PURPOSE To compare the effectiveness of pars plana vitrectomy (PPV) with either silicone oil or gas tamponade for the treatment of traumatic macular holes. METHODS A retrospective comparative study included 22 patients who were operated on by PPV for repair of traumatic macular holes with either silicone oil tamponade (nine patients) or perfluoropropane (C(3)F(8)) gas tamponade (13 patients)....

Oil and natural gas production is often accompanied by large amounts of wastewater [1]. The volumetric ratio of water-to-oil will increase over the lifetime of an operation and can eventually exceed 90%. Water is also associated with some, but not all, gas production. For instance, dry sources of gas are found in Alberta, Canada. Produced water is often reinjected into the well to increase oil ...

This research presents a model for optimal allocation of Iranian oil and gas resources in sanction condition based on stochastic linear multi-objective programming. The general policies of the resistive economy include expanding exports of gas, electricity, petrochemical and petroleum products, expanding the strategic oil and gas reserves, increasing added value through completing the petroleum...

in recent decades energy sector has been most important division in sociopolitical national and international dialogs. policy making in energy sector in iran is a strategic subject because of independency of our national revenue to oil & gas export in one way and huge oil & gas reservoirs in iran (137 billion barrel in oil and 28.3 million cubic meter in gas) in other hand. this paper investiga...

OBJECTIVE To demonstrate the effectiveness of the commercial introduction of red palm oil (RPO) as a source of vitamin A (VA) for mothers and children in a non-consuming area, as a dietary diversification strategy. DESIGN A pre-post intervention design (no control area) was used to assess changes in VA intake and status over a 24-month pilot project. SETTING AND SUBJECTS The pilot project i...

Oil and gas construction projects are of great importance to support facilitate the process operation production. However, these usually face chronic risks that lead time overrun, cost poor quality, affecting projects’ success. Hence, this study focused on identifying, classifying, modeling risk factors have negative effects success in Yemen. The data were collected through a structured questio...

The oil and gas industry will continue to boom in the coming few decades. Obtaining oil and gas from conventional and non-conventional resources will become more and more challenging. This intensifying need will impose very considerable demands on work force, financial and technology capabilities. Since the future supplies of oil and gas are to expand, advanced technology will become increasing...