Artur Petrosyan, М. В. Синкин, Mikhail Lebedev, Alexei Ossadtchi,
Objective.Brain-computer interfaces (BCIs) decode information from neural activity and send it to external devices. The use of Deep Learning approaches for decoding allows for automatic feature engineering within the specific decoding task. Physiologically plausible interpretation of the network parameters ensures the robustness of the learned decision rules and opens the exciting opportunity for automatic knowledge discovery.Approach.We describe a compact convolutional network-based architecture ...
Tópico(s): Neural Networks and Applications
2021 - IOP Publishing | Journal of Neural Engineering
Artur Petrosyan, Alexey Voskoboinikov, Dmitrii Sukhinin, Anna Makarova, Anastasia A. Skalnaya, Nastasia Arkhipova, М. В. Синкин, Alexei Ossadtchi,
Objective. Speech decoding, one of the most intriguing brain-computer interface applications, opens up plentiful opportunities from rehabilitation of patients to direct and seamless communication between human species. Typical solutions rely on invasive recordings with a large number of distributed electrodes implanted through craniotomy. Here we explored the possibility of creating speech prosthesis in a minimally invasive setting with a small number of spatially segregated intracranial electrodes. ...
Tópico(s): Neuroscience and Neural Engineering
2022 - IOP Publishing | Journal of Neural Engineering
Charles P. Egeland, Boris Gasparian, Dmitri Arakelyan, Chris Nicholson, Artur Petrosyan, Robert Ghukasyan, Ryan M. Byerly,
The southern Caucasus is a critical region for those interested in Palaeolithic research because of its varied topography and location at the crossroads of Europe, Africa, and Asia. Modern Armenia sits at the heart of this area, but has until now played a small role in broader debates, largely because of its paucity of well-excavated and well-dated sites. To improve this situation, a survey was conducted for Palaeolithic sites along the valley of the Debed River (Lori Depression, northeastern Armenia). ...
Tópico(s): Forensic Anthropology and Bioarchaeology Studies
2014 - Taylor & Francis | Journal of Field Archaeology
Alberto Salas, Juan Carlos de Carlos Vicente, Guillem Frontera Juan, Artur Sharluyan Petrosyan, Cristina M. Reina Ferragut, Amelia González Calvar, Maria del Carmen Clavero Rubio, Andrea Fernández de la Ballina,
The aim of this study was to evaluate the prognostic factors of patients admitted to a pediatric intensive care unit (PICU) after drowning.Retrospective observational study from January 1992 to December 2004 and prospective study from January 2005 to December 2015 were conducted in a tertiary children's hospital PICU. The data analyzed refer to the patient, event, type of resuscitation performed, and clinical situation after resuscitation and at arrival to the PICU; results of additional tests; and ...
Tópico(s): Neuroscience of respiration and sleep
2018 - Lippincott Williams & Wilkins | Pediatric Emergency Care
Artur Petrosyan, Hayk Azizbekyan, Boris Gasparyan, Roberto Dan, Արսեն Բոբոխյան, Mariam Amiryan,
Overview Daily data collection during archaeological fieldwork forms the basis for later interpretation and analysis. Across the world, we observe a wide variety of digital data collection methods and tools employed during fieldwork. Here, we detail the daily practices at four recent survey and excavation projects in the South Caucasian country of Armenia. As archaeology continues to become ever more digital, it is useful to consider these day-to-day recording processes at a typical field project. ...
Tópico(s): Archaeological Research and Protection
2021 - Cambridge University Press | Advances in Archaeological Practice
Jennifer Sherriff, Artur Petrosyan, Dominik Rogall, David Nora, Ellery Frahm, Tobias Lauer, Theodoros Karambaglidis, Monika Knul, Delphine Vettese, Dmitri Arakelyan, Shira Gur-Arieh, Paloma Vidal-Matutano, Jacob Morales, Helen Fewlass, Simon Blockley, Rhys Timms, Ani Adigyozalyan, Hayk Haydosyan, Phil Glauberman, Boris Gasparyan, Ariel Malinsky-Buller,
Archaeological and palaeoenvironmental evidence from the Armenian Highlands and wider southern Caucasus region emphasises the significance of Marine Oxygen Isotope Stage 3 (c. 57–29 ka) as a crucial period for understanding hominin behaviours amidst environmental fluctuations. Ararat-1 cave, situated in the Ararat Depression, Republic of Armenia, presents potential for resolving emerging key debates regarding hominin land use adaptations during this interval, due to its well-preserved lithic artefacts ...
Tópico(s): Archaeology and ancient environmental studies
2023 - Elsevier BV | Quaternary Science Advances
Shili Ge, Andy Pao, Ashley Vo, Nathan Deer, Artur Karasyov, Anna Petrosyan, Joseph Kahwaji, Marina Lukovsky, N. Chai, Angela Aguiluz, James Mirocha, Stanley C. Jordan, Mieko Toyoda,
Tópico(s): Immunodeficiency and Autoimmune Disorders
2010 - Elsevier BV | Transplant Immunology
M. V. Derdzyan, K. L. Hovhannesyan, A. V. Yeganyan, R. V. Sargsyan, Artur Novikov, A. G. Petrosyan, Christophe Dujardin,
Using a combination of experimental methods, the substitution tendencies of Li + and involved charge compensation mechanisms are determined and compared in two important similar scintillators, LuAG:Ce and YAG:Ce.
Tópico(s): Luminescence Properties of Advanced Materials
2018 - Royal Society of Chemistry | CrystEngComm
Elina Suviolahti, Anna Petrosyan, James Mirocha, Shili Ge, Artur Karasyov, David L. Thomas, Odette A. Galera, Washington Lim, Anne Maria Jimenez, L. Czer, George Chaux, Jeffrey De Leon, Andy Pao, Stanley C. Jordan, Mieko Toyoda,
Global immunosuppression can be measured by assessing adenosine triphospate (ATP) levels in mitogen-stimulated CD4+ T cells.We investigated the effect of storage time on ATP levels in 234 blood samples from 18 healthy individuals and 152 transplant patients. The difference between day 0 (<13 hours post-blood draw) and day 1 (24-37 hours) measurements was analyzed and compared with various factors; a subset of samples was also analyzed in 6-hour intervals.The ATP levels were significantly lower on day ...
Tópico(s): Transplantation: Methods and Outcomes
2012 - Wolters Kluwer | Transplantation
Artur Petrosyan, Mikhail Lebedev, Alexei Ossadtchi,
Tópico(s): Neural dynamics and brain function
2020 - Springer Nature | Studies in computational intelligence
R. L. Rogachev, S. V. Ivanova, A. V. Sergeev, Н. А. Кузнецов, K. B. Sargsyan, S. Kh. Eritsyan, V. S. Voskanyan, G. S. Petrosyan, Artur Antonyan,
Tópico(s): Advanced Data Processing Techniques
2013 - Pleiades Publishing | Thermal Engineering
Shili Ge, Artur Karasyov, Aditi Sinha, Anna Petrosyan, D. Lovato, David L. Thomas, Ashley Vo, Stan C. Jordan, Mieko Toyoda,
Desensitization with IVIG + rituximab combined with alemtuzumab induction gives HLA-sensitized patients an opportunity for successful kidney transplantation. However, it may be associated with a high risk for viral infections due to combined T cell and B cell depletion.Anti-cytomegalovirus (CMV) activity was assessed in 280 pretransplant and posttransplant blood samples from 33 desensitized patients who received alemtuzumab induction. CMV-specific CD8+ (CMV-Tc), CD4+ (CMV-Th) T cell activity, and natural ...
Tópico(s): T-cell and B-cell Immunology
2016 - Wolters Kluwer | Transplantation
K. L. Hovhannesyan, M. V. Derdzyan, Artur Novikov, A. G. Petrosyan, Christophe Dujardin,
Herein, optical‐quality single crystals of yttrium aluminum garnet (YAG):Ce,Ca,Li are grown by the vertical Bridgman method. Substitution and charge compensation mechanisms of Li + are considered based on optical absorption in as‐grown and γ‐ray‐irradiated single crystals and their luminescence decay and rise time under X‐ray excitation. The measurements are conducted on single crystals with impurity concentrations varying over a wide range. A suitable combination of Ca and Li concentration is able ...
Tópico(s): Terahertz technology and applications
2020 - Wiley | physica status solidi (b)
Alberto Salas, Guillem Frontera Juan, Artur Sharluyan Petrosyan, C. Eva, Joan Figuerola Mulet, Juan Carlos de Carlos Vicente,
Introduction Drowning is one of the most frequent accidents in children. We aimed to describe demographic and epidemiological characteristics of drowned children who required admission to a pediatric intensive care unit (PICU) to identify risk factors to guide possible preventive measures to avoid severe drowning. Methods We conducted an observational study for 29 years (retrospective between 1991 and 2004; prospective between 2005 and 2019) that included all children (0–15 years old) requiring PICU ...
Tópico(s): Neuroscience of respiration and sleep
2021 - Lippincott Williams & Wilkins | Pediatric Emergency Care
Narine Piliposyan, Hrachya Astsatryan, Zarmandukht Petrosyan, Artur Gevorgyan, Amalya Miisakyan, Hamlet Melkonyan, Vladimir Sahakyan, Rita Abrahamyan, Hayk Grigoryan,
Tópico(s): Flood Risk Assessment and Management
2023 - American Institute of Physics | AIP conference proceedings
Ellery Frahm, David Nora, Boris Gasparyan, Artur Petrosyan, Ariel Malinsky-Buller,
Tópico(s): Archaeology and ancient environmental studies
2025 - Elsevier BV | Quaternary Science Reviews
Tanner Z. Kovach, Artur Petrosyan, Keith Wilkinson, Yannick Raczynski-Henk, Kathleen Rodrigues, Ellery Frahm, Emily J. Beverly, Jayson Gill, Jennifer Sherriff, Boris Gasparyan, Հայկ Ավետիսյան, Artak Gnuni, D. Adler,
Tópico(s): Geology and Paleoclimatology Research
2025 - Elsevier BV | Journal of Human Evolution
Artur Petrosyan, Mikhail Lebedev, Alexei Ossadtchi,
Tópico(s): Neural dynamics and brain function
2020 - Springer Nature | Advances in intelligent systems and computing
Raffaele Biscione, Roberto Dan, Boris Gasparyan, Simon Hmayakyan, Artur Petrosyan,
L’articolo presenta 30 anni di archeologia italiana in Armenia, condotta dal CNR e dall’ISMEO. Le ricerche – ricognizioni di superficie e scavi – si sono concentrate sulla presenza in Armenia del regno di Urartu, il primo vero stato dell’area sud-caucasica, e sul suo retroterra culturale, l’Antica Età del Ferro. L’attività si è svolta nel bacino del lago Sevan e nelle regioni di Kotayk e Vayots Dzor. Sono stati studiati i sistemi di controllo del territorio, sia pre-urartei che urartei; le vie di transito; ...
Tópico(s): Ancient Mediterranean Archaeology and History
2024 - Firenze University Press | Bollettino della Società Geografica Italiana
Artur Petrosyan, Alexey Voskoboynikov, Natalia Slioussar, М. В. Синкин, Alexei Ossadtchi,
Attention is proposed to be a system of multiple functional networks, including alertness, orienting and executive control. A popular experimental paradigm for testing these networks and their interactions within a single design is the Attentional Networks Test (ANT) (Fan et al., 2002). The role of the oculomotor system in these various networks, however, has not been tested despite the strong link between attention and eye movements. We modified the executive control component of the manual response ...
Tópico(s): Speech Recognition and Synthesis
2021 - Elsevier BV | International Journal of Psychophysiology
Gurgen Harutyunyan, Varsenik Harutyunyan, Garnik Harutyunyan, Andrés Sánchez Gimeno, Artur Cherkezyan, Spartak Petrosyan, Anatoli Gnuni, Suren Soghomonyan,
The transformation of alveolar microcirculation to a peripheral circulation type in COVID-19 patients leads to important decreases in haemoglobin–oxygen affinity and provokes biochemical shunt https://bit.ly/3jE53pe
Tópico(s): Thermal Regulation in Medicine
2022 - European Respiratory Society | European Respiratory Review
M. V. Derdzyan, K. L. Hovhannesyan, Artur Novikov, E. Auffray, A. G. Petrosyan, Christophe Dujardin,
Optical absorption spectra measured in as‐grown and gamma‐ray irradiated un‐doped YAG, Li‐doped YAG, and Ca‐doped YAG single crystals are compared for characterization of effects introduced by impurities. The studies are conducted on single crystals grown by the vertical Bridgman method. Basing on the Li + incorporation mechanism, clarification is done regarding the optimal amounts of Li + for preparation of YAG:Li crystals with low concentration of anion vacancies and related defects giving rise to ...
Tópico(s): Radiation Detection and Scintillator Technologies
2019 - Wiley | physica status solidi (b)
Shili Ge, Artur Karasyov, A. Petrosyan, Jua Choi, D. Lovato, Joseph Kahwaji, J. Lluz, Ashley Vo, E. Hayrapetyan, Stanley C. Jordan, Mieko Toyoda,
Background: Belatacept-treated (Rx) pts are at high risk for viral infections and their complications. We also observed an increased rate of CMV viremia in kidney Tx pts with Belatacept-Rx. However, the infection was mild in sero (+) pts. Clearance of CMV infection depends on CMV-T and CMV-Ab levels in CMV sero (+) pts. CD28 co-signaling is not required for memory T cell activation, but accelerates the activation. CD28 expression on plasma cells was recently shown, suggesting a possible role in maintenance ...
Tópico(s): Systemic Lupus Erythematosus Research
2014 - Wolters Kluwer | Transplantation
Anahit Artashes Chubaryan ., Artur Khamisyan, Garik Petrosyan .,
Here we generalize the notions of determinative conjunct and strongly equal tautologies formany-valued logic (MVL) and compare the proof complexity measures of strongly equal many-valued tautologies in some proof systems of MVL. It is proved that in some “weak” proof system the strongly equal many-valued tautologies have the same proof complexities, while in the “strong” proof systems the measures of proof complexities for strongly equal tautologies can essentially differ from each other.
Tópico(s): Logic, Reasoning, and Knowledge
2019 - | Transactions on Machine Learning and Artificial Intelligence
A. A. Sargsyan, Artur Aleksanyan, Sahak Petrosyan, E. A. Gazazyan, A. Papoyan, Hrachya Astsatryan,
Tópico(s): Quantum optics and atomic interactions
2021 - Pleiades Publishing | Journal of Contemporary Physics (Armenian Academy of Sciences)
Gurgen Harutyunyan, Rosa I. Benítez Bermejo, Varsenik Harutyunyan, Garnik Harutyunyan, Andrés Sánchez Gimeno, Artur Cherkezyan, Spartak Petrosyan, Anatoli Gnuni, Suren Soghomonyan,
The ventilation–perfusion mismatch can9t explain the high P aCO 2 – P ETCO 2 gap in the setting of COVID-19 induced hypoxaemia and cannot be considered as the sole pathophysiological basis for the treatment in the early stage of COVID-19 https://bit.ly/3BKmGxJ
Tópico(s): COVID-19 Clinical Research Studies
2022 - European Respiratory Society | European Respiratory Review
K. L. Hovhannesyan, M. V. Derdzyan, I. A. Ghambaryan, Artur Novikov, V. É. Kisel, Alexander Rudenkov, Н. В. Кулешов, A. G. Petrosyan,
Tópico(s): Advanced Fiber Laser Technologies
2021 - Pleiades Publishing | Journal of Contemporary Physics (Armenian Academy of Sciences)
A. Matevosyan, G. Podosyan, Gegham Khandanyan, Artur Shukuryan, Parounak Zelveian,
... has a limited value for OSAHS diagnosis. Anna Petrosyan laboratory technician.
Tópico(s): Vascular Malformations and Hemangiomas
2013 - Elsevier BV | Sleep Medicine