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S Danielsson

Publications and source records attributed to S Danielsson.

11 recordsLinked to original sources
PubMed2001

[Probatum est].

Explore the source record for details and available documents.

Administration, Intranasal↗
PubMed1991

Neck and shoulder complaints among sewing-machine operators: a study concerning frequency, symptomatology and dysfunction.

The occupation of sewing-machine operators (SMO) involves monotonous and repetitive tasks, performed in a work position equivalent to a static component of muscular load on the neck and shoulder. The present study concerns the occurrence of neck-shoulder problems in a population of SMO. A total of 224 SMO from four textile factories in the western part of Sweden were subjected to a comprehensive questionnaire about demographic, vocational, medical and psychosocial data. The Nordic Ministry Questionnaire specifically directed towards neck-shoulder complaints showed a prevalence rate during the last 12 months of 75% and during the last seven days a rate of 51%. Daily problems were experienced by 26%. Some 27% had had problems leading to restraints in work time and 37% in leisure time. Those SMO screening positive were clinically examined in an attempt to describe the clinical picture behind the complaints. Diagnoses were made according to specific criteria. The tension neck syndrome (TNS) was most frequent, followed by the cervical syndrome. In half of those examined, symptoms and findings were too unspecific for diagnosis. A positive correlation between the TNS and working hours per week suggests a daily prolonged static load on the neck and shoulder to be of importance for neck-shoulder problems among the SMO.

Journal Article↗
PubMed1988

Estimation of the effects of countermeasures on different types of accidents in the presence of regression effects.

In an earlier paper [Danielsson, 1986], we studied the problem of estimating the safety effect of a countermeasure on the expected number of accidents at road junctions when high-accident sites are selected for the study. Often, however, the countermeasure leads to varying effectiveness on different types of accidents. This paper is a generalization in that we estimate effects of countermeasures for each type of accident. A major result, for which empirical support is provided, is that the expected regression effect is the same for all types of accidents.

Accidents, Traffic↗
PubMed1986

A comparison of two methods for estimating the effect of a countermeasure in the presence of regression effects.

The report studies the problem of estimating in a non-experimental before-and-after investigation the effect of a countermeasure on the number of traffic accidents at road junctions. The accidents are assumed to occur according to a Poisson process with different intensities at different junctions. The junctions studied in this investigation are assumed to have been selected with the blackspot-technique, i.e. junctions with high numbers of accidents during the before-period have been chosen for the investigation. In the mathematical model this has the consequence that the number of accidents occurring during the before-period at a selected junction has a truncated Poisson distribution. During the after-period the number of accidents has a Poisson distribution (without restrictions), so that the number of accidents on the average decreases between the periods even if the countermeasure has no effect. The magnitude of this regression effect is studied in the report. The observed numbers of accidents during the before and after period are used to estimate the pure effect of the countermeasure both with an intuitive method and with the maximum likelihood method. The characteristics of the two methods of estimation are illustrated with the aid of simulation studies. In general the maximum likelihood method appears preferable, mainly because it produces estimates with higher precision.

Accidents, Traffic↗
PubMedDate not supplied

Rigid connections between natural teeth and implants: a technical note.

In the posterior partially edentulous jaw, implants may be used to supplement existing natural dentition. Frequently, the maxillary sinuses and the mandibular nerve preclude the fabrication of freestanding implant-retained prostheses. However, if an implant and a natural abutment are combined, a fixed prosthesis can be fabricated, restoring the arch into the premolar area. The histories of three patients with attachments connecting implant-retained ceramotitanium crowns with crowns on natural abutments are described. A design for a rigid custom-made attachment for the Brånemark system, using standard components with a machine-duplication, spark-erosion technique, is suggested.

Bicuspid↗