Article history: Received 23 December 2009 Received in revised form 10 June 2010 Accepted 10 June 2010 Available online 16 July 2010

in order to study the role of photosynthetic tissues on grain filling and remobilization of stem reserves under terminal drought, a pot experiment as semi-field was conducted as two-factor factorial in complete randomized design with three replicates at research farm of agriculture college of vali – e – asr university of rafsanjan during january to june 2012 . first factor was source strength r...

Sinking is part of diatom life history. Typically, by the end a bloom, diatoms form aggregates that sink rapidly to bottom. This opportunistic lifestyle can be considered an adaptation reduce predation losses, because pressure in sediment less than water column. In this study, we demonstrate two out six examined become sticky and coagulate into when exposed chemical copepod cues. Cell stickines...

We consider the problem of maximizing the lifetime of a wireless sensor network with a mobile sink. The sink travels at finite speed among a subset of possible sink locations to collect data from a stationary set of sensor nodes. The problem we consider chooses a subset of sink locations for the sink to visit, finds a tour for the sink among the selected sink locations, and prescribes an optima...

The book is not just another " pep talk " on The Kitchen Sink and How to Learn to Like It. Its stated purpose is "to discuss how the ingrained ideas which we have inherited, affect us, as women to-day, and to try to decide whether a woman ought to try to adapt herself to them, or whether it is the old pattern that wants adapting". It seems to be directed mainly to the wife and mother of young a...

Use of mobile devices for data collection in wireless sensor networks (WSNs) has recently drawn much attention. Controlled sink mobility has been shown to be beneficial in energy conservation and lifetime prolongation. In this paper, we propose a multi-hop uneven hierarchical routing protocol (MUHRP) using a controlled mobile sink. We first analyze the performance of MUHRP with a fixed sink nod...

Habitat sinks can attract dispersing animals if high mortality or breeding failure are difficult to detect (e.g., when due to human hunting or pollution). Using a simple deterministic model, we explore the dynamics of such source-sink systems considering three scenarios: an avoided sink, no habitat preference, and an attractive sink. In the second two scenarios, there is a threshold proportion ...

1. Species often compete for breeding sites in heterogeneous landscapes consisting of sources and sinks. To understand how the presence or absence of sink breeding sites influence ecological outcomes, we extend Pulliam’s source–sink model to competing species. 2. In a homogeneous landscape consisting of source sites, we prove that one species, the ‘superior’ competitor, competitively excludes t...