416 research outputs found
Estudio del uso de nanopartículas de oro y plata para el desarrollo de un sensor de fibra óptica de H₂O₂
No full textLos sensores de fibra óptica basados en la intensidad de luz son uno de los enfoques
más estudiados gracias a su sencillez y bajo coste. Sin embargo, su principal problema
es la falta de robustez ya que la fluctuación (variación) de la fuente de luz o la variación
inesperada de la configuración óptica se transfiere directamente a la señal de salida, y
esto reduce significativamente su fiabilidad.
En este trabajo, se propone un sensor de fibra óptica simple y robusto para la
detección de Peróxido de Hidrógeno (H₂O₂)
basado en la Resonancia del Plasmón
Superficial Localizado (LSPR) de nanopartículas metálicas de Plata y Oro.
La detección
precisa y robusta de concentraciones
de concentraciones de H₂O₂
en el rango ppm
(partes por millón)
es muy interesante para la comunidad científica
en la medida en
que se trata de un precursor patológico en una amplia variedad de mecanismos de
daño donde su presencia puede ser utilizada para diagnosticar importantes
enfermedades
(Parkinson, Diabetes, Asma o incluso Alzheimer).
En este trabajo, el
principio de detección se basa en la oxidación de las partículas de Plata debido a la
acción del Peróxido de Hidrógeno
y, consecuentemente en la reducción de la eficiencia
del acoplamiento plasmónico.
Al mismo tiempo, las nanopartículas de Oro muestran una alta estabilidad química
y, por lo tanto, una banda de absorción LSPR estable. Esto proporciona
una referencia
en tiempo real que puede ser extraída a partir de la respuesta espectral del sensor de
fibra óptica, dando una lectura fiable de la concentración de Peróxido de Hidrógeno.Intensity-based optical fiber sensors are one of the most studied sensor approaches
thanks to their simplicity and low cost. Nevertheless; their main issue is their lack of
robustness since any light source fluctuation; or unexpected optical setup variation is
directly transferred to the output signal; and this reduces significantly their reliability.
In this work; it is proposed a simple and robust hydrogen peroxide (H₂O₂) optical fiber
sensor based on the sensitivity of Localize
d Surface Plasmon Resonance (LSPR) of silver
and gold metallic nanoparticles. The precise and robust detection of H₂O₂
concentrations in the ppm range is very interesting for the scientific community as far
as it is a pathological precursor in a wide variety of damage mechanisms where its
presence can be used to diagnose important diseases (Parkinson; diabetes; asthma or
even Alzheimer). In this work; the sensing principle is based the oxidation of the silver
nanoparticles due the action of the hydrogen peroxide; and consequently the
reduction of the efficiency of the plasmonic coupling. At the same time; gold
nanoparticles show a high chemical stability; and therefore a stable LSPR absorption band. This provides a stable real-time reference that can be extracted from the
spectral response of the optical fiber sensor; giving a reliable reading of the hydrogen
peroxide concentration.Graduado o Graduada en Ingeniería en Tecnologías de Telecomunicación por la Universidad Pública de NavarraTelekomunikazio Teknologien Ingeniaritzako Graduatua Nafarroako Unibertsitate Publikoa
The use of multi-objective genetic algorithm (MOGA) in optimizing and predicting weld quality
No full textThe search for acceptable optimal or near-optimal weld process parameters through the application of suitable optimization technique cannot be over emphasized, as this will help prevent weld defects capable of causing remarkable decrease in the mechanical properties of welded joints. This study explodes the application of multi-objective genetic algorithm (MOGA), an evolutionary optimization technique, alongside a regression model, in finding the optimal process parameters of a GTAW welded mild steel plate. Analysis of variance ANOVA was used in determining the significance of the model as well as studying the main and interactive effects of the process parameters on the responses. With the mathematical models obtained, used as objective functions, the genetic algorithm provided the best optimization on the 186th generation. An optimal weld strength of 546.8 N/mm2 and hardness of 159.1 at the combined input variable of 140 ampere welding current, 24.9 V weld voltage, 20 l/min gas flow rate, and 2.4 mm filler rod diameter were obtained. Confirmatory tests conducted using the generated optimal results showed that the percentage of error was within the permissible limit of 5%, a validation of the optimization technique
Estudió, análisis y modelización mediante SAP2000 de la estructura del Centro Roberto Garza Sada
No full text[ES] Uno de los principios básicos que destacaba Vitruvio era la firmeza o “Firmitas”, hablaba de la sustentación sólida del edificio, de la estructura. La estructura es la parte más importante de cualquier obra porque de ella depende la seguridad de sus ocupantes. En este trabajo se ha realizado el estudio al completo de una estructura singular como es el CRGS, un reto estructural al servicio del arquitecto Tadao Ando. Primero se realizará un análisis del arquitecto y de su obra, destacando los aspectos más importantes de su arquitectura, para posteriormente, estudiar y comprender el edificio en cuestión. A continuación se muestra la modelización del edificio, procediendo a enumerar los aspectos que se han tenido en cuenta a la hora de analizar la estructura. Así como una explicación del proceso de cálculo mediante el programa SAP2000. Y por último, se analizarán los resultados obtenidos del programa para comprobar la solución adoptada y la estabilidad estructural.[EN] One of the basic principles that stood out Vitruvius was the firmness or "Firmitas", he
spoke of the solid support of the building, of the structure. Structure is the most important part of any work because it depends on the safety of its occupants. In this work has been carried out complete study of a singular structure such as the CRGS, a structural challenge at the service of the architect Tadao Ando. First, an analysis of the architect and his work will be carried out, highlighting the most
important aspects of his architecture, to later study and understand the building in question. Below is the modeling of the building, proceeding to list the aspects that have been taken into account when analyzing the structure. As well as an explanation of the calculation process through the SAP2000 program. Finally, the results obtained from the program will be analyzed to verify the adopted
solution and the structural stability.Rubio Pallardó, S. (2017). Estudió, análisis y modelización mediante SAP2000 de la estructura del Centro Roberto Garza Sada. https://riunet.upv.es/handle/10251/110884TFG
Franz Thiard de Laforest (1838-1911) — Author of the Book Die Bocche di Cattaro, 1898.
No full textNakon prikaza knjige o Splitu i njegovim starinama becčkog fotografa Franza Thiarda de Lafresta u prethodnom broju Peristila, autorica sada govori o njegovoj drugoj knjizi "Die Bocche di Cattaro" iz 1898. i do sada nepoznatog teksta o Tripunu Kokolji — kamenčić koji je nedostajao. U ovom napisu najprije se bavi dijelovima knjige koji su pretežno putopisnog karaktera, da bi zatim, u poglavlju o Madoninu otoku, ukazala na jedan do sada nepoznati Laforestov tekst o peraštanskom slikaru Tripi Kokolji, koji je nakon školovanja u Veneciji, svojim vrlo kvalitetnim slikama opremio i ukrasio crkvu Gospe od Škrpjela na otočiću pred Perastom. Autorica u tom tekstu pronalazi mnogo originalnosti i smionosti naročito u ocjenjivanju Kokoljina djela i konstatira da je Laforestova valorizacija iz 1898. bila, od svih tekstova o toj temi najbliža suvremenim pogledima i ocjenama dr. Krune Prijatelja, objavljenih u njegovu kapitalnom djelu o Tripi Kokolji iz 1952. godine.In this study the author returns to the interesting personality of the Viennese photographer Franz Thiard de Laforest (Vienna, 1838 — Kotor, 1911), about whom she wrote in the latest issue of the Peristil (45, 2002). Therein she described and analyzed his book Spalato und seine Alterthümer (1878), in which Laforest figured as the author of the text and the original photographs, and as publisher.
This study deals with another Laforest book, Die Bocche di Cattaro from 1898, in which he again appears both as the author and publisher. The author of the study first describes the travel related sections of the book, and then, in the chapter on the Madonna's Island she singles out a so far unknown texts by Laforests on Tripo Kokolja (Perast, 1661 — Korčula, 1713), a painter from Perast who, after studies in Venice, painted high quality paintings for the church of Our Lady of Škrpjel on an island in front of Perast.
In the analysis of the text (which is quoted in totality) she has discovered several original and daring evaluations of Kokolja's work, in particular on Venetian influences, as Laforest, in opposition to many other writers, denies any influence of great Renaissance artists. She concludes that Laforest's ideas came closest to those of contemporary scholars, e.g., Dr. Kruno Prijatelj as expressed in his capital work on Tripo Kokolja (1952).
Laforest's text has been overlooked by all experts and it does not appear in any bibliography on Kokolja, not even in that by Prijatelj; the author corrects this oversight and accords the Laforest text its deserved place as a missing piece on Kokolja oeuvre.
At the end of the book there is a long list of 190 photographs, Laforest had been taking along the Dalmatian coastland since the sixties. The list is accompanied by an album entitled "Album von Dalmatien — Photogtaphien aus der Anstalt von Franz Laforest in Cattaro." The album contains in the original format of 24 x 30 centimeters all the photographs listed.
The author has selected several reproduction from the book, and also a dozen photos from the large album on Dalmatia containing some of the earliest, and the best, photographs of Dalmatian cathedrals of Zadar, Šibenik, Split, Dubrovnik, and Kotor. The series of reproductions ends with a picture of the Old Bridge in Mostar, considered one of Laforest's masterpieces
Slobodan Milošević i Franjo Tuđman o statusu Bosne i Hercegovine 1991:
No full textČlanak se bavi razgovorima Slobodana Miloševića, predsednika
Srbije i Franje Tuđmana, predsednika Hrvatske tokom jugoslovenske
krize 1991. o statusu Bosne i Hercegovine. Ti razgovori su poznati
kao dogovor o „podeli“ Bosne i Hercegovine i do sada je o njima pisano
samo na osnovu svedočenja učesnika razgovora. U Sudskoj arhivi
Međunarodnog krivičnog suda za bivšu Jugoslaviju u Hagu, nalazi se
dokument koji potvrđuje da su razgovori o „podeli“ Bosne zaista vođeni,
da su nastavljeni 1992. i da je u njih bilo uključeno i rukovodstvo bosanskih
Srba.The article is written on talks between Slobodan Milosevic, President of
Serbia, and Franjo Tudjman, the Croatian president of the Yugoslav crisis 1991st
on the status of Bosnia and Herzegovina. These talks are known as an agreement
on the „division“ of Bosnia and Herzegovina and have written about them only
on the basis of testimony of participants in the talks. The Judicial Archives International
Tribunal for Former Yugoslavia in Hague is a document that confirms
that talks about the „division“ of Bosnia indeed led to continued 1992nd and that
they were involved in the Bosnian Serb leadership. In 1992. Followed chaotic
and tragic events – plebiscite of independence, unsuccessful negotiations in Portugal
under the auspices of the European Union, recognition of independence of
Bosnia and Herzegovina 6th April and withdrawal of the Yugoslav Army – who
are the former "Yugoslav bastion“ pushed into the abyss of civil war three years.Published147039Rad je deo projekta (Ne)uspešna integracija – (ne)dovršena modernizacija: međunarodni
položaj i unutrašnji razvoj Srbije i Jugoslavije 1921–1991 (147039), koji finansira Ministarstvo
za nauku i tehnološki razvoj Republike Srbije
EFL/ESP teacher development and classroom innovation through teacher-initiated action research
No full textThis study is an investigation of the potential of teacher-initiated action research for
EFL/ESP teacher development and classroom innovation. The Collaborative Academic
Writing Research Project (CAWRP), on which it is based, was carried out at the ESP
Centre, Damascus University, in 1996-1997. It was in two phases, Baseline and
Main. The researcher, a teacher in the context, assumed a participatory and facilitating
role. The pedagogic problem was the teaching of research paper writing to
postgraduate students. The CAWRP was proposed to ease this problem and introduce
classroom innovation through teacher-initiated action research, the long-term aim of
which was continuous professional development. The baseline research aimed at
articulating a picture of teacher and context needs and assessing project viability. The
proposal was refined in the light of the findings, and a programme of teacher
development activities was agreed with the participants. This was implemented in the
Main Phase, which had three stages: Orientation, Research and Reporting, and
Summative Evaluation and Follow-up. The role of the researcher was to facilitate the
teachers to self-direct their professional learning and introduce needed pedagogic
innovations.
The thesis is in eight chapters and 32 appendices. Chapter One sets the scene
and introduces the study. Chapter Two focuses on the baseline investigation: its
methodology, findings, and their implications for the Main Phase study. Chapter Three
is a review of the relevant literature in the fields of teacher development and classroom
innovation. Chapter Four focuses on project design and methodology and gives more
details on the principles, values, strategies, and procedures that guided project
implementation and how they worked out in action. Chapter Five reports the findings,
focusing on the contribution of the Orientation Stage activities to the development of
the teacher group as a whole (a total of 20 out of 23 Centre teachers). Its main sources
of data are recordings, feedback questionnaires, and participant observation. Chapter
Six focuses on the teachers who carried out action research and reported on it (8 out
of the 20 Orientation Stage participants). It presents two case studies of frill
participants, starting with their entry points and showing how they developed in the
Research and Reporting Stage. One case exemplifies the experienced teachers and
those who did research individually, and the other the novices and those who worked in
collaboration. Chapter Seven reports on the participants' sununative evaluation of the
project and the effect of this evaluation on project continuity. Chapter Eight
summarises the main findings and evaluates them with reference to the literature, on
the one hand, and design principles and methodology, on the other. In this chapter, I
have looked critically at the lessons learnt from the study, discussed its significance and
limitations, and put forward some recommendations. The appendices include some of
the materials and documentary evidence used in the research
SPORAZUM O PRIZNANjU KRIVICE U PRAVU EVROPSKIH ZEMALjA: PRIMJER ITALIJE
No full textThe author in this work elaborates about institute known as plea bargaining. Plea bargaining is the institute from the AngloAmerican legal law system which in the last 30-ish years taking a significant place in the Criminal Procedure Codes among the European countries, approaching on that way two different legal law systems. The first European country, who introduces in her legal system plea bargaining, was Italy. Through analyses provisions of the law, the author concludes that the plea bargaining is on the good way to be widely exerted. After Italy, every country in the Europe incorporated in her legal system plea bargaining, with more or less differences. The paper brings review of provisions of the new Italian Codice di Procedura Penale from the year of 1988. New Code was very revolutionary and bring much new in the law. The most important news was plea bargaining. The author concludes that plea bargaining is not in the enough use. The reasons for that we can search in the, for now, a small area of appliance.Sporazum o priznanju krivice je institut anglo-američkog pravnog sistema koji poslednjih trideset godina zauzima značajno mjesto i u krivično-procesnim zakonodavstvima evropskih zemalja, približavajući na taj način dva različita pravna sistema. Prva evropska država, koja je uvela u svoje zakonodavstvo sporazum o priznanju krivice, odnosno, dogovaranje o kazni, bila je Italija. To je učinila zbog porasta stope kriminaliteta i nemoći zakonodavnih rješenja da spriječe ili makar pospješe suzbijanje te pojave. Već 1981. godine, u još uvijek važeći Zakonik o krivičnom postupku, tzv. Rokov Zakonik o krivičnom postupku, pokusno je uvedeno dogovaranje o kazni, sa jako uskim poljem primjene. Međutim, godine 1988. u Italiji se donosi novi Zakonik o krivičnom postupku, u kojem je, između ostalog proširena oblast primjene sporazuma o priznanju krivice, poznatijeg kao patteggiamento. Nakon toga, došlo je do još jedne promjene odredbi Zakonika, 2003. godine, kojom je, za sada, dovršeno priširivanje primjene sporazuma o priznanju krivice. U ovom radu, ukratko ćemo se osvrnuti na zaokret evropskih zakonodavstava ka adverzijalnom modelu i usvajanje američkih rješenja u italijanskom zakonodavstvu, a detaljno ćemo obraditi institut sporazuma o priznanju krivice, odnosno, patteggiamento-a
Don Miho Pešić — Dubrovački slikar 18. stoljeća i njegovo doba
No full textThe author has discussed the work of Don Miho Pešić, an interesting 18 century painter from Dubrovnik. So far he has been studied only as a cartographer and diplomat. His will and newly discovered portrait paintings, as well as handwritten books in the State Archives in Dubrovnik, have broadened the picture showing Don Miho to be also a painter of heraldic themes, and portraitist of Dubrovnik's high clergy and civil servants. Don Miho did not stand alone in the field of native Baroque painting. The author lists a number of so far unknown, or almost unknown, names of Dubrovnik Baroque painters preceding the »Trefoil« of Dubrovnik Baroque Classicism.Autor se bavi likovnim opusom dubrovačkog svečenika don Miha Pešića, zanimljive pojave dubrovačkog XVIII. stoljeća. Do sada se o njemu pisalo kao o kartografu i diplomatu, a na osnovu sačuvane oporuke i pronađenih portreta u dubrovačkom dominikanskom samostanu i rukopisnih knjiga u Državnom arhivu u Dubrovnika zaokružila se slika o ovom heraldičaru i portretistu visokih dubrovački crkvenih prelata i diplomata. Don Miho Pešić nije bio osamljena pojava u domaćem baroknom slikarstvu, stoga autor donosi više do sada nepoznatih ili gotovo nepoznatih imena dubrovačke barokne likovne scene što je prethodila dubrovačkom slikarskom »trolistu« baroknog klasicizma
HARMONIZACIJA KOMPANIJSKOG PRAVA SA PRAVOM EVROPSKE UNIJE I PRAVILA O SLOBODI OSNIVANjA PRIVREDNIH DRUŠTAVA U SPORAZUMU O STABILIZACIJI I PRIDRUŽIVANJU
No full textHarmonisation of Serbian law with that of the European Union is an obligation undertaken unilaterally by Serbia so as to accomplish its goal of joining the European Union. By far the most important document Serbia has signed in this process so far is the Stabilisation and Association Agreement. The paper analyzes the Agreement provisions prescribing rules on free movement of companies from Serbia and the EU and underlines the importance of being familiar with the European Court of Justice jurisprudence on this matter. Furthermore, the author analyzes the degree to which Serbian company law rules are harmonised with that of the EU and outlines the expected developments in law and practice in both areas.Usklađivanje propisa Srbije sa pravom Evropske unije jednostrana je obaveza koju je Srbija preuzela radi ostvarivanja cilja - pristupanja Evropskoj uniji. Svakako najznačajniji dokument koji je Srbija do sada potpisala u tom postupku jeste Sporazum o stabilizaciji i pridruživanju. U radu se analiziraju odredbe Sporazuma kojima se propisuju pravila o slobodnom kretanju privrednih društava iz Srbije i Unije, i ukazuje na značaj poznavanja prakse Evropskog suda pravde u vezi sa ovim pitanjem. Nadalje, autorka analizira stepen usklađenosti domaćih propisa iz oblasti kompanijskog prava sa odgovarajućim propisima Evropske unije i ukazuje na očekivane pravce daljeg razvoja prava i prakse u obe oblasti
Odgovornost država prema konvenciji o genocidu – pitanja nadležnosti u novijoj praksi međunarodnog suda
No full textThe author analyses certain questions regarding the jurisdiction of the International Court of Justice under the Convention on the Prevention and Punishment of the Crime of Genocide in the most recent cases deliberated before the Court. Special attention is given to the decisions in the cases The Gambia v. Myanmar and Ukraine v. Russian Federation in which the Court discussed issues of a preliminary character relevant for the establishment of its (prima facie) jurisdiction. Hence, the author particularly addresses the questions of the existence of a dispute between the parties, the ratione personae jurisdiction of the Court, the erga omnes character of obligations under the Convention, jus standi of the parties before the Court, the relationship between Articles VIII and IX of the Convention, and the problem of the use of force for the purpose of preventing or punishing genocide. In the author´s opinion, despite the fact that it has not yet been decided on the merits in the analysed cases, the decisions made so far are significant in two ways. On the one hand, they strengthen the Convention in terms of reaffirmation of the prerequisites for the establishment of the jurisdiction of the Court, and, on the other, they contribute to the preservation of the fundamental principles of international law and the rules on State responsibility, as well as to the prevention of future acts of genocide.Autorica analizira određena pitanja o utvrđivanju odgovornosti država prema Konvenciji o sprječavanju i kažnjavanju zločina genocida i najnovijim slučajevima koji se razmatraju pred Međunarodnim sudom. Posebna se pažnja posvećuje odlukama Suda u slučajevima Gambija protiv Mijanmara i Ukrajina protiv Ruske Federacije te interpretaciji odredaba Konvencije o genocidu koje se odnose na uspostavljanje nadležnosti Suda. U tom se kontekstu osobito analiziraju pitanja preliminarnog karaktera, poput postojanja spora između stranaka, nadležnosti Suda ratione personae, erga omnes obveze koje proizlaze iz Konvencije, jus standi stranaka pred Sudom, odnosa između članaka VIII i IX Konvencije, kao i pitanja uporabe sile radi sprječavanja ili kažnjavanja genocida. Po mišljenju autorice, unatoč tomu što u analiziranim slučajevima još nije odlučeno o meritumu, do sada donesene odluke imat će znatan utjecaj na ispravnu i učinkovitu primjenu Konvencije o genocidu u budućnosti, u smislu pojašnjavanja preduvjeta za uspostavu nadležnosti Suda, kao i očuvanja temeljnih načela međunarodnog prava i pravila o odgovornosti država
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