Imagine your worst fear. A fear that eats away at you - fear of death, of illness, of needles, of fire. Even of feelings. The people who live in Roxton know what it's like to live like that. But they have no choice. Emma Tate had lived with her fear of losing everything for more than two years. Her job is in jeopardy, her parents have been killed in a car crash, her life is collapsing around her. She, her husband and two friends attempt to seek peace in a luxury house in the countryside close to Roxton for two weeks. But the village of Roxton LIKES fear - it has a force within it which needs fear to sustain it and help it grow. And Emma and her companions cannot avoid becoming fearful... For Emma and the others there will be no waking from THIS nightmare...
Introduces Twisted, the networking framework written in Python, looking at its core components and describing how to construct HTTP servers, develop flexible web clients, access databases, and add common server components.
Author : Michael Maus
ISBN : 1581120303
Genre : Technology & Engineering
File Size : 32.41 MB
Format : PDF
Download : 428
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This study is focused on the effects of photoinduced intramolecular charge transfer (CT) in three differently twisted donor-acceptor (D-A) biphenyls. Taking into account a further pair of differently twisted D-A biaryls new universal insights into the photoinduced electronic & conformation dynamics of D-A biaryls are obtained. Furthermore, possible applications in fields of solar energy conversion & fluorescence sensing of microenvironments are demonstrated. Experimental means of stationary & time-resolved (ps to s) luminescence, transient absorption (sub-ps), polarization spectroscopy, high pressure & low temperature techniques are employed in conjunction with quantum chemical calculations. Twist angle & solvent dependent electron transfer (ET) interactions between the D & A aryl moieties are responsible for the low lying & solvatochromic intramolecular CT electron band which gains unusually high intensity through strong electronic coupling of the pure 1ET with the ground (S0) & 1La state. As regards the class of biaryl compounds, for the first time, an excited state electron transfer from the D to the A could be monitored by dual spectrally separated stimulated fluorescence bands with precursor-successor relationship on a sub-ps timescale for the D-A biphenyls. It is concluded that, in addition to the electronic interaction of 1ET with S0 & 1La, the electronic interaction with a close lying 1Lb state plays a fundamental role in the ET dynamics & the 1CT-S0 transition probability in D-A biaryls. The initial photoinduced conformational relaxation occurs towards planarity in all biaryls investigated. However, various results evidence that the highly twisted D-A biphenyl additionally performs a slow "excited state intramolecular back twist rotation" leading to a solvent polarity dependent conformational equilibrium between a more planar (CT) & a more twisted (CTR) conformer in S1(1CT). Using global analysis of the biexponential fluorescence decays as a function of temperature & pressure in medium polar solvents, the kinetics, thermodynamics, viscosity control & decomposed emission spectra associated with this adiabatic photoreaction are determined. The twist angle dependent ability of the D-A biphenyls to serve as fluorescent probes of micropolarity, changes of microviscosity or matrix order, protic solvents & pH is investigated. In particular, fluorescence sensing of pH seems to be promising. The advantageous property of planar or moderately twisted D-A biaryls to combine high fluorescence quantum yields with large Stokes-shifts is proposed for the use in fluorescent solar concentrators. Alternatively, almost full charge separation in S1 of strongly twisted D-A biaryls provides the possibility of electron transfer initiated photocatalysis.
Twisted Network Programming Essentials from O'Reilly is a task-oriented look at this new open source, Python-based technology. The book begins with recommendations for various plug-ins and add-ons to enhance the basic package as installed. It then details Twisted's collection simple network protocols, and helper utilities. The book also includes projects that let you try out the Twisted framework for yourself. For example, you'll find examples of using Twisted to build web services applications using the REST architecture, using XML-RPC, and using SOAP. Written for developers who want to start building applications using Twisted, this comprehensive guide presents examples of the most common tasks you'll face when building network applications. It also helps you understand the key concepts and design patterns used in Twisted applications. Here are just some of the topics discussed in Twisted Network Programming Essentials: Installing Twisted How to make TCP connections How to use Twisted to work with the Web Twisted's authentication framework Usenet and SSH clients and servers Along the way, each lesson is supported by thorough notes and explanations to make absolutely certain you're up to speed with this leading-edge Python technology.
ISBN : 0803298536
Genre : History
File Size : 29.66 MB
Format : PDF, Kindle
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A celebrated triumph of historiography, Rockdale tells the story of the Industrial Revolution as it was experienced by the men, women, and children of the cotton-manufacturing town of Rockdale, Pennsylvania. The lives of workers, managers, inventors, owners, and entrepreneurs are brilliantly illuminated by Anthony F. C. Wallace, who also describes the complex technology that governed all of Rockdale?s townspeople. Wallace examines the new relationships between employer and employee as work and workers moved out of the fields into the closed-in world of the spinning mule, the power loom, and the mill office. He brings to light the impassioned battle for the soul of the mill worker, a struggle between the exponents of the Enlightenment and Utopian Socialism, on the one hand, and, on the other, the ultimately triumphant champions of evangelical Christianity.