Extreme GeoSteering in Complex Channel Sand Architecture, a Reality Now With High Definition Deep Directional Multi Boundary Detecting Technology: Case Study from Greater Burgan Field, Kuwait

2016 ◽  
Author(s):  
Hussain Bahman ◽  
Anfal Mohammed Aqeel ◽  
Omran Al-Zankawi ◽  
Naz H. Gazi ◽  
Salem Al-Sabea ◽  
...  
Keyword(s):  
High Definition ◽  
Complex Channel

A Systematic Approach for Online Minimizing Volume Difference of Multiple Chambers in Machining Processes Based on High-Definition Metrology

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
De-Lin Huang ◽  
Shi-Chang Du ◽  
Gui-Long Li ◽  
Zhuo-Qi Wu
Keyword(s):  
Systematic Approach ◽  
High Definition ◽  
Combustion Chambers ◽  
Boundary Extraction ◽  
Machining Processes ◽  
Multi Objective ◽  
Volume Variation ◽  
Machining Parameter ◽  
Volume Difference

The volume variation of multiple chambers of a workpiece is one of the most important factors that can directly influence the performance of the final product. This paper presents a novel systematic approach for online minimizing the volume difference of multiple chambers of a workpiece based on high-definition metrology (HDM). First, the datum of high-density points is transformed by a random sample consensus (RANSAC) algorithm due to its good robustness in fitting. Second, a procedure containing reconstruction of interior curved surfaces of chambers, boundary extraction, and projection is developed to calculate the accurate volumes of the multiple chambers. Third, a model for obtaining an optimized machining parameter for depth of chambers is explored to minimize the volume difference of any two ones of all the chambers. The model is formulated as a multi-objective optimization (MOO) problem, and a new procedure of multi-objective particle swarm optimization (MOPSO) algorithm is developed to solve this problem. Finally, a milling depth is output as the optimal milling parameter for controlling the volume variation of multiple chambers. The results of a case study show that the proposed approach can minimize the volume difference of four combustion chambers of a cylinder head and it can be well applied online in volume variation control of multiple chambers in machining processes.

Maximizing Recovery from Gas Injection in a Complex Channel System - Edop Field Case Study

2013 ◽  
Author(s):  
R.J. Onwude ◽  
C. Jackson ◽  
E. Anidi ◽  
A. Ojo ◽  
F. Obere ◽  
...  
Keyword(s):  
Gas Injection ◽  
Channel System ◽  
Field Case ◽  
Complex Channel

Microvascular Decompression for Patients With Hemifacial Spasm Associated With Common Trunk Anomaly of the Cerebellar Arteries—Case Study and Review of Literature

2017 ◽  
Vol 14 (2) ◽  
pp. 121-127 ◽  
Author(s):  
Ehab El Refaee ◽  
Christian Rosenstengel ◽  
Joerg Baldauf ◽  
Dirk T Pillich ◽  
Marc Matthes ◽  
...  
Keyword(s):  
Hemifacial Spasm ◽  
Microvascular Decompression ◽  
Common Trunk ◽  
Review Of Literature ◽  
Herpes Encephalitis ◽  
High Definition ◽  
Total Recovery ◽  
The Common

Abstract BACKGROUND Few previous studies have described the origin of both anterior and posterior inferior cerebellar arteries from one vessel as a common trunk anomaly. No previous studies have clearly described the aforementioned anomaly depending on intraoperative endoscopic visualization. OBJECTIVE To evaluate the association of a common trunk anomaly with hemifacial spasm, which makes microvascular decompression more challenging. METHODS All patients with common trunk anomaly associated with hemifacial spasm who received surgical treatment between 2006 and 2015 in our institution were identified in our prospectively collected database. Detection of the common trunk anomaly was performed using the intraoperative high-definition endoscopic inspection and confirmed by a retrospective review of the obtained operative videos. RESULTS Out of 248 cases of hemifacial spasm, 21 cases with a common trunk anomaly were detected, with an incidence rate of 8.5%. In 6 cases, the spasm was caused by more than 1 offending vessel “complex compression.” In 19 cases, total recovery occurred on follow-up, while in 1 case, 90% recovery occurred. One patient was spasm-free immediately after surgery, but died 3 wk after operation from herpes encephalitis. CONCLUSION Common trunk anomaly in hemifacial spasm is rare. The surgical technique is mostly identical to decompression with normally arising vessels. However, in case of a bifurcation situated close to the compression site where the offending vessel cannot be transposed freely, an extensive cushioning along the trunk and the offending vessels with teflon pledgets should be performed. The presence of a common trunk anomaly does not affect the surgical results.

At-Risk World Heritage and Virtual Reality Visualization for Cyber-Archaeology

2020 ◽  
pp. 151-171
Author(s):  
Thomas E. Levy ◽  
Connor Smith ◽  
Kristin Agcaoili ◽  
Anish Kannan ◽  
Avner Goren ◽  
...  
Keyword(s):  
At Risk ◽  
Virtual Reality ◽  
Cultural Heritage ◽  
Middle Eastern ◽  
Dead Sea ◽  
Economic Benefits ◽  
High Definition ◽  
Heritage Site ◽  
Temple Mount

In this chapter, the issue of at-risk cultural heritage in the Middle East is addressed through the application of cyber-archaeology tools for data capture and dissemination. Working with an economic model to create a Heritage Asset District in the environs of Jerusalem, virtual reality for personal head-mounted devices and immersive CAVE platforms are used to help create high-value cultural heritage attractions designed to attract visitors to the district, thereby generating economic benefits. In the case study presented here, the district focuses on the Kidron Valley, which has its origin near the Temple Mount in the Old City of Jerusalem, and follows the river flowing eastward through the Judean Desert, where it empties into the Dead Sea. The most prominent cultural heritage site along the wadi (riverbed) is the Mar Saba Greek Orthodox monastery, dating to the fifth century CE. A helium-balloon photographic platform with high-definition photography and Structure from Motion (SfM) processing was used to create a 3D model of this impressive site that could be used for VR demonstrations. The demo is then made available over the MedArchNet (http://medarchnet.calit2.net/) online digital atlas to enable public engagement with Middle Eastern cultural heritage. This research is part of a University of California Office of the President Catalyst Grant concerning “At-Risk Cultural Heritage and the Digital Humanities.”

scholarly journals Advanced Technologies Utilized in the Reconstruction of an Officer-Involved Shooting Incident

2017 ◽  
Vol 34 (2) ◽  
Author(s):  
Richard M. Ziernicki ◽  
Angelos G. Leiloglo
Keyword(s):  
Virtual Reality ◽  
Police Officer ◽  
Motion Capture ◽  
Laser Scanning ◽  
High Definition ◽  
Video Footage ◽  
Advanced Technologies ◽  
Infrared Video ◽  
Display Systems

This paper presents a case study that utilized many of the latest forensic technologies to reconstruct the events that occurred during an officer-involved shooting incident in which a police officer fatally shot a fel-low police officer. The shooting reconstruction utilized 3-D high-definition laser scanning, “matchmoving” of police helicopter infrared video footage, motion capture, photogrammetry, creation of a 3-D interactive virtual shooting scene, and virtual reality display systems. It also outlines how the trajectory of bullets were reconstructed, and how the position and posture of the shooting officer and victim officer were determined. Finally, federal judge rulings on various Daubert motions (509 U.S. 579 [1993]) to exclude or limit testi-mony of expert witnesses are presented.

scholarly journals High-Definition Mapping of the Gutenberg–Richter b-Value and Its Relevance: A Case Study in Italy

2021 ◽  
Author(s):  
Matteo Taroni ◽  
Jiancang Zhuang ◽  
Warner Marzocchi
Keyword(s):  
Spatial Variability ◽  
Bayes Factor ◽  
Likelihood Estimation ◽  
B Value ◽  
Earthquake Forecasting ◽  
Earthquake Catalog ◽  
High Definition ◽  
Novel Approach ◽  
Completeness Magnitude

Abstract The spatial variability of the magnitude–frequency distribution is important to improve earthquake forecasting capabilities at different time scales. Here, we develop a novel approach, based on the weighted maximum-likelihood estimation, to build a spatial model for the b-value parameter of the Gutenberg–Richter law and its uncertainty, also for earthquake catalogs with a time-varying completeness magnitude. Then, we also provide a guideline based on the Bayes factor to measure the importance of the b-value spatial variability with respect to a model having a spatially uniform b-value. Finally, we apply the procedure to a new Italian instrumental earthquake catalog from 1960 to 2019 to investigate the b-value spatial variability over the Italian territory.

scholarly journals Forensic Engineering Analysis of Projectile Thrown from Phantom Vehicle

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Richard Ziernicki ◽  
William Pierce ◽  
Angelos Leiloglou
Keyword(s):  
Lead Author ◽  
Dump Truck ◽  
Engineering Analysis ◽  
High Definition ◽  
Probable Source ◽  
Forensic Engineering ◽  
Testing Case ◽  
Engineering Investigation

This paper presents a case study involving an 8-lb “projectile” piece of concrete thrown from a phantom vehicle into the windshield of a semi-tractor truck, subsequently striking the driver’s (plaintiff’s) head. A witness told the investigating officer that the phantom vehicle was a white-rear dump truck similar to the trucks he’d seen coming in and out of a construction entrance at a nearby park. However, no follow-up investigation was conducted by investigative officers. The lead author was retained by the plaintiff’s attorney to follow up and investigate the witness’ observation of the phantom white-rear dump truck in an attempt to identify the probable source of the concrete projectile, locate the phantom vehicle, reconstruct the incident, and determine the probable cause of the incident. Several forensic engineering techniques were used during the forensic engineering investigation, including evidence analysis, photography, high-definition scanning, photogrammetry, evaluation of the accident timeline, physical testing, case study analysis, projectile analysis, and application of the process of elimination methodology. Through the forensic engineering analysis, the probable source of the projectile concrete was identified, the white-rear dump truck and driver were identified, the accident was reconstructed, and the probable cause of the accident was determined.

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