68 research outputs found
Davinci Goes to Bebras: A Study on the Problem Solving Ability of GPT-3
In this paper we study the problem-solving ability of the Large Language Model known as GPT-3 (codename DaVinci), by considering its performance in solving tasks proposed in the “Bebras International Challenge on Informatics and Computational Thinking”. In our experiment, GPT-3 was able to answer with a majority of correct answers about one third of the Bebras tasks we submitted to it. The linguistic fluency of GPT-3 is impressive and, at a first reading, its explanations sound coherent, on-topic and authoritative; however the answers it produced are in fact erratic and the explanations often questionable or plainly wrong. The tasks in which the system performs better are those that describe a procedure, asking to execute it on a specific instance of the problem. Tasks solvable with simple, one-step deductive reasoning are more likely to obtain better answers and explanations. Synthesis tasks, or tasks that require a more complex logical consistency get the most incorrect answers
Electronic structure of few-layer black phosphorus from -ARPES
Black phosphorus (BP) stands out among two-dimensional (2D) semiconductors
because of its high mobility and thickness dependent direct band gap. However,
the quasiparticle band structure of ultrathin BP has remained inaccessible to
experiment thus far. Here we use a recently developed laser-based micro-focus
angle resolved photoemission (-ARPES) system to establish the electronic
structure of 2-9 layer BP from experiment. Our measurements unveil ladders of
anisotropic, quantized subbands at energies that deviate from the scaling
observed in conventional semiconductor quantum wells. We quantify the
anisotropy of the effective masses and determine universal tight-binding
parameters which provide an accurate description of the electronic structure
for all thicknesses.Comment: Supporting Information available upon reques
Observation of flat moir\'e bands in twisted bilayer WSe
The recent observation of correlated phases in transition metal
dichalcogenide moir\'e systems at integer and fractional filling promises new
insight into metal-insulator transitions and the unusual states of matter that
can emerge near such transitions. Here, we combine real- and momentum-space
mapping techniques to study moir\'e superlattice effects in 57.4
twisted WSe (tWSe). Our data reveal a split-off flat band that derives
from the monolayer states. Using advanced data analysis, we directly
quantify the moir\'e potential from our data. We further demonstrate that the
global valence band maximum in tWSe is close in energy to this flat band
but derives from the monolayer K-states which show weaker superlattice effects.
These results constrain theoretical models and open the perspective that
-valley flat bands might be involved in the correlated physics of
twisted WSe
Prevalence of hepatic steatosis in patients with type 2 diabetes and response to glucose-lowering treatments. A multicenter retrospective study in Italian specialist care
Type 2 diabetes (T2D) is a risk factor for metabolic dysfunction-associated fatty liver disease (MAFLD), which is becoming the commonest cause of chronic liver disease worldwide. We estimated MAFLD prevalence among patients with T2D using the hepatic steatosis index (HSI) and validated it against liver ultrasound. We also examined whether glucose-lowering medications (GLM) beneficially affected HSI
Similar effectiveness of dapagliflozin and GLP-1 receptor agonists concerning combined endpoints in routine clinical practice: A multicentre retrospective study
Aims According to cardiovascular outcome trials, some sodium-glucose contransporter-2 inhibitors (SGLT2i) and glucagon-like peptide-1 receptor agonists (GLP-1RA) are recommended for secondary cardiovascular prevention in type 2 diabetes (T2D). In this real-world study, we compared the simultaneous reductions in HbA1c, body weight and systolic blood pressure after initiation of dapagliflozin or GLP-1RA as second or a more advanced line of therapy. Materials and methods DARWIN-T2D was a retrospective multi-centre study conducted at diabetes specialist clinics in Italy that compared T2D patients who initiated dapagliflozin or GLP-1RA (exenatide once weekly or liraglutide). Data were collected at baseline and at the first follow-up visit after 3 to 12 months. The primary endpoint was the proportion of patients achieving a simultaneous reduction in HbA1c, body weight and systolic blood pressure. To reduce confounding, we used multivariable adjustment (MVA) or propensity score matching (PSM). Results Totals of 473 patients initiating dapagliflozin and 336 patients initiating GLP-1RA were included. The two groups differed in age, diabetes duration, HbA1c, weight and concomitant medications. The median follow-up was 6 months in both groups. Using MVA or PSM, the primary endpoint was observed in 30% to 32% of patients, with no difference between groups. Simultaneous reduction of HbA1c, BP and SBP by specific threshold, as well as achievement of final goals, did not differ between groups. GLP-1RA reduced HbA1c by 0.3% more than the reduction achieved with dapagliflozin. Conclusion In routine specialist care, initiation of dapagliflozin can be as effective as initiation of a GLP-1RA for attainment of combined risk factor goals
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Letter from Anna Morpurgo to Emmett Bennett Jr., November 17, 1959
Morpurgo inquires about missing pages in the latest issue of Nestor.Classic
L' origine sospetta come caratteristica della cultura polacca
L'articolo tratta dei pregiudizi della cultura polacca in merito all'ebraismo
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