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Article
Publication date: 11 April 2016

Ming Qiu, Yanwei Miao, Yingchun Li, Long Chen, Rensong Hu and Jianjun Lu

The fabric self-lubricating liners are the key factors impacting the performances of self-lubricating spherical plain bearings. The purpose of this paper is to improve the…

Abstract

Purpose

The fabric self-lubricating liners are the key factors impacting the performances of self-lubricating spherical plain bearings. The purpose of this paper is to improve the friction and wear properties of self-lubricating radial spherical plain bearings by modification of the liners.

Design/methodology/approach

The liners of hybrid woven PTFE/Kevlar fabrics were treated respectively by the LaCl3 and CeO2 solutions. The tribological properties of self-lubricating spherical plain bearings with treated or untreated liners under continuous swaying conditions were investigated with the bearing tester at the swaying frequency of 2.5 Hz and the swaying angle of ±10°. The film formation and wear mechanisms were analyzed based on the observation of worn surfaces with a scanning electron microscope (SEM) and an energy dispersive spectrometer (EDS).

Findings

Results show that the tribological properties of the bearings treated by the LaCl3 or CeO2 solution were improved compared with those of the untreated bearings. In particular, the wear resistance of bearings treated by the CeO2 solution was remarkably improved under higher swaying cycles, but the anti-friction properties and cooling effects of bearings treated by the LaCl3 solution were better under lower swaying cycles. Through SEM analysis, the reasons were analyzed. The bearings with treated liners only produced slight adhesive and abrasive wear, but the bearings with untreated liners produced more serious adhesive and abrasive wear under higher swaying cycles.

Originality/value

The paper proposed a new pretreatment process for the self-lubricating liners. The investigation on the friction and wear behaviors of the bearings is beneficial for prolonging the service lives of the radial spherical plain bearings.

Details

Industrial Lubrication and Tribology, vol. 68 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 29 October 2019

Chao Zhen Yang, Zhiwei Guo and Changkun Xu

Frictions in cylinder liner-piston ring often cause an inevitable loss of energy loss in the diesel engine. This study aims at evaluating the effect of depths in the cylinder…

139

Abstract

Purpose

Frictions in cylinder liner-piston ring often cause an inevitable loss of energy loss in the diesel engine. This study aims at evaluating the effect of depths in the cylinder liner groove texture on friction, wear and sealing performances.

Design/methodology/approach

Five depths of groove texture cylinder liners (50, 100, 150, 200, 250 µm) were fabricated, and experiments were carried out using a special-purpose diesel engine tester. Comparative analyses of cylinder liner contact resistances, piston ring wear losses and surface appearances were conducted with respect to different surface textures and applied loads.

Findings

Under no-load conditions, the cylinder liner with a 100 deep thread groove can significantly improve sealing and optimize its lubrication performance. On the other hand, the sealing is highly correlated with the depth of groove and the load within the cylinder liner. Under loaded conditions, the thread groove has less effect on the sealing performance.

Originality/value

The findings can provide feasible basis for the tribological design and production of diesel engines.

Details

Industrial Lubrication and Tribology, vol. 72 no. 3
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 July 1967

THE equipment illustrated was used by R. W. Avery and J. G. Hoffman, of General Electric Company, Erie, Pa., to investigate the problem of cylinder liner scuffing, and their…

Abstract

THE equipment illustrated was used by R. W. Avery and J. G. Hoffman, of General Electric Company, Erie, Pa., to investigate the problem of cylinder liner scuffing, and their results were presented in a paper to the ASME's Diesel and Gas Engine Power Conference at Chicago, 23–27 April, 1967. The liner specimens were cut from full size cylinders and ring segments, one inch long, were cut from full size rings and mounted rigidly so they could not tip. The feature of this rig is that the liner slope and curvature provides four different lubrication conditions for each test, and practical operating conditions were very well simulated. Loads, simulating ring loads, to a maximum of 5,100 p.s.i. were applied through an expandable ring carrier. The higher loads were above normal operating values, but were used to approximate imperfect ring and liner fit, as might occur during break‐in or with liner temperature distortion. Water cooling on the outer side of the liner maintained gross temperatures at values observed in operating diesel engines. Speed was constant at 650 r.p.m. making average surface speed 325 ft/min. and maximum speed 510 ft/min. Ring and liner temperatures were measured, the point of measurement of the former being 0.020 in. back from the contact face and in the latter 5/16 in. from the liner inner surface. Friction between a pair of rings and their liner was measured by a strain‐gauged transducer at the top end of each liner and was recorded by an oscilloscope and camera. Ring contact or loss of full oil‐film support was measured by electrical continuity of a 15 v. 50‐microamp. limited circuit.

Details

Industrial Lubrication and Tribology, vol. 19 no. 7
Type: Research Article
ISSN: 0036-8792

Content available
Article
Publication date: 18 January 2024

Stefania Kollia and Athanasios A. Pallis

Container liner shipping companies started expanding their business by investing in container port terminals in the late 1990s. This market entry results in an extensive presence…

Abstract

Purpose

Container liner shipping companies started expanding their business by investing in container port terminals in the late 1990s. This market entry results in an extensive presence of vertically integrated liners and terminals. This study aims to explore the competition effects of this vertical integration trend based on a regional (European) analysis. In particular, it extracts lessons from the European Commission (EC) cases on the competition effects of vertical integration. The critical analysis of the cases examined at the institutional level intends to reach conclusions on whether liner–terminal vertical integration harmed or advanced competition in the relevant markets and/or the extent that there is a need to revise the current policy practices.

Design/methodology/approach

This study critically assesses the EC’s decisional practices in port container terminal vertical mergers in the last 25 years (1997–2021). Based on a literature review comparing maritime and competition economists' perspectives, it reviews the types of mergers examined, the methodology followed for relevant market definition and calculation of market shares and the estimated competition effects. The Hamburg–Le Havre area is the port range used as a case study for comparing the decisional practice with actual market developments. These container ports serve the greatest consuming market of final and intermediate goods in Europe and are gateways to Central and Eastern Europe.

Findings

The assessment identifies a need for expanding the investigation as a precondition for reaching conclusions on both the anti- and pro-competitive effects. First, only a limited number of transactions have been notified to the EC. Second, the empirical research identified a gap in this process, as there were no decisions (phase I) on vertical mergers between 2008 and 2016. Third, the exante assessment has not applied a phase II in-depth analysis to any case due to the absence of competition concerns. Finally, due to the absence of complaints, there is a lack of any ex post assessment of the effects of vertical integration.

Research limitations/implications

This assessment is important for understanding the current and emerging features of intra-port and inter-port competition and the potential effects that the continuation and expansion of liner companies' vertical integration strategies will have along maritime supply chains. It also contributes to the broader discussion on liner companies' strategies, such as the research and policy-making efforts around the globe to understand the impact of both vertical and horizontal integration.

Practical implications

These discussions are critical for a diversity of businesses that use liner shipping services or provide facilities and services to container shipping lines or ports. They are important for the interests of customers and consumers as they could inform any needed re-visiting of competition policy to protect from the dominance of any market developments that would lead to conditions limiting competition. Expanding analysis on the competition effects of non-notified mergers would help a better understanding of market changes.

Social implications

Enhancing competition and limiting monopolies is valuable from a consumer's perspective. This is more so in the case of maritime trade that serves the needs of societies. The study contributes by generating a better understanding of how decision-makers have worked towards that direction and what realignments are worthy.

Originality/value

There are no previous comprehensive reviews and analyses of the ways that policy-makers at the regional level have addressed the competition effects of vertical integration strategies of liner shipping companies when enhancing competition is valuable from a consumer perspective. Comparing maritime economists and competition, the study, via its literature review, also offers a comparison of maritime and competition perspectives on these competition effects, allowing positioning of how effective decisional-making practices have been.

Details

Maritime Business Review, vol. 9 no. 1
Type: Research Article
ISSN: 2397-3757

Keywords

Article
Publication date: 17 April 2007

Ray W. Coye and Patrick J. Murphy

The paper seeks to explore lessons in service delivery from an industry that no longer exists. The transatlantic passenger liner dramatizes some of the most unique challenges of…

1303

Abstract

Purpose

The paper seeks to explore lessons in service delivery from an industry that no longer exists. The transatlantic passenger liner dramatizes some of the most unique challenges of service delivery. The ship itself was a delivery mechanism completely separated from support services. Customers were essentially contained for extended periods. Whereas all customers received the same core transportation service, peripheral services varied substantially by service class.

Design/methodology/approach

Description of the historical context is followed by examinations of passenger and service provider perspectives to illustrate services expected and delivered. Primary and secondary source material is used to exemplify service management challenges.

Findings

Socioeconomic and technological factors played major roles in delivery system design decisions. With stable and loyal workforces and well designed delivery systems, ocean liners were able to deliver service successfully to customer classes with widely varying expectations.

Practical implications

Service management on ocean liners occupied a range of levels and intensity not found in current organizational contexts. The context provides modern practitioners pure consideration of complexities and service management implications.

Originality/value

The novel and isolated organizational aspects of transatlantic ocean liners is unique among organizations. Examination of service management in this context provides information of original value not available from examination of other kinds of organizations.

Details

Journal of Management History, vol. 13 no. 2
Type: Research Article
ISSN: 1751-1348

Keywords

Open Access
Article
Publication date: 31 December 2013

Eon-Seong Lee

This study aims to develop a competitive dynamics model of container shipping liners, one which examines how inter-firm network embeddedness would affect inter-firm rivalry such…

Abstract

This study aims to develop a competitive dynamics model of container shipping liners, one which examines how inter-firm network embeddedness would affect inter-firm rivalry such as the likelihood of a competitive action of a focal firm and the likelihood of its rivals’ response and how the inter-firm rivalry then has an influence on the market share of the focal firm. Structural and relational network embeddedness between a focal firm and its competitors would be investigated as drivers of the likelihood of the competitive action and response. The theoretical framework on the relationship between network embeddedness, inter-firm rivalry and market share in the liner shipping industry will be developed and relevant propositions are then suggested in relation to the model. This attempt may provide meaningful insights for managers and academic researchers into the key factors which affect the inter-firm rivalry between shipping liners and may also detail the impact of inter-firm rivalry on the focal firm’s market share. This research would therefore contribute to the development of the competitive strategy of container shipping companies so as to help them strategically manage their rivals’ competitive behaviors and maximize their market share.

Details

Journal of International Logistics and Trade, vol. 11 no. 3
Type: Research Article
ISSN: 1738-2122

Keywords

Content available
Article
Publication date: 8 June 2018

Hang Fa Tong and Hong Yan

This paper examines the possible cooperation options in terms of empty container repositioning across alliances for shipping lines based in the Greater China Region (China, Taiwan…

2128

Abstract

Purpose

This paper examines the possible cooperation options in terms of empty container repositioning across alliances for shipping lines based in the Greater China Region (China, Taiwan and Hong Kong SAR), after the three global shipping alliances reformed in April 2017.

Design/methodology/approach

This paper offers a comprehensive review to the latest shipping alliances and introduces a new cooperative dimension among shipping lines based in the Greater China Region which are member of different shipping alliances.

Findings

Cooperation among shipping lines in the Greater China Region in terms of empty container handling is possible in terms of resource sharing among shipping lines across alliances that fosters mega shipping line formation in the future.

Practical implications

Shipping lines should review their current empty container repositioning strategies and explore cooperation among non-alliance members having headquarters in proximity for quick responsiveness in empty container repositioning plan and execution.

Originality/value

This is a research directly analyzing the empty repositioning plan of the major shipping lines and their major service routes, fleet and containers.

Details

Maritime Business Review, vol. 3 no. 1
Type: Research Article
ISSN: 2397-3757

Keywords

Article
Publication date: 15 June 2015

Kum Fai Yuen and Vinh Van Thai

– This paper aims to identify the dimensions of service quality (SQ) in liner shipping and examine their effects on customer satisfaction.

10423

Abstract

Purpose

This paper aims to identify the dimensions of service quality (SQ) in liner shipping and examine their effects on customer satisfaction.

Design/methodology/approach

The indicators of SQ in liner shipping were identified from reviewing the literature and interviewing six qualified industry practitioners. An online survey was then administered to 183 liner shippers in Singapore. Subsequently, exploratory factor analysis and regression analysis were conducted.

Findings

SQ in liner shipping can be represented by four key quality dimensions. In descending order of their impact on customer satisfaction, they are reliability, speed, responsiveness and value. Service differentiation by time-related attributes results in greater customer satisfaction than practising cost leadership in liner shipping.

Research limitations/implications

Allocation of resources to develop SQ in liner shipping should mirror the priorities established in this research. In addition, the developed measurement model for SQ can serve as a reference for liner shipping firms to assess the quality of their services.

Originality/value

A parsimonious and updated set of variables can now be used to represent SQ in the liner shipping sector. The paper also identifies the key drivers of customer satisfaction in liner shipping.

Details

International Journal of Quality and Service Sciences, vol. 7 no. 2/3
Type: Research Article
ISSN: 1756-669X

Keywords

Content available
Article
Publication date: 22 November 2019

Rong-Her Chiu

The first well-known liner shipping conference was created for the UK/Calcutta trade in 1875. However, the European Union (EU) decided to abolish repeal the liner conferences…

Abstract

Purpose

The first well-known liner shipping conference was created for the UK/Calcutta trade in 1875. However, the European Union (EU) decided to abolish repeal the liner conferences system with effect from October 18 2008. This paper aims to study the governing regulations on shipping conferences in Taiwan along with investigating the impact on the EU to repeal conferences. The regulation on liner conferences in the USA is also briefly referred.

Design/methodology/approach

Literature review and questionnaire survey are used to conduct the study. This paper reviews important literature relating to the EU to repeal the conferences system and its impact on liner market competition to/from European trade routes, with discussions on the US and Taiwan regulations on shipping conferences. Questionnaire survey data, collected from published report and this research present shippers’ and carriers’ responses on the changes of regulations on liner conferences.

Findings

Shippers are strongly supporting the repeal of the conferences system. Academic research results basically reveal that the liner market will be more competitive in the trades to/from the USA and the EU after the repeal of the conferences. For Taiwan, its regulations are rather simple and loosely control over the liner conferences; therefore, if the shipping administration intends to enhance the inspection of the agreements of conferences and strategic alliances, more detailed regulations should be prepared, and the provisions of the EU or USA would be a good reference.

Practical implications

Through the discussions on the legal treatments of shipping conferences from the USA, the EU and Taiwan perspectives, this paper provides shipping researchers with not only a clear evolution of the liner conferences but also a deep understanding of the impact to repeal the conferences on liner market competition.

Originality/value

This paper reviews important literature and related legislations on liner conferences including the USA, the EU and Taiwan. The different responses on the EU to repeal the conferences system from shippers and carriers are discussed. The impact on liner market competition is presented.

Details

Maritime Business Review, vol. 4 no. 4
Type: Research Article
ISSN: 2397-3757

Keywords

Open Access
Article
Publication date: 31 December 2015

REZA Mohamad, SUTHIWARTNARUEPUT Kamonchanok and PORNCHAIWISESKUL Pongsa

Liner connectivity plays an important role as a determinant in how a country is able to gain access to world markets. Liner shipping as the medium of seaborne transport for import…

Abstract

Liner connectivity plays an important role as a determinant in how a country is able to gain access to world markets. Liner shipping as the medium of seaborne transport for import and export of manufactured and semi-manufactured goods plays a significant part in international trade, which in turn potentially contribute towards the prosperity of a country and its surrounding region. Liner Shipping Connectivity Index (LSCI) is one of the most common benchmark to see how well connected a country in global trade, where it consists of five components, namely the number of ships, carrying capacity, ship size, services provided, and the number of companies that deploy container ships calling a country’s ports. This paper aims to tally from the most to the least which LSCI component contributes in improving the shipping connectivity with the most impact, in six Maritime South-East Asian countries, i.e., Indonesia, Malaysia, Philippines, Singapore, Thailand, and Vietnam. By descriptive statistics, correlation analysis, and panel data, this paper finds that the country port’s capacity to accept larger ship size provides the most significant impact towards the improvement of the connectivity in the region. To attract companies to deploy largest ship, the improvement needs to be complemented with the capacity that can meet the expected volume, offering a variety of service, and good turnaround speed at the country’s port. The paper is expected to present not only indicative recommendations on which logistics connectivity initiative needs to be invested first, but also necessary proposals to develop a programme for building the region’s overall logistics industry.

Paper Code: SLC-206

Details

Journal of International Logistics and Trade, vol. 13 no. 3
Type: Research Article
ISSN: 1738-2122

Keywords

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