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Articles 1291 - 1320 of 1706
Full-Text Articles in Engineering
Assessment And Analysis Of Emotional Intelligence In Engineering Students, Xiaodan Zhou
Assessment And Analysis Of Emotional Intelligence In Engineering Students, Xiaodan Zhou
All Theses
ABSTRACT
Current research on the importance and relevance of the relationship between emotional intelligence and work outcomes has continuously gained momentum since the publication of Daniel Goleman's best seller Emotional Intelligence: Why It Can Matter More Than IQ (Goleman, 1995). Professional expertise is no longer the only standard by which to evaluate graduates. 'Soft skills', like emotional intelligence are viewed as effective ways, to distinguish potential high-performance workers and those who will be 'no more than' a worker. This paper made an attempt to correlate emotional intelligence with academic performance of civil engineering students. The emotional capability of the students …
Determining The Global Maximum Biofuel Production Potential Without Conflicting With Food And Feed Consumption, Watcharapol Pumkaew
Determining The Global Maximum Biofuel Production Potential Without Conflicting With Food And Feed Consumption, Watcharapol Pumkaew
All Theses
This study tries to resolve the competition between food and biofuel by balancing the allocation between food and feed areas and biofuel areas for the entire world. The maximum energy production is calculated by determining the theoretical amount of energy that can be grown, once food and feed consumption is taken into account, based on the assumption that unprotected grass and woody lands and forest lands can be converted into cultivated lands. The total optimum land area for biofuel energy, 4,926.49 Mha, consists of corn, rapeseed, sugar beet, sugar cane, and grasses. When considering energy conversion efficiency, the maximum energy …
Agenda: Shale Plays In The Intermountain West: Legal And Policy Issues, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Shale Plays In The Intermountain West: Legal And Policy Issues, University Of Colorado Boulder. Natural Resources Law Center
Shale Plays in the Intermountain West: Legal and Policy Issues (November 12)
This one-day symposium to be held at the Grand Hyatt hotel in Denver will address the technology, economics, environmental impacts, and regulatory issues associated with shale gas development in the Rocky Mountain region. The purpose of this event is to facilitate productive dialogue among a wide range of stakeholders and interested parties to guide policy decisions.
Lateral Torsional Instability Of Single Channels Restrained By Angle Cleats, G. M. Bukasa, M. Dundu Masce
Lateral Torsional Instability Of Single Channels Restrained By Angle Cleats, G. M. Bukasa, M. Dundu Masce
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
A series of experiments on the lateral tors ional instability of single channels is presented. The channels are restrained by a purlin – angle cleat connection and subjected to a two point loading system in order to simulate a distributed load. Failure of the channels occurred by local buckling of the compression zone of the flange and web and lateral torsional buckling of the channels between points of lateral support. Tests have shown the purlin–angle cleat connection to be capable of restraining the frames from failing due to lateral-torsional buckling. This eliminates the idea of having fly-bracings, which is normally …
Angle Cleat Base Connections, M. Dundu, S. Maphosa
Angle Cleat Base Connections, M. Dundu, S. Maphosa
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
Tests, performed on base connections fabricated from cold-formed channels and hot-rolled angle cleats, are presented in this paper. This research is part of an on- going research to develop portal frames made out of cold-formed steel. The base connections are subjected to an axial load and moment. Hot-rolled angle cleats are used to prevent premature failing of the base connections. Several loading configurations are considered and these are dependent on the eccentricity of the load. In all the tests the cold-formed channels failed by local buckling. A significant amount of bearing distortion was observed in the heavily loaded flange. The …
20th International Specialty Conference: Recent Research And Developments In Cold-Formed Steel Structures, Wei-Wen Yu Center For Cold-Formed Steel Structures
20th International Specialty Conference: Recent Research And Developments In Cold-Formed Steel Structures, Wei-Wen Yu Center For Cold-Formed Steel Structures
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
A Realistic Technology And Engineering Assessment Of Algae Biofuel Production, T. J. Lundquist, I. C. Woertz, N. W. T. Quinn, J. R. Benemann
A Realistic Technology And Engineering Assessment Of Algae Biofuel Production, T. J. Lundquist, I. C. Woertz, N. W. T. Quinn, J. R. Benemann
Civil and Environmental Engineering
This report assesses the economics of microalgae biofuels production through an analysis of five production scenarios. These scenarios, or cases, are based on technologies that currently exist or are expected to become available in the near-term, including raceway ponds for microalgae cultivation, bioflocculation for algae harvesting, and hexane for extraction of algae oil. Process flow diagrams, facility site layouts, and estimates for the capital and operations costs of each case were developed de novo. This report also reviews current and developing microalgae biofuel technologies for both oil and biogas production, provides an initial assessment of the US and California …
Progressive Failure Simulation Of Security Cable Barriers, Christopher Y. Tuan, Ratul D. Sarmah, Alexander Y. Tuan, Ching-Sheng Kao, Q. S. Li
Progressive Failure Simulation Of Security Cable Barriers, Christopher Y. Tuan, Ratul D. Sarmah, Alexander Y. Tuan, Ching-Sheng Kao, Q. S. Li
Civil Engineering Faculty Publications
Perimeter security cable barriers are widely used by various agencies all over the world to defeat threat vehicle penetration. New barrier designs require crash test validation prior to implementation. Full-scale vehicular crash tests are costly, whereas designs via finite element simulations are time consuming and require specialized skills. Based on full-scale crash tests, an innovative and simple algorithm has been developed to model the progressive failure of security cable barriers. A multi-body approach based on the first principles of physics was developed to substantially reduce computer runtime. The solution algorithm uses a large number of small time steps. Nonlinear vehicle …
Development Of Advanced Finite Element Material Models For Cable Barrier Wire Rope, John D. Reid, Karla A. Lechtenberg, Cody S. Stolle
Development Of Advanced Finite Element Material Models For Cable Barrier Wire Rope, John D. Reid, Karla A. Lechtenberg, Cody S. Stolle
Nebraska Department of Transportation: Research Reports
An improved LS-DYNA model of ¾-in. (19-mm) diameter 3x7 wire rope commonly used in roadside cable guardrail installations has been developed. A Belytschko-Schwer beam element was selected along with material *MAT_166. Numerical noise was reduced using part stiffness damping with a coefficient of 2%, and frequency range damping with a coefficient of 12%. The optimum element length based on timestep, accuracy, and computational cost was determined to be between 0.4 and 0.8 in. (10-20 mm). Dynamic component tests were conducted on wire rope to determine material properties. These tests were simulated and the results compared to the physical tests. The …
Numerical Solutions Of Coastal Morphodynamic Evolution For Complex Topography, Chiang Yun-Chih, Hsiao Sung-Shan, Lin Ming-Chung
Numerical Solutions Of Coastal Morphodynamic Evolution For Complex Topography, Chiang Yun-Chih, Hsiao Sung-Shan, Lin Ming-Chung
Journal of Marine Science and Technology–Taiwan
Numerical modeling of coastal morphodynamic evolution is a powerful tool for the planning and design of coastal engineering. The coastal morphological modeling system is based on the sediment conservation law, which couples modules for waves, wave-driven currents, and sediment transport rates. The numerical scheme for the sediment conservation law and nonlinear coupling between these modules can lead to dispersions, diffusions, spurious oscillations and stability problems that are still not well developed. In this paper, the bedslope updating techniques, oscillation removal schemes, and 2-step, 3-time-level temporal discretization are employed to avoid oscillations and improve the stability of the coastal morphological model …
Natural Fibers And Fiberglass: A Technical And Economic Comparison, Justin Andrew Zsiros
Natural Fibers And Fiberglass: A Technical And Economic Comparison, Justin Andrew Zsiros
Theses and Dissertations
Natural fibers have received attention in recent years because of their minimal environmental impact, reasonably good properties, and low cost. There is a wide variety of natural fibers suitable for composite applications, the most common of which is flax. Flax has advantages in tensile strength, light weight, and low cost over other natural fibers. As with other natural and synthetic fibers, flax is used to reinforce both thermoset and thermoplastic matrices. When flax is used in thermoplastic matrices, polypropylene and polyethylene are the main resins used. Although at first glance flax may seem to be a cheaper alternative to fiberglass, …
Past Proceedings: Third International Conference On Case Histories In Geotechnical Engineering (1993), Multiple Authors
Past Proceedings: Third International Conference On Case Histories In Geotechnical Engineering (1993), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering (2008), Multiple Authors
Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering (2008), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Fifth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (2010), Multiple Authors
Past Proceedings: Fifth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (2010), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
General Report — Session 4, Ronaldo Luna, Panos Dakoulas, Wei Zheng, K. Önder Çetin, Mary Perlea, Gordon Tung-Chin Kung, Usama El Shamy, Simone Barani
General Report — Session 4, Ronaldo Luna, Panos Dakoulas, Wei Zheng, K. Önder Çetin, Mary Perlea, Gordon Tung-Chin Kung, Usama El Shamy, Simone Barani
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Preface, Shamsher Prakash
Preface, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Table Of Contents, Multiple Authors
Table Of Contents, Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
The Importance Of Creating Value In Seismic Design, Barnali Ghosh, Zygmunt Lubkowski, Jack Pappin
The Importance Of Creating Value In Seismic Design, Barnali Ghosh, Zygmunt Lubkowski, Jack Pappin
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Major earthquakes have resulted in devastating consequences in terms of human and economic loss. In almost all the earthquakes we observe the failure of structures, sometimes due to poor construction but also due to designers not identifying the specific geo-hazards (iIntensity of ground motion, faults, liquefaction, slopes etc) which affect these structures. In many cases these damages could have been avoided if the original design had correctly identified the geohazards at the site and incorporated the philosophy of performance based design. In this paper several examples will be presented where the different stages of risk assessment will be identified and …
State Of The Art And Practice (Soap) Speakers, Multiple Authors
State Of The Art And Practice (Soap) Speakers, Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Effect Of Canyon Geometry And Ground Conditions On The Seismic Performance Of Tendaho Earthfill Dam In Ethiopia., Tensay G. Berhe, Wu Wei
Effect Of Canyon Geometry And Ground Conditions On The Seismic Performance Of Tendaho Earthfill Dam In Ethiopia., Tensay G. Berhe, Wu Wei
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The seismic performance of earth dams is usually studied by two dimensional (2D) space. However, considerable judgment is required to estimate the overall three dimensional dynamic response of dams in a narrow canyon from plane strain analyses of individual sections of the dam. This is so because the plane strain analysis normally ignores the arching effect of the valley which is particularly relevant for dams in narrow valleys. Because of the arching action, the effect of the canyon geometry on the dynamic response of earth dams will be a stiffening of the system. The effect of the canyon geometry is …
Modeling The Influence Of Soil Structure Interaction On The Seismic Response Of A 5 Mw Wind Turbine, Ian Prowell, Ahmed Elgamal, Jinchi Lu
Modeling The Influence Of Soil Structure Interaction On The Seismic Response Of A 5 Mw Wind Turbine, Ian Prowell, Ahmed Elgamal, Jinchi Lu
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In order to capture more energy, wind turbines are rapidly growing in height and rotor size. This growth increases the likelihood that soil structure interaction effects may influence the structural dynamic response. Current 3 MW turbines tower over the landscape with an 80 meter hub height and a 90 meter rotor diameter. This paper models a full soil structure system for the National Renewable Energy Laboratory onshore 5 MW reference wind turbine with a hub height of 90 meter and a 126 meter rotor diameter. A detailed finite element model of the turbine is created, including a full three dimensional …
Preparation The Site Specific Spectrum For Civil Regions Of Zagross Mountains, Kaveh Andisheh, Seydeh Sara Hossini, Mortaza Taghizadeh
Preparation The Site Specific Spectrum For Civil Regions Of Zagross Mountains, Kaveh Andisheh, Seydeh Sara Hossini, Mortaza Taghizadeh
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this paper the site specific spectra for a region of the Zagros Mountains containing 5 cities in Kurdistan province of Iran is prepared. For this purpose, all the occurred earthquakes, containing both historical and instrumental events, in each 5 city have been gathered then main earthquakes was prepared by elimination the aftershocks, foreshocks, and the incorrect reported events from the data and main earthquakes were taken into consideration to calculate the seismic parameters by Kijko [2000] method considering uncertainty in magnitude and incomplete earthquake catalogue. All seismic sources of the region are modeled and recurrence relationship is established. After …
Principles And Practices Of Seismic Microzonation: Case Studies In India, T. G. Sitharam, P. Anbazhagan, K. S. Vipin
Principles And Practices Of Seismic Microzonation: Case Studies In India, T. G. Sitharam, P. Anbazhagan, K. S. Vipin
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper presents an overview of the principles and practices of seismic microzonation with some case studies in India. India has experienced major damages and loss of life due to earthquakes. Macrozonation map in Indian seismic code IS-1893 is frequently revised soon after a major earthquake in the country. New revision which was published in 2002 after Bhuj earthquake in 2001 contains four macro zones. These zones are based on geology and limited seismology input without considering geotechnical aspects such as site effects and liquefaction. In order to understand the earthquake vulnerability of major urban centers and prepare new zonation …
The Non-Regularity Of Earthquake Recurrence In California: Lessons From Long Paleoseismic Records From The San Andreas And San Jacinto Faults In Southern California, And The North Anatolian Fault In Turkey, Thomas Rockwell
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A long paleoseismic record at Hog Lake on the central San Jacinto fault in southern California documents evidence for 18 surface ruptures in the past 3.8-4 ka. This yields a long-term recurrence interval of about 210 years, consistent with its slip rate of ~15 mm/yr and field observations of 3-3.5 m of displacement per event. However, during the past 3800 years, the fault has switched from a quasiperiodic mode of earthquake production, during which the recurrence interval is similar to the long-term average, to clustered behavior with the inter-event periods as short as a few decades (five surface ruptures occurred …
Seismic Stability Assessment The Raising Of The Geita Tailings Storage Facility, Tanzania, Michelle Theron, Fritz Wagener, Phillip Steenkamp
Seismic Stability Assessment The Raising Of The Geita Tailings Storage Facility, Tanzania, Michelle Theron, Fritz Wagener, Phillip Steenkamp
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The Geita gold mine, owned by AngloGold Ashanti, is located in the north west of Tanzania on the African Rift Belt in a seismically active. It is also located in an environmentally sensitive area as it is directly upslope of Lake Victoria. The Tailings Storage Facility was constructed as a side valley dam with its maximum design embankment elevation 1216m (i.e. 35m above ground level) and store capacity approximately 60 million tons of tailings. The feasibility of increasing this wall ultimately to 1246m (i.e. 65m above ground level) thereby increasing its capacity by 88.5 million tons, is the topic of …
Ground Improvement Under Dynamic Loading, M. Ittershagen
Ground Improvement Under Dynamic Loading, M. Ittershagen
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
To analyze the dynamic soil-structure interaction of railway lines on soft soil experimental and numerical investigations have been carried out. The mean intention was to get information about the influence of different soil improvement layouts and further on to establish a design tool for railway lines on soft soil based on the additional results of a numerically supported parametric study. The principle part of the paper is the presentation of the experimental and numerical investigations.
Water Allocation Challenges In Rural River Basins: A Case Study From The Walawe River Basin, Sri Lanka, D. K. Neelanga Weragala
Water Allocation Challenges In Rural River Basins: A Case Study From The Walawe River Basin, Sri Lanka, D. K. Neelanga Weragala
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This dissertation evaluates the water allocation challenges in the rural river basins of the developing world, where demands are growing and the supply is limited. While many of these basins have yet to reach the state of closure, their water users are already experiencing water shortages. Agricultural crop production in rural river basins of the developing world plays a major role in ensuring food security. However, irrigation as the major water consumer in these basins has low water use efficiency. As water scarcity grows, the need to maximize economic gains by reallocating water to more efficient uses becomes important. …