Electromagnetic physics vectorization in the GeantV transport framework

The development of the GeantV Electromagnetic (EM) physics package has evolved following two necessary paths towards code modernization. A first phase required the revision of the main electromagnetic physics models and their implementation. The main objectives were to improve their accuracy, extend them to the new high-energy frontier posed by the Future Circular Collider (FCC) programme and allow a better adaptation to a multi-particle flow. Most of the EM physics models in GeantV have been reviewed from theoretical perspective and rewritten with vector-friendly implementations, being now available in scalar mode in the alpha release. The second phase consists of a thorough investigation on the possibility to vectorise the most CPU-intensive physics code parts, such as final state sampling. We have shown the feasibility of implementing electromagnetic physics models that take advantage of SIMD/SIMT architectures, thus obtaining gains in performance. After this phase, the time has come for the GeantV project to take a step forward towards the final proof of concept. This takes shape through the testing of the full simulation chain (transport + physics + geometry) running in vectorized mode. In this paper we will present the first benchmark results obtained after vectorizing a full set of electromagnetic physics models.

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Pulling the Higgs and top needles from the jet stack with feature extended supervised tagging

The European Physical Journal C ◽

10.1140/epjc/s10052-021-09530-w ◽

2021 ◽

Vol 81 (8) ◽

Author(s):

J. A. Aguilar-Saavedra

Keyword(s):

Higgs Boson ◽

Top Quark ◽

Top Quarks ◽

High Energy ◽

New Physics ◽

Higgs Bosons ◽

Jet Substructure ◽

Final State ◽

Charged Leptons ◽

Energy Frontier

AbstractJet tagging has become an essential tool for new physics searches at the high-energy frontier. For jets that contain energetic charged leptons we introduce Feature Extended Supervised Tagging (FEST) which, in addition to jet substructure, considers the features of the charged lepton within the jet. With this method we build dedicated taggers to discriminate among boosted $$H \rightarrow \ell \nu q {\bar{q}}$$ H → ℓ ν q q ¯ , $$t \rightarrow \ell \nu b$$ t → ℓ ν b , and QCD jets (with $$\ell $$ ℓ an electron or muon). The taggers have an impressive performance, allowing for overall light jet rejection factors of $$10^4-10^5$$ 10 4 - 10 5 , for top quark/Higgs boson efficiencies of 0.5. The taggers are also excellent in the discrimination of Higgs bosons from top quarks and vice versa, for example rejecting top quarks by factors of 100–300 for Higgs boson efficiencies of 0.5. We demonstrate the potential of these taggers to improve the sensitivity to new physics by using as example a search for a new $$Z'$$ Z ′ boson decaying into ZH, in the fully-hadronic final state.

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Crystal collimator systems for high energy frontier

Physical Review Accelerators and Beams ◽

10.1103/physrevaccelbeams.20.071001 ◽

2017 ◽

Vol 20 (7) ◽

Cited By ~ 1

Author(s):

A. I. Sytov ◽

V. V. Tikhomirov ◽

A. S. Lobko

Keyword(s):

High Energy ◽

Energy Frontier

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A high-voltage aqueous lithium ion capacitor with high energy density from an alkaline–neutral electrolyte

Journal of Materials Chemistry A ◽

10.1039/c8ta11735g ◽

2019 ◽

Vol 7 (8) ◽

pp. 4110-4118 ◽

Cited By ~ 20

Author(s):

Chunyang Li ◽

Wenzhuo Wu ◽

Shuaishuai Zhang ◽

Liang He ◽

Yusong Zhu ◽

...

Keyword(s):

Energy Density ◽

High Voltage ◽

Lithium Ion ◽

High Energy ◽

High Energy Density ◽

Carbon Anode ◽

Biomass Carbon ◽

Proof Of Concept ◽

Lithium Ion Capacitor ◽

Neutral Electrolyte

A proof-of-concept lithium ion capacitor comprising LiMn2O4 nanorods as the cathode, a nitrogen-rich biomass carbon anode and a stable alkaline–neutral electrolyte was designed and fabricated.

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Development of Ni/h-BN Self-Lubricating Composite Powder by High-Energy Ball Milling

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.277 ◽

2016 ◽

Vol 869 ◽

pp. 277-282

Author(s):

Moisés Luiz Parucker ◽

César Edil da Costa ◽

Viviane Lilian Soethe

Keyword(s):

Ball Milling ◽

Milling Time ◽

Solid Lubricants ◽

High Energy ◽

High Energy Ball Milling ◽

Second Phase ◽

Average Particle ◽

Composite Powders ◽

The Matrix ◽

Energy Ball

Solid lubricants have had good acceptance when used in problem areas where the conventional lubricants cannot be applied: under extreme temperatures, high charges and in chemically reactive environments. In case of materials manufactured by powder metallurgy, particles of solid lubricants powders can be easily incorporated to the matrix volume at the mixing stage. In operation, this kind of material provides a thin layer of lubricant that prevents direct contact between the surfaces. The present study aimed at incorporating particles of second phase lubricant (h-BN) into a matrix of nickel by high-energy ball milling in order to obtain a self-lubricating composite with homogeneous phase distribution of lubricant in the matrix. Mixtures with 10 vol.% of h-BN varying the milling time of 5, 10, 15 and 20 hours and their relationship ball/powder of 20:1 were performed. The effect of milling time on the morphology and microstructure of the powders was studied by X-ray diffraction, SEM and EDS. The composite powders showed reduction in average particle size with increasing milling time and the milling higher than 5 hours resulted in equiaxial particles and the formation of nickel boride.

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The effect of soybean formula and formula 100 supplementation on the growth of preschool children

Paediatrica Indonesiana ◽

10.14238/pi45.6.2005.256-63 ◽

2016 ◽

Vol 45 (6) ◽

pp. 256

Author(s):

M Mexitalia ◽

Yohanes Tri Nugroho ◽

J C Susanto

Keyword(s):

Preschool Children ◽

Body Height ◽

High Energy ◽

Second Phase ◽

Z Score ◽

Health Food ◽

Alternative Health ◽

Second Phases ◽

The Difference ◽

Weight For Age

Background Preschool children are vulnerable in growth. Soy-bean formula (SF) and formula-100 (F100) are supplementary foodswhich contain of high energy and are available at low price; how-ever, they are not widely used for preschool children.Objectives To investigate the effect of SF compared to F100 onthe growth of preschool children.Methods A cross-over trial was conducted on 96 preschool chil-dren aged 4-7 years. Subjects were randomly divided into 2 groupswhich received 200 ml soybean formula (n=49) or F100 (n=47) for1 month and crossed-over after a six-week wash-out period. Bodyweight was measured weekly. Body height and food analysis by 3-day food recall were measured at the beginning and the end of thestudy. The criteria of the acceptability of the formula was eithergood or poor.Results Supplementation with SF as well as F100 induced catchup growth as shown by the increase of Δz-score. There were nosignificant difference of Δ weight for age z-score, Δ height for agez-score, and Δ weight for height z score between groups duringthe first and second phases of the trial. The acceptability of F100was significantly better than that of SF at the beginning; neverthe-less, the difference was not significant at the second phase trial.Conclusions Soybean formula and F100 given for a one monthperiod can induce catch-up growth in preschool children. Soybeanformula as an alternative health food can be accepted by preschoolchildren

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Final state hadronic rescattering with UrQMD

EPJ Web of Conferences ◽

10.1051/epjconf/201817105003 ◽

2018 ◽

Vol 171 ◽

pp. 05003 ◽

Cited By ~ 1

Author(s):

J. Steinheimer ◽

V. Vovchenko ◽

J. Aichelin ◽

M. Bleicher ◽

H. Stöcker

Keyword(s):

Momentum Distribution ◽

Chemical Equilibrium ◽

Transport Model ◽

Local Equilibrium ◽

High Energy ◽

Final State ◽

Nuclear Collisions ◽

Unstable Particles ◽

Realistic Description ◽

Do So

In this talk we discuss the effects of the hadronic rescattering on final state observables in high energy nuclear collisions. We do so by employing the UrQMD transport model for a realistic description of the hadronic decoupling process. The rescattering of hadrons modifies every hadronic bulk observable. For example apparent multiplicity of resonances is suppressed as compared to a chemical equilibrium freeze-out model. Stable and unstable particles change their momentum distribution by more than 30% through rescattering. The hadronic rescattering also leads to a substantial decorrelation of the conserved charge distributions. These findings show that it is all but trivial to conclude from the final state observables on the properties of the system at an earlier time where it may have been in or close to local equilibrium.

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A Reusable Perfused Human Cadaver Model for Surgical Training: An Initial Proof of Concept Study

Military Medicine ◽

10.1093/milmed/usy383 ◽

2019 ◽

Vol 184 (Supplement_1) ◽

pp. 43-47 ◽

Cited By ~ 1

Author(s):

Jenny M Held ◽

Robert B McLendon ◽

Christian S McEvoy ◽

Travis M Polk

Keyword(s):

Surgical Training ◽

Tap Water ◽

Regional Perfusion ◽

Whole Body ◽

Suture Repair ◽

Second Phase ◽

Proof Of Concept ◽

Handling Characteristics ◽

Surgical Trainees ◽

Over Time

Abstract Objectives Today’s surgical trainees have less exposure to open vascular and trauma procedures. Lightly embalmed cadavers may allow a reusable model that maximizes resources and allows for repeat surgical training over time. Methods This was a three-phased study that was conducted over several months. Segments of soft-embalmed cadaver vessels were harvested and perfused with tap water. To test durability, vessels were clamped, then an incision was made and repaired with 5-0 polypropylene. Tolerance to suturing and clamping was graded. In a second phase, both an arterial-synthetic graft and an arterial-venous anastomosis were performed and tested at 90 mmHg perfusion. In the final phase, lower extremity regional perfusion was performed and vascular control of a simulated injury was achieved. Results Seven arteries and six veins from four cadavers were explanted. All vessels accommodated suture repair over 6 weeks. There was minor leaking at all previous clamp sites. In the anastomotic phase, vessels tolerated grafting, clamping, and perfusion without tearing or leaking. Regional perfusion provided a life-like training scenario. Conclusions Explanted vessels of soft-embalmed cadavers show adequate durability over time with realistic vascular surgery handling characteristics. This shows promise as initial proof of concept for a reusable perfused cadaver model. Further study with serial regional and whole-body perfusion is warranted.

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