Suchergebnisse

Honey is the natural sweet substance produced by Apis mellifera bees and is studied in different countries and zones because of the interest of consumers in origin and quality of food. The Corrientes Province (Argentina) produces and exports honey from different rural zones; therefore, the aim of this paper was to study the physico-chemical parameters of honeys using multivariate methods in order to classify honeys according to the geographical origin. Nine standard physico-chemical parameters were determined according to the international legislation. The results obtained were in agreement with international regulations. Then, the results obtained were analyzed by principal component analysis and linear discriminant analysis applying forward selection. The chemometric analysis allowed grouping samples according to their geographical origin by using only five parameters.

Tahun 2019 Indonesia melaksanakan tahun politik, banyak terjadi peristiwa politik yang membuat masyarakat Indonesia menyikapi dengan berbagai macam tanggapan dari berbagai banyak tanggapan tersebut beberapa dituliskan dalam media sosial Twitter dan data tersebut dapat diolah untuk menggambarkan bagaimana pendapat masyarakat akan suatu kejadian politik. Penelitian ini bertujuan untuk mendapatkan analisis dari implementasi algoritma LDA untuk menentukan topik politik pada Twitter. Metode yang digunakan adalah dengan algoritma LDA yang digunakan untuk menghitung kemungkinan topik yang ada untuk setiap tweet-nya, LDA merupakan model probabilistik yang dapat menggambarkan topik tanpa perlu melakukan proses klasifikasi sebelumnya, sistem akan otomatis mendeteksi topik-topik yang ada. Hasil penelitian dengan pengujian 3 kali dengan jumlah data masing-masing 100, 1000 dan 6000 dengan menggunakan setingan LDA bawaan dari library Genism dan jumlah topik 10 menghasilkan rata-rata nilai kebenaran 90%. Sehingga dapat disimpulkan bahwa LDA dapat digunakan dan memiliki nilai kebenaran yang tinggi dalam mendeteksi topik politik pada Twitter.

The Lobbying Disclosure Act of 1995 (LDA) requires lobbyists to file quarterly lobbying disclosure reports and semiannual reports on certain political contributions. The LDA also requires that GAO annually audit the extent to which lobbyists can demonstrate compliance with disclosure requirements; identify challenges to compliance that lobbyists report; and describe the resources and authorities available to the Office in its role in enforcing LDA compliance and the efforts the Office has made to improve enforcement. This book discusses the 2013 lobbying disclosure; registration and disclosure

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a legislative requirement, GAO reviewed the reporting of lobbying activities by organizations that have employees who lobby on the organizations' behalf and have the option to report their lobbying expenses under the Lobbying Disclosure Act (LDA) of 1995 or applicable Internal Revenue Code (IRC) provisions that they use for tax purposes, focusing on: (1) the differences between the LDA and IRC section 4911 and 162(e) definitions of lobbying; (2) the impact that differences in the definitions may have on registration and reporting under LDA, including information on the number of organizations using each definition and the expenses they have reported; and (3) identifying and analyzing options, including harmonizing the three definitions, that may better ensure that the public disclosure purposes of LDA are realized."

In order to help journalists investigate inside large audiovisual archives, as maintained by news broadcast agencies, the multimedia data must be indexed by text-based search engies. By automatically creating a transcript through automatic speech recognition (ASR), the spoken word becomes accessible to text search, and queries for keywords are made possible. But stil, important contextual information like the identity of the speaker is not captured. Especially when gathering original footage in the political domain, the identity of the speaker can be the most important query constraint, although this name may not be prominent in the words spoken. It is thus desireable to have this information provided explicitely to the search engine. To provide this information, the archive must be an alyzed by automatic Speaker Identification (SID). While this research topic has seen substantial gains in accuracy and robustness over last years, it has not yet established itself as a helpful, large-scale tool outside the research community. This thesis sets out to establish a workflow to provide automatic speaker identification. Its application is to help journalists searching on speeches given in the German parliament (Bundestag). This is a contribution to the News-Stream 3.0 project, a BMBF funded research project that addresses accessibility of various data sources for journalists.

La utilización práctica del efecto Doppler en la emisión láser fue propuesta desde los inicios del desarrollo de los láseres en los años sesenta. Sólo en los años ochenta la investigación realizada pudo salir del laboratorio y dar lugar a la fabricación de aparatos de medida de velocidad comerciales. A partir de los noventa estos aparatos se popularizaron rápidamente. Actualmente se utilizan medidores de velocidad láser por efecto Doppler en múltiples aplicaciones, entre las que sobresale la medida de velocidad de fluidos, para estudios aéreo e hidrodinámicos. Sus características únicas, como la precisión obtenida en la medida, su alta resolución espacial y el carácter no intrusivo, sólo han comenzado recientemente a tener rivales de consideración, como pueden ser la velocimetría de imagen de partículas (PIV). También la medida de velocidades de móviles sólidos comienza a resultar, con el abaratamiento general de los componentes opto-electrónicos, un objetivo para muchas empresas. Entre las aplicaciones de este tipo se contemplan el control de velocidad de los vehículos en carretera y el control de procesos industriales del ramo textil, papelero y de empresas fabricantes de cables, entre otros. Empresas europeas y americanas, como Dantec Electronik y TSI, por citar las más representativas, comercializan aparatos LDA de propósito general de altas prestaciones. Hasta la fecha estos sistemas sólo podían ser adquiridos por importantes centros de investigación o grandes empresas, debido a su elevado coste. El futuro comercial de la velocimetría láser Doppler exige la fabricación de aparatos más económicos y adaptados a las necesidades del cliente. Muchos de los sistemas actuales son voluminosos, difíciles de manejar y con potencias de trabajo elevadas. Se está llevando a cabo un importante trabajo para conseguir reducir el tamaño y coste de los equipos sin perder sus principales prestaciones. Asimismo la alta velocidad y capacidad de cálculo de los ordenadores personales actuales debe hacer innecesaria la inclusión de procesadores específicos para estos equipos. Presentamos el diseño y construcción de un sistema integral de medida de dos componentes de la velocidad, sistema 2D-LDA, para aplicaciones industriales e hidrodinámicas de baja potencia. Siguiendo la filosofía delineada arriba, el diseño de nuestro sistema LDA fue realizado utilizando únicamente una fuente laser y un módulo detector. Los sistemas LDA de medida de dos componentes de velocidad comercialmente disponibles, por el contrario, emplean dos longitudes de onda óptica y dos fotodetectores independientes. Las emisiones azul y verde típicas de los láseres de ion-Ar son las longitudes de onda a menudo elegidas en este tipo de medidas. Por otra parte, se ha empleado los dos canales de entrada de una tarjeta de adquisición de uso general para realizar el disparo multinivel. Esta configuración permite trabajar en cada momento con la parte de señal burst teóricamente más adecuada, con mayor valor de relación señal a ruido. Este trabajo ha sido financiado por la CICYT Proyecto PETRI 95-0249-OP: REALIZACIÓN DE SISTEMAS LÁSER PORTÁTILES DE MEDIDA DE VELOCIDAD POR EFECTO DOPPLER (LDA-LDV) DE BAJO COSTE PARA APLICACIONES INDUSTRIALES E HIDRODINÁMICAS. ; The practical use of the Doppler effect at optical wavelengths was proposed at the early beginning of the development of the laser, in the sixties. However, it was only in the eighties when the results of the experimental work could finally get out of the laboratories, and the first Laser Velocimeters were commercially available. In the nineties this kind of systems became rapidly popular. Nowadays the Laser Velocimeters based on the Doppler frequency shift find a lot of important applications, especially in some industrial processes and in hydrodynamic and aerodynamic research. The unique characteristics of the Laser Doppler Velocimetry (LDV) only recently have encountered a rival technique in the Particle Image Velocimetry (PIV), for applications on fluids. The main features of LDV systems are the accuracy and the speed of the measurements, the high spatial resolution and, of course, the non-intrusive character of the technique. Moreover this kind of systems present advantages not only in fluid applications: actually it can compete with the microwave radar in the estimation of the velocity of solid targets. This becomes possible due to the progressive reduction of prices of optoelectronic devices and the improvement of its performances. The monitoring of the traffic velocity and the control of machinery in the manufacture of paper, wires and cables or thread can be mentioned among these applications. European an American companies, as Dantek Electronic or TSI, to mention the two most representative, commercialize high performance general-purpose LDV systems. Up to the date these instruments are sizeable and expensive, and its use requires some special training. There is not doubt that the future market of the LDV systems goes through a substantial decrease of prices and, indeed, through the possibility of custom-built designs. The potential number of users would increase then in an important manner. Many efforts are now being devoted by researchers in that direction. Moreover, the important improvement of capabilities of the desktop computers makes unnecessary the special electronic processors that, up to now, have been provided by the manufacturers of LDV systems as a part of them. In this Thesis the design and realization of a complete Laser Doppler Anemometer is presented. The system can measure two components of a fluid velocity (2D-LDA) and originally it was conceived to be used in industrial and hydrodynamics applications. Following the philosophy outlined above, the design of our LDA system was performed with only one laser source and one detector module. The common commercially available LDAs, on the contrary, designed to measure two components of velocity, use two different optical wavelengths and two independent photodiodes. On the other hand, a general-purpose acquisition card with two input channels has been used to implement a multilevel trigger. The configuration performed here permits to work in each moment with the part of the burst having the best signal to noise ratio. This work has been supported by the Spanish Government, CICYT project PETRI 95-0249-OP. ; Postprint (published version)

Aware of the challenges faced by the social sciences in publishing a massive volume of research papers, it is worth looking at a novel but no longer so new ways of machine learning for the purposes of literature review. To this end, I explore a probabilistic topic model called Latent Dirichlet Allocation (LDA) in the context of the epistemological challenge of analysing texts on social welfare. This paper aims to describe how the LDA algorithm works for large corpora of data, along with its advantages and disadvantages. This preliminary characterisation of an inductive method for automated text analysis is intended to give a brief overview of how LDA can be used in the social sciences.