper analyses\\u000a firm-level data on presentations of scientific papers that represent the results of scientific-oriented research activities,\\u000a citations of scientific papers in patents, and inventions. The electrical machinery

Jun Suzuki; Kiminori Gemba; Schumpeter Tamada; Yoshihito Yasaki; Akira Goto

2006-01-01

314

Prediction Method of Machinery Condition Based on Recurrent Neural Networks Models  

Microsoft Academic Search

In order to overcome the disadvantage of traditional feedforward neural networks in long-term prediction of machinery condition, a new neural model, so called the multi-step recurrent prediction model based on recurrent neural network is proposed. A learning algorithm of recurrent model for long-term prediction is also presented, which is supposed to obtain better predictions of machinery condition. The feasibility of

Guangrui Wen; Xining Zhang

2004-01-01

315

The peroxisomal protein import machinery – a case report of transient ubiquitination with a new flavor  

Microsoft Academic Search

.  The peroxisomal protein import machinery displays remarkable properties. Be it its capacity to accept already folded proteins\\u000a as substrates, its complex architecture or its energetics, almost every aspect of this machinery seems unique. The list of\\u000a unusual properties is still growing as shown by the recent finding that one of its central components, Pex5p, is transiently\\u000a monoubiquitinated at a cysteine

C. P. Grou; A. F. Carvalho; M. P. Pinto; I. S. Alencastre; T. A. Rodrigues; M. O. Freitas; T. Francisco; C. Sá-Miranda; J. E. Azevedo

2009-01-01

316

The plastid machinery of apical meristematic cells of potato tubers whose growth is regulated by melaphene  

Microsoft Academic Search

A comparative ultramorphometric study of the plastid machinery of apical meristematic cells of potato (Solanum tuberosum L.) tubers in a normal state (during sprouting) and under treatment with melaphene, a growth regulator of a new generation,\\u000a at a growth-stimulating concentration was performed. The area of the plastid machinery of cells was found to increase under\\u000a the effect of melaphene. A

T. A. Platonova; A. S. Evsyunina; N. P. Korableva

2009-01-01

317

Expression Profiling of Components of the miRNA Maturation Machinery.  

PubMed

The quantitative real-time polymerase chain reaction (qRT-PCR) is a valuable and well-proven technique used to investigate the expression level of multiple components of the microRNA (miRNA) maturation machinery. Here, we describe how to determine the messenger RNA expression levels of components of the miRNA machinery starting from the isolation of the RNA from a tissue biopsy to performance of the qRT-PCR. PMID:24166302

Sand, Michael; Skrygan, Marina

2014-01-01

318

Chemical-biological exploration of the limits of the Ras de- and repalmitoylating machinery.  

PubMed

A dynamic de-/repalmitoylation cycle determines localization and activity of H- and N-Ras. This combined cellular de- and repalmitoylation machinery has been shown to be substrate tolerant--it accepts variation of amino acid sequence, structure and configuration. Here, semisynthetic Ras-proteins in which the C-terminal amino acids are replaced by peptoid residues are used to reveal the first limitations of substrate recognition by the de- and repalmitoylating machinery. PMID:22488913

Görmer, Kristina; Bürger, Marco; Kruijtzer, John A W; Vetter, Ingrid; Vartak, Nachiket; Brunsveld, Lucas; Bastiaens, Philippe I H; Liskamp, Rob M J; Triola, Gemma; Waldmann, Herbert

2012-04-05

319

Filter disk rotator  

NASA Astrophysics Data System (ADS)

A filter disk rotator has been designed and developed in the electronics laboratory of Uttar Pradesh State Observatory (UPSO) for photometric observations. A stepper motor is used to rotate the filter disk in the forward as well as in the reverse directions. A start signal is required to drive the stepper motor to rotate the filter disk. As the filter comes in front of the diaphragm, its position is sensed by the photosensors and displayed on the observer panel and simultaneously a stop signal is generated to stop the motor. The observer can select the required filter at any time and may control the disk rotator remotely.

Gupta, S. K.; Nautiyal, S. L.; Negi, B. S.

1994-06-01

320

Rotating Sky Module  

NSDL National Science Digital Library

This module uses interactive simulations to introduce students to the horizon and celestial coordinate systems and the apparent rotation of objects in the sky (caused by the Earth's rotation). The simulations demonstrate the horizon plane, azimuth, and altitude; compare the advantages and disadvantages of the horizon and celestial coordinate systems, and show the paths of stars and other objects as they 'rotate' through the sky. The 'Rotating Star Explorer' lets users place stars, select the observer's position, and run an animation that shows the movements of the stars in both celestial and horizon views. The module includes a pretest, posttest, and a student guide.

2010-11-09

321

The spatial rotator.  

PubMed

This paper presents a new local volume estimator, the spatial rotator, which is based on measurements on a virtual 3D probe, using computer assisted microscopy. The basic design of the probe builds upon the rotator principle which requires only a few manual intersection markings, thus making the spatial rotator fast to use. Since a 3D probe is involved, it is expected that the spatial rotator will be more efficient than the the nucleator and the planar rotator, which are based on measurements in a single plane. An extensive simulation study shows that the spatial rotator may be more efficient than the traditional local volume estimators. Furthermore, the spatial rotator can be seen as a further development of the Cavalieri estimator, which does not require randomization of sectioning or viewing direction. The tissue may thus be sectioned in any arbitrary direction, making it easy to identify the specific tissue region under study. In order to use the spatial rotator in practice, however, it is necessary to be able to identify intersection points between cell boundaries and test rays in a series of parallel focal planes, also at the peripheral parts of the cell boundaries. In cases where over- and underprojection phenomena are not negligible, they should therefore be corrected for if the spatial rotator is to be applied. If such a correction is not possible, it is needed to avoid these phenomena by using microscopy with increased resolution in the focal plane. PMID:23488880

Rasmusson, A; Hahn, U; Larsen, J O; Gundersen, H J G; Jensen, E B Vedel; Nyengaard, J R

2013-03-12

322

Relationship and interaction between sodium and potassium.  

PubMed

Compared with the Stone Age diet, the modern human diet is both excessive in NaCl and deficient in fruits and vegetables which are rich in K+ and HCO3- -yielding organates like citrate. With the modern diet, the K+/Na+ ratio and the HCO3-/Cl- ratio have both become reversed. Yet, the biologic machinery that evolved to process these dietary electrolytes remains largely unchanged, genetically fixed in Paleolithic time. Thus, the electrolytic mix of the modern diet is profoundly mismatched to its processing machinery. Dietary potassium modulates both the pressor and hypercalciuric effects of the modern dietary excess of NaCl. A marginally deficient dietary intake of potassium amplifies both of these effects, and both effects are dose-dependently attenuated and may be abolished either with dietary potassium or supplemental KHCO3. The pathogenic effects of a dietary deficiency of potassium amplify, and are amplified by, those of a dietary excess of NaCl and in some instances a dietary deficiency of bicarbonate precursors. Thus, in those ingesting the modern diet, it may not be possible to discern which of these dietary electrolytic dislocations is most determining of salt-sensitive blood pressure and hypercalciuria, and the hypertension, kidney stones, and osteoporosis they may engender. Obviously abnormal plasma electrolyte concentrations rarely characterize these dietary electrolytic dislocations, and when either dietary potassium or supplemental KHCO3 corrects the pressor and hypercalciuric effects of these dislocations, the plasma concentrations of sodium, potassium, bicarbonate and chloride change little and remain well within the normal range. PMID:16772638

Morris, R Curtis; Schmidlin, Olga; Frassetto, Lynda A; Sebastian, Anthony

2006-06-01

323

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

Microsoft Academic Search

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

Yanxue Wang; Zhengjia He; Yanyang Zi

2010-01-01

324

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

325

An investigation of angular stiffness and damping coefficients of an axial spline coupling in high-speed rotating machinery  

Microsoft Academic Search

This paper provided an opportunity to quantify the angular stiffness and equivalent viscous damping coefficients of an axial spline coupling used in high-speed turbomachinery. A unique test methodology and data reduction procedures were developed. The bending moments and angular deflections transmitted across an axial spline coupling were measured while a nonrotating shaft was excited by an external shaker. A rotor

C.-P. Roger Ku; James F. Walton Jr.; Jorgen W. Lund

1994-01-01

326

Adaptive fault diagnosis in rotating machines using indicators selection  

NASA Astrophysics Data System (ADS)

Over the past two decades, condition monitoring and faults diagnosis in rotating machinery have been widely studied and reported. In the present paper an algorithm for fault diagnosis in industrial rotating machines facing new operating conditions emergence is developed on the basis of input indicators, extracted from vibrations spectrums. Indicators selection is used to improve diagnosis performances by the help of a hybrid approach using several selection criteria and different classifiers. To validate the performances of this algorithm, experimental tests were conducted on two industrial systems with various operating conditions. The results have proved the effectiveness of the developed algorithm compared to the "J48 decision tree" and also reveal the need to re-select the indicators for reliable monitoring of working conditions.

Khelf, Ilyes; Laouar, Lakhdar; Bouchelaghem, Abdelaziz M.; Rémond, Didier; Saad, Salah

2013-11-01

327

METHOD FOR REMOVING SODIUM OXIDE FROM LIQUID SODIUM  

DOEpatents

A method is described for removing sodium oxide from a fluent stream of liquid sodium by coldtrapping the sodium oxide. Apparatus utilizing this method is disclosed in United States Patent No. 2,745,552. Sodium will remain in a molten state at temperatures below that at which sodium oxide will crystallize out and form solid deposits, therefore, the contaminated stream of sodium is cooled to a temperature at which the solubility of sodium oxide in sodium is substantially decreased. Thereafter the stream of sodium is passed through a bed of stainless steel wool maintained at a temperature below that of the stream. The stream is kept in contact with the wool until the sodium oxide is removed by crystal growth on the wool, then the stream is reheated and returned to the system. This method is useful in purifying reactor coolants where the sodium oxide would otherwise deposit out on the walls and eventually plug the coolant tubes.

Bruggeman, W.H.; Voorhees, B.G.

1957-12-01

328

Improved formulations for rotational core losses in rotating electrical machines  

Microsoft Academic Search

This paper presents the measurement and modeling of rotational core losses in electrical steel sheets and rotating electrical machines. Novel formulations of rotational hysteresis, eddy current, and excess losses in electrical sheet steels with circular and elliptical rotating flux density vectors are reported. These formulations are used together with the finite element method to calculate the core losses in rotating

Jian Guo Zhu; Victor Stuart Ramsden

1998-01-01

329

Rotatable seal assembly. [Patent application; rotating targets  

Microsoft Academic Search

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

C. M. Logan; J. L. Garibaldi

1980-01-01

330

Sodium oxybate for narcolepsy.  

PubMed

Sodium oxybate (Xyrem), also known as gamma-hydroxybutyric acid, is the only therapeutic specifically approved in the USA for the treatment of cataplexy in narcolepsy. The US FDA has recently expanded its indication to include excessive daytime sleepiness associated with narcolepsy. In contrast to the antidepressants and stimulants commonly used to treat the disorder, sodium oxybate is the only compound that addresses both sets of symptoms and, when used properly, is less likely to lead to the development of tolerance and other undesirable side effects. In this review, the results of clinical trials and the place of sodium oxybate in narcolepsy treatment are discussed. PMID:16893342

Scharf, Martin B

2006-08-01

331

Spacecraft component rotation means  

Microsoft Academic Search

A bearing and drive mechanism to rotate spacecraft components, in particular, an array of solar panels is described. A drive shaft designed for long-life capability is required to have high stiffness in addition to axial and radial constraints for precise rotation. A preloaded pair of duplex, contact ball bearings mounted between the shaft and housing provides axial and radial shaft

Binge

1978-01-01

332

Rotator cuff repair  

MedlinePLUS

Rotator cuff repair is a type of surgery to repair a torn tendon in the shoulder. The procedure can be done with a large (" ... Surgery to repair a torn rotator cuff is usually very successful at relieving pain in the shoulder. The procedure may not always return ...

333

Rotator Cuff Injuries  

MedlinePLUS

... had the torn rotator cuff. Treatment for torn rotator cuff includes: Rest Heat or cold to the sore area Medicines that reduce pain and swelling Electrical stimulation of muscles and nerves Ultrasound Cortisone injection Surgery NIH: National Institute on Arthritis and Musculoskeletal and ...

334

Serious rotator cuff injuries.  

PubMed

Usually, serious rotator cuff injuries can be operated upon and a high level of performance can be achieved afer surgery. This is not so for the substantial tears seen in baseball pitchers. However, a damaged rotator cuff can be rehabilitated and can recover from the threatened tear without surgery if detected early enough and given the proper treatment. PMID:9697647

Jobe, F W

1983-07-01

335

ConcepTest: Rotation  

NSDL National Science Digital Library

It takes 24 hoursâone dayâfor one complete rotation of Earth. How long would it take for the Sun to strike every location on the equator if Earth did not rotate on its axis? a. never b. one season c. 24 hours ...

336

Rotating gravitational waves  

NASA Astrophysics Data System (ADS)

We present a cylindrically symmetric solution of the gravitational field equations which describes the propagation of rotating gravitational waves in empty space. The radiation field can be represented as a superposition of incoming and outgoing waves. The singularities of the rotating waves are examined and their significance for the speed-of-light catastrophe is discussed.

Mashhoon, Bahram; Quevedo, Hernando

1990-12-01

337

Rotating fluid bells  

Microsoft Academic Search

We present the results of a combined experimental and theoretical investigation of rotating fluid sheets. When a fluid jet issues downwards from a circular nozzle rotating at sufficient speed, the fluid is deflected into bell-shaped forms whose shapes are prescribed by the balance of inertial, gravitational and curvature forces. We examine the dependence of the flow structure on the governing

Nikos Savva

2005-01-01

338

Imbalance rotating machine balancing  

Microsoft Academic Search

Imbalance analysis is essential in the rotating machine. However, some problems still remain in the aspects of computational efficiency and accuracy. In the present paper, a new method was proposed for estimating the mass imbalance of a rotating shaft by using the vibration signals. This is a new method for the detection of a mass imbalance and its phase position.

Hua Su; Han-Soo Choi; Kil T. Chong

2005-01-01

339

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

340

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.

341

Activity of sodium pump in photosensitized cultured rat cardiomyocytes  

NASA Astrophysics Data System (ADS)

Sodium pump (Na+/K+-ATP-ase) utilizing energy accumulated in macroergic bonds of ATP, maintains physiological sodium and potassium gradients across plasma membrane. This, in turn, preserves cell volume and enables functioning of all Na+-gradient driven cotransporters and exchangers. Therefore, any impairment of Na+/K+-ATP-ase activity results in severe consequences to cell viability. Cardiac cells are equipped with efficient enzymatic machinery capable of coping with oxidative stress. This was the rationale for examining their sodium pump activity upon photosensitization. Cells were incubated with hematoporphyrin dihydrochloride for 1 hour and irradiated using HeNe low-energy laser light (ED: 0.1, 0.3 or 1.0 J/cm2). It was found that Na+/K+-ATP-ase activity in 3-day-old cardiocytes is indirectly stimulated during photosensitization by rapid influx of sodium. The latter was determined by radiometric fluorescent probe SBFI/AM. Five-day-old cardiocytes turned out to be less resistant to photo-oxidative stress as the pump activity was inhibited by 50% in comparison to control cells.

Adamek, Mariusz; Shainberg, Asher; Schwartz, Fidi; Rochkind, Shimon

1997-12-01

342

Accidental systemic exposure to sodium hypochlorite (Chlorox) during hemodialysis.  

PubMed

A case of accidental exposure of a patient undergoing hemodialysis to a sodium hypochlorite solution is reported. A 61-year-old woman was completing a hemodialysis treatment when routine cleaning of the hemodialysis machine was started. Approximately two liters of undiluted sodium hypochlorite cleaning solution (Chlorox) was added to the dialysis bath, soaking the membrane fibers. For less than two minutes the Chlorox-soaked membrane was in contact with the blood returning to the patient. This accident led to massive hemolysis, hyperkalemia, cyanosis, and cardiopulmonary arrest. Hemolysis may have been caused by the hypertonic solution, rapid exothermic protein degradation, alkaline degradation, or another mechanism. The sudden rise and fall in the concentrations of serum electrolytes and subsequent hyperkalemia was the most probable cause for the cardiac arrest. Cardiopulmonary resuscitation was started, the patient was intubated, given oxygen, sodium bicarbonate, atropine, dopamine, and isoproterenol. Sodium thiosulfate 5 g was administered by a nasogastric tube approximately 25 minutes after the cardiac arrest as a neutralizing reducing agent. The patient's condition stabilized, and she recovered after a week of hospitalization. Cleaning solutions used in the routine cleaning of hemodialysis machinery represent potentially toxic agents. Hemodialysis procedures should ensure that cleaning and sterilizing solutions cannot accidentally come into contact with a dialysis machine that is still connected to the patient. PMID:7294048

Hoy, R H

1981-10-01

343

Dynamics of wrist rotations.  

PubMed

Understanding the dynamics of wrist rotations is important for many fields, including biomechanics, rehabilitation and motor neuroscience. This paper provides an experimentally based mathematical model of wrist rotation dynamics in Flexion-Extension (FE) and Radial-Ulnar Deviation (RUD), and characterizes the torques required to overcome the passive mechanical impedance of wrist rotations. We modeled the wrist as a universal joint with non-intersecting axes. The equations of motion of the hand rotating about the wrist joint include inertial, damping, and stiffness terms, with parameter values based on direct measurements (stiffness) or measurements combined with data available in the literature (inertia, damping). We measured the wrist kinematics of six young, healthy subjects making comfortable and fast-paced wrist rotations (±15° in FE, RUD, and combinations) and inserted these kinematic data into the model of wrist rotation dynamics. With this we quantified the torques required to overcome the impedance of wrist rotations and evaluated the relative importance of individual impedance terms as well as interactions between the degrees of freedom. We found that the wrist's passive stiffness is the major impedance the neuromuscular system must overcome to rotate the wrist. Inertia and passive damping only become important for very fast movements. Unlike elbow and shoulder reaching movements, inertial interaction torques are negligible for wrist rotations. Interaction torques due to stiffness and damping, however, are significant. Finally, we found that some model terms (inertial interaction torques, axis offset, and, for moderately sized rotations, non-linearities) can be neglected with little loss of accuracy, resulting in a simple, linear model useful for studies in biomechanics, motor neuroscience, and rehabilitation. PMID:21130996

Charles, Steven K; Hogan, Neville

2010-12-04

344

Sodium bicarbonate and sodium citrate: ergogenic aids?  

PubMed

Numerous studies have used exogenous administration of sodium bicarbonate (NaHCO(3)) and sodium citrate (Na-citrate) in an attempt to enhance human performance. After ingestion of NaHCO(3) and Na-citrate, two observations have been made: (a) There was great individual variability in the ergogenic benefit reached, which can be attributed to the level of physical conditioning of the subjects and to their tolerance of the buffer substance; and (b) the subjects who had ingested NaHCO(3) and Na-citrate show higher levels of pH, bicarbonate, and lactate ions concentrations in their exercising blood than do the subjects who had ingested the placebo. A majority of the studies have suggested that the ingestion of both substances provides an ergogenic effect due to the establishment and maintenance of an elevated pH level during exercise. However, the exact mechanism by which the ergogenic effects occur has not been demonstrated conclusively. Sodium bicarbonate and Na-citrate seem to be effective in activities with a sufficient duration to generate a difference in the hydrogen ion gradient, characterized by a very high intensity and involving large muscular groups. However, in activities of equally high intensity, but with longer duration, the results obtained have been conflicting and inconclusive. PMID:15705037

Requena, Bernardo; Zabala, Mikel; Padial, Paulino; Feriche, Belén

2005-02-01

345

Dalteparin Sodium Injection  

MedlinePLUS

Your doctor has ordered dalteparin sodium, an anticoagulant ('blood thinner'), to prevent harmful blood clots from forming. The drug will be injected under the skin (subcutaneously) once a day. This medication ...

346

Information Profile: Sodium Azide,  

National Technical Information Service (NTIS)

Sodium-azide (26628228) (NA) was described in terms of general properties and uses, toxicity, and occupational exposures. NA has been used in preparation of explosives, herbicides, photosensitive polymers, antibacterials, antidepressants, propellants, den...

A. R. Gregory

1978-01-01

347

Sodium Acetate Hand Warmers  

NSDL National Science Digital Library

In this activity, sodium acetate hand warmers are used to introduce learners to supersaturated solutions, crystallization, and exothermic reactions. This activity guide includes background information, extension ideas, and resources.

Johnson, Jill

2006-01-01

348

Fondaparinux Sodium Letter  

Center for Drug Evaluation (CDER)

Text Version... sodium. 1 Fondaparinux website, http://csd.bodhtree.co.in/drreddys/ fonda/v2/hcp/ (last accessed, December 22, 2011). ... More results from www.fda.gov/downloads/drugs/guidancecomplianceregulatoryinformation

349

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

350

Sodium Balance in Maintenance Hemodialysis  

PubMed Central

Sodium is the principal solute in the extracellular compartment and the major component of serum osmolality. In normal persons in the steady state, sodium homeostasis is achieved by a balance between the dietary intake and the urinary output of sodium, whereas in intermittent hemodialysis patients, sodium balance depends on dietary intake and sodium removal during hemodialysis. Thus, the main goal of hemodialysis is to remove precisely the amount of sodium that has accumulated during the interdialytic period. Sodium removal during hemodialysis occurs via convective (~78%) and diffusive losses (~22%) between dialysate and plasma sodium concentration. The latter (the sodium gradient) is an important factor in the 'fine tuning' of sodium balance during intermittent hemodialysis. Most use fixed dialysate sodium concentrations, but each patient has his/her own plasma sodium concentrations pre-hemodialysis, which are quite reproducible and stable in the long-term. Thus, in many patients, a fixed dialysate sodium concentration will cause a persistent positive sodium balance during dialysis, which could possibly cause increased thirst, interdialytic weight gain, and mortality. Several methods will be discussed to reduce positive sodium balance, including sodium alignment.

2012-01-01

351

Rotational quantum friction.  

PubMed

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. PMID:23005949

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

2012-09-21

352

Rotator cuff interval reconstruction.  

PubMed

Five pairs of cadaveric shoulders underwent posterior and anterior drawer and inferior sulcus tests in five progressive conditions: intact, vented, following opening of the rotator cuff interval, reconstruction of the interval, and transfer of the coracoacromial ligament. The surgical treatments--vented, open rotator cuff interval, reconstruction, and coracoacromial ligament transfer--had an effect compared to the intact shoulders on the inferior stiffness (P = .00002) and on the anteroposterior stiffness (P = .00031). The difference between the stiffness of the reconstructed rotator cuff interval compared to the coracoacromial ligament transfer was significant for loading in the AP direction (P = .006) and for loading in the inferior direction (P = .005). PMID:17134054

Roidis, Nikolaos T; Stennette, Denise; Burkhead, Wayne; Karachalios, Theofilos S; Malizos, Konstantinos N; Itamura, John Minoru

2006-11-01

353

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.

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

2011-01-01

354

Rotator cuff exercises  

MedlinePLUS

... torn due to overuse or injury See also: Rotator cuff problems These injuries often lead to pain, weakness, and stiffness when you use your shoulder. A key part in your recovery is starting exercises to make the muscles and ...

355

Rotator Cuff Injuries  

MedlinePLUS Videos and Cool Tools

... often have rotator cuff injuries, due to the physical nature of their activities. Factors that increase the ... after a good medical history and a thorough physical examination are performed. Tests such as shoulder x- ...

356

The Rotating Mirror.  

ERIC Educational Resources Information Center

|Discusses theory of the rotating mirror, its use in measuring the velocity of the electrical signal in wires, and the velocity of light. Concludes with a description of the manometric flame apparatus developed for analyzing sound waves. (SK)|

Greenslade, Thomas B., Jr.

1981-01-01

357

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.

358

Marshak Lecture: Magnetic Rotation  

NASA Astrophysics Data System (ADS)

The concepts of Magnetic, Antimagnetic and Chiral Rotation are presented. Conditions for their appearance and the experimental signatures are given. Representative examples from different mass regions are discussed. The question of how small the deformation can become is addressed.

Frauendorf, Stefan G.

1998-04-01

359

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

360

Rotating fluid bells  

NASA Astrophysics Data System (ADS)

We present the results of a combined experimental and theoretical investigation of rotating fluid sheets. When a fluid jet issues downwards from a circular nozzle rotating at sufficient speed, the fluid is deflected into bell-shaped forms whose shapes are prescribed by the balance of inertial, gravitational and curvature forces. We examine the dependence of the flow structure on the governing parameters, and present the results of supporting theoretical developments.

Savva, Nikos

2005-11-01

361

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

362

Rotational rate sensor  

DOEpatents

A rate sensor for angular/rotational acceleration includes a housing defining a fluid cavity essentially completely filled with an electrolyte fluid. Within the housing, such as a toroid, ions in the fluid are swept during movement from an excitation electrode toward one of two output electrodes to provide a signal for directional rotation. One or more ground electrodes within the housing serve to neutralize ions, thus preventing any effect at the other output electrode.

Hunter, Steven L. (Livermore, CA)

2002-01-01

363

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 (C4H10FO2P) 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

364

Red giants rotational splittings  

NASA Astrophysics Data System (ADS)

The space missions CoRoT and Kepler provide high quality data that allow to test the transport of angular momentum in stars by the seismic determination of the internal rotation profile. Our aim is to test the validity of the seismic diagnostics for red giant rotation that are based on a perturbative method and to investigate the oscillation spectra when the validity does not hold. We use a non-perturbative approach implemented in the ACOR code [1] that accounts for the effect of rotation on pulsations, and solves the pulsations eigenproblem directly for dipolar oscillation modes. We find that the limit of the perturbation to first order can be expressed in terms of the core rotation and the period separation between consecutive dipolar modes. Above this limit, each family of modes with different azimuthal symmetry m, has to be considered separately. For rapidly rotating red giants, new seismic diagnostics can be found for rotation by exploiting the differences between the period spacings associated with each m-family of modes.

Ouazzani, R. M.; Goupil, M. J.; Dupret, M. A.; Marques, J. P.

2013-03-01

365

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

366

Single-membrane-bounded peroxisome division revealed by isolation of dynamin-based machinery.  

PubMed

Peroxisomes (microbodies) are ubiquitous single-membrane-bounded organelles and fulfill essential roles in the cellular metabolism. They are found in virtually all eukaryotic cells and basically multiply by division. However, the mechanochemical machinery involved in peroxisome division remains elusive. Here, we first identified the peroxisome-dividing (POD) machinery. We isolated the POD machinery from Cyanidioschyzon merolae, a unicellular red alga containing a single peroxisome. Peroxisomal division in C. merolae can be highly synchronized by light/dark cycles and the microtubule-disrupting agent oryzalin. By proteomic analysis based on the complete genome sequence of C. merolae, we identified a dynamin-related protein 3 (DRP3) ortholog, CmDnm1 (Dnm1), that predominantly accumulated with catalase in the dividing-peroxisome fraction. Immunofluorescence microscopy demonstrated that Dnm1 formed a ring at the division site of the peroxisome. The outlines of the isolated dynamin rings were dimly observed by phase-contrast microscopy and clearly stained for Dnm1. Electron microscopy revealed that the POD machinery was formed at the cytoplasmic side of the equator. Immunoelectron microscopy showed that the POD machinery consisted of an outer dynamin-based ring and an inner filamentous ring. Down-regulation of Dnm1 impaired peroxisomal division. Surprisingly, the same Dnm1 serially controlled peroxisomal division after mitochondrial division. Because genetic deficiencies of Dnm1 orthologs in multiperoxisomal organisms inhibited both mitochondrial and peroxisomal proliferation, it is thought that peroxisomal division by contraction of a dynamin-based machinery is universal among eukaryotes. These findings are useful for understanding the fundamental systems in eukaryotic cells. PMID:23696667

Imoto, Yuuta; Kuroiwa, Haruko; Yoshida, Yamato; Ohnuma, Mio; Fujiwara, Takayuki; Yoshida, Masaki; Nishida, Keiji; Yagisawa, Fumi; Hirooka, Shunsuke; Miyagishima, Shin-ya; Misumi, Osami; Kawano, Shigeyuki; Kuroiwa, Tsuneyoshi

2013-05-21

367

Sodium/Potassium homeostasis in the cell.  

PubMed

All animals are characterized by steep gradients of Na(+) and K(+) across the plasma membrane, and in spite of their highly similar chemical properties, the ions can be distinguished by numerous channels and transporters. The gradients are generated by the Na(+),K(+)-ATPase, or sodium pump, which pumps out Na(+) and takes up K(+) at the expense of the chemical energy from ATP. Because the membrane is more permeable to K(+) than to Na(+), the uneven ion distribution causes a transmembrane voltage difference, and this membrane potential forms the basis for the action potential and for much of the neuronal signaling in general. The potential energy stored in the concentration gradients is also used to drive a large number of the secondary transporters responsible for transmembrane carriage of solutes ranging from sugars, amino acids, and neurotransmitters to inorganic ions such as chloride, inorganic phosphate, and bicarbonate. Furthermore, Na(+) and K(+) themselves are important enzymatic cofactors that typically lower the energy barrier of substrate binding.In this chapter, we describe the roles of Na(+) and K(+) in the animal cell with emphasis on the creation and usage of the steep gradients across the membrane. More than 50 years of Na(+),K(+)-ATPase research has revealed many details of the molecular machinery and offered insights into how the pump is regulated by post-translational modifications and specific drugs. PMID:23595670

Clausen, Michael Jakob Voldsgaard; Poulsen, Hanne

2013-01-01

368

Sodium sulfur battery seal  

DOEpatents

This disclosure is directed to an improvement in a sodium sulfur battery construction in which a seal between various battery compartments is made by a structure in which a soft metal seal member is held in a sealing position by holding structure. A pressure applying structure is used to apply pressure on the soft metal seal member when it is being held in sealing relationship to a surface of a container member of the sodium sulfur battery by the holding structure. The improvement comprises including a thin, well-adhered, soft metal layer on the surface of the container member of the sodium sulfur battery to which the soft metal seal member is to be bonded.

Mikkor, Mati (Ann Arbor, MI)

1981-01-01

369

Critical slowing down and magnetically-induced self-pulsing in a sodium-filled Fabry-Perot resonator  

Microsoft Academic Search

The observation of critical slowing down and of self pulsing in a Fabry-Perot resonator (FP) filled with sodium atoms under conditions of transverse optical pumping is discussed. The dye laser, optically isolated from the FP by means of a Faraday rotator is detuned from the Na D1 line by 10 to 20 GHz. The sodium sample is placed in a

J. Mlynek; F. Mitschke; W. Lange

1984-01-01

370

Spiral Nebula Rotation  

NSDL National Science Digital Library

The EJS Spiral Nebula Rotation model illustrates a simplified version of Adrian van Maanen's method for measuring the rotations (or internal motions) of spiral nebulae. Van Maanen used a device called a "blink stereocomparator" that allowed him to rapidly switch between viewing one image of a spiral nebula and another image of the same nebula taken at a later date. After aligning the foreground stars (which were not part of the nebula) in the two images, van Maanen made measurements of the displacements of various points in the nebula from one image to the other. The simulation provides two images of the spiral nebula Messier 101, derived from a Hubble Space Telescope image. The user can "blink" back and forth between these two images. Foreground "stars" (red dots) have been superimposed on the two images. The user must first align the foreground stars by rotating the second image of the nebula. Then the displacements and distances from center of various points in the nebula can be measured using the draggable arrows in the simulation, and these values can be used to determine the angle by which the nebula has rotated in the time interval between the two images. It should be emphasized that the rotation effect illustrated in this simulation is NOT REAL. Although spiral galaxies do rotate, the angle by which they rotate during a human lifetime is so small as to be undetectable. The purpose of this simulation is simply to illustrate van Maanen's method, because van Maanen's (spurious) results were historically important in that they led several astronomers to reject the idea that spiral nebulae are independent galaxies (at least for a while).

Timberlake, Todd

2011-05-18

371

STRUCTURE OF UNIFORMLY ROTATING STARS  

SciTech Connect

Zero-age main-sequence models of uniformly rotating stars have been computed for 10 masses between 1.625 and 8 M{sub sun} and for 21 rotation rates from zero to nearly critical rotation. The surface shape is used to distinguish rotation rather than the surface equatorial velocity or the rotation rate. Using the surface shape is close, but not quite equivalent, to using the ratio of the rotation rate to the critical rotation rate. Using constant shape as the rotation variable means that it and the mass are separable, something that is not true for either the rotation rate or surface equatorial velocity. Thus, a number of properties, including the ratio of the effective temperature anywhere on the surface to the equatorial temperature, are nearly independent of the mass of the model, as long as the rotation rate changes in such a way as to keep the surface shape constant.

Deupree, Robert G., E-mail: bdeupree@ap.smu.ca [Institute for Computational Astrophysics, Department of Astronomy and Physics, Saint Mary's University, Halifax, NS B3H 3C3 (Canada)

2011-07-10

372

Rapidly rotating spherical Couette flow in a dipolar magnetic field: An experimental study of the mean axisymmetric flow  

Microsoft Academic Search

In order to explore the magnetostrophic regime expected for planetary cores, in which the Lorentz forces balance the Coriolis forces, experiments have been conducted in a rotating sphere filled with liquid sodium, with an imposed dipolar magnetic field (the DTS setup). The field is produced by a permanent magnet enclosed in an inner sphere, which can rotate at a separate

Henri-Claude Nataf; T. Alboussière; Daniel Brito; Philippe Cardin; Nadège Gagnière; Dominique Jault; Denys Schmitt

2008-01-01

373

Rotating fields in general relativity  

NASA Astrophysics Data System (ADS)

Research work on a particular aspect of rotating fields in general relativity is discussed. The relevant aspects of general relativity are briefly introduced, and a detailed derivation is given of the Wehl-Lewis-Papapetrou form of the stationary axially symmetric metric. The Kerr and Tomimatsu-Sato forms of the rotating interior and exterior solutions of the Einstein equations are then discussed. The applications of the theory to rotating neutral dust, rotating Einstein-Maxwell fields, and rotating charged dust are examined.

Islam, J. N.

374

The Rotator Cuff Functional Index  

Microsoft Academic Search

Background: Despite improvements in the clinical assessment of rotator cuff injuries, shortcomings exist in diagnosing rotator cuff tears.Purpose: To formulate a clinical rotator cuff functional index for predicting rotator cuff tears based on handheld dynamometer measurements for shoulder strength testing and to assess its ability to diagnose a rotator cuff tear.Study Design: Cohort study (diagnosis); Level of evidence, 2.Methods: Preoperative

Daryl C. Osbahr; George A. C. Murrell

2006-01-01

375

Plasma sodium and hypertension  

Microsoft Academic Search

Plasma sodium and hypertension. Dietary salt is the major cause of the rise in the blood pressure with age and the development of high blood pressure in populations. However, the mechanisms whereby salt intake raises the blood pressure are not clear. Existing concepts focus on the tendency for an increase in extracellular fluid volume (ECV), but an increased salt intake

Hugh E. de Wardener; Feng J. He; Graham A. MacGregor

2004-01-01

376

Sodium sulfur battery seal  

DOEpatents

This invention is directed to a seal for a sodium sulfur battery in which a flexible diaphragm sealing elements respectively engage opposite sides of a ceramic component of the battery which separates an anode compartment from a cathode compartment of the battery.

Topouzian, Armenag (Birmingham, MI)

1980-01-01

377

A rotating disk study of gold dissolution by bromine  

NASA Astrophysics Data System (ADS)

Gold dissolution with bromine was studied using the rotating disk technique with Geobrom™ 3400 as a source of bromine. The parameters studied were speed of rotation, lixiviant concentration, pH, temperature, sulfuric acid and hydrochloric acid concentrations, and the concentrations of various cations (i.e., copper, iron, zinc, aluminum, manganese, potassium, and sodium) and anions (i.e., chloride, bromide, sulfate, nitrate, and iodide). According to the Lavich plot and activation energy, gold dissolution is controlled by a chemical reaction rate. Copper, iron, and manganese in their highest oxidation states, as well as aluminum, zinc, sodium, and potassium, have no effect on the rate of gold dissolution. The presence of manganous ion substantially decreases the gold dissolution rate. The kinetic performance of bromine was found to be dramatically better than the performance of cyanide and thiourea.

Pesic, Batric; Sergent, Rodney H.

1991-12-01

378

CCMR: Rotating Bose Gas  

NSDL National Science Digital Library

The study of cold atoms is currently an extremely exciting field. New technologies are allowing us to reach much lower temperatures experimentally. Although the Bose-Einstein condensate was predicted in 1925, it was not observed experimentally until recently. Using laser technology and evaporative cooling techniques, we can cool and trap the atoms. A small system of atoms at very low temperatures has many interesting properties. The effect of rotation on a Bose gas is different from what is seen in the macroscopic world, and it is thus interesting to study how angular momentum enters the system. In a macroscopic system, angular momentum is gained through frictional forces. Studying a rotating Bose gas allows us to look at friction at the atomic scale. We study two atoms in a rotating harmonic trap.

Ding, Fiona

2007-08-29

379

Rotational Spectroscopy Meets Theory  

NASA Astrophysics Data System (ADS)

Rotational spectroscopy is known to be a technique widely used to infer information on molecular structure and dynamics. In the last decades, its role in the field of atmospheric and astrophysical investigations has rapidly grown up. However, several are the challenging aspects in rotational spectroscopy, since the detection and analysis of spectra as well as interpretation of obtained results are not at all straightforward. Quantum chemistry has reached such an accuracy that can be used to disentangle these challenging situations by guiding the experimental investigation, assisting in the determination of the spectroscopic parameters, and extracting information of chemical interest. This presentation provides an overview of the theoretical background and computational requirements needed for the accurate evaluation of the spectroscopic parameters of relevance to rotational spectroscopy. The role of theory in guiding and supporting experiment is detailed through a few examples and the interplay of experiment and theory is discussed in terms of the information of physical and chemical interest that can be derived.

Puzzarini, Cristina

2013-06-01

380

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.

381

MIX1: An Essential Component of the C. elegans Mitotic Machinery Executes X Chromosome Dosage Compensation  

Microsoft Academic Search

We show that a functional component of the C. elegans mitotic machinery regulates X chromosome gene expression. This protein, MIX-1, is a member of the dosage compensation complex that associates specifically with hermaphrodite X chromosomes to reduce their gene expression during interphase. MIX-1 also associates with all mitotic chromosomes to ensure their proper segregation. Both dosage compensation and mitosis are

Jason D Lieb; Michael R Albrecht; Pao-Tien Chuang; Barbara J Meyer

1998-01-01

382

Technological leadership and variety: A Data Envelopment Analysis for the French machinery industry  

Microsoft Academic Search

We investigate structure and structural change within the French machinery industry from 1984–1991 in order to detect the apparent technology leaders and to get an account of the technological variety within the sector. The theoretical background of the paper is found in modern approaches to the economics of innovation and technology, where the very nature of technological knowledge and the

Jean Bernard; Uwe Cantner; Georg Westermann

1996-01-01

383

SURVEY OF TECHNICAL PREVENTATIVE MEASURES TO REDUCE WHOLE-BODY VIBRATION EFFECTS WHEN DESIGNING MOBILE MACHINERY  

Microsoft Academic Search

Engineering solutions to minimize the effects on operators of vibrating mobile machinery can be conveniently grouped into three areas: •Reduction of vibration at source by improvement of the quality of terrain, careful selection of vehicle or machine, correct loading, proper maintenance, etc.•Reduction of vibration transmission by incorporating suspension systems (tyres, vehicle suspensions, suspension cab and seat) between the operator and

P. Donati

2002-01-01

384

Optimizing life cycle cost of complex machinery with rotable modules using simulation  

Microsoft Academic Search

Purpose – Maintenance is constantly challenged to increase productivity by maximizing up-time and reliability while at the same time reducing maintenance expenditure and investment. Traditional reliability models are based on detailed statistical analysis of individual component failures. For complex machinery, especially involving many rotable parts, such analyses are difficult and time-consuming. This paper aims to propose an alternative method for

M. El Hayek; E. van Voorthuysen; D. W. Kelly

2005-01-01

385

Explicit Finite Element Analysis of Spring-Energized Rotary Face Seal for Industrial Process Machinery  

Microsoft Academic Search

Reliable sealing solutions are extremely important in process machinery because sealing failures can cause damage of equipment or even downtime, incurring expenses that are substantially higher than the costs of just replacing the damaged seals. Consequently, new seal designs must be carefully evaluated before they can be adopted. In this study, explicit finite element analysis was used for evaluating a

Olof Calonius; Matti Pietola

386

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.

387

Genetic and biochemical dissection of the mitochondrial protein-import machinery  

Microsoft Academic Search

Mitochondria import most of their proteins from the cytosol. A multi-subunit machinery accomplishes the translocation of precursor polypeptides into across the two mitochondrial membranes. Within recent years more than 20 different proteins have been identified which are involved in mitochondrial protein import. This review summarizes the successful genetic and biochemical approaches that led to the identification of these transport and

M. Ktibrich; K. Dietmeier; N. Pfanner

1995-01-01

388

PREDICTING SUITABLE DAYS FOR FIELD MACHINERY OPERATIONS IN A WHOLE FARM SIMULATION  

Technology Transfer Automated Retrieval System (TEKTRAN)

Accurate information on the days suitable for field operations is important in the design, development, and selection of efficient machinery systems for crop production. The number of days suitable varies widely with climate, soil characteristics, and time of year but this information is normally di...

389

Conservation of the RNA Transport Machineries and Their Coupling to Translation Control across Eukaryotes  

PubMed Central

Restriction of proteins to discrete subcellular regions is a common mechanism to establish cellular asymmetries and depends on a coordinated program of mRNA localization and translation control. Many processes from the budding of a yeast to the establishment of metazoan embryonic axes and the migration of human neurons, depend on this type of cell polarization. How factors controlling transport and translation assemble to regulate at the same time the movement and translation of transported mRNAs, and whether these mechanisms are conserved across kingdoms is not yet entirely understood. In this review we will focus on some of the best characterized examples of mRNA transport machineries, the “yeast locasome” as an example of RNA transport and translation control in unicellular eukaryotes, and on the Drosophila Bic-D/Egl/Dyn RNA localization machinery as an example of RNA transport in higher eukaryotes. This focus is motivated by the relatively advanced knowledge about the proteins that connect the localizing mRNAs to the transport motors and the many well studied proteins involved in translational control of specific transcripts that are moved by these machineries. We will also discuss whether the core of these RNA transport machineries and factors regulating mRNA localization and translation are conserved across eukaryotes.

Vazquez-Pianzola, Paula; Suter, Beat

2012-01-01

390

The Machinery Question and the Making of Political Economy 1815–1848  

Microsoft Academic Search

For those who lived through it, Britain's Industrial Revolution was experienced as the Machinery Question. It was far from clear to contemporaries whether the first forms of mechanized factory production heralded an inevitable economic revolution, or were but one course among several which might be modified or eventually rejected altogether, Opinion about the necessity or beneficence of machines was profoundly

Maxine Berg

1981-01-01

391

Ruble Price Levels and Dollar-Ruble Ratios of Soviet Machinery in the 1960s.  

National Technical Information Service (NTIS)

Evidence from Soviet sources bearing on the movement of the wholesale prices of machinery is assessed with a view to inferring crude price indexes. Official indexes, constructed for the 1960s from a limited sample and weighted by 1961 output values, show ...

A. S. Becker

1973-01-01

392

The impact of office machinery, and computer capital on the demand for heterogeneous labour  

Microsoft Academic Search

We study the impact of office and computing machinery (OCM) on the labour demand for workers with different educational levels. The empirical analysis relies on a system of demand equations that nests the translog, the generalised Leontief and the normalised quadratic specifications. Using panel data on 35 German industries, we find little evidence for a robust substitutability relationship between unskilled

Martin Falk; Bertrand M. Koebel

2004-01-01

393

Relevance of the light signaling machinery for cellulase expression in trichoderma reesei (hypocrea jecorina)  

Microsoft Academic Search

BACKGROUND: In nature, light is one of the most important environmental cues that fungi perceive and interpret. It is known not only to influence growth and conidiation, but also cellulase gene expression. We therefore studied the relevance of the main components of the light perception machinery of Trichoderma reesei (Hypocrea jecorina), ENV1, BLR1 and BLR2, for production of plant cell

Miklós Gyalai-Korpos; Gáspár Nagy; Zoltán Mareczky; André Schuster; Kati Réczey; Monika Schmoll

2010-01-01

394

Causes and Effects of Escalating Prices for Deep-Mine Machinery (1950 to 1981).  

National Technical Information Service (NTIS)

This report examines the issue of escalating deep-coal-mine machinery prices in the 1970s. Producer price trends, mining investment costs, mine asset values, and discussions with used-equipment brokers all indicated that deep-mining-equipment prices escal...

J. G. Baker

1983-01-01

395

Worker noise exposures from diesel and electric surface coal mining machinery  

Microsoft Academic Search

comparative study of noise produced from diesel and electric mining machinery in an opencast coal mine was made. It was found that the diesel machines produced higher environmental noise than the electric machines. The projected and measured operator's noise dose for 8-hour also showed that the diesel machines produced higher noise than the electric machines. The recorded sound levels and

S. Roy; G. R. Adhikari

2007-01-01

396

Summary of some selected underground coal-mine-face-machinery fatalities-1973  

Microsoft Academic Search

This Mining Enforcement and Safety Administration report gives a brief description of face machinery accidents that occurred during 1973. Accidents are grouped into 10 major categories as follows: (1) Pushing or Pulling mine equipment with other equipment; (2) performing tasks under unblocked elevated equipment; (3) operator of self-propelled equipment not facing direction of travel; (4) tramming self-propelled face equipment through

Wancheck

1975-01-01

397

How used machinery helps get production started on large coal-mining projects  

Microsoft Academic Search

Used mining machinery can greatly improve the economics of certain coal-mining projects, but the acquisition of suitable used equipment in good condition at the right time can, however, involve problems in logistics, calling for well-orchestrated project management, including inspection and purchasing skills. Worldwide connections and the ability to expedite, inspect, and make complicated shipping arrangements are prerequisite. These activities must

1978-01-01

398

Alu Exonization Events Reveal Features Required for Precise Recognition of Exons by the Splicing Machinery  

Microsoft Academic Search

Despite decades of research, the question of how the mRNA splicing machinery precisely identifies short exonic islands within the vast intronic oceans remains to a large extent obscure. In this study, we analyzed Alu exonization events, aiming to understand the requirements for correct selection of exons. Comparison of exonizing Alus to their non-exonizing counterparts is informative because Alus in these

Schraga Schwartz; Nurit Gal-Mark; Nir Kfir; Ram Oren; Eddo Kim; Gil Ast

2009-01-01

399

Family Ownership, Investment Behavior, and Firm Performance ?? Evidence from Japanese Electric Machinery Industry  

Microsoft Academic Search

We studied family firms in the Japanese electric machinery industry. First, we compared firm perfor- mance between family and non-family firms, and found that family firms show higher profitability. Sec- ond, we tried to distinguish among reasons for better performance of family firms. The results of several t-tests and regression analyses suggest that selecting top management from the pool restricted

Shigeru Asaba; Eiji Kunugita

400

ADJUSTMENT, MAINTENANCE, AND REPAIR OF SMALL GASOLINE ENGINES. AGRICULTURAL MACHINERY--SERVICE OCCUPATIONS, MODULE NUMBER 12.  

ERIC Educational Resources Information Center

ONE OF 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 COMPETENCY IN THE ADJUSTMENT, MAINTENANCE, AND REPAIR OF SMALL GASOLINE ENGINES. IT WAS DEVELOPED BY A NATIONAL TASK…

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

401

The SNARE Machinery Is Involved in Apical Plasma Membrane Trafficking in MDCK Cells  

Microsoft Academic Search

We have investigated the controversial in- volvement of components of the SNARE (soluble N -ethyl maleimide-sensitive factor (NSF) attachment protein (SNAP) receptor) machinery in membrane traffic to the apical plasma membrane of polarized epithelial (MDCK) cells. Overexpression of syntaxin 3, but not of syntaxins 2 or 4, caused an inhibition of TGN to apical transport and apical recycling, and leads

Seng Hui Low; Steven J. Chapin; Christian Wimmer; Sidney W. Whiteheart; László G. Kömüves; Keith E. Mostov; Thomas Weimbs

1998-01-01

402

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.

403

Functional architecture of the nucleus: organizing the regulatory machinery for gene expression, replication and repair  

Microsoft Academic Search

The organization and sorting of regulatory information for transcription, replication and repair depends on components of nuclear architecture. It is necessary, therefore, to understand cellular processes within the context of intranuclear microenvironments that mediate the focal assembly of the machinery for transcription, replication and repair and which facilitate the orchestration of these essential processes. Here, we discuss how nuclear anatomy

Gary S. Stein; Sayyed K. Zaidi; Corey D. Braastad; Martin A. Montecino; Andre J. Van Wijnen; Je-Yong Choi; Janet L. Stein; Jane B. Lian; Amjad Javed

2003-01-01

404

Nuclear microenvironments support assembly and organization of the transcriptional regulatory machinery for cell proliferation and differentiation  

Microsoft Academic Search

The temporal and spatial organization of transcriptional regulatory machinery provides microenvironments within the nucleus where threshold concentrations of genes and cognate factors facilitate functional interactions. Conventional biochemical, molecular, and in vivo genetic approaches, together with high throughput genomic and proteomic analysis are rapidly expanding our database of regulatory macromolecules and signaling pathways that are requisite for control of genes that

Gary S. Stein; Jane B. Lian; Andre J. Van Wijnen; Janet L. Stein; Amjad Javed; Martin A. Montecino; Sayyed K. Zaidi; Daniel W. Young; Je-Yong Choi; Soraya E. Gutierrez; Shirwin M. Pockwinse

2004-01-01

405

The dynamic organization of gene-regulatory machinery in nuclear microenvironments  

Microsoft Academic Search

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

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

2005-01-01

406

Combinatorial organization of the transcriptional regulatory machinery in biological control and cancer  

Microsoft Academic Search

The architecturally associated subnuclear organization of nucleic acids and cognate regulatory factors suggests functional interrelationships between nuclear structure and gene expression. Mechanisms that contribute to the spatial distribution of transcription factors within the three dimensional context of nuclear architecture control the sorting and integration of regulatory information as well as the combinatorial assembly, organization and activities of transcriptional machinery at

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

2005-01-01

407

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

408

Elastic network models for understanding biomolecular machinery: from enzymes to supramolecular assemblies  

Microsoft Academic Search

With advances in structure genomics, it is now recognized that knowledge of structure alone is insufficient to understand and control the mechanisms of biomolecular function. Additional information in the form of dynamics is needed. As demonstrated in a large number of studies, the machinery of proteins and their complexes can be understood to a good approximation by adopting Gaussian (or

Chakra Chennubhotla; A. J. Rader; Lee-Wei Yang; Ivet Bahar

2005-01-01

409

Loss rates and time scales for sodium at Mercury  

NASA Astrophysics Data System (ADS)

The time scales and loss rates for sodium in the exosphere of Mercury are studied here. Sodium comes from release processes occurring at the planetary surface; the amount of surface sodium that is available for release (mostly through thermal- or photon-stimulated desorption) is limited. Loss processes deplete the surface concentration of sodium, which is continuously refilled by diffusion from the interior of regolith grains or by chemical sputtering. Ejected sodium particles may either escape the gravity, also aided by the radiation pressure acceleration, or be photoionized, or fall back onto the surface. Falling particles may either stick to the surface or bounce. A Monte Carlo model, simulating all these processes, is used to obtain the exosphere densities, the global loss rates at different true anomaly angles, and typical time scales for small-term variations, taking into account planet's orbit and rotation speed. Assuming an impulsive event, which causes the enhancement of sodium in the exosphere, the model gives the time scales for the exosphere to recover to a steady-state condition. It is found that time scales go from one or two hour (close to perihelion) to half day (close to aphelion). The escape probability ranges from 20% at perihelion and aphelion up to 40% at true anomaly angles of about 60° and 300°.

Mura, Alessandro

2012-04-01

410

Asteroid Rotation Studies  

NASA Astrophysics Data System (ADS)

During winter of 2012-2013, we measured the rotation periods of seven asteroids using the 0.9-m SARA North telescope located at the Kitt Peak National Observatory in Arizona and at the 0.6-m SARA South telescope located at the Cerro Tololo Inter-American Observatory in Chile. The asteroids that we carried out photometry studies include: 1614 Goldschmidt, 1727 Mette, 2207 Antenor, 2616 Lesya, 2972 Niilo, 4387 Tanaka, 34898 (2622 P-L). We will present their rotation periods, and compare with previous results where available.

Han, Xianming L.; Liu, W.; Sun, L.; Gao, S.; Shi, J.; Wang, S.; Pan, X.; Jiang, P.; Zhou, H.; Li, B.; Zhao, H.

2013-06-01

411

Optical Faraday rotation  

NASA Astrophysics Data System (ADS)

Three calculations of optical Faraday rotation are presented in which a linearly polarized field is incident on a medium of harmonic oscillators in the presence of a longitudinal magnetic field. The rotation of the plane of polarization of the field is evaluated using classical oscillators and the Lorentz force equation, quantum oscillators and the Heisenberg equations of motion, and quantum oscillators and a Schrödinger equation approach. It is shown that a simple argument, based on the assumption that a circularly polarized field drives either ?m=1 or ?m=-1 transitions on absorption (m is the magnetic quantum number), leads to an incorrect result for the Verdet constant.

Berman, P. R.

2010-03-01

412

49 CFR 1242.36 - Machinery repair and equipment damaged (accounts XX-26-40 and XX-26-48).  

Code of Federal Regulations, 2012 CFR

...Machinery repair and equipment damaged (accounts XX-26-40 and XX-26-48). 1242...DEPARTMENT OF TRANSPORTATION (CONTINUED) ACCOUNTS, RECORDS AND REPORTS SEPARATION...Machinery repair and equipment damaged (accounts XX-26-40 and XX-26-48)....

2012-10-01

413

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

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Category A machinery spaces: Windows and port lights-T/ALL. 32.56-25 Section 32.56-25 Shipping...32.56-25 Category A machinery spaces: Windows and port lightsâT/ALL. (a) Except as provided in paragraph...

2012-10-01

414

Sodium: Look at the Label  

Center for Food Safety and Applied Nutrition (CFSAN)

... Sodium: Look at the Label. También ... Over 75% of dietary sodium comes from eating packaged and restaurant foods. Most ... More results from www.fda.gov/food/ingredientspackaginglabeling/labelingnutrition

415

Sodium Heat Transfer System Modeling.  

National Technical Information Service (NTIS)

The sodium heat transfer system of the International Energy Agency (IEA) Small Solar Power Systems (SSPS) Central Receiver System (CRS), which includes the heliostat field, receiver, hot and cold storage vessels, and sodium/water steam generator has been ...

A. F. Baker M. E. Fewell

1983-01-01

416

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

417

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 ...

418

ROTATIONAL SPLITTING OF PULSATION MODES  

SciTech Connect

Mode splittings produced by uniform rotation and a particular form of differential rotation are computed for two-dimensional rotating 10 M{sub sun} zero-age main sequence stellar models. The change in the character of the mode splitting is traced as a function of uniform rotation rate, and it is found that only relatively slow rotation rates are required before the mode splitting becomes asymmetric about the azimuthally symmetric (m = 0) mode. Increased rotation produces a progressively altered pattern of the individual modes with respect to each other. Large mode splittings begin to overlap with the mode splittings produced by different radial and latitudinal modes at relatively low rotation rates. The mode-splitting pattern for the differentially rotating stars we model is different than that for uniformly rotating stars, making the mode splitting a possible discriminant of the internal angular momentum distribution if one assumes that the formidable challenge of mode identification can be overcome.

Deupree, Robert G.; Beslin, Wilfried, E-mail: bdeupree@ap.smu.c [Institute for Computational Astrophysics, Department of Astronomy and Physics, Saint Mary's University, Halifax, NS B3H 3C3 (Canada)

2010-10-01

419

Vesta Full Rotation Movie  

NASA Video Gallery

In this movie, strung together from a series of images provided by the framing camera on NASA's Dawn spacecraft, we see a full rotation of Vesta, which occurs over the course of roughly five hours. These images were obtained on July 24, 2011, from a distance of about 3,200 miles (5,200 kilometers).› Asteroid and Comet Watch site › Dawn mission site

Anthony Greicius

2011-07-30

420

Rotator cuff repair  

Microsoft Academic Search

Rotator cuff surgery is developing at a fast pace, with progress in arthroscopic techniques driving much of its advance. Overall, functional outcomes are satisfactory. Tendon healing, however, is inconsistently obtained. Tendon healing correlates with better outcomes, most notably greater strength. Therefore, the best candidates for surgery are patients with lesions that are likely to heal. Factors associated with healing are

Luc Favard; Guillaume Bacle; Julien Berhouet

2007-01-01

421

Rotator cuff problems  

MedlinePLUS

... of demand on the shoulder. You may need surgery to repair the tendon if the rotator cuff has had a complete tear, or if the symptoms persist despite conservative therapy. Most of the time, arthroscopic surgery can be used. Some large tears require open ...

422

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

423

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

424

Spin and rotation  

SciTech Connect

The theoretical aspects of spin-rotation coupling are presented. The approach is based on the general covariance principle. It is shown that the gyrogravitational ratio of the bare spin-1/2 and the spin-1 particles is equal to unity. That is why spin couples with rotation as an ordinary angular momentum. This result is the rigorous substantiation of the cranking model in which spin-rotation coupling is introduced by means of a unitary rotation. To observe the phenomenon, the experiment with hydrogen-like ions in a storage ring is suggested. The degenerated magnetic sub-states of such ion are split if it circulates in a storage ring along a helical trajectory. It is found that the splitting of the 1{sup 2}S{sub 1/2}, F = {sub 1/2} hyperfine state of the {sup 140}Pr{sup 58+} and {sup 142}Pm{sup 60+} ions in the storage ring ESR in Darmstadt is about 4.5 MHz. We argue that such splitting can be experimentally determined by means of the laser-induced quantum beat spectroscopy or the ionic interferometry.

Pavlichenkov, I. M., E-mail: pavi@mbslab.kiae.r [Russian Research Centre 'Kurchatov Institute' (Russian Federation)

2009-07-15

425

Rotating Relativistic Stars  

NASA Astrophysics Data System (ADS)

1. Stationary, axisymmetric equilibria; 2. 3+1 split, action, Lagrangian and Hamiltonian formalisms; 3. Asymptotics, virial identities and nonaxisymmetric equilibria; 4. Numerical schemes; 5. Equilibrium models; 6. Approximation methods; 7. Perturbation theory of relativistic fluids; 8. Quasinormal modes; 9. Stellar stability; 10. Nonlinear dynamics of rotating relativistic stars; Appendix.

Friedman, John L.; Stergioulas, Nikolaos

2013-04-01

426

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

427

Rotational Inertia of Nuclei  

Microsoft Academic Search

A new method to determine dynamic effective moments of inertia at high rotational frequencies is presented. The very large values found at the highest spins (50ℏ-55ℏ) in some Er and Yb nuclei are most likely explained by the alignment of high-j proton orbitals, and could imply triaxial shapes.

M. A. Deleplanque; H. J. Koerner; H. Kluge; A. O. Macchiavelli; N. Bendjaballah; R. M. Diamond; F. S. Stephens

1983-01-01

428

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.

429

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.

430

Rotational inertia of nuclei  

SciTech Connect

A new method to determine dynamic effective moments of inertia at high rotational frequencies is presented. The very large values found at the highest spins (50h--55h) in some Er and Yb nuclei are most likely explained by the alignment of high-j proton orbitals, and could imply triaxial shapes.

Deleplanque, M.A.; Koerner, H.J.; Kluge, H.; Macchiavelli, A.O.; Bendjaballah, N.; Diamond, R.M.; Stephens, F.S.

1983-02-07

431

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

432

Rotator Cuff Exercises  

MedlinePLUS

... rotator cuff--the part that helps with circular motion). These exercises should not cause you pain. If you feel any pain, stop exercising. Start again with a lighter weight. Look at the pictures with each exercise so you can use the ...

433

Rotatable seal assembly  

Microsoft Academic Search

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

Clinton M. Logan; Jack L. Garibaldi

1982-01-01

434

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

435

Decomposition of sodium tetraphenylborate  

SciTech Connect

The chemical decomposition of aqueous alkaline solutions of sodium tetraphenylborate, NaTPB, has been investigated. The focus of the investigation is on the determination of components which influence NaTPB decomposition. Copper(II) ions, solution temperature, and solution pH (hydroxide ion concentration) have all been demonstrated to affect NaTPB stability. Their relationship with each other and the stability of NaTPB has been determined. Based upon this knowledge, a method for stabilizing NaTPB was determined. Decomposition of a NaTPB solution was delayed with the addition of sodium hydroxide. In additional work, the elimination of oxygen from the reaction environment did not prevent NaTPB decomposition in the presence of copper(II) ions but did, however, affect the course of decomposition.

Barnes, M.J.

1990-01-01

436

Decomposition of sodium tetraphenylborate  

SciTech Connect

The chemical decomposition of aqueous alkaline solutions of sodium tetraphenylborate, NaTPB, has been investigated. The focus of the investigation is on the determination of components which influence NaTPB decomposition. Copper(II) ions, solution temperature, and solution pH (hydroxide ion concentration) have all been demonstrated to affect NaTPB stability. Their relationship with each other and the stability of NaTPB has been determined. Based upon this knowledge, a method for stabilizing NaTPB was determined. Decomposition of a NaTPB solution was delayed with the addition of sodium hydroxide. In additional work, the elimination of oxygen from the reaction environment did not prevent NaTPB decomposition in the presence of copper(II) ions but did, however, affect the course of decomposition.

Barnes, M.J.

1990-12-31

437

Rotating, hydromagnetic laboratory experiment modelling planetary cores  

NASA Astrophysics Data System (ADS)

This dissertation describes a series of laboratory experiments motivated by planetary cores and the dynamo effect, the mechanism by which the flow of an electrically conductive fluid can give rise to a spontaneous magnetic field. Our experimental apparatus, meant to be a laboratory model of Earth's core, contains liquid sodium between an inner, solid sphere and an outer, spherical shell. The fluid is driven by the differential rotation of these two boundaries, each of which is connected to a motor. Applying an axial, DC magnetic field, we use a collection of Hall probes to measure the magnetic induction that results from interactions between the applied field and the flowing, conductive fluid. We have observed and identified inertial modes, which are bulk oscillations of the fluid restored by the Coriolis force. Over-reflection at a shear layer is one mechanism capable of exciting such modes, and we have developed predictions of both onset boundaries and mode selection from over-reflection theory which are consistent with our observations. Also, motivated by previous experimental devices that used ferromagnetic boundaries to achieve dynamo action, we have studied the effects of a soft iron (ferromagnetic) inner sphere on our apparatus, again finding inertial waves. We also find that all behaviors are more broadband and generally more nonlinear in the presence of a ferromagnetic boundary. Our results with a soft iron inner sphere have implications for other hydromagnetic experiments with ferromagnetic boundaries, and are appropriate for comparison to numerical simulations as well. From our observations we conclude that inertial modes almost certainly occur in planetary cores and will occur in future rotating experiments. In fact, the predominance of inertial modes in our experiments and in other recent work leads to a new paradigm for rotating turbulence, starkly different from turbulence theories based on assumptions of isotropy and homogeneity, starting instead with inertial modes, which are the linear eigenmodes of any rapidly rotating fluid.

Kelley, Douglas H.

2009-10-01

438

Decontamination of sodium cyanide  

Microsoft Academic Search

Small?scale DecontaminationAqueous sodium cyanide, buffered with ammonium chloride, was decontaminated by portionwise addition of calcium hypochlorite while the temperature of the mixture was held below 12°C.Large?scale DecontaminationThe cyanide waste pH is raised to 10.0 and hypochlorite from any source used to convert cyanide to cyanate or even carbon dioxide and nitrogen if desired.

D. E. Pearson; T. M. Laher; S. Campagna

1981-01-01

439

Equilibrium and dynamic surface tension behavior of aqueous soaps: sodium octanoate and sodium dodecanoate (sodium laurate)  

Microsoft Academic Search

The dynamic surface tension behavior of sodium salts of fatty acids having eight (sodium octanoate) and twelve (sodium laurate) carbon atoms in pure water or in 0.1 N aqueous NaOH has been studied. The primary reason for this study was to obtain fundamental knowledge of the tension behavior of these molecules which are present in several consumer products. Tension data

Karen A. Coltharp; Elias I. Franses

1996-01-01

440

View rotation with parallel ray-rotating windows  

NASA Astrophysics Data System (ADS)

Pairs of planar ray-rotating windows can rotate the view through different angles. The angle by which an object appears rotated is independent of the distance of the object behind the windows. The observer distance has to be chosen such that the observer is in a principal plane of this combination of windows.

Welsh, Stephen S.; Courtial, Johannes

2012-11-01

441

Surfactant turbulent drag reduction in an enclosed rotating disk apparatus  

NASA Astrophysics Data System (ADS)

An enclosed rotating disk apparatus (RDA) with rotational speed up to 5,500 rpm and with temperature control from -5 to 55°C was designed to screen the turbulent drag reducing effectiveness of small samples of newly synthesized drag reducing additives. First, the rotating disk was calibrated with water using both logarithmic and power law models. Then experiments were carried out to measure the frictional torque reduction for a drag reducing aqueous cationic surfactant system (5 mM Ethoquad O12 with 12.5 mM sodium salicylate) over a range of Re. The maximum drag reduction at 30°C was about 47% at Re = 1.90 × 106. For the first time, results with the RDA were compared with those in a circular pipe flow system. They showed similar trends indicating it is a useful screening device for small samples, giving conservative estimates of surfactant effectiveness compared with pipe flow.

Ge, Wu; Zhang, Ying; Zakin, Jacques L.

2007-03-01

442

Experimental study on the vortex flow in a concentric annulus with a rotating inner cylinder  

Microsoft Academic Search

This experimental study concerns the characteristics of vortex flow in a concentric annulus with a diameter ratio of 0.52,\\u000a whose outer cylinder is stationary and inner one is rotating. Pressure losses and skin friction coefficients have been measured\\u000a for fully developed flows of water and of 0.4% aqueous solution of sodium carboxymethyl cellulose (CMC), respectively, when\\u000a the inner cylinder rotates

Young-Ju Kim; Young-Kyu Hwang

2003-01-01

443

Experimental research upon accommodating the functional parameters of a laser controlled system designed for a grading machinery with the actual operating conditions of the grading machinery  

NASA Astrophysics Data System (ADS)

The paper refers to some experimental research activities carried out with a view to accommodate the functional parameters of a laser controlled system with the actual horizontal grading conditions (the slopes in x and y directions of the grading plane are null). Experimental research activities were carried on a device which comprises two electrohydraulic servomechanisms: one mechano-hydraulic servomechanism, which the quota laser sensor is mounted on and simulates the land profile; one electro-hydraulic laser controlled servomechanism, identical with the one on the machinery, which traces the first servomechanism and brings the quota laser sensor back into the optimum reference plane (generated by the rotary laser generator) whenever this one is offset of the laser plane. Experiments were meant to determine: the dynamic of the tracing laser controlled system for various land profiles; the stability and response time of this system; the dynamic of the tracing laser controlled system under simulating external noise comparable with the vibrations generated by the grading machinery.

Popescu, Teodor Costinel; Blejan, Marian; Sov?ial?, Gheorghe

2009-01-01

444

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

445

A call for rotators  

NASA Astrophysics Data System (ADS)

“Needed: highly motivated geoscientists willing to slow the pace of their research for 1-2 years while managing federal government support of their discipline. Assured: change of perspective; no change in pay. Contact your National Science Foundation Program Director for details.—No, this isn't an NSF job announcement; this is an open letter to members of the Earth science community from a recently “retired” NSF rotator concerned by the small number of researchers interested in a Washington tour. I learned firsthand the extent to which an individual in this position is entrusted with decision-making powers, and as a result, I believe that each of us in the research community should feel responsible for ensuring that highly qualified people serve as rotators.

Mountain, Gregory

446

Imbalance rotating machine balancing  

NASA Astrophysics Data System (ADS)

Imbalance analysis is essential in the rotating machine. However, some problems still remain in the aspects of computational efficiency and accuracy. In the present paper, a new method was proposed for estimating the mass imbalance of a rotating shaft by using the vibration signals. This is a new method for the detection of a mass imbalance and its phase position. Based on the signal processing with FFT, an estimator was designed to detect the mass of imbalance. And an improved Lissajous diagram was also introduced with statistical analysis, which make it possible to compute the phase position of the mass imbalance efficiently and arranged at a certain location of the shaft. The proposed method was demonstrated and validated through several test examples.

Su, Hua; Choi, Han-Soo; Chong, Kil T.

2005-12-01

447

Rotating frame zeugmatography.  

PubMed

The proton sensitivity obtainable at 5 MHz from a baby is sufficiently large to suggest the possibility of obtaining images with millimetre solution in seconds. Such goals present difficulties; for example, the high quality factor of the receiving coil necessary for good sensitivity limits the receiver bandwidth and leads to long pulse recovery times, and large, rapidly switched field gradients require power engineering. Solutions to these problems are being pursued at the National Institutes of Health (N.I.H.), where a high speed imaging system is under construction. For example, bandwidth and recovery time problems may be resolved with the aid of a low noise preamplifier with imaginary gain and Miller feedback, large gradients may be generated with a magnet comprising two rotatable hemispherical windings and switching of gradients may be eliminated by performing zeugmatography in the rotating frame. It is upon this latter aspect of the design that the present article concentrates. PMID:6106230

Hoult, D I

1980-06-25

448

Fundamentals of rotating detonations  

NASA Astrophysics Data System (ADS)

A rotating detonation propagating at nearly Chapman-Jouguet velocity is numerically stabilized on a two-dimensional simple chemistry flow model. Under purely axial injection of a combustible mixture from the head end of a toroidal section of coaxial cylinders, the rotating detonation is proven to give no average angular momentum at any cross section, giving an axial flow. The detonation wavelet connected with an oblique shock wave ensuing to the downstream has a feature of unconfined detonation, causing a deficit in its propagation velocity. Due to Kelvin-Helmholtz instability existing on the interface of an injected combustible, unburnt gas pockets are formed to enter the junction between the detonation and oblique shock waves, generating strong explosions propagating to both directions. Calculated specific impulse is as high as 4,700 s.

Hishida, Manabu; Fujiwara, Toshi; Wolanski, Piotr

2009-04-01

449

Variations in earth rotation  

NASA Astrophysics Data System (ADS)

The present conference on variations in the earth's rotation encompasses geophysical effects on earth rotation (ER) parameters, the relationship of ER with tides and oceans, terrestrial and celestial reference systems for measuring ER, refinements of terrestial reference frames, the relationship between length of day and atmospheric angular momentum, and long-term fluctuations of ER parameters. Specific issues addressed include the variational calculation of wobble modes, the long-period elastic behavior of the earth, tidal deceleration of the earth, geophysical implications of the earth's forced nutations, and the study of fluid-solid earth-coupling processes with satellite altimeter data. Also addressed are atmospheric excitation of the ER rate, ER and climatic periodicities, ENSO-related signals in ER, station coordinates and ER parameters, short-period UT1 variations from Iris daily VLBI observations, and the definition and realization of terrestrial reference systems for monitoring ER.

McCarthy, Dennis D.; Carter, William E.

450

Rapidly rotating general relativistic stars. II - Differentially rotating polytropes  

NASA Astrophysics Data System (ADS)

A previous numerical method (Komatsu, 1989) has been applied to the study of general relativistic differentially rotating bodies, including ring-like structures. Nine sequences for polytropic index (N) = 1/2 polytropes and 10 sequences for N = 3/2 polytropes have been computed for various values of the rotation parameter and the strength of gravity. For both general-relativistic and weak-Newtonian gravities, models have been obtained for the limiting cases of nearly rigid rotation and strongly differential rotation. It is found that the increase in the gravitational mass by rotation is considerably suppressed in the strong-gravity limit.

Komatsu, Hidemi; Eriguchi, Yoshiharu; Hachisu, Izumi

1989-07-01

451

Polytropic, differentially rotating cylinders  

NASA Astrophysics Data System (ADS)

Infinite cylinders composed of polytropic material can possess nearly arbitrary rotation fields while retaining the fundamental simplicity of one-dimensional structures. The physical properties of these objects can be easily calculated and understood by junior-senior level physics students even without access to a large computing facility. Analytical results are presented here for polytropic index 0 and 1 as well as numerical results for polytropic index 1.5.

Simon, Sheridan A.; Czysz, Michael F.; Everett, Karen; Field, Christopher

1981-07-01

452

Rotating elephant trunks  

NASA Astrophysics Data System (ADS)

Aims.We investigate the structure and velocity of cold molecular pillars, "elephant trunks", in expanding H II regions. Methods: .The trunks are seen in silhouette against the bright background in our H? images. All trunks are filamentary, and show signs of being twisted. Four such trunks in NGC 7822, IC 1805, the Rosette Nebula, and DWB 44 were selected, and then mapped mainly in 12CO and 13CO. We determine the mass and density of the trunks. Most of the mass is concentrated in a head facing the central cluster, and in sub-filaments forming the body of the trunk that is connected to V-shaped filaments to the outer expanding shell. Results: .We discovered that all four trunks rotate as rigid bodies (to a first approximation) about their major axes, and that at least two trunks are stretching along their major axes, meaning that the massive heads are lagging behind in the general expansion of the H II regions. The rotational periods are of the order of a few million years - similar to the age of the clusters. Rotation, then, is responsible for the twisted appearance of many elephant trunks, since they are rooted in the outer shells. The trunks carry surprisingly large amounts of angular momentum, 3× 1048{-}2× 1050 kg m2 s-1, with corresponding rotational energies of up to 1037 J. However, we estimate the total magnetic energies to be even larger. The trunks continuously reshape, and the formation of twined, and in many cases helical, sub-filaments can be understood as a consequence of electromagnetic and inertia forces inside the trunks. A theory based on the concept of magnetically twisted trunks is developed further, where the initial angular momentum is a consequence of the twisting of parent filaments containing mass condensations. Our results also suggest a new process of removing angular momentum from parent molecular clouds.

Gahm, G. F.; Carlqvist, P.; Johansson, L. E. B.; Nikoli?, S.

2006-07-01

453

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

454

Partial Rotator Cuff Ruptures  

Microsoft Academic Search

\\u000a Partial rotator cuff ruptures are not rare and occur mainly in the supraspinatus tendon and may extend to that of infraspinatus,\\u000a but rarely to the tendon of subscapularis. Isolated lesions in the tendons of infraspinatus, teres minor or subscapularis\\u000a are rare. Partial ruptures usually occur before the sixth decade of life and can be a cause of unexplained pain in

Antonio Cartucho

455

Rotating plug bearing and seal  

DOEpatents

A bearing and seal structure for nuclear reactors utilizing rotating plugs above the nuclear reactor vessel. The structure permits lubrication of bearings and seals of the rotating plugs without risk of the lubricant draining into the reactor vessel below. The structure permits lubrication by utilizing a rotating outer race bearing.

Wade, Elman E. (Ruffs Dale, PA)

1977-01-01

456

Rotating black hole hair  

NASA Astrophysics Data System (ADS)

A Kerr black hole sporting cosmic string hair is studied in the context of the abelian Higgs model vortex. It is shown that such a system displays much richer phenomenology than its static Schwarzschild or Reissner-Nordstrom cousins, for example, the rotation generates a near horizon `electric' field. In the case of an extremal rotating black hole, two phases of the Higgs hair are possible: large black holes exhibit standard hair, with the vortex piercing the event horizon. Small black holes on the other hand, exhibit a flux-expelled solution, with the gauge and scalar field remaining identically in their false vacuum state on the event horizon. This solution however is extremely sensitive to confirm numerically, and we conjecture that it is unstable due to a supperradiant mechanism similar to the Kerr-adS instability. Finally, we compute the gravitational back reaction of the vortex, which turns out to be far more nuanced than a simple conical deficit. While the string produces a conical effect, it is conical with respect to a local co-rotating frame, not with respect to the static frame at infinity.

Gregory, Ruth; Kubiz?ák, David; Wills, Danielle

2013-06-01

457

The rotation of Mimas  

NASA Astrophysics Data System (ADS)

Context. The Cassini mission in the Saturnian system is an outstanding opportunity to improve our knowledge of the satellites of Saturn. The data obtained thanks to this mission must be balanced with theoretical models. Aims: This paper aims at modelling the rotation of Mimas with respect to its possible internal structure. Methods: We first built different interior models, considering Mimas to be composed of two rigid layers with different porosity. Then we simulated the rotational behaviour of these models in a three-degree of freedom numerical code, considering the complete ephemerides of a Mimas whose rotation is disturbed by Saturn. We also estimated the deviation of its longitudinal orientation caused by tides. Results: We expect a signature of the internal structure up to 0.53° in the longitudinal librations and an obliquity between 2 and 3 arcmin, the exact values depend on the interior. Conclusions: The longitudinal librations should be detectable, but inverting them to arrive at clues on the internal structure of Mimas is challenging.

Noyelles, B.; Karatekin, Ö.; Rambaux, N.

2011-12-01

458

Snakes and spin rotators  

SciTech Connect

The generalized snake configuration offers advantages of either shorter total snake length and smaller orbit displacement in the compact configuration or the multi-functions in the split configuration. We found that the compact configuration can save about 10% of the total length of a snake. On other hand, the spilt snake configuration can be used both as a snake and as a spin rotator for the helicity state. Using the orbit compensation dipoles, the spilt snake configuration can be located at any distance on both sides of the interaction point of a collider provided that there is no net dipole rotation between two halves of the snake. The generalized configuration is then applied to the partial snake excitation. Simple formula have been obtained to understand the behavior of the partial snake. Similar principle can also be applied to the spin rotators. We also estimate the possible snake imperfections are due to various construction errors of the dipole magnets. Accuracy of field error of better than 10{sup {minus}4} will be significant. 2 refs., 5 figs.

Lee, S.Y.

1990-06-18

459

Rotating cylindrical wormholes  

NASA Astrophysics Data System (ADS)

We consider stationary, cylindrically symmetric configurations in general relativity and formulate necessary conditions for the existence of rotating cylindrical wormholes. It is shown that in a comoving reference frame, the rotational part of the gravitational field is separated from its static part and forms an effective stress-energy tensor with exotic properties, which favors the existence of wormhole throats. Exact vacuum and scalar-vacuum solutions (with a massless scalar) are considered as examples, and it turns out that even vacuum solutions can be of wormhole nature. However, solutions obtainable in this manner cannot have well-behaved asymptotic regions, which excludes the existence of wormhole entrances appearing as local objects in our Universe. To overcome this difficulty, we try to build configurations with flat asymptotic regions by the cut-and-paste procedure: on both sides of the throat, a wormhole solution is matched to a properly chosen region of flat space at surfaces ?- and ?+. It is shown, however, that if we describe the throat region with vacuum or scalar-vacuum solutions, one or both thin shells appearing on ?- and ?+ inevitably violate the null energy condition. In other words, although rotating wormhole solutions are easily found without exotic matter, such matter is still necessary for obtaining asymptotic flatness.

Bronnikov, Kirill A.; Krechet, Vladimir G.; Lemos, José P. S.

2013-04-01

460

Origins of the protein synthesis machinery: a genomics and structural perspective  

NASA Astrophysics Data System (ADS)

The protein synthesis machinery is believed to have largely evolved before the last common ancestor of life on Earth as we know it. Thus, an understanding of ribosomal history will provide insight to the transition period between the last common ancestor and the RNA World. It is argued here that much of this history has been preserved in the primary sequences and three-dimensional structures of the various ribosomal components. In order to understand this history, it is necessary to identify timing insights that can provide clues to the relative age of various aspects of the ribosomal machinery. Such information can be obtained in a variety of ways. Several examples of how such information might be obtained are discussed. Finally, a tentative outline of the order of major events in ribosome history is presented.

Fox, George E.; Hury, James; Nagaswamy, Uma; Wang, Jiachen; Naik, Ashwinikumar K.

2003-02-01

461

The Replication Fork: Understanding the Eukaryotic Replication Machinery and the Challenges to Genome Duplication  

PubMed Central

Eukaryotic cells must accurately and efficiently duplicate their genomes during each round of the cell cycle. Multiple linear chromosomes, an abundance of regulatory elements, and chromosome packaging are all challenges that the eukaryotic DNA replication machinery must successfully overcome. The replication machinery, the “replisome” complex, is composed of many specialized proteins with functions in supporting replication by DNA polymerases. Efficient replisome progression relies on tight coordination between the various factors of the replisome. Further, replisome progression must occur on less than ideal templates at various genomic loci. Here, we describe the functions of the major replisome components, as well as some of the obstacles to efficient DNA replication that the replisome confronts. Together, this review summarizes current understanding of the vastly complicated task of replicating eukaryotic DNA.

Leman, Adam R.; Noguchi, Eishi

2013-01-01

462

Recruitment of the autophagic machinery to endosomes during infection is mediated by ubiquitin.  

PubMed

Although ubiquitin is thought to be important for the autophagic sequestration of invading bacteria (also called xenophagy), its precise role remains largely enigmatic. Here we determined how ubiquitin is involved in this process. After invasion, ubiquitin is conjugated to host cellular proteins in endosomes that contain Salmonella or transfection reagent-coated latex (polystyrene) beads, which mimic invading bacteria. Ubiquitin is recognized by the autophagic machinery independently of the LC3-ubiquitin interaction through adaptor proteins, including a direct interaction between ubiquitin and Atg16L1. To ensure that invading pathogens are captured and degraded, Atg16L1 targeting is secured by two backup systems that anchor Atg16L1 to ubiquitin-decorated endosomes. Thus, we reveal that ubiquitin is a pivotal molecule that connects bacteria-containing endosomes with the autophagic machinery upstream of LC3. PMID:24100292

Fujita, Naonobu; Morita, Eiji; Itoh, Takashi; Tanaka, Atsushi; Nakaoka, Megumi; Osada, Yuki; Umemoto, Tetsuo; Saitoh, Tatsuya; Nakatogawa, Hitoshi; Kobayashi, Shouhei; Haraguchi, Tokuko; Guan, Jun-Lin; Iwai, Kazuhiro; Tokunaga, Fuminori; Saito, Kazunobu; Ishibashi, Koutaro; Akira, Shizuo; Fukuda, Mitsunori; Noda, Takeshi; Yoshimori, Tamotsu

2013-10-07

463

Integrin Signaling Switches the Cytoskeletal and Exocytic Machinery that Drives Neuritogenesis  

PubMed Central

Neurons establish their unique morphology by elaborating multiple neurites that subsequently form axons and dendrites. Neurite initiation entails significant surface area expansion, necessitating addition to the plasma membrane. We report that regulated membrane delivery coordinated with the actin cytoskeleton is crucial for neuritogenesis, and identify two independent pathways that use distinct exocytic and cytoskeletal machinery to drive neuritogenesis. One pathway employs Ena/VASP-regulated actin dynamics coordinated with VAMP2-mediated exocytosis, and involves a novel role for Ena/VASP in exocytosis. A second mechanism occurs in the presence of laminin through integrin-dependent activation of FAK and src, and utilizes coordinated activity of the Arp2/3 complex and VAMP7-mediated exocytosis. We conclude that neuritogenesis can be driven by two distinct pathways that differentially coordinate cytoskeletal dynamics and exocytosis. These regulated changes and coordination of cytoskeletal and exocytic machinery may be utilized in other physiological contexts involving cell motility and morphogenesis.

Gupton, Stephanie L.; Gertler, Frank B.

2012-01-01

464

Identification of a new fatty acid synthesis-transport machinery at the peroxisomal membrane.  

PubMed

The neurodegenerative disease X-linked adrenoleukodystrophy (X-ALD) is characterized by the abnormal accumulation of very long chain fatty acids. Mutations in the gene encoding the peroxisomal ATP-binding cassette half-transporter, adrenoleukodystrophy protein (ALDP), are the primary cause of X-ALD. To gain a better understanding of ALDP dysfunction, we searched for interaction partners of ALDP and identified binary interactions to proteins with functions in fatty acid synthesis (ACLY, FASN, and ACC) and activation (FATP4), constituting a thus far unknown fatty acid synthesis-transport machinery at the cytoplasmic side of the peroxisomal membrane. This machinery adds to the knowledge of the complex mechanisms of peroxisomal fatty acid metabolism at a molecular level and elucidates potential epigenetic mechanisms as regulatory processes in the pathogenesis and thus the clinical course of X-ALD. PMID:22045812

Hillebrand, Merle; Gersting, Søren W; Lotz-Havla, Amelie S; Schäfer, Annika; Rosewich, Hendrik; Valerius, Oliver; Muntau, Ania C; Gärtner, Jutta

2011-11-01

465

Identification of distinct thiopeptide-antibiotic precursor lead compounds using translation machinery assays  

PubMed Central

SUMMARY Most thiopeptide antibiotics target the translational machinery: Thiostrepton (ThS) and nosiheptide (NoS) target the ribosome and inhibit translation factor function, whereas GE2270A/T binds to the elongation factor EF-Tu and prevents ternary complex formation. We have utilized several in vitro translational machinery assays to screen a library of thiopeptide antibiotic precursor compounds and identified four families of precursor compounds that are either themselves inhibitory or are able to relieve the inhibitory effects of ThS, NoS, or GE2270T. Some of these precursors represent distinct compounds with respect to their ability to bind to ribosomes. The results provide not only insight into the mechanism of action of thiopeptide compounds, but also demonstrate the potential of such assays for identifying lead compounds that might be missed using conventional inhibitory screening protocols.

Starosta, Agata L.; Qin, Haiou; Mikolajka, Aleksandra; Leung, Gulice Y. C.; Schwinghammer, Kathrin; Chen, David Y.-K.; Cooperman, Barry S.; Wilson, Daniel N.

2011-01-01

466

Intracellular sodium activity and sodium transport in Necturus gallbladder epithelium  

Microsoft Academic Search

Summary Ion-sensitive glass microelectrodes, conventional microelectrodes and isotope flux measurements were employed inNecturus gallbladder epithelium to study intracellular sodium activity, [Na]i, electrical parameters of epithelial cells, and properties of active sodium transport. Mean control values were: [Na]i: 9.2 to 12.1mm; transepithelial potential difference,?ms: ?1.5 mV (lumen negative); basolateral cell membrane potential,?es: ?62 mV (cell interior negative); sodium conductance of the

J. Graf; G. Giebisch

1979-01-01

467

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

468

Status of efforts by oil mill machinery manufacturers to control fugitive dust emissions  

Microsoft Academic Search

Machinery manufacturers who serve the cottonseed crushing industry are fully aware of the existing fugitive dust problems.\\u000a The main problem lies in the unique characteristic of cottonseed as being a non-free-flowing material until after lint removal.\\u000a This characteristic is compounded by varying degrees of moisture. Therefore, a totally enclosed cottonseed cleaner in a dust-tight\\u000a shroud is not practical due to

R. B. Sanders

1982-01-01

469

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

470

Midbody Targeting of the ESCRT Machinery by a Noncanonical Coiled Coil in CEP55  

Microsoft Academic Search

The ESCRT (endosomal sorting complex required for transport) machinery is required for the scission of membrane necks in processes including the budding of HIV-1 and cytokinesis. An essential step in cytokinesis is recruitment of the ESCRT-I complex and the ESCRT-associated protein ALIX to the midbody (the structure that tethers two daughter cells) by the protein CEP55. Biochemical experiments show that

Hyung Ho Lee; Natalie Elia; Rodolfo Ghirlando; Jennifer Lippincott-Schwartz; James H. Hurley

2008-01-01

471

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

472

Mapping of the protein import machinery in the mitochondrial outer membrane by crosslinking of translocation intermediates  

Microsoft Academic Search

MITOCHONDRIA contain a complex machinery for the import of nuclear-encoded proteins1,2. Receptor proteins exposed on the outer membrane surface are required for the specific binding of precursor proteins to mitochondria, either by binding of cytosolic signal recognition factors or by direct recognition of the precursor polypeptides1-5. Subsequently, the precursors are inserted into the outer membrane at the general insertion site

Thomas Söllner; Joachim Rassow; Martin Wiedmann; Jens Schlossmann; Petra Keil; Walter Neupert; Nikolaus Pfanner

1992-01-01

473

Equine Infectious Anemia Virus Utilizes Host Vesicular Protein Sorting Machinery during Particle Release  

Microsoft Academic Search

A final step in retrovirus assembly, particle release from the cell, is modulated by a small motif in the Gag protein known as a late domain. Recently, human immunodeficiency virus type 1 (HIV-1) and Moloney murine leukemia virus (M-MuLV) were shown to require components of the cellular vacuolar protein sorting (VPS) machinery for efficient viral release. HIV-1 interacts with the

Giancarlo O. Tanzi; Andrew J. Piefer; Paul Bates

2003-01-01

474

Heterochromatic Silencing and HP1 Localization in Drosophila Are Dependent on the RNAi Machinery  

Microsoft Academic Search

Genes normally resident in euchromatic domains are silenced when packaged into heterochromatin, as exemplified in Drosophila melanogaster by position effect variegation (PEV). Loss-of-function mutations resulting in suppression of PEV have identified critical components of heterochromatin, including proteins HP1, HP2, and histone H3 lysine 9 methyltransferase. Here, we demonstrate that this silencing is dependent on the RNA interference machinery, using tandem

Manika Pal-Bhadra; Boris A. Leibovitch; Sumit G. Gandhi; Madhusudana Rao; Utpal Bhadra; James A. Birchler; Sarah C. R. Elgin

2004-01-01

475

Cyclin E Associates with Components of the Pre-mRNA Splicing Machinery in Mammalian Cells  

Microsoft Academic Search

Cyclin E-cdk2 is a critical regulator of cell cycle progression from G1 into S phase in mammalian cells. Despite this important function little is known about the downstream targets of this cyclin-kinase complex. Here we have identified components of the pre-mRNA processing machinery as potential targets of cyclin E-cdk2. Cyclin E-specific antibodies coprecipitated a number of cyclin E-associated proteins from

WOLFGANG SEGHEZZI; KATRIN CHUA; FRANCES SHANAHAN; ROBIN REED; EMMA LEES

1998-01-01

476

Composition and conservation of the mRNA-degrading machinery in bacteria  

Microsoft Academic Search

RNA synthesis and decay counteract each other and therefore inversely regulate gene expression in pro- and eukaryotic cells\\u000a by controlling the steady-state level of individual transcripts. Genetic and biochemical data together with recent in depth\\u000a annotation of bacterial genomes indicate that many components of the bacterial RNA decay machinery are evolutionarily conserved\\u000a and that their functional analogues exist in organisms

Vladimir R Kaberdin; Dharam Singh; Sue Lin-Chao

2011-01-01

477

Causes and effects of escalating prices for deep-mine machinery. [1950 to 1981  

Microsoft Academic Search

This report examines the issue of escalating deep-coal-mine machinery prices in the 1970s. Producer price trends, mining investment costs, mine asset values, and discussions with used-equipment brokers all indicated that deep-mining-equipment prices escalated faster than miner wages and general prices during the 1970s. Causes of this price escalation include increased demand for mining equipment, regulation, general price inflation, and overcapitalization.

1983-01-01

478

Pink1 regulates mitochondrial dynamics through interaction with the fission\\/fusion machinery  

Microsoft Academic Search

Mitochondria form dynamic tubular networks that undergo frequent morphological changes through fission and fusion, the imbalance of which can affect cell survival in general and impact synaptic transmission and plasticity in neurons in particular. Some core components of the mitochondrial fission\\/fusion machinery, including the dynamin-like GTPases Drp1, Mitofusin, Opa1, and the Drp1-interacting protein Fis1, have been identified. How the fission

Yufeng Yang; Yingshi Ouyang; Lichuan Yang; M. Flint Beal; Angus McQuibban; Hannes Vogel; Bingwei Lu

2008-01-01

479

Cavitation and gas-liquid flow in fluid machinery and devices. FED-Volume 190  

Microsoft Academic Search

Cavitation and gas-liquid two-phase flow have remained important areas in many industrial applications and constantly provided challenges for academic researchers and industrial practitioners alike. Cavitation and two-phase flow commonly occur in fluid machinery such as pumps, propellers, and fluid devices such as orifices, valves, and diffusers. Cavitation not only degrades the performance of these machines and devices but deteriorates the

J. H. Kim; W. B. Morgan; O. Furuya

1994-01-01

480

PBP1 Is a Component of the Bacillus subtilis Cell Division Machinery  

PubMed Central

Bacillus subtilis penicillin-binding protein PBP1 has been implicated in cell division. We show here that a PBP1 knockout strain is affected in the formation of the asymmetric sporulation septum and that green fluorescent protein-PBP1 localizes to the sporulation septum. Localization of PBP1 to the vegetative septum is dependent on various cell division proteins. This study proves that PBP1 forms part of the B. subtilis cell division machinery.

Scheffers, Dirk-Jan; Errington, Jeffery

2004-01-01

481

PBP1 is a component of the Bacillus subtilis cell division machinery.  

PubMed

Bacillus subtilis penicillin-binding protein PBP1 has been implicated in cell division. We show here that a PBP1 knockout strain is affected in the formation of the asymmetric sporulation septum and that green fluorescent protein-PBP1 localizes to the sporulation septum. Localization of PBP1 to the vegetative septum is dependent on various cell division proteins. This study proves that PBP1 forms part of the B. subtilis cell division machinery. PMID:15262952

Scheffers, Dirk-Jan; Errington, Jeffery

2004-08-01

482

Novel rechargeable sodium batteries  

Microsoft Academic Search

The program was concerned with the development of a high energy density rechargeable sodium battery operating in the moderate temperature range of 175 to 200 C. The suitability of NaFeOâ and FeOCl as cathode materials in Na cells having the configuration--Molten Na\\/beta-AlâOâ\\/Molten NaAlC{sub l4}, NaFeOâ or FeOC{sub l}--has been studied. Cells containing either NaFeOâ or FeOCl were found to cycle

1988-01-01

483

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.

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

2011-01-01

484

Protein-Protein Interaction Network and Subcellular Localization of the Arabidopsis Thaliana ESCRT Machinery  

PubMed Central

The endosomal sorting complex required for transport (ESCRT) consists of several multi-protein subcomplexes which assemble sequentially at the endosomal surface and function in multivesicular body (MVB) biogenesis. While ESCRT has been relatively well characterized in yeasts and mammals, comparably little is known about ESCRT in plants. Here we explored the yeast two-hybrid protein interaction network and subcellular localization of the Arabidopsis thaliana ESCRT machinery. We show that the Arabidopsis ESCRT interactome possesses a number of protein–protein interactions that are either conserved in yeasts and mammals or distinct to plants. We show also that most of the Arabidopsis ESCRT proteins examined at least partially localize to MVBs in plant cells when ectopically expressed on their own or co-expressed with other interacting ESCRT proteins, and some also induce abnormal MVB phenotypes, consistent with their proposed functional role(s) as part of the ESCRT machinery in Arabidopsis. Overall, our results help define the plant ESCRT machinery by highlighting both conserved and unique features when compared to ESCRT in other evolutionarily diverse organisms, providing a foundation for further exploration of ESCRT in plants.

Richardson, Lynn G. L.; Howard, Alexander S. M.; Khuu, Nicholas; Gidda, Satinder K.; McCartney, Andrew; Morphy, Brett J.; Mullen, Robert T.

2011-01-01

485

Roles of repressive epigenetic machinery in lineage decision of T cells.  

PubMed

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

2013-06-01

486

Functional interplay between a virus and the ESCRT machinery in archaea.  

PubMed

Recently it has been discovered that a number of eukaryotic viruses, including HIV, coopt the cellular Endosomal Sorting Complex Required for Transport (ESCRT) machinery to affect egress from infected cells. Strikingly, the ESCRT apparatus is conserved in a subset of Archaea, including members of the genus Sulfolobus where it plays a role in cytokinesis. In the current work, we reveal that the archaeal virus Sulfolobus turreted icosahedral virus isolated from Yellowstone National Park's acidic hot springs also exploits the host ESCRT machinery in its replication cycle. Moreover, perturbation of normal ESCRT function abrogates viral replication and, thus, prevents establishment of a productive Sulfolobus turreted icosahedral virus infection. We propose that the Sulfolobus ESCRT machinery is involved in viral assembly within the cytoplasm and in escape from the infected cell by using a unique lysis mechanism. Our results support an ancient origin for viruses "hijacking" ESCRT proteins to complete their replication cycle and thus identify a critical host-virus interaction conserved between two domains of life. PMID:23754419

Snyder, Jamie C; Samson, Rachel Y; Brumfield, Susan K; Bell, Stephen D; Young, Mark J

2013-06-10

487

Mammalian transcription factor A is a core component of the mitochondrial transcription machinery  

PubMed Central

Transcription factor A (TFAM) functions as a DNA packaging factor in mammalian mitochondria. TFAM also binds sequence-specifically to sites immediately upstream of mitochondrial promoters, but there are conflicting data regarding its role as a core component of the mitochondrial transcription machinery. We here demonstrate that TFAM is required for transcription in mitochondrial extracts as well as in a reconstituted in vitro transcription system. The absolute requirement of TFAM can be relaxed by conditions that allow DNA breathing, i.e., low salt concentrations or negatively supercoiled DNA templates. The situation is thus very similar to that described in nuclear RNA polymerase II-dependent transcription, in which the free energy of supercoiling can circumvent the need for a subset of basal transcription factors at specific promoters. In agreement with these observations, we demonstrate that TFAM has the capacity to induce negative supercoils in DNA, and, using the recently developed nucleobase analog FRET-pair tCO–tCnitro, we find that TFAM distorts significantly the DNA structure. Our findings differ from recent observations reporting that TFAM is not a core component of the mitochondrial transcription machinery. Instead, our findings support a model in which TFAM is absolutely required to recruit the transcription machinery during initiation of transcription.

Shi, Yonghong; Dierckx, Anke; Wanrooij, Paulina H.; Wanrooij, Sjoerd; Larsson, Nils-Goran; Wilhelmsson, L. Marcus; Falkenberg, Maria; Gustafsson, Claes M.

2012-01-01

488

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.

Couturier, Jeremy; Touraine, Brigitte; Briat, Jean-Francois; Gaymard, Frederic; Rouhier, Nicolas

2013-01-01

489

Rotational properties of planetary satellites  

NASA Astrophysics Data System (ADS)

Properties of satellite rotation that are observable in principle, include the rotation period, the orientation of the spin axis relative to the orbit plane, precession of the spin axis due to gravitational torques, nonprincipal axis rotation or wobble, and deviations from uniform principle axis rotation or libration. Considerable order is observed in current satellite rotation states, and it is of interest to ascertain how this order came about and why some satellites do not conform to the dominant norm. There is a strong coupling between the spin and orbital motions that is primarily responsible for maintaining the ordered rotation states in most cases, but this coupling is equally responsible for destroying any chance of orderly rotation for Saturn's satellite Hyperion. Understanding the processes which constrain current rotation states as well as those of an evolutionary nature which could have brought the individual satellites to their observed rotation and orbit states allows us to sometimes infer interior properties of some satellite or even of its primary planet, although, attempts to deduce primordial rotation states are usually frustrated. The observed rotational properties of the planetary satellites are summarized, and the understanding of the processes maintaining and those leading to the observed states are outlined. Some of the inferences that can be drawn about intrinsic properties of the bodies themselves are indicated.

Peale, S. J.

1991-06-01

490

Sodium bicarbonate in chemical flooding: Part 1: Topical report. [Sodium bicarbonate and sodium carbonate  

SciTech Connect

To compare oil recovery and alkali consumption in alkaline flooding using sodium bicarbonate with other alkaline agents, coreflooding experiments were performed in turn with viscosified sodium bicarbonate and viscosified sodium carbonate solutions. Oil recovery was monitored, and the effluent brine from these corefloods was analyzed for silicon, aluminum, pH, and total inorganic carbon. The results indicate that viscosified sodium bicarbonate recovered more of the asphaltic Cerro-Negro crude than of the less asphaltic Wilmington crude oil. The recovery efficiency using the viscosified sodium carbonate was similar for the two crudes. For both crudes, the percent oil recovery using viscosified sodium carbonate was slightly higher than that using the viscosified sodium bicarbonate. Mineral dissolution and decrease in pH were found to be greater in corefloods using viscosified sodium carbonate. Total inorganic carbon recovery can be obtained in corefloods with either agent, provided that a sufficient water drive follows the chemical slug. Long-term experiments were performed by recirculating alkaline solutions through oil-free, unfired Berea sandstone to monitor the rock/alkali interactions. The experimental results indicate an eight-fold decrease in quartz dissolution by sodium bicarbonate compared with sodium carbonate. Moderate magnesium solubility was observed at the pH of the bicarbonate solution. Low solubility of magnesium and aluminum at the pH of the carbonate indicates the possible formation of precipitates. In these experiments 13% of the carbonate was converted to bicarbonate. Total alkalinity was not significantly decreased with either agent. 18 refs., 5 tabs.

Peru, D.A.; Lorenz, P.B.

1987-07-01

491

Vacuum pyrolysis of sodium stearate  

Microsoft Academic Search

Vacuum pyrolysis of sodium stearate was studied to provide useful information for Green River oil shale pyrolysis. Sodium stearate is a typical compound of carboxylic acid salts amounting to 3.6% of total organic materials in the oil shale by methanol extraction. Sodium stearate contained in a stainless steel miniature reactor was heated at 450°C in a fluidized sand bath. Pyrolysis

Chong

1985-01-01

492

Sodium channelopathies and pain.  

PubMed

Chronic pain often represents a severe, debilitating condition. Up to 10% of the worldwide population are affected, and many patients are poorly responsive to current treatment strategies. Nociceptors detect noxious conditions to produce the sensation of pain, and this signal is conveyed to the CNS by means of action potentials. The fast upstroke of action potentials is mediated by voltage-gated sodium channels, of which nine pore-forming alpha-subunits (Nav1.1-1.9) have been identified. Heterogeneous functional properties and distinct expression patterns denote specialized functions of each subunit. The Nav1.7 and Nav1.8 subunits have emerged as key molecules involved in peripheral pain processing and in the development of an increased pain sensitivity associated with inflammation and tissue injury. Several mutations in the SCN9A gene encoding for Nav1.7 have been identified as important cellular substrates for different heritable pain syndromes. This review aims to cover recent progress on our understanding of how biophysical properties of mutant Nav1.7 translate into an aberrant electrogenesis of nociceptors. We also recapitulate the role of Nav1.8 for peripheral pain processing and of additional sodium channelopathies which have been linked to disorders with pain as a significant component. PMID:20101409

Lampert, Angelika; O'Reilly, Andrias O; Reeh, Peter; Leffler, Andreas

2010-01-26

493

Shipboard/Shoreside Computer Information and Management System. M.V. Sugar Islander. Phase II. Preventive Maintenance and Machinery History.  

National Technical Information Service (NTIS)

This is a final report on the design, development and implementation of Phase II of a two-phase integrated shipboard/shoreside computer management information system. Phase II concerns Preventive Maintenance and Machinery History operating on shipboard/sh...

P. F. Johnson L. A. Marciello R. R. Tremayne W. R. Taylor D. Z. Korkut

1984-01-01

494

Industry Sector Analysis: Agricultural Machinery, Equipment, Irrigation, Fertilizers (Chile, Colombia, Dominican Republic, Ecuador, Guatemala, Honduras, Panama, Peru) Country Packages.  

National Technical Information Service (NTIS)

The Industry Sector Analyses (I.S.A.) for agricultural machinery, equipment, irrigation and fertilizers, contains statistical and narrative information on projected market demand, end-users, receptivity of Mexican consumers to U.S. products, the competiti...

1991-01-01

495

Sample rotating turntable kit for infrared spectrometers  

DOEpatents

An infrared spectrometer sample rotating turntable kit has a rotatable sample cup containing the sample. The infrared spectrometer has an infrared spectrometer probe for analyzing the sample and the rotatable sample cup is adapted to receive the infrared spectrometer probe. A reflectance standard is located in the rotatable sample cup. A sleeve is positioned proximate the sample cup and adapted to receive the probe. A rotator rotates the rotatable sample cup. A battery is connected to the rotator.

Eckels, Joel Del (Livermore, CA); Klunder, Gregory L. (Oakland, CA)

2008-03-04

496

The Earth's Rotation  

NSDL National Science Digital Library

This resource presents four topics and nine activities related to the Earth's rotation. This chapter looks first at the phenomenon of shadows (how they are made), then uses measurements of shadows to track the motion of the sun across the sky. The activities challenge students to quantify their observations, and in so doing, learn useful measuring and organizational techniques. This is a chapter in the online book called Eyes on the Sky, Feet on the Ground, an exploration into astronomy as a classroom tool for learning how to theorize, experiment, and analyze data. The activities are fully illustrated and contain detailed, step-by-step instructions as well as suggested discussion topics.

497

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...

498

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

499

Final report on the safety assessment of Sodium Metaphosphate, Sodium Trimetaphosphate, and Sodium Hexametaphosphate.  

PubMed

These inorganic polyphosphate salts all function as chelating agents in cosmetic formulations. In addition, Sodium Metaphosphate functions as an oral care agent, Sodium Trimetaphosphate as a buffering agent, and Sodium Hexametaphosphate as a corrosion inhibitor. Only Sodium Hexametaphosphate is currently reported to be used. Although the typical concentrations historically have been less than 1%, higher concentrations have been used in products such as bath oils, which are diluted during normal use. Sodium Metaphosphate is the general term for any polyphosphate salt with four or more phosphate units. The four-phosphate unit version is cyclic, others are straight chains. The hexametaphosphate is the specific six-chain length form. The trimetaphosphate structure is cyclic. Rats fed 10% Sodium Trimetaphosphate for a month exhibited transient tubular necrosis; rats given 10% Sodium Metaphosphate had retarded growth and those fed 10% Sodium Hexametaphosphate had pale and swollen kidneys. In chronic studies using animals, growth inhibition, increased kidney weights (with calcium deposition and desquamation), bone decalcification, parathyroid hypertrophy and hyperplasia, inorganic phosphaturia, hepatic focal necrosis, and muscle fiber size alterations. Sodium Hexametaphosphate was a severe skin irritant in rabbits, whereas a 0.2% solution was only mildly irritating. A similar pattern was seen with ocular toxicity. These ingredients were not genotoxic in bacterial systems nor were they carcinogenic in rats. No reproductive or developmental toxicity was seen in studies using rats exposed to Sodium Hexametaphosphate or Sodium Trimetaphosphate. In clinical testing, irritation is seen as a function of concentration; concentrations as high as 1% produced no irritation in contact allergy patients. Because of the corrosive nature of Sodium Hexametaphosphate, it was concluded that these ingredients could be used safely if each formulation was prepared to avoid skin irritation; for example, low concentration in a leave-on product or dilution of a higher concentration as part of product usage. PMID:11766135

Lanigan, R S

2001-01-01

500

Sodium removal and sodium concentration during peritoneal dialysis: effects of three methods of sodium measurement  

Microsoft Academic Search

Background. Sodium removal (NaR) may have a major impact on the survival of peritoneal dialysis patients. The dialysate\\/plasma sodium concentration ratio (D\\/PNa) is an indirect index of transcellular water transport by aquaporin channels, and thus of ultra- filtration. Sodium concentration can be assessed by means of flame photometry (F), and direct (D-ISE) or indirect ion-selective electrodes (I-ISE), but these methods

Vincenzo La Milia; Salvatore Di Filippo; Monica Crepaldi; Simeone Andrulli; Lucia Del Vecchio; Pietro Scaravilli; Giovambattista Virga; Francesco Locatelli