Med gallringseffekt menas att träden efter en gallring ökar sin diametertillväxt. Denna effekt har traditionellt tillskrivits den minskade konkurrensen om ljus och näringsämnen mellan träden. En alternativ förklaring till gallringeffekten är att vindpåverkan per träd blir högre i det gallrade beståndet, vilket leder till större svajningar för träden och därmed en ökad diametertillväxt. I studien undersöktes ifall vindens påverkan är en del av gallringseffekten på tall (Pinus sylvestris L). Lokalen för studien var SLU:s försökspark i Siljansfors utanför Mora. Omgivande tätheter av stamantal, grundyta, kronvolym och kronmantelyta beräknades på flera avstånd från varje individuellt träd.

This study was an assignment for the company Holmen which is located in the region of Örnsköldsvik, Sweden. The study was focusing on the responsibilities of a forestry planner during the planning season. The study was investigating about how much time the planner spent in the office, in the car and out in the forest. Any other issues that would cause delays were also identified. To be more effective and to increase the number of objects to a district bank, a better preparation in the planning stage (for thinning?s or clear cuts) is needed as well as faster transition on to the next area.

The aim of this study was to quantify the productivity and the costs of different harvesting systems (teams), containing harvesters equipped with accumulating harvester heads and forwarders, in first commercial thinnings were an integrated harvest of pulpwood and energy wood were performed. In the beginning the plan was to study and measure 20 sites before and after harvest. Due to storms during the summer of 2010, complete data could only be obtained from 8 of these 20 sites. Seven of these sites were privately owned and one was owned by UPM, all of the sites had been pre-commercially thinned. The mean stem density before harvest was 2578 stems per ha and the mean stem volume was 0.074 m3solid over bark.On average 1518 stems/ha was harvested.

There is desire to evaluate the tracheal diameter in the Swedish population of English Bulldog, a breed with breathing disorders, and if possible use it as a criteria for breeding in the hope of improving the life situation for these dogs. The Swedish Kennel Club has together with the Swedish Club for English Bulldog and veterinarians presented a five year radiological study that has the purpose to give an average look on how the tracheal situation is in the population. The trachea will be evaluated through two different methods, both measuring two distances in the thorax. The first one compares the tracheal diameter to the height of the cranial opening of the thorax, and the second one to the width of the third rib. With the measured distances one will calculate a quotient and compares it to the reference values.This study is designed to get a preliminary evaluation, based on the 65 dogs that were available on the time for the study, with measurements done by two persons on three different occasions each.

Tidigare forskning visar att individer med en diagnos inomautismspektrumet (ASD) upplever en större sinneskänslighet vad gällerhörsel, syn och känsel men få studier har undersökt lukt känsligheten. Syftetmed föreliggande studie är att få en djupare förståelse för luktfunktioner hosvuxna med ASD.16 deltagare med ASD (14 kontroller) testades iluktkänslighet, fri- och stödd luktidentifiering. Samtliga deltagaresjälvskattade även den upplevda luktkänslighet samt genomgick ettscreeningtest för autism, The adult spectrum quotient, AQ. Lukt känslighet,fri och stödd luktidentifikation skiljde sig inte åt mellan de båda gruppernaSjälvskattning av luktfunktioner korrelerade signifikant positivt med AQpoäng vilket visar att personer med högre grad av ASD också upplevde sigsom mer luktkänsliga. Föreliggande resultat påvisade att personer medhögre AQ-poäng upplevde att de hade en känsligare luktfunktion.

Trots vetskap om att den kliniska bilden vid autismspektrumtillstånd (AST) förändras med åldern råder det brist på diagnostiska instrument som är specifikt designade för vuxna. Ritvo Autism and Asperger Diagnostic Scale (RAADS) är en självskattningsskala utvecklad för detta syfte. Den svenska versionen av RAADS utvärderades i föreliggande studie med avseende på intern konsistens, diagnostisk validitet och samtidig validitet. Undersökningsgruppen bestod av 75 individer med högfungerande AST samt 200 kontroller utan AST. Därtill utfördes en preliminär analys av resultatens stabilitet över tid.

Ditch cleaning is increasingly important in Swedish forestry. This study compare different concepts concerning machinery, namely two general-purpose excavators of different sizes, 8 tonnes and 15 tonnes, versus a dedicated machine constructed solely to deal with ditch-cleaning. The machines were tested on rough as well as on gentle terrain and on open terrain as well as in young stands in connection with thinning. The conclusions were that the excavators are more versatile and have greater capacity than the dedicated machine, while the latter excels in quality of work. Interestingly, there was no significant difference in performance between the both excavators..

To guarantee the customers a job satisfactory executed Sydved has been certified by the ISO 14001 standard. One part of the certification is the standards of soil damages. The soil damages were over represented during 1999 and 2000. It was therefore a need to study the problem in order to see what could be done to reduces these damages. A filed study was carried out on 21 subjectively selected stands from the following five districts: Vänersborg, Falköping, Borås, Jönköping and Åseda. As the study is a descriptive study of the soil damages, their character and extension, only stands were tracks were reported were considered.

Resultat från 3 olika bestånd i Västra Götaland. Åldern på bestånden är 30, 50 och 50 år. Varje provyta var 100 m2. Bestånden har vuxit utan gallring och gödsling och skötts enligt en metod som kallas Hyssnametoden. Syftet med studien var att beskriva, följa upp och utvärdera effekterna av en alternativ skogsskötselmetod.

Tidigare forskning visar att individer med en diagnos inomautismspektrumet (ASD) upplever en större sinneskänslighet vad gällerhörsel, syn och känsel men få studier har undersökt lukt känsligheten. Syftetmed föreliggande studie är att få en djupare förståelse för luktfunktioner hosvuxna med ASD.16 deltagare med ASD (14 kontroller) testades iluktkänslighet, fri- och stödd luktidentifiering. Samtliga deltagaresjälvskattade även den upplevda luktkänslighet samt genomgick ettscreeningtest för autism, The adult spectrum quotient, AQ. Lukt känslighet,fri och stödd luktidentifikation skiljde sig inte åt mellan de båda gruppernaSjälvskattning av luktfunktioner korrelerade signifikant positivt med AQpoäng vilket visar att personer med högre grad av ASD också upplevde sigsom mer luktkänsliga. Föreliggande resultat påvisade att personer medhögre AQ-poäng upplevde att de hade en känsligare luktfunktion.

Att attrahera kompetent personal a?r mycket avgo?rande fo?r att fo?retag ska prestera va?l i framtiden, och fo?r att lyckas med detta a?r det viktigt att fo?retag har ett bra anseende. Anseende a?r dock en komplex tillga?ng och besta?r av flera dimensioner. Syftet med denna uppsats a?r att ta reda pa? vilka dimensioner av anseende som a?r viktigast fo?r att attrahera kompetent personal.

Generally, the economic health of Swedish roundwood truck transport companies has not been good. Profitability is important for maintaining the stability in the transport business, which is a condition for long-term transport planning in the forestry sector. The scope of this study was to identify probable factors influencing the profitability of roundwood truck transport companies and quantify the influence of these factors on economic results. The study was carried out at a major roundwood truck transport organisation in mid-Sweden and was implemented in four steps. In the first step economic results from the haulage contractors were collected and a random sample was taken from accounted net margin for the account year 2005/2006. In the second step hauliers were interviewed to identify probable success factors. At the third step data for identified factors were gathered through a questionnaire.

The purpose of this study is to investigate whether it is possible for SCA to update their stand register with use of digital aerial photos photographed with a Zeiss/Intergraph DMC. ?Updating? in this study implies the delineation of stands and estimating stand variables such as average stand height, volume density, stand volume, and tree species composition in order to identify stands which can be of current interest for thinning. The study also includes how the aerial photo material and experience of the interpreter can influence the quality of the interpreted variables. The aerial photo interpretations were made by both experienced and inexperienced interpreters.

The purpose of this report was to investigate if there are any correlation between spruce medium height in young spruce stands and the number of birch stump shoots. The purpose was also to investigate if there are any correlation between the spruce height growth after clearing and the mean height of birch stump shoots. The reason for this investigation is that the problem with birch stump shoots after clearing can be expensive if there must be additional clearings before the first thinning. The study provides no apparent association and therefore no special clearance height is recommended. In the final stages of the work there are given some comments on the study´s weaknesses. Finally topics for further research are suggested..

The main purpose of this study is to investigate how to reduce the high, and every decade raising, pre-clearance cost. The pre-clearance is today carried out with a brush saw and paid per labour hour. All small trees not suitable for pulpwood are removed to simplify the later work of the harvester. The study compares the economic results from thinning of four parcels each treated differently regarding harsh or light pre-clearance and extraction of only pulpwood, or both pulpwood and fuel wood. In this type of spruce stand the study indicates that a lighter pre-clearance, followed up with both pulpwood and a fuel wood extraction, has a much better economy than the traditional method of hard pre-clearance and only pulpwood extraction..