3,193 research outputs found
Cosmological Implications of the Tetron Model of Elementary Particles
Based on a possible solution to the tetron spin problem, a modification of
the standard Big Bang scenario is suggested, where the advent of a spacetime
manifold is connected to the appearance of tetronic bound states. The metric
tensor is constructed from tetron constituents and the reason for cosmic
inflation is elucidated. Furthermore, there are natural dark matter candidates
in the tetron model. The ratio of ordinary to dark matter in the universe is
calculated to be 1:5.Comment: 23 page
I want one like pa had yesterday
Gift of Dr. Mary Jane Esplen.Piano vocal [instrumentation]Willie's mother said [first line]I want one like pa had yesterday [first line of chorus]C [key]Marcia [tempo]Popular song [form/genre]Woman holding umbrella [illustration][Loupiant Lampe] [graphic artist]Publisher's advertisement on inside front and back cover [note
MOD-0A 200 kW wind turbine generator design and analysis report
The design, analysis, and initial performance of the MOD-OA 200 kW wind turbine generator at Clayton, NM is documented. The MOD-OA was designed and built to obtain operation and performance data and experience in utility environments. The project requirements, approach, system description, design requirements, design, analysis, system tests, installation, safety considerations, failure modes and effects analysis, data acquisition, and initial performance for the wind turbine are discussed. The design and analysis of the rotor, drive train, nacelle equipment, yaw drive mechanism and brake, tower, foundation, electricl system, and control systems are presented. The rotor includes the blades, hub, and pitch change mechanism. The drive train includes the low speed shaft, speed increaser, high speed shaft, and rotor brake. The electrical system includes the generator, switchgear, transformer, and utility connection. The control systems are the blade pitch, yaw, and generator control, and the safety system. Manual, automatic, and remote control are discussed. Systems analyses on dynamic loads and fatigue are presented
The MOD-OA 200 kilowatt wind turbine generator design and analysis report
The project requirements, approach, system description, design requirements, design, analysis, system tests, installation safety considerations, failure modes and effects analysis, data acquisition, and initial performance for the MOD-OA 200 kw wind turbine generator are discussed. The components, the rotor, driven train, nacelle equipment, yaw drive mechanism and brake, tower, foundation, electrical system, and control systems are presented. The rotor includes the blades, hub and pitch change mechanism. The drive train includes the low speed shaft, speed increaser, high speed shaft, and rotor brake. The electrical system includes the generator, switchgear, transformer, and utility connection. The control systems are the blade pitch, yaw, and generator control, and the safety system. Manual, automatic, and remote control and Dynamic loads and fatigue are analyzed
`The dragon breathes smoke': cigarette counterfeiting in the People's Republic of China
This article aims at providing an account of the social organization of the cigarette counterfeiting business in the People's Republic of China—a business that has been feeding the cigarette black markets around the globe. Specifically, we aim to exhibit the scale and nature of cigarette counterfeiting in mainland China, describe the practices and actors in the different phases of the trade, and examine the role of corruption and violence in the particular business. We argue that cigarette counterfeiting is one of the side effects of China's reform and ‘opening up’ policy, and a feature of the country's economic development process
Prevalence of recreational drug use is indiscriminate across antiretroviral regimens of differing drug-drug interactions among MSM.
Ratings Use in an Online Discussion System: The Slashdot Case
Large-scale, online communication systems allow many-to-many interactions among users, which can result in a variety of positive outcomes. However, the prevalence of information overload and problems caused by the loss of shared communication channels in text-based environments may create barriers to realizing the benefits of online interactions. Attempts to manage online communication systems in the past depended on techniques that cannot be applied to, or do not allow, large-scale interactions.
Slashdot is a large-scale, long-lasting Web discussion community that uses a form of recommendation system to provide feedback about the quality of comments users post to the site. This dissertation examines this novel approach to organizing an online communication system in terms of how users employ the ratings provided by the system, whether comment ratings have an effect on how new users of the site participate, and how users making recommendations about content actually provide ratings.
I find that users do employ ratings to change how they view content, but that there is some resistance that prevents them from doing so readily. To overcome this friction, I recommend dynamic changes based on the choices of other users who seem more willing to make interface changes based on comment ratings. I also find that new user participation on Slashdot is affected by feedback on the initial comment made by the new member, but that user observation is just as important in determining how the new member will participate in the future. Finally, I find that ratings are being sufficiently applied to comments, but that some comments are not receiving fair attention because of when or where they are posted within the online discussion.
The overall conclusions of this work are that pre-rating content helps to relieve the pressure of attaining sufficient ratings on comments, that rating labels provide valuable feedback for customizing how users with different motivations may read comments, and that comments ratings positively affect user experiences in a large, online discussion system. The Slashdot case shows how the use of recommendations in an online discussion system creates organization that ameliorates the problems of information overload and loss of communication channels, while still allowing for large-scale, heterogeneous interactions.Ph.D.InformationUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/39369/2/lampe_diss_revised.pd
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