Blasting in water-conveyance tunnels that cross rivers is vital for the safety and stability of embankments. In this work, a tunnel project that crosses the Yellow River in the north district of the first-phase Eastern Line of the South-to-North Water Diversion Project was selected as the research object. A complex modeling and numerical simulation on embankment stability with regard to the blasting power of the tunnel was conducted using the professional finite difference software FLAC3D to disclose the relationships between the (...) blasting seismic waves with vibration velocity and embankment displacement under different excavation steps. Calculation results demonstrated that displacement generally attenuated from the tunnel wall to the internal structure of rocks under the effect of blasting seismic waves. The tunnel wall was in tension, and tensile stress gradually transformed into compressive stress with increased depth into the rocks. The curtain-grouting zone was mainly concentrated in the compressive zones. For different excavation steps, the vibration velocity at different feature points was high at the beginning of blasting and then gradually decreased. The resultant displacement was relatively small in the early excavation period and slowly increased as blasting progressed. The effects of different excavation steps on the safety of surrounding rocks and embankment under blasting seismic waves were simulated. We found that the blasting-induced vibration velocity was within the safe range of the code and that the calculated displacement was within the allowed range. Numerical simulation was feasible to assess the safety and stability of engineering projects. (shrink)

Crude oil is one of the most important types of energy for the global economy, and hence it is very attractive to understand the movement of crude oil prices. However, the sequences of crude oil prices usually show some characteristics of nonstationarity and nonlinearity, making it very challenging for accurate forecasting crude oil prices. To cope with this issue, in this paper, we propose a novel approach that integrates complete ensemble empirical mode decomposition with adaptive noise and extreme gradient boosting, (...) so-called CEEMDAN-XGBOOST, for forecasting crude oil prices. Firstly, we use CEEMDAN to decompose the nonstationary and nonlinear sequences of crude oil prices into several intrinsic mode functions and one residue. Secondly, XGBOOST is used to predict each IMF and the residue individually. Finally, the corresponding prediction results of each IMF and the residue are aggregated as the final forecasting results. To demonstrate the performance of the proposed approach, we conduct extensive experiments on the West Texas Intermediate crude oil prices. The experimental results show that the proposed CEEMDAN-XGBOOST outperforms some state-of-the-art models in terms of several evaluation metrics. (shrink)

The recognition memory for inverted faces is especially difficult when compared with that for non-face stimuli. This face inversion effect has often been used as a marker of face-specific holistic processing. However, whether face processing without awareness is still specific remains unknown. The present study addressed this issue by examining the face inversion effect with the technique of binocular rivalry. Results showed that invisible upright faces could break suppression faster than invisible inverted faces. Nevertheless, no difference was found for invisible (...) upright houses and invisible inverted houses. This suggested that face processing without awareness is still specific. Some face-specific information can be processed by high-level brain areas even when that information is invisible. (shrink)

Numerous authors have attempted to carve an ontological distinction between events and processes on the basis of a widely noted linguistic datum involving count and mass nouns, where events are thought to be analogous to countable objects while processes to non-countable stuff. By assessing the most developed of these proposals—that of Helen Steward’s—this paper locates the motivations behind the project of carving some such distinction between events and processes, and proceeds to offer considerations toward an alternative account of processes—one whose (...) ontology is more akin to that of states than it is to stuff. (shrink)

The train-set circulation plan problem belongs to the rolling stock scheduling problem and is similar to the aircraft routing problem in airline operations and the vehicle routing problem in the logistics field. However, TCPP involves additional complexity due to the maintenance constraint of train-sets: train-sets must conduct maintenance tasks after running for a certain time and distance. The TCPP is nondeterministic polynomial hard. There is no available algorithm that can obtain the optimal global solution, and many factors such as the (...) utilization mode and the maintenance mode impact the solution of the TCPP. This paper proposes a train-set circulation optimization model to minimize the total connection time and maintenance costs and describes the design of an efficient multiple-population genetic algorithm to solve this model. A realistic high-speed railway case is selected to verify our model and algorithm, and, then, a comparison of different algorithms is carried out. Furthermore, a new maintenance mode is proposed, and related implementation requirements are discussed. (shrink)

This research investigates firms’ bribery motivations in China. Based on resource dependence theory and anomie theory, we identify resource conditions as firms’ proactive motivation to bribe and firms’ perceived institutional environment as their passive motivation to bribe. We use the data from 2002 World Business Environment Survey, collected by the World Bank, to investigate firms’ bribery in the world’s largest emerging market, China. We employ a multi-level logistic model to test our hypotheses. The results show that unsatisfactory general and task (...) environmental conditions may trigger firms to bribe in order to compete for better resources and opportunities; institutional conditions such as the security expenditure and anomie climate may make firms perceive bribery as a common phenomenon and thus induce firms to bribe. This research provides some insights to understand business bribery behaviors in emerging market. It also discusses some managerial implications and guidelines for policy-making from the findings. (shrink)

Motivated by advances in mass customization in business practice, explosion in the number of internet of things devices, and the lack of published research on privacy differentiation and customization, we propose a contextual information relevance model of privacy. We acknowledge the existence of individual differences with respect to unique security and privacy protection needs. We observe and argue that it is unfair and socially inefficient to treat privacy in a uniform manner whereby a large proportion of the population remain unsatisfied (...) by a common policy. Our research results provide quantifiable means to measure and evaluate the customized privacy. We show that with privacy differentiation, the social planner will observe increases in demand and overall social welfare. Our results also show that business practitioners could profit from privacy customization. (shrink)

Business students appear predisposed to select disciplines consistent with pre-existing worldviews. These disciplines then further reinforce the worldviews which may not always be adaptive. For example, high levels of Social Dominance Orientation is a trait often found in business school students :691–721, 1991). SDO is a competitive and hierarchical worldview and belief-system that ascribes people to higher or lower social rankings. While research suggests that high levels of SDO may be linked to lower levels of empathy, research has not established (...) the potential relationship between another related adaptive trait in the workplace, compassion. Compassion facilitates workplace performance by lowering levels of litigation, easing stress, and facilitating cooperation. Accordingly, the following study aimed to examine the relationship between SDO and compassion while hypothesizing Economic Systems Justification would mediate this relationship. Because of the importance of compassion in the workplace, the prevalence of SDO in the business academic community and the topicality of ESJ, we conducted our study with business school students. Results confirmed all but one hypothesis. (shrink)

Recent Neo-Davidsonian accounts of the semantics of progressive constructions of action verbs reflect an ontological distinction between processes or incomplete events on the one hand, and complete events on the other. This paper has two goals. First, it attempts to show that this putative ontological distinction is beset with problems. The second goal of this paper is to offer the beginnings of a positive proposal that seeks to show how the ontologically austere Davidsonian can account for the truth conditions of (...) progressive constructions without the need for an enriched ontology. (shrink)

Community is the core spatial unit for evaluating sustainable development. However, single data and method seem inadequate for conducting a scientific, effective, and innovative sustainable evaluation of complex community units. In this study, we perform a sustainable-oriented land use scheme using multisource remote sensing, machine learning, and object-based postclassification refinement. Furthermore, we assess the sustainability of the traffic community by data-driven and combined housing, ecosystem services, and landscape configuration. The results indicated that the relationship between housing, ecosystem services, and landscape (...) pattern has obvious synergistic effects, although with dissimilar importance in different sustainability levels. High sustainability level is intensely coordinated with landscape configuration, medium sustainability level is more affected by ecosystem services, and low sustainability level is more related to housing. Community sustainability presents a significant spatial distribution. The communities of high sustainability level are mainly located in both sides of the Pearl River and emerging urban areas, while those of medium sustainability level are distributed sporadically in the study area and those of low sustainability level are concentrated in old towns. Community transformation cannot be accomplished at one step. Along with the continuous optimization of landscape configuration, the priority should be given to housing reconstruction and improvement of ecosystem services further. We provide scientific and effective data-based evidence for urban decision-makers by integrating the advantages of the Earth Observation System and multifactor analysis. (shrink)

Since Oregon implemented its Death with Dignity Act, many additional states have followed suit demonstrating a growing understanding and acceptance of aid in dying processes. Traditionally, the patient has been the one to request and seek this option out. However, as Death with Dignity acts continue to expand, it will impact the role of physicians and bring up questions over whether physicians have the ethical obligation to facilitate a conversation about AID with patients during end of life discussions. Patients have (...) the right to make informed decisions about their health, which implies that physicians have an obligation to discuss with and inform patients of the options that will accomplish the patients’ goals of care. We will argue that physicians have an ethical obligation to inform certain patients about AID during end of life care discussions. We will also address what this obligation encompasses and explore guidelines of when and how these conversations should occur and proceed. Earlier guidelines, presented by various palliative care and ethics experts, for proceeding with such conversations have mostly agreed that the discussion of hospice and end of life care with patients should be initiated early and that the individual goals of a patient during the remaining duration of life should be thoroughly examined before discussion of appropriate options. In discussing AID, physicians should never recommend but inform patients about the basics so that they can make an informed decision. If patients express further interest in AID, the physician should open up the dialogue to address the reasoning behind this decision versus other possible treatments to ensure that patients clearly comprehend the process and implications of their decision. Ultimately, any end of life choice should be made by patients with the full capacity to express what they envision for the remaining duration of life and to comprehend the advantages and disadvantages of all the possible options. (shrink)

Objective: The objectives of this study are to understand the current functions, structure and operation of hospital ethics committees (HECs) in Shanghai and to facilitate their improvement. Methods: (1) A questionnaire survey, (2) interviews with secretaries and (3) on-site document reviews of HECs in Shanghai were used in the study, which surveyed 33 hospitals. Results: In Shanghai, 57.56% of the surveyed hospitals established HECs from 1998 to 2005. Most HECs used bioethical review of research involving human subjects as well as (...) bioethical review or consultation regarding medical care services and administrative decision- making. Of the surveyed HECs, 14.3% did not provide any formal bioethical training to the HECs’ members and many HECs had no standard operating procedures. Some HECs had no clear definition of what was “conflict of interest” that should be considered by the HECs, while 44.4% of the HECs did not perform continuing review. Discussion: After the issues of related national regulations, more and more hospitals established HECs in Shanghai, but the functions of HECs need to be further developed and formal training on bioethics should be provided to HEC members. To assure the independence and good performance of HECs, the conflict of interest procedure, the standard operating procedures and bioethical review should be improved. Conclusion: HECs in Shanghai had developed in the preceding 10 years and they played great roles in protecting the rights and welfare of human subjects and patients; some areas need improvement. (shrink)

This study aims to enrich our understanding of the relationship between political connections and the adoption of environmental corporate socially responsible investments. In addition to the individual-level political connections, i.e., entrepreneurs’ personal ties to government officials, we propose in China the creation of Communist Party of China branches in privately owned firms serve as organizational and institutionalized dimensions of political connection building. Drawing on the social exchange theory, this paper details how CPC branches function in privately owned firms and how (...) entrepreneurs are motivated by the reciprocal logic to engage in ECSR. We also supplement this main effect by examining the boundary conditions of it at the firm and regional level. Using a dataset with 17,690 firm observations in China, we find that the existence of CPC branches gives rise to the ECSR investments and the firm-level contingencies such as centralized governance and financial constraints, and the regional-level contingencies such as the development of the market system, are important moderators that shape the association of political links and ECSR investments. These findings have ample implications to understand the ECSR activities and extend social exchange theory beyond the individual level on which it is typically applied. (shrink)

With the increase in use of a technology, its misuse possibility also increases in general. Moreover, there are instances where new technologies are implemented without thoroughly testing for vulnerabilities. We consider RFID, a disruptive technology, and related vulnerabilities in existing supply chain applications from an ethics perspective. We develop an extended ethics model to incorporate the effects of emerging information and communication technologies, specifically that of RFID systems, including technology selection, social consequences, and practitioners’ rationality. We introduce a set of (...) matrices for technology regulation development based on this model to serve as a communication tool for the policy maker for policy design regulation. We use the case of RFID to illustrate the model and matrices. (shrink)