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Article
Publication date: 1 February 1991

S. Kiyota, T. Koizumi and S. Kobayashi

This paper presents a new roll‐to‐roll (R‐R) production system modified for fine line patterning of flexible printed circuits (FPCs) using the subtractive method. The R‐R system…

Abstract

This paper presents a new roll‐to‐roll (R‐R) production system modified for fine line patterning of flexible printed circuits (FPCs) using the subtractive method. The R‐R system is especially suited to production of FPCs because the material used—copper‐clad laminate (CCU—can be handled as it is rolled. Consideration has been given to methods and materials in designing the machines. They are now operating successfully and are used in single‐sided flexible circuit manufacture. A liquid photosensitive etch resist and a collimated light source are recommended for the system and several factors necessary for achieving R‐R working conditions are discussed. Judging from the experimental results of these systems, using narrower width materials with chemical surface preparation is an effective technique for improving the yield rate. The selection of a liquid photoresist is not so common in the case of rigid printed circuit boards because of the difficulty of the coating process. On the other hand, in the case of flexible PCBs, it is successful not only in terms of resolution characteristics but also of productivity under several different types of coating conditions. It should be noted that use of the conventional subtractive method in the printed circuit field is still advantageous as some semiconductor technologies are applicable.

Details

Circuit World, vol. 17 no. 3
Type: Research Article
ISSN: 0305-6120

Article
Publication date: 4 April 2008

Yasuhiko Watanabe, Ryo Nishimura and Yoshihiro Okada

This paper aims to report a QA system that can answer how‐type questions based on confirmed knowledge acquired from mails, posted to a mailing list. It aims to propose a method of…

Abstract

Purpose

This paper aims to report a QA system that can answer how‐type questions based on confirmed knowledge acquired from mails, posted to a mailing list. It aims to propose a method of detecting incorrect information in mails posted to a mailing list (ML) by using mails that ML participants submitted for correcting incorrect information in previous mails.

Design/methodology/approach

The paper discusses a problem of acquiring knowledge from natural language documents, then proposes a method to give these mails three kinds of confirmation labels, positive, negative, and other, depending on their credibility.

Findings

The paper shows a QA system based on the confirmed knowledge. It finds mail questions that are similar to the user's question and gives answers and their confirmation labels to the user. By using the confirmation labels, the user can easily choose the information that can solve his or her problem.

Originality/value

The study describes a method of detecting incorrect information in mails posted to a mailing list and acquiring confirmed knowledge from them.

Details

Internet Research, vol. 18 no. 2
Type: Research Article
ISSN: 1066-2243

Keywords

Article
Publication date: 6 February 2017

Shumei Chen and Dandan Li

The purpose of this paper is to predict the likely economic effects of a free trade area (FTA) on both China and the United Kingdom (hereafter the UK).

1531

Abstract

Purpose

The purpose of this paper is to predict the likely economic effects of a free trade area (FTA) on both China and the United Kingdom (hereafter the UK).

Design/methodology/approach

Following literature review and trade relationship briefing, this paper uses the Global Trade Analysis Project simulation to predict the economic effects of such a FTA on both China and the UK.

Findings

The simulation results indicate that a China-UK free trade area (hereafter CUFTA) will bring more benefits than harm to both China and the UK, and achieving zero tariff or reducing technological barriers to trade (TBT) is mutually beneficial for both China and the UK, with the growth in GDP, economic welfare as well as import and export. Combining zero tariff and the reduction of TBT in exceptional departments is the most favorable way to improve the macroeconomic effects without bringing damaging effects on the comparative disadvantage industries such as transport equipment, chemicals industries for China and textiles and apparel industry for the UK.

Originality/value

After the UK voted to leave the European Union, CUFTA is put on the agenda by both the governments, yet there are fewer studies on CUFTA, with this paper being one of the early trials. Besides, based on the simulation results, some policy suggestions will be put forward for future negotiations and industrial policies’ adjustment.

Details

Journal of Chinese Economic and Foreign Trade Studies, vol. 10 no. 1
Type: Research Article
ISSN: 1754-4408

Keywords

Article
Publication date: 26 August 2014

I.R. Ramos, S.B. Valdez, K.R. Zlatev, W.M Schorr, B.M. Carrillo, M.S. Stoytcheva, I.R. Garcia and M.M. Martinez

– The purpose of this investigation was to develop a digital instrument for the quantitative evaluation of pitting corrosion in metals.

Abstract

Purpose

The purpose of this investigation was to develop a digital instrument for the quantitative evaluation of pitting corrosion in metals.

Design/methodology/approach

This investigation comprised two central parts: research, testing and monitoring of the formation of pitting by conventional methods and applying American Society for Testing and Materials (ASTM) Standards, and the development of a virtual instrument based on the LabVIEW 2010 platform.

Findings

The methodology used was suitable for the analysis of pitting on carbon steel and aluminum alloy UNS A96061, used in the aerospace industry.

Practical implications

This technique allows pits to be to localized, measured and quantified on metallic surfaces, for corrosion evaluation in atmospheric and industrial environments.

Originality/value

This combination of conventional and digital methods can assist in corrosion control of pitting in industrial equipment.

Details

Anti-Corrosion Methods and Materials, vol. 61 no. 5
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 8 August 2022

Xinxiang Li, Wen Zhan, Xuzheng Qian, Yunhe Zu, Fan Xie, Feng Tian, Xiaohui Liu and Yunhu Ding

This paper aims to focus the synchronous chemical conversion technology–based titanium/zirconium composite on 6061, 7075 aluminum alloys and galvanized steel.

Abstract

Purpose

This paper aims to focus the synchronous chemical conversion technology–based titanium/zirconium composite on 6061, 7075 aluminum alloys and galvanized steel.

Design/methodology/approach

The effects of pH, temperature, reaction time and other process parameters on the corrosion resistance of the three metal surface coatings were investigated by copper sulfate drop and electrochemical corrosion performance tests under a certain content of H2TiF6 and H2ZrF6. The surface morphology and element distribution of the conversion coating were analyzed by scanning electron microscope and X-ray photoelectron spectroscopy.

Findings

The results show that the optimal synchronization chemical conversion conditions of 6061/7075 aluminum alloys/galvanized steel are controlled as follows: H2TiF6 2.2 mL/L, H2ZrF6 1 mL/L, pH 3.9, conversion temperature 35°C and conversion time 120 s.

Originality/value

Multi-metals chemical conversion coating can be obtained simultaneously with uniform corrosion resistance and surface morphology. The presence of microdomain features in multiple metals facilitates simultaneous chemical conversion into coatings.

Details

Anti-Corrosion Methods and Materials, vol. 69 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

Article
Publication date: 3 May 2016

Sabien Dobbelaere, Rodolfo Lauterbach and Jacques Mairesse

Institutions, social norms and the nature of industrial relations vary greatly between Latin American and Western European countries. Such institutional and organizational…

Abstract

Purpose

Institutions, social norms and the nature of industrial relations vary greatly between Latin American and Western European countries. Such institutional and organizational differences might shape firms’ operational environment in general and the type of competition in product and labor markets in particular. The purpose of this paper is to identify and quantify industry differences in product and labor market imperfections in Chile and France.

Design/methodology/approach

The authors rely on two extensions of Hall’s econometric framework for estimating price-cost margins by nesting three labor market settings (LMS) (perfect competition (PC) or right-to-manage bargaining, efficient bargaining (EB) and monopsony). Using an unbalanced panel of 1,737 firms over the period 1996-2003 in Chile and 14,270 firms over the period 1994-2001 in France, the authors first classify 20 comparable manufacturing industries in six distinct regimes that differ in the type of competition prevailing in product and labor markets. The authors then investigate industry differences in the estimated product and labor market imperfection parameters.

Findings

Consistent with differences in institutions and in the industrial relations system in the two countries, the authors find regime differences across the two countries and cross-country differences in the levels of product and labor market imperfection parameters within regimes.

Originality/value

This study is the first to compare the type and the degree of industry-level product and labor market imperfections inferred from consistent estimation of firm-level production functions in a Latin American and a Western European country. Using firm-level output price indices, the microeconomic production function estimates for Chile are not subject to the omitted output price bias, as is often a major drawback in microeconometric studies of firm behavior.

Details

International Journal of Manpower, vol. 37 no. 2
Type: Research Article
ISSN: 0143-7720

Keywords

Article
Publication date: 7 November 2016

Xiping Liu, Ya Li, Zhangqi Liu, Tao Ling and Zhenhua Luo

The purpose of this paper is to propose a permanent magnet-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rare-earth PM…

Abstract

Purpose

The purpose of this paper is to propose a permanent magnet-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rare-earth PM synchronous motors used in Toyota Prius 2010.

Design/methodology/approach

A novel rotor structure with rectangular PMs is discussed with respect to the demagnetization of ferrite magnets and mechanical strength. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2D finite element analysis.

Findings

The results of the analysis show that a high power density and high efficiency for PMASynRM can be achieved using ferrite magnets.

Originality/value

This paper proposes a novel rotor structure of PMASynRM with low-cost ferrite magnets that achieves high power density as permanent machines with rare-earth PMs.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 35 no. 6
Type: Research Article
ISSN: 0332-1649

Keywords

Article
Publication date: 19 February 2021

Song Zhang, Haoze Li and Chunlai Chen

The purpose of this paper is to estimate the impact of China's outward foreign direct investment (OFDI) conducted by exporting firms on their productivity.

Abstract

Purpose

The purpose of this paper is to estimate the impact of China's outward foreign direct investment (OFDI) conducted by exporting firms on their productivity.

Design/methodology/approach

This study uses two Chinese firm-level datasets. To reduce the bias when merging the two datasets, this study uses a comprehensive link approach to obtain more observations. The propensity score matching method is employed together with the difference-in-difference and difference-in-difference-in-difference approaches to identify the casual effects.

Findings

The study finds that exporting firms become more productive through learning effect via OFDI, and the positive impact of OFDI on total factor productivity materializes very quickly but subject to diminishing return. The study also finds that state-owned enterprises gain less learning effect via OFDI than private-owned enterprises, and firms with higher export intensity or larger size tend to gain less improvement in productivity via OFDI.

Originality/value

This is one of the first studies to investigate empirically the impact of OFDI conducted by exporting firms on their productivity. In particular, the study analyzes three types of firm heterogeneous factors, namely, ownership, export intensity and size, in affecting exporting firms' learning effect via OFDI.

Details

International Journal of Emerging Markets, vol. 17 no. 9
Type: Research Article
ISSN: 1746-8809

Keywords

Article
Publication date: 26 June 2019

Ting-gui Chen, Gan Lin and Mitsuyasu Yabe

The purpose of this paper is to study the impact of outward foreign direct investment (OFDI) on the productivity of parent firms over the food industry.

Abstract

Purpose

The purpose of this paper is to study the impact of outward foreign direct investment (OFDI) on the productivity of parent firms over the food industry.

Design/methodology/approach

The main data in this paper are derived from the China Industrial Enterprise Database 2005–2013 and a data set of Chinese firms’ OFDI information. Then this paper uses propensity score matching to match the treatment and control groups with firm characteristics and combines that with the differences-in-differences method to estimate the real effect of OFDI on total factor productivity.

Findings

The food firm’s OFDI significantly improves the parent firm’s productivity (known as the OFDI own-firm effect), but this promotion only exists in the short term. The OFDI own-firm effect of food firms differs remarkably as the sub-sectors, regions and ownership of firms vary. The food firm’s OFDI in “non-tax havens” and high-income destinations has a significantly stronger effect on the parent firm’s productivity. FDI, R&D and exporting can effectively strengthen the OFDI own-firm effect of food firms.

Originality/value

The effect of OFDI on food industry productivity has not been researched yet. This paper aims to fill this gap. This paper further divides the characteristics of food firms into different sub-sectors, regions and ownership types for a comparative analysis, with the aim of conducting a more comprehensive study at the micro-level of firms. In addition, an investigation into which factors influence the degree of the OFDI own-firm effect at the micro-level has not been found in the literature. This paper will draw its own conclusions.

Details

China Agricultural Economic Review, vol. 11 no. 4
Type: Research Article
ISSN: 1756-137X

Keywords

Article
Publication date: 5 June 2017

Chang-Soo Lee and Inkyo Cheong

The purpose of this paper is to calculate regional contents in the exports of the major regional blocs to the world, Trans-Pacific Strategic Economic Partnership (TPP), and…

Abstract

Purpose

The purpose of this paper is to calculate regional contents in the exports of the major regional blocs to the world, Trans-Pacific Strategic Economic Partnership (TPP), and Regional Comprehensive Economic Partnership (RCEP), respectively, to find the backward trade linkages between them instead of normal forward linkages.

Design/methodology/approach

To calculate “a region” content in intermediate and value-added exports, this paper uses OECD’s inter-country input-output table (ICIOT), and tries to decompose the contents of trade. Using the information of ICIOT, Koopman et al. (2014) and Wang et al. (2013) decompose gross exports of a country’s exports.

Findings

TPP is a loosely tied bloc featured by openness to the Asia-Pacific region. Trade linkages between members are stronger in RCEP than those in TPP, particularly in the trade of intermediate goods. Trades in RCEP are closely connected to exports to TPP, but the opposite direction is not clear.

Research limitations/implications

First of all, the recent base year of the data on value added in trade is 2011, which can be regarded as a little bit out of date. Therefore, it should be cautious in interpreting the results in that it may not reflect the characteristics of current trade. Second, this paper uses ICOIT instead of world input-output table.

Practical implications

A large portion of trades in RCEP and TPP is triggered by a global production network (fragmentation, vertical specialization), different from traditional trade focusing on inter-industry trade or competition between countries. Thus, the formation of TPP or RCEP is predicted to stimulate trade of the other instead of discriminating nonmember countries.

Social implications

In particular, the authors have special concern in the backward linkages between RCEP and TPP, the distinct characteristics of the two regional blocs and, finally, major countries’ preferences of the one over the other and industrial conflicts toward TPP or RCEP even in an economy.

Originality/value

Although this paper uses the approach by Baldwin and Lopez-Gonzalez, this paper is the first research on the analysis of the export contents in major trading blocs in the Asia-Pacific region.

Details

Journal of Korea Trade, vol. 21 no. 2
Type: Research Article
ISSN: 1229-828X

Keywords

1 – 10 of 58