Lateral Reentry Guidance Based on Coverage Zone Profile

2021 ◽  
pp. 467-478
Author(s):  
Zheng Qi ◽  
Xige Zhang ◽  
Lansong Wang ◽  
Xiangyang Hui ◽  
Meng Wu ◽  
...  
Keyword(s):  
Coverage Zone

scholarly journals Design optimization method of line-of-sight with JACK for bulldozer operator

2018 ◽  
Vol 176 ◽  
pp. 01003
Author(s):  
GUO Mei-ni
Keyword(s):  
Virtual Environment ◽  
Monitoring System ◽  
Lower Risk ◽  
Optimization Method ◽  
Line Of Sight ◽  
Original Design ◽  
Visual Monitoring ◽  
Visual Areas ◽  
Visual Monitoring System ◽  
Coverage Zone

The objective of this article is to investigate the line-of-sight (LOS) and visual areas in order to provide a lower risk of accident and a best available view for the operator of industry machine. This paper presented a method of simulating an bulldozer operation in a virtual environment for the sake of analyzing LOS of the operator during conditions of load and unload respectively. Coverage zone tool in the JACK software was utilized to calculate the percentage of visible zones from the virtual operator’s position. At the same time, the modification of design with additional cameras was proposed based on the results of LOS analysis, which significantly improved compared with original design. The results of this study proved that the modifications (with visual monitoring system) could improve visibility of bulldozer operators to some extent according to the optimization method.

scholarly journals Design of an application which computes the Bistatic coverage zone for The Republic of Cabo Verde

2019 ◽  
Vol 1303 ◽  
pp. 012069
Author(s):  
Ricardo Yannick Cabral Lopes Dias ◽  
Tao Liu
Keyword(s):  
Cabo Verde ◽  
The Republic ◽  
Coverage Zone

scholarly journals Space Occupancy through BLE Dynamic Broadcasting

2018 ◽  
Vol 2018 ◽  
pp. 1-17
Author(s):  
Miran Borić ◽  
Rebeca P. Díaz Redondo ◽  
Ana Fernández Vilas
Keyword(s):  
Internet Of Things ◽  
Data Exchange ◽  
Static Solution ◽  
Low Energy ◽  
Proof Of Concept ◽  
Coverage Area ◽  
Alternative Approach ◽  
Coverage Zone ◽  
Dynamic Broadcasting ◽  
Straightforward Approach

Internet of Things (IoT) merges different technologies to provide the needed infrastructure for an adequate inter-device connection and data exchange, with Bluetooth Low Energy (BLE) being one of the latest acquisitions. The use of BLE beacons offers a straightforward approach to broadcast information to any device being in the coverage zone and able to process such signal. Instead of this static solution, in this paper, we face an alternative approach that, combining both Wi-Fi and BLE beacon technologies, is able to dynamically adapt the information being broadcast depending on the particular devices in the coverage area. Taking advantage of the beacon device communications, we propose to monitor the space occupancy throughout the study area (typically inside a building) by following the beacon device data exchange. This information would be later used to improve space analysis. As a proof of concept, we have conducted an experiment inside a faculty to check the potentiality of the proposal, obtaining promising results.

scholarly journals Evaluation of Misalignment Effect in Vehicle-to-Vehicle Visible Light Communications: Experimental Demonstration of a 75 Meters Link

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3577
Author(s):  
Sebastian-Andrei Avătămăniței ◽  
Cătălin Beguni ◽  
Alin-Mihai Căilean ◽  
Mihai Dimian ◽  
Valentin Popa
Keyword(s):  
Visible Light ◽  
Visible Light Communications ◽  
Case Scenario ◽  
Vehicle Communication ◽  
Vehicle To Vehicle ◽  
Bit Error Ratio ◽  
Favorable Case ◽  
V2v Communications ◽  
The One ◽  
Coverage Zone

The use of visible light communications technology in communication-based vehicle applications is gaining more and more interest as the research community is constantly overcoming challenge after challenge. In this context, this article addresses the issues associated with the use of Visible Light Communications (VLC) technology in Vehicle-to-Vehicle (V2V) communications, while focusing on two crucial issues. On the one hand, it aims to investigate the achievable communication distance in V2V applications while addressing the least favorable case, namely the one when a standard vehicle rear lighting system is used as a VLC emitter. On the other hand, this article investigates another highly unfavorable use case scenario, i.e., the case when two vehicles are located on adjacent lanes, rather than on the same lane. In order to evaluate the compatibility of the VLC technology with the usage in inter-vehicle communication, a VLC prototype is intensively evaluated in outdoor conditions. The experimental results show a record V2V VLC distance of 75 m, while providing a Bit Error Ratio (BER) of 10−7–10−6. The results also show that the VLC technology is able to provide V2V connectivity even in a situation where the vehicles are located on adjacent lanes, without a major impact on the link performances. Nevertheless, this situation generates an initial no-coverage zone, which is determined by the VLC receiver reception angle, whereas in some cases, vehicle misalignment can generate a BER increase that can go up to two orders of magnitude.

scholarly journals Problem of obstetrical evacuations of patients coming from maternities outside the coverage zone of the university and hospital center of Treichville (Abidjan-Côte d’Ivoire)

2017 ◽  
Vol 7 (1) ◽  
pp. 15
Author(s):  
Jean Marc Dia ◽  
Edouard Nguessan ◽  
Mohamed Fanny ◽  
Mouhideen Oyelade ◽  
Gerard Okon ◽  
...  
Keyword(s):  
Fetal Death ◽  
Descriptive Study ◽  
Sociodemographic Characteristics ◽  
Health Coverage ◽  
Monthly Income ◽  
Death Rates ◽  
Coverage Zone ◽  
The University ◽  
Hospital Center

Background: In developing countries, the organization of obstetrical evacuations is experiencing real problems causing certain preventable maternal and fetal morbidity and mortality. Objective of present study was to describe the sociodemographic characteristics and conditions of transfer of patients from peripheral maternities not dependent on the health coverage zone of the University and Hospital Center of Treichville (called maternity out of zone).Methods: This is a prospective and descriptive study, conducted at the maternity of the University and Hospital Center of Treichville, from 1st August 2012 to 31st July 2014 about 266 patients evacuated from maternity out of zone.Results: Only 30% of the patients had properly documented evacuation records. Patients had an average age of 26.9 years, poor follow-up of their pregnancy (92.1%), and were generally low socio-economic level: without monthly income (61.7%), not attending school (35.3%). The majority of evacuations were decided by midwives (60.9%) and were done by taxi (69.5%). In 71.4% of the cases, the patients were re-evacuated to our department with the main reason for the unavailability of the operating rooms (84.3%). 46.6% of the patients took more than 3 hours to arrive in our department and 35% arrived in an aggravated condition and sometimes without venous routes. In our department, complications occurred in 27.1% of the patients, and maternal and fetal death rates were respectively 1.5% and 21.3%.Conclusions: This study revealed malfunctions encountered during evacuations: unsafe transportation, transfer card misinformed, long transfer time.

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