| 1. |
- Gao, Y. H., et al.
(författare)
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A comparison design of comb decimators for sigma-delta analog-to-digital converters
- 2000
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Ingår i: Analog Integrated Circuits and Signal Processing. - 0925-1030 .- 1573-1979. ; 22:1, s. 51-60
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Tidskriftsartikel (refereegranskat)abstract
- This paper presents a comparison design of comb decimators based on the non-recursive algorithm and the recursive algorithm. Compared with the recursive algorithm, the main advantage of the non-recursive algorithm is its abilities of reducing power consumption and increasing circuit speed especially when the decimation ratio and filter order are high. Based on the non-recursive algorithm, a decimator with programmable filter orders (3rd, 4th and 5th), decimation ratios (8, 16, 32 and 64) and input bits (1 and 2 bits) has been implemented in a 0.6 mu m 3.3 V CMOS process. Its measured core power consumption is 44 mW at the oversampling rate of 25 MHz and its highest input data rate is 110 MHz.
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| 2. |
- Hellevuo, H., et al.
(författare)
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Good quality of life before cardiac arrest predicts good quality of life after resuscitation
- 2018
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Ingår i: Acta Anaesthesiologica Scandinavica. - : WILEY. - 0001-5172 .- 1399-6576. ; 62:4, s. 515-521
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Tidskriftsartikel (refereegranskat)abstract
- Background: The survival rate of cardiac arrest patients is increasing. Our aim was to compare the quality of life before and after cardiac arrest and analyse the factors associated with outcome.Methods. All adult cardiac arrest patients admitted to the Tampere University Hospital intensive care unit between 2009 and 2011 were included in a retrospective follow-up study if surviving to discharge and were asked to return a questionnaire after 6 months. Data on patient demographics and pre-arrest quality of life were retrieved from medical records. Data are given as means (SD) or medians [Q(1), Q(3)]. We used logistic regression to identify factors associated with better quality of life after cardiac arrest.Results. Six months after cardiac arrest, 36% (79/222) were alive and 70% (55/79) of those patients completed the follow-up EuroQoL (EQ-5D) quality of life questionnaire. Median values for the EQ-5D before and after cardiac arrest were 0.89 [0.63, 1] and 0.89 [0.62, 1], respectively (P = 0.75). Only the EQ-5D prior to cardiac arrest was associated with better quality of life afterwards (OR 1.2; 95% CI 1.0-1.3; P = 0.02).Conclusions. Quality of life remained good after cardiac arrest especially in those patients who had good quality of life before cardiac arrest.
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| 3. |
- Hellevuo, H, et al.
(författare)
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The quality of manual chest compressions during transport : effect of the mattress assessed by dual accelerometers
- 2014
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Ingår i: Acta Anaesthesiologica Scandinavica. - : Wiley. - 0001-5172 .- 1399-6576. ; 58:3, s. 323-328
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUNDThe quality of cardiopulmonary resuscitation (CPR) has an impact on survival. The quality may be impaired if the patient needs to be transported to the hospital with ongoing CPR. The aim of this study was to analyse whether the quality of CPR can be improved during transportation by using real-time audiovisual feedback. In addition, we sought to evaluate the real compression depths taking into account the mattress and stretcher effect.METHODSParamedics (n = 24) performed standard CPR on a Resusci Anne Mannequin in a moving ambulance. Participants were instructed to perform CPR according to European Resuscitation Council Resuscitation guidelines 2010. Each pair acted as their own controls performing CPR first without and then with the feedback device. Compression depth, rate and no-flow fraction and also the mattress effect were recorded by using dual accelerometers by two Philips, HeartStart MRx Q-CPR defibrillators.RESULTSIn the feedback phase, the mean compression depth increased from 51 (10) to 56 (5) mm (P < 0.001), and the percentage of compression fractions with adequate depth was 60% vs. 89% (P < 0.001). However, taking account of the mattress effect, the real depth was only 41 (8) vs. 44 (5) mm without and with feedback, respectively (P < 0.001). The values for compression rate did not differ.CONCLUSIONSCPR quality was good during transportation in general. However, the results suggest that the feedback system improves CPR quality. Dual accelerometer measurements show, on the other hand, that the mattress effect may be a clinically relevant impediment to high quality CPR.
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| 4. |
- Kanth, R. K., et al.
(författare)
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Information and Communication System Technology's Impacts on Personalized and Pervasive Healthcare: A Technological Survey : A technological survey
- 2014
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Ingår i: 2014 IEEE Conference on Norbert Wiener in the 21st Century: Driving Technology’s Future, 21CW 2014 - Incorporating the Proceedings of the 2014 North American Fuzzy Information Processing Society Conference, NAFIPS 2014, Conference Proceedings.
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Konferensbidrag (refereegranskat)abstract
- This paper presents information and communication system technological development towards personalized and pervasive healthcare systems. In the recent years, information and communication technology has been providing an innovative health care solution to the society. With the massive increase in aging and stressed population, the health care solutions necessitate the use of more in-home monitoring and tracking system. In this paper, we have gathered the data from early 1970s to present date in terms of information and communication technology’s developments, use of wireless communication systems, and state-of-art of body area sensor network in personalized and pervasive health care. We have also put an effort to present our work in developing a robust, privacy compliant, accurate and cost-effective system that facilitates monitoring of patient status, patient activity and compliance with therapy. The proposed system will also be capable in developing patient-oriented services to support patient empowerment, self-care, adherence to care plans and treatment at the point of need.
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| 5. |
- Kanth, R. K., et al.
(författare)
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Insight into the requirements of self-aware, adaptive and reliable embedded sub-systems of satellite spacecraft
- 2011
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Ingår i: PECCS - Proc. Int. Conf. Pervasive Embedded Comput. Commun. Syst.. - 9789898425485 ; , s. 603-608
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Konferensbidrag (refereegranskat)abstract
- This position paper gives an insight for self-aware and adaptivity requirements of the sub-systems embedded in a satellite spacecraft. The most significant and considerable issues of self-aware and adaptive systems that are necessary in present and future on-board satellite spacecraft are illustrated in this paper. An attempt has been made to discuss several embedded sub-systems and space environment scenarios of the spacecraft. As a case study, an adaptive sierpinski based dual band antenna has been devised. The adaptive nature of this antenna provides a foundation of longer and more reliable mission life of a spacecraft. Through this paper it will be shown that adaptive, reconfigurable and reliability issues are the most prominent and potential area of research for outer space communication technology.
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| 6. |
- Khan, U. H., et al.
(författare)
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A novel asterisk-shaped circularly polarized RFID tag for on-metal applications
- 2016
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Ingår i: Applied Computational Electromagnetics Society Journal. - : Applied Computational Electromagnetics Society (ACES). - 1054-4887. ; 31:9, s. 1035-1042
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Tidskriftsartikel (refereegranskat)abstract
- An asterisk-shaped, metal-mountable RFID tag with a minuscule footprint is presented. The proposed design makes use of multiple asymmetric slots patterned in a cross-shaped fashion to achieve circular polarization. The structure is excited capacitively using a terminally-grounded, T-shaped feed line positioned within the slots. This peculiar arrangement permits the attainment of circular polarized radiation characteristics over a wide band of operation. Impedance matching, antenna size reduction and read range enhancement are the additional advantages offered by the embedded feed line. The final design is realized on a commercially available FR-4 substrate over dimensions of 40 x 40 mm2 yielding an impedance bandwidth and an axial ratio bandwidth of 37 MHz and 20 MHz, respectively. Improvement in antenna gain (and consequently in the read range) is reported upon mounting the tag on metallic surfaces.
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| 7. |
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| 8. |
- Perner, Anders, et al.
(författare)
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Hydroxyethyl Starch 130/0.4 versus Ringer's Acetate in Severe Sepsis
- 2012
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Ingår i: New England Journal of Medicine. - 0028-4793 .- 1533-4406. ; 367:2, s. 124-134
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND Hydroxyethyl starch (HES) 130/0.4 is widely used for fluid resuscitation in intensive care units (ICUs), but its safety and efficacy have not been established in patients with severe sepsis. METHODS In this multicenter, parallel-group, blinded trial, we randomly assigned patients with severe sepsis to fluid resuscitation in the ICU with either 6% HES 130/0.4 or Ringer's acetate at a dose of up to 33 ml per kilogram of ideal body weight per day. The primary outcome measure was either death or end-stage kidney failure (dependence on dialysis) at 90 days after randomization. RESULTS Of the 804 patients who underwent randomization, 798 were included in the modified intention-to-treat population. The two intervention groups had similar baseline characteristics. At 90 days after randomization, 201 of 398 patients (51%) assigned to HES 130/0.4 had died, as compared with 172 of 400 patients (43%) assigned to Ringer's acetate (relative risk, 1.17; 95% confidence interval [CI], 1.01 to 1.36; P=0.03); 1 patient in each group had end-stage kidney failure. In the 90-day period, 87 patients (22%) assigned to HES 130/0.4 were treated with renal-replacement therapy versus 65 patients (16%) assigned to Ringer's acetate (relative risk, 1.35; 95% CI, 1.01 to 1.80; P=0.04), and 38 patients (10%) and 25 patients (6%), respectively, had severe bleeding (relative risk, 1.52; 95% CI, 0.94 to 2.48; P=0.09). The results were supported by multivariate analyses, with adjustment for known risk factors for death or acute kidney injury at baseline. CONCLUSIONS Patients with severe sepsis assigned to fluid resuscitation with HES 130/0.4 had an increased risk of death at day 90 and were more likely to require renal-replacement therapy, as compared with those receiving Ringer's acetate.
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| 9. |
- Aslam, B., et al.
(författare)
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Miniaturized decoupled slotted patch RFID tag antennas for wearable health care
- 2017
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Ingår i: International Journal of RF and Microwave Computer-Aided Engineering. - : John Wiley & Sons. - 1096-4290 .- 1099-047X. ; 27:1
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Tidskriftsartikel (refereegranskat)abstract
- In this article, a couple of two-layered RFID tag antenna designs exhibiting improved performance descriptors for on-body applications are presented. The antennas are designed to operate in the microwave band (2.4–2.48 GHz) ensuring high data transmission rates ideal for real-time subject monitoring applications. The radiating element of both the antennas is a slotted patch structure provisioned with a pair of T-shaped slots realized on a commercial FR4 substrate. The augmentation of a systematic sequence of narrow comb-like etchings into the design enhances the impedance bandwidth considerably. A high permittivity silicon layer embedded with the radiating patch provides resilience from the human body dielectric losses. A modified antenna design utilizing patch miniaturization technique, resulting in an overall footprint reduction by 32%, is also proposed. The designed tag antennas offer a gain of more than 1.8 dBi and an attractive read range greater than 6.8 m in the operating band.
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| 10. |
- Ben Dhaou, I., et al.
(författare)
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Communication and security technologies for smart grid
- 2018
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Ingår i: Fog Computing: Breakthroughs in Research and Practice. - : IGI Global. - 9781522556503 - 1522556494 - 9781522556497 ; , s. 305-331
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- The smart grid is a new paradigm that aims to modernize the legacy power grid. It is based on the integration of ICT technologies, embedded system, sensors, renewable energy and advanced algorithms for management and optimization. The smart grid is a system of systems in which communication technology plays a vital role. Safe operations of the smart grid need a careful design of the communication protocols, cryptographic schemes, and computing technology. In this article, the authors describe current communication technologies, recently proposed algorithms, protocols, and architectures for securing smart grid communication network. They analyzed in a unifying approach the three principles pillars of smart-gird: Sensors, communication technologies, and security. Finally, the authors elaborate open issues in the smart-grid communication network.
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