241 research outputs found
Academic quality measurement: A multivariate approach
No full textThis paper applies a new quality measurement methodology to measure the quality of the postgraduate courses. The methodology we propose is the Academic Quality Measurement (AQM). The model is applied to several simulated data sets where we know the true value of the parameters of the model. A nonparametric model, based in Nearest Neighbours combined with Restricted Least Squared methods, is developed in which students evaluate the overall academic programme quality and a set of dimensions or attributes that determine this quality. The database comes from a Spanish Public University post graduate programme. Among the most important conclusion we say the methodology presented in this work has the following advantages: Knowledge of the attribute weights allow the ordering of the attributes according to their relative importance to the student, showing the key factors for improving quality. Student weights can be related to student characteristics to make market segmentation directly linked to quality objectives. The relative strengths and weaknesses of the service (high educations) can be determined by comparing the mean value of the attributes of the service to the values of other companies (Benchmark process or SWOT analysis).Quality Measurement, Postgraduate Programme, Nonparametric Model.
Matrix LED illuminator for photodynamic therapy
No full textA prototype of the illuminator for photodynamic therapy with the use of Hyperflav photosensitizer is proposed. This device has no analogues in Ukraine, its expected technical characteristics are inferior to no foreign models of similar purpose and can be easily adapted to any other type of photosensitizer. A complex solution has been found for the problem of ensuring the necessary level of photodynamic dose and control of large arrays of LEDs in the prototype of the integrated illuminator
Matrix LED illuminator for photodynamic therapy
No full textA prototype of the illuminator for photodynamic therapy with the use of Hyperflav photosensitizer is proposed. This device has no analogues in Ukraine, its expected technical characteristics are inferior to no foreign models of similar purpose and can be easily adapted to any other type of photosensitizer. A complex solution has been found for the problem of ensuring the necessary level of photodynamic dose and control of large arrays of LEDs in the prototype of the integrated illuminator
Information and measuring system for control of reflector profiles of large antennas
No full textВ даній роботі розглянуто відомі сучасні методи вимірювання форми
дзеркала антенних систем, проведено аналіз існуючих рішень у вигляді
пристроїв для отримання карти поверхні рефлектора. Було досліджено
багато запропонованих різних методів для вимірювання поверхні
рефлектора. Були виконано рад таких задач як, дослідження похибок
лазерних далекомірів, лазерне сканування дзеркала антени і оформлення
результатів, моделювання поверхні профілю антени у Matlab.In the given work the known modern methods of measurement of forms of
the mirror antenna system are considered, the analysis of the existing decisions
in a window of devices for reception of a card over a reflector is carried out.
Many proposed different methods for measuring the surface of the reflector
have been investigated. A number of tasks were performed, such as research of
laser rangefinder errors, laser scanning of the antenna mirror and registration
of results, modeling of the external profile of antennas in Matlab.СКОРОЧЕННЯ ТА УМОВНІ ПОЗНАКИ ...4
ВСТУП ...5
1 Аналітична ...7
1.1Аналіз існуючих пристроїв ...7
1.2 Лазерний трекер FARO Laser Tracker ION ...8
1.3 Лазерний трекер LTD800...10
1.4 Лазерний радар MV260...11
2 Основна частина ...13
2.1 Огляд існуючих методів контролю профілю дзеркальних антен ...13
2.2 Оптичний метод контролю поверхні ...14
2.2.1 Оптично-механічна система для дослідження форми дзеркала
антени ...14
2.3 Загальні принципи побудови оптичних систем...22
2.4 Лазерний далекомір ...23
2.5 Методи на основі ультразвукової ехолокації...27
2.6 Голографічний метод...30
3 Науково-дослідницька частина...33
3.1 Похибки лазерних далекомірів ...33
3.1.1 Випадкові похибки...33
3.1.2 Систематичні похибки...38
3.1.3 Відхилення часового кроку ...38
3.1.4 «Змішування пікселів»... 39
3.2 Графічне оформлення результатів отриманих при вимірюванні
лазерним сканером...40
3.3 Сканування поверхні рефлектора РТ-32 за допомогою тахеометра
Topcon IS-301...45
3.4 Опрацювання у програмі Image Master for IS ...50
3.5 Методика контролю поверхні рефлектора в робочому режимі з
використанням електронного тахеометра ...51
4. Охорона праці ...54
4.1 Державний пожежний нагляд...54
4.2 Пожежна профілактика при проектуванні і експлуатації
промислових об’єктів ...55
ВИСНОВОКИ...57
ПЕРЕЛІК ДЖЕРЕЛ ПОСИЛАННЯ ...58
ДОДАТОК А...6
Recent results on pp-chain solar neutrinos with the Borexino detector
No full textMeasuring all neutrino components is the most direct way to test thestandard solar model (SSM). Despite the great results obtained so far,important questions such as the solar metallicity remain open. A precisemeasurement of the solar pp chain and the CNO cycle would settle thiscontroversy between high (HZ) and low (LZ) metallicity compositions ofthe Sun. Solar neutrinos allow the determination of oscillation parameters,in particular the θ 12 mixing angle and, to a lesser degree the ∆m 212 masssplitting. Furthermore the measurement of the electron neutrino survivalprobability Pee as a function of neutrino energy allows one to directlyprobe the MSW-LMA mechanism of neutrino oscillations In this work Iwill report the first simultaneous precision spectroscopic measurement ofthe complete pp-chain and its implications for both solar and neutrinophysics with the Borexino detector
Análisis de microarrays, preproceso
No full textComo consecuencia del éxito de la tecnología de microarrays, aparecen en la literatura un gran número de experimentos realizados con los mismos. Sin embargo, los problemas de estandarización y las numerosas fuentes de variabilidad hacen necesarias técnicas de validación a posteriori. Por este motivo se ha tratado de estudiar cómo influye en la selección de genes diferencialmente expresados algunas de las principales técnicas de preproceso. Muchos de los estudios realizados para comparar estas técnicas, se han llevado a cabo sobre experimentos cuyos resultados óptimos se conocen a priori con el fin de intentar determinar cuál presenta mayor precisión. En nuestro caso no conocemos el resultado correcto a priori y lo que se ha realizado es un análisis comparativo de los resultados obtenidos en cada caso con el fin de poder predecir el comportamiento a priori de cada una de las técnicas analizadas en función de diversos factores como distribución de los datos iniciales, patrones de expresión objeto de interés, presencia de outliers, etc.
Se han aplicado tres técnicas de preproceso sobre un experimento de microarrays. Las técnicas aplicadas son GCRMA, MBEI y MAS5. Se han encontrado en nuestros datos principalmente tres patrones de expresión en aquellos genes diferencialmente expresados y se ha demostrado estadísticamente que existe una asociación entre la técnica de preproceso utilizada y el patrón predominante en la misma. Esta tendencia se ha relacionado con la eficiencia en la detección de valores atípicos y con la magnitud de cambio detectada con cada una de ellas. Por el momento, no se ha podido establecer un estadístico significativo a la hora de confirmar la concordancia entre los tres métodos tras la selección de genes diferencialmente expresados.Following the success of microarray technology, in the literature there is a large number of experiments made with them. However, the problems of standardization and the many sources of variability make it necessary posteriori validation techniques. For this reason, we have tried to study how the selection of genes influence some key preprocessing techniques. Many of the studies conducted to compare these techniques have been carried out on experiments which optimal results are known a priori to try to determine which has greater accuracy. In our case, we do not know the correct result a priori and what has been accomplished is a comparative analysis of the results obtained in each case in order to predict a priori the behavior of each of the techniques discussed in terms of various factors as initial data distribution, expression patterns object of interest, the presence of outliers, and so on.
Three techniques have been applied on the preprocessing on a microarray experiment. The techniques are GCRMA, MAS5 and MBEI. In our data there have been found mainly three patterns of expression in those genes expressed and have been shown statistically that there is an association between the pre-processing technique used and the predominant pattern in it. This trend is related to efficiency in the detection of outliers and the magnitude of change detected with each of them. So far, it has not been able to establish a statistically significant in confirming the agreement between the three methods after the selection of differentially expressed genes
Step by step, building a virtual exchange program between five european universities
No full textIt is commonly claimed that the Exchange program ERASMUS (European Action Scheme for the Mobility of University Students) can be regarded as one of the biggest successes of the European Union (EU) educational policy in the past years. Since its launching in 1987, more than 3,000,000 students and teachers have participated in their programmes. However, the majority of the participants have been undergraduate students, being the presence of postgraduate students merely testimonial (something that the Bologna Process aims at changing). One of the main reason for this phenomenon may be that, as more mature people, postgraduate students might have more restrictive family, professional and/or work ties. With this motivation in mind, we proposed the EU our VRTUOSI project, www.vrtuosi.org, within the Virtual Campus methodological framework of the EU Lifelong Learning Programme (LLP). Ours was one of the five proposals chosen by the EU in the 2009 announcement. On the other hand, quality is an important issue within the European educational framework, as only outstanding programs will benefit from European and national funds and will call attention of a larger number of students, ensuring their survival in a very competitive environment. In this regard, we provide details of the design, development and implementation of a Six-Sigma-based methodology to assess the quality in our Master degrees. This quality management system was first implemented in our Decision Systems Engineering Master (DSEM). In this work, we provide a detailed description of the VRTUOSI program, putting special emphasis on its more paradigmatic issues, which might be of interest to other Higher Educational Institutions planning to implement similar programmes. We describe here the organization and implementation of VRTUOSI, a pioneer virtual exchange program between five European universities, we present our six sigma based methodology designed and developed to improve quality in it. We describe its structure and implementation through the web and its application to improve the European e-learning program and the online Master in Decision Systems Engineering. We describe its positive effects on internationalization of our online Masters
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