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- Jakobsson, Mats, et al.
(författare)
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'Att blifva sin egen' : ungdomars väg in i vuxenlivet i 1700- och 1800-talens övre Norrland
- 2000
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Ingår i: Sociologisk forskning. - Umeå : Umeå universitet. ; 37:3-4, s. 134-141
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The background to this study is that there is no studies on youth and their transition to adulthood in preindustrial Sweden. The main objective of this thesis has therefore been to analyze young peoples transition to adulthood during the late 18th and 19th centuries in a region of the northern part of Sweden. The social context of the region was mainly agrarian during the investigated period despite the fact that in the later part of the 19th and beginning of 20th century, a development of a growing forest industry had started. The main questions is: How and when in life did different social categories of young people establish an independent and adult life? Where there any changes in transitional patterns and was the establishment smoother or more troublesome at different times during the investigated period ? Where there any changes regarding social norms related to the establishment of adult life?The transition to adult life is studied from a life-course approach and four key-transitions; The First Holy communion, leaving home, marriage and parenthood are regarded as significant steps within the process to a independent social position. Individual data related to keytransitions is mainly collected from cathectical examination records and comprised 2206 individuals born in six different cohorts between 1770 and 1900. The selected cohorts represents individuals that had to deal with different social conditions during their youth and transition to adult life.The main results regarding the transition to adult life can be summarized in two words, complexity and variance. Usually it was a "long" transition but the number of accomplished keytransitions and the order between them varied, as well as ages when taking the first Holy Communion, leaving home, marriage and entering parenthood varied. Transitional patterns varied between different categories of youth. A dividing line existed between the sexes, those from households strongly rooted in the agricultural structure and those with background in social categories that didn't own or was in possession of land. Social norms related to keytransitons changed along this dividing line during the investigated period of time, and became less permissive within landowning or land-possessing categories and less prescriptive in other categories.Transitional patterns were also influenced by the social situation at different historical times. The need for labor, war and years of famine directly intervened in timing and sequencing of keytransitions. A long term development was that the transition to adult life became more problematic in the later part of the 19th century, especially among young people who were less integrated in the social context and among socially stigmatized youth. Finally, young people were active and reflexive in seeking social space to make the transition to adult life, actions that sometimes caused tensions and conflicts between generations.
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| 3. |
- Bergman, Mats, 1964-, et al.
(författare)
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An econometric analysis of the European Commission’s merger decisions
- 2003
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Using a sample of 96 mergers notified to the EU Commission and logit regression techniques, we analyse the Commission's decision process. We find that the probability of a phase 2 investigation and of a prohibition of the merger increases with the parties' market shares. The probability increases also when the Commission finds high entry barriers or that post-merger collusion is easy. We do not find significant effects of political variables, such as the nationality of the merging firms or the identity of the commissioner.
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| 4. |
- Boström, Ola, 1963, et al.
(författare)
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Comparison of car seats in low speed rear-end impacts using the BioRID dummy and the new neck injury criterion (NIC).
- 2000
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Ingår i: Accident Analysis and Prevention. ; 32:2, s. 321-328
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Tidskriftsartikel (refereegranskat)abstract
- Long-term whiplash associated disorders (WAD) 1-3 sustained in low velocity rear-end impacts is the most common disability injury in Sweden. Therefore, to determine neck injury mechanisms and develop methods to measure neck-injury related parameters are of importance for current crash-safety research. A new neck injury criterion (NIC) has previously been proposed and evaluated by means of dummy, human and mathematical rear-impact simulations. So far, the criterion appears to be sensitive to the major car and collision related risk factors for injuries with long-term consequences. To further evaluate the applicability of NIC, four seats were tested according to a recently proposed sled-test procedure. 'Good' as well as 'bad' seats were chosen on the basis of a recently presented disability risk ranking list. The dummy used in the current tests was the Biofidelic Rear Impact Dummy (BioRID). The results of this study showed that NICmax values were generally related to the real-world risk of long-term WAD 1-3. Furthermore, these results suggested that NICmax calculated from sled tests using the BioRID dummy can be used for evaluating the neck injury risk of different car seats.
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| 5. |
- Jakobsson, Lotta, 1967, et al.
(författare)
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Evaluation criteria for AIS 1 neck injuries in frontal impacts - A parameter study combining field data and Madymo modelling
- 2004
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Ingår i: Traffic Injury Prevention. - : Informa UK Limited. - 1538-957X .- 1538-9588. ; 5:4, s. 374-381
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Tidskriftsartikel (refereegranskat)abstract
- Two situations with an expected higher AIS 1 neck injury rate in frontal impact were compared to a reference situation using a Madymo human body model in three different sitting postures and four different crash pulses. The two situations were reduced occupant weight and occupant with initial forward arm resistance, respectively. Occupant neck motion phases were identified and corresponding possible evaluation criteria were evaluated within the phases. Typical neck kinematics was seen for the two different situations. Occupants of lower weight had a more extended neck in the initial protraction phase and also a generally more pronounced upper neck link angle. Occupants with initial arm resistance had generally greater lower neck link angle at the time when the upper neck link angle was straight. No evaluation criteria reflected the anticipated AIS 1 neck injury rate consistently. In the initial protraction phase, NICmincorrelated to expected injury outcome in almost half of the cases. In the protractionflexion shift phase, Nkm, Nij, upper neck shear force and neck tension force reflected anticipated severity outcome to some extent. In the flexion phase, upper and lower neck extension correlated to anticipated AIS 1 neck injury rate only to a minor extent. The different sitting postures were more influential than the different crash pulses, emphasizing the importance of not only considering the spectra of impact severity but also differences in sitting postures in safety system development and evaluation.
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| 6. |
- Jakobsson, Lotta, 1967, et al.
(författare)
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Parameters influencing AIS 1 neck injury outcome in frontal impacts
- 2004
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Ingår i: Traffic Injury Prevention. - : Informa UK Limited. - 1538-957X .- 1538-9588. ; 5:2, s. 156-63
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Tidskriftsartikel (refereegranskat)abstract
- In order to gain more knowledge of the neck injury scenario in frontal impacts, a statistical study of parameters influencing incidences of AIS 1 neck injuries was performed. The data set consisted of 616 occupants in Volvo cars. Information regarding the crash, the safety systems, occupant characteristics (including prior neck problems), behavior and sitting posture at the time of impact, and neck symptoms (including duration) was collected and analyzed. Occupant characteristics (mainly gender, weight, and age), kinematics (head impacts) and behavior at the time of impact were identified as the most prominent parameter areas with regard to AIS 1 neck injury outcome. Specifically, women had a significantly higher AIS 1 neck injury rate as compared to men, occupants under the age of 50 had a significantly higher AIS 1 neck injury rate as compared to those above 50 and occupants weighing less than 65 kg have a significantly higher AIS 1 neck injury rate than heavier occupants. Drivers stating that they impacted their head against a frontal interior structure had a significantly higher AIS 1 neck injury rate than those without head impact. Also, occupants who stated they had tensed their neck muscles at the time of impact, had a significantly higher AIS 1 neck injury rate as compared to occupants who did not. Occupant activities, such as tightly gripping the steering wheel or straightening their arms showed a significantly increased AIS 1 neck injury rate, indicating that occupant behavior at time of impact could be influential with respect to AIS 1 neck injury outcome. Also, occupants reporting prior neck problems had a higher rate of persistent symptoms (>1 year) but no difference with respect to passing symptoms (
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