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Publication Repository
3058 Publications


  • Theory of an Emerging-State Actor: the ISIS Case

    Clancy, Timothy
    This paper seeks to explain the rapid growth of the Islamic State of Iraq & Syria (ISIS) and approach the question of “what is” the Islamic State? The paper offers several contributions. First is the proposal of a dynamic hypothesis that ISIS is an emerging-state actor and differs notably from traditional non-state actors and insurgencies. The theory consists of both a causal loop diagram and key propositions. A detailed system dynamics simulation (E-SAM) was constructed to test the theor...

    Tutorial on EM Algorithm

    Nguyen, Loc
    Maximum likelihood estimation (MLE) is a popular method for parameter estimation in both applied probability and statistics but MLE cannot solve the problem of incomplete data or hidden data because it is impossible to maximize likelihood function from hidden data. Expectation maximum (EM) algorithm is a powerful mathematical tool for solving this problem if there is a relationship between hidden data and observed data. Such hinting relationship is specified by a mapping from hidden data to o...

    The Numerical Approach to Genetic Code and Its Elucidations for Structure and Code-Amino Acid Assignment Patterns of the Genetic Code System

    Ahmed, Noor
    To understand the degeneracy, symmetry and code-amino acid assignments in the standard genetic code system, theoretical approach is tested based on allotting numerical values to each nucleotide base of DNA and generated the concept of numerical values of codons. When codon values are calculated according to the numerical values of their each nucleotide base, a significant association among the codon values of each amino acid is observed and a map is constructed according to their values of ea...

    A Reliable Turning Process by the Early Use of a Deep Simulation Model at Several Manufacturing Stages

    A.Alonso, Miguel; De Lacalle, Luis
    The future of machine tools will be dominated by highly flexible and interconnected systems, in order to achieve the required productivity, accuracy and reliability. Nowadays, distortion and vibration problems are easily solved in labs for the most common machining operations by using models based on equations describing the physical laws of the machining processes; however additional efforts are needed to overcome the gap between scientific research and the real manufacturing problems. In fa...

    Cancer and Non-Cancer Risk of Santiago Island (Cape Verde) Population due to Potential Toxic Elements Exposure from Soils

    Da Silva, Eduardo.; Silva, Maria; Pinto, Marina; Reis, Amelia
    Projects: FCT | UID/GEO/04035/2013 (147458), FCT | SFRH/BPD/71030/2010 (SFRH/BPD/71030/2010)
    The hazard and the carcinogenic risks due to the exposure to some potentially toxic elements by the Santiago Island (Cape Verde) population where calculated, considering soil ingestion, inhalation and dermal contact as exposure pathways. The topsoil of Santiago Island is enriched in Co, Cr, Cu, Ni, V, Zn, Mn and Cd to upper crust values. Hazard indices (HI) were calculated for these metals and As exposures, of Santiago Island population and the calculations were performed for children and adu...
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