T. Johnson

Details der Publikationsliste

Zeitraum

1861 - 2009

Anzahl

146

Co-Autoren

Magnetic field ripple effect on JET Intrinsic Rotation (2009)

Nave, M.F.F., Johnson, T., Salmi, A., Tala, Tuomas Et Al.

36th European Physical Society Conference on Plasma Physics, Sofia, Bulgaria, June 29-July 3, 2009

POINTS (2008)

See Www. Rsna, See Last Page, Elliot K. Fishman, Md Derek, R. Ney, Bs David, ...

After reading this article and taking the test, the reader will be able to: � Describe the technical advantages and disadvantages of volume rendering and maximum intensity projection (MIP) for...

THE CANADIAN LIGHT SOURCE CONTROL SYSTEM: LESSONS LEARNED FROM BUILDING A SYNCHROTRON AND BEAMLINES ABSTRACT CONTROL SYSTEM (2008)

E. Matias, R. Berg, N. Johnson, T. Johnson, M. Mckibben, R. Tanner, ...

The Canadian Light Source (CLS) is a 2.9 GeV synchrotron that recently went into service. This paper presents some of the choices made in the design of this facility control system, and lessons...

Approved by (2008)

Prof Joel, T. Johnson, Prof Ronald, M. Reano

Radio Frequency Interference (RFI) can adversely impact microwave passive re-mote sensing measurements, and prohibits passive observations outside protected por-tions of the radio frequency spectrum....

1 IT08 Self-consistent Study of Fast Particle Redistribution by Alfvén Eigenmodes During Ion Cyclotron Resonance Heating (2008)

T. Bergkvist, T. Hellsten, T. Johnson

Abstract. Alfvén eigenmodes (AEs) excited by fusion born α particles can degrade the heating efficiency of a burning plasma and throw out αs. To experimentally study the effects of excitation of...

Hierarchical Matrix Timestamps for Reliable and Scalable Update Propagation (2007)

T. Johnson, K. Jeong

Data replication is crucial for both performance and availability in large-scale distributed database and information systems (e.g., Internet services such as news, directory services, and Web search...

Upgrade of the Monte Carlo code FIDO (2007)

J. Hedin, T. Johnson, T. Hellsten

During rf heating on minority ions and current drive the velocity distribution is determined by the balance between the wave-particle interaction and the relaxation through Coulomb collision. This is...

Abstract Measurement and Analysis of IP Network Usage and Behavior (2007)

R. Cáceres, N. G. Duffield, A. Feldmann, J. Friedmann, A. Greenberg, R. Greer, ...

Traffic, usage, and performance measurements are crucial to the design, operation and control of Internet Protocol (IP) networks. This paper describes a prototype infrastructure for the measurement,...

On ion cyclotron current drive for sawtooth control (2006)

Eriksson, L. G., Johnson, T., Mayoral, M. L., Coda, S., Sauter, O., Buttery, R. J., ...

Experiments using ion cyclotron current drive (ICCD) to control sawteeth are presented. In particular, discharges demonstrating shortening of fast ion induced long sawteeth reported in (Eriksson et...

Integrated ELM Modelling. (2006)

Lönnroth, J.S., Bateman, G., Becoulet, M., Beyer, P., Corrigan, G., Figarella, C., ...

10th Internat.Workshop on Plasma Edge Theory in Fusion Devices (PET 10), Jülich, October 17-19, 2005

Dietary restriction in the nematode Caenorhabditis elegans (2005)

Houthoofd, K, Johnson, T, Vanfleteren, J

The first observation of the positive effect of reduced food intake on mammalian life span was made 70 years ago (1). In the decades that followed, researchers successfully applied this method to...

On parasitic absorption in FWCD experiments in JET ITB plasmas (2005)

Hellsten, T., Laxåback, M., Bergkvist, T., Johnson, T., Meo, F., Mantsinen, M., ...

32nd EPS Conference on Controlled Fusion and Plasma Physics. Tarragona, ES, 27 June - 1 July 2005. Europhysics Conference Abstracts. Vol. 29C, P-5.095

Destabilization of Fast-Ion-Induced Long Sawteeth by Localized Current Drive in the JET Tokamak (2004)

Eriksson, L.G., Mueck, A., Sauter, O., Coda, S., Mantsinen, M.J., Mayoral, M.L., ...

In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free...

Destabilization of fast-ion-induced long sawteeth by localized current drive in the JET tokamak (2004)

Eriksson, L. G., Mueck, A., Sauter, O., Coda, S., Mantsinen, M. J., Mayoral, M. L., ...

In a tokamak fusion reactor the energetic alpha particles will transiently stabilize the magnetohydrodynamic activity causing sawtooth oscillations. The crash events terminating long sawtooth free...

Plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (2004)

Eriksson, L. G., Johnson, T., Hellsten, T., Giroud, C., Kiptily, V. G., Kirov, K., ...

Changes of the toroidal plasma rotation induced by directed waves in the ion-cyclotron range of frequencies (ICRF) have been identified experimentally for the first time on the JET tokamak. The...

Dynamic mechanical behavior of acrylonitrile butadiene rubber/poly(ethylene-co-vinyl acetate) blends (2002)

Johnson, T, Bhagawan, SS, Joseph, S, Thomas, S

The dynamic mechanical behavior of uncrosslinked (thermoplastic) and crosslinked (thermosetting) acrylonitrile butadiene rubber/poly(ethylene-co-vinyl acetate) (NBR/EVA) blends was studied with...

Control of sawteeth and triggering of NTMs with ion cyclotron resonance frequency waves in JET (2002)

Westerhof, E., Sauter, O., Mayoral, M. L., Howell, D. F., Mantsinen, M. J., Nave, M. F. F., ...

A new scenario to delay or prevent neoclassical tearing mode (NTM) onset is presented. By active sawtooth destabilization, short period and low amplitude sawteeth are generated, such that the...

Control of neoclassical tearing modes by sawtooth control (2002)

Sauter, O., Westerhof, E., Mayoral, M. L., Alper, B., Belo, P. A., Buttery, R. J., ...

The onset of a neoclassical tearing mode (NTM) depends on the existence of a large enough seed island. It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period...

Overview of results and possibilities for fast particle research on JET (2002)

Pamela, J., Stork, D., Solano, E., Baranov, Y. F., Borba, D., Challis, C. D., ...

The large physical size of the JET tokamak, its heating systems and diagnostics, and its capability to operate with full deuterium-tritium (D-T) plasmas, including high-power tritium neutral beam...

Analysis of ion cyclotron heating and current drive at omega approximate to 2 omega(cH) for sawtooth control in JET plasmas (2002)

Mantsinen, M. J., Angioni, C., Eriksson, L. G., Gondhalekar, A., Hellsten, T., Johnson, T., ...

Ion cyclotron heating and current drive at omega approximate to 2omega(cH) in JET deuterium plasmas with a hydrogen concentration n(H)/(n(D)+n(H)) in the range of 5-15% are analysed, comparing...

ICRF current drive experiments on JET (2001)

Nguyen, F., Noterdame, J., Mayoral, M., Hellsten, T., Mantsinen, M., Hartmann, D., ...

Proceedings of the 28th EPS Conference on Controlled Fusion and Plasma Physics. Funchal, Madeira, PT, 18 - 22 June 2001. CD-ROM

The role of crosslinking and crystallisation on the transport characteristics of ethylene-propylene rubber membranes (2000)

Sreekala, MS, Unnikrishnan, G, Johnson, T, Thomas, S

The transport characteristics of ethylene-propylene rubber (EPR) membranes have been examined using four aromatic hydrocarbons as probe molecules. The EPR was crosslinked by different percentage of...

Online Data Mining for Co-Evolving Time Sequences (2000)

Byoung-Kee Yi, N. D. Sidiropoulos, T. Johnson, H. V. Jagadish, C. Faloutsos, ...

In many applications, the data of interest comprises multiple sequences that evolve over time. Examples include currency exchange rates, network traffic data, and demographic data on multiple...

Measurement and Analysis of IP Network Usage and Behavior (2000)

Caceres Duffield Feldmann, R. Caceres, N. G. Duffield, A. Feldmann, J. Friedmann, A. Greenberg, ...

Traffic, usage, and performance measurements are crucial to the design, operation and control of Internet Protocol (IP) networks. This paper describes a prototype infrastructure for the measurement,...

Measurement and Analysis of IP Network Usage and Behavior (2000)

R. Caceres, N.G. Duffield, J. Friedmann, J. Friedmann, A. Greenberg, R. Greer, ...

Traffic, usage, and performance measurements are crucial to the design, operation and control of Internet Protocol (IP) networks. This paper describes a prototype infrastructure for the measurement,...

Online data mining for co-evolving time sequences (2000)

H. V. Jagadish, C. Faloutsos, T. Johnson, A. Biliris

under Contract No. N66001-97-C-8517. Additional funding was provided by donations from NEC and Intel. Any opinions, ndings, and conclusions or recommendations expressed in this material are those of...

Title Optimistic Distributed Simulation in an Uninhabited Air Vehicle Flight Control System Author(s) S.F. Bush Phone (518)387-6827 (2000)

S. F. Bush, T. Johnson, T. Johnson

Number of Pages 24 Class 1 Key Words Uninhabited air vehicle, active state model, active networks This paper focuses on time management in autonomous control of uninhabited air vehicles. Advances in...

A High-Performance Data Server for High Energy Physics (1997)

Athanas Jeong Johnson, M. Athanas, K. Jeong, T. Johnson, S. Ranka, H. Yoon

High Energy Physics collaborations are faced with exponentially growing data sets due to recent technological advances and need of better statistics for rare processes. The collaborations are large...

A High-Performance Data Server for High Energy Physics (1997)

M. Athanas, K. Jeong, T. Johnson, S. Ranka, H. Yoon

High Energy Physics collaborations are faced with exponentially growing data sets due to recent technological advances and need of better statistics for rare processes. The collaborations are large...

Hierarchical Matrix Timestamps for Scalable Update Propagation (1996)

T. Johnson, K. Jeong

Update propagation is a technique for the weakly consistent replication of a database. Operations are performed at the local copy of the database, then are asynchronously propagated to the replicas....

Locking Based Concurrency Control for Integrated Real-Time Database Systems (1996)

D. Hong, S. Chakravarthy, T. Johnson

In many database applications, incoming transactions are a mixed load of conventional (non real-time) and real-time (typically soft and firm) transactions. In this environment, transactions can even...

Alternative Version Concurrency Control (AVCC) for firm real-time database system (1995)

D. Hong, S. Chakravarthy, T. Johnson

By definition, firm real-time transactions are discarded when they miss their deadlines, as there is no value to completing them after they miss their deadlines. Several approaches that exploit the...

Incorporating Load Factor into the Scheduling of Soft Real-Time Transactions (1994)

S. Chakravarthy, D. Hong, T. Johnson

In real-time databases (as opposed to real-time systems), transactions must satisfy the ACID properties in addition to satisfying the timing constraints specified for each transaction (or task)....

Plasma arc remelting of steels and nickel-based superalloys (1993)

Sparks, N., Young, J., Shaw, L., Johnson, T.

The IRC Plasma Arc Cold Hearth Remelting (PACHR) furnace has been used to produce 100mm and 150mm diameter ingots of alloy 718, M50 bearing steel and G110 maraging steel from VIM/VAR feedstocks....

Plasma melting : intelligent control strategies (1993)

Ward, R., Fellows, A., Johnson, T., Young, J., Jacobs, M.

The closed-loop control of a plasma-arc melting furnace was investigated. The different sub-processes were found to be highly coupled, and the available sensors and actuators were insufficient. Both...

The microstructure of plasma arc cold-hearth melted Ti-48Al-2Mn-2Nb (1993)

Johnson, T., Jesper, N., Young, J., Ward, R., Jacobs, M.

The purpose of this paper is to show the results of some work at the IRC in Materials for High Performance Applications at the University of Birmingham into the effect of processing and process...

Plasma arc remelting of steels and nickel-based superalloys (1993)

Sparks, N., Young, J., Shaw, L., Johnson, T.

The IRC Plasma Arc Cold Hearth Remelting (PACHR) furnace has been used to produce 100mm and 150mm diameter ingots of alloy 718, M50 bearing steel and G110 maraging steel from VIM/VAR feedstocks....

Plasma melting : intelligent control strategies (1993)

Ward, R., Fellows, A., Johnson, T., Young, J., Jacobs, M.

The closed-loop control of a plasma-arc melting furnace was investigated. The different sub-processes were found to be highly coupled, and the available sensors and actuators were insufficient. Both...

The microstructure of plasma arc cold-hearth melted Ti-48Al-2Mn-2Nb (1993)

Johnson, T., Jesper, N., Young, J., Ward, R., Jacobs, M.

The purpose of this paper is to show the results of some work at the IRC in Materials for High Performance Applications at the University of Birmingham into the effect of processing and process...

Real-Time Transaction Scheduling : A Cost Conscious Approach (1993)

D. Hong, T. Johnson, S. Chakravarthy

Real-time databases are an increasingly important component of embedded realtime systems. In a real-time database context, transactions must not only maintain the consistency constraints of the...

[Lincoln Portrait] (1899)

Johnson, T.

Shows a clean-shaven Abraham Lincoln from the waist up with a fully engraved background.

Abraham Lincoln (1861)

Johnson, T.

Profile portrait of Abraham Lincoln with a facsimile signature below it.

[Profile Portrait]

Johnson, T.

Profile portrait of Abraham Lincoln.

[Abraham Lincoln]

Johnson, T.

Portrait of Abraham Lincoln.

Risk of accidents in drivers with epilepsy.

Taylor, J, Chadwick, D, Johnson, T

OBJECTIVE--To estimate the risks of road traffic accidents over a period of three years in drivers with a history of single seizures or epilepsy, and to compare them with a cohort of drivers followed...

"Cold calling" in psychiatric follow up studies: is it justified?

Tyrer, P, Seivewright, H, Ferguson, B, Johnson, T

Objectives: To decide if cold calling was ethically justifiable and, if so, to set guidelines for researchers.

Improving the self reporting of tobacco use: results of a factorial experiment

Cowling, D, Johnson, T, Holbrook, B, Warnecke, R, Tang, H

Objectives: To examine divergent estimates of smoking prevalence in two random digit dial surveys for the same population. Based upon internal and external reviews of survey procedures, differences...

Chloramphenicol and phenobarbitone--a drug interaction.

Bloxham, R A, Durbin, G M, Johnson, T, Winterborn, M H

Two infants with meningitis who were treated with phenobarbitone and high-dose chloramphenicol showed progressive falls in the peak blood levels of chloramphenicol. A standard chloramphenicol dose of...

Socioeconomic status and the expectation of disability in old age: estimates for England

Melzer, D., McWilliams, B., Brayne, C., Johnson, T., Bond, J.

OBJECTIVES—The longer life expectancy in old age of more privileged socioeconomic groups is well established, but less clear is whether the net effect of additional years of life is a lengthened,...

An observational study to evaluate micronutrient status during enteral feeding

Johnson, T, Janes, S, MacDonald, A, Elia, M, Booth, I

Background: There are few data on the optimal micronutrient composition of paediatric enteral feeds. The recent European Directive on Foods for Special Medical Purposes (1999/21/EC) did not...

Increasing productivity and reducing errors through usability analysis: a case study and recommendations.

Johnson, C. M., Johnson, T., Zhang, J.

The usability problems of a system often occur due to inattention to well-documented and well-established design guidelines and heuristics. These problems often lead to increased errors, user...

Young black males and trauma: predisposing factors to presentation in an urban trauma unit.

Godbold, D. T., Grant, M., Rydman, R., Smith, R., Johnson, T.

Young black males are disproportionately represented as patients in trauma units. Unemployment, low educational level, and family composition may predispose young black males to trauma unit...

MINOR LEAGUE BASEBALL: RISKS AND POTENTIAL BENEFITS FOR COMMUNITIES LARGE AND SMALL

T. JOHNSON

Communities of all sizes are investing in minor league stadiums to attract or retain a minor league baseball team. The promise of economic development benefits is often put forward to justify these...

Randomised controlled trial of two models of care for discharged psychiatric patients.

Tyrer, P., Evans, K., Gandhi, N., Lamont, A., Harrison-Read, P., Johnson, T.

OBJECTIVE: To compare the clinical outcome and costs of care of psychiatric patients allocated to community multidisciplinary teams or to hospital based care programmes after discharge from inpatient...