Potential of hyperspectral imaging to assess the stability of mudflat surfaces by mapping sediment characteristics

2003 ◽  
Author(s):  
Geoff Smith ◽  
Andrew Thomson ◽  
Iris Moller ◽  
Jacco Kromkamp
Keyword(s):  
Hyperspectral Imaging ◽  
Sediment Characteristics ◽  
The Stability

scholarly journals The Future of Hyperspectral Imaging

2019 ◽  
Vol 5 (11) ◽  
pp. 84 ◽  
Author(s):  
Stefano Selci
Keyword(s):  
Hyperspectral Imaging ◽  
Age Determination ◽  
Plant Diseases ◽  
Potato Tubers ◽  
Dynamic Scenes ◽  
New Methods ◽  
The Future ◽  
Using Data ◽  
The Stability

The Special Issue on hyperspectral imaging (HSI), entitled “The Future of Hyperspectral Imaging”, has published 12 papers. Nine papers are related to specific current research and three more are review contributions: In both cases, the request is to propose those methods or instruments so as to show the future trends of HSI. Some contributions also update specific methodological or mathematical tools. In particular, the review papers address deep learning methods for HSI analysis, while HSI data compression is reviewed by using liquid crystals spectral multiplexing as well as DMD-based Raman spectroscopy. Specific topics explored by using data obtained by HSI include alert on the sprouting of potato tubers, the investigation on the stability of painting samples, the prediction of healing diabetic foot ulcers, and age determination of blood-stained fingerprints. Papers showing advances on more general topics include video approach for HSI dynamic scenes, localization of plant diseases, new methods for the lossless compression of HSI data, the fusing of multiple multiband images, and mixed modes of laser HSI imaging for sorting and quality controls.

Hyperspectral imaging as powerful technique for evaluating the stability of Tattoo Wall®

2020 ◽  
Vol 157 ◽  
pp. 104866 ◽  
Author(s):  
G. Agresti ◽  
G. Bonifazi ◽  
G. Capobianco ◽  
L. Lanteri ◽  
C. Pelosi ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Powerful Technique ◽  
The Stability

scholarly journals A novel laboratory method for the detection and identification of cyanobacteria using hyperspectral imaging : hyperspectral imaging for cyanobacteria detection

2021 ◽  
Author(s):  
Kaytee Pokrzywinski ◽  
Cliff Morgan ◽  
Scott Bourne ◽  
Molly Reif ◽  
Kenneth Matheson ◽  
...  
Keyword(s):  
Hyperspectral Imaging ◽  
Laboratory Method ◽  
Army Corps ◽  
Imaging Method ◽  
Accurate Identification ◽  
Active Growth ◽  
Detection And Identification ◽  
Aerial Platforms ◽  
Field Deployment ◽  
The Stability

To assist US Army Corps of Engineers resource managers in monitoring for cyanobacteria bloom events, a laboratory method using hyperspectral imaging has been developed. This method enables the rapid detection of cyanobacteria in large volumes and has the potential to be transitioned to aerial platforms for field deployment. Prior to field data collection, validation of the technology in the laboratory using monocultures was needed. This report describes the development of the detection method using hyperspectral imaging and the stability/reliability of these signatures for identification purposes. Hyperspectral signatures of different cyanobacteria were compared to evaluate spectral deviations between genera to assess the feasibility of using this imaging method in the field. Algorithms were then developed to spectrally deconvolute mixtures of cyanobacteria to determine relative abundances of each species. Last, laboratory cultures of Microcystis aeruginosa and Anabaena sp. were subjected to varying macro (nitrate and phosphate) and micro-nutrient (iron and magnesium) stressors to establish the stability of signatures within each species. Based on the findings, hyperspectral imaging can be a valuable tool for the detection and monitoring of cyanobacteria. However, it should be used with caution and only during stages of active growth for accurate identification and limited interference owing to stress.

scholarly journals KONDISI GEOMORFOLOGI DAN KARAKTERISTIK SEDIMEN DASAR LAUT DI WILAYAH PERAIRAN SEBAGIN UNTUK EVALUASI TAPAK PLTN DI BANGKA SELATAN

2015 ◽  
Vol 17 (2) ◽  
pp. 97
Author(s):  
Yuliastuti Yuliastuti ◽  
Heni Susiati ◽  
Yarianto Sugeng Budi Susilo
Keyword(s):  
Bottom Sediment ◽  
Water Intake ◽  
Depth Range ◽  
Sediment Characteristics ◽  
Single Beam ◽  
Sea Bottom ◽  
Sea Bed ◽  
The Stability ◽  
Result Analysis ◽  
Echo Sounder

ABSTRAK KONDISI GEOMORFOLOGI DAN KARAKTERISTIK SEDIMEN DASAR LAUT DI WILAYAH PESISIR PERAIRAN SEBAGIN UNTUK EVALUASI TAPAK PLTN DI BANGKA SELATAN. Telah dilakukan penelitian mengenai kondisi geomorfologi dan karakteristik sedimen dasar laut di wilayah perairan sebagian, Bangka Selatan. Informasi geomorfologi dasar laut sangat berguna dalam hal interpretasi struktur-struktur geologi yang berada di dasar laut. Sedangkan informasi karakteristik sedimen dasar laut bermanfaat untuk memberikan gambaran perlapisan batuan dasar laut dalam kaitannya dengan kestabilan tapak PLTN terkait aspek kegempaan dan penentuan posisi water intake. Penelitian ini bertujuan untuk mengevaluasi kondisi geomorfologi dan karakterisasi sedimen dasar laut di perairan Sebagin, Bangka Selatan. Metodologi yang dipakai untuk mengevaluasi kondisi geomorfologi dasar laut adalah Multi Beam Echo Sounder (MBES) dan Single Beam Echo Sounder (SBES). Sedangkan untuk karakterisasi sedimen dasar laut dilakukan dengan pengukuran seismik refleksi resolusi tinggi menggunakan sub bottom profiling (SBP) dan uji sampel sedimen di daerah penelitian. Hasil penelitian menunjukkan bahwa daerah penelitian merupakan perairan dangkal dengan kedalaman 1- 59 m. Profil geomorfologi dasar laut daerah penelitian cenderung tidak beraturan dan berdasarkan interpretasi seismik tidak ditemukan adanya patahan. Hasil analisis sedimen dasar laut menunjukkan bahwa, distribusi lumpur mendominasi daerah perairan calon tapak PLTN. Kata Kunci : geomorfologi, tapak PLTN, sedimen, sub bottom profile.   ABSTRACT GEOMORPHOLOGICAL CONDITION AND SEA BOTTOM SEDIMENT CHARACTERISTICS OF SEBAGIN COAST FOR NPP SITE EVALUATION IN SOUTH BANGKA. Study on geomorphological condition and sea bottom sediment in the coastal area of Sebagin, South Bangka Regency, Bangka Belitung Province has been performed. Geomorphological of the seabed was valuable to identify geological structures that exist on the seabed layers. Whereas, sediments seabed characteristics was useful to provide portrait of seabed layer due to the stability of NPP site concerning the seismic aspect and the determination of water intake position. The objective of the study was to evaluate geomorphological condition and sea bed sediment characteristics in the South Bangka sea. Methodology used for evaluating geomorphological of the sea bed were Multi Beam Echo Sounder (MBES) and Single Beam Echo Sounder (SBES). While for sea bottom sediment characteristics, SBP together with sediment sample analysis were used. The result of the study showed that the study area was a shallow water sea with a depth range of 1-59 m. Geomorphological profile of the sea bed tend to be irregular and based on the seismic interpretation, there were no fault exists. Result analysis on the sea bottom sediment showed that clay distribution dominated the study area. Keywords: geomorphology, NPP site, sediment, sub bottom profile.

scholarly journals Analysis of scour depth in the case of parallel bridges using HEC-RAS

2020 ◽  
Vol 20 (8) ◽  
pp. 3419-3432
Author(s):  
Darshan J. Mehta ◽  
S. M. Yadav
Keyword(s):  
Scour Depth ◽  
River Engineering ◽  
Flood Events ◽  
Sediment Characteristics ◽  
River Bed ◽  
Scour Holes ◽  
Minimum Depth ◽  
The Stability ◽  
Bridge Foundation ◽  
Hydraulic Stability

Abstract Scour is now one of the main problems for river as well as for coastline engineering. Bridges are the vital structures which must be designed to prevent failure against the effects of scour. Scour holes can occur without warning and cause the failure of a bridge. The main significant issues in hydraulic and river engineering are to determine the connection between parameters affecting the maximum and minimum depth of scour. The scour depth in the alluvial stream below a river bed differs based on the flows, pier shape, pier size and sediment characteristics. Dual bridges of basically the same structure are placed parallel to and only a small distance away from an existing bridge, either on the upstream or downstream side. Naturally, the backwater generated by dual bridges is bigger than that of a single bridge but lower than the value resulting from separate consideration of the two bridges. In the present work, an hydraulic model is used to simulate the stability of a bridge in the study area, namely ‘Sardar Bridge’ on the Tapi river. Scour profiles for various flood events have been assessed for a particular bridge. The velocity of flow is used to estimate depths of scour at different piers and abutments. Estimating depth of the scour during the design can significantly decrease the overall cost of bridge foundation construction. Results from the present study show that construction of a new bridge should be proposed on the upstream side rather than downside side of the existing bridge. By doing so, hydraulic stability of the existing bridge is ensured.

The Calculation of the Nan Poping Yellow River Bridge in Lanzhou-Chongqing Railway

2014 ◽  
Vol 1065-1069 ◽  
pp. 989-991
Author(s):  
Wen She He ◽  
Lan Zhen Wu ◽  
Su Min Zhao ◽  
Kai Chang
Keyword(s):  
Yellow River ◽  
Local Scour ◽  
The Yellow River ◽  
Embedment Depth ◽  
Sediment Characteristics ◽  
Bridge Construction ◽  
Erosion Depth ◽  
The Stability

Based on introducing engineering background and characteristics of river, the Yellow River in lanzhou section of the hydrological and sediment characteristics and characteristics of riverbed evolution are analyzed. On this basis, determine the once-in-a-century flow, and calculate the once-in-a-century flow when the bridge was analyzed and local scour of general erosion depth, scope of backwater height, etc.On the bridge of the embedment depth, clearance under the bridge, such as the check, and the bridge construction impact on the stability of river regime is analyzed.

scholarly journals Hyperspectral Imaging as Powerful Technique for Investigating the Stability of Painting Samples

2019 ◽  
Vol 5 (1) ◽  
pp. 8 ◽  
Author(s):  
Giuseppe Bonifazi ◽  
Giuseppe Capobianco ◽  
Claudia Pelosi ◽  
Silvia Serranti
Keyword(s):  
Hyperspectral Imaging ◽  
Gum Arabic ◽  
Short Wave ◽  
Infrared Range ◽  
Artificial Ageing ◽  
Photo Degradation ◽  
Before And After ◽  
The Stability ◽  
Ageing Procedure ◽  
Surface Changes

The aim of this work is to present the utilization of Hyperspectral Imaging for studying the stability of painting samples to simulated solar radiation, in order to evaluate their use in the restoration field. In particular, ready-to-use commercial watercolours and powder pigments were tested, with these last ones being prepared for the experimental by gum Arabic in order to propose a possible substitute for traditional reintegration materials. Samples were investigated through Hyperspectral Imaging in the short wave infrared range before and after artificial ageing procedure performed in Solar Box chamber under controlled conditions. Data were treated and elaborated in order to evaluate the sensitivity of the Hyperspectral Imaging technique to identify the variations on paint layers, induced by photo-degradation, before they could be detected by eye. Furthermore, a supervised classification method for monitoring the painted surface changes, adopting a multivariate approach was successfully applied.

Open discussion

1982 ◽  
Vol 99 ◽  
pp. 605-613
Author(s):  
P. S. Conti
Keyword(s):  
Buenos Aires ◽  
Large Mass ◽  
List Type ◽  
Common Phenomenon ◽  
Open Discussion ◽  
The Stability ◽  
Ring Nebulae

Conti: One of the main conclusions of the Wolf-Rayet symposium in Buenos Aires was that Wolf-Rayet stars are evolutionary products of massive objects. Some questions:–Do hot helium-rich stars, that are not Wolf-Rayet stars, exist?–What about the stability of helium rich stars of large mass? We know a helium rich star of ∼40 MO. Has the stability something to do with the wind?–Ring nebulae and bubbles : this seems to be a much more common phenomenon than we thought of some years age.–What is the origin of the subtypes? This is important to find a possible matching of scenarios to subtypes.

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