scholarly journals Three-dimensional simulations of the accretion process in Kerr space-time with arbitrary value of the spin parameter

2010 ◽  
Vol 82 (6) ◽  
Author(s):  
Cosimo Bambi ◽  
Naoki Yoshida
Keyword(s):  
Three Dimensional ◽  
Space Time ◽  
Accretion Process ◽  
Spin Parameter ◽  
Kerr Space ◽  
Three Dimensional Simulations

scholarly journals Shadow of a Kerr-like black hole

2014 ◽  
Vol 10 (S312) ◽  
pp. 135-136
Author(s):  
Farruh Atamurotov
Keyword(s):  
Black Hole ◽  
Angular Momentum ◽  
Deformation Parameter ◽  
Space Time ◽  
Black Hole Spin ◽  
Spin Parameter ◽  
Kerr Space ◽  
The One

AbstractThe shadow of a Kerr-like black hole has been considered and it was shown that in addition to the specific angular momentum a, deformation parameter of Kerr-like space-time essentially deforms the shape of the black hole shadow. For a given value of the black hole spin parameter a, the presence of a deformation parameter ε reduces the shadow and enlarges its deformation with respect to the one in the Kerr space-time.

Instabilities in Three‐dimensional Simulations of Astrophysical Jets Crossing Tilted Interfaces

1998 ◽  
Vol 493 (1) ◽  
pp. 81-90 ◽  
Author(s):  
Jagbir S. Hooda ◽  
Paul J. Wiita
Keyword(s):  
Three Dimensional ◽  
Astrophysical Jets ◽  
Three Dimensional Simulations

scholarly journals Three-dimensional simulations of void collapse in energetic materials

2018 ◽  
Vol 3 (3) ◽  
Author(s):  
Nirmal Kumar Rai ◽  
H. S. Udaykumar
Keyword(s):  
Energetic Materials ◽  
Three Dimensional ◽  
Three Dimensional Simulations

scholarly journals Two- and three-dimensional simulations of Rayleigh–Taylor instabilities using a coupled Cahn–Hilliard/Navier–Stokes model

2020 ◽  
Vol 32 (12) ◽  
pp. 124115
Author(s):  
R. Zanella ◽  
G. Tegze ◽  
R. Le Tellier ◽  
H. Henry
Keyword(s):  
Three Dimensional ◽  
Navier Stokes ◽  
Three Dimensional Simulations

scholarly journals Spatiotemporal Analysis of COVID-19 Spread with Emerging Hotspot Analysis and Space–Time Cube Models in East Java, Indonesia

2021 ◽  
Vol 10 (3) ◽  
pp. 133
Author(s):  
Purwanto Purwanto ◽  
Sugeng Utaya ◽  
Budi Handoyo ◽  
Syamsul Bachri ◽  
Ike Sari Astuti ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Distribution Patterns ◽  
Spatiotemporal Analysis ◽  
Space Time ◽  
Road Density ◽  
Hotspot Analysis ◽  
Spatiotemporal Information ◽  
Depth Analysis ◽  
Analysis Models ◽  
Oscillating Patterns

In this research, we analyzed COVID-19 distribution patterns based on hotspots and space–time cubes (STC) in East Java, Indonesia. The data were collected based on the East Java COVID-19 Radar report results from a four-month period, namely March, April, May, and June 2020. Hour, day, and date information were used as the basis of the analysis. We used two spatial analysis models: the emerging hotspot analysis and STC. Both techniques allow us to identify the hotspot cluster temporally. Three-dimensional visualizations can be used to determine the direction of spread of COVID-19 hotspots. The results showed that the spread of COVID-19 throughout East Java was centered in Surabaya, then mostly spread towards suburban areas and other cities. An emerging hotspot analysis was carried out to identify the patterns of COVID-19 hotspots in each bin. Both cities featured oscillating patterns and sporadic hotspots that accumulated over four months. This pattern indicates that newly infected patients always follow the recovery of previous COVID-19 patients and that the increase in the number of positive patients is higher when compared to patients who recover. The monthly hotspot analysis results yielded detailed COVID-19 spatiotemporal information and facilitated more in-depth analysis of events and policies in each location/time bin. The COVID-19 hotspot pattern in East Java, visually speaking, has an amoeba-like pattern. Many positive cases tend to be close to the city, in places with high road density, near trade and business facilities, financial storage, transportation, entertainment, and food venues. Determining the spatial and temporal resolution for the STC model is crucial because it affects the level of detail for the information of endemic disease distribution and is important for the emerging hotspot analysis results. We believe that similar research is still rare in Indonesia, although it has been done elsewhere, in different contexts and focuses.

scholarly journals First application of large reactivity measurement through rod drop based on three-dimensional space–time dynamics

2021 ◽  
Vol 32 (2) ◽  
Author(s):  
Wen-Cong Wang ◽  
Li-Yuan Huang ◽  
Cai-Xue Liu ◽  
Han Feng ◽  
Jiang Niu ◽  
...  
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Space Time ◽  
Time Dynamics ◽  
Reactivity Measurement ◽  
Dimensional Space Time ◽  
Three Dimensional Space
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