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4545 Uppsatser om Digital cancellation estimation frequency phase amplitude fast - Sida 49 av 303

Blodlaktat, hjärtfrekvens och skattad ansträngning vid löpning på rullband jämfört med löpning på fast underlag

BakgrundLöpning på rullband/löpband har blivit en allt vanligare ingrediens vid träning på nordliga breddgrader. Rullbandet är också en viktig ergometer som möjliggör att fysiskt arbete kan mätas under standardiserade former. Ett prestationstest som ofta utförs på löpband är ett så kallat laktattröskeltest. Testet går ut på att finna den brytpunkt när laktatproduktionen överträffar förmågan att omsätta eller transportera bort bildad laktat, det vill säga den högsta konstanta hastighet som kan löpas utan att laktatet hastigt ackumuleras i blodet. Om ett sådant test skall kunna användas till att förutse sin tävlingsfart, eller för att hitta rätt hastighet för så kallad tröskelträning, förutsätts det att löpbandslöpning och löpning på fast underlag är likvärdigt.

Digitalt berättande- en studie från tre perspektiv

Syftet med detta examensarbete är att 1) undersöka och beskriva vad digitalt berättande är, 2) redogöra för hur det i allmänhet används idag, samt 3) utvärdera dess potential som pedagogiskt redskap i skolan. Vi har i vårt arbete utgått ifrån socio-kulturell teori. Via intervjuer med personer med erfarenhet av digitalt berättande från Helsingborg och Landskrona har vi undersökt hur digitalt berättande används där. Under namnet digitalt berättande verkar metoden inte användas i skolorna i Helsingborg och Lanskrona. Våra slutsatser är att digitalt berättande används på olika sätt på de två institutioner vi fokuserat på, Dunkers Kulturhus i Helsingborg och Folkets hus i Landskrona.

Informationsutbyte från BIM-modeller : Från BIM-modell till format hanterbara av förvaltning- och GIS-system

BIM has been a trend in recent years when it comes to design and construction ofnew buildings. However, there has been less talk about what happens to BIM modelsafter the construction phase.This issue has been raised at the Forsmark construction documentation department.This thesis aims to look at how the information in a BIM model can be transferred tofacility management and GIS systems and thus add value, even after the constructionphase.Questions raises how such an exchange might look like and whether it is reliable.How should a claim be brought to planners for such an exchange to work.This thesis tested some of the most common methods for this kind of exchange ofinformation from BIM models to facility management and GIS. It was formats like IFC,Fi2xml and a database connectivity that was analyzed by a computer simulation of amodel provided by Forsmark. The model consisted of an existing office building atForsmark, modeled in Autodesk Revit.The results indicate that the formats tested require a precise plotting of the models.The loss of information that came to light in the simulation could be attributed tofailure modeling in Revit. Even such things as naming of areas must be consistent.

Modellering av manövercylindern för Nosstället på JAS39 Gripen

When models are used to describe physical phenomenon during development or modification of a technical system, it is often possible to reduce both the time needed and the overall development cost. With the use of models it is also possible to investigate the potential of the selected solution, without the need for any expensive details and testrigs. In many cases it is also not possible to test all the aspects regarding the functionality that are desired from the system, without using the complete and final product.In this case a model based approach has been used to optimize the different parameters in the new snubbing mechanism for the Nose Landing Gear Retract Actuator on the JAS39 Gripen.During the simulations, upper and lower boundaries were calculated for the length of the spring and the diameter for the restrictor. The governing constraints were given by the requirements for the retraction time during cold conditions and that the amplitude of the alternating loads in the uplock mechanism were brought to an acceptable level.The most promising results from the simulations were then used in a limited number of trials in the hydraulic rig to verify that the configurations comply with the requirements.The final parameters for the snubbing mechanism were chosen to 35±1mm for the spring and 0.4-0.5 mm diameter for the restrictor..

Wobblerpump

The task was to design and manufacture a submersible displacement pump working with the wobble plate principle. The main task for the Wobble plate pump is to be used as a sewage pump for smaller households or dewatering pump in environments where small flows and high pressures are acquired. For these purposes ITT Flygt sell a screw pump, PC-Grinder 3068. The hydraulic part of the PC-Grinder is manufactured by a subcontractor. Therefore ITT Flygt wants to evaluate an alternative to their screwpump PC-Grinder, which can be entirely manufactured by them self.

Upplevda oönskade beteenden hos katt : förekomst och orsaker till dessa

The objective was to examine the frequency of unwanted behaviors in the Swedish feline population and what factors in the environment, inheritance and past life that have an influence on the frequency. SLU?s web poll generator was used to create a web poll which insinuated that it was a poll with objective to make an inventory of the Swedish feline population. I wanted to avoid that only owners to cats with unwanted behaviors answered the poll. The web link to the poll was sent to SLUs students and posted on Internet forums for people interested in cats.

Ekoanalys-modell : En förenklad modell för att kunna belysa miljöpåverkan redan i designstadiet av en produkt

The environmental debate is more intensive than ever before and the demands on companies increase. There are a number of methods to make it easier for the companies to fulfil the demands. Life Cycle Assessment (LCA) end ecodesign are some of the methods that can be used. Syntronic AB has the possibility to reduce the products´ environmental impact in the design phase. Therefore it is important for the company to make it possible to visualize the negative environmental impacts a product can cause in an easy way. It is also important to visualize for there clients if any improvement is possible. The purpose of this thesis is to develop a simplified model.

Smart consumer. En studie om påverkan av den digitala kommunikationen på konsumentbeteendet

Dagens dynamiska situation på marknaden sätter spår på den befintliga marknadsfilosofin med fokus på kommunikationen mellan företaget och konsumenten. Den moderna teknologin och Internet har utvecklats och blivit mer tillgängliga, vilket har bidragit till att den moderna konsumenten tillbringar en stor del av sin tid på Internet. De digitala nätverken och kommu-nikationen inom dem förändrar konsumentbeteenden och attityder, främjar konsumenters självständighet samt ger kontroll över köpbesluten. De här trenderna påverkar dagens detalj-handel, där konkurrensen och kampen om kundernas lojalitet ökar. Konventionella marknads-föringsstrategier föråldras snabbt under dagens förlopp och kräver mer kreativitet och enga-gemang av företaget.

Magasin i nya medier - Konkurrent eller komplement till pappersversionen?

Det papperslösa samhället har varit ett begrepp i över trettio år, men än läser vi tidskrifter och magasin i pappersform. Vi konsumerar dock dagligen allt mer information och mycket av denna är i digital form. Tidskriften är en produkt som liksom CD-skivan är möjlig att helt och hållet digitalisera. Kanske är det en anledning till att upplagorna minskar för många tidskrifter i Sverige? Denna rapport syftar till att nå en fördjupad förståelse för hur svenska tidskrifter möter den digitala utvecklingen i fyra kanaler; webbplats, Twitter, Facebook och applikation för iPad (digital utgåva).

Kartläggning av energianvändning under byggfasen vid nyproduktion av flerbostadshus

The energy consumption in the sectors of residential and public buildings is 40 % of the total energy consumption in Sweden. The main part, 85 %, of the energy use in these sectors is for operation of the buildings. The rest is used in the building process. When energy-efficiency measures are taken the energy use during the operation time decreases and the fraction of energy consumption during the building time increases. This project is carried out in cooperation with JM AB and concerns the energy use during the building time of production of blocks of flats at the building site.The main part of the electricity that is used during the production of apartment buildings goes into the heating of portacabins and illumination of the building during the construction phase.

Characteristics of Swedish gilts at service and producers? opinions about gilt production

In Sweden, selection for leanness in pigs has been going on for almost a century. This sometimes results in gilts and sows being too lean and consequently in a risk for reduced reproduction and health status. The Swedish recommendation includes that gilts should be mated after seven months of age, after one documented oestrus, at 120-140kg live weight and with a backfat thickness of 16-20mm. Five gilt producing herds were visited and records of age, heart girth (for weight estimation), body condition (visual estimation), backfat thickness and exterior were made. The same records were also taken in four gilt buying herds on newly purchased gilts.

Selection of habitat and resources during migration by a large mammal : a case study of moose in northern Sweden

Migration is a worldwide phenomenon that has occurred for thousands of years in a vast variety of species. The general knowledge of migrating animals is poor even though billions of animals from a range of different groups migrate every year. The human impact on migrating ungulates is high and many populations are declining globally due to direct and indirect causes. Hence it becomes vital to study the migration phase and the habitat and resources selected during migration. The objective with this study was to identify the habitat characteristics and resource selection of moose during migration and compare the selection between different seasons and utilization distribution (relative frequency distribution for the points of location of an animal over a period of time) categories.

OAIS i praktiken - En studie av OAIS-användning vid skapandet av ett digitalt arkiv

OAIS (Open Archival Information System) är ett uttryck som blir allt vanligare inom digital långtidsbevaring, och är en standard som kan vara till hjälp vid skapande och drivande av digitala arkiv. I denna uppsats har vi undersökt praktisk användning av OAIS i ett samarbe mellan sex arkiv i Lund, som i ett projekt ska implementera ett framtida digitalt arkiv. Vi har följt det inledande arbetet med att skapa en egen modell för ett regionalt digitalt arkiv där man har tagit OAIS-standarden som utgångspunkt. Syftet med uppsatsen var att undersöka hantering och omfattning av OAIS för att sedan kunna presentera ett resultat som kan vara till användning för framtida projekt inom digital långtidsbevaring som ska använda OAIS. Insamling av empiriska data har huvudsakligen gjorts med hjälp av observationer av arbetet och semistrukturerade intervjuer med projektmedlemmar.

Från Tahrirtorget till ett(o)demokratiskt Egypten? : -Demokratins förutsättningar och utmaningar i Egypten, efter den arabiska våren 2011

The aim of this bachelor thesis is to through a theoretical analyze, investigate the conditions and the challenges for a consolidated democracy in Egypt from 1952 until after the revolution of 2011. The central question in this thesis is what opportunities and challenges are there for the democratic consolidation in Egypt, with respect to civic, political and economic conditions. How have the conditions developed between 1952 and 2011? How has the transition government/military government handled the central problems in the transitions phase after 2011? The theory used in this analysis is Linz and Stepans famous five arenas (the political society, the economic society, the civil society, the bureaucracy and the state of rule, whit focus on the three first). Through a qualitative case study we have analyzed the conditions in Egypt from 1952 to after the revolution 2011.The empirical material shows that the arenas in Egypt are both historically and current very weak, and they are not supporting democratic consolidation as they are challenged by several enormous problems.

Mätning av partikelmassa i avgaser från en dieselmotor

This master thesis was a continuation of a previous study in the diesel exhaust characterization, which is part of the academical work embedded in the EMIR-1 project. The main objective of this thesis work was to finish the installation and make the proper modifications of the particulate mass measuring system located in one of the engine test cells at KTH, in order to be able to measure the mass of the particles from the exhaust of diesel engines.This experiment requires a diluted flow sample from the exhaust that should be sent to the device that makes possible the measurement of particle mass, called TEOM. In the first stage of this project, the objective was to study and make the proper modifications in the existing KTH diluter because there were several problems to obtain a constant dilution ratio from it during tests.This modifications were made and it resulted in a great improvement in the maximum inlet and outlet flow that this diluter can handle. Therefore another modification is proposed for controlling the inlet exhaust flow so it will be possible to regulate the dilution ratio and make it constant along a wide range of engine loads and speeds.The second and most important stage was to make particulate mass measurements possible by analyzing the frequency signal from the TEOM device. The idea was to obtain the frequency of oscillation from the tapered element in the TEOM, and therefore with the proper correlations, be able to predict the particulate mass concentration in the exhaust flow from the engine.An electrical problem in the TEOM circuit was detected and corrected, so the signal that carries the frequency from the TEOM can be analyzed properly.

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