336 research outputs found
Thermodynamic analysis and analytical simulation of the Rallis modified Stirling cycle
No full textA Stirling cycle was developed by Rallis considering the adiabatic behaviour instead of isothermal behaviour of working fluid inside the expansion/compression volume, since the isothermal processes are very difficult to be realised in actual practice due to irreversibilities. In order to increase the performance of Rallis Stirling cycle engine, two modified versions of Rallis Stirling cycle engine model have been proposed and developed, called as Rallis modified Stirling cycle engine (RMSE). In this paper, the
thermodynamic analysis of the developed models have been carried out and the simulated results are compared with the Rallis ideal model of Stirling cycle engine, as this model describes more accurately the thermodynamic cycle of practical Stirling machines. The results reveal the fact that the thermal efficiency of RMSE I model is enhanced by 38.06% and that of RMSE II model by 48.42%, whereas the power output is increased by 58.05% and 78.19% in case of RMSE I and RMSE II model respectively, when compared with the Rallis ideal adiabatic model of Stirling engine
Guest Helen Mongan-Rallis: It's More Than That
No full textRuntime 1:11:32Helen Mongan-Rallis, an associate professor in the Department of Education, was born in a country deeply steeped in racial turmoil. "I left South Africa in 1984, but I am deeply South African." How these roots influence her work at UMD, and how stories empower Mongan-Rallis to better understand people she disagrees with. Plus getting trapped in Lake Superior ice while kayaking, and headstands as a metaphor for being an ally on this episode of “It’s More Than That.” Enjoy and be sure to hit subscribe for more stories that celebrate the human experience in higher education.Pedersen, Paula; Lieberman, Hannah. (2020). Guest Helen Mongan-Rallis: It's More Than That. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/217240
On Some <i>q</i>-Analogs of a Theorem of Kostant-Rallis
No full textAbstractIn the first part of this paper generalizationsof Hesselink’s q-analog of Kostant’smultiplicity formula for the action of a semisimple Lie group on the polynomials on its Lie algebra are given in the context of the Kostant-Rallis theorem. They correspond to the cases of real semisimple Lie groups with one conjugacy class of Cartan subgroup. In the second part of the paper a q-analog of the Kostant-Rallis theorem is given for the real group SL(4, ) (that is SO(4) acting on symmetric 4 × 4 matrices). This example plays two roles. First it contrasts with the examples of the first part. Second it has implications to the study of entanglement of mixed 2 qubit states in quantum computation.</jats:p
Poles of the Standard -function of and the Rallis–Schiffmann Lift
No full textAbstractWe characterize the cuspidal representations ofwhose standard-function admits a pole atas the image of the Rallis–Schiffmann lift for the commuting pair (,) in. The image consists of non-tempered representations. The main tool is the recent construction, by the second author, of a family of Rankin–Selberg integrals representing the standard-function.</jats:p
Using Earth Observation Application to Air Quality in Addition to in-situ monitoring: HARMONIA IRAP platform
No full textThe effect of air quality (AQ) on public health after the COVID-19 pandemic attracted more attention although this undeniable link was studied before. Such diseases caused or accelerated by the air pollution levels has a long list including respiratory, cardiovascular, and lung disease. There are different associations between air pollution and the diseases i.e., long-term, short-term exposure and finally higher levels of air pollution. To improve a healthy environment in urban areas, increasing AQ is a must and in-situ monitoring is one method to track it. To combine in-situ monitored data and earth observation (EO) data could provide an efficient way to collect data in different temporal resolution, analyze, detect any existing anomalies, eventually provide a model for possible scenarios through climate change. This paper will discuss the benefits and challenges lie under the combination of in-situ and EO data in this framework. It will present the suggested integrated resilience assessment platform (IRAP) that is under development in the HARMONIA project (in respond to the topic LC-CLA-19-2020 and its added value on this field. The IRAP platform will eventually utilize the GEOSS datasets, along with other data collections, and adopt proper Deep Learning techniques in an effort to build robust, comprehensive data cube objects, which are considered to be the state-of-the-art solution to store and organize EO data. Information extracted from the datacubes will be visualized in the integrated graphical user interface of the platform in order to inform municipalities and citizens for potential climate change related risks and vulnerabilities
Proof of a conjecture of Kudla and Rallis on quotients of degenerate principal series
No full textIn this paper we prove a conjecture of Kudla and Rallis. Let be a
unitary character, and a symplectic vector space over a
non-archimedean field with symmetry group . Denote by the
degenerate principal series representation of . Pulling back
along the natural embedding gives a representation of .
Let be an irreducible smooth complex representation of . We then
prove We also give analogous
statements for orthogonal or unitary. This gives in particular a new proof
of the conservation relation of the local Theta correspondence for
symplectic-orthogonal and unitary dual pairs.Comment: Small corrections being necessitated from a wrong statement in
Section
HARMONIA: strategy of an integrated resilience assessment platform (IRAP) with available tools and geospatial services
No full textThe huge amount of the available data nowadays has raised some major challenges which are related to the storage, fusion, structure, streaming and processing of these data. In this paper, we present the development of a holistic framework, entitled HARMONIA, that encompasses State-of-The-Art solutions for the emerging issues related to Climate Change, natural and/or man-made hazards and urban/peri-urban risks. The Horizon 2020 HARMONIA project is developing an Integrated Resilience Assessment Platform (IRAP) which plans to provide targeted services for different groups of end-users. In particular, it will actively support urban decision-makers in strategic decisions and planning and citizens in facing daily effects and risks of Climate Change. Additionally, the platform will be a place to interconnect cities which end up facing similar Climate Change effects. HARMONIA IRAP leverages cuttingedge technologies (i.e., explainable Artificial Intelligence, Data Mining, multi-criteria analysis, dynamic programming) and services (ie., Virtual Machines, Containers) in order to provide solutions considering the complexity and diversity of extreme earth and non-earth data. In addition, this platform includes a Decision Support System providing early-warning feedback and recommendations to the end-users. In this way the HARMONIA IRAP design tends to address these challenges by offering the corresponding dynamic, scalable and robust mechanisms with the aim to provide useful integrated tools for the related users. Datacubes architecture, which is a major part of the IRAP, offers the opportunity to investigate more sophisticated correlations among the data and provide a more tangible representation of the extracted information
Canine parvoviral enteritis: an update on the clinical diagnosis, treatment, and prevention
No full textMathios E Mylonakis, Iris Kalli, Timoleon S Rallis Companion Animal Clinic, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece Abstract: Canine parvovirus type 2 is the cause of a highly contagious acute enteritis associated with high morbidity and mortality, with very low survival rates in untreated dogs. Although severe clinical disease typically occurs in dogs younger than 6 months of age, adults with insufficient immunity may potentially be affected. In this article, the current state of knowledge is reviewed regarding the diagnostic aspects of parvoviral enteritis, with special emphasis placed on the clinical relevance of the detection of viral antigens in the feces, detection of viral antibodies in the serum, or the polymerase chain reaction-based amplification of the viral DNA in the feces. In addition, the components of the supportive and symptomatic treatment aiming to optimize the outcome of the disease in the clinical setting are thoroughly reviewed. Immunization guidelines for the prevention of the disease are also updated. Keywords: dog, parvovirus type 2, acute enteritis, treatment, vaccinatio
Intra-abdominal Aspergillosis due to Aspergillus fumigatus in a Dog
No full textA 3 year-old, spayed female, mixed-breed dog presented with abdominal distension due to a large mass, detected during abdominal palpation and confirmed by abdominal imaging. Cytological examination of the mass was suggestive of pyogranulomatous inflammation. During exploratory laparotomy, extensive peritoneal adhesions and multifocal nodular lesions on the liver, spleen and omentum were revealed. One week later, the dog deteriorated and was euthanized. Numerous firm masses were observed in the liver, spleen, left kidney, stomach, small and large intestine during necropsy. The lungs, heart, and ocular structures were macroscopically normal. Histopathology results (surgery and necropsy) revealed fungal hyphae enclosed in the pyogranulomatous lesions. Polymerase chain reaction (PCR) products showed 100% homology with Aspergillus fumigatus and agar gel double diffusion was positive for IgG antibodies against the same fungus. © 2018 L Kalogianni, N Soubasis, M Saridomichelakis, I Vlemmas, A Velegraki, L Papazoglou, M Kritsepikonstantinou, T Rallis
First Occurrence for the Dual Pairs (<i>U</i>(<i>p, q</i>), <i>U</i>(<i>r, s</i>))
No full textAbstractWe prove a conjecture of Kudla and Rallis about the first occurrence in the theta correspondence, for dual pairs of the form (U(p, q), U(r, s)) and most representations.</jats:p
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