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Senast inlagda
Automation of greedy algorithm for segmentation with minimized exception : binary for EEG burst detection homogenous string segmentation
(2009) Sahu, Swapna Sarit
A survey has been carried out to investigate, various homogeneous criteria and algorithms used for string segmentation. An efficient implementation of greedy algorithm for SME – Binary (segmentation with minimized exception) is carried out for EEG signal burst detection. The result of greedy algorithm is analyzed in the context of successful burst detection for various values of threshold and number of segments. An automation of this greedy algorithm is purposed for the burst detection in EEG signal. The results obtained form this automation is analyzed.
Greedy algorithm for SME-Binary is able to detect bursts. But it is not very successful for a single value of threshold. It is also not known for what value of k (number of segments in a given string), the algorithm will successfully recognize all bursts as k is an input parameter to this algorithm. Automation of this greedy algorithm is quite successful in recognizing the bursts in the EEG signal. The main advantage is, it is independent of value of k and threshold. This algorithm is also quite fast in detecting bursts. The disadvantage is, some bursts are recognized by number of segments rather than a single one. So to count the number of bursts a clustering algorithm is required to enhance this automation. This is purposed as a future work in this report.
CAN-drivers & graphical user interface in LabVIEW
(2008) Karlsson, Kenneth; Liljekrantz, Johan
Lab VIEW® is a widely used programming tool for creating graphical user interfaces. CAN is the
most common protocol for communication in cars. In this thesis the combination of the two is
studied.
This thesis documents the testing of the USB-8473s hardware for CAN-communication using
Lab VIEW® as a programming tool. Drivers for the hardware were developed and standardized.
Also a graphical user interface with capabilities of diagnostics using the D2-protocol, graphical
monitoring of CAN-channels over time, logging CAN-traffic, basic CAN-communication as well as
a demo-mode for demonstrating the connection between a computer and the car have been
developed.
The graphical user interface was designed with a flexible structure that was event based, making it
easy to implement additional features. The report also covers the structure of the program and some
programming details.
Alternative solutions for pilot organizations -with safety perspective
(2010) Kotilainen, Pentti
The aim of this study is to find alternative ways to organize pilotage in Finland. There
are two important changes under preparations right now. The one is a new Pilot Act and
the other is the type of entire pilot organization. These two are interdependent but
implemented, at least partly, by different institutions. There have been a lot of
discussions on such issues as monopoly vs. competition or governmental vs. private.
The focus has anyhow been on economics or legal matters.
The safety in pilotage has not been an issue in those discussions. One reason for this
might be that decision makers need more information about safety.
Safety Management System is compulsory for ships and shipping compames
internationally but not yet for pilot organisations.
Many pilot organizations have acknowledged the importance of Safety Management
System and started to work on the issue.
In this study interviews were used as an essential method to get information on how
various pilot organizations have arranged their safety related matters.
The interviewees were carefully chosen and include representatives from various types
of pilot organizations.
When comparing how various pilot organizations are handling their safety matters it
could be noticed that the private pilot organizations have been most active on this. The
governmental pilot organizations are still preparing their systems but have not
implemented those yet. The Finnish State Pilot Enterprise, Finnpilot, has not any Safety
Management System.
Finnpilot's 'job satisfaction survey 2010' shows that employers are very disappointed
with the senior management and they want to become governmental civil servants.
The private Dutch pilot company together with the European Maritime Pilots
Organization (EMPA) has developed the 'International Standard for Pilot
Organisations' (ISPO Code) which is a safety management system. The Dutch pilots
have implemented the 'ISPO Code' into their organization and it is audited (outer
audits) by Lloyds Register, which is a classification society.
Det Norske Veritas (DNV), which is another classification society, has also been active
on safety management in pilotage and has introduced the 'Rules for Pilot
Organisations'. These rules are presented as a part of this master thesis.
FE-modeling and validation of a washing machine : Using experimental modal analysis and spin up test
(2009) Andersson , Tobias; Hansson , Tobias
In this master thesis the dynamics in the steel shell of a washing machine from ASKO
Appliances AB has been studied. The thesis is the third in a series where the first
studied the behavior of a side plate and the second studied the dynamics in half of the
steel shell parts. In this work all parts are first studied separate and then assembled to
the steel shell. Additionally a model will be made of the parts needed to simulate the
spin up of a washing machine. The goal of the thesis work is to make a model of the
steel shell that correlates well with the real steel shell and to be able to simulate the
forces and accelerations in the shell that arises from a spin up in the drum of the
washing machine.
Every detail has been modeled using finite elements and validated using experimental
modal analysis. The parts already studied will also be modeled in order to match the
results from the previous year's thesis works. The results show that each separate part
correlates well in most modes when comparing mode shapes, eigenfrequencies and
frequency response functions.
The models are assembled into the steel shell and validated in the same manner as
each separate part. The result from these studies shows that a good correlation is
obtained in the steel shell up to about 60 Hz. Above that, the mode shapes are getting
more complex and harder to correlate. There are some differences in eigenfrequencies
between the model and the real steel shell. The problem with the side plate correlation
of previous thesis works have been found to have minor importance when the steel
shell had been fully assembled.
The model used to calculate accelerations and forces in the machine during rotation of
an unbalanced loaded drum showed a rather poor correlation. The reason is that
higher order harmonics have more impact on the vibrations in the shell than first
thought. The forces under the feet and the accelerations in the side plate were the
results that matched the measured data best.
Dubbel väsentlighetsanalys, lätt som en plätt…eller? En processrapport från att använda ESRS
(2025) Huang, David; Luc, Nicky
European Green Deal är en strategi från EU-kommissionen vars huvudsakliga mål är att göra EU klimatneutralt senast 2050. Strategin kommer som ett stort paket med många delmål och initiativ såsom: CSRD, ESRS, Fit for 55, REPowerEU m.m. Stora delar av studien lägger fokus på just CSRD som är en viktig del av European Green Deal och syftar på att skapa en standard för hållbarhetsrapportering, kallas ESRS, vilket ska möjliggöra jämförbarhet hos miljöpåverkan bland företagen. De höjda kraven ska göra att “greenwashing” minskar och att informationen blir mer transparent och tillförlitlig. En central del av CSRD är genomförandet av en dubbel väsentlighetsanalys som består av en sammanvägning av miljödata och finansiell data. Studien genomfördes i samband med en fallstudie hos Elajo. Syftet med studien var att utforska användbarheten av CSRD för miljöanpassning samt identifiering av nya affärsområden eller innovationer. En slutsats med studien är att CSRD har skapat en del förvirring och svårigheter kring arbetet med dubbel väsentlighetsanalys. Analysens relevans är kopplad till organisationens datainsamling och förståelse för miljöbelastningen ur ett livscykelperspektiv.
Studiens huvudsakliga metodval var att använda ESRS beskrivningar av dubbel väsentlighetsanalys. Att förstå Elajos verksamhet var också viktigt för studien och detta möjliggjordes med ett studiebesök på huvudkontoret i Oskarshamn. Eftersom European Green Deal är ett stort och omfattande arbete avgränsades studien till CSRD och tillämpningen av dubbel väsentlighetsanalys på Elajo. Fit for 55 analyserades även översiktligt för att undersöka nya innovationer som utvecklas för att uppfylla de målen som EU-kommissionen har uppsatt.