Stereo spreader REVIEW

A stereo spreader is a very useful tool when trying to blend sounds of the same or similar frequency content and make them appear as if they where spread through the left and right speakers. The spreader function that is going to be described in this paper will vary a signals time and pitch characteristics resulting in a stereo spread signal, it is going to point the problems the code may have and how it can be improved.Architecture & Allied Art

Stereo Spreader

The spreader_mod function spreads a mono audio signal though the stereo image summing the dry original signal with a combination of delay and pitch shift which are independently applied to the left and right channels.Architecture & Allied Art

Practical details of mine surveying in certain mines of Northern Mexico

The name of this thesis is suggestive of its character. The writer has endeavored to resent in a general way some of the most important details of mine surveying as he has found them in actual practice. For the sake of uniformity the engineering staff in which he worked prepared a set of instructions to be used by the engineers at the various mines. The methods and illustrations described in this paper have been adapted from these instructions and they afford a thorough foundation ready to receive the minor details best adapted to each particular mining district --Foreword, page ii

The construction, equipment and operation of the second largest oil refinery in Mexico

In the preparation of this thesis the writer has endeavored to describe in a clear, concise and simple manner the general scheme carried out by the Foundation Company in the construction, equipment and operation of the Corona Refinery at Chijol, Veracruz, Mexico. Under construction, the most interesting features of the work executed by the Field Engineering department have been discussed at some length. Throughout this paper elementary details have been omitted, the casual reader being assumed to possess a knowledge of the fundamental principles of engineering. No attempt has been made to cover the activities of the allied--mechanical, electrical, architectural--departments of engineering as no single individual in the organization could hope to have the time nor the opportunity to become sufficiently acquainted with all their details of operation to describe them in a comprehensive manner. The illustrations accompanying this paper have been carefully prepared and are intended as a supplement to the subject matter; it is hoped that they will be found helpful in making the text clear --Preface, page ii

Arturo Fernandez-Gilbert TSSA Fall 2010

Enhances faculty\u27s teaching by attending a conference devoted to university teaching, a high-impact practice, evidence-based practice or a newly developing teaching practice

Thermodynamic and economic considerations for low-temperature electrochemical nitrogen fixation technologies

The continuous and rapid expansion of society has created increasing stress in global resources such as water, nutrients, and minerals. The development of technologies that aid in the industrialized production of these resources has been of growing importance for nearly a century. In modern history, thermocatalytic processes have been a pillar for the centralized production of fuels, chemicals, and fertilizers. The fertilizer industry relies on a thermochemical process, the Haber-Bosch process, to produce around 150 million tons of ammonia per year at an efficiency of up to 70 %. However, this process utilizes high temperatures (700K) and pressures (100bar) to achieve high production rates and designed catalysts to achieve high product selectivity. These elevated operating conditions mean that the Haber-Bosch process is only economically viable on the production scale of thousands of metric tons per day. Furthermore, due to the Haber-Bosch process reliance on fossil fuels, the production of ammonia accounts for 2% of the total global energy consumption and 1.2% of greenhouse gas emissions worldwide. Growing concerns regarding the environmental impact of the Haber-Bosch process have encouraged the development of alternative technologies for renewable ammonia. The electrochemical production of ammonia from water and air at near ambient conditions using renewable energy is a possible solution to reduce the CO2 footprint of the fertilizer industry. According to the Department of Energy (DOE), electrochemical technologies for carbon-neutral fuel production have to achieve energy efficiencies higher than 60% while operating at current densities above 300 mA/cm2 to meet viability requirements. These analyses provide general targets for electrochemical fuels. However, a specific techno-economic analysis for electrochemical nitrogen reduction will yield more accurate performance targets. As economic considerations drive technology adoption, a more accurate representation of the practicality of low-temperature electrochemical ammonia synthesis is the levelized cost of the ammonia (LCOA). Furthermore, there is a growing need to connect cost to system properties, such as operating temperature and pressure and catalyst activity and selectivity. These models ultimately may better guide the direction of future research in electrochemical nitrogen fixation and speed the advancement of useful electrochemical technologies. Herein, we present a techno-economic model to evaluate the feasibility of electrochemical ammonia synthesis technologies. The model integrates electrochemical, thermodynamic, and cost analyses to predict price targets based on the catalyst and system properties. Finally, we outline a path to improve the performance of the electrochemical system to reach Haber-Bosch parity.M.S

Investigation on the Damage Localization in a Pipe Using Torsional Guided Waves and Sensor Array Reconstruction Techniques

Continuous monitoring for damage detection and localization on large fluid filled pipe-like structures is needed. To address this problem we propose the use of a Macro Fiber Composite (MFC) sensor to generate the first order torsional mode and to detect scatter signals from the discontinuities by an EMAT sensor positioned in various locations on the surface of the structure to simulate an array of sensors. Signals are post-processed with a developed algorithm based on entropy and arrival time. Numerical results were obtained for simulated signals and experimentally tested on a stainless steel pipe A-36 (43.6 and 48.2 mm in inner and outer diameter respectively). It was found that it is possible to locate an artificial defect by identifying the torsional modes and incorporating this information in the developed entropy algorithm of the simulated sensor array