subject:(suspension)

Victoria University of Wellington

1. Broadbent, Lynda. Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools.

Degree: 2013, Victoria University of Wellington

URL: http://hdl.handle.net/10063/2670

► This study investigated the decision making processes used by boards of trustees in schools across a range of deciles in a region of New Zealand.… (more)

▼ This study investigated the decision making processes used by boards of trustees in schools across a range of deciles in a region of New Zealand. The research is framed by two objectives: to gain a broader insight and understanding of the processes used by boards of trustees when making decisions in order to inform a more robust governance system for schools that better responds to the development needs of school board members and educational needs of students; and to explore the ways i.e. skills, knowledge and experience used, in which decisions are made by principals and boards of trustees to stand-down, suspend, exclude and expel students in low/high decile schooling contexts in New Zealand. The inquiry is positioned within a critical educational paradigm, employs a mixed method approach incorporating a case study and survey, and uses a thematic analysis approach to identify themes. The research questions that guide this study are: what factors are the enablers or barriers that influence the decision making process of discipline committees?; how does the current support offered to boards of trustees empower them to make qualified decisions about continuing suspensions or excluding students or are there gaps in the support offered? And; what impact, if any, does the socio-economic area of a school have on the degree of knowledge and capability applied by its trustees when deciding to suspend or exclude/expel students? Data suggest school boards that have followed a sound process incorporating principles of natural justice and that have used quality documentation positively influence the outcome of a discipline committee meeting. The gaps in the current support offered to boards could be addressed by key stakeholders like the Ministry of Education and the New Zealand School Trustees Association committing resources to professional development for board of trustee members. It is often boards of low decile schools that lack confidence in their capability when making decisions about continuing suspensions, excluding and expelling students however, they also believe they are the right people to make that decision. Advisors/Committee Members: Thornton, Kate.

Subjects/Keywords: BOT's; Suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Broadbent, L. (2013). Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools. (Masters Thesis). Victoria University of Wellington. Retrieved from http://hdl.handle.net/10063/2670

Chicago Manual of Style (16^th Edition):

Broadbent, Lynda. “Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools.” 2013. Masters Thesis, Victoria University of Wellington. Accessed September 17, 2019. http://hdl.handle.net/10063/2670.

MLA Handbook (7^th Edition):

Broadbent, Lynda. “Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools.” 2013. Web. 17 Sep 2019.

Vancouver:

Broadbent L. Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools. [Internet] [Masters thesis]. Victoria University of Wellington; 2013. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10063/2670.

Council of Science Editors:

Broadbent L. Investigation into the Decision Making Process of Boards of Trustees Relating to the Suspension, Exclusion and Expulsion of Students in New Zealand Schools. [Masters Thesis]. Victoria University of Wellington; 2013. Available from: http://hdl.handle.net/10063/2670

2. Yeo, Kyong Min. Some aspects of suspension flows: Stokes to turbulent flows.

Degree: PhD, Applied Mathematics, 2011, Brown University

URL: https://repository.library.brown.edu/studio/item/bdr:11343/

► The force-coupling method (FCM) represents the dynamics of low Reynolds number suspension flows through a low-order, regularized multipole expansion and provides an effcient,matrix-free method to… (more)

▼ The force-coupling method (FCM) represents the dynamics of low Reynolds number suspension flows through a low-order, regularized multipole expansion and provides an effcient,matrix-free method to solve the grand mobility problem. In concentrated suspensions,strong short-range lubrication forces lead to ill-conditioned problems for determining hydrodynamic interactions. We present a new robust and effcient numerical scheme, lubrication-corrected FCM (LC-FCM), to solve for the hydrodynamic interactions in suspensions of a large number of hard spheres for any volume fractions under a geometric confinement. In LC-FCM, both the lubrication and far-field interactions are solved as a fully coupled system with only very small additional computation to the standard FCM. A solution procedure to expand LC-FCM for the simulation of finite-Reynolds-number suspension flows is proposed.With the goal of determining the wall effects on rheology and particle dynamics, LC-FCM simulations of suspensions of non-colloidal particles in a Couette flow at zero Reynolds number are performed. It is shown that the suspension field can be divided into three regions depending on the micro-structures; the wall region where a structured particle-layering is dominant, the core region in which the suspension field is quasi-homogeneous, and the buffer region which shows the characteristics of both the particle-layer and the shear structure. Rheological properties and suspension microstructures in each regions are presented. Due to the strong spatial coherency induced by the near-wall density fluctuations, the suspended particles exhibit anomalous diffusion. The diffusion in the wall-normal direction changes from superdiffusion for the particles next to the wall to subdiffusion for the particles near the core of the channel. The intermittent jumps and particle entrapment in near-wall particle layers are responsible for the anomalous diffusion near the wall, while the subdiffusion in the core is related to the overall confinement by the channel walls. At the volume fraction around phi = 0:48, particles near the wall assemble into strings which are organized as a simple hexagonal array. This crystal structure extends into the core of the channel as the volume fraction increases. Now, the relative viscosity becomes a function of both the volume fraction and the ordered state. It is found that the hexagonal structure can be altered by introducing an external torque applied to the suspended particles. The crystal structure is disturbed by negative torques, while positive torque has a favorable effect on the ordered state. Due to the significant changes in suspension micro-structures, rheological parameters such as the shear and vortex viscosities exhibit non-linear responses to the external torques.The dynamics of concentrated suspensions in Poiseuille flows are investigated. A statistical analysis indicates that there is an intermediate region between particle layers near the wall and a plug region in the core, in which the behavior of ensemble averaged… Advisors/Committee Members: Maxey, Martin (Director), Karniadakis, George (Reader), Morris, Jeffrey (Reader).

Subjects/Keywords: Suspension flows

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Yeo, K. M. (2011). Some aspects of suspension flows: Stokes to turbulent flows. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:11343/

Chicago Manual of Style (16^th Edition):

Yeo, Kyong Min. “Some aspects of suspension flows: Stokes to turbulent flows.” 2011. Doctoral Dissertation, Brown University. Accessed September 17, 2019. https://repository.library.brown.edu/studio/item/bdr:11343/.

MLA Handbook (7^th Edition):

Yeo, Kyong Min. “Some aspects of suspension flows: Stokes to turbulent flows.” 2011. Web. 17 Sep 2019.

Vancouver:

Yeo KM. Some aspects of suspension flows: Stokes to turbulent flows. [Internet] [Doctoral dissertation]. Brown University; 2011. [cited 2019 Sep 17]. Available from: https://repository.library.brown.edu/studio/item/bdr:11343/.

Council of Science Editors:

Yeo KM. Some aspects of suspension flows: Stokes to turbulent flows. [Doctoral Dissertation]. Brown University; 2011. Available from: https://repository.library.brown.edu/studio/item/bdr:11343/

3. Gorlier, François. Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams.

Degree: Docteur es, Physique, 2017, Université Paris-Est

URL: http://www.theses.fr/2017PESC1227

►

L’objet de cette thèse expérimentale est l’étude de la rhéologie des mousses de fluides complexes. L’utilisation de matériaux modèles permet de découpler les effets des… (more)

▼

L’objet de cette thèse expérimentale est l’étude de la rhéologie des mousses de fluides complexes. L’utilisation de matériaux modèles permet de découpler les effets des bulles et du fluide complexe sur le comportement rhéologique des mousses. Nous caractérisons notamment le module élastique et la contrainte seuil des mousses de suspension de particules et des mousses d’émulsion. La rhéologie des mousses de particules est fortement dépendante du rapport entre la taille des particules et la taille du réseau interstitiel de la mousse (nœud et bords de Plateau). Lorsque les particules sont suffisamment petites pour être inclues dans le réseau de la mousse, elles peuvent former un squelette granulaire compact. Cette structure mise en place par le drainage de la suspension augmente sensiblement la valeur du module élastique des mousses de particules. En effet, le confinement exercé par les bulles sur le squelette granulaire est à l’origine de l’élasticité de la matrice granulaire. Lorsque taille des particules augmente, ces dernières sont exclues du réseau de la mousse et le module élastique des mousses de particules diminue avec la disparition de la matrice. Les mousses de particules avec un squelette granulaire possèdent l’avantage d’avoir deux sources d’élasticité distinctes : l’élasticité capillaire des bulles et élasticité du squelette granulaire. On peut sommer ces deux contributions pour modéliser le module élastique macroscopique de la mousse, ce n’est pas le cas des mousses d’émulsion. En effet, il existe un couplage entre bulles et la matrice d’émulsion. L’introduction des nombres capillaire élastique et capillaire de Bingham permet de décrire l’évolution respective du module élastique et de la contrainte seuil des mousses d’émulsion. Enfin, l’analyse de la contrainte seuil de ces deux types de mousses permet d’identifier la matrice de particules comme étant un fluide à seuil, et forme un parallèle intéressant entre ces deux mousses à priori dissemblables

The subject of this experimental thesis is the study of the rheology of complex fluid foams. The use of model materials allows decoupling the effects of the bubbles and the complex fluid on the rheological behavior of the foams. In particular, we characterize the elastic modulus and the yield stress of particle-loaded foams and emulsion foams. The rheology of particle-loaded foams is highly dependent on the size ratio between the particle and the interstitial foam network (node and the so called “Plateau borders”). When the particles are small enough to be included in the foam network, they can form a compact granular skeleton. This structure put in place by the drainage of the suspension substantially increases the value of the elastic modulus of the particle-loaded foams. Indeed, the confinement exerted by the bubbles on the granular skeleton is at the origin of the elasticity of the matrix (skeleton). As the size of the particles increases, they are excluded from the foam network and the elastic modulus of the foam particles decreases with the…

Advisors/Committee Members: Pitois, Olivier (thesis director).

Subjects/Keywords: Rhéologie; Mousse; Suspension; Rheology; Foam; Suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Gorlier, F. (2017). Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2017PESC1227

Chicago Manual of Style (16^th Edition):

Gorlier, François. “Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams.” 2017. Doctoral Dissertation, Université Paris-Est. Accessed September 17, 2019. http://www.theses.fr/2017PESC1227.

MLA Handbook (7^th Edition):

Gorlier, François. “Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams.” 2017. Web. 17 Sep 2019.

Vancouver:

Gorlier F. Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams. [Internet] [Doctoral dissertation]. Université Paris-Est; 2017. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2017PESC1227.

Council of Science Editors:

Gorlier F. Rhéologie des mousses de fluides complexes : Rheology of complex fluid foams. [Doctoral Dissertation]. Université Paris-Est; 2017. Available from: http://www.theses.fr/2017PESC1227

Texas A&M University

4. Allen, Justin Aaron. Design of active suspension control based upon use of tubular linear motor and quarter-car model.

Degree: 2008, Texas A&M University

URL: http://hdl.handle.net/1969.1/86036

► The design, fabrication, and testing of a quarter-car facility coupled with various control algorithms are presented in this thesis. An experimental linear tubular motor, capable… (more)

▼ The design, fabrication, and testing of a quarter-car facility coupled with various control algorithms are presented in this thesis. An experimental linear tubular motor, capable of producing a 52-N force, provides control actuation to the model. Controllers consisting of two designs were implemented: a classical controller employing lead and lag networks and a state-space feedback design. Each design was extensively simulated to screen for receptiveness to actuation force limitations and robustness regarding the inexact tire modeling. The goal of each controller was to minimize the acceleration of the sprung mass in the presence of simulated road disturbances, modeled by both sinusoidal and step input excitation wheels. Different reference velocity inputs were applied to the control scheme. Responses to a zero reference were juxtaposed to those that resulted from tracking a reference built off a model that incorporated inertial-frame damping attached to the sprung mass. The outcome of this comparison was that low-frequency disturbances were attenuated better when tracking a zero reference, but the reference relaxation introduced by the inertialframe damping model allowed for better-attenuated high frequency signals. Employing an inertial-frame damping value of 250 N-s/m, the rejected frequency component of the system response synchronous with the disturbance input excitation of 40 rad/s bettered by 33% and 28% when feeding control force from the classical controller and state-space controller, respectively. The experimental analysis conducted on the classical and state-space controllers produced sinusoidal disturbance rejection of at worst 50% within their respective bandwidths. At 25 rad/s, the classical controller was able to remove 80% of the base component synchronous with the disturbance excitation frequency, while the state-space controller filtered out nearly 60%. Analysis on the system's ability to reject step disturbances was greatly confounded with the destructive lateral loading transferred during the excitation process. As a result, subjection to excitation could only occur up to 25 rad/s. At the 20 rad/s response synchronous to the disturbance excitation, the classical and state-space controllers removed 85% and 70% of the disturbance, respectively. Sharp spikes in timebased amplitude were present due to the binding that ensued during testing. Advisors/Committee Members: Kim, Won-jong (advisor), Swaroop, Darbha (committee member), Bhattacharyya, Shankar (committee member).

Subjects/Keywords: control; active suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Allen, J. A. (2008). Design of active suspension control based upon use of tubular linear motor and quarter-car model. (Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/86036

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):

Allen, Justin Aaron. “Design of active suspension control based upon use of tubular linear motor and quarter-car model.” 2008. Thesis, Texas A&M University. Accessed September 17, 2019. http://hdl.handle.net/1969.1/86036.

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

MLA Handbook (7^th Edition):

Allen, Justin Aaron. “Design of active suspension control based upon use of tubular linear motor and quarter-car model.” 2008. Web. 17 Sep 2019.

Vancouver:

Allen JA. Design of active suspension control based upon use of tubular linear motor and quarter-car model. [Internet] [Thesis]. Texas A&M University; 2008. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/1969.1/86036.

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

Council of Science Editors:

Allen JA. Design of active suspension control based upon use of tubular linear motor and quarter-car model. [Thesis]. Texas A&M University; 2008. Available from: http://hdl.handle.net/1969.1/86036

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

5. Sayede Hussein, Assem. Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension.

Degree: Docteur es, Droit, 2013, Paris 1

URL: http://www.theses.fr/2013PA010286

►

Douze ans constituent un délai raisonnable pour faire un bilan global de la procédure de l'article L. 521-1 du Code de justice administrative. L'examen des… (more)

▼

Douze ans constituent un délai raisonnable pour faire un bilan global de la procédure de l'article L. 521-1 du Code de justice administrative. L'examen des évolutions jurisprudentielles et l'analyse des dernières dispositions législatives font percevoir l'élargissement du domaine d'application du mécanisme qui est, dans l'ensemble, cohérent. Doté de nouvelles prérogatives subtiles et redoutables, le juge du référé-suspension assume parfaitement son rôle du juge de l'équilibre et de la nécessité. Il est le garant de la protection provisoire. L'efficacité est le noyau dur de sa fonction. Le changement d'état d'esprit et d'attitude du juge administratif a eu des conséquences à la fois théoriques et pratiques en la matière. De part sa gestion rapide, son accessibilité, son mode de raisonnement et sa créativité, le juge du référé-suspension est juge de la rupture. À cela, s'ajoutent la préoccupation du juge des effets de ses interventions et la flexibilité des mesures prononcées. Disposant ainsi d'une véritable culture de l'urgence, le juge a gagné de la crédibilité et de la légitimité et est, surtout, devenu un concurrent redoutable face à ses homologues, que ce soit au niveau national ou européen. Bien que performant, le juge des référés n'est pas au bout de ses potentialités. La continuité entre le référé- suspension et son ancêtre est tangible. Le système reste imparfait. Nombreux en sont les points perfectibles. Pour y remédier, le juge ainsi que le législateur doivent rester en mouvement.

Twelve years represent reasonable time to make a global report on the procedure of article L.521-1 of Code of adminstrative law. The examination of case law evolution and the analysis of last legal measures allow us to detect an enlargment of field which is consistent. Equipped with new subtly and dreaded prerogatives, summary's judge of suspension of administrative act, assumes perfectly his duty of judging balance and necessity. He is the guarantor of the temporary protection. Efficacity constitutes his function'hard core. The change of state of mind and attitude of administrative judge had consequences both theorical and practical in the subject. Due to his fast management, his accessibility, his way of reasoning and its creativity, the summary's judge of suspension is the judge of breach. Beyond that, are added the judge's preoccupation of teh effects of his intervention and the flexibility of delivered sentences. The judge has won credibility and legitimacy by having a real cukture of emrgency and became a tremendous rival opposite to his homolog on nation-wide or European-wide. Although efficient, summary's judge has more potentialities. The continuity from summary-suspension and his ancestor is real. The system is still imperfect. To solve this, the judge and lawmaker have to stay in alert.

Advisors/Committee Members: Pontier, Jean-Marie (thesis director).

Subjects/Keywords: Procès administratif; Juge du référé-suspension; Référé-suspension; Summary's judge of suspension; Summary-suspension; 340

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Sayede Hussein, A. (2013). Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension. (Doctoral Dissertation). Paris 1. Retrieved from http://www.theses.fr/2013PA010286

Chicago Manual of Style (16^th Edition):

Sayede Hussein, Assem. “Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension.” 2013. Doctoral Dissertation, Paris 1. Accessed September 17, 2019. http://www.theses.fr/2013PA010286.

MLA Handbook (7^th Edition):

Sayede Hussein, Assem. “Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension.” 2013. Web. 17 Sep 2019.

Vancouver:

Sayede Hussein A. Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension. [Internet] [Doctoral dissertation]. Paris 1; 2013. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2013PA010286.

Council of Science Editors:

Sayede Hussein A. Le juge administratif : juge du référé-suspension : Administrative judge : summary's judge of suspension. [Doctoral Dissertation]. Paris 1; 2013. Available from: http://www.theses.fr/2013PA010286

University of Manchester

6. Zhang, Yi. Suspension Dewatering with Aggregate Densification.

Degree: 2014, University of Manchester

URL: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

► This thesis concerns design of two pieces of suspension dewatering equipment (i.e. transient batch settlers and steady state continuous gravity thickeners). In a transient batch… (more)

▼ This thesis concerns design of two pieces of suspension dewatering equipment (i.e. transient batch settlers and steady state continuous gravity thickeners). In a transient batch settler, very slow densification of aggregates within the suspension is considered whilst the drag on the solids in the suspension is assumed to be negligible. The interface of the suspension is then determined by a balance between gravity and the gradient of the compressive yield stress of the gelled suspension. The compressive yield stress functional form in general could be either a weakly gelled formula, or a strongly gelled formula. These formulae differ in the way they behave for solids concentrations in the neighbourhood of the suspension gel point. The effects of the above two gel formulae, the evolution of the compressive yield stress functional form over time during aggregate densification, different initial suspension heights, and different initial feed solids volume fractions upon the predictions of consolidated bed structures and solids volume fractions obtained at the bottom of a batch settler, and upon the evolution of the heights of the suspension and the consolidated bed have been explored. A sufficiently tall initial suspension height might lead to insignificant increases in the solids volume fractions obtained at the bottom of batch settlers after time-dependent aggregate densification. The interfaces of the suspension and the consolidation zone coincide after aggregate densification if the gel point, which increases with time, is larger than the initial feed solids volume fractions. Moreover, the maximum permitted underflow solids fluxes predicted from steady state thickeners have been investigated and compared. Pre-shearing of aggregates which densifies aggregates to have smaller diameters upon entering the thickener is necessary if large underflow solids fluxes and small underflow solids volume fractions are specified. The solids volume fraction at the top of the consolidated bed which is the densified gel point is influenced by the extent of pre-shearing of aggregates. An algorithm for determining this densified gel point has also been developed. In reality, thickeners contain not just a consolidating bed, but also a hindered settling region above it. When the hindered settling region is considered in a thickener, the effects of the extent of aggregate densification that has occurred in the hindered settling region and how that impacts upon thickener performance and sludge rheological properties have been explored in this thesis. A new algorithm for predicting the densified gel point obtained at the top of the consolidated bed has been developed when the hindered settling region is present. The effects of underflow solids volume fractions, aggregate densification rate parameters and pre-shearing of aggregates upon the predictions of maximum permitted underflow solids fluxes, sludge rheological properties, and thickener performance have been explored. The predictions of thickener performance using both the weakly and… Advisors/Committee Members: MARTIN, ALASTAIR AD, Grassia, Paul, Martin, Alastair.

Subjects/Keywords: Suspension;

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Zhang, Y. (2014). Suspension Dewatering with Aggregate Densification. (Doctoral Dissertation). University of Manchester. Retrieved from http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

Chicago Manual of Style (16^th Edition):

Zhang, Yi. “Suspension Dewatering with Aggregate Densification.” 2014. Doctoral Dissertation, University of Manchester. Accessed September 17, 2019. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270.

MLA Handbook (7^th Edition):

Zhang, Yi. “Suspension Dewatering with Aggregate Densification.” 2014. Web. 17 Sep 2019.

Vancouver:

Zhang Y. Suspension Dewatering with Aggregate Densification. [Internet] [Doctoral dissertation]. University of Manchester; 2014. [cited 2019 Sep 17]. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270.

Council of Science Editors:

Zhang Y. Suspension Dewatering with Aggregate Densification. [Doctoral Dissertation]. University of Manchester; 2014. Available from: http://www.manchester.ac.uk/escholar/uk-ac-man-scw:232270

University of Illinois – Urbana-Champaign

7. Shoffstall, Grant W. Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979.

Degree: PhD, Sociology, 2016, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/90878

► This dissertation offers an interpretation of cryonic suspension, or "cryonics," the practice of preserving human corpses by way of perfusing them with chemical protectants and… (more)

▼ This dissertation offers an interpretation of cryonic suspension, or "cryonics," the practice of preserving human corpses by way of perfusing them with chemical protectants and gradually subjecting them, at the pronouncement of legal death, to extremely low temperatures (-360◦ F, -196◦ C), which are then controlled and maintained over the long term by liquid nitrogen filled "cryocapsules." Cryonics is ultimately motivated by the hope that medicine will at some future point achieve the requisite kinds and levels of technology to facilitate the rejuvenation and "reanimation" of the "deanimated," those who lay in cryonic suspension. The interpretation of cryonic suspension that I set forth departs quite abruptly from existing academic engagements with the practice—it is rooted in a wealth of previously unutilized archival materials from the 1960s and 70s, all of which are virtually inaccessible to those operating outside the cryonics community. The interpretation cuts across, takes as its substantive focus, and is periodized with respect to three different though related moments in the history of cryonic suspension: 1) the emergence of cryonics in 1962 and the previously unexamined ties of the practice to the postwar science of cybernetics and NASA’s Cyborg Spaceflight Program; 2) the subsequent performance and material instantiation of cryonics, marked by the plights of those who froze and were frozen throughout the American 1960s and 70s; and, tied to and fomented by the lattermost especially, 3) catastrophic failure, marked by the collapse of the Cryonics Society of New York in 1974, and the discovery, in 1979, of several abandoned, thawed, and radically decomposed cryonics "patients" interned in the Cryonics Society of California’s underground "cryo-crypt" at the Oakwood Memorial Park Cemetery in Chatsworth, California; what is infamously known in cryonics circles as the "Chatsworth Scandal." The dissertation as such offers several novel interpretive claims about cryonic suspension, all of which take shape in sustained dialogue with cultural studies of science and technology, and especially the history of cybernetics. The dissertation’s principle theoretical intervention involves deploying these claims to offer an alternative to prevailing interpretations of cryonic suspension, both popular and academic, as an unintelligible pseudoscientific "anomaly." I argue to the contrary that cryonic suspension emerged in a space produced by what Anthony Giddens and especially Zygmunt Bauman regard as the principle constitutive feature of modern social life—the ultimately futile yet pervasive modern impulse to sequester death, dying, and the dead from the realm of the living. I furthermore argue that the distinctly modern logic of sequestration is replicated in the reigning epistemic norms and practices that shape sociological theory and research proper, in that academic sociology, whatever its professed stripes and leanings, tends overwhelmingly to regard death, narrowly conceived in decidedly modern terms as an "end… Advisors/Committee Members: Gille, Zsuzsa (advisor), Dill, Brian (Committee Chair), Denzin, Norman K. (committee member), Ghamari-Tabrizi, Behrooz (committee member), Stivers, Richard (committee member).

Subjects/Keywords: Cryonic Suspension; Cybernetics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Shoffstall, G. W. (2016). Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/90878

Chicago Manual of Style (16^th Edition):

Shoffstall, Grant W. “Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979.” 2016. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed September 17, 2019. http://hdl.handle.net/2142/90878.

MLA Handbook (7^th Edition):

Shoffstall, Grant W. “Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979.” 2016. Web. 17 Sep 2019.

Vancouver:

Shoffstall GW. Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2016. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/2142/90878.

Council of Science Editors:

Shoffstall GW. Failed futures, broken promises, and the prospect of cybernetic immortality: toward an abundant sociological history of cryonic suspension, 1962-1979. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/90878

8. Griffin-Gay, Monique. An Evaluation Of The In-School Suspension Program At One High School.

Degree: EdD Doctor of Education, Educational Leadership, 2019, National-Louis University

URL: https://digitalcommons.nl.edu/diss/351

► In this program evaluation, I examined the effectiveness of in school suspension (ISS) program at one high school. The literature reviewed argues although ISS… (more)

Subjects/Keywords: education; in-school suspension; suspension; behavior modification; out of school suspension; Educational Leadership

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Griffin-Gay, M. (2019). An Evaluation Of The In-School Suspension Program At One High School. (Doctoral Dissertation). National-Louis University. Retrieved from https://digitalcommons.nl.edu/diss/351

Chicago Manual of Style (16^th Edition):

Griffin-Gay, Monique. “An Evaluation Of The In-School Suspension Program At One High School.” 2019. Doctoral Dissertation, National-Louis University. Accessed September 17, 2019. https://digitalcommons.nl.edu/diss/351.

MLA Handbook (7^th Edition):

Griffin-Gay, Monique. “An Evaluation Of The In-School Suspension Program At One High School.” 2019. Web. 17 Sep 2019.

Vancouver:

Griffin-Gay M. An Evaluation Of The In-School Suspension Program At One High School. [Internet] [Doctoral dissertation]. National-Louis University; 2019. [cited 2019 Sep 17]. Available from: https://digitalcommons.nl.edu/diss/351.

Council of Science Editors:

Griffin-Gay M. An Evaluation Of The In-School Suspension Program At One High School. [Doctoral Dissertation]. National-Louis University; 2019. Available from: https://digitalcommons.nl.edu/diss/351

Loughborough University

9. Md-Yusof, Hazlina. Technologies and control strategies for active railway suspension actuators.

Degree: PhD, 2013, Loughborough University

URL: https://dspace.lboro.ac.uk/2134/11744 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566520

► Future railway trends require travelling at high speeds without deterioration in the ride quality, but further improvement of the ride quality by optimisation of the… (more)

▼ Future railway trends require travelling at high speeds without deterioration in the ride quality, but further improvement of the ride quality by optimisation of the passive suspension components has reached its limits. This suggests that active suspensions should be used. Rigorous studies over the past four decades have shown that this technique is able to overcome the passive suspension limitation in terms of improving the overall ride performance of the railway vehicle with the incorporation of additional active elements i.e. actuators, sensors and processors. The work in this thesis investigates a novel method for controlling the actuators within the suspension system, something which has been neglected in previous studies. It is a particular problem because at higher frequencies, when the suspension is providing isolation of the car body from the track irregularities, the actuator must accommodate the suspension movements whilst producing very small forces, otherwise the ride quality substantially deteriorates. Instead of considering more complex active suspension control strategies, which tend to be complex and may be impractical, the performance of the actuator across the secondary suspension is investigated. This research looks into improving actuator technologies for railway secondary suspensions in order to achieve the full benefits of active control. This thesis explores novel methods to improve the ride quality of the railway vehicle through secondary suspension actuator and controller design, with the ultimate aim of integrating this technology into a fully active railway vehicle. The focus of this active suspension research is therefore upon incorporating real actuator technology, instead of the usual assumption of ideal actuators. For meaningful and reliable research a simple, well established active control strategy is used for assessment to highlight the degradation in the suspension performance compared with the ideal actuators. Preliminary investigation demonstrates significant degradation of the ride quality caused by real actuators in the secondary suspension, and this research looks at methods to reduce this effect. Including actuators within a secondary suspension system is a difficult actuator problem compared to the normal application of actuators such as position control. This is because the actuator controller design process requires the consideration of the interaction of the vehicle suspension. The actuators that have been identified as suitable for the application are the electromechanical and servo-hydraulic types, and these are incorporated across the secondary suspension. The effects of the actuator dynamics have been analysed. Practical classical controllers are used to provide force-feedback control of both types of actuator in the secondary suspension. A variety of actuator control techniques are considered including: optimisation of the actuator controller parameters to solve the multi-objective and multivariable problem, the introduction of feed forward techniques and the use of…

Subjects/Keywords: Railway vehicle; Active suspension; Actuators

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Md-Yusof, H. (2013). Technologies and control strategies for active railway suspension actuators. (Doctoral Dissertation). Loughborough University. Retrieved from https://dspace.lboro.ac.uk/2134/11744 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566520

Chicago Manual of Style (16^th Edition):

Md-Yusof, Hazlina. “Technologies and control strategies for active railway suspension actuators.” 2013. Doctoral Dissertation, Loughborough University. Accessed September 17, 2019. https://dspace.lboro.ac.uk/2134/11744 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566520.

MLA Handbook (7^th Edition):

Md-Yusof, Hazlina. “Technologies and control strategies for active railway suspension actuators.” 2013. Web. 17 Sep 2019.

Vancouver:

Md-Yusof H. Technologies and control strategies for active railway suspension actuators. [Internet] [Doctoral dissertation]. Loughborough University; 2013. [cited 2019 Sep 17]. Available from: https://dspace.lboro.ac.uk/2134/11744 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566520.

Council of Science Editors:

Md-Yusof H. Technologies and control strategies for active railway suspension actuators. [Doctoral Dissertation]. Loughborough University; 2013. Available from: https://dspace.lboro.ac.uk/2134/11744 ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566520

Nelson Mandela Metropolitan University

10. Grigor, Charles Miller. Suspension in the disciplinary process.

Degree: Faculty of Law, 2013, Nelson Mandela Metropolitan University

URL: http://hdl.handle.net/10948/d1020966

► Employers often wrestle with whether or not to suspend an employee and the issue is what needs to be done before an employee could be… (more)

▼ Employers often wrestle with whether or not to suspend an employee and the issue is what needs to be done before an employee could be suspended. Suspending an employee means to deprive him or her from entering the work place for a period of time, due to alleged misconduct which, due to the nature of the alleged misconduct and in the opinion of the employer, warrants the employee not to be in or near the workplace. Section 23 of the Constitution of the Republic of South Africa, affords every employee the right to fair labour practices and this right should be affected by the Labour Relations Act, 1995 (LRA). Unfortunately the LRA only deals with the unfair suspension under the definition of an unfair labour practice in section 186(2) by stating that the meaning of unfair labour practice is any act or omission that arises between an employer and an employee involving the unfair suspension of an employee or any other unfair disciplinary action short of dismissal in respect of an employee. The focus of this document thus is to scrutinise the lack of legislative guidelines relating to the procedural fairness of suspension of employees. It would thus necessitate an overview of the nature of suspension which would be discussed in length by way of referring to the right to suspend an employee as well as the application of the courts in such cases, the distinction between suspension as a preventative, or as a punitive measure and the possibility of suspension resulting in an unfair labour practice. The distinction between preventative and punitive suspensions are highlighted. Since it is not clear when, how and for how long an employee may be suspended, in the absence of clear guidelines, employers have to turn to the courts’ interpretation to get the necessary guidance on the application of a suspension. In order to ensure that the employer, experiencing unnecessary difficulty with the implementation of procedural fairness of suspensions, in a meaningful way, be assisted by the proposal that legislature consider to address this by including clear guidelines under Item 3 of Schedule 8 of the LRA Advisors/Committee Members: Kotze, Marius.

Subjects/Keywords: Employees – Suspension; Labor discipline

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Grigor, C. M. (2013). Suspension in the disciplinary process. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/d1020966

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):

Grigor, Charles Miller. “Suspension in the disciplinary process.” 2013. Thesis, Nelson Mandela Metropolitan University. Accessed September 17, 2019. http://hdl.handle.net/10948/d1020966.

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

MLA Handbook (7^th Edition):

Grigor, Charles Miller. “Suspension in the disciplinary process.” 2013. Web. 17 Sep 2019.

Vancouver:

Grigor CM. Suspension in the disciplinary process. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2013. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10948/d1020966.

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

Council of Science Editors:

Grigor CM. Suspension in the disciplinary process. [Thesis]. Nelson Mandela Metropolitan University; 2013. Available from: http://hdl.handle.net/10948/d1020966

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

Ruhr Universität Bochum

11. Ejtehadi, Mohammad Hesam. Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints.

Degree: 2012, Ruhr Universität Bochum

URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-37864

► Das erste Ziel dieser Arbeit ist die experimentelle Identifizierung der Hauptursachen der Steifigkeitsabnahme in einem spezifischen sphärischen Fahrwerksgelenk während der Einlaufphase. Um die Hauptursachen zu… (more)

Subjects/Keywords: Polyoxymethylene; Suspension; Fahrwerk; Steifigkeit; Sensitivitätsanalyse

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ejtehadi, M. H. (2012). Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-37864

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):

Ejtehadi, Mohammad Hesam. “Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints.” 2012. Thesis, Ruhr Universität Bochum. Accessed September 17, 2019. http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-37864.

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

MLA Handbook (7^th Edition):

Ejtehadi, Mohammad Hesam. “Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints.” 2012. Web. 17 Sep 2019.

Vancouver:

Ejtehadi MH. Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints. [Internet] [Thesis]. Ruhr Universität Bochum; 2012. [cited 2019 Sep 17]. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-37864.

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

Council of Science Editors:

Ejtehadi MH. Experimental analysis and numerical simulation of the running-in phase in spherical suspension joints. [Thesis]. Ruhr Universität Bochum; 2012. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-37864

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

University of Ballarat

12. Kuznetsov, Alexey. Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties.

Degree: 2011, University of Ballarat

URL: http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/62065

► There is a considerable body of research on the modelling and optimization of vehicle suspension systems. The main focus in most publications is an optimization… (more)

▼ There is a considerable body of research on the modelling and optimization of vehicle suspension systems. The main focus in most publications is an optimization procedure undertaken to find the values of the model parameters that satisfy certain operating requirements. However, the methods proposed do not always offer a broad variety of concepts and techniques. Most of these methods aim to find optimal values of suspension system parameters with respect to some optimality criteria that are often not explicitly formulated. In addition, none of the reviewed works utilizes existing guidelines and standards, on the vibration exposure on humans, to formulate optimization criteria. This would produce more applicable results of industrial and commercial merit. It is also important to mention that only a limited number of works offered numerical examples where real road conditions are employed for the optimization procedure. The presented thesis is devoted to development of a methodology for the optimization of vehicle suspension systems on the basis of two criteria: the improved comfort levels and advanced steering properties. The developed methodology is applied to various Australian roads, including highways, city roads, and country roads. It consists of a few steps as detailed below. The first step features the construction of a mathematical model for the vibration analysis of the vehicle suspension system. In the thesis different types of the quarter-car models and different biomechanical models for the driver are considered. All models considered are described by the corresponding systems of linear differential equations. The second step is undertaken to construct criteria to evaluate the comfort levels for the driver and passengers. For this purpose, a criterion was adopted from the ISO 2631 (1997) standards to quantify the comfort levels during a ride. To utilize this criterion, the steady-state vibrations, obtained from the system Differential Equations for various excitation frequencies, have been combined via a novel mathematical approach undertaken to eliminate the need to include the time of exposure in the calculations. This will enhance the applicability of the proposed method and simplify its implementation. 3 The third step is devoted to constructing a criterion to quantify the steering properties of a vehicle. The developed formula, which is based on an engineering understanding of how wheel vibration impacts the force interaction between the wheel and road, is proposed for the first time in the current thesis. The formula will serve as a criterion for advanced handling performance of passenger vehicles. The final step is undertaken to formulate optimization problems for finding the suspension system parameters which ensure improved comfort levels as well as admissible steering performance for the vehicle. For the analysis, these two criteria were employed to construct multi-criteria optimization problems and also singlecriteria optimization problems that incorporate both criteria. The developed methodology…

Subjects/Keywords: Springs and suspension; Automobiles

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kuznetsov, A. (2011). Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties. (Thesis). University of Ballarat. Retrieved from http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/62065

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):

Kuznetsov, Alexey. “Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties.” 2011. Thesis, University of Ballarat. Accessed September 17, 2019. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/62065.

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

MLA Handbook (7^th Edition):

Kuznetsov, Alexey. “Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties.” 2011. Web. 17 Sep 2019.

Vancouver:

Kuznetsov A. Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties. [Internet] [Thesis]. University of Ballarat; 2011. [cited 2019 Sep 17]. Available from: http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/62065.

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

Council of Science Editors:

Kuznetsov A. Optimization of the vehicle suspension systems for improved comfort levels and advanced steering properties. [Thesis]. University of Ballarat; 2011. Available from: http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/62065

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

McGill University

13. Guillemette, Raymond. A passive secondary suspension for a magnetically levitated vehicle.

Degree: M. Eng., Department of Electrical Engineering, 1977, McGill University

URL: http://digitool.library.mcgill.ca/thesisfile53782.pdf

Subjects/Keywords: Magnetic suspension.

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Guillemette, R. (1977). A passive secondary suspension for a magnetically levitated vehicle. (Masters Thesis). McGill University. Retrieved from http://digitool.library.mcgill.ca/thesisfile53782.pdf

Chicago Manual of Style (16^th Edition):

Guillemette, Raymond. “A passive secondary suspension for a magnetically levitated vehicle.” 1977. Masters Thesis, McGill University. Accessed September 17, 2019. http://digitool.library.mcgill.ca/thesisfile53782.pdf.

MLA Handbook (7^th Edition):

Guillemette, Raymond. “A passive secondary suspension for a magnetically levitated vehicle.” 1977. Web. 17 Sep 2019.

Vancouver:

Guillemette R. A passive secondary suspension for a magnetically levitated vehicle. [Internet] [Masters thesis]. McGill University; 1977. [cited 2019 Sep 17]. Available from: http://digitool.library.mcgill.ca/thesisfile53782.pdf.

Council of Science Editors:

Guillemette R. A passive secondary suspension for a magnetically levitated vehicle. [Masters Thesis]. McGill University; 1977. Available from: http://digitool.library.mcgill.ca/thesisfile53782.pdf

14. Tlili, Inès. Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use.

Degree: Docteur es, Optique et Lasers, Physico-chimie, Atmosphère, 2016, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2016LIL10208

►

En raison de leur utilisation répandue dans les soins de santé humaine et animale, les antibiotiques et autres résidus de médicaments sont omniprésents dans l’environnement… (more)

▼

En raison de leur utilisation répandue dans les soins de santé humaine et animale, les antibiotiques et autres résidus de médicaments sont omniprésents dans l’environnement en général et le milieu aquatique particulièrement. Compte tenu de leurs impacts potentiels sur le fonctionnement de l'écosystème et la santé publique, la quantification des résidus de médicaments sur l'environnement est devenue une nécessité. Diverses techniques d'analyse se sont avérées être appropriées pour la détection fiable de tels composés. Cependant, la quantification peut être difficile car ces contaminants émergents sont présents à l’état de traces ou d'ultra-traces. Par conséquent, l'exactitude des analyses environnementales dépend à la fois de l'efficacité et de la robustesse de la méthode d'extraction et de quantification. Des procédures d’analyse de traces de ces contaminants émergents, ont été donc mise au point et des méthodes basées sur des analyses LC-MS/MS ont été développées. Pour les échantillons aqueux, l’extraction est menée sur phase solide (SPE, OASIS HLB). Les MLOQ sont comprises entre 0.2 et 3 ng/L. Pour la matrice solide, la procédure d’extraction à haute température et pression a été utilisée suivie d’une purification SPE. Afin d’évaluer le contexte de la pollution totale, la méthodologique analytique validée a été appliquée à des échantillons d’eaux potables et usées provenant de la France et de la Tunisie. Les résidus de médicament associés à la matière solide en suspension (MES) ont également été quantifiés pour compléter l’évaluation du degré de pollution environnementale.

Due to their widespread use in human and animal health care, antibiotics and other drug residues are ubiquitous in the environment in general and the aquatic environment in particular. Given their potential impacts on the functioning of the ecosystem and public health, the quantification of drug residues on the environment has become a necessity. Various assay techniques have been found to be suitable for the reliable detection of such compounds. However, quantification can be difficult because these emerging contaminants are present in the trace or ultra-trace state. Therefore, the accuracy of environmental analyzes depends on both the effectiveness and the robustness of the extraction and quantification method. Trace analysis procedures for these emerging contaminants were therefore developed and methods based on LC-MS / MS analyzes were also developed. For aqueous samples, extraction is carried out on solid phase (SPE, OASIS HLB). MLOQs range from 0.2 to 3 ng / L. For the solid matrix, the extraction procedure at high temperature and pressure was used followed by SPE purification. To assess the context of total pollution, the validated analytical methodology was applied to drinking and wastewater samples from France and Tunisia. Drug residues associated with suspended solid matter (SSM) were also quantified to complete the assessment of the degree of environmental pollution.

Advisors/Committee Members: Ouddane, Baghdad (thesis director), Ternane, Riadh (thesis director), Net-David, Sopheak (thesis director), Ghorbel-Abid, Ibtissem (thesis director).

Subjects/Keywords: Matières en suspension; 628.168

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Tlili, I. (2016). Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2016LIL10208

Chicago Manual of Style (16^th Edition):

Tlili, Inès. “Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use.” 2016. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed September 17, 2019. http://www.theses.fr/2016LIL10208.

MLA Handbook (7^th Edition):

Tlili, Inès. “Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use.” 2016. Web. 17 Sep 2019.

Vancouver:

Tlili I. Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2016. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2016LIL10208.

Council of Science Editors:

Tlili I. Développement analytique et suivi dans l’environnement des traces des antibiotiques à usage humain et vétérinaire : Analytical development and monitoring in the environment of traces of antibiotics for human and veterinary use. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2016. Available from: http://www.theses.fr/2016LIL10208

Cornell University

15. Qi, Ling. Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions .

Degree: 2014, Cornell University

URL: http://hdl.handle.net/1813/37099

► Two simulation techniques that are used to approach two very different suspension problems - continuum scale 'active fluids' contain living cells that can respond to… (more)

Subjects/Keywords: Dynamic simulation; Particulate suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Qi, L. (2014). Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions . (Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/37099

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):

Qi, Ling. “Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions .” 2014. Thesis, Cornell University. Accessed September 17, 2019. http://hdl.handle.net/1813/37099.

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

MLA Handbook (7^th Edition):

Qi, Ling. “Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions .” 2014. Web. 17 Sep 2019.

Vancouver:

Qi L. Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions . [Internet] [Thesis]. Cornell University; 2014. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/1813/37099.

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

Council of Science Editors:

Qi L. Dynamics Of Orientable Particulate Suspensions: Continuum Simulations Of ‘Living’ Fluids And Meso-Scale Simulations Of Anisotropic Particle Suspensions . [Thesis]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/37099

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

University of Colorado

16. Straw, Asher Hamilton. The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces.

Degree: MS, 2017, University of Colorado

URL: https://scholar.colorado.edu/iphy_gradetds/67

► Bicycle suspension elements smooth the vibrations generated by irregularities in the road or trail surface. However, it is unknown whether the energy put into… (more)

▼ Bicycle suspension elements smooth the vibrations generated by irregularities in the road or trail surface. However, it is unknown whether the energy put into the suspension system exacts a metabolic or mechanical cost. Here, I investigated the effects of suspension systems on the energetics and mechanics of riding bicycles on smooth uphill surfaces in both the sitting and standing positions. Chapter 1: Twelve male cyclists rode at 3.35m/s up a motorized treadmill inclined to 7% grade. All subjects used the same road bike equipped with a steering tube front suspension system. Each subject completed six 5 minute trials separated by 5-minute rest periods, with the suspension system in rigid (locked) and compliant settings. I measured their metabolic rates from oxygen consumption and carbon dioxide production. I also measured their mechanical power outputs. In the sitting position, metabolic power averaged 13.10±0.54 (rigid) and 13.21±0.54 W/kg (compliant). Mechanical power averaged 2.83±0.06 W/kg in both conditions. During standing, metabolic power averaged 14.22±0.73 (rigid) and 14.17±0.81 W/kg (compliant). Mechanical power averaged 2.86±0.03 and 2.87±0.05 W/kg respectively. None of these differences were statistically significant. Chapter 2: Eight male and four female mountain bikers rode at 2.77m/s up a motorized treadmill inclined to 7% grade. Subjects rode a dual-suspension mountain bike. Each subject completed six 5 minute trials separated by 5-minute rest periods, with the suspension set to firm and soft conditions. I measured their metabolic rates from oxygen consumption and carbon dioxide production. I also measured their mechanical power outputs. In the sitting position, metabolic power averaged 11.38±0.48 (firm) and 11.44±0.49 W/kg (soft). Mechanical power averaged 2.54±0.20 W/kg in both conditions. During standing, metabolic power averaged 12.46±0.62 (firm) and 12.63±0.90 W/kg (soft). Mechanical power averaged 2.57±0.21W/kg in both conditions. None of these differences were statistically significant. In conclusion, suspension systems in both road and mountain bikes had no effect (p>0.10) on the metabolic or mechanical power required for bicycle riding on smooth uphill surfaces in either seated or standing positions. Advisors/Committee Members: Rodger Kram, Thomas LaRocca, Alena Grabowski.

Subjects/Keywords: suspension; bicycles; metabolic rates; Biomechanics

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Straw, A. H. (2017). The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/iphy_gradetds/67

Chicago Manual of Style (16^th Edition):

Straw, Asher Hamilton. “The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces.” 2017. Masters Thesis, University of Colorado. Accessed September 17, 2019. https://scholar.colorado.edu/iphy_gradetds/67.

MLA Handbook (7^th Edition):

Straw, Asher Hamilton. “The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces.” 2017. Web. 17 Sep 2019.

Vancouver:

Straw AH. The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces. [Internet] [Masters thesis]. University of Colorado; 2017. [cited 2019 Sep 17]. Available from: https://scholar.colorado.edu/iphy_gradetds/67.

Council of Science Editors:

Straw AH. The Effects of Suspension on the Energetics and Mechanics of Riding Bicycles on Smooth Uphill Surfaces. [Masters Thesis]. University of Colorado; 2017. Available from: https://scholar.colorado.edu/iphy_gradetds/67

Karlstad University

17. Jonsson, Alexander. Design of a trim- and tilt suspension system for a diesel driven outboard engine.

Degree: Science and Technology (starting 2013), 2013, Karlstad University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31593

► This thesis has been done at the company MarineDiesel Sweden, which is currently developing a diesel-powered outboard engine. The focus of the thesis is… (more)

Subjects/Keywords: Outboard; Diesel; Suspension; Vibration damping

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jonsson, A. (2013). Design of a trim- and tilt suspension system for a diesel driven outboard engine. (Thesis). Karlstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31593

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):

Jonsson, Alexander. “Design of a trim- and tilt suspension system for a diesel driven outboard engine.” 2013. Thesis, Karlstad University. Accessed September 17, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31593.

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

MLA Handbook (7^th Edition):

Jonsson, Alexander. “Design of a trim- and tilt suspension system for a diesel driven outboard engine.” 2013. Web. 17 Sep 2019.

Vancouver:

Jonsson A. Design of a trim- and tilt suspension system for a diesel driven outboard engine. [Internet] [Thesis]. Karlstad University; 2013. [cited 2019 Sep 17]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31593.

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

Council of Science Editors:

Jonsson A. Design of a trim- and tilt suspension system for a diesel driven outboard engine. [Thesis]. Karlstad University; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-31593

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

Delft University of Technology

18. Los, J.G. Attenuating vibrations with negative stiffness:.

Degree: 2009, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:05e56ff2-4adf-42f7-b719-2123eb47dfb4

► Many high-tech equipment demands a vibration free environment and can only operate at vibration levels much lower than typical ground vibrations. This high level of… (more)

Subjects/Keywords: vibration isolation; suspension stiffness

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Los, J. G. (2009). Attenuating vibrations with negative stiffness:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:05e56ff2-4adf-42f7-b719-2123eb47dfb4

Chicago Manual of Style (16^th Edition):

Los, J G. “Attenuating vibrations with negative stiffness:.” 2009. Masters Thesis, Delft University of Technology. Accessed September 17, 2019. http://resolver.tudelft.nl/uuid:05e56ff2-4adf-42f7-b719-2123eb47dfb4.

MLA Handbook (7^th Edition):

Los, J G. “Attenuating vibrations with negative stiffness:.” 2009. Web. 17 Sep 2019.

Vancouver:

Los JG. Attenuating vibrations with negative stiffness:. [Internet] [Masters thesis]. Delft University of Technology; 2009. [cited 2019 Sep 17]. Available from: http://resolver.tudelft.nl/uuid:05e56ff2-4adf-42f7-b719-2123eb47dfb4.

Council of Science Editors:

Los JG. Attenuating vibrations with negative stiffness:. [Masters Thesis]. Delft University of Technology; 2009. Available from: http://resolver.tudelft.nl/uuid:05e56ff2-4adf-42f7-b719-2123eb47dfb4

University of Waterloo

19. Karimi Eskandary, Peyman. Interconnected Air Suspensions with Independent Height and Stiffness Tuning.

Degree: 2014, University of Waterloo

URL: http://hdl.handle.net/10012/8414

► Suspensions play a crucial role in vehicle comfort and stability. Different types of suspensions have been proposed to fulfill the essential characteristics of vehicle suspensions.… (more)

▼ Suspensions play a crucial role in vehicle comfort and stability. Different types of suspensions have been proposed to fulfill the essential characteristics of vehicle suspensions. A semi-active suspension with adjustable damper improves the performance of a suspension in different conditions and it is better than a passive suspension in terms of ride comfort and handling. Furthermore, it is not as expensive and complicated as an active suspension. Semi-active suspensions rely on adjustable damping coefficient. A new type of air suspension with independent ride height and stiffness tuning has been developed recently. By using two air chambers in the suspension system, ride height of vehicle and stiffness of suspension can be adjusted independently and simultaneously. The conventional air suspension systems use compressor to pump the air into a single flexible rubber airbag and by inflating the air, the chassis will be raised from the axle (ride height control). In this type of suspensions, the stiffness of spring is not under control. In the new air suspension system, by controlling the air pressure on both chambers, one can tune the suspension stiffness and the ride height of the vehicle at the same time for different driving conditions. The air suspension is also able to maintain the vehicle body at the same height and natural frequency for different load or number of passengers. This thesis discusses about the design analysis of an air suspension with ride height and stiffness tuning. The analytical formulation is developed for the optimum design of the new air suspension system. In this thesis, the interconnection between the pressurized chambers of the new air suspension with ride height and stiffness tuning is studied to further improve the performance. Proper interconnection of air springs can help the suspension system to distribute the load between tires more evenly on rough roads or uneven surfaces. Different configurations in air spring interconnection have different impact on the handling and tire load distribution. To study the effect of air spring interconnection configurations on tires load distribution and vehicle handling, a general mathematical model is developed. This model is used to compare various configurations in detail. Results show that interconnection could improve tire load distributions greatly. It is also shown that improving tire load distribution will deteriorate roll stiffness that in turn deteriorate vehicle handling at higher speeds. Since on rough roads, vehicle’s speed is necessarily low, interconnection will not have adverse effects on vehicle handling when activated.

Subjects/Keywords: Interconnection; Air Suspension; Height; Stiffness

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Karimi Eskandary, P. (2014). Interconnected Air Suspensions with Independent Height and Stiffness Tuning. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/8414

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):

Karimi Eskandary, Peyman. “Interconnected Air Suspensions with Independent Height and Stiffness Tuning.” 2014. Thesis, University of Waterloo. Accessed September 17, 2019. http://hdl.handle.net/10012/8414.

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

MLA Handbook (7^th Edition):

Karimi Eskandary, Peyman. “Interconnected Air Suspensions with Independent Height and Stiffness Tuning.” 2014. Web. 17 Sep 2019.

Vancouver:

Karimi Eskandary P. Interconnected Air Suspensions with Independent Height and Stiffness Tuning. [Internet] [Thesis]. University of Waterloo; 2014. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10012/8414.

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

Council of Science Editors:

Karimi Eskandary P. Interconnected Air Suspensions with Independent Height and Stiffness Tuning. [Thesis]. University of Waterloo; 2014. Available from: http://hdl.handle.net/10012/8414

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

Michigan State University

20. Bottoms, Eric E. Short span suspension bridges (Highway loads H-15).

Degree: 1935, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:14067

Subjects/Keywords: Suspension bridges

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Bottoms, E. E. (1935). Short span suspension bridges (Highway loads H-15). (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:14067

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):

Bottoms, Eric E. “Short span suspension bridges (Highway loads H-15).” 1935. Thesis, Michigan State University. Accessed September 17, 2019. http://etd.lib.msu.edu/islandora/object/etd:14067.

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

MLA Handbook (7^th Edition):

Bottoms, Eric E. “Short span suspension bridges (Highway loads H-15).” 1935. Web. 17 Sep 2019.

Vancouver:

Bottoms EE. Short span suspension bridges (Highway loads H-15). [Internet] [Thesis]. Michigan State University; 1935. [cited 2019 Sep 17]. Available from: http://etd.lib.msu.edu/islandora/object/etd:14067.

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

Council of Science Editors:

Bottoms EE. Short span suspension bridges (Highway loads H-15). [Thesis]. Michigan State University; 1935. Available from: http://etd.lib.msu.edu/islandora/object/etd:14067

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

Queens University

21. Restorick, Miranda. ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION .

Degree: Mechanical and Materials Engineering, 2010, Queens University

URL: http://hdl.handle.net/1974/5417

► Wheelchair users are exposed to whole-body vibrations, particularly when traversing rugged terrain such as in less resourced areas. Suspension systems have been added to wheelchair… (more)

Subjects/Keywords: Wheelchair; Suspension; Vibration; Obstacle Simulator

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Restorick, M. (2010). ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/5417

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):

Restorick, Miranda. “ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION .” 2010. Thesis, Queens University. Accessed September 17, 2019. http://hdl.handle.net/1974/5417.

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

MLA Handbook (7^th Edition):

Restorick, Miranda. “ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION .” 2010. Web. 17 Sep 2019.

Vancouver:

Restorick M. ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION . [Internet] [Thesis]. Queens University; 2010. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/1974/5417.

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

Council of Science Editors:

Restorick M. ADJUSTABLE WHEELCHAIR OBSTACLE SIMULATOR AND INSTRUMENTATION FOR ASSESSING WHEELCHAIR SUSPENSION . [Thesis]. Queens University; 2010. Available from: http://hdl.handle.net/1974/5417

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

22. Ramesh, Shreyas. Optimizing Spring Specification .

Degree: Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap, 2019, Chalmers University of Technology

URL: http://hdl.handle.net/20.500.12380/300179

► Abstract The initial specification for the spring is very crucial for developing a concept design of the suspension system. The spring plays a major role… (more)

Subjects/Keywords: Optimization; Spring Specification; Suspension Spring

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ramesh, S. (2019). Optimizing Spring Specification . (Thesis). Chalmers University of Technology. Retrieved from http://hdl.handle.net/20.500.12380/300179

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):

Ramesh, Shreyas. “Optimizing Spring Specification .” 2019. Thesis, Chalmers University of Technology. Accessed September 17, 2019. http://hdl.handle.net/20.500.12380/300179.

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

MLA Handbook (7^th Edition):

Ramesh, Shreyas. “Optimizing Spring Specification .” 2019. Web. 17 Sep 2019.

Vancouver:

Ramesh S. Optimizing Spring Specification . [Internet] [Thesis]. Chalmers University of Technology; 2019. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/20.500.12380/300179.

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

Council of Science Editors:

Ramesh S. Optimizing Spring Specification . [Thesis]. Chalmers University of Technology; 2019. Available from: http://hdl.handle.net/20.500.12380/300179

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

University of Pretoria

23. Breytenbach, Hendrik Gerhardus Abraham. Optimal vehicle suspension characteristics for increased structural fatigue life.

Degree: Mechanical and Aeronautical Engineering, 2010, University of Pretoria

URL: http://hdl.handle.net/2263/27991

► The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using… (more)

▼ The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using mathematical optimisation. Further challenges exist due to the large variations in vehicle sprung mass. The suspension system must provide adequate isolation from road load inputs throughout its payload operating range. This is imperative if good vehicle structural life is to be ensured. A passive suspension system can only provide optimal isolation at a single payload. The designer of such a suspension system must therefore make a compromise between designing for a fully-laden or unladen payload state. This work deals with suspension optimisation for vehicle structural life. The work mainly addresses two questions: 1) What are the suspension characteristics required to ensure optimal isolation of the vehicle structure from road loads? and 2) If such optimal suspension characteristics can be found, how sensitive are they to changes in vehicle payload? The study aims to answer these questions by examining a Land Rover Defender 110 as case study. An experimentally validated mathematical model of the test vehicle is constructed for the use in sensitivity studies. Mathematical optimisation is performed using the model in order to find the suspension characteristics for optimal structural life of the vehicle under consideration. Sensitivity studies are conducted to determine the robustness of the optimal characteristics and their sensitivity to vehicle payload variation. Recommendations are made for suspension characteristic selection for optimal structural life. AFRIKAANS : Ontwerpers van swaar, veldvoertuig suspensie stelsels staar unieke uitdagings in die gesig. Die ritgemak teenoor hantering kompromie in hierdie voertuie is reeds telkemale ondersoek, ook met wiskundige optimering. Verdere uitdagings bestaan as gevolg van die groot veranderinge in geveerde massa by hierdie voertuie. Die suspensiestelsel moet gepaste isolasie van pad insette oor `n wye reeks van bedryfstoestande lewer. Dit is veral belangrik indien daar verseker wil word dat die voertuig goeie struktuurleeftyd het. `n Passiewe suspensiestelsel kan egter slegs optimale isolasie by `n enkele vragtoestand lewer. Die ontwerper van `n passiewe suspensie stelsel moet dus `n kompromie aangaan tussen ontwerp vir `n vol of leë vragtoestand. Hierdie studie handel oor suspensie optimering vir struktuur leeftyd. Die werk spreek hoofsaaklik twee vraagstukke aan: 1) Watter suspensie karakteristieke word benodig om die voertuig struktuur optimaal van padinsette te isoleer? en 2) Indien sulke optimale karakteristieke gevind kan word, wat is hulle sensitiwiteit vir veranderinge in voertuig vrag? Die studie mik om hierdie vraagstukke aan te spreek deur ondersoeke op `n Land Rover Defender 110 toetsvoertuig. `n Eksperimenteel gevalideerde, wiskundige model van die toetsvoertuig word saamgestel met die oog op sensitiwiteitstudies. Wiskundige optimering word met die model uitgevoer om… Advisors/Committee Members: Prof P S Els (advisor).

Subjects/Keywords: Structural fatigue life; Off-road vehicle suspension system; Vehicle suspension; UCTD

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Breytenbach, H. G. A. (2010). Optimal vehicle suspension characteristics for increased structural fatigue life. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/27991

Chicago Manual of Style (16^th Edition):

Breytenbach, Hendrik Gerhardus Abraham. “Optimal vehicle suspension characteristics for increased structural fatigue life.” 2010. Masters Thesis, University of Pretoria. Accessed September 17, 2019. http://hdl.handle.net/2263/27991.

MLA Handbook (7^th Edition):

Breytenbach, Hendrik Gerhardus Abraham. “Optimal vehicle suspension characteristics for increased structural fatigue life.” 2010. Web. 17 Sep 2019.

Vancouver:

Breytenbach HGA. Optimal vehicle suspension characteristics for increased structural fatigue life. [Internet] [Masters thesis]. University of Pretoria; 2010. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/2263/27991.

Council of Science Editors:

Breytenbach HGA. Optimal vehicle suspension characteristics for increased structural fatigue life. [Masters Thesis]. University of Pretoria; 2010. Available from: http://hdl.handle.net/2263/27991

University of Pretoria

24. Breytenbach, Hendrik Gerhardus Abraham. Optimal vehicle suspension characteristics for increased structural fatigue life .

Degree: 2010, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-09172010-190101/

► The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using… (more)

▼ The designers of heavy, off-road vehicle suspension systems face unique challenges. The ride comfort versus handling compromise in these vehicles has been frequently investigated using mathematical optimisation. Further challenges exist due to the large variations in vehicle sprung mass. The suspension system must provide adequate isolation from road load inputs throughout its payload operating range. This is imperative if good vehicle structural life is to be ensured. A passive suspension system can only provide optimal isolation at a single payload. The designer of such a suspension system must therefore make a compromise between designing for a fully-laden or unladen payload state. This work deals with suspension optimisation for vehicle structural life. The work mainly addresses two questions: 1) What are the suspension characteristics required to ensure optimal isolation of the vehicle structure from road loads? and 2) If such optimal suspension characteristics can be found, how sensitive are they to changes in vehicle payload? The study aims to answer these questions by examining a Land Rover Defender 110 as case study. An experimentally validated mathematical model of the test vehicle is constructed for the use in sensitivity studies. Mathematical optimisation is performed using the model in order to find the suspension characteristics for optimal structural life of the vehicle under consideration. Sensitivity studies are conducted to determine the robustness of the optimal characteristics and their sensitivity to vehicle payload variation. Recommendations are made for suspension characteristic selection for optimal structural life. AFRIKAANS : Ontwerpers van swaar, veldvoertuig suspensie stelsels staar unieke uitdagings in die gesig. Die ritgemak teenoor hantering kompromie in hierdie voertuie is reeds telkemale ondersoek, ook met wiskundige optimering. Verdere uitdagings bestaan as gevolg van die groot veranderinge in geveerde massa by hierdie voertuie. Die suspensiestelsel moet gepaste isolasie van pad insette oor `n wye reeks van bedryfstoestande lewer. Dit is veral belangrik indien daar verseker wil word dat die voertuig goeie struktuurleeftyd het. `n Passiewe suspensiestelsel kan egter slegs optimale isolasie by `n enkele vragtoestand lewer. Die ontwerper van `n passiewe suspensie stelsel moet dus `n kompromie aangaan tussen ontwerp vir `n vol of leë vragtoestand. Hierdie studie handel oor suspensie optimering vir struktuur leeftyd. Die werk spreek hoofsaaklik twee vraagstukke aan: 1) Watter suspensie karakteristieke word benodig om die voertuig struktuur optimaal van padinsette te isoleer? en 2) Indien sulke optimale karakteristieke gevind kan word, wat is hulle sensitiwiteit vir veranderinge in voertuig vrag? Die studie mik om hierdie vraagstukke aan te spreek deur ondersoeke op `n Land Rover Defender 110 toetsvoertuig. `n Eksperimenteel gevalideerde, wiskundige model van die toetsvoertuig word saamgestel met die oog op sensitiwiteitstudies. Wiskundige optimering word met die model uitgevoer om… Advisors/Committee Members: Prof P S Els (advisor).

Subjects/Keywords: Structural fatigue life; Off-road vehicle suspension system; Vehicle suspension; UCTD

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Breytenbach, H. G. (2010). Optimal vehicle suspension characteristics for increased structural fatigue life . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-09172010-190101/

Chicago Manual of Style (16^th Edition):

Breytenbach, Hendrik Gerhardus. “Optimal vehicle suspension characteristics for increased structural fatigue life .” 2010. Masters Thesis, University of Pretoria. Accessed September 17, 2019. http://upetd.up.ac.za/thesis/available/etd-09172010-190101/.

MLA Handbook (7^th Edition):

Breytenbach, Hendrik Gerhardus. “Optimal vehicle suspension characteristics for increased structural fatigue life .” 2010. Web. 17 Sep 2019.

Vancouver:

Breytenbach HG. Optimal vehicle suspension characteristics for increased structural fatigue life . [Internet] [Masters thesis]. University of Pretoria; 2010. [cited 2019 Sep 17]. Available from: http://upetd.up.ac.za/thesis/available/etd-09172010-190101/.

Council of Science Editors:

Breytenbach HG. Optimal vehicle suspension characteristics for increased structural fatigue life . [Masters Thesis]. University of Pretoria; 2010. Available from: http://upetd.up.ac.za/thesis/available/etd-09172010-190101/

25. Brumaud, Coralie. Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension.

Degree: Docteur es, Structures et Matériaux, 2011, Université Paris-Est

URL: http://www.theses.fr/2011PEST1069

►

Dans ce travail, nous choisissons, dans l'optique de mieux comprendre le rôle joué par les éthers de cellulose dans les mortiers monocouches, d'utiliser la rhéomètrie… (more)

▼

Dans ce travail, nous choisissons, dans l'optique de mieux comprendre le rôle joué par les éthers de cellulose dans les mortiers monocouches, d'utiliser la rhéomètrie pour identifier les mécanismes d'action de ces molécules au sein d'une pâte de ciment. Nous développons ainsi les protocoles et l'analyse associée nous permettant, à partir de mesures macroscopiques, d'affiner notre compréhension de ces molécules à une échelle microscopique. Puis, nous extrapolons de nos résultats les conséquences d'une modification du dosage ou des paramètres moléculaires de l'éther dans le cas du mortier monocouche et de sa mise en œuvre. Dans une première partie, nous étudions l'influence de l'ajout d'éthers sur la viscosité du fluide interstitiel d'une suspension cimentaire et le rôle de ce paramètre sur la rétention d'eau. Dans une deuxième partie, nous étudions l'effet des éthers de cellulose sur le seuil d'écoulement et la déformation critique de pâtes de ciment et le rôle de ces paramètres sur la capacité d'adhésion du mortier. Dans une troisième partie, nous étudions l'effet des éthers de cellulose sur la viscosité d'une pâte de ciment et le rôle de ce paramètre sur la facilité de lissage

We choose in this work to use rheology to understand the role of cellulose ethers in render mortars and identify their mechanisms of action in a cement paste. We develop some protocols and their analysis to improve, from macroscopic measurements, our understanding of these molecules at a microscopic scale. We then extrapolate from our results the consequences of a change in amount, nature or chemical structure of the ether on the render mortar fresh properties. In a first part, we study the influence of ethers on the viscosity of a cement paste interstitial fluid and the effect of this viscosity on water retention. In a second part, we study the effect of cellulose ethers on the yield stress and critical deformation of cement pastes and the role of these rheological parameters on the properties of the render mortar. In a third part, we focus on the influence of cellulose ethers on the viscosity of cement pastes and the role of this parameter on the application easiness of the render mortar

Advisors/Committee Members: Roussel, Nicolas (thesis director).

Subjects/Keywords: Ethers de cellulose; Rhéologie; Suspension cimentaire; Cellulose ethers; Rheology; Cementitious suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Brumaud, C. (2011). Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2011PEST1069

Chicago Manual of Style (16^th Edition):

Brumaud, Coralie. “Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension.” 2011. Doctoral Dissertation, Université Paris-Est. Accessed September 17, 2019. http://www.theses.fr/2011PEST1069.

MLA Handbook (7^th Edition):

Brumaud, Coralie. “Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension.” 2011. Web. 17 Sep 2019.

Vancouver:

Brumaud C. Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension. [Internet] [Doctoral dissertation]. Université Paris-Est; 2011. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2011PEST1069.

Council of Science Editors:

Brumaud C. Origines microscopiques des conséquences rhéologiques de l’ajout d’éthers de cellulose dans une suspension cimentaire : Microscopic origins of the rheological consequences of the addition of cellulose ethers in a cementitious suspension. [Doctoral Dissertation]. Université Paris-Est; 2011. Available from: http://www.theses.fr/2011PEST1069

26. Pham, Phong Ngoc. Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts.

Degree: Docteur es, Mécanique et Physique des Fluides, 2016, Aix-Marseille; Université de Floride

URL: http://www.theses.fr/2016AIXM4706

►

Nous avons étudié la dynamique de particules rigides et sphériques immergées dans un écoulement de cisaillement simple et oscillant à bas nombre de Reynolds. Les… (more)

▼

Nous avons étudié la dynamique de particules rigides et sphériques immergées dans un écoulement de cisaillement simple et oscillant à bas nombre de Reynolds. Les particules, au delà d’une déformation critique, se comportent de façon irréversible. La particules suivent alors un processus diffusif appelé: diffusion induite par cisaillement. Dans cette thèse, nous avons montré, par une approche numérique et expérimentale, que les collisions solides entre particules sont à l’origine de ce phénomène. Des simulations numériques ont été effectués afin d’évaluer l’importance relative des forces hydrodynamiques longues portées, des forces de lubrifications et des forces de contact. Deux expériences ont été effectuées afin de mettre en évidence l’influence des contacts solides entre particules. Nous avons étudié la dynamique de 3 particules soumises à un écoulement de cisaillement périodique. Les trajectoires des particules sont irréversibles durant le premier cycle et réversible pour les cycles suivants. En montrant que l’amplitude de l’irréversibilité est corrélée à la rugosité des particules, nous fournissons une preuve évidente que des collisions solides entre particules ont bien lieu et que ces collisions influencent la dynamique des particules. Effectuée dans une suspension homogène, le rôle des contacts a aussi été mis en évidence en montrant que l’amplitude critique de déformation dépend de la rugosité des particules. Un modèle géométrique simple qui considère des `particules effectives’ ayant un volume dépendant de l’amplitude de déformation et de la rugosité des particules, nous a permis de quantitativement reproduire les mesures expérimentales.

Even at low Reynolds number, particles within a shear flow exhibit irreversible dynamics. Many theories have been put forth to explain this phenomenon, the origin of irreversibility remains unclear. An integrated program of experimental and computational studies has been performed to assess the origin of the irreversible behavior of particles. Numerical simulations were used to evaluated the relative importance of long-range hydrodynamic interactions, lubrication, and contact forces. By isolating contribution of these interactions, we have shown that neither the long-range hydrodynamic interactions nor the lubrication are responsible for irreversibility. Solid contacts between particles largely dominate this phenomenon. However, producing realistic results requires both contact interactions and lubrication. Two different experiments were performed to address the role of contacts between particles in sheared suspensions. In the first experiment, the particle trajectories are irreversible during the first cycle but reversible for the next cycles. By showing that the magnitude of irreversibility increases with the particle roughness, we provide direct evidence that contacts occur in viscous flow. Experimental particle trajectories are well captured by the numerical model. In the second experiment, performed in a homogeneous suspension, the role of solid collisions was also…

Advisors/Committee Members: Rahli, Ouamar (thesis director), Butler, Jason E. (thesis director), Metzger, Bloen (thesis director).

Subjects/Keywords: Rhéologie; Suspension; Lubrification; Contact; Irréversibilité; Rheology; Suspension; Lubrication; Contact; Irreversibility

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Pham, P. N. (2016). Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts. (Doctoral Dissertation). Aix-Marseille; Université de Floride. Retrieved from http://www.theses.fr/2016AIXM4706

Chicago Manual of Style (16^th Edition):

Pham, Phong Ngoc. “Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts.” 2016. Doctoral Dissertation, Aix-Marseille; Université de Floride. Accessed September 17, 2019. http://www.theses.fr/2016AIXM4706.

MLA Handbook (7^th Edition):

Pham, Phong Ngoc. “Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts.” 2016. Web. 17 Sep 2019.

Vancouver:

Pham PN. Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts. [Internet] [Doctoral dissertation]. Aix-Marseille; Université de Floride; 2016. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2016AIXM4706.

Council of Science Editors:

Pham PN. Origin of shear-induced diffusion in particulate suspensions : crucial role of solid contacts between particles : Origine de la diffusion induite par cisaillement dans les suspensions de particules : rôle crucial des contacts. [Doctoral Dissertation]. Aix-Marseille; Université de Floride; 2016. Available from: http://www.theses.fr/2016AIXM4706

27. Odet, Margot. Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis.

Degree: Docteur es, Biomécanique, 2016, Lyon

URL: http://www.theses.fr/2016LYSE1135

►

La scoliose infantile est une déformation rachidienne évolutive survenant chez l'enfant de moins de 3 ans. La technique de correction la plus répandue actuellement est… (more)

▼

La scoliose infantile est une déformation rachidienne évolutive survenant chez l'enfant de moins de 3 ans. La technique de correction la plus répandue actuellement est celle des « tiges de croissance ». Cependant, la rigidité du matériel provoque la dégénérescence des disques intervertébraux, ce qui di-minue l'efficacité du traitement. Des études récentes ont montré l'effet bénéfique d'implants flexibles sur les disques. Notre équipe a donc développé le concept d'une suspension implantable qui permet de garder la mobilité axiale des segments instrumentés, associé à un nouveau système de fixation rotulée. Cepen-dant, quelle valeur de raideur permet de préserver les disques tout en corrigeant efficacement la sco-liose ? Cette thèse a donc pour objectifs de démontrer l'intérêt d'une suspension pour les disques inter-vertébraux et d'obtenir des informations quantifiables sur la valeur optimale de raideur. Pour cela des prototypes de suspension avec fixation rotulée, implantables chez le mammifère quadrupède et l'Homme, ont été développés afin d'étudier in vivo et in silico plusieurs gammes de flexibilité. Une étude in vivo sur chèvres adultes saines a été menée pour tester ces prototypes pour 2 raideurs différentes. L'état des disques intervertébraux après 6 mois a été évalué par IRM et par coupes histologiques. En parallèle la biomécanique d'un rachis humain sain puis scoliotique, instrumenté avec différents disposi-tifs (tiges classiques, suspensions, avec ou sans rotules), a été étudiée avec un modèle numérique mul-ti-corps rigides, préalablement validé par comparaison avec des données in vitro de la littérature. Les résultats de l'étude in vivo n'ont pas montré de différence significative entre les différentes instrumentations testées. Un temps d'essai plus long semble nécessaire pour voir apparaître la dégéné-rescence discale. Les simulations numériques ont montré une nette amélioration de la mobilité des segments ins-trumentés avec une suspension rotulée. La majorité de la mobilité est cependant assuré par le nouveau système de fixation et non par la présence d'une plus grande souplesse axiale. La suspension permet néanmoins un gain supplémentaire pour certains mouvements du rachis. Aucune différence significative n'a été constatée entre les 2 valeurs de raideurs étudiées. La présence de fixations rotulée diminue par contre fortement la correction obtenue lors des simulations de chirurgie de distraction. La suspension seule présente un intérêt certain lors de la correc-tion en diminuant les efforts transmis au matériel. Les développements futurs s'orienteraient donc vers une suspension combinée à des fixations rotulées présentant également des raideurs en rotation pour conserver correction et mobilité

Infantile scoliosis is a progressive spinal deformity occurring in children under 3 years-old. The most common currently correction technic is the "growing rods" one. However, the implant rigidity causes intervertebral discs degeneration, which decreases the treatment efficiency. Recent studies have shown the…

Advisors/Committee Members: Massenzio, Michel (thesis director), Lafon-Jalby, Yoann (thesis director), Ronel, Sylvie (thesis director).

Subjects/Keywords: Rachis; Scoliose; Suspension; Raideur; Biomécanique; Spine; Scoliosis; Suspension; Stiffness; Biomechanics; 612.7

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Odet, M. (2016). Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis. (Doctoral Dissertation). Lyon. Retrieved from http://www.theses.fr/2016LYSE1135

Chicago Manual of Style (16^th Edition):

Odet, Margot. “Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis.” 2016. Doctoral Dissertation, Lyon. Accessed September 17, 2019. http://www.theses.fr/2016LYSE1135.

MLA Handbook (7^th Edition):

Odet, Margot. “Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis.” 2016. Web. 17 Sep 2019.

Vancouver:

Odet M. Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis. [Internet] [Doctoral dissertation]. Lyon; 2016. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2016LYSE1135.

Council of Science Editors:

Odet M. Étude biomécanique d’une suspension implantable pour la préservation des disques intervertébraux dans le traitement des scolioses infantiles : Biomechanical study of an implantable suspension for the preservation of the intervertebral discs in the treatment of infantile scoliosis. [Doctoral Dissertation]. Lyon; 2016. Available from: http://www.theses.fr/2016LYSE1135

28. Picard, Clément. Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection.

Degree: Docteur es, Physique, 2018, Lyon

URL: http://www.theses.fr/2018LYSEN015

►

Nous avons étudié expérimentalement la mise en suspension de particules lorsque l’on injecte du gaz à la base d’une couche de grains immergée dans un… (more)

▼

Nous avons étudié expérimentalement la mise en suspension de particules lorsque l’on injecte du gaz à la base d’une couche de grains immergée dans un liquide, en géométrie confinée (cellule de Hele-Shaw). En configuration verticale, le système atteint toujours un régime stationnaire résultant de la compétition entre l’entraînement des grains par la remontée des bulles, et leur sédimentation. Un modèle phénoménologique permet d’expliquer les propriétés de la suspension ainsi formée, et du lit granulaire non affecté par la remontée de gaz. L’effet de la gravité effective dans le système est ensuite considérée. Lorsqu’un état stationnaire existe, la taille du lit granulaire présente un maximum pour un angle d’inclinaison de la cellule de 30-40 degrés environ. Cette observation s’explique par un phénomène particulier de sédimentation, l’effet Boycott. Les propriétés statistiques de la suspension (densité, homogénéité) et des bulles (taille, forme, orientation) ont été caractérisées. On montre en particulier que l’on atteint un plateau pour l’aire de contact entre les trois phases (gaz/liquide/solide) en fonction du débit, indépendamment de la gravité effective – résultat important dans le cadre d’applications à des réactions catalytiques. Enfin, une large exploration de la gamme des paramètres montre, pour des cellules inclinées et certaines valeurs de débit de gaz, l’existence d’un régime oscillant : la taille du lit granulaire varie entre un état « creusé » (suspension très dense) et un état « comblé » (suspension peu concentrée). Une explication est proposée pour les temps de montée et de descente de ces oscillations.

We have studied experimentally particle suspension when injecting a gas at the bottom of an immersed granular layer, in confined geometry (Hele-Shaw cell). In a vertical setup, the system always reaches a stationary state resulting from the competition between grains entrainment by bubble rise, and sedimentation. A phenomenological model makes it possible to explain the properties of the suspension thus formed, and of the granular bed not affected by the gas rise. The influence of the effective gravity in the system is then considered. When a stationary state is reached, the size of the granular bed displays a maximum for a cell inclination angle of about 30-40 degrees. This observation can be explained by referring to a peculiar sedimentation process, the Boycott effect. Statistical properties of the suspension (density, homogeneity) and bubbles (size, shape, orientation) have been characterized. In particular, we show that the contact surface between the three phases (gas/liquid/solid) reaches a plateau when increasing the gas flow-rate, independent of the effective gravity. This result is important in the frame of possible applications to catalytic reactors. Finally, exploring a large range of parameters, we point out the existence of an oscillatory regime for inclined cells in a given range of gas flow-rates: the granular bed size oscillates between an "excavated" state (dense suspension) and a…

Advisors/Committee Members: Vidal, Valérie (thesis director).

Subjects/Keywords: Suspension; Bulles; Injection de gaz; Suspension; Bubbles; Gas injection

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Picard, C. (2018). Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection. (Doctoral Dissertation). Lyon. Retrieved from http://www.theses.fr/2018LYSEN015

Chicago Manual of Style (16^th Edition):

Picard, Clément. “Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection.” 2018. Doctoral Dissertation, Lyon. Accessed September 17, 2019. http://www.theses.fr/2018LYSEN015.

MLA Handbook (7^th Edition):

Picard, Clément. “Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection.” 2018. Web. 17 Sep 2019.

Vancouver:

Picard C. Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection. [Internet] [Doctoral dissertation]. Lyon; 2018. [cited 2019 Sep 17]. Available from: http://www.theses.fr/2018LYSEN015.

Council of Science Editors:

Picard C. Mise en suspension de particules immergées par injection de gaz : Fluid-particle suspension by gas injection. [Doctoral Dissertation]. Lyon; 2018. Available from: http://www.theses.fr/2018LYSEN015

University of Waterloo

29. Azimi, Mohsen. Design, Prototyping, and Testing of an In-Wheel Suspension System.

Degree: 2009, University of Waterloo

URL: http://hdl.handle.net/10012/4748

► This thesis presents a study of a novel suspension system which is placed inside a vehicle's wheel. The In-wheel suspension system isolates the sprung mass… (more)

▼ This thesis presents a study of a novel suspension system which is placed inside a vehicle's wheel. The In-wheel suspension system isolates the sprung mass from excitations similar to conventional suspension systems. In traditional suspension systems the isolation is provided by spacious and complicated mechanisms, and mainly in the vertical direction. However, the in-wheel suspension system, not only fits the suspension mechanism inside the unused space between a wheel’s rim and hub, but also allows for isolation both in vertical and horizontal directions. The main focus of this thesis is to study, investigate, and show the feasibility of applying such suspension system to a vehicle. This research is conducted on low speed, low load, and non-powered vehicles such as hand trucks and baby strollers. This helps to escape from the complications of a complex system like a road vehicle. It also demonstrates the versatility of the in-wheel suspension idea. The objective of the project is to scrutinize a simple but practical in-wheel suspension system and demonstrate its applicability. The research begins with the dynamics modeling of an in-wheel suspension system. This suspension has been previously developed at the University of Waterloo for a wheelchair. The dynamics model evaluates the response of the suspension system and investigates the influence of various design parameters on the in-wheel suspension. The study is then continued to improve the design by replacing its rigid mechanism links with optimized compliant structures. This reduces the system's complexity and weight while boosting its performance. Furthermore, a general optimization code is developed to design and optimize flexible members for in-wheel suspension systems. The optimization program is then used to design and optimize two prototypes for hand trucks. Finally, the in-wheel suspension system for a hand truck is tested and evaluated. The experimental results also verify the simulation results and verify the developed optimization design program.

Subjects/Keywords: In-Wheel Suspension; Rotating Suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Azimi, M. (2009). Design, Prototyping, and Testing of an In-Wheel Suspension System. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/4748

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):

Azimi, Mohsen. “Design, Prototyping, and Testing of an In-Wheel Suspension System.” 2009. Thesis, University of Waterloo. Accessed September 17, 2019. http://hdl.handle.net/10012/4748.

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

MLA Handbook (7^th Edition):

Azimi, Mohsen. “Design, Prototyping, and Testing of an In-Wheel Suspension System.” 2009. Web. 17 Sep 2019.

Vancouver:

Azimi M. Design, Prototyping, and Testing of an In-Wheel Suspension System. [Internet] [Thesis]. University of Waterloo; 2009. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10012/4748.

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

Council of Science Editors:

Azimi M. Design, Prototyping, and Testing of an In-Wheel Suspension System. [Thesis]. University of Waterloo; 2009. Available from: http://hdl.handle.net/10012/4748

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

Brno University of Technology

30. Král, Martin. Víceprvkové nápravy osobních vozidel .

Degree: 2012, Brno University of Technology

URL: http://hdl.handle.net/11012/5159

► Práce obsahuje přehled vybraných konstrukčních řešení víceprvkových náprav používaných u současných osobních automobilů. Jednotlivá konstrukční řešení jsou dále popsána. Dále je uveden přehled dalších dnes… (more)

Subjects/Keywords: Víceprvková náprava; zavěšení; nezávislé zavěšení; Multi-link axle; suspension; independent suspension

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Král, M. (2012). Víceprvkové nápravy osobních vozidel . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/5159

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):

Král, Martin. “Víceprvkové nápravy osobních vozidel .” 2012. Thesis, Brno University of Technology. Accessed September 17, 2019. http://hdl.handle.net/11012/5159.

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

MLA Handbook (7^th Edition):

Král, Martin. “Víceprvkové nápravy osobních vozidel .” 2012. Web. 17 Sep 2019.

Vancouver:

Král M. Víceprvkové nápravy osobních vozidel . [Internet] [Thesis]. Brno University of Technology; 2012. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/11012/5159.

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

Council of Science Editors:

Král M. Víceprvkové nápravy osobních vozidel . [Thesis]. Brno University of Technology; 2012. Available from: http://hdl.handle.net/11012/5159

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

Open Access Theses and Dissertations