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1429 Uppsatser om Natural ventilation - Sida 28 av 96

Skötselmetoder för bestånd med produktions- och naturvårdsmål :

This study is made on assignment by the local board of forestry in Skåne, Blekinge and Halland. The change of the forest law 1994 brought a new type of management plan. A more active planning was introduced in order to equate the environment goal with the production goal. The purpose with this study is to give a better picture of how planning for nature conservation in production forest is made and to develop support for selection of silviculture methods for stands with combined goals. With combined goals means production forestry with a reinforced consideration to both nature and culture, called PF-classified stands. This was done by: ? Describing silviculture models from the literature that are possible to use for stands with combined goals. ? Describing silviculture models that is used in practice in stands with combined goals. ? Describing how the classification of stands with combined goals is used. Which means, were in the terrain, with which frequency and in which type of forest PF-classification is used. ? Comparing differences and similarities of theoretical and practical used models. The study was done partly as a literature study and partly as an interview study of forest planners.

Energisystemanalys av ABB AB LV Motors

With a larger awareness of the climate changes and increasing electricity prices, energy efficiency measures in the industry have become more common. By rationalize the activity and by the same time decrease the emission of greenhouse gases the company can both save money and reduce negative environmental impact. For the Swedish industries the electricity price have traditional been relative low, which has resulted in a considerable larger usage than other European countries. By a deregulation of the European electricity market the electricity price will level off between the countries, which will cause a higher electricity price in Sweden than we are use to. To prevent that the Swedish industry don?t lose competitiveness against the other European countries, it will require energy efficiency activities in all different forms.ABB Sweden has decided to decrease their total energy usage with five percent in two years.

Ventilering av koldioxid ur kardiotomi-reservoar

Vid hja?rtoperationer leder man bort blodet fra?n hja?rtat och kopplar upp patienten till en hja?rt-lungmaskin med tillho?rande beha?llare (kardiotomi-reservoar). I det o?ppna sa?ret tillfo?rs koldioxid kontinuerligt. Detta go?rs fo?r att avlufta sa?rha?lan och hindra luft fra?n att komma in i hja?rtat och de stora ka?rlen under kirurgi.

?Varför är jag här? Varför sitter jag med de här gubbarna?? : En kvalitativ studie om att vara kvinna i den mansdominerade byggbranschen

This study aims to look at female executives? view of their leadership in the male-dominated construction industry. The study is  qualitative and focuses on the respondents' subjective perceptions. We have conducted six interviews with women in different companies whose positions within each company varied. Using theories of subjectivity, emotions, impression management and organizational structures, to support the analysis conducted, this study shows that there are obstacles for women in the industry, but it also shows that it  seems to be facing a brighter future.

Energieffektiviserande åtgärderpå Robertsfors VA-nät : En förstudie av vilka energieffektiviserande åtgärdersom kan göras på pumpstationer och reningsverk

The objective of this work was to introduce measures to reduce energy and water demand at Gävle Söder 17:10. To succeed, this energy audit has been made. The work is based on collected statistics from the property owner Norrporten, measurements, literature review and through consultation with experts in the field. Two models, one for each building, have been created in the simulation program BV2 to estimate the potential of energy measures based on the collected information. The models in BV2 have been verified against the statistics of the energy consumption.With the help of calculations and simulations, seven cost-effective measures have been identified.

Förstudie av motströms koaxialvärmeväxlare till Huddinge sjukhus

Centralsystemen för ventilation behöver inom de närmaste tio åren bytas ut i Huddinge sjukhus. Energiförbrukningen i ventilationssystemet förväntas kunna reduceras markant med hjälp av nya, effektiva system för värmeåtervinning och komfortkyla. Just nu pågår en process där flertalet lösningsförslag tagits fram och behöver utredas.I denna rapport presenteras en undersökning av en motströms koaxialvärmeväxlare för värmeåtervinning och ett kylsystem baserat på indirekt evaporativ kylning. Systemen har behandlats separat och utvärderats utifrån numeriska simuleringar i EES, Excel och MATLAB där beräkningarna för värmeväxlaren gjorts enligt NTU-metoden.För att uppnå effektivitetskraven visar sig den koaxiala värmeväxlaren blir orimligt stor samtidigt som tryckfallen i värmeväxlarens kanaler ger upphov till oacceptabla driftkostnader. Värmeväxlarlösningen är därför inte ett hållbart alternativ, varför en LCC-analys inte är inkluderad i denna rapport.Kylsystemet visar sig dessbättre vara mer intressant och skulle kunna kombineras med en annan typ av värmeväxlare för att sänka temperaturen vid varma sommardagar.

Threats and opportunities for the survival of the Yangtze finless porpoise

The Yangtze finless porpoise (Neophocaena phocaenoides asiaorientalis), is a small freshwater cetacean which has recently fallen dramatically in number. It is an endemic species for the Yangtze River and unless drastic action is taken, it risks the same fate as the now functionally extinct Yangtze river dolphin (Lipotes vexillifer). Threats to the porpoise are diverse but they have in common that they are caused by man. Development of the river has been made to supply a growing human population with food, hydropower, and to reduce the risk of flooding. These changes have resulted in a degraded habitat for the porpoise.

Hur påverkar naturvårdsåtgärder mängden av vedlevande insekter : Manuellt dödade träd vs självdöda

Today?s forest managers implement a large number of methods to increase the amount of dead wood in Swedish forests. They use everything from high cutting of trees to girdling trees and burning forests. However, implementation of these measures without proper knowledge of their consequences is a common problem. This study has been performed to increase knowledge about two of these measures, girdling and high cutting, and how these actions affect the number of wood-living insects living on dead trees.

Intuberade intensivvårdspatienters upplevelser av kommunikation under respiratorbehandling

Muntlig kommunikation kan vara begränsad eller omöjlig när patienten är intuberad vid respiratorbehandling. Intuberingen hindrar talet och detta kan vara frustrerande för många patienter. Syftet med studien var att belysa hur intuberade intensivvårdspatienter upplever kommunikation. För att genomföra studien valdes systematisk litteraturstudie som metod. Resultatet baseras på 11 artiklar.

Naturreservat : en bra naturvårdsåtgärd för att bevara enskilda arter och/eller bevara den biologiska mångfalden?

The examination of the adequate nature conservation methods in a natural reserve, to conserve a specific species and / or increase biological diversity is the subject of this study. This work is based on four species, that can be found during the Spring season, liverleaf, wood anemone, brimstone and woodpecker. The incidence and availability is studied and closely observed for these species in twenty forests, i.e. ten forests which are nature reserves and ten forests with the similar characteristics as the nature reserves habitat, but are not nature reserves in Gnesta mucipality, Södermanland. Measurements of the tree crown and the diameter of the tree trunks where noted to study how these factors could affect the outcome of the abundance and incidence of the four species.

Fuktproblem i sydöstra Asien

The author has, with the help of AK Consultancy Indoor Air AB, formed a series of questions regarding moisture problems in buildings and how these are handled in extreme climates with high temperatures and a high relative humidity. Furthermore to analyse and indentify key material that makes a construction safe against moisture problems. Ventilation, AC and the choice of materials have in a later stage of the thesis been investigated to enhance the knowledge of moisture protection. The research for this report includes measurements on existing buildings, calculation models on the building envelope for analyses and the ingoing materials of the envelope. The health aspect of moisture problems related to ?sick building syndrome? has been included and interviews have been conducted to gather relevant information.A study of the American system, ASHRAE, American Society of Heating, Refrigeration and Air Conditioning Engineers and the standards used in Singapore has been made to highlight the difference.

Utbilda och forska är vi bra på - men att samverka? : En kritisk studie av Högskolan i Gävle och den tredje uppgiften

The cooperation between university and industry life in the region of Gävle is always a topic of importance. University and High schools have various roles to fulfill: except administrating the training and supporting research they should also - as a third role - contribute to cooperation between organizations, business companies and other associations. In addition to that, they should support individuals by local as well as regional development. The purpose of our paper is to make a critical review of the cooperation between the University of Gävle (HiG) and industry life until today and the consequences in order to encourage students to stay in the Gävle region during and after their period of studies.Initial we started with a preliminary inquiry with a questionnaire as a base for students in three programs at the Department of Economy; the program for Bachelor of Science, the program for estate agent and another economy program with direction estate economy. From this preliminary inquiry we got the picture of the way the students looked at the problem.

Hörapparatnyttan hos dem som ordinerats hörapparat med öppen anpassning ? En utvärdering

An open fitting is suitable for persons with sloping hearing loss and relatively good low fre-quency hearing. Sensory neural hearing losses often have this type of configuration. A large ventilation canal gives a greater feeling of comfort and less occlusion. The purpose of this study was to look at the hearing aid benefit of open fitted hearing aids. Self report question-naires were sent out to 102 patients who were given ReSound AIR during the year of 2006 in Uddevalla.

The Expedition in Pursuit of Rare Meats

The purpose of this paper is to bring a British mural painting that originated in England in the 1920?s into the limelight and introduce it to the Swedish public. The mural was commissioned by Tate Gallery, currently known as Tate Britain. The work of art was designed for a semi-public space as a decoration in the Refreshment Room of the gallery, located in the basement where there was little natural light. The artist, a young British man named Rex Whistler, was transformed from being a student at an art school into a celebrated professional artist by this piece of art.

Analys av felkällor vid energisimuleringar : En jämförelse mellan IDA ICE och CFD

I detta arbete har energisimuleringsprogrammet IDA ICE utvärderats genom att simuleringar gjorda i detta program jämförts med simuleringar gjorda i CFD-programmet ANSYS Fluent. Modeller i form av ett kvadratiskt kontorsrum med fönster ställdes upp för ett basfall i de båda programmen och parametern operativ temperatur jämfördes. För att se hur förändringar i modellerna påverkade resultatet ställdes ett antal nya fall upp där olika parametrar varierades. Variablerna som en i taget ändrades vid uppställningar av nya simuleringsfall var: rumshöjd, U-värde på fönstret, deplacerande istället för omblandande ventilation, radiator istället för golvvärme, tilluftstemperatur, mätpunktens placering samt hur till-och frånluftsdonen placerades. Resultatet av simuleringarna visade att den operativa temperaturen höll sig på en relativt konstant nivå för de olika fallen i IDA ICE, medan värdet på denna parameter varierade för de olika fallen vid CFD-simuleringarna.

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