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Article ; Online: Generalized neutral axes in nondepolarizing optical systems.

Perrin, Guy

Journal of the Optical Society of America. A, Optics, image science, and vision

2024 Volume 41, Issue 4, Page(s) 708–713

Abstract: The polarizing properties of optical systems are often characterized by their action on specific polarization states. For example, half-wave plates are used to rotate linear polarizations and quarter-wave plates to turn a linear polarization into an ... ...

Abstract	The polarizing properties of optical systems are often characterized by their action on specific polarization states. For example, half-wave plates are used to rotate linear polarizations and quarter-wave plates to turn a linear polarization into an elliptical polarization and into a circular polarization if the linear polarization makes a 45° angle with the slow and fast axes of the quarter-wave plate. Phase shifts introduced by the optical train of an interferometer may lead to coherence losses and the existence of neutral axes-in the sense of linear polarizations whose polarization state is not modified by the optical system-is then of importance to maximize the fringe contrast. Neutral axes do not systematically exist. The purpose of this paper is to investigate how this notion can be generalized to define generalized neutral axes for optical systems. Generalized neutral axes are defined as linear polarizations whose polarization state is not modified by the optical system except for their orientation. It is shown that such generalized neutral axes exist for some classes of optical systems. The scheme proposed in this paper has quasi-unitary Jones matrices to give an approximate description of optical systems when generalized neutral axes do not exist. To the best of my knowledge, this formalism is a new scheme to describe the polarizing properties of nondepolarizing optical systems.
Language	English
Publishing date	2024-04-03
Publishing country	United States
Document type	Journal Article
ZDB-ID	283633-6
ISSN	1520-8532 ; 1084-7529 ; 0740-3232
ISSN (online)	1520-8532
ISSN	1084-7529 ; 0740-3232
DOI	10.1364/JOSAA.518345
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Book ; Online: Ouvrir plus, ouvrir mieux : Un défi pour les bibliothèques

Perrin, Georges

2014

Abstract: Ouvrir, oui mais quand? Matin, midi et soir? Le dimanche? Comment élargir les horaires douverture, quels sont les obstacles à franchir? Comment construire un tel projet, le porter et le mettre en œuvre? La France dispose aujourd'hui d'un des réseaux de ... ...

Abstract	Ouvrir, oui mais quand? Matin, midi et soir? Le dimanche? Comment élargir les horaires douverture, quels sont les obstacles à franchir? Comment construire un tel projet, le porter et le mettre en œuvre? La France dispose aujourd'hui d'un des réseaux de bibliothèques les plus développés d'Europe. Toutefois, depuis quelques années, la stagnation du nombre de lecteurs inscrits oblige à une réflexion sur son évolution. Parmi les causes de cette progressive désaffection figure la question des horaires d'ouverture qui, paradoxalement, n'a pas accompagné cette modernisation qui suppose un accueil élargi à tous les publics. La résolution de ce paradoxe appelle une réflexion sur le rôle social de la bibliothèque, aussi important que son rôle éducatif et culturel. Prendre en compte les nouveaux modes de vie du public, resituer la vraie place de la bibliothèque dans la ville ou sur le campus, harmoniser l'utilisation de l'espace par les usagers avec leur disponibilité dans le temps, répondre concrètement aux nouvelles attentes des différents publics, renouveler les pratiques professionnelles en direction du public, tels sont les thèmes évoqués dans cet ouvrage
Keywords	Language and Literature
Size	1 electronic resource ( pages)
Publisher	Presses de l'enssib
Document type	Book ; Online
Note	French ; Open Access
HBZ-ID	HT020322088
ISBN	9782375460634 ; 2375460634
DOI	10.4000/books.pressesenssib.3128
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Book ; Online: Favoriser l'insertion professionnelle et l'accès à l'emploi : Les atouts des bibliothèques

Perrin, Georges

2013

Abstract: Cherchant à adapter leurs services à l'actualité sociale et aux besoins réels de leur public, de plus en plus de bibliothèques se préoccupent d'offrir des services orientés vers l'insertion professionnelle et la recherche d'emploi. Qu'elle soit ... ...

Abstract	Cherchant à adapter leurs services à l'actualité sociale et aux besoins réels de leur public, de plus en plus de bibliothèques se préoccupent d'offrir des services orientés vers l'insertion professionnelle et la recherche d'emploi. Qu'elle soit universitaire ou publique, la bibliothèque constitue une ressource essentielle de la formation tout au long de la vie, élément primordial à l'adaptation permanente au monde du travail. Cet ouvrage aborde cette nouvelle problématique pour les établissements sous trois angles différents, selon les besoins des publics : travailler, se former, entreprendre. Les conditions d'accueil des publics concernés, l'adaptation de l'offre suivant la dimension de la bibliothèque, la constitution des collections spécialisées dans ce domaine, la qualité des propositions en matière d'autoformation, les atouts des différents partenariats dans le domaine de la recherche d'emploi, tels sont les éléments traités ici pour favoriser le succès de la mise en place et du développement d'une offre propre à élargir avec efficacité les champs d'intervention des bibliothèques aujourd'hui. Coordonné par Georges Perrin, inspecteur général honoraire des bibliothèques, ce volume collectif réunit des professionnels spécialisés dans le domaine éducatif, social et culturel
Keywords	Language and Literature
Size	1 electronic resource ( pages)
Publisher	Presses de l'enssib
Document type	Book ; Online
Note	French ; Open Access
HBZ-ID	HT020322080
ISBN	9782375460856 ; 2375460855
DOI	10.4000/books.pressesenssib.1879
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Predicting the suitability area of heath alliances over France using open-source data

Perrin, Gwenhael / Rozo, Clémence / Bioret, Frédéric / Hubert-Moy, Laurence / Rapinel, Sébastien

Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology. 2023 Mar. 4, v. 157, no. 2 p.379-391

2023

Abstract: While fine-scale maps of vegetation alliances are required for conservation, their distribution is usually known at broad scales. Open-access field and spatial data are increasingly available worldwide, but their contribution to modelling vegetation ... ...

Abstract	While fine-scale maps of vegetation alliances are required for conservation, their distribution is usually known at broad scales. Open-access field and spatial data are increasingly available worldwide, but their contribution to modelling vegetation alliances remains to be assessed. This study aimed to map the suitability area of six heath alliances distributed along ecological gradients throughout France. We used 20 broad and local variables derived from WorldClim, the European Union DEM, SoilGrids, and the Global Wind and Solar Atlases that describe bioclimatic and environmental conditions. For each alliance, two nested MaxEnt models were calibrated and validated using archive field data: one at a broad scale (1000 × 1000 m) to define its bioclimatic area, and the second at a local scale (25 × 25 m) to predict its environmental area. The results showed complementarity of the variables used to discriminate the alliances, and the accuracy of spatial modelling at broad (AUC = 0.83–0.99) and local scales (AUC = 0.91–0.99). They also highlighted the gradients of continentality and temperature that differentiate the alliances. These new maps provide additional knowledge about alliance distribution areas and could support natural vegetation conservation at a national scale.
Keywords	European Union ; plant biology ; spatial data ; temperature ; vegetation ; France ; MaxEnt ; Calluno vulgaris-Ulicetea minoris ; Genisto pilosae-Callunetea vulgaris ; archive vegetation data ; spaceborne-derived data ; conservation status
Language	English
Dates of publication	2023-0304
Size	p. 379-391.
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	2146652-X
ISSN	1724-5575 ; 1126-3504
ISSN (online)	1724-5575
ISSN	1126-3504
DOI	10.1080/11263504.2023.2165562
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Evaluation de l'impact de mesures d'accompagnement sur le changement de pratique des éleveurs bovins laitiers du district de Cu Chi, Vietman

Perrin, Guillaume

2016

Author's details	Guillaume Perrin
Language	French
Size	Online-Ressource
Document type	Book ; Online
Database	Special collection on veterinary medicine and general parasitology

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Book ; Online: Développer et exploiter un fonds spécialisé

Perrin, Georges

(La Boîte à outils)

1999

Series title	La Boîte à outils
Keywords	Library & information sciences ; Library, archive & information management ; collection ; traitement de l'information ; histoire du livre et des bibliothèques
Language	0\|f
Size	1 electronic resource (160 pages)
Publisher	Presses de l'enssib
Publishing place	Villeurbanne
Document type	Book ; Online
Note	French ; Open Access
HBZ-ID	HT021617551
ISBN	9782910227258 ; 2910227251
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article ; Online: Effects of a multifaceted intervention to promote the use of intravenous iron sucrose complex instead of ferric carboxymaltose in patients admitted for more than 24 h.

Touchard, Justine / Perrin, G / Berdot, S / Pouchot, J / Loustalot, M C / Sabatier, B

European journal of clinical pharmacology

2020 Volume 77, Issue 2, Page(s) 189–195

Abstract: Purpose: Although more practical for use, the impact of ferric carboxymaltose (FCM) on the hospital budget is considerable, and intravenous iron sucrose complex (ISC) represents a cost-saving alternative for the management of iron deficiency anemia in ... ...

Abstract	Purpose: Although more practical for use, the impact of ferric carboxymaltose (FCM) on the hospital budget is considerable, and intravenous iron sucrose complex (ISC) represents a cost-saving alternative for the management of iron deficiency anemia in patients during hospitalization. The Drug Committee decided to reserve FCM for day hospitalizations and contraindications to ISC, especially allergy. ISC was available for prescription for all other situations. Methods: The impact of a multifaceted intervention promoting a switch from FCM to ISC was evaluated using an interrupted time series model with segmented regression analysis. The standardized rate of the dispensing of FCM, ISC, and oral iron by the hospital pharmacy, as well as the rate of the dispensing of packed red blood cells and the number of biological iron status measurements, was analyzed before and after the intervention. Results: There was an immediate decrease in FCM consumption following the intervention, with a reduction of 88% (RR: 0.12 [CI Conclusion: Our intervention to lower the impact of intravenous iron therapy on the hospital budget was effective.
MeSH term(s)	Administration, Oral ; Anemia, Iron-Deficiency/blood ; Anemia, Iron-Deficiency/diagnosis ; Anemia, Iron-Deficiency/drug therapy ; Anemia, Iron-Deficiency/economics ; Cost Savings/statistics & numerical data ; Cost-Benefit Analysis/organization & administration ; Cost-Benefit Analysis/statistics & numerical data ; Decision Support Systems, Clinical/economics ; Decision Support Systems, Clinical/organization & administration ; Drug Prescriptions/economics ; Drug Prescriptions/statistics & numerical data ; Ferric Compounds/administration & dosage ; Ferric Compounds/economics ; Ferric Oxide, Saccharated/administration & dosage ; Ferric Oxide, Saccharated/economics ; France ; Health Plan Implementation ; Hematinics/administration & dosage ; Hematinics/economics ; Hospital Costs/statistics & numerical data ; Hospitalization/economics ; Humans ; Infusions, Intravenous/economics ; Interrupted Time Series Analysis ; Iron/blood ; Maltose/administration & dosage ; Maltose/analogs & derivatives ; Maltose/economics ; Pharmacy Service, Hospital/economics ; Pharmacy Service, Hospital/organization & administration ; Pharmacy Service, Hospital/statistics & numerical data ; Program Evaluation ; Treatment Outcome
Chemical Substances	Ferric Compounds ; Hematinics ; ferric carboxymaltose (6897GXD6OE) ; Maltose (69-79-4) ; Iron (E1UOL152H7) ; Ferric Oxide, Saccharated (FZ7NYF5N8L)
Language	English
Publishing date	2020-09-14
Publishing country	Germany
Document type	Journal Article
ZDB-ID	121960-1
ISSN	1432-1041 ; 0031-6970
ISSN (online)	1432-1041
ISSN	0031-6970
DOI	10.1007/s00228-020-02993-y
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Article ; Online: Bootstrapping time correlation functions of molecular dynamics.

Desbiens, Nicolas / Arnault, Philippe / Weens, William / Dubois, Vincent / Perrin, Guillaume

Physical review. E

2021 Volume 104, Issue 5-2, Page(s) 55310

Abstract: Molecular dynamics is often considered as a numerical experiment. The error bars on the results are therefore mandatory, but sometimes difficult to determine and computationally demanding. As a low-cost approach, we describe the application of the ... ...

Abstract	Molecular dynamics is often considered as a numerical experiment. The error bars on the results are therefore mandatory, but sometimes difficult to determine and computationally demanding. As a low-cost approach, we describe the application of the bootstrap (BS) method to the quantification of uncertainties pertaining to the time correlation functions. We chose the autocorrelation functions of velocity and interdiffusion current for a binary ionic mixture as a test bed, and we assessed the merit of the Darken approximation relating both of them. The intrinsic errors related to phase space sampling is investigated comparing the BS method with the reference method of replica. We also study how the BS method can assist in addressing the finite-size effects.
Language	English
Publishing date	2021-12-27
Publishing country	United States
Document type	Journal Article
ZDB-ID	2844562-4
ISSN	2470-0053 ; 2470-0045
ISSN (online)	2470-0053
ISSN	2470-0045
DOI	10.1103/PhysRevE.104.055310
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Article ; Online: Association Between Exposure to Effervescent Paracetamol and Hospitalization for Acute Heart Failure: A Case-Crossover Study.

Perrin, Germain / Arnoux, Armelle / Berdot, Sarah / Katsahian, Sandrine / Danchin, Nicolas / Sabatier, Brigitte

Journal of clinical pharmacology

2022 Volume 62, Issue 7, Page(s) 883–890

Abstract: We investigated whether effervescent paracetamol, as an important source of nondietary sodium and fluid load, is associated with a transient increase in the risk of hospitalization for acute heart failure (AHF). We conducted a unidirectional case- ... ...

Abstract	We investigated whether effervescent paracetamol, as an important source of nondietary sodium and fluid load, is associated with a transient increase in the risk of hospitalization for acute heart failure (AHF). We conducted a unidirectional case-crossover study using data from the 1 in 97th representative sample from the French health care database. Subjects aged ≥18 years, hospitalized for AHF during the 2014-2016 period, were included. Exposure to effervescent paracetamol was compared between a risk period (ie, 15 days immediately before admission for AHF) and 3 earlier 15-day control periods, to test a possible trigger effect of effervescent paracetamol intake on AHF. Adjusted odds ratios (aORs) were estimated with a conditional logistic regression. We identified 4301 patients hospitalized for AHF. We found that 5.7% of AHF subjects were exposed to effervescent paracetamol during the risk period, as compared with 4.1% during the control periods (aOR, 1.56 [95% confidence interval [CI], 1.27-1.90]; P < .001). This association was also found in the subgroup of subjects with hypertension (aOR, 1.45 [95%CI, 1.13-1.87]; P = .004, n = 2648) and in the subgroup of subjects aged ≥83 years (aOR, 1.70 [95%CI: 1.28-2.24], P < .001, n = 2238). A similar analysis, considering exposure to noneffervescent paracetamol, did not support the existence of an indication bias likely to explain the association observed for effervescent paracetamol. This study suggests an association between effervescent paracetamol and admission for AHF and should be confirmed with other complementary study designs.
MeSH term(s)	Acetaminophen/adverse effects ; Acute Disease ; Adolescent ; Adult ; Aged, 80 and over ; Cross-Over Studies ; Heart Failure/epidemiology ; Hospitalization ; Humans ; Hypertension
Chemical Substances	Acetaminophen (362O9ITL9D)
Language	English
Publishing date	2022-02-19
Publishing country	England
Document type	Journal Article
ZDB-ID	188980-1
ISSN	1552-4604 ; 0091-2700 ; 0021-9754
ISSN (online)	1552-4604
ISSN	0091-2700 ; 0021-9754
DOI	10.1002/jcph.2027
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Article ; Online: Identifying homogeneous healthcare use profiles and treatment sequences by combining sequence pattern mining with care trajectory clustering in kidney cancer patients on oral anticancer drugs: A case study.

Baudrier, Cyril / Tran, Yohann / Delanoy, Nicolas / Katsahian, Sandrine / Sabatier, Brigitte / Perrin, Germain

Health informatics journal

2022 Volume 28, Issue 2, Page(s) 14604582221101526

Abstract: Objective: We evaluated the ability of a coupled pattern-mining and clustering method to identify homogeneous groups of subjects in terms of healthcare resource use, prognosis and treatment sequences, in renal cancer patients beginning oral anticancer ... ...

Abstract	Objective: We evaluated the ability of a coupled pattern-mining and clustering method to identify homogeneous groups of subjects in terms of healthcare resource use, prognosis and treatment sequences, in renal cancer patients beginning oral anticancer treatment. Methods: Data were retrieved from the permanent sample of the French medico-administrative database. We applied the CP-SPAM algorithm for pattern mining to healthcare use sequences, followed by hierarchical clustering on principal components (HCPC). Results and conclusion: We identified 127 individuals with renal cancer with a first reimbursement of an oral anticancer drug between 2010 and 2017. Clustering identified three groups of subjects, and discrimination between these groups was good. These clusters differed significantly in terms of mortality at six and 12 months, and medical follow-up profile (predominantly outpatient or inpatient care, biological monitoring, reimbursement of supportive care drugs). This case study highlights the potential utility of applying sequence-mining algorithms to a large range of healthcare reimbursement data, to identify groups of subjects homogeneous in terms of their care pathways and medical behaviors.
MeSH term(s)	Algorithms ; Antineoplastic Agents/therapeutic use ; Cluster Analysis ; Data Mining/methods ; Databases, Factual ; Delivery of Health Care ; Humans ; Kidney Neoplasms/drug therapy
Chemical Substances	Antineoplastic Agents
Language	English
Publishing date	2022-06-21
Publishing country	England
Document type	Journal Article
ZDB-ID	2213115-2
ISSN	1741-2811 ; 1460-4582
ISSN (online)	1741-2811
ISSN	1460-4582
DOI	10.1177/14604582221101526
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