133 research outputs found
Continuing airworthiness policy and application to flying crane aircraft
No full textThis project is part of a collaborative MSc training programme between the
Aviation Industries of China (AVIC) and Cranfield University, aiming at
enhancing the competitiveness of AVIC in both international and domestic
aviation market through applying continuing airworthiness policies in the whole
aircraft development process.
The arrangement of the research project is that all students start with a Group
Design Project which is based on the Flying Crane Project provided by AVIC.
Individual research projects will address some aspects of the Flying Crane
Project during the Group Design Project, and then further developed during the
period for individual projects. The aim of this research is to apply the
airworthiness requirements and the methodology of the Maintenance Steering
Group logic (MSG-3) in the Flying Crane Project. This is because that
maintenance is one of the key factors of Continuing Airworthiness, and MSG-3
logic is the most accepted and approved method to develop scheduled
maintenance for civil aircrafts.
The main objectives of this project include: (1) To investigate current Continuing
Airworthiness regulations, including European airworthiness requirements (as
the main regulation to comply with) and Chinese airworthiness regulations (as
an important reference and supplement to the research); (2) To investigate the
main analysis methodology of reliability and maintainability, including Damage
Tolerance and Failure Mode and Effect Analysis (FMEA); (3) To analyse the
data resulted from the Group Design Project using MSG-3 logic to produce a set
of Continuing Airworthiness instructions, for the operator and maintenance
organisation of the aircraft, from the design organization’s perspective; (4) To
develop Continuing Airworthiness instructions for airline operators to compose
maintenance programmes for Flying Crane aircrafts, including maintenance
tasks and intervals for the selected airframe systems and structural components;
and (5) To identify applicable maintenance organisations in China for Flying
Crane aircrafts in accordance with both European and Chinese airworthiness
requirements.
On completion of this research, two aspects of Continuing Airworthiness have
been investigated, including maintenance programme and maintenance
organization. With MSG-3 logic, the author developed the maintenance plan for
three structural components (fuselage skin panel, wing root joint, and
fin-fuselage attachment) and one airframe system (fuel system) based on results
from the Group Design Project. The author also investigated the Chinese
domestic aircraft maintenance companies, and selected suitable maintenance
organizations based on technical and economical criteria
Factors affecting Maillard induced gelation of protein-sugar systems
No full textSIGLEAvailable from British Library Document Supply Centre-DSC:DXN011666 / BLDSC - British Library Document Supply CentreGBUnited Kingdo
Factors affecting Maillard induced gelation of protein-sugar systems
No full textGelation due to the Maillard reaction took place when solutions containing a low level of bovine serum albumin were heated in the presence of carbonyl compounds. The Maillard reaction caused a change in colour, a decrease in the pH and induced gelation. These changes were dependent on the type and concentration of sugars or protein and on the heating conditions used. Reducing sugar and Maillard reaction products (e.g. glyoxal) affected these changes, yet their order of reactivity for browning and gelation were not necessarily the same. Loss of available lysine and arginine plus changes in the thio amino acids showed that these were implicated in the reaction.
The gelation kinetics (gelation time and development of storage modulus) were followed in real time using a Bohlin CS Rheometer at a temperature of 90 °C. These studies showed that the gels did not form at a specific pH, the pH being lower for samples where the more reactive carbonyl compounds were used. Measurement of the charge on the protein after the Maillard reaction showed an increased negative charge, hence causing a lowering in the protein's isoelectric point. This had the effect of changing the critical protein concentration necessary for gelation at any pH above the isoelectric point. This reasoning would also explain the low syneresis seen in the Maillard gels. Hydrodynamic studies on dilute solution showed that the protein molecules heated in the presence of xylose associated in an orderly manner despite having a low pH. The aggregates could be described as "stiff and rod like". The linkages holding *the aggregates together were mostly attributed to additional non-disulfide linkages resulting from the Maillard reaction. Similar types of crosslinks were formed in the Maillard gels heated at 90°C and were thought to have enhanced the gel strength. Extrusion of soya grits with reducing sugars did not form a retort-stable product. However, microwave heating of the extruded product was successful in producing a product that survived a typical canning process. This suggests that formation of crosslinks may be controlled to produce novel food products
Development of cosmos caudatus (Ulam Raja)-enriched beef burger.
No full textAn Ulam Raja Extract with the highest yield and showed a high ORAC value was prepared. This has been code-named "UREXl". UREXI has been added into beef burger and subjected to a frozen storage.The extract showed good protection ability against fat oxidation that was as
Good as a commercial green tea extract. Thus, it is possible to produce Cosmos caudatus (Ulam
Raja)-enriched beef burge
Setting up company processes within EASA POA certification in the field of quality management and supply chain management.
No full textThe thesis is about the certification of the Czech aircraft manufacturing company ellipse aero s.r.o. It focuses mainly on the area of supply chain management and quality management in order to obtain EASA POA certification. The practical part of the thesis is divided into three parts. In the first part, the author describes and analyses the current state of the company and its small production plant. In the second part he proposes a solution in the form of setting up company processes and applies it to the enterprise under study. The third part is mainly devoted to obtaining the certification itself.Práce se věnuje certifikaci letecké výroby výrobního podniku ellipse aero s.r.o. Zaměřuje se především na oblast supply chain managementu a quality managementu za účelem získání certifikace EASA POA. Praktická část práce je rozdělena do tří částí. V první části autor popisuje a analyzuje aktuální stav podniku a jeho malého výrobního závodu. V druhé části navrhne řešení v podobě nastavení firemních procesů a aplikuje ho na sledovaný podnik. Třetí fáze se věnuje především získávání certifikace samotné
Setting up company processes within EASA POA certification in the field of quality management and supply chain management.
No full textThe thesis is about the certification of the Czech aircraft manufacturing company ellipse aero s.r.o. It focuses mainly on the area of supply chain management and quality management in order to obtain EASA POA certification. The practical part of the thesis is divided into three parts. In the first part, the author describes and analyses the current state of the company and its small production plant. In the second part he proposes a solution in the form of setting up company processes and applies it to the enterprise under study. The third part is mainly devoted to obtaining the certification itself.Práce se věnuje certifikaci letecké výroby výrobního podniku ellipse aero s.r.o. Zaměřuje se především na oblast supply chain managementu a quality managementu za účelem získání certifikace EASA POA. Praktická část práce je rozdělena do tří částí. V první části autor popisuje a analyzuje aktuální stav podniku a jeho malého výrobního závodu. V druhé části navrhne řešení v podobě nastavení firemních procesů a aplikuje ho na sledovaný podnik. Třetí fáze se věnuje především získávání certifikace samotné
Reliability of Intergreen Interval Based on Combined Dilemma and Option Zones
No full textCurrently, the dilemma and option zones’ failures are independently used to analyze the intergreen interval at signalized intersections. Therefore, the present research work is initiated to integrate these failures. First, the dilemma and option zones are modelled using the first-order second-moment method. Then, game theory is used to model the association between the dilemma and option failures. The failure probabilities of the dilemma and option zones are evaluated for various traffic conditions using Monte-Carlo simulation considering the Nash equilibrium. Next, the overall system probability is analyzed, based on the combined dilemma and option failures, given different intergreen intervals, speeds, and coefficients of variation. Finally, the study proposes a methodology for identifying the intergreen interval to limit system failure. This would aid practitioners in designing traffic lights at intersections and keeping proper intergreen intervals to limit the dilemma and option failures.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.Transport and Plannin
Production of Nigella sativa Beverage Powder under Foam Mat Drying Using Egg Albumen as a Foaming Agent
No full textThe aim of this study was to determine the feasibility of producing Nigella sativa powder under a foam mat drying technique. A central, composite design of experiments was used to optimize the drying condition and compare the solubility, the antioxidant and mineral content of roasted Nigella sativa, and the foam mat dried Nigella sativa powder. Foams were prepared from Nigella sativa solution by adding different concentrations of egg albumen (2.5%, 8.75%, and 15% w/w) and methyl cellulose (0, 0.5% and 1% w/w), using whipping times of 2, 5, and 8 min. The drying temperature was set at 50–70 °C, with a foam thickness of 1, 2, and 3 mm. The optimum recorded conditions for the foaming process were 15% of egg albumen concentration, 0.69% of methyl cellulose concentration, and a whipping time of 8 min. Thus, the optimum conditions for the drying process were 60 °C, with 2 mm of foam thickness. The results showed that there were significant differences in DPPH inhibition, the total phenolic content, and mineral content, whereas no significant differences were recorded in the water solubility index between the roasted Nigella sativa and the foam mat dried Nigella sativa powder
Conceptual approach to community-involved, drone-assisted meteorite searching: strategy to find fusion-crusted meteorites
No full textMeteorites offer valuable insights into the composition of asteroids and geological processes contributing to planet formation inside the solar system. Their rapid retrieval after fireball sightings allows this science potential to be used. Finding new meteorites is notoriously difficult due to various complicating factors. A promising search strategy can involve the aerial vantage point of drones (aka: UAV, RPAS). However, drone regulations by the European Union Aviation Safety Agency (EASA) and complex zonation of airspace will impact flight operations, which makes drone-assisted searching in Europe more complex than in e.g. desert environments. Here we present the results of an interdisciplinary desk study, which aimed at proposing a conceptual framework for drone-assisted meteorite searching. We propose the development of an open-source detection and coordination tool to improve aerial assistance by drones during field searches. The design provides drone enthusiasts (referred to as ‘community drones’) and researchers with a platform to coordinate joint drone-based search operations. Image processing is envisioned to take place via a convolutional neural network pipeline, after which high-likelihood locations are identified and manually verified to recover a potential meteorite. This approach will require the development of multiple models to account for variations in soils and vegetation. The tool supports multi-drone coordination, providing path planning functionality and support for a broad range of (commercially) available drone models (e.g. DJI) and sensor types (e.g. RGB, thermal). Considering EASA drone regulations, the use of the DJI Mini 3 Pro is favoured as an accessible community drone. Follow-up research, implementing the proposed conceptual approach, should validate the design presented here and highlight practical areas of improvement.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.Planetary Exploratio
Modeling vehicle collision instincts over road midblock using deep learning
No full textThe present research aims to understand the safety over the midblock road sections and proposes a safety framework using the conventional Time to Collision (TTC) measure. In the present work, the safety framework underlines a supporting structure connecting the actions of the surrounding vehicles and assesses the collisions changes for a given subject vehicle. The Framework principally checks the likelihood of lateral overlap and the time gap between the subject vehicle and its surrounding vehicles. Later, for the trajectory data development, an automated trajectory data development tool is built with the help of image processing for generating the trajectory data from the study sections. In supporting the developed safety framework, the lateral movement of the vehicles is modeled precisely with the help of deep learning. Further, the conceptualized safety framework is tested with the developed trajectory data sets over the study sections. From the results, it is observed that, in mixed traffic, the collision points are over the entire geometry of the study section. In the case of homogeneous traffic, the collision instincts are clustered toward the median lanes. With the advancement of technology, trajectory data development can be a real-time exercise, and the safety framework can be implemented. By applying the study methodology, the critical spots over the road network can be flagged for better treatment and improve safety over the sections.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.Transport and Plannin
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