Attēlu līniju atpazīšana eksperimentālā sistēmā ar paralēlas apstrādes elementiem

Aprakstīts algoritmisks eksperiments, kas veikts ar nolūku pārliecināties, ka ļoti vienkārša, pat primitīva, bet būtiski paralelizēta, redzes datu primārā apstrāde ir pietiekoši spēcīga, lai tiktu detektētas svarīgas attēla ģeometriskās īpašības, proti, līnijas digitālā attēlā. Eksperiments aprobežojas tikai ar pašu līniju konstatējumu, bet pieļaujot principā patvaļīgu un pat mainīgu katras līnijas platumu, liekumu, spožuma intensitāti, attēla spožuma nevienmērību un trokšņus. Līnijas tiek detektētas, paralēlā apstrādē atrodot lokālus līniju elementus. Apstrāde organizēta trijos viens otram sekojošos apstrādes līmeņos, katrā līmenī risinot specifisku matemātisku uzdevumu: - līniju elementu detektēšana – pie dažādiem izmēriem analizē katra pikseļa apkārtni nolūkā noteikt, vai šajā apkārtnē ir saskatāms līnijas elements, - līniju elementu grupēšana – noskaidro, kuri līniju elementu pāri der par speciāla grafa šķautni un atrod uzbūvētā grafa sakarīgās komponentes, - līniju elementu ķēdēšana – atrod speciālā grafa sakarīgo komponenšu raksturīgas ģeometriski sakārtotas apakškopas. Apstrādes līmeņu dati sakārtoti atbilstošos slāņos, un informācija pirmā līmeņa apstrādē tiek ņemta no dotā attēla dažādu izmēru pikseļu apgabaliem, tā nodrošinot dažāda izmēra detaļu detektēšanu. Katra līmeņa apstrādājošos elementus var uzskatīt par pēc vajadzības spēcīgiem procesoriem, kas katra līmeņa ietvaros darbojas maksimāli paralelizēti. Nobeigumā doti eksperimentu rezultāti, imitējot piedāvāto paralēlo apstrādi uz tradicionāla procesora

How to draw combinatorial maps?

In this article we consider the combinatorial map (rendered by permutations) approach to graphs on surfaces and how between both could be establish some terminological uniformity in favor of combinatorial maps in the way rotations were set as fundamental structural elements, and other necessary notions were derived from them. We call this the rotational prevalence with respect to how to build a graph drawing environment. We deal here with simple operations of how to draw combinatorial maps and partial maps. One of our aims would be to advocate a wider use of combinatorial maps in the graph drawing applications. Besides, we advocate to use corners of halfedges where upon permutations act in place of halfedges

Future Needs in Mast Cell Biology.

The pathophysiological roles of mast cells are still not fully understood, over 140 years since their description by Paul Ehrlich in 1878. Initial studies have attempted to identify distinct "subpopulations" of mast cells based on a relatively small number of biochemical characteristics. More recently, "subtypes" of mast cells have been described based on the analysis of transcriptomes of anatomically distinct mouse mast cell populations. Although mast cells can potently alter homeostasis, in certain circumstances, these cells can also contribute to the restoration of homeostasis. Both solid and hematologic tumors are associated with the accumulation of peritumoral and/or intratumoral mast cells, suggesting that these cells can help to promote and/or limit tumorigenesis. We suggest that at least two major subsets of mast cells, MC1 (meaning anti-tumorigenic) and MC2 (meaning pro-tumorigenic), and/or different mast cell mediators derived from otherwise similar cells, could play distinct or even opposite roles in tumorigenesis. Mast cells are also strategically located in the human myocardium, in atherosclerotic plaques, in close proximity to nerves and in the aortic valve. Recent studies have revealed evidence that cardiac mast cells can participate both in physiological and pathological processes in the heart. It seems likely that different subsets of mast cells, like those of cardiac macrophages, can exert distinct, even opposite, effects in different pathophysiological processes in the heart. In this chapter, we have commented on possible future needs of the ongoing efforts to identify the diverse functions of mast cells in health and disease

Childhood Obesity in Primary Care : Not yet General Practice

The prevalence of childhood obesity has at least doubled the last 30 years. Childhood obesity is associated with an increased likelihood to develop adult obesity, which translates into increased risk for chronic diseases, including diabetes mellitus type 2, cardiovascular disease and certain types of cancer. A complex interaction between the environment and risk factors at a personal level causes childhood obesity. Because of this situation, there is not one e$ective prevention or treatment strategy to tackle childhood obesity. It has been suggested that primary care could be a suitable setting to manage childhood obesity since access is easy and children are frequently seen. However, little is known on overweight and obese children in primary care. We wanted to reveal if overweigh

Tra Logudoro e Campidani: i volgari sardi e le espressioni della cultura

Sommario: 1. La comparsa del volgare nell'isola e i principali documenti in sardo antico. - 2. Lingua, cultura e società

Automated contrast painting for position verification in radiotherapy

The influence of information technology in medicine has been constantly rising and represents a central part in many medical disciplines, especially radio-oncology. For the proper delivery of radiation treatment, the correct position of the patient is essential. To verify the correct position of the patient radiological images are made. In order to compare positions, contours of structures (often bones) may be used, these need to be identified and painted. The software that was provided with the linear accelerator contains a bitmap paint program, where these structures are painted manually. This manual painting of structures could be replaced by automated algorithms. However, amendments, innovations or customization of the original software are costly and difficult to achieve due to copyright, license and certification issues. The concept described here aims to get around these issues by creating an automated algorithm on the user level, with no interference of the underlying original software. This system uses the Java platform; with the help of the Java Robot class user input can be simulated. The developed tool proved to be time-saving, functional and the development could easily be accomplished and individually tailored to users needs

Aspetti linguistici e culturali del sincretismo cristiano-pagano nella Sardegna bizantina.

Sin resume

Reconfigurable photoinduced metamaterials in the microwave regime

We investigate optically reconfigurable dielectric metamaterials at gigahertz frequencies. More precisely, we study the microwave response of a subwavelength grating optically imprinted into a semiconductor slab. In the homogenized regime, we analytically evaluate the ordinary and extraordinary component of the effective permittivity tensor by taking into account the photo-carrier dynamics described by the ambipolar diffusion equation. We analyze the impact of semiconductor parameters on the gigahertz metamaterial response which turns out to be highly reconfigurable by varying the photogenerated grating and which can show a marked anisotropic behavior.Comment: 6 figures, 7 page

Transiciones en la posesión del balón en fútbol: de lo posible a lo probable

En este estudio hemos seleccionado una estructura de diseño que incorpora diferentes partidos de distintos equipos que jugaron el último Mundial de Fútbol, a través de un sistema de categorías aplicable a cada uno de los equipos observados exclusivamente en su acción de juego (posesión de balón, no posesión del balón y balón parado). A partir de un estudio de generalizabilidad se ha confirmado que la muestra seleccionada es representativa del conjunto de los partidos del mundial. Se ha utilizado una aplicación informática específica para la observación, codificación y registro de los eventos deportivos, Match Vision Studio (Perea, Alday y Castellano, 2006). La codificación de los partidos nos ha permitido conocer las secuencias de posesiones-no posesiones de balón que durante cada jugada o ‘balón en juego’ desarrollan los equipos durante la competición. Los resultados muestran que el porcentaje de balones en juego con una única posesión o no posesión del balón ha aumentado considerablemente en los últimos años