582 research outputs found
sj-docx-1-trr-10.1177_03611981221134628 – Supplemental material for Head-Up Display Graphic Warning to Support Collision Avoidance: Effect of Graphic Animation and Border on Driving Behavior and Eye Movement Pattern
No full textSupplemental material, sj-docx-1-trr-10.1177_03611981221134628 for Head-Up Display Graphic Warning to Support Collision Avoidance: Effect of Graphic Animation and Border on Driving Behavior and Eye Movement Pattern by Yuwei Wang, Jiaqing Song, Xiaojiang An, Shu Ma, Hongting Li, Duming Wang and Zhen Yang in Transportation Research Record</p
sj-docx-1-npx-10.1177_1934578X211059645 - Supplemental material for Synthesis and Antitumor Activity of Evodiamine Derivatives With Nitro, Amino, and Methoxy Groups
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X211059645 for Synthesis and Antitumor Activity of Evodiamine Derivatives With Nitro, Amino, and Methoxy Groups by Ruolan Yang, Jingjing Ma, Hui Guo, Qinghua Meng, Yuwei Wang, Hao Yan, Ruyi Jin, Zhi Li and Lingjie Meng in Natural Product Communications</p
sj-pdf-1-trr-10.1177_03611981231196146 – Supplemental material for Are Warnings Suitable for Presentation in Head-Up Display? A Meta-Analysis for the Effect of Head-Up Display Warning on Driving Performance
No full textSupplemental material, sj-pdf-1-trr-10.1177_03611981231196146 for Are Warnings Suitable for Presentation in Head-Up Display? A Meta-Analysis for the Effect of Head-Up Display Warning on Driving Performance by Liuqingcheng Niu, Sike Gao, Jinlei Shi, Changxu Wu, Yuwei Wang, Shu Ma, Duming Wang, Zhen Yang and Hongting Li in Transportation Research Record</p
A Comprehensive Understanding of Machine Learning and Deep Learning Methods for 3D Architectural Cultural Heritage Point Cloud Semantic Segmentation
No full textAs a result of the development of Artificial Intelligence (AI) techniques, in recent years, machine learning (ML) and deep learning (DL) approaches have been widely used to semantically enrich 3D architectural cultural heritage (ACH) point clouds. While existing approaches for analyzing and interpreting point clouds continue to improve, the generalizability of pre-trained ML and DL methods to various types of historic buildings remains uncertain. In this context, a comprehensive understanding of both methodologies can enable us to make more effective use of AI techniques in the ACH domain (e.g., data exploitation, model definition, analysis, and preservation). This work presents and compares two very different approaches for the 3D ACH semantic segmentation task. Specifically, we train and test a ML method based on the Random Forest (RF) classifier on the point cloud of three chapels part of the “Sacromonte Calvario di Domodossola” and on the two test scenes of the ArCH dataset. Then, we employ dynamic graph convolutional neural network (DGCNN) as our DL method, training on the ArCH dataset and testing on both the two unseen test scenes of the ArCH dataset and on the “Sacrimonti” chapel point clouds. We provide empirical experiments to illustrate the efficiency of applying ML and DL methodologies to ACH point clouds. Following that, the advantages and limitations of these two approaches are evaluated through a systematic study of the classification results. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG
"They're the Same as Any Woman:" Professionals' Awareness of the Unique Needs of Mail Order Brides Who Experience Domestic Violence
No full textFaculty adviser: Dr. Steven M. Harris, Family Social ScienceMail order Brides (MOBs) are women who marry men through international marriage brokers. Usually, MOBs come from less developed countries than their husbands. In recent years, domestic violence in mail order marriages has been brought to public awareness. Although legal protection from government is in place, it is not always sufficient. Community resources, on the other hand, can be helpful for MOBs to escape from domestic violence. Therefore, in order to find out what community resources are available to MOBs who experience domestic violence, the author has conducted 10 interviews with professionals who work in different domestic violence service organizations in the Twin Cities area. This research suggests that only a small number of MOBs have utilized existing community resources. Cultural and language competency as well as an awareness of the unique needs of MOBs who experience domestic violence vary among organizations. Most professionals categorized MOBs as “Immigrants” and saw no difference between the needs of MOBs and those of either all women in general, or immigrant women in particular. Funding cuts and access to MOBs are the main barriers for most organizations in providing appropriate services. One interesting finding from the interviews is related to the term “Mail Order Brides;” as some who were interviewed saw MOBs as victims or other unwitting participants in the sex trafficking industry. This paper adds to our understanding of the unique needs of MOBs who experience domestic violence and whether or not community professionals are adequately prepared to assist them.This research was supported by the Undergraduate Research Opportunities Program (UROP).Wu, Yuwei. (2012). "They're the Same as Any Woman:" Professionals' Awareness of the Unique Needs of Mail Order Brides Who Experience Domestic Violence. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/123436
Tribocorrosion behaviors of multilayer PVD DLC coated 304L stainless steel in seawater
No full textThe multilayer DLC coating was successfully fabricated on the surface of 304L stainless steel and silicon wafers by unbalanced magnetron sputtering technology. The tribocorrosion tests were carried out in a triboelectrochemical cell using a ball-on-plate tribometer integrated with a potentiostat for electrochemical control. Results showed that the open circuit potential (OCP) and corrosion potential (E,) of 304L substrate presented great fluctuation. However, the OCP and values of the multilayer DLC coating remained relatively stable during these tests. Meanwhile, the friction coefficient decreased and the wear-loss increased with the polarization potential increased from -1 to 0.5 V. In addition, with an increase in polarization potential, the mechanical wear decreased obviously and the corrosion-induced wear gradually occupied a dominant position for 304L substrate, nevertheless, the mainly volume loss of the multilayer DLC coating was mainly attributed to pure mechanical wear. Thus, the tribocorrosion resistance of the multilayer DLC coating was superior to 304L substrate in seawater, manifesting its good potential as a protective material for marine industry
Surface characterization of carbonated recycled concrete fines and its effect on the rheology, hydration and strength development of cement paste
No full textCarbonation treatment can effectively improve the performance of recycled concrete aggregate and fines due to the reactions of CO2 with CH and C–S–H gel of cement paste. To better understand the mechanisms involved in the performance improvement, the surface properties of carbonated recycled cement paste powder (CRP) and its effect on the rheology, hydration and strength development of cement paste was studied. The results showed that during the carbonation, the surface of CRP was covered by a layer of amorphous silica gel. The generated CaCO3 was wrapt by the silica gel and seldom exposed. The silica layer led to the poor flowability of CRP-cement paste due to that the silica gel on the surface of CRP has a strong affinity for H2O. During the very early hydration, the silica gel dissolved and then CaCO3 was exposed. CaCO3 is capable of chemically absorbing Ca2+, which facilitated the nucleation of C–S–H nuclei and stabilized the C–S–H phase. As a result, the C–S–H grew densely, uniformly and perpendicularly on the surface of CRP. In addition, the chemically absorbing Ca2+ enabled the chemical bond to be formed between CaCO3 and C–S–H. Due to increased C–S–H resulted from reactions of silica gel with CH at the interface and the stronger bond formed between CaCO3 and C–S–H, the interface between CRP and hydration products was much stronger than that between recycled cement paste powder (RP) and hydration products.Accepted Author ManuscriptMaterials and Environmen
Scheduling of biological samples for DNA sequencing
Full text linkThesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2009.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Cataloged from student submitted PDF version of thesis.Includes bibliographical references (p. 95-97).In a DNA sequencing workflow, a biological sample has to pass through multiple process steps. Two consecutive steps are hydroshearing and library construction. Samples arrive randomly into the inventory and are to complete both processes before their due dates. The research project is to decide the optimal sequence of samples to go through these two processes subject to operational constraints. Two approaches, namely, heuristic and integer programming have been pursued in this thesis. A heuristic algorithm is proposed to solve the scheduling problem. A variant of the problem involving deterministic arrivals of samples is also considered for comparison purposes. Comparison tests between the two approaches are carried out to investigate the performance of the proposed heuristic for the original problem and its variant. Sensitivity analysis of the schedule to parameters of the problem is also conducted when using both approaches.by Yuwei Hu and Chin Soon Lim.S.M
Chloride diffusion of alkali-activated fly ash/slag concrete
No full textThe widespread application of alkali-activated fly ash/slag (AAFS) concrete requires satisfaction of a series of performance criteria both from its early age properties (e.g. workability, strength) and long-term stability. In this study, long-term (till 180 days) natural chloride diffusion tests were conducted to evaluate the chloride diffusion in AAFS concretes prepared with different slag content, water-binder (w/b) ratio, alkali content, and sandaggregate ratio. The results revealed that the free chloride diffusion coefficient (Df) of AAFS concretes was between 0.4-1.8×10-12 m2/s. The slag content and w/b were found as dominant parameters affecting the long-term chloride transport in AAFS concretes, while the sandaggregate ratio presented a limited effect. MIP results indicated that capillary pores in AAFS reached percolation and became disconnected after 180 days. The long-term chloride diffusivity of AAFS concretes was closely related to the threshold pore diameter and volume of pores > 5 nm. The more larger pores, the higher chloride diffusion coefficient was
Effect of Activator and Mineral Admixtures on the Autogenous Shrinkage of Alkali-Activated Slag/Fly Ash
No full textThe high autogenous shrinkage of alkali-activated fly ash/slag (AASF) poses a significant concern for the widespread application of AASF in structural engineering. The present study compares the efficacy of activator and mineral admixtures in mitigating the autogenous shrinkage of AASF, and discusses the underlying mechanism. The results show that the use of activators with a lower silicate modulus and a lower sodium content, as well as incorporating metakaolin (MK) or silica fume, can reduce the autogenous shrinkage of AAMs. These approaches delay the appearance of the second exothermic peak, which corresponds to the later formation of C-A-S-H gels and slower development of capillary pressure. The inclusion of MK not only retards the reaction but also facilitates the formation of N-A-S-H gels, resulting in a coarse pore structure and reduced water consumption. The use of the activator with a lower silicate modulus (reduced from 1.5 to 1.0) leads to a higher internal relative humidity and the reduced pore volume of silt-shaped and ink-bottle pores (2–50 nm) in AASF, thereby reducing the autogenous shrinkage without significant strength reduction.Materials and Environmen
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