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High-rate intercity quantum key distribution with a semiconductor single-photon source

Light(Science & Applications) 2024年第10期13卷 2114-2123页

作者： Jingzhong Yang Zenghui Jiang Frederik Benthin Joscha Hanel Tom Fandrich Raphael Joos Stephanie Bauer Sascha Kolatschek Ali Hreibie Eddy Patrick Rugeramigabo Michael Jetter simone luca portalupi Michael Zopf Peter Michler tefan Kuck Fei Ding institut fur Festkorperphysik Leibniz Universitat HannoverAppelstraBe 230167 HannoverGermany institut fur Halbleiteroptik und Funktionelle Grenzflachen Center for Integrated Quantum Science and Technology(IQST)and SCoPEUniversity of StuttgartStuttgartGermany Physikalisch-Technische Bundesanstalt BraunschweigGermany Laboratorium fur Nanound Quantenengineering Leibniz Universitat HannoverSchneiderberg 3930167HannoverGermany

Quantum key distribution(QKD)enables the transmission of information that is secure against general attacks by *** use of on-demand quantum light sources in QKD protocols is expected to help improve security and maximum tolerable *** quantum dots(QDs)are a promising building block for quantum communication applications because of the deterministic emission of single photons with high brightness and low multiphoton *** we report on the first intercity QKD experiment using a bright deterministic single photon source.A BB84 protocol based on polarisation encoding is realised using the high-rate single photons in the telecommunication C-band emitted from a semiconductor QD embedded in a circular Bragg grating *** the 79 km long link with 25.49 dB loss(equivalent to 130 km for the direct-connected optical fibre)between the German cities of Hannover and Braunschweig,a record-high secret key bits per pulse of 4.8 ×10^(-5) with an average quantum bit error ratio of~0.65%are *** asymptotic maximum tolerable loss of 28.11 dB is found,corresponding to a length of 144 km of standard telecommunication *** semiconductor sources therefore challenge state-of-the-art QKD protocols and have the potential to excel in measurement device independent protocols and quantum repeater applications.

关键词： structure. quantum distribution

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3D printed micro-optics for quantum technology:Optimised coupling of single quantum dot emission into a single-mode fibre

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Light(Advanced Manufacturing) 2021年第2期2卷 1-17页

作者： Marc Sartison Ksenia Weber Simon Thiele lucas Bremer Sarah Fischbach Thomas Herzog Sascha Kolatschek Michael Jetter Stephan Reitzenstein Alois Herkommer Peter Michler simone luca portalupi Harald Giessen Institut für Halbleiteroptik und Funktionelle Grenzflächen Research Center SCoPEand Integrated Quantum Science and Technology Center IQSTUniversity of Stuttgart70569 StuttgartGermany 4^(th)Physics Institute Research Center SCoPEand Integrated Quantum Science and Technology Center IQSTUniversity of Stuttgart70569 StuttgartGermany Institute of Applied Optics(ITO)and Research Center SCoPE University of Stuttgart70569 StuttgartGermany Institute of Solid State Physics Technical University of Berlin10623 BerlinGermany

Future quantum technology relies crucially on building quantum networks with high *** achieve this challenging goal,it is of utmost importance to connect individual quantum systems such that their emitted single photons overlap with the highest possible degree of *** requires perfect mode overlap of the emitted light from different emitters,which necessitates the use of single-mode ***,we present an advanced manufacturing approach to accomplish this *** combined 3D printed complex micro-optics,such as hemispherical and Weierstrass solid immersion lenses,as well as total internal reflection solid immersion lenses,on top of individual indium arsenide quantum dots with 3D printed optics on single-mode fibres and compared their key *** observed a systematic increase in the collection efficiency under variations of the lens geometry from roughly 2 for hemispheric solid immersion lenses up to a maximum of greater than 9 for the total internal reflection ***,the temperature-induced stress was estimated for these particular lens dimensions and results to be approximately 5 ***,the use of solid immersion lenses further increased the localisation accuracy of the emitters to less than 1 nm when acquiring micro-photoluminescence ***,we show that the single-photon character of the source is preserved after device fabrication,reaching a g^((2))(0)value of approximately 0.19 under pulsed optical *** printed lens device can be further joined with an optical fibre and permanently *** integrated system can be cooled by dipping into liquid helium using a Stirling cryocooler or by a closed-cycle helium cryostat without the necessity for optical windows,as all access is through the integrated single-mode *** identify the ideal optical designs and present experiments that demonstrate excellent high-rate single-photon emission.

关键词： mode fibre optics

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High-speed tracked vehicle model order reduction for static and dynamic simulations

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Defence Technology（防务技术） 2024年第8期38卷 89-110页

作者： luca Dimauro simone Venturini Antonio Tota Enrico Galvagno Mauro Velardocchia Department of Mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli Abruzzi2410129TorinoItaly

In this paper, a model order reduction strategy is adopted for the static and dynamic behaviour simulation of a high-speed tracked vehicle. The total number of degree of freedom of the structure is condensed through a selection of interface degrees of freedom and significant global mode shapes, for an approximated description of vehicle dynamic behaviour. The methodology is implemented in a customised open-source software to reduce the computational efforts. The modelled tracked vehicle includes the sprung mass, the unsprung masses, connected by means of torsional bars, and all the track assemblies, composing the track chain. The proposed research activity presents a comprehensive investigation of the influence of the track chain, combined with longitudinal vehicle speed, on statics and vehicle dynamics, focusing on vertical dynamics. The vehicle response has been investigated both in frequency and time domain. In this last case road-wheel displacements are assumed as inputs for the model, under different working conditions, hence considering several road profiles with different amplitudes and characteristic excitation frequencies. Simulation results have proven a high fidelity in model order reduction approach and a significant contribution of the track chain in the global dynamic behaviour of the tracked vehicle.

关键词： Tracked vehicle dynamics Rubber characteristics Component mode synthesis Modal analysis Open-source

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A novel approach for manufacturing of layered,ultra-refractory composites using pliable,short fibre-reinforced ceramic sheets

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Journal of Advanced Ceramics 2023年第1期12卷 155-168页

作者： Matteo MOR Antonio VINCI simone FAILLA Pietro GALIZIA luca ZOLI Diletta SCITI ISSMC-CNR Institute of ScienceTechnology and Sustainability for CeramicsVia Granarolo 6448018 Faenza(RA)Italy

A new additive technique for manufacturing of short fibre-reinforced ultra-refractory ceramics is *** technique allows the fabrication of solvent-free,thin(~100µm),flexible,and easy-to-handle sheets suitable for fabricating homogeneous or layered structures.A large range of compositions,in terms of matrix and fibre volumetric contents,from 0%to 100%is *** amount of short carbon fibres incorporated in the sheets ranged from 20 to 50 vol%,whereas the fibre length ranged from 3 to 5 *** matrix composition investigated with this technique consisted of ZrB_(2)/SiC/Y_(2)O_(3).By increasing the fibre amount from 35 to 50 vol%,an improvement of mechanical properties was ***-point flexural strength(σ)ranged from 107 to 140 MPa,depending on the amount of carbon fibres(Cf).The same holds true for the work of fracture,ranging from 108 to 253 J/m^(2).Functionally graded composites were fabricated by overlapping sheets with a fibre gradient(0%-50%).

关键词： ultra-high-temperature ceramics(UHTCs) ceramic matrix composites(CMCs) short carbon fibres mechanical properties

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ZrB_(2)-SiC ceramics toughened with oriented paper-derived graphite for a sustainable approach

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Journal of Advanced Ceramics 2024年第2期13卷 207-219页

作者： luca Zoli Francesca Servadei simone Failla Matteo Mor Antonio Vinci Pietro Galizia Diletta Sciti CNR-ISSMC Institute of ScienceTechnology and Sustainability for CeramicsFaenza I-48018Italy

Carbon fibre-reinforced ultra-high temperature ceramics(UHTCs)are considered a class of promising materials for several applications,the most appealing ones being in the aerospace *** is necessary to overcome the brittleness and low thermal shock resistance of ceramics and is often provided through the addition of carbon fibres or other carbon-based phases,such as nanotubes,graphene,and *** present work is focused on the toughening of UHTCs through incorporation of 30-50 vol% thin,ordered graphite layers from conventional filter paper followed by hot pressing *** filter paper was selected because it undergoes thermolysis with no melting stage forming a strong carbonaceous residue that can be used as *** and mechanical properties of toughened composites were compared to those of other materials reinforced with short carbon fibres and the effect of different distribution of graphite was *** of graphite allowed toughness to be increased from 3−4 MPa·m^(1/2)(for unreinforced materials)to 5.1−5.5 MPa·m^(1/2),similar to results obtained with short fibre *** high-temperature properties,such as strength and toughness as well as oxidation resistance at 1500℃,were also examined.

关键词： borides paper-derived graphite microstructure toughness sustainability

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Ophthalmic manifestations of cat scratch disease

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Annals of Eye Science 2021年第2期6卷 51-61页

作者： Daniele Cirone Erika Mandarà luca De simone Francesco Pellegrini luca Cimino Ophthalmology Department Villa Anna HospitalSan Benedetto del TrontoAPItaly Ophthalmology Department AULSS2 Marca TrevigianaConeglianoTVItaly Ocular Immunology Unit Azienda USL-IRCCS Reggio EmiliaReggio EmiliaItaly Ophthalmology Department AUSL PescaraPescaraItaly

Cat scratch disease(CSD)is a worldwide distributed zoonosis caused by Bartonella henselae and other Bartonella *** reservoirs of Bartonella are domestic animals,especially cats,and the transmission to humans is thought to occur from a cat scratch or even through the cat flea Ctenocephalides *** more and more pet owners,the physicians should keep in mind signs and symptoms of CSD.A widespread infection may occur in 5-14%of cases,and ocular involvement,called ocular bartonellosis,is a quite common consequence of disseminated *** the most typical manifestations of ocular Bartonellosis are Parinaud’s oculoglandular syndrome,neuroretinitis and retinochoroiditis,many other ophthalmic conditions have been *** diagnosis of CSD is often based on history of contact with a cat and high serum titers of immunoglobulin G antibodies against *** chain reaction could be helpful for CSD diagnosis when serology is negative but clinical findings are suggestive for the *** imaging,including fundus autofluorescence,fluorescein and indocyanine green angiography,optical coherence tomography(OCT)and OCT angiography,can be used for diagnosis and monitoring of ocular *** CSD is more often a self-limited infection in immunocompetent individuals,no antibiotic treatment is usually ***,when a therapy is prescribed,doxycycline is the most used *** aim of this article is to review the current literature relating to epidemiology,systemic and ocular manifestations,diagnosis,treatment and prognosis of bartonellosis,in order to give the ophthalmologists a useful tool for daily practice.

关键词： Cat scratch disease(CSD) bartonella ocular bartonellosis neuroretinitis

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Effects of early postnatal gastric and colonic microbiota transplantation on piglet gut health

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Journal of Animal Science and Biotechnology 2024年第2期15卷 645-658页

作者： Christina Larsen simone Margaard Offersen Anders Brunse Mattia Pirolo Soumya Kanti Kar luca Guadabassi Thomas Thymann Department of Veterinary and Animal Science University of CopenhagenDyrlagevej 681870 Frederiksberg CDenmark Animal Nutrition Wageningen Livestock ResearchWageningen University&Research1 De Elst6708 WageningenThe Netherlands

Background Diarrhea is a major cause of reduced growth and mortality in piglets during the suckling and weaning periods and poses a major threat to the global pig *** and gut dysbiosis may in part be prevented via improved early postnatal microbial colonization of the *** secure better postnatal gut colonization,we hypothesized that transplantation of colonic or gastric content from healthy donors to newborn recipients would prevent diarrhea in the recipients in the post-weaning *** objective was to examine the impact of transplanting colonic or gastric content on health and growth parameters and paraclinical parameters in recipient single-housed piglets exposed to a weaning transition and challenged with enterotoxigenic Escherichia coli(ETEC).Methods Seventy-two 1-day-old piglets were randomized to four groups:colonic microbiota transplantation(CMT,n=18),colonic content filtrate transplantation(CcFT,n=18),gastric microbiota transplantation(GMT,n=18),or saline(CON,n=18).Inoculations were given on d 2 and 3 of life,and all piglets were milk-fed until weaning(d 20)and shortly after challenged with ETEC(d 24).We assessed growth,diarrhea prevalence,ETEC concentration,organ weight,blood parameters,small intestinal morphology and histology,gut mucosal function,and microbiota composition and *** Episodes of diarrhea were seen in all groups during both the milk-and the solid-feeding phase,possibly due to stress associated with single ***,CcFT showed lower diarrhea prevalence on d 27,28,and 29 compared to CON(all P<0.05).CcFT also showed a lower ETEC prevalence on d 27(P<0.05).CMT showed a higher alpha diversity and a difference in beta diversity compared to CON(P<0.05).Growth and other paraclinical endpoints were similar across *** In conclusion,only CcFT reduced ETEC-related post-weaning ***,the protective effect was marginal,suggesting that higher doses,more effective modalities of administration

关键词： Colonic content filtrate transplantation Colonic microbiota transplantation Gastric microbiota transplantation Gut microbiota Mucosa Neonatal Post-weaning diarrhea

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Vascular-confined multi-passage discoidal nanoconstructs for the low-dose docetaxel inhibition of triple-negative breast cancer growth

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Nano Research 2022年第1期15卷 482-491页

作者： Alessia Felici Daniele Di Mascolo Miguel Ferreira simone Lauciello luca Bono Andrea Armirotti Arunkumar Pitchaimani Anna Lisa Palange Paolo Decuzzi Laboratory of Nanotechnology for Precision Medicine Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy Department of Informatics BioengineeringRobotics and System EngineeringUniversity of GenoaGenoa 16126Italy Nanochemistry Laboratory Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy Analytical Chemistry Laboratory Fondazione Istituto Italiano di TecnologiaGenoa 16163Italy

Taxane efficacy in triple negative breast cancer(TNBC)is limited by insufficient tumor accumulation and severe off-target *** offer a unique opportunity to enhance the anti-cancer potency of this ***,1,000 nm×400 nm discoidal polymeric nanoconstructs(DPN)encapsulating docetaxel(DTXL)and the near infrared compound Iipid-Cy5 were *** were obtained by filling multiple times cylindrical wells in a poly(vinyl alcohol)template with a polymer mixture comprising poly(lactic-co-glycolic acid)(PLGA)and poly(ethylene glycol)diacrylate(PEG-DA)chains together with therapeutic and imaging *** resulting“multi-passage”DPN exhibited higher DTXL loading,Iipid-Cy5 stability,and stiffness as compared to the conventional"single-passage"*** microscopy confirmed that DTXL-DPN were not taken up by MDA-MB-231 cells but would rather sit next to the cell membrane and slowly release DTXL *** DPN had no toxicity on TNBC cells,whereas DTXL-DPN presented a cytotoxic potential comparable to free DTXL(IC_(50)=2.6 nM±1.0 nM vs.7.0 nM±1.09 nM at 72 h).In orthotopic murine models,DPN accumulated in TNBC more efficiently than *** only 2 mg/kg DTXL,intravenously administered every 2 days for a total of 13 treatments,DTXL-DPN induced tumor regression and were associated to an overall 80%survival rate as opposed to a 30%survival rate for free-DTXL,at 120 *** untreated mice succumbed before 90 ***,this data demonstrates that vascular confined multi-passage DPN,biomimicking the behavior of circulating platelets,can efficiently deliver chemotherapeutic molecules to malignant tissues and effectively treat orthotopic TNBC at minimal taxane doses.

关键词： hydrogel particles template strategy vascular targeting biomimicry cancer therapy

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Propulsion tests on ultra-high-temperature ceramic matrix composites for reusable rocket nozzles

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Journal of Advanced Ceramics 2023年第7期12卷 1345-1360页

作者： Diletta Sciti Antonio Vinci luca Zoli Pietro Galizia simone Failla Stefano Mungiguerra Giuseppe D.Di Martino Anselmo Cecere Raffaele Savino Institute of Science Technology and Sustainability for Ceramics-National Research CouncilFaenza 48018Italy Department of Industrial Engineering University of Naples Federico IINaples 80125Italy

Ultra-high-temperature ceramic matrix composites(UHTCMCs)based on a ZrB_(2)/SiC matrix have been investigated for the fabrication of reusable nozzles for *** de Laval nozzle prototypes,obtained by sintering with either hot pressing(HP)or spark plasma sintering(SPS),were tested 2-3 times in a hybrid rocket motor for proving *** were extracted after oxidation tests to study the microstructural changes and oxidative and thermomechanical stresses induced by the repeated *** to a reference graphite nozzle,no measurable erosion was observed for the UHTCMC-based *** oxidation mechanism consisted in the formation of a ZrO_(2)intermediate layer,with a liquid silicon oxide(SiO_(2))layer on the surface that was displaced by the action of the gas flux towards the divergent part of the nozzle,protecting it from further *** specimens obtained by HP and SPS displayed similar performance,with very slight differences,which were attributed to small changes in *** tests demonstrated the capability of complex-shaped prototypes made of the developed UHTCMCs to survive repeated exposure to environments representative of a realistic space propulsion application,for overall operating time up to 30 s,without any failure nor measurable erosion,making a promising step towards the development of reusable rocket components.

关键词： ultra-high-temperature ceramics(UHTCs) ceramic matrix composites(CMCs) propulsion oxidation resistance nozzle prototypes

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Lymphoepithelioma-like hepatocellular carcinoma: Case report and review of the literature

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World Journal of Gastroenterology 2015年第36期21卷 10468-10474页

作者： Andrea Cacciato Insilla Pinuccia Faviana luca Emanuele Pollina Paolo De simone Laura Coletti Franco Filipponi Daniela Campani Department of Surgical MedicalMolecular Pathology and Critical AreaDivision of Surgical PathologyUniversity Hospital of Pisa Department of Surgical MedicalMolecular Pathology and Critical AreaDivision of Liver Surgery and TransplantationUniversity Hospital of Pisa

Lymphoepithelioma-like hepatocellular carcinoma(LELHCC) is a rare form of undifferentiated carcinoma of the liver characterized by the presence of an abundant lymphoid infiltrate. Here,a case of LEL-HCC is described. An 81-year-old woman with a chronic hepatitis C infection was referred to the general surgery department of our hospital in August 2013 with a diagnosis of HCC. A past ultrasound examination had revealed a 60 mm-diameter nodular lesion in the third segment of the liver. After a needle biopsy,the lesion was diagnosed as HCC. The patient underwent surgery with a liver segmentectomy. Two additional nodes on the gastric wall were detected during the surgical operation. The histology of the removed specimen showed a poorly differentiated HCC with significant lymphoid stroma. Immunohistochemical studies revealed that the epithelial component was reactive for CK CAM5.2,CK8,CK18,CEA(polyclonal) and was focally positive for hepar-1 and that the lymphoid infiltrate was positive for CD3,CD4 and CD8. The tumor cells were negative for Epstein-Barr virus. The gastric nodes were ultimately determined to be two small gastrointestinal stromal tumors(GISTs).The synchronous occurrence of HCC and GIST is another very uncommon finding rarely described in the literature. Here,we report the clinicopathological features of our case,along with a review of the few cases present in the literature.

关键词： Lymphoepithelioma Lymphoepithelioma-like Hepatocel

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