NuSTAROBSERVATIONS OF THE STATE TRANSITION OF MILLISECOND PULSAR BINARY PSR J1023+0038

Touch screen input system about hardware connection and driver design in uCLinux were presented in this work. With the respect of hardware, it introduced working mechanism of four-wire resistive touch screen and method of calculating coordinate. Then it presented the hardware connection of touch screen input system including touch screen, touch screen control chip and Microcontroller Unit. With respect of software, it analyzed the characteristic of driver design in uCLinux. Then it divided touch screen working process into six states which were ‘start’, ‘idle’, ‘wait’, ‘read’, ‘error’, ‘end’ and defined the state transition. On this basis, Touch screen driver design was introduced, which mainly included initialization function, clean function, device-opening function, device-releasing function, coordinates-reading function and parameters-setting function. It also gave the arithmetic converting touch screen coordinate to application coordinate.

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The State Transition Diagram

Sketching User Experiences: The Workbook ◽

10.1016/b978-0-12-381959-8.50022-5 ◽

2012 ◽

pp. 153-157

Author(s):

Saul Greenberg ◽

Sheelagh Carpendale ◽

Nicolai Marquardt ◽

Bill Buxton

Keyword(s):

State Transition ◽

The State ◽

Transition Diagram ◽

State Transition Diagram

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Direct Observation of Logic-Gated Dual-Switching Behaviors Inducing the State Transition in a DNA Nanostructure

Springer Theses - Artificially Controllable Nanodevices Constructed by DNA Origami Technology ◽

10.1007/978-4-431-55769-2_3 ◽

2015 ◽

pp. 35-45

Author(s):

Yangyang Yang

Keyword(s):

Direct Observation ◽

State Transition ◽

The State ◽

Dna Nanostructure

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A Knowledge-Based Approach to Modelling of Robotic Assembly Cells

Robotica ◽

10.1017/s026357470001554x ◽

1991 ◽

Vol 9 (1) ◽

pp. 31-42 ◽

Cited By ~ 1

Author(s):

Dae-Won Kim ◽

Bum-Hee Lee ◽

Myoung-Sam Ko

Keyword(s):

Knowledge Base ◽

State Transition ◽

Knowledge Bases ◽

The State ◽

System Structure ◽

Robotic Assembly ◽

Knowledge Based ◽

Job Information ◽

Assembly Cell ◽

Transition Map

SUMMARYIn this paper, an approach to modelling of a robotic assembly cell is proposed and a method for managing the cell operation is described using a knowledge base. Since the modelling structure is based on the concept of the state variable, the relationships between states are described by the state transition map (STM). The knowledge-bases for state transition and assembly job information are obtained from the STM and the assembly job tree (AJT), respectively. Using the knowledge-base, the System structure is discussed in relation to both managing the cell operation and evaluating the performances. Finally, a simulation algorithm is presented with the simulation results to show the significance of the proposed modelling approach.

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The binary millisecond pulsar PSR J1023+0038 – II. Optical spectroscopy

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stz1652 ◽

2019 ◽

Vol 488 (1) ◽

pp. 198-212 ◽

Cited By ~ 1

Author(s):

T Shahbaz ◽

M Linares ◽

P Rodríguez-Gil ◽

J Casares

Keyword(s):

Radial Velocity ◽

Optical Spectroscopy ◽

State Transition ◽

High Energy ◽

Accretion Disc ◽

Millisecond Pulsar ◽

Mass Ratio ◽

Time Resolved ◽

Type Change ◽

Model Predictions

ABSTRACT We present time-resolved optical spectroscopy of the ‘redback’ binary millisecond pulsar system PSR J1023+0038 during both its radio pulsar (2009) and accretion disc states (2014 and 2016). We provide observational evidence for the companion star being heated during the disc state. We observe a spectral type change along the orbit, from ∼G5 to ∼F6 at the secondary star’s superior and inferior conjunction, respectively, and find that the corresponding irradiating luminosity can be powered by the high-energy accretion luminosity or the spin-down luminosity of the neutron star. We determine the secondary star’s radial velocity semi-amplitude from the metallic (primarily Fe and Ca) and Hα absorption lines during these different states. The metallic and Hα radial velocity semi-amplitude determined from the 2009 pulsar-state observations allows us to constrain the secondary star’s true radial velocity K2 = 276.3 ± 5.6 km s−1 and the binary mass ratio q = 0.137 ± 0.003. By comparing the observed metallic and Hα absorption-line radial velocity semi-amplitudes with model predictions, we can explain the observed semi-amplitude changes during the pulsar state and during the pulsar/disc-state transition as being due to different amounts of heating and the presence of an accretion disc, respectively.

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