19,751 research outputs found
q-Differential equations for q-classical polynomials and q-Jacobi-Stirling numbers
No full textWe introduce, characterise and provide a combinatorial interpretation for the so-called q-Jacobi–Stirling numbers.
This study is motivated by their key role in the (reciprocal) expansion of any power of a second order
q-differential operator having the q-classical polynomials as eigenfunctions in terms of other even order operators,
which we explicitly construct in this work. The results here obtained can be viewed as the q-version of
those given by Everitt et al. and by the first author, whilst the combinatorics of this new set of numbers is a
q-version of the Jacobi–Stirling numbers given by Gelineau and the second author
Quantum codes from codes over the ring F-q + alpha F-q
No full textIn this paper, we aim to obtain quantum error correcting codes from codes over a non-local ring R-q = F-q + alpha F-q. We first define a Gray map phi from R-q(n) to F-q(2n) preserving the Hermitian orthogonality in R-q(n) to both the Euclidean and trace-symplectic orthogonality in F-q(2n). We characterize the structure of cyclic codes and their duals over R-q and derive the condition of existence for cyclic codes containing their duals over R-q. By making use of the Gray map phi, we obtain two classes of q-ary quantum codes. We also determine the structure of additive cyclic codes over R-p2 and give a condition for these codes to be self-orthogonal with respect to Hermitian inner product. By defining and making use of a new map delta, we construct a family of p-ary quantum codes
Recommended from our members
Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Network Q
No full textA press release from Network Q announcing that they will begin featuring Brian McNaught, a gay columnist and author, for a monthly segment
Tobin's Q and Financial Policy
No full textRecent research in macroeconomics has emphasized the importance of linking the financial and real sectors and the need for working with optimizing models. Tobin’s Q model of investment would appear to provide a framework that can satisfy these two criteria. In contrast to the original presentation of the Q model, the formal development has not recognized that the firm actively participates in a number of financial markets; in this broader context, we show that Q is likely to be an uninformative and possibly misleading signal for investment expenditures . We then endeavor to turn this negative theoretical result to positive advantage in resolving a number of empirical problems with Q models, but the modifications dictated by the theory receive little support from the data.
Trichomonas vaginalis tanısında mikroskopi, kültür ve PCR yöntemlerinin karşılaştırılması
No full textAmaç: Trikomonosiosis, seksüel geçişli enfeksiyona sebep olan Trichomonas vaginalis nedenlidir. T.vaginalis, dünyada 180 milyon insanı etkilemektedir ve anlamlı morbidite sebebidir. T.vajinalis enfeksiyonu kadınlarda vajinit, ekzoservisit ve üretrit nedenidir. Bu çalışmanın amacı, üç değişik yöntem sonuçlarını karşılaştırarak T. vajinalis varlığını tespit etmektir. Gereç ve Yöntem: Mustafa Kemal Üniversitesi Tıp Fakültesi Jinekoloji polikliniğine ve Doğumevi hastanesine başvuran toplam 200 hastadan alınan swap örnekleri toplandı. : Mustafa Kemal Üniversitesi Tıp Fakültesi Parazitoloji bölümünde T. vajinalis genotip ve fenotipileri değerlendirildi. T. vaginalis tespiti açısından ve hasta tedavisine etkisi açısından bu çalışma bölgemizde yapılmış ilk moleküler çalışmadır. Bulgular: 200 hastanın 56 sı pozitif olarak bulundu ve bunların 24'ü (%42.8) mikroskopik olarak, 18'i (%32,1) kültür ile, 24'ü (%42,8) PCR ile tespit edildi. Tüm metodlarla tespit edilen hasta sayısı 14 idi. Bu çalışmada, Cochran's Q testi ile elde edilen üç metod karşılaştırılması anlamlı idi.(p=0.022). McNemar yöntemi ile tüm yöntemler ikili olarak karşılaştırıldığında mikroskopi ile kültür arasında (p=0.5),mikroskopi ile PCR arasında (p=0.063), kültür ve PCR arsında (p=0.25) fark bulunamadı. Tartışma: Kültür metodu rutinde kulanılan bir metod değildir ve kontaminasyon riski vardır. PCR metodu direkt olarak parazit DNA'sını göstermektedir ve diğer yöntemlere göre daha güvenilir bir yöntemdir.Aim: Trichomoniasis, a sexually transmitted infection (STI) caused by Trichomonas vaginalis, affects 180 million people worldwide and causes significant morbidity. Infection with T. vaginalis has been associated with vaginitis, exocervicitis, and urethritis in women. Material and Method: In this study, we aim to investigate the presence of T. vaginalis by using three different methods for comparing the results. Two hundred T. vaginalis isolates taken from swap samples were collected in Medical Faculty, Department of Gynecology, Mustafa Kemal University Polyclinic, and examined genotypically and phenotypically to identify T. vaginalis in Parasitology Department. This research is unique in terms of its contribution to patient treatment, being the first molecular study in Turkey/Hatay to determine Trichomonas (TV) genes stemming from Trichomonas vaginalis strains. Result: 56 out of 200 patients examined were identified as positive and 24 (42.8%) of these were identified through microscopy, 18 (32,1%) with culture and 24 (42,8%) with PCR. The number of those identified through all these methods is 14 (25%). In this study, difference was calculated using three methods (p=0.022) with Cochran's Q test. When compared with McNemar two by two, no superiority in T. vaginalis diagnosis was found between microscopy and culture (p=0.5), microscopy and PCR (p=0.063), or culture and PCR (p=0.25) methods. Discussion: Culture method is not used in routine laboratory procedures and has contamination risk. PCR method shows directly the parasite of DNAs, and so it is thought to be more reliable compared to the other two methods
A Q-learning based multi-strategy integrated artificial bee colony algorithm with application in unmanned vehicle path planning
No full textArtificial bee colony (ABC) is a prominent algorithm that offers great exploration capabilities among various meta-heuristic algorithms. However, its monotonous and one-dimensional search strategy limits its searching performance in the solving process. Thus, to address this issue, a Q-learning based multi-strategy integrated ABC algorithm (QMABC) is proposed. In the QMABC, multiple search strategies are proposed to utilize different individual experiences and search approaches for solution updates. Then, Q-learning is employed for strategy selection. In comparison to previous studies, this paper introduces more effective state and action configurations within the framework of Q-learning. To evaluate the performance of the QMABC, CEC 2017 benchmark functions are adopted to compare it to different meta-heuristic algorithms including ABC based and non-ABC based algorithms. Moreover, applications in path planning are implemented to further verify the effectiveness of the QMABC. Overall, it should be highlighted that the proposed QMABC demonstrates superiority in both numerical and practical experiments.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Discrete Mathematics and Optimizatio
Investigation of seroprevalences of Q fever, brucellosis and toxoplasmosis in risk groups in Hatay
No full textAmaç: Bu çalışma, Hatay ilinde zoonotik enfeksiyonlar için risk grubunu oluşturan veteriner hekimler, veteriner fakültesi öğrencileri ve mezbaha çalışanlarında Q ateşi, Bruselloz ve Toksoplazmoz'un seroprevalansım belirlemek amacıyla yapılmıştır. Yöntem: 21'i veteriner hekim, 43'ü veteriner fakültesi öğrencisi ve 43'ü mezbaha işçisinden olmak üzere alınan 107 serum örneği Q ateşi için indirekt floresan antikor testi (IFAT), bruselloz için mikro aglütinasyon testi (MAT) ve toksoplazmoz için Sabin Feldman dye testi (SFDT) ile incelenmiştir. Bulgular: 43 mezbaha işçisinden 10'u (% 23.3), 21 veteriner hekim'in altısı (% 28.6) ve 43 veteriner fakültesi öğrencisinin altısında (%14) C. burnetii lgG antikorları yönünden seropozitif bulunurken, sadece bir mezbaha işçisinde C. burnetii IgM antikoru saptanmıştır. Brucella MAT ile 25 (%23.4) serum örneğinde 1:10-1:160 arasında değişen titrelerde Brucella antikorları tespit edilmiştir. Akut enfeksiyon tanı kriteri olarak kabul edilen 1:160 titre sadece bir mezbaha işçisinde saptanmıştır. Toxoplasma gondii antikorları yönünden mezbaha işçilerinin % 53.5'i, veteriner hekimlerin %42.9'u ve veteriner fakültesi öğrencilerinin ise % 20.9'u seropozitif olarak bulunmuştur. Sonuç: Hatay İli'nde risk gruplarında Q ateşi ve Toksoplazmoz seroprevalansı yüksek olarak saptanmıştır. Bu nedenle, risk grubunu oluşturan meslek çalışanlarının zoonotik enfeksiyonlar yönünden bilinçlendirilmesi ve bölgede bu enfeksiyonların epidemiyolojik özelliklerinin aydınlatılması için daha ileri araştırmaların yapılması gerektiği sonucuna varılmıştır.Objective: This study was carried out to determine seroprevalence of Q fever, Brucellosis and Toxoplasmosis among veterinarians, veterinary students and slaughterhouse workers who are in close contact with animals. Method: A total of 107 sera consisting of 21 veterinarians, 43 veterinary students and 43 slaughterhouse workers were tested for Qfever by Indirect Fluorescence Antibody Test (IFAT), for Brucellosis by Micro Agglutination Test (MAT), for Toxoplasmosis by Sabin Feldman dye test {SFDT). Results: Ten (23.3%) of 43 slaughterhouse workers, 6 (28.6%) of 21 veterinarians, and 6 (14%) of veterinary students were positive for the presence of C. burnetii IgG antibodies. However, only one slaughterhouse worker was seropositive for C. burnetii IgM antibody. Although Brucella antibodies ranging from 1:10 to 1:160 in risk groups were observed in 25 (23.4%) serum samples, an antibody titer of 1:160, which is considered seropositivity criterion for acute Brucellosis, was determined in only one serum sample belong to slaughterhouse workers. SFDT results showed that 53.5 % of slaughterhouse workers, 42.9% of veterinarians and 20.9% of veterinary medicine students were positive. Conclusion: The high seroprevalence of Qfever and Toxoplasmosis obtained in this study suggests that people, especially those who are close contact with animals, should be warned and informed about zoonotic infections. In addition, further studies should be performed to elucidate epidemiology of mentioned zoonotic infections in this region
Event-Based Communication in Distributed Q-Learning
No full textWe present an approach to reduce the communication of information needed on a Distributed Q-Learning system inspired by Event Triggered Control (ETC) techniques. We consider a baseline scenario of a Distributed Q-Learning problem on a Markov Decision Process (MDP). Following an event-based approach, N agents sharing a value function explore the MDP and compute a trajectory-dependent triggering signal which they use distributedly to decide when to communicate information to a central learner in charge of computing updates on the action-value function. These decision functions form an Event Based distributed Q learning system (EBd-Q), and we derive convergence guarantees resulting from the reduction of communication. We then apply the proposed algorithm to a cooperative path planning problem, and show how the agents are able to learn optimal trajectories communicating a fraction of the information. Additionally, we discuss what effects (desired and undesired) these event-based approaches have on the learning processes studied, and how they can be applied to more complex multi-agent systems.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Team Manuel Mazo J
- …
