Vision-based motion analysis of a kitesurfer

Kitesurfing is a relatively recent phenomenon with raising popularity worldwide – a recently developed extreme water sport considered a high-risk injury sport. It combines elements of several other sports, in particular sailing, surfing, windsurfing, wakeboarding, and snowboarding. The main purpose of authors’ research in the present paper is to use a vision system technique for measuring a kitesurfer’s body movements in order to analyze group of activated muscles during take-off and handle pass maneuver reproduced in the laboratory conditions

Brief Announcement: Communication-Efficient BFT Using Small Trusted Hardware to Tolerate Minority Corruption

Small trusted hardware primitives can improve fault tolerance of Byzantine Fault Tolerant (BFT) protocols to one-half faults. However, existing works achieve this at the cost of increased communication complexity. In this work, we explore the design of communication-efficient BFT protocols that can boost fault tolerance to one-half without worsening communication complexity. Our results include a version of HotStuff that retains linear communication complexity in each view and a version of the VABA protocol with quadratic communication, both leveraging trusted hardware to tolerate a minority of corruptions. As a building block, we present communication-efficient provable broadcast, a core broadcast primitive with increased fault tolerance. Our results use expander graphs to achieve efficient communication in a manner that may be of independent interest

Time trends of chest pain symptoms and health related quality of life in coronary artery disease

BACKGROUND: There is at present a lack of knowledge of time trends in health related quality of life (HRQL) in common patients with coronary artery disease (CAD) treated in ordinary care. The objective of this study is to assess and compare time trends of health related quality of life (HRQL) and chest pain in patients with coronary artery disease. METHODS: 253 consecutive CAD patients in Stockholm County, Sweden – 197 males/56 females; 60 ± 8 years – were followed during two years. Perceived chest pain symptoms and three global assessments of HRQL were assessed at baseline, after one and after two years. EuroQol-5 dimension (EQ-5D) with a predefined focus on function and symptoms; the broader tapping global estimates of HRQL; EuroQol VAS (EQ-VAS) and Cardiac Health Profile (CHP) were used. Chest pain was ranked according to Canadian Cardiovascular Society (CCS). Change in HRQL was analysed by a repeated measurements ANOVA and chest pain symptoms were analysed by Friedman non-parametric ANOVA. RESULTS: Perceived chest pain decreased during the two years (p < 0.00022); CCS 0: 41–51%; CCS 1: 19–15%; CCS 2: 31–27%; CCS 3: 5–4% and CCS 4: 4–2%. By contrast, HRQL did not change: EQ-5D: 0.76 (CI 0.73–0.79) -0.78 (CI 0.75–0.81), EQ-VAS: 0.68 (CI 0.66–0.71)-0.68 (CI 0.65–0.71) and CHP: 0.66 (CI 0.64–0.69) -0.66 (CI 0.64–0.69). CONCLUSION: HRQL did not increase despite a reduction in the severity of chest pain during two years. This implies that the major part of HRQL in these consecutive ordinary patients with CAD is unresponsive to change in chest pain symptoms

Capacidade funcional e qualidade de vida de adultos e idosos com feridas crônicas

Introdução: As feridas crônicas afetam a população em geral e comprometem negativamente a qualidade de vida e geram impactos biopsicossociais. Objetivo: Analisar a associação entre a capacidade funcional e a qualidade de vida de adultos e idosos com feridas crônicas. Métodos: Estudo transversal com 135 acometidas por feridas crônicas cadastradas nos serviços de atenção primária à saúde de um município de Minas Gerais, Brasil. Para a coleta dedados realizada no período de 2017 a 2018, utilizaram-se os instrumentos i) Cardiff Wound Impact Schedule que foi traduzido, adaptado culturalmente e validado para a língua portuguesa do Brasil; ii) Índice de Katz e iii) questionáriosociodemográfico com informações sobre o perfil de saúde/doença e características das feridas. Resultados: Houve predomínio de participantes do sexo feminino (59,3%), com idade acima de 60 anos (70,4%) e até 4 anos de estudo (72,6%). No questionário Cardiff Wound Impact Schedule, o domínio com menor pontuação foi o debem-estar (média 45,6 ± 18,2). Na avaliação da funcionalidade realizada por meio do Índice de Katz, destaca-se que 30 (22,2%) pessoas foram consideradas dependentes para tomar banho e 33 (24,4%) necessitavam de ajuda para se locomover. Houve associação estatisticamente significativa entre as seguintes variáveis independentes do Índice de Katz e do Cardiff Wound Impact Schedule para “vida social” e “banho”, “vida social” e “vestir-se”, “vidasocial” e “higiene pessoal”, “vida social” e “locomoção”, “vida social” e “alimentação”, “sintomas físicos e vida diária” e “vestir-se”, “bem-estar” e “continência”. Conclusão: A incapacidade funcional está associada à diminuição da qualidade de vida de adultos e idosos com feridas crônicas.Introduction. Wounds affect the general population and negatively compromise the quality of life and generate biopsychosocial impacts. Objective. Analyze the association between functional capacity and quality of life in adults and elderly people with chronic wounds. Methods. Cross-sectional study with 135 people with chronic wounds registered in the primary health care services of a municipality in Minas Gerais, Brazil. For data collection carriedout from 2017 to 2018, the following were used: i) Cardiff Wound Impact Schedule, which was translated, culturally adapted and validated for the Brazilian Portuguese language; ii) Katz Index and iii) a sociodemographic questionnaire with information about the health/illness profile and injury characteristics. Results. There was a predominanceof female participants (59.3%), aged over 60 years (70.4%), and until 4 years of study (72.6%). In the Cardiff Wound Impact Schedule questionnaire, the domain with the lowest score was well-being (mean 45.6 ± 18.2). In the evaluation of functionality using the Katz Index, 30 (22.2%) people were considered dependent on bathing and 33 (24.4%) needed help to get around. There was a statistically significant association between the following independent variables of the Katz Index and Cardiff Wound Impact Schedule for “social life” and “bathing”, “sociallife” and “dressing”, “social life” and “personal hygiene”, “social life” and “locomotion”, “social life” and “feeding”, “physical symptoms and daily life” and “dressing”, “well-being” and “continence”. Conclusions. Functional disability is associated with decreased quality of life in adults and elderly people with chronic wounds

Återhämtning under arbetsdagen – : en inspirationsbok för individ och verksamhet

En inspirationsbok med verktyg för att främja återhämtning under arbetsdagen – både för individ och verksamhet

Combined Scheduling of Time-Triggered Plans and Priority Scheduled Task Sets

© Owner/Author (2016). This is the author's version of the work. It is posted here for your personal use. Not for redistribution. The definitive Version of Record was published in ACM SIGAda Ada Letters, 36(1), 68-76, http://dx.doi.org/10.1145/10.1145/2971571.2971580.[EN] Preemptive, priority-based scheduling on the one hand, and time-triggered scheduling on the other, are the two major techniques in use for development of real-time and embedded software. Both have their advantages and drawbacks with respect to the other, and are commonly adopted in mutual exclusion. In a previous paper, we proposed a software architecture that enables the combined and controlled execution of time-triggered plans and priority-scheduled tasks. The goal was to take advantage of the best of both approaches by providing deterministic, jitter-controlled execution of time-triggered tasks (e.g., control tasks), coexisting with a set of priority-scheduled tasks, with less demanding jitter requirements. In this paper, we briefly describe the approach, in which the time-triggered plan is executed at the highest priority level, controlled by scheduling decisions taken only at particular points in time, signalled by recurrent timing events. The rest of priority levels are used by a set of concurrent tasks scheduled by static or dynamic priorities. We also discuss several open issues such as schedulability analysis, use of the approach in multiprocessor architectures, usability in mixed-criticality systems and needed changes to make this approach Ravenscar compliant.This work has been partly supported by the Spanish Government’s project M2C2 (TIN2014-56158-C4-1-P-AR) and the European Commission’s project EMC2 (ARTEMIS-JU Call 2013 AIPP-5, Contract 621429).Real Sáez, JV.; Sáez Barona, S.; Crespo Lorente, A. (2016). Combined Scheduling of Time-Triggered Plans and Priority Scheduled Task Sets. Ada Letters. 36(1):68-76. https://doi.org/10.1145/2971571.2971580S6876361T. P. Baker and A. Shaw. The cyclic executive model and Ada. In Proceedings IEEE Real Time Systems Symposium 1988, Huntsville, Alabama, pages 120--129, 1988.P. Balbastre, I. Ripoll, J. Vidal, and A. Crespo. A Task Model to Reduce Control Delays. Real-Time Systems, 27(3):215--236, September 2004.A. Burns and R. Davis. Mixed Criticality Systems - A Review. Technical report, Depatment of Computer Science, University of York, 2013.A. Cervin. Integrated Control and Real-Time Scheduling. PhD thesis, Lund Institute of Technology, April 2003.R. Dobrin. Combining Offline Schedule Construction and Fixed Priority Scheduling in Real-Time Computer Systems. PhD thesis, M&#228;lardalen University, 2005.S. Hong, X. Hu, and M. Lemmon. Reducing Delay Jitter of Real-Time Control Tasks through Adaptive Deadline Adjustments. In IEEE Computer Society, editor, 22nd Euromicro Conference on Real-Time Systems -- ECRTS, pages 229--238, 2010.J. W. S. Liu. Real-Time Systems. Prentice-Hall Inc., 2000.J. Palencia and M. Gonz&#225;lez-Harbour. Schedulability Analysis for Tasks with Static and Dynamic Offsets. In 9th IEEE Real-Time Systems Symposium, 1998.M. J. Pont. The Engineering of Reliable Embedded Systems: LPC1769 edition. Number ISBN: 978-0-9930355-0-0. SafeTTy Systems Limited, 2014.J. Real and A. Crespo. Incorporating Operating Modes to an Ada Real-Time Framework. Ada Letters, 30(1):73--85, April 2010.J. Real, S. S&#225;ez, and A. Crespo. Combining time-triggered plans with priority scheduled task sets. In M. Bertogna and L. M. Pinho, editors, Reliable Software Technologies -- Ada-Europe 2016, volume 9695 of Lecture Notes in Computer Science. Springer, June 2016.S. S&#225;ez, J. Real, and A. Crespo. An integrated framework for multiprocessor, multimoded real-time applications. In M. Brorsson and L. Pinho, editors, Reliable Software Technologies -- Ada-Europe 2012, volume 7308, pages 18--34. Springer-Verlag, June 2012.S. S&#225;ez, J. Real, and A. Crespo. Implementation of Timing-Event Anities in Ada/Linux. Ada Letters, 35(1), April 2015.A. J. Wellings and A. Burns. A Framework for Real-Time Utilities for Ada 2005. Ada Letters, XXVII(2), August 2007