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https://www.readbyqxmd.com/read/28738509/ambient-sediment-quality-conditions-in-minnesota-lakes-usa-effects-of-watershed-parameters-and-aquatic-health-implications
#1
Judy L Crane
Surficial sediments were collected from 50 randomly selected Minnesota lakes, plus four a priori reference lakes, in 2007. The lakes encompassed broad geographic coverage of the state and included a variety of major land uses in the surrounding watersheds. Sediment samples were analyzed for a suite of metals, metalloids, persistent organic pollutants, total organic carbon, and particle size fractions. In addition, a small fish survey was conducted to assess PBDEs in both whole fish and fish tissues. Sediment quality in this set of lakes ranged from good (43%) to moderate (57%) based on an integrative measure of multiple contaminants...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738039/chemotherapy-extravasation-establishing-a-national-benchmark-for-incidence-among-cancer-centers
#2
Jeannette Jackson-Rose, Judith Del Monte, Adrienne Groman, Linda S Dial, Leah Atwell, Judy Graham, Rosemary O'Neil Semler, Maryellen O'Sullivan, Lisa Truini-Pittman, Terri A Cunningham, Lisa Roman-Fischetti, Eileen Costantinou, Chris Rimkus, Adrienne J Banavage, Barbara Dietz, Carol J Colussi, Kimberly Catania, Michelle Wasko, Kevin A Schreffler, Colleen West, Mary Lou Siefert, Robert David Rice
BACKGROUND: Given the high-risk nature and nurse sensitivity of chemotherapy infusion and extravasation prevention, as well as the absence of an industry benchmark, a group of nurses studied oncology-specific nursing-sensitive indicators. 
. OBJECTIVES: The purpose was to establish a benchmark for the incidence of chemotherapy extravasation with vesicants, irritants, and irritants with vesicant potential.
. METHODS: Infusions with actual or suspected extravasations of vesicant and irritant chemotherapies were evaluated...
August 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28736893/benchmarking-density-functional-tight-binding-models-for-barrier-heights-and-reaction-energetics-of-organic-molecules
#3
Maja Gruden, Ljubica Andjeklović, Akkarapattiakal Kuriappan Jissy, Stepan Stepanović, Matija Zlatar, Qiang Cui, Marcus Elstner
Density Functional Tight Binding (DFTB) models are two to three orders of magnitude faster than ab initio and Density Functional Theory (DFT) methods and therefore are particularly attractive in applications to large molecules and condensed phase systems. To establish the applicability of DFTB models to general chemical reactions, we conduct benchmark calculations for barrier heights and reaction energetics of organic molecules using existing databases and several new ones compiled in this study. Structures for the transition states and stable species have been fully optimized at the DFTB level, making it possible to characterize the reliability of DFTB models in a more thorough fashion compared to conducting single point energy calculations as done in previous benchmark studies...
July 24, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/28736864/brain-tumor-segmentation-using-holistically-nested-neural-networks-in-mri-images
#4
Ying Zhuge, Andra V Krauze, Holly Ning, Jason Y Cheng, Barbara C Arora, Kevin Camphausen, Robert W Miller
PURPOSE: Gliomas are rapidly progressive, neurologically devastating, largely fatal brain tumors. Magnetic Resonance Imaging (MRI) is a widely used technique employed in the diagnosis and management of gliomas in clinical practice. MRI is also the standard imaging modality used to delineate the brain tumor target as part of treatment planning for the administration of radiation therapy. Despite more than 20 years of research and development, computational brain tumor segmentation in MRI images remains a challenging task...
July 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/28736572/an-index-to-characterize-female-career-promotion-in-academic-medicine
#5
Dörthe Brüggmann, David A Groneberg
BACKGROUND: Imbalances in female career promotion are a key factor of gender disparities at the workplace. They may lead to stress and stress-related diseases including burnout, depression or cardiovascular diseases. Since this problem cannot be generalized and varies between different fields, new approaches are needed to assess and describe the magnitude of the problem in single fields of work. METHODS: To construct a new index, operating figures of female and male medical students were collected for Germany in a period over 15 years and their progression throughout their studies towards specialization and academic chair positions...
2017: Journal of Occupational Medicine and Toxicology
https://www.readbyqxmd.com/read/28736569/deep-plant-phenomics-a-deep-learning-platform-for-complex-plant-phenotyping-tasks
#6
Jordan R Ubbens, Ian Stavness
Plant phenomics has received increasing interest in recent years in an attempt to bridge the genotype-to-phenotype knowledge gap. There is a need for expanded high-throughput phenotyping capabilities to keep up with an increasing amount of data from high-dimensional imaging sensors and the desire to measure more complex phenotypic traits (Knecht et al., 2016). In this paper, we introduce an open-source deep learning tool called Deep Plant Phenomics. This tool provides pre-trained neural networks for several common plant phenotyping tasks, as well as an easy platform that can be used by plant scientists to train models for their own phenotyping applications...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28736151/multi-loop-nonlinear-control-design-for-performance-improvement-of-lti-systems
#7
Raaja Ganapathy Subramanian, Vinodh Kumar Elumalai
This paper puts forward a multi-loop nonlinear control (MLNC) strategy to overcome the limited performance of LTI controllers due to the so-called "waterbed" effect. According to "Bode's sensitivity integral", increasing the bandwidth or additional integral gain of LTI controller to improve the low-frequency disturbance attenuation irrefutably increases the sensitivity to high-frequency disturbances or measurement noise. Hence, it is impossible to attain the best of both worlds in the case of linear controllers...
July 20, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28735102/intra-operatively-measured-spastic-semimembranosus-forces-of-children-with-cerebral-palsy
#8
Can A Yucesoy, Yener Temelli, Filiz Ateş
The knee kept forcibly in a flexed position is typical in cerebral palsy. Using a benchmark, we investigate intra-operatively if peak spastic hamstring force is measured in flexed knee positions. This tests the assumed shift of optimal length due to adaptation of spastic muscle and a decreasing force trend towards extension. Previously we measured spastic gracilis (GRA) and semitendinosus (ST) forces. Presently, we studied spastic semimembranosus (SM) and tested the following hypotheses: spastic SM forces are (1) high in flexed and (2) low in extended positions...
July 12, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28734963/variability-in-elective-day-surgery-rates-between-belgian-hospitals-analyses-of-administrative-data-explained-by-surgical-experts
#9
Roos Leroy, Cécile Camberlin, Mélanie Lefèvre, Koen Van den Heede, Carine Van de Voorde, Claire Beguin
BACKGROUND: In the last decades, day surgery has steadily and significantly grown in many countries, yet the increase has been uneven. There are large variations in day-surgery activity between countries, but also within countries between hospitals and surgeons. This paper explores the variability in day-care activity for elective surgical procedures between Belgian hospitals. MATERIALS AND METHODS: The administrative hospital data of all patients formally admitted in a Belgian hospital for inpatient or day-surgery care between 2011 and 2013 were analysed and summarized in graphs...
July 19, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28734799/eeg-analysis-of-seizure-patterns-using-visibility-graphs-for-detection-of-generalized-seizures
#10
Lei Wang, Xi Long, Johan B A M Arends, Ronald M Aarts
BACKGROUND: The traditional EEG features in the time and frequency domain show limited seizure detection performance in the epileptic population with intellectual disability (ID). In addition, the influence of EEG seizure patterns on detection performance was less studied. NEW METHOD: A single-channel EEG signal can be mapped into visibility graphs (VGS), including basic visibility graph (VG), horizontal VG (HVG), and difference VG (DVG). These graphs were used to characterize different EEG seizure patterns...
July 19, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28734773/epico-4-0-total-quality-in-the-management-of-invasive-candidiasis-in-critically-ill-patients-by-analysing-the-integrated-process
#11
Rafael Zaragoza, Ricard Ferrer, Pedro Llinares, Emilio Maseda, Alejandro Rodríguez, Santiago Grau, Guillermo Quindós
BACKGROUND: A high quality integrated process in the clinical setting of non-neutropenic critically ill patients at risk for invasive candidiasis is a necessary tool to improve the management of these patients. AIMS: To identify the key points on invasive candidiasis in order to develop a set of recommendations with a high level of consensus required for the creation of a total quality integrated process for the management of non-neutropenic critically ill patients at risk of invasive candidiasis...
July 19, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28734684/factors-influencing-list-prices-for-radiologists-services
#12
Andrew B Rosenkrantz, Wenyi Wang, Arvind Vijayasarathi, Richard Duszak
PURPOSE: To identify factors associated with list price variation for radiologists' services. METHODS: The 2014 Medicare Physician and Other Supplier Public Use File was used to identify submitted charges ("list prices") and payments for radiologists' services (ie, not hospital service charges). Charge-to-payment ratios were computed for individual radiologists as a measure of excess charges. Numerous radiologist-level factors identifiable using publicly available data sets were explored...
July 20, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28734302/analytical-derivatives-of-the-individual-state-energies-in-ensemble-density-functional-theory-method-i-general-formalism
#13
Michael Filatov, Fang Liu, Todd J Martínez
The state-averaged (SA) spin restricted ensemble referenced Kohn-Sham (REKS) method and its state interaction (SI) extension, SI-SA-REKS, enable one to describe correctly the shape of the ground and excited potential energy surfaces of molecules undergoing bond breaking/bond formation reactions including features such as conical intersections crucial for theoretical modeling of non-adiabatic reactions. Until recently, application of the SA-REKS and SI-SA-REKS methods to modeling the dynamics of such reactions was obstructed due to the lack of the analytical energy derivatives...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28734295/estimating-the-intrinsic-limit-of-the-feller-peterson-dixon-composite-approach-when-applied-to-adiabatic-ionization-potentials-in-atoms-and-small-molecules
#14
David Feller
Benchmark adiabatic ionization potentials were obtained with the Feller-Peterson-Dixon (FPD) theoretical method for a collection of 48 atoms and small molecules. In previous studies, the FPD method demonstrated an ability to predict atomization energies (heats of formation) and electron affinities well within a 95% confidence level of ±1 kcal/mol. Large 1-particle expansions involving correlation consistent basis sets (up to aug-cc-pV8Z in many cases and aug-cc-pV9Z for some atoms) were chosen for the valence CCSD(T) starting point calculations...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28734285/extension-of-the-d3-dispersion-coefficient-model
#15
Eike Caldeweyher, Christoph Bannwarth, Stefan Grimme
A new model, termed D4, for the efficient computation of molecular dipole-dipole dispersion coefficients is presented. As in the related, well established D3 scheme, these are obtained as a sum of atom-in-molecule dispersion coefficients over atom pairs. Both models make use of dynamic polarizabilities obtained from first-principles time-dependent density functional theory calculations for atoms in different chemical environments employing fractional atomic coordination numbers for interpolation. Different from the D3 model, the coefficients are obtained on-the-fly by numerical Casimir-Polder integration of the dynamic, atomic polarizabilities α(iω)...
July 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28733264/the-impact-of-toxicities-on-first-year-outcomes-after-ex-vivo-cd34-selected-allogeneic-hematopoietic-cell-transplantation-in-adults-with-hematologic-malignancies
#16
Satyajit Kosuri, Diego Adrianzen Herrera, Michael Scordo, Gunjan L Shah, Christina Cho, Sean M Devlin, Molly A Maloy, Jimmy Nieves, Taylor Borrill, Dean C Carlow, Scott T Avecilla, Richard C Meagher, Richard J O'Reilly, Esperanza B Papadopoulos, Ann A Jakubowski, Guenther Koehne, Boglarka Gyurkocza, Hugo Castro-Malaspina, Brian C Shaffer, Roni Tamari, Sergio A Giralt, Miguel-Angel Perales
Factors that impact first year morbidity and mortality in adults undergoing myeloablative allogeneic hematopoietic cell transplantation with ex-vivo CD34+ selection have not been previously reported. We assessed all toxicities ≥ grade 3 from the start of conditioning to date of death, relapse, or last contact in 200 patients during the first year post-transplantation, identifying 1885 individual toxicities among 17 organ-based toxicity groups. The most prevalent toxicities in the 1(st) year were of infectious, metabolic, hematologic, oral/GI, hepatic, cardiac and pulmonary etiologies...
July 18, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28732486/the-development-of-a-collective-quality-system-challenges-and-lessons-learned-a-qualitative-study
#17
EDITORIAL
Nienke Buwalda, Jozé Braspenning, Nynke van Dijk, Mechteld Visser
BACKGROUND: The ongoing professionalization of medical education means that quality systems (QSs) aimed at improving medical education also continuously have to improve. The aim of this paper is to describe the development of a collective QS for eight Dutch General Practitioner (GP) specialty training institutes to provide insights into the considerations that are involved in developing a QS in medical education. METHODS: Experts in the field of GP education and quality assurance developed the QS...
July 21, 2017: BMC Medical Education
https://www.readbyqxmd.com/read/28732402/characteristics-of-black-carbon-in-snow-from-laohugou-no-12-glacier-on-the-northern-tibetan-plateau
#18
Yulan Zhang, Shichang Kang, Chaoliu Li, Tanguang Gao, Zhiyuan Cong, Michael Sprenger, Yajun Liu, Xiaofei Li, Junming Guo, Mika Sillanpää, Kun Wang, Jizu Chen, Yang Li, Shiwei Sun
Black carbon (BC) emitted from the incomplete combustion of biomass and fossil fuel impacts the climate system, cryospheric change, and human health. This study documents black carbon deposition in snow from a benchmark glacier on the northern Tibetan Plateau. Significant seasonality of BC concentrations indicates different input or post-depositional processes. BC particles deposited in snow had a mass volume median diameter slightly larger than that of black carbon particles typically found in the atmosphere...
July 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28732230/maximum-likelihood-optimal-and-robust-support-vector-regression-with-lncosh-loss-function
#19
Omer Karal
In this paper, a novel and continuously differentiable convex loss function based on natural logarithm of hyperbolic cosine function, namely lncosh loss, is introduced to obtain Support Vector Regression (SVR) models which are optimal in the maximum likelihood sense for the hyper-secant error distributions. Most of the current regression models assume that the distribution of error is Gaussian, which corresponds to the squared loss function and has helpful analytical properties such as easy computation and analysis...
June 30, 2017: Neural Networks: the Official Journal of the International Neural Network Society
https://www.readbyqxmd.com/read/28731742/semiclassical-divide-and-conquer-method-for-spectroscopic-calculations-of-high-dimensional-molecular-systems
#20
Michele Ceotto, Giovanni Di Liberto, Riccardo Conte
A new semiclassical "divide-and-conquer" method is presented with the aim of demonstrating that quantum dynamics simulations of high dimensional molecular systems are doable. The method is first tested by calculating the quantum vibrational power spectra of water, methane, and benzene-three molecules of increasing dimensionality for which benchmark quantum results are available-and then applied to C_{60}, a system characterized by 174 vibrational degrees of freedom. Results show that the approach can accurately account for quantum anharmonicities, purely quantum features like overtones, and the removal of degeneracy when the molecular symmetry is broken...
July 7, 2017: Physical Review Letters
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