Search

Your search keyword '"Butt, Haider"' showing total 626 results
Start Over Author "Butt, Haider"
626 results on '"Butt, Haider"'

54. Photonic hydrogel sensors

Author

Yetisen, Ali K., Butt, Haider, Volpatti, Lisa R., Pavlichenko, Ida, Humar, Matjaž, Kwok, Sheldon J.J., Koo, Heebeom, Kim, Ki Su, Naydenova, Izabela, Khademhosseini, Ali, Hahn, Sei Kwang, and Yun, Seok Hyun

Published
2016
Full Text
View/download PDF

57. Holographic Liquid Crystals for Nanophotonics

Author

Wilkinson, Timothy D., Butt, Haider, Montelongo, Yunuen, Avouris, Phaedon, Series editor, Bhushan, Bharat, Series editor, Bimberg, Dieter, Series editor, von von Klitzing, Klaus, Series editor, Sakaki, Hiroyuki, Series editor, Wiesendanger, Roland, Series editor, and Li, Quan, editor

Published
2014
Full Text
View/download PDF

61. Optical Fiber Sensors: Working Principle, Applications, and Limitations

Author

Elsherif, Mohamed, primary, Salih, Ahmed E., additional, Muñoz, Monserrat Gutiérrez, additional, Alam, Fahad, additional, AlQattan, Bader, additional, Antonysamy, Dennyson Savariraj, additional, Zaki, Mohamed Fawzi, additional, Yetisen, Ali K., additional, Park, Seongjun, additional, Wilkinson, Timothy D., additional, and Butt, Haider, additional

Published
2022
Full Text
View/download PDF

75. Healthcare Applications of pH-Sensitive Hydrogel-Based Devices: A Review

Author

Hendi, Asail, Umair Hassan, Muhammad, Elsherif, Mohamed, Alqattan, Bader, Park, Seongjun, Yetisen, Ali Kemal, and Butt, Haider

Subjects
biomedical applications, Wound Healing, technology, industry, and agriculture, biocompatible, pH-sensitive, Hydrogels, macromolecular substances, Review, Hydrogen-Ion Concentration, sensors, complex mixtures, Bandages, Drug Liberation, Drug Delivery Systems, Animals, Food Industry, Humans
Abstract

pH-sensitive hydrogels have been developed greatly over the past few years. This has been possible due to the synthesis of new hydrogel systems with increased sensitivity – a sensitivity of up to 10−5 pH units has already been established. Recently, pH-sensitive hydrogels have shown to be very useful in biomedical applications, such as targeted cancer treatment and treatment of skin lesions. Prolonged drug release has been made available through the use of such hydrogels. The synthesis of pH-sensitive hydrogels is also quick and cost-effective. This review presents a background on the properties of pH-sensitive hydrogels and discusses some of the hydrogels with different sensitivity ranges and their possible applications. A range of synthesis processes have also been briefly introduced along with the fabrication of different structures such as microcantilevers and contact lenses.

Published
2020

79. Photonic Materials for Holographic Sensing

Author

Zawadzka, Monika, primary, Mikulchyk, Tatsiana, additional, Cody, Dervil, additional, Martin, Suzanne, additional, Yetisen, Ali Kemal, additional, Martinez-Hurtado, Juan Leonardo, additional, Butt, Haider, additional, Mihaylova, Emilia, additional, Awala, Hussein, additional, Mintova, Svetlana, additional, Yun, Seok Hyun, additional, and Naydenova, Izabela, additional

Published
2015
Full Text
View/download PDF

83. Ophthalmic Sensors and Drug Delivery

Author

Dennyson Savariraj, Antonysamy, primary, Salih, Ahmed, additional, Alam, Fahad, additional, Elsherif, Mohamed, additional, AlQattan, Bader, additional, Khan, Ammar A., additional, Yetisen, Ali K., additional, and Butt, Haider, additional

Published
2021
Full Text
View/download PDF

84. Integration of paper microfluidic sensors into contact lenses for tear fluid analysis

Author

Moreddu, Rosalia, Elsherif, Mohamed, Adams, Hadie, Moschou, Despina, Cordeiro, Maria F., Wolffsohn, James S., Vigolo, Daniele, Butt, Haider, Cooper, Jonathan M., and Yetisen, Ali K.

Abstract

In this article, using the integration of paper microfluidics within laser-inscribed commercial contact lenses, we demonstrate the multiplexed detection of clinically relevant analytes including hydrogen ions, proteins, glucose, nitrites and l-ascorbic acid, all sampled directly from model tears. In vitro measurements involved the optimization of colorimetric assays, with readouts collected, stored and analyzed using a bespoke Tears Diagnostics smartphone application prototype. We demonstrate the potential of the device to perform discrete measurements either for medical diagnosis or disease screening in the clinic or at the point-of-care (PoC), with future applications including monitoring of ocular infections, uveitis, diabetes, keratopathies and assessing oxidative stress.

Published
2020

92. 3D Printed Contact Lenses

Author

Alam, Fahad, primary, Elsherif, Mohamed, additional, AlQattan, Bader, additional, Salih, Ahmed, additional, Lee, Sung Mun, additional, Yetisen, Ali K., additional, Park, Seongjun, additional, and Butt, Haider, additional

Published
2021
Full Text
View/download PDF

95. Smartphone-based colorimetric detection system for portable health tracking

Author

Balbach, Samira, primary, Jiang, Nan, additional, Moreddu, Rosalia, additional, Dong, Xingchen, additional, Kurz, Wolfgang, additional, Wang, Congyan, additional, Dong, Jie, additional, Yin, Yixia, additional, Butt, Haider, additional, Brischwein, Martin, additional, Hayden, Oliver, additional, Jakobi, Martin, additional, Tasoglu, Savas, additional, Koch, Alexander W., additional, and Yetisen, Ali K., additional

Published
2021
Full Text
View/download PDF

97. Facet-Time: Using Information Seeking Strategies to Support Exploration of Time Series Data

Author

Butt, Haider Ali, Hoeber, Orland, Hamilton, Howard, Maguire, R. Brien, and Oriet, Christopher

Abstract

A Thesis Submitted to the Faculty of Graduate Studies and Research In Partial Fulfillment of the Requirements for the Degree of Master of Science in Computer Science, University of Regina. xiv, 122 p. The notion of time has important value in people’s lives. By analyzing timeoriented data, we can understand underlying trends in the data. Graphically representing the data is useful for analysis because a single visualization can represent much information. Some tools providing visualizations for time-series data are well supported for lookup tasks; however, their support for exploratory search tasks are minimal. In exploratory search tasks, users may not have a specific search goal or they may have ill-defined information needs. They usually learn by iterating through and interpreting search results and perform investigation over them before integrating the obtained information into their knowledge. In this thesis, an analytical tool (Facet-Time) is proposed that supports users in analyzing temporal data with a specific focus on supporting exploratory search. Facet-Time utilizes information visualization and interactive techniques to help users in finding information they are seeking and satisfying their search goals. It allows users with ambiguous search goals to interactively gain information about the search results. Facet-Time provides information scent support to assist users in choosing their path of exploration while they are defining queries. It also provides the visualization of time-series data where users can analyze the data and also make comparisons of subsets of data. User evaluations were conducted to validate the design variations and features of Facet-Time. The outcome of the evaluations gave mostly mixed results, i.e., some experimental measures have significant value for some variations of Facet- Time and some measures do not have much significance. Improvements were observed in three subjective measures (usefulness, ease of use, and satisfaction) when using the sparklines feature versus when using no sparklines feature. Student yes

Published
2019

98. Carbon Nanotube Array Based Binary Gabor Zone Plate Lenses

Author

Deng, Sunan, Jwad, Tahseen, Li, Chi, Benton, David, Yetisen, Ali K., Jiang, Kyle, Dai, Qing, and Butt, Haider

Subjects
Multidisciplinary Sciences, Science & Technology, genetic structures, FRESNEL, lcsh:R, Science & Technology - Other Topics, lcsh:Medicine, lcsh:Q, DIFFRACTION PATTERNS, lcsh:Science, Article
Abstract

Diffractive zone plates have a wide range of applications from focusing x-ray to extreme UV radiation. The Gabor zone plate, which suppresses the higher-order foci to a pair of conjugate foci, is an attractive alternative to the conventional Fresnel zone plate. In this work, we developed a novel type of Beynon Gabor zone plate based on perfectly absorbing carbon nanotube forest. Lensing performances of 0, 8 and 20 sector Gabor zone plates were experimentally analyzed. Numerical investigations of Beynon Gabor zone plate configurations were in agreement with the experimental results. A high-contrast focal spot having 487 times higher intensity than the average background was obtained.

Published
2017

99. Prospects for Additive Manufacturing in Contact Lens Devices

Author

Alam, Fahad, primary, Elsherif, Mohamed, additional, AlQattan, Bader, additional, Ali, Murad, additional, Ahmed, Israr Muhammad Gulzar, additional, Salih, Ahmed, additional, Antonysamy, Dennyson Savariraj, additional, Yetisen, Ali K., additional, Park, Seongjun, additional, and Butt, Haider, additional

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results