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Ultrashort pulsed laser induced complex surface structures generated by tailoring the melt hydrodynamics

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Opto-Electronic Advances 2022年第3期5卷 53-68,I0001页

作者： Fotis Fraggelakis George D.Tsibidis emmanuel Stratakis Institute of Electronic Structure and Laser(IESL) Foundation for Research and Technology(FORTH)N.Plastira 100Vassilika VoutonHeraklion 70013Greece Department of Physics University of CreteHeraklion 71003Greece

We present a novel approach for tailoring the laser induced surface topography upon femtosecond(fs)pulsed laser *** method employs spatially controlled double fs laser pulses to actively regulate the hydrodynamic microfluidic motion of the melted layer that gives rise to the structures *** pulse train used,in particular,consists of a previously unexplored spatiotemporal intensity combination including one pulse with Gaussian and another with periodically modulated intensity distribution created by Direct Laser Interference Patterning(DLIP).The interpulse delay is appropriately chosen to reveal the contribution of the microfluidic melt flow,while it is found that the sequence of the Gaussian and DLIP pulses remarkably influences the surface profile *** also demonstrate that both the spatial intensity of the double pulse and the effective number of pulses per irradiation spot can further be modulated to control the formation of complex surface *** underlying physical processes behind the complex patterns’generation were interpreted in terms of a multiscale model combining electron excitation with melt *** believe that this work can constitute a significant step forward towards producing laser induced surface structures on demand by tailoring the melt microfluidic phenomena.

关键词： laser-matter interaction direct laser interference patterning surface functionalization laser micro/nano fabrication

Post-VMS mineralization deformations （1880-1820 Ma） of the Skellefte district （Sweden）： insights from the spatial pattern of VMS occurrences

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Frontiers of Earth Science 2014年第3期8卷 319-324页

作者： emmanuel John M. CARRANZA Martiya SADEGHI School of Earth and Environmental Sciences James Cook University Townsville Queensland 4811 Australia Geological Survey of Sweden Villav/igen 18 Uppsala Sweden

In the last two to three decades or so, the spatial pattern of mineral occurrences of a deposit-type has been studied to derive insights to mineralization controls and assist mineral exploration. In the Skellefte district, Fry plots of volcanogenic massive sulfide （VMS） mines/ prospects reveal patterns that are likely due to post- mineralization deformation events. The fractal dimensions of the spatial patterns of the present-day VMS mines/ prospects and that of the ＇original＇ VMS deposits support the concept that spatial patterns of mineral deposits are spatially-invariant. Therefore, analysis of the spatial pattern of mineral deposits is useful not only in research about pre- and syn-mineralization geological settings but also post-mineralization geological settings.

关键词： fractal Fry analysis mineral deposits structural history orogenic belts

Metal-organic frameworks incorporated with C3N4:A visible light enhanced platform for degradation of polybromodiphenyl ethers

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Journal of Environmental Sciences 2023年第12期134卷 44-54页

作者： Akese emmanuel Meiying Yang Tingting Xu Qi Shen Chunyan Sun School of Chemistry and Chemical Engineering Shaoxing UniversityShaoxing 312000China School of Chemistry and Chemical Engineering Institute of New EnergyShaoxing UniversityShaoxing 312000China

A series of nano-photocatalysts metal-organic frameworks(MOFs)/graphitic carbon nitride(CN)(named MOFCN-x) with high activity have been synthesized by in-situ growth *** visible light irradiation, MOFCN-x hybrids show enhanced photocatalytic activity for the debromination of polybromodiphenyl ethers(PBDEs) compared with CN. Among all the hybrids, MOFCN-2 shows the highest reaction rate, which is 3.3 times as high as that in CN. MOFCN-x photocatalysts own stable visible light activity after recycled experiment. It indicates that a moderate amount of MOFs in MOFCN-x can largely enhance the photocatalytic ability by improved visible light absorption, larger specific surface area and better photo-generated charge carriers separation and transfer capabilities. More interestingly,the debromination pathway of PBDEs by MOFCN-x shows obvious selectivity compared with pure CN that bromines at meta-positions are much more susceptible than those at the paraand ortho-positions. The possible photoreductive mechanism has been proposed. This study shows that nanocomposite MOFCN can be an excellent candidate for dealing with halogen pollutants by solar-driven.

关键词： Graphitic carbon nitride Metal-organic frameworks Photocatalytic reduction Polybromodiphenyl ethers Visible light

Thermal performance of lightweight concrete applications in building envelopes in Lebanon

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Building Simulation 2021年第5期14卷 1359-1375页

作者： Emilio Sassine Elias Kinab Yassine Cherif emmanuel Antczak Michel Nasrallah Lebanese University Habitat and Energy UnitGroup of Thermal and Renewable Energies-Laboratory of Applied Physics(LPA-GMTER)Faculty of SciencesFanar CampusLebanon Lebanese University Faculty of EngineeringRoumiehEl MetnLebanon Univ.Artois ULR4515Laboratoire de Genie Civil et geo-Environnement(LGCgE)BethuneF-62400France CC Technique Memari StreetHamraBeirutLebanon

Innovative building materials are being used in building envelopes for reducing their heating and cooling *** paper aims to assess the thermal impact of using lightweight concrete in Lebanese building constructions by pouring an 8 cm thickness of lightweight concrete on the roof and the slab and replacing traditional hollow concrete block by lightweight concrete *** properties of two different samples were experimentally determined:the first one(558 kg/m^(3))used for the roof and the slab and the second one(1074 kg/m^(3))used for the *** numerical simulations were carried out for a Lebanese traditional detached house using the characteristics of these two *** thermally improved Light Weight Concrete building(LWC)was compared to a traditional Lebanese house base case(BC)using a dynamic building energy simulation tool in the four different Lebanese climate zones:coastal,mid-mountain,mountain,and inland *** results highlight the effectiveness of integrating LWC to building envelopes by reducing energy consumption and improving thermal comfort in both winter and summer climate conditions and in the different Lebanese climatic *** paper demonstrates that the use of LWC in the vertical walls replacing the traditional hollow blocks can reduce the heating needs by up to 9%and by up to 13%for cooling *** the other hand,adding a LWC roof screed has a very high impact on cooling and heating energy consumption,which can reach up to 74%in cooling energy savings and up to 24%in heating energy savings.

关键词： lightweight concrete thermal properties building energy simulation thermal insulation climatic conditions

Frozen Gaussian Approximation for the Dirac Equation in Curved Space with Application to Strained Graphene

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Communications in Computational Physics 2023年第6期33卷 18-37页

作者： Lihui Chai Lorin emmanuel Xu Yang School of Mathematics Sun Yat-sen UniversityGuangzhouChina School of Mathematics and Statistics Carleton UniversityOttawaCanada.Centre de Recherches MathematiquesUniversite de MontrealMontrealCanada Department of Mathematics University of CaliforniaSanta BarbaraUSA

In this paper,we derive the frozen Gaussian approximation(FGA)for computing the solution to the Dirac equation in curved space in the semi-classical *** latter equation is used in particular for modeling electronic scattering on strained graphene *** present numerical comparisons of the Dirac solutions on curved and flat spaces,illustrating the focusing effect of graphene surfaces,as well as qualitative comparisons with a tight-binding model.A CPU-time comparison shows that FGA becomes more efficient than an IMEX pseudospectral method when the semiclassical parameter is small.

关键词： Dirac equation semi-classical regime frozen Gaussian approximation strained graphene

Role of RIPK1 in the pathogenesis of acute respiratory distresssyndrome

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BIOCELL 2023年第10期47卷 2151-2162页

作者： XUNAN ZHAO emmanuel MAGO DAN WENG School of Environmental and Biological Engineering Nanjing University of Science&TechnologyNanjingChina

Acute respiratory distress syndrome (ARDS) is a life-threatening pulmonary disease typically caused bymicrobial infections, trauma, inhalation of harmful gases, and other factors. It is characterized by an inflammation inthe lungs and increased alveolar permeability, leading to pulmonary edema and consequently, a low oxygen supply orhypoxemia. ARDS is responsible for 1 in 10 admissions to intensive care units, and the mortality rate for patientswith severe ARDS is as high as 46%. Extensive efforts have been devoted to investigating the pathological mechanismsof ARDS to develop new effective clinical strategies. Recent studies have reported that receptor-interacting serine/threonine kinase 1 (RIPK1) is involved in the pathogenesis of ARDS. RIPK1 is a critical mediator of programmed celldeath and inflammation. Growing evidence suggests that RIPK1 plays a role in the pathogenesis of differentinflammatory diseases and serves as a promising pharmaceutical target. This review summarizes and sheds some lighton the recent findings regarding the role of RIPK1 and related molecules in the pathogenesis of ARDS.

关键词： ARDS ALI RIPK1 Necroptosis Inflammation

Biliary cystadenoma with mesenchymal stroma:Report of a case and review of the literature

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World Journal of Gastroenterology 2006年第37期12卷 6062-6069页

作者： Andreas Manouras Haridimos Markogiannakis emmanuel Lagoudianakis Vangelogiannis Katergiannakis 1st Depart- ment of Propaedeutic Surgery Hippokration Hospital Athens Medical School University of Athens Vasilissis Sofi as 114 Av- enue 11527 Athens Greece

Biliary cystadenomas are rare, cystic neoplasms of the biliary ductal system that usually occur in middle- aged women. They cannot be safely differentiated from cystadenocarcinomas before operation and should always be considered for resection. Cystadenomas have a strong tendency to recur, particularly following incomplete excision, and a potential of malignant transformation. Therefore, complete resection is the therapy of choice and thorough histopathologic evaluation is imperative. A case of benign biliary cystadenoma with mesenchymal stroma is presented along with a review of the relative literature addressing the clinical presentation, histology, histogenesis, differential diagnosis, imaging features, treatment and prognosis of this interesting and rare entity.

关键词： Biliary cystadenoma Biliary cystadenocarcinoma Mesenchymal stroma

Theories of Social Media： Philosophical Foundations

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Engineering 2018年第1期4卷 94-102页

作者： Jiayin Qi emmanuel Monod Binxing Fang Shichang Deng School of Management Shanghai University of International Business and Economics Shanghai 201620 China Institute of Artificial Intelligence and Change Management Shanghai University of International Business and Economics Shanghai 200336 China Institute of Cyberspace Advanced Technology Guangzhou University Guangzhou 510006 China China Electronics Corporation Beijing 100082 China Key Laboratory of Trustworthy Distributed Computing and Service of Ministry of Education Belting University of Posts and Telecommunications Beijing 100876 China

Although many different views of social media coexist in the field of information systems （IS）, such the- ories are usually not introduced in a consistent framework based on philosophical foundations, This paper introduces the dimensions of lifeworld and consideration of others, The concept of lifeworld includes Descartes＇ rationality and Heidegger＇s historicity, and consideration of others is based on instru- mentalism and Heidegger＇s ＂being-with,＂ These philosophical foundations elaborate a framework where different archetypal theories applied to social media may he compared： Goffman＇s presentation of sell Bourdieu＇s social capital, Sartre＇s existential project, and Heidegger＇s ＂shared-world,＂ While Goffman has become a frequent reference in social media, the three other references are innovative in IS research, The concepts of these four theories of social media are compared with empirical findings in IS literature, While some of these concepts match the empirical findings, some other concepts have not yet been inves- tigated in the use of social media, suggesting future research directions,

关键词： Social media Lifeworld Consideration of others Rationality Historicity lnstrumentalism Being-with Presentation of self

Structure of Channel Flows with Surface Mounted Ribs

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Journal of Thermal Science 2004年第3期13卷 213-219页

作者： Gérard J. POITRAS Laurent-emmanuel BRIZZI Yves GAGNON Université de Moncton Moncton (NB) CanadaLaboratoire d'études aérodynamiques Université de Poitiers 86960 Futuroscope FranceUniversité de Moncton Edmundston (NB) Canada

The flow inside a channel with surface mounted ribs is studied by numerical simulation and experimental flow visualization. Both the geometry with one rib and the geometry with two ribs, placed perpendicular to the flow, are studied, with particular emphasis on the effect of the variation of the distance between the ribs on the structure of the flow. Results show that, for Reynolds number flows of 400 and 1000 (based on the uniform incoming velocity and the height of the ribs), the flow reattaches between the ribs when they are separated by distances of 12h (h being the height of the ribs) and 6h, respectively. In this respect, however, the numerical results for the Reynolds number flow of 1000 are in contradiction with published results.

关键词： vortex methods flow visualization channel flows ribs.