Arbit Scratchpad

First short story in the 'CSlueth files' series.  Note: This is purely a work of fiction! 1. The dead body  Wednesday, Chalmers tekniska hogskola, 6:30 PM  He had just walked out of the classroom in the V building. For the past forty five minutes he had been coding an exciting dynamic systems simulation after having completed a late and rather boring simulation exercises session class. He had to take the road in front of the Chalmers Bibliotek library as he wanted to meet a friend staying nearby. As he walked past the Information Sciences department building there was a gust of cold winter wind that struck his face and he raised the collars of this jacket, sinking in his chin into its warm, furry interiors. It was December and it would get dark really early. It was dark now and hardly anyone else around.   He hummed a tune as he ran up the flight of stairs, the library was at an elevated level from the V building. He found himself humming some r...

An Ode to Google ‪#‎DeepDream‬ - Perhaps generated by the same process - I see a scene in a park and start imagining other patterns ...

Accepting Contradictions You want me  To be like you. And I want you  To be like me. Acceptance is hard, you see! You won't change your mind, And I agree with you too! A space where it is impossible  To change your mind - is a dead space.  Bury it. And yes  It's OK to contradict yourself  On a regular basis Else you’re not even thinking ...

Was thinking about an analogy recently while getting back home from the tram station.  Let us assume you are waiting at a bus stand for a particular bus. Quantum physics is akin to saying: Any given bus can be bus route number 5, 10 or 15 (or any other number) with any of the probabilities ranging from 0 to 1 at any time. It transforms into an exact bus number that arrives next when its probability of being that route number becomes 1. Or vice versa.  But if you are on a particular bus the probability being the same route number is always 1. Or unless you have seen the bus yourself its route number is less than one but we cant be certain it might also be zero.  Seems like a joke right? I know at the quantum (or very small scale) it maybe true, but can the analogy be used elsewhere in designing systems?

Probabilistic  Topic modeling provides methods for organizing, understanding, searching, and summarizing large electronic archives. Latent Dirichlet Allocation (LDA) : The simple intuition behind LDA is that documents exhibit multiple topics. In reality, we only observe the documents, the other structure are hidden variables Our goal is to infer the hidden variables i.e. compute their distribution conditioned on the documents:  p(topics, proportions, assignments|documents) . Gibbs sampling for LDA  - Here we sample the topic of a word in one of the documents, given the topics of all other words, the topic distributions and the data. A sample from a recent coursework at Chalmers below: Another instance shown below - for 10 topics:

Population genetics is concerned with the study of the genetic composition of populations. This composition may be changed by segregation, selection, mutation, recombination, mating structure, migration, and other genetic, ecological, and evolutionary factors. Therefore, in population genetics these mechanisms and their interactions and evolutionary consequences are investigated. A gene may have different forms, called alleles. The allelic composition is called the genotype, and the set of observable properties derived from the genotype is called the phenotype. Thus, supposing that there are two alleles A1 and A2, there are three possible genotypes, A1A1, A1A2, and A2A2. In the first and third case, the organism's genotype is homozygous (for A1 or A2, respectively), in the second case it is heterozygous. Genetic material is deoxyribonucleic acid (DNA). It consists of four bases: adenine (A), guanine (G), thymine (T), and cytosine (C). Each base is linked to a sugar and a ...

Dear Mr Bagchi, We have received your entry for the World Hindi Day, which has been selected for an appropriate award. Please confirm your attendance on the flag hoisting ceremony on 26 th  January, 2015 at 0915 hrs at India House 13-A, Villagatan, Stockholm to receive the prize. Regards, J. P. Meena /  जे . पी .   मीणा Minister & DCM /  मंत्री   व   मिशऩ   के   उप   प्रमुख Embassy of India /  भारत   का   राजदूतावास Stockholm /  स्टॉकहोम ,  ईमेल   :  dcm@indianembassy.se दूरभाष : +46-8-107008 /4117090, फै क्स : 248505 Website:  www.indianembassy.se Facebook:  www.facebook.com/ IndianEmbassyStockholm