A Dynamic Approach to the Environmental Effects of Trade Liberalization

In this paper, we develop a two-country world di¤erential game model with a polluting firm in each country where there is transportation cost to investigate the equilibrium of the game between firms when they decide to trade or not and to see under which conditions social welfare coincides with the market equilibrium. We find out that in the static game bilateral trade is always the equilibrium for any acceptable transportation cost while in the dynamic game social planner can prevent the inefficient outcome by imposing and determining the proper amount of Pigouvian taxation.

Using Auctions for Pollution Rights as Indirect Incentives for Investments in Green Technologies

Acquired wisdom has it that the allocation of pollution rights to firms hinders their willingness to undertake uncertain R&D projects for environmental-friendly technologies. We revisit this issue in a model where firms strategically choose whether to participate in an auction to attain pollution permits, or instead invest in green R&D, to show that, somewhat counterintuitively, a side effect of the auction is in fact that of fostering environmental R&D in an admissible range of the model parameters.

Application of Screening Analyses for the Stability of Landslide in Seymareh Dam Project

Seymareh dam and hydropower plant project is located in western province of Ilam, in Iran. This concrete arch dam with 178m height and 196 m crest length is to be placed on Seymareh River, the axis of which is located on the north wing of an anticline including Asmari limestone layers. The dramatic variation of dip angle of bedding in this part of anticline has created many fractures that result in slides. In October 1st 2003, when excavation in the left bank was being operated to construct an access road to the valley, a large landslide triggered on the top of power tunnel intake. The landslide complete in November 10th 2003 few hours after an intensive rainfall by leaving some 300000 m3 mass of debris. The sliding was a planar failure on a thin marly limestone of 26° dip and 40 cm thick. Due to the future location of water intake structure at the entrance part of power tunnel, it was quite vital to save this structure from any further movements of the debris left by the landslide. Further investigations showed that this is possible to keep debris in place by flattening the material in forms of stable slopes and berms. In order to decrease the remedial costs, the new recommended method of screening analyses for seismic stability proposed by SP117 Guideline in southern California Earthquake Center (2002) was adopted. Finally using this method, a slope design with almost minimum costs was achieved. This paper contains a description to geotechnical conditions, the history of landslide, and remedy works to protect water intake structure

Groundwater Lowering in Deep Excavation (Case Study: Foundation Excavation of Shahid Madani Dam)

In many big civil constructions, deep excavation is an essential part of project and groundwater control in excavation process is the prominent tasks. In this paper while mentioning the risks of deep excavation, the solutions of underground water control have been explained and different methods of groundwater control in regard to financial conditions, different soil condition and various depths have been investigated. Groundwater control in foundation excavation of Shahid Madani Dam as a case study is presented. Depth of foundation excavation was about 50 meters in tight valley and excavation was performed under groundwater table. This excavation is one of the deepest excavations in Iran and it has some specific problems related to topographical and geotechnical condition in dam site. Finally the proper methods for groundwater control are presented and recommended. Measurements in excavation period and in the middle of dam body construction have shown that this design method had a good performance

Analysis of Buried Pipes Under Traffic Loading Accounting For SOIL-Structure Interaction

Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

Effect of continuous care model on emotional health and social connection aspects of quality of life of infertile women

Background and aim: Infertility and its treatment affect as a crisis on various aspect of quality of life in women that is the most important aspects of quality of life of emotional issues and social connection. The aim of this study was to determine the effect of continuous care model on emotional health and social connection in infertile women. Methods: In this semi-experimental study, 80 infertile women referred to infertility centers affiliated with Tehran University of Medical Sciences during 2015 were entered into study by simple (convenient) sampling method. The data were collected by demographic characteristics questionnaire and fertility quality of life questionnaire (FertiQol). 2-3 training session was held for implementation of continuous care model. Quality of life in infertile women was evaluated during two stages: before intervention and 2 months after intervention in evaluation stage. Data were analyzed using SPSS by the Independent t-test, Paired t-test, Chi-square and Exact fisher test and p< 0.05 was considered significant. Results: in the case and control groups, mean of quality of life in emotional health after the intervention was 16.75±3.572 and 8.85±3.971 and in social connection was 17.98±2.922 and 11.45±3.672, respectively. A significant difference between intervention and control group was observed (P=0.002). In the control group, a significant decrease in scores on emotional and social areas after the end of the intervention was observed (P<0.001). Conclusion: Implementation of continuous care model improves emotional health and social connection in infertile women. It is recommended that continuous care model to be used as a easy, affordable and available care model