2 research outputs found
Valanlys.se: A Graphical Trend Analysis Tool - Visualizing Political Trends From Semantically Analyzed Twitter Posts
The Internet has during a relatively short period of time changed peopleâs perception
on information and its availability. It has never before been so easy to
get information about practically anything, just a few clicks away. The problem
today is that we are living in a society with an information overflow, it can be
really time consuming finding relevant facts in the ocean of data. A young entrepreneurial
company, Saplo AB, thought of a solution: let the computers find
whats relevant for us and save us both time and effort. They created a highly
advanced algorithm that works in a similar fashion to the human brain. With the
algorithm computers can now read, understand and sort text. Saplo has so far
only focused their services toward other companies but now they want to show
the rest of the world that their technique is capable of. This master thesis aims
to provide Saplo with a platform for information visualization, a tool to visually
present the result of their technology. To narrow down the work, the Swedish
election was chosen as the subject for this master thesis. What it tries to answer
is: "How to create a real-time feedback system for the political environment with
automated trend-analysis?"<br>
The master thesis goes through all necessary steps to complete this visualization
tool from research to implementation and testing. The project results in
a fully functional website that gathers tweets (messages) from Twitter that are
related to the Swedish election. All the tweets are sent to Saplo to be analyzed
and are there given a trend index. They are then forwarded to the website and
presented in real-time. The trend index is used to draw a trend for the political
party that the tweet is concerning. The master thesis also discusses possible
improvements and interesting ideas for further development.<br><br>
Internet har pÄ relativt kort tid förÀndrat vÄr syn pÄ information och dess tillgÀnglighet.
Det har aldrig tidigare varit sÄ enkelt att fÄ tag pÄ information om
praktiskt taget vad som helst, bara nÄgra mus-klick bort. Problemet Àr snarare
att vi i dagens samhÀlle drunknar i för mycket information, tiden lÀggs istÀllet pÄ
att sortera ut relevant information. Ett ungt entreprenörsmÀssigt företag, Saplo
AB, har kommit pÄ en lösning: lÄta datorerna hitta vad som Àr relevant information
och spara oss bÄde tid och anstrÀngning. Saplo skapade en högst komplex
algoritm som arbetar pÄ ett liknande sÀtt som den mÀnskliga hjÀrnan. Med denna
algoritm kan datorer nu lÀsa, förstÄ och sortera text för oss. Saplo har Àn sÄ lÀnge
endast fokuserat sin service mot andra företag men nu ville de ta steget att visa
vÀrlden vad deras teknik Àr kapabel till. Examensarbetet försöker tillhandahÄlla
Saplo en plattform för informations visualisering, ett verktyg för att visuellt presentera
resultatet av deras teknologi. För att begrÀnsa arbetet till en rimlig nivÄ,
valdes det svenska valet som Àmne för detta examens arbetet. Examensarbetet
vill besvara frÄgestÀllningen: "Hur skapar man ett real-tids feedback system för
politiska klimatet med automatiska trendanalyser?".<br>
Vi gÄr igenom alla nödvÀndiga faser i utvecklingen, frÄn undersökning till implementering
och testning. Projektet resulterade i en fullt fungerande hemsida som
samlar in tweets (meddelanden) ifrÄn Twitter som Àr relevanta till det Svenska valet.
Alla tweets skickas till Saplo för att bli analyserade och ges dÀr ett trendindex.
DÀrefter skickas de vidare till hemsidan för publicering i realtid. Tweetets tillhörande
trendindex anvÀnds för att rita upp en trend för det parti som tweetet nÀmnde.
Examensarbetet kommer Àven ta upp en diskussion angÄende förbÀttringar och
förslag pÄ framtida förÀndringar
Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo
International audienceIntermediate-mass black holes (IMBHs) span the approximate mass range 100â105âMâ, between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass âŒ150âMâ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200âMâ and effective aligned spin 0.8 at 0.056 Gpcâ3 yrâ1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpcâ3 yrâ1.Key words: gravitational waves / stars: black holes / black hole physicsCorresponding author: W. Del Pozzo, e-mail: [email protected]â Deceased, August 2020