نتایج جستجو برای: laboratory compaction

تعداد نتایج: 289742  

1996
R. Bevacqua L. Guerrazzi F. Ferrandi F. Fummi

Test pattern storage is an important problem aaect-ing all Design for Testability (DfT) techniques based on scan-path. Test compaction is the key idea to reduce this problem, but in case of partial-scan test compaction would concern the concatenation and overlapping of test sequences instead of test vectors. Unfortunately, standard sequential TPGs do not show suucient capabilities in test seque...

Journal: :SIAM Journal of Applied Mathematics 2011
Stephen Peppin Apala Majumdar Robert Style Graham Sander

We develop a mathematical model of frost heave in colloidal soils. The theory accounts for heave and consolidation, while not requiring a frozen fringe assumption. Two solidification regimes occur: a compaction regime in which the soil consolidates to accommodate the ice lenses, and a heave regime during which liquid is sucked into the consolidated soil from an external reservoir, and the added...

Journal: :Bulletin of Volcanology 2021

Abstract The microstructure and mineralogy of volcanic rocks is varied complex, their mechanical behaviour similarly complex. This review summarises recent developments in our understanding the failure modes rocks. Compiled data show that, although porosity exerts a first-order influence on uniaxial compressive strength rocks, parameters such as partitioning void space (pores microcracks), pore...

Journal: :Physical review letters 2007
Nicolas Taberlet Stephen W Morris Jim N McElwaine

We report laboratory experiments on rippled granular surfaces formed under rolling wheels. Ripples appear above a critical speed and drift slowly in the driving direction. Ripples coarsen as they saturate and exhibit ripple creation and destruction events. All of these effects are captured qualitatively by 2D soft-particle simulations in which a disk rolls over smaller disks in a periodic box. ...

2004
John W. Rudnicki

[1] Conditions for shear and compaction localization are examined for stress states on an elliptic yield cap in the space of Mises equivalent shear stress t and mean normal compressive stress s. Localization is predicted to occur when the slope of the hydrostatic stress versus inelastic volume strain curve falls to a critical value kcrit. When applied to the standard triaxial test, the analysis...

1999
Gunnar W. Klau Petra Mutzel

We consider the two{dimensional compaction problem for orthogonal grid drawings in which the task is to alter the coordinates of the vertices and edge segments while preserving the shape of the drawing so that the total edge length is minimized. The problem is closely related to two{dimensional compaction in vlsi{design and is conjectured to be NP{hard. We characterize the set of feasible solut...

2017
Jorine M Eeftens Shveta Bisht Jacob Kerssemakers Marc Kschonsak Christian H Haering Cees Dekker

Condensin, a conserved member of the SMC protein family of ring-shaped multi-subunit protein complexes, is essential for structuring and compacting chromosomes. Despite its key role, its molecular mechanism has remained largely unknown. Here, we employ single-molecule magnetic tweezers to measure, in real time, the compaction of individual DNA molecules by the budding yeast condensin complex. W...

Journal: :IEEE Trans. Parallel Distrib. Syst. 1998
Nian-Feng Tzeng Hsing-Lung Chen

Compaction relocates active subcubes in a fragmented hypercube so as to produce a contiguous free region and eliminate the adverse impact of fragmentation on performance. The overhead of compaction is often contributed primarily by task migration, which makes use of disjoint paths for transmitting migrated data. Since task migration usually involves transmitting a large amount of data, the time...

1997
Ahmet Kirac P. P. Vaidyanathan

Energy compaction has proven to be an essential concept in signal-adapted data compression. In particular, optimization of orthonormal subband coders for a given power spectrum directly leads to optimal energy compaction lters. In this paper, we consider some new design methods and properties of optimal FIR energy compaction lters. In particular , we propose a very eecient method called the win...

1999
A. Hammami P. Nilsson

The compaction behavior of dry reinforcements has been the subject of much previous research work. However the research was mainly carried out for the Resin Transfer Molding (RTM) process where the compaction pressure goes up to 1 MPa, and higher compaction rates are involved. In the vacuum infusion molding process, the available compaction pressure never exceeds 1 bar. Accordingly, the analyti...

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