Transport and Telecommunication Journal最新文献_第8页

Research of an Influence of a Traffic Flow Movement Intensity Change on the Possibility of Nonstop Passage of the Traffic Lights Objects 交通流运动强度变化对红绿灯目标不间断通过可能性的影响研究

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-04-01 DOI: 10.2478/ttj-2022-0012

P. Mazyliuk, O. Sitovskyi, O. Prentkovskis, V. Dembitskyi, I. Murovanyi, Y. Bulik

引用次数: 0

A Public Value-Based, Multilevel Evaluation Framework to Examine Public Bike-Sharing Systems. Implications for Cities’ Sustainable Transport Policies 基于公共价值的公共自行车共享系统多层次评估框架。城市可持续交通政策的启示

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-04-01 DOI: 10.2478/ttj-2022-0016

Aldona Podgórniak-Krzykacz, Justyna Przywojska, Justyna Trippner-Hrabi

引用次数: 4

Social Distance Evaluation in Transportation Systems and Other Public Spaces using Deep Learning 基于深度学习的交通系统和其他公共空间的社会距离评估

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-04-01 DOI: 10.2478/ttj-2022-0014

M. Guerrieri, G. Parla

引用次数: 0

Efficiency of Ship Operation in Transportation of Oversized and Heavy Cargo by Optimizing the Speed Mode Considering the Impact of Weather Conditions 考虑天气条件影响的航速模式优化对船舶大件重货运输效率的影响

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0007

S. Onyshchenko, O. Melnyk

{"title":"Efficiency of Ship Operation in Transportation of Oversized and Heavy Cargo by Optimizing the Speed Mode Considering the Impact of Weather Conditions","authors":"S. Onyshchenko, O. Melnyk","doi":"10.2478/ttj-2022-0007","DOIUrl":"https://doi.org/10.2478/ttj-2022-0007","url":null,"abstract":"Abstract Prior to commencing the voyage planning procedure, the entire navigation area on the forthcoming passage should be divided into several sections, depending on various factors, such as traffic density, restricted depths, availability of ship reporting systems, hydrometeorological conditions, high risk navigation areas in order to outline measures to ensure the safety of ship’s navigation. In addition, these factors have direct impact on the ship’s speed during the voyage. On the other hand, slow steaming can reduce fuel consumption on the same section of the route by 10-15%. Reducing the ship’s speed can significantly minimize its operating costs. However, when choosing economically feasible ship’s speed it should be kept in mind that reducing the speed can lead to a significant decrease in the number of voyages per year and, consequently, to the reduction of annual freight income. Therefore, a practically important and relevant problem is the necessity to find the speed of ship operation, which will provide a balance between economical fuel consumption and profits from ship operation. The classic approach to optimizing the speed mode of ships is based on the cubic dependence of fuel consumption on speed. Therefore, depending on the distance between ports, the duration of the voyage and the conditions for the time of arrival of the ship to the port, in the modern publications were proposed approaches to the optimization of the speed mode, based on the additional income or time-charter equivalent.","PeriodicalId":44110,"journal":{"name":"Transport and Telecommunication Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84040957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Occupancy Estimation at Bus Stops Through Wi-Fi Connectivity Assessment – A Study in Guayaquil City 通过Wi-Fi连接评估估算公交车站的占用率——在瓜亚基尔市的一项研究

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0009

Viviana Mero Cheme, Martin Herrera Martinez, Rayner Durango, V. S. Padilla

引用次数: 0

A New Method to Boost VoIP Performance Over IPv6 Networks 一种提高IPv6网络VoIP性能的新方法

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0006

Mosleh M Abualhaj, Sumaya N. Al-Khatib

{"title":"A New Method to Boost VoIP Performance Over IPv6 Networks","authors":"Mosleh M Abualhaj, Sumaya N. Al-Khatib","doi":"10.2478/ttj-2022-0006","DOIUrl":"https://doi.org/10.2478/ttj-2022-0006","url":null,"abstract":"Abstract The demands on virtual communication have increased noticeably during the COVID-19 pandemic lockdown. As an essential part of virtual communication, VoIP should be promoted to achieve the desired level of performance. One critical area investigated in VoIP is the bandwidth utilization (BWU) of the VoIP over IPv6 networks. Enhancing BWU will impact call capacity and quality; it increases call capacity and boosts call quality. Unfortunately, a considerable amount of bandwidth is wasted when running VoIP over IPv6 networks. This is due to the large size of the IPv6 header and the small size of the speech frame. This paper proposes a new method to handle the inefficient BWU when running VoIP over IPv6 networks. The proposed method combines multiplexing multiple VoIP packets in one IPv6 header and using the superfluous fields to carry a portion of the speech frame. Therefore, the proposed is called packet multiplexing and carrier fields (PMCF). Investigation of the PCMF method has been done using four metrics to measure the promotion in BWU, namely calls capacity, header size, bandwidth saving, and speech frame shortening metrics. With the four metrics, the PMCF method has outperformed the comparable methods. For instance, the call capacity has been promoted by up to 269% compared to the typical IPv6 method in the tested scenarios. Therefore, the PMCF method is a feasible solution to facilitate the BWU of VoIP when running VoIP over IPv6 networks.","PeriodicalId":44110,"journal":{"name":"Transport and Telecommunication Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78365702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Method of Improving Incomplete Spatial-Temporal Data in Inland Navigation, on the Basis of Industrial Camera Images – West Oder River Case Study 基于工业相机影像的内河航运不完全时空数据改进方法——以西奥得河为例

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0005

G. Stępień, Artur Kujawski, A. Tomczak, R. Hałaburda, K. Borczyk

引用次数: 0

Modeling of Mobile and Fixed Broadband Subscriptions of Countries with Fractional Calculus 用分数阶微积分对国家移动和固定宽带用户进行建模

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0001

Nisa Özge Önal Tuğrul, Cennet Başer, Esra Ergün, K. Karaçuha, V. Tabatadze, S. Eker, E. Karaçuha, Kevser Şimşek

{"title":"Modeling of Mobile and Fixed Broadband Subscriptions of Countries with Fractional Calculus","authors":"Nisa Özge Önal Tuğrul, Cennet Başer, Esra Ergün, K. Karaçuha, V. Tabatadze, S. Eker, E. Karaçuha, Kevser Şimşek","doi":"10.2478/ttj-2022-0001","DOIUrl":"https://doi.org/10.2478/ttj-2022-0001","url":null,"abstract":"Abstract Today, operators have become the resource of telecommunications data. Therefore, knowledge about subscriptions is easily available for most countries. In recent years, high-speed mobile internet access subscriptions are also increasing rapidly. There are two important subscriptions reviewed by The International Telecommunication Union (ITU): mobile broadband (MBB) subscriptions and Fixed broadband (FBB) subscriptions. In this study, we proposed an original mathematical model employing the fractional analysis theory and evaluate its validity by modeling the mobile broadband and fixed broadband subscriptions of six countries including France, Italy, Turkey, Germany, Spain, and the U.K. Later, we compared the Fractional Model we developed with the Polynomial Model. The results show that the Fractional Model is superior to the conventional Polynomial Model in modeling broadband subscriptions. For all selected countries, our proposed Fractional approach outperforms conventional polynomial regression. For all investigation categories, on average, the fractional approach works better by at least 10% and at most 30%.","PeriodicalId":44110,"journal":{"name":"Transport and Telecommunication Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74468157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Reliable and Seamless Communications of Networked IAV in Container Terminal Using UAV Technology 利用无人机技术实现集装箱码头联网无人机的可靠无缝通信

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0004

Nacera Bahnes, Bouabdellah Kechar, H. Haffaf

{"title":"Reliable and Seamless Communications of Networked IAV in Container Terminal Using UAV Technology","authors":"Nacera Bahnes, Bouabdellah Kechar, H. Haffaf","doi":"10.2478/ttj-2022-0004","DOIUrl":"https://doi.org/10.2478/ttj-2022-0004","url":null,"abstract":"Abstract Managing container loading and unloading operations at a container terminal using Intelligent Autonomous Vehicle (IAV) is challenging, especially at intersections in the yard, which are often inevitable. For ensuring efficient and accident-free management of these intersections, the IAV must cooperate by exchanging messages. Due to signal obstruction at these intersections, indirect communication is established through an additional relay node to ensure reliable communication. This paper proposes distributed approach using Unmanned Aerial Vehicle (UAV) connectivity to avoid collision and deadlock between IAV at intersections. Due to the obstacles formed by stacked containers blocking the radio transmissions, the proposed algorithm automatically switches the ongoing communication through the UAV to ensure successful communication at intersections. Thus, the idea of introducing UAV as communication relay in a container terminal is an interesting solution that we have adopted in this work. Simulation techniques are used to evaluate our proposal. The obtained results confirm that our UAV-based approach ensures reliable communication and automated intersections management in the yard while further ensuring the safety of IAV traffic.","PeriodicalId":44110,"journal":{"name":"Transport and Telecommunication Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86886951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Ammonia as Clean Shipping Fuel for the Baltic Sea Region 氨作为波罗的海地区的清洁航运燃料

IF 1.4

Transport and Telecommunication Journal Pub Date : 2022-02-01 DOI: 10.2478/ttj-2022-0010

L. Gerlitz, Eike Mildenstrey, G. Prause

{"title":"Ammonia as Clean Shipping Fuel for the Baltic Sea Region","authors":"L. Gerlitz, Eike Mildenstrey, G. Prause","doi":"10.2478/ttj-2022-0010","DOIUrl":"https://doi.org/10.2478/ttj-2022-0010","url":null,"abstract":"Abstract The international shipping industry transports about 90 per cent of the global trade volume and is responsible for only two per cent of the anthropogenic carbon dioxide emissions. Consequently, the shipping sector is considered as an environmentally friendly transport mode. Nevertheless, global shipping can also improve its environmental footprint. So that in recent years clean shipping initiatives have been placed on the political agenda with the implementation of the Sulphur Emission Control Area (SECA) and Nitrogen Emission Control Area (ECA) regulations and the Global Cap. The next target of the International Maritime Organisation (IMO) in the sequel of the Paris Agreement of climate protection is dedicated to reduction of the Greenhouse Gas (GHG) emissions by up to 50 % until the year 2050. The paper investigates and discusses the research questions to what extent ammonia can be used in Baltic Sea Region (BSR) to propel merchant vessels and how ammonia can fulfil future demands under technical, economic and infrastructural aspects to become the green fuel for the Baltic Sea Region (BSR) shipping industry. The study benchmarks the properties of ammonia as marine fuel against Marine Gas Oil (MGO) and Liquified Natural Gas (LNG). The research is based on secondary data analysis that is complemented by expert interviews and case studies, and the results are empirically validated by data that were collected during the EU projects “EnviSuM”, “GoLNG”, “CSHIPP” and “Connect2SmallPorts” that took place within the last four years in the BSR.","PeriodicalId":44110,"journal":{"name":"Transport and Telecommunication Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91326595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7