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19 results on '"Johnson, Adam B."'

1. High-Spectral Resolution Dark Holes: Concept, Results, and Promise

Author

Thompson, William, Johnson, Adam B., Marois, Christian, Lardière, Olivier, Grandmont, Frédéric, Hardy, Tim, Caputa, Kris, Bradley, Colin, and Singh, Garima

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Next generation high contrast imaging instruments face a challenging trade off: they will be required to deliver data with high spectral resolution at a relatively fast cadence (minutes) and across a wide field of view (arcseconds). For instruments that employ focal plane wavefront sensing and therefore require super-Nyquist sampling, these requirements cannot simultaneously be met with a traditional lenslet integral field spectrograph (IFU). For the SPIDERS pathfinder instrument, we are demonstrating an imaging Fourier transform spectrograph (IFTS) that offers a different set of tradeoffs than a lenslet IFU, delivering up to R20,000 spectral resolution across a dark hole. We present preliminary results from the SPIDERS IFTS including a chromaticity analysis of its dark hole and demonstrate a spectral differential imaging (SDI) improvement of up to 40 $\times$, and a first application of spectro-coherent differential imaging, combining both coherent differential imaging (CDI) and SDI., Comment: Submitted to the proceedings of adaptive optics for extremely large telescopes 7

Published
2023

4. A SmallSat mission study for STARLITE: superluminous tomographic atmospheric reconstruction with laser-beacons for imaging terrestrial exoplanets

Author

Coyle, Laura E., Matsuura, Shuji, Perrin, Marshall D., Johnson, Adam B., Padres, Ashley, Hughes, Ryan, Buonagura, Carmine, Chapman, Zane, Kubas, Alexia, Hegelein, Veronica, Mishra, Ishan, Smith, Adler, Tahsin, Abu Taqui Md, Parashar, Akshiti, Bendimerad, Rafid, Chen, Deemo, Lu, Qizhi, Kounios, Asterios Aidan, Desilva, Devin, Padres, Verena, Lloyd, Jamie, Savransky, Dmitry, Umansky-Castro, Joshua, van Paridon, Andrew, and Petro, Elaine

Published
2024
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5. The First Hybrid International Educational Comprehensive Cleft Care Workshop

Author

Kantar, Rami S., Esenlik, Elçin, Al Abyad, Omar S., Melhem, Antonio, Younan, Robert A., Haddad, Mario, Keith, Kristen, Kassam, Serena, Annan, Beyhan, Vijayakumar, Charanya, Picard, Arnaud, Padwa, Bonnie L., Sommerlad, Brian, Raposo-Amaral, Cassio Eduardo, Forrest, Christopher R., Gillett, David A., Steinbacher, Derek M., Runyan, Christopher M., Tanikawa, Daniela Y. S., Chong, David K., Fisher, David M., Mark, Hans, Canter, Halil Ibrahim, Losee, Joseph E., Patel, Krishna G., Hartzell, Larry D., Johnson, Adam B., Collares, Marcus Vinícius Martins, Alonso, Nivaldo, Chen, Philip Kuo-Ting, Tse, Raymond, Mann, Robert J., Prada-Madrid, Jose Rolando, Kobayashi, Shinji, Hussain, Syed Altaf, Kummer, Ann, Sell, Debbie A., Pereira, Valerie J., Mabry, Kelly, Gonsoulin, Courtney K., Persson, Martin, Davies, Gareth, Sethna, Navil F., Munoz-Pareja, Jennifer C., Kuijpers-Jagtman, Anne Marie, Grayson, Barry H., Grollemund, Bruno, Garib, Daniela G., Meazzini, Maria Costanza, Kharbanda, Om P., Santiago, Pedro E., Nalabothu, Prasad, Batra, Puneet, Stieber, Erin, Prasad, Dushyant, Brewster, Hugh, Ayala, Ruben, Erbay, Elif, Akcam, M. Okan, Don Griot, J. Peter W., Vyas, Raj M., Flores, Roberto L, Breugem, Corstiaan C., and Hamdan, Usama S.

Abstract

Objective Describe the first hybrid global simulation-based comprehensive cleft care workshop, evaluate impact on participants, and compare experiences based on in-person versus virtual attendance.Design Cross-sectional survey-based evaluation.Setting International comprehensive cleft care workshop.Participants Total of 489 participants.Interventions Three-day simulation-based hybrid comprehensive cleft care workshop.Main Outcome Measures Participant demographic data, perceived barriers and interventions needed for global comprehensive cleft care delivery, participant workshop satisfaction, and perceived short-term impact on practice stratified by in-person versus virtual attendance.Results The workshop included 489 participants from 5 continents. The response rate was 39.9%. Participants perceived financial factors (30.3%) the most significant barrier and improvement in training (39.8%) as the most important intervention to overcome barriers facing cleft care delivery in low to middle-income countries. All participants reported a high level of satisfaction with the workshop and a strong positive perceived short-term impact on their practice. Importantly, while this was true for both in-person and virtual attendees, in-person attendees reported a significantly higher satisfaction with the workshop (28.63 ± 3.08 vs 27.63 ± 3.93; P= .04) and perceived impact on their clinical practice (22.37 ± 3.42 vs 21.02 ± 3.45 P= .01).Conclusion Hybrid simulation-based educational comprehensive cleft care workshops are overall well received by participants and have a positive perceived impact on their clinical practices. In-person attendance is associated with significantly higher satisfaction and perceived impact on practice. Considering that financial and health constraints may limit live meeting attendance, future efforts will focus on making in-person and virtual attendance more comparable.

Published
2023
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9. Deployment of focal plane WFS technologies on 8-m telescopes: from the Subaru SPIDERS pathfinder, to the facility-class GPI 2.0 CAL2 system

Author

Marois, Christian, primary, Lardière, Olivier, additional, Thompson, William R., additional, Singh, Garima, additional, Johnson, Adam B., additional, Hardy, Tim, additional, Fitzsimmons, Joeleff, additional, Gerard, Benjamin L., additional, Sivanandam, Suresh, additional, Thibault, Simon, additional, Savransky, Dmitry, additional, Bradley, Colin, additional, Jensen-Clem, Rebecca M., additional, Demers, Mathieu, additional, Fu, Qiang, additional, Heidrich, Wolfgang, additional, and N'Diaye, Mamadou, additional

Published
2022
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11. The First Hybrid International Educational Comprehensive Cleft Care Workshop

Author

Kantar, Rami S., primary, Esenlik, Elçin, additional, Al Abyad, Omar S., additional, Melhem, Antonio, additional, Younan, Robert A., additional, Haddad, Mario, additional, Keith, Kristen, additional, Kassam, Serena, additional, Annan, Beyhan, additional, Vijayakumar, Charanya, additional, Picard, Arnaud, additional, Padwa, Bonnie L., additional, Sommerlad, Brian, additional, Raposo-Amaral, Cassio Eduardo, additional, Forrest, Christopher R., additional, Gillett, David A., additional, Steinbacher, Derek M., additional, Runyan, Christopher M., additional, Tanikawa, Daniela Y. S., additional, Chong, David K., additional, Fisher, David M., additional, Mark, Hans, additional, Canter, Halil Ibrahim, additional, Losee, Joseph E., additional, Patel, Krishna G., additional, Hartzell, Larry D., additional, Johnson, Adam B., additional, Collares, Marcus Vinícius Martins, additional, Alonso, Nivaldo, additional, Chen, Philip Kuo-Ting, additional, Tse, Raymond, additional, Mann, Robert J., additional, Prada-Madrid, Jose Rolando, additional, Kobayashi, Shinji, additional, Hussain, Syed Altaf, additional, Kummer, Ann, additional, Sell, Debbie A., additional, Pereira, Valerie J., additional, Mabry, Kelly, additional, Gonsoulin, Courtney K., additional, Persson, Martin, additional, Davies, Gareth, additional, Sethna, Navil F., additional, Munoz-Pareja, Jennifer C., additional, Kuijpers-Jagtman, Anne Marie, additional, Grayson, Barry H., additional, Grollemund, Bruno, additional, Garib, Daniela G., additional, Meazzini, Maria Costanza, additional, Kharbanda, Om P., additional, Santiago, Pedro E., additional, Nalabothu, Prasad, additional, Batra, Puneet, additional, Stieber, Erin, additional, Prasad, Dushyant, additional, Brewster, Hugh, additional, Ayala, Ruben, additional, Erbay, Elif, additional, Akcam, M. Okan, additional, Don Griot, J. Peter W., additional, Vyas, Raj M., additional, Flores, Roberto L, additional, Breugem, Corstiaan C., additional, and Hamdan, Usama S., additional

Published
2022
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13. CAL2: project update of the NRC Canada facility-class focal plane wavefront sensor for the Gemini Planet Imager 2 upgrade

Author

Jackson, Kathryn J., Schmidt, Dirk, Vernet, Elise, Marois, Christian, Lardière, Olivier, Fitzsimmons, Joeleff, Demers, Mathieu, Johnson, Adam B., Dutt, Saugata, Nkwari, Patrick, Gerard, Benjamin, Dunn, Jennifer, Li, Duan, Fu, Qiang, Brousseau, Denis, Sivanandam, Suresh, Thompson, William, Mann, Christopher, Singh, Garima, Boucher, Marc-André, Hardy, Tim, Caputa, Krzysztof, Thibault, Simon, Savransky, Dmitry, Heidrich, Wolfgang, van Kooten, Maaike, Véran, Jean-Pierre, Jensen-Clem, Rebecca, Gamroth, Darryl, Bradley, Colin, Rawat, Sanjana, Galvan, Öykü S., Herriot, Glen, and Landry, Jean-Thomas

Published
2024
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14. Impact of Surgery for Velopharyngeal Insufficiency on Eustachian Tube Function in Children: Pharyngeal Flap Versus Sphincter Pharyngoplasty.

Author

Fuller, Colin, Brown, Kesley, Speed, Olivia, Gardner, James, Thomason, Ashlen, Dornhoffer, John, Johnson, Adam B., and Hartzell, Larry

Subjects
PHARYNX surgery, VELOPHARYNGEAL insufficiency, EUSTACHIAN tube, SURGICAL complications, RETROSPECTIVE studies, DESCRIPTIVE statistics
Abstract

Objective: Velopharyngeal insufficiency (VPI) is a common speech disorder in patients with a history of cleft palate (CP) or 22q11.2 deletion syndrome. Pharyngeal flap (PF) and sphincter pharyngoplasty (SP) are 2 common surgeries to treat this disorder by decreasing unwanted nasal air emission and hypernasal resonance. Because Eustachian tube dysfunction (ETD) in patients with CP may be more frequent after surgery for VPI, we examined whether ETD was associated with either type of surgery. Design: Retrospective cohort study. Setting: Children's hospital-based tertiary referral center. Patients: A total of 225 children with VPI who underwent primary PF (201) or SP (24) between 2006 and 2017. Outcome measures: We examined differences in risk of ETD according to both surgical groups and proxies for postoperative nasal obstruction. These proxies included postoperative resonance measures and development of obstructive sleep apnea (OSA). Results: Both surgical groups had similar preoperative measures, except the PF group had higher hypernasality by PSA. Post-operatively, the PF group demonstrated lower hypernasal resonance by nasometry and PSA. There were no differences between PF and SP groups with regard to ETD. Proxies for postoperative nasal obstruction also were not predictive of postoperative ETD. Degree of CP and younger age were found to be risk factors for ETD. Conclusion: There was no significant difference in the effects of PF and SP on ETD in this study. Neither lower hypernasality nor incidence of OSA had any impact on ETD. Degree of CP and younger age were the only significant risk factors for ETD that this study identified. [ABSTRACT FROM AUTHOR]

Published
2021
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19. Impact of Surgery for Velopharyngeal Insufficiency on Eustachian Tube Function in Children: Pharyngeal Flap Versus Sphincter Pharyngoplasty.

Author

Fuller C, Brown K, Speed O, Gardner J, Thomason A, Dornhoffer J, Johnson AB, and Hartzell L

Subjects
Child, Humans, Pharynx surgery, Retrospective Studies, Treatment Outcome, Cleft Palate surgery, Eustachian Tube surgery, Velopharyngeal Insufficiency surgery
Abstract

Objective: Velopharyngeal insufficiency (VPI) is a common speech disorder in patients with a history of cleft palate (CP) or 22q11.2 deletion syndrome. Pharyngeal flap (PF) and sphincter pharyngoplasty (SP) are 2 common surgeries to treat this disorder by decreasing unwanted nasal air emission and hypernasal resonance. Because Eustachian tube dysfunction (ETD) in patients with CP may be more frequent after surgery for VPI, we examined whether ETD was associated with either type of surgery., Design: Retrospective cohort study., Setting: Children's hospital-based tertiary referral center., Patients: A total of 225 children with VPI who underwent primary PF (201) or SP (24) between 2006 and 2017., Outcome Measures: We examined differences in risk of ETD according to both surgical groups and proxies for postoperative nasal obstruction. These proxies included postoperative resonance measures and development of obstructive sleep apnea (OSA)., Results: Both surgical groups had similar preoperative measures, except the PF group had higher hypernasality by PSA. Postoperatively, the PF group demonstrated lower hypernasal resonance by nasometry and PSA. There were no differences between PF and SP groups with regard to ETD. Proxies for postoperative nasal obstruction also were not predictive of postoperative ETD. Degree of CP and younger age were found to be risk factors for ETD., Conclusion: There was no significant difference in the effects of PF and SP on ETD in this study. Neither lower hypernasality nor incidence of OSA had any impact on ETD. Degree of CP and younger age were the only significant risk factors for ETD that this study identified.

Published
2021
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