Kaelig CASTOR - Resume - Technical Project Manager - Data Scientist - Senior Research Scientist - Acoustics - Machine Learning

Education

2020	Post-Master Big Data, Telecom Paris, Institut Polytechnique de Paris, France
2003	PostDoc, Marine Physical Laboratory, Scripps Institution of Oceanography, University of California San Diego, USA
2001	PhD in Acoustics, LAUM, University of Le Mans, France
1997	DEA d'Acoustique Appliquée, University of Le Mans, France
1996	Maîtrise de Physique et Applications, University of Paris XI-Orsay, France

Professional Experience

2022-2023

Technical Project Manager

Avnir Energy, Lyon, FRANCE

Project : R&D Measurement campaign at sea for Sercel, Saint-Gaudens, France

Description :
Organisation and direction of a measurement campaign in the Mediterranean Sea to characterize the new marine acoustic source for seismic imaging called TPS (Tuned-Pulse Source).

Other projects :
- Qualification engineering projects for Siemens, EDF, CEA, Valiance-Fayat Energie services.
- R&D project : SMR inspection methods for Naarea.
- Test supervision for Segault, Niedax.
- Vibration analysis at Sopemea.

2021

(6 months)

Data Scientist

Praexo, Paris, FRANCE

Project : Recommender systems

Keywords :
- Investor targeting for private capital raising.
- Feed forward neural network (keras) and gradient boosting methods (XGBoost, LightGBM).

Project : Feedback classification

Keywords :
- Text summarization, sentiment analysis, text classification.
- NLP using spaCy, nltk, Bert libraries.

> Thesis report (in french) - Post-Master Degree in Data Science - Telecom Paris
> Thesis defense (in french) - Post-Master Degree in Data Science - Telecom Paris

2007-2019

Senior Research Scientist

Land Data Acquisition Business Line, Research Department, Compagnie Generale de Geophysique
CGG, Massy, FRANCE

Research Subject : Broadband Vibroseis Source

Keywords :
- Software development called EmphaSeis (TM) that designs optimized source signal while accounting for vibrator limitations.
- Embedded systems in vibroseismic acquisition crews for earth subsurface imaging.
- Drastic improvement in the fidelity and consistency of the acoustic source (noise cancellation).

Award/Distinction :
1st price in Technological Innovation CGG 2015 " Above and beyond " for a method called CleanSweep (TM) that lowers significantly the harmonic noise in the vibroseismic source. It rewards the successful accomplishment in the project initialization, development, industrialization, and commercialization. (marketing flyer)

Collaboration :
John Sallas

> details

Research Subject : Simultaneous Source Acquisition and Deblending

Keywords :
- New source encoding method based on instantaneous frequency modulation.
- Signal processing on extensive field datasets.

Collaboration :
John Sallas

Operational Duties : Operational and technical supervision of crew startups and large-scale field tests for numerous major oil companies (Saudi Aramco, Qatar Petroleum, Shell, Total, PetroBras, ENI, Repsol, Apache, Khalda, PDO, Sonatrach, OMV, MedcoEnergi, RoanResources, Cimarex,...).

2004-2006

Research Engineer

Département Analyse Surveillance Environnement, Commissariat à l'Energie Atomique
DASE, CEA, Bruyères-le-Châtel, FRANCE

Subject : 3D acoustic propagation modeling in a realistic oceanic environment using a parallel parabolic algorithm

Keywords : 3D Wide Angle Parabolic Equation (3DWAPE), numerical simulations, hydroacoustics, horizontal refraction, global oceanographic data base, International Monitoring System, multiprocessing computation, MPI.

Collaborations : Frédéric Sturm, MdC, LMFA, Ecole Centrale de Lyon

> details

Subject : Nonlinear acoustic propagation in the atmosphere

Keywords : Nonlinear Progressive wave Equation (NPE), numerical simulations, infrasounds, shock wave, long-range propagation.

Collaborations :
The MOPA workshop (Modélisation de la Propagation Acoustique) includes CEA, LMFA from Ecole Centrale de Lyon, and LMM from University of Paris 6. (Régis Marchiano, MdC, LMM, Univ. Paris 6)

> some examples of outdoor propagation simulations

2001-2003

PostDoc

Marine Physical Laboratory, Scripps Institution of Oceanography, University of California, San Diego
MPL, SIO, UCSD, La Jolla, USA

Subject : Nonlinear acoustic propagation in an ocean waveguide

Keywords :

Nonlinear Progressive wave Equation (NPE), numerical simulations, shock wave, long-range propagation, parametric interaction, harmonics, modes dispersion.

Supervised by :

William A. Kuperman.

Collaborations :
B. Ed. McDonald, US Naval Research Laboratory, Office Naval Research, Washington DC, USA

> some examples of nonlinear acoustic propagation in an ocean waveguide

1997-2001

PhD in Acoustics

Laboratoire d'Acoustique de l'Université du Maine
LAUM, Le Mans, France

Subject : Characterization of acoustic sources associated with negatives corona discharges

Keywords : Acoustics, loudspeaker, electroacoustics, corona discharges, ionised gas, acoustic and electric models, acoustic and electric measurements, electroacoustic efficiency, parametric study, harmonic distorsion, electric interactions, acoustics with flow.

Supervised by : Philippe Béquin and Michel Bruneau.

> details

1997

(4 month)

Research project

Laboratoire Ondes et Acoustique de l'Ecole Supérieure de Physique et de Chimie Industrielles de Paris
LOA, ESPCI, Paris, France

Subject : Propagation of acoustic waves into multi-scales middles - modelisation, simulations and experimental validations

Keywords : Acoustical propagation, waveguide, fractal structure, impedance, acoustic filter, random structure.

Supervised by : Vincent Gibiat.

> details

1996

(3 month)

Research project

Laboratoire d'Acoustique du Conservatoire National des Arts et Métiers, Paris
Acoustics Lab., CNAM, Paris

Subject : Suspension modeling for a microphone used in movie sound recording

Keywords : Vibrations, Lagrangian formalism, solidian transmission, numerical simulations, transmissibility measurements

Supervised by : Alexandre Garcia and Philippe Chenevez.

> details

1995

(1 month)

Research project

Laboratoire de Physique des Hautes Energies à l'Ecole Polytechnique
LPNHE-X, Palaiseau, FRANCE

Subject : Antimatter detection in telescopic mesurements of cosmic radiations

Keywords : Cosmic radiations, Cerenkov effect, particle detection.

Supervised by : Marcel Urban.

> details

Communications

Patents

	Sallas J., Castor K.,	paper
	Seismic Source and Method for Intermodulation Mitigation, US 20140114578 (16.10.2013).	paper

	Castor K., Bianchi T., Sallas J.,	paper
	Instantaneous Frequency Modulation Acquisition Scheme for Seismic Sources, WO 2014/207074 A1 (27.06.2013).	paper

	Castor K., Winter O., Bianchi T., Klein T.,	paper
	Systems and methods for reducing noise in a seismic vibratory source, US WO/2015/097557 (02.07.2015).	paper

Publications in International Peer-Reviewed Journals

	Gibiat V., Barjau A., Castor K., Bertaud du Chazaud E.,	paper
	Acoustical propagation in a prefractal wave-guide, Physical Review E, vol. 67, 066609 (2003).	paper

	Bequin Ph., Castor K., Scholten J.,	paper
	Electric wind characterisation in negative point-to-plane corona discharges in air, Eur. Phys. J. - AP 22, 41-49 (2003).	paper

	Castor K., Gerstoft P., Roux Ph., McDonald B. E., Kuperman W. A.,	paper
	Long Range Propagation of Finite Amplitude Acoustic Waves in an Ocean Waveguide, J. Acoust. Soc. Am., vol. 116, pp. 2004-2010 (2004).	paper

	Béquin Ph., Castor K., Herzog Ph., Montembault V.,	paper
	Modeling of Plasma Loudspeakers, J. Acoust. Soc. Am., vol. 121, pp. 1960-1970 (2007).	paper

	Castor K., Sturm F.,	paper
	Investigation of 3-D acoustical effets using a multiprocessing parabolic equation based algorithm, J. Comp. Acoust., vol. 16, pp. 137-162 (2008).	paper

Conferences with Proceedings

Castor K., Béquin Ph.,	paper
Rendement d'un haut-parleur à décharges corona négatives,
Congrès Français d'Acoustique, Lausanne, Switzerland, september 2000.

Castor K., Béquin Ph.,	paper	abstract
Acoustical behaviour of the negative point-to-plane corona discharges,
17th International Congress on Acoustics, Rome, Italy, september 2001.

Castor K., McDonald B. E., Kuperman W. A.,	paper	talk
Equations of nonlinear acoustics and weak shock propagation,
16th International Symposium on Nonlinear Acoustics, Moscow, Russia, august 2002.

Castor K., Gerstoft P., Kuperman W. A., McDonald B. E., Gerald L. D'Spain,	paper	poster
Nonlinear effects in long range propagation,
24th Seismic Research Review, Jacksonville, USA, september 2002.

Castor K., Sturm F., Piserchia P. F.,	paper
Analysis of 3-D Acoustical Effects in a Realistic Oceanic Environment,
Underwater Acoustic Measurements: Technologies and Results Int. Conf., Heraklion, Crete, Greece, june 2005.

Bequin Ph., Castor K.,	paper	abstract
Etude du comportement non linéaire d'un haut-parleur à gaz ionisé,
8ème Congrès Français d'Acoustique, Tours, France, april 24-27 2006.

Castor K., Bianchi T., Winter O., Klein T.	paper	talk
Noise Reduction in VibroSeis source,
84th SEG Annual Meeting, Denver, USA, October 2014.

Castor K., Bianchi T., Winter O., Klein T.	paper	talk
Efficient Harmonic-Distortion Mitigation on Vibro-Seismic Sources,
EAGE Workshop on Broadband Seismic, Abu Dhabi, United Arab Emirates, November 2015.

Saleh A., El Fiki A., Rodriguez J. M., Laroche S., Castor K., Marin D., Bianchi T., Bertrand P., Herrmann P.	paper	talk
A Step Change in Seismic Imaging Quality in Western Desert of Egypt: An Acquisition case Study,
79th EAGE Annual Meeting, Paris, France, June 2017.

Bianchi T., Castor K., Cotton J., Hardouin P.	paper	talk
Random Sampling Compressive Sensing Acquisition,
SEG workshop: Seismic with Simultaneous Sources: Where Does the Industry Stand? Muscat, Oman, Nov. 2017.

Other Relevant Communications

Castor K., Montembault V., Béquin Ph.,
Ionic loudspeaker using negatives point-plane discharges,
3rd International Student Conference on Electrical Engineering, Prague, Czech Republic, may 1998.

Castor K., Gerstoft P., Roux Ph., Kuperman W. A., McDonald B. E.,	abstract	presentation including movies
Nonlinear effects in long range propagation,
144th Meeting of the Acoustical Society of America - 1st Pan-American/Iberian Meeting on Acoustics, Cancun, Mexico, december 2002.

Castor K., Roux Ph., Gerstoft P., Kuperman W. A., McDonald B. E.,	abstract	talk
Nonlinear modes interaction in an acoustics waveguide,
146th Meeting of the Acoustical Society of America, Austin, USA, nov. 2003.

Castor K., Gerstoft P., Roux Ph., Kuperman W. A., McDonald B. E.,	poster	workshop report
Long range propagation of finite amplitude acoustic waves in an ocean waveguide,
T-phase Workshop: "Seismo-Acoustic Applications in Marine Geology and Geophysics", Woods Hole Oceanographic Institution, MA, USA, march 2004.

Castor K., Sturm F., Piserchia P. F.,	abstract
Acoustical propagation modeling using the three-dimensional parabolic equation based code 3DWAPE within a multiprocessing environment,
148th Meeting of the Acoustical Society of America, San Diego, USA, nov. 2004.

Castor K., Sturm F., Piserchia P. F.,
Development of numerical acoustical tools for hydroacoustic monitoring,
Comprehensive nuclear-Test-Ban Treaty Organisation Hydroacoustics Workshop, Victoria, British Columbia, Canada, 2-5 may 2005.

Sturm F., Castor K.
Examination of 3-D acoustical effects for the ASA wedge benchmark at higher frequencies using a multiprocessing parabolic equation code,
1st Greek-French Workshop on Computational Aspects of Acoustical Propagation, Heraklion, Greece, 20-21 sept. 2006.

Teaching

1997-2001

Teaching Assistant,
University of Le Mans, France (182 hours).

Discipline	*Type ()**	Level	Years	Nb. of hours
Mechanics	L	Deust-Vas 2nd degree	2000-01 1999-00	20H 20H
Physical and general acoustics	P	Deust-Vas 2nd degree	2000-01 1999-00	20H 20H
Physical and general acoustics	P	Deust-Vas 2nd degree	1998-99 1997-98	20H 20H
ElectroAcoustics, Electronics	L	Deust-Vas 2nd degree	2000-01 1999-00 1998-99 1997-98	21H 15H 15H 15H
ElectroAcoustics, Electronics	P	Deust-Vas 2nd degree	2000-01	48H
Physical and general acoustics	L	Deust-Vas 1rst degree	1999-00 1998-99	15H 15H
Physical and general acoustics	P	Master in applied acoustics	1998-99 1997-98	12H 12H
Support (signal processing, electromagnetism, mathematics, analogical electronics, electroacoustics)	L	Deust-Vas 1rst degree	1998-99 1997-98	4H 24H
Vibrations	L	Deust-Vas 1rst degree	1998-99	8H
Vibrations	P	Deust-Vas 2nd degree	1997-98	12H
*() L = Lectures (classroom), P = Practical Works (laboratory experiment instructor)**

Languages

French	native language
English	fluent (studied for 10 years, lived 2 years in the US, daily usage)
Spanish	fluent (studied for 5 years, several months spent in Spain, Mexico and South America)
Portuguese	basics (several months spent in Brasil)

Computer Skills

Languages	Python, C++, Fortran

Software Development Skills
Math and Digital Signal Processing	Matlab, R, Java, C++, Mapple, Mathematica, Paw
Machine Learning, DL, NLP	Scikit Learn, Keras, SpaCy, TensorFlow, PyTorch
Project Management	Atlassian Jira, Confluence, Trello
Software Deployment	Perforce, Git, Docker
Cloud	AWS (S3, EC2, EMR), GCP
Data	Hadoop, MapReduce, Kafka, Yarn, Spark, MySQL, PostgreSQL, Cassandra, Neo4j, MongoDB, Hbase
Laboratory Instrumentation Interfacing	HP-Vee, Labview
Acoustic Propagation Modeling	ONR Ocean Acoustic Library (OALIB) (Rays, Normal Modes, Parabolic Equation, Wavenumber Integration), Nonlinear Parabolic Equation (NPE, KZK), 3-D Parabolic Equation (3DWAPE)
Sound Design and Audio Production	Cubase SX, Nuendo, Reason, Ableton Live, Samplitude, Sonar, Logic Audio, Gigasampler, Soundforge

Additional Skills

Licences and Certifications

Qualification for lecturer functions	Section 60 : Mechanics, mechanical engineering, civil engineering. By decision dated February 8, 2002.

BOSIET & HUET	Basic Offshore Safety Induction and Emergency Training (BOSIET & HUET) delivered by Survie Mer Formation" (Sea Survival Training) in march 2022. Expires in march 2027. Certification Identification : 104/22.

Volunteer Work (Arts and culture)	Head of the Music Section in the CGG Works Committee (Sep. 2011 - Sep 2019) - Management of music-related initiatives within the company. - Negotiation and management of the annual budget. - Recruitment of music teachers for piano, guitar, and harmonica. - Procurement of all equipment, including a complete music studio setup. - Room Planning and Management. - Organizing events within the company, such as music festivals.

Hobbies

Music

Saxophonist in brass bands. Drummer in a jazz quintet. Learning jazz piano, practicing bass guitar, and enjoying music composition and home recording.