117,610 research outputs found
Correction to: Comparison of three-parameter kinetic model analysis to standard Patlak’s analysis in 18F-FDG PET imaging of lung cancer patients
No full textFollowing publication of the original article [1], the authors flagged that the author affiliations detailed in the article are incorrect for the authors M. L. Calcagni and A. Giordano
Nonlinear stability in nonlocal gravity
No full text12 pags.We address the stability issue of Ricci-flat and maximally symmetric spacetimes in nonlocal gravity to all perturbative orders in the gravitational perturbation. Assuming a potential at least cubic in curvature tensors but quadratic in the Ricci tensor, our proof consists on a mapping of the stability analysis in nonlocal gravity to the same problem in Einstein-Hilbert theory. One of the consequences is that only the graviton field can propagate and the theory is ghost-free at all perturbative orders. All the results known in Einstein gravity in vacuum with or without a cosmological constant can be exported to the case of nonlocal gravity: if a spacetime is stable at all perturbative orders in Einstein gravity, it is stable also in nonlocal gravity. Minkowski and de Sitter spacetimes are particular examples. We also study how the theory affects the propagation of gravitational waves in a cosmological background.G. C. and L. M. are supported by the I þ D Grant
No. FIS2017-86497-C2-2-P of the Spanish Ministry of
Science, Innovation and Universities
A Fuzzy Topic Modeling Approach to legal corpora
No full textThis study investigates the application of Fuzzy Latent Semantic Analysis (fLSA) in analyzing expenditure chapters within legal texts, using Italy’s budget law 178/2020 as a case study. Faced with challenges in legal studies, such as specialized language and heterogeneity, fLSA combines Latent Semantic Analysis (LSA) with dimensionality reduction and soft clustering. Results show comparable performance with the widely used Latent Dirichlet Allocation (LDA) in identifying coherent expenditure chapters, with fLSA showing a tendency to retrieve more distinctive and exclusive topics
Super-accelerating bouncing cosmology in asymptotically free non-local gravity
No full textRecently, evidence has been collected that a class of gravitational theories with certain non-local operators is renormalizable. We consider one such model which, at the linear perturbative level, reproduces the effective non-local action for the light modes of bosonic closed string-field theory. Using the property of asymptotic freedom in the ultraviolet and fixing the classical behavior of the scale factor at late times, an algorithm is proposed to find general homogeneous cosmological solutions valid both at early and late times. Imposing a power-law classical limit, these solutions (including anisotropic ones) display a bounce, instead of a big-bang singularity, and super-accelerate near the bounce even in the absence of an inflaton or phantom field
The need of a clinically oriented reporting of 18F-FDG PET/CT in non-small cell lung cancer (NSCLC)
No full textPurpose: In the present review, we aimed to underline the importance of a clinically oriented PET reporting through the discussion of critical aspects that affect the impact of PET in NSCLC patients. Methods: Cornerstones for PET reporting related to staging of NSCLC after the publication of the new 8th edition of TNM and emerging issues related to locally advanced disease, to restaging and to response evaluation to innovative therapies are listed and specifically commented. Results: 18F-FDG PET/CT imaging has a prominent role in NSCLC patients both prior to surgery and when evaluating for metastatic disease. The benefit is even most marked in patients at greater risk of distant metastases. In this framework, for patients with stage III, PET imaging has the potential to result in a stage-shift through the identification of asymptomatic occult distant metastases, thus highlighting unexpected stage IV patients. The final PET report is influenced by factors that lie outside the acquired images, from the clinical information available at the time of reporting to the capability of linking these clinical details to further decision-making especially in the settings of response to new therapies. Conclusion: A multidisciplinary approach to cancer patients has a significant impact in their management and outcome. A clinically-oriented report is needed to transfer the relevant information to the clinician to fully exploit PET potential in NSCLC
Controllo delle deformazioni secondo un approccio Bayesiano: studio della frana di Roccaspinalveti (Chieti)
No full textNeural correlates of psychodynamic psychotherapy in borderline disorders--a pilot investigation.
No full textEnvironmental influences Produce functional modifications
in neural systems [1]. Psychotherapy, that can produce behavioral
and psychological changes byverbal communication and interperson;
l relation, affects the brain, but how [2]
Combined femoro-distal endovascular revascularisation and plastic reconstruction with free-flap transfer in large ischemic ulcers of lower limbs
No full textBackground. Diabetic patients with lower limb critical ischemia and large trophic lesions in most cases require above or below knee amputation. Combined vascular infrainguinal revascularisation and microvascular free flap transfer allow, in selected cases, the preservation of limb function. Methods. In this study we report our experience of 3 diabetic patients with large trophic lesions of the lower limbs treated, in the past year, with endovascular femorotibial revascularisation combined with free-tissue transfer. The revascularisation procedures consisted of tibial PTA in 2 cases and superficial femoral PTA in 1 case. The plastic reconstruction was made using free-flap muscle tissue with skin graft. Results. Functional limb salvage was achieved in 2 patients, whereas 1 patient underwent an above-knee amputation following local infective complications at 10 months. Conclusions. These results are encouraging and in selected cases this combined procedure may offer an alternative treatment to amputation. However, the complexity of this technique not only involves the surgical operation itself, but also the postoperative care. Close collaboration between the vascular surgeon, plastic surgeon and physician is important to plan the surgical strategy and patient care
The surgical treatment of the first carpometacarpal joint arthritis: evaluation of 400 consecutive patients treated by suspension arthroplasty
No full textArthritis of the first carpometacarpal joint is a widespread disease in Western countries. It affects predominantly women with marked impairment in daily life activities. Its aetiopathogenesis is well described, while its treatment still controversial. The authors report their experience with 400 consecutive patients with established clinical and radiological findings of carpometacarpal joint arthritis treated by suspension arthroplasty with Ceruso's modified Weilby's technique. At 12 months follow-up, we were able to assess 315 patients using MAYO's score pre- and post-operatively, obtaining 86 excellent results, 134 good, 62 fair and 33 poor. As for complications, there were seven infections, 32 persistent pain and 42 limited range of motion. According to our experience the treatment modality of suspension arthroplasty with Ceruso's modified Weilby's technique represents the procedure of choice in indicated cases of first carpometacarpal joint arthritis in advanced stages according to Eaton-Littler classification
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