Recent studies have shown that homologous recombination (HR) requires chromatin repression as well as relaxation at DNA double strand breaks (DSBs). HP1 and SUV39H1/2 are repressive factors essential for HR. Here, we identify SETDB1 as an additional compacting factor promoting HR. Depletion of HP1, SUV39, SETDB1 or BRCA1 confer identical phenotypes. The repressive factors, like BRCA1, are dispe...

This paper concerns the problem of implementation of a multi-segment virtual memory with the number of segments variable in time on a memory consisting of one fixed size segment. The segments can differ in size but the size of each segment is invariable in time. For such a memory the following operations are defined: _ creating a segment of a given size, ~ removing an indicated segment, _ addre...

Concrete is a material that often used in the construction industry due to its strong compressive strength and durability. Currently, lot of research being done find new ways increase performance. One these ideas what led creation self-compacting. accepted as most cutting-edge development concrete building industry. Self-Compacting becoming more popular for usage overloaded reinforced construct...

1. Introduction Traditional batch garbage collection techniques lead to long delays in the programming execution. Different methods to reduce the delays have been suggested. These methods can be divided into two classes: those intended to give acceptable pauses in interactive programs (programs that interact with a user), and those intended for real-time programs. In an interactive program, it ...

This paper presents the results of an experimental research on the workability and mechanical properties of self-compacting concrete. The work focused on concrete mixes having Water/Cement ratios of 0.23, 0.24, 0.25, 0.26 and 0.27, with a Packing Factor of 1.12. The Concrete mixes contains different proportions of GGBS, Super plasticizers, water binder ratios and constant proportions of Cement,...

Warm compaction takes advantage of temperature to favor densification during compaction. However, this technique requires powder mixes with specific physical characteristics to be adequately processed in the temperature range involved in warm pressing. The mix formulation, especially the lubricant/binder system, should provide good flowability and compressibility and lubrication of the die wall...

In addition to vertical time shifts commonly observed in time-lapse seismic images, horizontal displacements are apparent as well. These apparent horizontal displacements may be small relatively to seismic wavelengths, perhaps only 5 m at depths of 5 km, but they consistently suggest an outward lateral expansion of images away from a compacting reservoir. It is well known that apparent vertical...

In this paper we present the results of repeated feature-based compaction applied as a part of DUC 2004 task 1 – 75-byte short summary, on a set of printed news stories. We report the performance of a system built using tf*idf and namedentities as the main features employed to retain the most relevant parts of text, while compacting it. Multiple stages of the compaction, whilst arriving at the ...

Relative performance of the back propagation neural network (BPN) algorithm combined with genetic algorithm (GA) approach for the prediction/optimization of the properties of yarn produced on jet ring spinning system has been studied. Yarn samples of various linear densities have been produced on ring spinning machines using air-jet nozzles as retrofit by varying the nozzle parameter and the ya...

The excellent properties of Ti have resulted in its generalised use for bone implants. However, Ti is very stiff in comparison with human cortical bone, and this creates problems of bone weakening and loosening of the implant. This article discusses the mechanical properties (flexural and compressive strength, and stiffness) of porous Ti–6Al–4V specimens developed using the space holder method....