1,672 research outputs found
Interview with Hassan Abou Taleb
No full textفي هذه المقابلة، يتحدث د. حسن أبو طالب، مساعد مدير مركز الأهرام للدراسات الاستراتيجية، عن النزاع العربي الاسرائيلي، والعلاقات الأمريكية الخارجية بالشرق الأوسط. أجرت المقابلة نرمين محمود.In this interview, Dr. Hassan Abou Taleb, assistant director for the Ahram Center for Strategic Studies, speaks about the Arab-Israeli conflict and discusses U. S. foreign relations with the Middle East. The interview was conducted by Nermine Mahmoud
Metabolomics of critically-ill COVID19 patients
No full textRaw metabolomics data for critically ill COVID-19 patients at IC
Variation of used vegetable oils’ composition upon treatment with algerian clays
No full textThe treatment of used vegetable oils (UVOs) with clays represents a pivotal step in their industrial recycling process as well as one of the most challenging topics for researchers. In particular, cheap, effective, and sustainable powders need to be explored in order to develop new processes which produce beneficial results in relation to economic and environmental aspects. In this context, five samples within commercial and waste vegetable oils were treated with two sodium-and calcium-based bentonites employing a low oil/bentonite ratio (0.15 wt%). The outcomes of the processes were monitored by FT-IR spectroscopy and compared with the data relative to the parent commercial edible oil. In particular, treatment of FT-IR data by multivariate statistical analysis allowed us to determine a chemical fingerprint characteristic of each sample. Important relationships between the overall chemical composition and the specific clay employed and the treatment time (2 or 4 h) were highlighted. Finally, N2 physisorption, TEM microscopy, and FT-IR analyses of the more efficient Na bentonite allowed us to characterize the material and thus to furnish all the information needed to set-up a general protocol for the partial regeneration of waste vegetable oil destined for further processing
Theory of financial risk
No full textThis paper examines relationships between theory of financial risk and size. Based on the work of Makridakis / Taleb [2009] and Taleb / Tapiero [2009], presents the problems of excessive risk and imbalances caused by the size of firms. Markets mixed on firm growth traps externalities can influence risk, high-cost for the commons. A policy of regulation and control in markets, while necessary, are still insufficient in economies with little institutional support. Externalities of risk and firm size categories are fundamental to understanding the present financial crisis since the economies of scale.Finance, financial engineering, risk assesment.
Khaoula Taleb-Ibrahimi, Les Algériens et leur(s) langue(s), Éléments pour une approche sociolinguistique de la société algérienne. Alger, les éditions El-Hikma, 1995, préface de Gilbert Grandguillaume (collection «Connaissance de l’Algérie contemporaine»)
No full textDichy Joseph. Khaoula Taleb-Ibrahimi, Les Algériens et leur(s) langue(s), Éléments pour une approche sociolinguistique de la société algérienne. Alger, les éditions El-Hikma, 1995, préface de Gilbert Grandguillaume (collection «Connaissance de l’Algérie contemporaine»). In: Bulletin critique des annales islamologiques, n°15, 1999. pp. 21-23
A relação entre antifragilidade e incerteza à luz das contribuições de Taleb
No full textThis study aims to review the theme of the two main works of author Nassim Nicholas Taleb:
The Black Swan: The impact of the highly improbable (2008) and Antifragile: Things that
benefit from chaos (2014), with emphasis for the second, believing it to be a work that more
fully contemplates their understanding of uncertainty, risk management and how we can take
advantage of uncertain situations. A secondary objective is to understand his contribution and
current relevance to the study related to uncertainty and randomness of events, in the sense that
they do not follow a deterministic pattern and how concepts apparently related to the fields of
statistics can be applied to everyday life, with several examples, allegories and metaphors that
the author proposes throughout the works bringing his thoughts to the reality of readers in a
more clear and objective way, the practical content of his narrative may be due to his practical
experience in the financial market in the past and his current role in scientific production, Taleb
certainly forms the "bridge" between empirical and theoretical knowledge. The uncertainty in
Taleb's idea takes on a peculiar nuance with the allegory of the Black Swan, which are ev events
that, because they are highly improbable and rare, seem to have no effect on our reality, but
with the development of the theme we come to understand its relevance with both positive and
negative consequences for reality and more than trying to predict it (which would be
impossible), we are compelled to adopt a posture that makes us not only resilient, but better,
more prepared and with fewer weaknesses, which the author will call “antifragile”. Therefore,
those who adopt an antifragile posture should not be concerned about the lack of inherent
information about the uncertain, but should be more concerned about learning that what is not
within our reach at present, can bring us later in the future.Este estudo tem como principal objetivo fazer uma resenha sobre a temática das duas principais
obras do autor Nassim Nicholas Taleb: O Cisne Negro: O impacto do altamente improvável
(2008) e Antifrágil: Coisas que se beneficiam com o caos (2014), com destaque para a segunda
acreditando se tratar de uma obra que contempla de forma mais completa seu entendimento
sobre incerteza, gerenciamento de risco e como podemos tirar proveito de situações incertas.
Um objetivo secundário está em entender sua contribuição e relevância atual para o estudo
relacionado a incerteza e aleatoriedade dos eventos, no sentido que estes não seguem um padrão
determinístico e como conceitos aparentemente relacionados aos campos da estatística podem
se aplicar a vida cotidiana, com vários exemplos, alegorias e metáforas que o autor propõe ao
longo das obras trazendo para realidade dos leitores seu pensamento de forma mais clara e
objetiva, o teor pratico da sua narrativa talvez seja em função da sua experiência pratica no
mercado financeiro no passado e sua atuação no presente na produção cientifica, Taleb
certamente faz a “ponte” entre o conhecimento empírico e teórico. A incerteza na ideia de Taleb
ganha uma nuance peculiar com a alegoria do Cisne Negro, que são eventos que por serem
altamente improváveis e raros, parecem não ter efeito na nossa realidade, mas que com o
desenvolvimento do tema passamos a entender sua relevância com consequências tanto
positivas quanto negativas para a realidade, e mais do que tentar prevê-lo (o que seria
impossível), somos compelidos a ter uma postura que nos tornem não apenas resilientes, mas
melhores, mais preparados e com menos fraquezas, o que o autor vai chamar de “antifrágil”.
Portanto, aquele que adota uma postura antifrágil não deve se preocupar com a falta de
informações inerentes sobre o incerto, mas deve estar mais preocupado no aprendizado que
aquilo que no presente não está ao nosso alcance, pode nós trazer posteriormente no futuro
“The Persian Prince in Londonâ€: Autoethnography and Positionality in Travels of Mirza Abu Taleb Khan
No full textThis paper explores the strategies and dynamics of Asian representation of the self and the colonial other in Travels of Mirza Abu Taleb Khan (1810). I argue that while the process of autoethnography in an early period of colonisation anticipates the subsequent oscillation between submission and resistance, such representations are made complex by the positionality of the author within his milieu. Taleb’s text is marked by the ambiguity of his response to colonialism, engaging in a simultaneous admiration and critique of western practices, a critique that is made possible by his identity as the “Persian Prince.†Yet in its history of print, circulation and reception it becomes a tool in the propagation of colonial power
The Decline of Violent Conflicts: What Do The Data Really Say?
No full textWe propose a methodology to look at violence in particular, and other aspects ofquantitative historiography in general, in a way compatible with statistical inference, which needs to accommodate the fat-tailedness of the data and the unreliability of the reports of conflicts. We investigate the theses of “long peace” and drop in violence and find that these are statistically invalid and resulting from flawed and naive methodologies, incompatible with fat tails and non-robust to minor changes in data formatting and methodologies. There is no statistical basis to claim that “times are different” owing to the long inter-arrival times between conflicts; there is no basis to discuss any “trend”, and no scientific basis for narratives about change in risk. We describe naive empiricism under fat tails. We also establish that violence has a “true mean” that is underestimated in the track record. This is a historiographical adaptation of the results in Cirillo and Taleb (2016)
Recycling of used vegetable oils by powder adsorption
No full textThe treatment of used vegetable oil (UVO) with seven different adsorbents and through two different procedures (stirring and gravity filtration) was explored. Important differences in terms of density, turbidity, electrical resistance, free fatty acids (FFAs) content and relative fatty acid distribution were observed. Different outcomes were shown depending both on the adsorbent and on the procedure. Lower values of density and FFAs were registered for oils treated by gravity filtration with portland (respectively 0.6% and 0.81 g/ml) and celite (respectively 0.7% and 0.72 g/ml). Considering the undesired leaching from the powder to the oil, related to the turbidity, the celite resulted more suitable for the oil recycling (241 Nephelometric Turbidity Unit (NTU) for portland vs 184 NTU for celite). In addition, Fourier-transform infrared spectroscopy combined with multivariate analysis allowed to determine a chemical fingerprint relative characteristic of vegetable oils recycled by gravity or by adsorption by stirring
Quality, Risk and the Taleb Quadrants
No full textAbstract The definition and the management of quality has evolved and assumed a variety of approaches, responding to an increased variety of needs. In industry, quality and its control has responded to the need of maintaining an industrial process operating as "expected", reducing the process sensitivity to uncontrolled disturbances (robustness) etc. By the same token, in services, quality has been defined as "satisfied customers obtaining the services they expect". Quality management, like risk management, has a general negative connotation, arising from the consequential effects of "non-quality". Quality, just as risk, is measured as a consequence resulting from factors and events defined in terms of the statistical characteristics that underlie these events. Quality and risk may thus converge, both conceptually and technically, expanding the concerns that both domains are confronted with and challenged by. In this paper, we analyze such a prospective convergence between quality and risk, and their management. In particular we emphasize aspects of integrated quality, risk, performance and cost in industry and services. Throughout such applications, we demonstrate alternative approaches to quality management, and their merging with risk management, in order to improve both the quality and risk management processes. In the analysis we apply the four quadrants proposed by Nassim Taleb for mapping consequential risks and their probability structure. Three case studies are provided, one on risk finance, a second one on risk management of telecommunication systems and a third one on quality and reliability of web based services
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