Performance of a Y-Ba-Cu-O Josephson Junction Filter

Suzuki, Koji; Yamaguchi, Keita; Hayashi, Kei; Fujino, S.; Takenaka, T.; Imai, K.; Suginoshita, Fumiyasu; Yazawa, N.; Enomoto, Youichi

doi:10.1007/978-4-431-68305-6_255

Cited by 3 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The height of the net assembly is 0.1525 m. This means that the four corners of the table tennis table and the end points of the net assembly cannot enclose the measurement area and are not suitable control points for calculating the camera parameters by DLT method. Thus, the developed system calculated camera parameters using the method proposed by Suzuki, Takenaka, Enomoto, and Tauchi (2016). According to their approach, the camera parameters can be estimated when a minimum of three points with known real coordinates (control points) are visible in the image.…”

Section: Camera Calibrationmentioning

confidence: 99%

See 1 more Smart Citation

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Tamaki,

Yamagata,

Hashizume

2024

International Journal of Computer Science in Sport

View full text Add to dashboard Cite

The spin of the ball plays a crucial role in table tennis tactics. However, it has rarely been measured and reported for the broadcast audience to better understand table tennis matches. This paper introduces a system designed to measure the spin of a table tennis ball without using electrically synchronized shutters or high-speed cameras. The system employs multiple unsynchronized cameras to detect the logos printed on the ball and estimates its three-dimensional translational motion to determine the spin rate (rotational velocity expressed in the revolutions per unit time) and spin axis (imaginary line around which the ball rotates). An experimental analysis indicated median errors of 0.78 rps and 12.5° in spin rate and axis, respectively. Additionally, the system exhibited sufficient resolution to analyze the spin rate and axis of a service ball in table tennis, distinguishing between spin axes that differ by 30° with 95.8% confidence. The developed system was used in the Japanese T-League to report the spin of several services after the live streaming of matches. The developed system successfully measured the spins of 92.1% of the served balls, confirming that the system has sufficient capability to feedback spin data immediately after a match.

show abstract

Section: Camera Calibrationmentioning

confidence: 99%

“…In this system, camera parameters were calculated by the method of Suzuki et al (2016) using the four corners of the table tennis table and two end points of the net assembly as control points.…”

Section: Camera Calibrationmentioning

confidence: 99%

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Tamaki,

Yamagata,

Hashizume

2024

International Journal of Computer Science in Sport

View full text Add to dashboard Cite

show abstract

Noise figure of HTS JJ MMIC downconverter at 12 GHz

Suzuki

Yamaguchi

Hayashi

et al.

1993 IEEE MTT-S International Microwave Symposium Digest

View full text Add to dashboard Cite

Microwave Properties of Y₁Ba₂Cu₃O_7-x Step-Edge Josephson Junction Series Arrays

Yamaguchi

Hayashi

Suzuki

et al. 1996

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

Effects on microwave detection of a series-connected Josephson junction array are examined. The series-connected 10 step-edge Josephson junctions (10-SEJJs) are fabricated by Y1Ba2Cu3O7- x thin films on MgO substrates. Their responsivities as microwave broad-band detectors are evaluated by constructing microstrip circuits for measuring transmission and return power. 948 V/W is obtained at 17 K. This value is several times greater than 139 V/W of a single SEJJ at 17 K. Additionally, the return power from 10-SEJJs is less than that from the single SEJJ, as the bias current or the temperature increases. The small return power is attributed to the increase in the normal resistance of the SEJJ.

show abstract

Performance of a Y-Ba-Cu-O Josephson Junction Filter

Cited by 3 publications

References 3 publications

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Noise figure of HTS JJ MMIC downconverter at 12 GHz

Microwave Properties of Y₁Ba₂Cu₃O_7-x Step-Edge Josephson Junction Series Arrays

Contact Info

Product

Resources

About

Performance of a Y-Ba-Cu-O Josephson Junction Filter

Cited by 3 publications

References 3 publications

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Spin measurement system for table tennis balls based on asynchronous non-high-speed cameras

Noise figure of HTS JJ MMIC downconverter at 12 GHz

Microwave Properties of Y1Ba2Cu3O7-x Step-Edge Josephson Junction Series Arrays

Contact Info

Product

Resources

About

Microwave Properties of Y₁Ba₂Cu₃O_7-x Step-Edge Josephson Junction Series Arrays