scholarly journals Analysis and Scientific Methodological Recommendations for Reducing the Delay on Railway Crossings

2021 ◽  
pp. 77-79
Author(s):  
Ezozbek Turalievich Tokhirov
Keyword(s):  
Travel Time ◽  
Waiting Time ◽  
Research Interest ◽  
Motor Vehicles ◽  
Research Focus ◽  
Level Crossing ◽  
Current Research Interest ◽  
Effective Result

In this research focus on reduces waiting time and safe travel time at a level crossing. Current research interest is the application to improve implementation, reducing the waiting time for motor vehicles at a railroad crossing. At last, got at the level crossing 5% effective result for one improving period.

scholarly journals EXPERIMENTS SIMULATION AND DESIGN TO SET TRAFFIC LIGHTS’ OPERATION RULES

2016 ◽  
Author(s):  
JOSÉ ALFREDO JIMÉNEZ GARCÍA
Keyword(s):  
Travel Time ◽  
Fuel Consumption ◽  
Motor Vehicles ◽  
Speed Limit ◽  
Vehicle Traffic ◽  
Cycle Times ◽  
Traffic Lights ◽  
Traffic System ◽  
Operation Rules ◽  
Greenhouse Effect Gas

In this paper it is used the experimental design to minimize the travel time of motor vehicles, in one of the most important avenues of Celaya City in Guanajuato, Mexico, by means of optimal synchronization of existing traffic lights. In the optimization process three factors are considered: the traffic lights’ cycle times, the synchrony defined as stepped, parallel and actual, and speed limit, each one with 3 evaluation levels. The response variables to consider are: motor vehicles’ travel time, fuel consumption and greenhouse effect gas (CO2) emissions. The different experiments are performed using the simulation model developed in the PTV-VISSIM software, which represents the vehicle traffic system. The obtained results for the different proposed scenarios allow to find proper levels at which the vehicle traffic system must be operated in order to improve mobility, to reduce contamination rates and decrease the fuel consumption for the different motor vehicles that use the avenue.DOI: http://dx.doi.org/10.4995/CIT2016.2016.4093

scholarly journals Service quality of transit and demand-supply forecasting for ride-hailing in the Jakarta Greater Area, Indonesia

2021 ◽  
Author(s):  
Gito Sugiyanto ◽  
◽  
Yanto Yanto ◽  
Aris Wibowo ◽  
Teguh Wiji Astoto ◽  
...  
Keyword(s):  
Service Quality ◽  
Travel Time ◽  
Waiting Time ◽  
Time Travel ◽  
Transportation Services ◽  
Travel Costs ◽  
Research Findings ◽  
Supply Model ◽  
Better Than

The extensive use of smartphones by individuals has led innovators to develop application-based transportation services. Ride-hailing systems have been extensively operated in more than 600 cities worldwide. With the competition between taxis and ride-hailing, the number of fleets must be regulated. Identifying factors that influence the demand of taxi and ride-hailing and how the quality transit service is very important. The aims of this research are to identify the factors that influence demand for taxis and ride-hailing and the service quality of taxis and ride-hailing service. The study identified socio-demographic and trip characteristics from 949 respondents in the Jakarta Greater area, Indonesia. Respondents interviewed about the waiting time, travel time and travel costs for the origin-destination of trips that are most often done using taxi, ride-hailing, and bus. The service quality of ride-hailing and taxi was analyzed based on the respondent’s preferences from an important-performance analysis survey. The forecasting demand of taxi and ride-hailing in the Jakarta Greater area using demand-supply model is 71,660 vehicles. The research findings are that service quality of ride-hailing is better than conventional taxis based on waiting time, travel time and travel cost variable.

Na7(IO3)(SO4)3: the first noncentrosymmetric alkaline-metal iodate-sulfate with isolated [IO3] and [SO4] units

2021 ◽  
Vol 57 (75) ◽  
pp. 9598-9601
Author(s):  
Mengmeng Ding ◽  
Hongwei Yu ◽  
Zhanggui Hu ◽  
Jiyang Wang ◽  
Yicheng Wu
Keyword(s):  
Potential Application ◽  
Nonlinear Optical ◽  
Research Interest ◽  
Alkaline Metal ◽  
Nonlinear Optical Crystals ◽  
Optical Crystals ◽  
Current Research Interest

Metal iodates are of current research interest because of their potential application as nonlinear optical crystals.

scholarly journals Unravelling the Photoprotective Mechanisms of Nature-Inspired Ultraviolet Filters Using Ultrafast Spectroscopy

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 3945
Author(s):  
Temitope T. Abiola ◽  
Abigail L. Whittock ◽  
Vasilios G. Stavros
Keyword(s):  
Uv Radiation ◽  
Computational Methods ◽  
Ultrafast Spectroscopy ◽  
Relaxation Mechanism ◽  
Research Interest ◽  
Uv Filters ◽  
Future Design ◽  
The Future ◽  
Current Research Interest ◽  
A Current

There are several drawbacks with the current commercially available ultraviolet (UV) filters used in sunscreen formulations, namely deleterious human and ecotoxic effects. As a result of the drawbacks, a current research interest is in identifying and designing new UV filters. One approach that has been explored in recent years is to use nature as inspiration, which is the focus of this review. Both plants and microorganisms have adapted to synthesize their own photoprotective molecules to guard their DNA from potentially harmful UV radiation. The relaxation mechanism of a molecule after it has been photoexcited can be unravelled by several techniques, the ones of most interest for this review being ultrafast spectroscopy and computational methods. Within the literature, both techniques have been implemented on plant-, and microbial-inspired UV filters to better understand their photoprotective roles in nature. This review aims to explore these findings for both families of nature-inspired UV filters in the hope of guiding the future design of sunscreens.

Toxicology Elsewhere

1994 ◽  
Vol 13 (11) ◽  
pp. 781-784
Keyword(s):  
Professional Practice ◽  
Research Interest ◽  
Experimental Toxicology ◽  
New Material ◽  
Current Research Interest ◽  
Expert Commentary

The purpose of this section in Human and Experimental Toxicology is to draw attention to papers that are of significance to toxicologists but may be missed because, in the main, they have not been published in mainstream toxicology journals. In addition the papers selected attempt to reflect topics of the liveliest current research interest as well as those which impinge upon the professional practice of toxicology. In order to assist the assimilation of such new material an expert commentary is provided and because these aim to focus succinctly on the advance made they should also serve as mini-reviews to keep us all abreast of our rapidly developing, multi-disciplinary, subject.

scholarly journals Rail Transport Infrastructure on the Example of Level Crossing System

2018 ◽  
Vol 7 (4.3) ◽  
pp. 228 ◽  
Author(s):  
Perzyński Tomasz ◽  
Wojciechowski Jerzy ◽  
Łukasik Zbigniew
Keyword(s):  
Markov Processes ◽  
Statistical Data ◽  
Rail Transport ◽  
Transport Infrastructure ◽  
Motor Vehicles ◽  
Level Crossing ◽  
Automation Systems ◽  
Automatic Level

The paper presents an analysis of the system of automatic level crossing. The proposed system belongs to a group of linear devices that ensure safe movement of motor vehicles at intersections of railway and car roads. In the paper, the computational tasks were carried out. On the basis of statistical data, the THR rate, which is characteristic for rail transport, was estimated. An example of modeling railway automation systems based on Markov processes is also presented. 

Safety of operation when motor vehicles stop at railway crossings in front of approaching train

2020 ◽  
pp. 39-42
Author(s):  
Anton Nikolaevich Popov ◽  
◽  
Sergey Yuryevich Grishaev ◽  
Keyword(s):  
Motor Vehicle ◽  
Motor Vehicles ◽  
Level Crossing ◽  
Full Stop ◽  
Automatic Level

The paper shows investigations of relationship between the length of approach sections of level crossing safety installation and braking distances of trains. It is established that the existing methods of calculating approach sections of automatic level crossing safety installation don’t guarantee, if necessary, a full stop of a train by braking before a crossing after it’s closure. The authors have formulated a condition when a train can be stopped before a closed crossing occupied by a motor vehicle. They have also carried out a verification of the existing automatic level crossing safety installation systems and established that such systems don’t comply the formulated condition, so the full stop of a train is not guaranteed. So, the authors have proposed measures on developing an algorithm of automatic level crossing safety installation operation for the control of automatic stop of a train before a crossing occupied by a motor vehicle. It is shown that the development of engineering is on a level sufficient for realization of this suggestions.

Estimation of Platform Waiting Time Distribution Considering Service Reliability Based on Smart Card Data and Performance Reports

2017 ◽  
Vol 2652 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Amr M. Wahaballa ◽  
Fumitaka Kurauchi ◽  
Toshiyuki Yamamoto ◽  
Jan-Dirk Schmöcker
Keyword(s):  
Travel Time ◽  
Waiting Time ◽  
Smart Card ◽  
Time Distribution ◽  
Goodness Of Fit ◽  
Likelihood Method ◽  
Service Reliability ◽  
Waiting Time Distribution ◽  
Smart Card Data ◽  
Performance Reports

The estimation of platform waiting time has so far received little attention. This research aimed to estimate platform waiting time distributions on the London Underground, considering travel time variability by using smart card data that were supplemented by performance reports. The on-train and ticket gate to platform walking times were assumed to be normally distributed and were matched with the trip time recorded by the smart cards to estimate the platform waiting time distribution. The stochastic frontier model was used, and its parameters were estimated by the maximum likelihood method. The cost frontier function was used to represent the relation between the travel time recorded in the smart card data as an output and the on-train time and walking time between the ticket gate and the platform as inputs. All estimated parameters were statistically significant, as shown by p-values. Comparing the travel time values estimated by the proposed model with the times recorded recorded in the smart card data shows a goodness-of-fit coefficient of determination of more than 95%. The estimation proved to have quick convergence and was computationally efficient. The results could facilitate improvements in transit service reliability analysis and passenger flow assignment. Matching the obtained distributions with the observed smart card data will help with estimating route choice behavior that can validate current transit assignment models.

Toxicology Elsewhere

1994 ◽  
Vol 13 (10) ◽  
pp. 716-719
Keyword(s):  
Professional Practice ◽  
Research Interest ◽  
Experimental Toxicology ◽  
New Material ◽  
Current Research Interest ◽  
Expert Commentary

The purpose of this section in Human and Experimental Toxicology is to draw attention to papers that are of significance to toxicologists but may be missed because, in the main, they have not been published in mainstream toxicology journals. In addition the papers selected attempt to reflect topics of the liveliest current research interest as well as those which impinge upon the professional practice of toxicology. In order to assist the assimilation of such new material an expert commentary is provided and because these aim to focus succinctly on the advance made they should also serve as mini-reviews to keep us all abreast of our rapidly developing, multi-disciplinary, subject.

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