نتایج جستجو برای: filled pore space and similar water

تعداد نتایج: 17016007  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ولی عصر (عج) - رفسنجان - دانشکده ریاضی 1392

let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...

1999

‘‘Peepers’’ (dialysis samplers) rely on exchange across a dialysis membrane between fluid-filled cells and the surrounding sediment in order to sample the pore water at various depths. In the current study, we show that under some realistic circumstances, where there is a large density difference between the pore water and the cell fluid in permeable sediments, the resulting convective motion i...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1376

in chapter 1, charactrizations of fragmentability, which are obtained by namioka (37), ribarska (45) and kenderov-moors (32), are given. also the connection between fragmentability and its variants and other topics in banach spaces such as analytic space, the radone-nikodym property, differentiability of convex functions, kadec renorming are discussed. in chapter 2, we use game characterization...

Journal: :فیزیک زمین و فضا 0
پریسا حجت نیا دانش آموخته کارشناسی ارشد ژئوفیزیک (لرزه شناسی)، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران محمدعلی ریاحی دانشیار، گروه فیزیک زمین، مؤسسه ژئوفیزیک دانشگاه تهران، ایران

pore pressure is an important parameter, in exploration and production of hydrocarbon resources. lack of accurate knowledge about pore pressure, before drilling phase, leads to serious dangers in drilling process. accurate knowledge about distribution of pore pressure in a field, leads to reduce risks in drilling, improve well planning and mud weight calculations. during burial, normally pressu...

پایان نامه :دانشگاه آزاد اسلامی واحد کرمانشاه - دانشکده زبانهای خارجی 1393

previous studies regarding teachers’ beliefs have revealed that teachers’ beliefs have influence on their classroom practices. the current study aimed to investigate the effect of teachers’ beliefs about teaching reading strategies on students’ motivation and success in reading comprehension in the context of english teaching as a foreign language in high schools of mazandaran, iran. data were ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1392

‎in this article‎, ‎we have focused one some basic and productive information about the properties of spectrum and singular values related to compact operators which are ideals in a c*-algebra of bounded operators‎. ‎considering a two-sided connection between the family of symmetric gauge functions on sequence of singular values of compact operators and symmetric norms on finite dimensional ope...

2002
W. D. NETTLETON

Several contrasting uses of the terms macro(large) and micro(small) pore can be identified in soil science literature. In some cases macropores are (i) considered to be pores > 15 (Marshall, 1959) or 100 /im in diam (Bouma et al., 1977) or (ii) implied to be even larger when described in terms of wormholes (Ehlers, 1975), root channels (Aubertin, 1971). and shrinkage cracks (Lewis, 1977). The s...

Journal: :Soil 2021

Abstract. The active fraction of soil organic carbon is an important component health and often quickly assessed as the pulse CO2 released by re-wetting dried soils in short-term (24–72 h) assays. However, can lose (C) they dry and, if samples vary moisture content at sampling, differential C loss during pre-assay dry-down period may complicate assay's interpretations. We examined impact a long...

2010
M. G. Cortina-Januchs J. Quintanilla-Dominguez A. Vega-Corona A. M. Tarquis

Biogeosciences Discussions This discussion paper is/has been under review for the journal Biogeosciences (BG). Please refer to the corresponding final paper in BG if available. Abstract Computed Tomography (CT) images provide a non-invasive alternative for observing soil structures, particularly pore space. Pore space in soil data indicates empty or free space in the sense that no material is p...

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