Sungjoo Lee

Customer satisfaction factors of mobile commerce in Korea

Purpose – The purpose of the paper is to distinguish features of m‐commerce from those of e‐commerce and identify factors to influence customer satisfaction (m‐satisfaction) and loyalty (m‐loyalty) in m‐commerce by empirically‐based case study.Design/methodology/approach – First, based on previous literature, the paper builds sets of customer satisfaction factors for both e‐commerce and m‐commerce. Second, features of m‐commerce are identified by comparing it with current e‐commerce through decision tree (DT). Third, with the derived factors from DT, significant factors and relationships among the factors, m‐satisfaction and m‐loyalty are examined by m‐satisfaction model employing structural equation model.Findings – The paper finds that m‐commerce is partially similar in factors like “transaction process” and “customization” which lead customer satisfaction after connecting an m‐commerce site, but it has unique aspects of “content reliability”, “availability”, and “perceived price level of mobile Interne...

Using Patent Information for Designing New Product and Technology: Keyword Based Technology Roadmapping

With the rapid change in markets and technologies, it is becoming essential for firms to develop new products constantly. This can most successfully be achieved by using technology roadmaps (TRMs), which are effective tools for connecting product and technology planning. However, TRMs generally tend to overstate the qualitative and expert-dependent knowledge rather than incorporating quantitative and objective information. This paper proposes a new approach where patent data are used in a quantitative methodology to support reliable decision-making in roadmapping processes. In this study, text-mining techniques were utilized to extract the relevant information on which portfolio, co-word, and network analyses were carried out. The results were three types of product-technology maps that can be applied to specific roadmapping steps. The suggested approach is expected to yield useful information about roadmapping, and help improve the overall effectiveness and quality of the technique.

Development of an integrated product‐service roadmap with QFD

Purpose – The purpose of this paper is to provide a concrete integrated roadmap structure and a supporting tool for efficient roadmapping, to enhance interdisciplinary research on product‐service.Design/methodology/approach – The paper first clarifies definitions based on literature review. Next, the integrated roadmap structure is designed by overcoming limitations of the existing product‐service roadmaps. Lastly, a modified quality function deployment technique is developed to be used as a means for the integration process and applied to the mobile communications industry for the case study.Findings – The suggested roadmap and roadmapping process have potential advantages that can help strategic planning and management of product‐service.Research limitations/implications – There are issues related to complexity of the suggested technique and completeness of the case study.Practical implications – The suggested approach stimulates communication and knowledge sharing between manufacturers and service prov...

A prediction model for success of services in e-commerce using decision tree: E-customer's attitude towards online service

This research attempts to identify some characteristics of services which encourage customers to buy online and to develop a prediction model for success based on customer recognitions of service offerings in e-commerce. For the purpose, a survey was conducted on potential e-customers for their understandings of service offerings extracted from Portal Sites. Collected data were used to develop a prediction model using decision tree which showed superior prediction accuracy to conventional techniques. The results will help predict online success judging from customer acceptance and afford a better understanding of how to facilitate future adoption of services in e-commerce.

Beneficiation of coal pond ash by physical separation techniques

In this study, investigations to develop a beneficiation process for separating coal pond ash into various products were undertaken. To this end, coal pond ash samples with different particle size ranges were tested in terms of their washability characteristics in a float-and-sink analysis. It was found that coal pond ash was heterogeneous in nature consisting of particles that varied in terms of their size and composition. However, it can be made more homogenous using a gravity separation method. Therefore, the possibility of separating coal pond ash was tested on standard equipment typically used for gravity concentration. To increase the separation efficiency, coal ash was separated according to the size of the particles and each size fraction was tested using equipment appropriate for the corresponding sizes. A hindered-settling column and a shaking table were tested for their ability to treat the 1.19 × 0.074 mm size fraction, and a Falcon concentrator was evaluated for its ability to treat the -0.074 mm size fraction. The results showed that various marketable products, such as lightweight aggregate, sand and high-carbon fuel, can be recovered from coal pond ash using simple physical separation techniques.

Patent Analysis on the Structure and Patterns of Competition across Information and Communications Technologies: Lotka-Volterra Equation Approach

This research suggests a new approach to incorporating both the positive and negative effects of innovations when analysing interactions between information and communications technologies (ICTs). To this end, the U.S. Patent and Trademark Office (USPTO) database was used and Lotka-Volterra equations applied. This research is an exploratory one, investigating how the equations can be applied to patent data. In particular, the equations were used to analyse competition patterns between ICTs and among ICT-related industries, and also to divide ICTs into several technology groups based on their competition patterns. The research findings will help to understand the nature of the ICT sectors and are expected to have numerous implications for strategic planning in the ICT-related industries.

Web-based supporting system for Technology Roadmap: development, application and integration

Previous research on Technology Roadmap (TRM) has paid little attention to enhancing the efficiency of roadmapping processes. Out of various ways to improve the efficiency, one possibility is to promote the interaction between TRM and other management tools. And so the main purpose of this research is to link TRM successfully with other tools. For this purpose, a web-based supporting system is developed, as web-based characteristics facilitate knowledge formation and distribution across the overall enterprise planning systems. The proposed system will ensure easy creation, dissemination and upkeep of TRMs and also enables controlled, integrated and retrospective management of technologies.

Flotation process in coal bottom ash and their effect on the removal of unburned carbon

ABSTRACT In this study, the removal of unburned carbon (UC) from the coal bottom ash (CBA) by flotation was studied by explaining the relationship between adsorption characteristic with different solution pH and content of UC for increasing removal efficiency. Therefore some CBA samples were chosen for test and those samples contained 2.73%(sample A), 7.01%(sample B) and 10.49%(sample C) of UC respectively. The column flotation was carried out at the condition of 10 L/min flow rate with the reagents of 500g/ton kerosene and 80g/ton MIBC. The flotation method was employed using each samples ranged from 6.5 to 52g/L. From the adsorption kinetic curves, the rate of UC adsorption increased rapidly as the reaction approached to equilibrium. The isotherm characteristics on the UC adsorption of CBA were S-type, and these curves were fitted to the BET adsorption isotherm. Content of UC and pH influenced the adsorption; adsorption efficiency was high with increasing content of UC and decreased when pH sifted to acid or alkaline conditions.

Characterization of Coal Pond Ash for Reutilization

ABSTRACT In Korea, most of coal bottom ash produced by coal power plants is being disposed to the ash pond as slurry, and more than 80% of the coal power plant sites are occupied for the storage of the huge quantity of ash, which leads to environmental problems and managerial burden for plant operators. In this study, investigations were taken to develop a beneficiation process for separating the coal pond ash into valuable products for various applications. To determine the characteristics of the bottom ash stored in an ash pond, core samples were taken through the pond. These samples were then evaluated for the particle size distribution and the carbon content. The core samples with similar characteristics were fractionated into several size fractions. And they will be then subjected for float-sink separations to determine the cleanability. The results will be used for developing a multi-stage process to separate the coal pond ash in various products such as lightweight aggregate, sand, high-carbon fuel, and very fine inorganic fillers.

Optimum Design of RDF Processing System Using RFTF Method

ABSTRACT Recently, RDF (refuse derived fuel) has been gaining importance in the treatment of municipal solid waste in view of environmental aspects as well as energy recovery. In this study, a technical assessment of the RDF production process was carried out using the RFTF (recovery factor transform function) method. Various configurations of the RDF processing circuit were evaluated in terms of heat value, mass yield and costs. As a result, the optimum RDF processing line was identified. Currently, the environmental impacts of the process are being evaluated using LCA (Life Cycle Assessment).