Number of results to display per page
Search Results
1932. An extension of the ordering based on nullnorms
- Creator:
- Aşici, Emel
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- distributivity, bounded lattice, nullnorm, and partial order
- Language:
- English
- Description:
- In this paper, we generally study an order induced by nullnorms on bounded lattices. We investigate monotonicity property of nullnorms on bounded lattices with respect to the F-partial order. Also, we introduce the set of incomparable elements with respect to the F-partial order for any nullnorm on a bounded lattice. Finally, we investigate the relationship between the order induced by a nullnorm and the distributivity property for nullnorms.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1933. An extension theorem for modular measures on effect algebras
- Creator:
- Barbieri, Giusepina
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- effect algebras, modular measures, extension, Vitali-Hahn-Saks theorem, Nikodým theorem, decomposition theorem, control theorems, range, and Liapunoff theorem
- Language:
- English
- Description:
- We prove an extension theorem for modular measures on lattice ordered effect algebras. This is used to obtain a representation of these measures by the classical ones. With the aid of this theorem we transfer control theorems, Vitali-Hahn-Saks, Nikodým theorems and range theorems to this setting.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1934. An ideal biological marker of Alzheimer's disease: dream or reality?
- Creator:
- Daniela Řípová and Anna Strunecká
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, Alzheimerova choroba, bílkoviny, recenze, Alzheimer's disease, proteins, reviews, biological peripheral marker, β-amyloid, 14, and 612
- Language:
- English
- Description:
- Senile dementia of Alzheimer´s type (AD) is commonly characterized as a neurodegenerative disorder, which exhibits gradual changes of consciousness, loss of memory, perception and orientation as well as loss of personality and intellect. AD prevalence increases dramatically with age and is the fourth cause of death in Europe and in the USA. Currently, there are no available biological markers, which gives clinicians no other alternative than to rely upon clinical diagnosis by exclusion. There is no assay of objective ante mortem biochemical phenomena that relate to the pathophysiology of this disease. The pathophysiology of AD is connected with alterations in neurotransmission, plaque formation, cytoskeletal abnormalities and disturbances of calcium homeostasis. The search for a test, which is non-invasive, simple, cheap and user-friendly, should be directed at accessible body fluids. Only abnormalities replicated in large series across different laboratories fulfilling the criteria for a biological marker are likely to be of relevance in diagnosing AD. To date, only the combination of cerebrospinal fluid t and Ab42 most closely approximate an ideal biomarker of Alzheimer´s disease. A short review on the role of biological markers in AD on the basis of the literature, contemporary knowledge and our own recent findings are presented., D. Řípová, A. Strunecká., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1935. An identity between the determinant and the permanent of Hessenberg-type matrices
- Creator:
- Da Fonseca, Carlos Martins
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- determinant, permanent, Hessenberg matrices;, graphs, and trees
- Language:
- English
- Description:
- In this short note we provide an extension of the notion of Hessenberg matrix and observe an identity between the determinant and the permanent of such matrices. The celebrated identity due to Gibson involving Hessenberg matrices is consequently generalized.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1936. An identity involving Dedekind sums and generalized Kloosterman sums
- Creator:
- Huan, Le, Wang, Jingzhe, and Wang, Tingting
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Dedekind sum, Kloosterman sum, Dirichlet character, analytic method, Gauss sum, and identity
- Language:
- English
- Description:
- The various properties of classical Dedekind sums $S(h, q)$ have been investigated by many authors. For example, Yanni Liu and Wenpeng Zhang: A hybrid mean value related to the Dedekind sums and Kloosterman sums, Acta Mathematica Sinica, 27 (2011), 435–440 studied the hybrid mean value properties involving Dedekind sums and generalized Kloosterman sums $K(m, n, r; q)$. The main purpose of this paper, is using the analytic methods and the properties of character sums, to study the computational problem of one kind of hybrid mean value involving Dedekind sums and generalized Kloosterman sums, and give an interesting identity.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1937. An identity with generalized derivations on Lie ideals, right ideals and Banach algebras
- Creator:
- de Filippis, Vincenzo, Scudo, Giovanni, and Tammam El-Sayiad, Mohammad S.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- prime rings, differential identities, generalized derivations, and Banach algebra
- Language:
- English
- Description:
- Let $R$ be a prime ring of characteristic different from $2$, $U$ the Utumi quotient ring of $R$, $C=Z(U)$ the extended centroid of $R$, $L$ a non-central Lie ideal of $R$, $F$ a non-zero generalized derivation of $R$. Suppose that $[F(u),u]F(u)=0$ for all $u\in L$, then one of the following holds: (1) there exists $\alpha \in C$ such that $F(x)=\alpha x$ for all $x\in R$; (2) $R$ satisfies the standard identity $s_4$ and there exist $a\in U$ and $\alpha \in C$ such that $F(x)=ax+xa+\alpha x$ for all $x\in R$. We also extend the result to the one-sided case. Finally, as an application we obtain some range inclusion results of continuous or spectrally bounded generalized derivations on Banach algebras.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1938. An immunosuppressed rat model for evaluation of anti-Cryptosporidium activity of sinefungin
- Creator:
- Brasseur, P., Favennec, L., Leméteil, D., Roussel, F., and Ballet, J.J.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Cryptosporidium parvum, sinefungin, anti-cryptosporidial drug, rat model, and treatment
- Language:
- English
- Description:
- Cryptosporidium parvum causes life-threatening diarrhoea in immunocompromized, especially AIDS patients and the efficiency of proposed anti-cryptosporidial therapies is limited or doubtful. An immunosuppressed adult rat model of C. parvum infection was developed for screening molecules candidate for curative and preventive activity in human cryptosporidiosis. Among 31 drugs tested, lasalocid (2-10 mg/kg/24 h), and sinefungin (2-10 mg/kg/24 h), exhibited some activity against C. parvum infection. Oral sinefungin therapy resulted in a dose related suppression of oocysts shedding, which correlated with oocyst disappearance from ileum sections and was also efficient in preventing infection. Relapses were observed after discontinuation of curative sinefungin therapy, which suggests that the biliary tract, a major location and parasite reservoir which sustains persisting infection, was not cleared of parasites by the drug. Improved therapeutic procedures with sinefungin (or analogues) will result from current pharmacological studies.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1939. An improved classifier and transliterator of hand-written Palmyrene letters to Latin
- Creator:
- Hamplová, Adéla, Franc, David, and Veselý, Arnošt
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- artificial intelligence, classification, historical alphabets, mobilenet, and computer vision
- Language:
- English
- Description:
- This article presents the problem of improving the classifier of handwritten letters from historical alphabets, using letter classification algorithms and transliterating them to Latin. We apply it on Palmyrene alphabet, which is a complex alphabet with letters, some of which are very similar to each other. We created a mobile application for Palmyrene alphabet that is able to transliterate hand-written letters or letters that are given as photograph images. At first, the core of the application was based on MobileNet, but the classification results were not suitable enough. In this article, we suggest an improved, better performing convolutional neural network architecture for hand-written letter classifier used in our mobile application. Our suggested new convolutional neural network architecture shows an improvement in accuracy from 0.6893 to 0.9821 by 142% for hand-written model in comparison with the original MobileNet. Future plans are to improve the photographic model as well.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1940. An improved E-model using artificial neural network VoIP quality predictor
- Creator:
- AL-Akhras, Mousa, ALMomani, Iman, and Sleit, Azzam
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Voice over IP, artificial neural network, speech quality, E-model, non-intrusive, voiced, unvoiced, perceptual evaluation of speech quality, packet loss, and subjective-free
- Language:
- English
- Description:
- Voice over Internet Protocol (VoIP) networks are an increasingly important field in the world of telecommunication due to many involved advantages and potential revenue. Measuring speech quality in VoIP networks is an important aspect of such networks for legal, commercial and technical reasons. The E-model is a widely used objective approach for measuring the quality as it is applicable to monitoring live-traffic, automatically and non-intrusively. The E-model suffers from several drawbacks. Firstly, it considers the effect of packet loss on the speech quality collectively without looking at the content of the speech signal to check whether the loss occurred in voiced or unvoiced parts of the signal. Secondly, it depends on subjective tests to calibrate its parameters, which makes it applicable to limited conditions corresponding to specific subjective experiments. In this paper, a solution is proposed to overcome these two problems. The proposed solution improves the accuracy of the E-model by differentiating between packet loss during speech and silence periods. It also avoids the need for subjective tests, which makes it extendable to new network conditions. The proposed solution is based on an Artificial Neural Networks (ANN) approach and is compared with the accurate Perceptual Evaluation of Speech Quality (PESQ) model and the original E-model to confirm its accuracy. Several experiments are conducted to test the effectiveness of the proposed solution on two well-known ITU-T speech codecs; namely, G.723.1 and G.729.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public