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https://www.readbyqxmd.com/read/29352581/facile-gas-chromatography-tandem-mass-spectrometry-stable-isotope-dilution-method-for-the-quantification-of-sesquiterpenes-in-grape
#1
Nina Duhamel, Davide Slaghenaufi, Lisa I Pilkington, Mandy Herbst-Johnstone, Roberto Larcher, David Barker, Bruno Fedrizzi
Sesquiterpenes are a widespread class of compounds of increasing interest found in grapes and wines, amongst many other natural sources. Due to a lack of standards and the complexity of the mass spectra fragmentation, accurate quantification of these low concentration compounds had not previously been accomplished. The current paper presents a new method for the concurrent quantification of several sesquiterpenes. The multivariate method optimisation is presented. Synthesised isotopic standards were utilised in conjunction with solid phase microextraction (SPME) and gas chromatography-tandem mass spectrometry (GC-MS/MS) to perform a standard isotope dilution assay (SIDA)...
January 5, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29352573/h%C3%A2-control-for-uncertain-linear-system-over-networks-with-bernoulli-data-dropout-and-actuator-saturation
#2
Jimin Yu, Chenchen Yang, Xiaoming Tang, Ping Wang
This paper investigates the H∞ control problems for uncertain linear system over networks with random communication data dropout and actuator saturation. The random data dropout process is modeled by a Bernoulli distributed white sequence with a known conditional probability distribution and the actuator saturation is confined in a convex hull by introducing a group of auxiliary matrices. By constructing a quadratic Lyapunov function, effective conditions for the state feedback-based H∞ controller and the observer-based H∞ controller are proposed in the form of non-convex matrix inequalities to take the random data dropout and actuator saturation into consideration simultaneously, and the problem of non-convex feasibility is solved by applying cone complementarity linearization (CCL) procedure...
January 15, 2018: ISA Transactions
https://www.readbyqxmd.com/read/29351726/paper-tools-and-periodic-tables-newlands-and-mendeleev-draw-grids
#3
Michael D Gordin
This essay elaborates on Ursula Klein's methodological concept of "paper tools" by drawing on several examples from the history of the periodic table. Moving from John A. R. Newlands's "Law of Octaves," to Dmitrii Mendeleev's first drafts of his periodic system in 1869, to Mendeleev's chemical speculations on the place of the ether within his classification, one sees that the ways in which the scientists presented the balance between empirical data and theoretical manipulation proved crucial for the chemical community's acceptance or rejection of their proposed innovations...
January 19, 2018: Ambix
https://www.readbyqxmd.com/read/29351656/evaluation-of-a-new-neutron-energy-spectrum-unfolding-code-based-on-an-adaptive-neuro-fuzzy-inference-system-anfis
#4
Seyed Abolfazl Hosseini, Iman Esmaili Paeen Afrakoti
The purpose of the present study was to reconstruct the energy spectrum of a poly-energetic neutron source using an algorithm developed based on an Adaptive Neuro-Fuzzy Inference System (ANFIS). ANFIS is a kind of artificial neural network based on the Takagi-Sugeno fuzzy inference system. The ANFIS algorithm uses the advantages of both fuzzy inference systems and artificial neural networks to improve the effectiveness of algorithms in various applications such as modeling, control and classification. The neutron pulse height distributions used as input data in the training procedure for the ANFIS algorithm were obtained from the simulations performed by MCNPX-ESUT computational code (MCNPX-Energy engineering of Sharif University of Technology)...
January 17, 2018: Journal of Radiation Research
https://www.readbyqxmd.com/read/29351554/field-data-based-mathematical-modeling-by-bode-equations-and-vector-fitting-algorithm-for-renewable-energy-applications
#5
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/29351306/an-approach-to-localization-for-ensemble-based-data-assimilation
#6
Bin Wang, Juanjuan Liu, Li Liu, Shiming Xu, Wenyu Huang
Localization techniques are commonly used in ensemble-based data assimilation (e.g., the Ensemble Kalman Filter (EnKF) method) because of insufficient ensemble samples. They can effectively ameliorate the spurious long-range correlations between the background and observations. However, localization is very expensive when the problem to be solved is of high dimension (say 106 or higher) for assimilating observations simultaneously. To reduce the cost of localization for high-dimension problems, an approach is proposed in this paper, which approximately expands the correlation function of the localization matrix using a limited number of principal eigenvectors so that the Schür product between the localization matrix and a high-dimension covariance matrix is reduced to the sum of a series of Schür products between two simple vectors...
2018: PloS One
https://www.readbyqxmd.com/read/29351297/a-fast-combination-method-in-dsmt-and-its-application-to-recommender-system
#7
Yilin Dong, Xinde Li, Yihai Liu
In many applications involving epistemic uncertainties usually modeled by belief functions, it is often necessary to approximate general (non-Bayesian) basic belief assignments (BBAs) to subjective probabilities (called Bayesian BBAs). This necessity occurs if one needs to embed the fusion result in a system based on the probabilistic framework and Bayesian inference (e.g. tracking systems), or if one needs to make a decision in the decision making problems. In this paper, we present a new fast combination method, called modified rigid coarsening (MRC), to obtain the final Bayesian BBAs based on hierarchical decomposition (coarsening) of the frame of discernment...
2018: PloS One
https://www.readbyqxmd.com/read/29351254/bridge-structure-deformation-prediction-based-on-gnss-data-using-kalman-arima-garch-model
#8
Jingzhou Xin, Jianting Zhou, Simon X Yang, Xiaoqing Li, Yu Wang
Bridges are an essential part of the ground transportation system. Health monitoring is fundamentally important for the safety and service life of bridges. A large amount of structural information is obtained from various sensors using sensing technology, and the data processing has become a challenging issue. To improve the prediction accuracy of bridge structure deformation based on data mining and to accurately evaluate the time-varying characteristics of bridge structure performance evolution, this paper proposes a new method for bridge structure deformation prediction, which integrates the Kalman filter, autoregressive integrated moving average model (ARIMA), and generalized autoregressive conditional heteroskedasticity (GARCH)...
January 19, 2018: Sensors
https://www.readbyqxmd.com/read/29350645/developments-in-the-management-of-bone-metastases-with-interventional-radiology
#9
Francesco Arrigoni, Federico Bruno, Luigi Zugaro, Raffaele Natella, Salvatore Cappabianca, Umberto Russo, Vito Roberto Papapietro, Alessandra Splendiani, Ernesto Di Cesare, Carlo Masciocchi, Antonio Barile
Interventional radiology has known an exponential growth in the last years. Technological advances of the last decades, have made it possible to use new treatments on a larger scale, with safe and effective results. They could be considered as palliative treatments for painful lesions but also curative procedures, as single treatment or specially in combination with other techniques (surgery, radiation and oncology therapies, etc.).The main diffuse techniques are those of thermal ablation that destroy the target lesion through the heat; however there are also endovascular therapies that destroy the target tissue thanks to devascularization...
January 19, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29350548/use-of-helical-tomotherapy-in-locally-advanced-and-or-metastatic-breast-cancer-for-locoregional-treatment
#10
Laura Thery, Alexandre Arsene-Henry, Susan Carroll, Dominique Peurien, Louis Bazire, Magalie Robilliard, Alain Fourquet, Youlia M Kirova
PURPOSE: Helical tomotherapy (HT) is a new promising tool whose use remains to be studied. This work assesses its impact for local irradiation in terms of side effects, as well as tumour control in locally advanced (LABC) and metastatic breast cancer (MBC). METHODS: We retrospectively reviewed data of 66 patients with LABC and MBC. Patients received standard fractionated radiotherapy by HT, with or without concurrent systemic treatment. RESULTS: The median age was 60 years (28-77)...
January 19, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29350546/-we-re-like-a-gang-we-stick-together-experiences-of-ventricular-assist-device-communities
#11
Holly C Standing, Catherine Exley, Guy A MacGowan, Tim Rapley
BACKGROUND: Ventricular assist devices (VADs) are a relatively new development in the management of advanced heart failure. In the UK, VAD recipients comprise a unique group of less than 200 patients. This is the first paper to explore the experience of VAD communities, the extent to which communities are developed around the device, and how these influence the experience of living with the VAD. METHODS: Qualitative interviews were conducted with 20 VAD recipients (implanted as a bridge to transplantation), 11 interviews also included the VAD recipients' partners...
January 1, 2018: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/29350395/early-results-of-aortic-arch-reconstruction-and-bilateral-pulmonary-arteries-banding-modification-of-the-norwood-operation-for-treatment-of-hypoplastic-left-heart-syndrome
#12
Jacek W Pająk, Michał Buczyński, Piotr Stanek, Grzegorz Zalewski, Marek Wites, Lesław Szydłowski, Lidia Tomkiewicz-Pająk
BACKGROUND: In the period from 2003 to the end of 2015, 96 Norwood I procedures were performed in Pediatric Heart Surgery Department in Katowice, Poland, in children with hypoplastic left heart syndrome (HLHS). AIM: This paper presents a retrospective analysis of early surgical results. METHODS: The patients consisted of two groups: Group I included 59 children operated on in the years 2003-2012 in whom the stage I Norwood procedure with the Sano modification was performed with the aortic arch reconstructed by use of a homogenous pulmonary artery patch or a bovine pericardial patch...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350235/pressure-induced-photoluminescence-modulation-in-a-wide-range-and-synthesis-of-monodispersed-ternary-agcus-nanocrystal-based-on-ag2s-nanocrystals
#13
Yingnan Wang, Xiaoteng Li, Manzhang Xu, Kai Wang, Hongyang Zhu, Wu Zhao, Junfeng Yan, Zhiyong Zhang
Binary Ag2S nanocrystals (NCs) have many potential optical applications because of their low toxicity, narrow direct band gaps and near-infrared photoluminescence (PL) with high emission efficiency. However, due to its small exciton Bohr radius (2.2 nm), the PL spectra of Ag2S NCs can only be modulated below ∼1200 nm with increasing particle size. Meanwhile, ternary silver copper chalcogenides (AgCuX, X = S, Se) have also attracted increased attention in recent years. Temperature-dependent structural phase transformation leads electrical transport to exhibit fascinating transitions between p and n type conduction, which makes AgCuS and AgCuSe ideal materials for diode or transistor devices...
January 19, 2018: Nanoscale
https://www.readbyqxmd.com/read/29350073/in-their-own-words-a-synthesis-of-the-qualitative-research-on-the-experiences-of-adults-seeking-asylum-a-systematic-review-of-qualitative-findings-in-forced-migration
#14
Thomas Hoare, Andrew Vidgen, Neil Roberts
Quantitative research indicates that some forced migrants have mental health needs. Asylum seekers are a group of forced migrants applying for asylum status in a host country, and are often subject to rights restrictions and threat of deportation, though little is known about subjective experiences of the asylum journey and process of claiming asylum. The current paper therefore describes a systematic review of the qualitative literature, examining asylum seekers experiences of asylum journey, from country of origin, to arrival and adaptation to host countries...
December 2017: Medicine, Conflict, and Survival
https://www.readbyqxmd.com/read/29349854/implementing-health-and-social-care-integration-in-scotland-renegotiating-new-partnerships-in-changing-cultures-of-care
#15
Charlotte Pearson, Nick Watson
Health and social care integration has been a long-term goal for successive governments in Scotland, culminating in the implementation of the recent Public Bodies (Joint Working) Scotland Act 2014. This laid down the foundations for the delegation of health and social care functions and resources to newly formed Integrated Joint Boards. It put in place demands for new ways of working and partnership planning. In this article, we explore the early implementation of this Act and how health and social care professionals and the third sector have begun to renegotiate their roles...
January 18, 2018: Health & Social Care in the Community
https://www.readbyqxmd.com/read/29349697/to-share-or-not-to-share-expected-pros-and-cons-of-data-sharing-in-radiological-research
#16
EDITORIAL
Francesco Sardanelli, Marco Alì, Myriam G Hunink, Nehmat Houssami, Luca M Sconfienza, Giovanni Di Leo
The aims of this paper are to illustrate the trend towards data sharing, i.e. the regulated availability of the original patient-level data obtained during a study, and to discuss the expected advantages (pros) and disadvantages (cons) of data sharing in radiological research. Expected pros include the potential for verification of original results with alternative or supplementary analyses (including estimation of reproducibility), advancement of knowledge by providing new results by testing new hypotheses (not explored by the original authors) on pre-existing databases, larger scale analyses based on individual-patient data, enhanced multidisciplinary cooperation, reduced publication of false studies, improved clinical practice, and reduced cost and time for clinical research...
January 18, 2018: European Radiology
https://www.readbyqxmd.com/read/29349516/new-perspectives-in-the-history-of-twentieth-century-life-sciences-historical-historiographical-and-epistemological-themes
#17
Robert Meunier, Kärin Nickelsen
The history of twentieth-century life sciences is not exactly a new topic. However, in view of the increasingly rapid development of the life sciences themselves over the past decades, some of the well-established narratives are worth revisiting. Taking stock of where we stand on these issues was the aim of a conference in 2015, entitled "Perspectives for the History of Life Sciences" (Munich, Oct 30-Nov 1, 2015). The papers in this topical collection are based on work presented and discussed at and around this meeting...
January 18, 2018: History and Philosophy of the Life Sciences
https://www.readbyqxmd.com/read/29349458/trends-in-adsorption-of-electrocatalytic-water-splitting-intermediates-on-cubic-abo3-oxides
#18
Joseph H Montoya, Andrew D Doyle, Jens K Nørskov, Aleksandra Vojvodic
The reactivity of solid oxide surfaces towards adsorption of oxygen and hydrogen is a key metric for the design of new catalysts for electrochemical water splitting. In this paper, we report on trends in the adsorption energy of different adsorbed intermediates derived from the oxidation and reduction of water for ternary ABO3 oxides in the cubic perovskite structure. Our findings support a previously reported trend that rationalizes the observed lower bound in oxygen evolution (OER) overpotentials from correlations in OH* and OOH* adsorption energies...
January 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29349206/dark-shadow-of-the-long-white-cloud-neighborhood-safety-is-associated-with-self-rated-health-and-cortisol-during-pregnancy-in-auckland-aotearoa-new-zealand
#19
Zaneta M Thayer
Auckland, Aotearoa/New Zealand is a culturally and ethnically diverse city. Despite popular global conceptions regarding its utopian nature, the lived experience for many individuals in Auckland attests to the substantial social, economic, and health inequalities that exist there. In particular, rapidly rising home prices constrain housing decisions and force individuals to live in less desirable neighborhoods, with potential impacts on individual health. One of the pathways through which adverse neighborhood conditions could impact health is through alterations in the functioning of the hypothalamic pituitary adrenal (HPA)-axis, which regulates the physiological stress response...
December 2017: SSM—Population Health
https://www.readbyqxmd.com/read/29348444/toxicdocs-www-toxicdocs-org-from-history-buried-in-stacks-of-paper-to-open-searchable-archives-online
#20
EDITORIAL
David Rosner, Gerald Markowitz, Merlin Chowkwanyun
As a result of a legal mechanism called discovery, the authors accumulated millions of internal corporate and trade association documents related to the introduction of new products and chemicals into workplaces and commerce. What did these private entities discuss among themselves and with their experts? The plethora of documents, both a blessing and a curse, opened new sources and interesting questions about corporate and regulatory histories. But they also posed an almost insurmountable challenge to historians...
February 2018: Journal of Public Health Policy
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