101,862 research outputs found
Thermal adaptation and physiological responses to environmental stress in tunicates
No full textUnderstanding the multifaceted nature of environmental fluctuations is crucial to
predicting the physiological adjustments utilised by organisms in resisting or adapting to changes
over time. Here we investigate the effects of 2 environmental stressors on tunicates, whose fitness
can have important repercussions on the quality of habitat. Specifically, we report respiration rate
(RR), clearance rate (CR), and assimilation efficiency (AE) of the ascidian Styela plicata in
response to a range of temperatures and varying food availability. Temperature-dependent RR
was observed only within a portion of the thermal window of the species. Significant differences
in clearance rates were detected among organisms fed with varying algal concentrations, while no
significant influence of food concentrations on AE was observed. This plasticity of the physiological
rates and the development of ubiquitous mechanisms such as temperature-insensitive aerobic
metabolism suggest a competitive advantage of this group. Such knowledge may allow for more
accurate predictions of the physiological and evolutionary mechanisms driving current and future
distribution of this species
L’isterectomia peripartum: la nostra esperienza
No full textObiettivo: determinare l'incidenza, l'indicazione e l'associazione con il parto cesareo dell'isterectomia peripartum (I.P.), la morbilità e la mortalità materna e neonatale. Materiale e metodo: sono stati esaminati tutti i casi di isterectomia peripartum osservati presso l’U.O. di Ostetricia e Ginecologia dell'A.O.S. S. Antonio Abate di Trapani dall’1/01/2001 al 31/05/2006. Risultati: sono stati eseguiti 13 interventi di I.P. pari al 2,26‰ parti di cui 46,1% come isterectomia totale, e 53,9% come isterectomia
subtotale. Il 69,2% degli interventi praticati è stato eseguito in condizioni d'emergenza mentre il 30,8% è stato programmato. Le indicazioni sono state: placenta previa accreta (38,4%), placenta accreta n.i. (7,6%), metrorragia da distacco intempestivo di placenta, Hellp sindrome e CID (38,3%), atonia uterina resistente a terapia medica
(15,5%) e rottura d'utero (7,6%). Otto pazienti (61,6%) erano precesarizzate. In 12 pazienti (92,4%) l'intervento è stato eseguito durante o subito dopo parto cesareo. È stata osservata una morte materna per embolia polmonare mentre, per quanto riguarda la morbilità, il 38,4 % delle pazienti è stato trasferito in terapia intensiva, una paziente è stata sottoposta a 4 laparotomie successive. Non si è avuto
alcun caso di mortalità neonatale. Conclusioni: la placenta previa accreta è la più comune indicazione all'intervento di isterectomia peripartum; essa è proporzionalmente
associata con il numero di pregressi parti cesarei che predispongono la cavità uterina ad inserzioni più basse e profonde
Solitary metastasis from melanoma causing bowel perforation
No full textSkin melanoma can metastasize to any organ or tissue. The median survival in patient with intestinal metastases is inferior to 7 months compared to other sites metastasis. A wide intestinal resection including the resection of the mesentery with lymph nodes remains the main treatment due to the low morbidity and mortality rate it is also associated with
Does syndromic surveillance assist public health practice in early detecting respiratory epidemics? Evidence from a wide Italian retrospective experience
No full textBackground: Large-scale diagnostic testing has been proven ineffective for prompt monitoring of the spread of COVID-19. Electronic resources may facilitate enhanced early detection of epidemics. Here, we aimed to retrospectively explore whether examining trends in the use of emergency and healthcare services and the Google search engine is useful in detecting Severe Acute Respiratory Syndrome Coronavirus outbreaks early compared with the currently used swab-based surveillance system. Methods: Healthcare Utilization databases of the Italian region of Lombardy and the Google Trends website were used to measure the weekly utilization of emergency and healthcare services and determining the volume of Google searches from 2020 to 2022. Improved Farrington algorithm (IMPF) and Exponentially Weighted Moving Average (EWMA) control chart were both fitted to detect outliers in weekly searches of nine syndromic tracers. AND/OR Boolean operators were tested aimed for joint using tracers and models. Signals that occurred during periods labelled as free from epidemics were used to measure positive predictive values (PPV) and false negative values (FNV) in anticipating the epidemic wave. Results: Out of the 156 weeks of interest, 70 (45 %) were affected by epidemic waves. Overall, 54 syndromic signals were obtained from any one of the 7 healthcare or Google tracers, generating an outlier from both the EWMA and IMPF models. PPV values of 0.95, 1.00, 0.96 admitting a delay of 0, 1, and 2 weeks, respectively, between signal and epidemic wave. The values of FNP ranged from 0.19 to 0.21. Conclusions: High predictive power for anticipating COVID-19 epidemic waves, even two weeks ahead of the official reports, was obtained from electronic syndromic tracers of healthcare-seeking trends and Google search engine use. Following verification via a prospective approach, public health organizations are encouraged to take advantage of this free forecasting system to anticipate and effectively manage respiratory outbreaks
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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3346: Samuel G. Freedman, author, 2013
No full textPhotograph of author Samuel G. Freedman, at NT Daily Slash meeting in the Mayborn School of Journalism at UNT
Fifteen years of research in sustainable energy systems at DTG
No full textAt the Department of Management and Engineering (DTG) of the University of Padova (Italy), the research team led by Prof. Renato Lazzarin, formed by the au-thors, worked during the first fifteen years of the millennium on different topics fo-cused on sustainable technologies for energy production and utilization. Both ex-perimental and theoretical/modelling studies were carried on: the energy impact of building insulation materials in Italy was analyzed, in terms of both Life Cycle As-sessment and Life Cycle Cost; the passive cooling in summer time and the enhanced insulating properties during winter time of a green roof installed at the Vicenza Hospital were assessed by suitable measurement sessions, and a predictive numeri-cal model was developed; a test rig was set at DTG to experimentally measure ener-gy performance of different photovoltaic/thermal modules, some of which were de-signed and built by the authors; a simulation software was developed to evaluate energy and economic advantages of direct and indirect evaporative cooling tech-niques; application of energy savings techniques for the refrigeration and air condi-tioning in supermarkets, and for energy production in different industry sectors were evaluated for some real cases; an extensive analysis of the urban heat island effect in the city of Padova was carried on both theoretically and experimentally. The paper summarizes the main ideas and results of the research during the fifteen years period work together
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