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mechanical engineering curricula: A baseline study for the future effects of ABET EC2000

International Journal of mechanical engineering Education 2002年第4期31卷 327-338页

作者： Whiteman, Colonel Wayne E. Mechanical Engineering Program Dirctr. Department of Civil and Mechanical Engineering United States Military Academy West PointNY10996 United States Woodruff School of Mechanical Engineering Georgia Institute of Technology 801 Ferst Drive NW AtlantaGA30332-0405 United States

The Accreditation Board for engineering and technology (ABET) is recognized by the US Department of Education as the sole agency responsible for accreditation of educational programs leading to degrees in engineering, engineering technology, and related engineering areas. Starting in 2001, engineering programs are being accredited under the new engineering Criteria 2000 (EC2000). The philosophy of engineering Criteria 2000 is to allow institutions and programs to define their mission and objectives to meet the needs of their constituents and enable program differentiation. Emphasis is placed on continuous improvement of programs based on the input of constituents and a process that links outcomes and assessment to program objectives. This paper is a preliminary study of selected mechanical engineering programs to discern the impact of EC2000 on curriculum development. Data on the layout and composition of mechanical engineering curricula for nine schools in the United States with PhD programs and nine schools without PhD programs are presented. This research establishes a baseline for these mechanical engineering programs at the beginning of EC2000 implementation. A follow-on study in two to three years in envisioned. This follow-on study will compare results and identify any significant changes in curricula as the EC2000 assessment process matures. © 2003 SAGE Publications.

关键词： Accreditation

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Critical success factors of external sustainability: Multiple-case studies

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AIP Conference Proceedings 2025年第1期3120卷

作者： Nur Puji Lestari Stefania Boscari Dawi Karomati Baroroh Program of Industrial Technology Institute of Technology and Science Nahdlatul Ulama Pekalongan Pekalongan 51173 Indonesia Faculty of Economic and Business University of Groningen Groningen 9172 Netherlands Department of Mechanical and Industrial Engineering Universitas Gadjah Mada Yogyakarta 55281 Indonesia

Sustainable supply chain management (SSCM) is crucial, yet it is still difficult to implement in companies. This happens because there are various factors known as critical success factors (CSFs) that have a role in the implementation of plans and operational performance in sustainability. The study used multiple-case studies and analyzed four different types of companies that have implemented external sustainability. Based on the within-case analysis, a list of CSFs for external sustainability implementation that differs between organizations is generated for each case. Furthermore, the effects of contingencies toward CSFs implementation are established.

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Droplet breakup morphologies and the resultant size distribution in an opposed-flow airstream at different Weber numbers

arXiv

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arXiv 2025年

作者： Chakraborty, Shubham Ade, Someshwar Sanjay Chandrala, Lakshmana Dora Sahu, Kirti Chandra Center for Interdisciplinary Program Indian Institute of Technology Hyderabad Kandi Telangana Sangareddy502 284 India Department of Mechanical and Aerospace Engineering Indian Institute of Technology Hyderabad Kandi Telangana Sangareddy502 284 India Department of Chemical Engineering Indian Institute of Technology Hyderabad Kandi Sangareddy Telangana 502 284 India

The present study investigates the morphology and breakup dynamics of a freely falling drop in a vertical airstream using shadowgraphy and in-line holography. The in-line holography provides the temporal evolution of the volumetric size distribution of child droplets formed during various fragmentation processes at different Weber numbers (We). The droplet undergoes different fragmentation processes at significantly lower Weber numbers in opposed-flow configurations compared to cross-flow configurations. Our findings reveal distinct fragmentation modes, namely bag, bag-stamen, and dual-bag breakup, observed at We = 9.38, 16.9, and 18.9, respectively. At We = 9.38, the combined effects of bag rupture, rim breakup, and node fragmentation generate child droplets of varying sizes, driven by the interplay of the Rayleigh-Plateau and Rayleigh-Taylor instabilities. At We = 16.9, the interaction of aerodynamic and shear forces leads to bag-stamen fragmentation, characterized by forming a stamen-like structure along with the bag. Both bag and bag-stamen breakups result in tri-modal size distributions. However, at We = 16.9, fewer tiny droplets are produced compared to the bag breakup observed at lower Weber numbers. In contrast, at We = 18.9, a dual-bag breakup occurs, where both bags inflate and burst simultaneously. This process generates tiny child droplets in the early stages, while larger child droplets form later due to the fragmentation of the rim and nodes, resulting in a bi-modal size distribution. We have performed a theoretical analysis using a two-parameter gamma distribution, which satisfactorily predicts the size distributions observed experimentally at different Weber numbers. © 2025, CC BY.

关键词： Size distribution

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It takes two to teach capstone design

It takes two to teach capstone design

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2008 ASEE Annual Conference and Exposition

作者： Dekker, Don Sundarrao, Stephen Dubey, Rajiv University of South Florida Department of Mechanical Engineering University of South Florida Rehabilitation Engineering and Technology Program USF Mechanical Engineering Department College of Engineering USF

No abstract available

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Nanostructured Multicomponent Bioinks with Nanodiamond and Magnesium-Doped Nanohydroxyapatite for Enhanced Bone Tissue engineering

SSRN

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SSRN 2025年

作者： Nicolae, Carmen-Valentina Jahani Kadousaraei, Masoumeh Yamada, Shuntaro Aydin, Mehmet Serhat Al-Sharabi, Niyaz Campodoni, Elisabetta Sandri, Monica Steinmüller-Nethl, Doris Syverud, Kristin Rashad, Ahmad Stancu, Izabela Cristina Mustafa, Kamal Advanced Polymer Materials Group University Politehnica of Bucharest 1-7 Gh. Polizu Street Bucharest011061 Romania Center of Translational Oral Research Department of Clinical Dentistry Faculty of Medicine University of Bergen Bergen Norway CNR-ISTEC Institute of Science and Technology for Ceramics National Research Council of Italy Faenza Italy DiaCoating GmbH Wattens Austria RISE PFI AS Trondheim Norway Bioengineering Graduate Program Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN46556 United States

The development of bioinks for bone tissue engineering (BTE) requires a precise balance of printability, stability and bioactivity to ensure cell viability while supporting cell attachment, proliferation and osteogenic differentiation. Although numerous bioink formulations for BTE demonstrate good printability and bioactivity, they often lack the stability or osteogenic potential required to support long-term bone regeneration. To address these limitations, we developed multicomponent formulations for extrusion-based bioprinting by combining TEMPO-oxidized cellulose nanofibrils (TO-CNFs) with gelatin methacryloyl (GelMA) and sodium alginate (SA). The formulation was further loaded with nanodiamond particles (NDs), magnesium-doped nanohydroxyapatite (MgHA) or a combination of both to impart synergistic effects. This study investigates the individual and combined effects of NDs and MgHA on the printability, structural integrity, biocompatibility, and osteogenic performance of the bioink, hypothesizing that a dual nanoparticle system could provide superior multifunctionality. Rheological and printability tests confirmed that the incorporation of NDs improved the structural integrity and printing fidelity of the printed structures, with all formulations showing comparable mechanical properties. Seeded human gingival fibroblasts showed enhanced viability and spreading, and favorable metabolic activity and proliferation on ND-containing hydrogels. While the viability and elongation of bioprinted osteoblast-like cells in all four bioinks were comparable, MgHA-containing bioinks promoted osteogenic differentiation of osteoblasts, shown by increased Runx2 expression, ALP activity, and biomineralization. These findings suggest that the combined incorporation of NDs and MgHA within the TO-CNFs-GelMA-SA matrix provides a promising platform with robust printability and enhanced bioactivity, addressing the current trade-offs in the design of bioinks for comprehensive BTE. © 2025,

关键词： Bone

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Controlling the selection stringency of phage display using a microfluidic device (vol 9, pg 1033, 2009)

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LAB ON A CHIP 2009年第24期9卷 3604-3604页

作者： Liu, Yanli Adams, Jonathan D. Turner, Kelisha Cochran, Frank V. Gambhir, Sanjiv Sam Soh, H. Tom Neuroscience Research Institute Department of Materials Department of Physics School of Science and Technology Molecular Imaging Program at Stanford Department of Mechanical Engineering

We report the utilization of microfluidic technology to phage selection and demonstrate that accurate control of washing stringency in our microfluidic magnetic separator (MMS) directly impacts the diversity of isolated peptide sequences. Reproducible generation of magnetic and fluidic forces allows controlled washing conditions that enable rapid convergence of selected peptide sequences. These findings may provide a foundation for the development of automated microsystems for rapid in vitrodirected evolution of affinity reagents. [ABSTRACT FROM AUTHOR]

关键词： Magnetic separators accuracy control Affinity Reagent Phage display Peptides directed evolution Magnetic force Microfluidics Microfluidic Devices Washing

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Studying the current properties of buffer solution through micro-fluidic channels driven with the pulse bias

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Science China(Technological Sciences) 2014年第2期57卷 249-253页

作者： GAO ZeYang WANG KaiGe ZHANG Chen MA HongWei WANG GuiRen BAI JinTao Institute of Photonics & Photo-Technology International Scientific and Technological Cooperation Base of Photoelectric Technology & Functional Materials and Application Northwest University Mechanical Engineering Department & Biomedical Engineering Program University of South CarolinaColumbia 29208 USA

In the research of bio-molecular chips and sensors, extra electric biases are most often employed to control and manipulate the DNA and protein molecules moving through micro/nano-fluidic channels. In order to accurately and flexibly control the bio-molecules as they move within the channels, a clear understanding of how the current changes within the buffer solution caused by an applied bias is fundamental. In this report, the current changed value of different buffer solutions, e.g., KC1, TE, and TBE was systematically studied with real-time monitoring and quantitative analysis in the situation of the buffers moving through a fluidic channel with a 5 μm inner diameter, driven by biases of 50 or 100 mV. The results revealed that the relation- ship between the current changed value and the pause interval of the applied electric field is highly consistent with the Hill Equation, which is helpful for accurately detecting and manipulating single biomolecules in microfluidic sensors and biochips.

关键词： micro-fluidic channel transporting mechanics current changed value interval time

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Environmental and economic impacts of nitrogen trifluoride at an idaho semiconductor facility

Environmental and economic impacts of nitrogen trifluoride a...

引用

ASME 2020 International Design engineering Technical Conferences and Computers and Information in engineering Conference, IDETC-CIE 2020

作者： Thompson, Matthew A. Mohajeri, Amir Mirkouei, Amin Technology Management Program Department of Mechanical Engineering University of Idaho ID United States

ISBN: (纸本)9780791883952

Nitrogen Trifluoride (NF3) is an inorganic compound widely used in the electronics industry for manufacturing various products, such as semiconductors, solar panels, and touch screens. However, NF3 emissions that accumulate in the atmosphere have 17,200 times the global warming potentials of CO2 over a 100-year time horizon. The abatement efficiency for NF3 is high, although some amount of NOx is generated. This study aims to provide economic and environmental impact assessments on the use of NF3. Life cycle assessment method is applied for evaluating environmental aspects. Additionally, a real case study for the Idaho semiconductor facility is used to assess the method and demonstrate the application of this study. The results show that slight reductions in abatement efficiency have dramatic impacts on mitigating greenhouse gas (GHG) emissions. Even small unplanned releases of NF3, either through mechanical failure or human error, have significant environmental impacts, and every reasonable effort should be taken to avoid such incidents. The results also indicate that the cost of abatement is the primary driver of economic impact. It is found that the considerable distance from the chemical plant in Arizona to the point of use in Idaho contributed a minor portion of GHGs associated with the use of NF3. It is also found that contaminants (e.g., SF6 and CF4) within the cylinder potentially have more substantial GHG impacts than the actual NF3, owing in part to the relative ease with which NF3 is destroyed through abatement. © 2020 American Society of mechanical Engineers (ASME). All rights reserved.

关键词： Sustainable development

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Injection molding of SiC-reinforced PM aluminum matrix composites

Injection molding of SiC-reinforced PM aluminum matrix compo...

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作者： Ahmad, Faiz Mechanical Engineering Program Materials Group University of Technology Tronoh 31750 Perak Malaysia

The use of powder metallurgy (PM) techniques and injection molding to produce short fiber-reinforced aluminum matrix composites (AMCs),is discussed. Aluminum matrix composites (AMCs) reinforced with SiC fibers are used in the automotive and aerospace industries by virtue of their high-strength-to-weight ratio, and low thermal expansion coefficient. Powder injection molding (PIM) is utilized in the fabrication of short fiber-reinforced intermetallic composites and ceramic composites without controlling the orientation of the fibers. The fiber degradation analysis at each stage of the process showed an increase in fiber fracture with increased fiber volume fraction.

关键词： Metallic matrix composites

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Numerical Results of an Integral Formulation of Transient Radiative Transfer

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ASME 1999 International mechanical engineering Congress and Exposition, IMECE 1999

作者： Tan, Z.-M. Hsu, P.-F. Mechanical Engineering Program Florida Institute of Technology MelbourneFL32901 United States

ISBN: (纸本)9780791816431

Numerical computations are performed for the transient radiative transfer equation within the one-dimensional parallel plate geometry using an integral formulation obtained in a prior work. The medium under consideration is absorbing and isotropically scattering. One boundary is a black emitting surface or a transparent surface subjected to the collimated incident radiation. The incident intensity is applied at the start of the transient. The other boundary is a cold and black or specularly reflecting surface. The spatial and temporal incident radiation and radiative flux distributions are presented for different boundary conditions and for uniform and nonuniform property distribution. The transient results at large time step are compared with steady-state solutions by the finite volume and quadrature methods and show excellent agreement. The solutions of reflecting boundary condition exhibit distinctive behavior from that of the non-reflecting boundary. The integral formulation is extended to handle the transient transfer within the nonhomogeneous participating media. The integral formulation has several advantages over the differential treatment of the hyperbolic wave of the radiative transport;among others: (1) The avoidance of using a high order upwind difference scheme in resolving the wave front;(2) Providing a sound basis for physical interpretation as the radiative transfer is a volumetric process;and (3) Many integral equation numerical methods that have previously been developed for the steady state integral formulation can be re-applied to treat the transient problem. Copyright © 1999 by ASME.

关键词： Radiative transfer

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