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  1. Article ; Online: High-precision regressors for particle physics.

    Bishara, Fady / Paul, Ayan / Dy, Jennifer

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 5294

    Abstract: Monte Carlo simulations of physics processes at particle colliders like the Large Hadron Collider at CERN take up a major fraction of the computational budget. For some simulations, a single data point takes seconds, minutes, or even hours to compute ... ...

    Abstract Monte Carlo simulations of physics processes at particle colliders like the Large Hadron Collider at CERN take up a major fraction of the computational budget. For some simulations, a single data point takes seconds, minutes, or even hours to compute from first principles. Since the necessary number of data points per simulation is on the order of
    Language English
    Publishing date 2024-03-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-52941-4
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  2. Book ; Online: High-precision regressors for particle physics

    Bishara, Fady / Paul, Ayan / Dy, Jennifer

    2023  

    Abstract: Monte Carlo simulations of physics processes at particle colliders like the Large Hadron Collider at CERN take up a major fraction of the computational budget. For some simulations, a single data point takes seconds, minutes, or even hours to compute ... ...

    Abstract Monte Carlo simulations of physics processes at particle colliders like the Large Hadron Collider at CERN take up a major fraction of the computational budget. For some simulations, a single data point takes seconds, minutes, or even hours to compute from first principles. Since the necessary number of data points per simulation is on the order of $10^9$ - $10^{12}$, machine learning regressors can be used in place of physics simulators to significantly reduce this computational burden. However, this task requires high-precision regressors that can deliver data with relative errors of less than $1\%$ or even $0.1\%$ over the entire domain of the function. In this paper, we develop optimal training strategies and tune various machine learning regressors to satisfy the high-precision requirement. We leverage symmetry arguments from particle physics to optimize the performance of the regressors. Inspired by ResNets, we design a Deep Neural Network with skip connections that outperform fully connected Deep Neural Networks. We find that at lower dimensions, boosted decision trees far outperform neural networks while at higher dimensions neural networks perform significantly better. We show that these regressors can speed up simulations by a factor of $10^3$ - $10^6$ over the first-principles computations currently used in Monte Carlo simulations. Additionally, using symmetry arguments derived from particle physics, we reduce the number of regressors necessary for each simulation by an order of magnitude. Our work can significantly reduce the training and storage burden of Monte Carlo simulations at current and future collider experiments.

    Comment: 15 pages, 7 figure and 2 tables
    Keywords Physics - Computational Physics ; Computer Science - Machine Learning ; High Energy Physics - Experiment ; High Energy Physics - Phenomenology ; Statistics - Machine Learning
    Subject code 006
    Publishing date 2023-02-02
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Higgs pair production in vector-boson fusion at the LHC and beyond.

    Bishara, Fady / Contino, Roberto / Rojo, Juan

    The European physical journal. C, Particles and fields

    2017  Volume 77, Issue 7, Page(s) 481

    Abstract: The production of pairs of Higgs bosons at hadron colliders provides unique information on the Higgs sector and on the mechanism underlying electroweak symmetry breaking (EWSB). Most studies have concentrated on the gluon-fusion production mode which has ...

    Abstract The production of pairs of Higgs bosons at hadron colliders provides unique information on the Higgs sector and on the mechanism underlying electroweak symmetry breaking (EWSB). Most studies have concentrated on the gluon-fusion production mode which has the largest cross section. However, despite its small production rate, the vector-boson fusion channel can also be relevant since even small modifications of the Higgs couplings to vector bosons induce a striking increase of the cross section as a function of the invariant mass of the Higgs boson pair. In this work we exploit this unique signature to propose a strategy to extract the
    Language English
    Publishing date 2017-07-19
    Publishing country France
    Document type Journal Article
    ZDB-ID 1459069-4
    ISSN 1434-6052 ; 1434-6044
    ISSN (online) 1434-6052
    ISSN 1434-6044
    DOI 10.1140/epjc/s10052-017-5037-9
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  4. Article ; Online: Constraining Light-Quark Yukawa Couplings from Higgs Distributions.

    Bishara, Fady / Haisch, Ulrich / Monni, Pier Francesco / Re, Emanuele

    Physical review letters

    2017  Volume 118, Issue 12, Page(s) 121801

    Abstract: We propose a novel strategy to constrain the bottom and charm Yukawa couplings by exploiting Large Hadron Collider (LHC) measurements of transverse momentum distributions in Higgs production. Our method does not rely on the reconstruction of exclusive ... ...

    Abstract We propose a novel strategy to constrain the bottom and charm Yukawa couplings by exploiting Large Hadron Collider (LHC) measurements of transverse momentum distributions in Higgs production. Our method does not rely on the reconstruction of exclusive final states or heavy-flavor tagging. Compared to other proposals, it leads to an enhanced sensitivity to the Yukawa couplings due to distortions of the differential Higgs spectra from emissions which either probe quark loops or are associated with quark-initiated production. We derive constraints using data from LHC run I, and we explore the prospects of our method at future LHC runs. Finally, we comment on the possibility of bounding the strange Yukawa coupling.
    Language English
    Publishing date 2017-03-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.118.121801
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  5. Article ; Online: Letter to the Editor: Comment on Correa Iturraspe M, et al. Brachial Dermolipectomy.( Prensa Med Argent . 1954;41:2432-2436).

    Atiyeh, Bishara / Ghieh, Fadi

    Annals of plastic surgery

    2022  Volume 89, Issue 6, Page(s) 717–719

    Language English
    Publishing date 2022-10-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 423835-7
    ISSN 1536-3708 ; 0148-7043
    ISSN (online) 1536-3708
    ISSN 0148-7043
    DOI 10.1097/SAP.0000000000003303
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  6. Article ; Online: Comment on Comparison of Classic Mastopexy Method with Double-Pedicled Auto-augmentation Mastopexy with Conic-Shaped Modified Inferior Butterfly Flap.

    Atiyeh, Bishara / Ghieh, Fadi

    Aesthetic plastic surgery

    2022  Volume 47, Issue Suppl 1, Page(s) 32–36

    MeSH term(s) Humans ; Mammaplasty/methods ; Surgical Flaps
    Language English
    Publishing date 2022-04-20
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 532791-x
    ISSN 1432-5241 ; 0364-216X
    ISSN (online) 1432-5241
    ISSN 0364-216X
    DOI 10.1007/s00266-022-02881-z
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  7. Article ; Online: Evidence-Based Efficacy of Platelet-Rich Plasma in Facial Rejuvenation.

    Atiyeh, Bishara / Ghieh, Fadi

    The Journal of craniofacial surgery

    2021  Volume 32, Issue 8, Page(s) 2576–2577

    MeSH term(s) Cosmetic Techniques ; Face/surgery ; Humans ; Platelet-Rich Plasma ; Rejuvenation ; Skin Aging
    Language English
    Publishing date 2021-06-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1159501-2
    ISSN 1536-3732 ; 1049-2275
    ISSN (online) 1536-3732
    ISSN 1049-2275
    DOI 10.1097/SCS.0000000000007745
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  8. Article ; Online: Surgical Management of Platysma Bands: A Narrative Review of Evolving Concepts and Changing Techniques for Neck Rejuvenation.

    Atiyeh, Bishara / Emsieh, Saif / Oneisi, Ahmad / Hakim, Christopher / Ghieh, Fadi

    Aesthetic plastic surgery

    2023  Volume 47, Issue 5, Page(s) 1824–1834

    Abstract: Introduction: Platysmal bands are an unappealing feature of the aging face. Incomplete understanding of anatomy and physiology of platysmal bands has led to a long period of flawed or incomplete treatment. This review aims to elucidate the correct study ...

    Abstract Introduction: Platysmal bands are an unappealing feature of the aging face. Incomplete understanding of anatomy and physiology of platysmal bands has led to a long period of flawed or incomplete treatment. This review aims to elucidate the correct study of platysmal bands along with the most recent surgical treatments.
    Materials and methods: To identify all articles related to the topic of surgical management of platysmal bands, an extensive search was performed on PubMed and Medline databases for all articles related to platysmal bands from 1990 to 2023. The articles were then reviewed by 2 independent reviewers, and all relevant articles were selected. The search was narrowed down to clinical trials and cohort studies.
    Results: 6130 articles were identified, of which 21 articles matched the inclusion criteria and were selected for the study totaling 2331 patients. Different surgical procedures were mentioned. Assessment of results was mostly subjective and done by the surgeon.
    Conclusion: Composite platysma-skin flap repositioning as opposed to wide skin undermining with or without submental incisions is being gradually accepted as a valid approach, with closed platysma myotomy and platysma denervation emerging as effective less invasive surgical modalities. Nevertheless, merits of more extensive procedures involving wide skin undermining and anterior platysma plication must not be lightly forgotten.
    Level of evidence iii: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors   www.springer.com/00266 .
    MeSH term(s) Humans ; Rejuvenation/physiology ; Skin Aging ; Neck/surgery ; Superficial Musculoaponeurotic System/surgery ; Cohort Studies ; Rhytidoplasty/methods
    Language English
    Publishing date 2023-08-31
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 532791-x
    ISSN 1432-5241 ; 0364-216X
    ISSN (online) 1432-5241
    ISSN 0364-216X
    DOI 10.1007/s00266-023-03604-8
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    Zs.A 1296: Show issues Location:
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  9. Article ; Online: Safety and Efficiency of Minimally Invasive Buttock Augmentation: A Review.

    Atiyeh, Bishara / Ghieh, Fadi / Oneisi, Ahmad

    Aesthetic plastic surgery

    2022  Volume 47, Issue 1, Page(s) 245–259

    Abstract: Background: Volume restoration and enhancement of the gluteal region appearance has become nowadays a popular concern in particular for many women. Several options are available, none however are without complications and side effects. Volume ... ...

    Abstract Background: Volume restoration and enhancement of the gluteal region appearance has become nowadays a popular concern in particular for many women. Several options are available, none however are without complications and side effects. Volume enhancement with soft tissue fillers of the gluteal region is emerging as a highly attractive minimally invasive modality. It has led unfortunately to more unlicensed, nonmedical practitioners administering illicitly injections for buttock augmentation at relatively low costs.
    Materials and methods: To determine safety, efficacy, and cost effectiveness of mostly used soft-tissue fillers for buttock augmentation, a systematic literature search of PubMed, Medline, and Embase was conducted to identify the mostly used fillers for gluteal augmentation. It was complemented by searching for each of the identified filler material separately to retrieve any missed reports. References of clinical studies and trials, reviews, and consensus reports were reviewed as well for the same objective.
    Results: In the final analysis 12, mostly strongly biased clinical reports providing a low level of evidence, were identified for inclusion in the review. Two studies involved Polymethylmethacrylate (PMMA), 5 Poly-L-lactic acid, 1 Calcium hydroxyapatite and 4 hyaluronic acid filler injection. No studies were identified involving liquid silicone or Polyacrylamide hydrogel. The little available evidence provided by this review indicates that a specific brand of PMMA in Brazil has a demonstrable relatively good safety, efficiency, and cost-effectiveness record superior to surgical alloplastic gluteal augmentation or to lipofilling only when injected by experts.
    Conclusion: Gluteal augmentation with soft tissue fillers is not as simple and innocuous as advertised. Serious complications may occur. Moreover, optimal buttock contouring entails not only volume augmentation but also volume removal; thus, volume augmentation with soft tissue fillers may not be ideal. Popularizing this modality must also be approached with great care. Serious complications do occur; they become inevitable when performed illegally by non-specialized, non-authorized, and unscrupulous practitioners in non-accredited facilities. Patients must be warned that adherence to regulations is critical and that only well-trained certified experts practicing legally in accredited facilities can address safely and efficiently their concerns.
    Level of evidence iii: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
    MeSH term(s) Humans ; Female ; Cosmetic Techniques/adverse effects ; Buttocks ; Polymethyl Methacrylate ; Injections, Subcutaneous ; Drug-Related Side Effects and Adverse Reactions ; Hyaluronic Acid ; Dermal Fillers
    Chemical Substances Polymethyl Methacrylate (9011-14-7) ; Hyaluronic Acid (9004-61-9) ; Dermal Fillers
    Language English
    Publishing date 2022-08-23
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 532791-x
    ISSN 1432-5241 ; 0364-216X
    ISSN (online) 1432-5241
    ISSN 0364-216X
    DOI 10.1007/s00266-022-03049-5
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  10. Article ; Online: Comment on a Modified Superior Pedicle Mastopexy Technique with an Inferolateral-Based Auto-Augmentation Flap.

    Atiyeh, Bishara / Chahine, Fadl / Ghieh, Fadi

    Aesthetic plastic surgery

    2021  Volume 45, Issue 4, Page(s) 1969–1971

    MeSH term(s) Humans ; Mammaplasty ; Surgical Flaps
    Language English
    Publishing date 2021-02-09
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 532791-x
    ISSN 1432-5241 ; 0364-216X
    ISSN (online) 1432-5241
    ISSN 0364-216X
    DOI 10.1007/s00266-021-02166-x
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