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368 Uppsatser om Heavy metals - Sida 23 av 25

Fria Ventiler : Olika ventilstrategiers effekt på cylinderströmning, emissioner och prestanda i en heavy duty dieselmotor

En del fjällvandrare tycker att det är för tungt att gå med en stor ryggsäck, ett problem som har givit upphov till en idé om ett avlastande hjälpmedel. Företaget Prodelox AB har sedan tidigare påbörjat utvecklingen av detta hjälpmedel. Under detta examensarbete har ett koncept utvecklats med den initiala studien som utgångspunkt. Produktens grundidé är i dagsläget sekretessbelagd och kommer tyvärr inte att redovisas i denna rapport.En användarstudie genomfördes vilket resulterade i en kravspecifikation, produktens definition, samt en djupare bild av fjällvandring och andra friluftsaktiviteter. Denna djupa inblick möjliggjordes med hjälp av context mapping-metoden.

Oljetemperaturens inverkan på motoroljans degradering i lastbil

The market for heavy duty engines is constantly requiring engines that should be more andmore powerful, while still maintaining low fuel consumption. As a result of increasing enginepower, the engine and coolant temperature increases as well due to insufficient coolingperformance (because of design issues, cost etc.).Also, emission legislations, both current and future, require more and more measures to betaken by engine manufacturers. One way of meeting the legislations is the use of cooled EGR(Exhaust Gas Recirculation), which also lead to increased coolant temperatures.Both these factors also naturally lead to increased engine oil temperatures, the consequencesof which are not thoroughly investigated.This thesis project aims to investigate effects of high temperatures on engine oil degradation,with focus on the greatest degradation process: oxidation. To do this several engine runs havebeen performed on a 310 hp engine with EGR to see what happens to the engine oil in a realengine when exposed to high temperatures. During the tests oil samples have been taken andanalysed for important parameters.As a complement to these engine tests some laboratory oxidation testing have also beenperformed, to be able to compare engine test data with laboratory tests.One goal of the project was to try to formulate an empirical oxidation model, which would beable to predict oil oxidation levels in an engine, given any running parameters.

Fröplacering vid hög såhastighet - Väderstad Rapid jämfört med Amazone Cirrus

In today's agriculture efficiency and the capacity of tools and machinery are crucial. In this work we investigate whether it is possible to enhance the capacity of sowing by increasing the work speed of seeders, how seed technology affects seed placement, and if there is any difference between two different brands of seeders and their sow techniques. The seeders we have chosen to compare are Väderstad Rapid drill and Amazon Cirrus drill. The tillage capacity of the seeders and their traction power needs were examined as well.Väderstad Rapid and Amazon Cirrus were tested in a randomized block design with four replicates at three different speeds, 8 km/h, 12 km/h and 15 km/h. The seed placement at the different speeds was examined by dividing the seedbed into four different zones from its surface to its bottom.

Gender, labor and decision-making : the woman?s situation in family businesses in a Swedish agricultural setting

The inequality and separation of sexes seen in organizations may lead to inefficient use of human resources. Therefor, a more equal organization could lead to higher productivity and efficiency. Inequality within organizations is a problem also for the society as a whole since who is chosen for a position is not depended upon merits, leading to inefficiency. To not reflect upon traditional division of labor and decision-making could also lead to an undemocratic and unjust society. The aim of this thesis is to explore women and men?s engagement a family business in an agricultural setting. Gender theorists argue that gender arises from the social situation in society.

Ethanol for Scania's Future - A Scenario Based Analysis

Abstract Title: Ethanol for Scania?s future ? A scenario based analysis Authors: Anna Hansson and Julia Persson Tutors: Annette Cerne ? Department of Business Administration, Lund University Jonas Holmborn ? Head of Advanced Combustion, Engine Development, Scania Lennart Thörnqvist ? Department of Energy Sciences, Faculty of Engineering, Lund University Problem: Oil-based products are the dominating fuels in the transport sector but alternative fuels are currently challenging the world-wide dominance. The large number of alternative fuels that are under development at present makes the future fuel-market impossible to predict. Scania?s ethanol project is associated with a number of uncertainty factors that are beyond the company?s control.

Hörby kommun i förändring : utveckling för framtiden

We live in an exciting society, characterized by continuous changes and challenges. The effects of the globalization are widespread. The continuous flow of people, capital and goods follows in the wake of advances in communications, transport and information technology, resulting in a changed situation for different stakeholders in the society. This situation leads to increased cooperation and exchange, but also increased competition. The primary means of collecting empirical data for this study was interviews and a document study.

"Anders Andersson hade eld i sin tjärdal" : en analys av Jonas Åströms dagböcker 1868-1891

"Anders Andersson had a fire in his tar-kiln ". Analysis of Jonas Åström 's peasant-diary 1868-1891 Peasant diaries are notes written by farmers, crofters and other people connected with small-scale agriculture. The notes give unique information about diverse aspects of rural life, for example, personal relationships and work, travel and regularity of church attendance. One such diary was written by Jonas Åström who lived in the county of Västerbotten, Sweden. The main aim of this study is to describe the work done by farmers in the 19th century, focusing on their use of forest resources, as recorded in his diary.

Riktlinjer för utformning av manualbilder till Volvo Construction Equipment : En studie av riktlinjer kring utformning av processuella instruktionsbilder

At Volvo Construction Equipment outside Eskilstuna a wide range of heavy equipment machines are developed that are used by a variety of industries worldwide. For the handling and maintenance of these machines a deep knowledge is often required. Volvo CE and their dealer Swecon offer courses for both drivers and technicians that last for 1-2 weeks. Out on the workplaces however, the knowledge from these courses need to be supplemented with information from the machine?s operator and repair manuals.

Infektiösa ledproblem i ekologisk och konventionell grisproduktion

We live in an exciting society, characterized by continuous changes and challenges. The effects of the globalization are widespread. The continuous flow of people, capital and goods follows in the wake of advances in communications, transport and information technology, resulting in a changed situation for different stakeholders in the society. This situation leads to increased cooperation and exchange, but also increased competition. The primary means of collecting empirical data for this study was interviews and a document study.

Nursing technique and growth environment of Rabbit fish (Siganus guttatus) in the area of Tam Giang lagoon, Thua Thien Hue

SummaryIn the area to the east of Hue city, in Vietnam, lays Tam Giang lagoon, one of Asia's largest lagoons, with an area of 22,000 hectares. This lagoon is suitable for aquaculture. One reason for this is because the salinity differs from sweet to salty in different parts of the lagoon. The Vietnamese Government advocates an increase in environmentally-friendly aquaculture and the fish Siganus guttatus (Rabbit fish) is a candidate for this. This fish eats mainly algae and can be cultivated in a polyculture.

Vindskador vid stickväg i 1:a och 2:a gallring i Boxholm, Östergötland : i stormen Pers fotspår

Wind damages next to strip roads in 1st and 2nd thinning in Boxholm, Östergötland Anneli Fransson, SLU, inst f sydsvensk skogsvetenskap, Examensarbete no 108 Wind damage is something we are all familiar with since the storms Gudrun (2005) and Per (2007). Research about strip roads and wind damage is very limited. It is commonly known that the trees next to the strip roads more often fall whit heavy winds, and the purpose of this thesis was to verify this statement. Data was collected from first- and second thinnings at Boxholms Skogar AB, Östergötland. In first thinnings data was collected from both spruce and pine stands and second thinnings only data from spruce stands was collected.

Upplysning, rollspel eller lagstiftning? ANT-undervisningens utveckling 1962-1994

The use of alcohol, narcotics, and tobacco have all long been considered health hazards, especially among children and teenagers. It is therefor not surprising to find that schools have promoted against the use of these substances in different preventative programs for many decades, and the Swedish school system is no exception. However, the use of, as well as the laws restricting alcohol, narcotics, and tobacco are, and have historically been, highly political issues. Individuals, groups, institutions, and states may all have different opinions on how these substances should be regulated and of their place in society, which in turn may lead to conflicts of values and different approaches. One can not expect parents or guardians to share the views on alcohol, narcotics, and tobacco policy presented by schools, laws or state regulations.

Hur de viktigaste faktorerna påverkar värdeskapande för marknadsintelligensprocesser åt företag i Kina

China is a unique market that differs from the Western market in many ways. Companies are not required to publicize financial reports, and furthermore a heavy focus on business relationship building can make it hard for companies to have high quality streams of data to get insights about their markets. For a consultant company to successfully enter the Chinese market and helping producing and technological global firms improving their insights on the Chinese market, the consultant company needs to understand which the important factors are and how those factors can help in creating value for their potential customers. To help the analyzing and consultant firm called Kairos Future, a qualitative case study was conducted on 16 different global companies with focus on industrial production. The case study was mainly conducted through face to face interviews with decision makers who had a broad understanding of their respective companies.

Liquid diesel biofuel production in Sweden : a study of producers using forestry- or agricultural sector feedstock

The transportation sector is the only sector of the Swedish society that is still increasing the emissions of carbon dioxide and other green house gases. Diesel fuel represents one of the fuels that contributes to these emissions and the use of diesel fuels is increasing every year. The main purpose of this study was to make an estimation of the current business situation for producers of liquid diesel biofuels in Sweden such as biodiesel, synthetic diesel and crude tall diesel and examine the forces of competition of the industry today and its future prospects. The study revealed that the rivalry among the existing firms was low mainly due to the geographical spread of the companies. Moreover the success of the biodiesel industry was influenced by a long-term guarantee of the tax exempt for biofuels and by the price level of petroleum diesel.

Att finna den positiva avvikelsen : En fallstudie av en väl fungerande arbetsplats

AbstractDuring recent years the climate in recruiting new personnel has hardened as a result of high levels of employment and increasing competition in labour market. In order to resolve this problem, organisations have to adapt new strategies to attract and meet the demands of potential employees who have the required competence to meet job requirements.The aim of this study has been to examine a well functioning work place in order to elucidate explicit examples of what employees consider positive, and what can be ascertained as positive deviations. Narratives emanating from the unit manager and personnel illustrate their views on the positive influences found in their working place. Another ambition is to increase awareness and understanding about the factors that promote satisfaction in the workplace and positive deviation; and to utilise this knowledge.Traditional research on organisations has frequently focused on problems. The theoretical point of departure of this study is based on Positive Organizational Scholarship, abbreviated as POS.

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