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  • Publication . Part of book or chapter of book . 2000
    Authors: 
    Jerzy Urbanowicz; Kenneth S. Williams;
    Publisher: Springer Netherlands

    Our purpose in this chapter is to investigate divisibility properties of the values of L-functions attached to quadratic characters at integers, for example, class numbers and the orders of K 2-groups of the integers of quadratic fields. Making use of 2-adic L-functions we extend the linear congruence relations considered in the previous chapters. Extensions of this type have been considered in [Gras, 1989], [Uehara, 1990], [Urbanowicz and Wojcik, 1995/1996] and [Wojcik, 1998]. This chapter will focus on the results given in the latter three papers. We begin with some notation and basic properties of p-adic numbers and functions, especially p-adic L-functions.

  • Closed Access
    Authors: 
    Simon Bélanger; Veronica Bovenzi; Jérôme Côté; Witold Neugebauer; Muriel Amblard; Jean Martinez; Bernard Lammek; Martin Savard; Fernand Gobeil;
    Publisher: Elsevier BV

    The nonapeptide bradykinin (BK) is involved in the genesis of inflammation, edema and in pain mediation. As such, much effort has gone into the development of peptide/non-peptide antagonists to counteract these processes. However, there is an increasing awareness of the potential value of chemically stable BK agonists in the treatment of diabetes and cardiovascular diseases. In this study, a structure-activity relationship study of BK was performed to develop potent and stable peptide mimetics active at the human B2 receptors (hB2R). Twenty-three analogues were produced with substitutions at positions 1, 3, 5, 7, 8 and/or 9 of BK. In vitro binding (on transiently transfected HEK-293T cells) and biological activities (vasomotricity tests on human umbilical veins, MAPK assays on HEK-293T cells) of novel BK peptide derivatives at hB2R were determined alongside with previously reported synthetic agonists (e.g. RMP-7, JMV1609, FR190997). Some peptides were also tested in vivo in rats and rabbits using blood pressure assays. Two compounds, [Hyp(3), Thi(5), Cha(8)]-BK and [Hyp(3), Thi(5), (N)Chg(7), Thi(8)]-BK, exhibited equivalent (or even greater) in vitro affinities and potencies to BK at the naturally expressed and recombinant hB2R. Their potency and duration of action in vivo were highly superior to BK, thus inferring that they can withstand intravascular proteolysis. These novel compounds show promise as candidates for investigating the pharmacology of BK receptors and developing potential therapeutical applications.

  • Open Access
    Authors: 
    Morad Aaboud; Alexander Kupco; Stefan Schmitt; Ahmed Bassalat; Matej Melo; Marjorie Shapiro; Grigore Tarna; Till Eifert; Maximiliano Sioli; Nello Bruscino; +816 more
    Publisher: American Physical Society (APS)
    Project: NSERC

    A measurement of the associated production of a top-quark pair (tt) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1 fb-1 of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The ttZ and ttW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are σttZ=0.95±0.08stat±0.10syst pb and σttW=0.87±0.13stat±0.14syst pb in agreement with the Standard Model predictions. The measurement of the ttZ cross section is used to set constraints on effective field theory operators which modify the ttZ vertex.

  • Publication . Book . 2011
    Closed Access
    Authors: 
    James F. Peters; Andrzej Skowron; Hiroshi Sakai; Mihir K. Chakraborty; Dominik Slezak;
    Publisher: Springer Berlin Heidelberg
  • Open Access
    Authors: 
    Gregory J. Dore; Brian Conway; Yan Luo; Ewa Janczewska; Brygida Knysz; Y. Liu; Adrian Streinu-Cercel; Florin Alexandru Caruntu; Manuela Curescu; Richard Skoien; +16 more
    Publisher: Elsevier BV

    Background & AimsTelaprevir plus pegylated interferon/ribavirin (TPV+PegIFN/RBV) remains a therapeutic option for chronic hepatitis C virus (HCV) genotype (GT) 1 infection in many regions. We conducted two open-label, phase IIIb trials comparing safety and efficacy of all-oral ombitasvir/paritaprevir/ritonavir and dasabuvir±ribavirin (OBV/PTV/r+DSV±RBV) and TPV+PegIFN/RBV.MethodsTreatment-naïve (MALACHITE-I) or PegIFN/RBV-experienced (MALACHITE-II) non-cirrhotic, chronic HCV GT1-infected patients were randomized to OBV/PTV/r+DSV+weight-based RBV, OBV/PTV/r+DSV (treatment-naïve, GT1b-infected patients only), or 12weeks of TPV+PegIFN+weight-based RBV and 12–36 additional weeks of PegIFN/RBV. The primary endpoint was sustained virologic response 12weeks post-treatment (SVR12). Patient-reported outcome questionnaires evaluated mental and physical health during the studies.ResultsThree hundred eleven treatment-naïve and 148 treatment-experienced patients were randomized and dosed. Among treatment-naïve patients, SVR12 rates were 97% (67/69) and 82% (28/34), respectively, in OBV/PTV/r+DSV+RBV and TPV+PegIFN/RBV-treated GT1a-infected patients; SVR12 rates were 99% (83/84), 98% (81/83), and 78% (32/41) in OBV/PTV/r+DSV+RBV, OBV/PTV/r+DSV, and TPV+PegIFN/RBV-treated GT1b-infected patients. Among treatment-experienced patients, SVR12 rates were 99% (100/101) and 66% (31/47) with OBV/PTV/r+DSV+RBV and TPV+PegIFN/RBV. Mental and physical health were generally better with OBV/PTV/r+DSV±RBV than TPV+PegIFN/RBV. Rates of discontinuation due to adverse events (0–1% and 8–11%, respectively, p<0.05) and rates of hemoglobin decline to <10g/dl (0–4% and 34–47%, respectively, p<0.05) were lower for OBV/PTV/r+DSV±RBV than TPV+PegIFN/RBV.ConclusionsAmong non-cirrhotic, HCV GT1-infected patients, SVR12 rates were 97–99% with 12week, multi-targeted OBV/PTV/r+DSV±RBV regimens and 66–82% with 24–48 total weeks of TPV+PegIFN/RBV. OBV/PTV/r+DSV±RBV was associated with a generally better mental and physical health, more favorable tolerability, and lower rates of treatment discontinuation due to adverse events.

  • Open Access
    Authors: 
    Schellenberg, D; Armstrong Schellenberg, J R M; Mushi, A; Savigny de, D; Mgalula, L; Mbuya, C; Victoria, C.G.;
    Country: Tanzania (United Republic of)

    Objective was to document the prevalence, age-distribution, and risk factors for anaemia in Tanzanian children less than 5 years old,thereby assisting in the development of effective strategies for controlling anaemia. Cluster sampling was used to identify 2417 households at random from four contiguous districts in south-eastern United Republic of Tanzania in mid-1999. Data on various social and medical parameters were collected and analysed. Blood haemoglobin concentrations (Hb) were available for 1979 of the 2131 (93%) children identified and ranged from 1.7 to 18.6 g/dl. Overall, 87% (1722) of children had an Hb <11 g/dl, 39% (775) had an Hb <8 g/dl and 3% (65) had an Hb <5 g/dl. The highest prevalence of anaemia of all three levels was in children aged 6–11 months, of whom 10% (22/226) had an Hb <5 g/dl. However, the prevalence of anaemia was already high in children aged 1–5 months (85% had an Hb <11 g/dl, 42% had an Hb <8 g/dl, and 6% had an Hb <5 g/dl). Anaemia was usually asymptomatic and when symptoms arose they were nonspecific and rarely identified as a serious illness by the care provider. A recent history of treatment with antimalarials and iron was rare. Compliance with vaccinations delivered through the Expanded Programme of Immunization (EPI) was 82% and was notassociated with risk of anaemia. Anaemia is extremely common in south-eastern United Republic of Tanzania, even in very young infants. Further implementation of the Integrated Management of Childhood Illness algorithm should improve the case management of anaemia. However, the asymptomatic nature of most episodes of anaemia highlights the need for preventive strategies. The EPI has good coverage of the target population and it may be an appropriate channel for delivering tools for controlling anaemia and malaria.

  • Publication . Article . Other literature type . 2013
    Open Access English
    Authors: 
    Maimoona A. Zariwala; Heon Yung Gee; Małgorzata Kurkowiak; Dalal A. Al-Mutairi; Margaret W. Leigh; Toby W. Hurd; Rim Hjeij; Sharon D. Dell; Moumita Chaki; Gerard W. Dougherty; +48 more
    Countries: Croatia, France, Germany
    Project: WT , NIH | Novel genetics, pathobiol... (5R01DK068306-13), NIH | Colorado Clinical and Tra... (3UL1TR000154-05S1), NIH | Pathogenesis of PCD Lung ... (5R01HL071798-04), NIH | Identifying all Meckel-li... (1RC4DK090917-01), NIH | Genetic Disorder of Mucoc... (5U54HL096458-14)

    Defects of motile cilia cause primary ciliary dyskinesia (PCD), characterized by recurrent respiratory infections and male infertility. Using whole-exome resequencing and high-throughput mutation analysis, we identified recessive biallelic mutations in ZMYND10 in 14 families and mutations in the recently identified LRRC6 in 13 families. We show that ZMYND10 and LRRC6 interact and that certain ZMYND10 and LRRC6 mutations abrogate the interaction between the LRRC6 CS domain and the ZMYND10 C-terminal domain. Additionally, ZMYND10 and LRRC6 colocalize with the centriole markers SAS6 and PCM1. Mutations in ZMYND10 result in the absence of the axonemal protein components DNAH5 and DNALI1 from respiratory cilia. Animal models support the association between ZMYND10 and human PCD, given that zmynd10 knockdown in zebrafish caused ciliary paralysis leading to cystic kidneys and otolith defects and that knockdown in Xenopus interfered with ciliogenesis. Our findings suggest that a cytoplasmic protein complex containing ZMYND10 and LRRC6 is necessary for motile ciliary function. © 2013 The American Society of Human Genetics.

  • Publication . Article . Conference object . Preprint . 2017 . Embargo End Date: 01 Jan 2017
    Open Access
    Authors: 
    Ron Weiss; Jan Chorowski; Navdeep Jaitly; Yonghui Wu; Zhifeng Chen;
    Publisher: arXiv

    We present a recurrent encoder-decoder deep neural network architecture that directly translates speech in one language into text in another. The model does not explicitly transcribe the speech into text in the source language, nor does it require supervision from the ground truth source language transcription during training. We apply a slightly modified sequence-to-sequence with attention architecture that has previously been used for speech recognition and show that it can be repurposed for this more complex task, illustrating the power of attention-based models. A single model trained end-to-end obtains state-of-the-art performance on the Fisher Callhome Spanish-English speech translation task, outperforming a cascade of independently trained sequence-to-sequence speech recognition and machine translation models by 1.8 BLEU points on the Fisher test set. In addition, we find that making use of the training data in both languages by multi-task training sequence-to-sequence speech translation and recognition models with a shared encoder network can improve performance by a further 1.4 BLEU points. Comment: 5 pages, 1 figure. Interspeech 2017

  • Closed Access
    Authors: 
    Yingxu Wang; Svetlana Yanushkevich; Ming Hou; Konstantinos N. Plataniotis; Mark Coates; Marina L. Gavrilova; Yaoping Hu; Fakhri Karray; Henry Leung; Arash Mohammadi; +5 more
    Publisher: IEEE

    It is recognized that system trustworthiness is a hyperstructure embodied by the structural, behavioral, and system dimensions with a set of coherent attributes. We explore a theoretical framework of tripartite trustworthiness that can be applied to real-world autonomous systems. We present a formal study of the essences and mathematical models of system trustworthiness and their quantitative measurements in the contexts of autonomous and mission-critical intelligent systems where humans and machines interact in a hybrid environment.

  • Closed Access
    Authors: 
    Grzegorz Przybyła; Andrzej Szlęk; Dale Haggith; Andrzej Sobiesiak;
    Publisher: Elsevier BV

    Abstract The present paper summarizes results of experimental trails with the SI and HCCI engine fuelling with a producer gas substitute. Both engines are single cylinder units with similar displacement volume. In its original version, the HCCI engine used to be a three cylinder CI engine. Two of those cylinders were disabled when the engine was modified for the HCCI operation. The SI engine used in this was a component of commercially available generator. The engine original intake manifold and ignition system were rebuild for the purpose of this study. Engines were fuelled with the producer gas substitute that simulated real producer gas composition. The SI engine was charged with a stoichiometric air/fuel mixture, while the HCCI engine with a lean air/fuel mixture with equivalence ratio of 0.5. The main control variable in the SI engine operation was the spark timing. The initial air preheat temperature was the equivalent control variable in the HCCI engine trials. This paper reports on both engines indicated performance and combustion phasing parameters that were derived based on in-cylinder, cycle resolved pressure measurements.

search
Include:
The following results are related to Canada. Are you interested to view more results? Visit OpenAIRE - Explore.
11,447 Research products, page 1 of 1,145
  • Publication . Part of book or chapter of book . 2000
    Authors: 
    Jerzy Urbanowicz; Kenneth S. Williams;
    Publisher: Springer Netherlands

    Our purpose in this chapter is to investigate divisibility properties of the values of L-functions attached to quadratic characters at integers, for example, class numbers and the orders of K 2-groups of the integers of quadratic fields. Making use of 2-adic L-functions we extend the linear congruence relations considered in the previous chapters. Extensions of this type have been considered in [Gras, 1989], [Uehara, 1990], [Urbanowicz and Wojcik, 1995/1996] and [Wojcik, 1998]. This chapter will focus on the results given in the latter three papers. We begin with some notation and basic properties of p-adic numbers and functions, especially p-adic L-functions.

  • Closed Access
    Authors: 
    Simon Bélanger; Veronica Bovenzi; Jérôme Côté; Witold Neugebauer; Muriel Amblard; Jean Martinez; Bernard Lammek; Martin Savard; Fernand Gobeil;
    Publisher: Elsevier BV

    The nonapeptide bradykinin (BK) is involved in the genesis of inflammation, edema and in pain mediation. As such, much effort has gone into the development of peptide/non-peptide antagonists to counteract these processes. However, there is an increasing awareness of the potential value of chemically stable BK agonists in the treatment of diabetes and cardiovascular diseases. In this study, a structure-activity relationship study of BK was performed to develop potent and stable peptide mimetics active at the human B2 receptors (hB2R). Twenty-three analogues were produced with substitutions at positions 1, 3, 5, 7, 8 and/or 9 of BK. In vitro binding (on transiently transfected HEK-293T cells) and biological activities (vasomotricity tests on human umbilical veins, MAPK assays on HEK-293T cells) of novel BK peptide derivatives at hB2R were determined alongside with previously reported synthetic agonists (e.g. RMP-7, JMV1609, FR190997). Some peptides were also tested in vivo in rats and rabbits using blood pressure assays. Two compounds, [Hyp(3), Thi(5), Cha(8)]-BK and [Hyp(3), Thi(5), (N)Chg(7), Thi(8)]-BK, exhibited equivalent (or even greater) in vitro affinities and potencies to BK at the naturally expressed and recombinant hB2R. Their potency and duration of action in vivo were highly superior to BK, thus inferring that they can withstand intravascular proteolysis. These novel compounds show promise as candidates for investigating the pharmacology of BK receptors and developing potential therapeutical applications.

  • Open Access
    Authors: 
    Morad Aaboud; Alexander Kupco; Stefan Schmitt; Ahmed Bassalat; Matej Melo; Marjorie Shapiro; Grigore Tarna; Till Eifert; Maximiliano Sioli; Nello Bruscino; +816 more
    Publisher: American Physical Society (APS)
    Project: NSERC

    A measurement of the associated production of a top-quark pair (tt) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1 fb-1 of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The ttZ and ttW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are σttZ=0.95±0.08stat±0.10syst pb and σttW=0.87±0.13stat±0.14syst pb in agreement with the Standard Model predictions. The measurement of the ttZ cross section is used to set constraints on effective field theory operators which modify the ttZ vertex.

  • Publication . Book . 2011
    Closed Access
    Authors: 
    James F. Peters; Andrzej Skowron; Hiroshi Sakai; Mihir K. Chakraborty; Dominik Slezak;
    Publisher: Springer Berlin Heidelberg
  • Open Access
    Authors: 
    Gregory J. Dore; Brian Conway; Yan Luo; Ewa Janczewska; Brygida Knysz; Y. Liu; Adrian Streinu-Cercel; Florin Alexandru Caruntu; Manuela Curescu; Richard Skoien; +16 more
    Publisher: Elsevier BV

    Background & AimsTelaprevir plus pegylated interferon/ribavirin (TPV+PegIFN/RBV) remains a therapeutic option for chronic hepatitis C virus (HCV) genotype (GT) 1 infection in many regions. We conducted two open-label, phase IIIb trials comparing safety and efficacy of all-oral ombitasvir/paritaprevir/ritonavir and dasabuvir±ribavirin (OBV/PTV/r+DSV±RBV) and TPV+PegIFN/RBV.MethodsTreatment-naïve (MALACHITE-I) or PegIFN/RBV-experienced (MALACHITE-II) non-cirrhotic, chronic HCV GT1-infected patients were randomized to OBV/PTV/r+DSV+weight-based RBV, OBV/PTV/r+DSV (treatment-naïve, GT1b-infected patients only), or 12weeks of TPV+PegIFN+weight-based RBV and 12–36 additional weeks of PegIFN/RBV. The primary endpoint was sustained virologic response 12weeks post-treatment (SVR12). Patient-reported outcome questionnaires evaluated mental and physical health during the studies.ResultsThree hundred eleven treatment-naïve and 148 treatment-experienced patients were randomized and dosed. Among treatment-naïve patients, SVR12 rates were 97% (67/69) and 82% (28/34), respectively, in OBV/PTV/r+DSV+RBV and TPV+PegIFN/RBV-treated GT1a-infected patients; SVR12 rates were 99% (83/84), 98% (81/83), and 78% (32/41) in OBV/PTV/r+DSV+RBV, OBV/PTV/r+DSV, and TPV+PegIFN/RBV-treated GT1b-infected patients. Among treatment-experienced patients, SVR12 rates were 99% (100/101) and 66% (31/47) with OBV/PTV/r+DSV+RBV and TPV+PegIFN/RBV. Mental and physical health were generally better with OBV/PTV/r+DSV±RBV than TPV+PegIFN/RBV. Rates of discontinuation due to adverse events (0–1% and 8–11%, respectively, p<0.05) and rates of hemoglobin decline to <10g/dl (0–4% and 34–47%, respectively, p<0.05) were lower for OBV/PTV/r+DSV±RBV than TPV+PegIFN/RBV.ConclusionsAmong non-cirrhotic, HCV GT1-infected patients, SVR12 rates were 97–99% with 12week, multi-targeted OBV/PTV/r+DSV±RBV regimens and 66–82% with 24–48 total weeks of TPV+PegIFN/RBV. OBV/PTV/r+DSV±RBV was associated with a generally better mental and physical health, more favorable tolerability, and lower rates of treatment discontinuation due to adverse events.

  • Open Access
    Authors: 
    Schellenberg, D; Armstrong Schellenberg, J R M; Mushi, A; Savigny de, D; Mgalula, L; Mbuya, C; Victoria, C.G.;
    Country: Tanzania (United Republic of)

    Objective was to document the prevalence, age-distribution, and risk factors for anaemia in Tanzanian children less than 5 years old,thereby assisting in the development of effective strategies for controlling anaemia. Cluster sampling was used to identify 2417 households at random from four contiguous districts in south-eastern United Republic of Tanzania in mid-1999. Data on various social and medical parameters were collected and analysed. Blood haemoglobin concentrations (Hb) were available for 1979 of the 2131 (93%) children identified and ranged from 1.7 to 18.6 g/dl. Overall, 87% (1722) of children had an Hb <11 g/dl, 39% (775) had an Hb <8 g/dl and 3% (65) had an Hb <5 g/dl. The highest prevalence of anaemia of all three levels was in children aged 6–11 months, of whom 10% (22/226) had an Hb <5 g/dl. However, the prevalence of anaemia was already high in children aged 1–5 months (85% had an Hb <11 g/dl, 42% had an Hb <8 g/dl, and 6% had an Hb <5 g/dl). Anaemia was usually asymptomatic and when symptoms arose they were nonspecific and rarely identified as a serious illness by the care provider. A recent history of treatment with antimalarials and iron was rare. Compliance with vaccinations delivered through the Expanded Programme of Immunization (EPI) was 82% and was notassociated with risk of anaemia. Anaemia is extremely common in south-eastern United Republic of Tanzania, even in very young infants. Further implementation of the Integrated Management of Childhood Illness algorithm should improve the case management of anaemia. However, the asymptomatic nature of most episodes of anaemia highlights the need for preventive strategies. The EPI has good coverage of the target population and it may be an appropriate channel for delivering tools for controlling anaemia and malaria.

  • Publication . Article . Other literature type . 2013
    Open Access English
    Authors: 
    Maimoona A. Zariwala; Heon Yung Gee; Małgorzata Kurkowiak; Dalal A. Al-Mutairi; Margaret W. Leigh; Toby W. Hurd; Rim Hjeij; Sharon D. Dell; Moumita Chaki; Gerard W. Dougherty; +48 more
    Countries: Croatia, France, Germany
    Project: WT , NIH | Novel genetics, pathobiol... (5R01DK068306-13), NIH | Colorado Clinical and Tra... (3UL1TR000154-05S1), NIH | Pathogenesis of PCD Lung ... (5R01HL071798-04), NIH | Identifying all Meckel-li... (1RC4DK090917-01), NIH | Genetic Disorder of Mucoc... (5U54HL096458-14)

    Defects of motile cilia cause primary ciliary dyskinesia (PCD), characterized by recurrent respiratory infections and male infertility. Using whole-exome resequencing and high-throughput mutation analysis, we identified recessive biallelic mutations in ZMYND10 in 14 families and mutations in the recently identified LRRC6 in 13 families. We show that ZMYND10 and LRRC6 interact and that certain ZMYND10 and LRRC6 mutations abrogate the interaction between the LRRC6 CS domain and the ZMYND10 C-terminal domain. Additionally, ZMYND10 and LRRC6 colocalize with the centriole markers SAS6 and PCM1. Mutations in ZMYND10 result in the absence of the axonemal protein components DNAH5 and DNALI1 from respiratory cilia. Animal models support the association between ZMYND10 and human PCD, given that zmynd10 knockdown in zebrafish caused ciliary paralysis leading to cystic kidneys and otolith defects and that knockdown in Xenopus interfered with ciliogenesis. Our findings suggest that a cytoplasmic protein complex containing ZMYND10 and LRRC6 is necessary for motile ciliary function. © 2013 The American Society of Human Genetics.

  • Publication . Article . Conference object . Preprint . 2017 . Embargo End Date: 01 Jan 2017
    Open Access
    Authors: 
    Ron Weiss; Jan Chorowski; Navdeep Jaitly; Yonghui Wu; Zhifeng Chen;
    Publisher: arXiv

    We present a recurrent encoder-decoder deep neural network architecture that directly translates speech in one language into text in another. The model does not explicitly transcribe the speech into text in the source language, nor does it require supervision from the ground truth source language transcription during training. We apply a slightly modified sequence-to-sequence with attention architecture that has previously been used for speech recognition and show that it can be repurposed for this more complex task, illustrating the power of attention-based models. A single model trained end-to-end obtains state-of-the-art performance on the Fisher Callhome Spanish-English speech translation task, outperforming a cascade of independently trained sequence-to-sequence speech recognition and machine translation models by 1.8 BLEU points on the Fisher test set. In addition, we find that making use of the training data in both languages by multi-task training sequence-to-sequence speech translation and recognition models with a shared encoder network can improve performance by a further 1.4 BLEU points. Comment: 5 pages, 1 figure. Interspeech 2017

  • Closed Access
    Authors: 
    Yingxu Wang; Svetlana Yanushkevich; Ming Hou; Konstantinos N. Plataniotis; Mark Coates; Marina L. Gavrilova; Yaoping Hu; Fakhri Karray; Henry Leung; Arash Mohammadi; +5 more
    Publisher: IEEE

    It is recognized that system trustworthiness is a hyperstructure embodied by the structural, behavioral, and system dimensions with a set of coherent attributes. We explore a theoretical framework of tripartite trustworthiness that can be applied to real-world autonomous systems. We present a formal study of the essences and mathematical models of system trustworthiness and their quantitative measurements in the contexts of autonomous and mission-critical intelligent systems where humans and machines interact in a hybrid environment.

  • Closed Access
    Authors: 
    Grzegorz Przybyła; Andrzej Szlęk; Dale Haggith; Andrzej Sobiesiak;
    Publisher: Elsevier BV

    Abstract The present paper summarizes results of experimental trails with the SI and HCCI engine fuelling with a producer gas substitute. Both engines are single cylinder units with similar displacement volume. In its original version, the HCCI engine used to be a three cylinder CI engine. Two of those cylinders were disabled when the engine was modified for the HCCI operation. The SI engine used in this was a component of commercially available generator. The engine original intake manifold and ignition system were rebuild for the purpose of this study. Engines were fuelled with the producer gas substitute that simulated real producer gas composition. The SI engine was charged with a stoichiometric air/fuel mixture, while the HCCI engine with a lean air/fuel mixture with equivalence ratio of 0.5. The main control variable in the SI engine operation was the spark timing. The initial air preheat temperature was the equivalent control variable in the HCCI engine trials. This paper reports on both engines indicated performance and combustion phasing parameters that were derived based on in-cylinder, cycle resolved pressure measurements.