88 research outputs found
An Exploration of the Impact of Mapping Style and Device Roadmap on Simulated ReRAM Architectures for Neuromorphic Computing
This paper investigates the relationship between mapping style and device
roadmap in Resistive Random Access Memory (ReRAM) architectures for
neuromorphic computing. The study leverages simulations using DNN+NeuroSim to
evaluate the impact of different parameters on chip performance, including
latency, energy consumption, and overall system efficiency. The results
demonstrate that novel mapping techniques and a high-performance (HP) device
roadmap are optimal if energy and speed considerations are weighted equally.
This is because as the study demonstrates, HP devices provide a latency cut
that outsizes the energy cost. Additionally, adopting novel mapping in the
device cuts latency by nearly 30% while being slightly more energy efficient.
The findings highlight the importance of considering mapping style and device
roadmap in optimizing ReRAM architectures for neuromorphic computing, which may
contribute to advancing the practical implementation of ReRAM in computational
systems
The elderly and urban mobility: cost sensitivity of elderly people in the âoldestâ Italian city
The world is facing a series of changes that will modify the way we envisage transport planning in our cities. Demographic ageing as a consequence of higher life expectancy and lower fertility rates is a world-wide phenomenon. While ageing is indeed a triumph of scientific progress and increasing longevity is perceived as one of humanityâs greatest achievements, the transition in society needs to be managed. In the urban context, any increase in age, health, and economic conditions determines oneâs ability to enjoy the urban milieu and the so-called economies of urbanisation (advantages gained from an urban location, e.g., proximity to a market, labour supply, good communications, and financial and commercial services) longer. As there are more and more elderly people in cities, urban mobility becomes crucial in making the urban environment more inclusive. In order to provide suitable policy guidelines, it is, therefore, necessary to investigate and understand senior traveller behaviour. Â In this study, we investigate urban travel characteristics of people aged 65 years and over living in the city of Genoa (one of the cities with the largest population of the elderly in the EU). By utilising a structured questionnaire, the paper explores the satisfaction and motivations of approx. 600 elderly public transport users in the city. In particular, exploratory factor analysis has been used to determine the key dimensions of the satisfaction and mobility motivations, and subsequently to use them to investigate the cost sensitivity of elderly people
Teaching Theoretical Physics: the cases of Enrico Fermi and Ettore Majorana
We report on theoretical courses by Fermi and Majorana, giving evidence of
the first appearance and further development of Quantum Mechanics teaching in
Italy. On the basis of original documents, we make a comparison between Fermi's
and Majorana's approaches. A detailed analysis is carried out of Fermi's course
on Theoretical Physics attended by Majorana in 1927-28. Three (previously
unknown) programs on advanced Physics courses submitted by Majorana to the
University of Rome between 1933 and 1936 and the course he held in Naples in
1938 complete our analysis: Fermi's phenomenological approach resounded in
Majorana, who however combined it with a deeper theoretical approach, closer to
the modern way of presenting Quantum Mechanics.Comment: latex, 21 pages; a contribution in the centenary of the birth of
Ettore Majoran
A self-repair history: compensatory effect of a de novo variant on the FANCA c.2778+83C>G splicing mutation
Introduction: Fanconi anemia (FA) is a genome instability condition that drives somatic mosaicism in up to 25% of all patients, a phenomenon now acknowledged as a good prognostic factor. Herein, we describe the case of P1, a FA proband carrying a splicing variant, molecularly compensated by a de novo insertion. Methods and Results: Targeted next-generation sequencing on P1's peripheral blood DNA detected the known FANCA c.2778 + 83C > G intronic mutation and suggested the presence of a large deletion on the other allele, which was then assessed by MLPA and RT-PCR. To determine the c.2778 + 83C > G splicing effect, we performed a RT-PCR on P1's lymphoblastoid cell line (LCL) and on the LCL of another patient (P2) carrying the same variant. Although we confirmed the expected alternative spliced form with a partial intronic retention in P2, we detected no aberrant products in P1's sample. Sequencing of P1's LCL DNA allowed identification of the de novo c.2778 + 86insT variant, predicted to compensate 2778 + 83C > G impact. Albeit not found in P1's bone marrow (BM) DNA, c.2778 + 86insT was detected in a second P1's LCL established afterward, suggesting its occurrence at a low level in vivo. Minigene assay recapitulated the c.2778 + 83C > G effect on splicing and the compensatory role of c.2778 + 86insT in re-establishing the physiological mechanism. Accordingly, P1's LCL under mitomycin C selection preserved the FA pathway activity in terms of FANCD2 monoubiquitination and cell survival. Discussion: Our findings prove the role of c.2778 + 86insT as a second-site variant capable of rescuing c.2778 + 83C > G pathogenicity in vitro, which might contribute to a slow hematopoietic deterioration and a mild hematologic evolution
A self-repair history: compensatory effect of a de novo variant on the FANCA c.2778+83C>G splicing mutation
Introduction: Fanconi anemia (FA) is a genome instability condition that drives somatic mosaicism in up to 25% of all patients, a phenomenon now acknowledged as a good prognostic factor. Herein, we describe the case of P1, a FA proband carrying a splicing variant, molecularly compensated by a de novo insertion.Methods and Results: Targeted next-generation sequencing on P1âs peripheral blood DNA detected the known FANCA c.2778 + 83C > G intronic mutation and suggested the presence of a large deletion on the other allele, which was then assessed by MLPA and RT-PCR. To determine the c.2778 + 83C > G splicing effect, we performed a RT-PCR on P1âs lymphoblastoid cell line (LCL) and on the LCL of another patient (P2) carrying the same variant. Although we confirmed the expected alternative spliced form with a partial intronic retention in P2, we detected no aberrant products in P1âs sample. Sequencing of P1âs LCL DNA allowed identification of the de novo c.2778 + 86insT variant, predicted to compensate 2778 + 83C > G impact. Albeit not found in P1âs bone marrow (BM) DNA, c.2778 + 86insT was detected in a second P1âs LCL established afterward, suggesting its occurrence at a low level in vivo. Minigene assay recapitulated the c.2778 + 83C > G effect on splicing and the compensatory role of c.2778 + 86insT in re-establishing the physiological mechanism. Accordingly, P1âs LCL under mitomycin C selection preserved the FA pathway activity in terms of FANCD2 monoubiquitination and cell survival.Discussion: Our findings prove the role of c.2778 + 86insT as a second-site variant capable of rescuing c.2778 + 83C > G pathogenicity in vitro, which might contribute to a slow hematopoietic deterioration and a mild hematologic evolution
Modulation of 5-fluorouracil as adjuvant systemic chemotherapy in colorectal cancer: the IGCS-COL multicentre, randomised, phase III study
The aims of this multicentre, randomised phase III trial were to evaluate: ( 1) the role of levamisol (LEV); and ( 2) the role of folinic acid ( FA), added to 5-fluorouracil (5FU) in the adjuvant treatment of colorectal cancer. Patients with histologically proven, radically resected stage II or III colon or rectal cancer were eligible. The study had a 2 x 2 factorial design with four treatment arms: ( a) 5FU alone, (b) 5FU+LEV, ( c) 5FU+FA, ( d) 5FU+LEV+FA, and two planned comparisons, testing the role of LEV and of FA, respectively. From March 1991, to September 1998, 1327 patients were randomised. None of the two comparisons resulted in a significant disease-free (DFS) or overall (OAS) survival advantage. The hazard ratio (HR) of relapse was 0.89 (95% confidence intervals (CI): 0.73 - 1.09) for patients receiving FA and 0.99 ( 95% CI 0.80 - 1.21) for those receiving LEV; corresponding HRs of death were 1.02 ( 95% CI: 0.80 - 1.30) and 0.94 ( 95% CI 0.73 - 1.20). Nonhaematological toxicity ( all grade vomiting, diarrhoea, mucositis, congiuntivitis, skin, fever and fatigue) was significantly worse with FA, while all other toxicities were similar. In the present trial, there was no evidence that the addition of FA or LEV significantly prolongs DFS and OAS of radically resected colorectal cancer patients
Prospective validation of the CLIP score: a new prognostic system for patient with cirrhosis and hepatocellular carcinoma
Prognosis of patients with cirrhosis and hepatocellular carcinoma (HCC) depends on both residual liver function and tumor extension. The CLIP score includes Child-Pugh stage, tumor morphology and extension, serum alfa-fetoprotein (AFP) levels, and portal vein thrombosis. We externally validated the CLIP score and compared its discriminatory ability and predictive power with that of the Okuda staging system in 196 patients with cirrhosis and HCC prospectively enrolled in a randomized trial. No significant associations were found between the CLIP score and the age, sex, and pattern of viral infection. There was a strong correlation between the CLIP score and the Okuda stage, As of June 1999, 150 patients (76.5%) had died. Median survival time was 11 months, overall, and it was 36, 22, 9, 7, and 3 months for CLIP categories 0, 1, 2, 3, and 4 to 6, respectively. In multivariate analysis, the CLIP score had additional explanatory power above that of the Okuda stage. This was true for both patients treated with locoregional therapy or not. A quantitative estimation of 2-year survival predictive power showed that the CLIP score explained 37% of survival variability, compared with 21% explained by Okuda stage. In conclusion, the CLIP score, compared with the Okuda staging system, gives more accurate prognostic information, is statistically more efficient, and has a greater survival predictive power. It could be useful in treatment planning by improving baseline prognostic evaluation of patients with RCC, and could be used in prospective therapeutic trials as a stratification variable, reducing the variability of results owing to patient selection
Luigi Settembrini. Periodico letterario educativo mensile. A. 2, n.1(1892)-A. 3, n.10(1894)
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Economic consequences of investing in anti-HCV antiviral treatment from the Italian NHS perspective : a real-world-based analysis of PITER data
OBJECTIVE:
We estimated the cost consequence of Italian National Health System (NHS) investment in direct-acting antiviral (DAA) therapy according to hepatitis C virus (HCV) treatment access policies in Italy.
METHODS:
A multistate, 20-year time horizon Markov model of HCV liver disease progression was developed. Fibrosis stage, age and genotype distributions were derived from the Italian Platform for the Study of Viral Hepatitis Therapies (PITER) cohort. The treatment efficacy, disease progression probabilities and direct costs in each health state were obtained from the literature. The break-even point in time (BPT) was defined as the period of time required for the cumulative costs saved to recover the Italian NHS investment in DAA treatment. Three different PITER enrolment periods, which covered the full DAA access evolution in Italy, were considered.
RESULTS:
The disease stages of 2657 patients who consecutively underwent DAA therapy from January 2015 to December 2017 at 30 PITER clinical centres were standardized for 1000 patients. The investment in DAAs was considered to equal âŹ25 million, âŹ15 million, and âŹ9 million in 2015, 2016, and 2017, respectively. For patients treated in 2015, the BPT was not achieved, because of the disease severity of the treated patients and high DAA prices. For 2016 and 2017, the estimated BPTs were 6.6 and 6.2 years, respectively. The total cost savings after 20 years were âŹ50.13 and âŹ55.50 million for 1000 patients treated in 2016 and 2017, respectively.
CONCLUSIONS:
This study may be a useful tool for public decision makers to understand how HCV clinical and epidemiological profiles influence the economic burden of HCV
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