Research Projects

AI/ML Projects at ZHAW

DIR3CT (2020-)

Project DIR3CT aims at improving the image quality of cone-beam CT images by deep learning the 3D reconstruction from X-ray images end-to-end. This enables a novel cone-beam CT product to be used during radiation therapy and will allow the use of these images for adaptive treatment.

RealScore (2019-)

In the predecessor project DeepScore, a deep-learning framework to digitize printed or scanned music sheets and convert them to MusicXML format was developed. The successor project RealScore enhances the successful predecessor project by making deep learning adapt to unseen data through unsupervised learning.

FWA (2019-)

A novel approach for a fully automated food waste management solution for commercial kitchens is investigated. Food waste is automatically detected using a new camera device, preprocessed in real-time and classified using machine learning algorithms.

QualitAI (2018-)

QualitAI researches and develops a device for automatic quality control of industrial products like e.g. cardial ballon catheters. This will be facilitated through innovation in the area of artificial intelligence, especially by analyzing camera images using Deep Learning.

(Schilling & Stadelmann, 2019) (Amirian et al., 2020)

Particle Physics with the CMS Experiment at CERN

Higgs Boson Physics (2012-2014)

Search for the Higgs boson in associated WH->lnubb production mode; focus on boosted regime at large pT(H); use of jet sub-structure and jet energy regression algorithms; multi-variate analysis using NN/BDT. This channel contributed to the observation of the Higgs boson in 2012, the prediction of which was awarded with the Nobel Prize in Physics in 2013.

(Chatrchyan & others, 2012) (Chatrchyan & others, 2012) (Chatrchyan & others, 2013) (Chatrchyan & others, 2014) (Chatrchyan & others, 2014)

Top Quark Physics (2007-2012)

Convenor of the CMS top quark physics analysis group: steering research program using initial LHC data, carried out by approx 200 physicists from around the world; coordinated several journal publications and many conference results (2010-2011)

(Chatrchyan & others, 2017) (Chatrchyan & others, 2012) (Chatrchyan & others, 2011) (Chatrchyan & others, 2011) (Chatrchyan & others, 2011) (Khachatryan & others, 2011)

Major role in re-discovery of the top quark at the LHC; leading top quark cross section measurements in lepton+jets topologies; first journal publication of CMS using this channel (since 2009)

(Chatrchyan & others, 2012) (Chatrchyan & others, 2012) (Chatrchyan & others, 2011)

Simulation studies on early observation of top events; b-tagging in top quark events; preparation of first top cross section measurements (2007-2009)

(“Plans for an early Measurement of the t\bart Cross Section in the Electron-plus-Jets Channel at \sqrts = 10 \rm TeV,” 2009) (“Prospects for the first Measurement of the t\bart Cross Section in the Muon-plus-Jets Channel at \sqrts = 10 \rm TeV with the CMS Detector,” 2009) (“Observability of Top Quark Pair Production in the Semileptonic Muon Channel with the first 10/pb of CMS Data,” 2008)

Track Reconstruction and b-jet Identification (2004-2009)

Identification of b-jets (b-tagging): impact of misalignment on b-tagging performance; development of robust secondary vertex algorithm; supervised development of a generic multivariate framework for b-tagging; implementation of a tertiary vertex finder (2007-2009)

(“Algorithms for b Jet Identification in CMS,” 2009) (Lampen et al., 2008) (“Impact of Tracker Misalignment on the CMS b-Tagging Performance,” 2008)

V0 reconstruction: lead developer of a dedicated track seeding and reconstruction algorithm for long-lived K^0_s and Lambda^0 particles (2006)

Tracker Alignment: leading role in CMS silicon tracker alignment (approx. 100,000 unknown parameters); software framework; algorithm studies and application to full tracker; simulation of misalignment and projected startup scenarios; convenor of CMS tracker alignment group (2004-2007)

(Chatrchyan & others, 2010) (Adam & others, 2009) (Karimaki et al., 2006)

Particle Physics with the H1 Experiment at DESY

QCD Physics (1998-2006)

Main analyzer, measurement of the inclusive, triple differential cross section of diffractive DIS processes with unprecedented precision; determination of NLO diffractive PDFs (2001-2006)

(Aktas & others, 2006)

Implementation of next-to-leading order cross section calculations for diffractive final states using a novel slicing technique (used for theory predictions in several publications) (2003-2004)

(Comparison at NLO between Predictions from QCD Fits to F2D and and Diffractive Final State Observables at HERA, 2003)

Primary analyzer, measurement of differential cross sections of diffractive dijet production; detailed comparisons with QCD models (50+ citations) (1998-2001)

(Adloff & others, 2001)

Operations (1998-2004)

Central Trigger: overall trigger strategy and bandwidth allocation; integration of new trigger subsystems; trigger simulation validation; 24/7 on-call service (2001-2004)

Backward Drift Chamber Detector: 24/7 on-call service; data quality monitoring; coordiation of maintenance during shut-down periods (1998-2000)

Other Particle Physics Projects

6th Workshop on Physics at TeV Colliders, Les Houches, France (2009)

Development of common output format for NLO calculations

(Campbell et al., 2009)

HERA-LHC Workshop, DESY and CERN (2004-2006)

Development of a library of diffractive parton distributions; detailed comparisons of experimental data

(Schilling, 2005) (Newman & Schilling, 2005)