Scheduling multiple robots in a no-wait re-entrant robotic flowshop

No-wait re-entrant robotic flowshops are widely used in the electronic industry, such as PCB and semiconductor manufacturing. In such an industry, cyclic production policy is often used due to large lot size and simplicity of implementation. This paper addresses cyclic scheduling of a no-wait re-entrant robotic flowshop with multiple robots for material handling. We formulate the problem and propose a polynomial algorithm to find the minimum number of robots for all feasible cycle times. Consequently, the minimum cycle time for any given number of robots can be obtained with the proposed algorithm. The algorithm runs in O(N⁵) time in the worst case, where N is the number of machines in the robotic flowshop.     

Long-haul and short-haul outbound all-inclusive package tours

Most long-haul and short-haul outbound travelers in Hong Kong purchase all-inclusive package tours through travel agencies. Thus, it is important for travel agencies to understand the criteria used by travelers to select package tours. This study aims to identify these criteria, and to investigate the differences between these two groups of travelers. The sample size was 200. The results show that personal safety and the guarantee of a promised departure date were the most important selection criteria for the travelers. Prospective long-haul travelers were more concerned with product features and the quality of counseling, and were less sensitive to price than were short-haul travelers.     

Drivers of Customer–Brand Relationship Quality: A Case of Mainland Chinese Hotel Loyalty Program Members

Hotel chains should understand the effectiveness of the benefits offered by their programs and the influence of customer relationship management (CRM) initiatives of individual hotels because of the high operating costs of loyalty programs and the risk of creating an affinity to the rewards they offer rather than to the brand itself. This study determines the effect of the satisfaction of hotel loyalty program members on the benefits they receive, and the CRM efforts of individual hotels on the quality of their relationship with the brand. The sample was drawn from mainland Chinese customers because of the growing importance of the Chinese tourism market. Results reveal that program benefits have no significant effect on the quality of the relationship of the member with the hotel brand. The communication of the program to its members and the customer orientation of individual hotels are the key determinants of relationship quality.     

Environmental Regulation and Industry Location in Europe

This paper estimates the effect of environmental regulation on industry location and compares it with other determinants of location such as agricultural, education and R&D country characteristics. The analysis is based on a general empirical trade model that captures the interaction between country and industry characteristics in determining industry location. The Johnson–Neyman technique is used to fully explicate the nature of the conditional interactions. The model is applied to data on 16 manufacturing industries from 13 European countries. The empirical results indicate that the pollution haven effect is present and that the relative strength of such an effect is of about the same magnitude as other determinants of industry location. A significant negative effect on industry location is observed only at relatively high levels of industry pollution intensity.     

Segmenting Leisure Travelers by Risk Reduction Strategies

This study is an initial attempt in using risk reduction strategies as the basis for segmenting leisure travelers. Results of the study generated insights into the nature of consumer markets and created three segments of travelers who adopted risk reduction strategies in different ways. The three leisure travelers' segments include: socially reliant risk reducers, self-initiated risk reducers, and unconcerned about risk reduction. Travel behaviors and sociodemographics of the three segments were also compared.     

Risk attitude and wage growth: replicating Shaw (1996)

We replicate Shaw (J Labor Econ 14(4):626–653, 1996) who found that individual wage growth is higher for individuals with greater preference for risk taking. Expanding her dataset with more American observations and data for Germany, Spain, and Italy, we find evidence that risk attitudes are relevant but support is mixed at best for the original specifications.     

Secondary school tuck shop options and student choices: A cross‐sectional survey

Obesity in children is rapidly becoming a major public health problem in Hong Kong; the prevalence of overweight in children increased from 16.2% to 22.2% between 1998 and 2008. Healthy eating programs and policies exist, but only for primary schools, and students’ eating habits change when they are exposed to the new environment in secondary schools. Therefore, this study examined the relationship between available food in secondary school tuck shops and students’ purchasing preferences. A cross‐sectional survey was conducted from mid‐March to mid‐April 2016 across six secondary schools, using a questionnaire to measure students’ healthy eating knowledge and eating habits and a checklist to explore food options in each school's tuck shop. Linear regression was used to explore the relationship between eating knowledge and eating habits and logistic regression to explore the relationship between available foods at the tuck shops and the children's purchasing preferences. A total of 374 junior secondary students participated in the survey. A weak, positive correlation was found between healthy eating knowledge and healthy eating habits. No association was found between available food at tuck shops and children's purchasing preferences. The results reveal a definite knowledge‐attitude gap where healthy eating is concerned. Despite there being no significant association between the food offerings in tuck shops and students’ measured purchasing preferences (p > .05), 81% of the students stated that they would choose healthy food if offered, illustrating the urgent need to assess the variety and nutritional quality of foods available in secondary school tuck shops.     

Opportunity Cost Estimation of Ecosystem Services

Land-use changes rank among the most significant drivers of change in ecosystem services worldwide. The enhancement of important services such as biodiversity and carbon sequestration requires modifications in land-use that can lead to the decline in other ecosystems services. Targeting the most suitable areas for particular land-uses based on comparative advantages requires opportunity cost information across large regions. This is a demanding task because the input–output relations are ill-defined and determined by spatially heterogeneous operational and environmental conditions. To address this methodological challenge, this paper presents a two-stage semiparametric technique that enables multi-dimensional production possibility frontiers to be estimated from data provided by biophysical models. Specific advantages of the proposed frontier approach are its flexibility with regard to assumptions on the convexity of the production possibility set and its freedom from any separability assumptions for the input–output space and the space of the heterogeneous background variables. The method is illustrated for a case study of 18 Central and Eastern European countries. Results show that opportunity costs of changes in ecosystem services provision differ substantially between regions. Those areas having already relatively high levels of carbon sequestration have a comparative advantage in sequestering carbon. Opportunity costs of biodiversity are generally positively related with the level of biodiversity up to a turning point after which they are negatively related. To illustrate the policy consequences of the observed economies and diseconomies of scope we compare two management regimes to illustrate the potential gains from smart land management.     

Belt and Road: A Road of Opportunity and Prosperity

Agala celebration was held in Beijing on April 26,2019,with almost 5,000 guests from more than 150 countries and 90 international organizations attending the second Belt and Road Forum for International Cooperation.Chinese President Xi Jinping’s 4,000-word keynote speech focused on the present and looking forward to the future.Inspiring and enlightening,this speech depicted a picture of the deep implementation of Belt and Road Initiative.