Search

Your search keyword '"Han, Ray"' showing total 328 results
Start Over Author "Han, Ray"
328 results on '"Han, Ray"'

1. Phylogeny of Twenty-One Mammals

Author

Han, Ray

Subjects
Quantitative Biology - Populations and Evolution
Abstract

Phylogeny can be inferred using two sources of data from an organism: morphological data and molecular data. Historically, phylogenies were usually inferred using morphological characters, but some morphological features may not necessarily indicate shared heritage. With the introduction of molecular phylogenies, the base sequence of genes, or amino acid sequence of proteins can be compared to find the number of similarities or differences to ascertain levels of relatedness between species. These two types of phylogenies are to be taken as a data-driven hypothesis about the evolutionary history of the studied organisms, and a consensus is drawn from the comparison between the different phylogenies built from the two sources of data, utilizing different methods.

Published
2023

15. Gold Nanobipyramid-Based Photothermal Sensors for the Portable Evaluation of Total Antioxidant Capacity.

Author

Huang, Jiahui, Jiang, Fan, Zhao, Zhe, Li, Zhixin, Deng, Xiaoyu, Han, Ray P. S., Xu, Shaohua, Tao, Yingzhou, and Lin, Zhenyu

Abstract

Antioxidants are highly effective in preventing oxidative damage and reducing the risk of various diseases. To comprehensively evaluate the antioxidant content in food or nutrients, simple, portable, and cost-effective assays must be developed for measuring the total antioxidant capacity (TAC). In this study, gold nanobipyramids (AuNBPs) with a tunable photothermal effect were utilized as a probe to develop a straightforward method for photothermally sensing and assessing the TAC. Owing to the high refractive sensitivity of AuNBPs, antioxidant-triggered silver deposition induced drastic changes in their absorption spectra and photothermal effects. By this means, the TAC information can be converted into temperature signals easily captured using an affordable portable thermal camera. With our photothermal sensing strategy, the detection limit for ascorbic acid (a model antioxidant) is 0.08 μM, within the linear range of 0.1–100 μM. Furthermore, our method was successfully applied in practical applications for evaluating the TAC in honey and vitamin C tablets. The developed AuNBP-based photothermal assay exhibits considerable potential for portably assessing TAC. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

29. Real Time Dynamics and Control of a Digital Human Arm for Reaching Motion Simulation

Author

Yu, Huijie, Han, Ray P. S., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Dough, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Pan, Zhigeng, editor, Cheok, Adrian, editor, Haller, Michael, editor, Lau, Rynson W. H., editor, Saito, Hideo, editor, and Liang, Ronghua, editor

Published
2006
Full Text
View/download PDF

30. A Genetic Algorithm with Elite Crossover and Dynastic Change Strategies

Author

Zhou, Yuanpai, Han, Ray P. S., Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Lipo, editor, Chen, Ke, editor, and Ong, Yew Soon, editor

Published
2005
Full Text
View/download PDF

31. Advances in Microfluidic Technologies for Energy Storage and Release Systems

Author

Cheng, Samuel Kok Suen, primary, Li, Tong, additional, Meena, Stephene Shadrack, additional, Cao, Qianan, additional, Li, Binglin, additional, Kosgei, Benson Kiprono, additional, Cheng, Tingjun, additional, Luo, Ping, additional, Liu, Qingjun, additional, Zhu, Genhua, additional, Liu, Qian, additional, and Han, Ray P.S., additional

Published
2022
Full Text
View/download PDF

33. Enhancing exciton diffusion by reducing energy disorder in organic solar cells

Author

Xue, Peiyao, primary, Calascibetta, Adiel M., additional, Chen, Kai, additional, Thorn, Karen E., additional, Jiang, Yiting, additional, Shi, Jiangjian, additional, Jia, Boyu, additional, Li, Mengyang, additional, Xin, Jingming, additional, Cai, Guilong, additional, Yang, Rui, additional, Lu, Heng, additional, Mattiello, Sara, additional, Liu, Yao, additional, Tang, Zheng, additional, Ma, Wei, additional, Lu, Xinhui, additional, Meng, Qingbo, additional, Hodgkiss, Justin M., additional, Beverina, Luca, additional, Han, Ray P. S., additional, and Zhan, Xiaowei, additional

Published
2022
Full Text
View/download PDF

37. Room Temperature VOCs Sensing with Termination‐Modified Ti 3 C 2 TxMXene for Wearable Exhaled Breath Monitoring

Author

Li, Xin, primary, An, Zijian, additional, Lu, Yanli, additional, Shan, Jianzhen, additional, Xing, Huan, additional, Liu, Guang, additional, Shi, Zhenghan, additional, He, Yan, additional, Chen, Qingmei, additional, Han, Ray P. S., additional, Wang, Di, additional, Jiang, Jing, additional, Zhang, Fenni, additional, and Liu, Qingjun, additional

Published
2021
Full Text
View/download PDF

38. Mapping Gene Expression in the Spatial Dimension

Author

Chen, Yingwen, primary, Qian, Weizhou, additional, Lin, Li, additional, Cai, Linfeng, additional, Yin, Kun, additional, Jiang, Shaowei, additional, Song, Jia, additional, Han, Ray P. S., additional, and Yang, Chaoyong, additional

Published
2021
Full Text
View/download PDF

40. East Mall Redesign between Agronomy Road and W16th Avenue

Author

Bajwa, Deepinder, Han, Ray, Hu, Johnson, Mai, Thomson, Moy, Bastien, and Tam, Kyle

Abstract

Our team has been retained by UBC Social Economic Development Studies (UBC SEEDS) to redesign East Mall between Stadium Road and Agronomy Road in attempt to better accommodate sustainable transportation modes. The corridor’s current conditions do not accommodate the high amount of pick-up/dropoff traffic during the evenings, and do not promote sustainable modes of transportation. This report will provide and in-depth review for the detailed design of the transportation, structural, municipal, and environmental disciplines. Our recommended concept involves shifting the existing median East to separate vehicle travel lanes and bike lanes, reconfiguring the intersection of Thunderbird Boulevard and East Mall and upgrading the existing signal, and widening the segment from Thunderbird Boulevard to Agronomy Road to accommodate a new bi-directional bike lane. This design will improve the safety of cyclists, provide an abundance of green space for pedestrians, and reduce conflicts between vehicles and cyclists at drop-off pick-up zones while retaining parking for residents and users of the nearby facilities. An assessment of the existing utilities was conducted to identify impacts on the existing utility networks. The proposed reconfiguration is not expected to affect the system demands the water distribution and sanitary sewer systems. A stormwater management strategy has been developed on site, and the final corridor reduces the captured stormwater volumes within the project area. Specifications for the new permeable concrete cycling lanes and sidewalks have been developed, including an aggregate reservoir base to detain major storm flows for natural infiltration into the subgrade. The new pedestrian canopy consists of W200x31 section profiles for the columns and cantilevers with tempered glass panels mounted as the decking. The structure is 66.86-metres in length and will be constructed along the South side of Agronomy Road. The greenspace consists of the plantation of several new tree species to further improve the aesthetic of the corridor. Additionally, the greenspace has a community garden composed of various flowers to encourage people to gather and enjoy the surrounding landscape hence building the community. Estimated budget for the proposed solution will be $5,163,449 which includes labour, materials, operation & maintenance and a 15% contingency. Construction work will begin on May 2021 with a completion date of December 2021 with a duration of around 9 months. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”

Published
2021
Full Text
View/download PDF

43. Microfluidic Assaying of Circulating Tumor Cells and its Correlation with Muscle Invasiveness and Tumor Grade of Urothelial Bladder Cancer

Author

Fu, Guanghou, primary, Cheng, Kok Suen, additional, Chen, Anqi, additional, Xu, Zhijie, additional, Chen, Xiaoyi, additional, Tian, Junjie, additional, Xu, Congcong, additional, Sun, Yukun, additional, Neoh, Kuang Hong, additional, Dai, Yun, additional, Han, Ray P.S., additional, and Jin, Baiye, additional

Published
2021
Full Text
View/download PDF

44. Room Temperature VOCs Sensing with Termination‐Modified Ti3C2Tx MXene for Wearable Exhaled Breath Monitoring.

Author

Li, Xin, An, Zijian, Lu, Yanli, Shan, Jianzhen, Xing, Huan, Liu, Guang, Shi, Zhenghan, He, Yan, Chen, Qingmei, Han, Ray P. S., Wang, Di, Jiang, Jing, Zhang, Fenni, and Liu, Qingjun

Subjects
MEDICAL electronics, WEARABLE technology, WATER vapor, VOLATILE organic compounds
Abstract

Room temperature volatile organic compounds (VOCs) sensors usually suffer from severe humidity interference and insufficient sensitivity against VOCs, which greatly restricts its practical applications. Herein, the authors simultaneously reduce the hydrophilicity while improving the VOCs sensitivity of Ti3C2Tx MXene by introducing hydrocarbon terminations. The termination‐modified Ti3C2Tx (Ti3C2Tx‐M2) sensor demonstrates fivefold enhancement in ethanol sensitivity at room temperature, while response against water vapor has been reduced by 71% compared with pristine Ti3C2Tx. In addition, the modification also contributes to the arrest of sensor degradation that refines the sensing stability. On this basis, the MXene‐based VOCs sensor is employed for in situ, real‐time monitoring of exhaled ethanol as a proof‐of‐concept by integrating it with a wearable detection tag. Owing to the suppressed humidity interference and amplified VOCs response, the Ti3C2Tx‐M2 sensor could dynamically track the exhaled ethanol variations after alcohol intake. This work not only demonstrates a facile modification strategy to promote the sensitivities of MXene‐based VOCs sensor, but also a promising scheme for facile breath analysis, shedding lights on MXene‐based wearable medical electronics and intelligent healthcare. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results