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https://www.readbyqxmd.com/read/29351554/field-data-based-mathematical-modeling-by-bode-equations-and-vector-fitting-algorithm-for-renewable-energy-applications
#1
A H Sabry, W Z W Hasan, M Z A Ab Kadir, M A M Radzi, S Shafie
The power system always has several variations in its profile due to random load changes or environmental effects such as device switching effects when generating further transients. Thus, an accurate mathematical model is important because most system parameters vary with time. Curve modeling of power generation is a significant tool for evaluating system performance, monitoring and forecasting. Several numerical techniques compete to fit the curves of empirical data such as wind, solar, and demand power rates...
2018: PloS One
https://www.readbyqxmd.com/read/29351553/hierarchical-and-hybrid-energy-storage-devices-in-data-centers-architecture-control-and-provisioning
#2
Mengshu Sun, Yuankun Xue, Paul Bogdan, Jian Tang, Yanzhi Wang, Xue Lin
Recently, a new approach has been introduced that leverages and over-provisions energy storage devices (ESDs) in data centers for performing power capping and facilitating capex/opex reductions, without performance overhead. To fully realize the potential benefits of the hierarchical ESD structure, we propose a comprehensive design, control, and provisioning framework including (i) designing power delivery architecture supporting hierarchical ESD structure and hybrid ESDs for some levels, as well as (ii) control and provisioning of the hierarchical ESD structure including run-time ESD charging/discharging control and design-time determination of ESD types, homogeneous/hybrid options, ESD provisioning at each level...
2018: PloS One
https://www.readbyqxmd.com/read/29351498/high-power-diode-laser-on-management-of-drug-induced-gingival-overgrowth-report-of-two-cases-and-long-term-follow-up
#3
Luana Campos, Marina Gallottini, Débora Pallos, Alyne Simões, Fabiana Martins
BACKGROUND: Drug-induced gingival overgrowth (DIGO) is attributed mainly to the prolonged use of calcium channel blocking agents, anticonvulsants, and anti-calcineurin inhibitors . The management of DIGO depends on the severity of the disease and includes surgical intervention and plaque control. Compared to conventional surgical treatment, the recent literature data have shown that gingivectomy using a high-power laser (HPL) is a short and easy procedure, which results in minimal postoperative discomfort and greater patient accep- tance...
January 19, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29351291/allometric-biomass-equations-for-12-tree-species-in-coniferous-and-broadleaved-mixed-forests-northeastern-china
#4
Huaijiang He, Chunyu Zhang, Xiuhai Zhao, Folega Fousseni, Jinsong Wang, Haijun Dai, Song Yang, Qiang Zuo
Understanding forest carbon budget and dynamics for sustainable resource management and ecosystem functions requires quantification of above- and below-ground biomass at individual tree species and stand levels. In this study, a total of 122 trees (9-12 per species) were destructively sampled to determine above- and below-ground biomass of 12 tree species (Acer mandshuricum, Acer mono, Betula platyphylla, Carpinus cordata, Fraxinus mandshurica, Juglans mandshurica, Maackia amurensis, P. koraiensis, Populus ussuriensis, Quercus mongolica, Tilia amurensis and Ulmus japonica) in coniferous and broadleaved mixed forests of Northeastern China, an area of the largest natural forest in the country...
2018: PloS One
https://www.readbyqxmd.com/read/29351258/a-polymer-optical-fiber-temperature-sensor-based-on-material-features
#5
Arnaldo Leal-Junior, Anselmo Frizera-Netoc, Carlos Marques, Maria José Pontes
This paper presents a polymer optical fiber (POF)-based temperature sensor. The operation principle of the sensor is the variation in the POF mechanical properties with the temperature variation. Such mechanical property variation leads to a variation in the POF output power when a constant stress is applied to the fiber due to the stress-optical effect. The fiber mechanical properties are characterized through a dynamic mechanical analysis, and the output power variation with different temperatures is measured...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29351248/a-comprehensive-study-of-a-micro-channel-heat-sink-using-integrated-thin-film-temperature-sensors
#6
Tao Wang, Jiejun Wang, Jian He, Chuangui Wu, Wenbo Luo, Yao Shuai, Wanli Zhang, Xiancai Chen, Jian Zhang, Jia Lin
A micro-channel heat sink is a promising cooling method for high power integrated circuits (IC). However, the understanding of such a micro-channel device is not sufficient, because the tools for studying it are very limited. The details inside the micro-channels are not readily available. In this letter, a micro-channel heat sink is comprehensively studied using the integrated temperature sensors. The highly sensitive thin film temperature sensors can accurately monitor the temperature change in the micro-channel in real time...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29351166/the-neuromuscular-biochemical-endocrine-and-mood-responses-to-small-sided-games-training-in-professional-soccer
#7
Sparkes W, Turner An, Weston M, Russell M, Johnston Mj, Kilduff Lp
The 24h responses to small-sided games (SSG) soccer training were characterized. Professional soccer players (n=16) performed SSG's (4vs4 + goalkeepers; 6x7-min, 2-min inter-set recovery) with performance (peak-power output, PPO; jump height, JH), physiological (blood creatine kinase: CK, lactate; salivary testosterone, cortisol), and mood measures collected before (baseline), and after (immediately; 0h, +2h, +24h). For PPO and JH, possibly small-moderate reductions occurred at 0h (-1.1W·kg; ±0.9W·kg, -3...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351163/comparison-of-the-force-velocity-and-power-time-curves-between-the-concentric-only-and-eccentric-concentric-bench-press-exercises
#8
Alejandro Pérez-Castilla, Paul Comfort, John J McMahon, Francisco Luis Pestaña-Melero, Amador García-Ramos
The aim of this study was to compare the temporal and mechanical variables between the concentric-only and eccentric-concentric bench press (BP) variants. Twenty-one men (age: 22.0±4.2 years, body mass: 73.4±7.7 kg, height: 177.2±8.0 cm; one-repetition maximum [1RM]: 1.12±0.12 kg⋅kg) were evaluated during the concentric-only and eccentric-concentric BP variants using 80% 1RM. Temporal (concentric phase duration, propulsive phase duration, and time to reach the maximum values of force, velocity, and power) and mechanical variables (force, velocity, and power), determined using a linear velocity transducer, were compared between both BP variants...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351162/potentiation-effects-of-the-french-contrast-method-on-the-vertical-jumping-ability
#9
Joseba Andoni Hernández-Preciado, Eneko Baz, Carlos Balsalobre-Fernández, David Marchante, Jordan Santos-Concejero
This study examined the acute effects of the potentiation protocol known as French Contrast Method on the vertical jumping ability measured by a countermovement jump (CMJ). 31 athletes participated in the study (intervention group n=17 and control group n=14). The CMJ height was measured using the IOS application MyJump App 2.0 pre- and post- the French Contrast protocol, which consisted of 3 sets of isometric partial squats, drop jumps, dynamic half-squats and hurdle jumps. The CMJ height improved from its baseline values by 5...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351161/effects-of-contrast-strength-vs-plyometric-training-on-lower-limb-explosive-performance-ability-to-change-direction-and-neuromuscular-adaptation-in-soccer-players
#10
Mehrez Hammami, Nawel Gaamouri, Roy J Shephard, Mohamed Souhaiel Chelly
The aim was to compare the effects of two differing 8-week in-season strength training programs (contrast strength training [CST] vs. plyometric training [PT]) on selected performance tests (5 and 40m sprints, S 4 X 5 m change of direction test, squat (SJ) and countermovement (CMJ) jumps , leg peak power on a cycle ergometer force-velocity test, 1-repetition maximal (1-RM) half squat, and electromyographic [EMG] activity of the vastus lateralis, vastus medialis and rectus femoris muscles during vertical jump tests)...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351158/physical-performance-measures-of-flexibility-hip-strength-lower-limb-power-and-trunk-endurance-in-healthy-navy-cadets-normative-data-and-differences-between-sex-and-limb-dominance
#11
Thiago Jambo Alves Lopes, Milena Simic, Daniel de Souza Alves, Priscila Dos Santos Bunn, Allan Inoue Rodrigues, Bruno de Souza Terra, Maicom da Silva Lima, Fabrício Miranda Ribeiro, Patrick Vilão, Evangelos Pappas
The objectives were to provide normative data on commonly used physical performance tests that may be associated with musculoskeletal injuries in Navy cadets, and assess for sex and limb dominance differences. A large cohort of Navy cadets were assessed for physical performance tests of flexibility (ankle dorsiflexion range of motion and sit and reach), isometric hip strength, lower limb power (single leg hop), and trunk endurance (plank and side plank tests). Besides providing normative data tables, sex and limb dominance differences were assessed by a two-way mixed ANOVA...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351120/grading-using-ki-67-index-and-mitotic-rate-increases-the-prognostic-accuracy-of-pancreatic-neuroendocrine-tumors
#12
Prejesh Philips, David A Kooby, Shishir Maithel, Nipun B Merchant, Sharon M Weber, Emily R Winslow, Syed Ahmad, Hong J Kim, Charles R Scoggins, Kelly M McMasters, Robert C G Martin
OBJECTIVES: To measure the usefulness of Ki-67 proliferative index (Ki-67 index) as a prognostic variable for grading pancreatic neuroendocrine tumors. METHODS: A multi-institutional prospective database comprising 350 patients. Grading based on mitotic activity (<2 mitoses/10 high-power fields, 2-20 and >20) and Ki-67 index (<3% per 10 high-power fields, 3%-20% and >20%). Final grade selected based on higher grade of either variable. RESULTS: Most patients were in the less than 3% (n = 158) and 3% to 20% Ki-67 category (n = 107), with a minority being high-grade (Ki-67 > 20%, n = 27)...
January 18, 2018: Pancreas
https://www.readbyqxmd.com/read/29351108/neuroimaging-in-neurodevelopmental-disorders-focus-on-resting-state-fmri-analysis-of-intrinsic-functional-brain-connectivity
#13
Allison Jack
PURPOSE OF REVIEW: Resting-state fMRI assessment of instrinsic functional brain connectivity (rs-fcMRI) in autism spectrum disorders (ASD) allows assessment of participants with a wide range of functioning levels, and collection of multisite databases that facilitate large-scale analysis. These heterogeneous multisite data present both promise and methodological challenge. Herein, we provide an overview of recent (1 October 2016-1 November 2017) empirical research on ASD rs-fcMRI, focusing on work that helps clarify how best to leverage the power of these data...
January 17, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29351098/prognostic-factors-change-over-time-after-hepatectomy-for-colorectal-liver-metastases-a-multi-institutional-international-analysis-of-1099-patients
#14
Georgios Antonios Margonis, Stefan Buettner, Nikolaos Andreatos, Doris Wagner, Kazunari Sasaki, Carlotta Barbon, Andrea Beer, Carsten Kamphues, Inger Marie Løes, Jin He, Timothy M Pawlik, Klaus Kaczirek, George Poultsides, Per Eystein Lønning, John L Cameron, Hans Joerg Mischinger, Federico N Aucejo, Martin E Kreis, Christopher L Wolfgang, Matthew J Weiss
OBJECTIVE: To evaluate the changing impact of genetic and clinicopathologic factors on conditional overall survival (CS) over time in patients with resectable colorectal liver metastasis. BACKGROUND: CS estimates account for the changing likelihood of survival over time and may reveal the changing impact of prognostic factors as time accrues from the date of surgery. METHODS: CS analysis was performed in 1099 patients of an international, multi-institutional cohort...
January 18, 2018: Annals of Surgery
https://www.readbyqxmd.com/read/29351014/coinfection-timing-drives-host-population-dynamics-through-changes-in-virulence
#15
Katherine M Marchetto, Alison G Power
Infections of one host by multiple parasites are common, and several studies have found that the order of parasite invasion can affect both within-host competition and disease severity. However, it is unclear to what extent coinfection timing might be important to consider when modeling parasite impacts on host populations. Using a model system of two viruses infecting barley, we found that simultaneous infections of the two viruses were significantly more damaging to hosts than sequential coinfections. While priority effects were evident in within-host concentrations of sequential coinfections, priority did not influence any parameters (such as virulence or transmission rate) that affect host population dynamics...
February 2018: American Naturalist
https://www.readbyqxmd.com/read/29350964/generation-of-high-power-high-intensity-short-x-ray-free-electron-laser-pulses
#16
Marc W Guetg, Alberto A Lutman, Yuantao Ding, Timothy J Maxwell, Franz-Josef Decker, Uwe Bergmann, Zhirong Huang
X-ray free-electron lasers combine a high pulse power, short pulse length, narrow bandwidth, and high degree of transverse coherence. Any increase in the photon pulse power, while shortening the pulse length, will further push the frontier on several key x-ray free-electron laser applications including single-molecule imaging and novel nonlinear x-ray methods. This Letter shows experimental results at the Linac Coherent Light Source raising its maximum power to more than 300% of the current limit while reducing the photon pulse length to 10 fs...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350962/high-speed-device-independent-quantum-random-number-generation-without-a-detection-loophole
#17
Yang Liu, Xiao Yuan, Ming-Han Li, Weijun Zhang, Qi Zhao, Jiaqiang Zhong, Yuan Cao, Yu-Huai Li, Luo-Kan Chen, Hao Li, Tianyi Peng, Yu-Ao Chen, Cheng-Zhi Peng, Sheng-Cai Shi, Zhen Wang, Lixing You, Xiongfeng Ma, Jingyun Fan, Qiang Zhang, Jian-Wei Pan
Quantum mechanics provides the means of generating genuine randomness that is impossible with deterministic classical processes. Remarkably, the unpredictability of randomness can be certified in a manner that is independent of implementation devices. Here, we present an experimental study of device-independent quantum random number generation based on a detection-loophole-free Bell test with entangled photons. In the randomness analysis, without the independent identical distribution assumption, we consider the worst case scenario that the adversary launches the most powerful attacks against the quantum adversary...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350960/enhanced-electromagnetic-corrections-to-the-rare-decay-b_-s-d-%C3%A2-%C3%AE-%C3%AE
#18
Martin Beneke, Christoph Bobeth, Robert Szafron
We investigate electromagnetic corrections to the rare B-meson leptonic decay B_{s,d}→μ^{+}μ^{-} from scales below the bottom-quark mass m_{b}. Contrary to QCD effects, which are entirely contained in the B-meson decay constant, we find that virtual photon exchange can probe the B-meson structure, resulting in a "nonlocal annihilation" effect. We find that this effect gives rise to a dynamical enhancement by a power of m_{b}/Λ_{QCD} and by large logarithms. The impact of this novel effect on the branching ratio of B_{s,d}→μ^{+}μ^{-} is about 1%, of the order of the previously estimated nonparametric theoretical uncertainty, and four times the size of previous estimates of next-to-leading order QED effects due to residual scale dependence...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350948/evolution-of-temporal-coherence-in-confined-exciton-polariton-condensates
#19
M Klaas, H Flayac, M Amthor, I G Savenko, S Brodbeck, T Ala-Nissila, S Klembt, C Schneider, S Höfling
We study the influence of spatial confinement on the second-order temporal coherence of the emission from a semiconductor microcavity in the strong coupling regime. The confinement, provided by etched micropillars, has a favorable impact on the temporal coherence of solid state quasicondensates that evolve in our device above threshold. By fitting the experimental data with a microscopic quantum theory based on a quantum jump approach, we scrutinize the influence of pump power and confinement and find that phonon-mediated transitions are enhanced in the case of a confined structure, in which the modes split into a discrete set...
January 5, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29350916/rhombohedral-to-cubic-conversion-of-gete-via-mnte-alloying-leads-to-ultralow-thermal-conductivity-electronic-band-convergence-and-high-thermoelectric-performance
#20
Zheng Zheng, Xianli Su, Rigui Deng, Constantinos C Stoumpos, Hongyao Xie, Wei Liu, Yonggao Yan, Shiqiang Hao, Ctirad Uher, Chris Wolverton, Mercouri G Kanatzidis, Xinfeng Tang
In this study, a series of Ge1-xMnxTe (x=0-0.21) compounds were prepared by melting-quenching-annealing process combined with Spark Plasma Sintering (SPS). The effect of alloying MnTe into GeTe on the structure and thermoelectric properties of Ge1-xMnxTe is profound. With increasing content of MnTe, the structure of the Ge1-xMnxTe compounds gradually changes from rhombohedral to cubic, and the known R3m to Fm-3m phase transition temperature of GeTe moves from 700 K closer to room temperature. First-principles density functional theory calculations show that alloying MnTe into GeTe decreases the energy difference between the light and heavy valence bands in both the R3m and the Fm-3m structures, enhancing a multi-band character of the valence band edge that increases the hole carrier effective mass...
January 19, 2018: Journal of the American Chemical Society
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