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Search Results: 1 - 10 of 72262 matches for " Ida-Maria Svensson "
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Storage and on-demand release of microwaves using superconducting resonators with tunable coupling
Mathieu Pierre,Ida-Maria Svensson,Sankar Raman Sathyamoorthy,G?ran Johansson,Per Delsing
Physics , 2014, DOI: 10.1063/1.4882646
Abstract: We present a system which allows to tune the coupling between a superconducting resonator and a transmission line. This storage resonator is addressed through a second, coupling resonator, which is frequency-tunable and controlled by a magnetic flux applied to a superconducting quantum interference device (SQUID). We experimentally demonstrate that the lifetime of the storage resonator can be tuned by more than three orders of magnitude. A field can be stored for 18 {\mu}s when the coupling resonator is tuned off resonance and it can be released in 14 ns when the coupling resonator is tuned on resonance. The device allows capture, storage, and on-demand release of microwaves at a tunable rate.
Twin paradox with macroscopic clocks in superconducting circuits
Joel Lindkvist,Carlos Sabín,Ivette Fuentes,Andrzej Dragan,Ida-Maria Svensson,Per Delsing,G?ran Johansson
Physics , 2013, DOI: 10.1103/PhysRevA.90.052113
Abstract: We propose an implementation of a twin paradox scenario in superconducting circuits, with velocities as large as a few percent of the speed of light. Ultrafast modulation of the boundary conditions for the electromagnetic field in a microwave cavity simulates a clock moving at relativistic speeds. Since our cavity has a finite length, the setup allows us to investigate the role of clock size as well as interesting quantum effects on time dilation. In particular, our theoretical results show that the time dilation increases for larger cavity lengths and is shifted due to quantum particle creation.
Barnets b sta i fr msta rummet. Reflektioner utifr n en konferens om Barnets b sta som r ttsligt begrepp i Troms
Eva-Maria Svensson
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2001,
Abstract: The best interest of the child is the most important principle in legal matters for children. However, there is no precise definition of the concept. We do not know what the best interest of the child is and neither do we know who is the most competent person to define it. The principle has several meanings, as a political aim as well as an ethical and legal principle. The legal principle can be interpreted extensive and offensive out of its purpose or as a rule, precisely and exclusively defined. These two ways of interpreting the best interest of the child, was the subject for a legal conference in Troms , Norway in January 2001. This article presents a reflection of the discussions.
Novel aspects of tRNA-derived small RNAs with potential impact in infectious diseases  [PDF]
Maria Rosa Garcia-Silva, Florencia Cabrera-Cabrera, Maria Catalina Güida, Alfonso Cayota
Advances in Bioscience and Biotechnology (ABB) , 2013, DOI: 10.4236/abb.2013.45A002
Abstract:

The complete understanding of the growing catalog of regulatory non-coding RNAs is going to shed light in different aspects of a wide range of pathogenic mechanisms in human diseases. This review was aimed to highlight recent advances in the small non- coding RNA world that could have implications in the development of new strategies in medical sciences. Among the diverse group of small non-coding RNAs, we highlight the group of tRNA-derived fragments as molecules known for a long time which have recently emerged as novel regulators influencing several aspects of cell biology. We describe here recent advances in the field of tRNA-derived fragments playing key roles in the biology of some infectious agents, including E. coli, A. fumigatus, G. lamblia, Ascaris, T. cruzi, Virus, Prions and a brief overview linking them to cancer biology. Additionally, we focus on the potential implications of these molecules in future biotechnological applications in the development of new biomarkers and as new therapeutic targets.

Efeitos da amplifica??o sonora sobre as modalidades comunicativas utilizadas pelos pais
Couto, Maria Inês Vieira;Lichtig, Ida;
Pró-Fono Revista de Atualiza??o Científica , 2007, DOI: 10.1590/S0104-56872007000100009
Abstract: background: auditory rehabilitation in deaf children users of sign language. aim: to verify the effects of sound amplification on parent's communicative modalities when interacting with their deaf children. method: participants were twelve deaf children, aged 50 to 80 months and their hearing parents. children had severe or profound hearing loss in their better ear and were fitted with hearing aids in both ears. children communicated preferably through sign language. the cause-effect relation between the children's auditory skills profile (insertion gain, functional gain and the meaningful auditory integration scale - mais) and the communicative modalities (auditive-oral, visuo-spacial, bimodal) used by parents was analyzed. communicative modalities were compared in two different experimental situations during a structured interaction between parents and children, i.e. when children were not fitted with their hearing aids (situation 1) and when children were fitted with them (situation 2). data was analyzed using descriptive statistics. results: the profile of the deaf children's auditory skills demonstrated to be lower than 53% (unsatisfactory). parents used predominately the bimodal modality to gain children's attention, to transmit and to end tasks. a slight positive effect of sound amplification on the communicative modalities was observed, once parents presented more turn-takings during communication when using the auditory-oral modality in situation 2. conclusion: hearing parents tend to use more turn-takings during communication in the auditory-oral modality to gain children's attention, to transmit and to end tasks, since they observe an improvement in the auditory skills of their children.
Overweight and Obese Children's Ability to Report Energy Intake Using Digital Camera Food Records during a 2-Year Study
sa Svensson,Maria Waling,Catharina B cklund,Christel Larsson
Journal of Nutrition and Metabolism , 2012, DOI: 10.1155/2012/247389
Abstract: The objective was to evaluate overweight and obese children's ability to report reproducible and valid estimates of energy intake (EI) by using digital camera food records (FR) during a 2-year study, compared with objectively measured total energy expenditure (TEE). Seventy-three overweight/obese children, aged 8–12 years at inclusion, kept FR with the help of digital cameras for 16 days in total, on 7 occasions during a 2-year period. On the same days, their TEE was registered with SenseWear Armband (SWA). The children underestimated their EI by −2.8 (2.4) MJ/d on the first assessment occasion (95% CI: −3.3, −2.3). Reporting accuracy did not differ between the 7 assessment occasions (=0.15). Variables negatively associated with reporting accuracy relative to TEE were increased age (95% CI: −0.07, −0.01) and BMI z-score (95% CI: −0.18, −0.06). Further, reporting accuracy relative to TEE was lower for girls than boys (95% CI: −0.14, −0.01) and on weekdays compared with weekend days (95% CI: −0.08, −0.001). In conclusion, overweight and obese children were able to report their EI using a digital camera FR with good reproducibility over a 2-year period, even though their EI was underestimated compared with objectively measured TEE.
Contribui??o ao estudo da interrela??o flúor-manganês em ratos
Oliveira, Ida Maria Vianna de;Pourchet-Campos, Maria Apparecida;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1980, DOI: 10.1590/S0071-12761980000200028
Abstract: an experiment to determine the effects of varying the manganese concentration of the diet on the fluorine retention in the femur of rats was made. four groups of weaning rats were fed "ad libitum a 27% casein synthetic diet and were provided with water as follows: 1) distilled (control); 2) containing 1 ppm of fluorine (f); 3) 1,0 ppm f + 0,5 ppm mn; 4) 1 ppm f + 1 ppm mn. the weight gain and food and water consumption were measured during 60 days. the results indicated that manganese does not seem to affect the proportional fixation of fluorine in the femur. the authors think that more data should be available before a definite conclusion on the influence of the ratio f:mn on the fluorine retention could be drawn.
The Concept of Oncoplastic Breast Surgery Applied in Surgery for a Giant Fibroadenoma  [PDF]
Michael Rose, Henry Svensson
Case Reports in Clinical Medicine (CRCM) , 2014, DOI: 10.4236/crcm.2014.34048
Abstract:

The treatment of a 40-year-old woman with a giant fibroadenoma in her left breast is presented. The fibroadenoma measured 14 × 5 × 3 cm and weighed 170 g. We demonstrate that the surgical strategy and the reconstructive techniques in oncoplastic breast cancer surgery successfully can be applied to the treatment of these rare benign tumours improving the cosmetic and functional outcome.

DarcyTools: A Computer Code for Hydrogeological Analysis of Nuclear Waste Repositories in Fractured Rock  [PDF]
Urban Svensson, Michel Ferry
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.26044
Abstract:

A computer code for simulation of groundwater flow and transport is described. Both porous and fractured media are handled by the code. The main intended application is the analysis of a deep repository for nuclear waste and for this reason flow and transport in a sparsely fractured rock is in focus. The mathematical and numerical models are described in some detail. In short, one may say that the code is based on the traditional conservation and state laws, but also embodies a number of submodels (subgrid processes, permafrost, etc). An unstructured Cartesian grid and a finite volume approach are the key elements in the discretization of the basic equations. A multigrid solver is part of the code as well as a parallelization option based on the SPMD (Single-Program Multiple-Data) method. The main application areas are summarized and an application to a deep repository is discussed in some more detail.

Analytical and Numerical Investigations of Probabilistic Monochromatic Problem  [PDF]
Stefan Schmuck, Jakob Svensson
Journal of Applied Mathematics and Physics (JAMP) , 2019, DOI: 10.4236/jamp.2019.74054
Abstract: A probabilistic formalism, relying on Bayes’ theorem and linear Gaussian inversion, is adapted, so that a monochromatic problem can be investigated. The formalism enables an objective test in probabilistic terms of the quantities and model concepts involved in the problem at hand. With this formalism, an amplitude (linear parameter), a frequency (non-linear parameter) and a hyperparameter of the Gaussian amplitude prior are inferred jointly given simulated data sets with Gaussian noise contributions. For the amplitude, an analytical normal posterior follows which is conditional on the frequency and the hyperparameter. The remaining posterior estimates the frequency with an uncertainty of MHz, while the convolution of a standard approach would achieve an uncertainty of some GHz. This improvement in the estimation is investigated analytically and numerically, revealing for instance the positive effect of a high signal-to-noise ratio and/or a large number of data points. As a fixed choice of the hyperparameter imposes certain results on the amplitude and frequency, this parameter is estimated and, thus, tested for plausibility as well. From abstract point of view, the model posterior is investigated as well.
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