On the Road to DiPOSH: Adventures in High-Performance OpenSHMEM

2020 ◽  
pp. 250-260
Author(s):  
Camille Coti ◽  
Allen D. Malony
Keyword(s):  
High Performance ◽  
The Road ◽  
On The Road

scholarly journals Accurate whole-night sleep monitoring with dry-contact ear-EEG

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kaare B. Mikkelsen ◽  
Yousef R. Tabar ◽  
Simon L. Kappel ◽  
Christian B. Christensen ◽  
Hans O. Toft ◽  
...  
Keyword(s):  
High Performance ◽  
Well Being ◽  
Extensive Study ◽  
Sleep Monitoring ◽  
The Road ◽  
Scalp Eeg ◽  
Dry Contact ◽  
Negative Effect ◽  
On The Road

AbstractSleep is a key phenomenon to both understanding, diagnosing and treatment of many illnesses, as well as for studying health and well being in general. Today, the only widely accepted method for clinically monitoring sleep is the polysomnography (PSG), which is, however, both expensive to perform and influences the sleep. This has led to investigations into light weight electroencephalography (EEG) alternatives. However, there has been a substantial performance gap between proposed alternatives and PSG. Here we show results from an extensive study of 80 full night recordings of healthy participants wearing both PSG equipment and ear-EEG. We obtain automatic sleep scoring with an accuracy close to that achieved by manual scoring of scalp EEG (the current gold standard), using only ear-EEG as input, attaining an average Cohen’s kappa of 0.73. In addition, this high performance is present for all 20 subjects. Finally, 19/20 subjects found that the ear-EEG had little to no negative effect on their sleep, and subjects were generally able to apply the equipment without supervision. This finding marks a turning point on the road to clinical long term sleep monitoring: the question should no longer be whether ear-EEG could ever be used for clinical home sleep monitoring, but rather when it will be.

Road Vehicle Information Collection System Based on Distributed Fiber Optics Sensor

2014 ◽  
Vol 1030-1032 ◽  
pp. 2105-2109 ◽  
Author(s):  
Li Li Feng ◽  
Yun Tao Wang ◽  
Chi Ruan ◽  
Sheng Tao
Keyword(s):  
Optical Fiber ◽  
Fiber Optics ◽  
High Performance ◽  
Road Surface ◽  
Information Collection ◽  
Collection System ◽  
Road Vehicle ◽  
The Road ◽  
On The Road ◽  
Vehicle Information

A novel distributed fiber optics sensor used for road vehicle information collection system was proposed. Optical fiber was fixed on the road surface to be used as the sensing media. The vehicle information such as speed, vehicle type, vehicle weight and traffic flow can be obtained. To increase the sensitivity of such sensor, an optical Fabry-Perot (F-P) fiber interference was used. Sensing optical fiber was designed to be with a metal coating for fiber protection and high performance. Experiment results show that such distributed fiber optics sensor may be with a high performance in transportation area without digging when it is installed on the road surface.

Identification of the Structural Modes of High Performance Bicycles in the Perspective of Wobble Control

2011 ◽  
Author(s):  
Alberto Doria ◽  
Matteo Formentini
Keyword(s):  
Modal Analysis ◽  
Stiffness Matrix ◽  
High Speed ◽  
High Performance ◽  
Point Contact ◽  
Rigid Bodies ◽  
Bicycle Dynamics ◽  
The Road ◽  
On The Road ◽  
Analysis Of Stability

Most of researches in the field of bicycle dynamics deal with auto-stabilization and rider control by means of steer-torque and lean-torque. Bicycle models composed by rigid bodies with thin wheels making point contact with the road and rolling without any slip are suited for carrying out these studies. Numerical analysis of stability by means of these models leads to the capsize, castering and weave modes, which make it possible to understand many aspects of bicycle dynamics. However, some high performance bicycles at high speed show dangerous wobble oscillations. Cyclists’ experience and recent researches highlight that wobble phenomena are related both to tire properties and to fork and frame compliance. Since structural compliance in dynamic conditions generates vibrations, this paper focuses on the study of structural vibrations of high performance bicycles with the modal analysis approach. To isolate the effects of frame and fork compliance, four particular bicycles are considered, they are built assembling a pair of wheels, two forks (fork A and B) with the same shape but different structures and materials and two frames (frame A and B) with the same shape but different structures. Preliminary road tests showed that bicycles made with components A are more prone to wobble oscillations. In order to have a better comprehension of the different influence of fork and frame compliance, first the two forks (with the front wheel) are modally tested with the steer tube locked to a very stiff structure, then, the whole bicycles are tested. Modal analysis is carried out with the impulse method, for the analysis of each bicycle 60 FRFs are measured. The results of modal analysis are presented and the influence of identified modes on bicycle stability is discussed. An important issue of modal analysis of vehicles is the correlation between modal tests carried out in the laboratory and bicycle behavior on the road. When the vehicle is tested in the laboratory, additional constraints are added to guarantee equilibrium, but centrifugal forces are not present, because the vehicle is stationary. Since the analysis of the equations of linearized dynamics shows that the stiffness matrix includes a part due to centrifugal effects, the additional stiffness terms due to constraints in laboratory tests can be assumed to be equivalent to the centrifugal terms of the stiffness matrix at a certain speed. Details and limits of this equivalence are presented and discussed in the paper.

Study of Vehicle Vibration for High-Performance Land Mobile Satellite Tracking System for Telemedicine

2014 ◽  
Vol 5 (2) ◽  
pp. 27-48
Author(s):  
Toshihiko Kitano
Keyword(s):  
High Performance ◽  
Tracking System ◽  
Satellite Tracking ◽  
Data Communications ◽  
The Road ◽  
Vibration Data ◽  
Road Surfaces ◽  
Past Data ◽  
On The Road ◽  
Mobile Satellite

The land mobile satellite service (LMSS) is a key component of telemedicine and an important technology for grasping the status of a patient in an ambulance. However, rough road surfaces can destabilize satellite tracking and disturb data communications with the ambulance carrying the patient. Nevertheless, accurate estimates of the location of the vehicle at any given time and rapid reconfiguration of the tracking antenna based on past data can allow stable and effective data communications. This study examined positions characterized by large vibration amplitudes from past data on vehicle vibrations due to rough road surfaces as feature points to provide the vehicle system in advance with reference pitch angle vibration data. Drawing on reference vibration data for convolution and a cost function, The authors synchronized past data with real-time vibration data and accurately estimated the point at which the ambulance or other vehicle passes on the road. They also discuss limits on the range of vibrations that can be used for data synchronization. This study demonstrates that the present method enables high-precision estimates of vehicle location.

scholarly journals Polyfunctional Modifiers for Bitumen and Bituminous Materials with High Performance

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Alim Feizrakhmanovich Kemalov ◽  
Ruslan Alimovich Kemalov ◽  
Ilmira Maratovna Abdrafikova ◽  
Pavel Sagitovich Fakhretdinov ◽  
Dinar Zinnurovich Valiev
Keyword(s):  
Asphalt Concrete ◽  
High Performance ◽  
Concrete Pavements ◽  
Complex Action ◽  
The Road ◽  
Heavy Trucks ◽  
High Adhesion ◽  
On The Road ◽  
Road Paving

Over the last decade increase in capacity and the intensity of vehicular traffic has increased manifoldly, including heavy trucks, super singles, and higher tire pressures, resulting in significant increase of dynamic loads on the road surface which in turn lead to high quality requirements for bitumen in order to avoid premature wear and failure of asphalt concrete pavements. One of the possibilities to increase the quality of bitumen is to use special additives and modifiers that can provide a high adhesion to mineral filler and inhibit the aging and degradation processes in the asphalt coating. To achieve this, in the present study composite modifiers based on bisimidazolines derivatives were synthesized. The developed polyfunctional modifier (PFM) of complex action provides enhanced thermal stability, significantly improves the adhesion between bitumen binder and aggregates, and also improves the physical-mechanical properties of the asphalt concrete. Based on the test results it is recommended to use the synthesized samples of the PFM additive with complex action in asphalt mixtures for road paving.

scholarly journals Solid Waste Material Reuse Analysis: Filling the Road Subgrade with Riverway Silt and Sediment

2021 ◽  
Author(s):  
Qingzhou Wang ◽  
Liying Kong ◽  
Ming-Lang Tseng ◽  
Yang Song ◽  
Hongyu Wang
Keyword(s):  
Sensitivity Analysis ◽  
Solid Waste ◽  
Water Content ◽  
High Performance ◽  
High Water ◽  
Waste Material ◽  
Environmental Benefits ◽  
High Water Content ◽  
The Road ◽  
On The Road

Abstract This study proposes to explore solid waste material (SWM) reuse with the riverway silt and sediment, and examines the impacts of chemical composition on the road construction through sensitivity analysis. Considering the characteristics of silt mixture, it is necessary to investigate the modified materials to improve the mechanical feasibility for subgrade filling. In this study, modification schemes for construction waste and garbage slag presented well mechanical properties and environmental benefits in sensitivity analysis, especially for the high-water content silt modified by the garbage slag and lime mixture. The results indicate the lime-improved silt with medium water content is a cheap and high-performance material compared to the original silt. Moreover, modified silt demonstrated superior features in particle size, permeability and bearing capacity. Among six lime-improving schemes, the California bearer ratio (CBR2.5) increased from 7.1 to 19.6, while the minimum CBR2.5 was 2.45 times to the original silt. At last, this study proposes the engineering measures to improve the silt mixture subgrade to prevent heavy metals from polluting the water and soil environment. Further implications were also discussed.

TAntNet-4

2020 ◽  
pp. 874-905
Author(s):  
Ayman M. Ghazy ◽  
Hesham A. Hefny
Keyword(s):  
Road Network ◽  
High Performance ◽  
Routing Algorithm ◽  
Dynamic Routing ◽  
Transport Systems ◽  
Intelligent Transport Systems ◽  
Intelligent Transport ◽  
The Road ◽  
Traffic Routing ◽  
On The Road

Traffic Routing System (TRS) is one of the most important intelligent transport systems which is used to direct vehicles to good routes and reduce congestion on the road network. The performance of TRS mainly depends on a dynamic routing algorithm due to the dynamic nature of traffic on road network. AntNet algorithm is a routing algorithm inspired from the foraging behavior of ants. TAntNet is a family of dynamic routing algorithms that uses a threshold travel time to enhance the performance of AntNet algorithm when applied to traffic road networks. TAntNet-1 and TAntNet-2 adopt different techniques for path update to fast direct to the discovered good route and conserve on this good route. TAntNet-3 has been recently proposed by inspiring the scout behavior of bees to avoid the bad effect of forward ants that take bad routes. This chapter presents a new member in TAntNet family of algorithms called TAntNet-4 that uses two scouts instead of one compared with TAntNet-2. The new algorithm also saves the discovered route of each of the two scouts to use the best of them by the corresponding backward ant. The experimental results ensure the high performance of TAntNet-4 compared with AntNet, other members of TAntNet family.

An Investigation Into Fatigue Life Prediction of Engine Bearings

2005 ◽  
Author(s):  
Hao Xu
Keyword(s):  
Fatigue Life ◽  
High Performance ◽  
Test Procedure ◽  
Specific Load ◽  
Operational Conditions ◽  
The Road ◽  
Design Life ◽  
On The Road ◽  
Total Damage ◽  
Engine Bearing

In this study, work was carried out to investigate the fatigue life of engine bearings. A mathematical model was developed which utilises Miner’s rule to work out the total damage to an engine bearing when it is subject to all sorts of operational conditions. Given the fact that bearing fatigue rating has been traditionally tested against the specific load applied to bearings in test rigs, it was appropriate to develop a model using the specific load applied to a bearing, instead of the stress values in the bearing lining material. The model was then used to compare the life of con-rod bearings of a high performance diesel engine used on the road to that tested in the lab on test beds. The analysis showed the test procedure used in lab tests induced more severe damage than in the engine bearings in normal road use for design life.

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