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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
301

Perception of Ohio School Food Service Directors Towards Salad Bar and Its Implications: An Exploratory analysis

Gebreab, Habteab Eyassu 17 December 2013 (has links)
No description available.
302

Effects of Unstable Versus Stable Free Weights on Surface EMG of Shoulder Musculature in Males

Azar, Jared A. January 2016 (has links)
No description available.
303

Experimental Techniques and Mechanical Behavior of T800/F3900 at Various Strain Rates

Yang, Peiyu January 2016 (has links)
No description available.
304

Design and implementation of a micro-computer based bar coding data collection system for improving warehouse information handling and cost control

Cheok, Tuan Sun January 1990 (has links)
No description available.
305

Physics Based Hierarchical Decomposition of Processes for Design of Complex Engineered Systems

Agarwal, Kuldeep 16 December 2011 (has links)
No description available.
306

Tunable Dynamic Support for Resonance Avoidance in Bar Feeders

Pierson, Harry A. 16 August 2012 (has links)
No description available.
307

Role of Confinement in Coseismic Pulverization of Sediments: Testing the Rock Record of Rupture Directivity

Kindred Weigandt, Caje A. 22 July 2022 (has links)
No description available.
308

Analysis of turbulent flow structure with its fluvial processes around mid-channel bar

Khan, M.A., Sharma, N., Pu, Jaan H., Alam, S., Khan, W.A. 23 March 2022 (has links)
Yes / Researchers have recognized that the successive growth of mid-channel bar deposits can be entertained as the raison d’être for the initiation of the braiding process, which is closely interlinked with the growth, decay, and vertical distribution of fluvial turbulent kinetic energy (TKE). Thus, focused analysis on the underlying mechanics of turbulent flow structures in the proximity of a bar deposit occurring in the middle of the channel can afford crucial scientific clues for insight into the initiating fluvial processes that give rise to braiding. In the study reported herein, a physical model of a mid-channel bar is constructed in an experimental flume to analyze the turbulence parameters in a region close to the bar. Notably, the flow velocity plays an important role in understanding the flow behavior in the scour-hole location in the upstream flow divergence zone as well as near the downstream zone of flow convergence in a mid-channel bar. Therefore, the fluctuating components of turbulent flow velocity are herein discussed and analyzed for the regions located close to the bar. In the present study, the impact of the mid-channel bar, as well as its growth in turbulent flow, on higher-order velocity fluctuation moments are investigated. For near-bed locations, the results show the dominance of ejection events in upstream zones and the dominance of sweep events at locations downstream of the mid-channel bar. In scour-hole sections, the negative value of the stream-wise flux of turbulent kinetic energy and the positive value of the vertical flux of turbulent kinetic energy indicate energy transport in downward and forward directions, respectively. The downward and forward energy transport processes lead to scouring at these locations. The maximum turbulent production rate occurs in the wake region of the bar. The high rate of turbulence production has occurred in that region, which can be ascribed to the process of shedding turbulent vortices. The results show that the impact of the presence of the bar is mainly restricted to the lower layers of flow. The turbulent dissipation rate monotonically decreases with an increase in the vertical distance from the bed. The turbulent production rate first increases and then decreases with successive increases in the vertical distance from the bed. The paper concludes with suggestions for the future potential use of the present research for the practical purpose of examining braid bar occurrences in alluvial rivers to develop an appropriate response through training measures
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309

Mid-channel braid bar induced turbulent bursts: analysis using octant events approach

Khan, M.A., Sharma, N., Pu, Jaan H., Alfaisal, F.M., Alam, S., Garg, R., Qamar, M.O. 28 March 2022 (has links)
Yes / In a laboratory, a model of a mid-channel bar is built to study the turbulent flow structures in its vicinity. The present study on the turbulent flow structure around a mid-channel bar is based on unravelling the fluvial fluxes triggered by the bar’s 3D turbulent burst phenomenon. To this end, the three-dimensional velocity components are measured with the help of acoustic doppler velocimetry (ADV). The results indicate that the transverse component of turbulent kinetic energy cannot be neglected when analyzing turbulent burst processes, since the dominant flow is three-dimensional around the mid-channel bar. Due to the three-dimensionality of flow, the octant events approach is used for analyzing the flow in the vicinity of the mid-channel bar. The aim is to develop functional relationships between the stable movements that are modelled in the present study. To find the best Markov chain order to present experimental datasets, the zero-, first-, and second-order Markov chains are analyzed using the Akaike information criterion (AIC) and the Bayesian information criterion (BIC). The parameter transition ratio has evolved in this research to reflect the linkage of streambed elevation changes with stable transitional movements. For a better understanding of the temporal behaviors of stable transitional movements, the residence time vs. frequency graphs are also plotted for scouring as well as for depositional regions. The study outcome herein underlines the usefulness of the octant events approach for characterizing turbulent bursts around mid-channel bar formation, which is a precursor to the initiation of braiding configuration. / This research and APC was funded by King Saud University, Riyadh, Saudi Arabia through Researchers Supporting Project number (RSP-2021/297).
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310

Eccentric compression behavior of Steel-FRP composite bars RC columns under coupling action of chloride corrosion and load

Ge, W., Zhang, S., Zhang, Z., Guan, Z., Ashour, Ashraf, Sun, C., Lu, W., Cao, D. 02 November 2023 (has links)
No / In order to investigate the eccentric compression behaviors of steel-FRP composite bar (SFCB) reinforced concrete (RC) columns subjected to chloride corrosion, the mechanical experiments of chloride corroded SFCBs and SFCBs RC eccentric compression columns were conducted. The effect of reinforcement type and ratio, eccentricity, slenderness, stress level and corrosion duration on bearing capacity, deformation, crack and failure pattern were investigated. The results showed that the strength retention ratio of reinforcement decreases with the increase of corrosion duration, the ultimate strengths of steel rebar, SFCB and FRP rebar decreased by 12.2%, 9.9% and 3.6%, respectively, when compared with those of uncorroded counterparts. With the increase of steel content of reinforcement, the load bearing capacity of eccentric compression RC column increases while the deformation decreases gradually. The load bearing capacity of corroded steel, SFCB and FRP RC columns maximally decreased by 16.6%, 12.4% and 7.2%, respectively, when compared with those of uncorroded counterparts. Based on the simplified materials constitutive relations and reasonable basic assumptions, formulae for discriminate failure mode, moment magnification factor and bearing capacity were developed. The predicted failure pattern, moment magnification factor and bearing capacity are in good agreement with the test results, confirming the validity of the proposed formulae, the results can be used as a reference for engineering application. / High-End Foreign Experts Project of Ministry of Science and Technology, China (G2022014054L), the Natural Science Foundation of Jiangsu Province, China (BK20201436), the Science and Technology Project of Jiangsu Construction System (2018ZD047, 2021ZD06), the Science and Technology Project of Gansu Construction System (JK2021-19), the Opening Foundation of Jiangsu Province Engineering Research Center of PrefabricatedBuilding and Intelligent Construction (2021), the Science and Technology Cooperation Fund Project of Yangzhou City and Yangzhou University (YZ2022194, YZU212105), the Science and Technology Project of Yangzhou Construction System (2022ZD03, 202204), the Nantong Jianghai (226) talents project, the Blue Project Youth Academic Leader of Colleges and Universities in Jiangsu Province (2020).
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