Search results for "Mill"
showing 10 items of 950 documents
A partial elucidation of the gauge principle
2008
The elucidation of the gauge principle "is the most pressing problem in current philosophy of physics" said Michael Redhead in 2003. This paper argues for two points that contribute to this elucidation in the context of Yang–Mills theories. (1) Yang–Mills theories, including quantum electrodynamics, form a class. They should be interpreted together. To focus on electrodynamics is potentially misleading. (2) The essential role of gauge and BRST symmetries is to provide a local field theory that can be quantized and would be equivalent to the quantization of the non-local reduced theory. If this is correct, the gauge symmetry is significant, not so much because it implies ontological conseque…
Una máquina para la industria medieval. Los batanes del sur valenciano : integración y negocio. Nuevas aportaciones (1490-1502).
2021
El artículo tiene como objetivo el estudio de la región batanera de las comarcas del sur valenciano a través de nuevas aportaciones documentales. A lo largo del siglo XV y principios del siglo XVI, en las comarcas de la Vall d'Albaida, el Comtat y Alcoià el número de batanes hidráulicos aumentó hasta los 38 molinos en funcionamiento. El artículo muestra las causas de esta concentración, explica las características técnicas que aportan los documentos, y la adaptación de los batanes al conjunto de la red molinar de la zona. El trabajo concluye explicando los sectores sociales y económicos (artesanos empresarios) que organizaron y protagonizaron este desarrollo técnico e industrial, aportando …
Effect of the milling conditions on the degree of amorphization of selenium by milling in a planetary ball mill
2007
The effect of the milling parameters (rotation speed of the milling device and duration of milling) on the phase composition of the products of milling of fully crystalline selenium has been investigated. The milling was conducted using a planetary micromill and the phase composition of the milling products was determined by differential thermal analysis. It has been found that ball milling leads to the partial amorphization of the starting crystalline material. The content of amorphous phase in the milling products depends, in a rather complicated way, on the milling parameters. At the milling parameters adopted in the present study, the milling product was never fully amorphous. The compl…
Investigation of the effect of intensive ball milling in a planetary ball mill on the thermal decomposition of cadmium carbonate and basic zinc carbo…
2007
The kinetics of thermal decomposition of cadmium carbonate CdCO3 and basic zinc carbonate ZnCO3?nZn(OH)2 and the effect of intensive milling in a planetary ball mill on its parameters, have been investigated. The values of the reaction heat and of the activation energies of thermal decomposition have been determined for both the compounds. Investigations of the thermal decomposition of the products of ball milling of investigated compounds revealed a slight effect of milling conditions on the reaction temperature and heat consumed during the thermal decomposition of ZnCO3?nZn(OH)2. No effect of ball milling on the thermal decomposition of CdCO3 has been found.
The second century CE Roman watermills of Barbegal Unraveling the enigma of one of the oldest industrial complexes
2018
Carbonate deposits provide insights into the operation of the earliest industrial utilization of hydropower by an ancient society.
Angus Campbell/Philip E. Converse/Warren E. Miller/Donald E. Stokes, The American Voter, New York 1960
2008
„American Voter“ gehort zu den am haufigsten zitierten Publikationen in der Wahlforschung. Seine herausragende Bedeutung erklart sich weniger aus den substantiellen Ergebnissen der Autoren — obwohl diese teils heute noch Gultigkeit haben — als vielmehr aus dem Erklarungsansatz, den die vier Autoren entwickelt haben. Zusammen mit Anthony Downs’ „Economic Theory of Democracy“ (→ Downs 1957) und „The People’s Choice“ von Lazarsfeld/Berelson/Gaudet (→ Lazarsfeld/Berelson/Gaudet 1944) bildet der „American Voter“ deshalb jene Trias von Klassikern, auf die sich die drei theoretischen Hauptstromungen der Wahlforschung — Rational Choice-Ansatz, (mikro-)soziologischer und sozialpsychologischer Ansatz…
Homenatge a Stanley L. Miller
2003
Conferència homenatge al professor Stanley L. Miller.
Sediment origin and pedogenesis in the former mill pond basin of Turznice (north-central Poland) based on magnetic susceptibility measurements
2016
Abstract This paper aims to assess the usefulness of magnetic susceptibility measurements in pedological studies of mill pond sediments. The study area includes the former Turznice mill pond basin located in the south-eastern part of the Grudziądz Basin. Four soil profiles were selected within the transect located along the longitudinal axis of the basin. The following soil properties were determined in the collected samples: bulk density, particle size distribution, pH, content of carbonates, approximate content of organic matter (LOI), total organic carbon (TOC), total nitrogen (Nt), and the pseudo-total contents of metals (Fe, Mn, Cu, Zn, Pb, Ni, Cd). The obtained results were correlated…
Le maschere e il volto. Aspetti della crisi del soggetto nella cultura contemporanea
2014
Relationship between Training Load Management and Immunoglobulin A to Avoid Immunosuppression after Soccer Training and Competition: A Theoretical Fr…
2021
Immunoglobulin A (IgA), which is the main effector against upper respiratory tract viruses such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), has been related to training load management. The aim of this systematic review was to establish the relationship between training load and salivary IgA based on current evidence in order to avoid immunosuppression after exercise and players´ vulnerability to virus contagion. A systematic review of relevant articles was carried out using two electronic databases (PubMed and Web of Science) until 19 May 2021. From a total of 127 studies initially found, 23 were included in the qualitative synthesis. These studies were clustered depen…