Icing Problems on Road and Mitigation Methods in China

2006 ◽  
Author(s):  
W. B. Yu ◽  
M. Guo ◽  
Y. M. Lai ◽  
Z. Q. Liu ◽  
Q. H. Li
Keyword(s):  
Mitigation Methods

scholarly journals Categorizing Touch-Input Locations from Touchscreen Device Interfaces via On-Board Mechano-Acoustic Transducers

2021 ◽  
Vol 11 (11) ◽  
pp. 4834
Author(s):  
Kai Ren Teo ◽  
Balamurali B T ◽  
Jianying Zhou ◽  
Jer-Ming Chen
Keyword(s):  
User Interaction ◽  
Data Access ◽  
Machine Learning Techniques ◽  
Acoustic Features ◽  
Touch Input ◽  
Acoustic Transducers ◽  
Learning Techniques ◽  
Access Controls ◽  
Input Location ◽  
Mitigation Methods

Many mobile electronics devices, including smartphones and tablets, require the user to interact physically with the device via tapping the touchscreen. Conveniently, these compact devices are also equipped with high-precision transducers such as accelerometers and microphones, integrated mechanically and designed on-board to support a range of user functionalities. However, unintended access to these transducer signals (bypassing normal on-board data access controls) may allow sensitive user interaction information to be detected and thereby exploited. In this study, we show that acoustic features extracted from the on-board microphone signals, supported with accelerometer and gyroscope signals, may be used together with machine learning techniques to successfully determine the user’s touch input location on a touchscreen: our ensemble model, namely the random forest model, predicts touch input location with up to 86% accuracy in a realistic scenario. Accordingly, we present the approach and techniques used, the performance of the model developed, and also discuss limitations and possible mitigation methods to thwart possible exploitation of such unintended signal channels.

scholarly journals Effects of magnetic perturbations and radiation on the runaway avalanche

2021 ◽  
Vol 87 (2) ◽  
Author(s):  
P. Svensson ◽  
O. Embreus ◽  
S. L. Newton ◽  
K. Särkimäki ◽  
O. Vallhagen ◽  
...  
Keyword(s):  
Growth Rate ◽  
Runaway Electrons ◽  
Plasma Parameters ◽  
Perturbative Approach ◽  
Efficient Simulation ◽  
Strong Current ◽  
Magnetic Perturbations ◽  
Space Dynamics ◽  
Stochastic Magnetic Fields ◽  
Mitigation Methods

The electron runaway phenomenon in plasmas depends sensitively on the momentum- space dynamics. However, efficient simulation of the global evolution of systems involving runaway electrons typically requires a reduced fluid description. This is needed, for example, in the design of essential runaway mitigation methods for tokamaks. In this paper, we present a method to include the effect of momentum-dependent spatial transport in the runaway avalanche growth rate. We quantify the reduction of the growth rate in the presence of electron diffusion in stochastic magnetic fields and show that the spatial transport can raise the effective critical electric field. Using a perturbative approach, we derive a set of equations that allows treatment of the effect of spatial transport on runaway dynamics in the presence of radial variation in plasma parameters. This is then used to demonstrate the effect of spatial transport in current quench simulations for ITER-like plasmas with massive material injection. We find that in scenarios with sufficiently slow current quench, owing to moderate impurity and deuterium injection, the presence of magnetic perturbations reduces the final runaway current considerably. Perturbations localised at the edge are not effective in suppressing the runaways, unless the runaway generation is off-axis, in which case they may lead to formation of strong current sheets at the interface of the confined and perturbed regions.

scholarly journals Perceptions and realities of elephant crop raiding and mitigation methods

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Christian Kiffner ◽  
Isabel Schaal ◽  
Leah Cass ◽  
Kiri Peirce ◽  
Olivia Sussman ◽  
...  
Keyword(s):  
Crop Raiding ◽  
Mitigation Methods

Determining and evaluating the level of socio-economic risks for Russia to respond to ‘Grand Challenges’

2021 ◽  
Vol 17 (3) ◽  
pp. 443-469
Author(s):  
Nataliya V. KUZNETSOVA ◽  
Ekaterina V. KOCHEVA ◽  
Nikolai A. MATEV
Keyword(s):  
Economic Development ◽  
Risk Mitigation ◽  
Market Potential ◽  
Russian Regions ◽  
Economic Agents ◽  
Grand Challenges ◽  
Technological Gap ◽  
Socio Economic Development ◽  
Mitigation Methods ◽  
Economic Risks

Subject. The modern economic development strongly depend on a powerful regulator, such as grand challenges, which have become a critical barrier, requirement, level that should be attained. Considering the grand challenges, the country set up goals and tasks for the coming period and adjusts operations of economic agents. Therefore, it is necessary to assess the gap between the absolute and current market potential with reference to qualitative and quantitative indicators. The study is called to assess whether Russia is prepared for the existing and arising grand challenges. We also determine risk mitigation methods and the probability of negative scenarios. Objectives. We determine and evaluate the level of socio-economic risks for Russia to respond to the grand challenges. We also pinpoint key directions for the Russian regions to continue their socio-economic development in order to promote their further economic growth. Methods. The study presents the economic-mathematical modeling of the nexus among factors that determine socio-economic risks of the GRP dynamics to find their mitigation methods. In the study, the logit-model with dummy variables that attribute the regions to certain clusters. Results. We analyzed and classified risks of the Russian regions by 10 integral indicators. The article shows homogeneous regional zones exposed to similar socio-economic development risks. We also carry out the multivariate classification of the Russian regions by the risks assessed. As the findings show, the Russian regions strongly differ by socio-economic risks. The article spotlights priorities of the socio-economic development of the constituent entities of the Russian Federation. Conclusions and Relevance. As their key development vector, the Russian regions need to overcome the technological gap, mitigate the S&T potential risk and a drop in the innovative activity of the economy.

Routing Attacks and Mitigation Methods for RPL-Based Internet of Things

2019 ◽  
Vol 21 (2) ◽  
pp. 1582-1606 ◽  
Author(s):  
Ahmed Raoof ◽  
Ashraf Matrawy ◽  
Chung-Horng Lung
Keyword(s):  
Internet Of Things ◽  
Routing Attacks ◽  
Mitigation Methods

scholarly journals Life Cycle Assessment of Railway Ground-Borne Noise and Vibration Mitigation Methods Using Geosynthetics, Metamaterials and Ground Improvement

2018 ◽  
Vol 10 (10) ◽  
pp. 3753 ◽  
Author(s):  
Sakdirat Kaewunruen ◽  
Victor Martin
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Ground Improvement ◽  
Cycle Performance ◽  
Vibration Mitigation ◽  
Noise And Vibration ◽  
Climate Conditions ◽  
Extreme Climate ◽  
Mitigation Methods ◽  
The Impact

Significant increase in the demand for freight and passenger transports by trains pushes the railway authorities and train companies to increase the speed, the axle load and the number of train carriages/wagons. All of these actions increase ground-borne noise and vibrations that negatively affect people who work, stay, or reside nearby the railway lines. In order to mitigate these phenomena, many techniques have been developed and studied but there is a serious lack of life-cycle information regarding such the methods in order to make a well-informed and sustainable decision. The aim of this study is to evaluate the life-cycle performance of mitigation methods that can enhance sustainability and efficacy in the railway industry. The emphasis of this study is placed on new methods for ground-borne noise and vibration mitigation including metamaterials, geosynthetics, and ground improvement. To benchmark all of these methods, identical baseline assumptions and the life-cycle analysis over 50 years have been adopted where relevant. This study also evaluates and highlights the impact of extreme climate conditions on the life-cycle cost of each method. It is found that the anti-resonator method is the most expensive methods compared with the others whilst the use of geogrids (for subgrade stiffening) is relatively reliable when used in combination with ground improvements. The adverse climate has also played a significant role in all of the methods. However, it was found that sustainable methods, which are less sensitive to extreme climate, are associated with the applications of geosynthetic materials such as geogrids, composites, etc.

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