cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Investigation of zebrafish gills as a model to study respiratory immunology
Creators: name: Wane, Madina
Publisher: name: Imperial College London
Year: 2020

description: Respiratory viral infections are routinely studied with animal models or in vitro culture which mimic but do not fully recapitulate elements of human immune responses or pathology. Studying events at the respiratory mucosa where infection is established is crucial to further our understanding of immune responses to these infections. In this thesis I evaluated the zebrafish gills as a novel in vivo model to study respiratory immunity. Using transgenic zebrafish, flow cytometry and several microscopy techniques I characterized immune cell composition and function in this tissue. In addition, I assessed the stimulatory effects of pathogen mimetics and derivatives on immune response pathways using RNA analysis. The stimulatory and pathological effects of live viral challenges were also assessed. These experiments highlighted the abundance and diversity of innate and adaptive immune cells in the gills from early to adult developmental stages. Some of these immune cells were capable of antigen-uptake and formed dynamic cell-cell interactions. Aggregates of T and B cells were identified as interbranchial lymphoid tissue which had some similarities but also some architectural differences to mammalian mucosal-associated lymphoid tissue. Different responses were stimulated by resiquimod and lipopolysaccharide highlighting these pathogen-related compounds as tools to interrogate immune pathways in the gills. On the other hand, zebrafish had limited responses to human respiratory or fish-endemic viruses and were resistant to pathological infection. These results highlight zebrafish gills as a useful model to investigate several aspects of immune cell function and inflammation in a respiratory mucosal in vivo setting. Further investigation with pathogens is needed to expand the use of this model for infection studies.
Roughening of two-dimensional interfaces in nonequilibrium phase-separated systems
Creators: name: Toner, John
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: I show that non-equilibrium two-dimensional interfaces between three dimensional phase separated fluids exhibit a peculiar "sub-logarithmic" roughness. Specifically, an interface of lateral extent $L$ will fluctuate vertically (i.e., normal to the mean surface orientation) a typical RMS distance $w\equiv\sqrt{\langle |h(\br,t)|^2\rangle} \propto [\ln{(L/a)}]^{1/3}$ (where $a$ is a microscopic length, and $ h(\br,t)$ is the height of the interface at two dimensional position $\br$ at time $t$). In contrast, the roughness of equilibrium two-dimensional interfaces between three dimensional fluids, obeys $w \propto [\ln{(L/a)}]^{1/2}$. The exponent $1/3$ for the active case is exact. In addition, the characteristic time scales $τ(L)$ in the active case scale according to $τ(L)\propto L^3 [\ln{(L/a)}]^{1/3}$, in contrast to the simple $τ(L)\propto L^3$ scaling found in equilibrium systems with conserved densities and no fluid flow.
description: 4 pages, no figures
Intermittent flow pathways for multiphase flow in porous media: a pore-scale perspective
Creators: name: Spurin, Catherine
Publisher: name: Imperial College London
Year: 2021

description: Subsurface fluid flow is ubiquitous in nature, and understanding the interaction of multiple fluids as they flow within a porous medium is central to many geological, environmental, and industrial processes. It is assumed that the flow pathways of each phase are invariant when modelling subsurface flow using Darcy's law extended to multiphase flow; a condition that is assumed to be valid during steady-state flow. However, it has been observed that intermittent flow pathways exist at steady-state, even at the low capillary numbers typically encountered in the subsurface. In this thesis we use both laboratory-based and synchrotron-based micro-CT imaging to capture the pore-scale flow dynamics that arise when multiple fluids flow simultaneously through the pore space of a rock. Using laboratory-based micro-CT we observed that intermittent flow pathways occur in intermediate sized pores due to the competition between both flowing fluids. This competition moves to smaller pores when the flow rate of the non-wetting phase increases. Intermittency occurs in regions where the non-wetting phase is poorly connected. Intermittency leads to the interrupted transport of the fluids; the impact on flow properties is significant because it occurs at key locations, whereby the non-wetting phase is otherwise disconnected. The amount of intermittency expected during flow is dependent on the capillary number and the viscosity ratio of the fluids. Using fast synchrotron X-ray tomography, with 1~s time resolution, we imaged the pore-scale fluid dynamics as the macroscopic flow transitioned to steady-state, and then during steady-state. We observed distinct behaviour during transient flow, with the intermittent fluid occupancy largest and most frequent during the initial invasion into the rock. Our observations suggest that transient flows require separate modelling parameters. We observed that, during steady-state flow, intermittent fluid transport allows the non-wetting phase to flow through a more ramified network of pores. While a more ramified flow network favours lowered relative permeability, intermittency is more dissipative than laminar flow through connected pathways, and the relative permeability remains unchanged for low capillary numbers, where the pore geometry controls the location of intermittency. As the capillary number increases further, the role of pore structure in controlling intermittency decreases, resulting in an increase in relative permeability. These observations can serve as the basis of a model for the causal links between intermittent fluid flow, fluid distribution throughout the pore space, and its upscaled manifestation in relative permeability.
Additional file 1 of Ketogenic diet aggravates cardiac remodeling in adult spontaneously hypertensive rats
Creators: name: You, Yuehua
name: Guo, Yongzheng
name: Jia, Ping
name: Zhuang, Biaobiao
name: Cheng, Yu
name: Deng, Hongpei
name: Wang, Xiaowen
name: Zhang, Cheng
name: Luo, Suxin
name: Huang, Bi
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology

description: Additional file 1: Table S1: Ingredients of experimental diets. Table S2: Primers for tumor necrosis factor-α (TNFα), IL-1β, interferon γ (IFN-γ), and GAPDH. Figure S1: qRT-PCR was performed to measure the expression of IL-1β, TNF-α, and IFN-γ in the heart of WT and SHRs.
All optical quantum information processing via a single step Rydberg blockade gate
Creators: name: Khazali, Mohammadsadegh
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: One of the critical elements in the realization of the quantum internet are deterministic two-photon gates. This $CZ$ photonic gate also completes a set of universal gates for all-optical quantum information processing. This article discusses an approach to realize high fidelity $CZ$ photonic gate by storing both control and target photons within an atomic ensemble using non-Rydberg electromagnetically induced transparency (EIT) followed by a fast, single-step Rydberg excitation with global lasers. The proposed scheme operates by relative intensity modulation of two lasers used in Rydberg excitation. Circumventing the conventional $π$-gap-$π$ schemes, the proposed operation features continuous laser protection of the Rydberg atoms from the environment noise. The complete spatial overlap of stored photons inside the blockade radius optimizes the optical depth and simplifies the experiment. The coherent operation here is performed in the region that was dissipative in the previous Rydberg EIT schemes. Encountering the main imperfection sources, i.e. the spontaneous emission of the Rydberg and intermediate levels, population rotation errors, Doppler broadening of the transition lines, storage/retrieval efficiency, and atomic thermal motion induced decoherence, this article concludes that with realistic experimental parameters 99.7\% fidelity is achievable.
Il d.lgs. 81/08: genesi ed applicazione della disciplina sulla salute e sicurezza sul lavoro. Alberto Andreani e la sicurezza sul lavoro (in memoria)
Creators: name: (A Cura Di), Paolo Pascucci E Eugenio Sorrentino
Publisher: name: Diritto della sicurezza sul lavoro
Year: 2022

description: In questo scritto sono riproposti gli interventi presentati al webinar del 25 novembre 2021 dedicato alla memoria di Alberto Andreani, alla sua visione della sicurezza sul lavoro e alle problematiche e prospettive del d.lgs. n. 81/2008.
description: Diritto della sicurezza sul lavoro, N. 2 (2021)
Odd mobility of a passive tracer in a chiral active fluid
Creators: name: Poggioli, Anthony R.
name: Limmer, David T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Chiral active fluids break both time-reversal and parity symmetry, leading to exotic transport phenomena unobservable in ordinary passive fluids. We develop a generalized Green-Kubo relation for the anomalous lift experienced by a passive tracer suspended in a two-dimensional chiral active fluid subjected to an applied force. This anomalous lift is characterized by a transport coefficient termed the odd mobility. We validate our generalized response theory using molecular dynamics simulations, and we show that the asymmetric tracer mobility may be understood mechanically in terms of asymmetric deformations of the tracer-fluid density distribution function. We show that the even and odd components of the mobility decay at different rates with tracer size, suggesting the possibility of size-based particle separation using a chiral active working fluid.
description: Letter, 6 pages, 3 figures and Supplemental Material, 4 pages, 2 figures
A Light Weight Protocol to Provide Location Privacy in Wireless Body Area networks
Creators: name: Mana, Mohammed
name: Feham, Mohammed
name: Bensaber, Boucif Amar
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Location privacy is one of the major security problems in a Wireless Body Area Networks (WBANs). An eavesdropper can keep track of the place and time devices are communicating. To make things even worse, the attacker does not have to be physically close to the communicating devices, he can use a device with a stronger antenna. The unique hardware address of a mobile device can often be linked to the identity of the user operating the device. This represents a violation of the user's privacy. The user should decide when his/her location is revealed and when not. In this paper, we first categorize the type of eavesdroppers for WBANs, and then we propose a new scheme to provide the location privacy in Wireless Body Area Networks (WBANs).
description: 11 pages
Tuning and Implementation Variants of Discrete-Time ADRC
Creators: name: Herbst, Gernot
name: Madonski, Rafal
Publisher: name: arXiv
Year: 2022
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Practical implementations of active disturbance rejection control (ADRC) will almost always take place in discretized form. Since applications may have quite different needs regarding their discrete-time controllers, this article summarizes and extends the available set of ADRC implementations to provide a suitable variant for as many as possible use cases. In doing so, the gap between quasi-continuous and discrete-time controller tuning is being closed for applications with low sampling frequencies. The main contribution of this article is the derivation of three different discrete-time implementations of error-based ADRC. It is shown that these are almost one-to-one counterparts of existing output-based implementations, to the point where transfer functions and coefficients can be reused in unaltered form. In this way, error-based implementations become firmly rooted in the established landscape of discrete-time ADRC. Furthermore, it becomes possible to equip error-based variants with windup protection abilities known from output-based ADRC.
Carbon dioxide mediated vasomotion of extra-cranial cerebral arteries : a role for prostaglandins?
Creators: name: Hoiland, Ryan Leo
Publisher: name: University of British Columbia
Year: 2015

description: Cerebrovascular regulation during perturbations in arterial CO₂ is thought to occur solely at the level of the pial vessels. However, recent evidence implicates large extra-cranial cerebral blood vessels in this regulatory process. Although the mechanisms governing CO₂ mediated vasomotion remain unclear, animal and human studies support a large role of prostaglandins. Thus, we examined two hypotheses: 1) vasomotion of the internal carotid artery (ICA) would occur in response to both hyper and hypocapnia; and 2) pharmacological inhibition of prostaglandin synthesis with Indomethacin (INDO; a non-selective cyclooxygenase inhibitor) would reduce the vasomotor response of the ICA to changes in end-tidal PCO₂ (PETCO₂). Using a randomized single-blind placebo controlled study, subjects (n=10) were tested on two occasions. Before and 90-minutes following either oral INDO (1.2mg/kg) or placebo capsule, concurrent measures of beat-by-beat blood flow, velocity and diameter of the ICA were made at rest and during steady state stages (4 min) of iso-oxic hypercapnia (+3, +6, +9mmHg above baseline) and hypocapnia (-3, -6, -9mmHg below baseline). End-tidal forcing was employed for the control of blood gases. To examine if INDO affected ICA vasomotion in a cyclooxygenase inhibition independent manner, a subset of subjects (n=5) were tested before and 45-minutes following oral Ketorolac (0.25mg/kg). During pre-drug testing in the INDO trial, the ICA dilated during hypercapnia at +6mmHg (4.72±0.45 vs. 4.95±0.51mm; P<0.001) and +9mmHg (4.72±0.45 vs. 5.12±0.47mm; P<0.001), and constricted during hypocapnia at -6mmHg (4.95±0.33 vs. 4.88±0.27mm; P<0.05) and -9mmHg (4.95±0.33 vs. 4.82±0.27mm; P<0.001). Following INDO, dilation of the ICA was still observed at +6mmHg (4.50±0.54 vs. 4.57±0.52mm; P<0.05) and +9mmHg (4.50±0.54 vs. 4.61±0.50mm; P<0.01); however, INDO reduced the vasomotor responsiveness by 67±28% (0.045±0.015 vs. 0.015±0.012mm ⋅ mmHgPETCO₂-¹). In the Ketorolac condition, there was no effect of the drug on the vasomotor response to hyper or hypocapnia. We conclude that: 1) changes in PETCO₂ mediate vasomotion of the ICA, 2) inhibition of non-selective prostaglandin synthesis via INDO markedly reduces the vasomotor response to changes in PETCO₂; and 3) INDO may be acting via a mechanism(s) independent of cyclooxygenase inhibition to reduce CO₂ mediated vasomotion.
Protection of multi-inverter based microgrid using phase angle trajectory
Creators: name: Nsengiyaremye, Jerome
Publisher: name: Imperial College London
Year: 2021

description: This thesis presents a simple, yet a clever way of using the current phase angle to develop low bandwidth communication-assisted line protection strategies for medium and low voltage AC microgrids, particularly those with multi-inverter interfaced distributed generators. It is now a trend in both AC transmission and distribution segments of power network that inverters interface renewable energy to the system. Unlike synchronous generators the fault feeding, and control characteristic of these generators are different and mostly influenced by the topology, switching, control deployed in the power electronics interface. The limited and controlled fault current challenges the existing conventional protection schemes. Offering higher power supply reliability and system resilience than conventional radial distribution systems, multi-inverter based microgrids, particularly those with loop and mesh typologies, are characterised by bidirectional power flow. This further constrains traditional protections such that communication-less protection schemes become ineffective for such systems. So unit protection types, such as differential protection, become more technically suitable for such microgrids despite the necessity for a communication system. In this thesis, two current direction based protection schemes for medium voltage islanded microgrids have been developed. The change in current flow direction in a line is detected using the cosine of the positive sequence current phase angle. Expressing the change and no-change of the flow directions as binary states, a low bandwidth communication based protection scheme is proposed comparing the binary states from local and remote ends of the line. To further enhance the scope and reliability of this scheme, a second protection scheme is proposed in Chapter 7 whereby the cosine function is combined with the rate of change of the slope of the phase angle (ROCOSP). This combination allows the detection and isolation of a fault even with the failure of the communication channel between relays protecting a faulted line. Furthermore, these scheme can work together and share the communication infrastructure as primary and backup protections. The performance of these schemes was assessed through simulations of microgrid models developed in Matlab/Simulink.
On spacetime algebra and its relations with negative masses
Creators: name: Debergh, N.
name: Petit, J. -P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences
subject: 81Q65, 81Q05

description: We consider four subsets of the complexified spacetime algebra, namely the real even part, the real odd part, the imaginary even part and the imaginary odd part. This naturally leads to the four connected components of the Lorentz group, supplemented each time by an additional symmetry. We then examine how these four parts impact the Dirac equation and show that four types of matter arise with positive and negative masses as well as positive and negative charges.
description: 21 pages. Reports on Mathematical Physics (2022)
Supplementary document for Large Scale Plasmonic Nanodisk Array as Biosensing Platform Fabricated by Transfer Nanoprinting - 6609524.pdf
Creators: name: Zheng, Yang
name: Li, Lixia
name: Zong, Xueyang
name: Liu, Yufang
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Calculated electric field amplitude profile and SEM image
Short-ranged and short-lived charge-density-wave order and pseudogap features in underdoped cuprates superconductors
Creators: name: Greco, Andrés
name: Bejas, Matías
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The pseudogap phase of high-$T_c$ cuprates is controversially attributed to preformed pairs or to a phase which coexists and competes with superconductivity. One of the challenges is to develop theoretical and experimental studies in order to distinguish between both proposals. Very recently, researchers at Stanford have reported [M. Hashimoto {\it et al.}, Nat. Phys. {\bf 6}, 414 (2010); R.-H. He {\it et al.}, Science {\bf 331}, 1579 (2011)] angle-resolved photoemission spectroscopy experiments on Pb-Bi2201 supporting the point of view that the pseudogap is distinct from superconductivity and associated to a spacial symmetry breaking without long-range order. In this paper we show that many features reported by these experiments can be described in the framework of the t-J model considering self-energy effects in the proximity to a d charge-density-wave instability.
description: 4.1 pages, 6 figures
Qualitative Stability Analysis of Cosmological Parameters in $f(T,B)$ Gravity
Creators: name: Samaddar, Amit
name: Singh, S. Surendra
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the cosmological solutions of $f(T,B)$ gravity using dynamical system analysis where $T$ is the torsion scalar and $B$ be the boundary term scalar. In our work, we assume two specific cosmological models. For first model, we consider $ f(T,B)=f_{0}(B^{k}+T^{m})$, where $k$ and $m$ are constants. For second model, we consider $f(T,B)=f_{0}T B$. We generate an autonomous system of differential equations for each models by introducing new dimensionless variables. To solve this system of equations, we use dynamical system analysis. We also investigate the critical points and their natures, stability conditions and their behaviors of Universe expansion. For both models, we get four critical points. The phase plots of this system are analyzed in detail and study their geometrical interpretations also. In both model, we evaluated density parameters such as $Ω_{r}$, $Ω_{m}$, $Ω_Λ$ and $ω_{eff}$ and deceleration parameter $(q)$ and find their suitable range of the parameter $λ$ for stability. For first model, we get $ω_{eff}=-0.833,-0.166$ and for second model, we get $ω_{eff}=-\frac{1}{3}$. This shows that both the models are in quintessence phase. Further, we compare the values of EoS parameter and deceleration parameter with the observational values.
description: Figures=4; page=17,
Il federalismo fiscale tra principi tributari e prospettive di attuazione
Creators: name: Stradini, Francesca
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2022

description: L’autonomia finanziaria delle Regioni ex art. 119 Cost. ha un ruolo fondamentale ai fini dell’attuazione della Riforma Costituzionale. La ratio è quella di ricercare, nell’ottica dei principi dell’economicità e dell’efficienza, una vera e propria autonomia di entrata alle Regioni. Tuttavia mancano ancora oggi tributi propri e si assiste ancora ad un ruolo effettivo della compartecipazione ai tributi erariali con un forte spinta centralista
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 72 N. 3-4 (2021): Il diritto della resilienza. Legge, società e politiche economiche nel PNRR
Magneto-acoustic waves in sunspots: first results from a new 3D nonlinear magnetohydrodynamic code
Creators: name: Felipe, T.
name: Khomenko, E.
name: Collados, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Waves observed in the photosphere and chromosphere of sunspots show complex dynamics and spatial patterns. The interpretation of high-resolution sunspot wave observations requires modeling of three-dimensional non-linear wave propagation and mode transformation in the sunspot upper layers in realistic spot model atmospheres. Here we present the first results of such modeling. We have developed a 3D non-linear numerical code specially designed to calculate the response of magnetic structures in equilibrium to an arbitrary perturbation. The code solves the 3D nonlinear MHD equations for perturbations; it is stabilized by hyper-diffusivity terms and is fully parallelized. The robustness of the code is demonstrated by a number of standard tests. We analyze several simulations of a sunspot perturbed by pulses of different periods at subphotospheric level, from short periods, introduced for academic purposes, to longer and realistic periods of three and five minutes. We present a detailed description of the three-dimensional mode transformation in a non-trivial sunspot-like magnetic field configuration, including the conversion between fast and slow magneto-acoustic waves and the Alfvén wave, by calculation of the wave energy fluxes. Our main findings are the following: (1) the conversion from acoustic to the Alfvén mode is only observed if the the driving pulse is located out of the sunspot axis, but this conversion is energetically inefficient; (2) as a consequence of the cut-off effects and refraction of the fast magneto-acoustic mode, the energy of the evanescent waves with periods around 5 minutes remains almost completely below the level beta=1; (3) waves with frequencies above the cut-off propagate field-aligned to the chromosphere and their power becomes dominating over that of evanescent 5-minute oscillations, in agreement with observations.
Boron nitride photocatalysts for solar fuel synthesis
Creators: name: Shankar, Ravi Balasubramanian
Publisher: name: Imperial College London
Year: 2020

description: Reshaping our global energy portfolio in light of the rising anthropogenic CO2 emissions is paramount. Solar fuel production via photocatalysis constitutes a sustainable energy generation route, allowing one to harness the abundance of sunlight for CO2 transformation. In this thesis, we develop a new materials platform for boron nitride (BN) photocatalysts in solar fuel synthesis. We present a proof-of-concept for a porous boron oxynitride (BNO) photocatalyst facilitating gas phase CO2 capture and photoreduction, without doping or cocatalysts. We then present two routes to enhance light harvesting and photoactivity in BN: boron- and oxygen doping. Boron doping yielded B-BNO, the first water-stable, photoactive BN material, facilitating liquid phase H2 evolution under deep visible irradiation (λ > 550 nm) and gas phase CO2 photoreduction. In parallel, we demonstrate that tuning the oxygen content in BNO can lower and vary light harvesting to the deep visible region. Using a systematic design of experiments process, we tune and predict the chemical, paramagnetic and optoelectronic properties of BNO. We probe the role of free radicals and paramagnetic states on the photochemistry of BNO using a combined experimental, computational and first-principles approach. The family of BN photocatalysts all exhibit unique paramagnetism, shown to arise from free radicals in isolated OB3 sites, which we unequivocally confirm as the governing state for red-shifted light harvesting and photoactivity in BNO. Finally, we explore a new avenue in BN photocatalyst design and present the first example of semiconducting BNO quantum dots for CO2 photoreduction. The evolution rates, quantum efficiencies, and selectivities of all the BN materials surpassed P25 TiO2 and graphitic carbon nitride - benchmark photocatalysts in the field. Overall, this thesis opens the door to a radically new generation of BN-based photocatalysts for solar fuels synthesis.
Beyond-mean-field theories with zero-range effective interactions. A way to handle the ultraviolet divergence
Creators: name: Moghrabi, K.
name: Grasso, M.
name: Colò, G.
name: Van Giai, N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Zero-range effective interactions are commonly used in nuclear physics and in other domains to describe many-body systems within the mean-field model. If they are used within a beyond-mean-field framework, contributions to the total energy that display an ultraviolet divergence are found. We propose a general strategy to regularize this divergence and we illustrate it in the case of the second-order corrections to the equation of state (EOF) of uniform symmetric matter. By setting a momentum cutoff $Λ$, we show that for every (physically meaningful) value of $Λ$ it is possible to determine a new interaction such that the EOS with the second-order corrections reproduces the empirical EOS, with a fit of the same quality as that obtained at the mean-field level.
description: 4 pages, 4 figures; in press, Phys. Rev. Lett
impatto del PNRR nell’ambito dell’anticorruzione
Creators: name: Ascani, Cecilia
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2022

description: Il presente elaborato vuole offrire preliminari considerazioni in merito al duplice approccio del PNRR nella lotta alla corruzione: la semplificazione e la digitalizzazione delle procedure amministrative e la contestualmente razionalizzazione della legislazione di settore al fine di scongiurare l’insorgenza di fenomeni corruttivi. La normativa introdotta con legge n. 190 del 6 novembre 2012 viene riletta volgendo lo sguardo verso il nuovo strumento di pianificazione introdotto con legge n. 113 del 6 agosto 2021 e finalizzato ad assicurare la qualità e la trasparenza dell’attività amministrativa, nonché migliorare la qualità dei servizi ai cittadini e alle imprese, affinché si proceda a una progressiva semplificazione e reingegnerizzazione dei processi, anche in materia di diritto d’accesso.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 72 N. 3-4 (2021): Il diritto della resilienza. Legge, società e politiche economiche nel PNRR
Rilievi internazionalistici su concorrenza e valori sociali a margine del PNRR
Creators: name: Rossi, Edoardo Alberto
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2022

description: Tra gli specifici aspetti affrontati dalle proposte di riforma della concorrenza contenute nel PNRR figura anche il rapporto tra concorrenza e valori sociali. Benché il PNRR si proponga di tenere conto delle influenze europee e internazionali per assicurare che nei mercati la promozione della concorrenza sia adeguatamente bilanciata con esigenze sociali extraimprenditoriali, sorgono perplessità su alcune lacune normative e sugli strumenti di attuazione scelti nel PNRR, che meritano di essere oggetto di opportune riflessioni
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 72 N. 3-4 (2021): Il diritto della resilienza. Legge, società e politiche economiche nel PNRR
AC electrokinetic phenomena over semiconductive surfaces: effective electric boundary conditions and their applications
Creators: name: Zhao, Cunlu
name: Yang, Chun
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Electrokinetic boundary conditions are derived for AC electrokinetic (ACEK) phenomena over leaky dielectric (i.e., semiconducting) surfaces. Such boundary conditions correlate the electric potentials across the semiconductor-electrolyte interface (consisting of the electric double layer (EDL) inside the electrolyte solutions and the space charge layer (SCL) inside the semiconductors) under AC electric fields with arbitrary wave forms. The present electrokinetic boundary conditions allow for evaluation of induced zeta potential contributed by both bond charges (due to electric polarization) and free charges (due to electric conduction) from the leaky dielectric materials. Subsequently, we demonstrate the applications of these boundary conditions in analyzing the ACEK phenomena around a semiconducting cylinder. It is concluded that the flow circulations exist around the semiconducting cylinder and are shown to be stronger under an AC field with lower frequency and around a cylinder with higher conductivity.
description: 29 pages, 4 figures
Specialità e ordinarietà nei modelli di riforma del diritto amministrativo
Creators: name: Clini, Alberto
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2022

description: Le riforme della amministrazione pubblica si sviluppano oramai con cadenze stagionali, a volte riformando il sistema dell'organizzazione o della attività, altre volte con inserimenti e aggiornamenti normativi che si introducono nelle discipline vigenti. Lo sviluppo informatico e tecnologico coniugato al mantenimento dei vasti settori ricondotti alle attribuzione dell'amministrazione rappresentano le ragioni di una ricerca di modelli organizzativi che perseguano decisioni sempre più rapide, efficienti ed economiche. Tuttavia , queste dinamiche spesso si prestano ad un risultato paradossale, osservabile in ogni contesto procedurale: a volte l'esigenza di innovazione e ammodernamento trovano attuazione in procedimenti "speciali", creati per superare i blocchi e la pesantezza dei procedimenti "ordinari". La conseguenza evidente è di alimentare un sistema disordinato o, in certi casi, premiale verso determinate materie ritenute più rilevanti di altre (come nei casi analizzati di pianificazione urbanistica o di procedure ad evidenza pubblica in materia di appalti): l'occasione offerta dal PNRR vale invece un rinnovato sforzo per semplificare gli assetti amministrativi, a partire da una scelta di modelli organizzativi, prestazionali e decisori che assicurino una attività efficiente ed efficace per tutti i cittadini nella "ordinarietà" di un sistema della pubblica amministrazione
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 72 N. 3-4 (2021): Il diritto della resilienza. Legge, società e politiche economiche nel PNRR
Free-space optical communication systems using on-off keying in atmospheric turbulence
Creators: name: Yang, Luanxia
Publisher: name: University of British Columbia
Year: 2015

description: In this thesis, we focus on the bit-error rate (BER) performance improvements for free-space optical (FSO) communication links operating over atmospheric turbulence channels using on-off keying (OOK). Laser beams employed in these links are subject to scintillation, during their propagation through atmospheric channels, and this can lead to significant BER performance degradation. Such systems can suffer from irreducible error floors that result from the use of demodulation with fixed and unoptimized detection thresholds. The resulting error floors are analyzed for the general case of low and high state offsets (i.e., nonzero extinction ratios). To improve the BER performance, there are three techniques developed in this thesis. The first technique employs electrical signal-to-noise ratio (SNR) optimized detection. The system uses the electrical SNRs to implement adaptive detection thresholds and eliminate the error floors. The system can accommodate operation with nonzero extinction ratios, as it uses the method of moments and maximum likelihood estimation techniques to estimate the low and high state offsets and electrical SNR. The second technique employs source information transformation. Using source information transformation can also eliminate error floors, and it can detect the OOK signal without knowledge of the instantaneous channel state information and probability density function of the turbulence model. It is shown that source information transformation can achieve comparable performance to the idealized adaptive detection system, with greatly reduced implementation complexity. The third technique employs convolutional code. Using convolutional code can mitigate the effects of turbulence induced fading. The BER performance is analyzed for FSO systems using convolutional code and OOK. Through our analysis, it is shown that using convolutional code can improve the BER performance of an FSO system significantly.
Desenvolvimento Territorial, Inovação e Empreendedorismo no Setor Público
Creators: name: Emmendoerfer, Magnus
Publisher: name: Zenodo
Year: 2021
Subjects: Public Policy
Territorial Development
Creativity
Innovation
Entrepreneurship

description: Programa da disciplina ofertada anualmente no primeiro semestre (março a junho) no âmbito do Programa de Pós-graduação em Administração Pública na Universidade Federal de Viçosa (UFV) para alunos efetivos, não vinculados e ouvintes interessados em conteúdos técnico-científicos sobre o tema em voga. Esta disciplina é aberta e seus facilitadores consideram muito relevantes as contribuições advindas de colaboradores externos.
Dynamical Density Fluctuation of Superfluids near Critical Velocities
Creators: name: Kato, Yusuke
name: Watabe, Shohei
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We propose a stability criterion of superfluids in condensed Bose-Einstein systems, which incorporates the spectral function or the autocorrelation function of the local density. Within the Gross-Pitaevskii-Bogoliubov theory, we demonstrate the validity of our criterion for the soliton-emission instability, with use of explicit forms of zero modes of the Bogoliubov equation and a dynamical scaling near the saddle-node bifurcation. We also show that the criterion is applicable to the Landau phonon instability and the Landau roton instability within the single-mode approximation.
description: 4 pages, 1figure
Maladministration e semplifcazione nel cantiere della resilienza
Creators: name: Infantino, Alessio
Publisher: name: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche
Year: 2022

description: Il contributo propone la disamina della strategia di contrasto alla maladministration che trova esplicitazione nel Piano nazionale di ripresa e resilienza. Oltreché la rimodulazione di repressione penale e prevenzione amministrativa, viene indagata la semplificazione quale rimedio in grado di abbinare efficienza e contrasto alla corruzione: opzione di politica criminale che realizza in concreto il dover essere della sussidiarietà penalistica.
description: Studi Urbinati, A - Scienze giuridiche, politiche ed economiche, V. 72 N. 3-4 (2021): Il diritto della resilienza. Legge, società e politiche economiche nel PNRR
Casimir Tests of Scalar-Tensor Theories
Creators: name: Brax, Philippe
name: Davis, Anne-Christine
name: Elder, Benjamin
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute bounds and forecasts on screened modified gravity theories, specialising to the chameleon model in Casimir force experiments. In particular, we investigate the classical interaction between a plate and sphere subject to a screened interaction of the chameleon type. We compare numerical simulations of the field profile and the classical pressure exerted on the sphere to analytical approximations for these non-linear field theories. In particular, we focus on the proximity force approximation (PFA) and show that, within the range of sphere sizes $R$ and plate-sphere distance $D$ simulated numerically, the PFA does not reproduce the numerical results. This differs from the case of linear field theories such as Newtonian gravity and a Yukawa model where the PFA coincides with the exact results. We show that for chameleon theories, the screening factor approximation (SFA) whereby the sphere is modelled as a screened sphere embedded in the external field due to the plates, fares better and can be used in the regime $D\gtrsim R$ to extract constraints and forecasts from existing and forthcoming data. In particular, we forecast that future Casimir experiments would corroborate the closing of the parameter space for the simplest of chameleon models at the dark energy scale.
description: 27 pages, 6 figures
MPEC 2025-F220 : 2025 FY13
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 FY13

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Characterizing a supernova's Standing Accretion Shock Instability with neutrinos and gravitational waves
Creators: name: Lin, Zidu
name: Rijal, Abhinav
name: Lunardini, Cecilia
name: Morales, Manuel D.
name: Zanolin, Michele
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We perform a novel multi-messenger analysis for the identification and parameter estimation of the Standing Accretion Shock Instability (SASI) in a core collapse supernova with neutrino and gravitational wave (GW) signals. In the neutrino channel, this method performs a likelihood ratio test for the presence of SASI in the frequency domain. For gravitational wave signals we process an event with a modified constrained likelihood method. Using simulated supernova signals, the properties of the Hyper-Kamiokande neutrino detector, and O3 LIGO Interferometric data, we produce the two-dimensional probability density function (PDF) of the SASI activity indicator and calculate the probability of detection $P_\mathrm{D}$ as well as the false identification probability $P_\mathrm{FI}$. We discuss the probability to establish the presence of the SASI as a function of the source distance in each observational channel, as well as jointly. Compared to a single-messenger approach, the joint analysis results in $P_\mathrm{D}$ (at $P_\mathrm{FI}=0.1$) of SASI activities that is larger by up to $\approx~40\%$ for a distance to the supernova of 5 kpc. We also discuss how accurately the frequency and duration of the SASI activity can be estimated in each channel separately. Our methodology is suitable for implementation in a realistic data analysis and a multi-messenger setting.
description: 24 pages, 15 figures, accepted by PRD
Implication of Jet Physics from MeV Line Emission of GRB 221009A
Creators: name: Zhang, Zhen
name: Lin, Haoxiang
name: Li, Zhuo
name: Xiong, Shao-Lin
name: Zhang, Yan-Qiu
name: Zhang, Qinyuan
name: Yi, Shu-Xu
name: Wang, Xilu
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Ultrarelativistic jets are believed to play an important role in producing prompt emission and afterglow of gamma-ray bursts (GRBs), but the nature of the jet is poorly known owing to the lack of decisive features observed in the prompt emission. The discovery of an emission line evolving from about 37 to 6 MeV in the brightest-of-all-time GRB 221009A provides an unprecedented opportunity to probe GRB jet physics. The time evolution of the central energy of the line with power-law index $-1$ is naturally explained by the high-latitude curvature effect. Under the assumption that the line emission is generated in the prompt emission by $e^\pm$ pair production, cooling, and annihilation in the jet, we can strictly constrain jet physics with observed line emission properties. We find that the radius of the emission region is $r\gtrsim10^{16}$ cm. The narrow line width of $\sim10\%$ requires that the line emission occurs within $\sim10\%$ of the dynamical time, which further implies short timescales of pair cooling to the nonrelativistic state and pair annihilation, as well as a slightly clumpy emission region. If the jet's Lorentz factor is $Γ\gtrsim400$, the fast cooling requirement needs an energy density of magnetic field in the jet much larger than that of prompt gamma rays, i.e., a magnetically dominated jet. The temporal behavior of line flux suggests some angle dependence of line emission. We also discuss the difficulties of other scenarios for the observed emission line.
description: 8 pages, 3 figures. Published in ApJL
Дидактические возможности мобильных компьютерных систем
Creators: name: Мубараков А. М.
name: Шындалиев Н. Т.
name: Зулпыхар Ж. Е.
name: Асанбай М. Б.
name: Абдолдинова Г. Т.
Publisher: name: Colloquium-journal
Year: 2019
Subjects: мобильных обучение
системы
дидактика
сеть
информатция
технология
класиффикация.
mobile learning
systems
didactics
network
information
technology
classification

description: Для успешного развития познавательных способностей школьников в ходе учебной деятельности необходимо искать современные информационные средства и методы обучения. Такие возможности предоставляют нам средства мобильного обучения. В данной статье приводиться анализ такого понятия, как мобильные компьютерные системы и ее составляющих. На основе их выявляется дидактические возможности мобильных компьютерных систем в обучении.
description: For the successful development of cognitive abilities of schoolchildren in the course of learning activities it is necessary to look for modern information tools and teaching methods. Such opportunities provide us with a means of mobile learning. This article provides an analysis of such a thing as mobile computer systems and its components. On the basis of them, the didactic possibilities of mobile computer systems in learning are revealed.
QCD in the delta-Regime
Creators: name: Bietenholz, W.
name: Cundy, N.
name: Gockeler, M.
name: Horsley, R.
name: Nakamura, Y.
name: Pleiter, D.
name: Rakow, P. E. L.
name: Schierholz, G.
name: Zanotti, J. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The delta-regime of QCD is characterised by light quarks in a small spatial box, but a large extent in (Euclidean) time. In this setting a specific variant of chiral perturbation theory - the delta-expansion - applies, based on a quantum mechanical treatment of the quasi one-dimensional system. In particular, for vanishing quark masses one obtains a residual pion mass M_pi^R, which has been computed to the third order in the delta-expansion. A comparison with numerical measurements of this residual mass allows for a new determination of some Low Energy Constants, which appear in the chiral Lagrangian. We first review the attempts to simulate 2-flavour QCD directly in the delta-regime. This is very tedious, but results compatible with the predictions for M_pi^R have been obtained. Then we show that an extrapolation of pion masses measured in a larger volume towards the delta-regime leads to good agreement with the theoretical predictions. From those results, we also extract a value for the (controversial) sub-leading Low Energy Constant \bar l_3.
description: 10 pages, 6 figures, 1 table. Talk presented at the XIV Mexican School on Particles and Fields, Morelia, November 2010
Perturbed nuclear matter studied within Density Functional Theory with a finite number of particles
Creators: name: Marino, Francesco
name: Colò, Gianluca
name: Roca-Maza, Xavier
name: Vigezzi, Enrico
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Nuclear matter is studied within the Density Functional Theory (DFT) framework. Our method employs a finite number of nucleons in a box subject to periodic boundary conditions, in order to simulate infinite matter and study its response to an external static potential. We detail both the theoretical formalism and its computational implementation for pure neutron matter and symmetric nuclear matter with Skyrme-like Energy Density Functionals (EDFs). The implementation of spin-orbit, in particular, is carefully discussed. Our method is applied to the problem of the static response of nuclear matter and the impact of the perturbation on the energies, densities and level structure of the system is investigated. Our work is a crucial step in our program of ab initio-based nuclear EDFs [Phys. Rev. C 104, 024315 (2021)] as it paves the way towards the goal of constraining the EDF surface terms on ab initio calculations.