117 research outputs found
A Study of Modern Poetry
This Honors Special Studies paper briefly explores five poets, their lives, and a few of their poems
Konačna polja
U ovom diplomskom radu izneseni su osnovni pojmovi i teoremi vezani za konačna polja. Na samom početku definirani su prsteni, kao jedni od osnovnih algebarskih struktura, i sve vezano uz njih, uključujući polja. Objašnjeno je što su to prsteni polinoma i kvocijentni prsteni koji su bili potrebni za konstrukciju konačnih polja. Primjerima je pokazano na koji način možemo konstruirati konačno polje bilo kojeg reda oblika , s pomoću ireducibilnog polinoma stupnja nad . Koristeći pojam polja razlaganja dokazali smo egzistenciju i jedinstvenost konačnog polja reda . Osim toga dokazali smo Wedderburnov teorem, za koji smo definirali ciklotomijske polinome.In this thesis we present the main concepts and results which we need to define finite fields. At the beginning we define rings, as one of the fundamental algebraic structures and everything related to them, including fields. We define polynomials and residue class rings, which are required for the construction of finite fields. In examples we show how to construct a finite field of any order from a irreducible polynomial of degree over . Using the concept of splitting field, we prove the existence and uniqueness of the field of order . In addition, we prove Wedderburn’s theorem for which we define cyclotomic polynomials
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Efficient Inference, Search and Evaluation for Latent Variable Models of Text with Applications to Information Retrieval and Machine Translation
Latent variable models of text, such as topic models, have been explored in many areas of natural language processing, information retrieval and machine translation to aid tasks such as exploratory data analysis, automated topic clustering and finding similar documents in mono- and multilingual collections. Many additional applications of these models, however, could be enabled by more efficient techniques for processing large datasets.
In this thesis, we introduce novel methods that offer efficient inference, search and evaluation for latent variable models of text. We present efficient, online inference for representing documents in several languages in a common topic space and fast approximations for finding near neighbors in the probability simplex representation of mono- and multilingual document collections. Empirical evaluations show that these methods are as accurate as —- and significantly faster than —- Gibbs sampling and brute-force all pairs search respectively. In addition, we present a new extrinsic evaluation metric that achieves very high correlation with common performance metrics while being more efficient to compute. We showcase the efficacy and efficiency of our new approaches on the problems of modeling and finding similar documents in a retrieval system for scientific papers, detecting document translation pairs, and extracting parallel sentences from large comparable corpora. This last task, in turn, allows us to efficiently train a translation model from comparable corpora that outperforms a model trained on parallel data.
Lastly, we improve the latent variable model representation of large documents in mono- and multilingual collections by introducing online inference for topic models with hierarchical Dirichlet prior structure over textual regions such as document sections. Modeling variations across textual regions using online inference offers a more effective and efficient document representation, beyond a bag of words, which is usually a handicap for the performance of these models on large documents
Sõnajärg hoidjakeeles suulise kõnega võrrelduna
http://tartu.ester.ee/record=b2656667~S1*es
Evons: A Dataset for Fake and Real News Virality Analysis and Prediction
We present a novel collection of news articles originating from fake and real
news media sources for the analysis and prediction of news virality. Unlike
existing fake news datasets which either contain claims or news article
headline and body, in this collection each article is supported with a Facebook
engagement count which we consider as an indicator of the article virality. In
addition we also provide the article description and thumbnail image with which
the article was shared on Facebook. These images were automatically annotated
with object tags and color attributes. Using cloud based vision analysis tools,
thumbnail images were also analyzed for faces and detected faces were annotated
with facial attributes. We empirically investigate the use of this collection
on an example task of article virality prediction
Immunological studies of thymine dimer quantitation.
Thesis (M.Sc.)-University of Natal, Durban, 1992.Ultraviolet irradiation of DNA induces the formation of a
number of mutagenic lesions. The most prolific of these is
the cis-syn thymine dimer (formed maximally at 260 nm) and
this has been implicated in the reaction pathways that lead
to ultraviolet-induced carcinogenesis.
In order that the molecular events underlying these
neoplastic events be understood, it is imperative that the
thymine dimers formed in ultraviolet-irradiated thymine
containing systems be quantitated. In this laboratory,
dimer quantitation is performed using reverse phase high
performance liquid chromatography (HPLC) with ultraviolet
(DV) detection and the data obtained has allowed a kinetic
mechanism for lesion formation to be proposed.
Such studies have used in vitro thymine containing
substrates (aqueous thymine, thymidine, thymidylyl-3',5'thymidine,
calf thymus DNA and pUC19 plasmid DNA) to
generate the thymine dimer using DV irradiation. with the
planned extension of this research to in vivo cellular
systems (where DNA and hence thymine concentrations are
intrinsically less than those of in vitro systems), a more
sensitive technique for thymine dimer quantitation is
required.
An immunological approach to providing this technique was
chosen. Here, DV-irradiated DNA was injected into rabbits
whose immune system mounted a ' response (i.e. antibody
production) to the DV-DNA antigen. Blood was drawn from the
rabbits at regular intervals to obtain the antibodies. The
technique of immunoblotting was chosen and developed to
allow detection of the thymine dimer antigen. This involved
the reaction between the UV-DNA antigen, the primary
antibody (generated by the rabbit) and a secondary antibody
conjugated to an enzyme, all of which were immobilized on
a commercially available membrane system.
Detection and quantitation of the immune complex
immobilized on the membrane was performed using the
technique of enhanced chemiluminescence. Upon addition of
a chemiluminescent substrate (luminol) to the immune
complex, the horseradish peroxidase enzyme catalysed the
reaction of luminol, with one of the products being light
of 425 nm to 430 nm. This light impinged on a luminescence
film which was developed and printed using standard
photographic techniques. The use of dilutions of the
primary antibody in the immunoblotting protocol with
enhanced chemiluminescent detection, allowed correlations
of antibody dilutions with UV-DNA antigen to be made.
This immunoblotting technique with enhanced
chemiluminescent detection has been used successfully in
detecting thymine dimer lesion formation at levels
currently above the detection limit of the HPLC. It has
also been used successfully in detecting and quantitating
thymine dimers at levels undetectable by the HPLC. To this
end it has proved to be 4000 to 8000 times more sensitive
than the chromatographic technique.
Any immunological technique requires that the antibody of
interest be purified and characterized. Here, purification
of the crude serum was performed using the classical
technique of ammonium sulphate precipitation of proteins.
As an alternative technique, affinity chromatography was
performed on the crude serum using a Memsep 1000 affinity
chromatography cartridge attached to a preparative HPLC
system. Chromatographic data illustrating this purification
are given. Characterization of the DV-DNA antigen was
performed by considering the specificity of the antibody
response in the laboratory animal.
Support for the kinetic mechanisms previously proposed for
pyrimidine dimer formation in DNA is also given in this
work. Calf thymus DNA was irradiated and dimer yields
obtained by immunoblotting. These were used in the computer
programme CAKE together with the previously determined rate
constants to determine simulated dimer yields. A good
agreement between experimental and simulated data indicated
the validity of the mechanism at a DNA concentration of
0.025 mg/ml
National security and refugee crisis: Policy and treatment of Republic of Croatia towards refugees from Middle East
Glavna tema ovog diplomskog rada je Nacionalna sigurnost i izbjeglička kriza: Politika i postupanje Republike Hrvatske prema izbjeglicama s Bliskog istoka. Rad se također bavi i pojmovima kao što su: međunarodna sigurnost, utjecaj globalizacije u današnjem svijetu te suvremena problematika migracija i izbjeglica. Pismenim anketama, koje su se ispunjavale na području Dubrovnika i Rijeke, provelo se istraţivanje kojim su se nastojali utvrditi stavovi građana prema izbjeglicama s Bliskog istoka. Rezultati istraţivanja pokazali su kako je tolerancija građana prema izbjeglicama uvjetovana duljinom njihovog boravka u Republici Hrvatskoj te kako bi podrška prema njima bila u znatnom padu u slučaju njihovog trajnog zadrţavanja u Republici Hrvatskoj. Istraţivanje je također dokazalo kako bi se stupanj tolerancije prema izbjeglicama u slučaju njihovog trajnog zadržavanja smanjio unatoč tolerantnijem nasljeđu nekih gradova.The main focus of this thesis is National security and refugee crisis: Policy and treatment of Republic of Croatia towards refugees from Middle East. This thesis also describes themes such as national security, international security, influence of globalization on a modern society and todays issues of migrations and refugees. The research was held in towns Dubrovnik and Rijeka and was done by written surveys in order to affirm views on refugees from Middle East. The research has proven that the tolerance towards refugees is conditioned with their passing through Croatian border and that support towards refugees from Middle East will be much smaller in case of their permanent stay in Croatia. The research has also proven that in case of a permanent stay of the refugees, support towards them will be much smaller even in case of a tolerant heritage of some cities
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