PPT-Empirical Study of Topic Modeling in Twitter

Liangjie Hong and Brian D Davison Computer Science and Engineering Lehigh University Bethlehem PA USA SOMA 2010 Why we care about text modeling in Twitter SOMA 2010 Why we care about text modeling in Twitter . scientific . papers and researchers on . Twitter: Results . of two studies. Stefanie . Haustein. , Timothy D. Bowman, Kim Holmberg, . Vincent Larivière, Isabella Peters, Cassidy R. Sugimoto, . & Mike . Week 22 Chemistry. Warm Up: . 3. Minutes. A certain bag of M&M’s has 8 blue candies, 7 red candies, 4 green candies, and 6 yellow candies. What percentage of the bag is blue M&M’s? . Record your Learning . Molecular Formulas. Let’s use those mole conversions!. Empirical formula . tells you the lowest ratio of atoms within a molecule. Molecular formula . tells you the actual ratio of atoms within a molecule. You should know this for the quiz!. Empirical and Molecular Formulae. Empirical Formula. If needed, change % to g.. Do . a molar conversion to change from . g. mol. Divide each of these numbers by the smallest number. Objectives. To learn how to work out the percentage composition by weight of a compound. To use percentage composition to work out empirical formulae. Percentage compositions. This means what percentage of each element is present in a compound, and therefore tells you what masses of each element are present in any given mass of a compound. . Chemistry GT 3/20/15. Drill. Calculate the percent composition of Na. 2. SO. 4. .. HW: Molecular Formula WS (pg. 4). MM. =142.05 . g. /mol. 32.37% Na, 22.58% S, 45.05% O. Chem. Joke of the Day. The photon checked into a hotel. What did it say when the bellhop asked for its bag?. The Mole. Chemist’s counting number. amount. of a substance . 1 mole is equal to 6.022 x 10. 23. atoms or particles or molecules (Avogadro’s number). There are always 6.022 x 10. 23 . particles in . Due at end of Period. The compound . benzamide. has the following percent composition. What is the empirical formula? . C . = 69.40 % H= 5.825 % O = 13.21 % N= 11.57 % . 2. A . component of protein called serine has an approximate . Main Title Here. Topic 1. Topic 1 title goes here. Your text here. Your text here. Your text here. Your text here. Your text here. Your text here. Your text . here. Your text here. Your text here. Your text here. Lowest whole # ratio . H. 2. O. 2. (hydrogen peroxide) is it a empirical Formula?. No, you can reduce it to HO . . H. 2. O. 2 . is the molecular formula. Molecular formula shows the way the molecule is actually found in nature.. Percent Composition. ~percent by mass of atoms present in a compound. = (mass of atom). . (total molar mass) x 100. water is . 88.81 . % Oxygen and . 11.19 . % Hydrogen. O- 16.00/18.016 x 100 = . 88.81 . Daniel Friedman, R. . Mark . Isaac, . Duncan . James . , and Shyam Sunder. Fifth . LeeX. International Conference on . Theoretical and Experimental Macroeconomics . Barcelona GSE Summer Forum, . Universitat. It’s no secret that this world we live in can be pretty stressful sometimes. If you find yourself feeling out-of-sorts, pick up a book.According to a recent study, reading can significantly reduce stress levels. In as little as six minutes, you can reduce your stress levels by 68%. Alan Ritter (UW). Colin Cherry (NRC). Bill Dolan (MSR). Twitter. Most of Twitter looks like this:. I want a . cuban. sandwich extra bad!!. About 10-20% are . replies. I 'm going to the beach this weekend! Woo! And I'll be there until Tuesday. Life is good. .