scholarly journals Design of a VTOL UAV for Anti-poaching Surveillance Missions in the Danube Delta

2022 ◽  
pp. 31-35
Author(s):  
Sorin Andrei Negru ◽  
Marilena Manea ◽  
Gabriel Jiga
Keyword(s):  
Experimental Analysis ◽  
Intelligent System ◽  
Traffic Monitoring ◽  
Danube Delta ◽  
Road Maintenance ◽  
Maintenance Costs ◽  
Vtol Uav ◽  
Low Costs ◽  
Time Required ◽  
Recycled Waste

The main objective of the research paper is the theoretical and experimental analysis of the method proposed for sealing (clogging) cracks in asphalt, by means of a cylindrical bitumen bar, enriched with plastic and rubber granules (obtained from the use of waste), which melts and infuses into the cracked zone by rotation and friction against it. After analyzing the technical characteristics of the sealed area and the time required to apply the bitumen layer, this method can be chosen in the future to the detriment of the expensive operations of partial milling of the cracked wear layer, making possible the repair of cracks by sealing(clogging), using the friction procedure. The research results highlighted the diminution of road maintenance costs using the method of friction, the decrease of cracks repair time, maintaining the initial characteristics of the repaired area, incorporating a waterproofing material (plastic and rubbber granules from recycled waste), keeping the wear layer in good conditions, possibility of embedding an intelligent system of traffic monitoring at low costs etc.

scholarly journals Sealing The Cracks in the Wear Layer of the Road Surface by Friction against a Rotary Active Element

2022 ◽  
pp. 26-30
Author(s):  
Stefan Ionita ◽  
Stefan Velicu
Keyword(s):  
Experimental Analysis ◽  
Active Element ◽  
Intelligent System ◽  
Traffic Monitoring ◽  
Road Maintenance ◽  
Maintenance Costs ◽  
The Road ◽  
Low Costs ◽  
Time Required ◽  
Recycled Waste

The main objective of the research paper is the theoretical and experimental analysis of the method proposed for sealing (clogging) cracks in asphalt, by means of a cylindrical bitumen bar, enriched with plastic and rubber granules (obtained from the use of waste), which melts and infuses into the cracked zone by rotation and friction against it. After analyzing the technical characteristics of the sealed area and the time required to apply the bitumen layer, this method can be chosen in the future to the detriment of the expensive operations of partial milling of the cracked wear layer, making possible the repair of cracks by sealing(clogging), using the friction procedure. The research results highlighted the diminution of road maintenance costs using the method of friction, the decrease of cracks repair time, maintaining the initial characteristics of the repaired area, incorporating a waterproofing material (plastic and rubbber granules from recycled waste), keeping the wear layer in good conditions, possibility of embedding an intelligent system of traffic monitoring at low costs etc.

Saskatchewan Highways and Transportation Reduced Tire Pressure Initiative

1997 ◽  
Vol 1589 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Thomas L. Davies ◽  
Tami F. Wall ◽  
Allan Carpentier
Keyword(s):  
High Speed ◽  
Membrane Surface ◽  
Vehicle Stability ◽  
Road Maintenance ◽  
Long Term Effects ◽  
Tire Pressure ◽  
Reduced Pressure ◽  
Maintenance Costs ◽  
Short And Long Term

After examination of the research carried out by other agencies, Saskatchewan Highways and Transportation (SHT) embarked on an initiative to adapt low tire pressure technologies to the province's needs and environment. The focus of the initiative was to explore several technical questions from SHT's perspective: (a) Can low tire pressures be used to increase truck weights from secondary to primary without increasing road maintenance costs on thin membrane surface roads? (b) What are the short- and long-term effects of tire heating under high-speed/high-deflection constant reduced pressure (CRP) operations in a Saskatchewan environment? (c) What effects do lower tire pressures have on vehicle stability at highway speeds? To date, significant opportunities have been noted on local hauls (less than 30 min loaded at highway speeds) for CRP operation and long primary highway hauls that begin or end in relatively short secondary highway sections that limit vehicle weight allowed for the whole trip for central tire inflation technology. The background and environment for the initiative and the investigations and demonstrations envisioned and undertaken are briefly outlined.

scholarly journals Heuristic decision making in medicine

2012 ◽  
Vol 14 (1) ◽  
pp. 77-89 ◽  
Keyword(s):  
Health Care ◽  
Future Research ◽  
Medical Decisions ◽  
Decision Strategies ◽  
Health Care Settings ◽  
The Common ◽  
Low Costs ◽  
Greedy Methods ◽  
Time Required ◽  
Available Information

Can less information be more helpful when it comes to making medical decisions? Contrary to the common intuition that more information is always better, the use of heuristics can help both physicians and patients to make sound decisions. Heuristics are simple decision strategies that ignore part of the available information, basing decisions on only a few relevant predictors. We discuss: (i) how doctors and patients use heuristics; and (ii) when heuristics outperform information-greedy methods, such as regressions in medical diagnosis. Furthermore, we outline those features of heuristics that make them useful in health care settings. These features include their surprising accuracy, transparency, and wide accessibility, as well as the low costs and little time required to employ them. We close by explaining one of the statistical reasons why heuristics are accurate, and by pointing to psychiatry as one area for future research on heuristics in health care.

Numerical and Experimental Analysis in Adjustment of the VTOL UAV Control Hardware

2018 ◽  
Vol 61 (4) ◽  
pp. 605-612 ◽  
Author(s):  
T. Yu. Gainutdinova ◽  
V. G. Gainutdinov ◽  
N. V. Levshonkov ◽  
A. V. Gainutdinova
Keyword(s):  
Experimental Analysis ◽  
Vtol Uav

MODEL BIAYA PEMELIHARAAN FASILITAS PADA BANDAR UDARA NGURAH RAI BALI

1970 ◽  
Author(s):  
Reni Dewita ◽  
I G. A. Adnyana Putera ◽  
I G. Putu Suparsa
Keyword(s):  
Linear Regression ◽  
Cost Model ◽  
Regression Equation ◽  
Maintenance Cost ◽  
Quality Level ◽  
Road Maintenance ◽  
Linear Regression Equation ◽  
Maintenance Costs ◽  
Facility Maintenance ◽  
The Cost

Facilities in an airport requires maintenance activity in order to achieve excellent quality level and able to support activities at the airport to avoid negative impacts, which is the declining quality of the facility that can lead to lower levels of the productivity carried out in an airport. Maintenance facilities at Bali's Ngurah Rai airport need the maintenance costs planning. To get proper maintenance actions,  the maintenance costs early stages of planning phase needs to develop a model of facility maintenance costs that can provide the maintenance costs estimates quickly and accurately. To produce a maintenance costs model we should identify the maintenance activities that exist at Ngurah Rai airport. Maintenance costs data used is within the last 5 years (2007-2011). Using the Cost Significant Model methode and the linear regression equation it showed that several of the facility maintenace significantly affect the facility maintenance costs in the Ngurah Rai Airport which is the cost of passenger terminal building maintenance (X6), the cost of runway maintenance (X1), the cost of taxiway maintenance (X2), the cost of air conditioning installation maintenance (X14), the cost of road maintenance (X4), the cost of vehicle parking maintenance (X5), and the cost of navigation and communication equipment maintenance (X10). There is 3  linear regression equation model which is 1) Y = 11873745878,77 + 0,993 X1 + 0,826 X2 + 0,334 X4 + 1,181 X6, 2) Y = -698840481,94 + 1,327 X1 + 1,716 X2 + 5,516 X5+ 3,060 X14, and 3) Y = 82110363478,07 + 1,013 X1 - 17,223X5 + 22,406 X10 - 12,035 X14. After doing the Cost Model Factor (CMF) test to the three linear regression equation, the most accurate equation is linear regression equation Y = 82110363478,07 + 1,013 X1 - 17,223X5 + 22,406 X10 - 12,035 X14 that has the average ratio 0.006% of the actual cost, so it is the best facility maintenance cost model at Bali's Ngurah Rai Airport.

Experimental Analysis of Heat Transfer From Ice Rink Floors

Solar Energy ◽  
2006 ◽  
Author(s):  
Jung Mun ◽  
Moncef Krarti
Keyword(s):  
Heat Transfer ◽  
Thermal Resistance ◽  
Thermal Insulation ◽  
Air Temperature ◽  
Experimental Analysis ◽  
Experimental Results ◽  
Water Ice ◽  
Set Up ◽  
Time Required ◽  
The Impact

This paper describes an experimental set-up to evaluate the refrigeration loads for ice rink floors under controlled conditions. The ice-rink set-up was instrumented to measure the temperatures along various locations within the ice-rink floor including the water/ice layer. In addition, the energy used to freeze the water is monitored over the entire charging cycle to evaluate the performance of the ice rink floor for various insulation thermal resistance values (or R-values). Four floor insulation configurations are considered in the experimental analysis of R-0 (no insulation), R-4.2, R-6.7 and R-10 (in IP unit: hr.ft2.°F/Btu). The impact of the air temperature above the ice rink is also evaluated. The experimental results confirm that the addition of the thermal insulation beneath the ice-rink floor reduces the refrigeration load, decreased the time required to freeze the water above the ice rink, and helps maintain lower average ice temperature.

scholarly journals Intelligent System for Vehicles Number Plate Detection and Recognition Using Convolutional Neural Networks

Technologies ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 9
Author(s):  
Nur-A- Alam ◽  
Mominul Ahsan ◽  
Md. Abdul Based ◽  
Julfikar Haider
Keyword(s):  
Traffic Control ◽  
Industrial Revolution ◽  
Intelligent System ◽  
Research Work ◽  
Digital Camera ◽  
Super Resolution ◽  
Traffic Monitoring ◽  
Input Image ◽  
Resolution Image ◽  
On The Road

Vehicles on the road are rising in extensive numbers, particularly in proportion to the industrial revolution and growing economy. The significant use of vehicles has increased the probability of traffic rules violation, causing unexpected accidents, and triggering traffic crimes. In order to overcome these problems, an intelligent traffic monitoring system is required. The intelligent system can play a vital role in traffic control through the number plate detection of the vehicles. In this research work, a system is developed for detecting and recognizing of vehicle number plates using a convolutional neural network (CNN), a deep learning technique. This system comprises of two parts: number plate detection and number plate recognition. In the detection part, a vehicle’s image is captured through a digital camera. Then the system segments the number plate region from the image frame. After extracting the number plate region, a super resolution method is applied to convert the low-resolution image into a high-resolution image. The super resolution technique is used with the convolutional layer of CNN to reconstruct the pixel quality of the input image. Each character of the number plate is segmented using a bounding box method. In the recognition part, features are extracted and classified using the CNN technique. The novelty of this research is the development of an intelligent system employing CNN to recognize number plates, which have less resolution, and are written in the Bengali language.

An investigation of the effects of lorry suspension performance on road maintenance costs

2007 ◽  
Vol 221 (11) ◽  
pp. 1265-1277 ◽  
Author(s):  
M Costanzi ◽  
D Cebon
Keyword(s):  
Performance Test ◽  
Dynamic Performance ◽  
Permanent Deformation ◽  
Surface Profile ◽  
Road Surface ◽  
Leaf Spring ◽  
Road Maintenance ◽  
Maintenance Costs ◽  
Vehicle Fleet ◽  
Maintenance Intervention

A mathematical model of the interaction between a fleet of heavy vehicles and a spraysealed road surface is developed and validated using field performance data. Key features of the model include: (a) modelling the dynamic performance of the vehicle fleet using an ensemble of ‘quarter car’ vehicle models; (b) careful accounting for the ‘spatial repeatability’ of tyre forces; (c) use of accelerated pavement performance test data to model the evolution of the road surface profile; (d) surface maintenance intervention based on permanent deformation (rutting), potholing and excessive surface roughness. The model is used to predict long-term road maintenance intervention costs and to compare the predicted road maintenance costs for various suspension scenarios in the vehicle fleet. The simulation results indicate that conversion of the heavy vehicle fleet from conventional leaf spring suspensions to ‘road-friendly’ suspensions would results in a reduction in road maintenance costs per tonne-km of 14 per cent. Increasing the freight load by 3.0 tonnes per vehicle would reduce this benefit to approximately 1 per cent. If the fleet was to have 50 per cent poorly maintained shock absorbers, the simulations show an increase in road maintenance expenditures per tonne-km: about 5 per cent higher than conventional suspensions at the lower weights and 21 per cent higher at the higher weights.

scholarly journals Use of Unmanned Aerial Vehicles (UAVs) and Photogrammetry to Obtain the International Roughness Index (IRI) on Roads

2020 ◽  
Vol 10 (24) ◽  
pp. 8788
Author(s):  
Matías Prosser-Contreras ◽  
Edison Atencio ◽  
Felipe Muñoz La Rivera ◽  
Rodrigo F. Herrera
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Negative Impact ◽  
Three Dimensional ◽  
Limiting Factor ◽  
Road Maintenance ◽  
International Roughness Index ◽  
Aerial Vehicles ◽  
Roughness Index ◽  
Road Inspection ◽  
Time Required

Road inspection and maintenance require a large amount of data collection, where the main limiting factor is the time required to cover long stretches of road, having a negative impact on the optimization of the work. This article aims to identify modern tools for road maintenance and analysis. To carry out the research, recent methodologies are used to guide the work in different stages to adequately justify the processes involved. Using unmanned aerial vehicles (UAVs), cameras, and GPS, three-dimensional virtual models are reconstructed, which are useful for extracting the necessary information since they allow for accurate replication of the captured. In this way, it is possible to obtain longitudinal profiles associated with the road, and with it, the international roughness index (IRI) is calculated, which gives results within 0.1 (m/km) of the certified official results, which shows its potential use and development.

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