4,662 research outputs found
Organizational Climate as Performance Driver: Health Care Workers’ Perception in a Large Hospital
No full textRecently health care (HC) organizations have increasingly embarked on organizational climate (OC) assessment with the intent to improve their efficiency and the quality of the delivered services. This is important; however, it is even if more crucial to ensure that workers engaged in the evaluation process are aware of the importance of their fruitful engagement in this investigation as well as of its potential benefits. From the management viewpoint, this is crucial to plan and implement management initiatives able to create a great place to work. The purpose of this paper is to shed empirical light on how, in effect, HC workers perceive OC for itself and as a performance driver to assess and manage. The study was carried out through an action research (AR) project, which included the use of both qualitative and quantitative approaches. Key phases of the AR project were some focus groups and a survey. During the focus groups, several methods and approaches were adopted for getting opinions from people and animating discussion. About the survey, a total sample of 560 HC workers was investigated.
The AR project has shown that even if HC workers intuitively conceive OC as an important performance driver, the meaning of the construct is not completely clear. Moreover, a good level of awareness among HC workers about how and why OC can improve individual and organizational performance represents a key issue to address in evaluating and managing OC
Reasoning, Action and Interaction in AI Theories and Systems: Essays Dedicated to Luigia Carlucci Aiello
No full textThe present book is a festschrift in honor of Luigia Carlucci Aiello. The 18 articles included are written by former students, friends, and international colleagues, who have cooperated with Luigia Carlucci Aiello, scientifically or in AI boards or committees. The contributions by reputed researchers span a wide range of AI topics and reflect the breadth and depth of Aiello's own work
Il Fiore di Stucco
No full textThe core of his research paths is theater, considered in its two main components: its physical materialization, the buildings and sites conceived to contain the theatrical event (semiotics of theater architecture) and the dialogue relationship between authors/actors/audience.
These issues originate from the work done in the Teatro Olimpico in Vicenza (1999). Stefano Carlucci also collaborates with the Department of Mechanics, Politecnico di Milano, for the realization of a research project aimed to point out the possible points of contact between forensic engineering and semiotics
Olivo e olio nel bacino mediterraneo dalla Preistoria al Medioevo. Aspetti colturali, produttivi, storici, funzionali
No full textIl percorso progettuale ‘Horizon Europe Seeds Olivo e olio nel bacino mediterraneo dalla Preistoria al Medioevo: aspetti colturali, produttivi, funzionali ’ è concepito in continuità con analoghe proposte – rivolte in primis all’area mediterranea – che hanno mostrato le potenzialità dei dati desumibili dall’analisi della tradizionale produzione olivicolo-olearia nell’ottica della integrazione interdisciplinare e del confronto serrato delle informazioni che ciascuna branca di studio può offrire alla disamina globale della filiera elaicola. In tal senso, il progetto ha inteso avvalersi del contributo di ambiti euristici e diagnostici pertinenti il campo storico-archeologico, agroambientale, archeometrico e geologico-minero/petrografico e ha perseguito obiettivi di conoscenza, tutela, valorizzazione, condivisione della coltura dell’olivo e della cultura dell’olio d’oliva tra passato e presente. Quindi l’opportunità cogente di imbastire una trama proficua di relazioni e di riflessioni entro la comunità scientifica ha suggerito di organizzare un convegno internazionale celebrato dal 15 al 18 maggio 2023, a Bari, e sviluppato in una sessione seminariale e in una tavola rotonda, dei cui esiti salienti questa pubblicazione dà conto.The ‘Horizon Europe Seeds Olive and Oil in the Mediterranean Basin from Prehistory to the Middle Ages: Cultivation, Production, Functional Aspects’ project is conceived in continuity with similar proposals – aimed primarily at the Mediterranean area – which have shown the potential of the data that can be deduced from the analysis of traditional olive-oil production with a view to interdisciplinary integration and close comparison of the information that each branch of study can offer to the global examination of the olive sector. In this sense, the project aimed to make use of the contribution of heuristic and diagnostic fields pertinent to the historical-archaeological, agri-environmental, archaeometrical and geological/mineral/petrographic fields and pursued the objectives of knowledge, protection, valorisation and sharing of olive cultivation and olive oil culture between past and present. Therefore, the compelling opportunity to set up a fruitful web of relations and reflections within the scientific community suggested the organisation of an international conference celebrated from 15 to 18 May 2023, in Bari, and developed into a seminar session and a round table, the salient outcomes of which this publication reports
Porosity and crystal morphology of heterometallic coordination networks from β-diketonate ligands
No full textPorous coordination polymers (PCPs) or metal-organic-frameworks (MOFs) are considered very promising porous materials that can be exploited in many different technological fields such as gas storage, heterogeneous catalysis and separation of mixtures. In the field of MOF materials, many efforts are devoted to the search of rational synthetic procedures. Among others, a useful synthetic strategy is the so-called Metalloligand (MLs) approach. MLs are coordination complexes containing suitably oriented exo donor-groups that, used in place of organic linkers, can orient the formation of desired homo and heterometallic polymeric architectures [1]. Functionalized chelating ligands suited to obtain useful MLs are -diketonate molecules.[2]
We report the synthesis and the structural characterization of two families of coordination frameworks obtained through the use of different -diketonate ligands with copper salts of several counter-ions. The first family of polymers have a two-dimensional layered structure whereas the members of the second family adopt a three-dimensional flexible framework structure.
We have focused our attention to the correlations between the crystal structure, the dimensionality, the topology and porosity of the networks and the crystal morphologies, as well as to the investigation of the surface phenomena during the crystal growing process. Moreover, we have mapped a continuous set of crystal morphologies by controlling experimental variables such as the solvent system, the metal-ligand molar ratio and the nature of the counter-anion. The aim is to develop a method to tune the crystal habit according to the specific requirement of some important applications.[3]
[1] S. Kitagawa, R. Kitaura, S. Noro Angew. Chem., Int. Ed., 43 (2004) 2334.
[2] L. Carlucci, G. Ciani, S. Maggini, D.M. Proserpio, M. Visconti, Chem. Eur. J, 16 (2010) 12328.
[3] L. Carlucci, G. Ciani, J. M. Garcìa-Ruiz, M. Moret, D. M. Proserpio and S. Rizzato , Cryst. Growth Des., 2009, 9(12), 5024-5034
Frank C. Carlucci
No full textFrank Charles Carlucci III (born October 18, 1930) served as the United States Secretary of Defense from 1987 to 1989 in the administration of President Ronald Reagan. Prior to that, Carlucci served in a variety of senior-level governmental positions, including Director of the Office of Economic Opportunity in the Richard Nixon administration,Deputy Director of the CIA in the Jimmy Carter administration, and Deputy Secretary of Defense and National Security Advisor in the Reagan administration.
Bio taken from Wikipedia, accessed 11/14/14.https://nsuworks.nova.edu/nsudigital_forums/1041/thumbnail.jp
Molecular recognition and crystal energy landscapes : an X-ray and computational study of caffeine and other methylxanthines
No full textWe introduce a new approach to crystal-packing anal., based on the study of mutual recognition modes of entire mols. or of mol. moieties, rather than a search for selected atom-atom contacts, and on the study of crystal energy landscapes over many computer-generated polymorphs, rather than a quest for the one most stable crystal structure. The computational tools for this task are a polymorph generator and the PIXEL d. sums method for the calcn. of intermol. energies. From this perspective, the mol. recognition, crystal packing, and solid-state phase behavior of caffeine and several methylxanthines (purine-2,6-diones) have been analyzed. Many possible crystal structures for anhyd. caffeine have been generated by computer simulation, and the most stable among them is a thermodn., ordered equiv. of the disordered phase, revealed by powder X-ray crystallog. Mol. recognition energies between two caffeine mols. or between caffeine and water have been calcd., and the results reveal the largely predominant mode to be the stacking of parallel caffeine mols., an intermediately favorable caffeine-water interaction, and many other equiv. energy min. for lateral interactions of much less stabilization power. This last indetn. helps to explain why caffeine does not crystallize easily into an ordered anhyd. structure. In contrast, the mono- and dimethylxanthines (theophylline, theobromine, and the 1,7-isomer, for which we present a single-crystal X-ray study and a lattice energy landscape) do crystallize in anhyd. form thanks to the formation of lateral hydrogen bonds
A note on Hindman-Type Theorems for uncountable cardinals
No full textRecent results of Hindman, Leader and Strauss and of Fernández-Bretón and Rinot showed that natural versions of Hindman’s Theorem fail for all uncontable cardinals. On the other hand, Komjáth proved a result in the positive direction, showing that there are arbitrarily large abelian groups satisfying some Hindman-type property. In this note we show how a family of natural Hindman-type theorems for uncountable cardinals can be obtained by adapting some recent results of the author from their original countable setting
A chemical kinetics-based approach to predict uncontrolled self-ignitions in Hydrogen Internal Combustion Engines
No full textThe primary objective of the present work is to correlate the hydrogen explosive characteristics with internal combustion engine design parameters, particularly the engine compression ratio. An approach that couples the knowledge about H2 chemical behaviour, and the in-cylinder charge thermodynamic state, has been conceptualized in the form of a unified plot to visually inspect the likelihood of an auto-ignition event. The plot cautions the possible occurrence of autoignition if the state of the charge inside the engine cylinder reaches thermodynamic conditions beyond the explosion limit curve. Having at hand such a tool enables one to cautiously design future experiments to prevent possible damage because of extreme stresses due to an undesired autoignition event.
The results of the analyses in the present work have translated into defining a maximum limit on the compression ratio that can be proposed at pre-defined intake thermodynamic state, mixture composition, engine geometry and engine speed. Predictions based on recently developed chemical mechanisms were employed for the analyses, exploiting the well-established knowledge about the chemical kinetics of hydrogen oxidation.
Thus, zero-dimensional numerical simulations were performed. Such an approach avoids also the limitations associated with experimental procedures. To evaluate the maximum safe compression ratio, both a static and a time-based approach have been employed to study the vicinity of a thermodynamic state to the autoignition limit i.e., the explosion limit of hydrogen. Three possible criteria for the definition of a maximum safe geometrical compression ratio were developed and analysed. The present work has then been finally ensembled in the form of an empirical correlation involving intake pressure, intake temperature and equivalence ratio as the variables.
Furthermore lubricant oil as a contaminant seeping through the compression rings of a piston in an internal combustion engine, is modelled to evaluate the distribution of mass and temperature inside a droplet of n-hexadecane using 0D- simulations to evaluate the variation of ignition delay time within the droplet in gas-phase and its effect on the local concentration diluting the pure hydrogen in the vicinity and hence increasing the reactivity causing an early source of self- ignition.
A final study concerning developing detonations from hot spots is carried out to understand the effect of a temperature gradient other than ‘linear’ within the hot spot that could change the detonation response diagrams and subsequently the modes of reacting front propagation. Such detonations with high peak pressures are detrimental to components inside an internal combustion engine and therefore the need to study any possibility of its occurrence is crucial to a better understanding of the design
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