Xenophobia and other reasons to wonder about the domain specificity of folk-biological classification

1998 ◽  
Vol 21 (4) ◽  
pp. 575-576
Author(s):  
Terence E. Hays

Atran adds a synthesis of much of the literature on folk-biological classification to important new experimental data relevant to long-standing inferences about the structure of folk taxonomies. What we know about such systems is somewhat overstated, and key issues remain unresolved, especially concerning the centrality of “generic species,” the primacy of “general purpose” taxonomies, and domain specificity.

Author(s):  
Balasubramanyam Sasanapuri

Virtual Model Basin (VMB) developed based on RANS CFD Approach along with VOF model to simulate free-surface has been used to perform benchmark studies and the results are presented in this paper. The VMB based on general purpose CFD solver ANSYS FLUENT has been used to simulate resistance and diffraction problems for a Navy surface combatant hull and the results are validated against experimental data. The resistance simulations are done to assess two turbulence models and best among the two is used to solve the diffraction problem. The validation results suggest that the VMB approach reproduces the flow features, forces and moments accurately.


Database ◽  
2013 ◽  
Vol 2013 ◽  
Author(s):  
Reza M. Salek ◽  
Kenneth Haug ◽  
Pablo Conesa ◽  
Janna Hastings ◽  
Mark Williams ◽  
...  

Abstract MetaboLights is the first general-purpose open-access curated repository for metabolomic studies, their raw experimental data and associated metadata, maintained by one of the major open-access data providers in molecular biology. Increases in the number of depositions, number of samples per study and the file size of data submitted to MetaboLights present a challenge for the objective of ensuring high-quality and standardized data in the context of diverse metabolomic workflows and data representations. Here, we describe the MetaboLights curation pipeline, its challenges and its practical application in quality control of complex data depositions. Database URL: http://www.ebi.ac.uk/metabolights


2017 ◽  
Vol 62 (3) ◽  
pp. 1713-1720
Author(s):  
J. Borowiecka-Jamrozek

Abstract This paper discusses the mechanical properties of materials fabricated from commercially available powders designed for use as a metal matrix of diamond-impregnated composites. The powders with the catalogue numbers CSA and CSA800 produced in China were tested under laboratory conditions. The specimens were fabricated in a graphite mould using hot pressing. The materials were analysed for density, porosity, hardness and static tensile strength. A scanning electron microscope (SEM) was employed to observe the microstructure and fracture surfaces of the specimens. The experimental data was used to determine how the chemical composition of the powders and the process parameters affected the microstructure and properties of the materials. The properties of the sintered materials produced from the Chinese powders were compared with the properties reported for specimens fabricated from cobalt powder (Co SMS). Even though the hot pressed CSA and CSA800 powders had inferior mechanical properties to their cobalt analogue, they seem well-suited for general-purpose diamond-impregnated tools with less demanding applications.


Author(s):  
Calvin M. Stewart ◽  
Erik A. Hogan ◽  
Ali P. Gordon

Directionally solidified (DS) Ni-base superalloys have become a commonly used material in gas turbine components. Controlled solidification during the material manufacturing process leads to a special alignment of the grain boundaries within the material. This alignment results in different material properties dependent on the orientation of the material. When used in gas turbine applications the direction of the first principle stress experienced by a component is aligned with the enhanced grain orientation leading to enhanced impact strength, high temperature creep and fatigue resistance, and improve corrosion resistance compared to off axis orientations. Of particular importance is the creep response of these DS materials. In the current study, the classical Kachanov-Rabotnov model for tertiary creep damage is implemented in a general-purpose finite element analysis (FEA) software. Creep deformation and rupture experiments are conducted on samples from a representative DS Ni-base superalloys tested at temperatures between 649 and 982°C and two orientations (longitudinally- and transversely-oriented). The secondary creep constants are analytically determined from available experimental data in literature. The simulated annealing optimization routine is utilized to determine the tertiary creep constants. Using regression analysis the creep constants are characterized for temperature and stress-dependence. A rupture time estimation model derived from the Kachanov-Rabotnov model is then parametrically exercised and compared with available experimental data.


2018 ◽  
Vol 22 (2) ◽  
pp. 377-380
Author(s):  
V.M. Mrug ◽  
O.V. Rymsha ◽  
Yu.Yu. Trofimenko

The purpose of general microbiology is to study the morphology and physiology of microorganisms, the effect of external factors and their variability, diagnosis of diseases. This knowledge is important not only in the study of infection, but also in internal diseases sciences, surgery, gynecology, dermatology, etc. The objective of the work is to present methodological approaches to the teaching of medical microbiology to students of the National Pirogov Memorial Medical University. In our opinion, the methodical and informative developments practical classes in some form of basic program contribute to facilitated understanding and obtaining of the knowledge in microbiology by students. Each methodological development includes the relevance of the topic, the general purpose and specific goals, the main and additional literature. An important role in the mastery of discipline plays the workbook developed by the department for self-training and conducting practical exercises for microbiology, virology and immunology. It contains a thematic plan of practical classes on microbiology, virology and immunology for students of the medical faculty (specialty “Medicine”) and a thematic plan for non-auditing work of students. A protocol has been developed for each topic of every lesson, which includes a list of key issues to be studied and recommended literature. For self-control test tasks from data bank “Krok-1” and situational tasks are presented. Promising to improve the teaching of medical microbiology is the introduction of various methodological materials, one of which is a workbook for practical classes. This is important for the students to independently study material of instruction to use methodical manuals that give an opportunity to increase the efficiency of its learning and to restore knowledge from previous topics, integrated with those who study. The use of a workbook greatly improves the efficiency of practical work, as it contains the briefest information on the implementation of laboratory studies. When preparing the theoretical material, it is easier for students to master the key issues of the topics that will be considered during practical classes. Thus, the continuous improvement of the methods of teaching the subject and assimilation by the students of the program, can increase the level of knowledge on microbiology that will be required for the future doctor for the consistent and targeted possession of diagnostic techniques and the correct purpose of treatment.


1964 ◽  
Vol 86 (4) ◽  
pp. 543-550 ◽  
Author(s):  
J. J. Henry ◽  
H. Fenech

The mathematical analysis of a thermal contact by Fenech and Rohsenow requires knowledge of certain parameters describing the geometry of the contact interface. These parameters are volume average thickness of the void above and below the plane of the contact, the number of contacts per unit area, and the ratio of the actual contact area to the total area. The authors outline a method for determining these parameters graphically. This paper describes a method for obtaining analog voltages of surface profiles of contacting surfaces and the application of a general purpose analog computer to determine the geometric parameters of contact as a function of contact pressure. The results of applying this method are combined with the analysis of Fenech and Rohsenow. The predicted contact conductance is found to agree well with experimental data at mean contact temperatures of 100, 200, and 300 F for load pressures of 100 to 20,000 psi.


Author(s):  
Ugo Finardi

Nanotechnologies and nanosciences are one of the most important novelties in the panorama of sciences and technologies. This work presents: their evolution since their first emergence; their most important scientific and technological features; the analysis of their role in society and economics in the socio-economic literature; their main areas of scientific and technological evolution and deployment; the motivations of the interests towards them in science and society. Nanotechnologies and nanosciences originate from a recombination of pre-existing research fields; they have the character of being a general-purpose technology and are linked to classic scientific areas. The character of Disruptive Technology of nanotechnologies and nanosciences is assessed also with the use of experimental data from a bibliographic analysis. Several examples of nanotechnological items are presented, either yet in the hands of consumers or showing promising features for the near future. The accurate description of this newly expanding area of sciences and technologies can provide important insights to the scholars and practitioners who are engaged in the study of this field of science, technology, and innovation, or aim at comparing this with related fields.


2014 ◽  
pp. 1-20
Author(s):  
Ugo Finardi

Nanotechnologies and nanosciences are one of the most important novelties in the panorama of sciences and technologies. This work presents: their evolution since their first emergence; their most important scientific and technological features; the analysis of their role in society and economics in the socio-economic literature; their main areas of scientific and technological evolution and deployment; the motivations of the interests towards them in science and society. Nanotechnologies and nanosciences originate from a recombination of pre-existing research fields; they have the character of being a general-purpose technology and are linked to classic scientific areas. The character of Disruptive Technology of nanotechnologies and nanosciences is assessed also with the use of experimental data from a bibliographic analysis. Several examples of nanotechnological items are presented, either yet in the hands of consumers or showing promising features for the near future. The accurate description of this newly expanding area of sciences and technologies can provide important insights to the scholars and practitioners who are engaged in the study of this field of science, technology, and innovation, or aim at comparing this with related fields.


2010 ◽  
Vol 43 (5) ◽  
pp. 1126-1128 ◽  
Author(s):  
Marcin Wojdyr

Fitykis portable, open-source software for nonlinear curve fitting and data analysis. It specializes in fitting a sum of bell-shaped functions to experimental data. In particular, it enables Pawley refinement of powder diffraction data and size–strain analysis.


Author(s):  
Guilherme Vaz ◽  
Olaf J. Waals ◽  
Harald Ottens ◽  
Fahd Fathi ◽  
Tim Le Soue¨f ◽  
...  

Current loads on stationary vessels have been investigated as part of the Current Affairs Joint Industry Project (JIP). Model-tests, semi-empirical models and CFD methods were used to predict these loads. This paper examines one configuration out of the eight tested in the JIP; an idealized semi-submersible consisting of two square rounded-corner columns connected with a pontoon. The model experiments, empirical model predictions and CFD results are presented and discussed. ‘Blind’ and ‘Improved’ CFD computations (with and without knowledge of the experimental results) have been carried out by the JIP participants. Comparisons between these results are made, deviations from the experimental data are quantified and conclusions are drawn. Two key issues for modeling accuracy are identified and discussed; the location of the transition to turbulent flow and the control of the numerical errors.


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