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https://www.readbyqxmd.com/read/28326760/microscopic-evaluation-of-electrical-and-thermal-conduction-in-random-metal-wire-networks
#1
Ritu Gupta, Ankush Kumar, Sridhar Sadasivam, Sunil Walia, Giridhar U Kulkarni, Timothy S Fisher, Amy M Marconnet
Ideally, transparent heaters exhibit uniform temperature, fast response time, high achievable temperatures, low operating voltage, stability across a range of temperatures, and high optical transmittance. For metal network heaters, unlike for uniform thin film heaters, all of these parameters are directly or indirectly related to the network geometry.In the past, at equilibrium, the temperature distributions within metal networks have primarily been studied using either a physical temperature probe or direct infrared thermography, but there are limits to the spatial resolution of these cameras and probes and thus only average regional temperatures have typically been measured...
March 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28306552/precise-determination-of-the-heat-delivery-during-in-vivo-magnetic-nanoparticle-hyperthermia-with-infrared-thermography
#2
Harley Rodrigues, Gustavo Capistrano, Francyelli Mello, Nicholas Zufelato, Elisangela Silveira-Lacerda, Andris F Bakuzis
Monitoring noninvasively and in real-time the heat delivery during magnetic nanoparticle hyperthermia is of fundamental importance to predict clinical outcome for cancer treatment. Infrared thermography (IRT) can inform the surface temperature due to three-dimensional heat delivery inside a subcutaneous tumor, an argument that is supported by numerical simulations. However, for precise temperature determination, it is of crucial relevance to use a correct experimental configuration. This work reports a magnetic nanoparticle hyperthermia study (MNH) using a sarcoma 180 murine tumor containing 3...
March 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28303621/distal-skin-vasodilation-promotes-rapid-sleep-onset-in-preterm-neonates
#3
Lucile Barcat, Pauline Decima, Emilie Bodin, Stephane Delanaud, Erwan Stephan-Blanchard, Andre Leke, Jean-Pierre Libert, Pierre Tourneux, Veronique Bach
Although sleep is of paramount importance for preterm neonates, care of the latter in a neonatal intensive care unit does not favour sleep. Given that several studies in adults have described a 'vegetative preparedness to sleep' (in which distal skin vasodilation before lights-out promotes rapid sleep onset), we looked at whether or not this process operates in preterm neonates. Sleep propensity was assessed in terms of the duration of a spontaneous episode of wakefulness (W). Skin temperatures at six body sites (the abdomen, pectoral region, eye, hand, thigh and foot) were measured (using infrared thermography) during nocturnal polysomnography in 29 9-day-old preterm neonates (postmenstrual age: 209 ± 9 days)...
March 17, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28280584/skin-temperature-changes-in-wild-chimpanzees-upon-hearing-vocalizations-of-conspecifics
#4
Guillaume Dezecache, Klaus Zuberbühler, Marina Davila-Ross, Christoph D Dahl
A growing trend of research using infrared thermography (IRT) has shown that changes in skin temperature, associated with activity of the autonomic nervous system, can be reliably detected in human and non-human animals. A contact-free method, IRT provides the opportunity to uncover emotional states in free-ranging animals during social interactions. Here, we measured nose and ear temperatures of wild chimpanzees of Budongo Forest, Uganda, when exposed to naturally occurring vocalizations of conspecifics. We found a significant temperature decrease over the nose after exposure to conspecifics' vocalizations, whereas we found a corresponding increase for ear temperature...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28273793/supportive-noninvasive-tool-for-the-diagnosis-of-breast-cancer-using-a-thermographic-camera-as-sensor
#5
Marco Antonio Garduño-Ramón, Sofia Giovanna Vega-Mancilla, Luis Alberto Morales-Henández, Roque Alfredo Osornio-Rios
Breast cancer is the leading disease in incidence and mortality among women in developing countries. The opportune diagnosis of this disease strengthens the survival index. Mammography application is limited by age and periodicity. Temperature is a physical magnitude that can be measured by using multiple sensing techniques. IR (infrared) thermography using commercial cameras is gaining relevance in industrial and medical applications because it is a non-invasive and non-intrusive technology. Asymmetrical temperature in certain human body zones is associated with cancer...
March 3, 2017: Sensors
https://www.readbyqxmd.com/read/28268587/generation-of-3d-thermal-models-for-dentistry-applications
#6
Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba
There are a variety of medical imaging modalities available, although each modality focus into different aspects, for example: anatomical, physiological or geometrical information. This paper presents a new imaging modality (3D THERMO-SCAN) that combines anatomical computer tomography (CT) imaging slices, together with 2D infrared thermography images and 3D scanned shaped models of the area under study. Therefore, it is presented the 3D reconstructions involving a case study of a volunteer with bruxism. Some characteristics of bruxism are the hyperactivity of the chewing muscles, which changes the dynamics of microcirculation, also changing the correspondent skin's temperature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268583/multisensor-data-fusion-for-enhanced-respiratory-rate-estimation-in-thermal-videos
#7
Carina B Pereira, Xinchi Yu, Vladimir Blazek, Boudewijn Venema, Steffen Leonhardt
Scientific studies have demonstrated that an atypical respiratory rate (RR) is frequently one of the earliest and major indicators of physiological distress. However, it is also described in the literature as "the neglected vital parameter", mainly due to shortcomings of clinical available monitoring techniques, which require attachment of sensors to the patient's body. The current paper introduces a novel approach that uses multisensor data fusion for an enhanced RR estimation in thermal videos. It considers not only the temperature variation around nostrils and mouth, but the upward and downward movement of both shoulders...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268507/thermal-analysis-of-multiple-antenna-excited-breast-model-for-breast-cancer-detection
#8
Yinan Li, Babak Fahimi
Infrared thermography (IRT), or thermal imaging has long been proposed as a novel method in early detection of breast cancer. Most of the work done was through the detection of abnormal hotspot, or asymmetries in a thermal texture map. However, the surface temperature may not appear symmetric even for a healthy breast because of variations in blood supply and individual differences. In this paper, a method that is independent of the aforementioned symmetry is proposed. The breast under detection is initially excited by a group of patch antennas...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28259410/the-use-of-infrared-thermography-and-accelerometers-for-remote-monitoring-of-dairy-cow-health-and-welfare
#9
M Stewart, M T Wilson, A L Schaefer, F Huddart, M A Sutherland
Increasing reliance on automated systems on-farm has led to a need for remote monitoring of health and welfare. We aimed to validate 2 methods that could be integrated into automated systems currently in use: infrared thermography (IRT) to measure respiration rate (RR), and accelerometers to measure the flinch, step, kick (FSK) response and assessing stress and discomfort. We monitored 22 multiparous, nonlactating, Friesian and Friesian × Jersey cows (average 5.1 yr of age) during a baseline period (2 min), a restraint in a crush (2 min), and then a recovery period after exposure to a startle (2 min)...
March 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28248195/the-comparisons-between-thermography-and-ultrasonography-with-physical-examination-for-wrist-joint-assessment-in-juvenile-idiopathic-arthritis
#10
Butsabong Lerkvaleekul, Suphaneewan Jaovisidha, Witaya Sungkarat, Niyata Chitrapazt, Praman Fuangfa, Thumanoon Ruangchaijatuporn, Soamarat Vilaiyuk
This study aimed to assess infrared thermography (IRT) and ultrasonography (US) for detecting wrist arthritis in juvenile idiopathic arthritis (JIA) patients. Although IRT could help us detecting joint inflammation, IRT studies in JIA patients with wrist arthritis are still limited. Currently, no validated US criteria exist for detecting arthritis, and the most useful parameters between Gray-scale ultrasound (GSUS) or Power Doppler ultrasound (PDUS) remain unclear. Therefore, this study focused on detecting wrist arthritis in varying degrees using IRT and US compared with physical examination...
March 1, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28226765/generation-of-3d-thermal-models-for-dentistry-applications
#11
Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Mauren Abreu de Souza, Andriy Guilherme Krefer, Gustavo Benvenutti Borba, Gustavo J Vizinoni E Silva, Ana Paula G O Franco, Humberto Remigio Gamba, Gustavo Benvenutti Borba, Andriy Guilherme Krefer, Ana Paula G O Franco, Mauren Abreu de Souza, Humberto Remigio Gamba, Gustavo J Vizinoni E Silva
There are a variety of medical imaging modalities available, although each modality focus into different aspects, for example: anatomical, physiological or geometrical information. This paper presents a new imaging modality (3D THERMO-SCAN) that combines anatomical computer tomography (CT) imaging slices, together with 2D infrared thermography images and 3D scanned shaped models of the area under study. Therefore, it is presented the 3D reconstructions involving a case study of a volunteer with bruxism. Some characteristics of bruxism are the hyperactivity of the chewing muscles, which changes the dynamics of microcirculation, also changing the correspondent skin's temperature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226761/multisensor-data-fusion-for-enhanced-respiratory-rate-estimation-in-thermal-videos
#12
Carina B Pereira, Xinchi Yu, Vladimir Blazek, Boudewijn Venema, Steffen Leonhardt, Carina B Pereira, Xinchi Yu, Vladimir Blazek, Boudewijn Venema, Steffen Leonhardt, Xinchi Yu, Vladimir Blazek, Carina B Pereira, Boudewijn Venema, Steffen Leonhardt
Scientific studies have demonstrated that an atypical respiratory rate (RR) is frequently one of the earliest and major indicators of physiological distress. However, it is also described in the literature as "the neglected vital parameter", mainly due to shortcomings of clinical available monitoring techniques, which require attachment of sensors to the patient's body. The current paper introduces a novel approach that uses multisensor data fusion for an enhanced RR estimation in thermal videos. It considers not only the temperature variation around nostrils and mouth, but the upward and downward movement of both shoulders...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226681/thermal-analysis-of-multiple-antenna-excited-breast-model-for-breast-cancer-detection
#13
Yinan Li, Babak Fahimi, Yinan Li, Babak Fahimi, Babak Fahimi, Yinan Li
Infrared thermography (IRT), or thermal imaging has long been proposed as a novel method in early detection of breast cancer. Most of the work done was through the detection of abnormal hotspot, or asymmetries in a thermal texture map. However, the surface temperature may not appear symmetric even for a healthy breast because of variations in blood supply and individual differences. In this paper, a method that is independent of the aforementioned symmetry is proposed. The breast under detection is initially excited by a group of patch antennas...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28210555/breast-reconstruction-with-absorbable-mesh-sling-dynamic-infrared-thermography-of-skin-envelope
#14
Yoko Hashimoto, Naoki Watanabe, Takeshi Yuasa, Yoshinori Suzuki, Hiroshi Saisho
BACKGROUND: To immediate reconstruct ptosis breasts, we used polyglactin (Vicryl; Ethicon Inc., Somerville, NJ, USA) mesh as an inferolateral sling. However, Vicryl mesh is absorbable and losing function as a supporting structure. We doubt about the stability of the blood supply to the inferior part of the flap when it is in direct contact with inner implant. In this study, we examine the complications and the safety of the skin flap of this absorbable mesh sling (AMS) procedure. METHODS: The outcomes of 80 cases were examined, and the 1-year safety record of 40 cases was assessed...
February 2017: Gland Surgery
https://www.readbyqxmd.com/read/28207315/diagnosis-of-lumbosacral-diskospondylosis-in-a-bucking-bull-assisted-by-high-definition-thermal-and-nuclear-scintigraphic-imaging
#15
Marc Caldwell, Thomas Passler, Ram C Purohit, David Pascoe, Dwight F Wolfe
CASE DESCRIPTION An 8-year-old Brahman-cross bull was evaluated for left hind limb lameness of 2 months' duration. The lameness was first noticed during a rodeo bucking performance, immediately after the bull appeared to land inappropriately on the affected limb. CLINICAL FINDINGS Physical examination findings revealed left hind limb lameness, ataxia, and left-sided epaxial muscle atrophy. Palpation per rectum along the lumbar portion of the vertebral column revealed evidence of exostosis of the ventral aspect...
March 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28198742/a-reliability-study-using-a-long-wave-infrared-thermography-device-to-identify-relative-tissue-temperature-variations-of-the-body-surface-and-underlying-tissue
#16
Diane K Langemo, James G Spahn
OBJECTIVE: This study assesses the ability of the Scout (WoundVision LLC, Indianapolis, Indiana), an FDA-approved visual and thermal imaging device and software analysis tool, to provide clinicians with a reliable and reproducible way to incorporate long-wave infrared thermography and relative temperature differential into clinical wound assessment by consistently identifying control areas against which to measure wound temperature. METHODS: This laboratory-based study utilized 3 adult wound care professionals experienced in control area selection...
March 2017: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/28158005/design-and-fabrication-of-si-hdpe-hybrid-fresnel-lenses-for-infrared-imaging-systems
#17
Ahmad Rosli Abdul Manaf, Tsunetoshi Sugiyama, Jiwang Yan
In this work, novel hybrid Fresnel lenses for infrared (IR) optical applications were designed and fabricated. The Fresnel structures were replicated from an ultraprecision diamond-turned aluminum mold to an extremely thin layer (tens of microns) of high-density polyethylene polymer, which was directly bonded onto a flat single-crystal silicon wafer by press molding without using adhesives. Night mode imaging results showed that the fabricated lenses were able to visualize objects in dark fields with acceptable image quality...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28155011/photobiomodulation-laser-and-pulsed-electrical-field-increase-the-viability-of-the-musculocutaneous-flap-in-diabetic-rats
#18
Gabriella de Paula Marcondes Ferreira Leite, Lais Mara Siqueira das Neves, Carlos Alberto Silva, Rinaldo Roberto de Jesus Guirro, Thamires Rodrigues de Souza, Ana Karina de Souza, Sérgio Britto Garcia, Elaine Caldeira de Oliveira Guirro
The purpose of this study is to investigate the effect of pulsed electrical field (PEF) and photobiomodulation laser (PBM) on the viability of the TRAM flap in diabetic rats. Fifty Wistar rats were divided into five homogeneous groups: Group 1-control; Group 2-diabetics; Group 3-diabetics + PEF; Group 4-diabetic + laser 660 nm, 10 J/cm(2), 0.27 J; Group 5-diabetic + laser 660 nm, 140 J/cm(2), 3.9 J. The percentage of necrotic area was evaluated using software Image J®. The peripheral circulation of the flap was evaluated by infrared thermography FLIR T450sc (FLIR® Systems-Oregon USA)...
April 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28144561/graphene-polymer-coating-for-the-realization-of-strain-sensors
#19
Carmela Bonavolontà, Carla Aramo, Massimo Valentino, Giampiero Pepe, Sergio De Nicola, Gianfranco Carotenuto, Angela Longo, Mariano Palomba, Simone Boccardi, Carosena Meola
In this work we present a novel route to produce a graphene-based film on a polymer substrate. A transparent graphite colloidal suspension was applied to a slat of poly(methyl methacrylate) (PMMA). The good adhesion to the PMMA surface, combined with the shear stress, allows a uniform and continuous spreading of the graphite nanocrystals, resulting in a very uniform graphene multilayer coating on the substrate surface. The fabrication process is simple and yields thin coatings characterized by high optical transparency and large electrical piezoresitivity...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28139738/ionic-thermoelectric-gating-organic-transistors
#20
Dan Zhao, Simone Fabiano, Magnus Berggren, Xavier Crispin
Temperature is one of the most important environmental stimuli to record and amplify. While traditional thermoelectric materials are attractive for temperature/heat flow sensing applications, their sensitivity is limited by their low Seebeck coefficient (∼100 μV K(-1)). Here we take advantage of the large ionic thermoelectric Seebeck coefficient found in polymer electrolytes (∼10,000 μV K(-1)) to introduce the concept of ionic thermoelectric gating a low-voltage organic transistor. The temperature sensing amplification of such ionic thermoelectric-gated devices is thousands of times superior to that of a single thermoelectric leg in traditional thermopiles...
January 31, 2017: Nature Communications
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