Results 61 to 70 of about 9,085,000 (214)

Signal propagation from portable active seismic source (PASS) to km‐scale borehole DAS for continuous monitoring of CO2 storage site

open access: yesGreenhouse Gases: Science and Technology, Volume 14, Issue 1, Page 4-10, February 2024.
Abstract We have developed a portable active seismic source (PASS) to monitor CO2 storage reservoirs at a depth of approximately 1 km. Despite its small size, stacking the signals generated by the PASS improves the signal‐to‐noise ratio of the seismometer data far from the source.
Takeshi Tsuji   +6 more
wiley   +1 more source

A parábola da Universidade: da disciplina da obediência à codificação da liberdade [PDF]

open access: yesREVISTA DE CIÊNCIAS DA EDUCAÇÃO, 2015
In the analysis of the transformative parable that has concerned the university, from the medieval foundation until now, and focused on the central events that have most determined them, i.e., the cultural and social-political changes that started with the rise of modernity (XVI century), have emerged with the spread of the Enlightenment and were ...
Gianfranco Petronio   +1 more
openaire   +2 more sources

Sensing Optical Fibers for Earthquake Source Characterization Using Raw DAS Records

open access: yesJournal of Geophysical Research: Solid Earth, Volume 129, Issue 1, January 2024.
Abstract Distributed Acoustic Sensing (DAS) is becoming a powerful tool for earthquake monitoring, providing continuous strain‐rate records of seismic events along fiber optic cables. However, the use of standard seismological techniques for earthquake source characterization requires the conversion of data in ground motion quantities. In this study we
Claudio Strumia   +5 more
wiley   +1 more source

Effect of Random Parameter Switching on Commensurate Fractional Order Chaotic Systems

open access: yes, 2016
The paper explores the effect of random parameter switching in a fractional order (FO) unified chaotic system which captures the dynamics of three popular sub-classes of chaotic systems i.e. Lorenz, Lu and Chen's family of attractors.
Das, Saptarshi   +2 more
core   +1 more source

Finite Temperature and Large Gauge Invariance [PDF]

open access: yes, 2000
We discuss the problem of large gauge invariance at finite temperature.Comment: Talk presented at the Second School on Field Theory and Gravitation in Vitoria, to be published in the ...
Das, Ashok
core   +5 more sources

Fractional Order Fuzzy Control of Nuclear Reactor Power with Thermal-Hydraulic Effects in the Presence of Random Network Induced Delay and Sensor Noise having Long Range Dependence

open access: yes, 2013
Nonlinear state space modeling of a nuclear reactor has been done for the purpose of controlling its global power in load following mode. The nonlinear state space model has been linearized at different percentage of reactor powers and a novel fractional
Das, Saptarshi   +2 more
core   +1 more source

Hemorragia subaracnóidea perimesencefálica não-aneurismática: apresentação de caso e revisão de literatura

open access: yesArquivos de Neuro-Psiquiatria, 1994
Os autores apresentam um caso de hemorragia subaracnóidea perimesencefálica não aneurismática em um paciente masculino de 42 anos, com excelente evolução clínica.
Mário H. Tsubouchi   +6 more
doaj   +1 more source

Neurocisticercose: diagnóstico tomográfico em pacientes neurológicos [PDF]

open access: yesArquivos de Neuro-Psiquiatria, 1998
Neurocisticercose (NC) é a parasitose mais comum do sistema nervoso central no nosso meio. Foram analisadas 3093 tomografias computadorizadas (TC) de 2554 pacientes neurológicos durante o período de um ano.
ANA P. NARATA   +6 more
doaj   +1 more source

Giant number fluctuations in microbial ecologies

open access: yes, 2012
Statistical fluctuations in population sizes of microbes may be quite large depending on the nature of their underlying stochastic dynamics. For example, the variance of the population size of a microbe undergoing a pure birth process with unlimited ...
Das, Dibyendu   +2 more
core   +1 more source

Analisis Kemampuan Resapan Air pada Perubahan Tata Guna Lahan di DAS Melawi Kabupaten Melawi

open access: yesJurnal Ilmu Lingkungan
Sub DAS Melawi mengalami peningkatan banjir setiap tahun akibat penurunan daerah resapan air yang disebabkan oleh perubahan tata guna lahan. Penelitian ini bertujuan untuk mengetahui perubahan tata guna lahan dan kemampuan resapan air di sub DAS Melawi ...
Yuni Arinata Putri Kelana   +3 more
doaj   +1 more source

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