Study on Road Network Reserved Capacity on Different Levels of Service and Stochastic Conditions

ICCTP 2009 ◽  
2009 ◽  
Author(s):  
Zhengwei Liu ◽  
Lin Cheng
Keyword(s):  
Road Network ◽  
Stochastic Conditions ◽  
Levels Of Service ◽  
Different Levels

Increasing Community College Graduation Rates: A Synthesis of Findings on the ASAP Model From Six Colleges Across Two States

2021 ◽  
pp. 016237372110367
Author(s):  
Cynthia Miller ◽  
Michael J. Weiss
Keyword(s):  
New York ◽  
Controlled Trial ◽  
College Graduation ◽  
Randomized Controlled ◽  
College Graduation Rates ◽  
Associate's Degree ◽  
Levels Of Service ◽  
The City ◽  
Permanent Increase ◽  
Different Levels

This paper presents new estimates of the effects of the City University of New York’s ( CUNY’s) Accelerated Study in Associate Programs ( ASAP) model, evaluated using a randomized controlled trial first in New York and later through a replication in Ohio. It presents longer-term effects of CUNY ASAP in New York, showing that the program’s effect on associate’s degree receipt persisted through 8 years and likely represents a permanent increase in degree receipt. It also presents an analysis from the pooled study samples in New York and Ohio. The findings indicate that the program had consistent effects on degree receipt across the two states but also for somewhat different levels of service contrast, such as the number of additional advising visits.

Forecasting Demand for Paratransit Required by the Americans with Disabilities Act

1997 ◽  
Vol 1571 (1) ◽  
pp. 67-74 ◽  
Author(s):  
David Koffman ◽  
David Lewis
Keyword(s):  
New York ◽  
Americans With Disabilities Act ◽  
Econometric Models ◽  
Econometric Analysis ◽  
Service Availability ◽  
Cross Sectional ◽  
Advantages And Disadvantages ◽  
Denial Rates ◽  
Levels Of Service ◽  
Different Levels

Four techniques are described for forecasting the demand for paratransit required by the Americans with Disabilities Act (ADA): surveys, intuitive comparison with other systems, cross-sectional econometric analysis, and time-series econometric analysis. The application of these methods in Seattle and New York is described, illustrating the advantages and disadvantages of each method. The ADA leaves considerable room for localities to determine the level of trip denials that can be tolerated. The econometric models provide a quantitative forecast of the effects of different levels of service availability as measured by trip denial rates. It demonstrates that the importance of service availability varies among communities.

scholarly journals Efficient Hierarchical Authentication Protocol for Multiserver Architecture

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Jiangheng Kou ◽  
Mingxing He ◽  
Ling Xiong ◽  
Zeqiong Lv
Keyword(s):  
Service Providers ◽  
Security Analysis ◽  
Authentication Protocol ◽  
Security Requirements ◽  
Secure Communications ◽  
Security Model ◽  
Practical Applications ◽  
Levels Of Service ◽  
Different Levels ◽  
Provably Secure

The multiserver architecture authentication (MSAA) protocol plays a significant role in achieving secure communications between devices. In recent years, researchers proposed many new MSAA protocols to gain more functionality and security. However, in the existing studies, registered users can access to all registered service providers in the system without any limitation. To ensure that the system can restrict users that are at different levels and can access to different levels of service providers, we propose a new lightweight hierarchical authentication protocol for multiserver architecture using a Merkle tree to verify user’s authentication right. The proposed protocol has hierarchical authentication functionality, high security, and reasonable computation and communication costs. Moreover, the security analysis demonstrates that the proposed protocol satisfies the security requirements in practical applications, and the proposed protocol is provably secure in the general security model.

Multi-Resolution Modeling of High Speed Railway Infrastructure for Train Operation Simulation

2011 ◽  
Vol 97-98 ◽  
pp. 560-565 ◽  
Author(s):  
Xi Jiang ◽  
Xue Sheng Ji ◽  
Jun Liu
Keyword(s):  
Simulation Model ◽  
High Speed ◽  
Road Network ◽  
Information Needs ◽  
Logic Function ◽  
Railway Infrastructure ◽  
Railway Signal ◽  
Train Operation ◽  
Multi Level ◽  
Different Levels

This paper analyzes the railway infrastructure simulation demands in train operation and organization at different levels. It takes the rail road network topology model and the railway signal system model as the core to build a multi-resolution-based simulation model architecture of the railway infrastructure. According to different information needs of railway infrastructure simulation model, it proposes a Hierarchical model achieving logic function of signaling system, and studies the signal system’s multi-resolution simulation methods through multi-level logic block configuration. According to the space information requirement of different simulation levels, the paper builds a multi-resolution rail road network mode.

Traffic Volume Detection Using Infrastructure-Based LiDAR under Different Levels of Service Conditions

2021 ◽  
Vol 147 (11) ◽  
pp. 04021080
Author(s):  
Junxuan Zhao ◽  
Hao Xu ◽  
Yibin Zhang ◽  
Yuan Tian ◽  
Hongchao Liu
Keyword(s):  
Traffic Volume ◽  
Service Conditions ◽  
Levels Of Service ◽  
Different Levels

A Method to Optimize the On-Time Performance of Containerships

1994 ◽  
Vol 31 (01) ◽  
pp. 52-65
Author(s):  
Reynaldo B. Vea
Keyword(s):  
Nonlinear Programming ◽  
Solution Method ◽  
Fuel Oil ◽  
Scheduling Problem ◽  
Discrete Simulation ◽  
Optimization Criteria ◽  
Time Performance ◽  
Ship Scheduling ◽  
Levels Of Service ◽  
Different Levels

A method to optimize the on-time performance of containerships is proposed. Two optimization criteria are considered: the maximization of the percentage of on-time arrivals and the minimization of the magnitude of arrival delays. In both cases, the problem is posed as a ship scheduling problem in which the randomness of cargo volumes, port productivity, and sea conditions is considered. Fuel oil costs corresponding to different levels of service are investigated. A solution method involving discrete simulation and nonlinear programming is developed. A numerical example is presented to illustrate the method.

Reducing Information Asymmetry in Cloud Marketplaces

2012 ◽  
Vol 3 (4) ◽  
pp. 1-10 ◽  
Author(s):  
Vladimir Stantchev ◽  
Gerrit Tamm
Keyword(s):  
Cloud Computing ◽  
Information Asymmetry ◽  
Information Economics ◽  
It Governance ◽  
Software As A Service ◽  
Supply Side ◽  
Pricing Models ◽  
The Right ◽  
Levels Of Service ◽  
Different Levels

Cloud Computing is emerging as a predominant paradigm for obtaining and providing computing functionality in the enterprise. Organizations that are planning to use cloud computing offerings struggle with the question “How do I choose the right offering?” Cloud offerings exhibit a variety of pricing models and different levels of service and functionality. In this article the authors define first Cloud Computing in the context of IT Governance. Then they set criteria to compare different offerings at the level of Software-as-a-Service (SaaS). This is an important precondition for the reduction of the verifiable information asymmetry and uncertainty in the cloud market. Besides deficiencies on the supply side, regarding configuration, display and communication of service bundles, the limited knowledge of potential buyers is main reason for the modest adoption. The authors apply strategies derived from information economics to reduce this asymmetry by integrating information substitutes in the service marketplace description, thereby transforming experience and credence qualities into search qualities.

Mobility-as-a-Service and Demand-Responsive Transport: Practical Implementation in Traditional Forecasting Models

2020 ◽  
pp. 036119812096936
Author(s):  
Pedro Camargo ◽  
Erin Pammenter ◽  
Aliasgar Inayathusein
Keyword(s):  
Autonomous Vehicles ◽  
The United States ◽  
Metropolitan Region ◽  
Practical Implementation ◽  
Forecasting Models ◽  
Computational Performance ◽  
The Cost ◽  
Levels Of Service ◽  
Us Cities ◽  
Different Levels

The increasing effect of Transport Network Companies (TNCs) in major US cities, allied to the expectation that connected and autonomous vehicles (CAVs) will become the prevailing type of automobile on the streets in the coming decades, requires such a trend to be reflected in our forecasting models. Yet, most of the efforts undertaken in the United States and elsewhere are largely focused on understanding the demand for such types of transportation and have left aside the analysis of crucial differences in envisaged systems, such as pooled versus single-occupancy vehicles, use of CAVs as access modes to mass transit, and the cost corresponding to different levels of service in citywide systems. In this paper we introduce a new algorithm for modeling pooled CAVs and a framework for integrating this into traditional forecasting models. We also present the preliminary results of an application of the proposed methodology to the metropolitan region of Vancouver, British Columbia. The results are promising, although a few implementation choices made for this study have resulted in poor computational performance.

Research on Queue Scheduling Algorithm Modeling and Analysis

2012 ◽  
Vol 542-543 ◽  
pp. 1390-1393
Author(s):  
Heng Hua Shi ◽  
Xin Xu ◽  
Yu Jie Wang ◽  
Yuan Yue Yang
Keyword(s):  
Scheduling Algorithm ◽  
Scheduling Algorithms ◽  
Network Resource ◽  
Modeling And Analysis ◽  
Core Technology ◽  
Queue Scheduling ◽  
Bottleneck Link ◽  
Use Of The Internet ◽  
Levels Of Service ◽  
Different Levels

With the development of network technology and the wide use of the Internet, QoS has attracted wide attention. Queue scheduling algorithm of Router is an important core technology of the network resource management for QoS. Through controlling usage of the link bandwidth of the different type groups, the different traffics have the different levels of service. Based on the analysis and modeling of FIFO, PQ, and WFQ scheduling algorithms, the simulation experiment simulate three different priority video conferencing traffic, and apply FIFO, PQ, and WFQ scheduling algorithms on the bottleneck link. The simulation results compare network delay of FIFO, PQ, and WFQ scheduling algorithms, and describe the various queue scheduling algorithm characteristics.

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