Overseas testing of a multisensor landmine detection system: results and lessons learned

2009 ◽  
Author(s):  
Joe G. Keranen ◽  
Zeke Topolosky
Keyword(s):  
Detection System ◽  
Lessons Learned ◽  
Landmine Detection

scholarly journals Integer arithmetic approximation of the hog algorithm used for pedestrian detection

2017 ◽  
Vol 14 (2) ◽  
pp. 329-346 ◽  
Author(s):  
Srdjan Sladojevic ◽  
Andras Anderla ◽  
Dubravko Culibrk ◽  
Darko Stefanovic ◽  
Bojan Lalic
Keyword(s):  
Classification Accuracy ◽  
System Performance ◽  
Detection System ◽  
Pedestrian Detection ◽  
Lessons Learned ◽  
People Detection ◽  
Algorithm Performance ◽  
Integer Arithmetic ◽  
Point Arithmetic ◽  
Angle Calculation

This paper presents the results of a study of the effects of integer (fixed-point) arithmetic implementation on classification accuracy of a popular open-source people detection system based on Histogram of Oriented Gradients. It is investigated how the system performance deviates from the reference algorithm performance as integer arithmetic is introduced with different bit-width in several critical parts of the system. In performed experiments, the effects of different bit-width integer arithmetic implementation for four key operations were separately considered: HoG descriptor magnitude calculation, HoG descriptor angle calculation, normalization and SVM classification. It is found that a 13-bit representation of variables is more than sufficient to accurately implement this system in integer arithmetic. The experiments in the paper are conducted for pedestrian detection and the methodology and the lessons learned from this study allow generalization of conclusions to a broader class of applications.

Audible and visual representations of the signals from a seismic landmine detection system

2002 ◽  
Vol 112 (5) ◽  
pp. 2325-2325
Author(s):  
Waymond R. Scott ◽  
Gregg D. Larson ◽  
James S. Martin
Keyword(s):  
Detection System ◽  
Visual Representations ◽  
Landmine Detection

scholarly journals Lessons learned from the development of an affordable fall detection system for mHealth

2015 ◽  
Vol 1 (1) ◽  
pp. 59
Author(s):  
Miguel Angel Estudillo Valderrama ◽  
Laura M Roa Romero ◽  
Luis Javier Reina Tosina ◽  
Gerardo Barbarov Rostan ◽  
David Naranjo Hernandez
Keyword(s):  
Software Development ◽  
Mobile Health ◽  
Detection System ◽  
Fall Detection ◽  
Embedded Software ◽  
The State ◽  
Lessons Learned ◽  
Iterative Design ◽  
State Of Art ◽  
Industrial Prototype

This paper discusses some relevant methodological and implementation experiences acquired during the design and development of an embedded Fall Detection System (FDS), which can be of help in order to develop efficient and safe biomedical software for mobile Health (mHealth). For this purpose, an analysis of concepts like portability and iterative design, as well as some concerns about risks and safety involved, is provided in order to address some of the current challenges in embedded software, regarding the state-of-art of software development standards and mHealth technologies. This analysis is later evaluated for a custom pre-industrial prototype of the FDS, as an example of the feasibility of the approach followed. The results obtained show that a convenient methodological process can help to optimize available resources so as to provide affordable mHealth solutions.

scholarly journals Experimental model for a seismic landmine detection system

2001 ◽  
Vol 39 (6) ◽  
pp. 1155-1164 ◽  
Author(s):  
W.R. Scott ◽  
J.S. Martin ◽  
G.D. Larison
Keyword(s):  
Experimental Model ◽  
Detection System ◽  
Landmine Detection

Successful Wellbore Pressure Management Using Intelligent MPD and Continuous Circulation System on an HPHT Well in Vietnam

2021 ◽  
Author(s):  
Bao Ta Quoc ◽  
Harpreet Kaur Dalgit Singh ◽  
Tuan Nguyen Le Quang ◽  
Dien Nguyen Van ◽  
Essam Sammat
Keyword(s):  
Detection System ◽  
Lessons Learned ◽  
Circulation System ◽  
Well Control ◽  
Fracture Pressure ◽  
High Pressure High Temperature ◽  
Managed Pressure Drilling ◽  
Increased Risk ◽  
Wellbore Pressure ◽  
Exploration Well

Abstract A managed pressure drilling (MPD) and early influx detection system is gaining worldwide acceptance as an enabling technology for drilling wells with challenges that can lead to tremendous nonproductive time (NPT), significant unplanned costs, and increased risk exposure. MPD counteracts the high cost of these wells by delivering significant savings when eliminating fluid losses or well control events that cause NPT. MPD technology has proven that is used to not only reduce NPT but also enable access to reserves previously considered un-drillable. In this case history, MPD helped to reach reserves that could not be reached in the first well. Client planned to drill the well A, which is its second offshore exploration well. Early on in 2019, the campaign encountered significant problems because of high temperatures and a narrow pore-pressure/fracture-pressure (PP/FP) gradient window. Additionally, using conventional drilling methods in offset wells led to problems relating to kicks, loss scenarios, and stuck pipe. Before drilling the second exploration well, the relevant parties considered that the first well-presented multiple drilling issues, and they drew from past success. The latter job had ended with reaching all the well targets despite high-pressure/high-temperature (HP/HT) conditions using a continuous circulating device in conjunction with an MPD system. Therefore, this combination of technologies was chosen to drill the well A. The operator used the MPD system, from the start when drilling the 14 3/4-in × 16-in. hole section to the end when drilling the 8 1/2-in. hole section, in offshore Vietnam. Applying MPD technology on this well resulted in many benefits, including the main benefit of always controlling the bottomhole pressure through the challenging zones. MPD also helped to maintain the equivalent circulating destiny (ECD) and equivalent static density (ESD) during drilling, connections, and a logging operation to mitigate the risk of any gas breaking out at the surface and to drill the well to the desired target depth. This paper focuses on using MPD technology in conjunction with the continuous circulation system, in offshore Vietnam. It goes into detail by describing the experience and providing some of the lessons learned.

Unerwartete Unternehmensinsolvenz trotz testiertem Risikomanagement? – Lessons Learned aus der Insolvenz der Gerry Weber International AG

2020 ◽  
Vol 61 (3) ◽  
pp. 139-154
Author(s):  
Werner Gleißner ◽  
Kay H. Hofmann
Keyword(s):  
Annual Report ◽  
Detection System ◽  
Lessons Learned ◽  
Legal Requirements ◽  
External Auditors ◽  
Detection Systems ◽  
Risk Detection ◽  
Early Risk ◽  
Management Procedures ◽  
Risk Aggregation

Summary Studies show that the implemented and certified early risk detection systems in practice are often unable to identify developments that could jeopardize a company’s existence. This is due to methodological weaknesses, e.g. insufficient consideration of the liquidity effect of risks, the lack of analysis of extreme risks and, in particular, the absence of adequate risk aggregation that considers interdependencies and hence combination effects of risks. In many recent insolvencies, among them the here investigated case of Gerry Weber International AG, it is easy to see that the early risk detection system, as explained in the Annual Report, has not fulfilled the legal requirements. In order to avoid such „unexpected insolvencies“, it is necessary to implement advanced risk management procedures and pursue audits that are more rigorous. The article at hand develops a concise but comprehensive assessment scheme that may not only be easily applied within companies but also by external auditors. Zusammenfassung Die meisten börsennotierten Gesellschaften haben ein Risikofrüherkennungssystem, das vom Abschlussprüfer ohne den Verweis auf schwerwiegende Mängel testiert wird. Tatsächlich zeigen Studien, dass die in der Praxis implementierten Systeme häufig ungeeignet sind, um an sich erkennbare bestandsgefährdende Entwicklungen zu identifizieren. Dies liegt an methodischen Schwächen, z. B. an einer fehlenden Betrachtung der Liquiditätswirkung von Risiken, einer vernachlässigten Analyse von Extremrisiken und insb. am Fehlen einer Risikoaggregation, die auch Kombinationseffekte berücksichtigt. Bei Insolvenzen, wie hier im Beispiel von Gerry Weber, lässt sich bei Betrachtung des dokumentierten Risikomanagementsystems erkennen, dass die gesetzlichen Anforderungen nicht erfüllt wurden. Um solche „überraschenden Insolvenzen“ zu vermeiden, ist es erforderlich, bessere Verfahren zu implementieren und durch Prüfer testieren zu lassen, was bisher nicht konsequent geschieht. Der Beitrag schlägt ein einfaches aber umfassendes Prüfschema für Risikofrüherkennungssysteme vor, das sowohl intern als auch von externen Prüfern verwendet werden kann.

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