cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Identification of additional young nearby runaway stars based on Gaia data release 2 observations and the lithium test
Creators: name: Bischoff, R.
name: Mugrauer, M.
name: Torres, G.
name: Geymeier, M.
name: Neuhäuser, R.
name: Stenglein, W.
name: Michel, K. -U.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Runaway stars are characterised by their remarkably high space velocities, and the study of their formation mechanisms has attracted considerable interest. Young, nearby runaway stars are the most favorable for identifying their place of origin, and for searching for possible associated objects such as neutron stars. Usually the research field of runaway stars focuses on O- and B-type stars, because these objects are better detectable at larger distances than late-type stars. Early-type runaway stars have the advantage, that they evolve faster and can therefore better be confirmed to be young. In contrast to this, the catalogue of young runaway stars within 3 kpc by Tetzlaff, Neuhäuser, & Hohle (2011) contains also stars of spectral type A and later. The objects in this catalogue were originally classified as young ($\le 50$ Myr) runaway stars by using Hipparcos data to estimate the ages from their location in the Hertzsprung-Russell diagram and evolutionary models. In this article, we redetermine and/or constrain their ages not only by using the more precise second data release of the Gaia mission, but also by measuring the equivalent width of the lithium (6708 $\unicode{xC5}$) line, which is a youth indicator. Therefore, we searched for lithium absorption in the spectra of 51 target stars, taken at the University Observatory Jena between March and September 2020 with the Échelle spectrograph FLECHAS, and within additional TRES-spectra from the Fred L. Whipple Observatory. The main part of this campaign with its 308 reduced spectra, accessible at VizieR, was already published. In this work, which is the continuation and completion of the in 2015 initiated observing campaign, we found three additional young runaway star candidates.
description: 16 pages, 9 figures, 7 tables, accepted for publication in AN. arXiv admin note: text overlap with arXiv:2009.02123
Y-system and Quasi-Classical Strings
Creators: name: Gromov, Nikolay
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently Kazakov, Vieira and the author conjectured the Y-system set of equations describing the planar spectrum of AdS/CFT. In this paper we solve the Y-system equations in the strong coupling scaling limit. We show that the quasi-classical spectrum of string moving inside AdS3 x S1 matches precisely with the prediction of the Y-system. Thus the Y-system, unlike the asymptotic Bethe ansatz, describes correctly the spectrum of one-loop string energies including all exponential finite size corrections. This gives a very non-trivial further support in favor of the conjecture.
description: references added, published version
Balanced Masked and Standard Face Recognition
Creators: name: Qi, Delong
name: Hu, Kangli
name: Tan, Weijun
name: Yao, Qi
name: Liu, Jingfeng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We present the improved network architecture, data augmentation, and training strategies for the Webface track and Insightface/Glint360K track of the masked face recognition challenge of ICCV2021. One of the key goals is to have a balanced performance of masked and standard face recognition. In order to prevent the overfitting for the masked face recognition, we control the total number of masked faces by not more than 10\% of the total face recognition in the training dataset. We propose a few key changes to the face recognition network including a new stem unit, drop block, face detection and alignment using YOLO5Face, feature concatenation, a cycle cosine learning rate, etc. With this strategy, we achieve good and balanced performance for both masked and standard face recognition.
On Beta-Product Convolutions
Creators: name: Hashorva, Enkelejd
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 60F05, 60G70

description: Let R be a positive random variable independent of S which is beta distributed. In this paper we are interested on the relation between the distribution function of R and that of RS. For this model we derive first some distributional properties, and then investigate the lower tail asymptotics of RS when R is regularly varying at 0, and vice-versa. Our first application concerns the asymptotic behaviour of the componentwise sample minima related to an elliptical distributions. Further, we derive the lower tails asymptotic of the aggregated risk for bivariate polar distributions.
description: 12 pages
Panzeria meridionalis SHIMA 2020
Creators: name: Zeegers, Theo
name: Kim, Wonwoong
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tachinidae
Panzeria
Panzeria meridionalis

description: Panzeria meridionalis SHIMA, 2020
M a t e r i a l e x a m i n e d: 1♁, Bupyeong-ri, Gangcheon-myeon, Yeoju-si, Gyeonggi-do, 37°15'23"N 127°45'19"E, 23.v.2021.
D i s t r i b u t i o n: Eastern Palaearctic: Japan, South Korea *.
R e m a r k: Very recently described and illustrated by SHIMA (2020). So far, only known from a few localities in Japan on the southern island Kyushu, just across the Korea strait.
description: Published as part of Zeegers, Theo & Kim, Wonwoong, 2023, Contribution to the knowledge of Tachinidae (Diptera) of Korea, pp. 669-678 in Linzer biologische Beiträge 54 (2) on page 672, DOI: 10.35011/lbb.54.2-47, http://zenodo.org/record/10414609
Understanding Recent Developments in the Turkish Labor Market: Empirical Essays with a Gender Focus
Creators: name: Ayhan, Hatice Sinem <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: SECS-P/06 Economia applicata

description: This dissertation comprises three essays on the Turkish labor market. The first essay characterizes the distinctive characteristics of the Turkish labor market with the aim of understanding the factors lying behind its long-standing poor performance relative to its European counterparts. The analysis is based on a cross-country comparison among selected European Union countries. 

Among all the indicators of labor market flexibility, non-wage cost rigidities are regarded as one of the most important factors in slowing down employment creation in Turkey. The second essay focuses on an employment subsidy policy which introduces a reduction in non-wage costs through social security premium incentives granted to women and young men. Exploiting a difference-in-difference-in differences strategy, I evaluate the effectiveness of this policy in creating employment for the target group. The results, net of the recent crisis effect, suggest that the policy accounts for a 1.4% to 1.6% increase in the probability of being hired for women aged 30 to 34 above men of the same age group in the periods shortly after the announcement of the policy. 

In the third essay of the dissertation, I analyze the labor supply response of married women to their husbands' job losses (AWE). I empirically test the hypothesis of added worker effect for the global economic crisis of 2008 by relying on the Turkey context. Identification is achieved by exploiting the exogenous variation in the output of male-dominated sectors hard-hit by the crisis and the gender-segmentation that characterizes the Turkish labor market. Findings based on the instrumental variable approach suggest that the added worker effect explains up to 64% of the observed increase in female labor force participation in Turkey. The size of the effect depends on how long it takes for wives to adjust their labor supply to their husbands' job losses.
Elektronisk Journal
Creators: Styrelsen for Statens Uddannelsesstøtte
Styrelse for Videregående Uddannelser og Uddannelsesstøtte
Publisher: name: Rigsarkivet
Year: 2022

description: Journalsystemets formål er at understøtte opgaveløsningen i Styrelsen ved en enkel og gennemskuelig organisering af alt skriftligt materiale.
Archipelagian Cosmology: Dynamics and Observables in a Universe with Discretized Matter Content
Creators: name: Clifton, Timothy
name: Ferreira, Pedro G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a model of the Universe in which the matter content is in the form of discrete islands, rather than a continuous fluid. In the appropriate limits the resulting large-scale dynamics approach those of a Friedmann-Robertson-Walker (FRW) universe. The optical properties of such a space-time, however, do not. This illustrates the fact that the optical and `average' dynamical properties of a relativistic universe are not equivalent, and do not specify each other uniquely. We find the angular diameter distance, luminosity distance and redshifts that would be measured by observers in these space-times, using both analytic approximations and numerical simulations. While different from their counterparts in FRW, the effects found do not look like promising candidates to explain the observations usually attributed to the existence of Dark Energy. This incongruity with standard FRW cosmology is not due to the existence of any unexpectedly large structures or voids in the Universe, but only to the fact that the matter content of the Universe is not a continuous fluid.
description: 49 pages, 15 figures. Corrections made to description of lattice construction
Un successeur de Bouguer : Étienne Bézout (1730 -- 1783) commissaire pour la marine à l'Académie royale des sciences
Creators: name: Alfonsi, Liliane
Publisher: name: arXiv
Year: 2009
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics
subject: 01A50, 12D05, 1403, 15A15

description: Étienne Bézout, member of the Académie Royale des Sciences, have to study some works and books sended at the Académy. In this article, we will look at this responsibility for Navy, before and after 1764, which is the year of Bézout's nomination at the charge of Examinateur des Gardes du Pavillon et de la Marine. Each year he must go to Brest, Rochefort and Toulon harbours to examine the Gardes de la Marine. This give to him titles and qualifications as expert in sailing. We will see his participation at an Academy polemic : Blondeau versus Bouguer/Lacaille on a navigation book. Almost in the same time, Étienne Bézout will be member of the Académie de Marine de Brest in 1769. We will see his work in this last Academy. At last, we will study his Traité de navigation, written in 1769 and we will compare to Bouguer's Navigation book.
description: 21 pages
Miljøtilsyn - Miljøstyrelsens indberetningssystem 2007-2010 til indberetning for kommunerne og amterne
Creators: Miljøministeriet
Publisher: name: Rigsarkivet
Year: 2022

description: Miljøtilsynet afvikler en årlig indberetning, hvor kommuner og amter indberetter en række informationer.
Denne indberetning foregår på nuværende tidspunkt via skriftlige skemaer, der sendes af Miljøtilsynet, og efter udfyldelse returneres af kommuner og amter.

Denne indberetning ønskes afviklet elektronisk via Internettet, bl.a. for at mindske ressourceforbruget og antallet af fejl under indberetningerne. En række valideringer ønskes implementeret i Web-siderne, der i så stort omfang som muligt skal hindre indtastnings fejl, og gøre brugerne opmærksomme på større afvigelser i indberetninger og totaler.
A note on moments of derivatives of characteristic polynomials
Creators: name: Dehaye, Paul-Olivier
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: Mathematical Physics (math-ph)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 11M26, 60B15, 15A52, 05E10

description: We present a simple technique to compute moments of derivatives of unitary characteristic polynomials. The first part of the technique relies on an idea of Bump and Gamburd: it uses orthonormality of Schur functions over unitary groups to compute matrix averages of characteristic polynomials. In order to consider derivatives of those polynomials, we here need the added strength of the Generalized Binomial Theorem of Okounkov and Olshanski. This result is very natural as it provides coefficients for the Taylor expansions of Schur functions, in terms of shifted Schur functions. The answer is finally given as a sum over partitions of functions of the contents. One can also obtain alternative expressions involving hypergeometric functions of matrix arguments.
description: 12 pages
title: Development of population models for risk assessment in New Zealand
Creators: name: Scheele, Finn R.
name: Benson, Adrian
name: Horspool, Nick A.
Publisher: name: GNS Science
Year: 2021

description: Population models are key components for natural hazard risk modelling of human impacts, such as evacuation, casualty estimation or household relocation. Existing models designed for this purpose in New Zealand lack the required details for accurate risk modelling. We propose the development of three population models. The first is a model of households containing demographics of interest. The second is a network model describing the movement of individuals from source (usual residence) to other locations (such as work or school). The third is a spatial and temporal population distribution model for locating individuals, such as within office buildings, commuting, or in parks. The development of a pilot household population model for the Wellington region is described. Census data tables were used to create a synthetic population of households, including the attributes of tenure, composition, income and household size. Households were distributed to residential building footprints. The proposed development of a spatial and temporal distribution model is also described, using a variety of data sources such as OpenStreetMap and occupancy rates. The proposed network model has not been explored in detail in this report. The pilot household population model produced reasonable results when compared with the census data tables. The model is likely to be sufficiently accurate for many forms of risk modelling, depending on the variables and analysis required. Future improvements to the model may be made by utilising census microdata rather than aggregated census data tables (auth)
Opción National Survey: Uruguay January 2013
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: 2014 general election; vote for or against parties; Colorado Party; National Party; Frente Amplio (a leftist political coalition); Independent Party. National Agency for Research and Innovation (ANII) Collection.
Opción Consultores National Survey: Uruguay November 2015
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Restriction of alcohol consumption; legalization of marijuana; education; role and influence of unions in policy; are unions acting in the interest of workers, 2014 general election; vote for or against candidates; Tabaré Vázquez (Frente Amplio); Luis Lacalle Pou (National Party); Pedro Bordaberry (Colorado Party); Pablo Mieres (Independent Party). National Agency for Research and Innovation (ANII) Collection.
TeV Scale Inverse Seesaw in SO(10) and Leptonic Non-Unitarity Effects
Creators: name: Dev, P. S. Bhupal
name: Mohapatra, R. N.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that a TeV scale inverse seesaw model for neutrino masses can be realized within the framework of a supersymmetric SO(10) model consistent with gauge coupling unification and observed neutrino masses and mixing. We present our expectations for non-unitarity effects in the leptonic mixing matrix some of which are observable at future neutrino factories as well as the next generation searches for lepton flavor violating processes such as μ--> e + γ. The model has TeV scale W_R and Z' bosons which are accessible at the Large Hadron Collider.
description: 35 pages, 3 figures; version accepted for publication in Phys. Rev. D
The resolution property of algebraic surfaces
Creators: name: Gross, Philipp
Publisher: name: arXiv
Year: 2010
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F05, 14J60, 14C20

description: We prove that on separated algebraic surfaces every coherent sheaf is a quotient of a locally free sheaf. This class contains many schemes that are neither normal, reduced, quasiprojective or embeddable into toric varieties. Our methods extend to arbitrary $2$-dimensional schemes that are proper over a noetherian ring.
description: 19 pages
On modular forms for some noncongruence subgroups of SL_2(Z) II
Creators: name: Long, Ling
name: Kurth, Chris
Publisher: name: arXiv
Year: 2008
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F11, 11F30

description: In this paper we show two classes of noncongruence subgroups satisfy the so-called unbounded denominator property. In particular, we establish our conjecture in [KL08] which says that every type II noncongruence character group of Gamma^0(11) satisfies the unbounded denominator property.
Detection of charge motion in a non-metallic silicon isolated double quantum dot
Creators: name: Ferrus, T.
name: Rossi, A.
name: Tanner, M.
name: Podd, G.
name: Chapman, P.
name: Williams, D. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: As semiconductor device dimensions are reduced to the nanometer scale, effects of high defect density surfaces on the transport properties become important to the extent that the metallic character that prevails in large and highly doped structures is lost and the use of quantum dots for charge sensing becomes complex. Here we have investigated the mechanism behind the detection of electron motion inside an electrically isolated double quantum dot that is capacitively coupled to a single electron transistor, both fabricated from highly phosphorous doped silicon wafers. Despite, the absence of a direct charge transfer between the detector and the double dot structure, an efficient detection is obtained. In particular, unusually large Coulomb peak shifts in gate voltage are observed. Results are explained in terms of charge rearrangement and the presence of inelastic cotunneling via states at the periphery of the single electron transistor dot.
Opción National Survey: Uruguay March 2013
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: 2014 general election; vote for or against parties; Frente Amplio (a leftist political coalition); National Party; Colorado Party; Independent Party; 2009 general election; past voting behavior. National Agency for Research and Innovation (ANII) Collection.
On the energy conservation by weak solutions of the relativistic Vlasov-Maxwell system
Creators: name: Sospedra-Alfonso, Reinel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q02

description: We show that weak solutions of the relativistic Vlasov-Maxwell system preserve the total energy provided that the electromagnetic field is locally of bounded variation and, for any $λ$> 0, the one-particle distribution function has a square integrable $λ$-moment in the momentum variable.
description: article, 7 pages
Opción Consultores National Survey: Uruguay January 2016
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: Personal financial situation; President Tabaré Vázquez job approval; the economy; crime; education; 2014 general election; vote for or against candidates; Tabaré Vázquez (Frente Amplio); Luis Lacalle Pou (National Party); Pedro Bordaberry (Colorado Party); Pablo Mieres (Independent Party). National Agency for Research and Innovation (ANII) Collection.
Schineria majae ZIMIN 1947
Creators: name: Zeegers, Theo
name: Kim, Wonwoong
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tachinidae
Schineria
Schineria majae

description: Schineria majae ZIMIN, 1947(Fig. 1C)
M a t e r i a l e x a m i n e d: 1♀, 800, Bonghwa-ro, Anheung-myeon, Hoengseong-gun, Gangwon-do, 37°27'27"N 128°08'42"E, 29.ix.2018; 1♀ same locality, 30.vi.2019, 1♀ same locality, 2.vii.2019.
D i s t r i b u t i o n: Eastern Palaearctic: China, Russia (Far East), South Korea *.
description: Published as part of Zeegers, Theo & Kim, Wonwoong, 2023, Contribution to the knowledge of Tachinidae (Diptera) of Korea, pp. 669-678 in Linzer biologische Beiträge 54 (2) on page 672, DOI: 10.35011/lbb.54.2-47, http://zenodo.org/record/10414609
Rag2-/-;gammac-/- immunodeficient mice, a new preclinical model to study antitumor approaches
Creators: name: Antognoli, Agnese <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: MED/04 Patologia generale

description: Animal models have been relevant to study the molecular mechanisms of cancer and to develop new antitumor agents. Anyway, the huge divergence in mouse and human evolution made difficult the translation of the gained achievements in preclinical mouse based studies. The generation of clinically relevant murine models requires their humanization both concerning the creation of transgenic models and the generation of humanized mice in which to engraft a functional human immune system, and reproduce the physiological effects and molecular mechanisms of growth and metastasization of human tumors. In particular, the availability of genotypically stable immunodepressed mice able to accept tumor injection and allow human tumor growth and metastasization would be important to develop anti-tumor and anti-metastatic strategies. Recently, Rag2-/-;gammac-/- mice, double knockout for genes involved in lymphocyte differentiation, had been developed (CIEA, Central Institute for Experimental Animals, Kawasaki, Japan). Studies of human sarcoma metastasization in Rag2-/-; gammac-/- mice (lacking B, T and NK functionality) revealed their high metastatic efficiency and allowed the expression of human metastatic phenotypes not detectable in the conventionally used nude murine model. In vitro analysis to investigate the molecular mechanisms involved in the specific pattern of human sarcomas metastasization revealed the importance of liver-produced growth and motility factors, in particular the insulin-like growth factors (IGFs). The involvement of this growth factor was then demonstrated in vivo through inhibition of IGF signalling pathway. Due to the high growth and metastatic propensity of tumor cells, Rag2-/-;gammac-/- mice were used as model to investigate the metastatic behavior of rhabdomyosarcoma cells engineered to improve the differentiation.
It has been recently shown that this immunodeficient model can be reconstituted with a human immune system through the injection of human cord blood progenitor cells. The work illustrated in this thesis revealed that the injection of different human progenitor cells (CD34+ or CD133+) showed peculiar engraftment and differentiation abilities. Experiments of cell vaccination were performed to investigate the functionality of the engrafted human immune system and the induction of specific human immune responses. Results from such experiments will allow to collect informations about human immune responses activated during cell vaccination and to define the best reconstitution and experimental conditions to create a humanized model in which to study, in a preclinical setting, immunological antitumor strategies.
Il sindacato della Corte di cassazione sul travisamento della prova
Creators: name: Campilongo, Valentina <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2010
Subjects: IUS/16 Diritto processuale penale

description: Sect. 606, par. 1, e), as modified by Law 46, enacted on Februray 20th, 2006 introduced the chance to appeal to the Court of cassation in case of inconsistent reasoning and extended control on its existence and on other flaws and lack of obvious logic over the text of the contested decision, namely “to other acts the process specified in the grounds of burden”. The renewed provision seems to properly reappoint the “distortion of the evidence”, i.e. the omitted or distorted evidence that could be relevant and conclusive one, in the peculiar context of the grounds' vice. After a general review of the obligation to state reasons for judicial decisions, we analyze the innovative status of the vice of “distortion of evidence” and the conditions and the limits - defined by the law -  within we can contest a resolution for illegitimacy. Then, we outline the systematic spin-off brought by the new form of sect. 606, par. 1, e) on some institutions in the code of criminal procedure. Finally, we make the role of the Court of cassation clear in the  modern criminal trial, since the 2006 reform gave no definite answer on this fundamental aspect of the question.
Therobia mongolica
Creators: name: Zeegers, Theo
name: Kim, Wonwoong
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Tachinidae
Therobia
Therobia mongolica

description: Therobia mongolica (RICHTER, 1972)(Fig. 1F)
M a t e r i a l e x a m i n e d: 1♀, 944, Haedong-ri, Yaksan-myeon, Wando-gun, Jeollanam-do, 34°22'23"N 126°54'33"E, 19.vi.2021, on light trap.
D i s t r i b u t i o n: Eastern Palaearctic: Mongolia, Russia (Far East), South Korea *.
R e m a r k: We have not seen other material of this species, but our female is a good match with the original description by RICHTER (1972).
description: Published as part of Zeegers, Theo & Kim, Wonwoong, 2023, Contribution to the knowledge of Tachinidae (Diptera) of Korea, pp. 669-678 in Linzer biologische Beiträge 54 (2) on page 672, DOI: 10.35011/lbb.54.2-47, http://zenodo.org/record/10414609
Lesion detection and classification in breast cancer:
evaluation of approaches based on morphological features,
tracer kinetic modelling and semi-quantitative parameters in
MR functional imaging (DCE-MRI)
Creators: name: Fusco, Roberta <1985>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: ING-INF/06 Bioingegneria elettronica e informatica

description: The diagnosis, grading and classification of tumours has benefited considerably from the development of DCE-MRI which is now essential to the adequate clinical management of many tumour types due to its capability in detecting active angiogenesis. 
Several strategies have been proposed for DCE-MRI evaluation. Visual inspection of contrast agent concentration curves vs time is a very simple yet operator dependent procedure, therefore more objective approaches have been developed in order to facilitate comparison between studies. In so called model free approaches, descriptive or heuristic information extracted from time series raw data have been used for tissue classification. The main issue concerning these schemes is that they have not a direct interpretation in terms of physiological properties of the tissues.
On the other hand, model based investigations typically involve compartmental tracer kinetic modelling and pixel-by-pixel estimation of kinetic parameters via non-linear regression applied on region of interests opportunely selected by the physician. This approach has the advantage to provide parameters directly related to the pathophysiological properties of the tissue such as vessel permeability, local regional blood flow, extraction fraction, concentration gradient between plasma and extravascular-extracellular space. Anyway, nonlinear modelling is computational demanding and the accuracy of the estimates can be affected by the signal-to-noise ratio and by the initial solutions.
The principal aim of this thesis is investigate the use of semi-quantitative and quantitative parameters for segmentation and classification of breast lesion. The objectives can be subdivided as follow: describe the principal techniques to evaluate time intensity curve in DCE-MRI with focus on kinetic model proposed in literature; to evaluate the influence in parametrization choice for a classic bi-compartmental kinetic models; to evaluate the performance of a method for simultaneous tracer kinetic modelling and pixel classification; to evaluate performance of machine learning techniques training for segmentation and classification of breast lesion.
Phases of recovery from open heart surgery : a descriptive study of postoperative patterns in adult cardiac surgery patients prior to discharge from hospital
Creators: name: Jillings, Carol Rossman
Publisher: name: University of British Columbia
Year: 2010

description: This descriptive study was designed to investigate the problem of inadequate emotional recovery from open heart surgery. This problem has been defined by a number of earlier researchers who have noted adverse emotional reactions to the experience of cardiac surgery in both the early postoperative and the post-discharge periods. This investigation had as its purpose the examination of the pre-discharge recovery of patients, and the investigator intended to note whether there existed a common pattern of recovery among the patients studied (hence, a pattern of emotional response to surgery). It was anticipated that the discovery of similarities of behaviour might give insight into the responses to open heart surgery and provide information important to the study of long-term rehabilitation. Twenty adult patients scheduled for open heart surgery were selected as the sample for study. The principal setting for the investigation was the Cardiac Surgery Unit of a large metropolitan hospital. Subjects were interviewed one to two days prior to surgery and then every two to three days postoperatively until the time of discharge. The investigator obtained qualitative data with the aid of a data collection tool, noting the physiological status of the subjects but focusing most directly on verbal and nonverbal behaviours exhibited. The latter observations included focus of conversation, patterns of communication, affect, orientation, level of anxiety, and activity. Following analysis of the data, it was noted that a common pattern of recovery was indeed evident. Three phases of recovery - Somatic, Transition and Resolution - could be described for each subject in the sample. The phases indicated the subjects' general responses to surgery and their progression toward increased activity and independence at the time of discharge. In effect, the phases served to define the hospital course of emotional recovery from open heart surgery. The length and onset of these three phases were similar for patients with an uncomplicated recovery but varied with patients who experienced major physiologic difficulties. The implications of a recovery pattern have been discussed relative to nursing care of the cardiac surgical patient and specific recommendations for nursing intervention have been made. Subject areas worthy of further investigation have been enumerated by the investigator in light of the conclusions of the present study.
Ribosome Biogenesis and cell cycle regulation: Effect of RNA Polymerase III inhibition
Creators: name: Onofrillo, Carmine <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2013
Subjects: MED/05 Patologia clinica

description: In cycling cells positive stimuli like nutrient, growth factors and mitogens increase ribosome biogenesis rate and protein synthesis to ensure both growth and proliferation. In contrast, under stress situation, proliferating cells negatively modulate ribosome production to reduce protein synthesis and block cell cycle progression. The main strategy used by cycling cell to coordinate cell proliferation and ribosome biogenesis is to share regulatory elements, which participate directly in ribosome production and in cell cycle regulation. In fact, there is evidence that stimulation or inhibition of cell proliferation exerts direct effect on activity of the RNA polymerases controlling the ribosome biogenesis, while several alterations in normal ribosome biogenesis cause changes of the expression and the activity of the tumor suppressor p53, the main effector of cell cycle progression inhibition. The available data on the cross-talk between ribosome biogenesis and cell proliferation have been until now obtained in experimental model in which changes in ribosome biogenesis were obtained either by reducing the activity of the RNA polymerase I or by down-regulating the expression of the ribosomal proteins. The molecular pathways involved in the relationship between the effect of the inhibition of RNA polymerase III (Pol III) activity and cell cycle progression have been not yet investigated. In eukaryotes, RNA Polymerase III is responsible for transcription of factors involved both in ribosome assembly (5S rRNA) and rRNA processing (RNAse P and MRP).Thus, the aim of this study is characterize the effects of the down-regulation of RNA Polymerase III activity, or the specific depletion of 5S rRNA. The results that will be obtained might lead to a deeper understanding of the molecular pathway that controls the coordination between ribosome biogenesis and cell cycle, and might give useful information about the possibility to target RNA Polymerase III for cancer treatment.
Superflares from magnetars revealing the GRB central engine
Creators: name: Giannios, Dimitrios
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Long-duration gamma-ray bursts (GRBs) may be powered by the rotational energy of a millisecond magnetar. I argue that the GRB-driving magnetars lie at the high end of the distribution of magnetic field strengths of magnetars. The field of GRB magnetars decays on timescale of hundreds of years and can power SGR-like flares up to ~100 times more powerful than the 2004 event of SGR 1806--20. A few of these flares per year may have been observed by {\it BATSE} and classified as short-duration GRBs. Association of one of these superflares with a nearby d_L\simless 250 Mpc galaxy and the discovery of a, coincident in space, 100-year-old GRB afterglow (observed in the radio) will be the characteristic signature of the magnetar model for GRBs.
description: 4 pages, MNRAS, 403, L51
Brushes of flexible, semiflexible and rodlike diblock polyampholytes: Molecular dynamics simulation and scaling analysis
Creators: name: Baratlo, M.
name: Fazli, H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Planar brushes of flexible, semiflexible and rodlike diblock polyampholytes are studied using molecular dynamics simulations and scaling analysis in a wide range of the grafting density. Simulations show linear dependence of the average thickness on the grafting density for all the brushes regardless of their different equilibrium conformations and different flexibility of anchored chains. Slopes of fitted lines to the average thickness of the brushes of semiflexible and rodlike polyampholytes versus the grafting density are approximately the same and differ considerably from that of the brush of flexible chains. The average thickness of the brush of diblock polyampholytes is also obtained as a function of the grafting density using a simple scaling analysis which is in good agreement with the results of our simulations.
description: 5 Figures
A spectral method for elliptic equations: the Dirichlet problem
Creators: name: Atkinson, Kendall
name: Chien, David
name: Hansen, Olaf
Publisher: name: arXiv
Year: 2008
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N35

description: An elliptic partial differential equation Lu=f with a zero Dirichlet boundary condition is converted to an equivalent elliptic equation on the unit ball. A spectral Galerkin method is applied to the reformulated problem, using multivariate polynomials as the approximants. For a smooth boundary and smooth problem parameter functions, the method is proven to converge faster than any power of 1/n with n the degree of the approximate Galerkin solution. Examples in two and three variables are given as numerical illustrations. Empirically, the condition number of the associated linear system increases like O(N), with N the order of the linear system.
description: This is latex with the standard article style, produced using Scientific Workplace in a portable format. The paper is 22 pages in length with 8 figures
Double Affine Hecke Algebras of Rank 1 and the $Z_3$-Symmetric Askey-Wilson Relations
Creators: name: Ito, Tatsuro
name: Terwilliger, Paul
Publisher: name: arXiv
Year: 2010
Subjects: subject: Rings and Algebras (math.RA)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 33D80, 33D45

description: We consider the double affine Hecke algebra $H=H(k_0,k_1,k^\vee_0,k^\vee_1;q)$ associated with the root system $(C^\vee_1,C_1)$. We display three elements $x$, $y$, $z$ in $H$ that satisfy essentially the $Z_3$-symmetric Askey-Wilson relations. We obtain the relations as follows. We work with an algebra $\hat H$ that is more general than $H$, called the universal double affine Hecke algebra of type $(C_1^\vee,C_1)$. An advantage of $\hat H$ over $H$ is that it is parameter free and has a larger automorphism group. We give a surjective algebra homomorphism ${\hat H} \to H$. We define some elements $x$, $y$, $z$ in $\hat H$ that get mapped to their counterparts in $H$ by this homomorphism. We give an action of Artin's braid group $B_3$ on $\hat H$ that acts nicely on the elements $x$, $y$, $z$; one generator sends $x\mapsto y\mapsto z \mapsto x$ and another generator interchanges $x$, $y$. Using the $B_3$ action we show that the elements $x$, $y$, $z$ in $\hat H$ satisfy three equations that resemble the $Z_3$-symmetric Askey-Wilson relations. Applying the homomorphism ${\hat H}\to H$ we find that the elements $x$, $y$, $z$ in $H$ satisfy similar relations.
Opción National Survey: Uruguay April 2013
Creators: name: Opción Consultores, In Bogliaccini, Juan, And Queirolo Rosario Laboratorio De Opinión Pública And Redes Sociales En Uruguay Collection (Social Networks And Public Opinion Lab Collection)
Publisher: name: Roper Center for Public Opinion Research
Year: 2021

description: 2014 general election; vote for or against parties; Colorado Party; National Party; Frente Amplio (a leftist political coalition); Independent Party; vote for or against candidates; Pedro Bordaberry (Colorado Party); Jorge Larrañaga (National Party); Tabaré Vázquez (Frente Amplio); Pablo Mieres (Independent Party); 2009 general election. National Agency for Research and Innovation (ANII) Collection.
Ottimizzazione di un protocollo di anticoagulazione regionale con citrato in CRRT
Optimization of a regional citrate anticoagulation protocol in CRRT
Creators: name: Ambrosino, Mariacarmela <1978>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: MED/14 Nefrologia

description: Ottimizzazione di un protocollo di anticoagulazione regionale con citrato in CRRT

Introduzione: La necessità di un'anticoagulazione continua e l'ipofosforemia in corso di trattamento sono problemi costranti in corso di CRRT. Il nostro studio ha cercato di dimostrare l'efficacia e la sicurezza dell'anticoagulazione regionale con citrato in CVVH basato sull'utilizzo di una soluzione di citrato (18 mmol/L) associata ad una soluzione di reinfusione contenente fosfato, recentemente disponibile in commercio, al fine di ridurre l'ipofosfatemia in corso di CRRT. 
Metodi: Abbiamo utilizzato il nostro protocollo basato sull'utilizzo di una concentrazione di citrato contenente 18 mmol/l associata ad una soluzione di reinfusione contenente fosfato in un piccolo gruppo di pazienti ricoverati in terapia intensiva post-cardiochirurgica, sottoposti a CRRT per insufficienza renale acuta.
Risultati: Il nostro protocollo ha garantito un'adeguata durata del circuito ed un ottimo controllo dell'equilibrio acido-base in ogni paziente. E' stata necessaria solo una minima supplementazione di fosforo in alcuni dei pazienti trattati.
Conclusioni: Il nostro protocollo basato sull' utilizzo di una soluzione a concentrazione di citrato maggiore (18 mmol/l), permette un miglior controllo dell'equilibrio acido-base rispetto all'utilizzo della soluzione a più bassa concentrazione di citrato. L'uso di una minore dose di citrato ed il mantenimento di un target maggiore di calcio ionizzato all'interno del circuito sono comunque associati ad un'adeguata durata del circuito.
I livelli di fosforemia sono rimasti sostanzialmente stabili nella maggior parte dei pazienti trattati, grazie alla presenza di fosfato nella soluzione utilizzata come reinfusione in post-diluizione.
description: Optimization of a regional citrate anticoagulation protocol in CRRT

Purpose: Prolonged anticoagulation and hypophosphatemia are well known drawbacks of CRRT. The aim of our study was to show the efficacy and safety of a regional citrate anticoagulation protocol for CVVH combined with a phosphate containing replacement fluid.
Methods: We used our  protocol, based on a citrate solution (18 mmol/l) combined with in a  phosphate containing replacement fluid, in a small cohort of heart surgery patients. 
Results: Our protocol provided an adequate circuit lifetime and an excellent acid-base status in every patient. A low amount of phosphorus supplememntation was required only in a very few patients.
Conclusions: Our protocol based on a citrate solution (18 mmol/l) combined with a phosphate containing replacement fluid, allows a better buffer balance control than using of a lower citrate solution. Moreover, an adequate circuit lifetime was obtained.  Serum phosphate was steadily maintained in all patients. Only in a very few patients a low  supplementation was required.
Contrasting Behavior of Carbon Nucleation in the Initial Stages of Graphene Epitaxial Growth on Stepped Metal Surfaces
Creators: name: Chen, Hua
name: Zhu, Wenguang
name: Zhang, Zhenyu
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using first-principles calculations within density functional theory, we study the energetics and kinetics of carbon nucleation in the early stages of epitaxial graphene growth on three representative stepped metal surfaces: Ir(111), Ru(0001), and Cu(111). We find that on the flat surfaces of Ir(111) and Ru(0001), two carbon atoms repel each other, while they prefer to form a dimer on Cu(111). Moreover, the step edges on Ir and Ru surfaces cannot serve as effective trapping centers for single carbon adatoms, but can readily facilitate the formation of carbon dimers. These contrasting behaviors are attributed to the delicate competition between C-C bonding and C-metal bonding, and a simple generic principle is proposed to predict the nucleation sites of C adatoms on many other metal substrates with the C-metal bond strengths as the minimal inputs.
description: 4 figures, submitted version
Mass Function of Binary Massive Black Holes in Active Galactic Nuclei
Creators: name: Hayasaki, Kimitake
name: Ueda, Yoshihiro
name: Isobe, Naoki
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: If the activity of active galactic nuclei (AGNs) is predominantly induced by major galaxy mergers, then a significant fraction of AGNs should harbor binary massive black holes in their centers. We study the mass function of binary massive black holes in nearby AGNs based on the observed AGN black-hole mass function and theory of evolution of binary massive black holes interacting with a massive circumbinary disk in the framework of coevolution of massive black holes and their host galaxies. The circumbinary disk is assumed to be steady, axisymmetric, geometrically thin, self-regulated, self-gravitating but non-fragmenting with a fraction of Eddington accretion rate, which is typically one tenth of Eddington value. The timescale of orbital decay is {then} estimated as ~10^8yr for equal mass black-hole, being independent of the black hole mass, semi-major axis, and viscosity parameter but dependent on the black-hole mass ratio, Eddington ratio, and mass-to-energy conversion efficiency. This makes it possible for any binary massive black holes to merge within a Hubble time by the binary-disk interaction. We find that (1.8+-0.6%) for the equal mass ratio and (1.6+-0.4%) for the one-tenth mass ratio of the total number of nearby AGNs have close binary massive black holes with orbital period less than ten years in their centers, detectable with on-going highly sensitive X-ray monitors such as Monitor of All-sky X-ray Image and/or Swift/Burst Alert Telescope. Assuming that all binary massive black holes have the equal mass ratio, about 20% of AGNs with black hole masses of 10^{6.5-7}M_sun has the close binaries and thus provides the best chance to detect them.
description: 22 pages, 11 figures, accepted for publication in PASJ. The draft was significantly revised. The major differences from the previous version are as follows: (1)The circumbinary disk is assumed to be a steady, axisymmetric, geometrically thin, self-gravitating, self-regulated but non-fragmenting. (2)The stellar scattering process is taken account of in the merging process of binary black holes
Production of Almost Fermiophobic Gauge Bosons in the Minimal Higgsless Model at the LHC
Creators: name: Ohl, Thorsten
name: Speckner, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the production of the heavy W' and Z' bosons in the three site higgsless model at the LHC. We focus on the s-channel production mode to estimate the prospects for measuring their suppressed couplings to standard model fermions.
description: 25 pages, LaTeX, PS figures included