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Laser generated plasma followed by shocks and increasing cavitation bubble in a mini-glass tube
(2019)
There have been tried many types of micro-capillaries, square or round and with different
sizes of inner diameter. In which a cavitation bubble was created. The purpose of these
experiments was to observe the velocity of the shock wave just after the initial cavitation
bubble the rebound ones inside the micro-capillary and outside the micro-capillary. The most
of the method was spark to induced superheat limit of liquid. Here we used the laser-induced
breakdown (LIB) method. There were described the set cavitation setting that affects the
stability and size of the bubble. We used here shadowgraphy setup for visualized the
cavitation bubbles and shock wave with a camera. There were observed time development of
the shock wave velocity; the velocity of the initial shock wave inside the micro-capillary was
higher than the shock velocity outside the micro-capillary
CargoTube is an innovative approach for decarbonized, efficient, effective, and safe transport. Carbon neutral operation providing high-speed movement of goods enables a sustainable link between urban and economic regions, such as production facilities. Air resistance causes the vast majority of the energy consumption in high-speed transportation. The losses by air friction scale with the velocity cubed and are unavoidably lost by aero- and thermodynamic laws. The straightforward solution operates the transportation within a tube at 100-1000 fold reduced air pressure. Low-pressure tube transport employs existing technology with low infrastructure requirements for high-throughput cargo applications based on hyperloop technologies. CargoTube is quicker and less costly to deploy, but complementary to and compatible with emerging hyperloop standards and technologies.
CargoTube is an innovative approach for decarbonized, efficient, effective, and safe transport. A CargoTube is an Hyperloop-based transport system designed to transport goods. This paper demonstrates how such systems are planned by a traditional phased approach as used for the planning of road construction. The planning tasks are supported by tools such as spreadsheets, discrete event simulation and lifecycle performance assessment allowing the anticipation of performance from different perspectives including economic and environmental dimensions. An example connecting a Logistics Service Park (LSP) with an automotive production site is used to demonstrate the approach and to show the identified benefits of such a system in comparison with traditional transport approaches.
CargoTube is a new approach for cost-efficient Low-Pressure Tube Transport (LPTT) which uses established technologies and can be implemented quickly. This makes it an affordable alternative to developments such as complex conventional hyperloop systems. CargoTube is less costly to deploy and affords lower safety and infrastructure requirements. At the same time, it is complementary to and compatible with emerging hyperloop standards and technologies. The benefits of zero direct emission while still providing high-speed movement of goods with great potential for sustainably, linking urban areas, economic regions, and production facilities are obvious.
Der Transport von Personen und Wirtschaftsgütern mit einer Art Rohrpostsystem steht mit der Entwicklung der Hyperloop-Technologie vor einer Renaissance, technisch innovativ, nachhaltig energieeffizient und wirtschaftlich realisierbar. Global werden Versuchsstrecken geplant und vorbereitet, um die Machbarkeit zu überprüfen. An dem von SpaceX seit 2016 jährlich ausgeschriebenen internationalen studentischen Wettbewerb „Hyperloop Pod Competition“ in Hawthorne, Los Angeles, nahm das Hochschulteam der Hochschule Emden/Leer und der Universität Oldenburg „HyperPodX“ bereits zweimal am Konstruktionswettbewerb mit nur noch 19 weiteren Teams teil.
Die Bedeutung und Entwicklung einer europäischen Großforschungseinrichtung für Hyperlooptechnologien
(2022)
Der Logistiksektor und die Geschwindigkeit des heutigen Transportwesens sowie der Personentransport gehören zu den Treibern des gegenwärtigen Lebensstandards und Wohlstandes. Die schnelle Verfügbarkeit von Waren, Dienstleistungen und anderen Gütern spielt eine zentrale sozioökonomische Rolle in der modernen Gesellschaft. Gleichzeitig ist das Transportwesen für etwa 25 % der weltweiten CO2 Emissionen verantwortlich und somit sind Innovationen in diesem Sektor unerlässlich, um die Pariser Klimaziele einzuhalten.
Current laser surgery on vocal chords requires the patient to be under general anaesthesia due to relatively low cutting speed and precision. Even minor surgeries can change vocal properties, requiring lengthy post-operative therapy. To solve this problem and reduce recovery time we propose a laryngoscope capable of performing the surgery while the patient is awake. To realize this, it is necessary for each cut to be made on the shortest time scale with the highest precision possible. It is also important to have high speed feedback to initiate or terminate the cutting process as well as to maintain the proper cutting position. In this laryngoscope we employ a coaxial MHz OCT and laser cutting system with a MEMS galvo scanner combined with a high speed stereo camera set. The MHz OCT is responsible for axial feedback and measuring the depth of cut while the stereo camera set is used to adjust the MEMS scanner for lateral offsets. We have determined the optimal optical layout for the laryngoscope using Zemax and have developed 3D CAD models of the prototype demonstrator prior to fabrication and assembly. This new laryngoscope could make laser cuts up to 50% smaller in width than traditional multimode fiber based cuts, in addition to reducing overall surgery time and increasing the precision of each cut.
Die durch die Logistik verursachten Luftschadstoffemissionen (NOx), Treibhausgasemissionen (CO2), Feinstaubemissionen (PM) und Lärm-/Lichtemissionen führen systemisch zu einer reduzierten Lebensqualität in urbanen Räumen. Industriestandorte werden bevorzugt durch LKW-Verkehre versorgt, liegen aber durch die zunehmende Urbanisierung und das Wachsen großer Metropolen vermehrt in innerstädtischen Bereichen. Die Transformation der Transportlogistik über externe Logistik-Hubs mit einer individuellen Direktverbindung (CargoTube), insbesondere zu Großbetrieben, könnte intensive Lieferverkehrsbelastungen minimieren.
A new technique which combines the advantages of darkfield microscopy with those of confocal microscopy has been developed. The Massively Parallel Confocal darkfield method implemented on a DMD-based confocal platform allows for detection of non-fluorescing particles with dimensions below the diffraction limit. The lateral resolution and depth discrimination of three dimensional objects are improved relative to conventional darkfield microscopy.
A Michelson Objective based Full Field Optical Coherence Tomography system is combined with fluorescence imaging and deconvolved with the point spread function to enhance the image resolution of biological tissue, exceeding classical resolution limits.