223 Precipitation Evaluation of Round- and Square-patterned Impact Sprinklers

Precipitation Evaluation of Round- and Square-patterned Impact Sprinklers

In the fall of 1999, two types of impact sprinklers were evaluated to determine the distribution of precipitation under normal operating conditions. The sprinkler types included a traditional round-patterned design (Rain Bird Maxi-Bird) and a recently developed sprinkler delivering water in a square pattern, called Square Shooter. The squarepatterned sprinkler was more precise in delivering a u...

Square Pegs and Round Holes

This article explores the relationship between the social construction of risk, uncertainty and evaluation in the field of development cooperation. It explores the assumption that risk and uncertainty are unusually high in development cooperation. Perceptions of risk and uncertainty are cultural constructs. Several authors have identified perceptions of uncertainty as one of the most important ...

Patterned MoS2 Nanostructures Over Centimeter-Square Areas

– [1] Y. Xia, P. Yang, Y. Sun, Y. Wu, B. Mayers, B. Gates, Y. Yin, F. Kim, H. Yan, Adv. Mater. 2003, 15, 353. [2] a) M. S. Whittingham, Chem. Rev. 2004, 10, 4271. b) M. M. Thackeray, Prog. Solid State Chem. 1997, 25, 1. c) S.-J. Hwang, H. S. Park, J. H. Choy, G. Campet, J. Phys. Chem. B 2000, 104, 7612. [3] a) J. Kim, A. Manthiram, Nature 1997, 390, 265. b) S.-J. Hwang, C. W. Kwon, J. Portier, ...

hazard evaluation of gas condensate stabilization and dehydration unit of parsian gas refinery using hazop procedures

شناسایی مخاطرات در واحد 400 پالایشگاه گاز پارسیان. در این پروزه با بکارگیری از تکنیک hazop به شناسا یی مخاطرات ، انحرافات ممکن و در صورت لزوم ارایه راهکارهای مناسب جهت افزایش ایمنی فرا یند پرداخته میگردد. شرایط عملیاتی مخاطره آمیز نظیر فشار و دمای بالا و وجود ترکیبات مختلف سمی و قابل انفجار در واحدهای پالایش گاز، ضرورت توجه به موارد ایمنی در این چنین واحدهایی را مشخص می سازد. مطالعه hazop یک ر...

Square peg in a round hole.