Phase transitions in Paradigm models

In this letter we propose two general models for paradigm shift, deterministic propagation model (DM) and stochastic propagation model (SM). By defining the order parameter $m$ based on the diversity of ideas, $\Delta$, we study when and how the transition occurs as a cost $C$ in DM or an innovation probability $\alpha$ in SM increases. In addition, we also investigate how the propagation processes affect on the transition nature. From the analytical calculations and numerical simulations $m$ is shown to satisfy the scaling relation $m=1-f(C/N)$ for DM with the number of agents $N$. In contrast, $m$ in SM scales as $m=1-f(\alpha^a N)$.Comment: 5 pages, 3 figure

Quantifying discrepancies in opinion spectra from online and offline networks

Online social media such as Twitter are widely used for mining public opinions and sentiments on various issues and topics. The sheer volume of the data generated and the eager adoption by the online-savvy public are helping to raise the profile of online media as a convenient source of news and public opinions on social and political issues as well. Due to the uncontrollable biases in the population who heavily use the media, however, it is often difficult to measure how accurately the online sphere reflects the offline world at large, undermining the usefulness of online media. One way of identifying and overcoming the online-offline discrepancies is to apply a common analytical and modeling framework to comparable data sets from online and offline sources and cross-analyzing the patterns found therein. In this paper we study the political spectra constructed from Twitter and from legislators' voting records as an example to demonstrate the potential limits of online media as the source for accurate public opinion mining.Comment: 10 pages, 4 figure

Synchronization of R{\"o}ssler Oscillators on Scale-free Topologies

We study the synchronization of R{\"o}ssler oscillators as prototype of chaotic systems, when they are coupled on scale-free complex networks. We find that the underlying topology crucially affects the global synchronization properties. Especially, we show that the existence of loops facilitates the synchronizability of the system, whereas R\"ossler oscillators do not synchronize on tree-like topologies beyond a certain size. By considering Cayley trees, modified by various shortcuts, we find that also the distribution of shortest path lengths between two oscillators plays an important role for the global synchronization.Comment: 6 pages, 7 figure

Selayang Hospital Project

The planning of Selayang Hospital started in 1996, a proposed 960-bedded hospital located on a 15.8 hectare site along the Kepong Selayang road, within the Majlis Perbandaran of Selayang of Gombak District in the state of Selangor. Selayang Hospital (SH) is a government - owned ultra - modern hospital in the country. It has sophistication of a luxury private medical center with state - of - the -art technology. It is one of the hospitals built under the Seventh Malaysia Plan (7th MP) to reduce congestion at the Kuala Lumpur Hospital (KLH). Health Minister Dato' Chua lui Meng, (Viswanathan, 1998), said that the reasons for building this 960-bedded hospital is because the Ministry of Health (MOH) had for a longtime realized that the KLH was too much overcrowded with patients. Physically the KLH was already bursting to its limits with staff overworked, quality of patient care compromised and as a result patient's dissatisfaction and complaints. Proper documentation on archives was not available with many patients' records mislaid or missing. This had resulted on many lost cases for the KLH in legal matters. It was with the above background that the MOH came up with SHP, with its modern IT setting

Self-optimized Coverage Coordination in Femtocell Networks

This paper proposes a self-optimized coverage coordination scheme for two-tier femtocell networks, in which a femtocell base station adjusts the transmit power based on the statistics of the signal and the interference power that is measured at a femtocell downlink. Furthermore, an analytic expression is derived for the coverage leakage probability that a femtocell coverage area leaks into an outdoor macrocell. The coverage analysis is verified by simulation, which shows that the proposed scheme provides sufficient indoor femtocell coverage and that the femtocell coverage does not leak into an outdoor macrocell.Comment: 16 pages, 5 figure