| 1. |
- Cedergren, Stefan, et al.
(författare)
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Towards Integrating Perceived Customer Value in the Evaluation of Performance in Product Development
- 2010. - 7
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Ingår i: PICMET 2010. - : IEEE. - 9781890843229
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Konferensbidrag (refereegranskat)abstract
- Product delivering companies invest resources in product development activities in order to create value. Still, when performance in product development is to be evaluated, time, cost, and quality are in focus, especially in the later stages of the development when it is expensive and difficult to make any changes. Time, cost, and quality are important dimensions of performance but they are not revealing the complete picture. Missing is the value perspective. This paper outlines a method for how perceived customer value can be used to evaluate performance in product development and describes how it is verified through a case study. By using the perceived customer value of requirements, the value propagation throughout the development is possible to monitor based on both market and scope changes. In addition, a measure of productivity can be calculated by relating the perceived value to the spent effort. This information is used in order to visualize the value propagation and performance during the development. Hence, through this method it is possible to evaluate the productivity of activities from initial ideas to a final product. The paper is concluded with a discussion of managerial implications and how this method contributes to theory.
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| 2. |
- Koppejan, Japp, et al.
(författare)
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Health and safety Aspects of Solid Biomass Storage, Transportation and Feeding
- 2013
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This publication focuses on the health and safety issues of the supply chain of solid biofuels with the objective to highlight commonly used mitigation methodologies to promote a better working environment when dealing with solid biofuels. It has been compiled as a joint effort by experts active in Tasks 32, 36, 37 and 40 of the IEA Bioenergy Agreement, with their own specific fields of expertise. Only through this cooperation, it was possible to touch upon the full range of issues in one publication that one may come across when developing projects in which solid biomass fuels are produced, traded or used. The properties of a biomass material and the intended use determine how the material should be safely transported and stored. Self-heating, off-gassing and dust explosions are significant challenges for the industry that have already resulted in significant losses of capital investments and even tragic loss of life. Likewise, exposure to biologically active material, such as moulds and spores may form a serious hazard for the health of workers involved. With the growth of the bioenergy sector, it is important not only that opportunities for bioenergy are implemented in an efficient economic manner, but also safely.
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| 3. |
- Larm, Peter, et al.
(författare)
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Multiple adverse outcomes over 30 years following adolescent substance misuse treatment
- 2009
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Ingår i: Acta Psychiatrica Scandinavica. - : Wiley. - 0001-690X .- 1600-0447. ; 119:6, s. 484-493
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To compare outcomes over 30 years experienced by individuals who as adolescents entered substance misuse treatment and a general population sample. Method: All 1992 individuals seen at the only clinic for substance misusing adolescents in Stockholm from 1968 to 1971 were compared to 1992 individuals randomly selected from the Swedish population, matched for sex, age and birthplace. Death, hospitalization for physical illness related to substance misuse, hospitalization for mental illness, substance misuse, criminal convictions and poverty were documented from national registers. Results: Relative risks of death, physical illness, mental illness, substance misuse, criminal convictions and poverty were significantly elevated in the clinic compared to the general population sample. After adjustment for substance misuse in adulthood, the risks of death, physical and mental illness, criminality and poverty remained elevated. Conclusion: Adolescents who consult for substance misuse problems are at high risk for multiple adverse outcomes over the subsequent 30 years.
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| 4. |
- Larm, Peter, et al.
(författare)
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Trajectories of resilience over 25 years of individuals who as adolescents consulted for substance misuse and a matched comparison group
- 2010
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Ingår i: Addiction. - : Wiley. - 0965-2140 .- 1360-0443. ; 105:7, s. 1216-1225
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Tidskriftsartikel (refereegranskat)abstract
- Aims: To examine trajectories of resilience over 25 years among individuals who as adolescents received treatment for substance misuse, the clinical sample (CS) and a matched general population sample (GP). Design: Comparison of the CS and GP over 25 years using Swedish national registers of health care and criminality. Setting: A substance misuse clinic for adolescents in an urban area in Sweden. Measurements: Resilience was defined as the absence of substance misuse, hospitalizations for physical illnesses related to substance misuse, hospitalization for mental illness and law-abiding behaviour from ages 21 to 45 years. Participants: The CS included 701 individuals who as adolescents had consulted a clinic for substance misuse. The GP included 731 individuals selected randomly from the Swedish population and matched for age, sex and birthplace. Findings: A total of 52.4% of the GP and 24.4% of the CS achieved resilience in all domains through 25 years. Among the CS, another one-third initially displayed moderate levels of resilience that rose to high levels over time, one-quarter displayed decreasing levels of resilience over time, while 9.3% showed little but improving resilience and 8.8% showed no resilience. Levels of resilience were associated with the severity of substance misuse and delinquency in adolescence. Conclusions: Individuals who had presented substance misuse problems in adolescence were less likely to achieve resilience over the subsequent 25 years than was a matched general population sample, and among them, four distinct trajectories of resilience were identified. The severity and type of problems presented in adolescence distinguished the four trajectories.
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| 5. |
- Larsson, Ida, et al.
(författare)
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Assessment of the Self-heating Potential of Wood Pellets
- 2012
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The use of biomass pellets is increasing. As a consequence, large indoor storage facilities are needed along the transportation chain. The increased production volumes, transportation, handling and storage of pellets result in increased risks. A number of fire incidents due to spontaneous ignition in wood pellets have been reported. Increased efforts concerning safety and quality assurance are, therefore, important. The aim of the present work is to provide methods for estimating risks for self-heating from pellets stored in bulk quantities. The experimental work ranges from small-scale characterizations to medium-scale storage tests and includes several different types of pellets. One aim has been to develop small scale screening methods to assess the propensity for self-heating, thereby trying to define the specific type of “activity” occurring in the pellets as well as characterising it. Isothermal calorimetry (micro calorimeter) has been used as small scale screening test method and the results has then been validated with crossing point tests and in medium scale tests (1 m3). Thirteen samples from different types of pellets have been ranked relative to each other in micro calorimeter tests and two pellet types; one “reactive” and one “less reactive” were also tested for validation in crossing point and medium scale. The results clearly reveal that different activity levels of the pellets can be measured using small scale screening methods.
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| 6. |
- Larsson, Ida, et al.
(författare)
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Medium-scale reference tests and calculations of spontaneous ignition in wood pellets - the LUBA project
- 2012
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The use of biomass pellets is increasing. As a consequence, large indoor storage facilities are needed along the transportation chain. The increased production volumes, transportation, handling and storage of pellets result in increased risks. A number of fire incidents due to spontaneous ignition in wood pellets have been reported. Increased efforts concerning safety and quality assurance are, therefore, important. The aim of present work is to provide methods for estimating risks for self-heating from pellets stored in bulk quantities. This report compares medium scale tests of pellets in bulk with smaller screening test; micro calorimeter and crossing point. Two types of pellets; one “reactive” and one “less reactive” were compared. Kinetic parameters from the crossing point and micro calorimeter tests was used as input data for Frank-Kamenetskii calculations and compared with the medium scale test results. Calculations of the critical ambient temperature and time to self-ignition have also been preformed on four different types of representative types of full scale storages that either exist today or might be possible in the future. The results clearly reveal that results in medium scale can be predicted by using results from small scale screening methods like isothermal calorimetry or crossing point. The small scale test methods show the same indications as medium scale when comparing reactive and less active pellet types. The medium-scale tests were effective in separating the self-heating activity of the two types of pellets investigated.
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| 7. |
- Larsson, Ida, et al.
(författare)
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Small scale screening tests to assess the self-heating potential of wood pellets
- 2013
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Ingår i: Interflam 2013. - London, UK : Interscience Communications. ; , s. 623-628
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The use of biomass pellets is increasing. As a consequence, large indoor storage facilities are needed along the transportation chain. A number of fire incidents due to spontaneous ignition in wood pellets have been reported. The aim of the present work is to provide methods for estimating risks for self-heating from pellets stored in bulk quantities. The experimental work ranges from small-scale characterizations to medium-scale storage tests and includes different types of pellets. One aim has been to develop small scale screening methods to assess the propensity for self-heating, thereby trying to define the specific type of “activity” occurring in the pellets as well as characterising it. Isothermal calorimetry (micro calorimeter) has been used as small scale screening test method and the results has then been validated with crossing point tests and in medium scale tests (1 m3). Thirteen samples from different types of pellets have been ranked relative to each other in micro calorimeter tests and two pellet types; one “reactive” and one “less reactive” were also tested for validation in crossing point and medium scale. The results clearly reveal that different activity levels of the pellets can be measured using small scale screening methods.
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| 8. |
- Larsson, Ida, et al.
(författare)
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Temperature Measurements and Examination of Self-heating in Large Scale storage of Wood Pellets
- 2014
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Ingår i: World Bioenergy 2014. - Jönköping, Sweden.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper summarizes the experimental data from a large-scale storage test performed within the European project called SafePellets. Temperature measurements were made inside a silo with a capacity of storing 3000 ton of wood pellets, from August to October in 2013. The purpose of the test was to examine the self-heating of the wood pellets, where and when it occurs, how it spreads and if it could be connected to certain events. For temperature measurements, both the temperature cables belonging to the silo temperature surveillance system and thermocouples mounted by SP at the cables and on the in/out-side walls of the silo were used. The results clearly reveal that self-heating occurs almost instantly after start of filling the silo and temperatures above 40 °C inside the pellets bulk is regular. The temperature surveillance system, which was set to give an alarm signal for high temperatures, was activated several times during the test period and temperatures exceeding 60 °C were registered at several occasions. Measurements above the pellet surface also show that this headspace temperature varies much with the outside ambient temperature and the sunlight radiation. A sunny summer’s day, the headspace temperature could easily reach above 40 °C, which will influence the pellet bulk. The project also emphasized an important problem when it comes to silo storage. The problem of temperature sensor cables inside the silo not always hanging where they are supposed to be was observed in the test and dealt with.
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| 9. |
- Larsson, Magnus, et al.
(författare)
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Technology Transfer: Why some Succeed and some don't
- 2006
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Ingår i: Proceedings - International Conference on Software Engineering, 2006. - New York, NY, USA : ACM. - 159593412X ; , s. 23-27
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Konferensbidrag (refereegranskat)abstract
- In this paper we present several technology transfer cases both successes and failures. These cases describe transfers from research department within a large corporation to a product company, university to a large product company and university to a small product company. Based on the analysis of these cases we outline several strategies that can be used, in isolation or combined, in order to increase the probability for success
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| 10. |
- Larsson, Stig, et al.
(författare)
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Assessing the Influence on Processes when Evolving the Software Architecture
- 2007
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Ingår i: 9th International Workshop on Principles of Software Evolution, IWPSE 2007, Held in Conjunction with the 6th ESEC/FSE Joint Meeting. - New York, NY, USA : ACM. - 9781595937223 ; , s. 59-66
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Software intensive products and systems evolve over the life-cycle. Changing business objectives may drive architectural or process changes. Altering either architecture or process mightinfluence the other. Also the organization may influence and be influenced. This paper describes these relationships and proposes a method for assessing the influence on process that a proposed architectural change can have. The method includes the use of scenarios and process reference models. A case study where the method has been used is described, identifying the need for changes in the processes to be able to utilize the advantages made possible due to the architectural evolution. The case study supports our proposal that a structured method to assess the impacts on process when changing the architecture of a system helps to reduce risks and to facilitate the envisioned business benefits. This also identifies the need to devise methods for other types of changes, e.g. how a process change may influence architecture or organization.
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