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https://www.readbyqxmd.com/read/28413651/high-radiofrequency-radiation-at-stockholm-old-town-an-exposimeter-study-including-the-royal-castle-supreme-court-three-major-squares-and-the-swedish-parliament
#1
Lennart Hardell, Michael Carlberg, Tarmo Koppel, Lena Hedendahl
Exposure to radiofrequency (RF) radiation was classified as a possible human carcinogen, Group 2B, by the International Agency for Research on Cancer at WHO in 2011. The exposure pattern is changing due to the rapid development of technology. Outdoor RF radiation level was measured during five tours in Stockholm Old Town in April, 2016 using the EME Spy 200 exposimeter with 20 predefined frequencies. The results were based on 10,437 samples in total. The mean level of the total RF radiation was 4,293 µW/m(2) (0...
April 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28412455/effects-of-rf-pulse-profile-and-intra-voxel-phase-dispersion-on-mr-fingerprinting-with-balanced-ssfp-readout
#2
Su-Chin Chiu, Te-Ming Lin, Jyh-Miin Lin, Hsiao-Wen Chung, Cheng-Wen Ko, Martin Büchert, Michael Bock
PURPOSE: To investigate possible errors in T1 and T2 quantification via MR fingerprinting with balanced steady-state free precession readout in the presence of intra-voxel phase dispersion and RF pulse profile imperfections, using computer simulations based on Bloch equations. MATERIALS AND METHODS: A pulse sequence with TR changing in a Perlin noise pattern and a nearly sinusoidal pattern of flip angle following an initial 180-degree inversion pulse was employed...
April 13, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28408910/new-hypervariable-ssr-markers-for-diversity-analysis-hybrid-purity-testing-and-trait-mapping-in-pigeonpea-cajanus-cajan-l-millspaugh
#3
Abhishek Bohra, Rintu Jha, Gaurav Pandey, Prakash G Patil, Rachit K Saxena, Indra P Singh, D Singh, R K Mishra, Ankita Mishra, F Singh, Rajeev K Varshney, N P Singh
Draft genome sequence in pigeonpea offers unprecedented opportunities for genomics assisted crop improvement via enabling access to genome-wide genetic markers. In the present study, 421 hypervariable simple sequence repeat (SSR) markers from the pigeonpea genome were screened on a panel of eight pigeonpea genotypes yielding marker validation and polymorphism percentages of 95.24 and 54.11%, respectively. The SSR marker assay uncovered a total of 570 alleles with three as an average number of alleles per marker...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28404520/nothing-more-than-a-pair-of-curvatures-a-common-mechanism-for-the-detection-of-both-radial-and-non-radial-frequency-patterns
#4
Gunnar Schmidtmann, Frederick A A Kingdom
Radial frequency (RF) patterns, which are sinusoidal modulations of a radius in polar coordinates, are commonly used to study shape perception. Previous studies have argued that the detection of RF patterns is either achieved globally by a specialized global shape mechanism, or locally using as cue the maximum tangent orientation difference between the RF pattern and the circle. Here we challenge both ideas and suggest instead a model that accounts not only for the detection of RF patterns but also for line frequency patterns (LF), i...
April 12, 2017: Vision Research
https://www.readbyqxmd.com/read/28394080/parallel-transmit-capability-of-various-rf-transmit-elements-and-arrays-at-7t-mri
#5
Stefan H G Rietsch, Stephan Orzada, Andreas K Bitz, Marcel Gratz, Mark E Ladd, Harald H Quick
PURPOSE: In this work, 22 configurations for remote radiofrequency (RF) coil arrays consisting of different transmit element designs for 7 Tesla (T) ultrahigh-field MRI are compared by numerical simulations. METHODS: Investigated transmit RF element types are rectangular loops, micro striplines, micro striplines with meanders, 250-mm shielded dipoles with meanders, and lambda over two dipoles with and without shield. These elements are combined in four different configurations of circumferential RF body arrays with four or eight transmit elements each...
April 10, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28383482/identification-of-mobile-phones-using-the-built-in-magnetometers-stimulated-by-motion-patterns
#6
Gianmarco Baldini, Franc Dimc, Roman Kamnik, Gary Steri, Raimondo Giuliani, Claudio Gentile
We investigate the identification of mobile phones through their built-in magnetometers. These electronic components have started to be widely deployed in mass market phones in recent years, and they can be exploited to uniquely identify mobile phones due their physical differences, which appear in the digital output generated by them. This is similar to approaches reported in the literature for other components of the mobile phone, including the digital camera, the microphones or their RF transmission components...
April 6, 2017: Sensors
https://www.readbyqxmd.com/read/28377319/development-of-extended-voyaging-anti-oxidant-linked-amphiphilic-polymeric-nanomicelles-for-anti-tuberculosis-drug-delivery
#7
Rajendran Amarnath Praphakar, Murugan A Munusamy, Mariappan Rajan
Amphiphilic chitosan-graft-poly(caprolactone)/(ferulic acid) (CS-g-PCL/FA) multi-co-polymers were fabricated by microwave-assisted ring opening polymerization followed by an 1-ethyl-3-(3-dimethyl-aminopropyl) carbodiimide (EDC)-mediated coupling reaction and characterized by Fourier transformed infrared (FTIR) spectroscopy. Graft copolymers self-assembled into nanomicelles, and were able to incorporate rifampicin (RF) into their hydrophobic inner cores. X-ray diffraction (XRD) patterns were applied to characterize the crystal structures of graft polymers and the effects of RF on micelle morphology...
April 2, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28376281/differentiation-of-fat-poor-angiomyolipoma-from-clear-cell-renal-cell-carcinoma-in-contrast-enhanced-mdct-images-using-quantitative-feature-classification
#8
Han Sang Lee, Helen Hong, Dae Chul Jung, Seunghyun Park, Junmo Kim
PURPOSE: To develop a computer-aided classification system to differentiate benign fat-poor angiomyolipoma (fp-AML) from malignant clear-cell renal cell carcinoma (ccRCC) using quantitative feature classification on histogram and texture patterns from contrast-enhanced multi-detector computer tomography (CE MDCT) images. METHODS: A dataset including 50 CE MDCT images of 25 fp-AML and 25 ccRCC patients was used. From these images, the tumors were manually segmented by an expert radiologist to define the regions of interest (ROI)...
April 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28370375/radiofrequency-heating-studies-on-anesthetized-swine-using-fractionated-dipole-antennas-at-10-5-t
#9
Yiğitcan Eryaman, Russell L Lagore, M Arcan Ertürk, Lynn Utecht, Patrick Zhang, Angel Torrado-Carvajal, Esra Abaci Türk, Lance DelaBarre, Gregory J Metzger, Gregor Adriany, Kâmil Uğurbil, J Thomas Vaughan
PURPOSE: To validate electromagnetic and thermal simulations with in vivo temperature measurements, and to demonstrate a framework that can be used to predict temperature increase caused by radiofrequency (RF) excitation with dipole transmitter arrays. METHODS: Dipole arrays were used to deliver RF energy in the back/neck region of the swine using different RF excitation patterns (n = 2-4 per swine) for heating. The temperature in anesthetized swine (n = 3) was measured using fluoroscopic probes (n = 12) and compared against thermal modeling from animal-specific electromagnetic simulations...
March 31, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28353206/assessing-spatio-temporal-trend-of-vector-breeding-and-dengue-fever-incidence-in-association-with-meteorological-conditions
#10
Afifa Malik, Abdullah Yasar, Amtul Bari Tabinda, Ihsan Elahi Zaheer, Khalida Malik, Adeeba Batool, Yusra Mahfooz
Th aim of this study is to investigate spatio-temporal trends of dengue vector breeding and epidemic (disease incidence) influenced by climatic factors. The spatio-temporal (low-, medium-, and high-intensity periods) evaluation of entomological and epidemiological investigations along with climatic factors like rainfall (RF), temperature (Tmax), relative humidity (RH), and larval indexing was conducted to develop correlations in the area of Lahore, Pakistan. The vector abundance and disease transmission trend was geo-tagged for spatial insight...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28349768/effect-of-body-weight-support-variation-on-muscle-activities-during-robot-assisted-gait-a-dynamic-simulation-study
#11
Shahid Hussain, Prashant K Jamwal, Mergen H Ghayesh
BACKGROUND AND OBJECTIVES: While body weight support (BWS) intonation is vital during conventional gait training of neurologically challenged subjects, it is important to evaluate its effect during robot assisted gait training. In the present research we have studied the effect of BWS intonation on muscle activities during robotic gait training using dynamic simulations. METHODS: Two dimensional (2-D) musculoskeletal model of human gait was developed conjointly with another 2-D model of a robotic orthosis capable of actuating hip, knee and ankle joints simultaneously...
May 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28337820/selective-radiofrequency-stimulation-of-the-dorsal-root-ganglion-drg-as-a-method-for-predicting-targets-for-neuromodulation-in-patients-with-post-amputation-pain-a-case-series
#12
Corey W Hunter, Ajax Yang, Tim Davis
OBJECTIVE: While spinal cord stimulation (SCS) has established itself as an accepted and validated treatment for neuropathic pain, there are a number of conditions where it has experienced less, long-term success: post amputee pain (PAP) being one of them. Dorsal root ganglion (DRG) stimulation has shown great promise, particularly in conditions where traditional SCS has fallen short. One major difference between DRG stimulation and traditional SCS is the ability to provide focal stimulation over targeted areas...
March 23, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28336896/nanofibrous-silver-coated-polymeric-scaffolds-with-tunable-electrical-properties
#13
Adnan Memic, Musab Aldhahri, Ali Tamayol, Pooria Mostafalu, Mohamed Shaaban Abdel-Wahab, Mohamadmahdi Samandari, Kamyar Mollazadeh Moghaddam, Nasim Annabi, Sidi A Bencherif, Ali Khademhosseini
Electrospun micro- and nanofibrous poly(glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) substrates have been extensively used as scaffolds for engineered tissues due to their desirable mechanical properties and their tunable degradability. In this study, we fabricated micro/nanofibrous scaffolds from a PGS-PCL composite using a standard electrospinning approach and then coated them with silver (Ag) using a custom radio frequency (RF) sputtering method. The Ag coating formed an electrically conductive layer around the fibers and decreased the pore size...
March 13, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28335216/investigation-of-the-structural-electrical-and-optical-properties-of-the-nano-scale-gzo-thin-films-on-glass-and-flexible-polyimide-substrates
#14
Fang-Hsing Wang, Kun-Neng Chen, Chao-Ming Hsu, Min-Chu Liu, Cheng-Fu Yang
In this study, Ga₂O₃-doped ZnO (GZO) thin films were deposited on glass and flexible polyimide (PI) substrates at room temperature (300 K), 373 K, and 473 K by the radio frequency (RF) magnetron sputtering method. After finding the deposition rate, all the GZO thin films with a nano-scale thickness of about 150 ± 10 nm were controlled by the deposition time. X-ray diffraction patterns indicated that the GZO thin films were not amorphous and all exhibited the (002) peak, and field emission scanning electron microscopy showed that only nano-scale particles were observed...
May 10, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28316588/alterations-of-muscle-activation-pattern-in-stroke-survivors-during-obstacle-crossing
#15
Chenming Ma, Na Chen, Yurong Mao, Dongfeng Huang, Rong Song, Le Li
OBJECTIVE: This study investigates changes in the neuromuscular activation pattern of the lower limb muscles in stroke survivors when crossing obstacles of three different heights. METHODS: Eight stroke survivors and eight age-, height-, and gender-matched healthy controls were recruited and instructed to cross over obstacles with heights of 10, 20, and 30% leg length. Surface electromyography (EMG) signals were recorded from the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA), and medial gastrocnemius (MG) of both limbs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28262893/new-frontiers-for-mass-spectrometry-based-upon-structures-for-lossless-ion-manipulations
#16
Yehia M Ibrahim, Ahmed M Hamid, Liulin Deng, Sandilya V B Garimella, Ian K Webb, Erin S Baker, Richard D Smith
Structures for lossless ion manipulations (SLIM) provide a new paradigm for efficient, complex and extended gas phase ion manipulations. SLIM are created from electric fields generated by the application of DC and RF potentials to arrays of electrodes patterned on two parallel surfaces. The electric fields provide lossless ion manipulations, including effective ion transport and storage. SLIM modules have been developed using both constant and oscillatory electric fields (e.g. traveling waves) to affect the ion motion...
March 27, 2017: Analyst
https://www.readbyqxmd.com/read/28258971/an-image-processing-strategy-to-extract-important-information-suitable-for-a-low-size-stimulus-pattern-in-a-retinal-prosthesis
#17
Yili Chen, Jixiang Fu, Dawei Chu, Rongmao Li, Yaoqin Xie
BACKGROUND: A retinal prosthesis is designed to help the blind to obtain some sight. It consists of an external part and an internal part. The external part is made up of a camera, an image processor and an RF transmitter. The internal part is made up of an RF receiver, implant chip and microelectrode. METHODS: Currently, the number of microelectrodes is in the hundreds, and we do not know the mechanism for using an electrode to stimulate the optic nerve. A simple hypothesis is that the pixels in an image correspond to the electrode...
March 4, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28256158/treatment-outcomes-and-patterns-of-radiologic-appearance-after-hypofractionated-image-guided-radiotherapy-delivered-with-helical-tomotherapy-hht-for-lung-tumours
#18
Stefano Arcangeli, Lorenzo Falcinelli, Stefano Bracci, Alessandro Greco, Alessia Monaco, Jessica Dognini, Cinzia Chiostrini, Rita Bellavita, Cynthia Aristei, Vittorio Donato
OBJECTIVE: To evaluate treatment outcomes and patterns of CT lung injury after hypofractionated image-guided radiotherapy delivered with helical tomotherapy (HHT) in a series of inoperable lung lesions. METHODS: 68 patients who were medically inoperable (69 lesions) without evidence of viable extrathoracic disease were included. Dose prescription was driven by tumour location (hilar/pericentral vs peripheral) and/or target volume. 52% of the lesions received a biological equivalent dose (BED10) ≥100 Gy...
March 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28255335/the-clinical-characteristics-of-sarcoid-arthropathy-based-on-a-prospective-cohort-study
#19
Senol Kobak, Fidan Sever, Ozan Usluer, Tuncay Goksel, Mehmet Orman
BACKGROUND: Sarcoidosis is known as a Th1-mediated disease, which can mimic many primary rheumatologic diseases or sometimes co-exist with them. Clinical characteristics of sarcoid arthropathy are not well described and the studies reported in the literature so far are mostly based on data from referrals. The aim of this study was to evaluate the incidence and clinical characteristics of sarcoid arthropathy. METHODS: All our patients were prospectively evaluated in our rheumatology outpatient center from 2011 to 2015...
December 2016: Therapeutic Advances in Musculoskeletal Disease
https://www.readbyqxmd.com/read/28223989/ufgt-the-key-enzyme-associated-with-the-petals-variegation-in-japanese-apricot
#20
Xinxin Wu, Qinghua Gong, Xiaopeng Ni, Yong Zhou, Zhihong Gao
Japanese apricot (Prunus mume Sieb.et Zucc.) is an important ornamental plant in China. One of the traits of petals color variegation is attractive, but its formation mechanism is unclear. In our study, RNA-seq technology was employed to characterize the transcriptome response to the mutation of "Fuban Tiaozhi" associated with petals variegation in Japanese apricot. As a result, 4,579,040 (white-flowered, WF) and 7,269,883 (red-flowered, RF) reads were mapped to P. persica genes, while 5,006,676 (WF) and 7,907,436 (RF) were mapped to P...
2017: Frontiers in Plant Science
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