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Morad Chughtai, Nicholas Piuzzi, George Yakubek, Anton Khlopas, Nipun Sodhi, Assem A Sultan, Salahuddin Nasir, Benjamin S T Yates, Anil Bhave, Michael A Mont
Patients suffering from quadriceps muscle weakness secondary to osteoarthritis or after surgeries, such as total knee arthroplasty, appear to benefit from the use of neuromuscular electrical stimulation (NMES), which can improve muscle strength and function, range of motion, exercise capacity, and quality of life. Several modalities exist that deliver this therapy. However, with the ever-increasing demand to improve clinical efficiency and costs, digitalize healthcare, optimize data collection, improve care coordination, and increase patient compliance and engagement, newer devices incorporating technologies that facilitate these demands are emerging...
October 12, 2017: Surgical Technology International
Xiaoyu Zhou, Xinwei Liu, Wenbo Cao, Xiao Wang, Ming Li, Haoxue Qiao, Zheng Ouyang
Gaussian distribution has been utilized to describe the global number density distribution of ion cloud in the Paul trap, which is known as the thermal equilibrium theory and widely used in theoretical modeling of ion clouds in the ion traps. Using ion trajectory simulations, however, the ion clouds can now also be treated as a dynamic ion flow field and the location-dependent features could now be characterized. This study was carried out to better understand the in-trap ion cloud properties, such as the local particle velocity and temperature...
October 17, 2017: Journal of the American Society for Mass Spectrometry
Belén Hernández, Fernando Pflüger, Manuel Dauchez, Mahmoud Ghomi
Water interaction with peptide chains is one of the key structure stabilizing factors in an aqueous environment. Because of its strong polar character, water can bind to both anionic and cationic sites via electrostatic interactions. It can also act as a hydrogen-bond donor or acceptor according to its interactions with different polar groups in the backbone and side chains of peptides and proteins. Based on density functional theory calculations, the present report aims at illustrating the most energetically favorable interaction sites of aromatic side chains of phenylalanine, tyrosine, tryptophan, and histidine (neutral and protonated species) with surrounding water molecules...
October 18, 2017: Physical Chemistry Chemical Physics: PCCP
Alberto Cappellaro, Tommaso Macrì, Giovanni F Bertacco, Luca Salasnich
Laser induced transitions between internal states of atoms have been playing a fundamental role to manipulate atomic clouds for many decades. In absence of interactions each atom behaves independently and their coherent quantum dynamics is described by the Rabi model. Since the experimental observation of Bose condensation in dilute gases, static and dynamical properties of multicomponent quantum gases have been extensively investigated. Moreover, at very low temperatures quantum fluctuations crucially affect the equation of state of many-body systems...
October 17, 2017: Scientific Reports
Daniel Hui Loong Ng, Ruimin Li, Srivatsan V Raghavan, Shie-Yui Liong
Atmospheric aerosols influence precipitation by changing the earth's energy budget and cloud properties. A number of studies have reported correlations between aerosol properties and precipitation data. Despite previous research, it is still hard to quantify the overall effects that aerosols have on precipitation as multiple influencing factors such as relative humidity (RH) can distort the observed relationship between aerosols and precipitation. Thus, in this study, both satellite-retrieved and reanalysis data were used to investigate the relationship between aerosols and precipitation in the Southeast Asia region from 2001 to 2015, with RH considered as a possible influencing factor...
October 17, 2017: Scientific Reports
Yusong Zhang, Weikang Chen, Zhe Lin, Sheng Li, Thomas F George
For a conjugated polymer irradiated by two optical pulses, the whole process of excitation, involving lattice oscillations, oscillations of the energy level structure, and evolution of the electron cloud, is investigated. Localization of the electron cloud appears in the first 100 fs of irradiation, which in turn induces vibrations of lattice of the polymer chain as well as oscillations of the band gap. These oscillations filter the absorption of the external optical field inversely and convert the original optical field to an ultrafast light field whose intensity varies with a certain period...
August 21, 2017: Optics Express
Florian Willomitzer, Gerd Häusler
We discuss physical and information theoretical limits of optical 3D metrology. Based on these principal considerations we introduce a novel single-shot 3D movie camera that almost reaches these limits. The camera is designed for the 3D acquisition of macroscopic live scenes. Like a hologram, each movie-frame encompasses the full 3D information about the object surface and the observation perspective can be varied while watching the 3D movie. The camera combines single-shot ability with a point cloud density close to the theoretical limit...
September 18, 2017: Optics Express
Alexander Konoshonkin, Anatoli Borovoi, Natalia Kustova, Jens Reichardt
The backscattering Mueller matrix for the typical shapes of ice crystals of cirrus (hexagonal columns and plates, bullets and droxtals) in the case of their random orientations has been approximately presented as the power functions of the crystal size from 10 µm to 1000 µm. The coefficients of the power functions have been found. Four commonly used backscatter ratios used in lidar research (depolarization, lidar, color and backscatter-to-IWC ratios) have been calculated for the first time as the functions of the modal crystal size at the conventional lidar wavelengths of 0...
September 18, 2017: Optics Express
Jiawei Zhang, Yuefeng Ji, Hao Yu, Xingang Huang, Han Li
The RAN architecture towards mobile 5G and beyond is undergoing a fundamental evolution, which brings optics into the radio world. Fronthaul is a new segment that leverages on the advantages of optical communication for RAN transport. However, the current fronthaul architecture shows a fixed connection between an RRH and a BBU, which leads to inefficient resource utilization. In this paper, we focus on the fronthaul flexibility that allows "any-RRH to any-BBU" connection. In particular, we consider a CoMP service and discuss how flexible optical fronthaul helps to improve its performance...
September 4, 2017: Optics Express
Giuseppe Zibordi, Marco Talone, Kenneth J Voss, B Carol Johnson
The spectral resolution requirements for in situ remote sensing reflectanceRRS measurements aiming at supporting satellite ocean color validation and System Vicarious Calibration (SVC) were investigated. The study, conducted using sample hyperspectral RRS from different water types, focused on the visible spectral bands of the ocean land color imager (OLCI) and of the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) satellite sensors. Allowing for a ±0.5% maximum difference between in situ and satellite derived RRS solely due to the spectral band characteristics of the in situ radiometer, a spectral resolution of 1 nm for SVC of PACE is needed in oligotrophic waters...
August 7, 2017: Optics Express
Philipp M M Groetsch, Peter Gege, Stefan G H Simis, Marieke A Eleveld, Steef W M Peters
A three-component reflectance model (3C) is applied to above-water radiometric measurements to derive remote-sensing reflectance Rrs (λ). 3C provides a spectrally resolved offset Δ(λ) to correct for residual sun and sky radiance (Rayleigh- and aerosol-scattered) reflections on the water surface that were not represented by sky radiance measurements. 3C is validated with a data set of matching above- and below-water radiometric measurements collected in the Baltic Sea, and compared against a scalar offset correction Δ...
August 7, 2017: Optics Express
Nan Chen, Wei Li, Tonomori Tanikawa, Masahiro Hori, Rigen Shimada, Teruo Aoki, Knut Stamnes
Accurate radiative transfer simulations of signals received by sensors deployed on satellite platforms for remote sensing purposes can be computationally demanding depending on channel width and the spectral variation of atmospheric and surface optical properties. Therefore, methods that can speed up such simulations are desirable. While it is common practice to use atmospheric "window" channels to minimize the influence of gaseous absorption, the impact of the underlying surface as well as clouds and aerosols has received less attention...
August 7, 2017: Optics Express
Sean Peisert, Eli Dart, William Barnett, Edward Balas, James Cuff, Robert L Grossman, Ari Berman, Anurag Shankar, Brian Tierney
Objective: We describe a detailed solution for maintaining high-capacity, data-intensive network flows (eg, 10, 40, 100 Gbps+) in a scientific, medical context while still adhering to security and privacy laws and regulations. Materials and Methods: High-end networking, packet-filter firewalls, network intrusion-detection systems. Results: We describe a "Medical Science DMZ" concept as an option for secure, high-volume transport of large, sensitive datasets between research institutions over national research networks, and give 3 detailed descriptions of implemented Medical Science DMZs...
October 6, 2017: Journal of the American Medical Informatics Association: JAMIA
Yuichi Kodama, Jun Mashima, Takehide Kosuge, Eli Kaminuma, Osamu Ogasawara, Kousaku Okubo, Yasukazu Nakamura, Toshihisa Takagi
The DNA Data Bank of Japan (DDBJ) Center ( has been providing public data services for 30 years since 1987. We are collecting nucleotide sequence data and associated biological information from researchers as a member of the International Nucleotide Sequence Database Collaboration (INSDC), in collaboration with the US National Center for Biotechnology Information and the European Bioinformatics Institute. The DDBJ Center also services the Japanese Genotype-phenotype Archive (JGA) with the National Bioscience Database Center to collect genotype and phenotype data of human individuals...
October 10, 2017: Nucleic Acids Research
Benjamin Brede, Alvaro Lau, Harm M Bartholomeus, Lammert Kooistra
In recent years, LIght Detection And Ranging (LiDAR) and especially Terrestrial Laser Scanning (TLS) systems have shown the potential to revolutionise forest structural characterisation by providing unprecedented 3D data. However, manned Airborne Laser Scanning (ALS) requires costly campaigns and produces relatively low point density, while TLS is labour intense and time demanding. Unmanned Aerial Vehicle (UAV)-borne laser scanning can be the way in between. In this study, we present first results and experiences with the RIEGL RiCOPTER with VUX ® -1UAV ALS system and compare it with the well tested RIEGL VZ-400 TLS system...
October 17, 2017: Sensors
Mihaela Crisan-Vida, Oana Sorina Lupse, Lacramioara Stoicu-Tivadar, Daniela Salvari, Radu Catanet, Elena Bernad
Cervical cancer is one of the most important causes of death in women in fertile age in Romania. In order to discover high-risk situations in the first stages of the disease it is important to enhance prevention actions, and ICT, respectively cloud computing and Big Data currently support such activities. The national screening program uses an information system that based on data from different medical units gives feedback related to the women healthcare status and provides statistics and reports. In order to ensure the continuity of care it is updated with HL7 CDA support and cloud computing...
2017: Studies in Health Technology and Informatics
Joshua A Driver, Konstantin O Nagornov, Anton N Kozhinov, Yury O Tsybin, Andriy Kharchenko, I Jonathan Amster
The current paradigm in FT-ICR cell design is to approximate the ideal three-dimensional quadratic trapping potential as closely as possible to maintain ion cloud spatial coherence and achieve long transients, either with hyperbolically shaped electrodes, shimming electrodes, or by dynamic harmonization. In sharp contrast, the FT-ICR analyzer cell with four narrow aperture detection electrodes (NADEL) introduces significant anharmonic terms to the trapping potential. This analyzer cell is capable of quadrupolar detection by which one can measure a signal that is close to the unperturbed cyclotron frequency...
October 16, 2017: Journal of the American Society for Mass Spectrometry
Ana Flávia de Oliveira E Silva, Whocely Victor de Castro, Frank Pereira de Andrade
The determination of iron in fortified foods is mandatory by many global regulatory agencies. However, the spectroscopic techniques require elevated investments limiting their applicability especially in developing countries. Therefore, simple, viable and analytical methods with sufficient sensitivity can become an alternative. In this work, a sensitive, simple and viable spectrophotometry method to determine iron in wheat and maize flours was developed following a cloud point extraction (CPE) procedure. The analyte was first complexed with 2-(5-Bromine-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) in the presence of the surfactant octylphenoxypolyethoxyethanol (Triton X-114)...
March 1, 2018: Food Chemistry
M Razu Ahmed, Khan Rubayet Rahaman, Aaron Kok, Quazi K Hassan
The northeastern region of Bangladesh often experiences flash flooding during the pre-harvesting period of the boro rice crop, which is the major cereal crop in the country. In this study, our objective was to delineate the impact of the 2017 flash flood (that initiated on 27 March 2017) on boro rice using multi-temporal Landsat-8 OLI and MODIS data. Initially, we opted to use Landsat-8 OLI data for mapping the damages; however, during and after the flooding event the acquisition of cloud free images were challenging...
October 14, 2017: Sensors
Monica Santamaria, Bruno Fosso, Flavio Licciulli, Bachir Balech, Ilaria Larini, Giorgio Grillo, Giorgio De Caro, Sabino Liuni, Graziano Pesole
A holistic understanding of environmental communities is the new challenge of metagenomics. Accordingly, the amplicon-based or metabarcoding approach, largely applied to investigate bacterial microbiomes, is moving to the eukaryotic world too. Indeed, the analysis of metabarcoding data may provide a comprehensive assessment of both bacterial and eukaryotic composition in a variety of environments, including human body. In this respect, whereas hypervariable regions of the 16S rRNA are the de facto standard barcode for bacteria, the Internal Transcribed Spacer 1 (ITS1) of ribosomal RNA gene cluster has shown a high potential in discriminating eukaryotes at deep taxonomic levels...
September 25, 2017: Nucleic Acids Research
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