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Your search keyword '"Dinyari P"' showing total 6 results
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6 results on '"Dinyari P"'

1. Learning to Play by Imitating Humans

Author

Dinyari, Rostam, Sermanet, Pierre, and Lynch, Corey

Subjects
Computer Science - Robotics, Computer Science - Artificial Intelligence, Computer Science - Machine Learning, Electrical Engineering and Systems Science - Systems and Control
Abstract

Acquiring multiple skills has commonly involved collecting a large number of expert demonstrations per task or engineering custom reward functions. Recently it has been shown that it is possible to acquire a diverse set of skills by self-supervising control on top of human teleoperated play data. Play is rich in state space coverage and a policy trained on this data can generalize to specific tasks at test time outperforming policies trained on individual expert task demonstrations. In this work, we explore the question of whether robots can learn to play to autonomously generate play data that can ultimately enhance performance. By training a behavioral cloning policy on a relatively small quantity of human play, we autonomously generate a large quantity of cloned play data that can be used as additional training. We demonstrate that a general purpose goal-conditioned policy trained on this augmented dataset substantially outperforms one trained only with the original human data on 18 difficult user-specified manipulation tasks in a simulated robotic tabletop environment. A video example of a robot imitating human play can be seen here: https://learning-to-play.github.io/videos/undirected_play1.mp4

Published
2020

2. Nuclear-spin-dependent coherent population trapping of single nitrogen vacancy centers in diamond

Author

Golter, D. Andrew, Dinyari, Khodadad N., and Wang, Hailin

Subjects
Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Atomic Physics
Abstract

Coherent population trapping (CPT) provides a highly sensitive means for probing the energy level structure of an atomic system. For a nitrogen vacancy center in diamond, the CPT offers an alternative to the standard optically-detected magnetic resonance method for measuring the hyperfine structure of the electronic ground states. We show that the nuclear spin dependent CPT measures directly the hyperfine splitting of these states due to the 14N nuclear spin. The CPT spectral response obtained in the presence of a strong microwave field, resonant or nearly resonant with a ground state spin transition, maps out the dynamic Stark splitting induced by the coherent spin excitation.

Published
2013
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4. Impairment of the Fibrinolytic System is Present and is a Marker for Endothelial Dysfunction in Adolescents after Kawasaki Disease

Author

McCrindle, Brian W, Albisetti, Manuela, Chan, Anthony KC, Wong, Derek, Vegh, Patricia, Adams, Margaret, Dinyari, Maria, Monagle, Paul, and Andrew, Maureen

Abstract

Impairment of the fibrinolytic system is one of the most sensitive markers of endothelial dysfunction, and a major risk factor for future cardiovascular disease in adults. Persistent endothelial dysfunction, which is an early pathophysiological event in atherogenesis, occurs in some patients following Kawasaki disease (KD). The aim of this study was to assess whether impaired fibrinolysis is present in long-term survivors of KD. The study included 42 children with a documented history of KD presenting without coronary lesions (n = 22), with resolved coronary aneurysms (n = 13), or with persistent giant aneurysms (n = 7), and 26 healthy age-matched teenagers as controls. Blood samples were collected from all patients and controls prior to and following venous occlusion (VO) stress testing, and assayed for tissue plasminogen activator (tPA), plasminogen activator inhibitor (PAI)-1, plasminogen, alpha2-antiplasmin (a2-AP), alpha2-macroglobulin (a2-M), D-Dimer, fibrinogen, and von Willebrand factor (vWF). Significantly decreased fibrinolytic activity following VO was detected in patients compared to controls due to decreased tPA antigen, and increased PAI-1 activity. In addition, patients had significantly increased plasma concentrations of plasminogen and fibrinogen, which were related to similar increases of a2-M compared to controls. Decreased fibrinolytic activity was found in patients with coronary aneurysms but also in those without coronary lesions. In summary, a decreased fibrinolytic activity reflects persistent endothelial damage following acute KD, potentially predisposing these patients to accelerated atherosclerosis and cardiovascular disease in early adult life.

Published
2003
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5. Purified Human Pancreatic Islets, CIT Culture Media with Lisofylline or Exenatide.

Author

Ansite J, Balamurugan AN, Barbaro B, Battle J, Brandhorst D, Cano J, Chen X, Deng S, Feddersen D, Friberg A, Gilmore T, Goldstein JS, Holbrook E, Khan A, Kin T, Lei J, Linetsky E, Liu C, Luo X, McElvaney K, Min Z, Moreno J, O'Gorman D, Papas KK, Putz G, Ricordi C, Szot G, Templeton T, Wang L, Wilhelm JJ, Willits J, Wilson T, Zhang X, Avila J, Begley B, Cano J, Carpentier S, Holbrook E, Hutchinson J, Larsen CP, Moreno J, Sears M, Turgeon NA, Webster D, Deng S, Lei J, Markmann JF, Bridges ND, Czarniecki CW, Goldstein JS, Putz G, Templeton T, Wilson T, Eggerman TL, Al-Saden P, Battle J, Chen X, Hecyk A, Kissler H, Luo X, Molitch M, Monson N, Stuart E, Wallia A, Wang L, Wang S, Zhang X, Bigam D, Campbell P, Dinyari P, Kin T, Kneteman N, Lyon J, Malcolm A, O'Gorman D, Onderka C, Owen R, Pawlick R, Richer B, Rosichuk S, Sarman D, Schroeder A, Senior PA, Shapiro AMJ, Toth L, Toth V, Zhai W, Johnson K, McElroy J, Posselt AM, Ramos M, Rojas T, Stock PG, Szot G, Barbaro B, Martellotto J, Oberholzer J, Qi M, Wang Y, Bayman L, Chaloner K, Clarke W, Dillon JS, Diltz C, Doelle GC, Ecklund D, Feddersen D, Foster E, Hunsicker LG, Jasperson C, Lafontant DE, McElvaney K, Neill-Hudson T, Nollen D, Qidwai J, Riss H, Schwieger T, Willits J, Yankey J, Alejandro R, Corrales AC, Faradji R, Froud T, Garcia AA, Herrada E, Ichii H, Inverardi L, Kenyon N, Khan A, Linetsky E, Montelongo J, Peixoto E, Peterson K, Ricordi C, Szust J, Wang X, Abdulla MH, Ansite J, Balamurugan AN, Bellin MD, Brandenburg M, Gilmore T, Harmon JV, Hering BJ, Kandaswamy R, Loganathan G, Mueller K, Papas KK, Pedersen J, Wilhelm JJ, Witson J, Dalton-Bakes C, Fu H, Kamoun M, Kearns J, Li Y, Liu C, Luning-Prak E, Luo Y, Markmann E, Min Z, Naji A, Palanjian M, Rickels M, Shlansky-Goldberg R, Vivek K, Ziaie AS, Fernandez L, Kaufman DB, Zitur L, Brandhorst D, Friberg A, and Korsgren O

Published
2017

6. Effect of different induction strategies on effector, regulatory and memory lymphocyte sub-populations in clinical islet transplantation.

Author

Toso C, Edgar R, Pawlick R, Emamaullee J, Merani S, Dinyari P, Mueller TF, Shapiro AM, and Anderson CC

Subjects
Alemtuzumab, Antibodies, Monoclonal, Humanized, Antilymphocyte Serum, Daclizumab, Female, Flow Cytometry, Humans, Male, Middle Aged, Prospective Studies, Antibodies, Monoclonal pharmacology, Antibodies, Neoplasm pharmacology, Immunoglobulin G pharmacology, Immunosuppressive Agents pharmacology, Islets of Langerhans Transplantation immunology, Lymphocyte Subsets drug effects, Lymphocyte Subsets immunology
Abstract

This prospective study assessed lymphocyte subsets in the peripheral blood of 42 islet allograft recipients using flow cytometry from 2 weeks and up to 2 years post-transplantation. Subjects received daclizumab (n = 16), Thymoglobulin (n = 12) or alemtuzumab (n = 14). Alemtuzumab was associated with an early (within 1 month) and transient (up to 6 months) increase in the frequency of CD3(+) CD4(+) Foxp3(+) T cells, while daclizumab induced a near complete loss of these cells (P

Published
2009
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