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Waveguide-based augmented reality displays: a highlight

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Light(Science & Applications) 2024年第1期13卷 10-12页

作者： Jannick P.rolland Jeremy Goodsell Institute of Optics University of Rochester480 Intercampus DriveRochesterNY14627USA Center for Freeform Optics University of RochesterRochesterNY14627USA Center for Visual Science University of RochesterRochesterNY14627USA

Augmented reality(AR),which emerged in the 1960s,remains a focal point of interest given its capacity to overlay the real world with digitally presented information through optical *** prevalent combiner,commonly known as the waveguide in the AR literature,is prized for its compact design and generous eyebox—essential elements in human-centric ***,these combiners encounter unique challenges in meeting various other requirements of the human visual *** paper highlights a recent review of technological advancements and presents a forward-looking perspective on the future of AR technology.

关键词： waveguide Waveguide looking

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Reform Needed

Associations between physical activity levels and ATPase inhibitory factor 1 concentrations in older adults

中国与非洲(英文版) 2021年第1期

作者： Hannah Marais Hanns Spangenberg sam rolland

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Journal of Sport and Health Science 2024年第3期13卷 409-418页

作者： Jérémy Raffin Yves rolland Annelise Genoux Guillaume Combes Mikael Croyal Bertrand Perret Sophie Guyonnet Bruno Vellas Laurent O.Martinez Philipe de Souto Barreto For the MAPT/DSA Group Institut du Vieillissement Gérontopôle de ToulouseCentre Hospitalo-Universitaire de ToulouseToulouse 31000France Centre d'Epidémiologie et de Recherche en Santédes Populations UnitéMixte de Recherche 1295Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse-III-Paul-SabatierToulouse 31000France LimitAging Team Institut des Maladies Métaboliques et CardiovasculairesUnitéMixte de Recherche 1297Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse III-Paul SabatierToulouse 31432France Service de Biochimie Pôle de biologieHôpital de PurpanCentre Hospitalo-Universitaire de ToulouseToulouse 31300France L'Institut du Thorax Institut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France BioCore US16Structure Fédérative de Recherche BonamyInstitut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France Plate-forme de spectrométrie de masse Centre de Recherche en Nutrition HumaineOuestNantes 44000France 不详

Background:Adenosine triphosphatase inhibitory factor 1(IF1)is a key protein involved in energy ***1 has been linked to various agerelated diseases,although its relationship with physical activity(PA)remains ***,the apolipoprotein A-I(apoA-I),a PA-modulated lipoprotein,could play a role in this relationship because it shares a binding site with IF1 on the cell-surface ATP *** examined here the associations between chronic PA and plasma IF1 concentrations among older adults,and we investigated whether apoA-I mediated these ***:In the present work,1096 healthy adults(63.8%females)aged 70 years and over who were involved in the Multidomain Alzheimer Prevention Trial study were ***1 plasma concentrations(square root of ng/mL)were measured at the 1-year visit of the Multidomain Alzheimer Prevention Trial,while PA levels(square root of metabolic equivalent task min/week)were assessed using questionnaires administered each year from baseline to the 3-year *** linear regressions were performed to investigate the associations between the first-year mean PA levels and IF1 *** analyses were conducted to examine whether apoA-I mediated these *** linear regressions were carried out to investigate whether the 1-year visit IF1 concentrations predicted subsequent changes in ***:Multiple linear regressions indicated that first-year mean PA levels were positively associated with IF1 concentrations(B=0.021;SE=0.010;p=0.043).Mediation analyses revealed that about 37.7%of this relationship was mediated by apoA-I(B_(ab)=0.008;SE=0.004;p=0.023).Longitudinal investigations demonstrated that higher concentrations of IF1 at the 1-year visit predicted a faster decline in PA levels over the subsequent 2 years(time×IF1:B=0.148;SE=0.066;p=0.025).Conclusion:This study demonstrates that regular PA is associated with plasma IF1 concentrations,and it suggests that apoA-I partly med

关键词： Aging Apolipoprotein Bioenergetics Exerkine Mitochondria

Depression and Suicidal Risk in HIV-Infected Adults at Brazzaville University Hospital: Prevalence and Associated Factors

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Advances in Infectious Diseases 2024年第1期14卷 24-33页

作者： Bienvenu rolland Ossibi Ibara Tatia Adoua Doukaga Alain M. Mouanga André Moukouma Martin Ekat Parfait Bintsindou Ella Angonga Pabota Princesse Benet Lebaho Bebene Damba Banzuzi Department of Infectious Diseases Brazzaville University Hospital Brazzaville Republic of the Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Republic of the Congo Department of Neurolgy Brazzaville University Hospital Brazzaville Republic of the Congo

Introduction: Highly active antiretroviral tritherapies have improved the quality of life of people living with HIV (PVVIH) and extended their life expectancy. However, the nervous system is faced with a neurotropic virus that evolves chronically, sometimes creating neurological disorders directly or indirectly linked to stigmatization or therapeutic effects. Objective: to determine the prevalence of depression associated with suicidal risk (SR) and identify associated factors. Patients and method: This was a prospective descriptive and analytical study from January 1 to November 30, 2022, including all HIV-positive patients receiving or not receiving antiretroviral therapy. The study took place in the infectious diseases department of Brazzaville University Hospital. This department has an inpatient capacity of 36 beds, and an outpatient capacity of 25 patients per day, three times a week. This is the largest center for PVVIH in Brazzaville. The Patient Heath Questionnaire 9 (PHQ-9) was used to assess the degree of depression and suicidal risk. Therapeutic adherence was assessed using the Morisky questionnaire. Data were analyzed using SPSS version 23 software. Qualitative variables were expressed as numbers and percentages, and quantitative variables as means and standard deviations. Statistical tests were used according to their applicability criteria. For all tests, the significance threshold was set at 0.05. Results: A total of 150 patients were consulted, constituting the sample size. The prevalence of depression and suicidal risk was 32%. These patients had an average age of 42.83 ± 10.24 years, were female (n = 101;67.3%), Christian (n = 97;64%), single (n = 68;45.3%). Stigmatization (n = 75;50%) was the reason for attempted suicide. HIV was perceived as treatable (n = 103;68.7%), unlucky (n = 62;41.3%). Patients were WHO stage 1 (n = 105;70%). RS was present in 47 cases (31.3%). Factors associated with depression and suicidal risk were age (p = 0.000), resi

关键词： Depression Suicidal Risk HIV/AIDS Prevalence Associated Factors

Millimeter wave band ultra wideband transmitter MMIC

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Journal of Semiconductors 2015年第9期36卷 125-130页

作者：金凌 Nathalie rolland SVA Communication Technology Co. Ltd Institut d'Electronique de Microélectronique et de NanotechnologieUSTLVilleneuve d'Ascq CedexFrance

This paper presents a new millimeter-wave （MMW） ultra wideband （UWB） transmitter MMIC which has been developed in an OMMIC 0.1 μm GaAs PHEMT foundry process （ft= 100 GHz） for 22-29 GHz vehicular radar systems. The transmitter is composed of an MMW negative resistance oscillator （NRO）, a power amplifier （PA）, and two UWB pulse generators （PGs）. In order to convert the UWB pulse signal to MMW frequency and reduce the total power consumption, the MMW NRO is driven by one of the UWB pulse generators and the power amplifier is triggered by another UWB pulse generator. The main advantages of this transmitter are： new design, simple architecture, high-precision distance measurements, infinite ON/OFF switch ratio, and low power consumption. The total power consumption of the transmitter MMIC is 218 mW with a peak output power of 5.5 dBm at 27 GHz.

关键词： millimeter-wave ultra wideband transmitter negative resistance oscillator MMIC GaAs pHEMT

An approach to viscoelastic c haracterization of dispersive media by inversion of a general wave propagation model

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Journal of Innovative Optical Health Sciences 2017年第6期10卷 73-88页

作者： Fernando Zvietcovich Jannick P.rolland Kevin J.Parker Department of Electrical and Computer Engineering University of Rochester Rochester New York 14627USA The Institute of Optics University of Rochester Rochester New York 14627USA

In the characterization of elastic properties of tissue using dynarmic optical coherence elasto-graphy,shear/surface waves are propagated and tracked in order to estimate speed and Y oung's ***,for dispersive tssues,the displacement pulse is highly damped and distorted during propagation,diminishing the ffectiveness of peak tracking approaches,and leading to biased cstimates of wave ***,plane wave propagation is sometimes assumed,which contributes to estimation ***,we invert a wave propagation model that incorpo-rates propagation,decay,and distortion of pulses in a dispersive media in order to accurately estimate its elastic and viscous *** model uses a general first-order approximation of dispersion,avoiding the use of any particular rheological model of *** are conducted in elastic and viscoelastic tissue mimicking phantoms by producing a Gaussian push using acoustic radiation force excitation and measuring the wave propagation using a Fourier domain optical coherence tomography *** confirmed the ffectiveness of the inversion method in est imat ing viscoelastic parameters in both the viscoelastic and elastic phantoms when compared to mechanical ***,the viscoelastic characterization of a fresh porcine comea was *** results validate this approach when compared to other methods.

关键词： Elastography viscoelasticity cylindrical waves optical coherence tomography shear waves surface acoustic waves viscoelastic pha ntoms

Overview and detectability of the genetic modifications in ornamental plants

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Horticulture Research 2020年第1期7卷 2622-2633页

作者： Anne-Laure Boutigny Nicolas Dohin David Pornin Mathieu rolland Anses Plant Health LaboratoryBacteriology Virology GMO Unit7 rue Jean Dixméras49044 Angerscedex 01France

The market of ornamental plants is extremely competitive,and for many species genetic engineering can be used to introduce original traits of high commercial ***,very few genetically modified(GM)ornamental varieties have reached the market so ***,the authorization process required for such plants has a strong impact on the profitability of the development of such *** the numerous scientific studies using genetic modification on ornamental species of interest,a lot of transformed material has been produced,could be of commercial interest and could therefore be unintentionally released on the *** unintentional use of GM petunia in breeding programs has indeed recently been *** review lists scientific publications using GM ornamental plants and tries to identify whether these plants could be detected by molecular biology tools commonly used by control laboratories.

关键词： breeding ornamental lists

Auto-detection of Lesions on Endoscopic Images of the Esophagus

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Auto-detection of Lesions on Endoscopic Images of the Esopha...

作者： rolland Safort NTAGUE 上海交通大学

学位级别：硕士

Reflux diseases and esophageal lesions are common types of illness attacking the human *** is often done by computed tomography（CT）and magnetic resonance（MR）*** images can also be collected and processed separately using various image processing teachings,such a pattern recognition and *** later is a widely used method in computer vision and images *** allows us to partition a set of data,based on certain characteristics or features on the sample *** application in medical image analysis,especially for abnormal tissues or lesions detection,has evolved very rapidly in the past few *** accuracy and efficiency of the technique used to detect lesions is in direct correlation with the type and the amount of lesions that can be identified using such *** thesis proposes a new way of detecting esophageal lesions,with focus on granular cell tumors and Barrett’s esophagus *** image of the esophagus are collected and processed as 2 D image in the context of this *** leverage both the color and texture properties of each image to uncover eventual *** granular cell tumors,lesions appear in granular shapes or blobs of various size and *** these lesions mostly fall in a certain size range which can be exploited to single them ***,in our project,blobs finding methods are first applied to the image to find all the large blobs of maximum estimated size,then find small blobs with a minimum defined *** blobs are all discriminated by size,a final lesion confirmation algorithm is involved to determine which of the blobs among those matching the size boundary,are actually *** for Barrett’s esophagus detection,we use the k-means clustering method to segment the image based on given *** main types of features are extracted: The color and texture *** all lesions in the case of Barrett’s esophagus appear with a color and texture diffe

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A Single Active Trehalose-6-P Synthase （TPS） and a Family of Putative Regulatory TPS-Like Proteins in Arabidopsis

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Molecular Plant 2010年第2期3卷 406-419页

作者： Lies Vandesteene Matthew Ramon Katrien Le Roy Patrick Van Dijck Filip rolland Laboratory of Functional Biology Plant Metabolic Signaling Group Institute of Botany and Microbiology KU Leuven Kasteelpark Arenberg 31-bus 2438 B-3001 Heverlee Belgium Department of Molecular Biology Harvard Medical School Massachusetts General Hospital Boston USA Laboratory of Molecular Plant Physiology Institute of Botany and Microbiology KU Leuven Belgium Department of Molecular Microbiology VIB Leuven Belgium Laboratory of Molecular Cell Biology Institute of Botany and Microbiology KU Leuven Belgium

Higher plants typically do not produce trehalose in large amounts, but their genome sequences reveal large families of putative trehalose metabolism enzymes. An important regulatory role in plant growth and development is also emerging for the metabolic intermediate trehalose-6-P （T6P）. Here, we present an update on Arabidopsis trehalose me- tabolism and a resource for further detailed analyses. In addition, we provide evidence that Arabidop$is encodes a single trehalose-6-P synthase （TPS） next to a family of catalytically inactive TPS-like proteins that might fulfill specific regulatory functions in actively growing tissues.

关键词： Trehalose metabolism TPS Arabidopsis.