cells
RSS cellsAnalysis of Radiation Effects on Individual DRAM Cells 2000 NSREC
White Paper A novel way to measure the radiation characteristics of DRAM memory cells is presented. Radiation exposure tends to drive retention times lower for cells. The change is retention time (the time period required for a cell to upset without refreshing... [24 Feb 2004]
Performance Modelling of GSM/GPRS Cells With Different Radio Resource Allocation Strategies
White Paper This paper presents an analytical model for the performance evaluation of GSM/GPRS cells with different resource allocation schemes. The presented model is based on the Modified Engset Model with a finite number of users generating ON/OFF sessions... [09 Nov 2005]
Stem Cells Can Become Embryos
White Paper The early embryo (up to 16 days post fertilization) is composed of cells, called blastomeres, which are considered to be totipotent, that is, capable in isolation and of forming a complete embryo. This capacity is due to a process called... [14 Aug 2003]
Asymptotic Behavior of a GPRS/EDGE Network With Several Cells Controlled by a Global Capacity Limit
White Paper This paper is a contribution to the generic problem of having simple and accurate models to dimension radio cells with data traffic on a GPRS or EDGE network. It addresses the issue of capacity limitation in a given cell due to coupling with other... [21 Nov 2005]
Toshiba nearer to using methanol fuel cells to power laptops
News But with the leading power technologies having only another 15 to 25 per cent room for improvement through chemistry, "fuel cells seem like the only promising technology for more efficient portable power source", Ozbek said. [06 Mar 2003]
ES Cells Make Neurons in a Dish
White Paper Mouse embryonic stem (ES) cells are valuable because of 3 fundamental properties. Second, ES cells replicate without limit. Unlike other cell lines, which have to be mutagenized or transformed by viruses to achieve indefinite replication, ES cells... [24 Feb 2004]
Smooth Handoff Scheme for Stream Media With Bandwidth Disparity in Wireless Cells
White Paper There are two main reasons that cause difficulties in the smooth transmission of stream media application during the user movement: packets may get lost due to the re-routing caused by handoffs; due to the disparity in the amount of available... [01 Aug 2007]
Load Balancing in Overlapping Wireless LAN Cells
White Paper This paper proposes a load-balancing scheme for overlapping wireless LAN cells. Agents running in each access point broadcast periodically the local load level via the Ethernet backbone and determine whether the access point is overloaded, balanced... [05 Dec 2007]
Methanol-powered laptops - how the cells work
News In PolyFuel's so-called eight molar methanol fuel cells, methanol, which ultimately provides the power, constitutes only 24 per cent of the fluid. The cells break down methanol molecules into protons, electrons and carbon dioxide. [07 Oct 2002]
Mobile phones switch off brain cells
News The Defence Evaluation and Research Agency (Dera) has found that mobile phones can switch off nerve cells in the brain's memory centre. The study, conducted on rats, found that the electromagnetic waves emitted by mobile phones deadened nerve cells... [17 Jul 1998]
Merge Cells or Combine Their Contents
White Paper For example, in case of several columns of information over which the user would like to spread one title, the user would merge cells to get that effect. Merging and combining are terms that have similar meanings, but in Excel, they are two... [05 Oct 2007]
Culture Conditions for Ex Vivo Expansion of Hematopoietic Primitive Cells
White Paper The clinical value of ex vivo expansion of hematopoietic stem cells (HSCs) might be to increase the number of mature cells or the number of primitive stem cells. HSC transplantation, indeed, requires expansion of all cellular subsets including... [24 Feb 2004]
Comparison of Propagation Models for Small Urban Cells in GSM 900 and 1 800
White Paper The purpose of the work presented in this paper is to compare propagation models for small urban cells in GSM 900 and 1 800, with the aim of testing their behaviour. With this objective in mind, a measurement campaign in co-operation with the... [17 Nov 2005]
Long-Term Engrafting Umbilical Cord Blood Cells Are Preserved after Ex Vivo Culture in Stroma-Free Culture
White Paper This article describes stroma-based and clinically applicable stroma-free cultures that maintain long-term engrafting umbilical cord blood (UCB) cells for at least 14 days ex vivo. UCB CD34+ cells were cultured in transwells above [24 Feb 2004]
Real-Time Linux Dynamic Clamp: A Fast and Flexible Way to Construct Virtual Ion Channels in Living Cells
White Paper This device, based around the Real-Time Linux operating system, was tested specifically in the context of dynamic clamping, a demanding real-time task in which a computational system mimics the effects of nonlinear membrane conductances in living... [18 Apr 2007]
