Research Repository

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SDSS-IV MaNGA: star formation cessation in low-redshift galaxies I: dependence on stellar mass and structural properties (2018)
Journal Article
Wang, E., Li, C., Xiao, T., Lin, L., Bershady, M., Law, D. R., …Yan, R. (in press). SDSS-IV MaNGA: star formation cessation in low-redshift galaxies I: dependence on stellar mass and structural properties. Astrophysical Journal, 856(2), doi:10.3847/1538-4357/aab263. ISSN 0004-637X

We investigate radial gradients in the recent star formation history (SFH) of 1917 MaNGA galaxies with 0.01 < z < 0.14. For each galaxy, we obtain two-dimensional maps and radial profiles for three spectroscopically-measured parameters that are sensi... Read More

Does document relevance affect the searcher's perception 0f time? (2017)
Conference Proceeding
Luo, C., Liu, Y., Sakai, T., Zhou, K., Zhang, F., Li, X., & Ma, S. (2017). Does document relevance affect the searcher's perception 0f time?. In Proceedings of the Tenth ACM International Conference on Web Search and Data Mining - WSDM '17doi:10.1145/3018661.3018694

Time plays an essential role in multiple areas of Information Retrieval (IR) studies such as search evaluation, user behavior analysis, temporal search result ranking and query understanding. Especially, in search evaluation studies, time is usually... Read More

SDSS-IV MaNGA IFS galaxy survey—survey design, execution, and initial data quality (2016)
Journal Article
Yan, R., Bundy, K., Law, D. R., Bershady, M. A., Andrews, B., Cherinka, B., …Zheng, Z. (2016). SDSS-IV MaNGA IFS galaxy survey—survey design, execution, and initial data quality. Astronomical Journal, 152(6), doi:10.3847/0004-6256/152/6/197. ISSN 0004-6256

The MaNGA Survey (Mapping Nearby Galaxies at Apache Point Observatory) is one of three core programs in the Sloan Digital Sky Survey IV. It is obtaining integral field spectroscopy for 10,000 nearby galaxies at a spectral resolution of R ∼ 2000 from... Read More

The growth of the central region by acquisition of counterrotating gas in star-forming galaxies (2016)
Journal Article
Chen, Y., Shi, Y., Tremonti, C. A., Bershady, M., Merrifield, M., Emsellem, E., …Yan, R. (in press). The growth of the central region by acquisition of counterrotating gas in star-forming galaxies. Nature Communications, 7, doi:10.1038/ncomms13269. ISSN 2041-1723

Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, syste... Read More

A modified oil lubrication system with flow control to reduce crankshaft bearing friction in a litre 4 cylinder diesel engine (2016)
Conference Proceeding
Shayler, P. J., Cheng, L., Li, Q., & Wahab, E. (in press). A modified oil lubrication system with flow control to reduce crankshaft bearing friction in a litre 4 cylinder diesel engine. In SAE Technical Paper Seriesdoi:10.4271/2016-01-1045

The oil distribution system of an automotive light duty engine typically has an oil pump mechanically driven through the front-endancillaries-drive or directly off the crankshaft. Delivery pressure is regulated by a relief valve to provide an oil gal... Read More

SDSS-IV MaNGA: properties of galaxies with kinematically decoupled stellar and gaseous components (2016)
Journal Article
Jin, Y., Chen, Y., Shi, Y., Tremonti, C., Bershady, M., Merrifield, M., …Yan, R. (2016). SDSS-IV MaNGA: properties of galaxies with kinematically decoupled stellar and gaseous components. Monthly Notices of the Royal Astronomical Society, 463(1), doi:10.1093/mnras/stw2055. ISSN 0035-8711

We study the properties of 66 galaxies with kinematically misaligned gas and stars from MaNGA survey. The fraction of kinematically misaligned galaxies varies with galaxy physical parameters, i.e. M*, SFR and sSFR. According to their sSFR, we further... Read More

P-MaNGA: gradients in recent star formation histories as diagnostics for galaxy growth and death (2015)
Journal Article
Li, C., Wang, E., Lin, L., Bershady, M. A., Bundy, K., Tremonti, C., …Zheng, T. (2015). P-MaNGA: gradients in recent star formation histories as diagnostics for galaxy growth and death. Astrophysical Journal, 804(2), doi:10.1088/0004-637X/804/2/125. ISSN 0004-637X

We present an analysis of the data produced by the MaNGA prototype run (P-MaNGA), aiming to test how the radial gradients in recent star formation histories, as indicated by the 4000 ??break (Dn(4000)), H? absorption (EW(H?A)), and H? emission (EW(H?... Read More

Overview of the SDSS-IV MaNGA survey: mapping nearby galaxies at Apache Point Observatory (2014)
Journal Article
Bundy, K., Bershady, M. A., Law, D. R., Yan, R., Drory, N., MacDonald, N., …Zhang, K. (2014). Overview of the SDSS-IV MaNGA survey: mapping nearby galaxies at Apache Point Observatory. Astrophysical Journal, 798(1), doi:10.1088/0004-637X/798/1/7. ISSN 0004-637X

We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one of three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV) that began on 2014 July 1.... Read More

Virtual sensors for active noise control in acoustic–structural coupled enclosures using structural sensing: robust virtual sensor design (2011)
Journal Article
Halim, D., Cheng, L., & Su, Z. (2011). Virtual sensors for active noise control in acoustic–structural coupled enclosures using structural sensing: robust virtual sensor design. Journal of the Acoustical Society of America, 129(3), doi:10.1121/1.3531941. ISSN 0001-4966

The work was aimed to develop a robust virtual sensing design methodology for sensing and active control applications of vibro-acoustic systems. The proposed virtual sensor was designed to estimate a broadband acoustic interior sound pressure using s... Read More