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11690 Uppsatser om Filler; comminuted material used in concrete - Sida 15 av 780
Lyftanordning för kraftuttag
This thesis has been developed inassociation with Strängbetong AB, Sweden.A few years backCementa AB introduced a new type of cement on the Swedish market: Byggcement,which is a Portland Limestone Cement. This type of cement is better for theenvironment and cheaper than Rapid Hardening Cement which is used today at SträngbetongAB.Strängbetong AB isvery interested in a change of cement in the factory and wants to know what ittakes to make a transition from Rapid Hardening Cement to Byggcement.This final projectaims at investigating how the workability and strength development are affectedby a transition from the existing cement to Byggcement and how we can change theproperties of the concrete by adding different types of superplasticizers. Laboratory and factoryexperiments were made, to investigate the transition..
En skattkista?
Mitt examensarbete är en undersökning i att ta tillvara på restmaterial ifrån möbler. Vad kan det medföra i form av estetik och värde? Vad finns det för bra metoder för att ta tillvara på material? Målet är att finna en metod för att förädla ett använt material till något nytt..
Förbättrad styrning av ingående material
Detta arbete har syftat till att undersöka möjligheterna till förbättring av material- och produktionsstyrning vid Sandvik Mining and Construction i Sandviken. Målet har varit att skapa ett underlag för förbättrad styrning av ingående material. Nulägesanalysen visade att förbättringspotential fanns inom klassificeringen av hårdmetallämnen och komponenter. Dessutom var det önskvärt att ett kanbansystem uppfördes på de förslipade hårdmetallstiften som går till den helautomatiska STAMA-cellen. Examensarbetet har gett underlag för en omstrukturering av denna klassificering men även för en framtida uppdatering av den.
Modersmålsstöd i förskola : En intervjustudie om modersmålsstöd på tre förskoleavdelningar i ett mångkulturellt område
The purpose of this study was to broaden knowledge about how native language support works in three pre-schools departments in a multicultural area. The questions were how native support works in the current pre-schools departments, which language development methods and forms used by educators to work with native language support, and if they experience any difficulties. I used interviews as a research method, with three child-care and one preschool teacher.The results showed that all departments on both of the pre-schools have native language support with a permanent bilingual staff, outside the ordinary activity. The mother tongue is also spoken in the everyday activities in two of the departments. The third department is only spoken native language with their children if they do not understand what they say in Swedish, or if they are sad.The concrete material is lifted up as a good and important tool in all three language groups, because verbal language is not always enough for all children to understand.
Badhus
Ett nytt badhus i Västertorp, beläget i den bortglömda, av E4:an dammiga, Mellanbergsparken dit folk kan gå för att bada. Det behövs inga fler simhallar i Stockholm, men ett nytt sorts badhus dit alla olika människor av alla åldrar kan komma och bada i en starkt arkitektonisk miljö - det fattas idag. Därför har jag fokuserat på att gestalta starka rumsligheter där vattnet får stå i fokus och förstärka upplevelsen av rummet. Genom badhuset finns tre olika steg på skalan i material och badupplevelser som går från asfalt till skog, från slutet till öppet. Längst ut mot skogen finns en badsal på 24 x 84 meter där en pelarskog av tegelpelare möter vattenytan.
De talar av erfarenhet : uppfattningar om begreppen demokrati och diktatur hos vuxenelever med utländsk bakgrund
I have in this study examined, through qualitative interviews, how adults with foreign background that are pupils in adult education in Sweden, understand the concepts democracy and dictatorship. Their expressed understandings have been compared with their former life experiences as well as with the aim of the social studies to create a qualitative understanding of essential social concepts. My starting point is theories about the adult in leaning processes. It has been assumed that the adult interprets the world much through former life experiences. I have also relied on the idea that having a qualitative, more scientific, understanding of essential subjects is important for the adult as a member of society and participator in the on-going political debate.
Tidsstudier i kalvuppfödning :
Swedish agriculture stands in front of big changes the whole time. As a milking producer you have to adapt and develop the company to these changes and find the best solution. This potential is easy to find if you compare your company with other similar companies. Labour cost is the biggest cost in milking production after the cost for food. Today it is rather easy to measure how many hours per cow different system of cow houses needs, but we do not know so much about how many hours it takes to breed a calf.
To learn more about the labour time with the calves during the first time after the calf was born, I made time studies on five different farms with calf hutches, automatic milk system, large calf boxes, and smaller calf boxes with teat buckets.
?Konsten är att sovra i allt material? ? om val av material och aktiviteter i ämnet svenska som andraspråk
BAKGRUND: I vår bakgrund redogör vi för den tidigare forskning som bedrivits kring fysiskt undervisningsmaterial i ämnet. Vår teoretiska ram utgörs av Cummins modell för andraspråksinlärning samt Vygotskijs sociokulturella förhållningssätt vilka båda ligger till grund för vår resultatdiskussion.SYFTE: Syftet med vår undersökning är att med utgångspunkt i klassrummets konkreta material studera undervisningssituationer i ämnet svenska som andraspråk, samt undersöka vilka motiv lärare anger för sina val av material och val av aktiviteter.METOD: För att nå studiens syfte använde vi oss utav observationer och kvalitativa intervjuer. I vår undersökning ingår tre lärare på olika skolor som undervisar i ämnet svenska som andraspråk.RESULTAT: I vår undersökning fann vi att lärarna arbetade med ett varierat material och olika aktiviteter i sin undervisning utan att vara styrda av läroboken. Gemensamt för de tre lärarna var att de arbetade med skönlitteratur, läsförståelse och ordkunskap. Resultatet visade också att lärarnas motiv till det material de använde ofta grundade sig på en ambition av anpassning till elevernas tidigare kunskaper och vardagliga liv..
Produktionslogistik, effektiviseringav materialhantering
Atlas Copco Tools is a world leading company in tool manufacturing. The productionin Tierp works hard to improve their assembly to maintain its position. This thesis isa part of their improvement efforts to be a more Lean production.The main focus for this thesis was to identify the material flow in the kanban system,which used to supply the assembly groups, focusing on the material flow to assemblygroup 9 and the assembly group 3. Group 3's material flow within the kanban systemwas perceived to perform better than the group 9. The handling of kanban materialand their working methods in the two groups was identify those differences whichaffected the kanban system.As an alternative material supply a study were done in kiting.
Trafikklasser för markplattor av natursten : förslag till klassificeringstabell
This report deals with hard surfaces and the factors which are behind the criteria for dimensioning, also dependent on the level, or volume, of traffic. A test was made on slabs of two kinds of natural stone. This was made to see if the values that were reached for breakload was transferable to the same tables that the concrete industry is using for surface dimensions of slabs and paving stones. The test showed very high values and the result, together with the written study, led to the author?s suggestion for a classification table where slabs of natural stone were divided in to different classes depending on traffic, thickness and durability..
GNSS-Styrning : Information för platschefer
An investigation of the heat impact of laser cutting on the material properties when producing tensile and impact test specimens of different steel types of varying thickness has been performed. The purpose of the thesis project was to provide recommendations regarding how much material that needs to be milled from the laser cut edge before tensile and impact tests. The study has been performed partly by investigating the test specimens by heat camera when the specimens were cut in the laser cutting line and partly by performing hardness tests, investigation by microscopy, and tolerance and roughness measurements and tensile tests of the laser cut material and material produced in the traditional multi operation machine. The results show that the heat affected zone in the thicker materials is greater than previously thought of, and that the currently used recommendation has to be adjusted. The study clearly shows that the thicker the material, the greater the heat affected zone, independently of the steel type, since the thicker material takes longer time to cut.
En bibliometrisk underso?kning av bibliometrins utveckling : Underso?kning av hur publikationen av bibliometriska, informetriska, scientometriska och webometriska artiklar har utvecklats sedan 1960- talet
The main purpose of this bachelor thesis is to analyse the publication- and citation patterns of the articles concerning bibliometrics, informetrics, scientometrics, and webometrics which can be found on Web of Science, and give a brief description of how the definition of the four terms has developed. I have looked at how the number of published papers have developed over the years and to what extent they have been quoted by other researchers. I have also briefly adressed what other research fields are referring to articles published in the four areas. The material I looked at includes articles that can be found on Web of Science with one (or more) of the four terms as topic and are categorised under library- and information science starting with the first bibliometrics article which was published in 1969, and ending in 2013. The results show that the publications in all four fields are continuously increasing.
Utveckling av en ny tillverkningslina
This report contains results of our study at CTC in Ljungby. CTC produces heating products such as boilers, heat pumps and additional products to their heating systems.The purpose of the report is to make a proposal how CTC will supply their new production line for heat pumps with materials. The proposal includes a production layout and a scheme for how to place the material in the production storage.The new production line will produce two different products and both of them have several variants. The line will also have a mixed flow, so the products can be produced in a random order. These conditions demand that the production line has great flexibility and that the material to all the variants can be stored in the production storage.With these conditions as input we made a layout proposal to the company.
Optimering av betong med Byggcement (CEM II) till håldäcksproduktion
This thesis has been developed inassociation with Strängbetong AB, Sweden.A few years backCementa AB introduced a new type of cement on the Swedish market: Byggcement,which is a Portland Limestone Cement. This type of cement is better for theenvironment and cheaper than Rapid Hardening Cement which is used today at SträngbetongAB.Strängbetong AB isvery interested in a change of cement in the factory and wants to know what ittakes to make a transition from Rapid Hardening Cement to Byggcement.This final projectaims at investigating how the workability and strength development are affectedby a transition from the existing cement to Byggcement and how we can change theproperties of the concrete by adding different types of superplasticizers. Laboratory and factoryexperiments were made, to investigate the transition..
Hur pratar lärare om konkret material i matematiken?
Då jag varit ute på praktik har jag sett att elever allt för ofta bara sitter och räknar i läroboken. Vi matematiklärare måste bli bättre på att variera och börja laborera i vår undervisning. Både för att få med eleverna kunskapsmässigt i undervisningen och för att få dem intresserade och engagerade. Jag har därför i mitt examensarbete undersökt om lärare i år 4-6 använder sig utav konkret material i sin matematikundervisning. Mina problemformuleringar var:- Vad använder lärare i år 4-6 för konkreta material i sin matematikundervisning?- Hur gör lärare i år 4-6 för att konkretisera matematikundervisningen?- Varför väljer de som konkretiserar matematikundervisningen att konkretisera?Metoder som jag använt i min undersökning är litteraturstudier och intervjuer.