scholarly journals Substantiation of Loading Hub Location for Electric Cargo Bikes Servicing City Areas with Restricted Traffic

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 839
Author(s):  
Vitalii Naumov
Keyword(s):  
Urban Areas ◽  
Facility Location Problem ◽  
Time Interval ◽  
Hub Location ◽  
Efficiency Criterion ◽  
Logistics Systems ◽  
Transport Services ◽  
Total Transport ◽  
Mode Of Transport ◽  
Python Programming

Electric cargo bicycles have become a popular mode of transport for last-mile goods deliveries under conditions of restricted traffic in urban areas. The indispensable elements of the cargo bike delivery systems are loading hubs: they serve as intermediate points between vans and bikes ensuring loading, storage, and e-vehicle charging operations. The choice of the loading hub location is one of the basic problems to be solved when designing city logistics systems that presume the use of electric bicycles. The paper proposes an approach to justifying the location of a loading hub based on computer simulations of the delivery process in the closed urban area under the condition of stochastic demand for transport services. The developed mathematical model considers consignees and loading hubs as vertices in the graph representing the transport network. A single request for transport services is described based on the set of numeric parameters, among which the most significant are the size of the consignment, its dimensions, and the time interval between the current and the previous requests for deliveries. The software implementation of the developed model in Python programming language was used to simulate the process of goods delivery by e-bikes for two cases—the synthetically generated rectangular network and the real-world case of the Old Town district in Krakow, Poland. The loading hub location was substantiated based on the simulation results from a set of alternative locations by using the minimum of the total transport work as the efficiency criterion. The obtained results differ from the loading hub locations chosen with the use of classical rectilinear and center-of-gravity methods to solve a simple facility location problem.

scholarly journals Service Quality and Satisfaction with City Bus Public Transport, Kota Kinabalu Sabah

2018 ◽  
Vol 7 (3.36) ◽  
pp. 78
Author(s):  
Abdullahi Ali Mohamed ◽  
Chong Yau Giou ◽  
Lawal Billa ◽  
Mohd. Ahmadullah Farooqi
Keyword(s):  
Low Income ◽  
Public Transport ◽  
Public Transportation ◽  
Traffic Congestion ◽  
Urban Areas ◽  
Income Group ◽  
City Bus ◽  
Transport Services ◽  
Bus Service ◽  
Mode Of Transport

The urban public transportation is an important network system that many urban residences have come to rely on for accessibility and linkage to key urban areas. Although in many urban centers, private transport services is also a preferred mode of transport for many people, however, the significance of public transport remains a perceived need of the city from the standpoint of efficient and timely link between urban areas, control of traffic congestion, and impact on the urban air quality. For the public to maintain their patronage in public transport, reasonable public satisfaction with the services offered is indispensable. Kota Kinabalu city bus is a government-operated bus company started in 2009, but is gradually loosing public interest with low patronage, resulting in increase in personal vehicle traffic. This study aims to understand the reasons for low user patronage of city bus service by investigating the efficiency and quality of service provided. Both quantitative and qualitative data were collected using questionnaire survey and open ended interview. Data is analyzed using inferential statistics analysis and factor analysis. Findings reveals that majority of the users are female of Malaysia nationality in age group 18-24 years and predominantly from low-income group. Overall users rated satisfaction is low because poor services in key area such as Disabled-friend Facility, Bus Network Coverage, Overcrowding and Vehicle Cleanliness. Comfort and Safety were also a major area of concern. It was evident from the study that the users are willing to pay more for improved quality City but. It can thus be inferred that the users of public bus service are not necessarily looking for cheap services but will appreciate improved services at the reasonable price  

Urban Transport

2018 ◽  
Author(s):  
José van
Keyword(s):  
Urban Areas ◽  
Urban Transport ◽  
Transport Sector ◽  
Public And Private ◽  
Transport Services ◽  
Ride Sharing ◽  
The World ◽  
Private And Public ◽  
Selection Mechanisms

Platformization affects the entire urban transport sector, effectively blurring the division between private and public transport modalities; existing public–private arrangements have started to shift as a result. This chapter analyzes and discusses the emergence of a platform ecology for urban transport, focusing on two central public values: the quality of urban transport and the organization of labor and workers’ rights. Using the prism of platform mechanisms, it analyzes how the sector of urban transport is changing societal organization in various urban areas across the world. Datafication has allowed numerous new actors to offer their bike-, car-, or ride-sharing services online; selection mechanisms help match old and new complementors with passengers. Similarly, new connective platforms are emerging, most prominently transport network companies such as Uber and Lyft that offer public and private transport options, as well as new platforms offering integrated transport services, often referred to as “mobility as a service.”

scholarly journals A framework for IoT-enabled environment aware traffic management

2021 ◽  
Vol 11 (1) ◽  
pp. 518
Author(s):  
Mohamed Fazil Mohamed Firdhous ◽  
B. H. Sudantha ◽  
Naseer Ali Hussien
Keyword(s):  
Traffic Congestion ◽  
Urban Areas ◽  
Traffic Management ◽  
Fine Particles ◽  
Environment Pollution ◽  
Negative Effects ◽  
Traffic Condition ◽  
Pollution Levels ◽  
Transport Services ◽  
The Cost

Vehicular traffic has increased across all over the world especially in urban areas due to many reasons including the reduction in the cost of vehicles, degradation of the quality of public transport services and increased wealth of people. The traffic congestion created by these vehicles causes many problems. Increased environment pollution is one of the most serious negative effects of traffic congestion. Noxious gases and fine particles emitted by vehicles affect people in different ways depending on their age and present health conditions. Professionals and policy makers have devised schemes for better managing traffic in congested areas. These schemes suffer from many shortcomings including the inability to adapt to dynamic changes of traffic patterns. With the development of technology, new applications like Google maps help drivers to select less congested routes. But, the identification of the best route takes only the present traffic condition on different road segments presently. In this paper the authors propose a system that helps drivers select routes based on the present and expected environment pollution levels at critical points in a given area.

scholarly journals MODELS OF PUBLIC TRANSPORT ORGANIZATION AND MANAGEMENT IN LITHUANIA AND FOREIGN COUNTRIES

2021 ◽  
Vol 13 (0) ◽  
pp. 1-10
Author(s):  
Justina Ranceva ◽  
Rasa Ušpalytė-Vitkūnienė
Keyword(s):  
Public Transport ◽  
Organization And Management ◽  
Sustainable Environment ◽  
Transport Services ◽  
Transport Organization ◽  
Management Scheme ◽  
Foreign Countries ◽  
Developing Cities ◽  
Mode Of Transport ◽  
Public Costs

Public transport is recognized as a more environmentally friendly mode of transport than cars for the same number of passengers. Many countries are investing heavily in public transport to make it not only greener, but also more convenient, more attractive, faster, more competitive and more accessible. In order to promote a sustainable environment, private, public and non-motorized transport must functionally complement each other to form balanced integrated systems. There are currently two main forms of organizing public transport: a government-oriented service and a market-oriented service. Positive changes in the field of public transport are possible if in the process involves not only state and municipal institutions, but also infrastructure planners, passenger carriers and inhabitants. Public transport must be seen as a means of developing cities and regions. The aim of the article is to analyze the existing models of public transport organization and management, to compare them and submit a proposal, on the basis of which management model it would be possible to submit proposals for the improvement of the organization of Lithuanian public transport. Good foreign countries practice in the management and organization of public transport shows that in some countries public transport is already organized not by individual municipalities but by regions. Based on the achievements of foreign countries, municipalities are recommended to cooperate and share experience in creating a common public transport network. It is necessary to create a management scheme in Lithuania for the development of public transport services, which at the same time would reduce public costs.

scholarly journals KGPMH: A hybrid approach for solving a novel facility location problem

2021 ◽  
Author(s):  
Maryam DehghanChenary ◽  
Arman Ferdowsi ◽  
Fariborz Jolai ◽  
Reza Tavakkoli-Moghaddam
Keyword(s):  
Mathematical Model ◽  
Location Problem ◽  
Hybrid Approach ◽  
Facility Location Problem ◽  
Evaluation Function ◽  
Genetic Approach ◽  
Hub Location ◽  
Hub Location Problem ◽  
Proposed Model ◽  
The Impact

<pre>The focus of this paper is to propose a bi-objective mathematical model for a new extension of a multi-period p-mobile hub location problem and then to devise an algorithm for solving it. The developed model considers the impact of the time spent traveling at the hubs' network, the time spent at hubs for processing the flows, and the delay caused by congestion at hubs with specific capacities. Following the unveiled model, a hybrid meta-heuristic algorithm will be devised that simultaneously takes advantage of a novel evaluation function, a clustering technique, and a genetic approach for solving the proposed model.</pre>

scholarly journals The prevalence of gastroesophageal reflux disease and its association with various risk factors in a tertiary care centre in West Bengal

2021 ◽  
Vol 9 (3) ◽  
pp. 780
Author(s):  
Anant Parasher ◽  
Kunal Ranjan
Keyword(s):  
Gastroesophageal Reflux Disease ◽  
Gastroesophageal Reflux ◽  
Reflux Disease ◽  
Urban Areas ◽  
West Bengal ◽  
Past History ◽  
Tertiary Care ◽  
Time Interval ◽  
Number Of Patients ◽  
Study Population

Background: Gastroesophageal Reflux (GER) is the regurgitation of gastric contents and acid into the esophagus. Frequent and abnormal amounts of reflux leads to Gastroesophageal reflux disease (GERD) which causes symptoms like heartburn, regurgitation, and /or other complications. In view of absence of any data on the prevalence of GERD from this part of India, the current population based study was conducted to study the prevalence of GERD and its association with various risk factors.Methods: In this community based prospective cross-sectional observational study, 500 patients from rural and urban areas of West Bengal were included during the one year period from July 2014 to June 2015.Results: Out of a total of 500 patients studied, the percentage of patients with GERD in our study population was found to be 31.3%. Out of 292 males enrolled for the study, number of patients with GERD was 66 (22.6%) as compare to females where the same was found to be 43.26% (90/208). The majority (68.2%) of patients had mild GERD, 18.5% had moderate GERD whereas only 13.3% of patients had severe GERD.Conclusions: The percentage of patients with GERD in our study population was found to be 31.3%. It was observed to be significantly associated with increasing Body Mass Index (B.M.I), smoking, the female gender, a sedentary lifestyle, dinner to bed-time interval of ≤2 hours, chronic NSAID use, and a past history of abdominal surgery.

scholarly journals The impact of asymmetry on equilibrium of logistics systems

2019 ◽  
Vol 294 ◽  
pp. 06004
Author(s):  
Irina Savelieva ◽  
Serhij Melnikov ◽  
Alexandra Orlovska
Keyword(s):  
Information Asymmetry ◽  
Systems Design ◽  
Theory And Practice ◽  
New Approach ◽  
Asymmetry Of Information ◽  
Logistics Systems ◽  
Transport Services ◽  
Quality Of Products ◽  
The Impact

The article examines one of the actual problems of the theory and practice of the logistics systems functioning related to the asymmetry of information in the transport services market. Assessing the level of asymmetry in logistics systems is of fundamental importance to increase the competitiveness of relevant systems. New approach formulated herein estimates the logistics systems asymmetry by taking into account information asymmetry about the quality of transport products, as well as information asymmetry about the quality of products within the boundaries of the corresponding supply chain. This approach allows to take into account its potential capabilities and increase functional stability in the process of logistics systems design.

scholarly journals Persistency of Chlorpyrifos and Termiban (Imidacloprid) in soil against subterranean termites

2018 ◽  
Vol 50 (2) ◽  
Author(s):  
B. Hassan ◽  
S. Ahmed ◽  
M.A. Ejaz
Keyword(s):  
Weight Loss ◽  
Urban Areas ◽  
Subterranean Termites ◽  
Time Interval ◽  
Treated Soil ◽  
Different Types

Subterranean termites are considered to be one of the most destructive termites in urban areas in Pakistan. Different types of insecticides have been used to control subterranean termites. The present studies were conducted to evaluate the comparative persistency and effectiveness of Termiban (imidacloprid 5 SC) and Chlorpyrifos (40 EC) against subterranean termites in the three type of soils (sand, silt and clay) at different time interval. Two different concentrations (100 and 200 ppm) of selected insecticides were prepared and applied to soil in petri plates and termite were released at different time interval to record mortality. Results showed that at each time interval and concentration, mortality of termite was non-significantly different for both insecticides. When persistency of insecticides was tested under closed condition, results showed that lowest weight loss (8.60%) of wood was observed in Termiban treated soil at 200 ppm which was significant different from rest of the treatments. Similarly, under open conditions, at each time interval, there was significant more mortality of termites in soil treated with Termiban compared to Chlorpyrifos.

Innovative Mobility Solutions in Rural Areas With Case Studies

2020 ◽  
pp. 156-209 ◽  
Author(s):  
Marian Gogola ◽  
Dana Sitányiová
Keyword(s):  
Social Change ◽  
Health Services ◽  
Case Studies ◽  
Rural Areas ◽  
Urban Areas ◽  
Transport Services ◽  
Innovative Solutions ◽  
Important Challenge

Rural areas still have some disadvantages in comparison to urban areas. Access to jobs, education, or health services provided for inhabitants in rural areas are limited. Another important topic is mobility, which is crucial to meet the travel expectations of inhabitants in rural areas. Finding new forms of mobility capable of covering all areas and meeting the requirements of rural inhabitants is the most important challenge. This chapter deals with mobility in rural areas from the perspective of demographics, social change, and accessibility to transport services. Moreover, this chapter offers various case studies dealing with innovative solutions for mobility in rural areas resulting from the RUMOBIL project.

scholarly journals Sentinel-1 Data for Underground Processes Recognition in Bucharest City, Romania

2020 ◽  
Vol 12 (24) ◽  
pp. 4054
Author(s):  
Alina Radutu ◽  
Guri Venvik ◽  
Traian Ghibus ◽  
Constantin Radu Gogu
Keyword(s):  
Urban Planning ◽  
Urban Areas ◽  
Dynamic Instability ◽  
Thick Layer ◽  
Urban Groundwater ◽  
Time Interval ◽  
Persistent Scatterer Interferometry ◽  
Aquifer System ◽  
Urban Planning And Design ◽  
Bucharest City

Urban areas are strongly influenced by the different processes affecting the underground and implicitly the terrestrial surface. Land subsidence can be one of the effects of the urban processes. The identification of the vulnerable areas of the city, prone to subsidence, can be of great help for a sustainable urban planning. Using Sentinel-1 data, by the PSI (persistent scatterer interferometry) technique, a vertical displacements map of Bucharest city has been prepared. It covers the time interval 2014–2018. Based on this map, several subsidence areas have been identified. One of them, holding a thick layer of debris from urban constructions, was analyzed in detail, on the basis of an accurate local geological model and by correlating the local displacements with the urban groundwater system hydraulic heads. The properties of the anthropogenic layer have been characterized by complementary geotechnical and hydrogeological studies. A dynamic instability pattern, highlighted by PSI results, has been put into evidence when related to this type of anthropogenic layer. This thick anthropogenic layer and its connections to the urban aquifer system have to be further analyzed, when the procedures of urban planning and design invoke constructive operations modifying the aquifer dynamics.

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