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Implicit pairs for boosting unpaired image-to-image translation

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Visual Informatics 2020年第4期4卷 50-58页

作者： Yiftach Ginger Dov Danon hadar.aver.uch-elor.daniel cohen-or Tel Aviv University Israel

In image-to-image translation the goal is to learn a mapping from one image domain to *** the case of supervised approaches the mapping is learned from paired ***,collecting large sets of image pairs is often either prohibitively expensive or not *** a result,in recent years more attention has been given to techniques that learn the mapping from unpaired *** our work,we show that injecting implicit pairs into unpaired sets strengthens the mapping between the two domains,improves the compatibility of their distributions,and leads to performance boosting of unsupervised techniques by up to 12%across several *** competence of the implicit pairs is further displayed with the use of pseudo-pairs,i.e.,paired samples which only approximate a real *** demonstrate the effect of the approximated implicit samples on image-to-image translation problems,where such pseudo-pairs may be synthesized in one direction,but not in the *** further show that pseudo-pairs are significantly more effective as implicit pairs in an unpaired setting,than directly using them explicitly in a paired setting.

关键词： Generative adversarial networks Image-to-image translation Data augmentation Synthetic samples

Superior antibody and membrane protein‑specific T‑cell responses to CoronaVac by intradermal versus intramuscular routes in adolescents

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World Journal of Pediatrics 2024年第4期20卷 353-370页

作者： Jaime S.Rosa Duque Samuel M.S.Cheng Carolyn A.cohen daniel Leung Xiwei Wang Xiaofeng Mu Yuet Chung Tsun Ming Lau Manni Wang Wenyue Zhang Yanmei Zhang Howard H.W.Wong Leo C.H.Tsang Sara Chaothai Tsz Chun Kwan John K.C.Li Karl C.K.Chan Leo L.H.Luk Jenson C.H.Ho Wing Yan Li Amos M.T.Lee Jennifer H.Y.Lam Sau Man Chan Wilfred H.S.Wong Issan Y.S.Tam Masashi Mori Sophie A.Valkenburg Malik Peiris Wenwei Tu Yu Lung Lau Department of Paediatrics and Adolescent Medicine The University of Hong KongHong KongChina School of Public Health The University of Hong KongHong KongChina HKU‑Pasteur Research Pole School of Public HealthThe University of Hong KongHong KongChina Research Institute for Bioresources and Biotechnology Ishikawa Prefectural UniversityNonoichiJapan Department of Microbiology and Immunology Peter Doherty Institute for Infectionand ImmunityUniversity of MelbourneMelbourneVICAustralia Center for Immunology and Infection C2i Hong KongChina

Background Optimising the immunogenicity of COVID-19 vaccines to improve their protection against disease is *** dosing by intradermal(ID)administration has been shown to be equally immunogenic as intramuscular(IM)administration for several vaccines,but the immunogenicity of ID inactivated whole severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)at the full dose is *** study(NCT04800133)investigated the superiority of antibody and T-cell responses of full-dose CoronaVac by ID over IM administration in *** Participants aged 11–17 years received two doses of IM or ID vaccine,followed by the 3rd dose 13–42 days *** and cellular immunogenicity outcomes were measured post-dose 2(IM-CC versus ID-CC)and post-dose 3(IMCCC versus ID-CCC).Doses 2 and 3 were administered to 173 and 104 adolescents,*** Spike protein(S)immunoglobulin G(IgG),S-receptor-binding domain(RBD)IgG,S IgG Fcγreceptor IIIa(FcγRIIIa)-binding,SNM[sum of individual(S),nucleocapsid protein(N),and membrane protein(M)peptide pool]-specific interleukin-2(IL-2)+CD4^(+),SNM-specific IL-2^(+)CD8^(+),S-specific IL-2^(+)CD8^(+),N-specific IL-2^(+)CD4^(+),N-specific IL-2^(+)CD8^(+)and M-specific IL-2^(+)CD4^(+)responses fulfilled the superior and non-inferior criteria for ID-CC compared to IM-CC,whereas IgG avidity was *** ID-CCC,S-RBD IgG,surrogate virus neutralisation test,90%plaque reduction neutralisation titre(PRNT90),PRNT50,S IgG avidity,S IgG FcγRIIIa-binding,M-specific IL-2^(+)CD4^(+),interferon-γ+CD8^(+)and IL-2^(+)CD8^(+)responses were superior and non-inferior to *** estimated vaccine efficacies were 49%,52%,66%and 79%for IM-CC,ID-CC,IM-CCC and ID-CCC,*** ID groups reported more local,mild adverse *** This is the first study to demonstrate superior antibody and M-specific T-cell responses by ID inactivated SARSCoV-2 vaccination and serves as the basis for future research to improve the

关键词： CoronaVac Coronavirus disease 2019 Immunity Intradermal Vaccine

Delivery Outcomes in Non-Tertiary Referral Centers for Women with Congenital Heart Disease

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Congenital Heart Disease 2023年第3期18卷 315-323页

作者： daniel Sweeney Scott cohen Salil Ginde Jennifer Gerardin Peter Bartz Matthew Buelow Medical College of Wisconsin MilwaukeeWIUSA Department of Pediatrics Medical College of WisconsinMilwaukeeWIUSA Department of Internal Medicine Medical College of WisconsinMilwaukeeWIUSA

Background:Women with congenital heart disease(CHD)have increased risk for adverse events during pregnancy and *** studies have assessed pregnancy and delivery outcomes at tertiary referral centers(TRC).The aim of our study was to assess pregnancy outcomes in women with CHD who deliver in a non-tertiary referral center(non-TRC).Methods:Clinical demographics were collected,including anatomic complexity,physiologic state and pre-pregnancy risk *** were stratified by delivery location,either TRC or *** and neonatal complications of pregnancy were ***:Women with CHD who delivered in a TRC had a higher pre-pregnancy risk when assessed by the Zahar and CARPREG-II scores,and had more patients fall into a higher WHO *** was no difference in rates of maternal cardiac complications between delivery locations(11%)and neonatal complications(20%)between deliveries at TRC and ***:There were not increased maternal cardiac or neonatal complications when delivery occurred at a *** complications remained high regardless of delivery *** study suggests that proper risk assessment may help identify women who are candidates for safe delivery at non-TRC in women with CHD,and that neonatal resources should be considered when planning delivery location.

关键词： Congenital heart disease pregnancy delivery outcome

Space Deformations,Surface Deformations and the Opportunities In-Between

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Journal of Computer Science & Technology 2009年第1期24卷 2-5页

作者： daniel cohen-Or School of Computer Science Tel-Aviv UniversityIsrael

In recent years we have witnessed a large interest in surface deformation techniques. This has been a reaction that can be attributed to the ability to develop techniques which are detail-preserving. Space deformation techniques, on the other hand, received less attention, but nevertheless they have many advantages over surface-based techniques. This paper explores the potential of these two approaches to deformation and discusses the opportunities that the fusion of the two may lead to.

关键词： space deformation mesh editing digital surfaces

Prior abdominal surgery as a potential risk factor for colonic diverticulosis or diverticulitis

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World Journal of Clinical Cases 2023年第35期11卷 8320-8329页

作者： Eran Ariam Vered Richter Anton Bermont Yael Sandler daniel L cohen Haim Shirin Department of Gastroenterology Kaplan Medical CenterRehovot 76100Israel The Gonczarowski Family Institute of Gastroenterology and Liver Diseases Shamir Medical CenterZerifin 70300Israel and the Faculty of MedicineTel Aviv UniversityTel AvivIsrael Department of Surgery Division Shamir Medical CenterZerifin 70300Israel

BACKGROUND Abnormal colonic pressure profiles have been associated with an increased risk of colonic diverticulosis.A surgical history is a known risk factor for abdominal adhesions and these may lead to increased intraluminal colonic *** To assess whether previous abdominal surgery is associated with colonic divertic-ulosis or *** We analyzed data from a study of patients undergoing colonoscopy for different indications from 2020 through *** completed a structured question-naire concerning previous abdominal surgeries,dietary and lifestyle exposures including smoking,alcohol use and *** Three hundred and fifty-nine patients were included in the *** mean age was 67.6 and 46%were *** mellitus,hypertension,ischemic heart disease,chronic obstructive pulmonary disease,chronic renal failure,and body mass index were similar in the diverticulosis and control *** overall prevalence of colonic diverticulosis was 25%(91/359)and 48%of the patients had previous abdominal *** expected,the prevalence of diverticulosis increased with *** was no difference in the rate of previous abdominal surgery between patients with or without diverticulosis(49%vs 47%,P=0.78).In regards to specific surgeries,inguinal hernia repair was significantly associated with diverticulosis(52%vs 20%,P=0.001),but not *** contrast,appendectomy was not associated with diverticulosis(6%vs 14%,P=0.048).CONCLUSION These findings suggest that post-operative abdominal adhesions inducing high colonic intraluminal pressures do not appear to be the mechanism for diverticula ***,inguinal hernia and diverticulosis may share similar connective tissue pathologies with no causative relationship between them.

关键词： Diverticulosis Diverticulitis General surgery Adhesions Risk factors Abdomen

Image resizing by reconstruction from deep features

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Computational Visual Media 2021年第4期7卷 453-466页

作者： Dov Danon Moab Arar daniel cohen-Or Ariel Shamir Tel Aviv University Tel Aviv69978Israel The Interdisciplinary Center Herzliya Herzliya4610101

Traditional image resizing methods usually work in pixel space and use various saliency *** challenge is to adjust the image shape while trying to preserve important *** this paper we perform image resizing in feature space using the deep layers of a neural network containing rich important semantic *** directly adjust the image feature maps,extracted from a pre-trained classification network,and reconstruct the resized image using neuralnetwork based *** novel approach leverages the hierarchical encoding of the network,and in particular,the high-level discriminative power of its deeper layers,that can recognize semantic regions and objects,thereby allowing maintenance of their aspect *** use of reconstruction from deep features results in less noticeable artifacts than use of imagespace resizing *** evaluate our method on benchmarks,compare it to alternative approaches,and demonstrate its strengths on challenging images.

关键词： image retargeting reconstruction deep seam carving image resizing

Dance to the beat： Synchronizing motion to audio

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Computational Visual Media 2018年第3期4卷 197-208页

作者： Rachele Bellini Yanir Kleimani daniel cohen-Or Tel Aviv University Tel Aviv 6997801 Israel.

In this paper we introduce a video post-processing method that enhances the rhythm of a dancing performance,in the sense that the dancing movements are more in time to the beat of the *** dancing performance as observed in a video is analyzed and segmented into motion intervals delimited by motion *** present an image-space method to extract the motion beats of a video by detecting frames at which there is a significant change in direction or motion *** motion beats are then synchronized with the music beats such that as many beats as possible are matched with as little as possible time-warping distortion to the *** show two applications for this cross-media synchronization:one where a given dance performance is enhanced to be better synchronized with its original music,and one where a given dance video is automatically adapted to be synchronized with different music.

关键词：舞蹈表演音乐艺术音乐同步发展现状

ExquiMo： An Exquisite Corpse Tool for Collaborative 3D Shape Design

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Journal of Computer Science & Technology 2017年第6期32卷 1138-1149页

作者： Warunika Ranaweera Parmit Chilana daniel cohen-Or Hao Zhang School of Computer Science Simon Fraser University Burnaby V5A 1S6 Canada Department of Computer Science Tel-Aviv University Tel Aviv 69978 Israel

We introduce ExquiMo, a collaborative modeling tool which enables novice users to work together to generate interesting, and even creative, 3D shapes. Inspired by an Exquisite Corpse gameplay, our tool allocates distinct parts of a shape to multiple players who model the assigned parts in a sequence. Our approach is motivated by the understanding that effective surprise leads to creative outcomes. Hence, to maintain the surprise factor of the output, we conceal the previously modeled parts from the most recent player. Part designs from individual players are fused together to produce an often unexpected and novel end result. We investigate the effectiveness of collaboration on the output designs by conducting a sequence of user studies to validate the hypotheses formed based on our research questions. Results of the user studies are supportive of our hypotheses that multi-user collaborative 3D modeling via ExquiMo tends to lead to more creative novice designs according to the commonly used criteria for creativity： novelty and surprise.

关键词： 3D shape design human computer interaction collaborative creativity

Temporal scatterplots

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Computational Visual Media 2020年第4期6卷 385-400页

作者： Or Patashnik Min Lu Amit H.Bermano daniel cohen-Or Tel-Aviv University Tel-AvivIsrael Shenzhen University ShenzhenChina

Visualizing high-dimensional data on a 2D canvas is generally *** becomes significantly more difficult when multiple time-steps are to be presented,as the visual clutter quickly ***,the challenge to perceive the significant temporal evolution is even *** this paper,we present a method to plot temporal high-dimensional data in a static scatterplot;it uses the established PCA technique to project data from multiple *** key idea is to extend each individual displacement prior to applying PCA,so as to skew the projection process,and to set a projection plane that balances the directions of temporal change and spatial *** present numerous examples and various visual cues to highlight the data trajectories,and demonstrate the effectiveness of the method for visualizing temporal data.

关键词： scatterplot temporal data visual clutter principle component analysis(PCA)