8,315 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
Hydraulic conductivity and osmotic reflection coefficient of canine parietal pleura in vivo
No full textReal time monitoring of progressive damage during loading of a simplified total hip stem construct using embedded acoustic emission sensors
No full textAcoustic emission (AE) is a non-destructive technique that is capable of passively monitoring failure of a construct with excellent temporal resolution. Previous investigations using AE to monitor the integrity of a total hip replacement (THR) have used surface mounted sensors; however, the AE signal attenuates as it travels through materials and across interfaces. This study proposes that directly embedded sensors within the femoral stem of the implant will reduce signal attenuation effects and eliminate potential complications and variability associated with fixing the sensor to the sample. Data was collected during in vitro testing of implanted constructs, and information from both embedded and externally mounted AE sensors was compared and corroborated by micro-Computed Tomography (micro-CT) images taken before and after testing. The results of this study indicate that the embedded sensors gave a closer corroboration to observed damage using micro-CT and were less affected by unwanted noise sources. This has significant implications for the use of AE in assessing the state of THR constructs in vitro and it is hypothesised that directly embedded AE sensors may provide the first steps towards an in vivo, cost effective, user friendly, non-destructive system capable of continuously monitoring the condition of the implanted construct
Detection of grinding temperatures using laser irradiation and acoustic emission sensing technique
No full textThis paper presents a new method for the detection of grinding thermal behaviours using a laser irradiation technique. Laser irradiation was initially undertaken in the Lumonics JK704 Nd: YAG laser machine under mimic grinding conditions. Temperature elevation was controlled using laser irradiation by varying the laser energy and laser irradiation time. The signatures of acoustic emission (AE) were recorded as pure thermally induced AE signals. A series of grinding experiments were conducted separately to identify different AE sources during grinding. An artificial neural network (ANN) had been trained to distinguish high and low temperatures using laser thermal AE data. This trained ANN was then used to classify burn and no burn in the grinding zone. The classification accuracy achieved 71% when grinding Inconel718 materials. The novelty of this work is reflected in that the laser irradiation induced thermal AE signals can represent grinding thermal behaviour and can be used for grinding burn detection
The Androgen Excess and PCOS Society criteria for the polycystic ovary syndrome: the complete task force report
No full textObjectiveTo review all available data and recommend a definition for polycystic ovary syndrome (PCOS) based on published peer-reviewed data, whether already in use or not, to guide clinical diagnosis and future research.DesignLiterature review and expert consensus.SettingProfessional society.PatientsNone.Intervention(s)None.Main outcome measure(s)A systematic review of the published peer-reviewed medical literature, by querying MEDLINE databases, to identify studies evaluating the epidemiology or phenotypic aspects of PCOS.Result(s)The Task Force drafted the initial report, following a consensus process via electronic communication, which was then reviewed and critiqued by the Androgen Excess and PCOS (AE-PCOS) Society AE-PCOS Board of Directors. No section was finalized until all members were satisfied with the contents, and minority opinions noted. Statements were not included that were not supported by peer-reviewed evidence.Conclusion(s)Based on the available data, it is the view of the AE-PCOS Society Task Force that PCOS should be defined by the presence of hyperandrogenism (clinical and/or biochemical), ovarian dysfunction (oligo-anovulation and/or polycystic ovaries), and the exclusion of related disorders. However, a minority considered the possibility that there may be forms of PCOS without overt evidence of hyperandrogenism, but recognized that more data are required before validating this supposition. Finally, the Task Force recognized and fully expects that the definition of this syndrome will evolve over time to incorporate new research findings.Ricardo Azziz, Enrico Carmina, Didier Dewailly, Evanthia Diamanti-Kandarakis, Héctor F. Escobar-Morreale, Walter Futterweit, Onno E. Janssen, Richard S. Legro, Robert J. Norman, Ann E. Taylor, and Selma F. Witchel (Task Force on the Phenotype of the Polycystic Ovary Syndrome of The Androgen Excess and PCOS Society
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
A Comparative Study of the Monitoring of a Self Aligning Spherical Journal using Surface Vibration, Airborne Sound and Acoustic Emission
No full textA Self aligning spherical journal bearing is a plain bearing which has spherical surface contact that can be applied in high power industrial machinery. This type of bearing can accommodate a misalignment problem. The journal bearing faults degrade machine performance, decrease life time service and cause unexpected failure which are dangerous for safety issues. Non-intrusive measurements such as surface vibration (SV), airborne sound (AS) and acoustic emission (AE) measurement are appropriate monitoring methods for early stage journal bearing fault in low, medium and high frequency. This paper focuses on the performance comparison using SV, AS and AE measurements in monitoring a self aligning spherical journal bearing for normal and faulty (scratch) conditions. It examines the signals in the time domain and frequency domain and identifies the frequency ranges for each measurement in which significant changes are observed. The results of SV, AS and AE experiments indicate that the spectrum can be used to detect the differences between normal and faulty bearing. The statistic parameter shows that RMS value and peak value for faulty bearing is higher than normal bearing
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
Acoustic emission monitoring and 3-D visualisation of polymerisation induced damage of acrylic polymer materials.
No full textTo improve the longevity of total hip replacements, techniques such as vacuum mixing have been developed to reduce the amount of porosity within the cement. However, data from the Swedish hip registry has demonstrated an increased risk of revision for vacuum-mixed cemented devices in the first 5 years postoperatively. Theoretical and experimental evidence suggests that stresses induced by cement shrinkage during polymerization alone are sufficient to induce cracking. However, very little evidence of preload cracking is available due to the limitations of current inspection methods. The present work combines two forms of nondestructive evaluation technique to assess the state of an acrylic-based polymer mantle both in real time during polymerization using the acoustic emission (AE) technique and immediately post polymerization using micro-computed tomography (CT). AE data enabled the location, type, and chronology of events to be obtained. The use of micro-CT in combination with a radiopaque dye-penetrant was shown to be an effective method for highlighting preload polymerization cracking and verified the findings of the AE data. The AE data indicated that the first signs of damage occurred 3-6 min after the peak temperature obtained during exotherm, confirming that thermal contraction rather than pure volumetric shrinkage is the dominant factor in preload damage initiation. The methodology developed in this study enables detailed information on the condition of a cement mantle to be obtained without the need for serial sectioning
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
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