Search results: Found 17

Listing 1 - 10 of 17 << page
of 2
>>
Sort by
Ultrafast Ultrasound Imaging

Authors: ---
ISBN: 9783038971276 9783038971283 Year: Pages: 184 DOI: 10.3390/books978-3-03897-128-3 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medical technology
Added to DOAB on : 2018-09-21 09:01:06
License:

Loading...
Export citation

Choose an application

Abstract

Among medical imaging modalities, such as computed tomography (CT) andmagnetic resonance imaging (MRI), ultrasound imaging stands out due to itstemporal resolution. Owing to the nature of medical ultrasound imaging, it has beenused for not only observation of the morphology of living organs but also functionalimaging, such as blood flow imaging and evaluation of the cardiac function. Ultrafastultrasound imaging, which has recently become widely available, significantlyincreases the opportunities for medical functional imaging. Ultrafast ultrasoundimaging typically enables imaging frame-rates of up to ten thousand frames persecond (fps). Due to the extremely high temporal resolution, this enablesvisualization of rapid dynamic responses of biological tissues, which cannot beobserved and analyzed by conventional ultrasound imaging. This Special Issueincludes various studies of improvements to the performance of ultrafast ultrasound

Fatigue crack detection on structural steel members by using ultrasound excited thermography = Erkennung von Ermüdungsrissen in Stahlbauteilen durch ultraschallangeregte Thermografie

Author:
Book Series: Berichte zum Stahl- und Leichtbau / Karlsruher Institut für Technologie, Versuchsanstalt für Stahl, Holz und Steine, Stahl- und Leichtbau ISSN: 21987912 ISBN: 9783731504177 Year: Volume: 3 Pages: XVI, 334 p. DOI: 10.5445/KSP/1000048191 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 19:59:17
License:

Loading...
Export citation

Choose an application

Abstract

Ultrasound excitation of structural steel members leads to localised energy dissipation at existent fatigue cracks and thus allows for thermographic flaw detection. Essential effects on the defect-selective heating, such as flaw size, plate thickness, crack mouth opening or static preload, are systematically investigated. Laser vibrometry measurements of the crack edges, theoretical modelling of frictional heating and numerical simulations contribute to the understanding of the involved physics.

Ultrasound Elastography

Author:
ISBN: 9783038979104 / 9783038979111 Year: Pages: 144 DOI: 10.3390/books978-3-03897-911-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medicine (General) --- Therapeutics
Added to DOAB on : 2019-08-28 11:21:27
License:

Loading...
Export citation

Choose an application

Abstract

The comparison between methods, evaluation of portal hypertension and many other questions are still open issues in liver elastography. New elastographic applications are under evaluation and close to being used in clinical practice. Strain imaging has been incorporated into many disciplines and EFSUMB guidelines are under preparation. More research is necessary for improved evidence for clinical applications in daily practice. The Special Issue published papers on recent advances in development and application of Ultrasound Elastography.

Ultrasound B-mode Imaging: Beamforming and Image Formation Techniques

Authors: --- ---
ISBN: 9783039211999 / 9783039212002 Year: Pages: 146 DOI: 10.3390/books978-3-03921-200-2 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:15
License:

Loading...
Export citation

Choose an application

Abstract

Ultrasound medical imaging stands out among the other diagnostic imaging modalities for its patient-friendliness, high temporal resolution, low cost, and absence of ionizing radiation. On the other hand, it may still suffer from limited detail level, low signal-to-noise ratio, and narrow field-of-view. In the last decade, new beamforming and image reconstruction techniques have emerged which aim at improving resolution, contrast, and clutter suppression, especially in difficult-to-image patients. Nevertheless, achieving a higher image quality is of the utmost importance in diagnostic ultrasound medical imaging, and further developments are still indispensable. From this point of view, a crucial role can be played by novel beamforming techniques as well as by non-conventional image formation techniques (e.g., advanced transmission strategies, and compounding, coded, and harmonic imaging). This Special Issue includes novel contributions on both ultrasound beamforming and image formation techniques, particularly addressed at improving B-mode image quality and related diagnostic content. This indeed represents a hot topic in the ultrasound imaging community, and further active research in this field is expected, where many challenges still persist.

In Vivo Imaging in Pharmacological Research

Authors: --- ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889452378 Year: Pages: 222 DOI: 10.3389/978-2-88945-237-8 Language: English
Publisher: Frontiers Media SA
Subject: Therapeutics --- Science (General)
Added to DOAB on : 2017-10-13 14:57:01
License:

Loading...
Export citation

Choose an application

Abstract

The discovery and development of a biological active molecule with therapeutic properties is an ever increasing complex task, highly unpredictable at the early stages and marked, in the end, by high rates of failure. As a consequence, the overall process leading to the production of a successful drug is very costly. The improvement of the net outcome in drug discovery and development would require, amongst other important factors, a good understanding of the molecular events that characterize the disease or pathology in order to better identify likely targets of interest, to optimize the interaction of an active agent (small molecule or macromolecule of natural or synthetic origin) with those targets, and to facilitate the study of the pharmacokinetics, pharmacodynamics and toxicity of an active agent in suitable models and in human subjects. The objective of this Research Topic is to highlight new developments and applications of imaging techniques with the objective of performing pharmacological studies in vivo, in animal models and in humans. In the domain of drug discovery, the pharmacological and biomedical questions constitute the center of attention. In this sense, it is fundamental to keep in mind the strengths and limitations of each analytical or imaging technique. At the end, the judicious application of the technique with the aim of supporting the search for answers to manifold questions arising during a long and painstaking path provides a continuous role for imaging within the complex area of drug discovery and development.

The Chemistry of Imaging Probes

Authors: ---
Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889455980 Year: Pages: 129 DOI: 10.3389/978-2-88945-598-0 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-01-23 14:53:43
License:

Loading...
Export citation

Choose an application

Abstract

Over the past decades, the field of molecular imaging has been rapidly growing involving multiple disciplines such as medicine, biology, chemistry, pharmacology and biomedical engineering. Any molecular imaging procedure requires an imaging probe that is an agent used to visualize, characterize and quantify biological processes in living systems. Such a probe typically consists of an agent that usually produces signal for imaging purpose, a targeting moiety, and a linker connecting the targeting moiety and the signaling agent.Many challenging problems of molecular imaging can be addressed by exploiting the great possibilities offered by modern synthetic organic and coordination chemistry and the powerful procedures provided by conjugation chemistry. Thus, chemistry plays a decisive role in the development of this cutting-edge methodology.Currently, the diagnostic imaging modalities include Magnetic Resonance Imaging (MRI), Computed Tomography (CT), Ultrasound (US), Nuclear Imaging (PET, SPECT), Optical Imaging (OI) and Photoacoustic Imaging (PAI). Each of these imaging modalities has its own advantages and disadvantages, and therefore, a multimodal approach combining two techniques is often adopted to generate complementary anatomical and functional information of the disease. The basis for designing imaging probes for a given application is dictated by the chosen imaging modality, which in turn is dependent upon the concentration and localization profile (vascular, extracellular matrix, cell membrane, intracellular, near or at the cell nucleus) of the target molecule. The development of high-affinity ligands and their conjugation to the targeting vector is also one of the key steps for pursuing efficient molecular imaging probes. Other excellent reviews, text and monographs describe the principles of biomedical imaging, focusing on molecular biology or on the physics behind the techniques. This Research Topic aims to show how chemistry can offer molecular imaging the opportunity to express all its potential.

Wine Aging Technologies

Authors: ---
ISBN: 9783038977483 Year: Pages: 120 DOI: 10.3390/books978-3-03897-749-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biology --- Science (General)
Added to DOAB on : 2019-04-05 10:34:31
License:

Loading...
Export citation

Choose an application

Abstract

Wine aging is a desirable and valuable process, commonly used to improve wine quality, and traditionally carried out in oak wooden casks. The correct use of oak barrels and the ever-increasing demand for barrels in the different production areas of the world has led to a constant search for technological alternatives to reproduce the chemical and physical processes undergone by wines during their stay in barrels.The aim of this Special Issue is to publish a compilation of original research and revision works that cover different aspects of the ageing processes of wine in casks and other alternative systems that reproduce, with different technologies, the transformations that take place in the barrel.Important aspects to be addressed are:the type of technological solutions that exist for wine agingthe impact of these new technologies on the final productcomparison of the effect of emerging and traditional technologies on the wine ageddifferentiation of wines undergoing different systems to avoid fraudcharacterization of the new materials used in barrel productionaccelerated aging of wines with wood and oxygen

Catalytic, Photocatalytic and Electrocatalytic Processes for the Valorisation of CO2

Authors: ---
ISBN: 9783039217786 / 9783039217793 Year: Pages: 132 DOI: 10.3390/books978-3-03921-779-3 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-12-09 11:49:16
License:

Loading...
Export citation

Choose an application

Abstract

Increasing attention is being paid to the development of effective technologies for the sequestration of CO2 and its storage. Hopefully, this will result in processes that can lead to its valorisation as a chemical, e.g., for the regeneration of fuels, but also for the production of intermediates. These are usually energy demands and rather slow processes, requiring energy input and catalysts. Some examples are the innovative strategies for the hydrogenation, photoconversion, or electroreduction of carbon dioxide. This book collects original research papers, reviews, and commentaries focused on the challenges related to the valorisation and conversion of CO2.

Non-destructive Testing of Materials in Civil Engineering

Author:
ISBN: 9783039216901 / 9783039216918 Year: Pages: 448 DOI: 10.3390/books978-3-03921-691-8 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:16
License:

Loading...
Export citation

Choose an application

Abstract

This book was proposed and organized as a means to present recent developments in the field of nondestructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of nondestructive testing of different materials in civil engineering—from building materials to building structures. The current trend in the development of nondestructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. From this point of view, interesting results with significance for building practices have been obtained

Keywords

non-destructive testing --- masonry structures --- strengthening --- ultrasonic tomography --- adhesion assessment --- autoclaved aerated concrete (AAC) --- compressive strength --- shape and size of specimen --- moisture of AAC --- ultrasonic testing --- gantry crane --- RMF technique --- civil engineering --- fibre-cement boards --- non-destructive testing --- acoustic emission --- degree of degradation --- thermovision --- active thermography --- thermal contrast --- defect detection --- location of inclusions --- non-destructive testing --- materials research --- building partition --- cement-based composites --- fiber cement boards --- durability --- ultrasound measurements --- spun concrete --- micro-computed tomography --- nanoindentation --- deconvolution --- mathematical morphology --- non-destructive evaluation --- structural damage --- natural frequency --- singular value truncation --- multiple feedbacks --- data noise --- NDT methods --- rebar location --- eddy-current method --- GPR method --- concrete --- concrete mix design --- concrete strength prediction --- data mining --- machine learning --- timber structures --- non-destructive methods --- ultrasonic wave --- stress wave --- drilling resistance --- X-ray micro-computed tomography --- waste brick dust --- adsorption --- lead --- cesium --- surface complexation --- precipitation --- solid-state NMR spectroscopy --- Lamb waves --- scanning laser vibrometry --- adhesive joints --- non-destructive testing --- damage detection --- excitation frequency --- nondestructive testing --- thermography --- monitoring of structures --- reinforced concrete chimney --- corrosion processes --- service life of a structure --- viscoelastic parameters --- creep test --- fatigue tests --- asphalt mixtures --- Burgers model --- four point bending beam --- pattern recognition --- acoustic emission --- Structural Health Monitoring --- brittle fracture --- diagnostics --- non-destructive testing --- reinforced concrete grandstand stadium --- vibration analysis --- crowd-induced excitation --- structural tuning --- concrete slabs and floorings --- horizontal casting --- compressive strength --- ultrasonic tests --- fibre-cement boards --- non-destructive testing --- acoustic emission --- artificial neural networks --- SEM --- non-destructive method --- damage --- mercury intrusion porosimetry --- X-ray computed tomography --- acoustic emission AE --- acoustic spectrum --- quasi brittle cement composites --- destruction process --- resistance measurement --- wood moisture sensing --- non-destructive testing --- moisture safety --- cellulose fibre cement boards --- microstructure --- nanoindentation --- SEM-EDS analysis --- temperature --- concrete elements --- concrete strength --- reinforced concrete tanks --- concrete corrosion --- sulphate corrosion --- ultrasound tests --- rebound hammer --- SilverSchmidt --- concrete --- compressive strength --- non-destructive testing --- non-destructive testing --- diagnostic --- acoustic methods --- ultrasound --- building materials --- defects

Breastfeeding and Human Lactation

Authors: ---
ISBN: 9783038979302 / 9783038979319 Year: Pages: 450 DOI: 10.3390/books978-3-03897-931-9 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Nutrition and Food Sciences
Added to DOAB on : 2019-06-26 08:44:06
License:

Loading...
Export citation

Choose an application

Abstract

Human lactation has evolved to produce a milk composition that is uniquely-designed for the human infant. Not only does human milk optimize infant growth and development, it also provides protection from infection and disease. More recently, the importance of human milk and breastfeeding in the programming of infant health has risen to the fore. Anchoring of infant feeding in the developmental origins of health and disease has led to a resurgence of research focused in this area. Milk composition is highly variable both between and within mothers. Indeed the distinct maternal human milk signature, including its own microbiome, is influenced by environmental factors, such as diet, health, body composition and geographic residence. An understanding of these changes will lead to unravelling the adaptation of milk to the environment and its impact on the infant. In terms of the promotion of breastfeeding, health economics and epidemiology is instrumental in shaping public health policy and identifying barriers to breastfeeding. Further, basic research is imperative in order to design evidence-based interventions to improve both breastfeeding duration and women’s breastfeeding experience.

Keywords

human milk --- breastfed infants --- body composition --- anthropometrics --- milk intake --- bioelectrical impedance spectroscopy --- ultrasound skinfolds --- maternal factors --- infant --- feeding --- preterm --- premature --- bottle --- human milk --- breastfeeding --- nipple shield --- infant feeding --- choline --- phosphocholine --- glycerophosphocholine --- lactation --- human milk --- infants --- adequate intake --- dietary recommendations --- Canada --- Cambodia --- breast milk --- galactogogues --- mothers of preterm infants --- breastfeeding --- attitudes --- knowledge --- midwifery --- formula supplementation --- justification of supplementation --- maternal wellbeing --- maternal distress --- post-partum distress --- breastfeeding support --- paternal role --- partner support --- infant --- Ireland --- passive immunity --- antibodies --- lactation --- peptidomics --- prematurity --- proteolysis --- breast milk --- preterm infant --- enteral nutrition --- lipids --- omega-3 fatty acids --- omega-6 fatty acids --- Docosahexaenoic acid --- Arachidonic acid --- long-chain polyunsaturated fatty acids --- pregnancy --- breast milk --- lactation --- maternal diet --- n-6 and n-3 polyunsaturated fatty acid --- docosahexaenoic acid --- zinc deficiency --- plasma zinc --- lactating women --- zinc supplementation --- Quito --- Ecuador --- Andean region --- GDM --- lactation --- thyroid --- triiodothyronine --- thyroxine --- thyroid antibodies --- breastfeeding --- knowledge --- practice --- barriers --- social support --- professional support --- raw breast milk --- cytomegalovirus --- milk-acquired infections --- preterm infant --- adipokines --- adiponectin --- leptin --- breastfeeding --- infant --- body composition --- bioelectrical impedance spectroscopy --- ultrasound skinfolds --- human milk --- lactation --- human lactation --- expressing --- milk synthesis --- fat synthesis --- human milk --- milk metabolites --- lactation --- milk metabolomics --- human milk --- breastfeeding --- lactation --- lipids --- lipidomics --- mass spectrometry --- chromatography --- NMR spectroscopy --- human milk --- sex-specificity --- infant growth --- early life nutrition --- postnatal outcomes --- breastfeeding --- breast milk --- human milk --- colostrum --- IgA --- HGF --- TGF-? --- growth factors --- geographical location --- human milk --- potassium --- sodium --- ICP-OES --- ion selective electrode --- lactoferrin --- human milk --- infection --- immunity --- antisecretory factor --- human milk --- breast milk --- breastfeeding --- inflammation --- lactoferrin --- candida --- human milk --- milk cells --- immune cells --- antimicrobial proteins --- human milk --- breastfeeding --- ethnicity --- composition --- diet --- responsive feeding --- breastfeeding --- breastmilk --- babywearing --- co-sleeping --- mother–infant interaction --- feeding cues --- maternal responsiveness --- mother–infant physical contact --- proximal care --- fatty acids --- long-chain polyunsaturated fatty acids --- endocannabinoids --- infant health --- breast milk --- casein --- whey --- protein --- breastfeeding --- infant --- body composition --- bioelectrical impedance spectroscopy --- ultrasound skinfolds --- human milk --- calculated daily intakes --- lactation --- human milk --- metabolites --- microbiome --- mode of delivery --- caesarean section --- proton nuclear magnetic resonance --- breastfeeding --- human milk composition --- body composition --- maternal diet --- infant growth --- appetite regulation --- N-acylethanolamines --- OEA --- SEA --- PEA --- breastfeeding --- human milk composition --- obesity --- Breastfeeding --- human lactation --- lactation --- human milk --- breast milk --- milk composition

Listing 1 - 10 of 17 << page
of 2
>>
Sort by
Narrow your search