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Alternative energy

Yu-Hsuan Lin, Chi-Te Wang, Feng-Chuan Lin, Li-Jen Liao, Wu-Chia Lo, Po-Wen Cheng
Importance: In-office angiolytic laser procedures have been used successfully as an alternative treatment for vocal fold polyps; little is known in detail about the treatment outcomes and adverse events. Objective: To examine the outcomes and incidence rates of adverse events associated with in-office angiolytic laser procedures with or without concurrent polypectomy as an alternative treatment for vocal fold polyps. Design, Setting, and Participants: Retrospective cohort study at a tertiary medical center...
January 18, 2018: JAMA Otolaryngology—Head & Neck Surgery
Adrian Zurbuchen, Andreas Haeberlin, Lukas Bereuter, Alois Pfenniger, Simon Bosshard, Micha Kernen, Paul Philipp Heinisch, Juerg Fuhrer, Rolf Vogel
OBJECTIVE: cardiac pacemakers require regular medical follow-ups to ensure proper functioning. However, device replacements due to battery depletion are common and account for ∼25% of all implantation procedures. Furthermore, conventional pacemakers require pacemaker leads which are prone to fractures, dislocations or isolation defects. The ensuing surgical interventions increase risks for the patients and costs that need to be avoided. METHODS: in this study, we present a method to harvest energy from endocardial heart motions...
February 2018: IEEE Transactions on Bio-medical Engineering
Dawei Du, Longyin Wen, Honggang Qi, Qingming Huang, Qi Tian, Siwei Lyu
To effectively solve the challenges in object tracking, such as large deformation and severe occlusion, many existing methods use graph-based models to capture target part relations, and adopt a sequential scheme of target part selection, part matching, and state estimation. However, such methods have two major drawbacks: 1) inaccurate part selection leads to performance deterioration of part matching and state estimation and 2) there are insufficient effective global constraints for local part selection and matching...
April 2018: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
M P Tooley, B Ersfeld, S R Yoffe, A Noble, E Brunetti, Z M Sheng, M R Islam, D A Jaroszynski
Self-injection in a laser-plasma wakefield accelerator is usually achieved by increasing the laser intensity until the threshold for injection is exceeded. Alternatively, the velocity of the bubble accelerating structure can be controlled using plasma density ramps, reducing the electron velocity required for injection. We present a model describing self-injection in the short-bunch regime for arbitrary changes in the plasma density. We derive the threshold condition for injection due to a plasma density gradient, which is confirmed using particle-in-cell simulations that demonstrate injection of subfemtosecond bunches...
July 28, 2017: Physical Review Letters
I-D Potirniche, A C Potter, M Schleier-Smith, A Vishwanath, N Y Yao
We propose and analyze two distinct routes toward realizing interacting symmetry-protected topological (SPT) phases via periodic driving. First, we demonstrate that a driven transverse-field Ising model can be used to engineer complex interactions which enable the emulation of an equilibrium SPT phase. This phase remains stable only within a parametric time scale controlled by the driving frequency, beyond which its topological features break down. To overcome this issue, we consider an alternate route based upon realizing an intrinsically Floquet SPT phase that does not have any equilibrium analog...
September 22, 2017: Physical Review Letters
Nikolay A Simakov, Maria G Kurnikova
The dependency of current-voltage characteristics of the α-hemolysin channel on the channel position within the membrane was studied using Poisson-Nernst-Planck theory of ion conductivity with soft repulsion between mobile ions and protein atoms (SP-PNP). The presence of the membrane environment also influences the protonation state of the residues at the boundary of the water-lipid interface. In this work, we predict that Asp and Lys residues at the protein rim change their protonation state upon penetration to the lipid environment...
January 16, 2018: Journal of Membrane Biology
A P Zakharov, L M Pismen
We describe reshaping of active textiles actuated by bending of Janus fibres comprising both active and passive components. A great variety of shapes, determined by minimising the overall energy of the fabric, can be produced by varying bending directions determined by the orientation of Janus fibres. Under certain conditions, alternative equilibrium states, one absolutely stable and the other metastable coexist, and their relative energy may flip its sign as system parameters, such as the extension upon actuation, change...
January 17, 2018: Soft Matter
Ronald D Hills
Coarse-grained (CG) models have been successful in simulating the chemical properties of lipid bilayers, but accurate treatment of membrane proteins and lipid-protein molecular interactions remains a challenge. The CgProt force field, original developed with the multiscale coarse graining method, is assessed by comparing the potentials of mean force for sidechain insertion in a DOPC bilayer to results reported for atomistic molecular dynamics simulations. Reassignment of select CG sidechain sites from the apolar to polar site type was found to improve the attractive interfacial behavior of tyrosine, phenylalanine and asparagine as well as charged lysine and arginine residues...
2018: PeerJ
Kelsey Gallagher, Annika Flint, Marialena Mouzaki, Andrea Carpenter, Beth Haliburton, Louise Bannister, Holly Norgrove, Lisa Hoffman, David Mack, Alain Stintzi, Margaret Marcon
BACKGROUND: Chronically ill children often require feeding via gastrostomy tubes (G-tubes). Commercial formula is most commonly used for enteral feeding; however, caregivers have been requesting blenderized tube feeds (BTFs) as an alternative. The objective of this study was to evaluate the feasibility of using BTFs in a medically complex pediatric population and assess their impact on clinical outcomes, as well as the microbiota. METHODS: Twenty pediatric participants were included...
January 16, 2018: JPEN. Journal of Parenteral and Enteral Nutrition
Haydar Taylan Turan, Oğuzhan Kucur, Birce Kahraman, Seyhan Salman, Viktorya Aviyente
80 different push-pull type organic chromophores which possess Donor-Acceptor (D-A) and Donor-Thiophene-Acceptor-Thiophene (D-T-A-T) structures have been systematically investigated by means of density functional theory (DFT) and time-dependent DFT (TD-DFT) at the B3LYP/6-311G* level. The introduction of thiophene (T) in the chain has allowed us to monitor the effect of π-spacers. Benchmark studies on the methodology have been carried out to predict the HOMO and LUMO energies and optical band gaps of the D-A systems accurately...
January 16, 2018: Physical Chemistry Chemical Physics: PCCP
Devin John Van Elburg, Scott D Noble, Simone Hagey, Andrew L Goertzen
Optical coupling is an important factor in detector design as it improves optical photon transmission by mitigating internal reflections at light-sharing boundaries. In this work we compare optical coupling materials, namely double-sided acrylic polymer tapes and silicone optical grease (SiG), in the context of positron emission tomography (PET). Four double-sided tapes from 3M of varying thicknesses (0.229mm-1.016mm) and adhesive materials ('100MP', adhesive 100 'A100', 'VHB') were characterized with spectrophotometer measurements and photopeak amplitude and energy resolution measurements using lutetium-yttrium oxy-orthosilicate (LYSO) coupled to photomultiplier tubes (PMT) or silicon photomultipliers (SiPMs)...
January 16, 2018: Physics in Medicine and Biology
Pi-Hui Hsu, Chao-Hsien Lee, Li-Kuo Kuo, Yu-Chung Kung, Wei-Ji Chen, Min-Su Tzeng
BACKGROUND: Due to studies on calorie requirement in mechanically ventilated critically ill elderly patients are few, and indirect calorimetry (IC) is not available in every intensive care unit (ICU). The aim of this study was to compare IC and Harris-Benedict (HB) predictive equation in different BMI groups. METHODS: A total of 177 mechanically ventilated critically ill elderly patients (≧65 years old) underwent IC for measured resting energy expenditure (MREE)...
January 11, 2018: Journal of the Formosan Medical Association, Taiwan Yi Zhi
Tae-Woo Kang, Duck-Won Oh, Ji-Hyun Lee, Heon-Seok Cynn
Normal walking includes coordinated and controlled movement of the legs and arms. However, patients following stroke often present with inappropriate motor control which limits coordinated movement patterns of the affected limbs. This study aimed to compare the effects of rhythmic arm swing and arm fixation during treadmill walking in patients with poststroke hemiparesis. We used an alternating study design with multiple baselines across subjects. Three patients with chronic stroke participated in this study...
January 16, 2018: Physiotherapy Theory and Practice
Önder Gül, Hao Zhang, Jouri D S Bommer, Michiel W A de Moor, Diana Car, Sébastien R Plissard, Erik P A M Bakkers, Attila Geresdi, Kenji Watanabe, Takashi Taniguchi, Leo P Kouwenhoven
Majorana modes are zero-energy excitations of a topological superconductor that exhibit non-Abelian statistics1-3. Following proposals for their detection in a semiconductor nanowire coupled to an s-wave superconductor4,5, several tunnelling experiments reported characteristic Majorana signatures6-11. Reducing disorder has been a prime challenge for these experiments because disorder can mimic the zero-energy signatures of Majoranas12-16, and renders the topological properties inaccessible17-20. Here, we show characteristic Majorana signatures in InSb nanowire devices exhibiting clear ballistic transport properties...
January 15, 2018: Nature Nanotechnology
Daniel S Terry, Rachel A Kolster, Matthias Quick, Michael V LeVine, George Khelashvili, Zhou Zhou, Harel Weinstein, Jonathan A Javitch, Scott C Blanchard
Neurotransmitter:sodium symporters (NSS), targets of antidepressants and psychostimulants, clear neurotransmitters from the synaptic cleft through sodium (Na+)-coupled transport. Substrate and Na+ are thought to be transported from the extracellular to intracellular space through an alternating access mechanism by coordinated conformational rearrangements in the symporter that alternately expose the binding sites to each side of the membrane. However, the mechanism by which the binding of ligands coordinates conformational changes occurring on opposite sides of the membrane is not well understood...
January 15, 2018: Nature Communications
Rajesh Kumar, Everson T S G da Silva, Rajesh K Singh, Raluca Savu, Andrei V Alaferdov, Leandro C Fonseca, Lory C Carossi, Arvind Singh, Sarita Khandka, Kamal K Kar, Oswaldo L Alves, Lauro T Kubota, Stanislav A Moshkalev
Palladium nanoparticles decorated reduced graphene oxide (Pd-rGO) and palladium nanoparticles intercalated inside nitrogen doped reduced graphene oxide (Pd-NrGO) hybrids have been synthesized by applying a very simple, fast and economic route using microwave-assisted in-situ reduction and exfoliation method. The Pd-NrGO hybrids materials show good activity as catalyst for ethanol electro oxidation for direct ethanol fuel cells (DEFCs) as compared to Pd-rGO hybrids. The enhanced direct ethanol fuel cell can serve as alternative to fossil fuels because it is renewable and environmentally-friendly with a high energy conversion efficiency and low pollutant emission...
January 8, 2018: Journal of Colloid and Interface Science
Sho Nishikawa, Misa Kamiya, Hiroki Aoyama, Mami Nomura, Takuma Hyodo, Aoi Ozeki, Hyunjin Lee, Tsukasa Takahashi, Atsushi Imaizumi, Takanori Tsuda
SCOPE: The induction of brown-like adipocytes in white adipose tissue (WAT) is a potential therapeutic target for the treatment of obesity and metabolic disorders via the ability of these cells to release excess energy as heat in association with uncoupling protein 1. Some experimental trials suggest that curcumin (a yellow pigment from turmeric) has a suppressive effect on the accumulation of body fat. However, there is little evidence to show that curcumin induces the formation of brown-like adipocytes and the molecular mechanisms involved remain elusive...
January 15, 2018: Molecular Nutrition & Food Research
Karina L R Canabrava, Fernanda R Faria, Jorge R P de Lima, Dartagnan P Guedes, Paulo R S Amorim
PURPOSE: This study aimed to compare the energy expenditure and intensity of active video games to that of treadmill walking in children and adolescents. METHOD: Seventy-two boys and girls (aged 8-13 years) were recruited from local public schools. Energy expenditure and heart rate were measured during rest, during 3-km/hr, 4-km/hr, and 5-km/hr walks, and during active games (Adventure, Boxing I, Boxing II, and Dance). During walking and active games, we also assessed physical activity using an accelerometer...
January 15, 2018: Research Quarterly for Exercise and Sport
Mohamed R Ben Khedher, Mohamed Hammami, Jonathan R S Arch, David C Hislop, Dominic Eze, Edward T Wargent, Małgorzata A Kępczyńska, Mohamed S Zaibi
Background: Salvia officinalis (sage) is a native plant to the Mediterranean region and has been used for a long time in traditional medicine for various diseases. We investigated possible anti-diabetic, anti-inflammatory and anti-obesity effects of sage methanol (MetOH) extract in a nutritional mouse model of obesity, inflammation and insulin resistance, as well as its effects on lipolysis and lipogenesis in 3T3-L1 cells. Methods: Diet-induced obese (DIO) mice were treated for five weeks with sage methanol extract (100 and 400 mg kg-1/day bid), or rosiglitazone (3 mg kg-1/day bid), as a positive control...
2018: PeerJ
Yong Hu, Hai-Long Wu, Xiao-Li Yin, Hui-Wen Gu, Rong Xiao, Li-Xia Xie, Zhi Liu, Huan Fang, Li Wang, Ru-Qin Yu
The aim of the present work was to develop a rapid and interference-free method based on liquid chromatography-mass spectrometry (LC-MS) for the simultaneous determination of nine B-group vitamins in various energy drinks. A smart and green strategy that modeled the three-way data array of LC-MS with second-order calibration methods based on alternating trilinear decomposition (ATLD) and alternating penalty trilinear decomposition (APTLD) algorithms was developed. By virtue of "mathematical separation" and "second-order advantage", the proposed strategy successfully solved the co-eluted peaks and unknown interferents in LC-MS analysis with the elution time less than 4...
April 1, 2018: Talanta
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