94 research outputs found
Controlling Steering Angle for Cooperative Self-driving Vehicles utilizing CNN and LSTM-based Deep Networks
A fundamental challenge in autonomous vehicles is adjusting the steering
angle at different road conditions. Recent state-of-the-art solutions
addressing this challenge include deep learning techniques as they provide
end-to-end solution to predict steering angles directly from the raw input
images with higher accuracy. Most of these works ignore the temporal
dependencies between the image frames. In this paper, we tackle the problem of
utilizing multiple sets of images shared between two autonomous vehicles to
improve the accuracy of controlling the steering angle by considering the
temporal dependencies between the image frames. This problem has not been
studied in the literature widely. We present and study a new deep architecture
to predict the steering angle automatically by using Long-Short-Term-Memory
(LSTM) in our deep architecture. Our deep architecture is an end-to-end network
that utilizes CNN, LSTM and fully connected (FC) layers and it uses both
present and futures images (shared by a vehicle ahead via Vehicle-to-Vehicle
(V2V) communication) as input to control the steering angle. Our model
demonstrates the lowest error when compared to the other existing approaches in
the literature.Comment: Accepted in IV 2019, 6 pages, 9 figure
Performance Analysis of V2I Zone Activation and Scalability for C-V2X Transactional Services
Cellular-V2X (C-V2X) enables communication between vehicles and other
transportation entities over the 5.9GHz spectrum. C-V2X utilizes direct
communication mode for safety packet broadcasts (through the usage of periodic
basic safety messages) while leaving sufficient room in the resource pool for
advanced service applications. While many such ITS applications are under
development, it is crucial to identify and optimize the relevant network
parameters. In this paper, we envision an infrastructure-assisted transaction
procedure entirely carried out by C-V2X, and we optimize it in terms of the
service parameters. To achieve the service utility of a transaction class, two
C-V2X entities require a successive exchange of multiple messages. With this
notion, our proposed application prototype can be generalized for any vehicular
service to establish connections on-the-fly. We identify suitable activation
zones for vehicles and assess their impact on service efficiency. The results
show a variety of potential service and parameter settings that can be
appropriate for different use-cases, laying the foundation for subsequent
studies
Control-aware Communication for Cooperative Adaptive Cruise Control
Utilizing vehicle-to-everything (V2X) communication technologies, vehicle
platooning systems are expected to realize a new paradigm of cooperative
driving with higher levels of traffic safety and efficiency. Connected and
Autonomous Vehicles (CAVs) need to have proper awareness of the traffic
context. However, as the quantity of interconnected entities grows, the expense
of communication will become a significant factor. As a result, the cooperative
platoon's performance will be influenced by the communication strategy. While
maintaining desired levels of performance, periodic communication can be
relaxed to more flexible aperiodic or event-triggered implementations. In this
paper, we propose a control-aware communication solution for vehicle platoons.
The method uses a fully distributed control-aware communication strategy,
attempting to decrease the usage of communication resources while still
preserving the desired closed-loop performance characteristics. We then
leverage Model-Based Communication (MBC) to improve cooperative vehicle
perception in non-ideal communication and propose a solution that combines
control-aware communication with MBC for cooperative control of vehicle
platoons. Our approach achieves a significant reduction in the average
communication rate () while only slightly reducing control performance
(e.g., less than speed deviation). Through extensive simulations, we
demonstrate the benefits of combined control-aware communication with MBC for
cooperative control of vehicle platoons.Comment: arXiv admin note: text overlap with arXiv:2203.1577
Optimal Design of Multi-Span Pitched Roof Frames with Tapered Members
Many industrial buildings require large spans and high height, and the use of a frame with inclined roofs with non-prismatic elements can reduce the usage of steel. Pitched roof frame with single spans are optimized using different meta-heuristic algorithms. In this paper, the optimal design of industrial frames with two and three spans under gravity and lateral loads is performed. Five efficient and widely accepted optimization algorithms are used to optimize each frame. The convergence histories and design results of these algorithms are compared and the most suitable algorithm is determined. In each frame, the effect of increasing the apex height is evaluated on the optimal weight and the best angle is determined for optimum weight
Albumin: Creatinine Ratio during long term Diabetes Mellitus in the Assessment of early Nephropathy in Sudanese Population
Background: Diabetic nephropathy is one of the major causes of chronic renal failure. Microalbuminuria (MAU) has been recognized as an independent and reliable predictor for future development of overt proteinuria in diabetic patients.Objectives: This descriptive cross-sectional study was carried during the period of January-April 2012, in Omdurman Teaching Hospital, to determine Microalbuminuria creatinine ratio, in long term Diabetic patients.Materials and Methods: Immunoturbidmetric method was used to asses’ microalbuminuria in 50 cases (50%) and 50 controls (50%). Ordinary chemical method (Jaffe reaction) was used for the determination of creatinine for both the groups.Results: Microalbuminuria in Diabetic patients showed an increase when compared with the control group with P value 0.000. Similarly creatinine also showed an increase in diabetic patients.Conclusion: It was concluded and is in further affirmation of the previous studies that microalbuminuria should be used as an early indicator for Diabetic Nephropathy. Further studies with 24 hour urine sample are recommended for assessment of Microalbuminuria in long term Diabetic patients, provided that the patients are on a normal diet with regular treatment for diabetes.Key words: Microalbuminuria, Creatinine, Diabetes mellitus, Nephropathy
PKM Online Classroom Management Training Based on Google Classroom and Edpuzzle Applications at SMP Negeri 1 Probolinggo
The purpose of this service activity is to improve the ability of teachers at SMP Negeri 1 Probolinggo in managing online classes by providing online class management training based on the Google Classroom and Edpuzzleapplications. The method of implementing this activity is lecture, practice, and discussions. Lectures were conducted to deliver material on the stages of classroom management using Google Classroom and using videos on Edpuzzle. The participants of this activity were all teachers of SMP Negeri 1 Probolinggo, a total of 40 people. For online class management, participants were given training in class management and grades, using forums, and making materials and quizzes. For the use of videos as learning materials, participants were trained in choosing videos, editing videos, inserting messages and questions, and multiple choices. The results of this service activity are as many as72.5% of participants have been able to manage online classes and integrate with Edpuzzle. Partners have also agreed to use Google Classroom's added puzzle for learning for the 2021/2022 academic year
Potential health and economic impacts of dexamethasone treatment for patients with COVID-19
Acknowledgements We thank all members of the COVID-19 International Modelling Consortium and their collaborative partners. This work was supported by the COVID-19 Research Response Fund, managed by the Medical Sciences Division, University of Oxford. L.J.W. is supported by the Li Ka Shing Foundation. R.A. acknowledges funding from the Bill and Melinda Gates Foundation (OPP1193472).Peer reviewedPublisher PD
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