Search results

Materials supply is one of the important elements in construction operation and a major factor affecting the quality of construction projects. Many industries look to manage materials effectively by attempting to integrate logistics processes into logistics chains of suppliers and customers. Logistics processes, being crucial for successful completion of construction projects, but in fact, auxiliary, are often entrusted to external professionals specialised in logistic services, such as logistics centres. However, this tendency is yet to be developed in construction. The purpose of this paper is to develop a simulation framework for the examination of potential improvements of logistics performance using logistics centres.

A case study approach was adopted with computer simulation using Flexsim. Data of vehicle movements were collected during construction on-site from the start of construction to “hand-over” to the building owner.

The ideal location of a logistics centre is identified using vehicle movements data collected on the site. The potential improvements of the planned centre are then evaluated by simulating various scenarios of vehicle movements. The enclosed results from the simulations indicate that using a logistics centre will reduce waste for the construction project considered.

The paper emphasises that creating a logistics centre for a project can improve construction logistics performance, by consolidating and optimizing both off-site and on-site logistics, especially when the site condition is prohibitive (small footprint with limited loading bay area). Establishing logistics centres may help find ways of making the overall construction project more effective by improving the management of materials.

This study explores whether institutional investors can distinguish an undervalued share repurchase from a falsely signaled share repurchase. This study also aims to determine what information institutions use when investing in repurchase stocks.

This study uses unique Taiwanese data and concentrates on foreign institutions because they are the most sophisticated investors in Taiwan.

The results show that foreign institutional trading in open market repurchase (OMR) stocks will earn both positive concurrent and post-OMR excess returns. In addition, there is a significant positive relationship between pre-OMR insider trading and foreign institutional trading during the OMR period; that is, foreign institutions follow insiders to trade their OMR stocks.

This study finds that foreign institutions use publicly available data on insider trading to choose OMR stocks and create excess returns. This encourages individual investors without private information, who can also earn a positive return if they diligently study available public information.

This study contributes to the international investment literature by determining the price impacts associated with foreigner trading in the firm-level returns of the host country. In addition, this study finds that foreign institutions choose OMRs based on insider trading information, which fills the gap in existing studies on share repurchasing. Moreover, this study enriches the insider literature by showing how foreign institutions can benefit by using insider trading information.

Cold-formed steel has been used extensively as secondary elements such as purlins and girts in building frames. Purlin is critical to the structure of the roof because it supports the weight of the roof deck and aids to make the entire roof structure more rigid. Furthermore, cold-formed steel purlin is a replacement for wood purlin because steel purlins are light weight and more economical. Hence, the purpose of this study to investigate the effect of opening due to torsion behaviour.

This analysis used cold-formed steel hat purlin with and without openings (WOs) under different opening shape, location and spacing by using finite element LUSAS software.

The finite element results showed that purlin with openings had higher angle of rotation than section WO, with a percentage difference of not more than 6%. When the opening was located at mid-span, the angle of rotation reduced. Angle of rotation increased when the opening spacing increased. Number of openings also affected the torsional behaviour of the purlin. Five opening shapes, which were circle, diamond, C-hexagon, square and elongated circle, were studied. Among all the shapes, purlin with diamond opening was more resistance to torsion.

The use of cold-formed steel section with web openings (rectangular or circular) is a practical solution when it is required to pass service ducts through the structural member. However, the presence of opening gives minor effect on the structural behaviour of cold-formed steel hat purlin.

A kind of novel heterocyclic bisquaternary ammonium salt (MBQA) was successfully synthesised with metronidazole as matrix and dichloroethyl ether as the link agent. Weight loss measurement, potentiodynamic polarisation curves, electrochemical impedance spectroscopy and atomic force microscopy were used to evaluate the corrosion inhibiting performance of MBQA in simulated oilfield water. Experimental data revealed that MBQA acted as an inhibitor in the acidic environment and, furthermore, the compound was a mixed‐type inhibitor. It was found that inhibition efficiency increased with an increase in MBQA concentration at different temperatures. The process of inhibition was attributed to the formation of an adsorbed film on the metal surface, which protected the metal against corrosive agents.

In complex adaptive system (CAS), the complex behavior of system is emerged from the bottom, that agents’ adaptability bottom‐up the complexity of the entire system. This idea can be simulated by the method of computer aid simulation. SWARM, which is developed by Santa Fe Institute, is such a tools kit based on the bottom‐up modeling method that can be used in CAS simulation on computer. This paper presented a Swarm based simulation platform for the study on complexity in flood disaster. Its application is illustrated with a SWARM based model and program for simulating spatial and temporal emergence of flooding. This model offers virtually unlimited possibilities to simulate the emergence of flooding. Some rules have been elicited from the experimental results, which could provide useful information for the disaster reduction and management.

The purpose of this paper is to investigate how consumers respond to price changes by analyzing online product reviews (OPRs) posted on a product (Amazon’s Kindle 2), and to suggest several future research topics on online consumers’ reactions embedded in OPRs.

An exploratory case study is conducted using OPRs added to the Kindle 2. By analyzing 6,714 OPRs, the authors examine how online consumers respond to two continual price decreases embedded in the observable (star rating and review depth) and implicit (positive and negative emotions) features of OPRs as well as how the number of OPRs per day has changed after two price drops.

The authors found that all four features of OPRs (star rating, review depth, positive emotion, and negative emotion) and the number of OPRs per day had significantly changed after two price decreases for both long-term and short-term periods. In addition, online consumers’ reactions to price decreases in terms of these four features and the change in the number of OPRs per day were different between the first and the second price drops.

This study investigates online consumers’ reactions to price decreases only. Future research should investigate other cases where price changes under the dynamic pricing strategy in order to find the relationship between price increases/decreases and consumers’ reactions.

This study implies that online merchants should consider consumer groups’ innovation adoption stages and make strategic decisions for price decreases to improve the sales of their products.

While prior research involving the effects of price changes on consumers’ reactions has focussed on offline consumers, this is among the first attempts to address the long- and short-term reactions to price changes in terms of both the observable and implicit features of OPRs, and suggests that consumers’ reactions to price changes in OPRs are more complex.

The purpose of this paper is to present a novel optimization approach to design a robust H-infinity controller.

To use a modified particle swarm optimization (PSO) algorithm and to search for the optimal parameters of the weighting functions under the circumstance of the given structures of three weighting matrices in the H-infinity mixed sensitivity design.

This constrained multi-objective optimization is a non-convex, non-smooth problem which is solved by a modified PSO algorithm. An adaptive mutation-based PSO (AMBPSO) algorithm is proposed to improve the search accuracy and convergence of the standard PSO algorithm. In the AMBPSO algorithm, the inertia weights are modified as a function with the gradient descent and the velocities and positions of the particles.

The AMBPSO algorithm can efficiently solve such an optimization problem that a satisfactory robust H-infinity control performance can be obtained.

The purpose of this paper is to examine how policy instability is priced in interest rates. Policy instability refers to the likelihood that the current policy will be changed in the future in the absence of political power shifts.

Chinese government’s experimental policy-making approach provides an ideal set of frequent policy flip-flops which allows us to identify the effect of policy changes.

Conditional on the bureaucratic quality of policymaking, a good-quality policy reversal is related to reductions in interest rate term spread and volatility; a bad-quality policy reversal is related to increases in the spread and volatility. The bureaucratic quality is multi-dimensional and the moderating effect is stronger on interest rates when it is measured more precisely.

First, we can use the interest rate dynamics to infer the policy risk premium, which is a more objective market indicator of the bureaucratic quality of the policy change. Second, the study is among the first that documents the pricing of policy instability can be moderated by the bureaucratic quality. The results indicate that it is important for a government to be responsive and consistent in liberalizing the financial market. It will lead to reduced cost of capital and volatility for investors and firms in the economy. Third, given that the bureaucratic quality is multi-dimensional and produces stronger impact jointly, a country shall continue to improve on different aspects of the bureaucratic quality. Although the study is based on the empirical evidence from Chinese policy environment, the results can be broadly applied to any developing economies that intend to liberalize the market to spur economic growth.

Profiles, in the first of a series, more recently established Open Archives Initiative (OAI) data providers whose content is not only “harvestable” by OAI service providers, and which offer open access to institutional and discipline information resources in a wide variety of publication and media formats. Looks at the Digital Library of the Commons; E‐LIS: E‐prints in Library and Information Science; INFOMINE; and the Open Video Project.

The purpose of this paper is to develop a theoretical model describing psychological states and behavioral outcomes experienced and exhibited by older generation interpersonal helping behavior (IHB) recipients in Chinese organizations.

The paper draws upon relevant literature and develops a theoretical model.

The analysis suggests that the extent of IHB that older generation Chinese employees receive from younger generation employees will lead to loss of mianzi, which will then result in reduced perceived generational guanxi, increased intended social isolation, and reduced intention to share task-related knowledge with the younger generation employees. The paper also proposes that perceived generational guanxi and intended social isolation will mediate the relationship between loss of mianzi and intention to share task-related knowledge with younger generation employees.

Because mianzi is an important cultural feature in Chinese societies, this paper provides four implications. First, younger generation employees could preserve and/or enhance older generation employees’ mianzi using less powerful messages. Second, younger generation employees should initiate task behaviors involving seeking opinions and expertise from older generation employees before exhibiting IHB. Third, mangers could reduce the negative impact of generational differences by establishing generational mentoring relationships between younger and older generation employees. Finally, younger generation employees could preserve and/or enhance older generation employees’ mianzi by playing the role of an informal subordinate rather than a problem solver when exhibiting IHB.

This paper is the first study exploring consequences of IHB from the perceptive of older generation IHB recipients in the Chinese context.