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Untersuchung der Patientenzufriedenheit nach abdominaler SchnittentbindungHoffmann, Franziska 18 February 2013 (has links)
Objective:
We aimed to analyze the birth experience of women with caesarean section (CS) and the influence of clarification. Furthermore weaknesses of care from women’s view should be determined.
Method:
Online survey of women who had at least one CS
Results:
We analyzed data of 383 women. 47,8% women had a primary, 52,2% a secondary CS .
The birth experience ranged from wonderful (13,3%) to gruesome (25,1%). There were significant more women with secondary CS whose birth experience was associated with negative emotions.
Regarded in hindsight for 29,0% the CS was better than expected and 39,6% stated it had been worse than assumed.
Almost half of participants stated having coped (rather) bad with the CS and its concomitants. The opportunity of psychological consultation in hospital or at least addresses to contact when needed were repeatedly required.
In this survey the birth experience as well as the meeting of expectations toward CS depended on the satisfaction with the antenatal discussion by obstetricians and the clarification by medical staff while for antenatal classes no significant influence could be proved.
Conclusions:
A substantial amount of women had a negative birth experience. More effort concerning clarification and patient-centered care is required.
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Convolution type operators on cones and asymptotic spectral theoryMascarenhas, Helena 23 January 2004 (has links)
Die Arbeit beschäftigt sich mit Faltungsoperatoren auf Kegeln, die in Lebesgueräumen L^p(R^2) (1<p<\infty) von Funktionen auf der Ebene wirken.
Es werden asymptotische Spektraleigenschaften der zugehörigen Finite Sections studiert. Im Falle p=2 (Hilbertraum) wird das Invertierbarkeitsproblem von Operatoren vom Faltungstyp auf Kegeln mit Hilfe der Methode der Standard-Modell-Algebren untersucht.
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Měření vlastností top kvarku / Measurement of the top quark propertiesSchovancová, Jaroslava January 2016 (has links)
Title: Measurement of the top quark properties Author: Mgr. Jaroslava Schovancová Department: Institute of Physics, Academy of Sciences of the Czech Re- public Supervisor: RNDr. Jiří Chudoba, Ph.D., Institute of Physics, Academy of Sciences of the Czech Republic Abstract: This Thesis presents the ATLAS experiment measurement of the top quark differential cross-section as a function of pT, mass and rapidity of the t¯t system. A sample of approx. 4.7 fb−1 of the 2011 pp collision data at the center-of-mass energy of 7 TeV was analyzed. The differential spectra shapes in the t¯t system are consistent with the Standard Model and reason- ably described by the event generators. Several activities in the scope of ATLAS Distributed Computing are pre- sented, particularly in the area of operations, monitoring, automation, and development of the PanDA Workload Management System. Such activities aim to improve efficiency and facilitate the use of distributed computing re- sources and therefore contribute in supporting the ATLAS Physics Program. Keywords: ATLAS, top quark, differential cross-section, missing transverse energy, ATLAS Distributed Computing
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Spolupráce občanského sektoru a veřejné sféry ve vybrané lokalitě - ORP Železný Brod / The cooperation of the civil sector and the public sphere in the selected area - ORP Železný BrodHoráková, Silvie January 2017 (has links)
The aim of this thesis is to find out if there is cooperation between civil sector and public sector in chosen locality - Železný Brod. It is target on poverty and social exclusion. This cooperation will be assessed from the perspective of chosen respondents. The theoretical part describes some models of cooperation, situation in Czech Republic, importance of nonprofit organizations focused on social services and health care. Empirical part deals with methods and techniques of data collections, data analysis techniques. Next there is justification of location and target group. In the part Results, there are presented the results of analysis examined localities and respondents' statements. There is also answer the research questions. Key words: nonprofit organizations, public section, cooperation, partnership, poverty social exclusion
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Cross section measurements on 61Cu for proton beam monitoring above 20 MeVKuhn, S., Buchholz, M., Wels, T., Breunig, K., Scholten, B., Spahn, I., Coenen, H. H. January 2015 (has links)
Introduction
All experimental studies involving charged particle induced nuclear reactions require a precise knowledge of monitor reactions. A number of well described proton induced monitor reactions exist in the lower energy range [1], which is covered by most medical cyclotrons. Concerning proton energies above 20 MeV, however, the accuracy of the monitor reactions declines as cross section data becomes scarcer. Furthermore, the growing interest in precise determination of projectile energies by comparing of ratios of monitor reaction cross sections demands new measurements and evaluations of known data for high threshold monitor radionuclides.
In this work cross section measurements on the formation of 61Cu were done and energy de-pendent radionuclide ratios were calculated.
Material and Methods
For investigation of the natCu(p,x)61Cu reaction copper foils of natural isotopic composition (Goodfellow Ltd.) were irradiated. The targets were of 10 and 20 μm thickness, having a diameter of 15 mm.
Proton bombardments up to 45 MeV incident energy were done in the stacked-foil arrangement at the accelerator JULIC of the Nuclear Physics Institute (IKP) of the Forschungszentrum Jülich. In addition to an internal irradiation possibility the cyclotron is equipped with an external target station which was used for most experiments. It can adapt standard and slanting solid target holders and is equipped with a water cooled four sector collimator and additional helium cooling of the entry foil.
Several irradiations were executed. In each stack, besides copper samples, aluminium absorbers and additional nickel monitor foils were also placed, the latter for the determination of the respective beam current.
The produced radioactivity of 61Cu was analysed non-destructively using HPGe γ-ray detectors (EG&G Ortec).
Results and Conclusion
Reaction cross sections of the natCu(p,x)61Cu process up to 45 MeV were measured and com-pared with existing data from the literature (FIG. 2). Except for the data of Williams et al. our results are in good agreement, showing a maxi-mum of about 165 mbarn at 37.5 MeV proton energy. The overall uncertainty of the new cross section data is between 8 and 10 %.
In FIG. 3, the excitation functions of the relevant monitor reactions on Cu are shown.
In combination with the excitation function of the natCu(p,xn)62Zn reaction, isotope ratios were calculated which can be used for determination of the proton energy within a target stack in the energy range of 22–40 MeV as described by Piel et al. [3]. FIGURE 4 shows the cross section ratio in dependence of the proton energy.
Above this energy, 65Zn could be used to generate isotope ratios for energy determination, although the long half-life (T½ = 244.3 d) of that radionuclide may be a problem.
Additional cross section measurements are planned in order to further strengthen the data base of this potential monitor reaction. The results of this work shall be evaluated in the framework of an ongoing Coordinated Research Project of the IAEA.
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Improving Biometric Log Detection with Partitioning and Filtering of the Search SpaceRajabli, Nijat January 2021 (has links)
Tracking of tree logs from a harvesting site to its processing site is a legal requirement for timber-based industries for social and economic reasons. Biometric tree log detection systems use images of the tree logs to track the logs by checking whether a given log image matches any of the logs registered in the system. However, as the number of registered tree logs in the database increases, the number of pairwise comparisons, and consequently the search time increase proportionally. Growing search space degrades the accuracy and the response time of matching queries and slows down the tracking process, costing time and resources. This work introduces database filtering and partitioning approaches based on discriminative log-end features to reduce the search space of the biometric log identification algorithms. In this study, 252 unique log images are used to train and test models for extracting features from the log images and to filter and cluster a database of logs. Experiments are carried out to show the end-to-end accuracy and speed-up impact of the individual approaches as well as the combinations thereof. The findings of this study indicate that the proposed approaches are suited for speeding-up tree log identification systems and highlight further opportunities in this field
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Geometry Dependent Optimal Bounds of Absorption and Scattering Cross-section for Small NanoparticlesKhan, Md Shabbir Hossain January 2022 (has links)
Light-matter interaction in particles of subwavelength size mostly depends on the size, shape, composition of the particles and relies on the properties of incident light. Henceforth, resonant behavior of light can be effectively controlled by changing the aforesaid geometrical parameters. The aim of this study is to investigate the effect of size, shape, and material property dependency on the optimal bounds of scattering and absorption cross-section of nanoparticles. Mie theory is used here to solve Maxwell’s equations of light scattering from nanoparticles of different shape to calculate both scattering and absorption cross-sections of silicon and gold nanoparticles. In this work, numerical analysis based on Finite-Difference Time-Domain (FDTD) method is performed to study the optical properties of different size and shapes of silicon and gold nanoparticles such as sphere, pyramid, ring, and cubical structures. In particular, this study reveals how the resonant behaviour (magnitude and peak position) of light varies in accordance with the change in size, shape and material of a specific particle structured in nanoscale. In conclusion, we can quantify the efficiency of a small absorbing or scattering medium and propose structures suitable for implementation in inverse design applications.
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Behaviour and design of direct-formed hollow structural section membersTayyebi, Kamran 06 July 2021 (has links)
In North America, cold-formed square and rectangular hollow sections (collectively referred to as RHS hereinafter) of commonly specified cross-sectional dimensions are produced using either the indirect-forming approach or the direct-forming approach. The indirect-forming approach, as the conventional approach of the two, consists of three steps: (i) roll-forming the coil material progressively into a circular hollow section; (ii) closing the section using electric resistance welding (ERW); and (iii) reshaping the circular section into the final square or rectangular shape. On the other hand, the direct-forming approach, as the new approach of the two, roll-forms the coil material directly into the final square or rectangular shape.
RHS with similar cross-sectional dimensions but different production histories (i.e., different cold-forming approaches and post-production treatments) are expected to have significantly different material and residual stress properties. However, RHS design provisions in the existing North American steel design standards (AISC 360-16 and CSA S16-19) are in general developed based on research on indirect-formed RHS and currently do not differentiate RHS cold-formed by different approaches. Based on the research presented in Chapter 1 of this thesis, comparing to indirect-formed RHS, direct-formed RHS in general contain lower levels of residual stresses around cross sections, since the flat faces are not severely cold worked during production. This in turn affects member behaviours under compressive and flexural loadings. The test results presented in Chapters 2 and 4 show that direct-formed RHS have superior stub column and beam behaviours, comparing to their indirect-formed counterparts. In particular, the stub column and beam testing programs, covering a wide range of cross-section dimensions and two strength grades (nominal yield stresses of 350 and 690 MPa), show that the slenderness limits in the existing North American steel design standards are excessively conservative for direct-formed RHS, resulting in unnecessary penalty and member strength underestimation. As a result, the existing design formulae are not suitable for direct-formed RHS. In response to this, subsequent finite element (FE) parametric investigations are performed and presented in Chapters 3 and 5. Modified stub column and beam design recommendations for direct-formed regular- and high-strength RHS are proposed.
The effects of post-cold-forming hot-dip galvanizing on material properties, residual stresses, stub column behaviours and beam behaviours of direct-formed regular- and high-strength RHS are also studied in Chapters 1-5 of this thesis. Similar to the application of the heat treatment per ASTM A1085 Supplement S1 or the Class H finish per CSA G40.20/G40.21, post-cold-forming galvanizing improves the stub column (Chapter 2) and beam (Chapter 4) behaviours of direct-formed RHS via effective reduction of residual stresses (Chapter 1). Based on subsequent FE parametric investigations, modified stub column and beam design recommendations catering to galvanized direct-formed RHS are proposed in Chapters 3 and 5. / Graduate
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‚Jiné světy' žen Jazzové sekce v období tzv. normalizace / ‚Other worlds' of female members of Jazz section of the Musicians' Union in the normalization periodHynková, Martina January 2012 (has links)
MARTINA HYNKOVÁ: ‚JINÉ SVĚTY' ŽEN JAZZOVÉ SEKCE V OBDOBÍ TZV. NORMALIZACE ABSTRACT This master thesis deals with the Jazz section of the Musicians' Union in the normalization period. It was an amateur organization which existed from 1971 until 1986. It took an active part in the area of jazz and united an extensive jazz community. The thesis aims at gender aspects of female Jazz section's activities and roles. The research question can be formulated as follows: Which strategies of living did female members of the Jazz section choose during the normalization? The thesis is based on a biographical method consisting of six interviews with former female members of the Jazz section. Those interviews were made via an episodic narrative interview. The author revealed the following strategies of living: accession to the Jazz section community, being an active member of the community, going abroad to visit cultural events, contact with dissent and living in two worlds. Making of these other worlds by female members of the Jazz section thus became strategies of living on their own.
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EFFECTS OF PACK-RUST CORROSION IN COMPRESSION BUILT-UP MEMBERS IN STEEL BRIDGESSeng Tong Ngann (12447882) 22 April 2022 (has links)
<p>Pack-rust corrosion is a type of corrosion that affects steel built-up members especially old bridges. It is a localized corrosion that happens in the crevice between two mating surfaces. Pack-rust corrosion does not only cause section loss like other types of corrosions, but also induces local distortion in the structural members that are not the intention of the original designs. This corrosion can change the behavior of the connection fixity and could also cause instability in the overall built-up members. The size of distortion and section loss were observed to behave linearly between the free edge and the first line of fasteners. As the distance is moving toward the free edge, the distortion in the members and section loss in the base material were observed to be maximum. Another important observation was that pack-rust corrosion does not grow beyond the fastener at the fastener’s line. </p>
<p>The literature revealed that there are no comprehensive experimental and analytical studies focused on the behavior and effect of pack-rust corrosion on the overall performance of built-up members and connections in compression. Therefore, this research studies the effects of pack-rust corrosion on the capacity of built-up compression members including but not limited to stiffness, yield strength, maximum capacity, and change in fastener force under applied load. This research was studied by performing large-scale experimental testing of flexural members with simulated pack rust. Pack-rust distortion was simulated by placing washers in the crevice between two plates and then the two plates were drawn together using high-strength fasteners. There were also members with real pack-rust corrosion damage from bridge components that used to be in service, and were tested in axial compression tests. </p>
<p>The experimental results were compared with hand calculation using conventional design equations. Finite element analysis was also studied to compare with the experimental results in order to calibrate future models, but it is not presented in this report. The findings of the experimental results of all the specimens show that pack-rust corrosion affects yield strength and maximum capacity of the member and minimally affects the member’s stiffness. Maximum load of the member affected by pack-rust corrosion can still be estimated conservatively using the conventional design equations with some modifications. There was no indication of significant increase in fastener force under applied load, so the likelihood of fastener failing in tension was very small as observed from this study. </p>
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