On the Road from Formamide Ices to Nucleobases: IR-Spectroscopic Observation of a Direct Reaction between Cyano Radicals and Formamide in a High-Energy Impact Event

Martin Ferus; Svatopluk Civiš; Arnošt Mládek; Jiří Šponer; Libor Juha; Judit E. Šponer

doi:10.1021/ja310421z

Experimental Investigation of Impact Localization in Composite Plate Using Newly Developed Imaging Method

10.20944/preprints201808.0085.v3 ◽

2018 ◽

Author(s):

Mohammad Faisal Haider ◽

Asaad Migot ◽

Md Yeasin Bhuiyan ◽

Victor Giurgiutiu

Keyword(s):

Composite Plate ◽

High Energy ◽

Temperature Cycle ◽

Imaging Method ◽

Impact Event ◽

Scanning Method ◽

Time Frequency ◽

Energy Impact ◽

The Impact ◽

Impact Localization

This paper focused on impact localization of composite structures, which possess more complexity in the guided wave propagation because of the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to manufacture the composite plate. A structural health monitoring (SHM) technique is implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There are two types of impact event are considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals are then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detect and localize the impact event on the plate. The experimentally measured impact locations are compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in the immersion tank. Scanning results show that there is no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

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We’re on the road to nowhere: An exhibition of molecules to transport us

Molecules at an Exhibition ◽

10.1093/oso/9780198502661.003.0011 ◽

1998 ◽

Author(s):

John Emsley

Keyword(s):

Human Population ◽

Clean Energy ◽

High Energy ◽

High Tech ◽

World Population ◽

The Sun ◽

Solar Panels ◽

Sea Levels ◽

The Road ◽

On The Road

The rays of the Sun, and the motions of the Moon and Earth, provide energy in abundance. Light from the Sun is absorbed by plants on land and algae in the sea and is used to convert carbon dioxide into high energy carbohydrates, which in turn become oils. Together these provide most of the food energy for animals like ourselves. We can also harvest plants and trees and burn them to release this energy as heat. The sunlight which falls on barren terrain, or on the roofs of buildings, we can also gather by using solar panels to heat water or to make electricity. The sunlight which falls on the oceans leads to evaporation of water which is precipitated on land, and this too we can use to generate hydroelectricity. The Earth itself is a vast reservoir of heat below the crust, but this is not so easily tapped—although in parts of the world, such as New Zealand, hydrothermal heat is an important source of power. We can extract energy from the effects of the Earth’s daily rotation, partly through the weather systems this produces, by using windmills, and possibly through the rise and fall of sea levels, by using tidal barriers and wave power. These sources of clean energy should be able to provide all the fuel and electricity for a sustainable human population of several billion, provided we did most of our travelling on foot or by bicycle. How much these natural renewable sources could really provide is debatable, but we have the means to utilize them so they could supply enough food and energy for a world population of two or three billion, and at a level which allows for most of the high-tech living that we now take for granted. It might even be possible for most families to run a car, provided they were content to travel only a couple of thousand miles a year in it. The trouble is that there are already six billion of us, and forecasts are that this will reach ten billion by the middle of the next century. Most of these people will no doubt aspire to owning a car.

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Cherenkov Telescope Ring - An Idea for World Wide Monitoring of the VHE Sky

EPJ Web of Conferences ◽

10.1051/epjconf/201920703002 ◽

2019 ◽

Vol 207 ◽

pp. 03002

Author(s):

Tim Ruhe ◽

Dominik Elsässer ◽

Wolfgang Rhode ◽

Maximilian Nöthe ◽

Kai Brügge

Keyword(s):

Gamma Ray ◽

High Sensitivity ◽

High Energy ◽

Cherenkov Telescopes ◽

Cherenkov Telescope ◽

The Road ◽

Very High Energy ◽

Monitoring Effort ◽

On The Road ◽

Set Up

With very high energy (VHE) gamma-ray astronomy becoming a mature branch of observational astrophysics, and the multi-messenger sky being opened up by neutrino observatories and gravitational wave detectors, we here propose to set up a ring of imaging air Cherenkov telescopes – the Cherenkov Telescope Ring (CTR). The aim of this proposed project would be to facilitate continuous monitoring of sources on the VHE- and multi-messenger sky with minimal time delays and with high sensitivity. Development time and construction cost could be kept comparatively low by both including existing facilities into the monitoring effort, and by relying on substantial previous expertise gained in the community on the road towards the Cherenkov Telescope Array (CTA). This way, the Ring could prove to be a highly efficient facility greatly enhancing the science prospects for future ground-based high-energy astrophysics.

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Experimental Investigation of Impact Detection and Damage Extent Quantification

10.20944/preprints201808.0085.v1 ◽

2018 ◽

Author(s):

Mohammad Faisal Haider ◽

Asaad Migot ◽

Md Yeasin Bhuiyan ◽

Victor Giurgiutiu

Keyword(s):

Acoustic Waves ◽

Composite Structures ◽

Composite Plate ◽

High Energy ◽

Temperature Cycle ◽

Impact Event ◽

Scanning Method ◽

Time Frequency ◽

Energy Impact ◽

The Impact

This paper focused on impact localization of composite structures, which possess more complexity in the guided wave propagation because of the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to make the plate. A structural health monitoring (SHM) technique is implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There are two types of impact event are considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals are then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detect and localize the impact event on the plate. The experimentally measured impact locations are compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in an immersion tank. Scanning results show that there is no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

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Experimental Investigation of Impact Detection and Damage Extent Quantification

10.20944/preprints201808.0085.v2 ◽

2018 ◽

Author(s):

Mohammad Faisal Haider ◽

Asaad Migot ◽

Md Yeasin Bhuiyan ◽

Victor Giurgiutiu

Keyword(s):

Acoustic Waves ◽

Composite Structures ◽

Composite Plate ◽

High Energy ◽

Temperature Cycle ◽

Impact Event ◽

Scanning Method ◽

Time Frequency ◽

Energy Impact ◽

The Impact

This paper focused on impact localization of composite structures, which possess more complexity in the guided wave propagation because of the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to make the plate. A structural health monitoring (SHM) technique is implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There are two types of impact event are considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals are then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detect and localize the impact event on the plate. The experimentally measured impact locations are compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in an immersion tank. Scanning results show that there is no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

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Experimental Investigation of Impact Localization in Composite Plate Using Newly Developed Imaging Method

Inventions ◽

10.3390/inventions3030059 ◽

2018 ◽

Vol 3 (3) ◽

pp. 59 ◽

Cited By ~ 3

Author(s):

Mohammad Faisal Haider ◽

Asaad Migot ◽

Md Bhuiyan ◽

Victor Giurgiutiu

Keyword(s):

Composite Plate ◽

High Energy ◽

Temperature Cycle ◽

Imaging Method ◽

Impact Event ◽

Scanning Method ◽

Time Frequency ◽

Energy Impact ◽

The Impact ◽

Impact Localization

This paper focuses on impact localization of composite structures, which possess more complexity in the guided wave propagation due to the anisotropic behavior of composite materials. In this work, a composite plate was manufactured by using a compression molding process with proper pressure and temperature cycle. Eight layers of woven composite prepreg were used to manufacture the composite plate. A structural health monitoring (SHM) technique was implemented with piezoelectric wafer active sensors (PWAS) to detect and localize the impact on the plate. There were two types of impact event that were considered in this paper (a) low energy impact event (b) high energy impact event. Two clusters of sensors recorded the guided acoustic waves generated from the impact. The acoustic signals were then analyzed using a wavelet transform based time-frequency analysis. The proposed SHM technique successfully detected and localized the impact event on the plate. The experimentally measured impact locations were compared with the actual impact locations. An immersion ultrasonic scanning method was used to visualize the composite plate before and after the impact event. A high frequency 10 MHz 1-inch focused transducer was used to scan the plate in the immersion tank. Scanning results showed that there was no visible manufacturing damage in the composite plate. However, clear impact damage was observed after the high-energy impact event.

Download Full-text