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Your search keyword '"Hussain, Syed Tajammul"' showing total 143 results
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143 results on '"Hussain, Syed Tajammul"'

10. Cure Characterization of Cycom 977-2A Carbon/Epoxy Composites for Quickstep Processing

Author

Khan, Laraib A., Kausary, Ayesha, Hussain, Syed Tajammul, Iqbal, Zafar, J. Day, Richard, Syed, Ahmed Shuja, and Khan, Zaffar M.

Subjects
Curing -- Methods, Epoxy resins -- Usage, Polymeric composites -- Production processes, Carbon -- Usage, Engineering and manufacturing industries, Science and technology
Abstract

In this effort, Quickstep, a relatively a new technique, have been employed for manufacturing of composite materials. The cure schedule provided by a prepreg manufacturer is usually designed for autoclave [...]

Published
2014

20. Surface Defects: Possible Source of Room Temperature Ferromagnetism in Co-Doped ZnO Nanorods

Author

Tahir, Nadeem, Karim, Altaf, Persson, Kristin A., Hussain, Syed Tajammul, Cruz, Alejandro G., Usman, Muhammad, Naeem, Muhammad, Qiao, Ruimin, Yang, Wanli, Chuang, Yi-De, and Hussain, Zahid

Abstract

Contradicting results about the origin of room temperature ferromagnetism (RTFM) from measurements on different forms of transition metal (TM)-doped ZnO nanostructured materials lead to strong debates on whether RTFM could be an intrinsic property to TM-doped ZnO or not. Through careful synthesis and extensive characterizations, we have excluded the extrinsic contaminations as the cause of RTFM. Our experimental study confirms that defects such as oxygen vacancies lie on surface of nanorods and are likely a source of RTFM. X-ray absorption and emission spectroscopy (XAS and XES) suggest that the doped Co ions, primarily in the divalent state, replace the Zn ions inside the tetrahedral without introducing Co clustering or Zn-related defects. Band gap narrowing upon Co doping is observed in both optical reflectance and O K-edge XAS/XES and is in agreement with the presence of oxygen vacancies and strong sp–d hybridization. Furthermore, such a trend can be nicely reproduced in GGA+U band structure calculations. Calculations also suggest that these oxygen vacancies are likely to congregate at low-energy (101) and (100) surfaces, instead of inside the bulk. Our findings highlight the importance of using the nanocrystalline surfaces to enhance the impurity concentrations and stabilize the ferromagnetism without post-sample annealing in an oxygen-deficient environment.

Published
2024
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23. A study of unlearning IT Instruments in health organization

Author

Hussain, Syed Tajammul

Subjects
Organizational Memory, Cosmic, Learning, Journals, Unlearning, Change, Episodic Change, Continuous change
Abstract

Nothing has been that consistent as the change is for the knowledge revolution to nourish and cultivate. Different forms of changes are occurring in organizations with the aim to improve the output performances. Health organizations have been more attached to the changes and the consequences that are brought with such changes. Such consequences are primarily connected with concepts of unlearning and learning. Any form of the change if initiated in organization asks for new routines learning, tasks conductions and the organizational cultural revolution. These new routines have been occurring at individual and organizational levels. The unlearning at any level in the organizational culture can be performed through investigating a primary connection between the organizational and individual routines. At the individual level unlearning brings a number of psychological, cognitive, social and moral hurdles. These hurdles at individual level basically help the organizational unlearning to occur. All of the routines occurring at individual level encompass the necessary information that goes from lower levels to upward, strengthening and holding the organizational memory firm. This research was about to find how the health organizations unlearn the older practices and learn the new practices in IT change. This research had two streams i) finding whether there had been any connection between the organizational and individual unlearning in the cases of IT change, ii) For unlearning what kind of hurdles had been there at the individual level. Kalmar hospital pediatric department had been chosen for the empirical investigations. The research streams were about how and what parts which helped the researcher to go for the qualitative data gathering techniques. The Results showed there had been a very thin connectivity between the organizational and individual unlearning. The results revealed and unfolded that many of the new learning are occurring simultaneously with discarding the older ways of practices. The impression of absorbing the change with respect to the unlearning had been varied from person to person. There had been a numbers of individual hurdles observed at individual level of unlearning. Apart from them, many individual routines (performative tasks) had the primary connectivity with the organizational routines (Ostensive routines) and shaping and reshaping of the organizational memory. It is important to understand the unlearning notions with the type of change. In this research each of the interviewee had shared his thoughts of how the things could have been done differently by revealing the consequences with new learning. Literature suggests that for a profound and successful implementation of change more formal and informal trainings, clear strategy for shuffling the older individuals in the camp, more social and cognitive meetings and fast and quick actions in the cases of technical difficulties are to be taken. Thesis

Published
2009

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