| 1. |
- Abulaiti, Yiming, et al.
(författare)
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Search for the Standard Model Higgs boson produced by vector-boson fusion and decaying to bottom quarks in root s=8TeV pp collisions with the ATLAS detector
- 2016
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Ingår i: Journal of High Energy Physics (JHEP). - : Springer. - 1126-6708 .- 1029-8479. ; :11
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Tidskriftsartikel (refereegranskat)abstract
- A search with the ATLAS detector is presented for the Standard Model Higgs boson produced by vector-boson fusion and decaying to a pair of bottom quarks, using 20.2 fb(-1) of LHC proton-proton collision data at root s - 8 TeV. The signal is searched for as a resonance in the invariant mass distribution of a pair of jets containing b-hadrons in vector-boson-fusion candidate events. The yield is measured to be -0.8 +/- 2.3 times the Standard Model cross-section for a Higgs boson mass of 125 GeV. The upper limit on the cross-section times the branching ratio is found to be 4.4 times the Standard Model cross-section at the 95% confidence level, consistent with the expected limit value of 5.4 (5.7) in the background-only (Standard Model production) hypothesis.
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| 2. |
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| 3. |
- Agrawal, Piyush, et al.
(författare)
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Long Term Channel Characterization for Energy Efficient Transmission in Industrial Environments
- 2014
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Ingår i: IEEE Transactions on Communications. - 0090-6778 .- 1558-0857. ; 62:8, s. 3004-3014
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Tidskriftsartikel (refereegranskat)abstract
- One of the challenges for a successful use of wireless sensor networks in process industries is to design networks with energy efficient transmission, to increase the lifetime of the deployed network while maintaining the required latency and bit-error rate. The design of such transmission schemes depend on the radio channel characteristics of the region. This paper presents an investigation of the statistical properties of the radio channel in a typical process industry, particularly when the network is meant to be deployed for a long time duration, e. g., days, weeks, and even months. Using 17-20-h-long extensive measurement campaigns in a rolling mill and a paper mill, we highlight the non-stationarity in the environment and quantify the ability of various distributions, given in the literature, to describe the variations on the links. Finally, we analyze the design of an optimal received signal-to-noise ratio (SNR) for the deployed nodes and show that improper selection of the distribution for modeling of the variations in the channel can lead to an overuse of energy by a factor of four or even higher.
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| 4. |
- Ahlund, Claes
(författare)
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Stig Dagerman som lyriker i "Birgitta svit"
- 1996
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Ingår i: Samlaren: tidskrift. - Uppsala : Svenska Litteratursällskapet. - 0348-6133 .- 2002-3871. ; 1996, s. 28-50
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Tidskriftsartikel (refereegranskat)
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| 5. |
- Ahs, Fredrik, et al.
(författare)
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High-frequency heart rate variability and cortico-striatal activity in men and women with social phobia
- 2009
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Ingår i: NeuroImage. - : Elsevier BV. - 1053-8119 .- 1095-9572. ; 47:3, s. 815-820
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Tidskriftsartikel (refereegranskat)abstract
- Identifying brain systems that regulate or modulate autonomic nervous system functions may identify pathways through which psychosocial factors can influence health and disease. Reduced high-frequency heart rate variability (HF-HRV) characterizes anxiety disordered patients and is predictive of adverse myocardial events. Sex differences in the prevalence of anxiety disorders and cardiac diseases implicate the possibility of sex specific neural regulation of HF-HRV. We investigated the correlation between HF-HRV and regional cerebral blood flow (rCBF) in 28 subjects (15 women) with social phobia undergoing a stressful public speaking task. Regional CBF was measured with [(15)O] water positron emission tomography. Stress induced rCBF correlated positively with HF-HRV in the right supra genual anterior cingulate cortex Brodmann's area (BA) 32, the right head of the caudate nucleus and bilaterally in the medial prefrontal cortex (BA10), extending into the dorsolateral prefrontal cortex (BA46) in the left hemisphere. Men showed larger positive co-variation in the caudate than women. These findings underscore the importance of the emotional division of the anterior cingulate cortex, the prefrontal cortex and the striatum in cardiovagal activity. The study replicates and extends results from published functional neuroimaging studies on cardioregulatory or modulatory areas in healthy subjects to men and women with social phobia. Moreover, caudate functions, possibly related to dopaminergic neurotransmission, have sexually dimorphic effects on vagal modulation of the heart.
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| 6. |
- Akbari-Saatlu, Mehdi, et al.
(författare)
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Nanometer-Thick ZnO/SnO2Heterostructures Grown on Alumina for H2S Sensing
- 2022
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Ingår i: ACS Applied Nano Materials. - : American Chemical Society (ACS). - 2574-0970. ; 5:5, s. 6954-6963
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Tidskriftsartikel (refereegranskat)abstract
- Designing heterostructure materials at the nanoscale is a well-known method to enhance gas sensing performance. In this study, a mixed solution of zinc chloride and tin (II) chloride dihydrate, dissolved in ethanol solvent, was used as the initial precursor for depositing the sensing layer on alumina substrates using the ultrasonic spray pyrolysis (USP) method. Several ZnO/SnO2 heterostructures were grown by applying different ratios in the initial precursors. These heterostructures were used as active materials for the sensing of H2S gas molecules. The results revealed that an increase in the zinc chloride in the USP precursor alters the H2S sensitivity of the sensor. The optimal working temperature was found to be 450 °C. The sensor, containing 5:1 (ZnCl2: SnCl2·2H2O) ratio in the USP precursor, demonstrates a higher response than the pure SnO2 (∼95 times) sample and other heterostructures. Later, the selectivity of the ZnO/SnO2 heterostructures toward 5 ppm NO2, 200 ppm methanol, and 100 ppm of CH4, acetone, and ethanol was also examined. The gas sensing mechanism of the ZnO/SnO2 was analyzed and the remarkably enhanced gas-sensing performance was mainly attributed to the heterostructure formation between ZnO and SnO2. The synthesized materials were also analyzed by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray, transmission electron microscopy, and X-ray photoelectron spectra to investigate the material distribution, grain size, and material quality of ZnO/SnO2 heterostructures.
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| 7. |
- Ali Khan, A., et al.
(författare)
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Does in utero exposure to synthetic glucocorticoids influence birthweight, head circumference and birth length? : A systematic review of current evidence in humans
- 2011
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Ingår i: Paediatric and Perinatal Epidemiology. - : Wiley. - 0269-5022 .- 1365-3016. ; 25:1, s. 20-36
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Forskningsöversikt (refereegranskat)abstract
- Synthetic glucocorticoids are the mainstay treatment for stimulating lung maturation in threatened preterm delivery. Animal studies suggest that in utero exposure to glucocorticoids leads to a reduction in birth size. Smaller birthweight has been associated with higher risk of many chronic diseases. Therefore, the authors undertook a systematic review of human studies examining the association between synthetic glucocorticoid treatment and birth size. Medline, EMBASE, PubMed, Cochrane, Google scholar and Institute of Life Science databases were searched for studies published between 1978 and 2009 investigating the association between synthetic glucocorticoids and birthweight, head circumference, birth length and ponderal index. All studies controlling for gestational age were examined. Seventeen studies were included in the analysis. Nine out of 17 studies reported a reduction in birthweight (range 12-332 g), five of nine a reduction of head circumference (range 0.31-1.02 cm) and two of four a reduction of 0.8 cm in birth length. Despite methodological inconsistencies and limitations that impede clear conclusions, the evidence suggests an association between in utero exposure to synthetic glucocorticoids and reduced birth size.
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| 8. |
- Almén, Niclas, et al.
(författare)
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Validation of the new brief 6-item version of the Shirom-Melamed Burnout Measure
- 2023
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Ingår i: Cogent Psychology. - : Taylor & Francis. - 2331-1908. ; 10:1
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Tidskriftsartikel (refereegranskat)abstract
- The Shirom-Melamed Burnout Questionnaire/Measure (SMBQ/M) is one of the most commonly used measures of burnout. Using confirmatory factor analyses, the present study aimed to evaluate the model fit, composite reliability, and factorial (i.e. convergent and discriminant) validity of the new brief Swedish version of the scale-labeled SMBM-6. In addition, we used Cronbach’s α as an indicator of the internal consistency of the total scale. The SMBM-6 consists of two subscales: the emotional and physiological exhaustion subscale (three items) and the cognitive weariness subscale (three items). A total of 1251 teachers in Sweden were included in the study. The analyses showed that the Swedish version of the SMBM-6 has an excellent model fit and good convergent validity. The discriminant validity for the cognitive weariness subscale was good, but slightly inadequate for the physiological exhaustion subscale. Composite reliability and Cronbach’s α indicated high internal consistency for the subscales and the total scale, respectively. Multi-group invariance tests for age indicated no violation of invariance. These results are consistent with those of the study by Almén and Jansson (2021), in which the SMBM-6 was developed, and a subsequent psychometric study by Sundström et al. (2022). In conclusion, there is strong support for the Swedish version of the SMBM-6 as a reliable and valid scale for measuring burnout. Testing the scale in languages other than Swedish is warranted.
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| 9. |
- Almqvist, Jonas, 1968-, et al.
(författare)
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Pragmatiska studier av meningsskapande
- 2008
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Ingår i: Utbildning och Demokrati. - 1102-6472 .- 2001-7316. ; 17:3, s. 11-24
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Tidskriftsartikel (refereegranskat)abstract
- The overall aim of the article is to present a pragmatic approach for studies of meaning-making used in the articles of this issue. The approach, which is developed within the SMEDgroup (Studies of Meaning-making in Educational Discourses), mainly builds on the writings of John Dewey, Ludwig Wittgenstein and Michel Foucault. A common ambition for the researchers in SMED is to enable studies and discussions on questions concerning how meanings are made in people’s actions. Another ambition is to carry out these studies beyond assumptions of dualism, essentialism, causality and determinism. In this perspective learning and socialization are viewed in a communicative perspective. We argue in the article that our approach makes it possible, and important, to study meaning-making in action in different kinds of educational practices.
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| 10. |
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