Analysis of Balmer Profiles of early type stars

The spectral energy distribution (SED) of recent star formation regions is dominated by the more massive and early stars (O and B types). These stars show large and very significant absorption features, the most prominent being the recombination lines of H, HeI and HeII. In particular, the shape of their profiles are very dependent on the luminosity of the star. We have explored the potential use of high resolution profiles to discriminate between different luminosity classes and spectral types, by using profiles of the He and Balmer lines. We have calculated growth curves for each of the lines and their dependence on gravity and effective temperature. We show some of these theoretical growth curves and our preliminary conclusions are analyzed and discussed.Comment: 1 pag, Contribution to the conference "Cosmic Evolution and Galaxy Formation: Structure, Interactions and Feedback", Nov. 1999 (Puebla, Mexico), to be published in ASP. Conf. Series, Eds. J. Franco, E. Terlevich. O. Lopez-Cruz, I. Aretxag

V, R, I and Halpha photometry of circumnuclear star forming regions in four galaxies with different levels of nuclear activity

V,R,I continuum bands and Halpha + [NII] photometry for circumnuclear star forming regions (CNSFR) is presented, for galaxies with different kinds of nuclear activity: NGC 7469 (Sy 1), NGC 1068 (Sy 2), NGC 7177 (LINER) and NGC 3310 (Starburst). Their Halpha luminosities (0.02 - 7x10**40 erg/s; uncorrected for internal extinction), are comparable to those observed in other galaxies. No systematic differences in the broad band colours are found for the CNSFR in the different galaxies, except for those in NGC 3310 which are considerably bluer, partially due to a younger stellar population. Using theoretical evolutionary synthesis models some colours can be reproduced by single populations (between 7 and 300 Myr) and extinction 0.5-1.5 mag). However, in many cases, the observed equivalent width of Halpha, require a younger population. NGC 1068, 7177 and 7469, are fitted by a two-burst population model at solar metallicity; the age difference between both populations is around 5-7 Myr and the younger burst involves 3 - 61% of the total mass of the cluster,consistent with the younger burst being originated by supernova activity from the previous one. NGC 3310, requires younger ionizing population ages and lower metallicity. An excess (R-I) observed/predicted, not consistent with a normal reddening law can be atributted to red supergiants present in the older population, and not properly accounted for by the models. The two-population scenario seems to show a trend of the evolutionary state of the CNSFR with the nuclear type of the parent galaxy that remains to be explored.Comment: Accepted for publication in MNRAS, 22pages, 11 figure

Microaerosol and Nanoparticle Synthesis for Drug Delivery via Surface Acoustic Wave Atomization

We describe the fabrication of a surface acoustic wave (SAW) atomizer, and show its ability to generate monodisperse aerosol and particles for drug delivery applications. In particular, we demonstrate the generation of insulin microdroplets for pulmonary delivery, and polymeric nanoparticles for one-step rapid encapsulation using SAW devices with resonance frequencies of 8.6 MHz and 19.3 MHz. Insulin droplets around 4 μm were obtained, matching the optimum range for maximising droplet absorption in the alveolar region. Nanoscale polymer particles (130- 220 nm in diameter) were obtained through a non-equilbrium evaporation and nucleation process, thereby presenting a quick and simple means for nanoparticle synthesis. These results exhibit the feasibility of SAW as a novel method for producing particles and droplets of controlled sizes

Entonació i pressuposició en les declaratives, interrogatives totals, interrogatives totals d'apèndix i interrogatives totals indroduïdes per que, del català central

Treballs Finals de Grau de Lingüística. Facultat de Filologia. Universitat de Barcelona, Curs: 2019-2020, Tutor: Paolo Roseano[cat] Aquest estudi s’ocupa de la relació entre el contorn d’F0 i el posicionament epistèmic del parlant en les construccions declaratives, en les construccions interrogatives totals d’apèndix, en les construccions interrogatives totals i en les construccions interrogatives totals introduïdes per que, del català central. Per tal d’esbrinar quina és aquesta relació, s’han realitzat dos tipus de tasques o testos de percepció (una tasca d’adequació i una tasca d’avaluació del grau de pressuposició), basats en les tasques de l’estudi de Vanrell et al. (2010b). Els resultats d’aquest estudi confirmen que hi ha diferents graus de pressuposició, en funció del tipus de construcció i que els oients de català central són capaços de detectar quina és l’entonació adequada en dos contextos pragmàtics diferents.[eng] The aim of this dissertation is to study the relationship between the F0 contour and the speaker’s epistemic position on the declarative constructions, on the appendix’s total interrogative constructions, on the total interrogative constructions and on the total interrogative constructions introduced by que, of central Catalan dialectal variety. In order to find out which this relation is, two different perception tasks have been carried out (an adequation task and an evaluation of the presupposition’s degree task). The design of these tasks was based on the Vanrell et al. (2010b) study. The results have shown that there are different presuppositional degrees, according to the different kinds of construction. Moreover, the results have shown that central Catalan listeners are able to detect which is the adequate intonation in two different pragmatic contexts

Analysing specialized use of verbs: the case of some Catalan trajectory verbs in the sport domain

[EN]This master thesis presents a syntactic-semantic analysis of 5 Catalan verbs of trajectory class (aconseguir (to achieve), arribar (to arrive), avan ̧car (to move forward), entrar (to enter) and sortir (to come out)) in the sport domain. The master thesis starts from the hypothesis based on the Communicative Theory of Terminology (CTT) (Cabr ́e, 2001; Adelstein and Cabr ́e, 2003) and the study done by Casademont (2014) about specialized uses of verbs. To perform the analysis of verbs, reliance has basically been placed on the book Clasificaci ́on verbal. Alternancias de di ́atesis (V ́azquez et al., 2000) and on the AnCora’s verbal lexicon (Taul ́e et al., 2011). The analysis has been done on the data of a sport news corpus, actually created for this study. The results of this study have shown that some verb senses appear most often in the sports domain than others, they have also shown that some specific structures exist for the sport domain and that arguments referring to the trajectory can present ellipsis for some verbs. In addition, in this master thesis, a Natural Language Processing task on event argument extraction (EAE) has been carried out too. Due to lack of resources and that the model used was not trained for Catalan, no reliable results have been achieved. (English)[EU]Master-tesi honetan kokapen-aldaketa motako 5 aditz katalan aztertu dira kirol domeinuan: aconseguir (lortu), arribar (iritsi), avançar (aurrera egin), entrar (sartu) eta sortir (atera). Azterketa honen abiapuntua Terminologiaren Teoria Komunikatiboa (Cabré, 2001; Adelstein and Cabré, 2003) eta Casademont-ek (2014) aditzen erabilera espezializatuei buruz egindako azterketa dira. Horietan oinarrituta, aditzen analisia egiteko, Clasificación verbal. Alternancias de diátesis (Vázquez et al., 2000) liburua eta katalanezko AnCora lexikoa hartu dira oinarri gisa (Taulé et al., 2011). Azterketa egiteko, kirolari buruzko corpus bat bildu da. Azterketaren emaitzek erakutsi dute kokapen-aldaketa aditzen adiera batzuk maizago agertzen direla kirol-arloan beste batzuk baino. Orobat, emaitzek erakutsi dute, batetik, badirela kirol-arloan berariazkoak diren egitura batzuk, eta, bestetik, kokapen-aldaketa adierazten duten argumentuek elipsia izan dezaketela zenbait aditzetan. Horretaz gain, hastapeneko esperimentu bat egin da Hizkuntzaren Prozesamenduko ataza batean, ebentuen argumentuen erauzketan hain zuzen ere. Nolanahi ere, baliabide faltagatik eta erabilitako eredua ez delako katalanarentzat entrenatu, ez da emaitza fidagarririk lortu

The Limits of Forgiviness in International Relations: Groups Supporting the Yasukuni Shrine in Japan and Political Tensions

Visits (or attempts to visit) to the Yasukuni Shrine by Japanese officials have generated a series of controversies and tensions between the countries occupied by imperialist Japan during the Pacific War. The central dilemma is that Yasukuni, emblem of Japanese militarism, questions the coherence and consistency of the requests for forgiveness made by different Japanese prime ministers to countries in the region in repentance for atrocities and violations of human rights committed in the past. The weakness of the apologies is not an exclusive problem of Japan. On the contrary, the official pardon granted by one state to another has become an increasingly common practice, but questioned in international relations. The limits of apologies in the process of reconciliation between states have led to a new research strand, aligned with the debates on transitional justice, which discusses dimensions of the level of forgiveness in terms of rectification processes. From this perspective, previous research shows that there is a tendency to analyse the case of Yasukuni without delving into the social groups that support the shrine and define the agenda of prominent personalities of local politics, especially linked to the ruling party, the Liberal Democratic Party (LDP), who claim Yasukuni. Faced with this gap, this article examines the characteristics and modes of action of the groups in favour of Yasukuni and the responses from China and South Korea to the visits to the shrine by officials, in order to understand the peculiarities and scope of forgiveness in East Asia.Fil: Alvarez, Maria del Pilar. Universidad del Salvador. Facultad de Ciencias Sociales. Instituto de Investigación en Ciencias Sociales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Lunaklick, María del Mar. No especifíca;Fil: Muñoz, Tomás. No especifíca

Role of New Functional MRI Techniques in the Diagnosis, Staging, and Followup of Gynecological Cancer: Comparison with PET-CT

Recent developments in diagnostic imaging techniques have magnified the role and potential of both MRI and PET-CT in female pelvic imaging. This article reviews the techniques and clinical applications of new functional MRI (fMRI) including diffusion-weighted MRI (DWI), dynamic contrast-enhanced (DCE)-MRI, comparing with PET-CT. These new emerging provide not only anatomic but also functional imaging, allowing detection of small volumes of active tumor at diagnosis and early disease relapse, which may not result in detectable morphological changes at conventional imaging. This information is useful in distinguishing between recurrent/residual tumor and post-treatment changes and assessing treatment response, with a clear impact on patient management. Both PET-CT and now fMRI have proved to be very valuable tools for evaluation of gynecologic tumors. Most papers try to compare these techniques, but in our experience both are complementary in management of these patients. Meanwhile PET-CT is superior in diagnosis of ganglionar disease; fMRI presents higher accuracy in local preoperative staging. Both techniques can be used as biomarkers of tumor response and present high accuracy in diagnosis of local recurrence and peritoneal dissemination, with complementary roles depending on histological type, anatomic location and tumoral volume

Design and analysis of clustering algorithms for numerical, categorical and mixed data

In recent times, several machine learning techniques have been applied successfully to discover useful knowledge from data. Cluster analysis that aims at finding similar subgroups from a large heterogeneous collection of records, is one o f the most useful and popular of the available techniques o f data mining. The purpose of this research is to design and analyse clustering algorithms for numerical, categorical and mixed data sets. Most clustering algorithms are limited to either numerical or categorical attributes. Datasets with mixed types o f attributes are common in real life and so to design and analyse clustering algorithms for mixed data sets is quite timely. Determining the optimal solution to the clustering problem is NP-hard. Therefore, it is necessary to find solutions that are regarded as “good enough” quickly. Similarity is a fundamental concept for the definition of a cluster. It is very common to calculate the similarity or dissimilarity between two features using a distance measure. Attributes with large ranges will implicitly assign larger contributions to the metrics than the application to attributes with small ranges. There are only a few papers especially devoted to normalisation methods. Usually data is scaled to unit range. This does not secure equal average contributions of all features to the similarity measure. For that reason, a main part o f this thesis is devoted to normalisation.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Soft Optomechanical Systems for Sensing, Modulation, and Actuation

Altres ajuts: CERCA Programme/Generalitat de Catalunya ; the Government of Catalonia's Agency for Business Competitiveness (ACCIÓ) (TECSPR19-1-0021)Soft optomechanical systems have the ability to reversibly respond to optical and mechanical external stimuli by changing their own properties (e.g., shape, size, viscosity, stiffness, color or transmittance). These systems typically combine the optical properties of plasmonic, dielectric or carbon-based nanomaterials with the high elasticity and deformability of soft polymers, thus opening the path for the development of new mechanically tunable optical systems, sensors, and actuators for a wide range of applications. This review focuses on the recent progresses in soft optomechanical systems, which are here classified according to their applications and mechanisms of optomechanical response. The first part summarizes the soft optomechanical systems for mechanical sensing and optical modulation based on the variation of their optical response under external mechanical stimuli, thereby inducing mechanochromic or intensity modulation effects. The second part describes the soft optomechanical systems for the development of light induced mechanical actuators based on different actuation mechanisms, such as photothermal effects and phase transitions, among others. The final section provides a critical analysis of the main limitations of current soft optomechanical systems and the progress that is required for future devices

Array of Microfluidic Beam Resonators for Density and Viscosity Analysis of Liquids

This paper reports on the design, fabrication, and evaluation of a mass density and viscosity sensor based on an array of polysilicon microbeam resonators integrated with 20 pL fluidic microchannels. When filled with water, resonators exhibit resonant frequencies close to 500 KHz and Q-factor values of 400 operating at atmospheric pressure and ambient temperature. Real-time measurements are highly reproducible and only require 250 μL of the sample fluid. The built-in interferometric readout enables automatic detection of the beams increasing the throughput analysis and reducing detection times. The frequency shift response shows a linear behavior in accordance with the density of evaluated solvents, organic solutions, and alcoholic drinks, reporting a mass responsivity of 7.4 Hz/pg. Also, the sensor is capable of measuring the viscosity of liquid phase samples with a resolution of 0.15 cP by tracking the Q-factor response of the sensor within a linear regime between 1 to 2.6 cP. This approach demonstrates the ability to identify in real-time changes of fluids in the liquid phase that could provide a valuable assessment for bioanalytical applications