1,724,275 research outputs found
Debugger untuk mikroprosesor 6809 dengan bantuan mikrokomputer IBM PC/XT
No full textPrinsip evaluasi DEBUGGER ini adalah mengamati keadaan register-register serta status mikroprosesor yang dihasilkan dari suatu operasi mikroprosesor, yaitu eksekusi program atau instruksi. Mikroprosesor yang dipakai dan dipelajari adalah mikroprosesor 6809, serta sistem evaluasi yang dibuat berupa suatu sistem minimum mikroprosesor 6809 yang di-interface-kan ke mikrokomputer IBM PC/XT melalui saluran komunikasi seri RS-232C dengan tujuan untuk mendukung operasi sistem. Adapun piranti pendukung dalam sistem minimum tersebut adalah piranti-piranti memori (EPROM dan RAM), timer, dan interface komunikasi serial. Program yang akan dievaluasi dikirimkan dari mikrokomputer dan disimpan dalam memori sistem minimum. Program dievaluasi dengan cara menginterrupt mikro-prosesor untuk menghentikan eksekusi program pada instruksi tertentu. Interrupt yang diperlukan untuk proses evaluasi ini dibangkitkan oleh piranti timer yang terdapat pada sistem minimum. Selanjutnya infor-masi register-register dikirimkan ke mikrokomputer untuk ditampilkan pada layar monitor
Proper motions and membership probabilities of stars in the region of globular cluster NGC 6809
No full textContext. NGC 6809 is a luminous metal-poor halo globular cluster that is relatively easy to study due to its proximity and low concentration. Because of its high Galactic latitude (b = −23°), interstellar reddening and contamination is not very high.
Aims. We aim to determine the relative proper motion and membership probability of the stars in the wide area of globular cluster NGC 6809. To target cluster members reliably during spectroscopic surveys and both spatial and radial distributions in the cluster outskirts without including field stars, a good proper motion and membership probability catalogue of NGC 6809 is required.
Methods. The archival data of two epochs with a time-base line of 7.1 years have been collected with Wide Field Imager (WFI) mounted on the 2.2 m MPG/ESO telescope. The CCD images of both epochs have been reduced using the astrometric techniques as described in Anderson et al. (200
Caroline DUPUIS, Der Plinius-Kommentar des Paulus Manutius im Codex Parisinus Latinus 6809.
No full textLaureys Marc. Caroline DUPUIS, Der Plinius-Kommentar des Paulus Manutius im Codex Parisinus Latinus 6809. . In: L'antiquité classique, Tome 72, 2003. pp. 678-679
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Chemical evolution of the metal poor globular cluster NGC 6809
No full textTesis presentada para optar al grado de Magíster en Ciencias con mención en Física.NGC 6809 es un Cúmulo Globular que se encuentra ubicado en el Halo de nuestra Galaxia. Dada su edad, NGC 6809 es un perfecto candidato para estudiar la evolución química y la historia de la formación estelar de la Vía Láctea. Nuestro principal objetivo es realizar un estudio espectroscópico lo más preciso posible. En esta tesis presentamos el analisis químico de 11 estrellas gigantes basado en espectros de alta resolución. Los datos fueron obtenidos de la plataforma ESO Science Archive y provienen del espectrógrafo FLAMES/UVES montado en UT2 en el telescopio VLT. Utilizando dos tecnicas: Ancho equivalente (EW) y espectrosintesis, derivamos las abundancias de los siguiente elementos químicos: O, Na, Mg, Al, Si, Ca, Ti, V, Cr, Mn, Fe, Co, Sc, Ni, Cu, Zn, Y, Zr, Ba, La, Ce, Eu, Nd y Dy. Encontramos una velocidad radial heliocéntrica de 174.7 3.2 km s1 y un contenido de Hierro de [Fe/H]=-2.01 0.02 (error en el promedio). Encontramos un enriquecimiento de 0.40 0.04 que corresponde a un valor típico de los Cúmulos Globulares en este rango de metalicidad. Una gran dispersión es observada en las abundancias de los elementos livianos O, Na, Al y Mg confirmando la presencia de una anticorrelación entre Na-O y Mg-Al. No encontramos ningún tipo de variacion en los elementos iron-peak ni en los elementos pesados.Facultad de Ciencias Físicas y MatemáticasConcepció
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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