bluuebunny/crossref_metadata_2025_split huggingface dataset:
Heterogeneity of State Medical Marijuana Laws and Adolescent Recent use of Alcohol and Marijuana: Analysis of 45 States, 1991–2011
Authors: Johnson Julie K. , Johnson Renee M. , Hodgkin Dominic , Jones Abenaa A. , Matteucci Ann Marie , Harris Sion K. 
Published: October 2017

Objective To assess associations between enactment of state medical marijuana laws (MMLs), MML restrictiveness, and past-30-day youth alcohol use overall, and in relation to marijuana use. Method This quasi-experimental difference-in-difference designed study used state-level Youth Risk Behavior Survey data of 9th–12th grade students in 45 states from 1991–2011 (N D 715,014). We conducted bivariate (unadjusted) and multivariable (adjusted for state, year, individual characteristics) logistic regression analyses to examine the effect of MML enactment (yes/no) and less restrictive vs. more restrictive MMLs on five varying measures of past 30-day alcohol use (i.e., any use or binge) and alcohol and marijuana use behaviors. Results In the final adjusted analyses, MML enactment was associated with lower odds of adolescent past 30-day (1) alcohol use (OR D 0.92, [0.87, 0.97], p < .01) and (2) use of both alcohol and marijuana (OR D 0.93, [0.87, 0.99], p < .05). States with less restrictive MMLs had lower odds of past 30-day (1) alcohol use (OR D 0.94, [0.92, 0.97], p < .001), (2) binge drinking (OR D 0.96, [0.93, 0.97], p < .05), (3) alcohol use without any marijuana use (OR D 0.96, [0.93, 0.99], p < .01), and (4) use of both alcohol and marijuana (OR D 0.96, [0.92, 0.99], p < .05). Conclusions This study found that enactment of any MML, and of less restrictive MMLs, was associated with lower odds of past 30-day adolescent alcohol use among adolescents. With continued change in state marijuana laws, it is important to monitor the effect of their enactment and implementation, as well as their specific provisions (e.g. dispensaries, home cultivation), which may differentially affect adolescent behaviors.
Climate Change as an Agricultural Economics Research Topic
Authors: McCarl Bruce A , Hertel Thomas W 
Published: October 2017

AbstractClimate change is not just a topic for the future—it is already producing real consequences. Economically, the issue has three principal dimensions: impacts, that is, how vulnerable are we; adaptation, that is, what can we do to reduce the impacts by altering operations; and mitigation, that is, what can we do to reduce the drivers causing climate change and thus the long‐term extent of climate change? All of these issues have economic dimensions, including appraising damages and the value of effects reducing actions, as well as the formulation of efficient policies. Thus, it is not surprising that this is both an active agricultural economic research area and one with many more research possibilities. We review the impacts, adaptation, and mitigation literature, identifying issues, summarizing main findings, commenting on methods, and pointing out research needs, with a special focus on what agricultural/applied economists have to offer.
Disciplinary diversity in marine sciences: the urgent case for an integration of research
Authors: Markus Till , Hillebrand Helmut , Hornidge Anna-Katharina , Krause Gesche , Schlüter Achim 
Published: October 2017

AbstractRecent events and trends in international relations are making it necessary for scientists to design their projects in ways that can integrate disciplinary perspectives and learn how to communicate their results in governance processes. Some examples of settings in which such skills would be needed are the debates about the political and legal relevance of the “Anthropocene” as a concept, the establishment and implementation of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), the recent International Court of Justice’s decision on what constitutes “scientific purpose” under the Whaling Convention, and the ongoing international efforts to regulate deep seabed mining activities. These events reveal an acceleration of growing environmental, distributional, and geostrategic conflicts over ocean resources which are changing the character of marine research. For some time now marine sciences have recognized the interdependence of social and ecological systems and the cumulative effects of multiple environmental pressures. In addition, we observe that the relationship between science and policy-making is rapidly changing in a process which we refer to here as the internationalization of knowledge, and that scientific research activities and results are progressively being internationally contested. Altogether these developments constitute extrinsic constraints that render transcending disciplinary boundaries a conditio sine qua non for future marine research. Better comprehension of these trends and their implications may help us to understand marine science’s functioning in the near future, particularly the relationship between disciplines involved.
Development differentially sculpts receptive fields across human visual cortex
Authors: Gomez Jesse , Natu Vaidehi , Jeska Brianna , Barnett Michael , Grill-Spector Kalanit 
Published: October 2017

ABSTRACTReceptive fields (RFs) processing information in restricted parts of the visual field are a key property of neurons in the visual system. However, how RFs develop in humans is unknown. Using fMRI and population receptive field (pRF) modeling in children and adults, we determined where and how pRFs develop across the ventral visual stream. We find that pRF properties in visual field maps, V1 through VO1, are adult-like by age 5. However, pRF properties in face- and word-selective regions develop into adulthood, increasing the foveal representation and the visual field coverage for faces in the right hemisphere and words in the left hemisphere. Eye-tracking indicates that pRF changes are related to changing fixation patterns on words and faces across development. These findings suggest a link between viewing behavior of faces and words and the differential development of pRFs across visual cortex, potentially due to competition on foveal coverage.
High-throughput fitness profiling of Zika virus E protein reveals different roles for N-linked glycosylation during infection of mammalian and mosquito cells
Authors: Gong Danyang , Zhang Tian-hao , Zhao Dawei , Du Yushen , Chapa Travis J. , Shi Yuan , Wang Laurie , Contreras Deisy , Zeng Gang , Shi Pei-yong , Wu Ting-Ting , Arumugaswami Vaithilingaraja , Sun Ren 
Published: October 2017

AbstractZika virus (ZIKV) infection causes Guillain-Barré syndrome and severe birth defects. ZIKV envelope (E) protein is the major viral protein involved in cell receptor binding and entry and therefore considered one of the major determinants in ZIKV pathogenesis. Here, we report a gene-wide mapping of functional residues of ZIKV E protein using a mutant library with changes covering every nucleotide position. By comparing the replication fitness of every viral mutant between mosquito and human cells, we identified that mutations affecting N-linked glycosylation at N154 position display the most divergence. Through characterizing individual mutants, we show that, while ablation of N-linked glycosylation selectively benefits ZIKV infection of mosquito cells by enhancing cell entry, it either had little impact on ZIKV infection on certain human cells or decreased infection through entry factor DC-SIGN. In conclusion, we define the roles of individual residues of ZIKV envelope protein, which contribute to ZIKV replication fitness in human and mosquito cells.HighlightsGene-wide mapping of functional residues of E protein in human and mosquito cells.Mutations affecting N-linked glycosylation display the most dramatic difference.N-linked glycosylation decreases ZIKV entry into mosquito cells.N-linked glycosylation is important for DC-SIGN mediated infection of human cells.
Corporate social responsibility and firm financial performance
Authors: Feng Mingming , Wang Xiaodan , Kreuze Jerry Glenn 
Published: October 2017

Purpose
Despite the intensive research on corporate social responsibility (CSR) and firm financial performance, little is known about how the linkage between CSR and firm financial performance is heterogeneous across industries and how the performance implications are differentiated among specific categories of CSR activities. The purpose of this paper is to explore how the association between a firm’s engagement in CSR and firm financial performance is heterogeneous across industries and CSR categories.

Design/methodology/approach
Using a sample of 17,083 firm-year observations representing 1,877 firms from the largest 3,000 US companies during years 1991 and 2011, the authors compare the association between CSR and firm financial performance across ten industry sectors defined by Global Industry Classification Standard and across the four CSR categories classified by Mandl and Dorr (2007).

Findings
The authors find that the association between the overall CSR activities and firm performance is heterogeneous across industries. CSR has significant positive implications for firms from most, but not all, industries. Comparing the performance implication of CSR practices targeting different stakeholder groups, the empirical results indicate that different types of CSR have different influences on financial performance of firms from different industry sectors.

Research limitations/implications
This study provides new angles for managers in maximizing firm performance through CSR activities and suggests an important and interesting direction for researchers who engage in CSR research. Due to its heterogeneous nature, the CSR-performance relationship needs to be examined more specifically – across industries and different CSR categories. Findings from studies incorporating both company industrial sector and CSR categories would provide more meaningful and practical implications for managers.

Practical implications
This study provides important managerial implications. First, to maximize firm performance through CSR activities, managers must interpret the linkage between CSR and firm financial performance from the perspective of a specific industrial sector and acknowledge the importance of CSR practices across different CSR categories. Second, the findings suggest that CSR practices aiming at different stakeholder groups generate different financial returns in different industries. Firms engage in CSR to satisfy different stakeholder groups. When budgets are tight, managers may give higher priority to the CSR practices that have stronger effects on firm financial performance.

Originality/value
This study advances our understanding of the CSR-financial performance relationship by exploring its heterogeneous nature across industry sectors and across specific categories. To obtain the biggest gain from CSR spending, managers must have a good understanding how a specific CSR category can contribute to the financial performance of their particular company in their particular industry.
Different perspectives of public project managers on project success
Authors: Koops Leonie , van Loenhout Ceciel , Bosch-Rekveldt Marian , Hertogh Marcel , Bakker Hans 
Published: October 2017

Purpose
The authors argue that public project managers do not consider the iron triangle (cost, quality and schedule) primary important in measuring the success of their projects. To investigate which success criteria are important to public project managers, the authors interviewed 26 Dutch project managers who are employed by the government and who are responsible for managing infrastructural projects. The paper aims to discuss these issues.

Design/methodology/approach
In this research the Q-methodology is applied. Q-methodology helps to find for correlations between subjects across a sample of variables. Q-factor analysis reduces the individual viewpoints down to a few factors. A factor can be seen as the mathematical representation of an “average” perspective shared by a group of people.

Findings
Findings are based on the individual rankings of 19 success criteria; the authors distinguished three common perspectives: the holistic and cooperative leader, the socially engaged, ambiguous manager and the executor of a top-down assignment. In none of the perspectives the iron triangle criteria formed the top three to measure project success.

Research limitations/implications
The research results may have a national character. The way project success is perceived by public project managers may be culture dependent. For this the authors expand the research to other countries in the near future.

Practical implications
This paper contributes to the understanding of the public project manager by their private collaboration partners, like consultants, engineers and contractors. This will help them to understand their client and contribute to better collaboration in projects.

Originality/value
This paper shows that the difference in work attitude and value frame in the public sector leads to a specific view on project success.
An appraisal of paradigm shifts required of competence of the Nigerian quantity surveyors
Authors: Dada Joshua Oluwasuji 
Published: October 2017

Purpose
The purpose of this paper is to investigate the competence of Nigerian quantity surveyors with a view to identify and assess required areas of interest.

Design/methodology/approach
A structured questionnaire was administered among relevant groups of respondent (quantity surveyors, architects, engineers, builders and clients) in Nigeria. The respondents were asked to give rating, on a five-point Likert scale, on the required competencies (variables) expected of Nigerian quantity surveyors. A mean item score statistical analysis was used to rank the variables and compare them within the different groups. The analysis was undertaken using the Statistical Packages for Social Science tool. In exploring the underlying relationship among the competence requirement, factor analysis statistical technique was used to categorize them into key components.

Findings
The results of the study identified required competencies and factorized them into three components. These are as follows: procurement and value management; commercial management; and communication and entrepreneurship.

Originality/value
The findings provide insight into the competencies needed to be incorporated and/or intensified in the training of quantity surveyors in Nigeria.
Project procurement systems for mechanical, electrical and piping projects in Saudi Arabia
Authors: Mosley Jr John C. , Bubshait Abdulaziz A. 
Published: October 2017

Purpose
The purpose of this paper is to investigate the empirical relationship between mechanical, electrical, and piping (MEP) project procurement systems and project performance in the context of the Saudi Arabian construction industry. The study plans to expand the understanding of the relationship of design-bid-build (DBB) and design-build (DB) performance with respect to change order rate, cost growth, and schedule growth.

Design/methodology/approach
The paper statistically analyzed 207 MEP projects. It investigates the relationship of project procurement systems and three project performance indicators. Hypotheses testing was used to assess the relationship.

Findings
The results show that projects using the DB procurement system are more likely to have less cost overrun and experience a lower change order rate compared to DBB for pricing and selection methods, yet neither procurement system had an advantage over the schedule duration based on the study’s sample.

Research limitations/implications
The lack of information identifying the cause of contract change orders limits the interpretation of the findings. Sample sizes in some of the test criteria were statistically small, thus limiting the reliability or confidence level of the analysis for those samples. Caution should be used when interpreting the results as representative of the Saudi Arabian construction industry as a whole; due to the owner’s project execution policies, procedures, and standards, the level of enforcement of those practices may differ from other owners.

Originality/value
The paper fulfills and identified the relationship between the project procurement system and MEP project performance in the context of the Saudi Arabian construction industry.
The adoption of 4D BIM in the UK construction industry: an innovation diffusion approach
Authors: Gledson Barry J. , Greenwood David 
Published: October 2017

Purpose
British construction industry KPI data collected over recent years shows a trend in projects exceeding their time schedules. In 2013, the UK Government set a target for projects timeframes to reduce by 50 per cent. Proposed interventions included more rapid project delivery processes, and consistent improvements to construction delivery predictions, deployed within the framework of 4D Building Information Modelling (BIM). The purpose of this paper is to use Rogers’ Innovation Diffusion theory as a basis to investigate how this adoption has taken place.

Design/methodology/approach
In total, 97 construction planning practitioners were surveyed to measure 4D BIM innovation take-up over time. Classic innovation diffusion research methods were adopted.

Findings
Results indicated an increasing rate of 4D BIM adoption and reveal a time lag between awareness and first use that is characteristic of this type of innovation.

Research limitations/implications
Use of a non-probability sampling strategy prevents the results being generalisable to the wider construction population. Future research directions and methods are suggested, including qualitative investigations into decision-making processes around 4D BIM, and case studies exploring the consequences of 4D BIM adoption.

Practical implications
Recommendations of how to facilitate the adoption of 4D BIM innovation are proposed, which identify the critical aspects of system compatibility and safe trialling of the innovation.

Originality/value
This paper reinforces 4D BIM as an innovation and records its actual UK industry adoption rate using an accepted diffusion research method. By focusing on UK industry-wide diffusion the work also stands apart from more typical research efforts that limit innovation diffusion exploration to individual organisations.
Using jigsaw method to enhance the learning of research and consultancy techniques for postgraduate students
Authors: Yu Ann Tit Wan 
Published: October 2017

Purpose
Students find courses in research methods delivered by lectures, both difficult and boring. The purpose of this paper is to provide empirical research on another teaching and learning method, jigsaw method, to three groups of postgraduate students over three academic years.

Design/methodology/approach
The fifth topic of the course, qualitative research methods, was selected for implementation of the jigsaw class. The students completed a feedback questionnaire after classes to express their opinions and comments on the new method. Descriptive statistics and content analysis were used to test these data.

Findings
The students believed that the jigsaw method is an innovative teaching and learning activity and were generally satisfied with the process and the execution. They stated that participation was a valuable experience which enabled them to share knowledge with other classmates and gain a better understanding of the subject. Further improvements were also proposed by the students.

Research limitations/implications
First, the analysis of the implementation of the jigsaw methods is based on student perceptions rather than objective measures of learning gains. Second, the classes for full-time postgraduate students are relatively small. Data were collected, therefore, over three academic years to provide enough valid responses for analysis.

Originality/value
The research may be regarded as pioneering in relation to jigsaw classes for teaching and learning research methods in postgraduate course. The findings provide confidence to architecture, engineering and construction (AEC) academics to incorporate jigsaw methods in their courses. The results of this study provide useful information for AEC lecturers assisting them to design their classes using jigsaw methods.
Critical factors impacting the performance of mega-projects
Authors: Caldas Carlos , Gupta Ashish 
Published: October 2017

Purpose
Mega-projects (MP) are important not only to the stakeholders involved in their development and construction, but also to the societies, economies, and environments impacted by them. Given the importance of MP and the prevailing trend toward poor performance, the purpose of this paper is to identify changes in project development and execution to increase the likelihood of success on MP.

Design/methodology/approach
The researchers performed an extensive literature review in the initial phase. Then, interviews with experienced mega-project professionals were conducted to gather information on factors contributing to success and failure on MP. A detailed survey was then carried out to quantify and assess the frequency and impact levels of these factors. Finally, case studies were performed to analyze the manifestations of these impact factors on MP and identify mitigation strategies.

Findings
After gathering data from more than 100 projects, the researchers identified and prioritized 34 factors that have high frequency and negative performance impacts on MP, categorizing them into five categories. These factors were then used to create a mega-project preparedness assessment process and a lessons learned repository around these factors, which includes factor descriptions, examples from actual projects, and recommendations. The result is a structured method for enabling comprehensive mega-project risk management and mitigation planning.

Originality/value
The research has gone beyond any previous generic lessons learned, to enable project teams to make structured assessments of critical mega-project impact factors. Assessing these impact factors will enable more accurate and thorough mitigation planning for them and, thus, improve mega-project performance.