Search results for " Work"
showing 10 items of 2098 documents
Experimental characterization and comparison of TLIM performances with different primary winding connections
2017
Abstract This paper presents an experimental characterization and comparison of the performances achieved by a Tubular Linear Induction Motor (TLIM) prototype with different typologies of primary winding connections. More in detail, three different configurations have been considered, analyzed and discussed: full-pitch star, 5/6 shortened pitch star and 5/6 shortened pitch double star. For this purpose, an experimental test bench at the Sustainable Development and Energy Saving Laboratory (SDESLab), University of Palermo, Italy, has been set-up. The obtained results have allowed the identification of the best winding configuration for different applications intended for the motor. Moreover,…
Corrigendum to “Personal protective equipment and intensive care unit healthcare worker safety in the COVID-19 Era (PPE-SAFE): An international surve…
2021
The authors regret errors were present in the published article. Counts of some of the adverse events were erroneous. Changes to the text include. Last sentence of the abstract should read. Adverse effects of PPE included heat (1266, 51%), thirst (1174, 47%), pressure areas (1088, 44%), headaches (696, 28%), Inability to use the bathroom (661, 27%) and extreme exhaustion (492, 20%). All but pressure areas were associated with longer shift durations. Last sentence of the results section of the manuscript should read. All but pressure areas were associated with longer duration of shifts wearing PPE (Table 4). Table 1 the total number of community/urban type of hospital should read 740 instead…
On the Inner Product Predicate and a Generalization of Matching Vector Families
2018
Motivated by cryptographic applications such as predicate encryption, we consider the problem of representing an arbitrary predicate as the inner product predicate on two vectors. Concretely, fix a Boolean function $P$ and some modulus $q$. We are interested in encoding $x$ to $\vec x$ and $y$ to $\vec y$ so that $$P(x,y) = 1 \Longleftrightarrow \langle\vec x,\vec y\rangle= 0 \bmod q,$$ where the vectors should be as short as possible. This problem can also be viewed as a generalization of matching vector families, which corresponds to the equality predicate. Matching vector families have been used in the constructions of Ramsey graphs, private information retrieval (PIR) protocols, and mor…
Adaptive Lower Bound for Testing Monotonicity on the Line
2018
In the property testing model, the task is to distinguish objects possessing some property from the objects that are far from it. One of such properties is monotonicity, when the objects are functions from one poset to another. This is an active area of research. In this paper we study query complexity of $\epsilon$-testing monotonicity of a function $f\colon [n]\to[r]$. All our lower bounds are for adaptive two-sided testers. * We prove a nearly tight lower bound for this problem in terms of $r$. The bound is $\Omega(\frac{\log r}{\log \log r})$ when $\epsilon = 1/2$. No previous satisfactory lower bound in terms of $r$ was known. * We completely characterise query complexity of this probl…
Anti-powers in infinite words
2018
In combinatorics of words, a concatenation of $k$ consecutive equal blocks is called a power of order $k$. In this paper we take a different point of view and define an anti-power of order $k$ as a concatenation of $k$ consecutive pairwise distinct blocks of the same length. As a main result, we show that every infinite word contains powers of any order or anti-powers of any order. That is, the existence of powers or anti-powers is an unavoidable regularity. Indeed, we prove a stronger result, which relates the density of anti-powers to the existence of a factor that occurs with arbitrary exponent. As a consequence, we show that in every aperiodic uniformly recurrent word, anti-powers of ev…
The Fluted Fragment with Transitivity
2019
We study the satisfiability problem for the fluted fragment extended with transitive relations. We show that the logic enjoys the finite model property when only one transitive relation is available. On the other hand we show that the satisfiability problem is undecidable already for the two-variable fragment of the logic in the presence of three transitive relations.
Personal protective equipment and intensive care unit healthcare worker safety in the COVID-19 era (PPE-SAFE): An international survey
2020
Purpose To survey healthcare workers (HCW) on availability and use of personal protective equipment (PPE) caring for COVID-19 patients in the intensive care unit (ICU). Materials and method A web-based survey distributed worldwide in April 2020. Results We received 2711 responses from 1797 (67%) physicians, 744 (27%) nurses, and 170 (6%) Allied HCW. For routine care, most (1557, 58%) reportedly used FFP2/N95 masks, waterproof long sleeve gowns (1623; 67%), and face shields/visors (1574; 62%). Powered Air-Purifying Respirators were used routinely and for intubation only by 184 (7%) and 254 (13%) respondents, respectively. Surgical masks were used for routine care by 289 (15%) and 47 (2%) for…
Famiglie, disagio e servizio sociale
2019
Il volume raccoglie contributi che intendono disvelare la natura sociale e culturale della famiglia. Gli autori dei contributi hanno messo in evidenza come la famiglia, lungi dall'essere una entità ovvia e data per scontata, sia invece il prodotto di aspettative, comportamenti socialmente strutturati, oltre che di negoziazioni e di rapporti di potere e dinamiche, talvolta profondamente conflittuali. The volume collects contributions that intend to reveal the social and cultural nature of the family.
From subatomic to immense: About the possible influence of the Theory of Relativity and Quantum Mechanics in the fantastic
2021
Lo fantástico se fundamenta en tres pilares: la realidad, lo imposible y el miedo. La física teórica es una rama de la ciencia que ha estudiado lo real en profundidad, desde el mundo microscópico hasta las inmensidades del espacio exterior. En el presente artículo quiero estudiar de qué manera la Teoría de la Relatividad y la Mecánica Cuántica han influido en la configuración de lo fantástico e incluso constatar si algunas de sus comprobaciones permiten explicar determinados fenómenos fantásticos.
Emotions in Learning at Work : a Literature Review
2019
The research elaborating emotions in organizational settings has increased considerably in recent years. However, we lack a comprehensive understanding of the role of emotions in learning at work. This review aimed to elaborate how emotions and learning are understood in the field of workplace studies, and how emotions and learning at work are related. For the review, 31 scientific articles were selected and analysed. We found that emotions and learning were understood in a range of ways in the articles. Emotions were mainly defined as emotional experiences and responses, and learning at work mainly referred to learning through participatory practices. In addition, the review illustrates th…