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optical biosensor system for the quick and reliable detection of virus infections - VIROSENS 10

Optical biosensor system for the quick and reliable detectio...

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conference on Optics and Photonics for Counterterrorism, Crime Fighting, and defence X and optical materials and biomaterials in security and defence systems technology XI

作者： Proll, Guenther Hartjes, Anja Sinclair, Alexander Markovic, Goran Proell, Florian Patel, Pranav Niedrig, Matthias Biametrics GmbH Morgenstelle 18 D-72076 Tubingen Germany Ctr Biolog Secur Robert Koch Inst D-13353 Berlin Germany

ISBN: (纸本)9781628413168

Viral infections are of special threat because they can induce severe courses of disease but only few medical treatments are available. Because of socio-economic and climate changes, increased worldwide mobility and population growth, the risk of newly occurring and quickly spreading viral pathogens has increased. A diagnosis of these diseases at an early stage is essential for a quick risk assessment and a proper health management as well as patient's treatment in an optimal way. Currently, the diagnosis of such diseases is based on time consuming and costly detection methods that can only be performed by specially trained personnel in laboratories at specific security levels. Aim of the project VIROSENS is the development of a biosensor platform that can specifically detect virus particles as well as virus-specific antibodies out of biological matrices like blood, serum, plasma and other body fluids. For this purpose, a disposable cartridge for such antibody- and virus-arrays is designed and developed within the project. The optical detection of viruses is performed with a portable device that will be benchmarked and evaluated concerning currently used standard detection methods in terms of its analytical performance. Within this project, a novel combination of serological tests and direct detection of virus particles will be developed, which will provide faster and more reliable results than presently available and used test systems.

关键词： VIROSENS label-free detection direct test format infectious disease virus serology

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New side-chain azo-polymers for optical applications: Synthesis and characterization

New side-chain azo-polymers for optical applications: Synthe...

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conference on optical materials and biomaterials in security and defence systems technology IX

作者： Spiridon, Mitica Cezar Jerca, Florica Adriana Jerca, Valentin Victor Vuluga, Dumitru Mircea Vasilescu, Dan Sorin Romanian Acad Ctr Organ Chem Costin D Nenitescu 202B Spl Independentei CP 35-108 Bucharest 060023 Romania Ilie Murgulescu Inst Phys Chem Colloid Dept R-060021 Bucharest Romania Univ Politehn Bucuresti Dept Polymer Sci R-010072 Bucharest Romania

ISBN: (纸本)9780819492869

In this paper we report a series of side-chain polymers bearing a push-pull azo-moiety, from pseudo-stylbene type molecules. The azobenzene monomer is chemically incorporated through radical copolymerization in: poly(methacrylate), poly(styrene);and poly(oxazoline) matrices. The different classes of azo-polymers are discussed comparatively to one another from the point of view of: solubility, molecular weights, glass transition temperatures & thermal stability, chromophore contents, and as well as from the point of view of their spectral features.

关键词： azobenzene copolymers oxazoline NLO

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Analysis of creating an innovative micro-lens made of polydimethylsiloxane polymer on the end of the optical fibers 14

Analysis of creating an innovative micro-lens made of polydi...

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conference on optical materials and biomaterials in security and defence systems technology XIV

作者： Zboril, O. Cubik, J. Nedoma, J. Fajkus, M. Novak, M. Jargus, J. Stratil, T. Vasinek, V. VSB Tech Univ Ostrava Fac Elect Engn & Comp Sci Dept Telecommun 17 Listopadu 15 Ostrava 70833 Czech Republic

ISBN: (纸本)9781510613454;9781510613447

The article describes a method for fabrication of polymer optical micro-lenses using polydimethylsiloxane (PDMS) at the end of optical fibers. PDMS is an optically clear substance having a refractive index very similar to the optical fibers. Therefore it is an interesting material for optical purposes. PDMS is characterized by resistance to electromagnetic interference (EMI), enabling the use in electromagnetically noisy environments. These lenses could be used for example for the security applications. For the manufacture of the micro-lenses is used Sylgard silicone elastomer 184. When applied to the end of conventional optical fiber is cured by treatment at 100 degrees C +/- 5 degrees C. Authors performed a series of experimental measurements. The optical characteristics of the treated fibers compared with conventional fibers without micro- lenses. The fibers provided with optical lenses made of PDMS may be used for security applications, in the visible light communication (VLC) or as a microprobe.

关键词： Micro-lens Polydimethylsiloxane (PDMS) Electromagnetic Interference (EMI) security Applications Visible Light Communication (VLC) Microprobes

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Monitoring of the structural loads of tunnels using a distributed optical system BOTDR 14

Monitoring of the structural loads of tunnels using a distri...

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conference on optical materials and biomaterials in security and defence systems technology XIV

作者： Fajkus, Marcel Nedoma, Jan Mec, Pavel Novak, Martin Kajnar, Tomas Martinek, Radek Jaros, Jakub Hruby, David Vasinek, Vladimir VSB Tech Univ Ostrava Dept Telecommun Fac Elect Engn & Comp Sci Ostrava Czech Republic VSB Tech Univ Ostrava Dept Bldg Mat & Diagnost Struct Fac Civil Engn Ostrava Czech Republic VSB Tech Univ Ostrava Dept Cybernet & Biomed Engn Fac F Elect Engn & Comp Sci Ostrava Czech Republic

ISBN: (纸本)9781510613454;9781510613447

Authors of this article focused on the analysis of the use of distributed fiber-optic technology for security monitoring of structural loads of road and motorway tunnels. Authors focused on measurements of deformation utilizing Brillouin Time Domain Reflectometry (BOTDR). The principle is based on the measurement of the stimulated Brillouin scattering. The article describes the load of tunnel based on the real measurements made during the construction of the motorway tunnel in the Slovakia Republic in a time horizon of several months. Experiments were carried out with standard optical telecommunication cable with water-absorbing aramid yarns and jacketing of diameter 4.2 mm. The outcome of this article is an introductory analysis the use of fiber-optic technology for security monitoring of structural loads for road and motorway tunnels.

关键词： Brillouin time domain reflectometry structural monitoring tunnel structural loads

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Effects of the liquid-crystalline order on the light-induced deformation of azobenzene elastomers

Effects of the liquid-crystalline order on the light-induced...

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conference on optical materials and biomaterials in security and defence systems technology IX

作者： Toshchevikov, Vladimir Saphiannikova, Marina Heinrich, Gert Leibniz Inst Polymer Res Dresden D-01069 Dresden Germany

ISBN: (纸本)9780819492869

Azobenzene elastomers due to their ability to change the shape under light irradiation have a fascinating potential for technical applications serving as artificial muscles, sensors, microrobots, actuators, etc. The present study deals with the effects of the orientation liquid-crystalline (LC) interactions between the chromophores on the light-induced deformation of azobenzene elastomers. The orientation LC-interactions are taken into account in the framework of the mean-field approximation. Interaction of the chromophores with the light is described by means of an orientation potential which leads to preferable orientation of chromophores perpendicular to the light polarization direction. The statistics of network strands is described in the framework of the Gaussian approach. We consider photo-mechanical properties of azobenzene elastomers which are in the LC nematic state even at the absence of the light. It is shown that the light is able to induce a phase transition form the uniaxial to biaxial state with preferable orientation of chromophores perpendicular to the light polarization direction. The photomechanical behaviour is very sensitive to the chemical structure of network strands: an azobenzene elastomers can elongate (contract) along the polarization direction of the light, if the chromophores are oriented preferably perpendicular (parallel) to the backbones of network strands.

关键词： photosensitive smart materials polymer networks liquid crystals statistical physics

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optical materials and biomaterials in security and defence systems technology XVI

Optical Materials and Biomaterials in Security and Defence S...

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optical materials and biomaterials in security and defence systems technology XVI 2019

The proceedings contain 3 papers. The topic discussed include: optical materials for printed interconnects and sensors;new type Cu(N3)2 metal-azides for laser initiation;and optical limiting properties of polymer-dye ... 详细信息

ISBN: (纸本)9781510630338

关键词： optical materials

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optical materials for Printed Interconnects and Sensors 16

Optical Materials for Printed Interconnects and Sensors

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conference on optical materials and biomaterials in security and defence systems technology XVI

作者： Aga, R. S. Ouchen, F. Kreit, E. B. Bartsch, C. M. Heckman, E. M. KBR 2601 Mission Point BlvdSuite 300 Dayton OH 45431 USA US Air Force Res Lab Sensors Directorate 2241 Avionics Circle Wright Patterson AFB OH 45433 USA

ISBN: (数字)9781510630345

ISBN: (纸本)9781510630345

This work explores additive manufacturing technology to fabricate hybrid circuits comprising of optical and electronic materials as photonic and electrical interconnects, respectively. Several polymeric optical materials have been investigated (including SU8, PDMS, UV15 and Norland adhesives) as waveguides directly printed on commercial circuit boards such as FR4 and Rogers TC600. An optical waveguide printed over RF (radio frequency) transmission lines and surface mount electronic components is demonstrated. As an application, the waveguide is used as an alternative to traditional electrical interconnects to control an RF switch for routing an RF signal from a single source to different locations. This work also investigates the feasibility of printed polymeric waveguides as a sensing platform for monitoring humidity and temperature changes in electronic circuits. Results show that the SU8 waveguide responds significantly to change in temperature and humidity and the response is appropriate for logistics applications such as cold chain supply.

关键词： additive manufacturing interconnects electronic integration printed electronics optical sensor

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Fusion of optical flow based motion pattern analysis and silhouette classification for person tracking and detection 10

Fusion of optical flow based motion pattern analysis and sil...

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conference on Optics and Photonics for Counterterrorism, Crime Fighting, and defence X and optical materials and biomaterials in security and defence systems technology XI

作者： Tangelder, Johan W. H. Lebert, Ed Burghouts, Gertjan J. van Zon, Kasper den Uyl, Marten J. VicarVision Singel 160 NL-1015 AH Amsterdam Netherlands TNO NL-2597 The Hague Netherlands

ISBN: (纸本)9781628413168

This paper presents a novel approach to detect persons in video by combining optical flow based motion analysis and silhouette based recognition. A new fast optical flow computation method is described, and its application in a motion based analysis framework unifying human tracking and detection is outlined. Our optical flow algorithm represents optical flow by grid based motion vectors, which are computed very efficiently and robustly applying template matching. We model the motion patterns of the tracked human and non-human objects by the positions, velocities, motion magnitudes, and motion directions of their optical flow vectors, and build a random forest on these features. For recognition, the random forest computes a normalized score measuring the similarity of a track to a human track. Using edge detection on a motion image for each motion blob its silhouette is computed. Recognition scores are computed, which measure the similarity of the silhouettes with human silhouettes. The optical flow classifier and the silhouette classifier are used as a combined classifier. We analyze the ROC curve to set different decision thresholds on the recognition score for different scenarios. The experiments on the VIRAT test set demonstrate that for human detection the combination of the optical flow based motion method with one based on human silhouette analysis, obtains superior results, compared to the constituent methods.

关键词： optical flow based motion analysis silhouette based recognition behavior recognition similarity measures combined classifier VIRAT dataset ROC curve analysis

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Liquid explosive detection using near infrared LED 11

Liquid explosive detection using near infrared LED

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conference on Optics and Photonics for Counterterrorism, Crime Fighting, and defence XI;and optical materials and biomaterials in security and defence systems technology XII

作者： Itozaki, Hideo Ito, Shiori Sato-Akaba, Hideo Miyato, Yuji Osaka Univ Grad Sch Engn Sci 1-3 Machikaneyama Toyonaka Osaka 5608531 Japan

ISBN: (纸本)9781628418620

A bottle scanner to detect liquid explosive has been developed using technologies of near infrared. Its detection rate of liquid explosive is quite high and its false alarm rate of safe liquids quite low. It uses a light source with wide spectrum such as a halogen lamp. Recently a variety of LEDs have been developed and some of them have near infrared spectrum. Here a near infrared LED is tested as a light source of the liquid explosive detector. Three infrared LEDs that have a main peak of spectrum at 901nm, 936nm, and 1028 nm have been used as a light source to scan liquids. Spectrum widths of these LEDs are quite narrow typically less than 100 nm. Ten typical liquids have been evaluated by these LEDs and the correlation coefficients of a spectrum by an LED and a tungsten lamp were more than 0.98. This experiment shows that the infrared LED can be used as a light source for the liquid scanner. An LED has some merits, such as long life of more than some ten thousand hours and small consumption electric power of less than 0.2 W. When the LED is used as a light source for the liquid scanner, it is also more compact and handy.

关键词： liquid explosives near infrared bottled liquid airport security LED

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Automatic detection of suspicious behavior of pickpockets with track-based features in a shopping mall 10

Automatic detection of suspicious behavior of pickpockets wi...

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conference on Optics and Photonics for Counterterrorism, Crime Fighting, and defence X;and optical materials and biomaterials in security and defence systems technology XI

作者： Bouma, Henri Baan, Jan Burghouts, Gertjan J. Eendebak, Pieter T. van Huis, Jasper R. Dijk, Judith van Rest, Jeroen H. C. TNO NL-2597 AK The Hague Netherlands

ISBN: (纸本)9781628413168

Proactive detection of incidents is required to decrease the cost of security incidents. This paper focusses on the automatic early detection of suspicious behavior of pickpockets with track-based features in a crowded shopping mall. Our method consists of several steps: pedestrian tracking, feature computation and pickpocket recognition. This is challenging because the environment is crowded, people move freely through areas which cannot be covered by a single camera, because the actual snatch is a subtle action, and because collaboration is complex social behavior. We carried out an experiment with more than 20 validated pickpocket incidents. We used a top-down approach to translate expert knowledge in features and rules, and a bottom-up approach to learn discriminating patterns with a classifier. The classifier was used to separate the pickpockets from normal passers-by who are shopping in the mall. We performed a cross validation to train and evaluate our system. In this paper, we describe our method, identify the most valuable features, and analyze the results that were obtained in the experiment. We estimate the quality of these features and the performance of automatic detection of (collaborating) pickpockets. The results show that many of the pickpockets can be detected at a low false alarm rate.

关键词： Surveillance CCTV security behavior analysis threat recognition action recognition tracking

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