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933 Uppsatser om Vibration and acoustic engineering - Sida 3 av 63

Militärt stöd till samhället

This report covers a description of the military support attainable to society and made available by the Swedish Armed Forces, in the event of a crisis. The main focal point is the needs of the rescue services..

Utveckling av en ytmonterad fördelningsmätare som underlag för individuell debitering av vattenförbrukning i fastigheter

The master thesis, conducted at Metrima AB, concerns the development of a non-intrusivedistribution meter as a basis for individual tap water billing in apartments.The project is conducted in response to the market interest in individual tap water billing inapartments as an answer to environmental concerns regarding water consumption. Due to thehigh installation cost of traditional water meters, a new method of determining waterconsumption, without having to cut water pipes, is proposed.The proposed method distributes the total water consumption for an apartment complex toindividual apartments according to distribution meters, measuring water run-time, in eachapartment. The water run-time is estimated by measuring the water pipe?s outward vibrationsand temperature changes.A test environment was established and a prototype built, using a tilt- and vibration sensor forvibration sensing and a precision temperature sensor to measure temperature changes. As bothsensors work well in the test environment, further testing was done in 3 apartments for aduration of 5 days.

Användbarhetsutvärdering av det lätta sandwichmaterialet Hybrix för bilkarossapplikationer

This M.Sc. thesis is a material application evaluation commissioned by the advanced body engineering department at SAAB Automobile AB. The purpose of the thesis is to evaluate implementation of the innovative sandwich design material Hybrix into an automobile body. Today the most commonly material used in the body is galvanized steel sheets and by shifting material to Hybrix several problematic issues have to be dealt with. Hybrix is an innovative sandwich sheet that inherits thin stainless steel face sheets and a stainless steel fibrous core.

Förbättrad Kravhantering med hjälp av Lösningsinriktad Pedagogik

Abstract The purpose of writing this thesis was to improve methods during requirements engineering phase. Usercentred system engineering has some problem areas, which are examined and verified to create a new guideline for developers. This guideline tends to make requirements engineering more effective and help developers create more concrete requirements. It is not uncommon that system development projects ends up with unsatisfied users or delay in deliveries. The reasons are different kinds of communication problems between users and developers during verification of requirements. There is a therapy model, called solution-focused therapy, used in family and individual therapy. The model focuses on solutions for the future instead of problems in the past.

Design och konstruktion av sparkcykel för sommar- och vinteranvändning

This thesis has been carried out in collaboration with the IT Company MPQ consulting AB in Halmstad. The task we were assigned by MPQ concerned the development of a scooter that can be used year round. We have with the companydeveloped the criteria and requirements for the product in which the goal is toproduce a primary solution that meets the set criteria and fall within the project'sboundaries.The project involves a wide range of different design methods for idea generationand idea development. The project also addresses engineering methods such asprinciple and primary engineering. Occurringmethods in the project include FredyOlsson principle and primary engineering in cooperation with SVID's - Swedishindustrial design process, etc.The final solution will be presented in the form of sketches, CAD models withassociated drawings and a rendering from the program Keyshot..

Kvalitetsegenskaper på en kravspecifikation

The result from Requirements Engineering is a Requirements Specification. Characteristics of a good Requirements Specification are unambiguity, completeness, verifiability, consistency, modifiability, traceability, correctness and ranked for importance and/or stability.This work defines these quality attributes and answers the questions how to reach these attributes and the diffuculties which exist in this area.This work should be read to get an overwiew of the area Requirements Engineering and Requirements Specification..

Åtgärder för att minimera trafikbullers påverkan på ett rekreationsområde

The aim of this inquiry was to investigate the most appropriate measures to reduce noise impacts from road traffic on the Nydala recreational area in Umeå municipality due to the planned re-routing of the E4 motorway to an existing road along this area. The sound environment is an important part in the experience when we are visiting recreational areas. Noise is not only disturbing; the liberty from unwanted sounds also allows us to perceive natural sounds that are a benefit for the cultural experience. Therefore it is important to take actions to protect this well used area from traffic noise. The reasonable options to avoid noise impact in this case are to lower the speed limit, using a noise reducing coating or use noise protection screens and walls.

Marknadsinriktad Requirements Engineering : kännetecken och centrala aktiviteter

Denna rapport behandlar den marknadsinriktade Requirements Engineering (RE) processen. Allt fler företag väljer idag att implementera standardsystem i sina verksamheter. Den situation som ett standardsystem utvecklas i är annorlunda jämfört med den som ett kundspecifikt system utvecklas i. Detta innebär att den traditionella RE-processen inte är anpassad till dessa nya förhållanden.Syftet med denna rapport är därför att utreda vad som kännetecknar en marknadsinriktad RE-process som stödjer kravhanteringsarbetet vid utvecklingen av ett standardsystem. Rapporten avser även att undersöka hur RE tillämpas av marknadsinriktade systemtillverkare i praktiken.

Automatisk Identifiering av Inandningspauser i Spontant Tal - ett HMM/ANN-hybridsystem i Matlab

This thesis presents a system which has been implemented to satisfy a need in theresearch on how speech planning interacts with syntactic and prosodic structure inspontaneous speech. The long-term purpose of the research is to provide models forautomatic parsing of spontaneous speech and for psycholinguistical modelling of speechproduction. Identification of inhalation pauses is an important step in the developmentof automatic methods for spontaneous speech parsing.Identification of inhalation pauses is considered to be a keyword-spotting speechrecognition problem. Hybrid HMM(Hidden Markov Models)/ANN(Artificial NeuralNetworks) approach is applied to this problem. Method gets 90,8% in Recall, 66,4% inPrecision and 76,7% in F-score.

Hand- och armbesvär hos vibrationsexponerade kyrkvaktmästare

SAMMANFATTNINGBakgrundEn del av företagssköterskans arbetsuppgifter är att arbeta förebyggande och se olika typer av problematik som finns hos arbetstagare och arbetsgivare. Omvårdnad av människan ska stå i fokus och rikta sig mot arbetslivet där en säker och god omvårdnad ges (SOU 2011:63). Vibrationsexponering av händer och åtföljande effekter utgör ett betydande arbetsmedicinskt problem där kyrkvaktmästare utgör en exponerad yrkesgrupp.SyfteSyftet med studien var att kartlägga besvär i händer och armar hos kyrkvaktmästare och deras kunskaper kring riskerna med vibrationsexponering.Metod 50 kyrkvaktmästare besvarande två enkäter, en om symtom och en om arbetsmiljö vid vibrationsexponering av handhållna verktyg och dess risker och skador. Resultatet presenterades som deskriptiva data.Resultat Köldkänsla 40 %, vita fingrar 38 % och kramp 38 % var de vanligaste symtomen. Symtom var vanligare bland dem som arbetat minst 10 år i vibrations exponerade arbete.De hade lite kunskap om riskerna med arbetet.

Jämförelser av olika former av QRA och andra metoder för riskanalys av processindustrier

When performing a QRA you have to consider a number of accident scenarios. How many scenarios you choose often determines the time and resources needed to perform the QRA. The report investigates the possibility that a QRA can be performed using only a few representative scenarios. Further it presents a discussion on how these scenarios should be constructed..

Riskanalys av järnvägen genom centrala Halmstad

The purpose of this risk analysis is to investigate if the transport of dangerous gods through Halmstad is a threat to the surrounding area. The report shall serve as a component in the making of pre-plans and the planning of exercises..

Auditsystem - intressenter och medvärden

This report aims to identify and categorize suitable audit users and furthermore establish with values these users experience. The aim of the report has been fulfilled by analyzing interviews carried out with several companies using audits as a part of their risk management process. In addition to this, theories concerning management have been studied..

Barnröstens förändring under dagen i en anpassad röstinspelning och spontantal : En experimentell studie av perceptuella och akustiska parametrar

A controlled recording in a studio is the basis of all voice treatment. However, this controlled way of recording voice patients' voices can be questioned. The voice use may be different in a natural environment. In children noise related voice problems are investigated in a study about voice and its development (BUG ? Child voice and noise).

Utrymning av folkmassor - simulering och verklighet

The report contains a comparison between computer based modeling of evacuation and evacuation experiments with large crowds. Crowd movement, behavior and management is examined, as well as the evacuation time. The conclusions in this report are based on observations made during the evacuation of a football ground (Swedish)..

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