keyword
MENU ▼
Read by QxMD icon Read
search

NDE

keyword
https://www.readbyqxmd.com/read/28934616/a-model-based-bayesian-solution-for-characterization-of-complex-damage-scenarios-in-aerospace-composite-structures
#1
H Reed, Cara A C Leckey, A Dick, G Harvey, J Dobson
Ultrasonic damage detection and characterization is commonly used in nondestructive evaluation (NDE) of aerospace composite components. In recent years there has been an increased development of guided wave based methods. In real materials and structures, these dispersive waves result in complicated behavior in the presence of complex damage scenarios. Model-based characterization methods utilize accurate three dimensional finite element models (FEMs) of guided wave interaction with realistic damage scenarios to aid in defect identification and classification...
September 5, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28888152/altered-functional-connectivity-to-stressful-stimuli-in-prenatally-cocaine-exposed-adolescents
#2
Yasmin Zakiniaeiz, Sarah W Yip, Iris M Balodis, Cheryl M Lacadie, Dustin Scheinost, R Todd Constable, Linda C Mayes, Rajita Sinha, Marc N Potenza
BACKGROUND: Prenatal cocaine exposure (PCE) is linked to addiction and obesity vulnerability. Neural responses to stressful and appetitive cues in adolescents with PCE versus those without have been differentially linked to substance-use initiation. However, no prior studies have assessed cue-reactivity responses among PCE adolescents using a connectivity-based approach. METHODS: Twenty-two PCE and 22 non-prenatally drug-exposed (NDE) age-, sex-, IQ- and BMI-matched adolescents participated in individualized guided imagery with appetitive (favorite-food), stressful and neutral-relaxing cue scripts during functional magnetic resonance imaging...
August 19, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28773003/lamb-wave-damage-quantification-using-ga-based-ls-svm
#3
Fuqiang Sun, Ning Wang, Jingjing He, Xuefei Guan, Jinsong Yang
Lamb waves have been reported to be an efficient tool for non-destructive evaluations (NDE) for various application scenarios. However, accurate and reliable damage quantification using the Lamb wave method is still a practical challenge, due to the complex underlying mechanism of Lamb wave propagation and damage detection. This paper presents a Lamb wave damage quantification method using a least square support vector machine (LS-SVM) and a genetic algorithm (GA). Three damage sensitive features, namely, normalized amplitude, phase change, and correlation coefficient, were proposed to describe changes of Lamb wave characteristics caused by damage...
June 12, 2017: Materials
https://www.readbyqxmd.com/read/28772976/non-destructive-inspection-of-impact-damage-in-composite-aircraft-panels-by-ultrasonic-guided-waves-and-statistical-processing
#4
Margherita Capriotti, Hyungsuk E Kim, Francesco Lanza di Scalea, Hyonny Kim
This paper discusses a non-destructive evaluation (NDE) technique for the detection of damage in composite aircraft structures following high energy wide area blunt impact (HEWABI) from ground service equipment (GSE), such as heavy cargo loaders and other heavy equipment. The test structures typically include skin, co-cured stringers, and C-frames that are bolt-connected onto the skin with shear ties. The inspection exploits the waveguide geometry of these structures by utilizing ultrasonic guided waves and a line scan approach...
June 4, 2017: Materials
https://www.readbyqxmd.com/read/28772485/optimal-electrode-selection-for-electrical-resistance-tomography-in-carbon-fiber-reinforced-polymer-composites
#5
Luis Waldo Escalona Galvis, Paulina Diaz-Montiel, Satchi Venkataraman
Electrical Resistance Tomography (ERT) offers a non-destructive evaluation (NDE) technique that takes advantage of the inherent electrical properties in carbon fiber reinforced polymer (CFRP) composites for internal damage characterization. This paper investigates a method of optimum selection of sensing configurations for delamination detection in thick cross-ply laminates using ERT. Reduction in the number of sensing locations and measurements is necessary to minimize hardware and computational effort. The present work explores the use of an effective independence (EI) measure originally proposed for sensor location optimization in experimental vibration modal analysis...
February 4, 2017: Materials
https://www.readbyqxmd.com/read/28768532/estrogen-like-and-tissue-selective-effects-of-7-methoxycoumarin-from-ficus-umbellata-moraceae-an-in-vitro-and-in-vivo-study
#6
Stéphane Zingue, Thomas Michel, Chantal Beatrice Magne Nde, Amstrong Nang Njuh, Julia Cisilotto, Derek Tantoh Ndinteh, Colin Clyne, Xavier Fernandez, Tânia Beatriz Creczynski-Pasa, Dieudonné Njamen
BACKGROUND: Ficus umbellata is a medicinal plant previously shown to endow estrogenic properties. Its major component was isolated and characterized as 7-methoxycoumarin (MC). Noteworthy, coumarins and the respective active metabolite 7-hydroxycoumarin analogs have shown aromatase inhibitory activity, which is of particular interest in the treatment of estrogen-dependent cancers. The present work aimed at evaluating the estrogenic/antiestrogenic effects of MC in vitro and in vivo. METHODS: To do so, in vitro assays using E-screen and reporter gene were done...
August 2, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28715329/phased-array-imaging-of-complex-geometry-composite-components
#7
Alex J Brath, Francesco Simonetti, Francesco Simonetti
Progress in computational fluid dynamics (CFD) and the availability of new composite materials are driving major advances in the design of aerospace engine components which now have highly complex geometries optimized to maximize system performance. However, shape complexity poses significant challenges to traditional non-destructive evaluation (NDE) methods whose sensitivity and selectivity rapidly decrease as surface curvature increases. Additionally, new aerospace materials typically exhibit an intricate microstructure that further complicates the inspection...
July 13, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28693813/intensity-and-memory-characteristics-of-near-death-experiences
#8
Charlotte Martial, Vanessa Charland-Verville, Héléna Cassol, Vincent Didone, Martial Van Der Linden, Steven Laureys
Memories of Near-Death Experiences (NDEs) seem to be very detailed and stable over time. At present, there is still no satisfactory explanation for the NDEs' rich phenomenology. Here we compared phenomenological characteristics of NDE memories with the reported experience's intensity. We included 152 individuals with a self-reported "classical" NDE (i.e. occurring in life-threatening conditions). All participants completed a mailed questionnaire that included a measure of phenomenological characteristics of memories (the Memory Characteristics Questionnaire; MCQ) and a measure of NDE's intensity (the Greyson NDE scale)...
July 7, 2017: Consciousness and Cognition
https://www.readbyqxmd.com/read/28692534/blood-neuron-derived-exosomes-as-biomarkers-of-cognitive-impairment-in-hiv
#9
Bing Sun, Pranjali Dalvi, Linda Abadjian, Norina Tang, Lynn Pulliam
OBJECTIVE: To investigate proteins associated with neuronal damage in plasma neuron-derived exosomes (NDE) of HIV-infected study participants as a liquid biomarker for cognitive impairment. METHODS: Plasma NDE were isolated using precipitation and immunoadsorption with antibody to a cell surface-specific neuronal marker. Total exosomes and NDE were enumerated, characterized, and proteins extracted and targets quantified by ELISA. RESULTS: Plasma NDE from 23 HIV seropositive individuals of which 11 had mild cognitive impairment, and 12 HIV seronegative controls of which three had cognitive impairment were isolated...
September 10, 2017: AIDS
https://www.readbyqxmd.com/read/28669110/near-death-experiences-in-a-multi-religious-hospital-population-in-sri-lanka
#10
Miyuru Chandradasa, Chamara Wijesinghe, K A L A Kuruppuarachchi, Mahendra Perera
Near-death experiences (NDEs) are a wide range of experiences that occur in association with impending death. There are no published studies on NDEs in general hospital populations, and studies have been mainly conducted on critically ill patients. We assessed the prevalence of NDEs and its associations in a multi-religious population in a general hospital in Sri Lanka. A randomised sample of patients admitted to the Colombo North Teaching Hospital was assessed using the Greyson NDE scale and clinical assessment...
July 1, 2017: Journal of Religion and Health
https://www.readbyqxmd.com/read/28659779/temporality-of-features-in-near-death-experience-narratives
#11
Charlotte Martial, Héléna Cassol, Georgios Antonopoulos, Thomas Charlier, Julien Heros, Anne-Françoise Donneau, Vanessa Charland-Verville, Steven Laureys
Background: After an occurrence of a Near-Death Experience (NDE), Near-Death Experiencers (NDErs) usually report extremely rich and detailed narratives. Phenomenologically, a NDE can be described as a set of distinguishable features. Some authors have proposed regular patterns of NDEs, however, the actual temporality sequence of NDE core features remains a little explored area. Objectives: The aim of the present study was to investigate the frequency distribution of these features (globally and according to the position of features in narratives) as well as the most frequently reported temporality sequences of features...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28656323/mediation-of-the-effect-of-childhood-socioeconomic-position-by-educational-attainment-on-adult-chronic-disease-in-chile
#12
Patricia Frenz, Jay S Kaufman, Carolina Nazzal, Gabriel Cavada, Francisco Cerecera, Nicolás Silva
OBJECTIVES: We estimated the roles of childhood socioeconomic position (ChSEP) and education attainment on chronic diseases in Chilean adults, mediated through structural determinants and health behaviors, to identify potential pro-equity interventions. METHODS: We analyzed Chile's longitudinal Social Protection Surveys, a national sample of 14,788 adults with follow-up to 2009. Controlled direct effects (CDE) and natural effects (NDE and NIE) of ChSEP and education on number of chronic diseases were estimated with negative binomial models...
June 27, 2017: International Journal of Public Health
https://www.readbyqxmd.com/read/28644964/determination-of-absolute-material-nonlinearity-with-air-coupled-ultrasonic-receivers
#13
David Torello, Nicholas Selby, Jin-Yeon Kim, Jianmin Qu, Laurence J Jacobs
Quantitative evaluation of the microstructural state of a specimen can be deduced from knowledge of the sample's absolute acoustic nonlinearity parameter, β, making the measurement of β a powerful tool in the NDE toolbox. However, the various methods used in the past to measure β each suffer from significant limitations. Piezoelectric contact transducers are sensitive to nonlinear signals, cheap, and simple to use, but they are hindered by the variability of the interfacial contact between transducer and specimen surface...
November 2017: Ultrasonics
https://www.readbyqxmd.com/read/28525195/-acute-colonic-diverticulitis-outcome-according-to-general-practice-management-prior-to-referral-and-criteria-predictive-of-complications-a-10-year-experience-in-a-university-hospital
#14
P Youatou, W Ngatchou, G Yondou, F Nde, P Mols, A S Ramadan, M Ngassa
INTRODUCTION: Ambulatory treatment of acute uncomplicated diverticulitis has been shown to be safe and effective by several recent studies. The aim of our study was to analyze the outcome of general practice management concerning the complications, the treatment modalities and the hospitalization duration during the first episode of acute diverticulitis. MATERIEL AND METHODS: A total of 176 medical files of patient presenting between January 2000 and December 2010 at the emergency department with a first episode of acute diverticulitis confirmed by an abdominal CT scan were analyzed...
2017: Revue Médicale de Bruxelles
https://www.readbyqxmd.com/read/28390234/metallic-iron-for-safe-drinking-water-provision-considering-a-lost-knowledge
#15
REVIEW
Hezron T Mwakabona, Arnaud Igor Ndé-Tchoupé, Karoli N Njau, Chicgoua Noubactep, Kerstin D Wydra
Around year 1890, the technology of using metallic iron (Fe(0)) for safe drinking water provision was already established in Europe. The science and technology to manufacture suitable Fe(0) materials were known and further developed in this period. Scientists had then developed skills to (i) explore the suitability of individual Fe(0) materials (e.g. iron filling, sponge iron) for selected applications, and (ii) establish treatment processes for households and water treatment plants. The recent (1990) discovery of Fe(0) as reactive agent for environmental remediation and water treatment has not yet considered this ancient knowledge...
June 15, 2017: Water Research
https://www.readbyqxmd.com/read/28388964/breast-and-pleuropulmonary-metastasis-of-multirecurrent-scalp-dermatofibrosarcoma-protuberans-a-case-report
#16
N-A Ouédraogo Nde, N A Ouédraogo, H A Bambara, B M A Tiemtoré-Kambou, F Traoré, N Zongo, M S Ouédraogo, G P Tapsoba, Achach Thouraya Chtioui, A Lamien/Sanou
BACKGROUND: Dermatofibrosarcoma protuberans is a rare tumor, representing about 0.1% of skin malignant tumors. It is characterized by local aggressiveness with significant potential for recurrence. Although metastasis is rare, it does occur. We report a case of a Burkinabe woman with dermatofibrosarcoma protuberans. CASE PRESENTATION: A 27-year-old Burkinabe woman consulted our institution for a recurrent scalp nodule that had been evolving for 13 years. At clinical examination, she was in good condition with a dry cough...
April 8, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28372132/ultrasonic-attenuation-and-phase-velocity-of-high-density-polyethylene-pipe-material
#17
J S Egerton, M J S Lowe, P Huthwaite, H V Halai
Knowledge of acoustic properties is crucial for ultrasonic or sonic imaging and signal detection in nondestructive evaluation (NDE), medical imaging, and seismology. Accurately and reliably obtaining these is particularly challenging for the NDE of high-density polyethylene (HDPE), such as is used in many water or gas pipes, because the properties vary greatly with frequency, temperature, direction and spatial location. Therefore the work reported here was undertaken in order to establish a basis for such a multiparameter description...
March 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28346076/meaning-making-after-a-near-death-experience-the-relevance-of-intrapsychic-and-interpersonal-dynamics
#18
Simone Bianco, Marco Sambin, Arianna Palmieri
This study aims to investigate the processes used by individuals to integrate a near-death experience (NDE) and to discuss the use of a meaning-making component to help people who have had such experiences. A psychotherapist interviewed six individuals who reported having had a NDE. Transcripts of the interviews were coded using an interpretative phenomenological analysis. The authors identified intrapsychic and interpersonal dynamics implicated in the individuals' meaning-making processes, and the problems encountered during their integration of the experience...
March 27, 2017: Death Studies
https://www.readbyqxmd.com/read/28316064/depression-among-hiv-aids-patients-on-highly-active-antiretroviral-therapy-in-the-southwest-regional-hospitals-of-cameroon-a-cross-sectional-study
#19
Pleasure Atoh Ngum, Peter Nde Fon, Roland Cheofor Ngu, Vincent Siysi Verla, Henri Namme Luma
INTRODUCTION: HIV patients are now having longer life expectancies with the use of antiretroviral therapy (ART). However, the issue of mental illness has surfaced with depression being the most common in these patients, which has markedly reduced patient adherence to ART. In Cameroon, the management of HIV/AIDS does not incorporate psychiatric manifestations and depression is therefore underdiagnosed. The aim of our study was to determine the prevalence and determinants of depressive symptoms and their association with adherence to ART among HIV/AIDS patients on HAART in the Southwest Regional Hospitals of Cameroon...
June 2017: Neurology and Therapy
https://www.readbyqxmd.com/read/28303355/false-memory-susceptibility-in-coma-survivors-with-and-without-a-near-death-experience
#20
Charlotte Martial, Vanessa Charland-Verville, Hedwige Dehon, Steven Laureys
It has been postulated that memories of near-death experiences (NDEs) could be (at least in part) reconstructions based on experiencers' (NDErs) previous knowledge and could be built as a result of the individual's attempt to interpret the confusing experience. From the point of view of the experiencer, NDE memories are perceived as being unrivalled memories due to its associated rich phenomenology. However, the scientific literature devoted to the cognitive functioning of NDErs in general, and their memory performance in particular, is rather limited...
March 16, 2017: Psychological Research
keyword
keyword
10848
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"