Modeling Airport Catchment Areas: Using Spatial Analysis Approach

Th e airport catchment area is the geographic area from which an airport can reasonably expect to draw commercial air service passengers. Th e purpose of this interdisciplinary research is to estimate airport catchment areas using a spatial analysis method for informed airport management. In order to ensure the comprehensiveness and reliability of the research, we chose to analyze the catchment areas for five airports of different sizes and in different geographic locations in the United States. The Huff model, which is usually used in marketing, economics, and retail research, was adopted in this study. We applied this model in airport catchment analysis for the selected airports, with consideration of ground transportation distance and airport attractiveness. We identified the best distance factors and parameters for modeling purposes. Th e results provided reliable information for the selected five airports to estimate their catchment areas. In addition, the model can provide a good reference for other airport catchment analysis studies about the effectiveness of the Huff model in prediction

Achieving holistic sustainability in Chinese and New Zealand business partnerships : an integrative approach : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Management at Massey University, Albany, Auckland, New Zealand

Tensions in sustainability are a relatively new area and largely unexplored empirically between firms in collaborative business partnerships, particularly drawing from paradox theory and organisational ambidexterity theory. If these tensions cannot be understood and addressed adequately, it will not only have negative impacts on individuals’ interests, but also on the development of organisations and ultimately the prosperity of the society. Hence, this study examines empirically how tensions in addressing divergent sustainability issues arise, and are perceived and managed between Chinese and New Zealand firms in business partnerships. Guided by an interpretivist philosophy, this research adopts a qualitative and abductive approach as the preferred research method. In doing so, 33 in-depth individual interviews alongside one informal group discussion were carried out at 16 relatively large Chinese and NZ firms known for their commitment to sustainability that are in business partnerships. This thesis includes three empirical chapters. The first findings chapter identifies tensions in sustainability between Chinese and New Zealand firms and discovers the reasons for them. The findings reveal that the Chinese and New Zealand firms in business partnership are faced with complex and multiple sustainability tensions which are thus more difficult and challenging for them to address simultaneously. This chapter also shows that the tensions are caused by an integration of multiple reasons from individual, organisational and national levels. The second findings chapter explores how managers make sense of these tensions. The results delineate four kinds of managerial logic – paradoxical, contradictory, business and defensive – which are applied to make sense of different kinds of tensions. In contrast to prior studies, the findings reveal that paradoxical logic is the most common logic adopted by the managers at Chinese and NZ companies in business partnerships; as the other types – contradictory, business and defensive logic – are not commonly used. The third findings chapter investigates the strategies that Chinese and NZ firms adopted to manage the tensions in their business partnerships. The findings show two main approaches: trade-off and integrative. This research highlights that working through sustainability tensions using integrative approaches can bring proactive outcomes which will help these companies to advance their sustainability practice through inter-organisational learning, to enhance their mutual understanding and to strengthen their business partnerships over time, thus achieving holistic sustainability. This research contributes to scholarly understanding of tensions in sustainability between firms in collaborative business partnerships in relation to the nature of the tensions, reasons for the tensions, managerial sensemaking of tensions and the strategies for managing the tensions. This also adds value to paradox theory and organisational ambidexterity theory including structural and contextual ambidexterity, and their theoretical and practical implications for tensions in sustainability research

An Optimization Model for Ordering and Transporting Raw Materials by Manufacturers Based on Linear Programming

This study applies analytic hierarchy process (A­­­HP), 0-1 integer programming and other systematic programming models, combined with the needs of manufacturers to build a set of mathematical models to help manufacturers select suppliers, control raw material ordering costs, and transporting costs. As the production costs of products is linked to the ordering and transporting of raw materials, manufacturers need to choose suitable raw material suppliers and develop the most economical ordering and transporting schemes with the most negligible loss so as to improve profits and enhance the market competitiveness. Taking a building and decorative plate enterprise as a case, this model shows that AHP can effectively quantify the supplying characteristics of suppliers and obtain a list of high-quality suppliers. LINGO software combined with linear programming can be used to obtain the optimal weekly ordering and transporting schemes, thus reducing the raw material ordering costs and transporting losses. It is shown from the results that the production costs of enterprises from the source can be reduced so as to improve their cost control system. The present study seeks to fill the gap in ordering and transporting raw materials for manufacturers to control production costs. At the same time, this model provides references for producers who have the demand for processing raw materials and play a significant role in controlling production costs

Finite Element Analysis of Perforated Casing High Stress Area Compressed Volume Coefficient

In view of the problem that perforation completion result in casing damage, from the perspective of perforating casing overall stress, on the basis of plate and shell opening mechanics model, establishing the cloth of spiral casing perforation holes finite element mechanics model, reflecting the area around the hole stress change after the casing perforation clearly. Comparing different perforation parameters before and after perforating casing under the condition of high stress area volume ratio, concluding the high stress area compressed volume coefficient, Analysis of the differential pressure under the condition of normal production, the influence of different perforation parameters (bore diameter, shooting density, phase angle) to the perforated casing compressed volume coefficient. The results of the analysis shows that different perforation parameters on the perforated casing all affect the compressed volume coefficient. According to the characteristics of the different effect law to different parameters, providing the optimization scheme of perforating parameters that reducing the volume coefficient of perforated casing high stress area. On the whole to reduce perforated casing high stress area compressed volume under normal production conditions.Key words: Perforation; Casing failure; Finite element method; High stress area; Compressed volume coefficien

Exploratory Research: The Effects of Electronic Books on College Students

In recent years, the e-book has become more and more popular among college students, and it is much easier to be installed and set up in electronic equipment, such as laptop, Kindle, or IPad. A random sample (N=80) of undergraduate (n=25) and graduate (n=55) students not only use the e-book to read in class and library, but also at public places and at home. Of the respondents, 46% have a part-time job, 32% have a full-time job, and 22% are not employed. Fifty-five percent of the sample was male and 45% were female. The results of the survey questionnaire indicate that 55% sample claimed to spend hours on learning every week by using electronic tools, especially reading articles. Twenty-eight percent of the participants would take their electronic equipment to class instead of traditional textbooks; and 17% of them own at least two pieces of electronic equipment. Although most students rely on traditional paper print books, the population of college students applying e-book in their study life is increasing rapidly because many more “smart” and inexpensive electronic equipment (hardware) are displayed in markets in which an e-book can be installed. As everyone knows, textbooks in the United States are very expensive to be afforded by all college students. Consequently, the e-book offers a far less expensive alternative than paper print books

Different types of screen-based sedentary time and anxiety in adolescents:Video games may be more important

AIM: Evidence demonstrates the negative impact of excessive screen-based sedentary time (screen-based sedentary behavior; SSB) on mental health in adolescents. However, little is known regarding the associations between different types of SSBs and anxiety symptoms in adolescents. Thus, this study sought to explore the associations between different types of SSBs and anxiety symptoms in a sample of Chinese adolescents. METHODS: A web-based questionnaire survey was used to collect data. In total, 1,998 study participants conveniently recruited in Guangdong Province completed the questionnaire. Of them, 1,331 study participants provided valid data for variables of interest. SSB was categorized into television/movie time, video game time, and internet-surfing time. Anxiety symptoms were assessed using Zung Self-Rating Anxiety Scale, a validated assessment in Chinese youth populations. Generalized linear models were used to explore the associations between different types of SSBs and anxiety symptoms. RESULTS: In adolescents, video game time of 6 or more h was positively and significantly associated with anxiety symptoms (odds ratio = 5.25, 95% CI: 1.86–14.84, p < 0.01). This association was also observed specifically in boys (odds ratio = 5.12, 95% CI: 1.56–17.44, p < 0.05); however, in girls, there were no associations between different types of SSBs and anxiety symptoms. CONCLUSION: Interventions aiming at reducing video games in adolescents, especially in boys, should be designed to prevent anxiety symptoms. This kind of intervention should also take sex differences into consideration. Future studies are encouraged to confirm the veracity of the findings in this study

Job Satisfaction Among Methadone Maintenance Treatment Clinic Service Providers in Jiangsu, China: A Cross-sectional Survey.

ObjectiveService providers' job satisfaction is critical to the stability of the work force and thereby the effectiveness of methadone maintenance treatment (MMT) programs. This study aimed to explore MMT clinic service providers' job satisfaction and associated factors in Jiangsu, China.MethodsThis secondary study used baseline data of a randomized interventional trial implemented in Jiangsu, China. A survey was conducted among 76 MMT service providers using the computer-assisted self-interview (CASI) method. Job satisfaction responses were assessed via a 30-item scale, with a higher score indicating a higher level of job satisfaction. Perceived institutional support and perceived stigma due to working with drug users were measured using a 9-item scale. Correlation and multiple linear regression analyses were performed to identify factors associated with job satisfaction.ResultsCorrelation analyses found a significant association between job satisfaction and having professional experience in the prevention and control of HIV, other sexually transmitted infections, or other infectious diseases (P = 0.046). Multiple regression analyses revealed that working at MMT clinics affiliated with Center for Disease Control and Prevention sites was associated with a lower level of job satisfaction (P = 0.014), and perception of greater institutional support (P = 0.001) was associated with a higher level of job satisfaction.ConclusionJob satisfaction among MMT clinic service providers was moderate in our study. Our findings suggest that institutional support for providers should be improved, and that acquisition of additional expertise should be encouraged

UNDERSTANDING INVESTMENT INTENTION TOWARDS P2P LENDING: AN EMPIRICAL STUDY

P2P lending is an innovation of micro-financial operation pattern, which is mainly used to meet the petty loan and investment demands of small and micro businesses and individuals. Given the rapid development of P2P market, there is a pressing need to understand lenders’ initial investment intentions in P2P platform. Although there are some studies exploring the factors explaining P2P lenders’ investment intentions, none of research has been reported from the perspective of the platform. This study extended technology acceptance model with perceived risk and initial trust as a theoretical framework to examine the roles of individual factors and platform factors in determining P2P lenders’ initial investment intentions. This study suggests that risk appetite, trust propensity, perceived ease of use, perceived security assurance, perceived privacy protection, perceived reputation, third-party certification, perceived risk and initial trust together provide a strong explanation for initial investment intention in P2P lending. The finding of this research provided a theoretical foundation for future academic studies as well as practical guidance for rapid development of P2P platform