3,772 research outputs found
aE Journal 2015/2016: aE/INTECTURE innovating architecture
No full textThe graduation studio of Architectural Engineering focuses on the integration of (new) technology in architecture. For this purpose, the name aE/ INTECTURE® was devised, which will be developed further as a brand in the coming years. Students start with a technical fascination and translate this into an architectural concept, finally being able to implement this within the environment in a responsible way. ‘If technology is the answer, what is the question?‘ Under the guidance of a team of enthusiastic (guest) lecturers, students search for the dot on the horizon that is necessary for coming up with solutions that improve the quality of the built environment and make it more sustainable. In addition, either the ‘making‘ (make) or ‘the energy and material flow’ (flow) is used and applied as a basis in different contexts.Architectural Engineerin
aE Journal 2017/2018: aE/Intecture innovating architecture
No full textDriven by the need to think differently about resources, energy, power generation, the choice of materials, and user involvement, we see the built environment in a new perspective. The program, Architectural Engineering, seeks for innovative and inspiring architectural solutions for social and environmental issues throughout all scales.To achieve this, innovation of the architectural challenge is high on our agenda. Innovation is more than just a technical improvement. How do you implement new current issues in modern architecture? We anticipate new energy, materials, and circularity. We also use the current environment of the metropolis and the countryside. We add new buildings, strengthen existing stock, and work on new components of buildings. From high to low tech. From digital to traditional, looking carefully to the context.Architectural Engineerin
Main motifs in the prose of the leftist author Kang Kyŏng-ae
No full textThe subject of this bachelor thesis is the life and work of the Korean writer Kang Kyǒng-ae, with a focus on her short prose. The aim of this thesis is an analysis of two works - Salt and Darkness - with attention to the context of the author's time. Nowadays, Kang Kyǒng-ae is considered a significant author of the 1930s and her works reflect the phenomenon of Korean emigrants in Manchuria. For a long time, leftist tendencies caused her prose to be neglected, which resulted in a considerably limited number of studies concerned with her work, in comparison to the number of studies about other writers. There are virtually no Czech studies of her work. The text of the thesis initially presents the timeframe of Kang's authorship and then analyzes select works of hers. The analysis of the works focuses on recurring motifs, which are put into a historical and social context. Keywords Kang Kyǒng-ae, Korean 1930s literature, leftist literature, Sogǔm, Ǒdu
Clinical pharmacology of topiramate in migraine prophylaxis: efficacy and safety
No full textTopiramate is generally considered to be safe and well tolerated in migraine treatment. The most common AE, which appeared with a frequency at least of 5% in controlled clinical trials on topiramate in migraine prophylaxis, were paresthesia, fatigue, anorexia, nausea, upper respiratory tract infection, diarrhoea, dizziness, difficulty with memory, language problems, difficulty with concentration and attention. The majority of AE were mild to moderate in severity and were most common during titration period rather than maintenance phase of the treatment. The incidence of AE leading to suspension of topiramate or to a dose reduction appeared to be dose-dependent. The most common were paresthesia (7%), fatigue (4%), nausea (4%), difficulty with concentration/attention (3%), insomnia (3%), anorexia (2%) and dizziness (2%) [Adelman 2008]. Paresthesia, usually tingling of the extremities, occurred with a frequency of 50% in the migraine patients treated with topiramate 100 mg/day but led to treatment discontinuation only in 8% of patients. Peripheral carbonic anhydrase inhibition by topiramate is thought to underlie the occurrence of paresthesia. Migraine patients seem exceptionally susceptible to paresthesia compared with patients with other diseases [Luxic]. However, it has been suggested that the development of paresthesia could predict a favorable response to topiramate in migraine prophylaxis [Lee 2007]
Development and Application of a Complete Common-Rail Injection System Mathematical Model for Hydrodynamic Analysis and Diagnostics
No full textA rather complete mathematical model for a Common Rail injection-system dynamics numerical simulation was developed to support experimentation, layout and control design, as well as performance optimization. The thermo-fluid dynamics of the hydraulic system components, including rail, connecting pipes and injectors was modeled in conjunction with the solenoid-circuit electromagnetics and the mechanics of mobile elements. Onedimensional flow equations in conservation form were used to simulate wave propagation phenomena throughout the high-pressure connecting pipes, including the feeding pipe of the injector nozzle. In order to simulate the temperature variations due to the fuel compressibility, the energy equation was used in addition to mass conservation and momentum balance equations. Besides, the possible cavitation phenomena effects on the mass flow rate through the injector bleed orifice and the nozzle holes were taken into account. A simple model of the electromagnetic driving circuit was used to predict the temporal distribution of the force acting on the pilot-valve anchor. It was based on the experimental time-histories of the current through the solenoid and of the associated voltage that is provided by the electronic control unit (ECU) to the solenoid valve. The numerical code was validated through the comparison of the prediction results with experimental data, that is, pressure, injected flow rate and needle lift time-histories, taken on a high performance test bench Moehwald-Bosch MEP2000-CA4000. The novel injection-system mathematical model was applied to the analysis of transient flows through the hydraulic circuit of a commercial multijet second-generation Common Rail system, paying specific attention to the wave propagation phenomena, to their dependence on solenoid energizing time and rail pressure, as well as to their effects on system performance. An insight was also given into the model capability of accurately predicting the wave dynamics effects on the rate and mass of fuel injected when the dwell time between two consecutive injections is varied
Biographical Romance, or The Wonders of ihe Life of An Émigrée of Choice: Fryderyk Járosy (1889–1960) – the Author of Unwritten Memoirs of Life Among the Polish Diaspora in London
No full textEnglish version. Original issue: “Archiwum Emigracji” 2009, no. 1 (10)https://apcz.umk.pl/AE/article/view/AE.2009.01
Autour du Nepos d'Alburnus, Maior, Panes, fils de Bizo (AE, 20081167=AE, 2007, 1201) : petit-fils ou neveu
No full textInternational audienceIn this article, the author studies again the inscription on a stone of a nepos from Alburnus Maior: Panes, son of Bizo (AE, 2008, 1167 = AE,2007, 1201). If the word nepos very often means « grandson », there are cases where it means « nephew ». The author pays special attention to the Latin kinship terminology in this inscription because names and lines are not Roman but peregrine. So, there is ambiguity as we cannot exactly know the relations between all these names. Now, between a grandfather and his grandson or an uncle and his nephew, there is the same number of generations. It is necessary for one to compare these to other inscriptions and words in addition to nepos (auia, auus, nurus, gener, pater, mater) or only with nepos in Rhenodanubian provinces (Raetia, Pannoniae, Moesiae, Dacia): these 67 inscriptions are in an appendix.The author concludes that the these two possibilities exist here
Performance evaluation of the Fiber Bragg Grating (FBG) sensing device and comparison with piezoelectric sensors for AE detection
No full textIn-service structural health monitoring (SHM) of engineering structures has assumed a significant role in assessing their safety and integrity. As the most mature technique in fiber-optic field, Fiber Bragg Grating (FBG) sensors have emerged as a reliable, in situ and nondestructive tool for monitoring and diagnostics in large-scale structure. Main objectives of this work are to evaluate and compare the acoustic emission (AE) sensing characteristics simultaneously with FBG sensor array and piezoelectric (PZ) sensors. The pencil-lead-break (PLB) test, ball dropping test and the excitation from the PZ transducer are treated as the AE source which conducted on the platy and blocky structure respectively for acoustic wave. The source repeatability will be verified to choose the source with more stable performance. A commercial 4-channel FBG AE detection device was used to compare with the PZ sensor on the amplitude and frequency response which can indicate the sensitivity of the sensors. The low sensitivity and low sampling rate are the main issue for the engineering application of the FBG sensors. Besides, the sensitivity and directional dependence of the FBG sensor have been discussed. It shows that the encapsulation method of the FBG sensor will impact both of them significantly.</p
Acoustic Emission as a Structural Health Monitoring (SHM) method for stay cables: Research into the possibilities of AE for stay cables of cable stayed bridges
No full textThe stay cables of the north bridge of the Galecopperbrug are reaching the end of their life span. Rijkswaterstaat, which is responsible for the bridges, needs a reliable Structural Health Monitoring (SHM) method to monitor the current state of the stay cables. At the moment, Rijkswaterstaat experiences issues with defining the state and the residual life span of the stay cables of the Galecopperbrug. This study focuses on the technique of Acoustic Emission (AE) for monitoring the stay cables of the Galecopperbrug. The main research question of this study was: “Is the AE-system used in a fracture-based assessment suitable for structural health monitoring of the stay cables of the Galecopperbrug?”. In this study the following methods were used to investigate the AE behaviour of stay cables: a literature study on previous research and the current knowledge of AE and the structural behaviour of cables was done, a full-scale and two verification experiments were performed to investigate the AE behaviour related to wire breaks and to investigate the accuracy of linear source location techniques, an analytical model of the stay cables was made to investigate the influence of different parameters to the capacity of the stay cables and to predict the stress distribution in the wires during the experiment and finally, a SCIA model of the Galecopperbrug was used to investigate the load bearing distribution of the Galecopperbrug. In this study, it was found that wire breaks inside (stay) cables will generate elastic stress waves which can be captured and recorded by AE sensors. Based on an experiment where multiple wire breaks occurred, it was shown that wire breaks can be identified with the help of AE techniques. However, the identification of wire breaks is mainly depending on the correct choice of sensor type. Based on the experiments and assumptions that were made in this study the R6I-AST type of sensors are more suitable for wire break detection and the R3I-AST sensors are more suitable for AE signals due to impacts. Based on the assumptions and the experiments performed in this study it can be concluded that AE can be used in a fracture-based assessment for SHM of the stay cables of the Galecopperbrug.Civil Engineering | Structural Engineerin
Acoustic Emission-based crack tracking for existing concrete structures: Influence of number of load cycles and loading speed
No full textAcoustic Emission (AE)-based crack tracking is a promising approach to locate cracks in concrete structures. Different from conventional AE, this approach uses AE activities during crack closure. But, AE activities during crack closure may be influenced by the number of load cycles and loading speed. This may challenge the applicability of AE-based crack tracking, especially for existing concrete structures with many load cycles in the service life. This paper investigates the influence of the number of load cycles and loading speed on AE-based crack tracking. A total of 80 load cycles were applied on a pre-cracked concrete beam. The last 5 cycles had increasing loading speeds. AE-based crack tracking was carried out in each load cycle. For calibration, Digital Image Correlation (DIC) was performed to measure the crack opening and closure. We found that AE-based crack tracking can locate the cracks, while, with many load cycles, it cannot indicate the crack width. Loading speed had little influence on AE-based crack tracking. The results of this paper put forward the applicability of AE-based crack tracking for existing concrete structures.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Concrete Structure
- …
