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1.
The present work is aimed to extend the knowledge of mechanical properties of sandwich structures used for marine applications
focusing on the possibility to increase the performances of such structures by adding a bonder at the skin/core interface.
Therefore, three sandwich structures that are utilised in different structural components of a yacht were realised by manual
lay-up. The mechanical characterisation was performed by flatwise compressive, edgewise compressive and three point flexural
tests. The tests execution has allowed both to determine the mechanical performances and to understand the fracture mechanisms
that take place when the bonder is added in the stacking sequence of the samples. 相似文献
2.
3.
Giampaolo Bella 《International Journal of Information Security》2010,9(2):83-97
Conformity to prudent design principles is an established approach to protocol correctness although it is not free of limitations.
We term goal availability a design principle that is often implicitly followed, prescribing protocols to aim at principal-centric goals. Adherence
to a design principle is normally established through protocol analysis that is an evaluation of whether a protocol achieves
its goals. However, the literature shows that there exists no clear guidance on how to conduct and interpret such an analysis,
a process that is only left to the analyzer’s skill and experience. Goal availability has the desirable feature that its supporting
protocol analysis can be precisely guided by what becomes a principle of realistic analysis, which we call guarantee availability. It prescribes that the outcome of the analysis, which is the set of guarantees confirming the protocol goals, be practically
applicable by the protocol participants. In consequence, the guarantees must be based on assumptions that the principals have
the capacity to verify. Our focus then turns entirely to protocol analysis, because an analysis conforming to guarantee availability
signifies that the analyzed protocol conforms to goal availability. Existing analysis of (both classical and deployed) protocols
has been reconsidered with the aim of studying their conformity to guarantee availability. Some experiments clarify the relationships
between goal availability and the existing design principles, with particular reference to explicitness. Other experiments
demonstrate that boosting an analysis with guarantee availability generally makes it deeper, unveiling additional protocol
niceties that depending on the analyzer’s skills may remain overseen otherwise. In particular, an established claim about
a protocol (made using a well-known formal method) can be subverted. 相似文献
4.
Giordano D Kavasidis I Spampinato C Bella R Pennisi G Pennisi M 《Computer methods and programs in biomedicine》2012,107(1):4-15
Transcranial magnetic stimulation (TMS) is the most important technique currently available to study cortical excitability. Additionally, TMS can be used for therapeutic and rehabilitation purposes, replacing the more painful transcranial electric stimulation (TES). In this paper we present an innovative and easy-to-use tool that enables neuroscientists to design, carry out and analyze scientific studies based on TMS experiments for both diagnostic and research purposes, assisting them not only in the practicalities of administering the TMS but also in each step of the entire study's workflow. One important aspect of this tool is that it allows neuroscientists to specify research designs at will, enabling them to define any parameter of a TMS study starting from data acquisition and sample group definition to automated statistical data analysis and RDF data storage. It also supports the diagnosing process by using on-line support vector machines able to learn incrementally from the diseases instances that are continuously added into the system. The proposed system is a neuroscientist-centred tool where the protocols being followed in TMS studies are made explicit, leaving to the users flexibility in exploring and sharing the results, and providing assistance in managing the complexity of the final diagnosis. This type of tool can make the results of medical experiments more easily exploitable, thus accelerating scientific progress. 相似文献
5.
Antonino Valenza Chiara Borsellino Luigi Calabrese Guido Di Bella 《Applied Composite Materials》2006,13(4):217-235
Composite materials are widely employed in sailing sports, a possible application is for the mast pole or other sail poles. In the paper the attention is focused on the spinnaker poles mechanical performances; in particular the focus is on axial and ring compressive properties of three different carbon fibre/epoxy resin spinnaker poles, to investigate both the diameter and stacking sequence effect on the mechanical performance of the structure. Starting from the stacking sequence used in the production of a particular spinnaker pole, the effect of a lamina at 0° in the middle of wall thickness is investigated with the purpose to obtain a more stiff structure. Moreover to test the proposed stacking sequence on different size products, a prototype with lower diameter is realized. To properly evaluate axial and ring stiffness, axial compression test and ring stiffness one are performed. Then a numerical model is developed to support the design of the finished product: A simple and versatile numerical analysis (FEA with software ANSYS), by simulating ring stiffness and pull-direction compression tests, is carried out in elastic regime. Such model should be suitable for designing and/or verifying the mechanical performance of pole structures, even though differing from those above described, for materials, geometry and stacking sequence. 相似文献
6.
Absorption and chemopreventive targets of sulforaphane in humans following consumption of broccoli sprouts or a myrosinase‐treated broccoli sprout extract 下载免费PDF全文
7.
Ilona Bella Tio Putra Wendari Novesar Jamarun Nandang Mufti 《Ceramics International》2021,47(6):8014-8019
In this study, a hydrothermal method was applied to synthesize the three-layer Aurivillius phase Sr2Bi2Ta2TiO12 (SBTTO) and Mn-substituted Sr1·5Bi2·5Ta2Ti0·5Mn0·5O12 (SBTTMO), with the use of NaOH as a mineralizer. The crystal structure, morphology, dielectric properties, and the correlation between the structural transformation and dielectric properties were investigated. The XRD data reveal that the SBTTO sample adopts a tetragonal crystal structure with the I4/mmm space group and is then transformed into an orthorhombic structure with the B2cb space group for SBTTMO. The morphology of both samples was observed by SEM, which showed anisotropic plate-like grains. With the Mn substitution, the ferroelectric transition temperature (Tc) significantly increases as the influence of the 6s2 lone pair of Bi3+ increases, and this in turn further induces the relaxor-ferroelectric behavior. Consequently, the increase in Tc confirms the structural transformation from the paraelectric-tetragonal to the ferroelectric-orthorhombic phase. 相似文献
8.
Targeting Serotonin 2A and Adrenergic α1 Receptors for Ocular Antihypertensive Agents: Discovery of 3,4‐Dihydropyrazino[1,2‐b]indazol‐1(2H)‐one Derivatives 下载免费PDF全文
Dr. Guido Furlotti Dr. Maria Alessandra Alisi Dr. Nicola Cazzolla Dr. Francesca Ceccacci Dr. Beatrice Garrone Dr. Tecla Gasperi Dr. Angela La Bella Prof. Dr. Francesca Leonelli Prof. Dr. Maria Antonietta Loreto Dr. Gabriele Magarò Giorgina Mangano Prof. Dr. Rinaldo Marini Bettolo Dr. Emanuela Masini Dr. Martina Miceli Dr. Luisa Maria Migneco Dr. Marco Vitiello 《ChemMedChem》2018,13(15):1597-1607
Glaucoma affects millions of people worldwide and causes optic nerve damage and blindness. The elevation of the intraocular pressure (IOP) is the main risk factor associated with this pathology, and decreasing IOP is the key therapeutic target of current pharmacological treatments. As potential ocular hypotensive agents, we studied compounds that act on two receptors (serotonin 2A and adrenergic α1) linked to the regulation of aqueous humour dynamics. Herein we describe the design, synthesis, and pharmacological profiling of a series of novel bicyclic and tricyclic N2‐alkyl‐indazole‐amide derivatives. This study identified a 3,4‐dihydropyrazino[1,2‐b]indazol‐1(2H)‐one derivative with potent serotonin 2A receptor antagonism, >100‐fold selectivity over other serotonin subtype receptors, and high affinity for the α1 receptor. Moreover, upon local administration, this compound showed superior ocular hypotensive action in vivo relative to the clinically used reference compound timolol. 相似文献
9.
Amaia Bastero Aurora Ruiz Carmen Claver Antonio Bella Barbara Milani Beln Moreno‐Lara FlixA. Jaln BlancaR. Manzano 《Advanced Synthesis \u0026amp; Catalysis》2005,347(6):839-846
The CO/tert‐butylstyrene/ethylene terpolymerization catalyzed by Pd‐(N‐N′) complexes was studied. The results evidence that the olefin preferentially inserted in the terpolymer chain is strictly related to the nature of the nitrogen ligand, mainly to its steric constraints, and not to the kind of ligand. Indeed, slight variations in the backbone of the nitrogen ligands coordinated to palladium allow for the synthesis of terpolymers with a controlled composition. 相似文献
10.
A New Design Paradigm for Smart Windows: Photocurable Polymers for Quasi‐Solid Photoelectrochromic Devices with Excellent Long‐Term Stability under Real Outdoor Operating Conditions 下载免费PDF全文
Federico Bella George Leftheriotis Gianmarco Griffini George Syrrokostas Stefano Turri Michael Grätzel Claudio Gerbaldi 《Advanced functional materials》2016,26(7):1127-1137
A new photoelectrochromic device (PECD) is presented in this work proposing the combination of a WO3‐based electrochromic device (ECD) and a polymer‐based dye‐sensitized solar cell (DSSC). In the newly designed architecture, a photocurable polymeric membrane is employed as quasi‐solid electrolyte for both the ECD and the DSSC. In addition, a photocurable fluoropolymeric system is incorporated as solution‐processable external protective thin coating film with easy‐cleaning and UV‐shielding functionalities. Such new polymer‐based device assembly is characterized by excellent device operation with improved photocoloration efficiency and switching ability compared with analogous PECDs based on standard liquid electrolyte systems. In addition, long‐term (>2100 h) stability tests under continuous exposure to real outdoor conditions reveal the remarkable performance stability of this new quasi‐solid PECD system, attributed to the protective action of the photocurable fluorinated coating that effectively prevents photochemical and physical degradation of the PECD components during operation. This first example of quasi‐solid PECD systems paves the way for a new generation of thermally, electrochemically, and photochemically stable polymer‐based PECDs, and provides for the first time a clear demonstration of their true potential as readily upscalable smart window components for energy‐saving buildings. 相似文献