cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Effects of buoyancy forces on immiscible oil/water displacements in porous media.
Creators: name: Thirunavu, Subramanian.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1994
Subjects: subject: Applied Mechanics.

description: The effects of buoyancy forces on liquid-liquid displacement processes occurring in porous media are important in a variety of practical situations, in particular during the displacement of oil from partially-depleted underground reservoirs by means of aqueous solutions. Most previous studies involving the visualization of water/oil displacements in porous media have been undertaken in horizontal two-dimensional porous medium cells. The objective of this work was to determine the effects of buoyancy forces on the fingering pattern and oil recovery by conducting immiscible displacement experiments in two-dimensional porous medium cells aligned in the vertical plane. A consolidated porous medium cell was utilized to perform the displacements, which permitted a wide range of experiments to be carried out within an identical porous medium. In order to obtain a clear understanding of the effects of buoyancy forces (both favourable and unfavourable) experiments were carried out in three different modes, namely horizontal, vertical upward, and vertical downward. As the effects of buoyancy forces are almost negligible, in the horizontal mode, recoveries obtained in this mode are used as a reference and compared to those obtained in the other two modes. For the system studied in this work, as the displacing liquid in all cases had a higher density than the displaced liquid, buoyancy forces were always favourable in the vertical upward mode and always unfavourable in the vertical downward mode. The immiscible system employed consisted of heavy paraffin oil and glycerol solution as the displaced and displacing phases respectively. The viscosity ratio was varied by changing the concentration of the glycerol solution. Displacements with five different viscosity ratios were studied. Breakthrough time was measured and fractional oil recovery was calculated. The effects of buoyancy, viscous and capillary forces as well as the injection flow rate were also observed. The results obtained indicate that the buoyancy forces are highly effective at very low flow rates and low viscosity ratios (or high density ratios), and even with a slight increase in the flow rate, buoyancy forces lose their importance quickly.
Pollution, énergie et innovation : vers une nouvelle vision de la croissance économique.
Creators: name: Ayadi, Hichem.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1996
Subjects: subject: Economics, Theory.

description: Cette recherche est une contribution modeste a la problematique environnement et economique. On presente en effet une reflexion sur le probleme de l'effet de serre d'un point de vue economique. Le point de depart de cette etude est l'idee suivante: l'exploitation des "fossiles fuels" est la base de la croissance economique. Elle est aussi la principale cause de l'aggravation de la pollution. Une solution radicale a ce probleme serait l'insertion d'une nouvelle energie dans le processus de production qui soit non polluante et renouvelable. On s'est servi de cette idee pour mener une etude theorique sur l'exploitation optimale de l'energie en presence de l'accumulation du gaz carbonique. L'outil dans cette etude est la technique de controle optimale. Deux modeles ont ete presentes. Chacun de ces modeles se rapporte au probleme suivant: Considerons une economique disposant d'un stock limite de petrole. Cette economie produit un seul bien de consommation suivant une fonction de production agregee qui depend de l'input energetique et de la concentration du gaz carbonique dans l'atmosphere. Cette economie peut se procurer une nouvelle energie appelee energie "backstop". La production de cette derniere necessite l'investissement du capital, dit capital "backstop". Elle necessite egalement un cout variable. Les principales questions posees sont les suivantes: Comment exploiter le stock de petrole d'une facon optimale? Serait-il epuise en un temps fini? Comment s'opere la transition du petrole en energie "backstop"? Serait-elle brusque ou graduelle? Le seuil d'irreversibilite pour la concentration du gaz carbonique serait-il depasse?
Visual art dialogue in personal psychological learning: a private journey with public relevance
Creators: name: Alexander, Loris
Publisher: name: Swinburne
Year: 2024

description: Understanding and managing emotion in psychological therapy is a complex and challenging problem for practitioners and clients. The traditional emphasis on verbal language as the mediating process in therapy is expanding with the inclusion of multimodal creative arts, based on visual, auditory, and kinaesthetic perceptions, to better support the reaccessing of emotion. This can be followed recursively by the use of words to develop narrative and meaning. The main research emphasis in this thesis was on visual art. Studies of other art forms may follow. Philosophical understanding, neuroscience advances and developments in psychological therapy underpin and explain this therapeutic expansion. A qualitative research approach is taken, engaging several different actions from within that research paradigm. The thesis is written as a metaphorical journey and conveys the experience of art dialogue and the experience of researching, as parallel stories. Psychological learning journeys undertaken by its author and a colleague, some clients, therapists and teachers, are described in three encounters. The first encounter explored visual art dialogue as a process addition to a developing experiential phenomenological approach using multimodal creative arts (The MIECAT Process - Lett 2001). The objective was for the colleagues to experience a lengthy creative arts sequence, developing and undertaking the process of visual art dialogue. Multilevel actions and outcomes were recorded throughout the collegial engagement. The collegial encounter required that the co-researchers pursue their own personal psychological meanings and report on their experience of the process. Personal narrative meanings exposed in exploring visual art dialogue, are not discussed, the emphasis being on confirming how actions occurred and their effectiveness for application. Actions stopped where direct verbal therapeutic engagement might occur. Following collegial experience, visual art dialogue was used with clients and other therapists and teachers, to question its broader relevance. The second inquiry, involving three clients of the author, asked how the process would support professional actions in a therapeutic situation. The third encounter engaged other therapists and teachers to expand on questions of by whom and how, art dialogue could be used. Psychological therapy theory suggests process location within a humanistic framework, in an eclectic focus or supporting the development of an experiential, phenomenological psychology process approach based on the known functions of mind and body. The associated personal and professional aspects of the experience of process exploration constituted a step in authorial understanding and may contribute to increasing knowledge of the creative arts applied to psychological therapy.
Literature of settler societies: Albert Camus, S. Yizhar and Amos Oz
Creators: name: Piterberg, Gabriel
Publisher: name: Swinburne
Year: 2024

description: This article is a close, yet contextual, reading of two pairs of literary texts: autobiographical novels by Albert Camus and S. Yizhar; and short stories by Camus and Amos Oz. On this basis a conversation is created between the field of comparative settler colonialism on the one hand, and comparative literature on the other. Reciprocal insight is gained: the literature is related to the material context within which it was produced, and the socio-economic historical structures are illuminated by subjective human experience and consciousness.
An evaluation of an alternative method for determination of intrinsic viscosities.
Creators: name: Biagini, Maurice R.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1998
Subjects: subject: Engineering, Chemical.

description: The intrinsic viscosity obtained from measurements of dilute solution viscosities is often used to determine the average molecular weight and chain dimensions of a polymer as well as the interaction between the polymer and the solvent. Although the measurement of a solution viscosity is a simple task, the evaluation of the intrinsic viscosity is subject to considerable inaccuracies and error magnifications. This is due to the fact that traditional methods for determination of intrinsic viscosities rely on extrapolations beyond the range of the experimental data. Many research efforts have focused on improving the extrapolations by refining the theoretical expressions associated with these extrapolations. In this work, an alternative method developed in this laboratory for determination of intrinsic viscosities is subjected to further evaluation using three different aqueous dilute polyacrylamide solutions. This alternative method does not involve an extrapolation and therefore does not depend on theoretical expressions. A comparison between the results obtained by the traditional methods and the new alternative method demonstrates the effectiveness of the new method in overcoming the difficulties of the former methods.
Event-related potential measures of stimulus change detection during wakefulness and sleep onset.
Creators: name: Sabri, Merav.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2001
Subjects: subject: Psychology, Physiological.

description: The Mismatch Negativity (MMN), an auditory event-related potential (ERPs) reflecting the detection of stimulus change, was recorded during wakefulness and sleep onset. In Experiment l, a 1000 Hz standard stimulus was presented every 600 ms. On 20% of the trials, the standard was changed randomly to either a large 2000 Hz (p = .10) or a small 1100 Hz (p = .10) deviant. During alert wakefulness (reading a book), a long-lasting MMN was elicited by presentation of both the small and the large deviant. During relaxed wakefulness (when the subject was asked to fall asleep) and Stage 2 sleep, the MMN to the large deviant, albeit attenuated, remained statistically significant. To test the hypothesis that sensory memory fades rapidly during sleep, Experiment 3 employed a very rapid rate of stimulus presentation. Experiment 2 was used to identify the optimal stimulus parameters for that test by examining the interactive effects of stimulus probability and stimulus presentation rate on the MMN during wakefulness. Auditory stimuli were 1000 Hz standard and 1100 Hz deviant. Stimulus probability was varied across stimulus-onset asynchronies (SOAs) of 150, 600, and 2400 ms. A long-lasting MMN was evident in all conditions except at the longest SOA (2400 ms). When the SOA was 150 ms, the largest MMN was elicited to the lowest deviant probability. In Experiment 3, a long-lasting MMN was elicited in alert wakefulness to either a small deviation (1100 Hz, p = .033) or a large deviation (2000 Hz, p = .033) from the standard (1000 Hz) in auditory frequency. SOA was 150 ms. A long-lasting MMN to the large deviant was observed during relaxed wakefulness, Stage 1 sleep, and non-REM sleep. The results of these experiments support the hypothesis that the MMN comparison system is at least partially automatic. It can be elicited during non-REM sleep, at least to large deviations in auditory frequency. The MMN following a small deviant is, however, difficult to observe during Stage 1 sleep or even as soon as relaxed wakefulness. It is possible that, during sleep onset, cortical encoding of both standard and deviant stimuli is weakened because of prior thalamic inhibition of sensory input.
Der Umsetzungsprozess des Abfallvermeidungsprogramms - Stand, Schwerpunkte, Herausforderungen
Creators: name: Erler, Nora-Phoebe
name: Krause, Susann
Publisher: name: My University
Year: 2015

description: Vor dem Hintergrund wachsender Weltbevölkerung und knapper werdender Ressourcen ist Abfallvermeidung eine der wichtigen Zukunftsaufgaben. Das nach den Vorgaben der Abfallrahmenrichtlinie erstellte "Abfallvermeidungsprogramm des Bundes unter Beteiligung der Länder" adressiert 34 Abfallvermeidungsmaßnahmen. Einen wesentlichen Schwerpunkt des Umsetzungsprozesses bilden themenbezogene Dialoge zu einzelnen Maßnahmengruppen. Ziel ist es, Ansätze und Instrumente zum Abbau von Hemmnissen zu erarbeiten und Impulse für die handelnden Akteure sowie Entscheidungsträger für eine verbesserte Abfallvermeidung zu geben. Begleitet und unterstützt wird der Dialogprozess durch weitere flankierende Maßnahmen wie der Durchführung von Konferenzen, die der Sensibilisierung für Abfallvermeidungsthemen sowie dem Erfahrungsaustausch und der Vernetzung dienen. Ein weiteres wichtiges Element sind Forschungsaktivitäten. So soll im Rahmen eines geplanten Projekts ein passendes Set an Indikatoren zur Erfolgskontrolle erarbeitet werden. Aufsetzend auf den Ergebnissen des Umsetzungsprozesses wird das Abfallvermeidungsprogramm 2019 erstmals auszuwerten und fortzuschreiben sein - gegebenenfalls unter Berücksichtigung neuer europäischer Vorgaben an die Abfallvermeidung.Quelle: http://www.muellundabfall.de
description: Against the background of the growing world population and natural resources becoming scarcer waste prevention has to be regarded as an important task for the future. The "Waste Prevention Programme of the German Government with the Involvement of the Federal LänderŁ was established in accordance with the waste framework directive. The programme addresses 34 measures. Thematic dialogues on certain groups of measure constitute a major focus of the implementation process. The aim is to develop approaches and instruments to remove barriers and to gain fresh impetus for the relevant actors and decision-makers. The dialogue process is accompanied and supported by ancillary measures such as the holding of conferences. The conferences aim at sensitising for waste prevention issues and serve the exchange of experience and networking purposes. Further important elements of the implementation process are research activities. Within the scope of a planned project a set of indicators for monitoring the success of waste prevention measures should be developed. Based on the results of the implementation process the waste prevention programme will have to be evaluated and revised for the first time in 2019 - in due consideration of new European requirements, if applicable.Quelle: http://www.muellundabfall.de
Realitätsnahe Berechnung des Energiebedarfs
Creators: name: Manteuffel, Bernhard Von
name: Offermann, Markus
Publisher: name: Umweltbundesamt
Year: 2022
Subjects: subject: Energieeffizienz
subject: Gebäude
subject: Energiebilanz
subject: Nutzerverhalten
subject: Raumtemperatur
subject: energieeffizient
subject: Klima | Energie

description: Das Kurzgutachten analysiert Ursachen für Abweichungen zwischen dem normativ rechnerisch ermittelten Energiebedarf und dem tatsächlich messbaren Energieverbrauch eines Gebäudes. Nach einer Beschreibung von Ursachen und Treibern dieser Abweichungen wird die verfügbare Literatur ausgewertet. Indikative Berechungen quantifizieren die Größenordnung dieser Abweichungen. Schließlich werden Empfehlungen für realitätsnähere Standard-Randbedingungen für die energetische Bilanzierung von Gebäuden gegeben. Quelle: www.umwletbundesamt.de
description: Das Kurzgutachten analysiert Ursachen für Abweichungen zwischen dem normativ rechnerisch ermittelten Energiebedarf und dem tatsächlich messbaren Energieverbrauch eines Gebäudes. Nach einer Beschreibung von Ursachen und Treibern dieser Abweichungen wird die verfügbare Literatur ausgewertet. Indikative Berechungen quantifizieren die Größenordnung dieser Abweichungen. Schließlich werden Empfehlungen für realitätsnähere Standard-Randbedingungen für die energetische Bilanzierung von Gebäuden gegeben.
Book selection behavior in the physical library: implications for ebook collections
Creators: name: Hinze, Annika
name: McKay, Dana
name: Vanderschantz, Nicholas
name: Timpany, Claire
name: Cunningham, Sally Jo
Publisher: name: Swinburne
Year: 2024

description: Little is known about how readers select books, whether they be print books or ebooks. In this paper we present a study of how people select physical books from academic library shelves. We use the insights gained into book selection behavior to make suggestions for the design of ebook-based digital libraries in order to better facilitate book selection behavior.
Supplementary document for Wavelet-based background and noise subtraction for fluorescence microscopy images - 5013322.pdf
Creators: name: Hüpfel, Manuel
name: Kobitski, Andrei
name: Zhang, Weichun
name: Nienhaus, Gerd
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Biophysics
Biological Techniques

description: Supplemental Document
Accurate positioning of a servo DC-motor using self adjusting-adaptive sliding model controller.
Creators: name: Shaban-Zanjani, Hamid.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1994
Subjects: subject: Applied Mechanics.

description: This study presents a strategy for position feedback control, a so-called self-adjusting adaptive sliding mode controller, to obtain a desired steady state error for a DC-motor servo in the presence of Coulomb friction and stiction. Sliding mode controllers are of the type of nonlinear controllers which have been studied extensively by Russian scientists, including V. I. Utkin and V. Itkis. The self adjusting sliding mode control method that this thesis is focused on is an adaptive discontinuous controller with an approximated sliding mode trajectory. The study is concerned with both analytical and experimental performances of such a class of control strategy and a PID (proportional integral and derivative) controller in the presence of dry friction for the purpose of comparison. The study also investigates the effect of nonlinear phenomenon such as torque saturation on the states of the variables of such a system. The result of the paper is finally based on the suitable performance of the suggested control methodology utilizing a new form of sliding mode controller for the second order class of systems, rather than the conventional forms from V. Itkis and V. I. Utkin.
Supplementary document for Wavelet-based background and noise subtraction for fluorescence microscopy images - 5013322.pdf
Creators: name: Hüpfel, Manuel
name: Kobitski, Andrei
name: Zhang, Weichun
name: Nienhaus, Gerd
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Biophysics
Biological Techniques

description: Supplemental Document
Studies on the survival and viability testing of Cryptosporidium parvum oocysts in the water environment.
Creators: name: Heisz, Marianne.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1997
Subjects: subject: Biology, Microbiology.

description: Concentrations of Cryptosporidium oocysts in source waters, especially surface sources, are of great concern to the drinking water supply industry. One of the objectives of this study was to assess if differences in water chemistry, biology or seasonal variations affect oocyst survival. Three watersheds, the Grand River, the St. Lawrence River, and the Carp River, all in Ontario, Canada, were selected to assess the survival of oocysts in waters with different geography. Water samples were collected from each river at two locations, one upstream from the urban district, the other at or downstream from the urban district. Water was sampled from each location within each watershed during different seasons of the year and seeded with $5\times10\sp5$ Cryptosporidium oocysts/mL. Synthetic hard water (100 ppm as CaCO$\sb3,$ pH 7.0) seeded with an equivalent number of oocysts served as the control for each experiment. Survival of seeded oocysts was determined by a standardized in vitro excystation assay combined with total oocyst counts; bacterial heterotrophic plate counts (HPC) at the start of each experiment were determined on R2A agar and counted after 5 days of incubation at room temperature. All water samples were sent to a commercial laboratory for chemical analysis. Water samples collected in the summer were incubated at 20$\sp\circ$C and 30$\sp\circ$C, winter water samples were incubated at 4$\sp\circ$C and 20$\sp\circ$C and spring water samples were also incubated at 4$\sp\circ$C and 20$\sp\circ$C. (Abstract shortened by UMI.)
CONDA-PM—a systematic review and framework for concept drift analysis in process mining
Creators: name: Elkhawaga, Ghada
name: Abuelkheir, Mervat
name: Barakat, Sherif I.
name: Riad, Alaa M.
name: Reichert, Manfred
Publisher: name: Universität Ulm
Year: 2020
Subjects: subject: concept drift analysis
subject: business process
subject: Process-Aware Information Systems
subject: systematic literature review
subject: DDC 000 / Computer science, information & general works
subject: DDC 600 / Technology (Applied sciences)
subject: Process mining

description: Business processes evolve over time to adapt to changing business environments. This requires continuous monitoring of business processes to gain insights into whether they conform to the intended design or deviate from it. The situation when a business process changes while being analysed is denoted as Concept Drift. Its analysis is concerned with studying how a business process changes, in terms of detecting and localising changes and studying the effects of the latter. Concept drift analysis is crucial to enable early detection and management of changes, that is, whether to promote a change to become part of an improved process, or to reject the change and make decisions to mitigate its effects. Despite its importance, there exists no comprehensive framework for analysing concept drift types, affected process perspectives, and granularity levels of a business process. This article proposes the CONcept Drift Analysis in Process Mining (CONDA-PM) framework describing phases and requirements of a concept drift analysis approach. CONDA-PM was derived from a Systematic Literature Review (SLR) of current approaches analysing concept drift. We apply the CONDA-PM framework on current approaches to concept drift analysis and evaluate their maturity. Applying CONDA-PM framework highlights areas where research is needed to complement existing efforts.
"Maricide" au Canada français (1867-1940) : le syndrome de la femme fatale.
Creators: name: Bernier, Joanne.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1995
Subjects: subject: History, Canadian.

description: Nous avons etudie les cas de femmes quebecoises condamnees a mort a la fin du XIXe et debut XXe siecle; notre objet etait de voir si le fait de deroger au modele de la femme de cette epoque a pu jouer sur les executions des femmes au Canada francais. Avant meme de se plonger dans l'analyse des proces, nous avons tout d'abord etudie le contexte social quebecois de la fin du XIXe siecle et milieu XXe siecle, plus particulierement la place de la femme quebecoise a cette epoque. Il en est ressorti que la femme avait deux principaux roles, celui de mere et celui d'epouse. La reproduction etait la mission de la creature feminine sur terre. La femme mariee avait ainsi pour role d'avoir des enfants et egalement de soulager les besoins de l'epoux. L'etude de nos proces nous amenait donc a rechercher les references faites par les hommes de loi, dans leurs allocutions, au modele de la femme quebecoise de l'epoque. Cette analyse nous a permis de constater que les discours des juges et avocats etaient bel et bien empreints de jugements de valeurs, et qu'ils mettaient en cause des faits reproches a ces femmes accusees qui n'etaient nullement relies au crime commis. Ces femmes furent accusees d'avoir ete de mauvaises epouses, des etres infideles ayant trahi leurs serments religieux envers leur epoux. Bon nombre d'entre elle se sont vues egalement reprocher le fait de ne pas avoir d'enfant ou de ne pas avoir ete de bonnes meres pour ceux-ci. Ces femmes ont ete jugees comme etant tout ce qu'une femme ne devait pas etre: desobeissantes, insoumises, infideles, indecentes, manipulatrices,$\...$ bref, elles etaient considerees comme des etres demoniaques qui n'avaient plus leur place dans la communaute. (Abstract shortened by UMI.)
Behavior of flax frp tube confined coir fibre reinforced concrete column: Bond effect
Creators: name: Yan, Libo
name: Chouw, Nawawi
Publisher: name: Swinburne
Year: 2024

description: This study investigated the effect of flax fibre reinforced polymer (FFRP) and concrete bond on the compressive behaviour of FFRP tube confined coir fibre reinforced concrete (CFRC). Two types of bond were considered, i.e. concrete confined by (i) FFRP tube and (ii) FFRP tube with internal holes. They were termed as naturally and mechanically bonded specimens, respectively. The test results indicated that the two FFRP confinements increased the ultimate strength and ductility of the concrete significantly compared to the unconfined concrete. It was found that the type of FFRP and concrete bond had a significant effect on the ultimate strength and axial strain of the confined cylinders. The naturally bonded composite cylinder offered a larger ultimate compressive strength compared with the mechanically bonded cylinder. In the cases of FFRP confined CFRC, the coir fibre inclusion reduced the numbers and widths of the cracks in the concrete compared with the FFRP tube confined plain concrete.
Vulnerability of Buildings with Flat Plates and Flat Slabs to Progressive Collapse
Creators: name: Zanjir, Ahmad Mohamed Rifat
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2012
Subjects: slab

description: The investigation of progressive collapse of buildings has been of special interests during the last decade. The aim of this study is to assess the influence of selected design parameters on the vulnerability of structures with flat plates or flat slabs to progressive collapse triggered by the severe damage or failure of a column as a result of accidental or maliciously intended terrorist activity. The variables of frames with two-way slab systems investigated include: the number of stories in buildings (low-, medium- and high-rise buildings), span ratio (the ratio of span lengths in two orthogonal directions), span length for square panels, as well as the effect of having flat plates compared to flat slabs detailed either as ordinary gravity load carrying systems or by following the seismic detailing requirements of the Canadian practice as per CSA A23.3-04. The linear-elastic static analysis method, outlined in the General Services Administration (GSA) guidelines of the US, was employed to conduct a parametric investigation to assess the significance of the design variables considered on progressive collapse potentials of buildings. This involved the computation of demand/capacity ratios (DCR) Higher DCRs were obtained for buildings with increased number of stories and span ratios, while the change in span lengths did not show a clear trend. Also, flat slabs were less vulnerable, and experienced smaller DCRs, than flat plates. Buildings detailed according to the seismic provisions of CSA A23.3-04 were less vulnerable than those detailed without these provisions. However, both slabs with non-seismic and seismic detailing required improvements in terms of the percentage of top and bottom reinforcement and bar lengths, depending on the slab type and the design parameters considered.
The many lives of active galactic nuclei: Cooling flows, black holes and the luminosities and colours of galaxies
Creators: name: Croton, Darren
name: Springel, Volker
name: White, Simon D.M.
name: De Lucia, G.
name: Frenk, C. S.
name: Gao, L.
name: Jenkins, A.
name: Kauffmann, G.
name: Navarro, J. F.
name: Yoshida, N.
Publisher: name: Swinburne
Year: 2024

description: We simulate the growth of galaxies and their central supermassive black holes by implementing a suite of semi-analytic models on the output of the Millennium Run, a very large simulation of the concordance Λ cold dark matter cosmogony. Our procedures follow the detailed assembly history of each object and are able to track the evolution of all galaxies more massive than the Small Magellanic Cloud throughout a volume comparable to that of large modern redshift surveys. In this first paper we supplement previous treatments of the growth and activity of central black holes with a new model for 'radio' feedback from those active galactic nuclei that lie at the centre of a quasi-static X-ray-emitting atmosphere in a galaxy group or cluster. We show that for energetically and observationally plausible parameters such a model can simultaneously explain: (i) the low observed mass drop-out rate in cooling flows; (ii) the exponential cut-off at the bright end of the galaxy luminosity function; and (iii) the fact that the most massive galaxies tend to be bulge-dominated systems in clusters and to contain systematically older stars than lower mass galaxies. This success occurs because static hot atmospheres form only in the most massive structures, and radio feedback (in contrast, for example, to supernova or starburst feedback) can suppress further cooling and star formation without itself requiring star formation. We discuss possible physical models that might explain the accretion rate scalings required for our phenomenological 'radio mode' model to be successful.
Modeling of bracing dampers in steel buildings under seismic loading
Creators: name: Al-Oukaili, N. K.
name: Al-Zaidee, S. R.
name: Al Mallah, N. M.
Publisher: name: Swinburne
Year: 2024

description: This paper focuses on modeling and effectiveness of the manufactured dampers when used in steel buildings. The concept is to protect the building from the damaging effects of earthquake by introducing a manufactured damper instead of the traditional bracing. Two types of manufacture dampers, namely Pure Manufactured Dampers and Viscoelastic Manufactured Dampers, have been considered in this paper. Structural characteristics of manufactured dampers (i.e., stiffness and damping) have been derived based on a macroscopic point of view. Where the stiffness is defined based on the slope of the diagonal line of the hysteretic loop and the damping is derived from the area of hysteretic loop of tested damper. This study has been using viscous model to simulate the behavior of Pure Manufactured Dampers and Viscoelastic Manufactured Dampers. Based on comparison of predicated behavior with analytical results, one can conclude that the viscous model simulate behavior of Viscoelastic Manufactured Dampers with larger accuracy if compared with Pure Manufactured Dampers. As damping of manufactured dampers is generally greater than the damping of traditional materials, then the resulting damping matrix for the whole structure could be classified as a nonclassical damping. Accuracy of the mode superposition method when applied to a structure with manufactured dampers has been checked. Where, approximated results of mode superposition method have been compared with the more accurate results of the direct integration method. It has been noted that the mode superposition method has different levels of accuracy depending on the relation between the fundamental frequency of structure and the dominate frequency of the earthmotion. Effectiveness of the above two types of manufactured dampers have also been assessed based on comparing them with traditional bracings. Different ratios of stiffness for manufactured dampers have been used during this assessment in order to separate the effects of stiffness from the effect of damping for the manufactured dampers. Effectiveness have also been assessed as a function of building height where it has been found that rate of efficiency of manufactured damper is inversely proportional with the height of building. Finally, effectiveness of the two damper types have been assessed for different earthmotion, where it has been found that the effectiveness depends on the relation between the fundamental frequency of the structure and the dominate frequency of the earthmotion.
Fehlertolerante Sicherheitsmechanismen für Aggregation in Fahrzeug-Fahrzeug-Netzen
Creators: name: Dietzel, Stefan
Publisher: name: Universität Ulm
Year: 2016
Subjects: subject: Fahrzeug-Fahrzeug-Netze
subject: DDC 004 / Data processing & computer science
subject: Vehicular ad hoc networks: Computer networks
subject: Aggregation
subject: Sicherheit
subject: VANET

description: Inter-vehicular networking, so-called VANET, is an active research topic. Possible applications include safety, driving-efficiency, and entertainment applications. Especially due to the safety relevance of applications, communication integrity needs to be protected. Usually this is done using cryptographic signatures on single outgoing messages. However, as bandwidth for VANET applications is very limited, often single messages cannot be used to disseminate information over larger areas, especially not if they are carrying cryptographic signatures. For many applications, however, it is not necessary to disseminate exact information. For a traffic information application, for instance, messages can be aggregated to contain average information about larger areas. Such aggregation poses a problem to the aforementioned integrity mechanisms. When all vehicles participate as equal peers of the aggregation process, attackers can easily generate false information about larger areas without being noticed. This is true even if signatures on the resulting aggregates are used. It is the goal of this Diplom thesis to discuss security mechanisms that can be applied even when using in-network data aggregation.
Innovative Techniken - Beste verfügbare Technik in ausgewählten Sektoren
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2016
Subjects: subject: Beste verfügbare Technik
subject: Emissionsminderung
subject: Stand der Technik
subject: Großfeuerungsanlagen
subject: Gasturbinen
subject: IED
subject: GFA
subject: Wirtschaft | Konsum
subject: Luft
subject: Economy | Consumption
subject: Air

description: Der vorliegende Bericht ist im Rahmen der Unterstützung der Revision des BVTMerkblattes "Großfeuerungsanlagen" auf nationaler Ebene entstanden. Er enthält die wesentlichen Ergebnisse der Datenerhebung an rund 50 deutschen Großfeuerungsanlagen. Zusätzlich ist eine erste Datenauswertung dargestellt. Wichtige Hin-weise für die weitere Datenbehandlung und Auswertung werden in Kapitel 2 und 5 gegeben. Um dem zunehmenden Thema der Kraftwerksflexibilität Rechnung zu tragen, wurden für jeweils eine steinkohlebefeuerte und eine GuD-Anlage eine Fallstudie für den Zusammenhang der Emissionen von der Last bzw. den An- und Abfahrvorgängen durchgeführt. Am Ende dieses Berichtes findet sich ein Entwurf für das Kapitel über Biomasse im zukünftigen BVT-Merkblatt.Quelle: http://www.umweltbundesamt.de
description: Der vorliegende Bericht ist im Rahmen der Unterstützung der Revision des BVTMerkblattes „Großfeuerungsanlagen“ auf nationaler Ebene entstanden. Er enthält die wesentlichen Ergebnisse der Datenerhebung an rund 50 deutschen Großfeuerungsanlagen. Zusätzlich ist eine erste Datenauswertung dargestellt. Wichtige Hin-weise für die weitere Datenbehandlung und Auswertung werden in Kapitel 2 und 5 gegeben. Um dem zunehmenden Thema der Kraftwerksflexibilität Rechnung zu tragen, wurden für jeweils eine steinkohlebefeuerte und eine GuD-Anlage eine Fallstudie für den Zusammenhang der Emissionen von der Last bzw. den An- und Abfahrvorgängen durchgeführt. Am Ende dieses Berichtes findet sich ein Entwurf für das Kapitel über ⁠Biomasse⁠ im zukünftigen BVT-Merkblatt.
Non-steriodal anti-inflammatory drug-mediated regulation of COX-2 and EP3 receptor expression in the M-1 murine cortical collecting duct cell line.
Creators: name: Ferguson, Shawn.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1999
Subjects: subject: Health Sciences, Pharmacology.

description: The cortical collecting duct (CCD) is a major site of intrarenal prostaglandin E2 (PGE2) synthesis. By indirect immunofluorescence using isoform specific antibodies, we have localized COX-1 and -2 immunoreactivity to all cell types of the murine M-1 CCD cell line. By, immunohistochemistry, both COX-1 and COX-2 were localized to the intercalated cells of the collecting duct on paraffin embedded mouse kidney sections. When COX enzyme activity was measured in the M-1 cells, both indomethacin (COX-1 and -2 inhibitor) and the specific COX-2 inhibitor NS-398 effectively blocked PGE2 synthesis. These results demonstrate that COX-2 is a major contributor to the pool of PGE2 synthesized by the CCD. PGE2 exerts predominantly diuretic and natriuretic effects upon the CCD. Our results which document the expression of COX-2 in the CCD provide a mechanism through which the newly developed class of COX-2 specific inhibitors could exert side effects with respect to the regulation of fluid and electrolyte homeostasis. (Abstract shortened by UMI.)
Chronically Elevated Corticosterone Levels, via Cocoa Butter Injections of Corticosterone, Do Not Affect Stress Response, Immune Function, and Body Condition in Free-living Painted Turtles (Chrysemys picta)
Creators: name: Juneau, Véronique
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2014
Subjects: Baseline
Blood parasite
Chelonian
Chronic stress
Corticosterone manipulation
Ectotherm
Glucocorticoid
Haemogregarina balli
Heterophil-to-lymphocyte ratio
Leukocyte count
Reptile
Silastic implant
Stress-induced

description: Chronic stress can result in elevated circulating levels of glucocorticoid hormones in vertebrates, which can affect their stress response, their immune function, and eventually their fitness. I tested the effect of chronic corticosterone (CORT) elevation on the acute stress responsiveness, immune function, and body condition of free-living painted turtles (Chrysemys picta) in Gatineau Park, using slow-release exogenous CORT administration. While Silastic implants did not predictably elevate circulating CORT concentrations in painted turtles, injections of CORT-laden cocoa butter kept circulating levels elevated for up to 3 weeks, to concentrations likely physiologically and ecologically relevant for the species. I measured the acute CORT stress response, parasitaemia, heterophil-to-lymphocyte ratios, and total leukocyte counts after 1 week and 3 weeks, and determined body condition after 1 week, 3 weeks, and 1 year. Compared to sham and control turtles, I observed no effect of treatment on these hormonal, immune, and body condition metrics of stress, possibly because CORT mediates resource allocation only in the presence of additional immune or energy challenges, because of the masking effect of extrinsic factors, or because free, not total, CORT appears to be biologically active.
Social assistance, equality, and section 15 of the Charter.
Creators: name: Fainer, Andrew.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1993
Subjects: subject: Law.

description: Prior to 1982 the Parliament of Canada and the legislatures of the provinces were the sovereign powers within their respective constitutional areas of legislative jurisdiction. In 1982, with the passage by the British Parliament of the Canada Act 1982, the Canadian Charter of Rights and Freedoms (hereinafter referred to as the "Charter") became part of the "supreme law of Canada". This thesis is composed of three distinct parts. The first part provides an overview of the Ontario social assistance system in its current state of transition. The second part consists of a response to the essential question of equality: what is the worth of a human being? A response to this question is sought within the framework of Western traditions. Based mostly upon a review of the literature and an analysis of the section 15 jurisprudence of the Supreme Court of Canada the third part consists of an evaluation of the likelihood of the courts interpreting section 15 of the Charter with regard to cases involving the social assistance system in a manner that is consistent with the conception of human worth and dignity developed in the first two parts of the thesis. It is proposed that the idea of equality requires a social assistance system to recognize the satisfaction of need which is outside the control of the individual, with need being understood to comprise the element of social participation, to be its goal and guiding principle. The underlying basis to this proposition is that equality is essentially a demand upon the human capacity to empathize. (Abstract shortened by UMI.)
Sodium biphenyl as anolyte for sodium–seawater batteries
Creators: name: Kim, Yongil
name: Jung, Jaeho
name: Yu, Hyein
name: Kim, Guk‐Tae
name: Jeong, Dasong
name: Bresser, Dominic
name: Kang, Seok Ju
name: Kim, Youngsik
name: Passerini, Stefano
Publisher: name: Universität Ulm
Year: 2020
Subjects: subject: liquid anodes
subject: seawater batteries
subject: sodium biphenyl
subject: sodium metal anodes
subject: DDC 540 / Chemistry & allied sciences
subject: Anolytes
subject: Natrium-Ionen-Akkumulator

description: Sodium biphenyl is investigated as an anolyte for sodium metal/seawater batteries. The sodium biphenyl anolyte enables an excellent capacity retention over 80 cycles in anode‐free seawater battery full‐cell configuration. This is because the sodium biphenyl behaves as a “mediator/ carrier” for sodium transport in the negative electrode compartment thanks to its simultaneous ionic and electronic conductivity. Sodium‐based battery systems have recently attracted increasing research interest due to the abundant resources employed. Among various material candidates for the negative electrode, sodium metal provides the highest capacity of theoretically 1165 mAh g−1 and a very low redox potential of −2.71 versus the standard hydrogen electrode. However, the high reactivity of sodium metal toward the commonly used electrolytes results in severe side reactions, including the evolution of gaseous decomposition products, and, in addition, the risk of dendritic sodium growth, potentially causing a disastrous short circuit of the cell. Herein, the use of sodium biphenyl (Na‐BP) as anolyte for the Na–seawater batteries (Na–SWB) is investigated. The catholyte for the open‐structured positive electrode is natural seawater with sodium cations dissolved therein. Remarkably, the significant electronic and ionic conductivities of the Na‐BP anolyte enable a low overpotential for the sodium deposition upon charge, allowing for high capacity and excellent capacity retention for 80 cycles in full Na–SWB. Additionally, the Na‐BP anolyte suppresses gas evolution and dendrite growth by forming a homogeneous surface layer on the metallic negative electrode.
The electronic structural and defect-induced absorption properties of a Ca2B10O14F6 crystal
Creators: name: Wang, Xuejiao
name: Xu, Benyan
name: Wang, Kunpeng
name: Li, Zhenyou
name: Zhang, Jianxiu
name: Liang, Lanju
name: Li, Longfei
name: Ren, Yanbiao
name: Liu, Yong
name: Liu, Meng
name: Xue, Dongfeng
Publisher: name: Universität Ulm
Year: 2021
Subjects: subject: non-linear optical materials
subject: Ca2B10O14F6 crystal
subject: ab initio calculation
subject: laser-induced damage
subject: 74.62.Dh
subject: 71.15.–m
subject: 81.10.–h
subject: DDC 530 / Physics
subject: Optical materials
subject: Optischer Werkstoff

description: Comprehensive ab initio electronic structure calculations were performed for a newly developed deep-ultraviolet (DUV) non-linear optical (NLO) crystal Ca2B10O14F6 (CBOF) using the first principle method. Fifteen point defects including interstitial, vacancy, antisite, Frenkel, and Schottky of Ca, O, F, and B atoms in CBOF were thoroughly investigated as well as their effects on the optical absorption properties. Their formation energies and the equilibrium concentrations were also calculated by ab initio total energy calculations. The growth morphology was quantitatively analyzed using the Hartman–Perdok approach. The formation energy of interstitial F (Fi) and antisite defect OF were calculated to be approximately 0.33 eV and 0.83 eV, suggesting that they might be the dominant defects in the CBOF material. The absorption centers might be induced by the O and F vacancies (VF, VO), interstitial B and O (Oi, Bi), and the antisite defect O substitute of F (OF), which might be responsible for lowering the damage threshold of CBOF. The ionic conductivity might be increased by the Ca vacancy (Vca), and, therefore, the laser-induced damage threshold decreases.
Supplementary document for Manipulation of quantum dot emission with semiconductor metasurfaces exhibiting magnetic quadrupole resonances - 5013425.pdf
Creators: name: Vaskin, Aleksandr
name: Liu, Sheng
name: Addamane, Sadhvikas
name: Vabishchevich, Polina
name: Zilk, Matthias
name: Yang, Yuanmu
name: Balakrishnan, Ganesh
name: Sinclair, Michael
name: Pertsch, Thomas
name: Brener, Igal
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Uncategorized

description: Supporting Information
title: Room‐temperature bulk plasticity and tunable dislocation densities in KTaO₃
Creators: name: Fang, Xufei
name: Zhang, Jiawen
name: Frisch, Alexander
name: Preuß, Oliver
name: Okafor, Chukwudalu
name: Setvin, Martin
name: Lu, Wenjun
Publisher: name: Wiley-Blackwell
Year: 2024

description: We report room‐temperature bulk plasticity mediated by dislocations in single‐crystal cubic potassium tantalate oxide (KTaO₃), contrasting the conventional knowledge that single‐crystal KTaO₃ is susceptible to brittle fracture. A mechanics‐based combinatorial experimental approach using cyclic Brinell indentation, scratching, and uniaxial bulk compression consistently demonstrates room‐temperature dislocation plasticity in KTaO₃ from the mesoscale to the macroscale. This approach also delivers tunable dislocation densities and plastic zone size. Scanning transmission electron microscopy analysis underpins the activated slip system to be <110> {11¯0}. Given the growing significance of KTaO₃ as an emerging electronic oxide and the increasing interest in dislocations for tuning the physical properties of oxides, our findings are expected to trigger synergistic research interest in KTaO₃ with tunable dislocation densities.
The effect of modulating ATP-sensitive potassium channels in frog skeletal muscle, in vitro, during fatigue and metabolic inhibition.
Creators: name: Gramolini, Anthony Orlando.
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 1996
Subjects: subject: Biology, Animal Physiology.

description: The ATP-sensitive potassium (K$\sp+\rm\sb{(ATP)}$) channel is a K$\sp+$ channel which is activated as the energy state of a muscle decreases. It has been hypothesized that once activated, K$\sp+\rm\sb{(ATP)}$ channels decrease the excitability of the cell and cause decreased contractility, such as during fatigue, in order to prevent energy levels from falling to dangerously low levels. The purpose of this study was to test this hypothesis and to determine under which conditions K$\sp+\rm\sb{(ATP)}$ channels can contribute to a decrease in force during a metabolic stress in the sartorius muscle of the frog, Rana pipiens. In the first series of experiments, sartorius muscle fibres were fatigued with 100 msec long tetanic contractions every second for three minutes, a condition known to activate ATP-sensitive potassium channels. So if K$\sp+\rm\sb{(ATP)}$ channels contribute to a decrease in force during fatigue, an activation of K$\sp+\rm\sb{(ATP)}$ channels with channel openers should further decrease membrane excitability and contractility. In a second series of experiments, muscles were subjected to metabolic inhibition which is known to activate a large number of K$\sp+\rm\sb{(ATP)}$ channels in order to better understand the relationship between K$\sp+\rm\sb{(ATP)}$ channel activity, the bioenergetic state, and force. The goal was to determine if K$\sp+\rm\sb{(ATP)}$ channels can contribute to a decrease in force under a bioenergetic state that is within physiological limits. (Abstract shortened by UMI.)