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551 Uppsatser om Mechanical rock excavation - Sida 11 av 37
Structure and tree diversity of lowland limestone forest on Seram Island, Indonesia
There have previously been very few studies of forests on Seram Island in the Eastern Indonesian archipelago and none before on lowland limestone primary forests. The COLUPSIA project on collaborative land use planning has therefore chosen Seram as one of two project sites. The objective of the COLUPSIA project is to establish collaborative and equitable land use planning. In order to achieve its objective the COLUPSIA project aims to improve understanding of traditional resource management and how it interacts with governmental systems, as well as enhancing knowledge about tropical landscapes and ecosystem services.The aim of this study was to contribute to the COLUPSIA project through describing lowland limestone forest on Seram Island in respect to (1) forest structure, (2) tree species richness and (3) tree species composition. We set up 5 plots, each of 0.2 ha, at one site, Mawalai, and collected data on tree variables (tree diameter ?10 cm) as well as for some other life forms and environmental data.
Halvledare för höga strömmar i fordon
Mechanical relays are more and more being replaced with semiconductortechnology. In this thesis it is investigated if and how the larger loads couldbe controlled by transistors. The main part of this work aims to create andverify a solution that can control the starter motor, as well as protect it incase of any failure. The different malfunctions that the solution protectsagainst is high current, too high peak current, low current, maximum cranktime and minimum cool off time. The timers also protect indirectly againstoverheating of the starter engine.The transistors used are BTS555, from Infineon.
Rock?n?roll: En studie av roller i ensembleundervisning
Den här fallstudien behandlar rollbildning i en specifik ensemble utifrån givna rollfunktioner. Våra informanter i ensemblen har utgjorts av en grupp folkhögskolestudenter. Studien bygger på en kvalitativ forskningsmetod i form av observationer. Bearbetningen av de inspelade observationerna har skett genom en transkribering och analys av denna. De viktigaste slutsatserna i vårt arbete har varit att det går att identifiera roller utifrån våra givna rollfunktioner och att det går urskilja ett mönster i rolltagandet.
Princip för borttagning av truckströn
Under vårterminen 2014 har jag omarrangerat rocklåtar till så kallade ?udda taktarter?. Meddet menas att jag har tagit en låt och bytt taktart från fyrafjärdedelstakt till en taktart manvanligtvis inte stöter på så ofta inom genrerna pop och rock. Jag har även analyserat pop- ochrockmusik som redan har udda taktarter för att få inspiration. Jag har intresserat mig för hurdet ?udda? uppstår och hur man kan motverka eller förstärka det.
Studie av smörjsystem
Målet med detta arbete är att undersöka smörjsystemet på två utsatta leder på en Boomer E2C. Förfrågan om examensarbetet kommer från Atlas Copco Rock Drills AB i Örebro som också tillverkar maskinen.Atlas Copco Rock Drills AB har idag ett fettsmörjningssystem som upprätthåller funktionerna på lederna. Uppgiften är att sammanfatta och utvärdera dagens system samt att finna nya lösningsförslag som skulle kunna ersätta eller delvis ersätta systemet. Information har hämtats från dokumentation, ritningar och samtal med konstruktörer på företaget. Efter att alla förutsättningarna för lederna specificerats så har lösningsförslag sökts.
It's a long way to the top (if you wanna rock n' roll) : Artisters väg till framgång och hållbarhet
The purpose of this essay is to analyze and clarify what?s behind the success of artistsin the music sector and what characterizes sustainable success for these. We arecurious about what lies behind the success of an artist and what makes an artist have asustainable career. The essay is based on a qualitative approach where six interviewshave been performed with people in various positions in the Swedish music industry. The interviewees have been selected after their knowledge and experience within thefield.
Koldioxidutsläpp vid vägbyggnad - en fallstudie med jämförelse av alternativa byggnadssätt
Abstract This degree project examines how much carbon dioxide that emits during the construction phase of a road project. This is to make it possible to compare how the amount of carbon dioxide differentiates between traditional road construction and Swepave construction, which is PEAB?s alternative way to design roads. To make the comparison a calculation tool has been produced. To compare the amount of carbon dioxide emissions a reference project was needed.
Dammsäkerhetsanalys via stabilitetsberäkningar för Långströmmens kraftverk : En jämförelse mellan olika dimensioneringsmetoder
A detailed dam safety evaluation (in Sweden called FDU) was performed in 2009 by WSP where stability control was performed for Långströmmen power plant with associated spillways. This evaluation concluded that stability could not be ensured, and risk of sliding occurred. The evaluation is based entirely on the recommendations outlined in RIDAS, the power companies guidelines for dam safety, and it is clear that extensive renovations are necessary to stabilize the dam.In this work, the stability will also be checked with guidance through new proposals on guidelines for concrete dams sliding stability, ELFORSK?s report 08:59. This report considered the guidelines in RIDAS as oversimplified, both from an international perspective, but also with regard to the current state of knowledge regarding dam safety.
Bland kranier, modeller och elektronmikroskop : Ett ordnings- och förteckningsarbete på Museum Gustavianum, föremålsmagasin Husbyborg, av handlingar rörande utgrävningen i Asine
This paper is an account of the inventory I've made of documents in the archive at Museum Gustavianum, Collections storage Husbyborg, relating to the excavations in Asine, Greece, in the 1920s. The aim of this inventory has been to establish which of the documents in the Husbyborg archives that belong to the department of Classical Studies at Uppsala University. Documents belonging to other archives have been found alongside the one mentioned above and those are the Original documentation (loan from Carolina) and the personal archive of Professor Axel W. Persson. The documents have been arranged according to the General Archive Scheme (Allmänna arkivschemat) seeing that the department of Classical Studies already had a series named Documents relating to the departments archeological collections, and the inventory I've made will be incorporated with that.
Styrd borrning eller konventionell schaktning : en jämförelse av två rörläggningsmetoder
This is a diploma thesis executed as a part of the examination of the educationalprogram Building engineer ? Construction management at Halmstad University. The aim of the thesis is to compare and evaluate conventional open-cut pipe-laying withhorizontal directional drilling. The thesis includes a comparison of the economic,environmental and time-based aspects of both methods and discusses which factorsthat determine the optimal choice of method.The study is mainly based on previous studies regarding the subject and oninterviews with professionals from the industry.A fictional project with five realistic cases of pipe-laying scenarios was compiled,sent to different companies for calculation, evaluated and compared. Our conclusionregarding when it?s suitable to use which method is entirely dependent on thespecific project.
Symbolisk dekoration : En studie av Järnspiralen som symbol under yngre järnålder.
When the Iron spirals investigated in this paper saw the light again no one looked at them as nothing more than decoration. It was first during the 2011 excavation in Old Uppsala that the symbolism of the items no longer could be ignored. The spirals of Old Uppsala lay along the walls of the great hall, which stood upon one of the human constructed plateaus in the area. The hall had been burned down and then cleared of all lumber. Then the iron spirals had been placed in the positions and then everything was sealed with a layer of clay.A study of the artifact began with the purpose to contextualize and interpret the iron spiral.
?Båtnitar? : Analys och konservering av järnnitar från Birkas garnison
The purpose of this paper is to analyse and discuss clinch-nails found at an excavation at terrace II in the Garrison of Birka, on the island of Björkö in Sweden. This type of clinch-nails is common in Viking age Sweden and is usually interpreted as coming from boats. The study will try to show that these types of nails could have been used in several kinds of wooden constructions. It will also show how the nails were made and what kinds of tools were used by the Viking smiths. The study has shown that this type of nails were used in several different types of wooden constructions such as boats, sleds, cart bodies, coffins, Birka's ramparts and buildings.
Kraftkabelförläggning i mark : - en studie av produktionsmetoder
The assignment given to us by NCC was to compose a degree project based on ground excavations for power cables. The aim of the study was to examine suitable excavation methods depending on different possible terrain conditions. The amount of previously written material within this subject is nearly non- existent and therefore there is a genuine interest by the NCC to receive a compilation of different production methods. The greater part of this study is based upon interviews with several companies active within this area of expertise. The technique of placing the electricity grid beneath ground for safety is today getting more and more common.
Är interpretation viktigt för alla?: En studie i hur musiklärare arbetar med interpretation i en populärmusik-ensemble
I denna studie undersöker vi tre musiklärares syn på interpretation i en pop/rock-orienterad ensemblemiljö. Studien genomfördes med hjälp av tre kvalitativa forskningsintervjuer där informanterna bestod av verksamma ensemblelärare i gymnasieskola samt högskola.Resultatet av studien visar att de intervjuade lärarna är eniga om att interpretation är viktigt, oavsett vilket instrument lärarna spelar eller vilken genrepraxis de följer. Däremot skiljer sig metoderna åt när lärarna interpreterar beroende på instrument och sammanhang. I resultatet reflekterar de intervjuade lärarna över vad interpretation innebär och beskriver olika tillvägagångssätt för att implementera detta i undervisningen..
Utveckling av ett flexibelt produkt- och processvalideringssystem: en fallstudie på Atlas Copco Rock Drills AB
Detta examensarbete syftar till att utforma ett förslag på ett produkt- och processvalideringssystem som skall kunna användas för att säkerställa kvaliteten på inköpta komponenter. Valideringssystemet är utformat för att användas av företag som arbetar med låga volymer, hög ändringsfrekvens och stor artikelflora. Utgångspunkten i utformningen har varit standarder och metoder som används inom fordonsindustrin: QS-9000, ISO/TS 16949, APQP och PPAP. Examensarbetet är genomfört på Atlas Copco Rock Drills AB (AC) och systemet har utformats och anpassats utefter de förutsättningar som råder där vad gäller volym, ändringsfrekvens och artikelflora. Ökad tillväxt och konsumtion världen över har medfört ett stigande behov av metall, vilket i sin tur har inneburit en växande efterfrågan på gruvutrustning.