cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Platycerus marginalis Casey 1897
Creators: name: Paulsen, M. J.
name: Caterino, Michael
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lucanidae
Platycerus
Platycerus marginalis

description: Platycerus marginalis Casey, 1897: 639. Fig. 4. USA: CA: Alpine, Amador, Butte, El Dorado, Glenn, Inyo, Lassen, Mariposa, Mono, Nevada, Placer, Plumas, Trinity, Tulare, Tuolumne, Shasta, Siskiyou. Also AZ, ID, NV, OR, UT, WA. Canada: BC.
description: Published as part of Paulsen, M. J. & Caterino, Michael, 2009, The Platycerus (Coleoptera, Lucanidae) of California, with the recognition of Platycerus cribripennis Van Dyke as a valid species, pp. 89-94 in ZooKeys 8 (8) on page 93, DOI: 10.3897/zookeys.8.118, http://zenodo.org/record/576445
The CBX7 protein, whose expression is decreased in human carcinomas, positively regulates E-cadherin expression by interacting with the HDAC2 protein.
Creators: name: Bianco, Mimma
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: CBX7, chromobox homolog 7, is a chromobox family protein encoding a novel Polycomb protein, component of the Polycomb repressive complex 1 (PRC1). The Polycomb group (PcG) proteins are epigenetic transcriptional repressors involved in the control of cellular proliferation and oncogenesis. CBX7 protein levels show a progressive reduction, well related with the malignant grade of the thyroid neoplasias. Indeed, its expression decreased in an increasing percentage of cases going from benign adenomas to papillary, follicular and anaplastic thyroid carcinomas. To elucidate the function of CBX7 in carcinogenesis, we searched for CBX7 interacting proteins by a proteomic analysis. By this approach, we identified several proteins among which we selected Histone Deacetylase 2 (HDAC2) that is well known to play a key role in neoplastic cell transformation and to downregulate E-cadherin expression, whose loss is a critical event in the Epithelial-Mesenchymal Transition, and therefore emerging as one of the caretakers of the epithelial phenotype. We confirmed by co-immunoprecipitation that CBX7 physically interacts with the HDAC2 and demostrated that is able to inhibit its activity. Then, we showed that both these proteins bind the E-cadherin promoter, and that CBX7 is able to upregulate E-cadherin expression. Consistent with these data we found a positive statistical correlation between CBX7 and E-cadherin expression in human thyroid carcinomas. Finally, we demonstrated that the expression of CBX7 increases the acetylation status of the histones H3 and H4 on the E-cadherin promoter. Therefore, the ability of CBX7 to positively regulate E-cadherin expression, by interacting with HDAC2 and inhibiting its activity on the E-cadherin promoter, would account for the correlation between the loss of CBX7 expression and a highly malignant phenotype in thyroid cancer patients. Thus, several important interacting proteins of CBX7 and the pathways in which they are involved strongly suggest that CBX7 can be considerated a very important regulator of thyroid malignant transformation.
Dynamics of D3-D7 Brane Inflation in Throats
Creators: name: Chen, Fang
name: Firouzjahi, Hassan
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Dynamics of D3-branes in models of warped D3-D7 inflationary set up is studied where perturbative $α'$ correction to the Kähler potential and the nonperturbative corrections to the superpotential are included. It is shown that a dS minimum can be obtained without introducing anti-branes. Some specific configurations of D7-branes embedding were studied. After stabilizing the angular directions, it is shown that the resulting D3-D7 potential of the radial position of the D3-brane is too steep to allow slow-roll inflation. Depending on D7-branes embedding and the stabilized angular directions, the mobile D3-brane can move either towards the tip of the throat or towards the D7-branes.
description: minor changes, to appear in JHEP
title:  Fattori di rischio macroeconomici e rendimenti delle strategie di portafoglio: ipotesi teoriche ed evidenza empirica
Creators: name: Matteucci, Paolo
name: Venanzi, Daniela
Publisher: name: RomaTrE-Press
Year: 2023

description: From Fama-French (1993) and Carhart (1997) studies, which identify size, value, and momentum factors in addition to market risk as significant drivers of stock returns, the micro-finance research addressed the measurement of macroeconomic factors’ impacts on returns of portfolio strategies based on these multi-factor models. These analyses could be crucial in explaining the low or negative correlation often found in literature between the returns of such strategies (Cooper-Priestley 2009; Avramov et al. 2012; Asness et al. 2013; Wisniewski-Jackson 2020; Dahlquist-Hasseltoft 2020). The contribution of this paper is twofold: i) to explain the theoretical foundation of expected impacts of the main macroeconomic factors on the returns of value and momentum strategies regarding equity and bond asset classes; ii) to verify whether these relationships are supported (in terms of sign and statistical significance) by the most recent empirical literature. The analysis shows that: i) univocal hypotheses on the expected links cannot be formulated; the causes of persistent returns of the two strategies, in fact, can be explained by adopting different theoretical perspectives, behavioural vs risk-premium models, which assume different linkages with macroeconomic factors; ii) the empirical findings are mixed; they could be also explained by differences, among studies, in country samples (Continental Europe, Emerging Markets, UK, Developed Asia, and USA), time periods, and testing methodology used. Nonetheless, the provided literature review is useful in delineating a comprehensive framework of the expected and empirically observed links.
description: Giornate della Ricerca del Dipartimento di Economia di Roma Tre
microRNA expression and function in Embryonic Stem Cells: miR-100, miR-137 and miR-34a are required for ESC differentiation
Creators: name: Tarantino, Carolina
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Given their capacity to self-renew and differentiate efficiently into the different cell types, Embryonic Stem Cells (ESCs) provide a valid model to understand the complex network of signaling interactions in the mammalian embryo and open up new possibilities for cell therapy. So a deeper understanding of the molecular mechanisms that regulate generation, self-renewal and differentiation of ESCs is become crucial not only to fulfill their clinical promise but also to get insight into the molecular mechanisms controlling early events of mammalian development. The emergence of microRNAs (microRNAs) as potent regulators of gene expression at the post-transcriptional level has broad implications in all facets of biology, including ESCs and early development.
In recent years, the role of microRNAs in ESCs and mammalian embryogenesis has begun to be explored but specific roles of the microRNAs in the regulation of ESC specific fate are still largely unknown. In this context, our interest is to identify microRNAs regulating ESC functions. We performed a systematic comparison of microRNA expression in undifferentiated versus differentiating mouse ESCs. We report that different microRNAs are increased upon the induction of differentiation. We compared the entire list of candidate mRNA targets of upregulated microRNAs with that of mRNA dowregulated in ESCs upon the induction of differentiation. Among the candidate targets emerged from this analysis, we found three genes Smarca5, Jarid1b and Sirt1, previously demonstrated to be necessary to sustain the undifferentiated phenotype in ESCs. On this basis, we first demonstrated that Smarca5 is a direct target of miR-100, Jarid1b of miR-137 and confirmed previously published data demonstrating that Sirt1 is a direct target of miR-34a in a different context. The suppression of these three microRNAs by anti-miRs caused block of ESC differentiation induced by LIF withdrawal. On the other hand, the overexpression of the three microRNAs resulted in an altered expression of differentiation markers. These results demonstrated that miR-100, miR-137 and miR-34a are required for proper differentiation of ESCs, and that they function by targeting, among the others, the mRNAs of Smarca5, Jarid1b and Sirt1.
In conclusion, we have characterized a subset of microRNAs that are necessary for proper differentiation of mouse ESCs. The identification of microRNAs that are up-regulated upon the induction of ESC differentiation suggests that they suppress, directly or indirectly, the expression of genes necessary to maintain ESCs in the undifferentiated state. The identification of targets of the microRNAs that we have studied may provide tools to drive ESC differentiation towards specific lineages.
On the approximate normality of eigenfunctions of the Laplacian
Creators: name: Meckes, Elizabeth
Publisher: name: arXiv
Year: 2007
Subjects: subject: Spectral Theory (math.SP)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: The main result of this paper is a bound on the distance between the distribution of an eigenfunction of the Laplacian on a compact Riemannian manifold and the Gaussian distribution. If $X$ is a random point on a manifold $M$ and $f$ is an eigenfunction of the Laplacian with $L^2$-norm one and eigenvalue $-μ$, then $$d_{TV}(f(X),Z)\le\frac{2}μ\E\big|\|\nabla f(X)\|^2-\E\|\nabla f(X) \|^2\big|.$$ This result is applied to construct specific examples of spherical harmonics of arbitrary (odd) degree which are close to Gaussian in distribution. A second application is given to random linear combinations of eigenfunctions on flat tori.
description: 21 pages
Trojan Stars in the Galactic Center
Creators: name: Fujii, Michiko
name: Iwasawa, Masaki
name: Funato, Yoko
name: Makino, Junichiro
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We performed, for the first time, the simulation of spiral-in of a star cluster formed close to the Galactic center (GC) using a fully self-consistent $N$-body model. In our model, the central super-massive black hole (SMBH) is surrounded by stars and the star cluster. Not only are the orbits of stars and the cluster stars integrated self-consistently, but the stellar evolution, collisions and merging of the cluster stars are also included. We found that an intermediate-mass black hole (IMBH) is formed in the star cluster and stars escaped from the cluster are captured into a 1:1 mean motion resonance with the IMBH. These "Trojan" stars are brought close to the SMBH by the IMBH, which spirals into the GC due to the dynamical friction. Our results show that, once the IMBH is formed, it brings the massive stars to the vicinity of the central SMBH even after the star cluster itself is disrupted. Stars carried by the IMBH form a disk similar to the observed disks and the core of the cluster including the IMBH has properties similar to those of IRS13E, which is a compact assembly of several young stars.
description: 17 pages, 9 figures, accepted for publication in ApJ
Cytotoxic activity of invariant NKT cells in human allergic contact dermatitis
Creators: name: Balato, Anna
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2009

description: Cytotoxic activity of invariant NKT cells in human allergic contact dermatitis Background: The role of cytotoxicity of NKT-cells in the skin is not defined. There are two prototypic skin diseases in which epidermal Keratinocytes (KC) over-express CD1d, a MHC class-I-like molecule that present antigens to NKT-cells, in all layers of the epidermis and which there is infiltration of NKT-cells into the skin: allergic contact dermatitis (ACD) and psoriasis. In both diseases, NKT-cells are found within skin lesions, and within the epidermis in close apposition to CD1d bearing KC. This suggests that there may be direct KC-NKT-cell interactions that can affect the ongoing immune mediated inflammatory response. Purpose: To investigate the cytotoxic activity of invariant NKT cells in the skin and in human allergic contact dermatitis. Materials and methods: Paired skin biopsies from patch test reaction and normal skin were used for qPCR and immunohistochemistry. Calcein release assay was performed with NKT-cells as effector cells and KC as target cells. Results: Invariant NKT-cells are enriched in ACD reactions, but not in normal skin. Gene expression of cytotoxic effector molecules (perforin and granzymes) was higher in ACD lesions compared to normal skin (qPCR). Perforin and granzymes were found in invariant NKT-cells in patch test reactions, where as these molecules were also expressed by other cells, such as CD8+ conventional T-cells and NK-cells. Invariant gene expression of cytotoxic effector molecules is increased when these cells are activated in vitro by glycolipid and potent APC such as CD1d bearing monocytes, and KC in some cases as well. Cytotoxicity of NKT cells is increased versus keratinocytes. Conclusions: Human NKT-cells are in an activated state in ACD, and contribute to the tissue damage of allergic inflammation. These findings indicate that innate immunity plays an important role in the elicitation phase of ACD, and may represent a novel therapeutic target in allergic skin inflammation.
Morale e diritto nel dialogo di civiltà. Fondamenti epistemologici dell'intesa per una giustizia interculturale
Creators: name: Imbriano, Umberto
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2010

description: Questa riflessione origina dalla convinzione della insufficienza dell’articolato giuridico istituzionale come criterio eccentrico di mediazione e risoluzione delle vicende interculturali.Il percorso giuridico incrocia a mezz'altezza dinamiche interindividuali di dialogo e scontro, a volte assai cruento, che lo precedono e lo condizionano grandissimamente.In questa soglia interstiziale si snoda una lotta per il riconscimento che soltanto una lettura comparata della fenomelogia morale e giuridica è deputata e raccogliere e raccontare.
Simulations and interpretation of the 6-cm MERLIN images of the classical nova V723 Cas
Creators: name: Heywood, I.
name: O'Brien, T. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We compare the predictions of simple models for the radio emission from classical novae with the MERLIN radio observations of nova V723 Cas (Nova Cas 1995). Spherically symmetric and ellipsoidal radiative transfer models are implemented in order to generate synthetic emission maps. These are then convolved with an accurate representation of the uv coverage of MERLIN. The parameters and geometry of the shell model are based on those returned by fitting models to the observed light curve. This allows direct comparison of the model images with the nine 6-cm MERLIN images of V723 Cas. It is found that the seemingly complex structure (clumping, apparent rotation) evident in the observations can actually be reproduced with a simple spherical emission model. The simulations showthat a 24-h track greatly reduces the instrumental effects and the synthetic radio map is a closer representation of the true (model) sky brightness distribution. It is clear that interferometric arrays with sparse uv coverage (e.g. MERLIN, VLBA) will be more prone to these instrumental effects especially when imaging ring-like objects with time-dependent structure variations. A modelling approach such as that adopted here is essential when interpreting observations.
description: 11 pages, 15 figures
Platycerus oregonensis Westwood 1844
Creators: name: Paulsen, M. J.
name: Caterino, Michael
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Lucanidae
Platycerus
Platycerus oregonensis

description: Platycerus oregonensis Westwood, 1844: 106. Fig. 5. USA: CA: Alameda, Contra Costa, El Dorado, Humboldt, Kern, Marin, Mariposa, Mendocino, Monterey, Napa, Nevada, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Sierra, Sonoma, Trinity, Tuolumne. Also OR; WA. Canada: BC.
description: Published as part of Paulsen, M. J. & Caterino, Michael, 2009, The Platycerus (Coleoptera, Lucanidae) of California, with the recognition of Platycerus cribripennis Van Dyke as a valid species, pp. 89-94 in ZooKeys 8 (8) on page 94, DOI: 10.3897/zookeys.8.118, http://zenodo.org/record/576445
L’edilizia scolastica: una metodologia di verifica dei livelli di bio-compatibilità e ecosostenibilità
Creators: name: Aulitano, Angelo
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: La tesi, impostata e condotta con rigore metodologico, si inquadra nella tematica generale che ha caratterizzato il XVIII ciclo del dottorato, ed ha affrontato un ambito relativamente poco esplorato, a livello di ricerca: una metodologia di verifica dei livelli di bio-compatibilità e eco-sostenibilità dell’edilizia scolastica.
La ricerca ha infatti, come obiettivo la definizione di indicazioni metodologiche per lo sviluppo di un metodo di valutazione e certificazione degli edifici scolastici e scenari di applicazione nella fase di monitoraggio, adatto alla realtà italiana, ma flessibile ad essere adottato anche in altri paesi, e capace di fornire un riferimento univoco per la valutazione dei progetti alle Amministrazioni Locali e hai progettisti. Questi sono, infatti, i possibili utenti del metodo stesso, in quanto attori principali della promozione di edifici più ecocompatibili di quelli correnti; tramite incentivi economici per interventi che ne diminuiscono gli impatti ambientali.
La ricerca si sviluppa a partire dallo studio del quadro legislativo generale e dei recenti sviluppi normativi per l’edilizia scolastica, poi nell’analisi dei metodi e software di valutazione ambientale più accreditati in ambito internazionale.
Integrazione di dati magnetici e morfobatimetrici in aree marine vulcaniche e non vulcaniche
Creators: name: Passaro, Salvatore
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: L’integrazione delle metodologie magnetica e morfo-batimetrica (“Multibeam swath bathymetry”) produce un significativo miglioramento nell’individuazione potenziale di facies vulcaniche sommerse. La batimetria multifascio è considerata come il metodo più efficace di esplorazione dei fondali, ma non sempre gli elementi forniti dall’analisi morfologica di una zona possono sciogliere tutti i dubbi sulla natura vulcanica di eventuali alti strutturali. D’altro canto, l’importanza nello studio delle anomalie magnetiche residue di una determinata zona e le geometrie delle sorgenti ad esse correlate vengono estremamente rafforzate dal confronto con elementi morfologici acquisiti con altri tipi di indagini (ad es., indagini basate sull’acustica come  sismica a riflessione multicanale per riflessioni molto profonde, sismica monocanale “sparker” , “chirp” o “subbottom” per facies sub-affioranti, multibeam o “side scan sonar” per facies affioranti sommerse). Lo scopo di questa tesi di dottorato risiede nel tentativo di confrontare acquisizioni effettuate con tecniche d'indagine geofisica diverse (metodi magnetico e multibeam) e di valutare eventuali elementi di discussione creati dalla fusione dei contenuti informativi delle due metodologie di indagine. A tal fine sono stati confrontati tre datasets (sia magnetici che batimetrici) relativi a tre situazioni geologiche diverse, ovvero:
1.Isole Flegree, con particolare attenzione ad Ischia
2.Gettysburg seamount (Banco di Gorringe, Horseshoe basin, Oceano Atlantico Orientale)
3.Ormonde (Banco di Gorringe, Horseshoe basin, Oceano Atlantico Orientale).
In sintesi i risultati della tesi riguardano:
•la costruzione di un modello digitale del terreno estremamente dettagliato sul banco di Gorringe e le implicazioni geologiche (in termini di oscillazioni glacio-eustatiche, natura dei seamounts, giacitura delle rocce intrusive e di quelle vulcaniche);
•la descrizione e l’analisi del campo di anomalie generato da rocce del mantello terrestre (sul seamount Gettysburg); tale descrizione è innovativa data la peculiarità del sito; da segnalare, dopo boundary analysis il riconoscimento di patterns magnetici N-S e N10°W che confermano la fabric strutturale e quella magmatica;
•la costruzione di un DTM attorno all’isola d’Ischia ed il potenziale di informazioni derivato (strutturali, morfologiche e vulcanologiche);
•il confronto tra campo di anomalie osservato, elaborazioni successive (riduzioni al polo, continuazione delle anomalie a quote maggiori, boundary analysis) ed il DTM nell’offshore di Ischia evidenzia correlazioni più o meno forti tra sorgenti magnetiche ed il basamento vulcanico sommerso; inoltre evidenzia il forte controllo della tettonica regionale esercitato sul complesso vulcanico ischitano; in particolare due direttrici strutturali anti-appenniniche (E-W e ENE-WSW) sembrano aver guidato la risalita dei magmi;
title:  Gli effetti perversi degli incentivi all’occupazione in Italia: nuove evidenze empiriche
Creators: name: Scarlato , Margherita
name: Patriarca, Fabrizio
name: Santoni , Edoardo
Publisher: name: RomaTrE-Press
Year: 2023

description: Tax credits for job creation in Italy have been the major policy response to employment crises provided by the political majorities alternating at the governments in the last decades. In 2016, an untargeted employer-borne payroll tax cut was introduced to promote permanent hirings. In this paper we use matched employer-employee data and carry out a firm-level analysis of this measure. We estimate individual and firm effects through a standard AKM model to highlight the characteristics and wage-setting policies of the beneficiary firms. The empirical analysis shows that the take-up rate is higher for firms which pay lower wages and are less competitive. This evidence cast doubts on the effectiveness of active labour market policies based on untargeted employerborne payroll tax cuts.
description: Giornate della Ricerca del Dipartimento di Economia di Roma Tre
Regulation of urea synthesis in skate hepatocytes
Creators: name: Nener, Jennifer C.
Publisher: name: University of British Columbia
Year: 2010

description: Urea synthesis and alanine oxidation were measured in skate (Raja erinacea) hepatocytes incubated with pharmacological doses of four hormones: insulin, glucagon, 1α-OH, and 1,2-dehydro-A. Peptide hormones were used only for short (2.25 hours) incubations, while incubations with steroids were 2.25, 24, or 48 hours. None of the hormones exerted any effects on urea synthesis or alanine oxidation during the shortest incubation period, however after 24 hours 1α-OH caused a significant (p<.05) elevation in alanine oxidation, which may be an adaptive response of skates to dilute seawater. Long-term incubation with steroids had no effect on urea synthesis in skate hepatocytes. Urea synthesis, alanine oxidation, and gluconeogenesis were measured in skate hepatocytes incubated in a wide range of osmolarities (50%, 75%, 100%, 112.5%, and 125% of normal plasma osmolarity). Concentration of the incubation medium was altered by varying amounts of urea, NaCl, TMAO, MgSO₄, MgCl₂, and KCl, while NaHCO₃, NaH₂PO₄, CaCl₂, Hepes, and BSA were maintained at constant levels. Urea synthesis was significanty depressed (P<.05) at 50% osmolarity, but did not vary significantly at higher solute concentrations. Gluconeogenesis was significantly elevated (P<.05) at 50% and 75% of normal osmolarity, as was alanine oxidation at 50% osmolarity. Rates of gluconeogenesis and alanine oxidation did not vary significantly at higher solute concentrations. In other experiments osmolarity was maintained at 87-113% while one of the variable solutes was reduced to 50% of standard concentration. In all cases reduction of concentration of one solute failed to cause a depression of urea synthesis. It was concluded that a sharp decrease in osmolarity indices specific adaptive metabolic changes in R. Erinacea hepatocytes.
Dos variantes PKD1 y PKD2 en una misma familia: ¿cuál manda?
Creators: name: Esteban-de-la-Rosa, Rafael-José
Publisher: name: Zenodo
Year: 2022

description: ADPKD is the most prevalent hereditary disease that causes renal failure; Sometimes, genetic diagnosis is decisive and helps us establish a better prognosis and help couples who want to have disease-free children through preimplantation genetic testing (PGT). However, it is often difficult. The situation in which variant families carry heterozygous variants in the PKD1 and PKD2 genes is presented, and their pathogenic nature is discussed.
SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
Creators: name: Kenworthy, W. D.
name: Jones, D. O.
name: Dai, M.
name: Kessler, R.
name: Scolnic, D.
name: Brout, D.
name: Siebert, M. R.
name: Pierel, J. D. R.
name: Dettman, K. G.
name: Dimitriadis, G.
name: Foley, R. J.
name: Jha, S. W.
name: Pan, Y. -C.
name: Riess, A.
name: Rodney, S.
name: Rojas-Bravo, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A spectral-energy distribution (SED) model for Type Ia supernovae (SNe Ia) is a critical tool for measuring precise and accurate distances across a large redshift range and constraining cosmological parameters. We present an improved model framework, SALT3, which has several advantages over current models including the leading SALT2 model (SALT2.4). While SALT3 has a similar philosophy, it differs from SALT2 by having improved estimation of uncertainties, better separation of color and light-curve stretch, and a publicly available training code. We present the application of our training method on a cross-calibrated compilation of 1083 SNe with 1207 spectra. Our compilation is $2.5\times$ larger than the SALT2 training sample and has greatly reduced calibration uncertainties. The resulting trained SALT3.K21 model has an extended wavelength range $2000$-$11000$ angstroms (1800 angstroms redder) and reduced uncertainties compared to SALT2, enabling accurate use of low-$z$ $I$ and $iz$ photometric bands. Including these previously discarded bands, SALT3.K21 reduces the Hubble scatter of the low-z Foundation and CfA3 samples by 15% and 10%, respectively. To check for potential systematic uncertainties we compare distances of low ($0.01
description: 25 pages, 16 figures, 5 tables, to be submitted to ApJ. Code, training data, model, and other documentation available at https://saltshaker.readthedocs.io/en/latest/
The propagator for the step potential and delta function potential using the path decomposition expansion
Creators: name: Yearsley, James M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a derivation of the propagator for a particle in the presence of the step and delta function potentials. These propagators are known, but we present a direct path integral derivation, based on the path decomposition expansion and the Brownian motion definition of the path integral. The derivation exploits properties of the Catalan numbers, which enumerate certain classes of lattice paths.
description: 11 pages, 3 figures
The Optimal Design of Three Degree-of-Freedom Parallel Mechanisms for Machining Applications
Creators: name: Chablat, Damien
name: Wenger, Philippe
name: Majou, Félix
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The subject of this paper is the optimal design of a parallel mechanism intended for three-axis machining applications. Parallel mechanisms are interesting alternative designs in this context but most of them are designed for three- or six-axis machining applications. In the last case, the position and the orientation of the tool are coupled and the shape of the workspace is complex. The aim of this paper is to use a simple parallel mechanism with two-degree-of-freedom (dof) for translational motions and to add one leg to have one-dof rotational motion. The kinematics and singular configurations are studied as well as an optimization method. The three-degree-of-freedom mechanisms analyzed in this paper can be extended to four-axis machines by adding a fourth axis in series with the first two.
On Properties of a Regular Simplex Inscribed into a Ball
Creators: name: Nevskii, Mikhail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 41A05, 52B55, 52C07

description: Let $B$ be a Euclidean ball in ${\mathbb R}^n$ and let $C(B)$ be a space of~continuous functions $f:B\to{\mathbb R}$ with the uniform norm $\|f\|_{C(B)}:=\max_{x\in B}|f(x)|.$ By $Π_1\left({\mathbb R}^n\right)$ we mean a set of polynomials of degree $\leq 1$, i.e., a set of linear functions upon ${\mathbb R}^n$. The interpolation projector $P:C(B)\to Π_1({\mathbb R}^n)$ with the nodes $x^{(j)}\in B$ is defined by the equalities $Pf\left(x^{(j)}\right)= f\left(x^{(j)}\right)$, $j=1,$ $\ldots,$ $ n+1$. The norm of $P$ as an operator from $C(B)$ to $C(B)$ can be calculated by the formula $\|P\|_B=\max_{x\in B}\sum |λ_j(x)|.$ Here $λ_j$ are the basic Lagrange polynomials corresponding to the $n$-dimensional nondegenerate simplex $S$ with the vertices $x^{(j)}$. Let $P^\prime$ be a projector having the nodes in the vertices \linebreak of a regular simplex inscribed into the ball. We describe the points $y\in B$ with the property $\|P^\prime\|_B=\sum |λ_j(y)|$. Also we formulate a geometric conjecture which implies that $\|P^\prime\|_B$ is equal to the minimal norm of an interpolation projector with nodes in $B$. We prove that this conjecture holds true at least for $n=1,2,3,4$. Keywords: regular simplex, ball, linear interpolation, projector, norm
description: 13 pages
IRAP: una questione aperta
Creators: name: Strianese, Loredana
Publisher: name: Università degli Studi di Napoli Federico II
Year: 2006

description: La Tesi: “Irap: una questione aperta”, ha affrontato le problematiche concernenti l’imposta in questione, tentando di apportare un qualche contributo allo studio dei  suoi profili giuridici meno indagati, cioè quelli relativi ai rapporti con il sistema tributario in generale e con quello della finanza regionale, soprattutto alla luce della Riforma del Titolo V della Costituzione che è andata ad inserirsi in un processo di teso a riconoscere in maniera, sempre più marcata, l’autonomia delle Regioni.
Sono stati trattati poi, in particolare, trattati i profili di maggiore criticità dell’imposta sotto il profilo costituzionale.
In tale quadro di riferimento, liddove si è inserita l’annunciata graduale eliminazione dell’Irap e nell’ambito di un più organico disegno di riforma del sistema tributario, è sembrato utile compiere uno studio di questa imposta che ne affrontasse sì, l’esame da un punto teorico, ma anche che cercasse di indagarne la coerenza sistematica rispetto all’intera materia dell’ “autonomia tributaria” delle Regioni, ben potendo, Il tributo in questione, assumere il ruolo di interessante esperienza giuridica nell’ambito degli strumenti utilizzabili dal legislatore anche in vista di una sua trasformazione in un altro tributo regionale.
L’Irap, nell’attuale panorama dei tributi locali, sicuramente costituisce il tributo regionale più rilevante, ove – beninteso in termini relativi e anche in considerazione del fatto che si tratta di un’imposta pensata e voluta dallo Stato e non dalle Regioni – è ben lungi ancora dal rappresentare un autentico tributo regionale proprio, così come è stato puntualizzato anche dalla Corte Costituzionale, esprimente, quindi, quel grado di autonomia che il nuovo assetto costituzionale ha inteso riconoscere agli enti territoriali.
Nell’ultima parte del lavoro si è evidenziata la sfida giocatasi sul terreno della Riforma del Titolo V della Costituzione, tra le forze esprimenti intenti centralistici e forze propugnatrici di un disegno più autonomista.
Si sono poi, esaminati gli aspetti più controversi del rapporto dell’Irap con la normativa europea. Si è concluso con una riflessione tesa alla comprensione delle tendenze in atto cercando anche di considerare tutte le vicende analizzate come un utile esperimento da valutare in vista della introduzione di nuove e significative forme di tributi, anche regionali.
Energy and momentum of the surface plasmon-polariton supported by a thin metal film
Creators: name: Bekshaev, A. Y.
name: Angelsky, O. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We study the energy and momentum of the surface plasmon-polariton (SPP) excited in a symmetric 3-layer "insulator-metal-insulator" structure, which is known to support the symmetric (S) mode with the negative group velocity as well as the antisymmetric (AS) mode with only positive energy flow. The electric and magnetic field vectors are calculated via both the phenomenological and the microscopic approach; the latter involves the hydrodynamic model accounting for the quantum statistical effects for the electron gas in metal. Explicit representation for the energy and momentum constituents in the dielectric and in the metal film are obtained, and the wavenumber dependences of the energy and momentum contributions for the whole SPP are analyzed numerically. The various energy and momentum constituents are classified with respect to their origin: "field" or "material", and the physical nature: orbital (canonical) and spin (Belinfante) momentum contributions. The pictures characteristic for the S and AS modes are systematically compared. The results can be useful for the studies and applications of the SPP-induced thin-film effects, in particular, for the charge and spin dynamics in thin-film plasmonic systems.
description: 19 pages, 7 figures, plus Supplementary Material 12 pages and 6 figures
Point-to-Point Coulomb Effects in High Brightness Photoelectron Beamlines for Ultrafast Electron Diffraction
Creators: name: Gordon, M.
name: van der Geer, S. B.
name: Maxson, J.
name: Kim, Y. -K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: In an effort to increase spatial and temporal resolution of ultrafast electron diffraction and microscopy, ultra-high brightness photocathodes are actively sought to improve electron beam quality. Beam dynamics codes often approximate the Coulomb interaction with mean-field space charge, which is a good approximation in traditional beams. However, point-to-point Coulomb effects, such as disorder induced heating and the Boersch effect, can not be neglected in cold, dense beams produced by such photocathodes. In this paper, we introduce two new numerical methods to calculate the important effects of the photocathode image charge when using a point-to-point interaction model. Equipped with an accurate model of the image charge, we calculate the effects of point-to-point interactions on two high brightness photoemission beamlines for ultrafast diffraction. The first beamline uses a 200 keV gun, whereas the second uses a 5 MeV gun, each operating in the single-shot diffraction regime with $10^5$ electrons/pulse. Assuming a zero photoemission temperature, it is shown that including stochastic Coulomb effects increases the final emittance of these beamlines by over a factor of 2 and decreases the peak transverse phase space density by over a factor of 3 as compared to mean-field simulations. We then introduce a method to compute the energy released by disorder induced heating using the pair correlation function. This disorder induced heating energy was found to scale very near the theoretical result for stationary ultracold plasmas, and it accounts for over half of the emittance growth above mean-field simulations.
description: 15 pages, 17 figures, submitted to PRAB
Amplification of turbulence in contracting prestellar cores in primordial minihalos
Creators: name: Higashi, Sho
name: Susa, Hajime
name: Chiaki, Gen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the amplification of turbulence through gravitational contraction of the primordial gas in minihalos. We perform numerical simulations to follow the cloud collapse, assuming polytropic equations of state for different initial turbulent Mach numbers and resolutions. We find that the turbulent velocity is amplified solely by gravitational contraction, and eventually becomes comparable to the sound speed, even for small initial turbulent Mach numbers (${\cal M}_0 \gtrsim 0.05$). We derive an analytic formula for the amplification of turbulent velocity in a collapsing cloud, and find that our numerical results are consistent with the formula. These results suggest that the turbulence can play an important role in collapsing clouds for general cases.
description: 17 pages, 16 figures, 2 tables, accepted for publication in ApJ
Classification of one family of 3R positioning Manipulators
Creators: name: Baili, Maher
name: Wenger, Philippe
name: Chablat, Damien
Publisher: name: arXiv
Year: 2007
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The aim of this paper is to classify one family of 3R serial positioning manipulators. This categorization is based on the number of cusp points of quaternary, binary, generic and non-generic manipulators. It was found three subsets of manipulators with 0, 2 or 4 cusp points and one homotopy class for generic quaternary manipulators. This classification allows us to define the design parameters for which the manipulator is cuspidal or not, i.e., for which the manipulator can or cannot change posture without meeting a singularity, respectively.
SN 2005 gj: Evidence for LBV supernovae progenitors?
Creators: name: Trundle, C.
name: Kotak, R.
name: Vink, J. S.
name: Meikle, W. P. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There has been mounting observational evidence in favour of Luminous Blue Variables (LBVs) being the direct progenitors of supernovae. Here we present possibly the most convincing evidence yet for such progenitors. We find multiple absorption component P-Cygni profiles of hydrogen and helium in the spectrum of SN 2005gj, which we interpret as being an imprint of the progenitors mass-loss history. Such profiles have previously only been detected in Luminous Blue Variables. This striking resemblance of the profiles, along with wind velocities and periods consistent with LBV's leads us to connect SN 2005gj to an LBV progenitor.
description: Accepted as a letter to A&A, 4 pages,3 figures
Semisupervised Manifold Alignment of Multimodal Remote Sensing Images
Creators: name: Tuia, Devis
name: Volpi, Michele
name: Trolliet, Maxime
name: Camps-Valls, Gustau
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: We introduce a method for manifold alignment of different modalities (or domains) of remote sensing images. The problem is recurrent when a set of multitemporal, multisource, multisensor and multiangular images is available. In these situations, images should ideally be spatially coregistred, corrected and compensated for differences in the image domains. Such procedures require the interaction of the user, involve tuning of many parameters and heuristics, and are usually applied separately. Changes of sensors and acquisition conditions translate into shifts, twists, warps and foldings of the image distributions (or manifolds). The proposed semisupervised manifold alignment (SS-MA) method aligns the images working directly on their manifolds, and is thus not restricted to images of the same resolutions, either spectral or spatial. SS-MA pulls close together samples of the same class while pushing those of different classes apart. At the same time, it preserves the geometry of each manifold along the transformation. The method builds a linear invertible transformation to a latent space where all images are alike, and reduces to solving a generalized eigenproblem of moderate size. We study the performance of SS-MA in toy examples and in real multiangular, multitemporal, and multisource image classification problems. The method performs well for strong deformations and leads to accurate classification for all domains.
Front propagation in A+B -> 2A reaction under subdiffusion
Creators: name: Froemberg, Daniela
name: Schmidt-Martens, Hauke
name: Sokolov, Igor M.
name: Sagues, Francesc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider an irreversible autocatalytic conversion reaction A+B -> 2A under subdiffusion described by continuous time random walks. The reactants' transformations take place independently on their motion and are described by constant rates. The analog of this reaction in the case of normal diffusion is described by the Fisher-Kolmogorov-Petrovskii-Piskunov (FKPP) equation leading to the existence of a nonzero minimal front propagation velocity which is really attained by the front in its stable motion. We show that for subdiffusion this minimal propagation velocity is zero, which suggests propagation failure.
Study of the Inner Structure of the Molecular Torus in IRAS 08572+3915 NW with Velocity Decomposition of CO Rovibrational Absorption Lines
Creators: name: Onishi, Shusuke
name: Nakagawa, Takao
name: Baba, Shunsuke
name: Matsumoto, Kosei
name: Isobe, Naoki
name: Shirahata, Mai
name: Terada, Hiroshi
name: Usuda, Tomonori
name: Oyabu, Shinki
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Understanding the inner structure of the clumpy molecular torus surrounding the active galactic nucleus is essential in revealing the forming mechanism. However, spatially resolving the torus is difficult because of its size of a few parsecs. Thus, to probe the clump conditions in the torus, we performed the velocity decomposition of the CO rovibrational absorption lines ($Δ{v}=0\to 1,\ Δ{J}=\pm 1$) at $λ\sim 4.67\,\mathrm{μ{m}}$ observed toward an ultraluminous infrared galaxy IRAS 08572+3915 NW with the high-resolution spectroscopy ($R\sim 10{,}000$) of Subaru Telescope. Consequently, we found that each transition had two outflowing components, i.e., (a) and (b), both at approximately $\sim -160\,\mathrm{km\,s^{-1}}$, but with broad and narrow widths, and an inflowing component, i.e., (c), at approximately $\sim +100\,\mathrm{km\,s^{-1}}$, which were attributed to the torus. The ratios of the velocity dispersions of each component lead to those of the rotating radii around the black hole of $R_\mathrm{rot,a}:R_\mathrm{rot,b}:R_\mathrm{rot,c}\approx 1:5:17$, indicating the torus where clumps are outflowing in the inner regions and inflowing in the outer regions if a hydrostatic disk with $σ_V\propto R_\mathrm{rot}^{-0.5}$ is assumed. Based on the kinetic temperature of components (a) and (b) of $\sim 720\,\mathrm{K}$ and $\sim 25\,\mathrm{K}$ estimated from the level population, the temperature gradient is $T_\mathrm{kin}\propto R_\mathrm{rot}^{-2.1}$. Magnetohydrodynamic models with large density fluctuations of two orders of magnitude or more are necessary to reproduce this gradient.
description: Accepted for publication in ApJ, 27 pages, 13 figures, 6 tables, Minor changes after proof (v3)
Exploring compressed supersymmetry with same-sign top quarks at the Large Hadron Collider
Creators: name: Martin, Stephen P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In compressed supersymmetry, a light top squark naturally mediates efficient neutralino pair annihilation to govern the thermal relic abundance of dark matter. I study the LHC signal of same-sign leptonic top-quark decays from gluino and squark production, which follows from gluino decays to top plus stop followed by the stop decaying to a charm quark and the LSP in these models. Measurements of the numbers of jets with heavy-flavor tags in the same-sign lepton events can be used to confirm the origin of the signal. Summed transverse momentum observables provide an estimate of an effective superpartner mass, which is correlated with the gluino mass. Measurements of invariant mass endpoints from the visible products of gluino decays do not allow direct determination of superpartner masses, but can place constraints on them, including lower bounds on the gluino mass as a function of the top-squark mass.
description: 22 pages. v2: Discussion of competition between 2-body and 4-body stop decays corrected. References added
Program planning in the Ethiopian extension service : its evolution and structure
Creators: name: Mandefrot, Kefyalew
Publisher: name: University of British Columbia
Year: 2010

description: This study examined the program planning mechanism and structure in Ethiopian agricultural extension. Agricultural extension was seen by most policy makers and funding agencies as one of the alternatives to rural development. Extension was defined as an out-of-school educational process of working with rural people utilizing particular teaching techniques and certain supporting services with a distinctive spirit of cooperation and mutual respect. The goal was to enable people to acquire and use skills, knowledge and information to improve their lives. In order to achieve the objective of the study, the history of agricultural extension in Ethiopia from 1952 to 1980 was reviewed and the origin, trends and problems in extension program planning in Ethiopia were discussed. Following the historical analysis, a review of program planning models relevant to agricultural extension was provided. The study, after presenting an examination of the program planning mechanism in Ethiopia, conducted a critical analysis of major problems. The major problems identified are related to the basic program planning mechanism, coordination and training. An alternative mechanism was identified based on Sork's basic planning model. A summary was given. Major conclusions of the study were discussed in terms of program planning, particularly with respect to analysis of the planning context and client system, administrative planning, coordination and training programs required for effective extension education. The study revealed several important weaknesses in the extension program planning mechanism used in Ethiopia. It was suggested that if these weaknesses are eliminated, Ethiopian agricultural production — and the quality of life of those dependent on the agricultural sector — could be improved. Increasing collaboration between agencies, joint planning of programs, altering the programming sequence, and better timing of educational activities were suggested as means of improving agricultural extension services in Ethiopia.