keyword
MENU ▼
Read by QxMD icon Read
search

"Approach to"

keyword
https://www.readbyqxmd.com/read/28454477/in-situ-analysis-of-oxygen-vacancies-and-band-alignment-in-hfo2-tin-structure-for-cmos-applications
#1
Da-Peng Xu, Lin-Jie Yu, Xu-Dong Chen, Lin Chen, Qing-Qing Sun, Hao Zhu, Hong-Liang Lu, Peng Zhou, Shi-Jin Ding, David Wei Zhang
The density of oxygen vacancies characterization in high-k/metal gate is significant for semiconductor device fabrication. In this work, a new approach was demonstrated to detect the density of oxygen vacancies by in situ x-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) measurement. Moreover, the band alignment of the structure with optical band gap measured by spectroscopic ellipsometry (SE) and valence band offset by UPS were reported. The specific areal density of oxygen vacancies in high-k dielectric of HfO2/TiN was obtained by fitting the experiment data to be 8...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28454218/stereotactic-body-radiation-therapy-for-oligoprogression-of-metastatic-disease-from-gastrointestinal-cancers-a-novel-approach-to-extend-chemotherapy-efficacy
#2
Justin Wray, Rana Fawzi Hawamdeh, Nalini Hasija, Roi Dagan, Anamaria R Yeung, Judith L Lightsey, Paul Okunieff, Karen C Daily, Thomas J George, Robert A Zlotecki, Jose Trevino, Long H Dang
Chemotherapy and targeted therapies are effective palliative options for numerous unresectable or metastatic cancers. However, treatment resistance inevitably develops leading to mortality. In a subset of patients, systemic therapy appears to control the majority of tumors leaving 5 or less to progress, a phenomenon described as oligoprogression. Reasoning that the majority of lesions remain responsive to ongoing systemic chemotherapy, we hypothesized that local treatment of the progressing lesions would confer a benefit...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454168/laser-waveform-control-of-extreme-ultraviolet-high-harmonics-from-solids
#3
Yong Sing You, Mengxi Wu, Yanchun Yin, Andrew Chew, Xiaoming Ren, Shima Gholam-Mirzaei, Dana A Browne, Michael Chini, Zenghu Chang, Kenneth J Schafer, Mette B Gaarde, Shambhu Ghimire
Solid-state high-harmonic sources offer the possibility of compact, high-repetition-rate attosecond light emitters. However, the time structure of high harmonics must be characterized at the sub-cycle level. We use strong two-cycle laser pulses to directly control the time-dependent nonlinear current in single-crystal MgO, leading to the generation of extreme ultraviolet harmonics. We find that harmonics are delayed with respect to each other, yielding an atto-chirp, the value of which depends on the laser field strength...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454162/three-dimensional-electromagnetic-gaussian-schell-model-sources
#4
Olga Korotkova, Lutful Ahad, Tero Setälä
We introduce three-dimensional (3D) stationary, electromagnetic Gaussian Schell-model (GSM) sources in the space-frequency domain and derive the realizability conditions that the source parameters must obey. In particular, we extend to 3D GSM sources two approaches to the realizability conditions presented previously for beam-like GSM sources. The results are of interest in the analysis and synthesis of tunable non-paraxial, partially coherent, partially polarized light fields.
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454150/selective-propagation-and-beam-splitting-of-surface-plasmons-on-metallic-nanodisk-chains
#5
Yuhui Hu, Di Zhao, Zhenghan Wang, Fei Chen, Xiang Xiong, Ruwen Peng, Mu Wang
Manipulating the propagation of surface plasmons (SPs) on a nanoscale is a fundamental issue of nanophotonics. By using focused electron beam, SPs can be excited with high spatial accuracy. Here we report on the propagation of SPs on a chain of gold nanodisks with cathodoluminescence (CL) spectroscopy. Experimental evidence for the propagation of SPs excited by the focused electron beam is demonstrated. The wavelength of the transmitted SPs depends on the geometrical parameters of the nanodisk chain. Furthermore, we design and fabricate a beam splitter, which selectively transmits SPs of certain wavelengths to a specific direction...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454048/antibacterial-activity-of-biochemically-capped-iron-oxide-nanoparticles-a-view-towards-green-chemistry
#6
Rabia Irshad, Kamran Tahir, Baoshan Li, Aftab Ahmad, Azka R Siddiqui, Sadia Nazir
A green approach to fabricate nanoparticles has been evolved as a revolutionary discipline. Eco-compatible reaction set ups, use of non-toxic materials and production of highly active biological and photocatalytic products are few benefits of this greener approach. Here, we introduce a green method to synthesize Fe oxide NPs using Punica granatum peel extract. The formation of Fe oxide NPs was optimized using different concentrations of peel extract (20mL, 40mL and 60mL) to achieve small size and better morphology...
April 19, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28453986/facilitating-smallholder-tree-farming-in-fragmented-tropical-landscapes-challenges-and-potentials-for-sustainable-land-management
#7
Syed Ajijur Rahman, Terry Sunderland, James M Roshetko, John Robert Healey
Under changing land use in tropical Asia, there is evidence of forest product diversification through implementation of tree-based farming by smallholders. This paper assesses in two locations, West Java, Indonesia and eastern Bangladesh, current land use conditions from the perspective of smallholder farmers, the factors that facilitate their adoption of tree farming, and the potential of landscape-scale approaches to foster sustainable land management. Data were collected through rapid rural appraisals, focus group discussions, field observations, semi-structured interviews of farm households and key informant interviews of state agricultural officers...
April 25, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28453981/facile-synthesis-of-flower-like-ag3vo4-bi2wo6-heterojunction-with-enhanced-visible-light-photocatalytic-activity
#8
Shijie Li, Shiwei Hu, Wei Jiang, Yu Liu, Jianshe Liu, Zhaohui Wang
Constructing novel semiconductor heterojunctions is one of the most significant approaches to improving the photocatalytic performance of a photocatalyst. Herein, the Ag3VO4/Bi2WO6 heterojunction was prepared through in-situ anchoring Ag3VO4 nanoparticles (size: ∼21nm) on the surface of Bi2WO6 microflowers (diameter: 2.5-4.5μm) by a facile deposition route. The photocatalytic activity of these heterojunctions were studied by decomposing cationic dye rhodamine B (RhB), anionic dye methyl orange (MO) and neutral para-chlorophenol (4-CP) under visible light irradiation (λ>400nm)...
April 20, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28453946/a-dermatologist-s-approach-to-genitourinary-syndrome-of-menopause
#9
Matthew Hum, Marlene Dytoc
BACKGROUND: Genitourinary syndrome of menopause (GSM) is a debilitating condition caused by hypoestrogenism that presents with vaginal dryness and dyspareunia as well as other genital, sexual, and urinary symptoms. Previously known as atrophic vaginitis, the term GSM is now used. OBJECTIVE: To help familiarise dermatologists with diagnosing and managing GSM. METHODS: In total, 218 articles were identified and reviewed by 2 independent authors using PubMed...
April 1, 2017: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28453945/an-approach-to-reconciling-competing-ethical-principles-in-aggregating-heterogeneous-health-preferences
#10
Barry Dewitt, Alexander Davis, Baruch Fischhoff, Janel Hanmer
BACKGROUND: Health-related quality of life (HRQL) scores are used extensively to quantify the effectiveness of medical interventions. Societal preference-based HRQL scores aim to produce societal valuations of health by aggregating valuations from individuals in the general population, where each aggregation procedure embodies different ethical principles, as explained in social choice theory. METHODS: Using the Health Utilities Index as an exemplar, we evaluate societal preference-based HRQL measures in the social choice theory framework...
April 1, 2017: Medical Decision Making: An International Journal of the Society for Medical Decision Making
https://www.readbyqxmd.com/read/28453887/self-management-strategies-used-by-head-and-neck-cancer-survivors-following-completion-of-primary-treatment-a-directed-content-analysis
#11
Simon Dunne, Orla Mooney, Laura Coffey, Linda Sharp, Aileen Timmons, Deirdre Desmond, Rachael Gooberman-Hill, Eleanor O'Sullivan, Ivan Keogh, Conrad Timon, Pamela Gallagher
OBJECTIVE: Head & Neck Cancer (HNC) survivors encounter unique challenges following treatment. This study aimed to identify self-management strategies that HNC survivors use to overcome these post-treatment challenges. METHODS: Twenty-seven individuals from four designated cancer centres in Ireland were interviewed about self-management strategies that helped them overcome challenges following HNC treatment. Interviews were audio-recorded, transcribed and analysed using directed content analysis...
April 28, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28453881/effect-of-an-acute-exercise-bout-on-immediate-post-exercise-irisin-concentration-in-adults-a-meta-analysis
#12
REVIEW
Jill Fox, Brittany V Rioux, Eric D B Goulet, Neil M Johanssen, Damon L Swift, Danielle R Bouchard, Hal Loewen, Martin Sénéchal
BACKGROUND: Irisin is a recently discovered myokine that increases adipocyte metabolism, induces further "browning" of white adipose tissue, and enhance glucose metabolism. No study has ever determined how an acute bout of exercise impacts immediate post-exercise irisin concentration using a meta-analytic approach. OBJECTIVE: To determine the impact of an acute bout of exercise on the magnitude of post-exercise irisin concentration in adults using meta-analytic procedures...
April 28, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28453778/exploring-a-causal-role-of-dna-methylation-in-the-relationship-between-maternal-vitamin-b12-during-pregnancy-and-child-s-iq-at-age-8-cognitive-performance-and-educational-attainment-a-two-step-mendelian-randomization-study
#13
Doretta Caramaschi, Gemma C Sharp, Ellen A Nohr, Katie Berryman, Sarah J Lewis, George Davey Smith, Caroline L Relton
An adequate intake of vitamin B12 during pregnancy plays an important role in offspring neurodevelopment, potentially via epigenetic processes. We used a two-step Mendelian randomization approach to assess whether DNA methylation plays a mediating and causal role in associations between maternal vitamin B12 status and offspring's cognition. Firstly, we estimated the causal effect of maternal vitamin B12 levels on cord blood DNA methylation using the maternal FUT2 genotypes rs492602:A>G and rs1047781:A>T as proxies for circulating vitamin B12 levels in the Avon Longitudinal Study of Parents and Children (ALSPAC) and we tested the observed associations in a replication cohort...
April 27, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28453681/sphinx-merging-knowledge-based-and-ab-initio-approaches-to-improve-protein-loop-prediction
#14
Claire Marks, Jaroslaw Nowak, Stefan Klostermann, Guy Georges, James Dunbar, Jiye Shi, Sebastian Kelm, Charlotte M Deane
Motivation: Loops are often vital for protein function, however, their irregular structures make them difficult to model accurately. Current loop modelling algorithms can mostly be divided into two categories: knowledge-based, where databases of fragments are searched to find suitable conformations and ab initio, where conformations are generated computationally. Existing knowledge-based methods only use fragments that are the same length as the target, even though loops of slightly different lengths may adopt similar conformations...
May 1, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28453672/primerize-2d-automated-primer-design-for-rna-multidimensional-chemical-mapping
#15
Siqi Tian, Rhiju Das
Summary: Rapid RNA synthesis of comprehensive single mutant libraries and targeted multiple mutant libraries is enabling new multidimensional chemical approaches to solve RNA structures. PCR assembly of DNA templates and in vitro transcription allow synthesis and purification of hundreds of RNA mutants in a cost-effective manner, with sharing of primers across constructs allowing significant reductions in expense. However, these protocols require organization of primer locations across numerous 96 well plates and guidance for pipetting, non-trivial tasks for which informatics and visualization tools can prevent costly errors...
May 1, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28453646/protecting-confidentiality-in-cancer-registry-data-with-geographic-identifiers
#16
Mandi Yu, Jerome Phillip Reiter, Li Zhu, Benmei Liu, Kathleen A Cronin, Eric J Rocky Feuer
The National Cancer Institute's Surveillance, Epidemiology, and End Results Program releases research files of cancer registry data. These files include geography at the county level, but no finer. Access to finer geography, such as tract identifiers, would enable richer analyses, for example, examination of health disparities across neighborhoods. To date, tract identifiers are left off the research files because they could compromise the confidentiality of patients' identities. We present an approach to include tract identifiers based on multiply-imputed, synthetic data...
April 27, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28453626/protocol-to-monitor-trade-agreement-food-related-aspects-the-fiji-case-study
#17
Amerita Ravuvu, Sharon Friel, Anne Marie Thow, Wendy Snowdon, Jillian Wate
Despite the growing rates of obesity and diet-related non-communicable diseases, globally, public health attention has only relatively recently turned to the links between trade agreements and the nutritional risks associated with it. Specific trade agreements appear to have played an influential role in the volume and types of foods entering different countries, yet there is currently no systematic and objective monitoring of trade agreements for their impacts on food environments. Recently, INFORMAS was set up to monitor and benchmark food environments, government policies and private sector actions within countries and globally...
April 26, 2017: Health Promotion International
https://www.readbyqxmd.com/read/28453624/inferring-rates-and-length-distributions-of-indels-using-approximate-bayesian-computation
#18
Eli Levy Karin, Dafna Shkedy, Haim Ashkenazy, Reed A Cartwright, Tal Pupko
The most common evolutionary events at the molecular level are single-base substitutions, and insertions and deletions of short DNA segments (indels). A large body of research has been devoted to develop probabilistic substitution models and to infer their parameters using likelihood and Bayesian approaches. In contrast, relatively little has been done to model indel dynamics, probably due to the difficulty in writing explicit likelihood functions. Here, we contribute to the effort of modeling indel dynamics by presenting SpartaABC, an approximate Bayesian computation (ABC) approach to infer indel parameters from sequence data (either aligned or unaligned)...
April 26, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28453609/invited-commentary-searching-for-the-perfect-measure-of-diastolic-dysfunction-a-futile-exercise
#19
Ambarish Pandey, Jarett D Berry
Heart failure with preserved ejection fraction (HFpEF) is common, recalcitrant to treatment, and associated with poor outcomes. Diastolic dysfunction (DD) is an independent predictor of HFpEF risk, associated clinical manifestations, and long-term outcomes. However, the usefulness of diastolic function assessment is limited by the heterogeneity in the existing definitions of DD. In this issue of the Journal, Rasmussen-Torvik et al. (Am J Epidemiol. 2017;000(00):000-000) have highlighted this problem by evaluating the prevalence and concordance of 4 established definitions of DD in the Coronary Artery Risk Development in Young Adults (CARDIA) cohort...
April 27, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28453588/-diverticular-disease-myths-and-realities
#20
Daniela Fluxá, Rodrigo Quera
Diverticulosis and diverticular disease of the colon are common conditions in Western countries. The incidence and prevalence of these diseases are increasing and becoming significant for health systems. A growing body of knowledge is shifting the paradigm of the pathogenesis and treatment of diverticular disease. Low-grade inflammation, altered intestinal microbiota, visceral hypersensitivity, and abnormal colonic motility have been identified as factors leading to diverticular disease. The risk of developing diverticulitis among individuals with diverticulosis is lower than 10 to 25%...
February 2017: Revista Médica de Chile
keyword
keyword
114161
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"