Philip Schniter

216 papers A* 7B 12Misc 25Journal 148Unranked 24
YearRankTypeTitle / Venue / Authors
2025 J jnl
CoRR
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2025 J jnl
Trans. Mach. Learn. Res.
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2025 J jnl
IEEE Trans. Computational Imaging
Saurav K. Shastri, Philip Schniter
2025 J jnl
CoRR
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2025 J jnl
Trans. Mach. Learn. Res.
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2025 J jnl
CoRR
Edward T. Reehorst, Philip Schniter
2025 J jnl
CoRR
Matthew C. Bendel, Saurav K. Shastri, Rizwan Ahmad, Philip Schniter
2025 J jnl
Trans. Mach. Learn. Res.
Matthew C. Bendel, Saurav K. Shastri, Rizwan Ahmad, Philip Schniter
2024 J jnl
CoRR
Saurav K. Shastri, Philip Schniter
2024 conf
ISBI
Xuan Lei, Philip Schniter, Chong Chen, Muhammad Ahmad Sultan, Rizwan Ahmad
2024 conf
ECCV (60)
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2024 J jnl
CoRR
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2024 A* conf
NeurIPS
Matthew C. Bendel, Rizwan Ahmad, Philip Schniter
2024 J jnl
CoRR
Matthew C. Bendel, Rizwan Ahmad, Philip Schniter
2023 A* conf
ICML
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2023 J jnl
CoRR
Jeffrey Wen, Rizwan Ahmad, Philip Schniter
2023 A* conf
NeurIPS
Matthew C. Bendel, Rizwan Ahmad, Philip Schniter
2023 Misc conf
ACSSC
Saurav K. Shastri, Rizwan Ahmad, Philip Schniter
2022 J jnl
CoRR
Matthew C. Bendel, Rizwan Ahmad, Philip Schniter
2022 J jnl
IEEE J. Sel. Areas Inf. Theory
Saurav K. Shastri, Rizwan Ahmad, Christopher A. Metzler, Philip Schniter
2022 J jnl
CoRR
Saurav K. Shastri, Rizwan Ahmad, Christopher A. Metzler, Philip Schniter
2022 Misc conf
ICASSP
Saurav K. Shastri, Rizwan Ahmad, Christopher A. Metzler, Philip Schniter
2022 J jnl
CoRR
Saurav K. Shastri, Rizwan Ahmad, Christopher A. Metzler, Philip Schniter
2022 Misc conf
ICASSP
Sizhuo Liu, Philip Schniter, Rizwan Ahmad
2021 conf
ACSCC
Michael Wharton, Anne M. Pavy, Philip Schniter
2021 Misc conf
ICASSP
Subrata Sarkar, Rizwan Ahmad, Philip Schniter
2021 J jnl
CoRR
Michael Wharton, Anne M. Pavy, Philip Schniter
2021 J jnl
IEEE Signal Process. Mag.
Rémi Gribonval, Antoine Chatalic, Nicolas Keriven, Vincent Schellekens, Laurent Jacques, Philip Schniter
2020 Misc conf
ICASSP
Philip Schniter
2020 J jnl
IEEE Trans. Signal Process.
Philip Schniter
2020 Misc conf
ACSSC
Saurav K. Shastri, Rizwan Ahmad, Philip Schniter
2020 J jnl
CoRR
Saurav K. Shastri, Rizwan Ahmad, Philip Schniter
2020 conf
ISBI
Sizhuo Liu, Edward T. Reehorst, Philip Schniter, Rizwan Ahmad
2020 J jnl
CoRR
Sizhuo Liu, Edward T. Reehorst, Philip Schniter, Rizwan Ahmad
2020 J jnl
IEEE J. Sel. Areas Inf. Theory
Parthe Pandit, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2020 J jnl
CoRR
Parthe Pandit, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2020 J jnl
CoRR
Subrata Sarkar, Rizwan Ahmad, Philip Schniter
2020 A* conf
NeurIPS
Parthe Pandit, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2020 J jnl
IEEE Trans. Wirel. Commun.
Khac-Hoang Ngo, Maxime Guillaud, Alexis Decurninge, Sheng Yang, Philip Schniter
2020 J jnl
IEEE Signal Process. Mag.
Rizwan Ahmad, Charles A. Bouman, Gregery T. Buzzard, Stanley H. Chan, Sizhuo Liu, Edward T. Reehorst, Philip Schniter
2020 J jnl
CoRR
Rémi Gribonval, Antoine Chatalic, Nicolas Keriven, Vincent Schellekens, Laurent Jacques, Philip Schniter
2019 J jnl
CoRR
Philip Schniter
2019 J jnl
IEEE Trans. Signal Process.
Philip Schniter, Evan Byrne
2019 J jnl
IEEE Trans. Signal Process.
Subrata Sarkar, Alyson K. Fletcher, Sundeep Rangan, Philip Schniter
2019 Misc conf
ACSSC
Michael Wharton, Edward T. Reehorst, Philip Schniter
2019 J jnl
CoRR
Parthe Pandit, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2019 J jnl
IEEE Trans. Signal Process.
Peng Sun, Zhongyong Wang, Robert W. Heath Jr., Philip Schniter
2019 J jnl
CoRR
Khac-Hoang Ngo, Maxime Guillaud, Alexis Decurninge, Sheng Yang, Subrata Sarkar, Philip Schniter
2019 Misc conf
ACSSC
Khac-Hoang Ngo, Maxime Guillaud, Alexis Decurninge, Sheng Yang, Subrata Sarkar, Philip Schniter
2019 J jnl
IEEE Trans. Inf. Theory
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher, Subrata Sarkar
2019 J jnl
CoRR
Rizwan Ahmad, Charles A. Bouman, Gregery T. Buzzard, Stanley H. Chan, Edward T. Reehorst, Philip Schniter
2019 J jnl
IEEE Trans. Computational Imaging
Edward T. Reehorst, Philip Schniter
2019 J jnl
IEEE Trans. Signal Process.
Evan Byrne, Antoine Chatalic, Rémi Gribonval, Philip Schniter
2019 J jnl
IEEE Trans. Inf. Theory
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2018 J jnl
IEEE Trans. Signal Process.
Maher Al-Shoukairi, Philip Schniter, Bhaskar D. Rao
2018 Misc conf
ACSSC
Philip Schniter, Evan Byrne
2018 J jnl
CoRR
Evan Byrne, Philip Schniter
2018 conf
LVA/ICA
Christopher A. Metzler, Philip Schniter, Richard G. Baraniuk
2018 J jnl
CoRR
Christopher A. Metzler, Philip Schniter, Richard G. Baraniuk
2018 J jnl
CoRR
Subrata Sarkar, Alyson K. Fletcher, Sundeep Rangan, Philip Schniter
2018 J jnl
IEEE Trans. Signal Process.
Jianhua Mo, Philip Schniter, Robert W. Heath Jr.
2018 B conf
ISIT
Alyson K. Fletcher, Sundeep Rangan, Philip Schniter
2018 J jnl
IEEE Trans. Signal Process.
Peng Sun, Zhongyong Wang, Philip Schniter
2018 J jnl
CoRR
Peng Sun, Zhongyong Wang, Robert W. Heath Jr., Philip Schniter
2018 A* conf
NeurIPS
Alyson K. Fletcher, Parthe Pandit, Sundeep Rangan, Subrata Sarkar, Philip Schniter
2018 J jnl
CoRR
Alyson K. Fletcher, Sundeep Rangan, Subrata Sarkar, Philip Schniter
2018 J jnl
CoRR
Edward T. Reehorst, Philip Schniter
2018 J jnl
CoRR
Christopher A. Metzler, Philip Schniter, Ashok Veeraraghavan, Richard G. Baraniuk
2018 A* conf
ICML
Christopher A. Metzler, Philip Schniter, Ashok Veeraraghavan, Richard G. Baraniuk
2017 J jnl
CoRR
Maher Al-Shoukairi, Philip Schniter, Bhaskar D. Rao
2017 J jnl
IEEE Trans. Signal Process.
Mark Borgerding, Philip Schniter, Sundeep Rangan
2017 J jnl
IEEE Trans. Signal Process.
Sundeep Rangan, Alyson K. Fletcher, Vivek K. Goyal, Evan Byrne, Philip Schniter
2017 J jnl
IEEE Trans. Inf. Theory
Sundeep Rangan, Alyson K. Fletcher, Philip Schniter, Ulugbek S. Kamilov
2017 Misc conf
ACSSC
Peng Sun, Zhongyong Wang, Robert W. Heath Jr., Philip Schniter
2017 Misc conf
ICASSP
Alyson K. Fletcher, Philip Schniter
2017 conf
NIPS
Alyson K. Fletcher, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter
2017 J jnl
CoRR
Alyson K. Fletcher, Mojtaba Sahraee-Ardakan, Philip Schniter, Sundeep Rangan
2017 J jnl
CoRR
Evan Byrne, Rémi Gribonval, Philip Schniter
2017 Misc conf
ACSSC
Evan Byrne, Rémi Gribonval, Philip Schniter
2017 B conf
ISIT
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2016 J jnl
IEEE J. Sel. Top. Signal Process.
Marcelo Pereyra, Philip Schniter, Emilie Chouzenoux, Jean-Christophe Pesquet, Jean-Yves Tourneret, Alfred O. Hero III, Steve McLaughlin
2016 J jnl
CoRR
Jianhua Mo, Philip Schniter, Robert W. Heath Jr.
2016 J jnl
CoRR
Philip Schniter, Sundeep Rangan, Alyson K. Fletcher
2016 J jnl
CoRR
Alyson K. Fletcher, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter
2016 B conf
ISIT
Alyson K. Fletcher, Mojtaba Sahraee-Ardakan, Sundeep Rangan, Philip Schniter
2016 J jnl
IEEE Trans. Inf. Theory
Sundeep Rangan, Philip Schniter, Erwin Riegler, Alyson K. Fletcher, Volkan Cevher
2016 J jnl
CoRR
Mark Borgerding, Philip Schniter
2016 conf
GlobalSIP
Mark Borgerding, Philip Schniter
2016 J jnl
CoRR
Mark Borgerding, Philip Schniter
2016 J jnl
IEEE J. Sel. Top. Signal Process.
Jason T. Parker, Philip Schniter
2016 J jnl
CoRR
Christophe Schülke, Philip Schniter, Lenka Zdeborová
2016 J jnl
IEEE Trans. Signal Process.
Evan Byrne, Philip Schniter
2016 J jnl
CoRR
Philip Schniter, Sundeep Rangan, Alyson K. Fletcher
2016 J jnl
CoRR
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2016 Misc conf
ACSSC
Philip Schniter, Sundeep Rangan, Alyson K. Fletcher
2015 Misc conf
ICASSP
Jeremy P. Vila, Philip Schniter, Sundeep Rangan, Florent Krzakala, Lenka Zdeborová
2015 J jnl
IEEE Trans. Signal Process.
Justin Ziniel, Philip Schniter, Per Sederberg
2015 J jnl
IEEE Trans. Signal Process.
Philip Schniter, Sundeep Rangan
2015 Misc conf
ICASSP
Mark Borgerding, Philip Schniter, Jeremy P. Vila, Sundeep Rangan
2015 J jnl
IEEE Trans. Computational Imaging
Jeremy P. Vila, Philip Schniter, Joseph Meola
2015 J jnl
CoRR
Jeremy P. Vila, Philip Schniter, Joseph Meola
2015 J jnl
CoRR
Sundeep Rangan, Alyson K. Fletcher, Philip Schniter, Ulugbek Kamilov
2015 B conf
ISIT
Sundeep Rangan, Alyson K. Fletcher, Philip Schniter, Ulugbek S. Kamilov
2015 J jnl
CoRR
Rizwan Ahmad, Philip Schniter
2015 J jnl
IEEE Trans. Computational Imaging
Rizwan Ahmad, Philip Schniter
2015 J jnl
CoRR
Jason T. Parker, Yan Shou, Philip Schniter
2015 J jnl
CoRR
Evan Byrne, Philip Schniter
2015 J jnl
CoRR
Marcelo Pereyra, Philip Schniter, Emilie Chouzenoux, Jean-Christophe Pesquet, Jean-Yves Tourneret, Alfred O. Hero III, Steve McLaughlin
2014 J jnl
IEEE Trans. Signal Process.
Marcel Nassar, Philip Schniter, Brian L. Evans
2014 J jnl
CoRR
Jeremy P. Vila, Philip Schniter, Sundeep Rangan, Florent Krzakala, Lenka Zdeborová
2014 J jnl
IEEE Trans. Signal Process.
Jeremy P. Vila, Philip Schniter
2014 J jnl
IEEE Trans. Signal Process.
Jason T. Parker, Philip Schniter, Volkan Cevher
2014 J jnl
IEEE Trans. Signal Process.
Jason T. Parker, Philip Schniter, Volkan Cevher
2014 J jnl
CoRR
Justin Ziniel, Philip Schniter
2014 Misc conf
CISS
Justin Ziniel, Philip Schniter, Per Sederberg
2014 Misc conf
ACSSC
Philip Schniter, Akbar M. Sayeed
2014 Misc conf
ACSSC
Jianhua Mo, Philip Schniter, Nuria González-Prelcic, Robert W. Heath Jr.
2014 J jnl
CoRR
Philip Schniter, Sundeep Rangan
2014 J jnl
IEEE J. Sel. Areas Commun.
Ashutosh Sabharwal, Philip Schniter, Dongning Guo, Daniel W. Bliss, Sampath Rangarajan, Risto Wichman
2014 J jnl
IEEE J. Sel. Areas Commun.
Ashutosh Sabharwal, Philip Schniter, Dongning Guo, Daniel W. Bliss, Sampath Rangarajan, Risto Wichman
2014 J jnl
CoRR
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2014 B conf
ISIT
Sundeep Rangan, Philip Schniter, Alyson K. Fletcher
2013 J jnl
CoRR
Marcel Nassar, Philip Schniter, Brian L. Evans
2013 J jnl
CoRR
Jeremy P. Vila, Philip Schniter
2013 conf
CAMSAP
Jeremy P. Vila, Philip Schniter
2013 J jnl
CoRR
Jason T. Parker, Philip Schniter, Volkan Cevher
2013 J jnl
IEEE Trans. Signal Process.
Justin Ziniel, Philip Schniter
2013 J jnl
IEEE Trans. Signal Process.
Justin Ziniel, Philip Schniter
2013 J jnl
IEEE Trans. Signal Process.
Jeremy P. Vila, Philip Schniter
2013 J jnl
CoRR
Sundeep Rangan, Philip Schniter, Erwin Riegler, Alyson K. Fletcher, Volkan Cevher
2013 B conf
ISIT
Sundeep Rangan, Philip Schniter, Erwin Riegler, Alyson K. Fletcher, Volkan Cevher
2013 J jnl
CoRR
Mark Borgerding, Philip Schniter
2013 J jnl
CoRR
Ashutosh Sabharwal, Philip Schniter, Dongning Guo, Daniel W. Bliss, Sampath Rangarajan, Risto Wichman
2013 J jnl
IEEE J. Sel. Areas Commun.
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2012 conf
SSP
Justin Ziniel, Sundeep Rangan, Philip Schniter
2012 J jnl
Phys. Commun.
Philip Schniter
2012 J jnl
IEEE Trans. Signal Process.
Subhojit Som, Philip Schniter
2012 conf
Allerton Conference
Philip Schniter, Sundeep Rangan
2012 J jnl
CoRR
Justin Ziniel, Philip Schniter
2012 J jnl
CoRR
Jeremy P. Vila, Philip Schniter
2012 Misc conf
CISS
Jeremy P. Vila, Philip Schniter
2012 J jnl
IEEE Trans. Signal Process.
Brian P. Day, Adam R. Margetts, Daniel W. Bliss, Philip Schniter
2012 J jnl
IEEE J. Sel. Areas Commun.
Brian P. Day, Adam R. Margetts, Daniel W. Bliss, Philip Schniter
2012 conf
ACSCC
Brian P. Day, Adam R. Margetts, Daniel W. Bliss, Philip Schniter
2012 conf
ACSCC
Daniel W. Bliss, Timothy M. Hancock, Philip Schniter
2012 B conf
ISIT
Sundeep Rangan, Alyson K. Fletcher, Vivek K. Goyal, Philip Schniter
2012 J jnl
IEEE Trans. Signal Process.
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2012 J jnl
IEEE Trans. Inf. Theory
Sugumar Murugesan, Philip Schniter, Ness B. Shroff
2012 J jnl
CoRR
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2012 A* conf
INFOCOM
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2012 J jnl
IEEE Trans. Signal Process.
Can Emre Koksal, Philip Schniter
2011 J jnl
IEEE J. Sel. Top. Signal Process.
Philip Schniter
2011 J jnl
CoRR
Philip Schniter
2011 J jnl
CoRR
Subhojit Som, Philip Schniter
2011 conf
ACSCC
Jason T. Parker, Volkan Cevher, Philip Schniter
2011 J jnl
CoRR
Justin Ziniel, Philip Schniter
2011 conf
ACSCC
Justin Ziniel, Philip Schniter
2011 conf
ACSCC
Jeremy P. Vila, Philip Schniter
2011 conf
CAMSAP
Philip Schniter
2011 J jnl
CoRR
Brian P. Day, Adam R. Margetts, Daniel W. Bliss, Philip Schniter
2011 conf
ACSCC
Brian P. Day, Daniel W. Bliss, Adam R. Margetts, Philip Schniter
2011 J jnl
CoRR
Sundeep Rangan, Alyson K. Fletcher, Vivek K. Goyal, Philip Schniter
2011 J jnl
CoRR
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2011 J jnl
IEEE Trans. Signal Process.
Rohit Aggarwal, Mohamad Assaad, Can Emre Koksal, Philip Schniter
2011 J jnl
IEEE Trans. Inf. Theory
Arun Pachai Kannu, Philip Schniter
2011 B conf
ISIT
Arun Pachai Kannu, Philip Schniter
2011 J jnl
CoRR
Rohit Aggarwal, Can Emre Koksal, Philip Schniter
2010 J jnl
CoRR
Philip Schniter
2010 J jnl
CoRR
Sugumar Murugesan, Philip Schniter, Ness B. Shroff
2010 J jnl
CoRR
Arun Pachai Kannu, Philip Schniter
2010 J jnl
IEEE Trans. Inf. Theory
Arun Pachai Kannu, Philip Schniter
2010 J jnl
CoRR
Rohit Aggarwal, Mohamad Assaad, Can Emre Koksal, Philip Schniter
2010 conf
Allerton
Sugumar Murugesan, Philip Schniter, Ness B. Shroff
2010 Misc conf
CISS
Philip Schniter
2009 J jnl
CoRR
Sugumar Murugesan, Philip Schniter
2009 J jnl
CoRR
Can Emre Koksal, Philip Schniter
2009 J jnl
CoRR
Sugumar Murugesan, Philip Schniter
2009 J jnl
CoRR
Rohit Aggarwal, Philip Schniter, Can Emre Koksal
2009 J jnl
IEEE Trans. Wirel. Commun.
Rohit Aggarwal, Philip Schniter, Can Emre Koksal
2008 conf
ACSCC
Lee C. Potter, Philip Schniter, Justin Ziniel
2008 J jnl
IEEE Trans. Signal Process.
Arun Pachai Kannu, Philip Schniter
2008 J jnl
IEEE J. Sel. Areas Commun.
Sung-Jun Hwang, Philip Schniter
2008 J jnl
IEEE Trans. Wirel. Commun.
Hong Liu, Philip Schniter
2008 conf
Allerton
Sugumar Murugesan, Philip Schniter, Ness B. Shroff
2008 J jnl
IEEE Trans. Inf. Theory
Kambiz Azarian, Hesham El Gamal, Philip Schniter
2007 conf
Underwater Networks
Sung-Jun Hwang, Philip Schniter
2007 Misc conf
CISS
Hong Liu, Philip Schniter
2007 J jnl
IEEE Trans. Wirel. Commun.
Adam R. Margetts, Philip Schniter, Ananthram Swami
2007 J jnl
IEEE Trans. Signal Process.
Sibasish Das, Philip Schniter
2007 J jnl
IEEE J. Sel. Areas Commun.
Sugumar Murugesan, Elif Uysal-Biyikoglu, Philip Schniter
2006 J jnl
EURASIP J. Adv. Signal Process.
Sung-Jun Hwang, Philip Schniter
2006 Misc conf
CISS
Arun Pachai Kannu, Philip Schniter
2006 Misc conf
CISS
Philip Schniter
2006 J jnl
CoRR
Kambiz Azarian, Hesham El Gamal, Philip Schniter
2005 J jnl
IEEE Trans. Signal Process.
Adam R. Margetts, Philip Schniter
2005 conf
ICASSP (3)
Arun Pachai Kannu, Philip Schniter
2005 J jnl
CoRR
Kambiz Azarian, Hesham El Gamal, Philip Schniter
2005 J jnl
IEEE Trans. Inf. Theory
Kambiz Azarian, Hesham El Gamal, Philip Schniter
2005 conf
ICASSP (3)
Adam R. Margetts, Philip Schniter, Ananthram Swami
2004 B conf
ITW
Kambiz Azarian, Hesham El Gamal, Philip Schniter
2004 J jnl
IEEE Trans. Signal Process.
Philip Schniter
2004 conf
ICASSP (3)
Philip Schniter
2004 J jnl
IEEE Trans. Wirel. Commun.
Bijoy Bhukania, Philip Schniter
2004 J jnl
IEEE Signal Process. Lett.
Brian D. Rigling, Philip Schniter
2003 B conf
GLOBECOM
Philip Schniter
2003 B conf
WCNC
Bijoy Bhukania, Philip Schniter
2002 Misc conf
ICASSP
Richard G. Baraniuk, C. Sidney Burrus, B. M. Hendricks, G. L. Henry, Alfred O. Hero III, Don H. Johnson, Douglas L. Jones, Julius Kusuma, Robert D. Nowak, J. E. Odegard, Lee C. Potter, Kannan Ramchandran, R. J. Reedstrom, Philip Schniter, Ivan W. Selesnick, Douglas B. Williams, W. L. Wilson
2002 J jnl
IEEE Trans. Inf. Theory
Wanshi Chen, Urbashi Mitra, Philip Schniter
2001 J jnl
IEEE Trans. Signal Process.
Philip Schniter, Lang Tong
2001 J jnl
IEEE Trans. Signal Process.
Philip Schniter, Raúl A. Casas, Azzédine Touzni, C. Richard Johnson Jr.
2000 J jnl
IEEE Trans. Inf. Theory
Philip Schniter, C. Richard Johnson Jr.
2000 J jnl
IEEE Trans. Signal Process.
Philip Schniter, C. Richard Johnson Jr.
1999 J jnl
IEEE Trans. Signal Process.
Philip Schniter, C. Richard Johnson Jr.
1999 B conf
WCNC
Philip Schniter, C. Richard Johnson Jr.
1998 J jnl
Proc. IEEE
C. Richard Johnson Jr., Philip Schniter, Thomas J. Endres, James D. Behm, Donald Richard Brown, Raúl A. Casas
1998 Misc conf
ICASSP
Philip Schniter, C. Richard Johnson Jr.