This study explores the feasibility of using large language models (LLMs), specifically GPT-4o (ChatGPT), for automated grading of conceptual questions in an undergraduate mechanicalengineering course. We compared th...
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A thruster is a device used for station keeping, attitude control, in the reaction control system, or long-duration, low-thrust acceleration. Thruster is one of the main components in autonomous surface vehicle. In th...
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Andy Packard, an expert from University of California at Berkeley (UCB) mechanicalengineering Department shares views on the use of sum-of-squares (SOS) methods to determine the region of attraction (ROA). SOS applie...
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Andy Packard, an expert from University of California at Berkeley (UCB) mechanicalengineering Department shares views on the use of sum-of-squares (SOS) methods to determine the region of attraction (ROA). SOS applies to polynomials in several real variables and a polynomial is a finite linear combination of monomials. The ROA can be visualized by simulating the system from many initial conditions and plotting the trajectories in a phase plane plot for systems with two or three states. SOS techniques can be used to perform nonlinear analyses, including computation of input/output gains, estimation of reachable sets, and computation of robustness margins. The approaches that apply to SOS methods includes the computational requirements that grow rapidly in the number of variables and polynomial degree, which roughly limits SOS-based analysis to systems with at most eight to ten states, one to two inputs, and polynomial vector fields of degree 3.
The Partnership, Pathway, and Pipeline for engineering Education (P 3E2) Project is an exploratory collaboration between ASU engineering faculty and Santan Junior High School teachers from a broad range of subjects an...
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The Partnership, Pathway, and Pipeline for engineering Education (P 3E2) Project is an exploratory collaboration between ASU engineering faculty and Santan Junior High School teachers from a broad range of subjects and local community members aimed at engaging middle school students in real world and grade-relevant engineering activities as a way of enriching the value of their STEM education as it relates to STEM careers and their broad societal relevance. Central to the P3E2 project is the introduction of engineering design across the curricula via the implementation of the engineering design process through engineering service-learning projects that are intended to facilitate integrated learning of science, math, social studies and language arts. Such STEM-based integrated activities have been co-developed in partnership with middle school teachers and are designed to engage students and captivate their interest while promoting problem-solving and entrepreneurial skills by addressing real world needs in their local communities. This one-year pilot project consisted of four key phases that were implemented in nearly equal quarters, i.e., (a) the creation of a vibrant partnership to assess, motivate and inform teachers and counselors about engineering and its societal connections, workforce barriers, and curricular relevance, (b) the development of a viable education pathway to successfully engage 8th grade students in the full spectra of STEM-based learning that captivate their interest through integrated activities that span across science, mathematics, language arts and social studies, (c) the implementation of semester-long science and engineering fair projects chosen by students who were mentored by ASU engineering undergraduate and graduate students and (d) the evaluation of the P3E2 program effectiveness using designated assessment tools that were developed and administered to the teachers and students at the middle school. The major findings and the lessons
A new scheme for designing a spatial light source for depth direction coherence control is proposed. This method is based on a combination of spatial coherence phenomena and the superposition principle. A computer-gen...
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A new scheme for designing a spatial light source for depth direction coherence control is proposed. This method is based on a combination of spatial coherence phenomena and the superposition principle. A computer-generated light source is projected onto a moving diffuser in order to realize multiple coherence peaks in the depth direction by synthesizing the longitudinal coherence function. Using this light source, we can shape a coherence function with multiple peaks, which are equidistant and have different strengths for distinguishability. This method may provide a new way of performing long-range depth direction measurements.
In this paper, A numerical model based on the shallow water equations is derived to study the combined effects of wind and progressive gravity waves on surf-zone currents. The wind has temporal and spatial variations....
In this paper, A numerical model based on the shallow water equations is derived to study the combined effects of wind and progressive gravity waves on surf-zone currents. The wind has temporal and spatial variations. The combined effects of spatially and temporal varying wind and waves on the surf-zone currents are investigated by considering different wave incident angles and wind stresses. Numerical results of the current distribution demonstrate the role of the basin topography, coastal configuration and the combined effect of wave radiation and wind stresses on the surf-zone currents distribution. Also, the water surface elevation emphasizes the role of the pressure gradient force due to the non-penetration condition at the coastal boundary.
This work examines the processing and mechanical properties of graphite compacts electroplated by a copper layer. Natural graphite (NG) flakes have been compressed to make graphite compacts. A copper electrodeposit ha...
This work examines the processing and mechanical properties of graphite compacts electroplated by a copper layer. Natural graphite (NG) flakes have been compressed to make graphite compacts. A copper electrodeposit has been applied to the surface of the graphite compact in order to reinforce the mechanical properties and prevent the graphite particles from peeling off. The natural graphite flakes were stacked layer by layer in order within the graphite compact. The effects of different electroplating conditions on the mechanical properties of the graphite compacts were studied. The density of the compact reaches to a limit value when the pressure was above 100 MPa. The tests indicated that the compressive, flexural and shear strengths increase at least 150% with the copper layer. The damage mechanisms in the compacts were investigated by using a scanning electron microscopy.
The mechanical properties of cells change with their differentiation,chronological age,and malignant ***,these properties may be useful label-free biomarkers of various functional or clinically relevant cell ***,we de...
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The mechanical properties of cells change with their differentiation,chronological age,and malignant ***,these properties may be useful label-free biomarkers of various functional or clinically relevant cell ***,we demonstrate mechano-node-pore sensing(mechano-NPS),a multi-parametric single-cell-analysis method that utilizes a four-terminal measurement of the current across a microfluidic channel to quantify simultaneously cell diameter,resistance to compressive deformation,transverse deformation under constant strain,and recovery time after *** define a new parameter,the whole-cell deformability index(wCDI),which provides a quantitative mechanical metric of the resistance to compressive deformation that can be used to discriminate among different cell *** wCDI and the transverse deformation under constant strain show malignant MCF-7 and A549 cell lines are mechanically distinct from non-malignant,MCF-10A and BEAS-2B cell lines,and distinguishes between cells treated or untreated with cytoskeleton-perturbing small *** categorize cell recovery time,ΔT_(r),as instantaneous(ΔTr~0 ms),transient(ΔT_(r)≤40 ms),or prolonged(ΔT_(r)>40 ms),and show that the composition of recovery types,which is a consequence of changes in cytoskeletal organization,correlates with cellular *** the wCDI and cell-recovery time,mechano-NPS discriminates between sub-lineages of normal primary human mammary epithelial cells with accuracy comparable to flow cytometry,but without antibody ***-NPS identifies mechanical phenotypes that distinguishes lineage,chronological age,and stage of malignant progression in human epithelial cells.
The energy situation in remote islands is becoming critical with high fuel import costs preventing the islands from developing at a faster pace. São Miguel is an island located in the middle of the Atlantic with ...
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The research fields of microfluidics and soft robotics both involve complex small-scale internal channel networks, embedded within a solid structure. This work examines leveraging viscous peeling as a mechanism to cre...
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