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The usage of industrial robots for milling tasks is limited by their lack of absolute accuracy in presence of process forces. While there are techniques and products available for increasing the absolute accuracy of free-space motions, the mechanical weaknesses of the robot in combination with the milling forces limits the achievable performance. If the dynamic effects causing the deviations can b
F. Scott Fitzgerald’s The Great Gatsby and Don Delillo’s White Noise both portray the modern world even though they were written over 60 years apart. Despite the fact that these worlds represent very different states of modernity, they are defined by two central traits: technology and consumerism, which influence the characters of both novels in several comparable ways. The concept of packaging is
The paper examines the reception of and revisions made to the teachings of the Italian astrologer-monk Placido de Titi (1603 – 1668) in Protestant England following the decline of astrology during the 18th century, particularly as found in the writings of John Worsdale (1766 – c. 1826), whose role in the emergence of modern astrology is to a certain extent reappraised, and of his contemporary crit
Background: In ultra-rare sarcomas (URS) the conduction of prospective, randomized trials is challenging. Data from retrospective observational studies (ROS) may represent the best evidence available. ROS implicit limitations led to poor acceptance by the scientific community and regulatory authorities. In this context, an expert panel from the Connective Tissue Oncology Society (CTOS), agreed on
BACKGROUND: Epidemiological studies have demonstrated an association between the degree of food processing in our diet and the risk of various chronic diseases. Much of this evidence is based on the international Nova classification system, which classifies food into four groups based on the type of processing: (1) Unprocessed and minimally processed foods, (2) Processed culinary ingredients, (3)
John-Paul Himka’s new book, Ukrainian Nationalists and the Holocaust: OUN and UPA’s Participation in the Destruction of Ukrainian Jewry, 1941-1944, represents a milestone in research on the complicity of the OUN-UPA in the Holocaust. Based on decades worth of research in dozens of archives around the world, Himka makes a well-documented and indisputable case for Ukrainian nationalist involvement i
Peroxisomes and mitochondria were purified from potato tubers (Solanum tuberosum L. cv. Bintje) by differential centrifugation followed by separation on a continuous Percoll gradient containing 0.3 M sucrose in the lower half and 0.3 M mannitol in the upper half. The peroxisomes band at the bottom and the mitochondria in the middle of this type of gradient. Mitochondrial contamination of the perox
In this paper, we revisit the classical perspective-n-point (PnP) problem, and propose the first non-iterative O(n) solution that is fast, generally applicable and globally optimal. Our basic idea is to formulate the PnP problem into a functional minimization problem and retrieve all its stationary points by using the Gr¨obner basis technique. The novelty lies in a non-unit quaternion representati
Banknotes and their design play an important role in creating a nation’s identity.This paper analyzes the design of German, French and Italian banknotes in the period after the formation of national states in the 19th century until the outbreak of World War II. We take into account the economic development of these countries and relate it to banknote issuance. Our analysis reveals that the banknot
Objective. Obsessive-compulsive disorder (OCD) is a heterogeneous condition with well-established symptom dimensions across the lifespan. The objective of the present study was to use network analysis to investigate the internal structure and central features of these dimensions in unselected schoolchildren and in youth with OCD.Method. We estimated the network structure of OCD symptom dimensions
