Engineering Commons^™

Capillary Instability In Nanoimprinted Polymer Films, Kyle J. Alvine, Yifu Ding, Jack F. Douglas, Hyun Wook Ro, Brian C. Ockerberg, Alamgir Karim, Christopher L. Soles

Alamgir Karim

Capillary forces play an active role in defining the equilibrium structure of nanoscale patterns. This effect can be especially pronounced in soft materials such as polymers near or above their glass transition temperature (Tg) where material flow is possible. In these situations, the effect of surface tension can produce varied and complex capillary instabilities, even in relatively simple geometries such as parallel-line-space grating patterns. Here we investigate a novel capillary instability that arises upon thermal annealing of nanoimprinted polystyrene line-space gratings with an underlying residual layer. This novel instability is characterized by the development of lateral undulations of the lines, …

Developing Software Engineering Leaders At Carnegie Mellon Silicon Valley, Ray Bareiss, Todd Sedano

Todd Sedano

The Carnegie Mellon’s Silicon Valley Campus offers a master’s degree in Software Engineering, with technical and development management tracks, targeted at working software professionals in Silicon Valley. We believe the program to be unique in that it is entirely team-based and project-centered. Students learn by doing as they are coached just in time by faculty in the context of their work on authentic projects, and they are evaluated based on what they produce. In response to our interactions with an industry characterized by innovation and short project development timelines, the program evolved from one focused on “high ceremony” processes to …

Network Flow Formulation Of Optimal Perimeter Sensory Coverage Problem, Davood Golmohammadi Phd

Davood Golmohammadi

No abstract provided.

Building A Business On Open Source Software, Tony Wasserman

Tony Wasserman

For many years, free and open source software was exclusively associated with the research community, in contrast to the closed source products developed by commercial software vendors. Over the past decade, there has been a vast increase in the availability of open source software, growing from such projects as Linux and Apache. Open source software is being widely adopted in industry, which has led to numerous business opportunities for entrepreneurs and vendors. This activity is having a disruptive effect on the software industry that has affected even the largest software vendors. This paper describes the emergence of open source business, …

Solar Photovoltaic Energy For Mitigation Of Climate Change: A Catalytic Application Of Catholic Social Thought, Joshua M. Pearce, Anna L. Santini, Jennifer M. Desilva

Joshua M. Pearce

Assessment Of The Impact Of The European Co2 Emissions Trading Scheme On The Portuguese Chemical Industry, João F. Gomes

João F Gomes

No abstract provided.

Surface Structure Changes In Cement Paste Exposed To 10.6 Um Laser Radiation, Juan José Soto-Bernal, María Del Rosario Moreno-Virgen, Claudio Frausto-Reyes, Adrian Bonilla-Petriciolet, José Vega-Duran, José Pineda-Piñon, José Ortíz-Lozano

Adrian Bonilla-Petriciolet

We report the changes occurring in cement pastes irradiated by 10.6um CO2 laser at different stages of hydration. Raman spectroscopy, X-rays and Scanning Electronic Microscopy (SEM) techniques had been used to observe molecular structural changes. Intensity of cement paste Raman peaks after laser irradiation was monitored in samples irradiated 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 days after their preparation. Applied laser power changed Raman peaks intensity at 187.5cm-1, 563cm-1, 695cm-1, 750cm-1, 897cm-1, 1042cm-1 and 1159cm-1 that corresponds to compounds already presents in cement pastes. X ray diffraction and SEM images confirm the recrystalization of cement …

Effects Of Annealing Treatment On Optical Properties Of Anatase Tio 2 Thin Films

A.S. Md Abdul Haseeb

In this investigation, anatase TiO 2 thin films were grown by radio frequency magnetron sputtering on glass substrates at a high sputtering pressure and room temperature. The anatase films were then annealed at 300-600 °C in air for a period of 1 hour. To examine the structure and morphology of the films, X-ray diffraction (XRD) and atomic force microscopy (AFM) methods were used respectively. From X-ray diffraction patterns of the TiO 2 films, it was found that the as-deposited film showed some differences compared with the annealed films and the intensities of the peaks of the crystalline phase increased with …

Vlsi Implementation Of High Resolution High Speed Low Latency Pipeline Floating Point Adder/Subtractor For Fft Applications, Rozita Teymourzadeh, Burhan Yeop Majlis, Mok Vh, Masuri Othman

Dr. Rozita Teymourzadeh, CEng.

Suchy System Oczyszczania Spalin Ze Spalania Odpadów Niebezpiecznych – Ocena Skuteczności Usuwania Substancji Gazowych I Możliwości Spełniania Standardów Emisyjnych, Robert Oleniacz

Robert Oleniacz

The research object was a medical waste incineration plant with a flue-gas treatment system based on dry sorption agent injection to combustion gases before a high-efficiency particulate collector. A combustion system was consisted with the fluidized bed reactor (starved air gasifier) and the secondary combustion chamber. As the dry absorbent was used a mixture of high reactive hydrated lime and activated carbon. Activated carbon content in the mixture was 5-10 % by mass. The absorbent was injected in the minimal recommended amount (4-5 kg/h). Applied collector was a ceramic filter with total filtration area of 120 m2 and guaranteed outlet …

A Study On Thermal Combustion Of Lean Methane–Air Mixtures: Simplified Reaction Mechanism And Kinetic Equations, Krzysztof Gosiewski, Anna Pawlaczyk, Krzysztof Warmuzinski, Manfred Jaschik

Krzysztof Gosiewski

Homogeneous combustion of lean methane–air mixtures occurs in both thermal and catalytic reverse-flow reactors. The modeling and design of such reactor requires a reliable and relatively simple kinetic model of the combustion. Although a number of detailed descriptions of the kinetics of homogeneous combustion are available in the literature (including those which take into account complex free-radical reactions), their practical usefulness is doubtful. In the present study a simple one- or two-stage model is proposed which directly describes global kinetics and neglects intermediates and radicals. Special attention is paid to the mechanism of the possible formation of carbon monoxide. The …

Structure Studies On Nanocrystalline Powder Of Mgo Xerogel Prepared By Sol-Gel Method, Grzegorz Dercz, Krystian Prusik, L. Pajak, Roman Pielaszek, Janusz J. Malinowski, Wojciech Pudło

Janusz J. Malinowski

Nanocrystalline Mgo Powder Materials Prepared By Sol-Gel Studied By X-Ray Diffraction And Electron Microscopy, G. Dercz, L Pajak, K. Prusik, R Pielaszek, Janusz J. Malinowski

Janusz J. Malinowski

Persona Comme Outil De Design De Services Interactifs: Principes Et Exemple En E-Maintenance, Ahmed Seffah, Christophe Kolski, Djilali Idoughi

Professor Djilali IDOUGHI

Dans ce papier, nous discutons du rôle du persona comme outil de modélisation et d’analyse de l’expérience utilisateur. Ce concept est issu des travaux de recherche de marketing sur le comportement du consommateur. Sa finalité est une meilleure compréhension et une prise en compte de l’expérience de l’utilisateur final. L’Expérience Utilisateur ou client (UX) est un terme générique désignant une collection d’information couvrant le comportement de l’utilisateur, incluant les connaissances, l’expertise, et les attributs décrivant la personnalité de l’usager. Un cas d’exemple en logiciel comme service pour la e-maintenance illustre l’approche persona. Le Software as a Service (SaaS, logiciel comme …

The Development Of Humans – A Study Including Languages, Cultures, Religions And Genetics, Dr. Erik Dahlquist, Dr. Allan Dahlquist

Dr. Erik Dahlquist

The book covers the development of culture, religion, language and genetics of the human population since prehistory. Four main cultures have spread around the globe: 1) Monosyllabic language people with ancestor cult 2) Austroasiatic people with sun worshipping and megalit graves. Counting with 20 as the base 3) Uralic speaking people with kings from the sky, and strong city states. Moon and mother godess. Don´t differentiate between male and female, he and she. 4) Inflectual language speaking people with sky gods and cattles. Indoeuropeans. Often endings differentiating he and she. Shows how original cultures are refelected in todays society.

Effects Of Ultrasound In Coating Nano‐Precipitated Caco3 With Stearic Acid, Abdul Aziz Abdul Raman

Abdul Aziz Abdul Raman

Nano-Precipitated CaCO3 (NPCC) are coated with stearic acid to improve its dispersion in polymer as well as to reduce agglomeration. In this work, coating was done by wet method using ethanol. Ultrasonication was applied to NPCC to de-agglomerate micron size NPCC into smaller size. Effects of amplitude, temperature and energy input of ultrasonication was investigated. The amplitude was varied from 60% to 100% whereas temperature was varied from 5 ◦C to 45◦C. The energy input was stressed up from 3.6 kJ to 180 kJ. Mean diameter of NPCC were observed by using Particle Size Analyzer and Transmission Electron Microscopy (TEM). …

Development Of A Model Predictive Controller For Tankless Water Heaters, Gregor P. Henze, David P. Yuill, Andrew H. Coward

David Yuill

This paper describes the development of a novel approach to temperature control of tankless water heaters (TWHs). Conventional methods of controlling TWHs typically allow a high degree of error in the outlet water temperature when subjected to disturbances in flow rate or inlet water temperature. Poor control affects comfort, safety, and energy consumption associ- ated with TWHs. The novel control approach presented here uses model predictive control (MPC) to minimize the outlet temperature error. A dynamic heat transfer model of an electric TWH is developed and validated and used within a MPC-based controller. The controller is interfaced to a physical …

Controlled Language - Does My Company Need It?, Uwe Muegge

Uwe Muegge

Throughput And Delay In Wireless Sensor Networks Using Directional Antennas, Hong-Ning Dai

Hong-Ning Dai

Most of studies only consider that wireless sensor networks are equipped with only omni-directional antennas, which can cause high collisions. It is shown that the per node throughput in such networks is decreased with the increased number of nodes. Thus, the transmission with multiple short-range hops is preferred to reduce the interference. However, other studies show that the transmission delay increases with the increased number of hops.

In this paper, we consider using directional antennas in wireless sensor networks. We have found that using directional antennas not only can increase the throughput capacity but also can decrease the delay by …

Cleaner Metallurgical Industry In Serbia: A Road To The Sustainable Development, Zeljko J. Kamberovic

Zeljko J Kamberovic

Since the sustainable development has been a global and fundamental objecttive, a metallurgical industrial sector faces some of the most difficult sustainability challenges of any industrial sector. On the other hand, the metallurgical production in Serbia is a very important part of the economy. Due to present facilities and technologies, metallurgical companies face a great challenge to fulfill the requirements introduced by legislature referring to the cleaner production and sustainable development. The state of art in the production, facilities, pollution with some answers to imposed challenges is presented.

New Method Accurately Predicts Carbon Dioxide Equilibrium Adsorption Isotherms, Ali Ali

ali ali

No abstract provided.

Making The Case For Community-Based Laboratories, Earthea Nance

Earthea Nance, PhD (Stanford University, 2004)

No abstract provided.

Synthesis, Characterization And Application Of Al,Fe-Pillared Clays, Zeljko D. Cupic

Zeljko D Cupic

No abstract provided.

Constraint Handling Using Tournament Selection: Abductive Inference In Partly Deterministic Bayesian Network, Severino F. Galan, Ole J. Mengshoel

Ole J Mengshoel

Constraints occur in many application areas of interest to evolutionary computation. The area considered here is Bayesian networks (BNs), which is a probability-based method for representing and reasoning with uncertain knowledge. This work deals with constraints in BNs and investigates how tournament selection can be adapted to better process such constraints in the context of abductive inference. Abductive inference in BNs consists of finding the most probable explanation given some evidence. Since exact abductive inference is NP-hard, several approximate approaches to this inference task have been developed. One of them applies evolutionary techniques in order to find optimal or close-to-optimal …

Methods For Probabilistic Fault Diagnosis: An Electrical Power System Case Study, Brian Ricks, Ole J. Mengshoel

Ole J Mengshoel

Health management systems that more accurately and quickly diagnose faults that may occur in different technical systems on-board a vehicle will play a key role in the success of future NASA missions. We discuss in this paper the diagnosis of abrupt continuous (or parametric) faults within the context of probabilistic graphical models, more specifically Bayesian networks that are compiled to arithmetic circuits. This paper extends our previous research, within the same probabilistic setting, on diagnosis of abrupt discrete faults. Our approach and diagnostic algorithm ProDiagnose are domain-independent; however we use an electrical power system testbed called ADAPT as a case …

"Jurisprudencia Del Tjce: Interpretación De Los Artículos 1.1, 1.2 Y 1.3 Del Reglamento N° 258/97 Sobre Nuevos Alimentos", Luis González Vaqué

Luis González Vaqué

Importation of a food product into San Marino before the entry into force of Regulation (EC) No 258/97 of the European Parliament and of the Council of 27 January 1997 concerning novel foods and novel food ingredients is not a relevant factor for assessing whether that product meets the requirement relating to human consumption to a significant degree within the European Community within the meaning of Article 1(2) of that regulation.

The fact that all the individual ingredients of a food product meet the requirement laid down in Article 1(2) of Regulation No 258/97, or have a safe history, cannot …

Numerical Analysis, Chuen-Tat Kang

Kang Chuen Tat (江俊达)

The document is about the model problem and solution for unpublished engineering mathematics using numerical analysis. The original work has not been available elsewhere.

Analyzing The Impact Of A Virtual Machine On A Host Machine, Greg Dorn, Chris Marberry, Scott Conrad, Philip Craiger

J. Philip Craiger, Ph.D.