Read by QxMD icon Read

Transitive reasoning

Bin Peng, Wei Zheng, Jiantao Qin, Wanli Zhang
Two-dimensional transitional metal dichalcogenide (TMDC) field-effect transistors (FETs) are proposed to be promising for devices scaling beyond silicon-based devices. We explore the different effective mass and bandgap of the channel materials and figure out the possible candidates for high-performance devices with the gate length at 5 nm and below by solving the quantum transport equation self-constantly with the Poisson equation. We find that out of the 14 compounds, MoS₂, MoSe₂, and MoTe₂ may be used in the devices to achieve a good subthreshold swing and a reasonable current ON-OFF ratio and delay...
March 15, 2018: Materials
Lijun Fu, Xueli Mu, Baiqing Li
A new method for the syn-dichlorination of alkenes at room temperature has been proposed by Denmark et al. The method uses diselenide (PhSeSePh) as the precatalyst, benzyltriethylammonium chloride (BnEt3 NCl) as the source of chlorine, and an N-fluoropyridinium salt as the oxidant to recover the catalyst. This approach has achieved exquisite diastereocontrol on a number of alkene substrates. In this paper, we report the results of DFT calculations we performed to study the mechanism of this reaction. We were able to identify a reasonable reaction path, including the intermediate and transition-state structures...
March 13, 2018: Journal of Molecular Modeling
Peng-Fei Wang, Hu-Rong Yao, Xin-Yu Liu, Ya-Xia Yin, Jie-Nan Zhang, Yuren Wen, Xiqian Yu, Lin Gu, Yu-Guo Guo
As one of the most fascinating cathode candidates for Na-ion batteries (NIBs), P2-type Na layered oxides usually exhibit various single-phase domains accompanied by different Na+ /vacancy-ordered superstructures, depending on the Na concentration when explored in a limited electrochemical window. Therefore, their Na+ kinetics and cycling stability at high rates are subjected to these superstructures, incurring obvious voltage plateaus in the electrochemical profiles and insufficient battery performance as cathode materials for NIBs...
March 2018: Science Advances
Kevin F Elwood, Robert W Wong
PURPOSE: To describe a case of transient, partial, central retinal artery occlusion with paracentral acute middle maculopathy optical coherence tomography presentation in a young healthy patient after ingestion of the synephrine-containing supplement, Havok. METHODS: Retrospective case report with fundus photography, fluorescein angiography, and optical coherence tomography. RESULTS: A 20-year-old man presented with severe acute vision loss in the right eye...
March 8, 2018: Retinal Cases & Brief Reports
Jort de Vreeze, Christina Matschke, Ulrike Cress
Students from low social-class background often struggle to adapt to university. Previous research shows that perceived incompatibility between social-class background identity and student identity is one reason, but little is known about the underlying causes of identity incompatibility. In three studies, we expected and found that students with low subjective social-class background perceived their values differently from other students, but also differently from people back home, and both increased identity incompatibility...
March 12, 2018: British Journal of Social Psychology
Ildiko Tombor, Eleni Vangeli, Robert West, Lion Shahab
BACKGROUND: Understanding how people transition between phases of not making a quit attempt to stopping smoking successfully is important in order to optimize interventions. This study aimed to explore differences in attitudes towards smoking and quitting among smokers and ex-smokers. METHODS: Adult (age 18 and over) successful (n = 8), unsuccessful (n = 8) and never quitters (n = 7) were recruited through stop-smoking services in England. Semi-structured interviews were conducted and data were analysed using framework analysis...
2018: Journal of Substance Use
Mohie E M Zayed, Reda M El-Shishtawy, Shaaban A Elroby, Khalid O Al-Footy, Zahra M Al-Amshany
A set of different donor-π-acceptor compounds having dicyanovinyl as the acceptor and aryl moieties as donors were synthesized by Knoevenagel condensation. The UV-visible absorption and fluorescence spectra were investigated in different solvents. The optical band gab energy (Eg) was linearly correlated with the Hammett resonance effect of the donor to reveal that the higher the value of Hammett resonance effect of a donor, the lower the Eg of the molecule. The photophysical data revealed that compounds M4-M6 are typical molecular rotors with fluorescence due to twisted intramolecular charge transfer...
March 9, 2018: Chemistry Central Journal
Paul Boes, Henrik Wilming, Jens Eisert, Rodrigo Gallego
Maximum-entropy ensembles are key primitives in statistical mechanics. Several approaches have been developed in order to justify the use of these ensembles in statistical descriptions. However, there is still no full consensus on the precise reasoning justifying the use of such ensembles. In this work, we provide an approach to derive maximum-entropy ensembles, taking a strictly operational perspective. We investigate the set of possible transitions that a system can undergo together with an environment, when one only has partial information about the system and its environment...
March 9, 2018: Nature Communications
Sven-Martin Schlaffer, Michael Buchfelder, Robert Stoehr, Rolf Buslei, Annett Hölsken
A 6-year old patient presented with an intra and suprasellar cystic lesion accompanied with impairment of the hypothalamic-pituitary axis and partial hypopituitarism. The most likely cause of sellar lesions in this age group are adamantinomatous craniopharyngioma (adaCP) or Rathke´s cleft cysts (RCCs). AdaCP are characterized by CTNNB1 mutations accompanied with aberrant nuclear beta-catenin expression. RCC show neither nuclear beta-catenin expression nor BRAF mutation. The latter is a hallmark of papillary craniopharyngiomas (papCP) that exhibit remarkable histological similarity with metaplasia of RCC...
2018: Frontiers in Genetics
I Bragard, M Guillaume, A Ghuysen, J C Servotte, I Ortiz, B Pétré
The transformations of the health system and the preferences of the patients themselves have led healthcare professionals to rethink the place and role of the patient in the healthcare system, putting the caregivercare relationship and communication at the heart of public health issues. The literature shows that empathic communication is associated with better adherence to treatment, better patient satisfaction and less litigation. However, the initial training programs of health professionals are little oriented towards this field...
February 2018: Revue Médicale de Liège
Hyemin Lee, Jooyoung Park, Bokyoung Choi, Horim Yi, Seung-Sup Kim
Objectives: Previous literature has documented that transgender people may encounter barriers when they use transition-related healthcare services. This study aims to investigate the experiences of transition-related healthcare and the barriers to those services among transgender adults in South Korea. Methods: In 2017, we conducted a nationwide cross-sectional survey of 278 transgender adults in South Korea. We assessed the prevalence of transition-related healthcare such as Gender Identity Disorder (GID) diagnosis, hormone therapy, and sex reassignment surgery...
February 27, 2018: Epidemiology and Health
A Y Yegorov, S A Potekhin
The heat denaturation of lysozyme has been studied by high-pressure differential scanning microcalorimetry. It has been demonstrated that an increase in pressure has different influence on denaturation temperature and enthalpy at different pH values. It has been established that the pressure increase has no appreciable effect on the transition cooperativity. The experimental data have been analyzed using an equilibrium model of transition between two states. Partial molar volume changes accompanying the denaturation as well as isothermal compressibility and thermal expansibility coefficients have been assessed...
January 2018: Molekuliarnaia Biologiia
Tae Soo Kang, Byung Soo Ko, Stavros G Drakos, Josef Stehlik, Steven I Bott, Antigone Koliopoulou, Joseph E Tonna, Megan E Bowen, Kathleen Stoddard, Craig H Selzman, Stephen H McKellar
BACKGROUND: Acute mechanical circulatory support (aMCS) can be a lifesaving therapy for patients with refractory cardiogenic shock. As device safety and technology improve, so will the ability to extend aMCS to patients at remote hospitals. The Intermountain West is unique because of the large geographical area, making transport of critically ill patients a logistical challenge. METHODS: We reviewed our experience of transporting patients in cardiogenic shock over long distances who had already been placed on aMCS: Impella and extracorporeal membrane oxygenator devices...
April 2018: Journal of Surgical Research
Jinmyung Jung, Mijin Kwon, Sunghwa Bae, Soorin Yim, Doheon Lee
BACKGROUND: Muscle atrophy, an involuntary loss of muscle mass, is involved in various diseases and sometimes leads to mortality. However, therapeutics for muscle atrophy thus far have had limited effects. Here, we present a new approach for therapeutic target prediction using Petri net simulation of the status of phosphorylation, with a reasonable assumption that the recovery of abnormally phosphorylated proteins can be a treatment for muscle atrophy. RESULTS: The Petri net model was employed to simulate phosphorylation status in three states, i...
March 5, 2018: BMC Systems Biology
Céleste A Reiss, Jan B van Mechelen, Kees Goubitz, René Peschar
Paracetamol [N-(4-hydroxyphenyl)acetamide, C8 H9 NO2 ] has several polymorphs, just like many other drugs. The most stable polymorphs, denoted Forms I and II, can be obtained easily and their crystal structures are known. Crystals of the orthorhombic, less stable, room-temperature Form III are difficult to grow; they need a special recipe to crystallize and suffer from severe preferred orientation. A crystal structure model of Form III has been proposed and solved from a combination of structure prediction and powder X-ray diffraction (PXRD) [Perrin et al...
March 1, 2018: Acta Crystallographica. Section C, Structural Chemistry
Rosemary L Hopcroft
Fitness is always relative to the fitness of others in the group or breeding population. Even in very low-fertility societies, individual fitness as measured by the share of genes in subsequent generations may still be maximized. Further, sexual selection theory from evolutionary biology suggests that the relationship between status and fertility will differ for males and females. For this reason it is important to examine the relationship between status and fertility separately for males and females-something few demographic studies of fertility do...
March 5, 2018: Journal of Biosocial Science
I B Shiroky, O V Gendelman
We address the problem of transition front propagation in chains with a bi-stable nondegenerate on-site potential and a nonlinear gradient coupling. For generic nonlinear coupling, one encounters a special regime of transitions, characterized by extremely narrow fronts, far supersonic velocities of the front propagation, and long waves in the oscillatory tail. This regime can be qualitatively associated with a shock wave. The front propagation can be described with the help of a simple reduced-order model; the latter delivers a kinetic law, which is almost not sensitive to the fine details of the on-site potential...
February 2018: Chaos
Omar Mubin, Mudassar Arsalan, Abdullah Al Mahmud
Academic conferences offer numerous submission tracks to support the inclusion of a variety of researchers and topics. Work in progress papers are one such submission type where authors present preliminary results in a poster session. They have recently gained popularity in the area of Human Computer Interaction (HCI) as a relatively easier pathway to attending the conference due to their higher acceptance rate as compared to the main tracks. However, it is not clear if these work in progress papers are further extended or transitioned into more complete and thorough full papers or are simply one-off pieces of research...
2018: Scientometrics
Jana C Vamosi, Susana Magallón, Itay Mayrose, Sarah P Otto, Hervé Sauquet
Species diversity is remarkably unevenly distributed among flowering plant lineages. Despite a growing toolbox of research methods, the reasons underlying this patchy pattern have continued to perplex plant biologists for the past two decades. In this review, we examine the present understanding of transitions in flowering plant evolution that have been proposed to influence speciation and extinction. In particular, ploidy changes, transitions between tropical and nontropical biomes, and shifts in floral form have received attention and have offered some surprises in terms of which factors influence speciation and extinction rates...
February 28, 2018: Annual Review of Plant Biology
Jay G Berry, James C Gay, Karen Joynt Maddox, Eric A Coleman, Emily M Bucholz, Margaret R O'Neill, Kevin Blaine, Matthew Hall
OBJECTIVE: To assess trends in and risk factors for readmission to hospital across the age continuum. DESIGN: Retrospective analysis. SETTING AND PARTICIPANTS: 31 729 762 index hospital admissions for all conditions in 2013 from the US Agency for Healthcare Research and Quality Nationwide Readmissions Database. MAIN OUTCOME MEASURE: 30 day, all cause, unplanned hospital readmissions. Odds of readmission were compared by patients' age in one year epochs with logistic regression, accounting for sex, payer, length of stay, discharge disposition, number of chronic conditions, reason for and severity of admission, and data clustering by hospital...
February 27, 2018: BMJ: British Medical Journal
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"