A5062166205- Polymer crystallization and properties
- Polymer Nanocomposites and Properties
- Urban, Neighborhood, and Segregation Studies
- Housing Market and Economics
- Human Mobility and Location-Based Analysis
- biodegradable polymer synthesis and properties
- Urbanization and City Planning
- Urban Transport and Accessibility
- Geographic Information Systems Studies
- Land Use and Ecosystem Services
- Polymer Foaming and Composites
- Polymer Nanocomposite Synthesis and Irradiation
- Impact of Light on Environment and Health
- Policing Practices and Perceptions
- Mechanical Behavior of Composites
- Advanced Sensor and Energy Harvesting Materials
- Rock Mechanics and Modeling
- High-Velocity Impact and Material Behavior
- Microplastics and Plastic Pollution
- Research Data Management Practices
- Geography Education and Pedagogy
- Economic and Technological Innovation
- Polymer composites and self-healing
- NF-κB Signaling Pathways
- Silicone and Siloxane Chemistry
Cornell University
2023-2025
Guangxi University of Chinese Medicine
2023-2024
Northeastern University
2023
The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine
2023
Columbia University
2019-2021
Massachusetts Institute of Technology
2016-2019
Shandong Entry-Exit Inspection and Quarantine Bureau
2017
Sichuan University
2009-2016
Dalian Polytechnic University
2011
North China Institute of Science and Technology
2008-2010
How did institutionalized discriminatory lending policies implemented under the guidance of Federal Housing Administration (FHA)'s mortgage risk maps impact neighborhood trajectories? Have these spatially restrictive credit designations influenced home value, homeownership, and racial segregation? Using FHA map Chicago, Illinois, for new loan guarantees as a case study, I measure outcomes between zones compare regions with Home Owners' Loan Corporation (HOLC) Residential Security Maps, which...
Superior toughness has been achieved in the nylon-6/PVDF blends with semicrystalline PVDF component as dispersed particles. Morphological observations on impact tested specimens unambiguously reveal formation of voids and microfibrils across fracture surface, suggesting that some extent plastic deformation occurs within ductile It is further confirmed by structural evolution at crack tips through micro-FTIR studies quasi-static stretching precracked films. During α → β phase transformation...
This research uses high-density anonymised mobile phone application (MPA) global-positioning system (GPS) data to describe exposure racial diversity in different social contexts with an aim clarify the mechanism linking residential opportunities for diverse interactions. In particular, it explores hypothesis that a context does not lead contact by comparing three measures – residential, observed and interaction on census block group level Chicago. doing so, also contribution of activity...
This paper exploits the potential of Global Positioning System datasets sourced from mobile phones to estimate racial composition road users, leveraging data their respective Census block group. The encompasses approximately 46 million trips in Chicago metropolitan region. research focuses on relationship between camera tickets and drivers vs. police stops for traffic citations these locations. Black exhibit a higher likelihood being ticketed by automated speed cameras stopped moving...
Abstract Despite the importance of measuring racial-ethnic segregation and diversity in United States, current measurements are largely based on Census and, thus, only reflect as understood through residential location. This leaves out social contexts experienced throughout course day during work, leisure, errands, other activities. The National Experienced Racial-ethnic Diversity (NERD) dataset provides estimates for entire States at census tract level range place times when people have...
ABSTRACT GIS and GIScience education have continually evolved over the past three decades, responding to technological advances societal issues. Today, content context in which is taught continue be impacted by these disruptions, notably from technology through artificial intelligence (AI) society myriad environmental social challenges facing planet. These disruptions create a new landscape for training within discipline that affecting not only what courses but also who taught, why it being...
ADVERTISEMENT RETURN TO ISSUEPREVNoteAnnealing-Induced Oriented Crystallization and Its Influence on the Mechanical Responses in Melt-Spun Monofilament of Poly(l-lactide)Bing Na*, Nana Tian, Ruihua Lv, Shufen Zou, Wenfei Xu, Qiang Fu*View Author Information Department Materials Science Engineering, East China Institute Technology, Fuzhou 344000, People's Republic Polymer & Materials, Sichuan University, State Key Laboratory Chengdu 610065, China*Corresponding authors: Fax 0086-794-8258320,...
In this article, molecular orientation of crystalline and amorphous phases both linear low-density polyethylene (LLDPE) isotactic polypropylene (iPP) epitaxy in the LLDPE/iPP blends prepared via dynamic packing injection molding have been investigated with aid polarized Fourier transform infrared (FTIR) spectroscopy two-dimensional X-ray scattering (2D-WAXS). LLDPE-rich blends, LLDPE was oriented along shear flow direction, iPP kept very low orientation. No epitaxial growth between observed....
The field of urban analytics and city science has seen significant growth development in the past 20 years. rise data science, both industry academia, put new pressures on research, but also allowed for analytical possibilities. Because rapid change field, terminology can be vague unclear. This paper, an abridged synthesis a panel discussion among scholars Urban Data Science held at 2019 American Association Geographers Conference Washington, D.C., outlines one seeking better sense...
To discover ulcerative colitis (UC) treatment agents, 28 oleanane-type triterpenoid saponins (1–28) including three new saponins, pulsatillosides P-R (1–3), were isolated from Pulsatilla chinensis. The could observably ameliorate UC by improving the intestinal epithelial cell barrier and flora in vivo. structure–activity relationship indicated that oligosaccharide chain at C-28 was essential for their anti-UC activities; methyl group C-23 site of triterpene showed important effects on...
Irradiation of ultrahigh molecular weight polyethylene (UHMWPE) with a dose 150 kGy by an electron beam can effectively increase the entanglement density in amorphous phase and has little influence on properties crystalline phase, which provides examples to comparatively investigate role lamellar coupling determining strain-hardening effect semicrystalline polymers. The modulus, deduced from Haward plots true stress-strain curves, is inversely temperature-dependent sharp transition around 65...
Abstract Oriented high‐density polyethylene (HDPE), prepared by melt extrusion drawing, has been employed to address the correlation between cavitation and lamellar fragmentation at large strain. This done investigating volume strain, elastic recovery properties, microscopic morphology. The results indicate that reversible strain becomes saturation a true of about 0.3, which is essentially consistent with critical one related (point C). Morphological observations on deformed samples provide...
Abstract BACKGROUND: It is a challenge for polymer processing to promote the formation of γ‐phase under atmospheric conditions in isotactic polypropylene (iPP) copolymer containing chain errors. Incorporation an α‐nucleator iPP seems reasonable since it can enhance non‐isothermal crystallization. Up now, however, issue regarding β‐nucleated still remains unclear, which subject this study. RESULTS: The results indicate that indeed occurs random with ethylene co‐unit (PPR) sample and becomes...
Abstract A micro‐FTIR measurement has been conducted to explore the molecular orientation of amorphous phase in nylon 6/clay nanocomposite at large strain. Our results indicate that such a during stretching is lower than observed for pure 6 counterpart, which further evidenced by true stress‐strain dependence. The relaxation network, resulted from destruction γ‐crystals part and mostly microvoding (demonstrated volume dilatation 2D‐SAXS measurements), should be responsible suppressed...
In conventional rheological and mechanical tests, particle‐particle interactions in the filler network are always entangled with polymer‐particle ones, thus knowledge of their relative role viscoelasticity filled elastomer is still lacking. this study, a strain‐dependent, electrical conductivity measurement during cyclic deformation was adopted for first time to elucidate elastomers, since only depends on network. The results indicate that percolating carbon black (CB) broken down under...
This paper exploits the potential of Global Positioning System datasets sourced from mobile phones to estimate racial composition road users, leveraging data their respective Census block group. The encompasses approximately 46 million trips in Chicago metropolitan region. research focuses on relationship between camera tickets and drivers vs. police stops for traffic citations these locations. Black exhibit a higher likelihood being ticketed by automated speed cameras stopped moving...
Abstract The polymorphic transition (γ → α conversion) in a single nylon 6 filament under stretching has been explored for the first time by using micro‐FT‐IR spectroscopy. content of γ‐form deceases with straining while amount α‐form gradually increases, suggesting γ conversion. A two‐step mechanism, that is, melting and recrystallization, seems pertinent conversion considering shows somewhat reversible keeps nearly intact upon unloading. Moreover, stress‐induced at large strain can be well...
Abstract The important role of network relaxation in the voiding and fracture toughness isotactic polypropylene (iPP) has been explored with video‐aid tensile tests, two‐dimensional small‐angle X‐ray scattering (2D‐SAXS) measurements, morphological observations. results indicated that macroscopic volume dilatation related to became lower during large deformation iPP sample rich γ phase (denoted as γ‐iPP) cooled at 1°C/min, compared one exclusive α form (referred α‐iPP) quenched air....
This article analyzes the regional variation in outcomes of a seemingly standardized federal neighborhood valuation principle used home mortgage insurance grading. The objective is to highlight contingent discriminatory and economic conditions that mediated heterogeneous housing across different parts United States. How did city demographic growth patterns vary before during program implemented through Federal Housing Administration (FHA)? might this have shaped loan guarantee patterns? does...
A study on the mechanism for degraded toughness in nylon 6/clay nanocomposite is explored this Article. Such a exhibits lower specific essential work of fracture we and nonessential βwp than its pure 6 counterpart, as revealed by (EWF) measurements. Furthermore, molecular orientation small region (20 × 20 μm2) ahead crack tip, obtained from micro-FTIR measurements first time, found to be during initiation propagation. The decreased orientation, mostly resulted severe microvoiding at tips,...
The conformational and polymorphic transformations in the melt-spun monofilament of syndiotactic polypropylene upon annealing subsequent stretching have been first explored by micro-FTIR studies. results indicate that as-spun gives rise to an unusual increase molecular orientation helical conformations both amorphous phase ordered crystals as a result structural transitions transplanar ones well mesophase crystals. increased annealed is mainly responsible for enhanced strength during...