196,234 research outputs found
Commutative Algebra/ Aron Simis.
No full textIn English.This unique book on commutative algebra is divided into two parts in order to facilitate its use in several types of courses. The first introductory part covers the basic theory, connections with algebraic geometry, computational aspects, and extensions to module theory. The more advanced second part covers material such as associated primes and primary decomposition, local rings, M-sequences and Cohen-Macaulay modules, and homological methods.Frontmatter -- Thanks -- Foreword -- Contents -- 1. Basic introductory theory -- 2. Main tools -- 3. Overview of module theory -- 4. Derivations, differentials and Jacobian ideals -- 5. Basic advanced theory -- 6. Homological methods -- 7. Graded structures -- Bibliography -- Index1 online resource (XVI, 340 p.)
Cryogenic Mimim and Simis Microwave Detectors
No full textMicrowave detectors of the Metal-Insulator-Metal-Insulator-Metal (MIMIM) structure and the Superconductor-Insulator-Metal-Insulator-Superconductor (SIMIS) structure have been designed, fabricated and investigated. The difference of such samples was in external electrodes, MIMIM uses copper external electrodes, while SIMIS uses aluminum. Identical in dimensions MIMIM and SIMIS samples have been fabricated and experimentally studied in the temperature range of 0.1-2.7 K. Voltage and current response were measured at 300 GHz external irradiation using Backward Wave Oscillator (BWO). According to our estimates, the MIMIM current responsivity is 1.1\ub7103 A/W in the case of a photon response and 4\ub7104 A/W in the case of a bolometric response. The estimated noise equivalent power is in the range 2.5\ub710 18 W/v Hz to 1.2\ub710-19 W/vHz
Sylvester forms and Rees algebras
No full textThis work is about the Rees algebra of a nite colength almost complete intersection ideal
generated by forms of the same degree in a polynomial ring over a eld. We deal with two
situations which are quite apart from each other: in the rst the forms are monomials in an
unrestricted number of variables, while the second is for general binary forms. The essential
goal in both cases is to obtain the depth of the Rees algebra. It is known that for such ideals the
latter is rarely Cohen{Macaulay (i.e., of maximal depth). Thus, the question remains as to how
far one is from the Cohen{Macaulay case. In the case of monomials one proves under certain
restriction a conjecture of Vasconcelos to the e ect that the Rees algebra is almost Cohen{
Macaulay. At the other end of the spectrum, one proposes a proof of a conjecture of Simis
on general binary forms, based on work of Huckaba{Marley and on a theorem concerning the
Ratli {Rush ltration. Still within this frame, one states a couple of stronger conjectures that
imply Simis conjecture, along with some solid evidence.Este trabalho versa sobre a algebra de Rees de um ideal quase intersec cão completa, de cocomprimento
nito, gerado por formas de mesmo grau em um anel de polinômios sobre um
corpo. Considera-se duas situa c~oes inteiramente diversas: na primeira, as formas s~ao mon^omios
em um n umero qualquer de vari aveis, enquanto na segunda, s~ao formas bin arias gerais. O
objetivo essencial em ambos os casos e obter a profundidade da algebra de Rees. E conhecido
que tal algebra e raramente Cohen{Macaulay (isto e, de profundidade m axima). Assim, a quest~ao
que permanece e qua o distante são do caso Cohen{Macaulay. No caso de monômios prova-se,
mediante certa restri cão, uma conjectura de Vasconcelos no sentido de que a algébra de Rees e
quase Cohen {Macaulay. No outro caso extremo, estabelece-se uma prova de uma conjectura de
Simis sobre formas bin arias gerais, baseada no trabalho de Huckaba{Marley e em um teorema
sobre a ltera cão de Ratli {Rush. Al em disso, apresenta-se um par de conjecturas mais fortes
que implicam a conjectura de Simis, juntamente com uma evidência s olida
Embolics de família : la controvertida història evolutiva dels simis antropomorfs
No full textUn article de revisió publicat a Journal of Human Evolution per Alessandro Urciuoli, investigador postodoctoral de la UAB, i David M. Alba, director de l'Institut Català de Paleontologia Miquel Crusafont, repassa de manera crítica les controvèrsies sobre les relacions de parentiu entre els primats hominoïdeus extints i els representants actuals del mateix grup, que inclou els simis antropomorfs i els humans.Un artículo de revisión publicado en Journal of Human Evolution por Alessandro Urciuoli, investigador postdoctoral de la UAB, y David M. Alba, director del Institut Català de Paleontologia Miquel Crusafont, repasa de manera crítica las controversias sobre las relaciones de parentesco entre los primates hominoideos extintos y los representantes actuales del mismo grupo, que incluye los simios antropomorfos y los humanos
Socio-Economic Mechanisms to Coordinate the Internet of Services: The Simulation Environment SimIS
No full textVisions of 21st century information systems show highly specialized digital services and resources, which interact continuously and with a global reach. Especially with the emergence of technologies, such as the semantic web or software agents, intelligent services within these settings can be implemented, automatically communicating and negotiating over the Internet about digital resources without human intervention. Such environments will eventually realize the vision of an open and global Internet of Services (IoS). In this paper we present an agent-based simulation model and toolkit for the IoS: 'SimIS - Simulating an Internet of Services'. Employing SimIS, distributed management mechanisms and protocols can be investigated in a simulated IoS environment before their actual deployment.Multi-Agent Simulation, Internet, Simulation Tools
Lake mask and distance to land dataset of 2024 lakes for the European Space Agency Climate Change Initiative Lakes v2
No full textThis dataset contains the distance to land and the lake identifiers as a global netcdf file for all the water pixels at 1km (1/120 deg) lat/lon resolution of 2024 lakes distributed globally. It contains also the list of lakes as a csv file with information such as the lake center as defined in [1], and the coordinate of a box to easily locate the like in the global netcd file. The mask excludes islands on lakes and it has been derived from the GloboLakes high resolution limnology dataset [2]. The dateset have been further harmonized with the lake maximum extent lake polygons by PML [3]. The lake list with the plot of the mask and the polygons is available as a html file accessible also from the lake website at the University of Reading: http://www.laketemp.net/home_CCI/LMPolygons.php
This dataset accompanies the ESA CCI Lakes v2 dataset [4].
[1] Carrea, L.; Embury, O.; Merchant, C.J. (2015): High-resolution datasets related to in-land water for limnology and remote sensing applications: distance-to-land, distance-to-water, water-body identifier and lake-centre co-ordinates - Geoscience Data Journal, 2 (2). pp. 83-97. ISSN 2049-6060 doi: https://doi.org/10.1002/gdj3.32
[2] Carrea, L.; Embury, O.; Merchant, C.J. (2015): GloboLakes: high-resolution global limnology dataset v1. Centre for Environmental Data Analysis. doi:10.5285/6be871bc-9572-4345-bb9a-2c42d9d85ceb. http://dx.doi.org/10.5285/6be871bc-9572-4345-bb9a-2c42d9d85ceb
[3] Simis, S.; Mata, A.; Selmes, N.; Carrea, L. (2021) Lake polygons dataset accompanying Calimnos v1.4.0 and ESA CCI Lakes Climate Research Data Package v2.0. zenodo https://doi.org/10.5281/zenodo.4899250
[4] Carrea, L.; Crétaux, J.-F.; Liu, X.; Wu, Y.; Bergé-Nguyen, M.; Calmettes, B.; Duguay, C.; Jiang, D.; Merchant, C.J.; Mueller, D.; Selmes, N.; Simis, S.; Spyrakos, E.; Stelzer, K.; Warren, M.; Yesou, H.; Zhang, D. (2022): ESA Lakes Climate Change Initiative (Lakes_cci): Lake products, Version 2.0.1. NERC EDS Centre for Environmental Data Analysis https://catalogue.ceda.ac.uk/uuid/03c935c6890c4b2ebf4aae4d84cd947
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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