scholarly journals Evaluation of Ride Comfort and Driving Safety for Moving Vehicles on Slender Coastal Bridges

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
J. Zhu ◽  
W. Zhang ◽  
M. X. Wu
Keyword(s):  
Ride Comfort ◽  
Comprehensive Evaluation ◽  
Evaluation Criteria ◽  
Weather Conditions ◽  
Dynamic Responses ◽  
Evaluation Methodology ◽  
Driving Safety ◽  
Wave Loads ◽  
Coastal Bridges ◽  
Moving Vehicles

Evaluating driving safety of moving vehicles on slender coastal bridges as well as bridge safety is important to provide supporting data to make decisions on continuing or closing the operations of bridges under extreme weather conditions. However, such evaluations could be complicated due to the complex dynamic interactions of vehicle-bridge-wind-wave (VBWW) system. The present study proposes a comprehensive evaluation methodology on vehicle ride comfort and driving safety on the slender coastal bridges subject to vehicle, wind, and wave loads. After a brief introduction of the VBWW coupling dynamic system and obtaining the dynamic responses of the vehicles, the vehicle ride comfort is evaluated using the advanced procedures as recommended in the ISO 2631-1 standard based on the overall vibration total value (OVTV). The vehicle driving safety is analyzed based on two evaluation criteria, i.e., the roll safety criteria (RSC) and the sideslip safety criteria (SSC), through the vehicle contact force responses at the wheels. Finally, the proposed methodology is applied to a long-span cable-stayed bridge for the vehicle ride comfort and driving safety evaluation.

scholarly journals A Methodology to Evaluate Standards and Platforms within Cyber Threat Intelligence

2020 ◽  
Vol 12 (6) ◽  
pp. 108
Author(s):  
Alessandra de Melo e Silva ◽  
João José Costa Gondim ◽  
Robson de Oliveira Albuquerque ◽  
Luis Javier García Villalba
Keyword(s):  
Cyber Security ◽  
Comprehensive Evaluation ◽  
Evaluation Criteria ◽  
Evaluation Methodology ◽  
Proactive Approach ◽  
The Past ◽  
Threat Intelligence ◽  
Cyber Threat ◽  
Cyber Threat Intelligence ◽  
Selection Of

The cyber security landscape is fundamentally changing over the past years. While technology is evolving and new sophisticated applications are being developed, a new threat scenario is emerging in alarming proportions. Sophisticated threats with multi-vectored, multi-staged and polymorphic characteristics are performing complex attacks, making the processes of detection and mitigation far more complicated. Thus, organizations were encouraged to change their traditional defense models and to use and to develop new systems with a proactive approach. Such changes are necessary because the old approaches are not effective anymore to detect advanced attacks. Also, the organizations are encouraged to develop the ability to respond to incidents in real-time using complex threat intelligence platforms. However, since the field is growing rapidly, today Cyber Threat Intelligence concept lacks a consistent definition and a heterogeneous market has emerged, including diverse systems and tools, with different capabilities and goals. This work aims to provide a comprehensive evaluation methodology of threat intelligence standards and cyber threat intelligence platforms. The proposed methodology is based on the selection of the most relevant candidates to establish the evaluation criteria. In addition, this work studies the Cyber Threat Intelligence ecosystem and Threat Intelligence standards and platforms existing in state-of-the-art.

scholarly journals An Optimal Longitudinal Control Strategy of Platoons Using Improved Particle Swarm Optimization

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Zhizhou Wu ◽  
Zhibo Gao ◽  
Wei Hao ◽  
Jiaqi Ma
Keyword(s):  
Particle Swarm Optimization ◽  
Control Strategy ◽  
Ride Comfort ◽  
Particle Swarm ◽  
Experimental Simulation ◽  
Driving Safety ◽  
Relative Speed ◽  
Longitudinal Control ◽  
Swarm Optimization ◽  
Improved Particle Swarm Optimization

Most existing longitudinal control strategies for connected and automated vehicles (CAVs) have unclear adaptability without scientific analysis regarding the key parameters of the control algorithm. This paper presents an optimal longitudinal control strategy for a homogeneous CAV platoon. First of all, the CAV platoon models with constant time-headway gap strategy and constant spacing gap strategy were, respectively, established based on the third-order linear vehicle dynamics model. Then, a linear-quadratic optimal controller was designed considering the perspectives of driving safety, efficiency, and ride comfort with three performance indicators including vehicle gap error, relative speed, and desired acceleration. An improved particle swarm optimization algorithm was used to optimize the weighting coefficients for the controller state and control variables. Based on the Matlab/Simulink experimental simulation, the analysis results show that the proposed strategy can significantly reduce the gap error and relative speed and improve the flexibility and initiative of the platoon control strategy compared with the unoptimized strategies. Sensitivity analysis was provided for communication lag and actuator lag in order to prove the applicability and effectiveness of this proposed strategy, which will achieve better distribution of system performance.

Estimation of bridge static response and vehicle weights by frequency response analysis

1998 ◽  
Vol 25 (4) ◽  
pp. 631-639 ◽  
Author(s):  
G Thater ◽  
P Chang ◽  
D R Schelling ◽  
C C Fu
Keyword(s):  
Dynamic Effect ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Static Response ◽  
Actual Weight ◽  
Service Testing ◽  
Weigh In Motion ◽  
Moving Vehicles ◽  
Bridge Structures ◽  
Truck Weight

A methodology is developed to more accurately estimate the static response of bridges due to moving vehicles. The method can also be used to predict dynamic responses induced by moving vehicles using weigh-in-motion (WIM) techniques. Historically, WIM is a well-developed technology used in highway research, since it has the advantage of allowing for the stealthy automatic collection of weight data for heavy trucks. However, the lack of accuracy in determining the dynamic effect in bridges has limited the potential for its use in estimating the fatigue life of bridge structures and their components. The method developed herein amends the current WIM procedures by filtering the dynamic responses accurately using the Fast Fourier Transform (FFT). Example applications of the proposed method are shown by using computer-generated data. The method is fast and improves the predicted truck weight up to 5% of the actual weight, as compared to errors up to 10% using the current WIM methods.Key words: weigh-in-motion, digital filters, FFT, bridge dynamics, in-service testing.

Analysis of the energy harvesting potential–based suspension for truck semi-trailer

2018 ◽  
Vol 233 (11) ◽  
pp. 2955-2969 ◽  
Author(s):  
Mohamed AA Abdelkareem ◽  
Mina MS Kaldas ◽  
Mohamed Kamal Ahmed Ali ◽  
Lin Xu
Keyword(s):  
Ride Comfort ◽  
Simulation Analysis ◽  
Conflict Analysis ◽  
Driving Safety ◽  
Dissipated Energy ◽  
Ride Quality ◽  
Surface Model ◽  
Long Distance ◽  
Class C ◽  
The Right

As the articulated trucks are mainly used for long distance transportations, the design of the suspension system became a major concern and a research hotspot not only for ride comfort and driving safety but also for energy consumption. Therefore, the objective of this study is to conduct a comprehensive parametrical–based conflict analysis between the ride comfort and road holding together with the potential power of the shock absorbers. The simulation analysis is performed using a 23 degree-of-freedom full truck semi-trailer mathematical model with random road surface model. The bounce and combined excitation modes for the truck model are applied to present the pro and contra of the simplified and realistic analysis. The bounce mode is applied for a road Class C and truck driving speed of 20 m/s, while the combined mode is performed with the same truck-speed but considering a Class C road for the left track and Class D road for the right track considering the time delay between the truck axles. The truck dynamics including the mean potential power, average dynamic tire load and bounce, and pitch and roll accelerations is comprehensively combined in the conflict analysis–based suspension and driving parameters. The obtained simulation results showed that the articulated truck suspension should be designed considering a realistic excitation condition. In contrast to the bounce mode, under the combined road input, the tractor ride quality and road handling performances are improved when a heavily damped suspension is considered. Furthermore, the otherwise dissipated energy through the damping events can reach an overall value between 2 and 4 kW.

scholarly journals EVALUASI PELAKSANAAN HOME VISIT DI SMP

2019 ◽  
Vol 1 (2) ◽  
pp. 111-120
Author(s):  
Bernardinus Agus Arswimba
Keyword(s):  
South Carolina ◽  
Model Evaluation ◽  
Home Visit ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Criteria ◽  
Performance Standards ◽  
Professional Counselor ◽  
The Difference

ABSTRACT Home visit is a responsive service that is urgent, so it needs to be implemented immediately to help students solve problems faced. If home visit is not done well, the problem will have a more complex impact on students. The purpose of the study was to determine the performance of counselors according to or not with the standards and professional counselor evaluation criteria for Comprehensive (Evaluation Model South Carolina) counseling guidance to make decisions or follow-up the programs that have been implemented. The research method used is descriptive evaluation using the Model Evaluation Discrepancy. This model measures the difference between performance standards and real conditions that have been implemented. The instrument of this research is using questionnaires and interviews. The results showed that home visits conducted by counselors at Santa Maria Malang Middle School in the category "close from standard". Keywords: home visit, model evaluation discrepancy

scholarly journals The role of organic farming in the formation of the harvest and the nutrition value of potatoes on unused arable lands and fallow lands of Altay Region (Western Siberia)

2017 ◽  
Vol 7 (4) ◽  
pp. 388-392
Author(s):  
D. A. Durnikin ◽  
O. Y. Voronkova ◽  
V. A. Kundius ◽  
L. I. Petrova
Keyword(s):  
Organic Farming ◽  
Western Siberia ◽  
Comprehensive Evaluation ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Mineral Fertilizers ◽  
Pests And Diseases ◽  
Altai Region ◽  
Fallow Lands

<p>In the article, a comprehensive evaluation of the role of organic farming in the formation of the crop and the nutritional value of perspective varieties cultivated within the climatic zone of Western Siberia is considered. The most favorable conditions for growing potatoes in the Altai Region of the Western Siberia are compared with other regions of Russia and those of foreign countries.<br />In the southern and southeastern regions of the Altai region, where the formation of tubers coincides with the hot period of the first half of summer, the high soil temperature negatively affects the eyes of the tubers. Therefore, the seed material here rapidly degenerates. To avoid this, summer potatoes are planted. Irrigation ensures high and stable potato yields irrespective of weather conditions. Moisture content of soil during the period from planting potatoes to shoots should be maintained at the level of 65-70 per cent, in the budding and flowering phases - of 75-85 per cent and during the period from the beginning of wilting of potato tops – of 60-65 per cent. The number of irrigations, their terms and standards, are determined by taking into account soil-climatic conditions, the phase of plant development and the application area of a crop.<br />The most effective irrigation method is sprinkling. The irrigation norm ranges from 500 to 800 m3 per hectare. On irrigated lands, plowing of potato fields is carried out necessarily with a soil cultivator, preventing the formation of a plow pan. Rows are located across the slope, or angle-wise. After watering space between rows are loosened (on heavy soils also before watering). During irrigation process it is necessary to apply higher quantities of organic and mineral fertilizers and to carry out a set of measures to control weeds, pests and diseases of potatoes.<br /><br /></p>

scholarly journals A Comprehensive Evaluation Rubric for Assessing Instructional Apps

10.28945/2097 ◽  
2015 ◽  
Vol 14 ◽  
pp. 021-053 ◽  
Author(s):  
Cheng-Yuan Lee ◽  
Todd Sloan Chener
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Criteria ◽  
Internet Search ◽  
Precise Analysis ◽  
Educational Computer ◽  
Computer Based ◽  
Educational Potential ◽  
Instructional Apps

There is a pressing need for an evaluation rubric that examines all aspects of educational apps designed for instructional purposes. In past decades, many rubrics have been developed for evaluating educational computer-based programs; however, rubrics designed for evaluating the instructional implications of educational apps are scarce. When an Internet search for existing rubrics was conducted, only two such rubrics were found, and the evaluation criteria used in those rubrics was not clearly linked to previously conducted research nor were their evaluative dimensions clearly defined. These shortcomings result in reviewers being unable to use those rubrics to provide teachers with a precise analysis of an educational app’s instructional potential. In response, this paper presents a comprehensive rubric with 24-evaluative dimensions tailored specifically to analyze the educational potential of instructional apps.

Evaluation of the Development Level of China' s Precise Finishing Industry

2006 ◽  
Vol 315-316 ◽  
pp. 864-867
Author(s):  
Shi An ◽  
J. Wang ◽  
J.P. Qian
Keyword(s):  
Analytical Hierarchy Process ◽  
Evaluation Method ◽  
Expert Knowledge ◽  
Comprehensive Evaluation ◽  
Evaluation Criteria ◽  
Development Planning ◽  
Fuzzy Evaluation ◽  
Fuzzy Analytical Hierarchy Process ◽  
Development Level ◽  
Hierarchy Process

Recognizing and evaluating the development level of a country’s precise finishing industry, is the prerequisite to the country’s decision-making on the development planning and guiding policies in this industry. This paper presents a Fuzzy Analytical Hierarchy Process (FAHP) Model on the base of “Expert Knowledge”. This model combines the advantages of Fuzzy Evaluation Method and Analytical Hierarchy Process (AHP), and can give relatively reliable evaluation results with incomplete information of the evaluation criteria. The application of the FAHP Model provide reliable comprehensive evaluation data.

A novel tri-semicircle shaped submerged breakwater for mitigating wave loads on coastal bridges part I: Efficacy

2022 ◽  
Vol 245 ◽  
pp. 110462
Author(s):  
Shihao Xue ◽  
Yong Xu ◽  
Guoji Xu ◽  
Jinsheng Wang ◽  
Qin Chen
Keyword(s):  
Wave Loads ◽  
Submerged Breakwater ◽  
Coastal Bridges

Evaluating the Impact and ROI of Medical Education Programs

2020 ◽  
pp. 261-293
Author(s):  
Timothy R. Brock
Keyword(s):  
Medical Education ◽  
Evaluation System ◽  
Process Model ◽  
Comprehensive Evaluation ◽  
Evaluation Framework ◽  
Evaluation Methodology ◽  
Education Programs ◽  
Organizational Excellence ◽  
Medical Education Program ◽  
Measurement And Evaluation

Medical education programs must deliver valued results that stakeholders expect in return for their funding investments. In the past, healthcare organizations accepted reports about test results and participant perceptions of the program as adequate evidence of course outcomes. Today, program funders expect evaluations that provide evidence that medical education programs improve organizational excellence measures to justify ongoing funding. This chapter will explain four of the five elements required of a proven, comprehensive evaluation system. This five-element system is necessary to provide the desired organizational excellence evidence that medical educators can adopt to address the needs of stakeholders at different levels of an organization. Specifically, this chapter will overview an evaluation framework, a process model, and guiding principles that are crucial elements of this methodology. The chapter ends with a case study that shows how a medical education team used this measurement and evaluation methodology to plan how they would design and evaluate a medical education program requested by executives to solve an ICU central line infection problem.

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