subject:(Dynamic stabilization)

University of Texas – Austin

1. -5905-0721. The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals.

Degree: MSin Engineering, Mechanical Engineering, 2018, University of Texas – Austin

URL: http://hdl.handle.net/2152/72456

► Stroke survivors often have diminished balance control and are highly prone to falling, which can lead to long-term injuries, disabilities and reduced quality of life.… (more)

▼ Stroke survivors often have diminished balance control and are highly prone to falling, which can lead to long-term injuries, disabilities and reduced quality of life. Maintaining balance during gait requires active control, but this control may be impaired post-stroke. Individuals post-stroke often walk with wider steps when compared to healthy, age-matched controls, which can negatively affect balance control. Previous studies have shown when lateral stabilization is applied to the pelvis, healthy young and older adults walk with reduced step width, step width variability and energetic cost, suggesting that lateral stabilization reduces the need for active frontal plane balance control. The purpose of this study was to determine if lateral stabilization is effective at improving gait performance and dynamic balance in healthy (Controls) and post-stoke (Responders) individuals (i.e., those who responded to the stabilization by reducing their step width). Controls and Responders significantly reduced their step width and mediolateral pelvis sway while stabilized, but these changes did not lead to improved gait performance (e.g., foot placement and propulsion symmetry) or balance control. There were no significant and clinically relevant changes in either group’s gait performance, and in some cases the Responders’ gait performance decreased when stabilized. Both groups exhibited decreased balance control that resulted in an increased range of frontal plane whole body angular momentum (H). This increase was the result of increased relative velocity between the pelvis and the head, arms and trunk (HAT) segment. The increase in relative motion may indicate that stabilizing the pelvis does not improve balance control unless care is taken to make sure that the relative motion between the pelvis and HAT segment does not increase as a result. The results of this study suggest that reduction in absolute motion of the pelvis, as opposed to relative motion between the pelvis and upper body, may lead to decreased balance control by increasing the range of frontal plane H. This finding has important implications for locomotor therapies that seek to improve balance control by stabilizing the pelvis. Advisors/Committee Members: Neptune, Richard R. (advisor).

Subjects/Keywords: Post-stroke gait; Lateral stabilization; Dynamic balance control; Post-stroke rehabilitation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

-5905-0721. (2018). The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/72456

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-5905-0721. “The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals.” 2018. Masters Thesis, University of Texas – Austin. Accessed April 10, 2021. http://hdl.handle.net/2152/72456.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-5905-0721. “The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals.” 2018. Web. 10 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-5905-0721. The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals. [Internet] [Masters thesis]. University of Texas – Austin; 2018. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2152/72456.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-5905-0721. The influence of lateral stabilization on walking performance and balance control in healthy and post-stroke individuals. [Masters Thesis]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/72456

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Kaunas University of Medicine

2. Ražanauskaitė, Rūta. S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą.

Degree: Master, Nursing, 2009, Kaunas University of Medicine

URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20090617_163318-30372 ;

►

Tyrimo tikslas: įvertinti S-E-T koncepcija pagrįstos kineziterapijos efektyvumą gydant pacientus, turinčius juosmens tarpslankstelinio disko išvaržą. Tyrimo uždaviniai: 1.) įvertinti tiriamosios ir kontrolinės grupės pacientų griaučių-raumenų… (more)

▼

Tyrimo tikslas: įvertinti S-E-T koncepcija pagrįstos kineziterapijos efektyvumą gydant pacientus, turinčius juosmens tarpslankstelinio disko išvaržą. Tyrimo uždaviniai: 1.) įvertinti tiriamosios ir kontrolinės grupės pacientų griaučių-raumenų sistemos funkcinę būklę prieš ir po gydymo; 2.) atlikti tiriamosios ir kontrolinės grupės pacientų kompleksinę skausmo analizę prieš ir po gydymo; 3.) nustatyti tiriamosios ir kontrolinės grupės pacientų negalios lygį prieš ir po gydymo; 4.) apibendrinti ir palyginti gautus tyrimo duomenis įvertinant S-E-T koncepcija pagrįstos kineziterapijos efektyvumą. Tyrimo metodai: Tyrime dalyvavo 30 pacientų, kuriems buvo diagnozuota juosmens tarpslankstelinio disko išvarža. Visi tiriamieji buvo suskirstyti į tiriamąją (20 pacientų) ir kontrolę (10 pacientų) grupes. Tiriamosios grupės pacientai, atsižvelgiant į skausmo lokalizaciją, buvo suskirstyti į du pogrupius, kurių kiekviename buvo po 10 pacientų. Visiems pacientams buvo atlikta po 14 individualių kineziterapijos procedūrų. Gydymo pradžioje ir po gydymo visiems pacientams buvo vertinama funkcinė būklė, atliekama kompleksinė skausmo analizė ir nustatomas negalios lygis. Išvados: 1.) A. Po kineziterapijos pagal S-E-T koncepciją stebėtas nervo jautrumo sumažėjimas, judesių amplitudės, atlikties judesių, siekimo su apkrova ir pilvo raumenų ištvermės pagerėjimas (p<0,05). B. Po įprastinės kineziterapijos pagerėjo tik abipusio šoninio lenkimo judesių amplitudė (p<0,05). 2.) A. Po kienziterpaijos... [toliau žr. visą tekstą]

The purpose of the work: to evaluate efficiency of physiotherapy, based on S-E-T concept, for patients with lumbar intervertebral disc herniation. Goals: 1.) to evaluate the functional state of patients of test and control groups before and after treatment; 2.) to accomplish the comprehensive analysis of the pain of patients of test and control groups before and after treatment; 3.) to determine the disability level of patients of test and control groups before and after treatment; 4.) to summarize and compare the received data of study in justice to efficiency of the physiotherapy based on S-E-T concept. Methods: Study included 30 patients with lumbar intevertebral disc herniation. All the test were divided into intervention group (20 patients) and control group (10 patients). The patients of intervention group depending on location of pain were divided into two subgroups. It was performed 14 procedures of individual physiotherapy for all patients. At the beginning and the end of treatment the functional condition was evaluated, the comprehensive analysis of the pain was accomplished and the level of disability was determined for all patients. Conclusions: 1.) A. After physiotherapy according to S-E-T concept noticed the reduction of nerve sensitivity, improvement of range of motion, movements of performance, reaching towards with load and abdominal muscle static strength (p<0,05). B. After the usual physiotherapy improved only bilateral bending range of motion (p<0,05). 2.)... [to full text]

Advisors/Committee Members: Zaveckas, Vidmantas (Master’s thesis supervisor), Šakalienė, Rasa (Master’s thesis reviewer), Kimtys, Algimantas (Master’s degree committee member), Rimdeikienė, Inesa (Master’s degree committee member), Šakalienė, Rasa (Master’s degree committee member), Milinavičienė, Eglė (Master’s degree committee member), Vainoras, Alfonsas (Master’s degree committee member), Kriščiūnas, Aleksandras (Master’s degree committee chair).

Subjects/Keywords: S-E-T koncepcija; Dinaminė stabilizacija; Trakcija; S-E-T concept; Dynamic stabilization; Traction

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ražanauskaitė, Rūta. (2009). S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą. (Masters Thesis). Kaunas University of Medicine. Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20090617_163318-30372 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

Ražanauskaitė, Rūta. “S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą.” 2009. Masters Thesis, Kaunas University of Medicine. Accessed April 10, 2021. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20090617_163318-30372 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

Ražanauskaitė, Rūta. “S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą.” 2009. Web. 10 Apr 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

Ražanauskaitė, Rūta. S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą. [Internet] [Masters thesis]. Kaunas University of Medicine; 2009. [cited 2021 Apr 10]. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20090617_163318-30372 ;.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

Ražanauskaitė, Rūta. S-E-T koncepcija pagrįstos kineziterapijos efektyvumas pacientams, turintiems juosmens tarpslankstelinio disko išvaržą. [Masters Thesis]. Kaunas University of Medicine; 2009. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2009~D_20090617_163318-30372 ;

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Brigham Young University

3. Harris, Jeffrey Ellis. The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System.

Degree: MS, 2012, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4363&context=etd

► The purpose of this research was to investigate the influence of applying an intrinsic decompressive pre-load to a particular dynamic stabilization device on the biomechanical… (more)

Subjects/Keywords: Jeffrey Harris; lumbar spine; finite element analysis; dynamic stabilization; disc degeneration; motion restoration; Mechanical Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Harris, J. E. (2012). The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4363&context=etd

Chicago Manual of Style (16^th Edition):

Harris, Jeffrey Ellis. “The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System.” 2012. Masters Thesis, Brigham Young University. Accessed April 10, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4363&context=etd.

MLA Handbook (7^th Edition):

Harris, Jeffrey Ellis. “The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System.” 2012. Web. 10 Apr 2021.

Vancouver:

Harris JE. The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System. [Internet] [Masters thesis]. Brigham Young University; 2012. [cited 2021 Apr 10]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4363&context=etd.

Council of Science Editors:

Harris JE. The Biomechanical Implications of an Intrinsic Decompressive Pre-Load on a Posterior Dynamic Stabilization System. [Masters Thesis]. Brigham Young University; 2012. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=4363&context=etd

University of Arizona

4. Seok, HyoJun. Aspects Of Multimode Quantum Optomechanics .

Degree: 2014, University of Arizona

URL: http://hdl.handle.net/10150/332877

► This dissertation aims to investigate systems in which several optical and mechanical degrees of freedom are coupled through optomechanical interactions. Multimode optomechanics creates the prospect… (more)

▼ This dissertation aims to investigate systems in which several optical and mechanical degrees of freedom are coupled through optomechanical interactions. Multimode optomechanics creates the prospect of integrated functional devices and it allows us to explore new types of optomechanical interactions which account for collective dynamics and optically mediated mechanical interactions. Owing to the development of fabrication techniques for micro- and nano-sized mechanical elements, macroscopic mechanical oscillators can be cooled to the deep quantum regime via optomechanical interaction. Based on the possibility to control the motion of mechanical oscillators at the quantum level, we design several schemes involving mechanical systems of macroscopic length and mass scales and we explore the nonlinear dynamics of mechanical oscillators. The first scheme includes a quantum cantilever coupled to a classical tuning fork via magnetic dipole-dipole interaction and also coupled to a single optical field mode via optomechanical interaction. We investigate the generation of nonclassical squeezed states in the quantum cantilever and their detection by transferring them to the optical field. The second scheme involves a quantum membrane coupled to two optical modes via optomechanical interaction. We explore dynamic stabilization of an unstable position of a quantum mechanical oscillator via modulation of the optical fields. We then develop a general formalism to fully describe cavity mediated mechanical interactions. We explore a rather general configuration in which multiple mechanical oscillators interact with a single cavity field mode. We specifically consider the situation in which the cavity dissipation is the dominant source of damping so that the cavity field follows the dynamics of the mechanical modes. In particular, we study two limiting regimes with specific applications: the weak-coupling regime and single-photon strong-coupling regime. In the weak-coupling regime, we build a protocol for quantum state transfer between mechanical modes. In the single-photon coupling regime, we investigate the nonlinear nature of the mechanical system which generates bistability and bifurcation in the classical analysis and we also explore how these features manifest themselves in interference, entanglement, and correlation in the quantum theory. Advisors/Committee Members: Meystre, Pierre (advisor), Meystre, Pierre (committeemember), Wright, Ewan M. (committeemember), Anderson, Brian P. (committeemember).

Subjects/Keywords: dynamic stabilization; mechanical squeezing; multimode optomechanics; optically mediated mechanical interactions; Optical Sciences; cavity optomechanics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Seok, H. (2014). Aspects Of Multimode Quantum Optomechanics . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/332877

Chicago Manual of Style (16^th Edition):

Seok, HyoJun. “Aspects Of Multimode Quantum Optomechanics .” 2014. Doctoral Dissertation, University of Arizona. Accessed April 10, 2021. http://hdl.handle.net/10150/332877.

MLA Handbook (7^th Edition):

Seok, HyoJun. “Aspects Of Multimode Quantum Optomechanics .” 2014. Web. 10 Apr 2021.

Vancouver:

Seok H. Aspects Of Multimode Quantum Optomechanics . [Internet] [Doctoral dissertation]. University of Arizona; 2014. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10150/332877.

Council of Science Editors:

Seok H. Aspects Of Multimode Quantum Optomechanics . [Doctoral Dissertation]. University of Arizona; 2014. Available from: http://hdl.handle.net/10150/332877

University of South Carolina

5. Arrua, Silvia. DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System.

Degree: PhD, Electrical Engineering, 2019, University of South Carolina

URL: https://scholarcommons.sc.edu/etd/5365

► Evolution of semiconductor devices is allowing to implement power electronics technology in a variety of applications, moving traditional AC systems to more efficient and… (more)

▼ Evolution of semiconductor devices is allowing to implement power electronics technology in a variety of applications, moving traditional AC systems to more efficient and reliable DC systems. Some examples are shipboard power distribution systems, DC microgrids, electric vehicles and more electric aircrafts. Even though these types of systems offer significant advantages that make them attractive in different areas, the interconnection of feedback-controlled power converters leads to emergent dynamic behavior that a system designer must take into account to ensure proper operation of the system. Additionally, system reconfiguration is very likely to happen in applications such as a shipboard power distribution, where the loads and sources may change depending on the current mission or in case of contingency. In these cases, system dynamics will change and the overall stability may be compromised. Several criteria can be found in the literature to evaluate system stability. More recently, it was shown that the DC bus impedance can be used for this purpose, overcoming some limitations that other criteria had. Additionally, system identification can be used to monitor the bus impedance. However, there is still a need for a method to evaluate the dynamic performance to guarantee that sudden changes in the system will not affect the DC distribution bus significantly. Active and passive stabilization methods can be implemented to allow for the plug-in capability of new converters to increase the size of the system without compromising the overall stability of the power distribution system. One approach is to implement Positive Feed-Forward control on a load side converter, which introduces a virtual damping impedance at the DC bus. A proper design approach for this damping impedance that will ensure a good stability margin is needed. To address these challenges, firstly a modelling approach that facilitates obtaining the transfer functions of a multi-converter system is presented. Second, a simplified model of the bus impedance will be developed that will allow to evaluate the system when it undergoes reconfiguration and to take fast corrective actions when they are needed. Third, a design procedure for the required damping impedance based on the bus impedance dominant poles will be proposed. And last, an adaptive and distributed stabilizing controller will be presented to account for changes in the load demand. Advisors/Committee Members: Enrico Santi.

Subjects/Keywords: Electrical and Computer Engineering; Engineering; DC bus stabilization; dynamic performance improvement; multi-converter system; semiconductor

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Arrua, S. (2019). DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System. (Doctoral Dissertation). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/5365

Chicago Manual of Style (16^th Edition):

Arrua, Silvia. “DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System.” 2019. Doctoral Dissertation, University of South Carolina. Accessed April 10, 2021. https://scholarcommons.sc.edu/etd/5365.

MLA Handbook (7^th Edition):

Arrua, Silvia. “DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System.” 2019. Web. 10 Apr 2021.

Vancouver:

Arrua S. DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System. [Internet] [Doctoral dissertation]. University of South Carolina; 2019. [cited 2021 Apr 10]. Available from: https://scholarcommons.sc.edu/etd/5365.

Council of Science Editors:

Arrua S. DC Bus Stabilization and Dynamic Performance Improvement of a Multi-Converter System. [Doctoral Dissertation]. University of South Carolina; 2019. Available from: https://scholarcommons.sc.edu/etd/5365

University of Toledo

6. VanMeter, Ashley D. Time to Stabilization: Number of Practice Trials and Measured Trials Needed.

Degree: MSin Exercise Science, Exercise Science, 2007, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1178291778

► Objective: To establish a standard protocol for the number of practice and test trials needed for testing TTS. Design and Setting: Separate trial (1-20) by… (more)

▼ Objective: To establish a standard protocol for the number of practice and test trials needed for testing TTS. Design and Setting: Separate trial (1-20) by side dominant,non-dominant) repeated measures ANOVA was performed for APTTS and MLTTS. A paired samples t-test was performed to determine the number of failed trials between the dominant and non-dominant sides. A Scheffe’s post-hoc test was applied. Significance was set at p<0.05. Subjects: Thirty-one healthy subjects participated in this study. Measurements: Subjects participated in one testing session. Twenty trials of a jumplanding task were performed on each leg. The jump-landing task consisted of a single leg landing from a double leg jump height equivalent to 50% of the subject’s maximum jump height. Subjects started 70cm away from the center of the forceplate (Bertec, Corp; Columbus, OH). Subjects jumped off of both feet, reached up and touched the indicated marker, and landed on the forceplate with one foot. The landing leg was randomized. Results: For MLTTS, no significant interaction between side and time existed (F19,570=.078, p =.667; power = 0.64). A significant main effect for trial existed (F19, 570= 2.901, p< .001; power = 0.99). There was no significant main effect for Side dominant (1.61± .03)non-dominant(1.63 ± .03)(F1, 30= 6.17, p = .438; power = 0.12). For APTTS, there was no significant interaction between Side and Time. (F19, 570= .973, p = .492; power = 0.73) There was no significant main effect for trial (F19, 570= 1.34, p = .153; power = 0.89) or side (dominate (1.18 ± .02) vs. non-dominate (1.19 ± .02)) (F1, 30= .081, p = .778; power = 0.06). For failed trials, there was no significant difference between the dominant (5.90±0.84 trials) and non-dominant (6.00±1.06 trials) (t=-0.97, p = .924). Conclusion: This study attempted to determine how many practice and test trials are needed to achieve consistency. It appears that either leg can be used during TTS calculations which will help clinicians trying to find a base comparison for the injury leg. However, the primary purpose of this study, which was to determine the number of trials needed to overcome a learning effect, was not realized fully. We can cautiously conclude that three practice trials would allow a healthy subject to become familiar with the task. However, this study brings up the question if there really is a learning effect that is quantifiable associated with TTS assessment in healthy subjects. Advisors/Committee Members: Gribble, Phillip (Advisor).

Subjects/Keywords: Time to Stabilization; Dynamic Postural Control

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

VanMeter, A. D. (2007). Time to Stabilization: Number of Practice Trials and Measured Trials Needed. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1178291778

Chicago Manual of Style (16^th Edition):

VanMeter, Ashley D. “Time to Stabilization: Number of Practice Trials and Measured Trials Needed.” 2007. Masters Thesis, University of Toledo. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1178291778.

MLA Handbook (7^th Edition):

VanMeter, Ashley D. “Time to Stabilization: Number of Practice Trials and Measured Trials Needed.” 2007. Web. 10 Apr 2021.

Vancouver:

VanMeter AD. Time to Stabilization: Number of Practice Trials and Measured Trials Needed. [Internet] [Masters thesis]. University of Toledo; 2007. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1178291778.

Council of Science Editors:

VanMeter AD. Time to Stabilization: Number of Practice Trials and Measured Trials Needed. [Masters Thesis]. University of Toledo; 2007. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1178291778

7. Al-Jhayyish, Anwer K. Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices.

Degree: MS, Civil Engineering (Engineering and Technology), 2014, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246

► Roadbeds are considered one of the most problematic components in pavement design and construction. Its engineering properties differ significantly in terms of soil composition, gradation,… (more)

Subjects/Keywords: Civil Engineering; Transportation; Soil Stabilization; Incorporate; Subgrade Stabilization; Pavement Design; Construction Practices; MEPDG; AASHTO 1993; Finite Element Model; Dynamic Cone Pentrometer; DCP; Falling Weight Deflectometer; FWD; Backcalculation; Subgrade Modulus

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Al-Jhayyish, A. K. (2014). Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246

Chicago Manual of Style (16^th Edition):

Al-Jhayyish, Anwer K. “Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices.” 2014. Masters Thesis, Ohio University. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246.

MLA Handbook (7^th Edition):

Al-Jhayyish, Anwer K. “Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices.” 2014. Web. 10 Apr 2021.

Vancouver:

Al-Jhayyish AK. Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices. [Internet] [Masters thesis]. Ohio University; 2014. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246.

Council of Science Editors:

Al-Jhayyish AK. Incorporating Chemical Stabilization of the Subgrade in Pavement Design andConstruction Practices. [Masters Thesis]. Ohio University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1405480246

University of Toledo

8. Ambati, Divya V. Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems.

Degree: MS, Bioengineering, 2010, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290226430

► Dynamic stabilization devices such as the Stabilimax (Applied Spine Technologies Inc.) are being considered as a viable alternative to fusion for patients suffering from… (more)

▼ Dynamic stabilization devices such as the Stabilimax (Applied Spine Technologies Inc.) are being considered as a viable alternative to fusion for patients suffering from low back pain. As opposed to fusion, the Stabilimax provides controlled range of motion in patients undergoing decompression procedures for central or lateral lumbar spinal stenosis at one or two adjacent levels. This pedicle screw based system features an internal dual spring mechanism which combined with a ball and socket joint provides stability by allowing controlled motion to the treated level(s) of the lumbar region. In the recent times, efforts are being made to have the motion preserving devices stabilize the segments, like the rigid instrumentation, if needed. The Stabilimax could be made to achieve this goal by limiting the range of motion of the treated segment with different spring travel lengths (interpedicular travel). More recently, hybrid stabilization has been proposed with an intention to treat patients with segmental lumbar degenerative pathologies. If needed, Stabilimax could also be modified to achieve this goal by using it in conjunction with rigid rod instrumentation. The aim of this study was to evaluate the biomechanics of the decompressed segment (s) implanted with single, multilevel, and hybrid Stabilimax devices with three different spring travel distances. The hypotheses here are 1) the overall stabilization of the decompressed segment implanted with Stabilimax devices does not change with variations in interpedicular travel. 2) A dynamic system in conjunction to a fusion system reduces the risk of adjacent level degeneration as seen in lumbar arthrodesis. A validated 3-D nonlinear finite element model of the intact L3-S1 lumbar spine was used to evaluate the biomechanics of the following devices:a) L4-L5 Single level Stabilimaxb) L3-L4-L5 Multilevel Stabilimaxc) L4-L5-S1 Multilevel Stabilimaxd) L4-L5 Stabilimax + L5-S1 Fusion The intact model was modified to simulate the decompression at the corresponding level(s) followed by the implantation of the devices. The load control and hybrid protocols were used to evaluate these devices. Various biomechanically relevant parameters like Range of motion, Intradiscal pressure, Facet loads, Implant stresses, Instantaneous axis of rotation (COR), Maximum spring forces and displacements were calculated. Results show that different Stabilimax devices are capable of stabilizing the decompressed segment (s) in flexion, extension and lateral bending but not in axial rotation. The overall stabilization of the decompressed segment (s) with Stabilimaxdevices did not alter with variations in interpedicular device travel in most of the cases. The hybrid stabilization system also produced favorable results ascertaining with our hypothesis that a dynamic system in conjunction to a rigid rod system reduces the risk of adjacent level degeneration as seen in lumbar arthrodesis. Advisors/Committee Members: Goel, Vijay (Advisor).

Subjects/Keywords: Biomechanics; Dynamic Stabilization Systems; Biomechanics; Hybrid Stabilization; Finite Element Analysis; Stabilimax

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ambati, D. V. (2010). Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290226430

Chicago Manual of Style (16^th Edition):

Ambati, Divya V. “Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems.” 2010. Masters Thesis, University of Toledo. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290226430.

MLA Handbook (7^th Edition):

Ambati, Divya V. “Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems.” 2010. Web. 10 Apr 2021.

Vancouver:

Ambati DV. Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems. [Internet] [Masters thesis]. University of Toledo; 2010. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290226430.

Council of Science Editors:

Ambati DV. Effect of Design Variables on Biomechanics of Lumbar Spine Implanted with Single, Multilevel and Hybrid Posterior Dynamic Stabilization Systems. [Masters Thesis]. University of Toledo; 2010. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290226430

University of Michigan

9. Reyhanoglu, Mahmut. Control and stabilization of nonholonomic dynamic systems.

Degree: PhD, Mechanical engineering, 1992, University of Michigan

URL: http://hdl.handle.net/2027.42/128946

► A theoretical framework is established for the control of nonholonomic dynamic systems, i.e. dynamic systems with nonintegrable constraints. In particular, we emphasize control properties for… (more)

Subjects/Keywords: Control; Dynamic; Multibody Systems; Nonholonomic; Spacecraft; Stabilization; Sys

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Reyhanoglu, M. (1992). Control and stabilization of nonholonomic dynamic systems. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/128946

Chicago Manual of Style (16^th Edition):

Reyhanoglu, Mahmut. “Control and stabilization of nonholonomic dynamic systems.” 1992. Doctoral Dissertation, University of Michigan. Accessed April 10, 2021. http://hdl.handle.net/2027.42/128946.

MLA Handbook (7^th Edition):

Reyhanoglu, Mahmut. “Control and stabilization of nonholonomic dynamic systems.” 1992. Web. 10 Apr 2021.

Vancouver:

Reyhanoglu M. Control and stabilization of nonholonomic dynamic systems. [Internet] [Doctoral dissertation]. University of Michigan; 1992. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2027.42/128946.

Council of Science Editors:

Reyhanoglu M. Control and stabilization of nonholonomic dynamic systems. [Doctoral Dissertation]. University of Michigan; 1992. Available from: http://hdl.handle.net/2027.42/128946

10. Durand, Anaïs. Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context.

Degree: Docteur es, Informatique, 2017, Grenoble Alpes

URL: http://www.theses.fr/2017GREAM037

►

Les systèmes distribués sont de plus en plus grands et complexes, alors que leur utilisation s'étend à de nombreux domaines (par exemple, les communications, la… (more)

▼

Les systèmes distribués sont de plus en plus grands et complexes, alors que leur utilisation s'étend à de nombreux domaines (par exemple, les communications, la domotique, la surveillance, le ``cloud''). Par conséquent, les contextes d'exécution des systèmes distribués sont très divers. Dans cette thèse, nous nous focalisons sur des contextes incertains, autrement dit, le contexte n'est pas complètement connu au départ ou il est changeant. Plus précisément, nous nous focalisons sur deux principaux types d'incertitudes : une identification incomplète des processus et la présence de fautes. L'absence d'identification est fréquente dans de grands réseaux composés d'appareils produits et déployés en masse. De plus, l'anonymat est souvent une demande pour la sécurité et la confidentialité. De la même façon, les grands réseaux sont exposés aux pannes comme la panne définitive d'un processus ou une perte de connexion sans fil. Néanmoins, le service fourni doit rester disponible.Cette thèse est composée de quatre contributions principales. Premièrement, nous étudions le problème de l'élection de leader dans les anneaux unidirectionnels de processus homonymes (les processus sont identifiés mais leur ID n'est pas forcément unique). Par la suite, nous proposons un algorithme d'élection de leader silencieux et autostabilisant pour tout réseau connecté. Il s'agit du premier algorithme fonctionnant sous de telles conditions qui stabilise en un nombre polynomial de pas de calcul. La troisième contribution est une nouvelle propriété de stabilisation conçue pour les réseaux dynamiques qui garantit des convergences rapides et progressives après des changements topologiques. Nous illustrons cette propriété avec un algorithme de synchronisation d'horloges. Finalement, nous considérons la question de la concurrence dans les problèmes d'allocation de ressources. En particulier, nous étudions le niveau de concurrence qui peut être atteint dans une grande classe de problèmes d'allocation de ressources, l'allocation de ressources locales.

Distributed systems become increasingly wide and complex, while their usage extends to various domains (e.g., communication, home automation, monitoring, cloud computing). Thus, distributed systems are executed in diverse contexts. In this thesis, we focus on uncertain contexts, i.e., the context is not completely known a priori or is unsettled. More precisely, we consider two main kinds of uncertainty: processes that are not completely identified and the presence of faults. The absence of identification is frequent in large networks composed of massively produced and deployed devices. In addition, anonymity is often required for security and privacy. Similarly, large networks are exposed to faults (e.g, process crashes, wireless connection drop), but the service must remain available.This thesis is composed of four main contributions. First, we study the leader election problem in unidirectional rings of homonym processes, i.e., processes are identified but their ID is not necessarily unique. Then, we…

Advisors/Committee Members: Altisen, Karine (thesis director), Devismes, Stéphane (thesis director).

Subjects/Keywords: Algorithmes distribués; Tolérance aux pannes; Autostabilisation; Anonymat; Réseaux dynamiques; Distributed algorithms; Fault-Tolerance; Self-Stabilization; Anonymity; Dynamic networks

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Durand, A. (2017). Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context. (Doctoral Dissertation). Grenoble Alpes. Retrieved from http://www.theses.fr/2017GREAM037

Chicago Manual of Style (16^th Edition):

Durand, Anaïs. “Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context.” 2017. Doctoral Dissertation, Grenoble Alpes. Accessed April 10, 2021. http://www.theses.fr/2017GREAM037.

MLA Handbook (7^th Edition):

Durand, Anaïs. “Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context.” 2017. Web. 10 Apr 2021.

Vancouver:

Durand A. Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context. [Internet] [Doctoral dissertation]. Grenoble Alpes; 2017. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2017GREAM037.

Council of Science Editors:

Durand A. Algorithmes distribués efficaces adaptés à un contexte incertain : Efficient distributed algorithms suited for uncertain context. [Doctoral Dissertation]. Grenoble Alpes; 2017. Available from: http://www.theses.fr/2017GREAM037

University of Iowa

11. Ingalhalikar, Aditya Vikas. Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation.

Degree: PhD, Biomedical Engineering, 2011, University of Iowa

URL: https://ir.uiowa.edu/etd/2717

► The cause and best treatment option for mechanical low back pain due to disc degeneration remains unsolved, despite `spinal fusion' being the gold standard… (more)

▼ The cause and best treatment option for mechanical low back pain due to disc degeneration remains unsolved, despite `spinal fusion' being the gold standard of surgical treatment, post conservative care, for a very long time. However, the potential drawbacks of spinal fusion and the ongoing evolution in the understanding of normal and symptomatic spine biomechanics, biology and mechanobiology in conjunction with the advancements in material sciences, and tissue engineering has led to a change in the clinical perspective towards treatment methodologies for spinal disorders. Clinically, a gradual shift in philosophy is being observed from a `one size fits all', i.e. spinal fusion for all patients with symptomatic low back pain to a `customized approach', i.e. patient and indication specific treatment modalities for spine care. This philosophy has laid the ground for concepts of `motion preservation' and `dynamic stabilization', the former being an established treatment modality in orthopedics for a long time. The aim of the current study is to perform a comprehensive scientific investigation to understand, evaluate and establish the in vitro biomechanical characteristics and performance of indication specific treatment modalities incorporating the concept of Posterolateral Disc Arthroplasty and Posterior Dynamic Stabilization for the treatment of symptomatic mechanical back pain. The results of this comprehensive study may help the clinicians to make an informed decision while selecting and designing a treating modality for their patients. To this end, the current thesis was undertaken to study the biomechanics of indication specific treatment modalities like motion preservation and dynamic stabilization with a goal to guide clinical and product development decision making. Through the comprehensive biomechanical investigation conducted in the current thesis we were able to theoretically prove the importance of a customized approach towards the treatment of spine care. Also, the most important conclusion of the biomechanical investigation was the fact that Range of Motion results alone are not sufficient to draw significant conclusions. It is imperative that in depth analysis of the quality of motion through the determination of instantaneous center of rotation is extremely important. Previous studies have shown only a single center of rotation between the extremes of motion which is also insufficient as the end points do not determine the path taken to reach the endpoints. This in depth analysis is also important for biomedical engineers to design and develop physiologically viable implants that will mimic the performance of the physiologic spine. Clinical studies are extremely important as a next step towards validating this customized approach towards spine care. Advisors/Committee Members: Lim, Tae-Hong (supervisor).

Subjects/Keywords: Center of Rotation; Disc Arthroplasty; Dynamic Stabilization; Indication Specific Treatment; Kinematics; Spine Biomechanics; Biomedical Engineering and Bioengineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ingalhalikar, A. V. (2011). Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation. (Doctoral Dissertation). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/2717

Chicago Manual of Style (16^th Edition):

Ingalhalikar, Aditya Vikas. “Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation.” 2011. Doctoral Dissertation, University of Iowa. Accessed April 10, 2021. https://ir.uiowa.edu/etd/2717.

MLA Handbook (7^th Edition):

Ingalhalikar, Aditya Vikas. “Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation.” 2011. Web. 10 Apr 2021.

Vancouver:

Ingalhalikar AV. Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation. [Internet] [Doctoral dissertation]. University of Iowa; 2011. [cited 2021 Apr 10]. Available from: https://ir.uiowa.edu/etd/2717.

Council of Science Editors:

Ingalhalikar AV. Indication specific treatment modalities for spinal disorders - a comprehensive biomechanical investigation. [Doctoral Dissertation]. University of Iowa; 2011. Available from: https://ir.uiowa.edu/etd/2717

12. Prud'homme, Marion. Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine.

Degree: Docteur es, Biomécanique et ingénierie pour la santé, 2014, Paris, ENSAM

URL: http://www.theses.fr/2014ENAM0066

►

Les douleurs lombaires représentent l'une des premières causes d'intervention chirurgicale dans le monde, et requièrent le recours à une instrumentation du rachis complémentaire pour environ… (more)

▼

Les douleurs lombaires représentent l'une des premières causes d'intervention chirurgicale dans le monde, et requièrent le recours à une instrumentation du rachis complémentaire pour environ 1% des patients. La technique instrumentée standard est l'arthrodèse ; elle consiste en l'immobilisation des vertèbres adjacentes par un système composé de vis pédiculaires et de tiges. Les résultats cliniques sont généralement satisfaisants. Cependant, des cas de complications subsistent, en particulier la dégénérescence du segment adjacent pouvant entraîner une reprise chirurgicale. Pour répondre à ce problème, les implants dits « stabilisation dynamique » ont été conçus avec pour objectif de maintenir une mobilité au niveau instrumenté afin de ne pas sur-contraindre les structures environnantes. Cette étude consiste en l'évaluation clinique et biomécanique d'un de ces implants. Tout d'abord, nous avons mené une campagne d'essais de caractérisation mécanique de l'implant isolé afin de connaître précisément ses propriétés et de pouvoir le modéliser de façon fidèle et validée. Un travail clinique rétrospectif a ensuite été réalisé pour quantifier les résultats obtenus et proposer un protocole d'étude prospective qui réponde aux contraintes cliniques et aux exigences scientifiques actuelles. Une campagne d'essais in-vitro sur segment lombaire a ensuite été menée pour compléter notre connaissance du comportement biomécanique du rachis instrumenté. Ceci nous a permis de valider une modélisation en éléments finis du rachis instrumenté utilisé notamment pour étudier l'influence du design de l'implant ainsi que des gestes réalisés lors de la chirurgie.

Back pain is one of the first causes of surgical intervention in the world and instrumentation is needed for about 1 patient out of 100 . Fusion is the gold standard for instrumented surgery and consists in fixation of two adjacent vertebra together with pedicular screws and rigid rods. Clinical outcomes of fusion are satisfactory but some cases of adverse events remain such as adjacent segment degeneration sometimes leading to revision surgery. Dynamic stabilization devices have been proposed to tackle this issue with the objective of maintaining motion at the instrumented level and thus limiting the surrounding structure overloading. This work aims at assessing one dynamic stabilization device. We first performed mechanical testing on the device to better understand its functioning and come up with a detailed and validated model. Then a retrospective clinical work has been conducted to lay out the clinical performances of the device and propose a prospective study design to answer clinical and scientific requirements. A biomechanical in-vitro testing campaign has been set up to increase our knowledge about the behaviour of the instrumented spine. This enabled us to validate a finite elements model then used for the study of the influence of several design parameters but also of several choices made during the surgery.

Advisors/Committee Members: Skalli, Wafa (thesis director), Rouch, Philippe (thesis director).

Subjects/Keywords: Stabilisation dynamique; Etude clinique; Eléments finis; In-Vitro; Biomécanique; Rachis; Dynamic stabilization; Clinical study; Finite elements; In-Vitro; Biomechanics; Spine

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Prud'homme, M. (2014). Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine. (Doctoral Dissertation). Paris, ENSAM. Retrieved from http://www.theses.fr/2014ENAM0066

Chicago Manual of Style (16^th Edition):

Prud'homme, Marion. “Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine.” 2014. Doctoral Dissertation, Paris, ENSAM. Accessed April 10, 2021. http://www.theses.fr/2014ENAM0066.

MLA Handbook (7^th Edition):

Prud'homme, Marion. “Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine.” 2014. Web. 10 Apr 2021.

Vancouver:

Prud'homme M. Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine. [Internet] [Doctoral dissertation]. Paris, ENSAM; 2014. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2014ENAM0066.

Council of Science Editors:

Prud'homme M. Evaluation clinique et biomécanique d'un implant de stabilisation dynamique du rachis lombaire : Clinical and biomechanical evaluation of a dynamic stabilization device for the lumbar spine. [Doctoral Dissertation]. Paris, ENSAM; 2014. Available from: http://www.theses.fr/2014ENAM0066

University of Toledo

13. Vishnubhotla, Srilakshmi. A Biomechanical Evaluation of Dynamic Stabilization Systems.

Degree: MSin Bioengineering, Bioengineering, 2005, University of Toledo

URL: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1157980281

► Dynamic stabilization may provide a more physiologic alternative to fusion for patients suffering from low back pain. A validated 3-D nonlinear finite element model of… (more)

Subjects/Keywords: Engineering, Biomedical; Spine; fusion; dynamic stabilization; biomechanics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vishnubhotla, S. (2005). A Biomechanical Evaluation of Dynamic Stabilization Systems. (Masters Thesis). University of Toledo. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=toledo1157980281

Chicago Manual of Style (16^th Edition):

Vishnubhotla, Srilakshmi. “A Biomechanical Evaluation of Dynamic Stabilization Systems.” 2005. Masters Thesis, University of Toledo. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1157980281.

MLA Handbook (7^th Edition):

Vishnubhotla, Srilakshmi. “A Biomechanical Evaluation of Dynamic Stabilization Systems.” 2005. Web. 10 Apr 2021.

Vancouver:

Vishnubhotla S. A Biomechanical Evaluation of Dynamic Stabilization Systems. [Internet] [Masters thesis]. University of Toledo; 2005. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1157980281.

Council of Science Editors:

Vishnubhotla S. A Biomechanical Evaluation of Dynamic Stabilization Systems. [Masters Thesis]. University of Toledo; 2005. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=toledo1157980281

Penn State University

14. Chen, Zhouzhou. active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook.

Degree: 2020, Penn State University

URL: https://etda.libraries.psu.edu/catalog/18044zfc5022

► This thesis demonstrates active stabilization of slung loads in high-speed flight by actuating the cargo hook. To show close reference to future vertical lift configurations,… (more)

Subjects/Keywords: Rotorcraft; Slung load; High-speed carriage; Active stabilization; Active cargo hook; Wind-tunnel test; System identification; Feedback control; Dynamic simulation

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Chen, Z. (2020). active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook. (Thesis). Penn State University. Retrieved from https://etda.libraries.psu.edu/catalog/18044zfc5022

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Zhouzhou. “active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook.” 2020. Thesis, Penn State University. Accessed April 10, 2021. https://etda.libraries.psu.edu/catalog/18044zfc5022.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Zhouzhou. “active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook.” 2020. Web. 10 Apr 2021.

Vancouver:

Chen Z. active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook. [Internet] [Thesis]. Penn State University; 2020. [cited 2021 Apr 10]. Available from: https://etda.libraries.psu.edu/catalog/18044zfc5022.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen Z. active stabilization of rotorcraft external slung loads in high speed flight using an active cargo hook. [Thesis]. Penn State University; 2020. Available from: https://etda.libraries.psu.edu/catalog/18044zfc5022

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Peretti, Débora Elisa. Details on the deterministic and stochastic stabilization of an inverted pendulum.

Degree: 2016, Brazil

URL: http://hdl.handle.net/10183/150051

►

Neste trabalho, uma análise quantitativa e qualitativa para a estabilização dinâmica de um pêndulo invertido com uma força externa senoidal aplicada no ponto de suspensão… (more)

▼

Neste trabalho, uma análise quantitativa e qualitativa para a estabilização dinâmica de um pêndulo invertido com uma força externa senoidal aplicada no ponto de suspensão é feita. Inicialmente, a perturbação externa é composta de um único cosseno, então uma generalização é feita, usando uma soma de N cossenos com diferentes amplitudes e frequências. Aproximações são testadas e o tempo durante o qual o pêndulo invertido permanece estável é explorado quando N é grande, a fim de recuperar o padrão do caso onde N = 1. O caso específico de oscilações periódicas e quase periódicas, quando N = 2, é analisado e diagramas de estabilidade considerando diferentes frequências e amplitudes são estudados. Depois, um ruído Gaussiano additivo é adicionado ao sistema para que a degradação dos diagramas de estabilidade gerados por variâncias diferentes possam ser estudados. Todos os pontos deste trabalho são corroborados por simulações, as quais integram numericamente as equações de movimento do sistema através do método de Runge-Kutta de quarta ordem. Os algoritmos e detalhes extras dos métodos de integração usados são explorados numa publicação deste trabalho, a qual está apresentada, nesta dissertação, como um apêndice.

In this work a quantitative and qualitative analysis of the dynamical stabilization of an inverted pendulum with a sinusoidal external perturbation applied at the suspension point is made. Initially, the external perturbation is composed of a single cosine, then a generalization is made using a sum of N cosines with different amplitudes and frequencies. Approximations are tested, and the time for which the inverted pendulum remains stable is explored when N is large, in order to recover the pattern of the case when N = 1. The specific case of periodic and almost periodic oscillations, when N = 2, is analysed and stability diagrams considering different frequencies and amplitudes are studied. Later, an additive Gaussian noise is added to the system so the degradation of the stability diagrams generated by different variances can be studied. All points of this work are corroborated by simulations, which numerically integrate the system’s equation of motion through a fourth order Runge-Kutta method. Algorithms and extra details on the integration methods used are explored in a publication of this work, which is presented in this thesis as an appendix.

Advisors/Committee Members: Silva, Roberto da, Prado, Sandra Denise.

Subjects/Keywords: Sistemas dinâmicos; Processos estocasticos; Oscilacoes; Métodos Runge-Kutta; Simulação numérica; Inverted pendulum; Dynamic stabilization; Parametric excitation; Gaussian noise

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Peretti, D. E. (2016). Details on the deterministic and stochastic stabilization of an inverted pendulum. (Masters Thesis). Brazil. Retrieved from http://hdl.handle.net/10183/150051

Chicago Manual of Style (16^th Edition):

Peretti, Débora Elisa. “Details on the deterministic and stochastic stabilization of an inverted pendulum.” 2016. Masters Thesis, Brazil. Accessed April 10, 2021. http://hdl.handle.net/10183/150051.

MLA Handbook (7^th Edition):

Peretti, Débora Elisa. “Details on the deterministic and stochastic stabilization of an inverted pendulum.” 2016. Web. 10 Apr 2021.

Vancouver:

Peretti DE. Details on the deterministic and stochastic stabilization of an inverted pendulum. [Internet] [Masters thesis]. Brazil; 2016. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10183/150051.

Council of Science Editors:

Peretti DE. Details on the deterministic and stochastic stabilization of an inverted pendulum. [Masters Thesis]. Brazil; 2016. Available from: http://hdl.handle.net/10183/150051

University of Illinois – Urbana-Champaign

16. Rajasegar, Rajavasanth. Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies.

Degree: PhD, Mechanical Engineering, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/100992

► Though modern low-emission combustion strategies have been successful in abating the emission of pollutants in aircraft engines and power generation gas turbines, combustion instability remains… (more)

▼ Though modern low-emission combustion strategies have been successful in abating the emission of pollutants in aircraft engines and power generation gas turbines, combustion instability remains one of the foremost technical challenges in the development of next generation lean premixed combustor technology. Combustion instability is the coupling between unsteady heat release and combustor acoustic modes where one amplifies the other in a feedback loop. This is a complex phenomenon which involves unsteady chemical kinetic, fluid mechanic and acoustic processes that can lead to unstable behavior and could be detrimental in ways ranging from faster part fatigue to catastrophic system failure. Understanding and controlling the onset and propagation of combustion instability is therefore critical to the development of clean and efficient combustion systems. Imaging of combustion radicals has been a cornerstone diagnostic for the field of combustion for the past two decades which allows for visualization of flame structure and behavior. However, resolving both temporal and spatial structures from image-based experimental data can be very challenging. Thus, understanding flame dynamics remains a demanding task and the difficulties often lie in the chaotic and non-linear behavior of the system of interest. To this end, this work investigates the flame dynamics of lean premixed swirl stabilized flames in two distinct configurations using a variety of high fidelity optical and laser diagnostic techniques in conjunction with advanced data / algorithm based post-processing tools. The first part of this work is focused on establishing the effectiveness of microwave plasma discharges in improving combustor flame dynamics through minimizing heat release and pressure fluctuations. The effect of continuous, volumetric, direct coupled, non-equilibrium, atmospheric microwave plasma discharge on a swirl stabilized, lean premixed methane˗air flame was investigated using quantitative OH planar laser induced fluorescence (PLIF), spectrally resolved emission and acoustic pressure measurements. Proper Orthogonal Decomposition (POD) was used to post-process OH-PLIF images to extract information on flame dynamics that are usually lost through classical statistical approaches. Results show that direct plasma coupling accelerates combustion chemistry due to the non-thermal effects of plasma that lead to significantly improved combustor dynamics. Overall, this study demonstrates that microwave direct plasma coupling can drastically enhance dynamic flame stability of swirl stabilized flames especially at very lean operating conditions. The second part of this work is focused on the development of a stable and efficient small-scale combustor architecture with comparable power density, performance and emission characteristics to that of existing large-scale burners with reduced susceptibility to extinction and externally imposed acoustic perturbations while maintaining high combustion efficiency and low emission levels under ultra-lean… Advisors/Committee Members: Lee, Tonghun (advisor), Lee, Tonghun (Committee Chair), Stephani, Kelly (committee member), Chamorro, Leonardo P. (committee member), Kriven, Waltraud M. (committee member).

Subjects/Keywords: lean-premixed combustion; swirl stabilization; combustion instability; flame dynamics; Planar Laser Induced Fluorescence (PLIF); Proper Orthogonal Decomposition (POD); Dynamic Mode Decomposition (DMD); direct plasma coupling; mesoscale array

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rajasegar, R. (2018). Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/100992

Chicago Manual of Style (16^th Edition):

Rajasegar, Rajavasanth. “Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 10, 2021. http://hdl.handle.net/2142/100992.

MLA Handbook (7^th Edition):

Rajasegar, Rajavasanth. “Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies.” 2018. Web. 10 Apr 2021.

Vancouver:

Rajasegar R. Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2142/100992.

Council of Science Editors:

Rajasegar R. Swirl-stabilized lean-premixed flame combustion dynamics: An experimental investigation of flame stabilization, flame dynamics and combustion instability control strategies. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/100992

Virginia Tech

17. Appea, Alexander Kwasi. In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement.

Degree: MS, Civil Engineering, 1997, Virginia Tech

URL: http://hdl.handle.net/10919/9570

► The purpose of a geotextile separator beneath a granular base, or subbase in a flexible pavement system is to prevent the road aggregate and the… (more)

Subjects/Keywords: flexible pavement; dynamic loading; stabilization; geogrid; geotextiles; geosynthetics; falling weight deflectometer

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Appea, A. K. (1997). In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/9570

Chicago Manual of Style (16^th Edition):

Appea, Alexander Kwasi. “In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement.” 1997. Masters Thesis, Virginia Tech. Accessed April 10, 2021. http://hdl.handle.net/10919/9570.

MLA Handbook (7^th Edition):

Appea, Alexander Kwasi. “In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement.” 1997. Web. 10 Apr 2021.

Vancouver:

Appea AK. In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement. [Internet] [Masters thesis]. Virginia Tech; 1997. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/10919/9570.

Council of Science Editors:

Appea AK. In-Situ Behavior of Geosynthetically Stabilized Flexible Pavement. [Masters Thesis]. Virginia Tech; 1997. Available from: http://hdl.handle.net/10919/9570

University of Kentucky

18. Kamat, Sumit Suryakant. FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE.

Degree: 2020, University of Kentucky

URL: https://uknowledge.uky.edu/me_etds/149

► We present filtered-dynamic-inversion (FDI) control for unknown linear time-invariant systems that are multi-input multi-output and minimum phase with unknown-but-bounded relative degree. This FDI controller requires… (more)

Subjects/Keywords: dynamic inversion; high-parameter stabilization; high-gain control; unknown relative degree; control with model uncertainty; Acoustics, Dynamics, and Controls; Controls and Control Theory; Control Theory; Navigation, Guidance, Control, and Dynamics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kamat, S. S. (2020). FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE. (Masters Thesis). University of Kentucky. Retrieved from https://uknowledge.uky.edu/me_etds/149

Chicago Manual of Style (16^th Edition):

Kamat, Sumit Suryakant. “FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE.” 2020. Masters Thesis, University of Kentucky. Accessed April 10, 2021. https://uknowledge.uky.edu/me_etds/149.

MLA Handbook (7^th Edition):

Kamat, Sumit Suryakant. “FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE.” 2020. Web. 10 Apr 2021.

Vancouver:

Kamat SS. FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE. [Internet] [Masters thesis]. University of Kentucky; 2020. [cited 2021 Apr 10]. Available from: https://uknowledge.uky.edu/me_etds/149.

Council of Science Editors:

Kamat SS. FILTERED-DYNAMIC-INVERSION CONTROL FOR UNKNOWN MINIMUM-PHASE SYSTEMS WITH UNKNOWN RELATIVE DEGREE. [Masters Thesis]. University of Kentucky; 2020. Available from: https://uknowledge.uky.edu/me_etds/149

19. Gray, Jayson A. Evaluation of Chemical Stabilization and Incorporation into Pavement Design.

Degree: MS, Civil Engineering (Engineering and Technology), 2014, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398876431

► This thesis examines stabilized subgrade moduli and AASHTO `93 flexible pavement design procedures by in-situ investigation techniques using the dynamic cone penetrometer (DCP). A total… (more)

Subjects/Keywords: Civil Engineering; dynamic cone penetrometer; stabilization; stiffness; resilient moduli

…74 11 CHAPTER 1: INTRODUCTION 1.1.Soil Stabilization Concept Roadways throughout our… …under a pavement structure is chemical stabilization. Based on studies by the Ohio Department… …Rawlings, subgrade stabilization can play a key role in design and durability improvement of… …pavements [2]. Subgrade stabilization is a chemical process in which a chemical additive… …examine the effects of subgrade stabilization and investigate how it can be incorporated into…

11 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gray, J. A. (2014). Evaluation of Chemical Stabilization and Incorporation into Pavement Design. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398876431

Chicago Manual of Style (16^th Edition):

Gray, Jayson A. “Evaluation of Chemical Stabilization and Incorporation into Pavement Design.” 2014. Masters Thesis, Ohio University. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398876431.

MLA Handbook (7^th Edition):

Gray, Jayson A. “Evaluation of Chemical Stabilization and Incorporation into Pavement Design.” 2014. Web. 10 Apr 2021.

Vancouver:

Gray JA. Evaluation of Chemical Stabilization and Incorporation into Pavement Design. [Internet] [Masters thesis]. Ohio University; 2014. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398876431.

Council of Science Editors:

Gray JA. Evaluation of Chemical Stabilization and Incorporation into Pavement Design. [Masters Thesis]. Ohio University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1398876431

20. Erfani Joorabchi, Arash. Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions.

Degree: PhD, Civil Engineering, 2011, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1306105465

► One of the most common ways to stabilize the slope is to use the row of drilled shaft. The goal of this investigation is to… (more)

▼ One of the most common ways to stabilize the slope is to use the row of drilled shaft. The goal of this investigation is to introduce applicable methodology to calculate the factors of safety and force, on the shaft, in the static condition. By using the limit equilibrium approach accompanied with the concept of arching, due to incorporating the drilled shaft, the safety and force can be calculated. The 3-dimensional finite element parametric study is used to derive the regression based semi-empirical equations for quantifying the arching effect, through the load transfer factor. A computer program is written to incorporate the algorithms mentioned above for applications to real cases. The results of the proposed methodology are validated by the three dimension finite element analysis.Furthermore, seismic displacement of the slope, reinforced with a row of the drilled shafts, is calculated using modified displacement based method. This procedure is the extension work of seismic slope stability analysis presented by Bray and Rathje (1998) and Screen analysis presented by Stewart and Blake (2003). In this procedure, dynamic resistance of the dilled shaft/slope system is calculated in framework of limit equilibrium analysis accompanied with the arching due to incorporating the drilled shaft. To quantify the arching, the critical displacement is selected. First, the variation of arching as a function of displacement is studied. Then for critical displacement that causes the maximum force on the shaft and maximum displacement, the arching is quantified and applied to the limit equilibrium analysis. To address the geotechnical and structural issues, the performance based design is proposed to calculate the factor of safety of the drilled shaft slope system and the force on the drilled shafts based on an acceptable displacement. The results of seismic displacement, the factor of safety of slope shaft system, and the maximum induced force on the drilled shaft are validated by 3-dimensional Finite element analysis. Advisors/Committee Members: Liang, Robert (Advisor).

Subjects/Keywords: Engineering; LANDSLIDE STABILIZATION; DRILLED SHAFT; SOIL ARCHING; DYNAMIC; STATIC

…79 4.2 Dynamic Resistance for a Slope/Drilled Shaft System… …111 ix 4.5 The Dynamic Resistance of the Slope Shaft System Obtained by the Proposed… …xiv 4.6 Dynamic FE soil column model… …to other slope stabilization methods. The factor of safety of a slope can be calculated by… …literature regarding stabilization of the slope using the drilled shafts or piles in the static…

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Erfani Joorabchi, A. (2011). Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1306105465

Chicago Manual of Style (16^th Edition):

Erfani Joorabchi, Arash. “Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions.” 2011. Doctoral Dissertation, University of Akron. Accessed April 10, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1306105465.

MLA Handbook (7^th Edition):

Erfani Joorabchi, Arash. “Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions.” 2011. Web. 10 Apr 2021.

Vancouver:

Erfani Joorabchi A. Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions. [Internet] [Doctoral dissertation]. University of Akron; 2011. [cited 2021 Apr 10]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1306105465.

Council of Science Editors:

Erfani Joorabchi A. Landslide Stabilization Using Drilled Shafts in Static and Dynamic Conditions. [Doctoral Dissertation]. University of Akron; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1306105465

21. Oudart, Didier. Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents.

Degree: Docteur es, Génie des Procédés et de l'Environnement, 2013, Toulouse, INSA

URL: http://www.theses.fr/2013ISAT0044

►

La variété des pratiques de compostage et les différences de nature des substrats modifient la vitesse de dégradation de la matière organique (MO), la qualité… (more)

▼

La variété des pratiques de compostage et les différences de nature des substrats modifient la vitesse de dégradation de la matière organique (MO), la qualité finale du compost produit et la part d'émissions sous forme de polluants gazeux. L'optimisation du procédé nécessite la prédiction de ces transformations ou la réalisation d'essais empiriques. Cette thèse analyse les interactions entre les processus biologiques, biochimiques, physico-chimiques et thermodynamiques majeurs à l'origine de la stabilisation de la MO et des émissions gazeuses de CO2, H2O, NH3, N2O. Elle se focalise sur le compostage par aération passive en andain d'effluents d'élevage. La méthode s'appuie sur la modélisation dynamique et des expérimentations. L'impact des interactions entre la biodégradabilité du carbone, la disponibilité de l'azote, l'humidité et la porosité, sur la cinétique et la stœchiométrie des émissions gazeuses est analysé à partir d’observations en conditions contrôlées et sur une plateforme de compostage. Les écarts de répétabilité faibles en conditions contrôlées deviennent élevés en conditions de reproductibilité sur le terrain. Un modèle dynamique de compostage a été développé simulant la stabilisation de la MO et les émissions de CO2, H2O, NH3, N2O. Il est composé de quatre modules simulant les cinétiques d'oxydation de la MO par une population microbienne, les échanges thermiques et l'aération passive, le transfert d'oxygène, les transformations de l'azote. Lors de la phase thermophile, le facteur limitant le plus rapidement l'organisation de la MO est la disponibilité de l'azote. L'abaissement de la porosité entraîne une diminution des pertes gazeuses par l'augmentation de l'organisation de la MO. Le fractionnement initial de la MO ainsi que la teneur initiale en biomasse microbienne sont les facteurs clés pour prédire les cinétiques d'organisation de la MO. La calibration des paramètres d’initialisation du modèle reste à améliorer

The variety of the practices and the differences in nature of the substrates modify the kinetics of degradation of organic matter (OM), the final quality of the produced compost and the fraction emitted as gaseous pollutants. To optimize the composting process, it is required to predict these transformations or to do some empirical test. This thesis analyzes the interactions between the main biological, biochemical, physicochemical and thermodynamic processes which explain the OM stabilization and the gaseous emissions of CO2, H2O, NH3, N2O. Focus is done on windrow composting with passive aeration. The method is based on dynamic semi-empirical modeling of the process and experimentations. The impact of the interactions between bioavailability of carbon and nitrogen, moisture and porosity, on the kinetics and the stoechiometry of the gaseous emissions is analyzed with data gathered in controlled conditions and on a commercial composting plant. The repeatability differences are small in controlled conditions but higher in field conditions. A dynamic model of composting was developed…

Advisors/Committee Members: Paul, Etienne (thesis director).

Subjects/Keywords: Compostage d’effluents d’élevage; Bilan de masse; Bilan thermique; Stabilisation de la matière organique; Azote; Ammoniac; Protoxyde d’azote; Modélisation dynamique; Animal manure composting; Dynamic modeling; Mass balance; Heat balance; Stabilization of organic matter; Nitrogen; Ammonia; Nitrous oxide; 631.875

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Oudart, D. (2013). Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents. (Doctoral Dissertation). Toulouse, INSA. Retrieved from http://www.theses.fr/2013ISAT0044

Chicago Manual of Style (16^th Edition):

Oudart, Didier. “Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents.” 2013. Doctoral Dissertation, Toulouse, INSA. Accessed April 10, 2021. http://www.theses.fr/2013ISAT0044.

MLA Handbook (7^th Edition):

Oudart, Didier. “Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents.” 2013. Web. 10 Apr 2021.

Vancouver:

Oudart D. Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents. [Internet] [Doctoral dissertation]. Toulouse, INSA; 2013. [cited 2021 Apr 10]. Available from: http://www.theses.fr/2013ISAT0044.

Council of Science Editors:

Oudart D. Modélisation de la stabilisation de la matière organique et des émissions gazeuses au cours du compostage d'effluents d'élevage. : Modeling organic matter stabilization and gaseous emissions during windrow composting of livestock effluents. [Doctoral Dissertation]. Toulouse, INSA; 2013. Available from: http://www.theses.fr/2013ISAT0044

Brno University of Technology

22. Kirchner, Tomáš. Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model.

Degree: 2020, Brno University of Technology

URL: http://hdl.handle.net/11012/193019

► Improvement of the current double inverted pendulum model on a cart as well as a new LQG control and swing-up realization are the main goal… (more)

Subjects/Keywords: Dvojité inverzní kyvadlo na vozíku; ozubený řemen; pohybové rovnice; identifikace parametrů; Kálmánův filtr; stabilizace; LQG; swing-up; Double inverted pendulum on a cart; gear belt; dynamic equations; parameters estimation; Kalman filter; stabilization; LQG; swing-up

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kirchner, T. (2020). Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/193019

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kirchner, Tomáš. “Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model.” 2020. Thesis, Brno University of Technology. Accessed April 10, 2021. http://hdl.handle.net/11012/193019.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kirchner, Tomáš. “Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model.” 2020. Web. 10 Apr 2021.

Vancouver:

Kirchner T. Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model. [Internet] [Thesis]. Brno University of Technology; 2020. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/11012/193019.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kirchner T. Návrh a řízení modelu laboratorního dvojitého kyvadla: Design and control of laboratory double pendulum model. [Thesis]. Brno University of Technology; 2020. Available from: http://hdl.handle.net/11012/193019

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Commonwealth University

23. Cox, Bruce. Feedback Stabilization of Inverted Pendulum Models.

Degree: MS, Mathematical Sciences, 2005, Virginia Commonwealth University

URL: https://doi.org/10.25772/TFCY-8N82 ; https://scholarscompass.vcu.edu/etd/1174

► Many mechanical systems exhibit nonlinear movement and are subject to perturbations from a desired equilibrium state. These perturbations can greatly reduce the efficiency of the… (more)

Subjects/Keywords: stability; feedback; inverted pendulum; dynamic feedback controllers; stabilization; static feedback controllers; Jacobian linearization; Physical Sciences and Mathematics

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cox, B. (2005). Feedback Stabilization of Inverted Pendulum Models. (Thesis). Virginia Commonwealth University. Retrieved from https://doi.org/10.25772/TFCY-8N82 ; https://scholarscompass.vcu.edu/etd/1174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cox, Bruce. “Feedback Stabilization of Inverted Pendulum Models.” 2005. Thesis, Virginia Commonwealth University. Accessed April 10, 2021. https://doi.org/10.25772/TFCY-8N82 ; https://scholarscompass.vcu.edu/etd/1174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cox, Bruce. “Feedback Stabilization of Inverted Pendulum Models.” 2005. Web. 10 Apr 2021.

Vancouver:

Cox B. Feedback Stabilization of Inverted Pendulum Models. [Internet] [Thesis]. Virginia Commonwealth University; 2005. [cited 2021 Apr 10]. Available from: https://doi.org/10.25772/TFCY-8N82 ; https://scholarscompass.vcu.edu/etd/1174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cox B. Feedback Stabilization of Inverted Pendulum Models. [Thesis]. Virginia Commonwealth University; 2005. Available from: https://doi.org/10.25772/TFCY-8N82 ; https://scholarscompass.vcu.edu/etd/1174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brigham Young University

24. Quick, Tyler James. Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion.

Degree: MS, 2011, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3714&context=etd

► The first objective of this research was to investigate temporal trends in the mechanical properties of base materials stabilized with asphalt emulsion and to assess… (more)

▼ The first objective of this research was to investigate temporal trends in the mechanical properties of base materials stabilized with asphalt emulsion and to assess the rate at which emulsion-treated base (ETB) design properties are achieved. The second objective of this research was to identify construction and environmental factors most correlated to specific mechanical properties of ETB layers and to determine which construction factors exhibit the greatest variability. Additional statistical analysis was performed to determine if significant differences existed between different test sections on a given project. In this research, three experimental sections were established along a pavement reconstruction project near Saratoga Springs, Utah. Field tests were performed to assess the structural properties of the ETB immediately following construction and at 2, 3, 7, and 14 days; 4 months; and 1 year. Measured values were plotted against time to determine trends in ETB strength development. Several statistical analyses were then performed on the collected data. Modulus values were consistently low in all three sections during the first two weeks of testing, increased dramatically by 4 months, and then decreased considerably by 1 year. During the first two weeks following construction, the average ETB structural coefficient was 0.04. Only two of the three sections reached the design structural coefficient of 0.25, which occurred after approximately 3 months; however, the average structural coefficient measured for all three sections after 1 year of curing, which included a winter, was only 47 percent of the design strength. The results of this research show that, while pavement capacity is sufficient at 4 months, it is severely reduced during the first two weeks and at 1 year. Trafficking under these reduced capacities is not recommended. Statistical analysis showed that gradation, binder change during emulsion treatment, and moisture content have the most significant impact on ETB structural properties. Gradation and binder change during emulsion treatment also exhibited significant variability; tighter specifications on material gradations and improved uniformity in emulsion distribution should therefore be considered. Because of the negative impacts of moisture on ETB strength development, construction should not be performed in conditions of excess moisture.

Subjects/Keywords: asphalt emulsion; Clegg impact soil tester; dynamic cone penetrometer; emulsion-treated base; modulus; portable falling-weight deflectometer; reclaimed asphalt pavement; soil stiffness gauge; spatial variability; stabilization; stiffness; strength gain; temporal variability; Civil and Environmental Engineering

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Quick, T. J. (2011). Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3714&context=etd

Chicago Manual of Style (16^th Edition):

Quick, Tyler James. “Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion.” 2011. Masters Thesis, Brigham Young University. Accessed April 10, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3714&context=etd.

MLA Handbook (7^th Edition):

Quick, Tyler James. “Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion.” 2011. Web. 10 Apr 2021.

Vancouver:

Quick TJ. Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion. [Internet] [Masters thesis]. Brigham Young University; 2011. [cited 2021 Apr 10]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3714&context=etd.

Council of Science Editors:

Quick TJ. Temporal and Spatial Variability in Base Materials Treated with Asphalt Emulsion. [Masters Thesis]. Brigham Young University; 2011. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3714&context=etd

25. Dodgen, Eric Ray. Spinal Implant with Customized and Non-Linear Stiffness.

Degree: MS, 2011, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3698&context=etd

► There is a need for spinal implants that have nonlinear stiffness to provide stabilization if the spine loses stiffness through injury, degeneration, or surgery.… (more)

Subjects/Keywords: spinal implant; dynamic stabilization; motion restoration; disc degeneration; lumbar spine; motion restoration; disc decompression; Mechanical Engineering

…x5B;2]. Dynamic stabilization systems for the functional spinal unit are one such… …technology [3]. Dynamic stabilization systems are meant to stabilize the degenerated… …FlexSuRe™ spinal implant is similar to dynamic stabilization systems in that it can provide… …establishes design requirements for the development of a posterior dynamic re-stabilization system… …mechanism dynamic stabilization system were complex, but not unique. A study of current research…

10 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dodgen, E. R. (2011). Spinal Implant with Customized and Non-Linear Stiffness. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3698&context=etd

Chicago Manual of Style (16^th Edition):

Dodgen, Eric Ray. “Spinal Implant with Customized and Non-Linear Stiffness.” 2011. Masters Thesis, Brigham Young University. Accessed April 10, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3698&context=etd.

MLA Handbook (7^th Edition):

Dodgen, Eric Ray. “Spinal Implant with Customized and Non-Linear Stiffness.” 2011. Web. 10 Apr 2021.

Vancouver:

Dodgen ER. Spinal Implant with Customized and Non-Linear Stiffness. [Internet] [Masters thesis]. Brigham Young University; 2011. [cited 2021 Apr 10]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3698&context=etd.

Council of Science Editors:

Dodgen ER. Spinal Implant with Customized and Non-Linear Stiffness. [Masters Thesis]. Brigham Young University; 2011. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=3698&context=etd

Freie Universität Berlin

26. Trojanowski, Marc. a biomechanical study.

Degree: 2009, Freie Universität Berlin

URL: http://dx.doi.org/10.17169/refubium-8555

► Operative therapy of degenerative instable spinal diseases often includes a fusion of the affected spinal segment. This leads to a relief of pain but also… (more)

▼ Operative therapy of degenerative instable spinal diseases often includes a fusion of the affected spinal segment. This leads to a relief of pain but also to a loss of the segmental function. The resulting overcharge of the adjacent segment may cause a adjacent segment degeneration. Fusion does not treat the causal degenerative processes of the affected segment. The concept of dorsal dynamic stabilization for a therapy of degenerative spinal diseases includes the stabilization of the spinal segment and concurrent a preservation of the spinal function. Thus the degenerative cascade shall be stopped. Previous systems nearly solely have been investigated biomechanical in vitro. Valid data of the biomechanical behavior after in vivo exploration are missing. Therefore it was the aim of this study to characterize the biomechanical properties of a posterior dynamic stabilization system (PDSS) after one year in vivo. 40 sheep of were randomized and distributed into the group A and B. All sheep underwent a nucleotomy of the segment L3/4 to induce disc degeneration. Following the segments L3/4 of the animals of group B were stabilized with the PDSS. Group A was defined as the control group, so no second operation was done. After 12 respectively 48 weeks 10 sheep of every group underwent euthanasia, preparation and biomechanical investigation of the segments L3/4 and L2/3. Neutral Zone (NZ) and Range Of Motion (ROM) were measured bidirectional for flexion/extension, lateral bending and rotation. The segments of group B were tested again after explantation of the PDSS. For comparison biomechanical data of a native segment and a segment after in vitro nucleotomy were available. The PDSS group (group A) showed in the most measurements after 12 and 48 weeks significant less results in comparison to the nucleotomy- group (group B), only the NZ after 48 weeks of the lateral bending and rotation showed no significant differences. All measured deflections of group A, except for the NZ of the lateral bending after 48 weeks, presented results, which were significant less than the deflection of a native segment. The significant difference in comparison to a native segment remained after removal of the PDSS. The results substantiate, that the PDSS is able to stabilize an instable segment. But no physiological movement is achieved. Also clues of a positive influence on the generative process are missing. For that reason the tested system can not comply with the requirements. The biomechanical characteristics resemble a rigid stabilization. Further investigations are needed to develop a dynamic stabilization system which guarantees the function with concurrent stabilization of the segment. Advisors/Committee Members: [email protected] (contact), n (gender), Priv.-Doz. Dr. med. F. Kandziora (firstReferee), Prof. Dr. med. C. Perka (furtherReferee), Prof. Dr. med. A. Krödel (furtherReferee).

Subjects/Keywords: In vivo evaluation; posterior dynamic stabilization system; 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Trojanowski, M. (2009). a biomechanical study. (Thesis). Freie Universität Berlin. Retrieved from http://dx.doi.org/10.17169/refubium-8555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Trojanowski, Marc. “a biomechanical study.” 2009. Thesis, Freie Universität Berlin. Accessed April 10, 2021. http://dx.doi.org/10.17169/refubium-8555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Trojanowski, Marc. “a biomechanical study.” 2009. Web. 10 Apr 2021.

Vancouver:

Trojanowski M. a biomechanical study. [Internet] [Thesis]. Freie Universität Berlin; 2009. [cited 2021 Apr 10]. Available from: http://dx.doi.org/10.17169/refubium-8555.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Trojanowski M. a biomechanical study. [Thesis]. Freie Universität Berlin; 2009. Available from: http://dx.doi.org/10.17169/refubium-8555

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Freie Universität Berlin

27. Guder, Ellen. In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model.

Degree: 2008, Freie Universität Berlin

URL: http://dx.doi.org/10.17169/refubium-4947

► Currently, microsurgical nucleotomy is the state of the art treatment for clinical symptomatic disc protrusion or prolapses. As a result of loss of the nucleus… (more)

Subjects/Keywords: disc degeneration; posterior dynamic stabilization; animal model; histolgy; nucleotomy; 600 Technik, Medizin, angewandte Wissenschaften::610 Medizin und Gesundheit

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Guder, E. (2008). In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model. (Thesis). Freie Universität Berlin. Retrieved from http://dx.doi.org/10.17169/refubium-4947

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Guder, Ellen. “In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model.” 2008. Thesis, Freie Universität Berlin. Accessed April 10, 2021. http://dx.doi.org/10.17169/refubium-4947.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Guder, Ellen. “In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model.” 2008. Web. 10 Apr 2021.

Vancouver:

Guder E. In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model. [Internet] [Thesis]. Freie Universität Berlin; 2008. [cited 2021 Apr 10]. Available from: http://dx.doi.org/10.17169/refubium-4947.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Guder E. In vivo evaluation of posterior dynamic stabilzation in the lumbar ovine disc degeneration model. [Thesis]. Freie Universität Berlin; 2008. Available from: http://dx.doi.org/10.17169/refubium-4947

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Gothenburg / Göteborgs Universitet

28. Ulama, Jeanette. A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties.

Degree: 2016, University of Gothenburg / Göteborgs Universitet

URL: http://hdl.handle.net/2077/41127

► Model systems have expanded our knowledge of numerous phenomena in Colloid Science, such as the appearance of glasses, order-disorder transitions involving crystals and attraction induced… (more)

Subjects/Keywords: colloidal model system; steric stabilization; core-shell; poly(ethylene glycol) (PEG); heptafluorobutyl methactylate (HFBMA); fluorinated; polymer; phase behavior; short-range attractions; semi-batch emulsion polymerization; small angle X-ray scattering (SAXS); smearing effects; dynamic light scattering (DLS); cryogenic-transmission electron microscopy (cryo-TEM)

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ulama, J. (2016). A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties. (Thesis). University of Gothenburg / Göteborgs Universitet. Retrieved from http://hdl.handle.net/2077/41127

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ulama, Jeanette. “A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties.” 2016. Thesis, University of Gothenburg / Göteborgs Universitet. Accessed April 10, 2021. http://hdl.handle.net/2077/41127.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ulama, Jeanette. “A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties.” 2016. Web. 10 Apr 2021.

Vancouver:

Ulama J. A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties. [Internet] [Thesis]. University of Gothenburg / Göteborgs Universitet; 2016. [cited 2021 Apr 10]. Available from: http://hdl.handle.net/2077/41127.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ulama J. A Waterborne Colloidal Model System Consisting of Fluorinated Spheres Bearing Grafted PEG: Synthesis, Characterization and Properties. [Thesis]. University of Gothenburg / Göteborgs Universitet; 2016. Available from: http://hdl.handle.net/2077/41127

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

29. Tran, T.T. Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam.

Degree: 2011, Ipskamp Drukkers

URL: http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9

► Situated in a monsoon-prone humid tropical region, Vietnam is affected by both oceanic and continental climates causing disasters to the country like riverine flooding and… (more)

▼ Situated in a monsoon-prone humid tropical region, Vietnam is affected by both oceanic and continental climates causing disasters to the country like riverine flooding and storm induced damage. The coastal districts of Vietnam have a population of about 18 million habitants, account for nearly one fourth of the total population of the country and locate about 50% of the major towns and cities of Vietnam. Most of the people currently living in the coastal zone have their livelihood mainly relying on marine resources and they are also the most vulnerable to sea-related natural disasters, such as storms and floods. The natural disasters occurring in the coastal strip in the central part of Vietnam, caused by meteorological and oceanographical factors, are intensified by human interventions, like the damming of rivers for various purposes or the extensive deforestation for the creation of agricultural lands. With more than 1,000 km of coastline, the central coast of Vietnam has more than sixty inlets and river mouths discharging into the South China Sea. These systems play a vital role in social-economic activities in the region. The steep rivers with abundant natural but temporally unevenly distributed flows make the low-lying coastal plains in the region prone to inundation by flooding, while the river is almost dry during the rest of the year. Specific topographical features and hydrological characteristics of the region produce a particularly high seasonal geomorphological variation of tidal inlets and river mouths, from narrowing, shoaling or entirely closing in the dry season to widening or breaching in the flood period. Frequent disasters set back development efforts in this poorest region of Vietnam and trap people in a cycle of poverty. Stabilising inlets at the central coast of Vietnam therefore is recognised as one of the priority tasks to mitigate potential risks caused by natural disasters, especially by floods and storms on low-lying coastal plains, and to promote a safe and stable condition for social-economic development in the region. To carry out this task, Vietnam needs both substantial financial and human resources, particularly knowledge and experience in coastal engineering, which is not trivial for a developing country. Additionally, strong seasonal variation of inlets and estuaries contribute to the complexity of problems and raise a necessity to implement a strategy for inlet and river mouth stabilisation under the constraints of a shortage of resources and knowledge. This thesis focuses on tidal inlets and estuaries in a wave-dominated, micro-tidal environment under the influence of episodic river flooding in the central coast of Vietnam. Natural behaviour and morphological stability of tidal inlets, which significantly interact with channel migration, entrance shoaling or closure have been identified and analysed based on field observations, historical satellite images, topographical maps and bathymetrical data. Based on the regional natural settings and hydrodynamic-morphological features,… Advisors/Committee Members: Stive, M.J.F..

Subjects/Keywords: tidal inlet; central coast Vietnam; process-based modeling; inlet stability; dynamic equilibrium; inlet stabilization

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tran, T. T. (2011). Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam. (Doctoral Dissertation). Ipskamp Drukkers. Retrieved from http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9

Chicago Manual of Style (16^th Edition):

Tran, T T. “Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam.” 2011. Doctoral Dissertation, Ipskamp Drukkers. Accessed April 10, 2021. http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9.

MLA Handbook (7^th Edition):

Tran, T T. “Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam.” 2011. Web. 10 Apr 2021.

Vancouver:

Tran TT. Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam. [Internet] [Doctoral dissertation]. Ipskamp Drukkers; 2011. [cited 2021 Apr 10]. Available from: http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9.

Council of Science Editors:

Tran TT. Morphodynamics of seasonally closed coastal inlets at the central coast of Vietnam. [Doctoral Dissertation]. Ipskamp Drukkers; 2011. Available from: http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; urn:NBN:nl:ui:24-uuid:6568947a-fae9-4266-87a2-0204ce940da9 ; http://resolver.tudelft.nl/uuid:6568947a-fae9-4266-87a2-0204ce940da9

30. Bleeker, V.R. (author). A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:0246f578-7eab-4a8b-8cf6-f9249268b743

►

To ensure efficient and reliable operation of power amplifiers it is very important to precisely measure and control the power of the signal they transmit.… (more)

▼

To ensure efficient and reliable operation of power amplifiers it is very important to precisely measure and control the power of the signal they transmit. A device most often used to do precise power measurements of RF systems is the so-called RF power detector. As this detector is used as measurement device the precise measurement ability of the RF power detector is very important. For the precise predictability of the output power of power amplifiers the transfer of the RF power detector has to be fixed and accurately known. In this thesis we develop a new calibration method for the transfer stabilization of logarithmic power detectors. Via thorough investigation at system level and circuit level it is shown that the proposed method can be used to continuously calibrate the transfer of a logarithmic RF power detector to a predefined and fixed position over mismatch, part-to-part spread, temperature and input frequency. The method depends on a novel switching algorithm around a log device that is capable to do continuous slope, intercept and dynamic range correction on the transfer of the logarithmic power detector. When accurate enough, the method would make calibration of each individual device unnecessary. Furthermore a new method is presented that can be used to extend the dynamic range of log detectors. System simulations show that the calibration method leads to the wanted transfer stabilization of the logarithmic power detector. A critical part of the new logarithmic transfer calibration method is the need of an accurate multiplication procedure at the input of the logarithmic device. For this accurate multiplication a new accurate gain fixation procedure for a non-linear high bandwidth gain stage was developed. A big part of the thesis is dedicated to the investigation and circuit implementation of this new accurate and fast gain fixation procedure. The gain stabilization method leads to the implementation of a new innovative gain fixation system, including several new architectural innovations. One of these innovations is the implementation of a new accurate ripple blocking system with relative small form factor and fast response time. Simulation results of the circuit implementation of the gain stabilization system prove that the accuracy of the gain stabilization of the non-linear high bandwidth gain stage is well within the required specifications.

Microelectronics

Electrical Engineering, Mathematics and Computer Science

Advisors/Committee Members: Serdijn, W.A. (mentor).

Subjects/Keywords: RF; power; detection; transfer; stabilization; detectors; calibration; detectors; slope; intercept; dynamic; logarithmic; rms; continuously

…105 5 IMPLEMENTATION OF THE LOGARITHMIC TRANSFER STABILIZATION METHOD… …186 LINEAR GAIN STABILIZATION… …186 7 8.9 METHOD TO EXTENDING THE DYNAMIC RANGE WHEN SLOPE IS FIXATION IS GUARANTEED… …33 Figure 1.19 Dynamic power control… …correction of the dynamic range…

12 more images…

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bleeker, V. R. (. (2012). A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:0246f578-7eab-4a8b-8cf6-f9249268b743

Chicago Manual of Style (16^th Edition):

Bleeker, V R (author). “A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers.” 2012. Masters Thesis, Delft University of Technology. Accessed April 10, 2021. http://resolver.tudelft.nl/uuid:0246f578-7eab-4a8b-8cf6-f9249268b743.

MLA Handbook (7^th Edition):

Bleeker, V R (author). “A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers.” 2012. Web. 10 Apr 2021.

Vancouver:

Bleeker VR(. A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Apr 10]. Available from: http://resolver.tudelft.nl/uuid:0246f578-7eab-4a8b-8cf6-f9249268b743.

Council of Science Editors:

Bleeker VR(. A Continuous Calibration Method For the Transfer Stabilization of Successive Detection Logarithmic Amplifiers. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:0246f578-7eab-4a8b-8cf6-f9249268b743

Open Access Theses and Dissertations