Real-Time Process Quality Monitoring Using Wireless Sensor-Embedded Rotary Tools for Fastening Operations

2007 ◽  
Author(s):  
Deepak T. Mohan ◽  
Jeffrey Birt ◽  
Can Saygin ◽  
Jaganathan Sarangapani
Keyword(s):  
Real Time ◽  
Lead Time ◽  
Value Added ◽  
Cost Effective ◽  
Base Station ◽  
Embedded Sensors ◽  
Optical Encoder ◽  
Effective Manner ◽  
Rotary Type

Fastening operations are extensively used in the aerospace industry and constitute for more than a quarter of the total cost. Inspection of fasteners is another factor that adds cost and complexity to the overall process. Inspection is usually carried out on a sampling-basis as a stand-alone process after the fastening process is completed. Lack of capability to inspect all fasteners in a cost effective manner and the need to remove non-value added activities, such as inspection by itself, in order to reduce the manufacturing lead time have been the motivation behind this study. This paper presents a novel diagnostics scheme based on Mahalanobis-Taguchi System (MTS) for monitoring the quality of rotary-type fastening operations in real-time. This approach encompasses (1) integrating a torque sensor, a pressure sensor, and an optical encoder on a hand-held rotary-type fastening tool; (2) obtaining process parameters via the embedded sensors and generating process signatures in real-time; and (3) detecting anomalies on the tool using a wireless mote that communicates the decision with a base station. The anomalies investigated in this study are the grip length variations as under grip and normal grip, and presence of re-used fasteners. The proposed scheme has been implemented on prototype rotary tool for bolt-nut type of fasteners and tested under a variety of experimental settings. The experimental results have shown that the proposed approach is successful, with an accuracy of over 95% in detecting grip lengths of fasteners in real-time during the process.

scholarly journals Development of an Automatic Image Cropping and Feature Extraction System for Real-Time Warping Monitoring in 3D Printing

2021 ◽  
Author(s):  
Jiarui Xie
Keyword(s):  
Real Time ◽  
Detection System ◽  
Region Of Interest ◽  
Cost Effective ◽  
Time Warping ◽  
Time Data ◽  
Fused Filament Fabrication ◽  
System A ◽  
Effective Manner

Fused Filament Fabrication (FFF) is an additive manufacturing technology that can produce complicated structures in a simple-to-use and cost-effective manner. Although promising, the technology is prone to defects, e.g. warping, compromising the quality of the manufactured component. To avoid the adverse effects caused by warping, this thesis utilizes deep-learning algorithms to develop a warping detection system using Convolutional Neural Networks (CNN). To create such a system, a real-time data acquisition and analysis pipeline is laid out. The system is responsible for capturing a snapshot of the print layer-bylayer and simultaneously extracting the corners of the component. The extracted region-of-interest is then passed through a CNN outputting the probability of a corner being warped. If a warp is detected, a signal is sent to pause the print, thereby creating a closed-loop monitoring system. The underlying model is tested on a real-time manufacturing environment yielding a mean accuracy of 99.21%.

scholarly journals Quality of Experience in Cyber-Physical Social Systems Based on Reinforcement Learning and Game Theory

2018 ◽  
Vol 10 (11) ◽  
pp. 108 ◽  
Author(s):  
Eirini Tsiropoulou ◽  
George Kousis ◽  
Athina Thanou ◽  
Ioanna Lykourentzou ◽  
Symeon Papavassiliou
Keyword(s):  
Game Theory ◽  
Reinforcement Learning ◽  
Time Management ◽  
Quality Of Experience ◽  
Social Systems ◽  
Cost Effective ◽  
Superior Performance ◽  
Operational Effectiveness ◽  
Effective Manner

This paper addresses the problem of museum visitors’ Quality of Experience (QoE) optimization by viewing and treating the museum environment as a cyber-physical social system. To achieve this goal, we harness visitors’ internal ability to intelligently sense their environment and make choices that improve their QoE in terms of which the museum touring option is the best for them and how much time to spend on their visit. We model the museum setting as a distributed non-cooperative game where visitors selfishly maximize their own QoE. In this setting, we formulate the problem of Recommendation Selection and Visiting Time Management (RSVTM) and propose a two-stage distributed algorithm based on game theory and reinforcement learning, which learns from visitor behavior to make on-the-fly recommendation selections that maximize visitor QoE. The proposed framework enables autonomic visitor-centric management in a personalized manner and enables visitors themselves to decide on the best visiting strategies. Experimental results evaluating the performance of the proposed RSVTM algorithm under realistic simulation conditions indicate the high operational effectiveness and superior performance when compared to other recommendation approaches. Our results constitute a practical alternative for museums and exhibition spaces meant to enhance visitor QoE in a flexible, efficient, and cost-effective manner.

Improving Quality of Experience of Subscribers through Post Deployment Network Planning in UMTS Cellular Networks

2012 ◽  
Vol 8 (3) ◽  
pp. 1-27
Author(s):  
Samir Kumar Sadhukhan ◽  
Swarup Mandal
Keyword(s):  
User Experience ◽  
Cellular Network ◽  
Quality Of Experience ◽  
Service Management ◽  
Cost Effective ◽  
Management Problem ◽  
Network Service ◽  
Heuristic Techniques ◽  
Effective Manner

It is an established fact that cost of churning is a common concern for being profitable in the cellular network service provider’s space. Service providers can view this problem as a service management problem and can have a solution to enhance the stickiness of subscribers by managing the quality of user experience. Quality of Experience (QoE) is important in contrast to Quality of Service (QoS). Three basic components of service management are stage, prop, and user experience. In this cellular network service context, network infrastructure acts as prop. Prop needs to be flexible to enable the personalization in providing the service. In reality the major challenge for a service provider is keep the fitment between prop and the dynamic changes in subscriber profile in a cost effective manner. To define the problem more precisely, the authors take the conventional UMTS cellular network. Here, operators have considered single-homing of RNCs to MSCs/SGSNs (i.e., many-to-one mapping) with an objective to generate service at lower cost over a fixed period of time. However, a single-homing network does not remain cost-effective and flexible anymore when subscribers later begin to show specific inter-MSC/SGSN mobility patterns over time. This necessitates post-deployment topological extension of the network in which some specific RNCs are connected to two MSCs/SGSNs via direct links resulting in a more complex many-to-two mapping structure in parts of the network. The authors formulate the scenario as a combinatorial optimization problem and solve the NP-Complete problem using three meta-heuristic techniques, namely Simulated Annealing (SA), Tabu search (TS), and Ant colony optimization (ACO). They then compare these techniques with a novel optimal heuristic search method that the authors propose typically to solve the problem. The comparative results reveal that the search-based method is more efficient than meta-heuristic techniques in finding optimal solutions quickly.

Efficacy of slow-release system for improving the quality of water in streams affected by mining activities

2020 ◽  
Author(s):  
Eung Seok Lee ◽  
Ryan Wolbert
Keyword(s):  
Mine Drainage ◽  
Slow Release ◽  
Cost Effective ◽  
Ecological Impacts ◽  
Polluted Water ◽  
Narrow Channels ◽  
Quality Of Water ◽  
Cost Effective Approach ◽  
Effective Manner

<p>Acid mine drainage (AMD) is considered as one of the most prevalent environmental problems worldwide and remediation of AMD-affected streams remains a major challenge due to the large affected areas, large volume of polluted water, poor accessibility, and lack of financial supports. Advanced oxidation processes (AOPs) have been widely investigated as potential remedial options for contaminated water bodies of variety of settings, such as groundwater and waste discharges. This study presents a novel cost-effective approach for utilizing AOPs on improving quality of AMD-affected streams. Slow-release cylinders and pellets were created using polymeric binder and reagent salts that release strong oxidant and alkalinity upon dissolution in water. Results of column tests demonstrated that release durations were over 29 days and up to 100% iron removal was achieved within 20 minutes. Field-scale slow-release forms were manufactured and applied to an AMD site in southeast Ohio, USA for a 29-day demonstration study. Narrow channels were constructed for installation of slow-release forms and characterization of quality and flow of mine seeps and AMD stream during low subsurface flow periods. Results of field investigations suggest that the slow-release forms can be used to rapidly remove metals from AMD, as well as improve water parameters such as pH and minimize ecological impacts of remediation within the system in cost-effective manner.</p><p> </p>

scholarly journals An Improved In Vitro Pyrogen Test To Detect The Presence of Endotoxin Containing Bacteria Using Limulus Amoebocyte Lysate Assay From Pharmaceutical Raw Product

1970 ◽  
Vol 1 (1) ◽  
pp. 76-79
Author(s):  
Tanvir Bashar ◽  
Khondokar Mahzebin Shurovi ◽  
Sanjida Dilshad
Keyword(s):  
Pathogenic Bacteria ◽  
Raw Materials ◽  
Cost Effective ◽  
Drug Preparation ◽  
Effective Manner ◽  
Key Word ◽  
Pseudomonas Species ◽  
Lal Assay

Most of the environmental organism possess endotoxin which presence indicates the organisms are much lethal and for the purposes bacteriological quality of pharmaceutical raw products is much important. In these current study, 2 raw materials out of 10 were found to containing pathogenic bacteria Escherichia coli and Pseudomonas species in the culture medium, that indicates the raw materials were contaminated with the deadly organism. These two raw materials checked for the presence of Endotoxin and both provided positive gel clot by Limulas amoebocyte lysate (LAL) assay. Quality maintenance and assurance is the essential need of Drug preparation in pharmaceutical sector. The result ensure that Pharmaceutical industry should need to follow GMP and HACCP to minimize the contamination for improving the biological safety of the product in a cost-effective manner. Key Word: Limulas amoebocyte lysate (LAL) assay, Gram negative bacteria, endotoxin. doi:10.3329/sjps.v1i1.1812    S. J. Pharm. Sci. 1(1&2): 76-79

scholarly journals Does arthroscopic subacromial decompression improve quality of life

2015 ◽  
Vol 97 (3) ◽  
pp. 221-223 ◽  
Author(s):  
U Butt ◽  
A Whiteman ◽  
J Wilson ◽  
E Paul ◽  
B Roy
Keyword(s):  
Quality Of Life ◽  
Cost Effective ◽  
Decompression Surgery ◽  
Subacromial Decompression ◽  
Oxford Shoulder Score ◽  
Effective Manner ◽  
The Mean ◽  
Arthroscopic Subacromial Decompression ◽  
Shoulder Score

Introduction There has been a significant rise in the volume of subacromial decompression surgery performed in the UK. This study aimed to determine whether arthroscopic subacromial decompression improves health related quality of life in a cost effective manner. Methods Patients undergoing arthroscopic subacromial decompression surgery for impingement were enrolled between 2012 and 2014. The Oxford shoulder score and the EQ-5D™ instruments were completed prior to and following surgery. A cost–utility analysis was performed. Results Eighty-three patients were eligible for the study with a mean follow-up duration of 15 months (range: 4–27 months). The mean Oxford shoulder score improved by 13 points (95% confidence interval [CI]: 11–15 points). The mean health utility gain extrapolated from the EQ-5D™ questionnaire improved by 0.23 (95% CI: 0.16–0.30), translating to a minimum cost per QALY of £5,683. Conclusions Subacromial decompression leads to significant improvement in function and quality of life in a cost effective manner. This provides justification for its ongoing practice by appropriately trained shoulder surgeons in correctly selected patients.

scholarly journals Development of a real-time framework for farm monitoring using drone technology

2020 ◽  
Vol 9 (4) ◽  
pp. 244
Author(s):  
Adekunle T. Oyelami ◽  
Adedayo S. Akinade ◽  
Kingsley C. Obianefo
Keyword(s):  
Real Time ◽  
Flight Control ◽  
Video Transmission ◽  
Cost Effective ◽  
Base Station ◽  
Alarm System ◽  
Tracking Systems ◽  
Live Feed ◽  
Real Time Image ◽  
Time Image

This work developed a cost-effective framework for agriculturists to regularly monitor their crops against intruding rodents and other security concerns using modern drone technology through configuration and deployment of an autonomous UAV which also functions as a remotely piloted vehicle. This was done by configuring a quadcopter capable of causing a disturbance when a rodent is observed through an inbuilt alarm system whose sound is amplified to be loud enough to cause the animals to leave the farm area. A framework for real-time image and live video transmission from the farm to a designated remote base station was developed. This was achieved through programming codes that configured the drone to operate an intelligent alarm and object tracking systems which enables a live feed from the UAV using Arduino IDE and Mission Planner for autonomous flight control. The requisite algorithms were developed using the framework of tracking, learning and detection (TLD) in the OpenCV software. The drone movement is equally controlled remotely over a Wi-Fi network using an ESP8266 Wi-Fi module for redirection and controlling of the drone movement to monitor specific locations.

scholarly journals A Quantitative Research on The Effectiveness of The Implementation of Supply Chain Management, Logistics & Marketing Function - The Greek Paradigm

2019 ◽  
Vol 4 (6) ◽  
Author(s):  
Joel Chiadikobi Nwaubani ◽  
Artemis Tsianta ◽  
Magdalini Zelka
Keyword(s):  
Customer Service ◽  
Quantitative Research ◽  
Cost Effective ◽  
Trade Flows ◽  
Sustainable Competitive Advantage ◽  
Marketing Function ◽  
Effective Manner ◽  
Geographical Position ◽  
Quality Of Products

In today's era of high competition and globalisation, it is an indisputable fact that customers are more demanding not only in the quality of products but also on the services provided. Consequently, the pressure on companies to discover new ways to create and provide quality to their customers has increased much more. More specifically, customer service has become a key tool for diversification, as culture and customer demands are constantly increasing. Greece stands on a strategic crossroad for the development of transportation in the greater region of Europe, Asia and Africa. Its geographical position renders it highly attractive for investments in logistics and transport to take advantage of these increasing trade flows in an efficient and cost-effective manner. In this paper, we carried out a quantitative research in Greece using a questionnaire to analyse the importance and effectiveness of the application of logistics in businesses with regard to customer service, which serve as a critical source of sustainable competitive advantage. By applying this method, a business will have its customers satisfied, thereby giving them the motivation to remain loyal and faithful to their purchasing practices within the company.

scholarly journals ZigBee-Based Telemetry System

2010 ◽  
Vol 7 (2) ◽  
pp. 32 ◽  
Author(s):  
L. Khriji ◽  
F. Touati ◽  
N. Hamza
Keyword(s):  
Real Time ◽  
Mobile Device ◽  
Low Cost ◽  
Base Station ◽  
The Body ◽  
Telemetry System ◽  
Real Time Monitoring ◽  
Digital Convergence ◽  
Machine Interface

 Nowadays, there is a significant improvement in technology regarding healthcare. Real-time monitoring systems improve the quality of life of patients as well as the performance of hospitals and healthcare centers. In this paper, we present an implementation of a designed framework of a telemetry system using ZigBee technology for automatic and real-time monitoring of Biomedical signals. These signals are collected and processed using 2-tiered subsystems. The first subsystem is the mobile device which is carried on the body and runs a number of biosensors. The second subsystem performs further processing by a local base station using the raw data which is transmitted on-request by the mobile device. The processed data as well as its analysis are then continuously monitored and diagnosed through a human-machine interface. The system should possess low power consumption, low cost and advanced configuration possibilities. This paper accelerates the digital convergence age through continual research and development of technologies related to healthcare. 

scholarly journals Quality of Services Based on Intelligent IoT WLAN MAC Protocol Dynamic Real-Time Applications in Smart Cities

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Abbas Alnazir ◽  
Rania A. Mokhtar ◽  
Hesham Alhumyani ◽  
Elmustafa Sayed Ali ◽  
Rashid A. Saeed ◽  
...  
Keyword(s):  
Real Time ◽  
Mobility Management ◽  
Smart Cities ◽  
Total Duration ◽  
Base Station ◽  
Media Access Control ◽  
Distributed Coordination ◽  
Real Time Applications ◽  
Coordination Function

The future directions and challenges for 6G-enabled wireless communication for IoT applications are mainly focused on quality of service (QoS). The selection criteria of mobility management (MM) protocol are mainly the total duration of the delay and packet loss rate during the MM procedure. This is called intelligent handover (IH) to designate a relay with a minimum delay. To solve the problem of handover, media access control (MAC) protocols are used to provide an intelligent protocol for QoS in real-time application in mobility. Moreover, changing the parameter to find the best protocol for mobile stations in WLAN is a good choice. This paper proposed a new QoS structure for the point coordination function that is based on a new intelligent enhanced distribution coordination function that suites with dynamic real-time applications and services. The paper addresses the distributed coordination function (DCF) with QoS-based intelligent mobility management in stations and other scenarios with enhanced distribution coordination function (EDCF) to find the result of throughput, retransmission attempts, delay, and data droop. In this paper, the remote topology comprises a few remote stations and one base station within the remote LAN. All remote stations are found that each station can distinguish a transmission from any other station, and there is portability within the proposed intelligent framework.

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