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https://www.readbyqxmd.com/read/28226913/low-power-operation-of-a-barometric-pressure-sensor-for-use-in-an-automatic-fall-detector
#1
Wei Lu, Changhong Wang, Michael C Stevens, Stephen J Redmond, Nigel H Lovell, Wei Lu, Changhong Wang, Michael C Stevens, Stephen J Redmond, Nigel H Lovell, Changhong Wang, Nigel H Lovell, Wei Lu, Stephen J Redmond, Michael C Stevens
The use of a barometric pressure sensor in a wearable fall detector has been shown to improve the detection accuracy by determining the altitude change associated with the fall event. However, the barometer is a high-power-consuming sensor. This paper proposes a fall detection approach using a hermetically sealed and waterproof enclosure incorporating a small window covered by a semi-permeable membrane (SPM) to delay the equilibrium of internal and external pressures. This feature can be utilized to limit the time the barometer is powered but still capturing critical pressure information to discriminate fall and non-fall events...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28218420/plasma-lipoxin-a4-and-resolvin-d1-are-not-associated-with-reduced-adenoma-risk-in-a-randomized-trial-of-aspirin-to-prevent-colon-adenomas
#2
Veronika Fedirko, Gail McKeown-Eyssen, Charles N Serhan, Elizabeth L Barry, Robert S Sandler, Jane C Figueiredo, Dennis J Ahnen, Robert S Bresalier, Douglas J Robertson, Carlton W Anderson, John A Baron
Inflammation plays a major role in colon carcinogenesis. Endogenously produced specialized proresolving lipid mediators (SPMs) play a central role in inflammation and tissue homeostasis, and have been implicated in carcinogenesis. We studied the associations of plasma levels of two SPMs [lipoxin A4 (LXA4 ) and resolvin D1(RvD1)] with risk for recurrent adenoma. In this pilot study, we used data and biosamples from an adenoma chemoprevention study investigating the effects of aspirin and/or folic acid on the occurrence of colorectal adenomas...
February 20, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28217437/spontaneous-pneumomediastinum-in-a-healthy-young-female-a-case-report-and-literature-review
#3
Ahmed Dirweesh, Chikezie Alvarez, Muhammad Khan, Donald Christmas
Spontaneous pneumomediastinum (SPM) is an uncommon finding in young adults presenting usually without any comorbidities or an underlying pathology. It is most commonly due to alveolar rupture in the setting of an inciting event such an underlying asthma, barotrauma, valsalva maneuver, or esophageal rupture. Individuals can have varying presentations, from chest pain, dyspnea and dysphagia, to anxiety, weakness, or facial and neck swelling. The majority of patients have subcutaneous emphysema on examination and can have abnormal laboratory findings such as an elevated C-reactive proteins and leukocytosis...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28208062/nano-suspension-coating-as-a-technique-to-modulate-the-drug-release-from-controlled-porosity-osmotic-pumps-for-a-soluble-agent
#4
Leila Azharshekoufeh Bahari, Yousef Javadzadeh, Mohammad Barzegar Jalali, Peyvand Johari, Ali Nokhodchi, Javad Shokri
In controlled porosity osmotic pumps (CPOP), usually finding a single solvent with a capability to dissolve both film former (hydrophobic) and pore former (hydrophilic) is extremely challenging. Therefore, the aim of the present investigation was to tackle the issue associated with controlled porosity osmotic pump (CPOP) system using nano-suspension coating method. In the present study 4-Amino pyridine was used as a highly water soluble drug. In this method, a hydrophilic pore former (sucrose or mannitol) in nano range was suspended in polymeric coating solution using ball-mill...
February 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28198888/mitigating-nonlinear-propagation-impairments-of-ultrashort-pulses-by-fractional-temporal-self-imaging
#5
Mohamed Seghilani, Reza Maram, José Azaña
We present a new approach to mitigate nonlinear impairments-mainly induced by self-phase modulation (SPM)-of high-repetition-rate optical pulses propagating through fiber-optic devices (amplifiers, propagation lines, etc.). The proposed approach is based on pulse division before nonlinear propagation, followed by pulse recombination using fractional temporal self-imaging (also known as the Talbot effect) in a dispersive medium. This approach directly addresses practical limitations of previous mitigation methods when applied to a train of pulses with a high repetition rate, in the gigahertz range and above...
February 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28194869/the-effect-of-brushing-and-aging-on-the-staining-and-smoothness-of-resin-composites
#6
Lisandra R Mozzaquatro, Camila S Rodrigues, Marina R Kaizer, Maristela Lago, André Mallmann, Letícia B Jacques
OBJECTIVES: To evaluate the staining and smoothness of resin composites undergoing aging in water or red wine and simulated brushing with or without dentifrice. METHODS: The resin composites (Z250 microfilled and Z350XT nanofilled) were tested according to aging media (deionized water or red wine) and surface treatment (no brushing, brushed with water, or brushed with dentifrice). Specimens (n = 10) were subjected to three aging cycles (5 days) of continuous immersion in the aging media; each followed by simulated brushing (585 strokes)...
February 13, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28194630/source-based-morphometry-multivariate-approach-to-analyze-123-i-fp-cit-spect-imaging
#7
Enrico Premi, V D Calhoun, V Garibotto, R Turrone, A Alberici, E Cottini, A Pilotto, S Gazzina, M Magoni, B Paghera, B Borroni, A Padovani
PURPOSE: [(123)I]FP-CIT (DaTSCAN®) single-photon emission computed tomography (SPECT) imaging is widely used to study neurodegenerative parkinsonism, by measuring presynaptic dopamine transporter (DAT) in striatal regions. Beyond DAT, [(123)I]FP-CIT may be considered for other monoaminergic systems, in particular the serotonin transporter (SERT). Independent component analysis (ICA) implemented in source-based morphometry (SBM) could represent an alternative method to explore monoaminergic pathways, studying the relationship among voxels and grouping them into "neurotransmission" networks...
February 13, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28194434/corticosteroids-inhibit-anti-ige-activities-of-specialized-proresolving-mediators-on-b-cells-from-asthma-patients
#8
Nina Kim, Thomas H Thatcher, Patricia J Sime, Richard P Phipps
Specialized proresolving mediators (SPMs) promote the resolution of inflammation and exert beneficial effects in animal models of chronic inflammatory diseases, including asthma. Previously, we have shown that certain SPMs reduce IgE production in B cells from healthy individuals, which has a critical role in allergic asthma. Here, we investigated the effects of SPMs on B cell IgE production in asthma patients. Peripheral blood mononuclear cells from asthma patients were treated with 17-HDHA or RvD1, and IgE levels were measured...
February 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28187969/seasonal-changes-of-polycyclic-aromatic-hydrocarbons-in-response-to-hydrology-and-anthropogenic-activities-in-the-pearl-river-estuary-china
#9
Feng Liu, Lixia Niu, Hui Chen, Ping Li, Feng Tian, Qingshu Yang
The behaviours of PAHs (containing 2-6 aromatic rings) in the Pearl River estuary were examined each month in 2011. This study was designed to investigate the abundance of 16 priority PAHs and their response to the seasonal dynamics of anthropogenic activities and hydrological cycles. Monthly mean concentrations of ∑16PAHs in water and suspended particulate matter (SPM) were 88.31ng/L and 252.31ng/L respectively, with higher concentrations in the wet season (April to September). Heavy precipitation in the wet season resulted in relatively increased PAH input via riverine discharges and atmospheric deposition...
February 7, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28171851/utility-of-gray-matter-segmentation-of-ictal-interictal-perfusion-spect-and-interictal-18-f-fdg-pet-in-medically-refractory-epilepsy
#10
Kathryn C Elkins, Valeria M Moncayo, Hyunmi Kim, Larry D Olson
PURPOSE: We present a method of gray-matter segmentation of functional neuroimaging for localization of seizure onset zone (SOZ) in epilepsy surgery. (18)F-FDG-PET hypometabolism and ictal SPECT hyperperfusion may correspond to SOZ. We hypothesize that limiting functional images to gray matter improves identification of small, subtle, or obscure cortical volumes of (18)F-FDG-PET hypometabolism and eliminates hyperperfused seizure propagation pathways within white matter in ictal perfusion SPECT...
January 30, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28171781/increased-white-matter-radial-diffusivity-is-associated-with-prefrontal-cortical-folding-deficits-in-schizophrenia
#11
C Christoph Schultz, Gerd Wagner, Claudia Schachtzabel, Jürgen R Reichenbach, Ralf G M Schlösser, Heinrich Sauer, Kathrin Koch
The neuronal underpinnings of cortical folding alterations in schizophrenia remain unclear. Theories on the physiological development of cortical folds stress the importance of white matter fibers for this process and disturbances of fiber tracts might be relevant for cortical folding alterations in schizophrenia. Nine-teen patients with schizophrenia and 19 healthy subjects underwent T1-weighted MRI and DTI. Cortical folding was computed using a surface based approach. DTI was analyzed using FSL and SPM 5...
February 4, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28168980/characterisation-of-the-dynamics-of-organic-contaminants-n-alkanes-pahs-and-pcbs-in-a-coastal-area
#12
Agung Dhamar Syakti, Benjamin Oursel, Cedric Garnier, Pierre Doumenq
The dynamics of three classes of organic contaminants, namely n-alkanes, polycyclic aromatic hydrocarbons and polychlorinated biphenyls, were evaluated from the settled suspended particulate matter (SPM) of two wastewater treatment plant outlets (O1 and O2) at the Marseille coast. We used a 1-m-high Plexiglas settling column filled with 7L of seawater to determine the particles' settling rates, size distribution, and the extent of organic contaminants. Six classes of SPM (50-200μm particles size) were obtained from 15 fractions of 500-mL successive filtering samples ranging from 30s to 5days, including those in the tube wall...
February 3, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28157958/full-quadrature-regeneration-of-qpsk-signals-using-sequential-phase-sensitive-amplification-and-parametric-saturation
#13
K R H Bottrill, G Hesketh, L Jones, F Parmigiani, D J Richardson, P Petropoulos
We demonstrate all-optical regeneration of both the phase and the amplitude of a 10 GBaud quadrature phase shift keying (QPSK) signal using two nonlinear stages. First we regenerate the phase using a wavelength converting phase sensitive amplifier and then we regenerate the amplitude using a saturated single-pump parametric amplifier, returning the signal to its original wavelength at the same time. We exploit the conjugating nature of the two processing stages to eliminate the intrinsic SPM distortion of the system, further improving performance...
January 23, 2017: Optics Express
https://www.readbyqxmd.com/read/28157607/temporal-occurrence-and-sources-of-persistent-organic-pollutants-in-suspended-particulate-matter-from-the-most-heavily-polluted-river-mouth-of-lake-chaohu-china
#14
Cheng Liu, Lei Zhang, Chengxin Fan, Fuliu Xu, Kaining Chen, Xiaozhi Gu
The Nanfei River is by many measures the most heavily polluted tributary to Lake Chaohu. In this study, the temporal occurrence and sources of four classes of persistent organic pollutants (POPs), including polycyclic aromatic hydrocarbons (PAHs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs), in suspended particulate matter (SPM) from the river mouth were investigated monthly during 2014. Results show that concentrations of all four POPs in SPM were higher than those in the sediment of Lake Chaohu...
January 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28149968/7t-guided-learning-framework-for-improving-the-segmentation-of-3t-mr-images
#15
Khosro Bahrami, Islem Rekik, Feng Shi, Yaozong Gao, Dinggang Shen
The emerging era of ultra-high-field MRI using 7T MRI scanners dramatically improved sensitivity, image resolution, and tissue contrast when compared to 3T MRI scanners in examining various anatomical structures. The advantages of these high-resolution MR images include higher segmentation accuracy of MRI brain tissues. However, currently, accessibility to 7T MRI scanners remains much more limited than 3T MRI scanners due to technological and economical constraints. Hence, we propose in this work the first learning-based model that improves the segmentation of an input 3T MR image with any conventional segmentation method, through the reconstruction of a higher-quality 7T-like MR image, without actually acquiring an ultra-high-field 7T MRI...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28146505/high-efficiency-supercontinuum-generation-in-solid-thin-plates-at-0-1%C3%A2-%C3%A2-tw-level
#16
Peng He, Yangyang Liu, Kun Zhao, Hao Teng, Xinkui He, Pei Huang, Hangdong Huang, Shiyang Zhong, Yujiao Jiang, Shaobo Fang, Xun Hou, Zhiyi Wei
Supercontinuum generation in a solid-state medium was investigated experimentally. A continuum covering 460 to 950 nm was obtained when 0.8 mJ/30 fs Ti:sapphire laser pulses were applied to seven thin fused silica plates at a 1 kHz repetition rate. The primary processes responsible for spectral broadening were self-phase modulation (SPM) and self-steepening, while SPM and self-focusing were balanced to optimize the spectral broadening and suppress the multiphoton process. The output was compressed to a 5.4 fs and a 0...
February 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28140708/second-primary-malignancies-in-patients-treated-for-gastric-mucosa-associated-lymphoid-tissue-lymphoma
#17
Aurelien Amiot, Valerie Jooste, Charlotte Gagniere, Michaël Lévy, Christiane Copie-Bergman, Jehan Dupuis, Yann Le Baleur, Karim Belhadj, Iradj Sobhani, Corinne Haioun, Anne-Marie Bouvier, Jean-Charles Delchier
To assess the risk of second primary malignancy (SPM) in patients with gastric mucosa-associated lymphoid tissue (MALT) Lymphoma (GML), we included 175 patients with GML in the present study. The incidence of SPM in the general population, used for reference, was determined from the French network of cancer registries. During the 1442.9 patient-years of follow-up, 29 patients were diagnosed with incident SPM, including five patients diagnosed with gastric cancer (20.1/1000 patient-years). An increased incidence of SPM was observed in patients with GML (standardized incidence ratios [SIR]: 1...
January 31, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28139233/a-bottom-water-sampler-for-determining-chemical-gradients-across-the-water-sediment-interface
#18
Kit Yee Chong, Hao Liu, Kedong Yin, Paul J Harrison, Kwok Kei Kau
We developed an inexpensive bottom water sampler that can be operated from a small boat in order to obtain high resolution vertical profiles of dissolved oxygen (DO), chlorophyll, suspended particulate matter (SPM). These vertical profiles allow us to examine bottom resuspension processes and to estimate their benthic fluxes of nutrients across the sediment-water interface in shallow coastal waters. The sampler consists of a 2m long thick-walled transparent tube with 26 sampling ports at 8-10cm intervals. Each sampling interval contains a minimum of 300-370ml water samples...
January 27, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28131236/regional-volumetric-change-in-parkinson-s-disease-with-cognitive-decline
#19
Myrlene Gee, Juergen Dukart, Bogdan Draganski, W R Wayne Martin, Derek Emery, Richard Camicioli
BACKGROUND: Parkinson's disease (PD), characterized by motor dysfunction and cognitive decline, may demonstrate specific patterns of brain atrophy. Although cross-sectional magnetic resonance imaging (MRI) studies show correlation between regional brain volume loss and cognitive impairment, there is only scarce evidence from longitudinal studies validating the link between cognition and brain anatomy in PD. OBJECTIVE: To test the relationship between magnitude and spatial extent of atrophy in PD patients with progressive, significant cognitive decline and dementia (PDD)...
February 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28125152/spontaneous-pneumomediastinum-experience-in-18-patients-during-the-last-12-years
#20
Patrícia Dionísio, Luís Martins, Susana Moreira, Alda Manique, Rita Macedo, Fátima Caeiro, Luísa Boal, Cristina Bárbara
Objective: To characterize clinically all of the patients with spontaneous pneumomediastinum (SPM) admitted to an adult pulmonology ward in Lisbon, Portugal. Methods: This was a retrospective descriptive study of all adult patients (≥ 18 years of age) diagnosed with SPM between January of 2004 and September of 2015. Results: At least one predisposing factor was identified in most (88.9%) of the 18 patients who presented with SPM during the study period...
January 23, 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
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