1,356,644 research outputs found
Long-term Results for the BacJac Interspinous Device in Lumbar Spine Degenerative Disease
No full textObjective: To evaluate the long-term results of using the BacJac interspinous device (Pioneer Surgical Technology Inc.) in a series of patients with degenerative lumbar spine disease. Methods: Forty-one patients undergoing lumbar surgery with implantation of a BacJac device from 2009 to 2012 were enrolled in the present study. Patients were evaluated using the Oswestry Disability Scale (ODI). Results: Although all patients showed a significant improvement of the ODI score immediately after surgery, only 41% of patients showed a satisfactory outcome. We observed worse results in the patients operated on at the L3-L4 level and in whom the device was implanted in a segment different from the one where surgical decompression had been performed. Weight gain in the months after surgery was also a poor outcome-influencing factor. Conclusions: This study confirms what is already suggested in the relevant literature regarding the long-term inefficacy of the so-called dynamic stabilization devices
Exploring the impact of AI on work deign: a structured literature review
No full textThe interaction between digital technologies and people is a highly debated topic at both policy and academic levels. The recent proliferation of Artificial Intelligence (AI) systems in various organisational practices creates not only new opportunities, but also new challenges in terms of work design and ethical considerations, thus increasing the need to explore the use and impact of these new technologies on organisational models and work practices. Therefore, this article aims to contribute to the evolving discourse on work design by conducting a structured literature review (SLR) focusing on the use and implications of artificial intelligence in organisational models and work practices. By synthesising findings from existing research, this study provides a comprehensive analysis of the current state of AI adoption and its implications for work design
Extraforaminal disk herniation treatment with surgical exploration by unilateral intertransversarii microsurgical approach
No full textIn this study we evaluated the role of a unilateral intertransversarii microsurgical approach for the treatment of extraforaminal lumbar disk herniations (ELDHs), with short-, medium-, and long-term follow-up
Management control system in smart and sustainable firms. A theoretical analysis from an ecosystem perspective
No full textIn today's competitive environment, smart technologies are increasingly recognized as key enablers of corporate sustainability. In this new context, corporate management control systems integrate with the issues of smart technologies, sustainability and inter- and intra-organizational collaboration as the driving elements of the firm of the future.
This book proposes a management control framework for today's firms. It investigates the effectiveness of traditional management control systems in today’s competitive environment and identifies potential limitations that may hinder their ability to effectively monitor modern organizations. Furthermore, the book explores whether these systems can be improved with complementary tools or if entirely new mechanisms are required. The book argues the need to adopt a new approach to control and a different lens for evaluating the activity of guiding the achievement of corporate objectives, paving the way for the conceptualization of a new management control system
The long process by which HTA became a paradigm: A longitudinal conceptual structure analysis
No full textThis study maps the conceptual structure of health technology assessment (HTA) research with the aim of contributing to a better understanding of this research stream. A bibliometric analysis of 1,198 HTA articles retrieved from the Web of Science database was conducted. The analysis of descriptive performance indicators identified the main traits of the scientific debate about the HTA in terms of publications, productive countries, and sources. A co-word analysis was performed by adopting social network analysis tools to map the conceptual structure of the dataset. The results highlight the growing academic interest in the research topic, especially in recent years. The results revealed that HTA is a widely known term and represents the reference paradigm for assessment in healthcare technologies. This paper contributes to the field by providing an examination of the current state of the art of HTA research and identifying possible future research directions. This study differs from existing studies because it involved a conceptual analysis of the scientific literature using macro keywords
Proposal of a Incremental Modal Pushover Analysis (IMPA)
No full textIn recent years, many research activities were undertaken to develop a reliable and practical analysis procedure to
identify the safety level of existing structures. The Incremental Dynamic Analysis (IDA) is considered to be one of the most
accurate methods to estimate the seismic demand and capacity of structures. However, the executions of many nonlinear
response history analyses (NL_RHA) are required to describe the entire range of structural response. The research discussed in
this paper deals with the proposal of an efficient Incremental Modal Pushover Analysis (IMPA) to obtain capacity curves by
replacing the nonlinear response history analysis of the IDA procedure with Modal Pushover Analysis (MPA). Firstly, In this
work, the MPA is examined and extended to three-dimensional asymmetric structures and then it is incorporated into the
proposed procedure (IMPA) to estimate the structure‟s seismic response and capacity for given seismic actions. This new
procedure, which accounts for higher mode effects, does not require the execution of complex NL-RHA, but only a series of
nonlinear static analysis. Finally, the extended MPA and IMPA were applied to an existing irregular framed building
8 Racconti di Milano. Verso un nuovo progetto di città
No full textIl libro, esito editoriale di un ciclo di Seminari (8 Racconti di Milano) svolti presso la sede di Assimpredil Ance di Milano, tratteggia i cambiamenti dei profili sociali, economici e demografici, le possibili regole per il governo delle trasformazioni urbane, la dimensione territoriale delle problematiche ambientali e di mobilità, la domanda di casa sociale e assieme di urbanità e bellezza della città, la rigenerazione urbana come necessario paradigma per uno sviluppo sostenibile, le differenti idee di città che ne sostengono previsioni e scelte; cercando di raccontare queste differenti dimensioni attraverso l’ineludibile filo conduttore del cambiamento. I tre autori hanno istruito i Racconti attraverso 8 saggi tematici generali e chiesto contributi specifici a studiosi ed esperti, ripercorrendo le cose dette e soprattutto maturate nel confronto e attraverso il dialogo svolto all'interno dei Seminari, cercando di leggerle e attualizzarle in rapporto alla crisi sistemica conseguente alla pandemia Covid19. Nella condivisa consapevolezza che non sia più il momento di definire scenari stabili e di ipotizzare previsioni di lungo periodo, ma forse quello di provare ad abilitare il futuro per orientarlo verso un diverso, sostenibile e più equilibrato modello di sviluppo
The role of affective reactions and moral norms in the intention to stay at hotels employing people with Down syndrome
No full textFinite element analysis of reinforced concrete bridge piers including a flexure-shear interaction model
No full textThis paper discusses the seismic behavior of reinforced concrete (RC) bridge structures, focusing on the shear-flexure interaction phenomena. The assessment of reinforced concrete bridges under seismic action needs the ability to model the effective non-linear response in order to identify the relevant failure modes of the structure. Existing RC bridges have been conceived according to old engineering practices and codes, lacking the implementation of capacity design principles, and therefore can exhibit premature shear failures with a reduction of available strength and ductility. In particular, recent studies have shown that the shear strength can decrease with the increase of flexural damage after the development of plastic hinges and, in some cases, this can cause unexpected shear failures in the plastic branch with a consequent reduction of ductility. The aim of the research is to implement those phenomena in a finite-element analysis. The proposed model consists of a flexure fiber element coupled with a shear and a rotational slip spring. The model has been implemented in the OpenSEES framework and calibrated against experimental data, showing a good ability to capture the overall response
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