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- Hössjer, Ola, et al.
(författare)
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Bayesian Distributed Detection by Sensor Networks with Missing Data
- 2012
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- We consider detection and identication of a moving target, using a network of sensors. The target emits a signal; a stationary stochastic process corrupted by additive noise, independently across sensors. Before intersensor communication, all sensors reduce external data as energy over disjoint frequency bands and time blocks. One sensor, the internal fusion center (IFC), gathers feature vectors from the other sensors, possibly after message passing. Using Bayesian decision theory, it decides for presence or absence of the target and computes a maximum posterior estimate of target (trajectory and spectral) parameters. The main novelties of the paper are: 1) To apply statistical theory of missing data to an inter-sensor communication protocol which censors weak signals before transmission and an imperfect channel in which some transmitted signals are lost. A Naive Bayes approximate detector is dened, which requires recursive computation of reception probabilities. 2) To derive asymptotic approximations of the distribution of the spectral feature vectors and a Laplace type approximation of the detector. The performance of the proposed Bayesian detector is shown in a simulation study to be only slightly inferior to that of an ideal Bayesian detector (with no missing data), as well as superior to a naive detector.
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- Omerov, Pernilla, et al.
(författare)
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Encountering the Body at the Site of the Suicide : A Population-Based Survey in Sweden.
- 2017
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Ingår i: Journal of Suicide and Life-threatening Behaviour. - : Wiley. - 0363-0234 .- 1943-278X. ; 47:1, s. 38-47
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Tidskriftsartikel (refereegranskat)abstract
- Encountering the body of a child who died by suicide at the site of death is believed to be especially harmful for bereaved parents. We investigated the association between encountering the body at the site of the suicide and psychological distress in 666 suicide-bereaved parents. Parents who had encountered their child's body at the site of the suicide (n = 147) did not have a higher risk of nightmares (relative risk [RR] 0.95, 95% confidence interval [CI] 0.67-1.35), intrusive memories (RR 0.97, 95% CI 0.84-1.13), avoidance of thoughts (RR 0.97, 95% CI 0.74-1.27), avoidance of places or things (RR 0.91, 95% CI 0.66-1.25), anxiety (RR 0.93, 95% CI 0.64-1.33), or depression (RR 0.94, 95% CI 0.63-1.42) compared with parents who had not encountered the body (n = 512). Our results suggest that losing a child by suicide is sufficiently disastrous by itself to elicit posttraumatic responses or psychiatric morbidity whether or not the parent has encountered the deceased child at the site of death.
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- Omerov, Pernilla, et al.
(författare)
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Viewing the body after bereavement due to suicide: a population-based survey in Sweden.
- 2014
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Ingår i: PloS one. - : Public Library of Science (PLoS). - 1932-6203. ; 9:7
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Tidskriftsartikel (refereegranskat)abstract
- Research on the assumed, positive and negative, psychological effects of viewing the body after a suicide loss is sparse. We hypothesized that suicide-bereaved parents that viewed their childs body in a formal setting seldom regretted the experience, and that viewing the body was associated with lower levels of psychological morbidity two to five years after the loss.
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- Pettersen, Rossana, et al.
(författare)
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Lack of Trust in the Health-Care System After Losing a Child to Suicide.
- 2015
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Ingår i: Crisis. - : Hogrefe Publishing Group. - 0227-5910 .- 2151-2396. ; 36:3, s. 161-72
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Tidskriftsartikel (refereegranskat)abstract
- Lack of trust in the health-care system after losing a child to suicide may prevent bereaved parents from seeking professional treatment when needed, thus diminishing their chances of recovery.
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- Adding, Christofer, et al.
(författare)
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Robotkirurgi ger bra resultat vid radikal prostatektomi. Prostatacancer kan behandlas mer effektivt och skonsamt : [Good results in robot-assisted radical prostatectomy. Prostatic cancer can be treated more effectively and carefully].
- 2011
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Ingår i: Läkartidningen. - 0023-7205. ; 108:19, s. 1053-1057
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Tidskriftsartikel (refereegranskat)abstract
- Operationsresultat redovisas för män opererade med radikal prostatektomi – öppen kirurgi jämfört med robotassisterad laparaskopi – under 2002–2006 vid Karolinska universitetssjukhuset, Solna. Män som följdes under minst 1 år besvarade enkätfrågor; 768 robotkirurgiska och 411 öppenkirurgiska operationer utvärderades. Under perioden minskade andelen män med positiv resektionsrand från 37 procent till 22 procent och med erektil dysfunktion från 66 procent till 60 procent. Andelen optimala operationsresultat (»trifecta«) ökade från 19 procent till 28 procent. Vi har inte hittat några indikationer på att införandet av robotkirurgi har försämrat situationen för män diagnostiserade med prostatacancer. Vi kan inte avgöra om de positiva operationsresultaten skulle ha blivit bättre eller sämre om ett utvecklingsprogram för öppen radikal prostatektomi i stället initierats. En nationell studie, LAPPRO, avseende effekterna av de två operationsformerna pågår.
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| 9. |
- Adding, Christofer, et al.
(författare)
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Robotkirurgi ger bra resultat vid radikal prostatektomi. Prostatacancer kan behandlas mer effektivt och skonsamt
- 2011
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Ingår i: Läkartidningen. - 1652-7518 .- 0023-7205. ; 108:19, s. 1053-1057
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Tidskriftsartikel (refereegranskat)abstract
- Operationsresultat redovisas för män opererade med radikal prostatektomi – öppen kirurgi jämfört med robotassisterad laparaskopi – under 2002–2006 vid Karolinska universitetssjukhuset, Solna.Män som följdes under minst 1 år besvarade enkätfrågor; 768 robotkirurgiska och 411 öppenkirurgiska operationer utvärderades.Under perioden minskade andelen män med positiv resektionsrand från 37 procent till 22 procent och med erektil dysfunktion från 66 procent till 60 procent. Andelen optimala operationsresultat (»trifecta«) ökade från 19 procent till 28 procent.Vi har inte hittat några indikationer på att införandet av robotkirurgi har försämrat situationen för män diagnostiserade med prostatacancer.Vi kan inte avgöra om de positiva operationsresultaten skulle ha blivit bättre eller sämre om ett utvecklingsprogram för öppen radikal prostatektomi i stället initierats.En nationell studie, LAPPRO, avseende effekterna av de två operationsformerna pågår.
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- Alevronta, Eleftheria, et al.
(författare)
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Dose-response relationships for an atomized symptom of fecal incontinence after gynecological radiotherapy.
- 2013
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Ingår i: Acta oncologica (Stockholm, Sweden). - : Taylor & Francis. - 1651-226X .- 0284-186X. ; 52:4, s. 719-26
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Tidskriftsartikel (refereegranskat)abstract
- Purpose. The aim of this study was to investigate what bowel organ and delivered dose levels are most relevant for the development of 'emptying of all stools into clothing without forewarning' so that the related dose-responses could be derived as an aid in avoiding this distressing symptom in the future. Material and methods. Of the 77 gynecological cancer survivors treated with radiotherapy (RT) for gynecological cancer, 13 developed the symptom. The survivors were treated between 1991 and 2003. The anal-sphincter region, the rectum, the sigmoid and the small intestines were all delineated and the dose-volume histograms were exported for each patient. The dose-volume parameters were estimated fitting the data to the Relative Seriality (RS), the Lyman and the generalized Equivalent Uniform Dose (gEUD) model. Results. The dose-response parameters for all three models and four organs at risk (OARs) were estimated. The data from the sigmoid fits the studied models best: D50 was 58.8 and 59.5 Gy (RS, Lyman), γ50 was 1.60 and 1.57 (RS, Lyman), s was 0.32, n was 0.13 and a was 7.7 (RS, Lyman, gEUD). The estimated volume parameters indicate that the investigated OARs behave serially for this endpoint. Our results for the three models studied indicate that they have the same predictive power (similar LL values) for the symptom as a function of the dose for all investigated OARs. Conclusions. In our study, the anal-sphincter region and sigmoid fit our data best, but all OARs were found to have steep dose-responses for 'emptying of all stools into clothing without forewarning' and thus, the outcome can be predicted with an NTCP model. In addition, the dose to the four studied OARs may be considered when minimizing the risk of the symptom.
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