Robust Interactive Collision Handling between Tools and Thin Volumetric Objects

2012 ◽  
Vol 18 (8) ◽  
pp. 1241-1254 ◽  
Author(s):  
J. Spillmann ◽  
M. Harders
Keyword(s):  
Collision Handling ◽  
Volumetric Objects

Collision handling for free-form deformation embedded surface

2011 ◽  
Vol 5 (4) ◽  
pp. 341 ◽  
Author(s):  
S. Jung ◽  
M. Hong ◽  
M.-H. Choi
Keyword(s):  
Free Form ◽  
Collision Handling ◽  
Free Form Deformation

scholarly journals Methods For Calculating Radio Holograms Of Volumetric Objects

2020 ◽  
Vol 12 (4) ◽  
pp. 429-436
Author(s):  
Valery A. Golunov ◽  
◽  
Vadim A. Korotkov ◽  
Keyword(s):  
Point Sources ◽  
Real Point ◽  
Two Dimensional ◽  
Frequency Range ◽  
Satisfactory Accuracy ◽  
Phase Errors ◽  
Sphere Radius ◽  
Virtual Point ◽  
Volumetric Objects

A method for calculating holograms for volumetric objects based on the representation of objects in the form of ensembles of virtual point sources distributed on a set of parallel planes has been proposed. The proposed method is the development of the well-known method in which objects are represented as ensemble of real point scatterers. The possibilities of the proposed method are demonstrated by calculating a hologram of a fragment of a sphere, on which 1000 points are randomly selected, at which radiation emanating from the center of the sphere is scattered. The choice of a fragment of a sphere as an object under study is due to the fact that when calculating its hologram, phase errors inherent in approximate calculations are most pronounced. The calculations were performed for the frequency range of 2...100 GHz, the sphere radius of 0.5 m, a two-dimensional hologram size of 0.65×0.65 m, and a pixel count of 512×512. It is shown that, in comparison with the known method, the proposed method makes it possible to calculate the amplitude of a hologram with satisfactory accuracy if virtual sources are placed on parallel planes in an amount of more than 64 pieces. In the case of objects that require representation in the form of an ensemble of point scatterers in the amount of more than 1000 pieces, the calculation of their holograms by the proposed method turns out to be much more efficient than the known method.

scholarly journals A Hybrid based Distributed Slot Scheduling Approach for WSN MAC

2019 ◽  
Vol 15 (2) ◽  
Author(s):  
Manas Ranjan Lenka ◽  
Amulya Ratna Swain ◽  
Biraja Prasad Nayak
Keyword(s):  
Mac Protocol ◽  
Hybrid Approach ◽  
Optimal Schedule ◽  
Vital Role ◽  
Mac Protocols ◽  
Feasible Schedule ◽  
Collision Handling ◽  
Different Types ◽  
Important Challenge ◽  
Slot Scheduling

In Wireless Sensor Networks(WSNs), collision handling during transmission of data is an important challenge. MAC protocol plays a vital role in handling those collisions. Among different types of MAC protocols, schedule based MAC protocol is one where a valid schedule is prepared to handle the collision. The existing schedule based MAC protocols focus on preparing either a feasible schedule or an optimal schedule. In order to satisfy both feasibility as well as optimality feature, in this paper, we proposed a hybrid approach for slot scheduling that prepares a feasible schedule in a distributed manner and at the same time reduces the number of feasible schedule to achieve optimality. In this paper, we named this algorithm as Distributed hybrid Slot Scheduling(DHSS) algorithm. The proposed DHSS algorithm initially prepares a feasible schedule which is furthertuned in quick time to prepare a valid schedule with a reducednumber of slots. The reduction of the number of slots in theschedule improves the efficiency of data transmission in termsof latency. The simulation results show that the DHSS algorithmoutperforms RD-TDMA with respect to both the number of slotsallotted for a feasible schedule as well as the data transmissionlatency.

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