68Ga-DOTANOC and 18F-DOPA PET/CT: a site-specific approach to the imaging of parangliomas of the head and neck and of the abdomen

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Effects on mobility training and de-adaptations in subjects with Spinal Cord Injury due to a Wearable Robot: A preliminary report

open7noopenSale, Patrizio; Russo, Emanuele Francesco; Russo, Michele; Masiero, Stefano; Piccione, Francesco; Calabrò, Rocco Salvatore; Filoni, SerenaSale, Patrizio; Russo, Emanuele Francesco; Russo, Michele; Masiero, Stefano; Piccione, Francesco; Calabrò, Rocco Salvatore; Filoni, Seren

PON Downstream Scheme Supporting Simultaneously Different ONU Categories

We propose a PON downstream scheme simultaneously supporting different categories of ONUs (e.g. different generations), whereby lower-category ONUs employ components with limited bandwidth. Our solution relies upon CDM utilizing Hadamard codes and the spectral properties of its code words. We propose a novel code allocation scheme and provide two optimization approaches by employing an optimized secondary spreading code and a power allocation scheme to improve the system performance

Lo scandalo dell’unicità e le sue conseguenze. La proposta ontologica di Raimon Panikkar // The scandal of the uniqueness and its consequences. The ontological proposal of Raimon Panikkar

L’articolo si propone di analizzare, a partire dall’affermazione di Raimon Panikkar secondo la quale in natura non esistono due cose “uguali”, la proposta ontologia del pensatore catalano e le implicazioni che questa può avere nell’ambito degli studi di fisica. Si noterà, allora, che, focalizzando l’attenzione sulle relazioni come costitutive della stessa unicità di ogni ente, non si genererà alcun attrito tra il riconoscimento di un’unicità connotativa di qualsivoglia ente e le posizioni attuali della meccanica quantistica. In conclusione, la questione della cosa in sé, che da sempre risulta come un punto problematico di qualsiasi riflessione gnoseologica, perde il suo valore di aporeticità una volta che venga posta l’attenzione sulla relazionalità. Quest’ultima, infatti, si va delineando come l’unica autentica possibilità di descrizione e riconoscimento di quelle caratteristiche che definiscono ogni preciso ente nella propria specificità. Solo a partire dalla relazionalità sarà possibile comprendere cosa intende Panikkar quando parla di limite inferiore del pensiero, ossia l’impensato, e di limite superiore, ossia l’impensabile. In una prospettiva di tal genere potrebbe sembrare che non abbia luogo la stessa soggettività, diluentesi nell’intricata trama delle relazioni. Al contrario, però, il soggetto non perde affatto valore, dal punto di vista etico anzi avviene una valorazione evidente della soggettività non più riconosciuta come autofondantesi bensì come nodo di relazioni che implica, per questo, il riconoscimento del valore dell’altro come costitutivo della stessa coscienza individuale. In tal maniera, nonostante la de-sostanzializzazione del soggetto, rimane valida la costituzione del soggetto ma come momento etico che è alla base anche di ogni conoscenza

Successive Interference Cancellation for Bandlimited Channels with Direct Detection

Oversampling increases information rates for bandlimited channels with direct detection, but joint detection and decoding (JDD) is often too complex to implement. Two receiver structures are studied to reduce complexity: separate detection and decoding (SDD) and successive interference cancellation (SIC) with multi-level coding. For bipolar modulation, frequency-domain raised-cosine pulse shaping, and fiber-optic channels with chromatic dispersion, SIC achieves rates close to those of JDD, thereby attaining significant energy gains over SDD and classic intensity modulation. Gibbs sampling further reduces the detector complexity and achieves rates close to those of the forward-backward algorithm at low to intermediate signal-to-noise ratio (SNR) but stalls at high SNR. Simulations with polar codes and higher-order modulation confirm the predicted rate and energy gains.Comment: Submitted to IEEE Journal of Lightwave Technology on December 15, 2022; Resubmitted to IEEE Transactions on Communications on September 9, 2023

Deep Neural Network Equalization for Optical Short Reach Communication

Nonlinear distortion has always been a challenge for optical communication due to the nonlinear transfer characteristics of the fiber itself. The next frontier for optical communication is a second type of nonlinearities, which results from optical and electrical components. They become the dominant nonlinearity for shorter reaches. The highest data rates cannot be achieved without effective compensation. A classical countermeasure is receiver-side equalization of nonlinear impairments and memory effects using Volterra series. However, such Volterra equalizers are architecturally complex and their parametrization can be numerical unstable. This contribution proposes an alternative nonlinear equalizer architecture based on machine learning. Its performance is evaluated experimentally on coherent 88 Gbaud dual polarization 16QAM 600 Gb/s back-to-back measurements. The proposed equalizers outperform Volterra and memory polynomial Volterra equalizers up to 6th orders at a target bit-error rate (BER) of 10 −2 by 0.5 dB and 0.8 dB in optical signal-to-noise ratio (OSNR), respectively

The Evaluation Culture to Build a Network of Competitive Cities in the Mediterranean

The gradual shift of the economic centre of gravity to the east, with the consequent marginalization of the majority parts of Europe, requires an approximation, in a short time, for the Mediterraneans peoples and their cultures to create a common space that will strengthen the interdependencies and complementarities

Concatenated Forward Error Correction with KP4 and Single Parity Check Codes

Concatenated forward error correction is studied using an outer KP4 Reed-Solomon code with hard-decision decoding and inner single parity check (SPC) codes with Chase/Wagner soft-decision decoding. Analytical expressions are derived for the end-to-end frame and bit error rates for transmission over additive white Gaussian noise channels with binary phase-shift keying (BPSK) and quaternary amplitude shift keying (4-ASK), as well as with symbol interleavers and quantized channel outputs. The BPSK error rates are compared to those of two other inner codes: a two-dimensional product code with SPC component codes and an extended Hamming code. Simulation results for unit-memory inter-symbol interference channels and 4-ASK are also presented. The results show that the coding schemes achieve similar error rates, but SPC codes have the lowest complexity and permit flexible rate adaptation.Comment: Accepted for publication in IEEE/OSA Journal of Lightwave Technolog

Bioplastic from Renewable Biomass: A Facile Solution for a Greener Environment

AbstractEnvironmental pollutions are increasing day by day due to more plastic application. The plastic material is going in our food chain as well as the environment employing microplastic and other plastic-based contaminants. From this point, bio-based plastic research is taking attention for a sustainable and greener environment with a lower footprint on the environment. This evaluation should be made considering the whole life cycle assessment of the proposed technologies to make a whole range of biomaterials. Bio-based and biodegradable bioplastics can have similar features as conventional plastics while providing extra returns because of their low carbon footprint as long as additional features in waste management, like composting. Interest in competitive biodegradable materials is growing to limit environmental pollution and waste management problems. Bioplastics are defined as plastics deriving from biological sources and formed from renewable feedstocks or by a variation of microbes, owing to the ability to reduce the environmental effect. The research and development in this field of bio-renewable resources can seriously lead to the adoption of a low-carbon economy in medical, packaging, structural and automotive engineering, just to mention a few. This review aims to give a clear insight into the research, application opportunities, sourcing and sustainability, and environmental footprint of bioplastics production and various applications. Bioplastics are manufactured from polysaccharides, mainly starch-based, proteins, and other alternative carbon sources, such as algae or even wastewater treatment byproducts. The most known bioplastic today is thermoplastic starch, mainly as a result of enzymatic bioreactions. In this work, the main applications of bioplastics are accounted. One of them being food applications, where bioplastics seem to meet the food industry concerns about many the packaging-related issues and appear to play an important part for the whole food industry sustainability, helping to maintain high-quality standards throughout the whole production and transport steps, translating into cleaner and smarter delivery chains and waste management. High perspectives resides in agricultural and medical applications, while the number of fields of applications grows constantly, for example, structural engineering and electrical applications. As an example, bio-composites, even from vegetable oil sources, have been developed as fibers with biodegradable features and are constantly under research