Jurgen's Talks
2021
A Measurement of the
K+→π+νν decay.
Seminario de Altas Energias Conjunto IF-UNAM ICN-UNAM,
Instituto de Ciencias Nucleares, UNAM, Mexico City, 21 April 2021.
2020
A new RICH for the Future program.
NA62 Weekly Meeting, March 5 2020.
2019
A First look at Rπ. NA62 Collaboration Meeting, Playa del Carmen, Mexico, December 4, 2019.
NA62 Physics.
Invited Plenary talk, XVII Mexican Workshop on Particles and Fields,
Biblioteca Pública Central Estatal Wigberto Jiménez Moreno
Leon, Gto., Mexico, 24 October 2019.
Dark sector searches in NA62 and other non-LHC experiments.
Invited talk,
7th Large Hadron Collider Physics Conference (LHCP19),
Puebla, Mexico, May 20, 2019.
Measuring a small and interesting CKM Matrix element;
First NA62 Results for K+→π+νν.
Coloquio "Marcos Moshinsky",
División de Ciencias e Ingenierías de la
Universidad de Guanajuato, Campus León
March 22, 2019.
Status of Processing Axion and Muon Runs in Louvain. NA62 DP/Q meeting, March 21, 2019.
2018
Italo's π0's. NA62 Collaboration Meeting, CERN, December 12, 2018.
Resources for Computing.
NA62 Analysis Meeting, October 24 2018.
Hadroproduction in NA62. NA62 Collaboration Meeting, Pisa, Italy, September 5, 2018.
Search for K+→π+νν: First NA62 Results.
Invited Plenary talk, 16th Conference on Flavor Physics and CP Violation (FPCP 2018),
Hyderabad, India
July 14, 2018.
2017
Some examples of Memory Usages of Recon and Analyzer. NA62 Collaboration DP/Q Meeting, December 12, 2017.
Update: Data Quality, Preparation, Processing.
NA62 Weekly Meeting, October 12 2017.
NA62 - Status and Plans.
AMS-COMPASS-NA62-NTOF-Neutrino-IT coordination meeting,
October 2, 2017
Update: Data Quality, Preparation, Processing.
NA62 Software Meeting, August 29, 2017.
Update: RICH Radius, Number of Hits.
NA62 RICH Meeting, August 29 2017.
Challenges and Ideas for Offline Processing.
NA62 Data Processing Meeting, August 10 2017.
Update: RICH Radius, Number of Hits.
NA62 RICH Meeting, June 27 2017.
Update: RICH Number of Hits.
NA62 RICH Meeting, May 11 2017.
Update: RICH Likelihhod Efficiency in Golden Runs.
NA62 Data Quality Meeting, February 8 2017.
Number of Hits in the NA62 RICH, compared to SELEX RICH expectations.
NA62 RICH Meeting, February 23, 2017.
2016
Update: RICH Radius, Number of Hits.
NA62 RICH Meeting, December 2 2016.
Update: RICH Radius, Number of Hits.
NA62 RICH Meeting, November 17 2016.
NA62 - The Kaon Factory.
Platica invitada, XXX Reunión de la División
de Partículas y Campos
de la Sociedad Mexicana de Física, Puebla, Mexico, 23 de Mayo 2016.
2015
RICH Negative Track Acceptance and Trigger.
NA62 Weekly Meeting, November 5 2015.
RICH Likelihoods en NA62.
NA62 Working Group Meetings, October 13/14 2015.
Las propiedades de los mesones y bariones extranos y encatados: Una vista experimental.
Seminario del Depto de Gravitacion y Teoria de Campos, ICN, UNAM, Mexico,
26 de marzo de 2015.
Decaimientos raros del K+ en el experimento NA62.
Seminario de Altas Energias, Cinvestav, Mexico, 24 de marzo de 2015.
2014
Estudios de decaimientos raros del K+ en
el experimento NA62.
Seminario del Departamento de Fisica, Universidad de Guanajuato,
Campus Leon, 7 Noviembre 2014.
Estudios de decaimientos raros del K+ en
el experimento NA62.
Seminario de Altas Energias Conjunto IF-UNAM ICN-UNAM,
Instituto de Ciencias Nucleares, UNAM, Mexico City, 25 Junio 2014.
2013
Conference Summary.
Invited Talk,
8th International Workshop on Ring Imaging Cherenkov Detectors (RICH 2013),
Hayama, Kanagawa, Japan, 2-6 Dec 2013
Doubly charmed baryon results from SELEX.
Invited Keynote Talk,
Physics at A Fixed Target ExpeRiment (AFTER) using the LFC beams,
ECT*, Trento, Italy, 3-13 February 2013.
2011
Como (no) funciona un reactor nuclear.
Hospital IMSS Zapata, San Luis Potosi, Mexico, 26 May 2011.
Como (no) funciona un reactor nuclear.
Facultad de Ciencias Quimicas, UASLP, San Luis Potosi, Mexico, 17 May 2011.
Como (no) funciona un reactor nuclear.
Facultad de Ciencias, UASLP, San Luis Potosi, Mexico, 3 May 2011.
Como (no) funciona un reactor nuclear.
Ciencia en el Bar, San Luis Potosi, Mexico, 6 April 2011.
2010
Cherenkov light imaging fundamentals and recent developments.
Invited Plenary Talk,
7th International Workshop on Ring Imaging Cherenkov Detectors (RICH 2010),
Cassis, Provence, France, 3-7 May 2010.
2009
Charmed and Doubly Charmed Baryons - Recent Results from SELEX.
Coloquio, Instituto de Fisica-Matematica,, UMSNH, Morelia, 25 September 2009.
The Status of Double Charm Baryons.
Invited Plenary Talk,
GHP2009,
The Third Workshop of the APS Topical Group in Hadron Physics.
April 29 - May 01, 2009 in Denver, Colorado.
Doubly charmed baryon and some other results from SELEX.
Seminario de Altas Energias Conjunto IF-UNAM ICN-UNAM,
Instituto de Fisica, UNAM, Mexico City, 22 April 2009.
Doubly charmed baryon (and some other) results from SELEX.
Experimental Seminar, SLAC, Stanford, California, 27 January 2009.
2008
El LHC - la máquina que No va destruir el mundo.
Ciencia en el Bar, San Luis Potosi, Mexico, 5 November 2008.
Properties of Single and Double Charm Hadrons.
Invited talk at International Conference
"XIII Mexican School of Particles and Fields",
San Carlos, Sonora, Mexico, 2-11 October 2008.
2006
SELEX: Recent Progress in the Analysis
of Charm-Strange and Double-Charm Baryons.
Invited talk at International Conference "Heavy Quarks & Leptons"
(HQL06),
October 16-20, 2006, Munich, Germany.
Recent Progress in the Analysis of Double Charm Baryons.
International Workshop on Heavy Quarkonium,
Brookhaven National Laboratory, June 27-30, 2006.
2005
La Física de las Partículas Elementales -
como hacerlo en México?
Seminario, Escuela de Ciencias Físico-Matemáticas,
Universidad Autónoma de Sinaloa, Culiacán, Diciembre 1, 2005.
Software Libre Científico.
3er Congreso de Sistemas e Informática,
Instituto Technologico de San Luis Potosi,
Octubre 21, 2005.
Tchernobyl y la Física de Altas Energías.
Club de Ciencias "Los Informales", Facultad de Ciencias, Universidad
Autonoma de San Luis Postosí, Sep 22, 2005.
Recent Experimental Results on the Spectroscopy of
Charmed and Non-Charmed Hadrons.
Taller de Física del Sabor. Instituto de Física,
Universidad Autónoma de San Luis Potosí,
September 8, 2005.
Producción Inclusiva de &Lambda,, Anti-Λ y Ks
mediante
las Colisiones Σ-, π-, π+
y p - Nucleón.
Reunion Anual de la Division de Particulas y Campos de la
Sociedad Mexicana de Fisica, Unidad de Seminarios Ignacio Chavez de
la UNAM,
Cd. Universitaria, D.F., Mexico, 31 de Mayo 2005.
Nuevos resultados experimentales en Hadrones.
Seminario "Francisco Mejia Lira", IICO,
Universidad Autónoma de San Luis Potosi,
20 de Mayo de 2005.
Recent Experimental Results on Charmed and Non-Charmed Hadrons.
Colloquium, Department of Physics, University of Utah, Salt Lake City,
April 7, 2005.
2004
Particle Identification.
Short Course "Radiation Detection",
IEEE Nuclear Science Symposium, Rome, Italy, October 16, 2004.
Recent SELEX Results on the Properties of Charmed Hadrons.
Quark Confinement and the Hadron Spectrum VI,
Villasimius (Cagliari) Sardinia - Italy, September 21-25, 2004.
Search for strange and charm Pentaquarks in SELEX.
Quark Confinement and the Hadron Spectrum VI,
Villasimius (Cagliari) Sardinia - Italy, September 21-25, 2004
Búsqueda de Partículas nuevas en el
Mundo subatomico.
Coloquio, Instutito de Física, UASLP, 15 de Septiembre 2004.
SELEX observation of a new excited Ds meson at 2632MeV.
Seminario conjunto ICN-IF, UNAM, Mexico, 25 de agosto 2004.
The Experimental Discovery of Double-Charm Baryons.
Invited Talk at International Nuclear Physics Conference,
INPC2004,
Göteborg, Sweden, June 27 - July 2, 2004.
Observaciones Experimentales de Hadrones con 2, 3, 4, y 5 quarks.
Colloquium, Instituto de Ciencias Nucleares, UNAM, Mexico City, April 27, 2004.
Particulas Elementales - una vista desde San Luis Potosi.
Seminar, Universidad Veracruziana, Xalapa, Mexico, March 11, 2004.
2003
SELEX RICH Performance and Extrapolations to CKM.
NA48 Weekly Meeting, December 2, 2003, CERN.
Double Charm Baryons in SELEX.
COMPASS Seminar, December 1, 2003, CERN.
Review of Recent Results in Charm Physics.
Invited talk at
9th International Conference on B-Physics at Hadron Machines -
BEAUTY 2003, October 14-18, 2003,
Carnegie Mellon University, Pittsburgh, Pennsylvania, USA.
Instrumentacion en Particulas Elementales.
Club de Ciencias "Los Informales", Facultad de Ciencias, Universidad
Autonoma de San Luis Postosí, October 1, 2003.
Particulas Elementales - una vista desde San Luis Potosi.
Seminar, CINVESTAV Unidad Merida, Merida, Mexico, September 18, 2003.
Instrumentation.
Lecture course at the 2nd Latin American School of High Energy Physics,
San Miguel Regla, Mexico, June 2003:
Talk,
Handout (55MByte ps.gz),
Contribution to Proceedings
physics/0312061.
Particulas Elementales. Encuentro de Fisica, Facultad de
Ciencias, UASLP, May 2003.
Particulas Elementales y el Posgrada en el IF-UASLP.
Seminar, Facultad de Fisica Matematica, Universidad Autonoma de
Nuevo Leon, Monterrey, Mexico, February 28, 2003.
Particulas Elementales. Invited talk at 5. Simposio de Fisica,
ITESM, Monterrey, Mexico, February 27, 2003.
2002
Particle Identification I.
Lecture course at
First ICFA Instrumentation School/Workshop at the ICFA Instrumentation Center in Morelia, Mexico, November 18-29, 2002 University of Michoacan,
Morelia Michoacan, Mexico.
Talk,
handout,
Contribution to Proceedings.
Proyectos de Fisica Fundamental -- Fisica de Altas Energias
o Particulas Elementales.
Poster, presented at Congreso de Investigacion UASLP, 25-27 Sep 2002.
Report about CKM Collaboration Meeting.
Seminario de Particulas Elementales, Instituto de Fisica,
UASLP, September 2, 2002.
Pulse Height Distrubition in Single Photon Counting -
Hamamatsu R760 .
CKM Collaboration Meeting, August 22-25, 2002, Fermilab.
Phototube Window Issue in the Kaon RICH - A Geant Simulation.
CKM Collaboration Meeting, August 22-25, 2002, Fermilab.
Flat Mirror Prototype.
CKM Collaboration Meeting, August 22-25, 2002, Fermilab.
Why we need a CKM RICH Prototype.
CKM Collaboration Meeting, August 22-25, 2002, Fermilab.
Baryones doble encantados: Observaciones recientes de SELEX.
Reunion Anual de la Division de Particulas y Campos de la
Sociedad Mexicana de Fisica, Unidad de Seminarios Ignacio Chavez de
la UNAM,
Cd. Universitaria, D.F., Mexico, July 4/5, 2002
Report about the RICH Conference.
Seminario de Particulas Elementales, Instituto de Fisica,
UASLP, Junio 24, 2002.
Have Doubly-Charmed Baryons Been Discovered?.
Seminario de Altas Energias, CINVESTAV-IPN, Mexico City, June 18, 2002.
Have Doubly-Charmed Baryons Been Discovered?.
Colloquium, Instituto de Fisica, UASLP, June 12, 2002.
SELEX RICH Performance and Physics Results.
4rd International Workshop on Ring Imaging Cherenkov
Detectors, Pylos, Greece, June 5-10, 2002.
Two RICH detectors as Velocity Spectrometer in the CKM Experiment.
4rd International Workshop on Ring Imaging Cherenkov
Detectors, Pylos, Greece, June 5-10, 2002.
The CKM Experiment: Using Rare Kaon Decays to determine
CKM Matrix Elements.
Seminar, Technische Universitat Munchen, Germany, April 10, 2002.
Actividades recentes del experimento SELEX.
Seminario de Altas Energias, CINVESTAV-IPN, Mexico City, January 15, 2002.
2001
RICH Experimental High Energy Physics in San Luis Potosi.
Seminario de Altas Energias, Instituto de Fisica, Universidad
Autonoma de San Luis Potosi, October 9, 2001.
RICH Experimental High Energy Physics in San Luis Potosi.
Coloquium, CINVESTAV-IPN, Mexico City, September 26, 2001.
New SELEX Publication: Hadroproduction of Lambda-charm.
Seminario de Altas Energias, Instituto de Fisica, Universidad
Autonoma de San Luis Potosi, September 24, 2001.
The future Shape of SELEX Computing.
SELEX Collaboration meeting, Fermilab, July 30/31, 2001.
Status of Active Papers.
SELEX Collaboration meeting, Fermilab, July 30/31, 2001.
Recent SELEX RICH Analyses.
SELEX Collaboration meeting, Fermilab, July 30/31, 2001.
Status of Analysis of Resonances in Lambdac->K p pi
in San Luis Potosi.
SELEX Collaboration meeting, Fermilab, July 30/31, 2001.
Status of RICH Systems.
CKM Collaboration meeting, Ann Arbor, Michigan, July 23-26, 2001.
Lessons from the SELEX RICH.
CKM Collaboration meeting, Ann Arbor, Michigan, July 23-26, 2001.
RICH Summary.
CKM Collaboration meeting, Ann Arbor, Michigan, July 23-26, 2001.
Segunda edición de la propuesta CKM.
Reunion Anual de la Division de Particulas y Campos de la
Sociedad Mexicana de Fisica, Unidad de Seminarios Ignacio Chavez de
la UNAM,
Cd. Universitaria, D.F., Mexico, June 28, 2001
Instrumentación en Altas Energías.
Club de Ciencias "Los Informales", Facultad de Ciencias, Universidad
Autonoma de San Luis Postosí, May 9, 2001.
CKM - Presentation for the Fermilab Program Advisory Committee,
April 20, 2001.
Particle Identification. Lecture given at the
ICFA School on Instrumentation in Particle Physics, Faure, South Africa,
March 28, 2001.
ps file (107 MByte),
gzipped ps file (36 MByte) and
pdf file (77 MByte).
Literature list as
ps file,
pdf file.
Status of Pion and Kaon RICHes.
Talk at CKM Collaboration meeting, Fermilab, January 8/9, 2001.
2000
The CKM Experiment: Using Rare Kaon Decays to determine
CKM Matrix Elements.
Seminar, UniCamp, Campinas, Brasil, October 18, 2000.
Recent Results from SELEX.
Seminar, University of Sao Paolo, Brasil, October 16, 2000.
Recent Results from SELEX.
Invited talk at Heavy Quark 2000 Conference, Rio de Janeiro, Brasil,
October 9-12, 2000.
Abstract.
The CKM Experiment: Using Rare Kaon Decays to determine
CKM Matrix Elements.
Seminar, CBPF, Rio de Janeiro, October 6, 2000.
Resultados nuevos de SELEX.
Seminario de Particulas Elementales, Instituto de Fisica,
Universidad Autonoma de San Luis Potosi,
October 2, 2000.
El experimento CKM: Usando decaimentos raros del Kaon a medir
elementos de la matriz CKM.
Seminario de Particulas Elementales, Instituto de Fisica,
Universidad Autonoma de San Luis Potosi,
September 25, 2000.
The CKM Experiment: Using Rare Kaon Decays to determine
CKM Matrix Elements.
Seminar, Instituto de Fisica, Universidad Autonoma de Mexico, Mexico City,
September 22, 2000.
CKM RICHes.
Talk at CKM Collaboration meeting, Fermilab, August 21, 2000.
Ring Imaging Cherenkov Counters: Single photons in High Energy Physics.
Seminar, Centro de Investigaciones Opticas, Leon, Gto, Mexico,
May 19, 2000.
El Encanto de la Física de Partículas. Seminar,
38. Semana de la Ciencias, Facultad de Ciencias, Universidad Autónoma
de San Luis Potosí, March 27, 2000.
La Interacción Débil. Colloquium,
Instituto de Investigacion en Comunicaciones Opticas,
Universidad Autónoma de San Luis Potosi,
San Luis Potosi, Mexico, March 3, 2000.
Bariones, Kaones e Instrumentación en Altas Energías
. Poster presented at 1. Congreso de Responsables de Proyectos de
Ciencias Exactas, Acapulco, Guerrero, Mexico, February 22-25, 2000.
La Interacción Débil. Seminar,
Facultad de Ciencias, Universidad Autónoma del Estado de Morelos,
Guernavaca, Mexico, January 17, 2000.
1999
Experimental Techniques.
Course given at the
VII Mexican Workshop on Particles and Fields, Merida, Mexico,
November 10-17, 1999. Contribution to the
proceedings.
Particulas Elementales. Platica para estudiantes de la
Preparatoria, 6a Semana Nacional de Ciencia y Tecnologia, San Luis Potosi,
26 de Octubre 1999.
Determination of CKM Matrix elements with Rare Kaon Decays.
Colloquium CINVESTAV, Mexico City, October 7, 1999.
CKM RICHes.
Talk at CKM Collaboration meeting, Fermilab, September 3, 1999.
Charm - Recent Experimental Highlights.
Invited talk at the
"XIII Reunion Anual de la Division de Particulas y Campos de la
Sociedad Mexicana de Fisica", CINVESTAV, Mexico City, July 2, 1999.
Fisica de Charm en el Experimento SELEX de Fermilab. Seminar,
Benemerita Universidad Autonoma de Puebla, May 7, 1999.
Single Photon Detection in High Energy Physics Experiments.
Conferencia, Instituto Nacional de Astronomia, Optica y Electronica, Puebla,
Mexico, May 6, 1999.
1998
Particulas Elementales. Reunion General 1998 de la
Sociedad Potosina de Fisica, San Luis Potosi, December 10, 1998.
Design, Construction and Operation of the SELEX Phototube
RICH Detector.
3rd International Workshop on Ring Imaging Cherenkov
Detectors, Ein Gedi, Dead-Sea, Israel, November 15-20, 1998.
Charm Physics in SELEX. Seminar, Tel Aviv University,
Ramat Aviv, Israel, November 15, 1998
CKM: medicion precisa de los decaimientos raros del
K+ -> pi+ nu nu.
XLI Congresso Nacional de Fisica, Sociedad Mexicana de Fisica,
San Luis Potosi, Octubre 30 1998
Contadores Cherenkov de imagenes de anillos (RICH) en experimentos
en Fermilab.
XLI Congresso Nacional de Fisica, Sociedad Mexicana de Fisica,
San Luis Potosi, Octubre 30 1998
CKM: medicion precisa en Fermilab de
K+ -> pi+ nu nu.
XII Reunion Anual de la Division de Particulas y Campos de la
Sociedad Mexicana de Fisica, Unidad de Seminarios Ignacio Chavez de
la UNAM,
Cd. Universitaria, D.F., Mexico, June 19, 1998
Cherenkov Radiation and Applications II.
Seminario Particulas Elementales,
Instituto de Fisica Universidad Autonoma de San Luis Potosi,
San Luis Potosi, SLP Mexico, May 28, 1998
Cherenkov Radiation and Applications.
Seminario Particulas Elementales,
Instituto de Fisica Universidad Autonoma de San Luis Potosi,
San Luis Potosi, SLP Mexico, May 21, 1998
Recent Results from SELEX and the Future in CKM.
Colloquium, Instituto de Fisica Universidad Autonoma de San Luis Potosi,
San Luis Potosi, SLP Mexico, April 29, 1998
1997
SELEX.
"Food for Thought" Seminar, Fermilab, December 8, 1997
Particulas Elementales.
Colloquium, Instituto de Fisica Universidad Autonoma de San Luis Potosi,
San Luis Potosi, SLP Mexico, June 17, 1997
Particulas Elementales.
Decimo Curso de Verano de Fisica Moderna IPN Fermilab, Mexico, DF,
June 16, 1997
SELEX.
FOCUS Student and Postdoc Seminar, Fermilab, May 29, 1997
The SELEX RICH.
Presented at "Workshop on Fixed Target Physics at the Main Injector",
Fermilab, May 1-4, 1997
Charm and Bottom Production in FNAL Fixed Target Experiments.
Talk at XXXIInd Rencontres de Moriond, "QCD and High Energy Hadronic
Interactions", Les Arcs, France, March 24, 1997
Investigating Charmed Baryons.
Seminar, Instituto de Fisica Universidad de Guanojuato,
Leon, Gto Mexico, February 7, 1997
Investigating Charmed Baryons.
Seminar, Universidad Autonoma de Morelia,
Morelia, Mexico, February 4, 1997
Investigating Charmed Baryons.
Seminar, Facultad de Cienias Fisico Matematicas, Benemerita
Universidad Autonoma de Puebla,
Puebla, Mexico, January 30, 1997
Investigating Charming Baryons.
Seminar, Centro de Investigacion y de Estudios Avancados del IPN,
Mexico DF, Mexico, January 28, 1997
Investigating Charming Baryons.
Seminar, Instituto de Fisica Universidad Autonoma de San Luis Potosi,
San Luis Potosi, SLP Mexico, January 23, 1997
1996
The SELEX RICH.
Presented at "Workshop on Heavy Quark Physics at C-Zero",
Fermilab, December 5, 1996
Cherenkov Light - Phenomenology & Practice.
Academic Lecture Series, Fermilab, April 11, 1996
1995
SELEX.
E815 Students Seminar, Fermilab, February 2, 1995
Charming Nucleons - Production and Decay Properties of Charmed Baryons
in current Experiments.
Colloquium Instituto de Fisica Universidad Autonoma de San Luis Potosi
San Luis Potosi, SLP Mexico, January 17, 1995
Charming Nucleons - Production and Decay Properties of Charmed Baryons
in current Experiments.
Colloquium Instituto de Fisica Universidad de Guanojuato,
Leon, Gto Mexico, January 13, 1995
1994
The E781 Trigger and Data Acquisition System.
Presented at "CHARM2000 Workshop", Fermilab, June 8, 1994
1993
Charmed Baryons - Why we are looking for them and how do we find them.
Colloquium University of Iowa, Iowa City, November 22, 1993
The CERN Omega RICH - Particle Identification in WA89.
"Food for Thought" Seminar, Fermilab, June 9, 1993
1992
Einsatz eines Ringabbildenden Cherenkovzahlers zur Suche nach dem
exotischen Zustand U(3100).
Seminar Heidelberg University, January 13, 1992
1991
The CERN Hyperon Beam Experiment WA89 - a modern spectrometer for fixed
target physics.
PSI / Univ. Zurich / ETH Zurich combined colloquium, July 19, 1991
Teilchenidentifizierung im RICH-Zahler des Hyperonstrahlexperiments
WA89.
Presented at "DPG Fruhjahrstagung", Aachen, March 1991
1987
Ortsbestimmung durch Ladungsteilung - Messungen an langen
Zahldrahten mit dem DL300 FADC System.
Seminar Heidelberg University, May 11, 1987
Messung der Signalladung und der Ladungsteilung an langen
Zahldrahten mit dem DL300 FADC System.
Presented at "DPG Fruhjahrstagung", Zurich, March 1987
1986
Untersuchungen von Digitalisierungseigenschaften verschiedener Flash-ADCs
zur Driftkammerauslese.
Presented at "DPG Fruhjahrstagung", Heidelberg, March 1986
1985
Methoden und Ergebnisse der Elementarteilchenphysik
"Physikaliasches Gespraech", GSG Fellbach, March 24, 1985