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Search Results: 1 - 10 of 609 matches for " Bengt Petersson "
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High Temperature QCD and Dimensional Reduction
Bengt Petersson
Physics , 2000,
Abstract: In this talk I will first give a short discussion of some lattice results for QCD at finite temperature. I will then describe in some detail the technique of dimensional reduction, which in principle is a powerful technique to obtain results on the long distance properties of the quark-gluon plasma. Finally I will describe some new results, which test the technique in a simpler model, namely three dimensional gauge theory.
Dispensed drugs and multiple medications in the Swedish population: an individual-based register study
Bo Hovstadius, Bengt ?strand, G?ran Petersson
BMC Pharmacology and Toxicology , 2009, DOI: 10.1186/1472-6904-9-11
Abstract: Analyses of all dispensed out-patient prescriptions in 2006 from the Swedish prescribed drug register. As a cut-off for multiple medications, we applied five or more different drugs dispensed (DP ≥ 5) at Swedish pharmacies for a single individual during a 3-month, a 6-month, and a 12-month study period. For comparison, results were also calculated with certain drug groups excluded.6.2 million individuals received at least one dispensed drug (DP ≥ 1) during 12 months in 2006 corresponding to a prevalence of 67.4%; 75.6% for females and 59.3% for males. Individuals received on average 4.7 dispensed drugs per individual (median 3, Q1–Q3 2–6); females 5.0 (median 3, Q1–Q3 2–7), males 4.3 (median 3, Q1–Q3 1–6).The prevalence of multiple medications (DP ≥ 5) was 24.4% for the entire population. The prevalence increased with age. For elderly 70–79, 80–89, and 90-years, the prevalence of DP ≥ 5 was 62.4, 75.1, and 77.7% in the respective age groups. 82.8% of all individuals with DP ≥ 1 and 64.9% of all individuals with DP ≥ 5 were < 70 years.Multiple medications was more frequent for females (29.6%) than for males (19.2%). For individuals 10 to 39 years, DP ≥ 5 was twice as common among females compared to males. Sex hormones and modulators of the genital system excluded, reduced the relative risk (RR) for females vs. males for DP ≥ 5 from 1.5 to 1.4.The prevalence of DP ≥ 1 increased from 45.1 to 56.2 and 67.4%, respectively, when the study period was 3, 6, and 12 respectively months and the corresponding prevalence of DP ≥ 5 was 11.3, 17.2, and 24.4% respectively.The prevalence of dispensed drugs and multiple medications were extensive in all age groups and were higher for females than for males. Multiple medications should be regarded as a risk in terms of potential drug-drug interactions and adverse drug reactions in all age groups.The total sale of drugs has increased successively during the last decades [1,2]. The increase depends, among other things, on the introduct
Increasing polypharmacy - an individual-based study of the Swedish population 2005-2008
Bo Hovstadius, Karl Hovstadius, Bengt ?strand, G?ran Petersson
BMC Pharmacology and Toxicology , 2010, DOI: 10.1186/1472-6904-10-16
Abstract: By applying individual-based data on dispensed drugs, we have studied all dispensed prescribed drugs for the entire Swedish population during four 3-month periods 2005-2008. Five or more (DP ≥5) and ten or more (DP ≥10) dispensed drugs during the 3-month period was applied as the cut-offs indicating the existence of polypharmacy and excessive polypharmacy respectively.During the period 2005-2008, the prevalence of polypharmacy (DP≥5) increased by 8.2% (from 0.102 to 0.111), and the prevalence of excessive polypharmacy (DP≥10) increased by 15.7% (from 0.021 to 0.024).In terms of age groups, the prevalence of polypharmacy and excessive polypharmacy increased as regards all ages with the exception of the age group 0-9 years. However, the prevalence of excessive polypharmacy displayed a clear age trend, with the largest increase for the groups 70 years and above. Furthermore, the increase in the prevalence of polypharmacy was, generally, approximately twice as high for men as for women. Finally, the mean number of dispensed drugs per individual increased by 3.6% (from 3.3 to 3.4) during the study period.The prevalence of polypharmacy and excessive polypharmacy, as well as the mean number of dispensed drugs per individual, increased year-by-year in Sweden 2005-2008.It is clear that a continuous increase in the overall level of drug use, especially among elderly, has been noted in several countries. Moreover, an increase in the number of individuals experiencing polypharmacy, ie. the concurrent use of several different drugs, has also been reported [1-3].Whilst the use of a number of different drugs for many individuals appears to be a rational drug therapy, and polypharmacy is assumed to provide major health benefits for the well being of large groups of individuals suffering from different diseases, polypharmacy is also a well known risk factor due to adverse drug reactions, drug-drug interactions, and low adherence to drug therapy [3-5].In addition, it is also assumed
Assessment of ePrescription quality: an observational study at three mail-order pharmacies
Bengt ?strand, Emelie Montelius, G?ran Petersson, Anders Ekedahl
BMC Medical Informatics and Decision Making , 2009, DOI: 10.1186/1472-6947-9-8
Abstract: A direct observational study was performed at three Swedish mail-order pharmacies which were known to dispense a large proportion of ePrescriptions (38–75%). Data were gathered on all ePrescriptions dispensed at these pharmacies over a three week period in February 2006. All clarification contacts with prescribers were included in the study and were classified and assessed in comparison with all drug prescriptions dispensed at the same pharmacies over the specified period.Of the 31225 prescriptions dispensed during the study period, clarification contacts were made for 2.0% (147/7532) of new ePrescriptions and 1.2% (79/6833) of new non-electronic prescriptions. This represented a relative risk (RR) of 1.7 (95% CI 1.3–2.2) for new ePrescriptions compared to new non-electronic prescriptions. The increased RR was mainly due to 'Dosage and directions for use', which had an RR of 7.6 (95% CI 2.8–20.4) when compared to other clarification contacts. In all, 89.5% of the suggested pharmacist interventions were accepted by the prescriber, 77.7% (192/247) as suggested and an additional 11.7% (29/247) after a modification during contact with the prescriber.The increased proportion of prescriptions necessitating a clarification contact for new ePrescriptions compared to new non-electronic prescriptions indicates the need for an increased focus on quality aspects in ePrescribing deployment. ETP technology should be developed towards a two-way communication between the prescriber and the pharmacist with automated checks of missing, inaccurate, or ambiguous information. This would enhance safety and quality for the patient and also improve efficiency and cost-effectiveness within the health care system.The introduction of electronic transfer of prescriptions (ETP), or ePrescriptions, in ambulatory health care has been suggested to have a positive impact on the prescribing and dispensing processes implying that ePrescribing can improve safety, quality, efficiency and cost-effective
Three dimensional finite temperature SU(3) gauge theory near the phase transition
Piotr Bialas,Lukasz Daniel,Andre Morel,Bengt Petersson
Physics , 2012, DOI: 10.1016/j.nuclphysb.2013.02.007
Abstract: We have measured the correlation function of Polyakov loops on the lattice in three dimensional SU(3) gauge theory near its finite temperature phase transition. Using a new and powerful application of finite size scaling, we furthermore extend the measurements of the critical couplings to considerably larger values of the lattice sizes, both in the temperature and space directions, than was investigated earlier in this theory. With the help of these measurements we perform a detailed finite size scaling analysis, showing that for the critical exponents of the two dimensional three state Potts model the mass and the susceptibility fall on unique scaling curves. This strongly supports the expectation that the gauge theory is in the same universality class. The Nambu-Goto string model on the other hand predicts that the exponent \nu has the mean field value, which is quite different from the value in the abovementioned Potts model. Using our values of the critical couplings we also determine the continuum limit of the value of the critical temperature in terms of the square root of the zero temperature string tension. This value is very near to the prediction of the Nambu-Goto string model in spite of the different critical behaviour.
Physicians' attitudes towards ePrescribing – evaluation of a Swedish full-scale implementation
Lina Hellstr?m, Karolina Waern, Emelie Montelius, Bengt ?strand, Tony Rydberg, G?ran Petersson
BMC Medical Informatics and Decision Making , 2009, DOI: 10.1186/1472-6947-9-37
Abstract: Physicians (n = 431) from seven out of the 21 Swedish health care regions, using one of the six most widely implemented EHR-systems with integrated electronic prescribing modules, were recruited from primary care centers and hospital clinics of internal medicine, orthopaedics and surgery. The physicians received a web survey that comprised eight questions on background data and 19 items covering attitudes towards ePrescribing. Forty-two percent (n = 199) of the physicians answered the questionnaire; 90% (n = 180) of the respondents met the inclusion criteria and were included in the final analysis.A majority of the respondents regarded their EHR-system easy to use in general (81%), and for the prescribing of drugs (88%). Most respondents believed they were able to provide the patients better service by ePrescribing (92%), and regarded ePrescriptions to be time saving (91%) and to be safer (83%), compared to handwritten prescriptions. Some of the most frequently reported weaknesses were: not clearly displayed price of drugs (43%), complicated drug choice (21%), and the perception that it was possible to handle more than one patient at a time when ePrescribing (13%). Moreover, 62% reported a lack of receipt from the pharmacy after successful transmission of an ePrescription. Although a majority (73%) of the physicians reported that they were always or often checking the ePrescription a last time before transmitting, 25% declared that they were seldom or never doing a last check. The respondents suggested a number of improvements, among others, to simplify the drug choice and the cancellation of ePrescriptions.The Swedish physicians in the group studied were generally satisfied with their specific EHR-system and with ePrescribing as such. However, identified weaknesses warrant improvements of the EHR-systems as well as of their implementation in the individual health care organisation.For hundreds of years, the written prescription has been the method of choice for phy
Anisotropic Vapor HF etching of silicon dioxide for Si microstructure release
Vikram Passi,Ulf Sodervall,Bengt Nilsson,Goran Petersson,Mats Hagberg,Christophe Krzeminski,Emmanuel Dubois,Bert Du Bois,Jean-Pierre Raskin
Physics , 2012, DOI: 10.1016/j.mee.2012.01.005
Abstract: Damages are created in a sacrificial layer of silicon dioxide by ion implantation to enhance the etch rate of silicon-dioxide in liquid and vapor phase hydrofluoric acid. The etch rate ratio between implanted and unimplanted silicon dioxide is more than 150 in vapor hydrofluoric acid (VHF). This feature is of interest to greatly reduce the underetch of microelectromechanical systems anchors. Based on the experimentally extracted etch rate of unimplanted and implanted silicon dioxide, the patterning of the sacrificial layer can be predicted by simulation.
Developing and Establishing the Psychometric Properties of an Ethos towards Wellness Questionnaire (EtWeQ)  [PDF]
Bengt Fridlund, Amir Baigi
Open Journal of Nursing (OJN) , 2014, DOI: 10.4236/ojn.2014.47057

Aim: Validated instruments exist measuring parts of personal health, ill-health and lifestyle, but there are few, if any, instruments “grasping the big picture” of wellness and ethos. Accordingly the aim was to develop and establish the psychometric properties of a 74-item Ethos towards Wellness Questionnaire (EtWeQ) with regards to content and construct validity, as well as homogeneity and stability reliability. Methods: A questionnaire based on a methodological and developmental design was sent out twice with a four week gap between, on 221 healthy middle-aged participants in four steps: item generating, content validating, statistical analyzing and establishing the final questionnaire. Results: The substantial base, consisting of content validity resulted in, besides basic characteristics, six well-defined and sufficient indexes comprising of; two health indexes (healthiness and ill-healthiness), three life context indexes (work, family, spare time), and one brief comprehensive index (ethos). The three life context as well as the ethos indexes at an ordinal scale level, identified overall satisfactory communalities of >0.30, factor loadings > 0.30, and factor total variance > 50% with regard to construct validity. The homogeneity reliability, in terms of Cronbach’s alpha coefficient > 0.70, at both occasions with a four week gap between, as well as the stability reliability in terms of intraclass correlation coefficient > 0.70, were also considered satisfactory in the same indexes. Conclusions: This newly developed, and likely the only

Demokrati, svenskl rarutbildning och m ngkulturalism
Margareta Petersson
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2003,
Multilepton and multiphoton signatures of supersymmetry at the LHC
Christoffer Petersson
Physics , 2014,
Abstract: Motivated by the absence of any clear signal of physics beyond the Standard Model at the LHC after Run I, we discuss one possible slight hint of new physics and one non-minimal extension of the Standard Model. In the first part we provide a tentative explanation of a small excess of multilepton events, observed by the CMS collaboration, by means of a simplified model of gauge mediated supersymmetry breaking. In the second part we discuss how the standard phenomenology of gauge mediation can be significantly modified if one makes the non-minimal assumption that supersymmetry is broken in more than one hidden sector. Such multiple hidden sector models involve light neutral fermions called pseudo-goldstini and, due to the extra decay steps they induce, where soft photons are emitted, these models give rise to multiphoton plus missing energy signatures. We discuss why the existing LHC searches are poorly sensitive to these model and we propose new searches designed to probe them.
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