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Articles 20701 - 20730 of 27460

Full-Text Articles in Engineering

Engineering / Faculty / Sapp Nelson / Purdue University / 2015, Megan R. Sapp Nelson Apr 2015

Engineering / Faculty / Sapp Nelson / Purdue University / 2015, Megan R. Sapp Nelson

Data Information Literacy Case Study Directory

These materials were developed to assist a cohort of early career engineering education faculty to critically consider aspects of data management that they may implement in their developing research groups. These materials were used in the context of a two hour workshop and one hour brownbag. In the brownbag, the results of the Data Information Literacy research grant were discussed as they may be relevant to the early career faculty. The faculty then completed a self-assessment to identify their weak areas of data management and their personal priorities for data management. The two hour workshop was then conducted to assist …

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Engineering Students Place Second In Stryker Challenge: Andrews And Hope College Team Up For Mca Apr 2015

Engineering Students Place Second In Stryker Challenge: Andrews And Hope College Team Up For Mca

Andrews Agenda: Campus News

"Two Andrews University engineering students, Jonathan Penrod and Michael Hess II, were part of the Michigan Colleges Alliance team that placed second at the 2015 Stryker Engineering Challenge, held March 26–27, 2015, at Stryker Medical in Portage, Michigan... Teams of four students, preferably sophomores, competed for $1,000 scholarships and interviews for Stryker internships."

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Morris Leroy Spearman Apr 2015

Morris Leroy Spearman

Virginia Journal of Science

Obituary for Morris Leroy Spearman

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Man Made Organs: Technology Made It Possible But Can The Fda Keep Up?, Amanda Chatman Apr 2015

Man Made Organs: Technology Made It Possible But Can The Fda Keep Up?, Amanda Chatman

North Carolina Central University Science & Intellectual Property Law Review

No abstract provided.

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Phonon-Drag Contribution To Seebeck Coefficient Of Ge-On-Insulator Substrate Fabricated By Wafer Bonding Process, Veerappan Manimuthu, Shoma Yoshida, Yuhei Suzuki, Faiz Salleh, Mukannan Arivanandhan, Yoshinari Kamakura, Yasuhiro Hayakawa, Hiroya Ikeda Apr 2015

Phonon-Drag Contribution To Seebeck Coefficient Of Ge-On-Insulator Substrate Fabricated By Wafer Bonding Process, Veerappan Manimuthu, Shoma Yoshida, Yuhei Suzuki, Faiz Salleh, Mukannan Arivanandhan, Yoshinari Kamakura, Yasuhiro Hayakawa, Hiroya Ikeda

Makara Journal of Technology

In order to build high-sensitivity infrared photodetectors using SiGe nanowires, we investigate the thermoelectric characteristics of Ge-on-insulator (GOI) layers as a reference for SiGe. We fabricate p-type GOI substrates with an impurity concentration of 1016-1018cm-3 by a wafer-bonding process using Ge and oxidized Si wafers. Annealing treatment is performed in order to further increase the bonding strength of Ge/SiO2 interface. We measure the Seebeck coefficient in the temperature range of 290-350 K. The Seebeck coefficient of the GOI layers is very close to the theoretical value for Ge, calculated on the basis of carrier transport. Hence, there is a small …

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Group Decisions In Value Management, Christiono Utomo, Farida Murti, Arazi Idrus Apr 2015

Group Decisions In Value Management, Christiono Utomo, Farida Murti, Arazi Idrus

Makara Journal of Technology

This research deals with a technique to expedite group decision making during the selection of technical solutions for value management process. Selection of a solution from a set of alternatives is facilitated by evaluating using multicriteria decision making techniques. During the process, every possible solution is rated on criteria of function and cost. Function deals more with quality than with quantity, and cost can be calculated based on the theoretical time value of money. Decision-making techniques based on satisfying games are applied to determine the relative function and cost of solutions and hence their relative value. The functions were determined …

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Fiber Optic Ring Resonator Sensor Detection Technique Based On Spectral Intensity Integration, Purnomo Sidi Priambodo, Sasono Rahardjo, Gunawan Witjaksono, Djoko Hartanto Apr 2015

Fiber Optic Ring Resonator Sensor Detection Technique Based On Spectral Intensity Integration, Purnomo Sidi Priambodo, Sasono Rahardjo, Gunawan Witjaksono, Djoko Hartanto

Makara Journal of Technology

Resonant field phenomenon in optical ring resonator has been a major theme for various studies and can be used for various sensor applications. The spectral response shape changes are subjects to be discussed and analyzed for detection in optical sensor system. The spectral response changes are caused by various factors ranging from refractive index of the surrounding medium, medium loss due to absorption and scattering, and coupling variation between waveguides. These optical phenomena are mostly used for bio-sensor applications, since it is free from electromagnetic interference (EMI) and non-physically destructive. In this paper, we discuss our current research in developing …

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Seebeck Coefficient Of Soi Layer Induced By Phonon Transport, Faiz Salleh, Takuro Oda, Yuhei Suzuki, Yoshinari Kamakura, Hiroya Ikeda Apr 2015

Seebeck Coefficient Of Soi Layer Induced By Phonon Transport, Faiz Salleh, Takuro Oda, Yuhei Suzuki, Yoshinari Kamakura, Hiroya Ikeda

Makara Journal of Technology

The Seebeck coefficient of a patterned Si wire on P-doped SOI (Si-on-insulator) layer with a carrier concentration of 1018 cm-3 was measured near room temperature. The Seebeck coefficient is found to be smaller than that in the SOI layer and to be closer to the calculated Seebeck coefficient including the electronic contribution. The decrease in the Seebeck coefficient of Si wire is likely to occur due to the elimination of the contribution of phonon drag part. From the theoretical calculation of scattering rates by considering the scattering processes in phonon system, it is considered that an increase in phonon-boundary scattering …

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Hazard-Driven Drivers’ Behaviours Towards Vehicle-To-Median Safe Distances, Martha Leni Siregar Apr 2015

Hazard-Driven Drivers’ Behaviours Towards Vehicle-To-Median Safe Distances, Martha Leni Siregar

Makara Journal of Technology

A median is required for a two-way road to separate traffic from opposing lanes and to prevent head-on collisions. However, studies indicate that medians are also perceived as hazards which need to be avoided during driving. This hazard perception is manifested in drivers’ changing behavior towards various types of medians along the driving lanes inform of their tendency to allow various safe distances to the medians. The Indonesian Highway Capacity Manual (IHCM) does not differentiate between types of medians and the influence on the drivers’ choice of safe margin to the medians. Therefore, this study looks into how the existence …

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Construction Of A Novel Method Of Measuring Thermal Conductivity For Nanostructures, Hiroya Ikeda, Shoma Yoshida, Yuhei Suzuki, Veerappan Manimuthu, Faiz Salleh, Fujio Kuwahara, Masaru Shimomura, Kenji Murakami Apr 2015

Construction Of A Novel Method Of Measuring Thermal Conductivity For Nanostructures, Hiroya Ikeda, Shoma Yoshida, Yuhei Suzuki, Veerappan Manimuthu, Faiz Salleh, Fujio Kuwahara, Masaru Shimomura, Kenji Murakami

Makara Journal of Technology

With the aim of characterizing the thermal conduction in a nanometer-scaled materials, we have constructed a novel method on the basis of an ac calorimetric method. In this method, periodic sample heating is performed by light irradiation and the corresponding periodic temperature is detected by infrared irradiative thermometer. This makes us measure the thermal diffusivity out of contact with the objective sample. In the present study, we confirm to measure the thermal diffusivity of bulk Si and Cu by this non-contact method with halogen-lamp irradiation. In determining the thermal diffusivity from the relationship between distance deviation and delay time, the …

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The Effects Of The Types Of Milk (Cow, Goat, Soya) And Enzymes (Rennet, Papain, Bromelain) Toward Cheddar Cheese Production, Ariestya Arlene, Anastasia Prima Kristijarti, Ivana Ardelia Apr 2015

The Effects Of The Types Of Milk (Cow, Goat, Soya) And Enzymes (Rennet, Papain, Bromelain) Toward Cheddar Cheese Production, Ariestya Arlene, Anastasia Prima Kristijarti, Ivana Ardelia

Makara Journal of Technology

The objectives of this research are to study the effects of different types of milk and enzymes toward the yield and quality (moisture, ash, protein, fat content, and texture) of cheddar cheese and the interaction between those two variables during the process. The types of milk are cow, goat, and soya milk, while the types of enzymes are rennet, papain, and bromelain enzymes. Regarding the procedure, the milk is first pasteurized before CaCl2 and Lactobacillus lactis that acts as the acidifier starter as much as 0.2% (w/v) and 0.5% of the milk volume are added respectively. The amount of enzyme …

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Energy And Exergy Analysis Of Kalina Cycle For The Utilization Of Waste Heat In Brine Water For Indonesian Geothermal Field, Nasruddin Nasruddin, Agus Noor Sidiq, Abdulmajeed Mohamad, Rama Usvika Apr 2015

Energy And Exergy Analysis Of Kalina Cycle For The Utilization Of Waste Heat In Brine Water For Indonesian Geothermal Field, Nasruddin Nasruddin, Agus Noor Sidiq, Abdulmajeed Mohamad, Rama Usvika

Makara Journal of Technology

The utilization of waste heat in a power plant system—which would otherwise be released back to the environment—in order to produce additional power increases the efficiency of the system itself. The purpose of this study is to present an energy and exergy analysis of Kalina Cycle System (KCS) 11, which is proposed to be utilized to generate additional electric power from the waste heat contained in geothermal brine water available in the Lahendong Geothermal power plant site in North Sulawesi, Indonesia. A modeling application on energy and exergy system is used to study the design of thermal system which uses …

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Pertumbuhan, Hasil Dan Kualitas Tomat Cv. Marta-9 Pada Berbagai Sistem Budidaya Dalam Rumah Plastik Di Dataran Medium Jatinangor, Tino Mutiarawati Onggo, Sumadi, R. Fauziah Mar 2015

Pertumbuhan, Hasil Dan Kualitas Tomat Cv. Marta-9 Pada Berbagai Sistem Budidaya Dalam Rumah Plastik Di Dataran Medium Jatinangor, Tino Mutiarawati Onggo, Sumadi, R. Fauziah

Jurnal Kultivasi

Penanaman tomat dalam rumah plastik dengan sistem budidaya hidroponik, meng-0hasilkan buah dengan kuantitas dan kualitas baik serta dapat dilakukan secara kontinu, namun kekurangan sistem tersebut adalah bahan kimia yang digunakan untuk hara tanaman mahal, sehingga perlu dicarikan sistem budidaya alter-natif yang dapat mengimbangi hasil dan kualitas hasil sistem hidroponik. Tujuan dilaku-kannya penelitian ini adalah untuk mempelajari berbagai sistem budidaya tanaman tomat dalam rumah plastik yang dapat diaplikasikan di dataran medium dengan biaya yang lebih murah serta menguji jumlah batang produksi yang dapat menghasilkan pertumbuhan dan hasil tanaman serta kualitas tomat yang baik. Penelitian dilakukan dari bulan Juni sampai dengan Oktober …

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Comparison Of Aircraft Tire Wear With Initial Wheel Rotational Speed, Abdurrhman A. Alroqi, Weiji Wang Mar 2015

Comparison Of Aircraft Tire Wear With Initial Wheel Rotational Speed, Abdurrhman A. Alroqi, Weiji Wang

International Journal of Aviation, Aeronautics, and Aerospace

The impact an aircraft has on its tires when it lands has been problematic practically since the invention of the airplane. Upon touchdown, the tires frequently smoke as rubber burns off and tire material is worn away while the tires slip up to a steady rolling speed. To minimise tire slip, torque or spin mechanisms could be added to each tire assembly to accelerate the tire to match the landing speed. Patents have been registered since the 1940s to improve tire safety and performance, decrease the substantial wear that results from every landing, and save airline companies the cost of …

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Balancing Domestic Nuclear Industry Viability With International Security: Imminent Changes To Nuclear Export Control Regulations, H. Brendan Burke Mar 2015

Balancing Domestic Nuclear Industry Viability With International Security: Imminent Changes To Nuclear Export Control Regulations, H. Brendan Burke

Brigham Young University International Law & Management Review

No abstract provided.

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Knowledge Management At Eni: A Case Study Of Managing Knowledge In An International Oil And Gas Company, Lauren Elizabeth Vecchietti, Kevin Delaney, Gianna Giudicati, Filippo Capriotti Mar 2015

Knowledge Management At Eni: A Case Study Of Managing Knowledge In An International Oil And Gas Company, Lauren Elizabeth Vecchietti, Kevin Delaney, Gianna Giudicati, Filippo Capriotti

Level 3

International oil and gas companies operate in a competitive environment where superior performance demands that opportunities be identified, evaluated and exploited to minimise time to market and create value for the stakeholders. To do so such companies rely on their human resources, state of the art technology, advanced management systems, innovation and knowledge to maintain competitive advantage. Oil and gas companies have long recognised the importance of knowledge management in achieving this goal. To the forefront of these oil and gas companies is Eni, which is one of the largest oil companies in the world. This paper represents an opportunity …

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Efficient General Computational Method For Estimation Of Standard Atmosphere Parameters, Nihad E. Daidzic Ph.D., Sc.D. Mar 2015

Efficient General Computational Method For Estimation Of Standard Atmosphere Parameters, Nihad E. Daidzic Ph.D., Sc.D.

International Journal of Aviation, Aeronautics, and Aerospace

Knowledge of standard air temperature, pressure, density, speed of sound, and viscosity as a function of altitude is essential information in aircraft design, performance testing, pressure altimeter calibration, and several other aeronautical engineering and aviation science applications. A new efficient computational method for rapid calculations of standard atmospheric parameters up to 86 orthometric km is presented. Additionally, mass and weight of each standard atmospheric layer were calculated using a numerical integration method. The sum of all fractional masses and weights represents the total mass and weight of Earth’s atmosphere. The results obtained here agree well with measurements and models of …

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Building And Growing With Mobile Technology, Chris Lierheimer Mar 2015

Building And Growing With Mobile Technology, Chris Lierheimer

The Professional Constructor

Today’s construction managers have an arsenal of mobile technologies at their disposal, all of which make managing projects vastly more organized and efficient than ever before. In this paper, I will explore in detail three different mobile technologies that the modern contractor has at his or her disposal, their benefits, potential pitfalls that they may present, and my thoughts on the future of these tools. I will share personal experience with, and research based on topics ranging from building information modeling, to RFID chip tracking of resources, to cloud based programs that streamline information flow.

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Using Mobile Technology For Managing Construction Projects, Paul Shaw Mar 2015

Using Mobile Technology For Managing Construction Projects, Paul Shaw

The Professional Constructor

This essay examines the use and application of emerging mobile technologies in the construction industry. Mobile phones and tablets are discussed in-depth, and can be used to replace office tools, to collaborate, and to bring building information modeling (BIM) technology out into the field. Next, wearable computing technology is discussed, including Google Glass and smart hard hats. This technology provides another avenue for construction information access in the field. Finally, unmanned aerial vehicles are discussed, along with their challenges and potential benefits. Increased technology use will absolutely improve efficiency and profitability in the construction industry.

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Solar Orientation For Low-Energy Residential Building In Pagosa Springs, Colorado, Torry D. Hessman, Caroline M. Clevenger, Maryellen C. Nobe, Katharin Leigh Mar 2015

Solar Orientation For Low-Energy Residential Building In Pagosa Springs, Colorado, Torry D. Hessman, Caroline M. Clevenger, Maryellen C. Nobe, Katharin Leigh

The Professional Constructor

This research compares the energy performance of 43 homes. Seven homes, constructed by a single builder using passive design principles, are the focus of the study. The remaining 36 homes, more conventionally built, establish a baseline for local residential energy performance. All of the homes are located within a six square-mile geographical region in Pagosa Springs, Colorado. Researchers collected utility data over a two year period, from September 2009 to August 2011. While other factors impact performance, for this study the dependent variable was energy consumption in British Thermal Units (BTUs) per square foot per season. The independent variable was …

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Adoption Of Green Building Guidelines In Usa, India, And China, Matt Syal, Yunhui Yang, Gayatri Kumar, Jawanda Jackson Mar 2015

Adoption Of Green Building Guidelines In Usa, India, And China, Matt Syal, Yunhui Yang, Gayatri Kumar, Jawanda Jackson

The Professional Constructor

Green Building Guidelines (GBGs) have played a major role in the global efforts to develop environmentally responsible buildings and infrastructure. These guidelines serve as ratings tools to evaluate sustainable practices used in buildings’ design, construction, and operations. Although, the acceptance of these guidelines has begun to increase globally, only a few countries have seen their widespread adoption. The acceptance of GBGs is dependent upon various factors specific to the country and society in which they exist. USA, India, and China were selected to be the focus of this study since each of these countries present a unique set of societal …

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Characterizing Equipment Cost, Fuel Use, And Emissions For Earthwork Activities, Phil Lewis, Yongwei Shan, Apif Hajji, Elizabeth Hazzard Mar 2015

Characterizing Equipment Cost, Fuel Use, And Emissions For Earthwork Activities, Phil Lewis, Yongwei Shan, Apif Hajji, Elizabeth Hazzard

The Professional Constructor

The objective of this paper is to examine the relationships between construction equipment costs, fuel use, and air pollutant emissions to make more informed decisions in construction planning and achieve more sustainable construction activity. This paper presents an estimating approach that combines both construction and environmental data to assess the relationships between equipment costs, fuel use, and emissions. To characterize these relationships, a case study is presented for a dozer performing a bulk excavation activity. Sensitivity analyses based on soil type, dozing distance, and engine horsepower rating are presented. Results indicate that there is little difference in the equipment total …

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General Interest Articles, American Institute Of Constructors Mar 2015

General Interest Articles, American Institute Of Constructors

The Professional Constructor

No abstract provided.

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Assessing The Economic, Energy, And Environmental Impacts Of A Bridge Replacement Project, Elizabeth Hazzard, Phil Lewis Mar 2015

Assessing The Economic, Energy, And Environmental Impacts Of A Bridge Replacement Project, Elizabeth Hazzard, Phil Lewis

The Professional Constructor

As the nation moves toward more sustainable energy and environmental standards, it is important to examine all sources of fuel consumption and pollution, including heavy-duty diesel (HDD) construction equipment. In order to quantify these sources at the project level, they must be identified with their respective activities. A case study was performed on an Oklahoma Department of Transportation (ODOT) bridge replacement project in order to establish a baseline estimate of real-world equipment activity, fuel use, and emissions data. These data were collected on a daily basis via jobsite visits and included specific information such as the equipment’s model year, engine …

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In Memory Of Fran Dugan, American Institute Of Constructors Mar 2015

In Memory Of Fran Dugan, American Institute Of Constructors

The Professional Constructor

No abstract provided.

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Analysis Of Green Building Initiatives On U.S. University Campuse, Dennis C. Bausman, Ben Mueller Mar 2015

Analysis Of Green Building Initiatives On U.S. University Campuse, Dennis C. Bausman, Ben Mueller

The Professional Constructor

As population expands and resource consumption grows, interest in sustainable practices continues to intensify. Universities and colleges in the U.S. have been leading the trend toward building certification and green initiatives to reduce energy consumption, lower water consumption, and recycle solid waste. This study investigates the extent to which green practices are implemented on new construction and the renovation of existing building stock on university campuses across the United States. The study also examines the financial analysis techniques institutions use to assess and prioritize green initiatives on new and existing facilities. The population selected for this study was two hundred …

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Full Issue, Volume 39, Number 1 Mar 2015

Full Issue, Volume 39, Number 1

The Professional Constructor

No abstract provided.

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Bs News March/April Mar 2015

Bs News March/April

Building Services Engineering

No abstract provided.

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Cybersecurity In The Information Age Mar 2015

Cybersecurity In The Information Age

DePaul Magazine

According to the Identify Theft Resource Center, more than 750 breaches occurred in 2014, exposing more than 83 million records. Breaches occur because people have discovered that there’s money to be made from stealing corporate and customer information. Faced with this reality, consumers and companies may wonder if it’s possible to protect their personal and financial data. DePaul's College of Computing and Digital Media is training the next generation of cybersecurity experts to thwart cybersecurity attacks. In addition, DePaul faculty and alumni in data security offer advice to consumers on securing their financial and personal information.

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Electrochemical Monitoring Of Cell Wall-Regulated Transient Extracellular Oxidative Burst From Single Plant Cells, Jun-Tao Liu, Yan-Ling Liu, Zhi Cheng, Shi-Jing Chen, Wei-Hua Huang Feb 2015

Electrochemical Monitoring Of Cell Wall-Regulated Transient Extracellular Oxidative Burst From Single Plant Cells, Jun-Tao Liu, Yan-Ling Liu, Zhi Cheng, Shi-Jing Chen, Wei-Hua Huang

Journal of Electrochemistry

Oxidative burst by rapid, transient generation of reactive oxygen species (ROS) is a fundamental process for plant disease defense and signal transduction. ROS can be protective or toxic depending on their concentrations, and critical balance between ROS production and scavenging is regulated by complex and perfect mechanisms in plant cells. However, the process of rapid and transient ROS burst from plant cells and their regulatory mechanisms are far from being completely understood, owing to the methodological obstacles in real-time monitoring such a fast process. In this work, we showed the application of microelectrode electrochemistry with high spatiotemporal resolution to monitor …

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