28,754 research outputs found
Astrocyte dysfunction drives abnormal resting-state functional connectivity in depression
No full textMajor depressive disorder (MDD) is a devastating mental disorder that affects up to 17% of the population worldwide. Even though brain-wide network-level abnormalities in MDD patients via resting-state functional MRI (rsfMRI) exist, the mechanisms underlying such network changes are unknown despite their immense potential for depression diagnosis and management. Here, we show that the astrocytic calcium deficient mice, inositol 1,4,5-trisphosphate-type-2 receptor knockout mice (Itpr2-/- mice), display abnormal rsfMRI functional connectivity (rsFC) in depression-related networks, especially decreased rsFC in mPFC-related pathways. We further uncover rsFC decreases in MDD patients highly consistent with those of Itpr2-/- mice, especially in mPFC-related pathways. Optogenetic activation of mPFC astrocytes partially enhances rsFC in depression-related networks in both Itpr2-/- and wild-type mice. Optogenetic activation of the mPFC neurons or mPFC-striatum pathway rescues disrupted rsFC and depressive-like behaviors in Itpr2-/- mice. Our results identify the previously unknown role of astrocyte dysfunction in driving rsFC abnormalities in depression
sj-docx-1-ahd-10.1177_00914150241235088 - Supplemental material for Intergenerational Caregiving Patterns and Cognitive Health among the Sandwich Generation Within Four-Generation Families
No full textSupplemental material, sj-docx-1-ahd-10.1177_00914150241235088 for Intergenerational Caregiving Patterns and Cognitive Health among the Sandwich Generation Within Four-Generation Families by Jiaming Shi, Denghao Zhang and Xiaoting Liu in The International Journal of Aging and Human Development</p
Autonomous Driving Segway Robots
No full textIn this thesis, an autonomous driving robot has been proposed and built based on a two-wheel Segway self-balancing scooter. Sensors including LiDAR, camera, encoder, and IMU were implemented together with digital servos as actuators. The robot was tested simultaneously with the functionality features including obstacle avoidance based on fuzzy logic and 2D grid map, data fusion based on co-calibration, 2D simultaneously localization and mapping (SLAM) and path planning under different scenarios both indoor and outdoor. As a result, the robot initially has the ability of self-exploration with avoiding obstacles and constructing 2D grid map simultaneously. A simulation of the robot with same functionalities except data fusion has also been tested and performed based on robot operating system (ROS) and Gazebo as the simple comparison of the robot in real world.Master of Science in Engineering (MSE)Electrical Engineering, College of Engineering & Computer ScienceUniversity of Michigan-Dearbornhttp://deepblue.lib.umich.edu/bitstream/2027.42/167349/1/Jiaming Liu - Final Thesis.pd
Liu Kang
No full textLiu Kang: Essays on Art and Culture is a testament to the inexorable passion of an artist who knew no boundaries. This collection of essays, which Liu Kang wrote over 44 years, offers an insight into the artist’s myriad interests as well as his contributions as a first generation Nanyang artist and art educator. Translated into English for this volume, Liu Kang’s essays are accompanied by commentaries and photographs of the artist-author and his subjects
Over 240 resonances on a metasurface-pixelated silicon wafer in an octave-spanning terahertz range
No full textMetasurfaces hold tremendous promise for various innovative sensing applications, thanks to their remarkable ability to manipulate light. A recent significant advancement in this research direction is using quasi-BIC (bound states in the continuum) metasurfaces for mid-infrared molecular sensing, which relies on creating a series of nearly uniformly spaced, sharp resonances on a single device. Although many studies have highlighted the potential of adopting this method in the terahertz (THz) regime, experimental demonstration is lacking. In this work, the first experimental demonstration of such frequency comb-like, quasi-BIC resonances on a single device is presented in the THz regime. By pixelating a 6-inch Si wafer with 25 different metasurfaces that possess both high-order quasi-BIC modes and a geometric scaling, a set of 241 sharp resonances ranging from 350 to 750 GHz is produced based on numerical simulation. By using a high-resolution vector network analyzer, 140 peaks that fall into the detection range from 500 to 750 GHz are confirmed experimentally, and their frequencies match well with the simulated results. By experimentally demonstrating frequency comb-like, quasi-BIC THz resonances on a single device, this work shows a new path for metasurface-based sensing in the THz regime.</p
Retraction notice to “Company financial path analysis using fuzzy c-means and its application in financial failure prediction” [Journal of Business Economics and Management, 19(1), 213-234, 2018]
No full textThe following article will be retracted from publication in Journal of Business Economics and Management:
Company financial path analysis using fuzzy c-means and its application in financial failure prediction by Jiaming Liu and Chong Wu, Volume 19, Issue 1, pp. 213-234, Journal of Business Economics and Management, 2018,
https://doi.org/10.3846/16111699.2017.1415959
https://journals.vgtu.lt/index.php/JBEM/article/view/1606
Received 17 September 2017, accepted 7 December 2017,
since there are presented some paraphrased ideas with slight changes from published article
Predicting corporate bankruptcy using a self-organizing map: An empirical study to improve the forecasting horizon of a financial failure model, by Philippe du Jardin and Eric Séverin, Volume 51, Issue 3, pp. 701-711, Decision Support Systems, 2011,
https://doi.org/10.1016/j.dss.2011.04.001
Received 15 September 2010, accepted 11 April 2011.
The Editors and publishers of the journal, Vilnius Gediminas Technical University, note that we received, peer-reviewed, accepted and published the article on the basis that the authors are presenting original results.
The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as “retracted”
CCDC 1557570: Experimental Crystal Structure Determination
No full textBIKMEQ02 : catena-[tris(μ-1,3-bis(4-carboxylatophenyl)benzene)-bis(μ-hydroxo)-bis(μ-oxo)-tri-zirconium(iv) N,N-dimethylformamide solvate hemihydrate] Space Group: R 3 (148), Cell: a 30.487(4)Å b 30.487(4)Å c 15.094(3)Å, α 90.00° β 90.00° γ 120.00° Related Article: Xiaodong Sun, Xu Li, Shuo Yao, Rajamani Krishna, Jiaming Gu, Guanghua Li, Yunling Liu|2020|J.Mater.Chem.A|8|17106|doi:10.1039/D0TA04778
Phoebus 10: A Journal of Art History
No full texttableOfContents: Homage to the Past: The Art of Yin Xiaofeng by Ralph Gabbard and Liu Liu.. pages 5-1
Cultural exploitation in chinese politics: Reinterpreting liu sanjie
No full textLiu Sanjie is a typical Chinese legendary figure, adapted from folk custom and transformed during many historical and political stages. By comparing the musical film Liu Sanjie with the landscape performing art Impression Liu Sanjie, this paper explores how Liu Sanjie is reconstructed in the Impression to be in accord with contemporary demands (shidaixing). In the film, made during the 1960s, Liu Sanjie was promoted as a heroine fighting against the privileged classes, but in the Impression, her class struggle has been erased and only a harmonious and abstract legend remains. Her ethnicity is promoted by Han elites as not exclusive Zhuang, but shared equally with Han, Miao and Dong ethnicity in an imagined community to propagate a sense of ethnic harmony and unified Chineseness. Her transformation from a realistic character, full of a rebelling spirit, to an abstract and disembodied ‘sense of harmony’, is a complete reinterpretation of a Chinese historical legend. Utilizing a term from Wang Ban (1997), ‘the sublime figure of history’, which refers to an ideology aestheticized by the party state for securing its governance, this paper refers to the bold artistic treatment of Liu Sanjie for cultural exploitation as ‘Liu Sanjie’s sublime’. The paper explores the evolutionary progress of Liu Sanjie from class revolution to art revolution in response to political requirements. The author is a stage-trained performing artist, specialized in both Western opera and Chinese classical and folk singing and dance. He is also a critic and art consultant in the Chinese landscape performing arts industry. These professional roles have allowed privileged access to the top people in this industry
Amplitude gradient-based metasurfaces for off-chip terahertz wavefront shaping
No full textMetasurfaces provide an effective technology platform for manipulating electromagnetic waves, and the existing design methods all highlight the importance of creating a gradient in the output phase across light scattering units. However, in the emerging research subfield of meta-waveguides where a metasurface is driven by guided modes, this phase gradient-oriented approach can only provide a very limited emission aperture, significantly affecting the application potential of such meta-waveguides. In this work, we propose a new design approach that exploits the difference between meta-atoms in their light scattering amplitude. By balancing this amplitude gradient in the meta-atoms against the intensity decay in the energy-feeding waveguide, a large effective aperture can be obtained. Based on this new design approach, three different wavefront shaping functionalities are numerically demonstrated here on multiple devices in the terahertz regime. They include beam expanders that radiate a plane wave, where the beam width can increase by more than 900 times as compared to the guided wave. They also include a metalens that generates a Bessel-beam focus with a width 0.59 times the wavelength, and vortex beam generators that emit light with a tunable topological charge that can reach −30. This amplitude gradient design approach could benefit a variety of off-chip light shaping applications such as remote sensing and 6G wireless communications.</p
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