Benefits Of Various Alternatives Research Articles

Recycling of low-value packaging films in bitumen blends: A grey-based multi criteria decision making approach considering a set of laboratory performance and environmental impact indicators.

Many road construction and maintenance projects are increasingly using recycled material as pavement material. Most of the times, generic sustainability evaluations are ascribed to recycled products without fully considering their performance. The potential environmental benefits of various alternatives can be analytically evaluated with Life Cycle Assessment while many performance indicators can be found through laboratory and field tests. However, it is highly uncommon for these two approaches to be combined in the same assessment methodology and most of the analyses rely on one or the other. Trading off between environmental advantages and performance and durability in the field is considered of utmost importance when evaluating construction alternatives, especially on large projects. This study utilizes recycled plastic packaging films for bitumen modification. The recycled polyolefin blend is a combination of linear low-density polyethylene and low-density polyethylene (LLDPE/LDPE). LLDPE/LDPE was added in bitumen at various dosages (i.e., from 3% to 12% by weight of the bitumen) to assess the effect of recycled LLDPE/LDPE on the binder physio-chemical, rheological and thermal performance. In addition to the various laboratory performance tests, the environmental sustainability of the alternatives was evaluated through an LCA study. Finally, the outcomes from the two approaches (laboratory performance and environmental impact assessment) were combined via grey relational analysis to identify the best overall alternative. It was found that the storage stability of LLDPE/LDPE modified blends varied from 6°C to 57°C whereas the storage stability value of A35P was 2°C. Softening point of bitumen was 44.1°C which improved to 55.7-104.1°C at different content of LLDPE/LDPE. The melting temperature of LLDPE/LDPE modified blends was 100.22, 101.44, 101.87 and 102.49 for LLDPE/LDPE-3%, LLDPE/LDPE-6%, LLDPE/LDPE-9% and LLDPE/LDPE-12%. The methodology highlighted in the paper can be easily adapted to other scenarios, hence facilitating multi-attribute decision-making processes when incorporating recycled materials in roads and leading to better informed decisions.

Modelling a Compensation Standard for a Regional Forest Ecosystem: A Case Study in Yanqing District, Beijing, China

The assessment of forest ecosystem services can quantify the impact of these services on human life and is the main basis for formulating a standard of compensation for these services. Moreover, the calculation of the indirect value of forest ecosystem services should not be ignored, as has been the case in some previous publications. A low compensation standard and the lack of a dynamic coordination mechanism are the main problems existing in compensation implementation. Using comparison and analysis, this paper employed accounting for both the costs and benefits of various alternatives. The analytic hierarchy process (AHP) method and the Pearl growth-curve method were used to adjust the results. This research analyzed the contribution of each service value from the aspects of forest produce services, ecology services, and society services. We also conducted separate accounting for cost and benefit, made a comparison of accounting and evaluation methods, and estimated the implementation period of the compensation standard. The main conclusions of this research include the fact that any compensation standard should be determined from the points of view of both benefit and cost in a region. The results presented here allow the range between the benefit and cost compensation to be laid out more reasonably. The practical implications of this research include the proposal that regional decision-makers should consider a dynamic compensation method to meet with the local economic level by using diversified ways to raise the compensation standard, and that compensation channels should offer a mixed mode involving both the market and government.

The Path to Doing the Right Thing

The Path to Doing the Right Thing

A measure of the net value of ecosystem services and the evaluation of Beijing Plain Afforestation Project

Landscapes generate a wide range of valuable ecosystem services, and valuation of these services provides support for land-use decisions. The most common approach to identifying these tradeoffs is called “payment for ecosystem services” (PES), and when this approach is carefully applied, it has the potential to enhance how ecosystem services are used and improve their protection by signaling the development of a scarcity of environmental resources. However, this approach often ignores the opportunity costs of these services, thereby making the net benefit of the ecosystem services and their responses to land-use change unclear. Therefore, there must be a fuller accounting for both the costs and the benefits of various alternatives, and such an accounting must become the basis for developing policy, reaching ethical decisions, and taking appropriate actions. Through the evaluation of net value of ecosystem services, we can compare the maximum net benefits of alternative land uses, thereby providing basis for decision-making during land use planning, industrial and agricultural programs and ecological and environmental restoration programs as well as socioeconomic and national economic development planning.

Managerial Decision-Making on Moral Issues and the Effects of Teaching Ethics

This study uses judgment and decision-making (JDM) perspective with the help of framing and schema literature from cognitive psychology to evaluate how managers behave when problems with unethical overtones are presented to them in a managerial frame rather than an ethical frame. In the proposed managerial model, moral judgment of the situation is one of the inputs to managerial judgment, among several other inputs regarding costs and benefits of various alternatives. Managerial judgment results in managerial intent leading to managerial action. The model and the effects of taking an ethics course on ethical and managerial judgment and managerial intent were then indirectly tested in this study, wherein subjects judged the ethical wrongness, managerial badness, and the managerial intent regarding decisions made in a case. Forty-nine MBA students analyzed a case involving budget-based bonuses and production, in which the ethical issue evolved over three stages. It appears from the Path-analysis results that managerial judgment mediated between moral judgment and the judgment of managerial intent as suggested by the proposed model, and that taking an ethics course directly affected managerial judgment but did not affect the moral judgment. Additionally, in the first stage of decision-making (early stage of a developing “ethical slippery slope”), moral judgment did not significantly influence managerial judgment. However, students with ethics course still were more inclined to judge the decision as managerially bad as compared to others, indicating that they were more aware or sensitive to the moral issues involved.