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swelling-Based Chemical sensing With Unmodified Optical Fibers

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Photonic sensors 2022年第2期12卷 99-104页

作者： Alin JDERU Dorel DOROBANTU dominik ZIEGLER Marius ENACHEsCU s.C.NanoPro sTART MC s.R.L. Bucharest 033091Romania Center for surface science and Nanotechnology University Politehnica of BucharestBucharest 060042Romania Academy of Romanian scientists Bucharest 050094Romania

We use distributed fiber optic strain sensing to examine swelling of the fiber’s polymer *** distributed sensing technique that uses unmodified low-cost telecom fibers opens a new dimension of applications that include leak detection,monitoring of water quality,and waste *** a short-range length scale,the technology enables“lab-on-a-fiber”applications for food processing,medicine,and biosensing for *** chemical sensing is realized with unmodified low-cost telecom optical fibers,namely,by using swelling in the coating material of the fiber to detect specific *** generic and able to work in various areas such as environmental monitoring,food analysis,agriculture or security,the proposed chemical sensors can be targeted for water quality monitoring,or medical diagnostics where they present the most groundbreaking ***,the technique is without restrictions applicable to longer range installations.

关键词： Chemical sensing distributed fiber optic strain short range sensing Brillouin optical time domain analysis

Remote sensing of bark beetle damage in Norway spruce individual tree canopies using thermal infrared and airborne laser scanning data fusion

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Forest Ecosystems 2022年第5期9卷 710-723页

作者： Agata Zakrzewska dominik Kopec Department of Biogeography Paleoecology and Nature ProtectionFaculty of Biology and Environmental ProtectionUniversity of LodzŁodzPoland MGGP Aero sp.z o.o. TarnowPoland

Background:Increasing threat to Central Europe’s forests from the growing population of the European spruce bark beetle Ips typographus (L.) calls for developing highly effective methods of detection of the infestation spots. The main goal of this study was to establish an automatic workflow for detection of dead trees and trees in poor condition of Picea abies using Middle Wave Infrared spectral range obtained from the ***:The studies were conducted in Wigry National Park (Poland) in 2020. A fusion of aircraft thermal data and laser scanning was used. synchronous with thermal data acquisition ground reference data were obtained for P. abies in different health conditions. Determination of the range of canopy temperatures characteristic of the three condition states (‘healthy’,‘poor condition’,‘dead’) was performed using K-mean clustering. The accuracy of the method was evaluated on two validation sets:(1) individual tree canopies determined by photointerpretation, and (2) automatic segmentation of laser scanning ***:The results showed that the average temperature of ‘healthy’trees was 27.70℃, trees in ‘poor condition’28.57℃, and ‘dead’trees 30.17℃. High temperature differences between ‘healthy’and ‘dead’P. abies made it possible to distinguish these two condition classes with high accuracy. Lower accuracies were obtained for the class of ‘poor condition’, which was found to be confusing with both ‘healthy’and ‘dead’trees. According to results from the first validation set, a high overall accuracy of 0.60 was obtained. For the second validation set, the overall accuracy was reduced by 11%.Conclusions:This study indicates that canopy temperature recorded from the airborne level is a variable that differentiates ‘healthy’spruces from those in ‘poor condition’and the ‘dead’trees. The results confirmed that thermal and airborne laser scanning data fusion allows for creating a quick and simple workflow, which can successfully separate individual tre

关键词： Infrared thermography Picea abies Ips typographus Middle wave infrared Forest invasion Forest health K-mean clustering

多相补偿距离继电器在振荡且伴随单相接地故障下的动作性能分析

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中国电机工程学报 2013年第34期33卷 214-222页

作者：崔柳董新洲施慎行王宾 dominik Bak 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系) 北京市海淀区100084

被广泛应用于电力系统的距离保护多采用阻抗距离继电器为核心元件。阻抗距离继电器受系统振荡影响,需配合振荡闭锁元件构成保护,使得距离保护变得复杂。以多相补偿距离继电器为核心的距离保护能够防止振荡对距离保护的影响而无需时间闭... 详细信息

被广泛应用于电力系统的距离保护多采用阻抗距离继电器为核心元件。阻抗距离继电器受系统振荡影响,需配合振荡闭锁元件构成保护,使得距离保护变得复杂。以多相补偿距离继电器为核心的距离保护能够防止振荡对距离保护的影响而无需时间闭锁元件。因此,对多相补偿距离继电器动作特性进行深入分析是十分必要的。通过分析多相补偿距离继电器的动作判据,给出了多相补偿距离继电器包含的3个元件在系统振荡且发生单相接地故障情况下的动作特性,包括反映故障相元件的拒动范围和反映非故障相元件的误动范围,并指出了其在构成距离保护II段、III段时的不足。PsCAD仿真结果验证了所得结论。

关键词：距离保护电力系统振荡多相补偿距离继电器单相接地故障

极化电流行波方向继电器在带并联电抗器输电线上的特性

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电力系统自动化 2013年第21期37卷 169-175页

作者：任立董新洲施慎行王宾 dominik BAK 清华大学电机工程与应用电子技术系北京市100084

由于传统的光纤电流差动保护无法直接应用于带并联电抗器的输电线路,均需要进行补偿。基于极化电流行波方向继电器应用于带并联电抗器的线路,文中深入分析了并联电抗器上的行波过程、传输频域分析以及对基于小波变换的极化电流行波方向... 详细信息

由于传统的光纤电流差动保护无法直接应用于带并联电抗器的输电线路,均需要进行补偿。基于极化电流行波方向继电器应用于带并联电抗器的线路,文中深入分析了并联电抗器上的行波过程、传输频域分析以及对基于小波变换的极化电流行波方向继电器的影响。结果表明,带并联电抗器的线路不会影响暂态行波波头的方向,同时也不会影响工频行波波头的提取。因此,基于极化电流行波方向继电器的保护能够直接适用于带有并联电抗器的线路。电磁暂态程序(EMTP)的仿真和实际装置的测试结果均表明了该保护在带并联电抗器线路上的优良特性。

关键词：极化电流行波并联电抗器小波变换行波保护

The mutational dynamics of the sARs-CoV-2 virus in serial passages in vitro

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Virologica sinica 2022年第2期37卷 198-207页

作者： sissy Therese sonnleitner stefanie sonnleitner Eva Hinterbichler Hannah Halbfurter dominik BCKopecky stephan Koblmüller Christian sturmbauer Wilfried Posch Gernot Walder Dr.Gernot Walder GmbH Medical LaboratoryDepartment of VirologyAusservillgraten9931Austria Division of Hygiene and Medical Microbiology Medical University of InnsbruckInnsbruck6020Austria Institute of Biology University of GrazGraz8010Austria

since its outbreak in 2019,severe Acute Respiratory syndrome Coronavirus 2(sARs-Co V-2)keeps surprising the medical community by evolving diverse immune escape mutations in a rapid and effective *** gain deeper insight into mutation frequency and dynamics,we isolated ten ancestral strains of sARs-Co V-2 and performed consecutive serial incubation in ten replications in a suitable and common cell line and subsequently analysed them using RT-q PCR and whole genome *** those lines we hoped to gain fundamental insights into the evolutionary capacity of sARs-Co V-2 in *** results identified a series of adaptive genetic changes,ranging from unique convergent substitutional mutations and hitherto undescribed *** region coding for spike proved to be a mutational hotspot,evolving a number of mutational changes including the already known substitutions at positions s:484 and s:*** discussed the evolution of all specific adaptations as well as possible reasons for the seemingly inhomogeneous potential of sARs-Co V-2 in the adaptation to cell *** combination of serial passage in vitro with whole genome sequencing uncovers the immense mutational potential of some sARs-Co V-2 *** observed genetic changes of sARs-Co V-2 in vitro could not be explained solely by selectively neutral mutations but possibly resulted from the action of directional selection accumulating favourable genetic changes in the evolving variants,along the path of increasing potency of the *** among a high number of quasi-species in the sARs-Co V-2 in vitro population gene pool may reinforce directional selection and boost the speed of evolutionary change.

关键词： sARs-CoV-2 Whole genome sequencing(WGs) Mutational dynamics Adaptation serial passage in vitro

Optical Frequency Comb-Based Cavity-Enhanced Fourier-Transform spectroscopy:Application to Collisional Line-shape study

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Chinese Journal of Chemical Physics 2020年第1期33卷 23-30页

作者： Akiko Nishiyama Grzegorz Kowzan dominik Charczun Ryszard s.Trawinski Piotr Mas lowski Institute of Physics Faculty of PhysicsAstronomy and InformaticsNicolaus Copernicus University in TorunTorun 87-100Poland

Direct-comb spectroscopy techniques uses optical frequency combs(OFCs)as spectroscopic light *** deliver high sensitivity,high frequency resolution and precision in a broad spectral *** to these features,the field has burgeoned in recent *** this work we constructed an OFC-based cavity-enhanced Fourier-transform spectrometer in the nearinfrared region and used it for a line-shape study of rovibrational transitions of CO perturbed by *** highly sensitive measurements spanned the wavenumber range from 6270 cm^-1 to 6410 cm^-1,which covered both P and R branch of the second overtone band of *** spectrometer delivers high-resolution surpassing the Fourier-transform resolution limit determined by interferogram length,successfully removing ringing and broadening effects caused by instrumental line shape *** instrumental-line-shape-free method and high signal-to-noise ratio in the measurement allowed us to observe collisional effects beyond those described by the Voigt *** retrieved collisional line-shape parameters by fitting the speed-dependent Voigt profile and found good agreement with the values given by precise cavity ring-down spectroscopy measurements that used a continuous-wave laser referenced to a stabilized *** results demonstrate that OFC-based cavity-enhanced Fouriertransform spectroscopy is a strong tool for accurate line-shape studies that will be crucial for future spectral databases.

关键词： Carbon monoxide spectral lineshapes Optical frequency comb Cavity enhanced absorption spectroscopy Fourier-transform spectroscopy

Diagnostic imaging advances in murine models of colitis

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World Journal of Gastroenterology 2016年第3期22卷 996-1007页

作者： Markus Brückner Philipp Lenz Marcus M Mücke Faekah Gohar Peter Willeke Dirk Domagk dominik Bettenworth Department of Medicine B University Hospital of MünsterAlbert-Schweitzer-Campus 1D-48149 MünsterGermany Department of Paediatric Rheumatology and Immunology University Hospital of MünsterAlbert-Schweitzer-Campus 1D-48149 MünsterGermany Department of Medicine D University Hospital of MünsterAlbert-Schweitzer-Campus 1D-48149 MünsterGermany Department of Medicine I Josephs-Hospital WarendorfAcademic Teaching HospitalUniversity of MünsterAm Krankenhaus 2D-48231 WarendorfGermany

Inflammatory bowel diseases(IBD) such as Crohn's disease and ulcerative colitis are chronic-remittent inflammatory disorders of the gastrointestinal tract still evoking challenging clinical diagnostic and therapeutic situations. Murine models of experimental colitis are a vital component of research into human IBD concerning questions of its complex pathogenesis or the evaluation of potential new drugs. To monitor the course of colitis, to the present day, classical parameters like histological tissue alterations or analysis of mucosal cytokine/chemokine expression often require euthanasia of animals. Recent advances mean revolutionary noninvasive imaging techniques for in vivo murine colitis diagnostics are increasingly available. These novel and emerging imaging techniques not only allow direct visualization of intestinal inflammation, but also enable molecular imaging and targeting of specific alterations of the inflamed murine mucosa. For the first time, in vivo imaging techniques allow for longitudinal examinations and evaluation of intra-individual therapeutic response. This review discusses the latest developments in the different fields of ultrasound, molecularly targeted contrast agent ultrasound, fluorescence endoscopy, confocal laser endomicroscopy as well as tomographic imaging with magnetic resonance imaging, computed tomography and fluorescence-mediated tomography,discussing their individual limitations and potential future diagnostic applications in the management of human patients with IBD.

关键词： confocal laser endomicroscopy contrastenhanced ultrasound Dextran sodium sulphate colitis experimental colitis fluorescence imaging endoscopy Imaging Inflammatory bowel disease Tomography

Towards in-situ diagnostics of multi-photon 3D laser printing using optical coherence tomography

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Light(Advanced Manufacturing) 2022年第3期3卷 219-233页

作者： Roman Zvagelsky Frederik Mayer dominik Beutel Carsten Rockstuhl Guillaume Gomard Martin Wegener Institute of Applied Physics(APH) Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany Institute of Theoretical solid state Physics(TFP) Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany Institute of Nanotechnology(INT) Karlsruhe Institute of Technology(KIT)76344 Eggenstein-LeopoldshafenGermany Carl Zeiss AG Zeiss Innovation HubHermann-von-Helmholtz-Platz 676344 Eggenstein-LeopoldshafenGermany

In recent years,multi-photon 3D laser printing has become a widely used tool for the fabrication of micro-and nanostructures for a large variety of ***,thorough sample characterisation is key for an efficient optimisation of the printing *** date,three-dimensional microscopic inspection has usually been carried out on finished 3D printed microstructures,that is,using ex-situ *** contrast,in-situ 3D characterization tools are desirable for quickly assessing the quality and properties of 3D printed *** these lines,we present and characterise a Fourier-domain optical coherence tomography(FD-OCT)system that can be readily integrated into an existing 3D laser lithography *** demonstrate its capabilities by examining different 3D printed polymer microstructures immersed in a liquid *** such samples,local reflectivity arises from the(refractive-index)contrasts between the polymerised and non-polymerised ***,the refractive index of the printed material can be ***,we demonstrate that the reflectivity of polymer-monomer transitions exhibits time-dependent behaviour after *** by transfer-matrix calculations,we explain this effect in terms of the time-dependent graded-index transition originating from monomer diffusion into the polymer ***,we show exemplary 3D reconstructions of printed structures that can be readily compared with 3D computer designs.

关键词： Multi-photon 3D laser printing Optical coherence tomography In-situ diagnostics

Dried fruit pomace inclusion in poultry diet:growth performance, intestinal morphology and physiology

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Journal of Animal science and Biotechnology 2020年第4期11卷 1100-1116页

作者： Elena Colombino Ilario Ferrocino Ilaria Biasato Luca simone Cocolin Daniel Prieto-Botella Zenon Zduńczyk Jan jankowski Joanna Milala Monika Kosmala Bartosz Fotschki Maria Teresa Capucchio Jerzy Juśkiewicz Department of Veterinary sciences University of TorinoLargo Paolo Braccini 2Grugliasco10095 TurinItaly Department of Agricultural Forest and Food SciencesUniversity of TorinoTorinoItaly Research Team on Occupational Therapy(InTeO) Department of Surgery and PathologyUniversity Miguel Hernandez of ElcheAlicanteSpain Polish Academy of sciences Institute of Animal Reproduction and Food ResearchOlsztynPoland Department of Poultry science University of Warmia and MazuryOlsztynPoland Institute of Chemical Technology of Food Lodz University of TechnologyLodzPoland.

Background: Fruit pomaces are by-products rich in polyphenol compounds and dietary fiber. They seem to play an important role in regulating the gut microbiota, morphology and physiology. The aim of this study was to assess whether apple(A), blackurrant(B) or strawberry(s) pomaces could be suitable ingredients in broiler diets and their effect on gut health. A total of 480 male broilers were randomly allotted to 8 dietary treatments with lower(3%-L) or higher(6%-H) dietary fiber content: two control groups(CL/CH), two A diets(AL/AH), two B diets(BL/BH), two s diets(sL/sH). Diet and fruit pomaces were chemically analyzed to assess polyphenol concentration and fibre fraction content. After the evaluation of growth performance, 6 birds/group were slaughtered at 35 days of age. Morphometric and histopathological investigations were performed on duodenum, jejunum and *** were collected to perform microbiota evaluation by 16 s DNA sequencing. Weight, viscosity, enzymatic activity, short chain fatty acid(sCFAs) and ammonia concentration were determined in ileum and/or ceca ***: A pomace and A diets showed the lowest polyphenol content and the highest content of soluble fibre fraction. No significant differences were observed for growth performance, gut morphometry and histopathology(P > 0.05). Dietary fruit pomace inclusion increased the weight of ileum and ceca and the ileum digesta viscosity(P s groups showed lower bacterial α-glucosidase activity than C groups. Moreover,small intestine sCFAs concentration was higher in fruit pomaces diets(P s groups showed lower ammonia concentration and higher sCFAs than C. Dietary treatments also influenced the activity of α-glucosidase, α-galactosidase, β-galactosidase β-glucuronidase and xylase. Regarding microbiota, at phylum level,Firmicutes were differentially abundant across treatment(maximum for C and minimum in s, FDR > 0.05). At genus level, an increase

关键词： Fruit Pomace Gut health Morphohistology Polyphenols Poultry