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Jan 13, 2014· aggregate(salary ~ state + gender, data, FUN = sum) returns the total salary earned by women (and men) in each state ,but what I really need is salary_w / salary_total on a per-state level. I can write a for-loop, etc -- but I am wondering if there is some way to use aggregate to do that.
Stefan Hochrainer Macroeconomic Risk Management Against Natural Disasters WIRTSCHAFTSWISSENSCHAFT Stefan Hochrainer...
： Outcomes of DiscontinuingRivaroxaban Compared With Warfarin inPatients With Nonvalvular Atrial FibrillationAnalysis From the ROCKET AF Trial(Rivaroxaban Once-Daily, Oral, Direct Factor Xa InhibitionCompared With Vitamin K Antagonism for Prevention of Stroke andEmbolism Trial in Atrial Fibrillation)Manesh R. Patel, MD,* Anne S. Hellkamp, MS,* Yuliya Lokhnygina, P H D,* Jonathan ...
Mar 04, 2016· The ratio of cement sand and aggregates in concrete depends on the grade of concrete ..if you are making an M20-25 grade of concrete you may require around 300-315 Kgs of cement around 800 Kgs of Sand and 1300 Kgs of coarse aggregates ..
The "Harmful Tez~denc y" Ratioz~ale,160 Preventjltg Psychic Inji ury, 262 Combating the Silencing Effect, 162 The Countervailing Co~~stitutionalEghts Ratio~~ale, 163 Harm in the Production of Pornography; 265 Rcduced Protectim for Speech That Attacks Immutable Characteristics, 166 Reduced Protection for Defamatory Attacks on People, 167 ...
Mixing ratio to make 1 yard of concrete. To produce a 3000 psi cubic yard of concrete (27 cubic feet) the concrete mixture ratio is: 1. 517 pounds of cement or (234kg) 2. 1560 pounds of sand or (707kg) 3. 1600 pounds of stone or (725kg) 4. 32 - 34 gallons of water or (132L)
May 10, 2017· Total Aggregate by cement ratio (A/C) decreases with increase in grade of concrete. Higher the Aggregate/Cement ratio leaner the concrete mix, as cement content is lower. Concrete mix can be made more workable by fine tuning Aggregate/Cement ratio. The same is governed by particle size and shape of aggregate used.
Dec 08, 2017· Mix represents concrete with designated proportions of cement, sand and aggregate. And the number following “M” represents compressive strength of that concrete mix in N/mm 2 after 28 days. For example, for M20 grade of concrete mix, its compressive strength after 28 days should be 20 N/mm 2 .
Concrete mix ratio is a vital topic in concrete mix design. The four basic ingredients for making concrete are: Portland cement, sand, aggregate (stone) and water. The strength of concrete mixture depends on the ratio in which these four ingredients are mixed.
May 28, 2010· “Volumetric Batching: First, the 1:2:4 ratio is the ratio of cement to fine aggregate to coarse aggregate, by material volume. There are five parameters we need to identify prior to calculating the mix proportions.