cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TEMPERATURE PREDICTION OF HIGH PERFORMANCE RACING TYRES - DEVELOPMENT AND VALIDATION OF A PHYSICAL THERMAL MODEL
Creators: name: Giordano, Daniele
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Nel presente lavoro di tesi di dottorato viene illustrato un nuovo modello termico di pneumatico. Il modello, denominato “Thermo Racing Tyre” (TRT), è stato sviluppato nell'ambito di una collaborazione con l'ente "Prestazioni Veicolo" della Gestione Sportiva di Ferrari S.p.A. Il modello è fisico, tridimensionale e tiene conto di tutti i flussi e le generazioni di calore. Sono stati infatti considerati i flussi di calore verso l’aria esterna ed interna, verso la strada nonché quelli omnidirezionali all’interno della stessa gomma. Per le generazioni di calore si è computata l’energia dissipata per attrito all’interfaccia tra lo pneumatico e l’asfalto (Friction Power), e quella dissipata a causa delle deformazioni cicliche (Strain Energy Loss).
Specifiche prove sperimentali sono state realizzate al fine di stimare i parametri termodinamici e la loro dipendenza dalla temperatura.
Il modello è capace di girare in Real Time, caratteristica importante per applicazioni quali i simulatori di guida.
Inoltre, il TRT è in grado di utilizzare sia le forze globali sia quelle locali generate nell'area di contatto con il suolo.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

In the present document the main features of a new physical tyre thermal model are presented. The model, called Thermo Racing Tyre (TRT) was developed in collaboration with the “Car Performance Development” office of the Ferrari S.p.A. Racing Department (Gestione Sportiva).
The model is three-dimensional and takes into account all the heat flows and the generative terms occurring in the tyres. The cooling to the track and to the external air and the heat flows inside the rubber are modelled. Regarding the generative terms, in addition to the friction energy developed in the contact patch, the strain energy loss is evaluated.
Dedicated experimental tests were done in order to estimate the thermodynamic parameters of the rubber and their dependency on the temperature.
The model is able to run in Real Time. This feature is important for applications as the driving simulators.
According to the desired accuracy, the model is able to use the contact patch global forces or the local ones.
1+1+2 gravitational perturbations on LRS class II space-times: Decoupling GEM tensor harmonic amplitudes
Creators: name: Burston, R. B.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper considers gauge-invariant and covariant gravitational perturbations on arbitrary vacuum locally rotationally symmetric (LRS) class II space-times. Ultimately, we derive four decoupled equations governing four specific combinations of the gravito-electromagnetic (GEM) 2-tensor harmonic amplitudes. We use the gauge-invariant and covariant 1+1+2 formalism which Clarkson and Barrett developed for analysis of vacuum Schwarzschild perturbations. In particular we focus on the first-order 1+1+2 GEM system and use linear algebra techniques suitable for exploiting its structure. Consequently, we express the GEM system new 1+1+2 complex form by choosing new complex GEM tensors, which is conducive to decoupling. We then show how to derive a gauge-invariant and covariant decoupled equation governing a newly defined complex GEM 2-tensor. Finally, the GEM 2-tensor is expanded in terms of arbitrary tensor harmonics and linear algebra is used once again to decouple the system further into 4 real decoupled equations.
Reproducibility of Computational Environments for Software Development
Creators: name: Strangfeld, Marvin
Publisher: name: Zenodo
Year: 2022

description: A computational environment is a representation of everything that can influence computations done inside them. This includes computer hardware, operating systems and software libraries. Computational Environments are being used in every step of the software development process. On the workstations of developers for performing development tasks, the CI pipeline that builds and tests the software and on production servers or customer’s machines that run the released product.These environments can be heterogeneous and change over time. This can cause problems, for example when the software application depends on a certain version of a software library to be available. Therefore it is possible that the application runs properly in one computational environment but does not work in another. To solve this problem, computational environments can be made reproducible to a certain degree.In my thesis I provide a theoretical definition of computational environments that is more precise than preceding ones and can be used to create descriptions of real-world computational environments. I also provide a definition of reproducibility of computational environments that helps to argue about the degrees to which an environment can be made reproducible.Following these theoretical foundations I present a catalogue with various approaches to create reproducible computational environments and compare their use cases. These approaches can be used like building blocks to meet different requirements for reproducible computational environments.In the end I present an explorative case study of how a reproducible computational environment can be implemented using a real-world software project at my industry partner Open-Xchange. In this case study I use a subset of the presented approaches that has been selected by leveraging the theoretical definitions to analyze the requirements for this environment.
ACTUALITY OF SPEAKING IN TEACHING ENGLISH
Creators: name: Isroilova, Shokhida
Publisher: name: Zenodo
Year: 2024

description: Іt іs necessаry to use the аchіevements of scіence аnd technology, especіаlly іn the fіelds of lіnguіstіcs, pedаgogy, dіdаctіcs, psycholіnguіstіcs аnd psychology, to іncreаse the effectіveness of the educаtіonаl process. One of the аdvаntаges of the іnnovаtіve educаtіonаl model іs the focus on teаchіng hіgh-level students' personаl motіvаtіon, non-stаndаrd thіnkіng, responsіbіlіty, іnіtіаtіve, аnd the formаtіon of theіr own аttіtude to the events аround them. Such аctіvіtіes help to develop іndependence, creаtіvіty, productіve аnd crіtіcаl thіnkіng, аnd аlso expаnd the educаtіonаl mаterіаl.
Latency-Redundancy Tradeoff in Distributed Read-Write Systems
Creators: name: Ramanathan, Saraswathy
name: Gautam, Gaurav
name: Srinivasan, Vikram
name: Parag, Parimal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Databases (cs.DB)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Data is replicated and stored redundantly over multiple servers for availability in distributed databases. We focus on databases with frequent reads and writes, where both read and write latencies are important. This is in contrast to databases designed primarily for either read or write applications. Redundancy has contrasting effects on read and write latency. Read latency can be reduced by potential parallel access from multiple servers, whereas write latency increases as a larger number of replicas have to be updated. We quantify this tradeoff between read and write latency as a function of redundancy, and provide a closed-form approximation when the request arrival is Poisson and the service is memoryless. We empirically show that this approximation is tight across all ranges of system parameters. Thus, we provide guidelines for redundancy selection in distributed databases.
Search for solar hadronic axions produced by a bremsstrahlung-like process
Creators: name: Kekez, D.
name: Ljubicic, A.
name: Krecak, Z.
name: Krcmar, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We have searched for hadronic axions which may be produced in the Sun by a bremsstrahlung-like process, and observed in the HPGe detector by an axioelectric effect. A conservative upper limit on the hadronic axion mass m_a < 334 eV at 95% C.L. is obtained. Our experimental approach is based on the axion-electron coupling and it does not include the axion-nucleon coupling, which suffers from the large uncertainties related to the estimation of the flavor-singlet axial-vector matrix element.
description: 9 pages, 3 figures; version to appear in PLB
Experimental assessment of the effective friction at the base of granular chute flows on smooth incline
Creators: name: Roche, Olivier
name: Wildenberg, Siet van den
name: Valance, Alexandre
name: Delannay, Renaud
name: Mangeney, Anne
name: Corna, Lucas
name: Latchimy, Thierry
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: We report on direct measurements of the basal force components for granular material flowing down a smooth incline. We investigate granular flows for a large range of inclination angles from teta=13.4° to 83.6° and various gate opening of the chute. We find that the effective basal friction coefficient, muB, obtained from the ratio of the longitudinal force to the normal one exhibits a systematic increase with increasing slope angle and a significant weakening with increasing particle hold-up H (the depth-integrated particle volume fraction). At low angles, the basal friction is slightly less than or equal to tan(teta). The deviation from tan(teta) can be interpreted as a contribution from the side-wall to the overall friction. At larger angles, the basal friction muB saturates at an asymptotic value that is dependent on the gate opening of the chute. Importantly, our data confirm the outcomes of recent discrete numerical simulations. First, for steady and fully developed flows as well as for moderately accelerated ones, the variation of the basal friction can be captured through a unique dimensionless number, the Froude number Fr, defined as Fr=U/(gHcos(teta))^1/2, where U is the mean flow velocity. Second, the mean velocity scales with the particle hold-up H with a power exponent close to 1/4, contrasting with the Bagnold scaling (U~H^3/2).
description: 18 pages, 12 figures
Different Impact of Heart Rate Variability in the Deep Cerebral and Central Hemodynamics at Rest: An in silico Investigation
Creators: name: Scarsoglio, Stefania
name: Ridolfi, Luca
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Heart rate variability (HRV), defined as the variability between consecutive heartbeats, is a surrogate measure of cardiac vagal tone. It is widely accepted that a decreased HRV is associated to several risk factors and cardiovascular diseases. However, a possible association between HRV and altered cerebral hemodynamics is still debated, suffering from HRV short-term measures and the paucity of high-resolution deep cerebral data. We propose a computational approach to evaluate the deep cerebral and central hemodynamics subject to physiological alterations of HRV in an ideal young healthy patient at rest. The cardiovascular-cerebral model was validated and recently exploited to understand the hemodynamic mechanisms between cardiac arrythmia and cognitive deficit. Three configurations (baseline, increased HRV, and decreased HRV) are built based on the standard deviation (SDNN) of RR beats. In the cerebral circulation, our results show that HRV has overall a stronger impact on pressure than flow rate mean values but similarly alters pressure and flow rate in terms of extreme events. By comparing reduced and increased HRV, this latter induces a higher probability of altered mean and extreme values, and is therefore more detrimental at distal cerebral level. On the contrary, at central level a decreased HRV induces a higher cardiac effort without improving the mechano-contractile performance, thus overall reducing the heart efficiency. Present results suggest that: (i) the increase of HRV per se does not seem to be sufficient to trigger a better cerebral hemodynamic response; (ii) by accounting for both central and cerebral circulations, the optimal HRV configuration is found at baseline. Given the relation inversely linking HRV and HR, the presence of this optimal condition can contribute to explain why the mean HR of the general population settles around the baseline value (70 bpm).
description: 16 pages, 9 figures, 5 tables
La maculatura clorotico rugginosa del ciliegio: Studi su funghi e micovirus come possibili agenti eziologici. Evidenza di endofitosi tra ciliegio e Taphrina wiesneri
Creators: name: D'Elia, Ida
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Il lavoro di questa tesi è parte di un progetto di ricerca finanziato dal Ministero delle Politiche Agricole per lo studio della recente malattia delle macchie clorotico-rugginose del ciliegio (CCRS). Una patologia che si propaga rapidamente tra i ciliegi di uno stesso frutteto con effetti letali. Studi precedenti indicavano il coinvolgimento nella patologia sia di un fungo sia di micovirus. I risultati della mia tesi mostrano che il micovirus del genere Chrysovirus si rivela geneticamente solo nelle aree sintomatiche della foglia e non nelle aree asintomatiche circostanti né nelle nervature. Il virus si osserva ad alta concentrazione già in aree con sintomi molto precoci sia come genoma sia come proteina capsidica identificata per analisi di immunorivelazione mediante anticorpi prodotti con un costrutto genetico di antigeni da me progettato. Si è così accertato che la presenza del micovirus è un evento molto precoce e che l’effetto letale non è probabilmente dovuto a propagazione sistemica. Gli studi per identificare un fungo ospite del micovirus, responsabile della CCRS, non hanno portato a risultati conclusivi. Inaspettatamente però le indagini hanno rivelato, per analisi di rDNA e dei geni EF1-α e RBP1, la costante presenza del noto patogeno del ciliegio Taphrina wiesneri in tutti i campioni di foglie e di gemme analizzati, prelevati da ciliegi di varie aree della Campania e della Toscana, in ambienti diversi, seguiti in varie stagioni per 3 anni. Il fungo Taphrina risulta molto numeroso nelle gemme di ciliegio e perfino nelle strutture embrionali di teche polliniche. L’ibridazione in situ su sezioni di gemme di vari ciliegi e le colorazioni specifiche rivelano strutture fungine in posizioni non casuali. La numerosa ed organizzata presenza del fungo patogeno nelle strutture embrionali delle gemme e l’assenza di malattia, suggeriscono una forma di endofitosi, la prima riportata in alberi da frutto. Su una possibile endofitosi tra T. wiesneri e il ciliegio è in via di pubblicazione un lavoro accettato dal J. of Plant Pathology. In parallelo, negli ultimi due anni di dottorato, ho lavorato anche ad un progetto riguardante la eterogeneità genetica nei tessuti di un tumore primario del colon e di un tumore recidivo del colon-retto, di due pazienti. Di questa parte del lavoro non presento relazione. I risultati sono oggetto di un manoscritto (G. Geraci, I. D’Elia, R. del Gaudio and R. Di Giamo) inviato per la pubblicazione a PlosOne, che ha richiesto ulteriori dati che sono attualmente in elaborazione.
Deformational history, stratigraphic correlations and geochemistry of eastern Quesnel terrane rocks in the Crooked Lake area, east central British Columbia, Canada
Creators: name: Bloodgood, Mary Anne
Publisher: name: University of British Columbia
Year: 2010

description: The Eureka Peak are lies within the Quesnel terrane of the Intermontane Belt, adjacent to the Omineca Belt - Intermontane Belt tectonic boundary. It represents a convergent zone between the arc related Quesnel terrane and parautochthonous Barkerville terrane. The terrane boundary is defined by the Eureka thrust Underlying the area are middle Triassic to early Jurassic sedimentary and volcanic rocks, represented by the Quesnel River Group and Takla Group, respectively. Petrologic and geochemical studies of the Takla Group volcanics suggest protoliths of island arc and marginal basin affinities. The Quesnel terrane structurally overlies Hadrynian to early Paleozoic metasediments of the Snowshoe Group (Barkerville terrane). The base of the Quesnel terrane is marked by mylonitized mafic and ultramafic rocks of the Crooked Amphibolite. Correlation of features across the plate boundary has established the structural continuity in the region, and recognition of structural phases common to both terranes which developed in response to plate convergence. The deformational history involves two phases of coaxial folding of a mechanically heterogeneous lithologic sequence, accompanied by extensive pressure solution, and later overprinting by NW trending extensional fractures. Synchronous to F₁, detachment surfaces developed along major stratigraphic contacts due to contrasting Theologies of adjacent lithologies. Second phase deformation established the regional map pattern, folding the detachment surfaces and the tectonic boundary. Synchronous to deformation, regional metamorphism is evidenced by the growth of minerals characteristic of amphibolite fades in the Barkerville terrane, and greenschist fades in the Quesnel terrane. Dissipation of heat from the underlying sequences is suggested by the rapid transition in metamorphic grade observed across the boundary. Cleavage surfaces have acted as a locus along which pressure solution has occurred, providing a pathway for the escape of fluids generated during metamorphism. Deposition of material within extensional fractures occurred throughout the deformational history. Fracturing is prominent adjacent to the Quesnel River Group and Takla Group contact, where the viscosity contrast between the two lithologies provided an effective barrier to extensive fluid flow. Concentration of fluids along the contact may have had a buoying effect on the volcanics, allowing furter eastward translation during deformation.
Risposta adattativa allo stress in Streptococcus thermophilus
Creators: name: Asterinou, Kleopatra
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Streptococcus thermophilus è uno dei batteri lattici più utilizzati nell’ industria alimentare per la produzione di cibi fermentati. In questo lavoro sono stati isolati mutanti di S. thermophilus di alcuni geni noti dalla letteratura per essere indotti in condizioni di stress di natura acida, termica ed osmotica, e di alcuni geni che codificano per prodotti implicati nel processo della trans-traduzione. Sono stati condotti esperimenti sui mutanti per studiarne il fenotipo in diverse condizioni ambientali ed i cambiamenti nel profilo proteico. Il preadattamento termico ed acido, non in tutti i casi migliora l’ adattamento. Dall’ analisi degli SDS-PAGE e 2DE gels, è stato confermato il ruolo regolativi di hrcA e ctsR, soprattutto sui chaperon molecolari. Lo studio del mutante ssrA ci ha permesso di confermare l’ importanza della molecola del tmRNA anche sul adattamento ad alte e basse temperature. I risultati ottenuti e presenti in questa tesi rappresentano uno studio ampio e dettagliato sull’ effetto di mutazioni in geni importanti per la resistenza e l’ adattamento a condizioni ambientali sfavorevoli per il batterio S. thermophilus. La comprensione del fenomeno dell’ adattamento agli stress ambientali e l’ identificazione di molecole coinvolte in tale adattamento potranno essere applicate al miglioramento genetico di ceppi di S. thermophilus utilizzati nel campo delle fermentazioni alimentari.
Mirror-backed dielectric metasurface sensor with ultrahigh figure of merit based on super-narrow Rayleigh anomaly
Creators: name: Wang, Yonghang
name: Xiong, Lei
name: Tian, Ming
name: Li, Guangyuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Plasmonic nanostructures with large local field enhancement have been extensively investigated for sensing applications. However, the quality factor and thus the sensing figure of merit are limited due to relatively high ohmic loss. Here we propose a novel plasmonic sensor with ultrahigh figure of merit based on super-narrow Rayleigh anomaly (RA) in a mirror-backed dielectric metasurface. Simulation results show that the RA in such a metasurface can have a super-high quality factor of 16000 in the visible regime, which is an order of magnitude larger than the highest value of reported plasmonic nanostructures. We attribute this striking performance to the enhanced electric fields far away from the metal film. The super-high quality factor and the greatly enhanced field confined to the superstrate region make the mirror-backed dielectric metasurface an ideal platform for sensing. We show that the figure of merit of this RA-based metasurface sensor can be as high as 15930/RIU. Additionally, we reveal that RA-based plasmonic sensors share some typical characteristics, providing guidance for the structure design. We expect this work advance the development of high-performance plasmonic metasurface sensors.
description: 12 pages, 6 figures, 1 table
ASTRONOMIYANI АXBОRОT TА'LIM MUHITLАRIDАN FОYDАLАNIB О'QITISHNING PЕDАGОGIK SHАRTLАRI
Creators: name: Sayfullayeva, Gulhayo
name: Norqulova, Madina
Publisher: name: Zenodo
Year: 2023

description: Jаmiyаt rivоjlаnishining zаmоnаviy dаvri insоn fаоliyаtining bаrchа sоhаlаrigа kirib bоrаdigаn аxbоrоt оqimlаrining tаrqаlishini tа’minlаydigаn, glоbаl аxbоrоt mаkоnini tаshkil еtuvchi rаqаmli tеxnоlоgiyаlаrning tа’siri bilаn tаvsiflаnаdi. Bu jаrаyоnlаrning uzviy vа muhim qismlаridаn biri sifаtidа uzluksiz tа’lim tizimini rаqаmlаshtirishni tаqоzо еtаdi.
Analysis of Flow Fields in a Deposition Chamber by a Molecular Approach
Creators: name: Romano, Francesco
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: In this Ph.D Thesis a computing procedure is proposed as possible tool to simulate and analyze the flow field in a thin film deposition apparatus similar to the van de Sanden deposition apparatus at the University of Eindhoven. A sensitivity analysis of test parameters (electrical power supplied to the torch, precursor mass flow rate, thermo-fluid-dynamic quantities at the inlet chamber section by means of different nozzle geometry) on fluidics is evaluated. More over a method is proposed for a very preliminary evaluation of the film thickness distribution on the substrate and the influence of the above test parameters on film distribution is carried out. The computing procedure is based on two codes working in tandem. The first code is a pre-processor and simulates the flow field in the torch, where Argon is ionized according to the Saha’s equation and in part of the nozzle. The second code is the commercial DS2V code based on Direct Simulation Monte Carlo method and simulates the flow field in the remaining part of nozzle and in the whole chamber. Gas is a mixture of 21 chemical species and 24 chemical reactions from Argon plasma and Acetylene are implemented in both codes. Results show that the effects of the electrical power as well as of the mass flow rate look to be not very strong on the shock wave intensity, while are not negligible on the shock wave thickness. For what concern the film distribution, the sensitivity analysis verifies that the higher is electrical power and the precursor mass flow rate, the ticker and less uniform is the film.
Strontium-releasing mesoporous bioactive glasses with anti-adhesive zwitterionic surface as advanced biomaterials for bone tissue regeneration
Creators: name: Pontremoli, Carlotta
name: Izquierdo-Barba, Isabel
name: Montalbano, Giorgia
name: Vallet-Regi, Maria
name: Vitale-Brovarone, Chiara
name: Fiorilli, Sonia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Hypothesis The treatment of bone fractures still represents a challenging clinical issue when complications due to impaired bone remodelling (i.e. osteoporosis) or infections occur. These clinical needs still require a radical improvement of the existing therapeutic approach through the design of advanced biomaterials combining the ability to promote bone regeneration with anti-fouling/anti-adhesive properties able to minimise unspecific biomolecules adsorption and bacterial adhesion. Strontium-containing mesoporous bioactive glasses (Sr-MBG), able to exert a pro-osteogenic effect by releasing Sr2+ ions, have been successfully functionalised to provide mixed-charge surface groups with low-fouling abilities. Experiments Sr-MBG have been post-synthesis modified by co-grafting hydrolysable short chain silanes containing amino (aminopropylsilanetriol) and carboxylate (carboxyethylsilanetriol) moieties to achieve a zwitterionic zero-charge surface and then characterised in terms of textural-structural properties, bioactivity, cytotoxicity, pro-osteogenic and low-fouling capabilities. Findings After zwitterionization the in vitro bioactivity is maintained, as well as the ability to release Sr2+ ions capable to induce a mineralization process. Irrespective of their size, Sr-MBG particles did not exhibit any cytotoxicity in pre-osteoblastic MC3T3-E1 up to the concentration of 75 ug/mL. Finally, the zwitterionic Sr-MBGs show a significant reduction of serum protein adhesion with respect to pristine ones. These results open promising future expectations in the design of nanosystems combining pro-osteogenic and anti-adhesive properties.
description: 26 pages, 8 figures
MAPK dysregulation in the brain pathology of mucopolysaccharidosis IIIB disease
Creators: name: Cecere, Francesca
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: The accumulation of heparan sulfate (HS) in lysosomes is the primary consequence of the enzyme defect (α-N-acetylglucosaminidase) in Mucopolysaccharidosis type IIIB. This accumulation triggers a cascade of pathological events that progressively leads to CNS pathology. Here we examined the activation of the three major stress kinases in the neuronal tissue of a murine model of the disease. ERK1/2 was significantly higher in the cortex of 1-2-month-old affected animals compared to wild type (Wt) littermates. Similarly, ERK 1/2 was stimulated in neurons cultured from MPS IIIB mice. SAPK/JNK was also found to be activated in the cortex of 1-2-month-old affected animals compared to Wt subjects, and the same was found for cultured neurons. In contrast, the active form of p38MAPK was lower in the cortex of 1-month-old MPS IIIB mice compared to Wt animals, but no significant difference was found between the two p38MAPK analyzed in normal and affected neurons cultured in vitro. The differential activation of these kinases in the mouse brain at a very early stage of the disease course suggests a selective stress signature imposed by the lysosomal dysfunction.
Evolution with hole doping of the electronic excitation spectrum in the cuprate superconductors
Creators: name: Wilson, John A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The recent scanning tunnelling results of Alldredge et al on Bi-2212 and of Hanaguri et al on Na-CCOC are examined from the perspective of the BCS/BEC boson-fermion resonant crossover model for the mixed-valent HTSC cuprates. The model specifies the two energy scales controlling the development of HTSC behaviour and the dichotomy often now alluded to between nodal and antinodal phenomena in the HTSC cuprates. Indication is extracted from the data as to how the choice of the particular HTSC system sees these two basic energy scales (cursive-U, the local pair binding energy and, Delta-sc, the nodal BCS-like gap parameter) evolve with doping and change in degree of metallization of the structurally and electronically perturbed mixed-valent environment.
description: 19 pages, 5 figures
RESEZIONI COLO-RETTALI LAPAROSCOPICHE CON SINGOLO ACCESSO NELL'ENDOMETRIOSI PELVICA PROFONDA: INIZIALE ESPERIENZA
Creators: name: Bracale, Umberto
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Nelle resezioni colorettali totalmente laparoscopiche, è necessario introdurre in addome da 3 a 5
trocars oltre che effettuare una piccola minilaparotomia per l’estrazione del pezzo operatorio.
Le colectomie laparoscopiche con singolo accesso (SILC) in linea teorica potrebbero produrre una
serie di vantaggi rispetto alla chirurgia tradizionale laparoscopica.
Dal Gennaio alla fine del settembre 2010 abbiamo operato 35 pazienti con una diagnosi accertata di
endometriosi pelvica profonda (stadio IV secondo la classificazione di Adayam), effettuando una
resezione colorettale laparoscopica associata o meno ad altre procedure.
6 pazienti sono state sottoposte alla medesima tipologia di intervento, emicolectomia sinistra o
resezione anteriore del retto, utilizzando un singolo accesso laparoscopico.
Il tempo operatorio medio è stato di 146,6 (range 110-190) minuti.
In nessun caso è stata necessaria una conversione in laparoscopia convenzionale, né in laparotomia.
Non sono stati utilizzati fili di sutura transaddominali per la trazione sui visceri. In soli 2 casi
abbiamo preferito confezionare una ileostomia di protezione sul fianco destro, poi chiusa nel
successivo mese in seguito a controllo radiologico dell’anastomosi, negativo per fistole e/o stenosi.
La lunghezza media dell’incisione ombelicale è stata di 3.7 cm (range 3-4.5)
Non ci sono state complicanze intra e post-operatorie, mortalità o reinterventi entro i 30 giorni, ad
eccezione delle chiusure delle ileostomie per ricanalizzazione intestinale. Nella paziente sottoposta
a reimpianto ureterale, al follow-up (cistografia) residua un reflusso vescico-ureterale di I grado.
La lunghezza media dell’intestino asportato è stata di 25.9 cm (range 18-30).
In definitiva, pur ricoscendo alla SILS ipotetici vantaggi rispetto alla chirurgia laparoscopica
convenzionale, non siamo convinti che possa raggiungere, ad oggi, una percentuale di utilizzo
elevata nella pratica quotidiana, anche e soprattutto alla luce del fatto che la percentuale di
interventi di chirurgia colorottele laparoscopica convenzionale, a venti anni dal primo intervento,
non risulta ad oggi essere elevatissima.
Retention and Deformation of the Blue Phases in Liquid Crystalline Elastomers
Creators: name: Schlafmann, Kyle R.
name: White, Timothy J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The blue phases are observed in highly chiral liquid crystalline compositions that nascently organize into a three-dimensional, crystalline nanostructure. The periodicity of the unit cell lattice parameters is on the order of the wavelength of visible light and accordingly, the blue phases exhibit a selective reflection as a photonic crystal. Here, we detail the synthesis of liquid crystalline elastomers (LCEs) that retain blue phase I, blue phase II, and blue phase III. The mechanical properties and deformation of LCEs retaining the blue phases are contrasted to the cholesteric phase in fully solid elastomers with glass transition temperatures below room temperature. Mechanical deformation and chemical swelling of the lightly crosslinked polymer networks induces lattice asymmetry in the blue phase LCE evident in the tuning of the selective reflection. The lattice periodicity of the blue phase LCE is minimally affected by temperature. The oblique lattice planes of the blue phase LCEs tilt and red-shift in response to mechanical deformation. The retention of the blue phases in fully solid, elastomeric films could enable new functional implementations in photonics, sensing, and energy applications.
Struttura e genesi del pensiero di Richard Avenarius
Creators: name: Russo Krauss, Chiara
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: The thesis is divided into two parts. The first part is composed by four chapters and reconstructs the philosophical system build by Avenarius in his main works – Die Kritik der reinen Erfahrung and Der Menschliche Weltbegriff – focusing on the topic of language and its role. Moving on from the “naive” perspective, consisting in the mere look around, Avenarius describes the relationships among the main contents of each experience: me, surroundings and other men. A further analysis of these relationships leads to Avenarius' theory of psychophysical connection, seen as the dependence of other men's assertions on their brain. Once stated how the psychic contents depend on the cerebral activity, Avenarius can move his attention to two related problems: the development of knowledge in general and the development of that knowledge whose object is the totality of the existence, the world. This path leads Avenarius to reconstruct the evolution of human thought and the history of philosophy, identifying their basis with the psychophysical mechanisms of brain adaptation to environment.
The second part of the thesis traces Avenarius' philosophy back to its origin. I analyse his early works, as well as his unpublished manuscripts held in his Nachlass, with the aim to show both the influence of Heymann Steinthal on Avenarius' early conceptions and the evolution of these conceptions during the years.
Studio della microflora lattica autoctona del Pecorino di Tramonti: un formaggio artigianale prodotto
nel territorio del Parco Regionale dei Monti Lattari
Creators: name: Mormile, Amalia
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: The natural lactic flora of Tramonti Pecorino, a typical cheese manufactured in the “Lattari mountain” area in the province of Salerno (Italy), was investigated. Particular attention was paid to the assessment of the growth dynamics and to the molecular identification of the indigenous lactic acid bacteria involved in the ripening of this cheese made with raw sheep milk without starter cultures. Two batches of cheese were produced for the trial: the first called Classical Tramonti Pecorino (CTP) and the second called chilli Tramonti Pecorino (CTP1). In total, 4 samples from CTP were taken, the first one on the  manufacturing day and the others on the 39º, 60º and 94º ripening day. Subsequently, 4 samples from CTP1 were taken, the first one on the  manufacturing day and the others on the 30º, 50º and 105° ripening day. Lactobacillus and Lactococcus were enumerated and randomly isolated on MRS and LM17 agar (32ºC x 48h ± 2h -mesophilic flora- and 42°C x 48h ± 2h -thermophilic flora) in both batches of pecorino cheese. The gram positive and catalase negative colony (n. 101 in CTP and n. 67 in CTP1) were genotipically identified by Ribotyping. In CTP the thermophilic lactic flora initial values of  log10 5.2 cfu/g (Lactobacillus) and log10 7.5 cfu /g (Lactococcus) reached the average values of  log10 5.5 cfu/g at the end of ripening. The mesophilic Lactobacillus and Lactococcus showed an initial charge of log10 8.3 cfu /g reaching,  at the end of ripening, the values of log10 5.3 and 6.5 cfu / g. In CTP1, mesophilic Lactobacillus attested on 107 cfu/g during whole ripening time while thermophilic Lactobacillus, at the end of ripening reached 106 cfu/g from initial values of 105 cfu/g; on average, mesophilic and thermophilic Lactococcus attested on 106 cfu/g  from the beginning of ripening.Ribotyping allowed us to detect 4 lactic acid bacteria species in both baches: Enterococcus faecium (69,30% in CTP; 64,17% in CTP1), Lactococcus lactis spp. cremoris (18,81% in CTP; 25,37% in CTP1), Enterococcus faecalis (8,91% in CTP; 5,97% in CTP1), Enterococcus durans (2,97 % in CTP; 4,47% in CTP1). The four species of lactic bacteria identified by Ribotyping show the diversity of indigenous lactic acid bacteria that characterizes both Tramonti Pecorino cheese examinated.
Amenable groups and Hadamard spaces with a totally disconnected isometry group
Creators: name: Caprace, Pierre-Emmanuel
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65; 20E42, 20F50, 43A07

description: Let $X$ be a locally compact Hadamard space and $G$ be a totally disconnected group acting continuously, properly and cocompactly on $X$. We show that a closed subgroup of $G$ is amenable if and only if it is (topologically locally finite)-by-(virtually abelian). We are led to consider a set $\bdfine X$ which is a refinement of the visual boundary $\bd X$. For each $x \in \bdfine X$, the stabilizer $G_x$ is amenable.
description: 15 pages
Single Spin Asymmetry in Inclusive Hadron Production in pp Scattering from Collins Mechanism
Creators: name: Yuan, Feng
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the Collins mechanism contribution to the single transverse spin asymmetry in inclusive hadron production in pp scattering p^{\uparrow}p\to πX from the leading jet fragmentation. The azimuthal asymmetric distribution of hadron in the jet leads to a single spin asymmetry for the produced hadron in the Lab frame. The effect is evaluated in a transverse momentum dependent model that takes into account the transverse momentum dependence in the fragmentation process. We find the asymmetry is comparable in size to the experimental observation at RHIC at \sqrt{s}=200 GeV.
description: references corrected
Galaxy growth in the concordance $Λ$CDM cosmology
Creators: name: Guo, Qi
name: White, Simon D. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We use galaxy and dark halo data from the public database for the Millennium Simulation to study the growth of galaxies in the De Lucia et al. (2006) model for galaxy formation. Previous work has shown this model to reproduce many aspects of the systematic properties and the clustering of real galaxies, both in the nearby universe and at high redshift. It assumes the stellar masses of galaxies to increase through three processes, major mergers, the accretion of smaller satellite systems, and star formation. We show the relative importance of these three modes to be a strong function of stellar mass and of redshift. Galaxy growth through major mergers depends strongly on stellar mass, but only weakly on redshift. Except for massive systems, minor mergers contribute more to galaxy growth than major mergers at all redshifts and at all stellar masses. For galaxies significantly less massive than the Milky Way, star formation dominates the growth at all epochs. For galaxies significantly more massive than the Milky Way, growth through mergers is the dominant process at all epochs. At a stellar mass of $6\times 10^{10}M_\odot$, star formation dominates at $z>1$ and mergers at later times. At every stellar mass, the growth rates through star formation increase rapidly with increasing redshift. Specific star formation rates are a decreasing function of stellar mass not only at $z=0$ but also at all higher redshifts. For comparison, we carry out a similar analysis of the growth of dark matter halos. In contrast to the galaxies, growth rates depend strongly on redshift, but only weakly on mass. They agree qualitatively with analytic predictions for halo growth.
description: 11 pages, 6 figures
Processi creativi e produzione culturale. Uno studio sui giovani artisti a Napoli
Creators: name: Paolino, Enza Maria
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: La tesi presenta uno studio qualitativo sulla produzione artistica giovanile a Napoli. A partire da un approfondimento della letteratura, italiana ed internazionale, sul dibattito che investe la sociologia della cultura e dell'arte, la ricerca sul campo si concentra sui processi creativi dei giovani artisti napoletani, in particolare dei professionisti, cioè di coloro che hanno intrapreso la carriera artistica come attività professionale o come principale scelta di vita. L'indagine, di tipo esplorativo e descrittivo, muove a partire dagli studi di Melucci (1994) sulla creatività.
Qual è il rapporto che i giovani artisti a Napoli instaurano con il contesto di riferimento? Come incide tale rapporto sulle pratiche e sui discorsi dell'arte professionale? Quali sono i discorsi prevalenti e come si inseriscono nel contesto circostante?
Questi sono i principali interrogativi di ricerca da cui parte il presente lavoro.
Schiff Screening of Relativistic Nucleon Electric-Dipole Moments by Electrons
Creators: name: Liu, C. -P.
name: Engel, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show, at leading-order in the multipole expansion of the electron-nucleus interaction, that nucleon electric-dipole moments are completely shielded by electrons so that they contribute nothing to atomic electric-dipole moments, even when relativity in the nucleus is taken into account. It is well known that relativistic electron motion, by contrast, leads to dipole moments that are not screened; we discuss the reasons for the difference.
description: 4 pages, typeset by REVTeX, submitted to PRC
Lo spessore coroideale nel glaucoma cronico semplice misurato con SD-OCT
Creators: name: Finelli, Marialuisa
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: Obiettivo di tale studio è la misurazione dello spessore della coroide in pazienti sani e glaucomatosi utilizzando lo spectral domain OCT/SLO (SD-SLO/OCT).
Lo spessore della coroide è stato misurato in ventuno occhi sani e sedici occhi glaucomatosi. Le misurazioni sono state eseguite a sede subfoveale e ad intervalli di 500 micron dal centro della fovea ai 4 mm nasali e temporali. I vasi coroideali sono stati contati in un’area di 8000 micron in regione maculare Sono stati misurati solo i vasi coroideali con un diametro orizzontale non inferiore ai 155 micron e un diametro verticale non inferiore ai 50 micron.
Lo spessore coroideale medio è maggiore a sede subfoveale, in particolare 343.8 µm (SD ± 29.06) nei pazienti sani e 411.56 µm (SD ± 33.60) (p<0.001) nel gruppo dei pazienti glaucomatosi. C’è una significativa differenza tra lo spessore coroideale subfoveale e lo spessore coroideale in tutte le altre localizzazioni extrafoveali in ogni gruppo eccetto nelle estreme localizzazioni nasali. Il diametro verticale medio è significativamente maggiore negli occhi glaucomatosi (112.18 ± 37.64) rispetto agli occhi sani (103.98 ± 25.67) (p=0.008), mentre l’area del lume vasale è significativamente maggiore negli occhi glaucomatosi (39157.34 ± 21657.23 µm²) rispetto agli occhi sani (43779.84 ± 22874.87 µm²) (p=0,03).
Lo spessore coroideale può essere misurato utilizzando SD-OCT/SLO. Noi abbiamo evidenziato che lo spessore coroideale è aumentato negli occhi glaucomatosi a causa di un aumento sia del diametro verticale sia dell’area del lume vasale negli occhi glaucomatosi. Tutto ciò sembrerebbe coinvolgere la coroide nella patogenesi del glaucoma ad angolo aperto.
Criteri di sostenibilità nella progettazione di edifici: descrizione indicazione di tecnologie attive e passive in alcuni esempi di architetture
Creators: name: Zazzarino, Pietrantonio
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2011

description: SUSTAINABILITY CRITERIA 'IN THE DESIGN OF BUILDINGS: DESCRIPTION - IDENTIFICATION OF ACTIVE AND PASSIVE TECHNOLOGY SOME EXAMPLES OF ARCHITECTURE
Mutation testing: Clustering the mutants
Creators: name: , Basarat
name: , Oprescu
name: , Biesaart
Publisher: name: Zenodo
Year: 2021
Subjects: Mutation testing
Clustering
Mutant clustering
Mutation testing tool

description: Software testing is a crucial part of the software engineering process. A part of software testing is building test suites which contain unit tests. These unit tests are written by developers. As projects grow the test suite grows along. Maintaining and monitoring these test suites is important as they influence the cost of maintenance. For example, a project with a smaller test suite may have a higher maintenance cost as the effect of change has to be measured manually, which can be a time consuming process. Monitoring the quality of test code has shown that tests with lower quality lead to more defect-prone production code. A technique to measure the quality of test code is by measuring the test effectiveness. Measuring the effectiveness of test suites detecting faults is part of the monitoring process. A technique to measure the test effectiveness is mutation testing. Mutation testing is a computationally expensive technique that requires the ability to run tests. Different techniques have been proposed to reduce the cost of mutation testing. One of these techniques is the clustering of mutants. By clustering mutants we can execute less mutants to reduce the cost. Our research consists of two parts in which we cluster mutants. The first part consists of a white box approach and the second part of a black box approach. We conducted a state of the art comparison between three mutation testing tools for Java. Based on this research we selected a mutation testing tool to use in our research. We identified characteristics to represent the mutants such that we can cluster them. For our white box approach we used hierarchical clustering and for our black box approach we trained the fuzzy c-means model. We calculated a weighted mutation score and compared this with the mutation score of a full set of mutants executed. Results show that with hierarchical clustering we can reduce the amount of mutants executed while maintaining the effectiveness. The clusters generated by the machine learning model were less accurate and showed a significant decrease in effectiveness. The machine learning model did not perform as well as the hierarchical clustering. However, more can be done by researching different approaches for training the FCM model and finding the right parameters.
Bose-Einstein condensation of stationary-light polaritons
Creators: name: Fleischhauer, Michael
name: Otterbach, Johannes
name: Unanyan, Razmik G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We propose and analyze a mechanism for Bose-Einstein condensation of stationary dark-state polaritons. Dark-state polaritons (DSPs) are formed in the interaction of light with laser-driven 3-level Lambda-type atoms and are the basis of phenomena such as electromagnetically induced transparency (EIT), ultra-slow and stored light. They have long intrinsic lifetimes and in a stationary set-up with two counterpropagating control fields of equal intensity have a 3D quadratic dispersion profile with variable effective mass. Since DSPs are bosons they can undergo a Bose-Einstein condensation at a critical temperature which can be many orders of magnitude larger than that of atoms. We show that thermalization of polaritons can occur via elastic collisions mediated by a resonantly enhanced optical Kerr nonlinearity on a time scale short compared to the decay time. Finally condensation can be observed by turning stationary into propagating polaritons and monitoring the emitted light.
description: 4 pages, 3 figures