1,966 research outputs found
Gli effetti della job inscurite sul bullismo e il benessere dei lavoratori: il ruolo moderatore dei tratti di personalità, del supporto sociale al lavoro e delle dimensioni di identità lavorativa
No full textL'obiettivo principale del presente contributo è quello di colmare le lacune esistenti nella letteratura della job insecurity quantitativa e qualitativa. Vengono, quindi, presentati una rassegna della letteratura esiste e proposti due studi innovativi che hanno evidenziato nuovi aspetti da considerare nelle future ricerche empiriche. Innanzitutto, è stato mostrato che le due dimensioni della job insecurity hanno un effetto diretto sul bullismo lavorativo, sul burnout e sul work engagement. Inoltre, aspetto ancora più innovativo, sono stati proposti diversi fattori di moderazione nella relazione job insecurity-risultati: i tratti della personalità (secondo il modello a sei fattori), il supporto sociale al lavoro (che include due dimensioni classiche e due nuove dimensioni di supporto che è possibile percepire nel contesto lavorativo) e le dimensioni di identità lavorative (adattando al contesto lavorativo il modello dello sviluppo d'identità di vita generale). I dati self-report sono stati raccolti da un campione eterogeneo di lavoratori italiani ed alcuni strumenti di valutazione sono stati rivisti e adattati con lo scopo di validare l'aspetto lavorativo della misurazione
HBsAg, HBcAg and delta-Ag in liver tissue: simultaneous visualization in a single tissue section by triple immunostaining
No full textThe distribution pattern of HBsAg, HBcAg and Delta-Ag was investigated by immunohistochemistry in a series of paraffin embedded liver tissue specimens from 45 subjects with serum HBsAg and anti-Delta antibody positivity. An indirect immunoperoxidase technique was used. Stains for HBsAg, HBcAg and Delta-Ag were alternatively carried out on serial tissue sections and, for the first time, consecutively in a single section (triple immunostaining). Simultaneous presence of all antigens occurred in 7 out of 45 cases, and of two antigens (HBsAg and Delta-Ag) in the remaining 38. Two antigens (either HBsAg and HBcAg or HBcAg and Delta-Ag) could also be shown in the same cell. A series of new observations was forwarded by the successful application of triple immunostaining in the present series: 1) high frequence of simultaneous presence of HBcAg and Delta-Ag (7 out of 45 cases = 16%); 2) cytoplasmic localization of Delta-Ag; 3) localization of HBcAg on the cell membrane of HBsAg positive Ground-Glass (G-G) hepatocytes; 4) Ground-Glass appearance of hepatocytic cytoplasm associated with exclusive content of HBcAg (HBcAg-Ground-Glass: a new variant of G-G-hepatocytes)
Living in Liquid Times: The Relationships among Job Insecurity, Life Uncertainty, and Psychosocial Well-Being
No full textStress research has widely documented how uncertainty represents a strong stressor that, in general, is negatively associated with well-being. While the literature on job insecurity about this topic is extensive and exhaustive, empirical research on the outcomes of life uncertainty, namely the perception and feeling of precariousness regarding the present and future of one’s own life, is yet to be fully explored. In the present paper, we aimed to investigate the relationships among job insecurity, life uncertainty, and psychosocial well-being outcomes, specifically, with a focus on job satisfaction and burnout. The participants were 357 workers (M = 146 and F = 211), with an average age of 41.78 y.o. (SD = 13.49), who completed an online questionnaire containing, in addition to sociodemographics information, measures of the study variables, namely job insecurity, life uncertainty, job satisfaction, and burnout. The results pointed out negative relationships of both job insecurity and life uncertainty with individual well-being, as they were negatively associated with job satisfaction and positively related to burnout. In a path analysis with latent variables, life uncertainty proved to fully mediate the relationship between job insecurity and psychosocial well-being
Numerical and theoretical analyses of settlements of strip shallow foundations on normally consolidated clays under partially drained conditions
No full textIn the geotechnical community, the macroelement approach nowadays is largely considered to be a successful theoretical tool for solving soil–structure interaction problems. This approach is based on the definition of a generalised constitutive law putting in relation a small number of suitably defined generalised stress/strain variables. The macroelement formulations proposed in the literature take into consideration either drained or undrained cases, but disregard the hydro-mechanical coupling. In this paper, the authors intend to generalise the theory by introducing a new formulation for shallow foundations overpassing this limitation and capable of accounting for the influence of loading rate on the system response. To conceive and to calibrate the model, the authors numerically analysed the case of a shallow foundation positioned on a normally consolidated clayey soil stratum whose mechanical behaviour is reproduced by means of the modified Cam Clay model. Finally, the approach is discussed critically from the perspective of its use as a design tool according to approaches based on the ultimate limit state and displacement
Dimensionality, reliability and validity of a multidimensional job insecurity questionnaire. preliminary findings in the italian context
No full textJob insecurity is considered one of the major work stressors in the contemporary working life. Despite a long tradition of research, to date many questions about job insecurity are still open, including those regarding its measurement model. The present study aimed to introduce a Multidimensional Job Insecurity Questionnaire (MJIQ) and provide support for its psychometric properties. The MJIQ was composed by 20 items and is aimed at offering a complete and balanced assessment of job insecurity in its major dimensions (i.e. quantitative and qualitative) and narrow facets (affective and cognitive). Participants were employees from private and public Italian organizations (N=405). Results of Exploratory Factor Analysis supported the emergence of two major dimensions, namely quantitative and qualitative job insecurity. The invariance of the measurement model tested via Multi-group Confirmative Factor Analysis showed that the MJIQ parameters were invariant across gender. The two major dimensions of job insecurity evidenced good reliability and strong concurrent validity with wellknown job insecurity outcomes. Overall, these preliminary results show that MJIQ is a reliable and valid measure to tap the complexity of the job insecurity construct
The effect of job insecurity and life uncertainty on everyday consumptions and broader life projects during covid-19 pandemic
No full textContemporary society is characterized by a high level of uncertainty in many domains of everyday life. The COVID-19 pandemic has generated a deep economic crisis, exacerbating worldwide feelings of uncertainty and precarity. Individuals with insecure jobs have (and will) probably suffered the most from this situation. Workers with higher job insecurity have poorer psychological and physical health, display more negative work attitudes and are less satisfied about their life. However, much less is known about the impact of job insecurity and life uncertainty on consumer behavior. Using the Conservation of Resources theory as a framework, the present study examines a model in which job insecurity and life uncertainty would have a negative effect on everyday consumptions and broader life projects of individuals. Data collection was conducted in Italy in June and July 2020 during COVID-19 pandemic, in the immediate aftermath of the national lockdown. In a sample of 830 workers, the results of a mediation analysis showed that job insecurity and life uncertainty had a detrimental impact of consumer behaviors, since they were significantly associated with higher propensity to sacrifice and reduce everyday short-term consumptions (e.g., buying food) and greater perceived unaffordability of broader long-term life projects (e.g., buying a house)
La gestione centralizzata degli acquisti in sanità per la razionalizzazione e riqualificazione della spesa
No full textIl capitolo illustra le più recenti evoluzioni normative in atto a livello nazionale finalizzate a razionalizzare e riqualificare la spesa per beni e servizi, con particolare attenzione all’analisi delle finalità di soggetti che esercitano un ruolo chiave nella gestione di acquisti centralizzati e alle disposizioni del recente nuovo Codice degli Appalti. Inoltre, fornisce un quadro aggiornato delle diverse soluzioni istituzionali ed organizzative adottate dalle Regioni per la gestione dei processi di acquisto e propone un quadro interpretativo e valutativo per l’analisi delle soluzioni individuate a livello nazionale ed europeo anche rispetto al diverso contesto istituzionale/organizzativo
Immunomorphological analysis of the role of blood vessel endothelium in the morphogenesis of cutaneous Kaposi's sarcoma: a study of 57 cases
No full textIn this study we report the histopathological features in a series of 88 biopsies from patients with cutaneous Kaposi's sarcoma; immunohistochemical examination for Factor VIII related antigen has been carried out on frozen and paraffin-embedded sections. The patient groups comprised 50 elderly patients, seven of whom were immuno-compromised, six patients with AIDS and one patient who had received a renal allograft. The findings were similar in these three groups. Histological staging was carried out with subdivision into stage I--patches characterized by angiomatoid and glomeruloid structures; stage II--plaques characterized by confluence of angiomatoid and glomeruloid structures and with spindle cells; and stage III--nodules in which the spindle cells were proliferative and frankly sarcomatous. Factor VIII related antigen was demonstrated in the central vessels of glomeruloid lesions whilst the surrounding vascular network contained both antigen-negative and antigen-positive vessels; in stage II and III lesions the spindle cells were consistently positive only in frozen section material. The findings were similar in the three patient groups. Our results suggest that Kaposi's sarcoma evolves from stage I through to stage III, that both blood vessels and lymphatic vessels are involved in the vascular proliferation and that the spindle cells are derived from vascular endothelium
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