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https://www.readbyqxmd.com/read/28549375/interfacial-electrical-and-band-alignment-characteristics-of-hfo2-ge-stacks-with-in-situ-formed-sio2-interlayer-by-plasma-enhanced-atomic-layer-deposition
#1
Yan-Qiang Cao, Bing Wu, Di Wu, Ai-Dong Li
In situ-formed SiO2 was introduced into HfO2 gate dielectrics on Ge substrate as interlayer by plasma-enhanced atomic layer deposition (PEALD). The interfacial, electrical, and band alignment characteristics of the HfO2/SiO2 high-k gate dielectric stacks on Ge have been well investigated. It has been demonstrated that Si-O-Ge interlayer is formed on Ge surface during the in situ PEALD SiO2 deposition process. This interlayer shows fantastic thermal stability during annealing without obvious Hf-silicates formation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28549336/evaluation-of-a-new-random-access-hbv-dna-molecular-assay-the-veris-hbv-assay
#2
Slim Fourati, Dominique Challine, Jean-Dominique Poveda, Syria Laperche, Sandrine Rallier, Jean-Michel Pawlotsky, Stéphane Chevaliez
BACKGROUND: Detection and quantification of HBV DNA are essential to diagnose chronic HBV infection, monitor the virological response to treatment and the possible selection of resistant viruses in order to tailor therapy. The VERIS/MDx System HBV Assay is a random-access system that quantifies HBV DNA in clinical samples using unique single sample and reagent access during the workflow process without the need to reload other tests and delivers results within 1.2h following sampling...
May 17, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28549247/individuals-with-clinically-significant-insomnia-symptoms-are-characterised-by-a-negative-sleep-related-expectancy-bias-results-from-a-cognitive-experimental-assessment
#3
Hannah Courtauld, Lies Notebaert, Bronwyn Milkins, Simon D Kyle, Patrick J F Clarke
Cognitive models of insomnia consistently suggest that negative expectations regarding the consequences of poor sleep contribute to the maintenance of insomnia. To date, however, no research has sought to determine whether insomnia is indeed characterised by such a negative sleep-related expectancy bias, using objective cognitive assessment tasks which are more immune to response biases than questionnaire assessments. Therefore, the current study employed a reaction-time task assessing biased expectations among a group with clinically significant insomnia symptoms (n = 30) and a low insomnia symptoms group (n = 40)...
May 17, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28549175/selfing-in-haploid-plants-and-efficacy-of-selection-codon-usage-bias-in-the-model-moss-physcomitrella-patens
#4
Péter Szövényi, Kristian K Ullrich, Stefan A Rensing, Daniel Lang, Nico van Gessel, Hans K Stenøien, Elena Conti, Ralf Reski
Long term reduction in effective population size will lead to major shift in genome evolution. In particular, when effective population size is small, genetic drift becomes dominant over natural selection. The onset of self-fertilization is one evolutionary event considerably reducing effective size of populations. Theory predicts that this reduction should be more dramatic in organisms capable for haploid than for diploid selfing. Although theoretically well-grounded, this assertion received mixed experimental support...
May 26, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28549138/precautionary-bias
#5
Vasiliy V Vlassov
No abstract text is available yet for this article.
June 1, 2017: European Journal of Public Health
https://www.readbyqxmd.com/read/28549039/paired-comparison-of-pd-l1-expression-on-cytologic-and-histologic-specimens-from-malignancies-in-the-lung-assessed-with-pd-l1-ihc-28-8pharmdx-and-pd-l1-ihc-22c3pharmdx
#6
Birgit G Skov, Torsten Skov
BACKGROUND: Programmed cell death ligand-1 (PD-L1) expression is a predictive biomarker for anti-PD-1 immunotherapy in non-small cell lung cancer. Different immunohistochemistry (IHC) assays have been developed on histologic material with different cutoffs for positivity. More than one third of the patients are diagnosed on cytology alone. We hypothesized that cytologic cell block material is suitable for PD-L1 analysis. MATERIALS AND METHODS: Eighty-six paired samples of malignancies from the lung where cytologic cell block and histologic material were available from the same lesion were stained with PD-L1 IHC 28-8pharmDx and PD-L1 IHC 22C3pharmDx...
May 25, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28549007/surgeon-experience-and-medicare-expenditures-for-laparoscopic-compared-to-open-colectomy
#7
Kyle H Sheetz, Andrew M Ibrahim, Scott E Regenbogen, Justin B Dimick
OBJECTIVE: To quantify the extent to which payments for laparoscopic and open colectomy are influenced by a surgeon's experience with laparoscopy. BACKGROUND: Numerous studies suggest that healthcare costs for laparoscopic colectomy are lower than open surgery. None have assessed the importance of surgeon experience on the relative financial benefits of laparoscopy. METHODS: We conducted a study of 182,852 national Medicare beneficiaries undergoing laparoscopic or open colectomy between 2010 and 2012...
May 25, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28548823/atmosphere-and-voltage-dependent-electronic-conductivity-of-oxide-ion-conducting-zr1-xyxo2-x-2-ceramics
#8
Marc Jovaní, Héctor Beltrán-Mir, Eloisa Cordoncillo, Anthony R West
Cubic, fluorite-structured solid solutions Zr1-xYxO2-x/2 (YSZ; x = 0.4-0.7) were prepared by sol-gel synthesis. Impedance measurements on pellets of 85% approximate density sintered at 1300 °C for 24 h showed strong evidence of oxide ion conduction with an inclined Warburg spike at low frequencies and capacitance values of ∼10(-6) F cm(-1) at 40 Hz. Arrhenius plots of total pellet conductivities were linear with activation energies of 1.4-1.56 eV. The conductivity decreased with x and was 2-4 orders of magnitude lower than that with optimized YSZ, x = 0...
May 26, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28548708/glucocerebrosidase-mutations-and-neuropsychiatric-phenotypes-in-parkinson-s-disease-and-lewy-body-dementias-review-and-meta-analyses
#9
REVIEW
Byron Creese, Emily Bell, Iskandar Johar, Paul Francis, Clive Ballard, Dag Aarsland
Heterozygous mutations in glucocerebrosidase gene (GBA) are a major genetic risk factor for Parkinson's disease (PD) and dementia with Lewy bodies (DLB). Recently, there has been a considerable focus on the relationship between GBA mutations and emergence of cognitive impairment and neuropsychiatric symptoms in these diseases. Here, we review the literature in this area, with a particular focus, including meta-analysis, on the key neuropsychiatric symptoms of cognitive impairment, psychosis, and depression in Parkinson's disease...
May 26, 2017: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
https://www.readbyqxmd.com/read/28548578/emotional-cognitive-and-behavioral-reactions-to-paranoid-symptoms-in-clinical-and-nonclinical-populations
#10
Célia Barreto Carvalho, Carolina da Motta, José Pinto-Gouveia, Ermelindo Manuel Bernardo Peixoto
BACKGROUND: Paranoia is a disruptive belief that can vary across a continuum, ranging from persecutory delusions presented in clinical settings to paranoid cognitions that are highly prevalent in the general population. The literature suggests that paranoid thoughts derive from the activation of a paranoid schema or information processing biases that can be sensitive to socially ambiguous stimuli and influence the processing of threatening situations. METHODS: Four groups (schizophrenic participants in active psychotic phases, n=61; stable participants in remission, n=30; participants' relatives, n=32; and, healthy controls, n=64) were assessed with self-report questionnaires to determine how the reactions to paranoia of clinical patients differ from healthy individuals...
2017: Clinical Schizophrenia & related Psychoses
https://www.readbyqxmd.com/read/28548454/corema-album-unbiased-dioecy-in-a-competitive-environment
#11
Ana Martins, Helena Freitas, Sofia Costa
1.Corema album is a dioecious coastal shrub. Dioecious plants growing in these resource-limited habitats may present spatial segregation of the sexes (SSS) or demographic biases because of the different reproductive effort between sexes. In these environments facilitation is a more common interaction between plants than competition. To assess factors determining the distribution of C. album male and female plants, we investigated the influence of habitat type (sand dunes and coastal woodlands), assessed the occurrence of SSS or demographic biases, and also a possible role of these shrubs as nurse plants...
May 26, 2017: Plant Biology
https://www.readbyqxmd.com/read/28548282/estimating-the-effect-of-immortal-time-bias-in-urologic-research-a-case-example-of-testosterone-replacement-therapy
#12
Christopher J D Wallis, Refik Saskin, Steven A Narod, Calvin Law, Girish S Kulkarni, Arun Seth, Robert K Nam
OBJECTIVE: To quantify the effect of immortal-time bias in an observational study examining the effect of cumulative testosterone exposure on mortality. SUBJECTS AND METHODS: We used a population-based matched cohort study of men aged 66 and older newly treated with testosterone replacement therapy and matched-controls from 2007-2012 in Ontario, Canada to quantify the effects of immortal-time bias. We used generalized estimating equations to determine the association between cumulative testosterone replacement therapy exposure and mortality...
May 26, 2017: BJU International
https://www.readbyqxmd.com/read/28548204/endovascular-treatment-for-ruptured-abdominal-aortic-aneurysm
#13
REVIEW
Stephen Badger, Rachel Forster, Paul H Blair, Peter Ellis, Frank Kee, Denis W Harkin
BACKGROUND: An abdominal aortic aneurysm (AAA) (pathological enlargement of the aorta) is a condition that can occur as a person ages. It is most commonly seen in men older than 65 years of age. Progressive aneurysm enlargement can lead to rupture and massive internal bleeding, which is fatal unless timely repair can be achieved. Despite improvements in perioperative care, mortality remains high (approximately 50%) after conventional open surgical repair. Endovascular aneurysm repair (EVAR), a minimally invasive technique, has been shown to reduce early morbidity and mortality as compared to conventional open surgery for planned AAA repair...
May 26, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28547949/association-between-stereotactic-radiotherapy-and-death-from-brain-metastases-of-epithelial-ovarian-cancer-a-gliwice-data-re-analysis-with-penalization
#14
Andrzej Tukiendorf, Jerzy Wydmański, Edyta Wolny-Rokicka
Background: Clinical datasets for epithelial ovarian cancer brain metastatic patients are usually small in size. When adequate case numbers are lacking, resulting estimates of regression coefficients may demonstrate bias. One of the direct approaches to reduce such sparse-data bias is based on penalized estimation. Methods: A re- analysis of formerly reported hazard ratios in diagnosed patients was performed using penalized Cox regression with a popular SAS package providing additional software codes for a statistical computational procedure...
April 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28547942/evaluation-of-a-skin-self-examination-programme-a-four-stage-recursive-model
#15
David Rowell, Kim Huong Nguyen, Peter Baade, Monika Janda
Background: Effective skin self-examination can enable early diagnosis and treatment of skin cancer, which otherwise could result in significant morbidity and mortality. We compare the effects of watching a DVD and reading printed materials on self skin examination. Methods: Longitudinal data from the Randomized Skin Awareness Trial were analysed (n=984). The control group were provided with written materials describing how to conduct effective skin self-examination. The intervention group received additional instruction from a DVD...
April 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28547782/due-to-potential-concerns-of-bias-and-conflicts-of-interest-regulatory-bodies-should-not-do-evaluation-methodology-research-related-to-their-regulatory-missions
#16
Dev P Chakraborty, Robert M Nishikawa, Colin G Orton
One of the major roles of regulatory bodies is to enforce rules and thus maintain standards. They also often do research related to their missions, some of which might be used to establish the standards they are regulating and how they should be evaluated. This has led some to believe that, due to potential concerns of bias and conflicts of interest, regulatory bodies should not do evaluation methodology research related to their regulatory missions. This is the claim that is debated in this month's Point/Counterpoint...
May 26, 2017: Medical Physics
https://www.readbyqxmd.com/read/28547777/your-act-is-worse-than-mine-perception-bias-in-revenge-situations
#17
Maartje Elshout, Rob M A Nelissen, Ilja van Beest
Theoretical reflections suggest that avengers and targets of revenge have self-serving perception biases when judging the severity of revenge acts and preceding offenses. Empirical research investigating such biases has so far focused on either the offense or the revenge act and may have confounded a perception bias with a situational selection bias (i.e., avengers and targets selecting different events in self-serving ways, so that there may be actual, as opposed to perceptual, differences in severity). The current research circumvents this shortcoming by empirically investigating this perception bias by assessing avengers' and targets' severity scores of both the offense and the revenge act, and comparing these scores with severity scores of independent raters...
May 26, 2017: Aggressive Behavior
https://www.readbyqxmd.com/read/28547760/blinded-review-of-archival-radical-prostatectomy-specimens-supports-that-contemporary-gleason-score-6-prostate-cancer-lacks-metastatic-potential
#18
Luciano A Nunez Bragayrac, Christine Murekeyisoni, Michael J Vacchio, Kristopher Attwood, Diana C Mehedint, James L Mohler, Gissou Azabdaftari, Bo Xu, Eric C Kauffman
BACKGROUND: Retrospective identification of Gleason pattern 4 in metastatic Gleason score 3 + 3 = 6 (GS6) radical prostatectomy (RP) specimens has suggested true GS6 prostate cancer (CaP) lacks metastatic potential. However, pathologist awareness of study design and metastasis outcomes at the time of RP review might have introduced upgrading bias. We used pathologist-blinded methodology for unbiased characterization of metastasis rates for contemporarily defined pathologic GS6 (pGS6) CaP...
May 26, 2017: Prostate
https://www.readbyqxmd.com/read/28547745/medical-students-and-professional-anatomists-do-not-perceive-gender-bias-within-imagery-featuring-anatomy
#19
Susan Morgan, Odile Plaisant, Baptiste Lignier, Bernard J Moxham
Previous studies suggest that, while both medical students and professional anatomists recognise the importance of gender issues and do not wish to associate with sexism, most are unaware of the possible negative aspects of sexism within anatomy (Morgan et al., 2014, 2016). To further investigate these issue, we provided second year medical students at Cardiff University (n=293) and at the University of Paris Descartes, Sorbonne Paris Cité (n= 142) and professional anatomists in Europe (n= 208) with a questionnaire inviting them to address the possibility that gender factors within anatomical imagery (both historical and contemporary) hinder the dispassionate representation of anatomy...
May 25, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28547680/the-influence-of-attention-on-value-integration
#20
Melina A Kunar, Derrick G Watson, Konstantinos Tsetsos, Nick Chater
People often have to make decisions based on many pieces of information. Previous work has found that people are able to integrate values presented in a rapid serial visual presentation (RSVP) stream to make informed judgements on the overall stream value (Tsetsos et al. Proceedings of the National Academy of Sciences of the United States of America, 109(24), 9659-9664, 2012). It is also well known that attentional mechanisms influence how people process information. However, it is unknown how attentional factors impact value judgements of integrated material...
May 25, 2017: Attention, Perception & Psychophysics
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