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Rework is a pervasive problem in the construction industry. While several studies have examined the relationship between rework and cost overruns, few have related rework to schedule performance impacts. As a result, the purpose of this paper is to assess rework in the construction industry and its impact on schedule performance. Additionally a discussion of the most probable causes for rework that affect schedule outcomes is presented, with some recommended solutions.

To achieve the objectives of the study, a questionnaire was developed and the responses from 32 companies in Singapore were analyzed. Furthermore, face-to-face interviews with six industry experts were conducted to get an in-depth understanding of the survey results.

The findings of this study revealed that rework is a leading factor affecting schedule performance and its occurrence is relatively high in the construction industry, with a significant contribution to construction schedule growth. It also identified certain root causes, namely design-related changes, poor design coordination and poor site management as factors that most negatively affect schedule performance.

It is anticipated that once companies recognize the causes for rework and their impacts on schedule, they will develop strategies to manage and prevent rework, ultimately allowing the industry to improve on project delivery schedule performance.

The purpose of this paper is to find the relationship of palaeontology, palaeobotany and coal thickness of Taiyuan Formation during Late Carboniferous – Early Permian Period in Shanxi Province.

This paper selects three regions, namely, Baode, Xishan and Lingchuan, to analyse the distribution characteristics of palaeontology, palaeobotany and variation of coal thickness.

It was found that in a certain period of geological history, palaeontology and palaeobotany play a dominant role in shaping of a coal-bearing basin. Coal seam thickness changes largely from the northwest to the southeast, gradually thinning in Taiyuan Formation.

Palaeontology and palaeobotany play a dominant role in the shaping of a coal-bearing basin.

The purpose of this paper is to provide the historical and social contexts for the three protests in Macau in the Summer of 2014, while examining the popular discourse of the protests. These include simultaneous eruptions toward immediate issues, the political apathy of Macau residents and Castell’s model of “networked social networks.” It also discusses the competition for youth after the protests.

This paper first reviews the history of Macau, in particular the people’s struggle against corruption and privilege, and its little-discussed history of protest. Its innovation in communications, political structure and education development are also explained to illustrate the foundations which make possible protests against an obsolete social structure.

The author finds that the history of Macau since the nineteenth century does not lack protests, with goals ranging from protests against colonialism to national and local demands. Macau youth are now more able and willing to mobilize themselves to make demands on the administration, and activists find it necessary to pass down such experience for generations to come.

The paper deconstructs the traditional image of Macau’s politics, by appealing to the linkage between continuity and contemporary events, and calls for the reader’s attention toward its social activism.

To fabricate high performance parts, this paper aims to systematically study the pores characteristics and their formation mechanisms in selective laser melting (SLM) AlSi10Mg.

Cubes of 10 × 10 × 5 mm were manufactured in different laser power, scan speed and scan space. Optical microscope (OM) and scanning electron microscopes (SEM) were used to observe morphology of pores.

Round or irregular pores were found in SLMed AlSi10Mg parts. All the round pores have smooth inner walls and locate in the melt pool. The formation mechanisms of the round pores are contributed to the evaporation of elements in the melt pool, H₂O, high laser energy input and hollow powder. Irregular pores have rough inner walls. Big scan space, unevenness of the upper surface, large layer thickness, spatter and oxide are the main reasons of generating irregular pores which outside the melt pool. Instability of keyhole leads to the irregular pores locate in the bottom of keyhole mode melt pool.

Relationship between pores and melt pool were studied systematically for the first time. Researches of pores characteristics and their formation mechanisms in SLMed AlSi10Mg would be a valuable reference for researchers to obtain an important insight into and control the defect in SLMed Al alloy.

For the laser powder bed fusion (L-PBF) technology, the side surface quality is essentially important for industrial applicated parts, such as the inner flow parts. Contour is generally adopted at the parts’ outline to enhance the side surface quality. However, the side surface roughness (Ra) is still larger than 10 microns even with contour in previous studies. The purpose of this paper is to study the influence of contour process parameters, laser power and scanning velocity on the side surface quality of the AlSi10Mg sample.

Using L-PBF technology to manufacture AlSi10Mg samples under different contour process parameters, use a laser confocal microscope to capture the surface information of the samples, and obtain the surface roughness Ra and the maximum surface height Rz of each sample after analysis and processing.

The results show that the side surface roughness decreases with the increase of the laser power at the fixed scanning velocity of 1,000 mm/s, the side surface roughness Ra stays within the error range as the contour velocity increases. It is found that the Ra increases with the scanning velocity increasing and the greater the laser power with the greater Ra increases when the laser power of contour process parameters is 300 W, 350 W and 400 W. The Rz maintain growth with the contour scanning velocity increasing at constant laser power. The continuous uniform contour covers the pores in the molten pool of the sample edge and thus increase the density of the sample. Two mechanisms named “Active adhesion” and “Passive adhesion” cause sticky powder.

Formation of a uniform and even contour track is key to obtain the good side surface quality. The side surface quality is determined by the uniformity and stability of the contour track when the layer thickness is fixed. These research results can provide helpful guidance to improve the surface quality of L-PBF manufactured parts.

Skippable video advertising offers users the option to skip directly to their desired video content after viewing a limited amount of advertising and is becoming a format increasingly preferred by advertisers. This study constructed a mediator model based on advertising attitude to examine the influence of users' perceived control and perceived intrusiveness on brand attitude and advertising avoidance intention in skippable video ads.

The study considered the structural equation model using a self-reporting measure method. The research model was tested using a sample of 302 respondents.

The results showed that perceived control positively affected ad and brand attitude and negatively affected advertising avoidance intention. Perceived intrusiveness negatively affected attitudes toward the advertising and the brand but positively affected advertising avoidance intention. Ad attitude and brand attitude had no significant influence on advertising avoidance intention. The results also confirmed that ad attitude mediates the path from perceived control and intrusiveness to brand attitude.

This study further enriches the theoretical development of skippable video ads and expands the perspective and scope of interactive advertising research.

As a key part of the algae removal equipment in the middle route of South-to-North Water Diversion Project, the static analysis and dynamic analysis are carried out for the structural characteristics of the frame. The paper aims to discuss this issue.

First, the model is constructed for analysis. Second, finite element analysis are carried out. And finally, test designed is used for the construction.

The optimization scheme that minimizes the quality under the condition of satisfying the allowable stress is found, and the quality is reduced by 6.88 percent.

The paper is based on the occurrence of seasonal algae in the main channel of the Middle Route of the South-to-North Water Diversion Project, an automatic algae-removing equipment was designed.

Does the history of the bureaucratic system, along with the establishment of the Great Wall during the Ming and Qing dynasties (1368–1911), affect firm behavior across the borderlands of the Great Wall?

The Ming and Qing dynasties built a centralized administrative system in the borderlands on the south side of the Great Wall, in contrast to the “feudal lordship” system on the north side. Employing a regression discontinuity analysis framework with the Great Wall as a geographical discontinuity, we examine the long-run effects of the Great Wall on firms’ earnings management.

Using a large sample of nonlisted firms in the central core frontier region, we show that the earnings management of firms in the region south of the Great Wall is significantly curtailed compared with firms in the north of it, and this effect is more pronounced for non-SOEs. Our findings are robust to a battery of tests to account for alternative explanations.

Overall, by emphasizing the role of institutions, like legal system, shaped in history on firms’ earnings management, this study sheds new light on institutional determinants of firms’ behaviors in earnings information disclosure.

First, we enrich our understanding of the institutional determinants of firms’ financial reporting outcomes. Second, our findings shed new light on the long-term effects of historical ruling styles on modern corporate behavior.

Typhoon Hato attacked Macau in August 2017 and had caused fatalities and extensive damages. This study aims to analyze the reactions of the city’s six casinos after the natural disaster from the perspective of corporate social responsibility (CSR), with particular emphasis on finding out which stakeholders had they directed their support mostly.

Qualitative content analyses of press releases, social media, company reports and websites of the casinos in relation to the disaster and their CSR activities were conducted and examined in depth. Furthermore, triangulation of the qualitative data was achieved with quantitative data through a regression analysis.

It was found that most of the casinos’ activities were delivered in the forms of donations, rebuilding the community, supporting staffs and calling for volunteer work, thus largely targeting on the community and employees.

The study serves as a practical lesson for the casino operators to better plan and implement risk and reputational management and to better proliferate their socially responsible side of the gaming business to the public. It also helps casinos to ponder upon better crisis management methods so as to attain sustainability of the industry itself.

The study explains the CSR activities of casinos, which are in a controversial industry, and attempts to explore why do they engage in CSR. It can be seen that the wrestle between social pressure and voluntarism will eventually institutionalize casinos and other controversial businesses in promoting more CSR in various aspects.

Combining some established institutional and socio-psychological theories, including the theory of planned behavior and the theory of regret regulation, the current work serves as an exploratory study to look into how and why Macau’s leading industry reacts in response to a natural disaster through CSR.

This paper aims to learn about consumers’ information disclosing patterns in the mobile internet context by investigating how demographic, geographic and psychological factors influence their information disclosing willingness (IDW).

Drawing on self-disclosure theory, the authors carried out simple linear regression analyses on a Chinese sample of 10,000 participants.

The results revealed that significant gender differences exist between males and females in their IDW in mobile internet context, and females have higher IDW than males do. And the authors also found that first-tier (third tier) citizens have the lowest (highest) IDW in their mobile internet usage.

This study offers three implications. First, this paper captures the insight of IDW within the mobile internet context, while previous studies mostly focus on the desktop internet context. Second, the results show that females have higher willingness to disclose than males do in the context of mobile internet, which is different from the findings of prior studies that females have higher privacy concerns and lower disclosing willingness in the context of desktop internet. Thirdly, this research introduces city tiers as a new approach to the study of IDW, which is one of the first studies exploring the geographical effect on information privacy.