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Introduction
Current institution
Sínese - Consultoria Lda.
Current position
- Manager
Publications
Publications (17)
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Judo is a sport that is constantly evolving. Rule modifications and changes in tactical strategies have enhanced scoring opportunities and reduced penalties. This study analyzed the evolution of the temporal structure of combat through an assessment of the total match time (TMT), time engaged in combat (CT), time without (TWOG) and with grip (...
Background and Study Aim. Following previous changes, new rules are applied to Judo competition since January 1, 2014. Some of the new rules
Roughly 1/6 of the world’s kimberlites are Angolan. In addition to the 700+ kimberlites discovered between 1952 and 1974, recent exploration work has generated a big expansion of that number.
Some of those kimberlites are world-class deposits, surely the Catoca and possibly the Camatchia pipes. The Camútuè cluster of kimberlites, although with lowe...
Published under the EXPERT VIEW section, this is an extract of a report on the Angolan diamond industry entitled One Century of Angolan diamonds, published on 18 October. The report is authored by Luís Chambel, with major contributions by Luís Caetano and Manuel Reis from Sínese and Eaglestone.
2012 is the year in which Angolan diamonds turn one century. Since the discovery of the first diamonds in 1912 in the Mussulala River - Lunda Norte, Angola has rapidly grown into a major producing country. This report celebrates that fact and describes the Angolan diamond industry’s current situation, its future perspectives and opportunities.
With...
Este relatório contém a actualização em 2013 do estudo realizado em 2011 para o mercado dos Estados Unidos. O estudo foi realizado pela Sínese para a ASSIMAGRA (a quem agradeço a autorização para a sua divulgação através desta página e do blog), tendo sido coordenado por Luís Chambel e Luís Caetano
Este relatório é um documento preparado ao longo de 2011 sobre os mercados das Américas para a Pedra Natural portuguesa. O estudo foi realizado pela Sínese para a ASSIMAGRA (a quem agradeço a autorização para a sua divulgação através desta página e do blog), tendo sido coordenado por Luís Chambel e Luís Caetano.
Cut diamonds are hard to value given the number and type of properties used in price construction. This project aims to develop a valuation model for cut diamonds based on data published on the Internet. Regression trees (Classification and Regression Trees and Chi-Square Automatic Interaction Detection) and neural networks (using backpropagation)...
Os depósitos aluvionares da bacia do Rio Jequitinhonha, em Minas Gerais, constituíram a fonte da maior parte dos diamantes produzidos no Brasil desde 1714 até meados da década de 1980. Essa importância histórica e econômica motivou a apresentação dos dados quanto à granulometria e qualificação gemológica dos diamantes nas áreas de concessão das min...
The analysis conducted confirmed what was expected: a marked size decrease tendency in the direction of the river flow. The study has also shown that functions of the logarithm type show a good adherence to the available data, both in the Chicapa and Namibia cases. Although with fewer data, a diamond size distribution analysis was conducted. That p...
The Portuguese chain of diamond industries is today in a phase of decline, after a period – between 1912 and 1975 – in which Angolan diamond deposits were discovered and developed and an important cutting industry was established in Lisbon.
The purpose of this work is to support the development of the chain of diamond industries in Portugal through...
Ore reserve estimation of alluvial diamond deposits of river Luachimo (Lunda Norte, Angola) was carried out by the authors, using different methods to compare results obtained. This paper includes all conclusions drawn from this comparison, supported by conceptual differences of each estimation method. The estimates arrived at (for subsequently min...
Introduction It is long known that diamond deposits are characterised by specific properties of their diamonds' populations. The average weight, value or quality, the unusual frequency of certain crystal shapes or another property of diamond populations has been associated to certain areas or deposits. The Campo Sampaio deposit (Diamantina, Brazil)...
