프랑스의 근로시간 단축

Pierre-Yves Sansea 한국노동연구원 2015 국제노동브리프 Vol.13 No.9

Calcium Antagonists : Clinical Use in the Treatment of Angina

Theroux, Pierre,Taeymans, Yves,Waters, david D. Medical Publications Korea 1979 Medical Progress Vol.6 No.4

초분광 원격탐사 기반 위험·유해물질 톨루엔 탐지

박재진,박경애,Pierre-Yves Foucher,김태성,이문진 한국지구과학회 2021 한국지구과학회지 Vol.42 No.6

The increased transport of marine hazardous and noxious substances (HNS) has resulted in frequent HNS spill accidents domestically and internationally. There are about 6,000 species of HNS internationally, and most of them have toxic properties. When an accidental HNS spill occurs, it can destroys the marine ecosystem and can damage life and property due to explosion and fire. Constructing a spectral library of HNS according to wavelength and developing a detection algorithm would help prepare for accidents. In this study, a ground HNS spill experiment was conducted in France. The toluene spectrum was determined through hyperspectral sensor measurements. HNS present in the hyperspectral images were detected by applying the spectral mixture algorithm. Preprocessing principal component analysis (PCA) removed noise and performed dimensional compression. The endmember spectra of toluene and seawater were extracted through the N-FINDR technique. By calculating the abundance fraction of toluene and seawater based on the spectrum, the detection accuracy of HNS in all pixels was presented as a probability. The probability was compared with radiance images at a wavelength of 418.15 nm to select abundance fractions with maximum detection accuracy. The accuracy exceeded 99% at a ratio of approximately 42%. Response to marine spills of HNS are presently impeded by the restricted access to the site because of high risk of exposure to toxic compounds. The present experimental and detection results could help estimate the area of contamination with HNS based on hyperspectral remote sensing. 국내외 해상 위험·유해물질(HNS, Hazardous and Noxious Substances) 물동량 증가와 함께 HNS 유출 사고가 빈번히 발생하고 있다. HNS는 전 세계적으로 약 6,000여 종으로 대부분 유독한 성질을 가지므로 이러한 유출 사고 발생은 해양 생태계 파괴를 비롯하여 폭발 및 화재 등으로 인한 인명 및 재산피해를 유발한다. 따라서 해상 HNS 유출 사고를 대비하여 파장에 따른 HNS 분광 라이브러리 구축 및 탐지 알고리즘을 개발해야 한다. 본 연구에서는 프랑스 현지에서 지상 HNS 유출 실험을 진행하였다. 초분광센서 관측을 통해 파장에 따른 톨루엔 라이브러리 스펙트럼을 구축하였으며, 분광혼합 알고리즘을 활용하여 초분광 HNS를 탐지하였다. 전처리 과정으로 주성분 분석을 적용하여 노이즈 제거 및차원 압축을 수행하였으며, N-FINDR 기법을 통해 영상을 대표하는 톨루엔과 해수의 엔드멤버 스펙트럼을 추출하였다. 스펙트럼 기반의 톨루엔 및 해수의 점유비율을 계산함으로써 모든 픽셀의 HNS 탐지 정확도를 확률로 제시하였다. 최대탐지 정확도를 가지는 점유비율 선정을 위해 418.15 nm 파장의 복사도 영상과 비교하였으며, 그 결과 약 42%의 비율에서 99% 이상의 정확도를 나타내었다. 해상 HNS 유출은 높은 위험성으로 인해 사람이 쉽게 접근할 수 없는 한계를 지닌다. 본 HNS 실험과정 및 탐지 결과는 초분광 원격탐사에 기반한 HNS 오염 해역 추정에 도움이 될 것이다.

초분광 원격탐사 기반 항공관측 및 현장자료를 활용한 선박탐지

박재진,오상우,Pierre-Yves Foucher,장재철,이문진,박경애,김태성,강원수 한국지구과학회 2017 한국지구과학회지 Vol.38 No.7

Maritime accidents around the Korean Peninsula are increasing, and the ship detection research using remote sensing data is consequently becoming increasingly important. This study presented a new ship detection algorithm using hyperspectral images that provide the spectral information of several hundred channels in the ship detection field, which depends on high resolution optical imagery. We applied a spectral matching algorithm between the reflection spectrum of the ship deck obtained from two field observations and the ship and seawater spectrum of the hyperspectral sensor of an airborne visible/infrared imaging spectrometer. A total of five detection algorithms were used, namely spectral distance similarity (SDS), spectral correlation similarity (SCS), spectral similarity value (SSV), spectral angle mapper (SAM), and spectral information divergence (SID). SDS showed an error in the detection of seawater inside the ship, and SAM showed a clear classification result with a difference between ship and seawater of approximately 1.8 times. Additionally, the present study classified the vessels included in hyperspectral images by presenting the adaptive thresholds of each technique. As a result, SAM and SID showed superior ship detection abilities compared to those of other detection algorithms. 한반도 주변 해상사고가 증가함에 따라 원격탐사 자료를 활용한 선박탐지 연구의 중요성이 점점 더 강조되고있다. 이 연구는 고해상도 광학영상에 의존하는 기존 선박탐지 분야에 수백 개 채널의 분광정보를 포함하는 초분광영상을 활용하여 새로운 선박탐지 알고리즘 제시하였다. 두 차례의 현장관측을 통해 측정한 선박 선체의 반사 스펙트럼과 AVIRIS (Airborne Visible/Infrared Imaging Spectrometer) 초분광센서 영상의 선박 및 해수 반사 스펙트럼 간의 분광정합 기법을 적용하였다. 총 다섯 개의 탐지 알고리즘 spectral distance similarity (SDS), spectral correlation similarity (SCS), spectral similarity value (SSV), spectral angle mapper (SAM), spectral information divergence (SID)를 사용하였다. SDS는 선박 일부가 해수로 탐지되는 오차를 나타내었고, SAM은 선박과 해수 사이에 약 1.8배의 차이를 나타내어 명확한 분류 결과를 보여주었다. 이와 더불어 본 연구에서는 각 기법의 최적 임계값을 제시하여 초분광 영상에 포함되어 있는 선박을 분류하였으며 그 결과 SAM, SID가 다른 탐지 알고리즘에 비해 우수한 선박탐지 능력을 보여주었다.

Dominance versus collaboration models: French and Italian luxury fashion brands in Japan

Isozaki Yoko,Donzé Pierre-Yves 한국마케팅과학회 2022 Journal of Global Fashion Marketing Vol.13 No.4

This paper examines the entry strategies of luxury brands in Japan. It uses the global value chain framework and the literature on international business to discuss the entry strategies adopted by European brands on the Japanese market during the last seven decades. Two different business models, the dominance model and collaboration model, which are exemplified by French and Italian companies, respectively, are identified in our analysis. The findings of our analysis suggest Italian luxury fashion brands initially used the collaboration model to enter Japan; however, this approach caused conflict over time, which eventually resulted in the adoption of the dominance model and convergence with the French model. This paper demonstrates that when entering markets with a large psychic distance, Western luxury brands are more likely to face the paradox that the dominance model can only be achieved in a specific set of circumstances through a transitional collaboration with local partners. In our conclusions, we detail the managerial implications for practitioners in the luxury sector.

Effectiveness and patient satisfaction of dental emergencies in Pitié Salpêtrière Hospital, Paris, during the COVID 19 pandemic

Isabelle Rodriguez,Daniel Zaluski,Pierre Alain Jodelet,Géraldine Lescaille,Rafael Toledo,Yves Boucher 대한치과마취과학회 2022 Journal of Dental Anesthesia and Pain Medicine Vol.22 No.4

Background: A previous study reported the effectiveness and patient satisfaction in the dental emergency unit (DEU) of the Pitie Salpetrière Hospital in Paris before coronavirus disease 2019 (COVID-19). The same methodology was used during the COVID-19 pandemic to compare pain, anxiety, and patient satisfaction during the two periods. Methods: This prospective study was conducted in 2020 (NCT04354272) on adult patients. Data were collected on day zero (D0) on site and then by phone during the daytime on day one (D1), day three (D3), and day seven (D7). The primary objective was to assess the pain intensity at D1. Secondary objectives were to assess pain intensity at D3 and D7, anxiety intensity at D1, D3, and D7, and patient satisfaction. Patients were evaluated on a 0-10 numeric scale on D1, D3, and D7; mean scores were compared with non-parametric statistics (ANOVA, Dunn’s). Results: A total of 445 patients were given the opportunity to participate in the study, and 370 patients consented. Seventy-one were lost during follow-up. Ultimately, 299 patients completed all the questionnaires and were included in the analysis. In the final sample (60% men, 40% women, aged 39 ± 14 years), 94% had health insurance. The mean pain scores were: D0, 6.1 ± 0.14; D1, 3.29 ± 0.16; D3, 2.08 ± 0.16; and D7, 1.07 ± 0.35. This indicates a significant decrease of 46%, 67%, and 82% at D1, D3, and D7, respectively, when compared to D0 (P < 0.0001). The mean anxiety scores were D0, 4.7 ± 0.19; D1, 2.6 ± 0.16; D3, 1.9 ± 0.61; and D7, 1.4 ± 0.15. This decrease was significant between D0 and D7 (ANOVA, P < 0.001). Perception of general health improved between D1 and D7. The overall satisfaction was 9.3 ± 0.06. Conclusion: DEU enabled a significant reduction in pain and anxiety with high overall satisfaction during COVID-19, which was very similar to levels observed pre-COVID-19 pandemic.

Collision induced dissociation of doubly-charged ions: Coulomb explosion <i>vs.</i> neutral loss in [Ca(urea)]²⁺ gas phase unimolecular reactivity <i>via</i> chemical dynamics simulations

Spezia, Riccardo,Cimas, Alvaro,Gaigeot, Marie-Pierre,Salpin, Jean-Yves,Song, Kihyung,Hase, William L. The Royal Society of Chemistry 2012 Physical chemistry chemical physics Vol.14 No.33

<P>In this paper we report different theoretical approaches to study the gas-phase unimolecular dissociation of the doubly-charged cation [Ca(urea)]<SUP>2+</SUP>, in order to rationalize recent experimental findings. Quantum mechanical plus molecular mechanical (QM/MM) direct chemical dynamics simulations were used to investigate collision induced dissociation (CID) and rotational–vibrational energy transfer for Ar + [Ca(urea)]<SUP>2+</SUP> collisions. For the picosecond time-domain of the simulations, both neutral loss and Coulomb explosion reactions were found and the differences in their mechanisms elucidated. The loss of neutral urea subsequent to collision with Ar occurs <I>via</I> a shattering mechanism, while the formation of two singly-charged cations follows statistical (or almost statistical) dynamics. Vibrational–rotational energy transfer efficiencies obtained for trajectories that do not dissociate during the trajectory integration were used in conjunction with RRKM rate constants to approximate dissociation pathways assuming complete intramolecular vibrational energy redistribution (IVR) and statistical dynamics. This statistical limit predicts, as expected, that at long time the most stable species on the potential energy surface (PES) dominate. These results, coupled with experimental CID from which both neutral loss and Coulomb explosion products were obtained, show that the gas phase dissociation of this ion occurs by multiple mechanisms leading to different products and that reactivity on the complicated PES is dynamically complex.</P> <P>Graphic Abstract</P><P>Chemical dynamics and statistical analysis differentiate reaction pathway kinetics between neutral loss and Coulomb explosion in unimolecular [Ca(urea)]<SUP>2+</SUP> dissociation. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2cp41379e'> </P>

A Comparison of Extraction Procedures of Water-Extractable Organic Matter in Soils

Julien Guigue,Olivier Mathieu,Stephane Mounier,Yves Lucas,Remi Laffont,Pierre-Alain Maron,Philippe Amiotte Suchet,Jean Leveque 한국토양비료학회 2014 한국토양비료학회 학술발표회 초록집 Vol.2014 No.6

Identifying Creep and Destructuration Related Soil Parameters by Optimization Methods

Yin-Fu Jin,Zhen-Yu Yin,Yvon Riou,Pierre-Yves Hicher 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.4

The paper aims to construct an efficient optimization method for identifying creep and destructuration related governing parameters of soft structured clay. An elastic viscoplastic model has been developed and adopted. Different optimization processes, by genetic algorithm or particle swarm optimization with uniform or random samplings initialization methods, are carried out to obtain the material parameters from conventional undrained triaxial tests performed on a K0-concolidated natural soft clay. All comparisons demonstrate that the uniqueness of the solution is better guaranteed with the genetic algorithm rather than with the particle swarm optimization method. Furthermore, the efficiency of genetic algorithm has been verified by simulating other tests.

Optimizing Millisecond Time Scale Near-Infrared Emission in Polynuclear Chrome(III)-Lanthanide(III) Complexes

Aboshyan-Sorgho, Lilit,Nozary, Homayoun,Aebischer, Annina,Bü,nzli, Jean-Claude G.,Morgantini, Pierre-Yves,Kittilstved, Kevin R.,Hauser, Andreas,Eliseeva, Svetlana V.,Petoud, Sté,phane,Piguet American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.30