Gotowe bibliografie tematyczne / Aluminium Beads

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Gotowa bibliografia na temat „Aluminium Beads”

Autor: Grafiati
Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Aluminium Beads"

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Bansal, Abanesh kumar, i Vishal Pande. "Development and Evaluation of Dual Cross-Linked Pulsatile Beads for Chronotherapy of Rheumatoid Arthritis". Journal of Pharmaceutics 2013 (18.12.2013): 1–8. http://dx.doi.org/10.1155/2013/906178.

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In the present investigation, pulsatile release beads were prepared by ionic gelation technique. Lornoxicam dual cross-linked beads were prepared by dropping dispersed phase of lornoxicam, pectin, and sodium alginate into the dispersion phase of different concentrations of calcium chloride solution followed by aluminium chloride solution. The formulated beads were further coated by Eudragit L & S 100 in the ratio 1 : 2 w/w in order to achieve desired lag time. In vitro release study showed lag time of 5–8 h before release of lornoxicam from the formulated beads. Thus, formulated dual cross-linked beads when administered at bed time may release lornoxicam when needed most for chronotherapeutics of early morning rheumatoid arthritis attacks in chronic patients.
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Salahuddin, Bidita, Shazed Aziz, Shuai Gao, Md Shahriar A. Hossain, Motasim Billah, Zhonghua Zhu i Nasim Amiralian. "Magnetic Hydrogel Composite for Wastewater Treatment". Polymers 14, nr 23 (22.11.2022): 5074. http://dx.doi.org/10.3390/polym14235074.

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Nanocomposite hydrogels are highly porous colloidal structures with a high adsorption capacity, making them promising materials for wastewater treatment. In particular, magnetic nanoparticle (MNP) incorporated hydrogels are an excellent adsorbent for aquatic pollutants. An added advantage is that, with the application of an external magnetic field, magnetic hydrogels can be collected back from the wastewater system. However, magnetic hydrogels are quite brittle and structurally unstable under compact conditions such as in fixed-bed adsorption columns. To address this issue, this study demonstrates a unique hydrogel composite bead structure, providing a good adsorption capacity and superior compressive stress tolerance due to the presence of hollow cores within the beads. The gel beads contain alginate polymer as the matrix and MNP-decorated cellulose nanofibres (CNF) as the reinforcing agent. The MNPs within the gel provide active adsorption functionality, while CNF provide a good stress transfer phenomenon when the beads are under compressive stress. Their adsorption performance is evaluated in a red mud solution for pollutant adsorption. Composite gel beads have shown high performance in adsorbing metal (aluminium, potassium, selenium, sodium, and vanadium) and non-metal (sulphur) contaminations. This novel hybrid hydrogel could be a promising alternative to the conventionally used toxic adsorbent, providing environmentally friendly operational benefits.
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B, Naga Roopini, i Pradeep Kumar M. "Formulation and Evaluation of Mucoadhesive Beads of Dexamethasone". International Journal of Clinical Pharmacokinetics and Medical Sciences 3, nr 2 (21.08.2023): 63–71. http://dx.doi.org/10.26452/ijcpms.v3i2.504.

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The goal of the current study was to formulate and evaluate mucoadhesive Dexamethasone beads to significantly lengthen the duration of the drug's stay in the GI system to treat Crohn’s disease. Dexamethasone is a corticosteroid that acts as an anti-rheumatic and anti-inflammatory. To decrease the dosage frequency Dexamethasone adhesive beads were formulated for Intimate contact with the underlying absorption surface is made possible by a prolonged stay at the location, which enhances the drug's therapeutic effectiveness. In the current study, calcium chloride and aluminium chloride were utilised as cross-linking agents to create Dexamethasone mucoadhesive beads employing adhesive polymers like sodium alginate, HPMC, and Eudragit L-100. The prepared beads' entrapment efficiencies ranged from 57.15 to 99.16%. Regarding entrapment effectiveness, particle size, surface properties, and in-vitro drug release experiments, the impact of bioadhesive polymers and cross-linking ions was assessed. The MPS-7 delayed the drug's release for 12 hours, which may be related to the cross-linking agent aluminium chloride. According to drug release kinetics, all of the formulations were more linear concerning zero order (r2=0.99) than concerning first order (r2=0.751 to 0.828). Super Case 2 Transport was discovered to be the precise release mechanism.
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Egwuonwu, Njoku, Romanus. "Evaluation of the Heat Transfer Performance of Stearic Acid PCM/ Porous Aluminium Thermal Composite Structures for Heat Storage Applications". Mediterranean Journal of Basic and Applied Sciences 06, nr 02 (2022): 74–84. http://dx.doi.org/10.46382/mjbas.2022.6209.

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Phase change material (PCM) thermal composites consisting of porous aluminium/stearic acid phase change material have been produced for heat storage applications. Porous aluminium/stearic acid composite structures were produced by infiltrating stearic acid PCM into open- cell porous aluminium materials prepared by using dissolvable spherical salt beads in combination with vacuum casting process. Scanning electron microscopic analysis has been used to characterize the empty porous aluminium materials and the results reveal a cellular structure consisting of spherical pores which are interconnected with smaller windows. The thermal response of empty porous aluminium structures and those infiltrated with stearic acid was measured using an infrared camera. The result showed that the heat transfer performance of the PCM thermal composites was significantly improved and largely dependent on the relative density of the porous structures.
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Giri, Tapan Kumar, Tania Adhikary i Subhasis Maity. "Development of Capsaicin Loaded Hydrogel Beads for In vivo Lipid Lowering Activities of Hyperlipidemic Rats". Drug Delivery Letters 9, nr 2 (15.05.2019): 108–15. http://dx.doi.org/10.2174/2210303109666190128151605.

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Objective: The presence of capsaicin in the diet has been revealed to enhance energy expenditure and it has been used in anti-obesity therapy. The present work investigated the potential antihyperlipidemic effect of capsaicin loaded hydrogel beads on hyperlipidemic rats. Hydrogels are three dimensional, hydrophilic, polymeric networks capable of imbibing large amounts of water or biological fluids. Methods: Capsaicin loaded hydrogel beads were prepared by the ionotropic gelation method using Aluminium Chloride (AlCl₃) as a cross-linking agent. The characterization of hydrogel beads was carried out by X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), and Scanning Electron Microscopic (SEM) analysis. Results: The surface morphology revealed that the prepared beads were spherical in shape. XRD and DSC study of the hydrogel beads revealed that the drug was homogeneously dispersed in the hydrogel matrix. The beads showed pH sensitive behavior and when the medium pH was changed from 1.2 to 7.4, the capsaicin release was considerably increased. 100mg/kg body weight of Triton was injected intraperitoneally in rats to induce hyperlipidemia and it showed elevated levels of serum cholesterol and triglyceride. Capsaicin loaded hydrogel beads were administered to normal and hyperlipidemic rats for 7 days and the prepared hydrogel beads were significantly reduced high lipid profile in comparison to free capsaicin. Conclusion: The results clearly demonstrated that hydrogel beads can be used as a potential carrier for delivery of capsaicin to reduce lipid profile.
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Grum, Janez, i Uros Zupanc. "Surface Analysis after Shot Peening Processing of ENAW 7075 Aluminium". Materials Science Forum 589 (czerwiec 2008): 385–90. http://dx.doi.org/10.4028/www.scientific.net/msf.589.385.

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Shot peening has been a very important and well-known surface cold-hardening process applicable to various machine parts and tool surfaces for quite a long time since it improves fatigue strength and corrosion resistance of stressed surfaces. Hardening by shot peening provides, because of plastic deformation, an increase in hardness and induces compressive residual stresses in the thin surface layer, which reduces material fatigue and prevents the generation and propagation of cracks. The present paper reports of results of shot peening hardening of specimens made of 7075-T651 aluminium. They were surface-hardened by steel shots M170 with Almen hardening intensity of 8A and 12A respectively and by glass beads GP165 with Almen hardening intensity of 12A. The steel shots and glass beads had the same diameter but differed considerably in hardness and density. The surface condition after shot peening processing was assessed in terms of surface integrity, which establishes a relation between processing conditions and roughness state and hardened-layer depth supported by an analysis of residual-stress variations.
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Merklein, Marion, i Martin Grüner. "Mechanical Behaviour of Ceramic Beads Used as Medium for Hydroforming at Elevated Temperatures". Key Engineering Materials 410-411 (marzec 2009): 61–68. http://dx.doi.org/10.4028/www.scientific.net/kem.410-411.61.

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The need of light weight construction for high efficient vehicles leads to the use of new materials like aluminium and magnesium alloys or high strength and ultra high strength steels. At elevated temperatures the formability of steel increases as the flow stresses decrease. Forming high complex geometries like chassis components or components of the exhaust system of vehicles can be done by hydroforming. The hydroforming process by oils is limited to temperatures of approximately 300 °C and brings disadvantages of possible leakage and fouling. Using granular material like small ceramic beads as medium could be an approach for hydroforming of ultra high strength steels like MS W1200 and CP W800 at temperatures up to 600 °C. The material properties of granular material are in some points similar to solid bodies, in other points similar to liquids. For understanding and simulation of the behaviour of the medium a basic characterisation of ceramic beads with different ball diameters is necessary. Powder mechanics and soil engineering give ideas for experimental setups. For the conversion of these approaches on the one hand the behaviour of the ceramic beads itself has to be characterized, on the other hand the contact between a blank and the beads have to be investigated. For the tests three different kinds of spheres with a diameter between 63 microns and 850 microns are used. In unidirectional compression test compressibility, pressure distribution in compression direction and transversal compression direction and the effect of bead fracture are investigated. The tests are carried out at different compression velocities and for multiple compressions. For determination of friction coefficients between blank and beads and determination of shear stress in bulk under compression a modified Jenike-Shear-Cell for use in universal testing machines with the possibility of hydraulic compression of the beads is built up. The gained data can be used for material modelling in ABAQUS using Mohr-Coulomb or Drucker-Prager model.
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Cheng, Zhenmin, Gang Luo, Yanling Tang, Dan Ling, Zhaoxuan Chen, Peng Liu i Bo Zhang. "External Wetting Efficiency in a Three-Phase Fixed Bed Loaded with Porous and Non-Porous Packings". Processes 10, nr 1 (10.01.2022): 135. http://dx.doi.org/10.3390/pr10010135.

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Films and rivulets are the two basic forms of dynamic liquid in a three-phase fixed bed (trickle bed), which determines the wetting efficiency of the catalyst. This paper is devoted to the conflicting wetting performance observed between non-porous glass beads and less wettable porous alumina, and a parallel zone model is applied to resolve the complex liquid flow texture. It shows in both cases of glass beads and aluminium pellets, the pressure drop, film flow and rivulet flow fractions all display pronounced multiplicities along with the liquid flow rates in increasing and decreasing branches, although the rivulet flow fraction is reduced to 0 in the liquid decreasing branch started from pulsing flow in both cases. Different from the glass beads, there is almost no wetting efficiency difference for the alumina pellets with respect to liquid flow rate increasing or decreasing, which is in agreement with the dynamic liquid holdup measurements. The liquid is significantly more uniformly distributed over the crosssection in the Al2O3 bed since rivulet flow is much reduced than in the case of glass beads.
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Olczak, Jerzy. "W sprawie wytwórczości szklarskiej w celtyckim oppidum w Starym Hradisku na Morawach". Folia Praehistorica Posnaniensia 13 (1.11.2018): 215–29. http://dx.doi.org/10.14746/fpp.2005.13.15.

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Discussion presented in the article is based upon analysis of glass fragments from the late La Tene oppidum. Existence of the jewellery manufacture workshop in Stare Hradisko, producing bracelets and possibly also beads of dark-blue, dark-yellow and green glass of external origin, is speculated based upon chemical composition of 5 fragments as well as morphological analysis. Further complex studies are postulated, which will facilitate unequivocal testing of the speculation about existence of glass works in StareHradisko. Analysed samples revealed presence of the soda-calcium-aluminium-silicon as well as the soda-calcium-lead-aluminium-silicon glass.
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Göttmann, Alexander, Chris Mertin, Linda Mosecker, Andreas Naumov i Markus Bambach. "Properties of Friction Stir Welded Blanks Made from DC04 Mild Steel and Aluminum AA6016". Advanced Materials Research 769 (wrzesień 2013): 237–44. http://dx.doi.org/10.4028/www.scientific.net/amr.769.237.

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Due to increasing demands for lightweight structures in automotive applications the use of sheet metal components made from aluminium alloys is a promising approach for weight reduction. The combination of steel and aluminium in car bodies may be an interesting alternative compared to a monolithic material design. The weight of structural parts of a car body shell can be reduced if dedicated parts consist of aluminium instead of steel. This approach allows for an optimal exploitation of the material properties of both materials, bringing high strength into highly loaded areas while areas subject to lower loads are equipped with lower strength and weight. However, a multi-material design combining steel and aluminium demands for suitable joining methods, especially if a forming operation is applied to the welded sheets. In conventional fusion welding processes the formation of intermetallic phases due to the metallurgical affinity of aluminium and iron is a serious problem. Recent developments in regulated cold metal transfer (CMT) welding technologies at the Institute of Welding Technology and Joining Technology (ISF) at the RWTH Aachen promise an appropriate solution to this problem. Due to a digitally regulated arc technology, the heat input in CMT is reduced to a minimum. However, the inevitable formation of a welding bead in arc processes with filler material is a criterion of exclusion in the case of production of welds for car body shells. To achieve an optimal appearance of the body shell, the welding beads need to be removed from both sides of the sheet in a second manufacturing step. Hence, to avoid further costs, it seems expedient to search for alternative welding technologies. Friction stir welded (FSW) joints show relatively even welding beads. Furthermore, this joining method is characterised by a low process temperature, which is considerably below the melting temperature of the base materials. Hence, FSW is a promising joining technique to produce tailored blanks out of aluminium and steel. The main objective of the present paper is the evaluation of suitable process parameters for the production of FSW butt joints with a thickness of 1 mm made from the aluminium alloy AA6016-T4 and the mild steel DC04. Welding experiments using a varying rotational speed, tool offset, tool velocity, tool plunge depth and tool tilt angle were carried out. To identify the best parameters in terms of the strength of the joint, tensile tests were performed. It is shown, that an amount of approximately 85% of the tensile strength of the base material AA6016 can be achieved. Using SEM the formation of the fracture surfaces was analysed. Different fracture types were identified and the possible reasons for their occurrence are discussed. It is shown that in the case of optimal joining procedure the failure occurs in the thermomechanically affected zone in the aluminium sheet, were the plastic deformation is low. Additionally, thermography has been employed to evaluate the temperature distribution during the process. In metallographic investigations it was found that during welding the microstructure of the aluminium base material changes due to plastic deformation and temperature increase in the area of the weld seam. Using hardness measurements the change of the mechanical properties in the contact zone of both base materials and in the heat affected zone was examined. Finally, an outlook is given with respect to the possibilities of producing FSW welded sheets that can be formed using conventional deep-drawing.
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Rozprawy doktorskie na temat "Aluminium Beads"

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Sephar, Carlos Roberto. "The genetics of aluminium tolerance in soya beans Glycine max (L.) Merrill". Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315191.

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Nguyen, Anh Vy. "Structural Behaviour and Design of Aluminium Lipped Channel Beams Under Combined Actions". Thesis, Griffith University, 2022. http://hdl.handle.net/10072/414923.

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During recent decades, the use of aluminium lipped channel (ALC) beams as purlins, and floor joists in roof and floor systems in the construction industry has significantly increased due to their superior mechanical characteristics compared to steel, such as durability, light weight, high strength to weight ratio, and being weatherproof. However, despite these advantages, the elastic modulus of aluminium is only one-third that of steel. Hence ALC beams with shorter span lengths are vulnerable to buckling failures under concentrated load, such as shear and web crippling. On the other hand, ALC beams with longer span lengths can fail due to combined actions such as bending and shear actions, and bending and web crippling actions. In the past, the structural response of ALC beams has been investigated, but only under single actions of shear, web crippling, and bending. However, the behaviour of ALC beams subjected to combined bending and shear actions, and bending and web crippling actions needs to be investigated for real-world engineering applications. To address this research gap, experimental and numerical investigations on the strength and behaviour of ALC beams subjected to two scenarios of combined bending and shear actions, and combined bending and web crippling actions were conducted, and are presented in this thesis. The first step of the research focused on experimental investigation. Subsequently, numerical investigations including validation and parametric studies were carried out. Finally, the current available design rules were assessed and new design rules were proposed where needed. The experimental study comprised four test series of pure bending, web crippling, combined bending and shear actions, and combined bending and web crippling actions, using 12 different ALC sections. All ALC beams chosen for the experimental test program were supplied by BlueScope Permalite, Australia. The test specimens were fabricated by roll-forming method using aluminium alloy 5052-H36. A total of 62 tests were conducted on the ALC specimens, consisting of six four-point bending tests undergoing local buckling; nine web crippling tests under unfastened interior-one-flange (IOF) loading condition; 24 combined bending and shear tests considering two aspect ratios (ARs) of 1.5 and 2.0; and 23 combined bending and web crippling tests considering five interaction factors of 1.0, 1.5, 2.0, 2.5 and 3.0 under unfastened IOF loading condition. In the numerical study, nonlinear finite element (FE) models of ALC beams using ABAQUS/CAE software package were developed to simulate the behaviour of such beams under pure shear, web crippling, bending and combined actions. The developed FE models were validated by comparing the finite element analysis (FEA) results with those obtained from the tests. Good agreements were achieved throughout three criteria of ultimate capacities, applied load versus vertical displacement curves, and failure modes. The developed FE models were then used to undertake a detailed parametric study to obtain a large dataset of the strengths of the ALC sections with different parameters. The ultimate capacities of ALC beams obtained from the tests and FE models were compared with those predicted using current design rules of AS/NZS 4600, including direct strength method (DSM), AS/NZS 1664.1, AISI S100, Eurocode 3 Part 1-3, and the previously proposed design equations. It was found that the current DSM was safe in predicting the ultimate bending moment capacities of ALC beams undergoing local buckling. The previously proposed design equations were reasonably reliable in predicting the shear and web crippling capacities of the ALC beams. The available design equations in the form of circular and linear interaction curves provided by AS/NZS 4600 and developed in the previous study were too conservative in estimating the combined bending and shear capacities of the ALC beams. Hence, new design equations were proposed in the current study for the accurate prediction of the capacities of ALC beams under combined bending and shear actions. The current design rules of AS/NZS 4600, AISI S100, and Eurocode 3 Part 1-3 are not suitable to predict the combined bending and web crippling capacities of the ALC beams accurately. Therefore, new design equations were developed for the accurate prediction of the combined bending and web crippling capacities of the ALC beams under unfastened and fastened IOF loading conditions.
Thesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Eng & Built Env
Science, Environment, Engineering and Technology
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Cheng, Chung-choi. "Positron beam studies of fluorine implanted gallium nitride and aluminium gallium nitride". Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B43278577.

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Cheng, Chung-choi, i 鄭仲材. "Positron beam studies of fluorine implanted gallium nitride and aluminium gallium nitride". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B43278577.

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Knorr, Nicholas J. "Fundamental studies of growth mechanisms in physical vapour deposition of aluminium". Thesis, University of Salford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365971.

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Jinnapat, Apichart. "The manufacture and characterisation of aluminium foams made by investment casting using dissolvable spherical sodium chloride bead preforms". Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.588085.

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This project sought to design, implement and evaluate a process for the manufacture of porous, spherical salt beads, in order to enhance the reproducibility in mechanical properties of open cell aluminium foams made by a replication-based manufacturing technique. Porous beads were favoured in order to increase the dissolution rate of the salt from the preform, thereby making the manufacture of large foam parts practical. Salt beads were made by a novel method using fine NaCI powder, flour and water to make a paste that was subsequently disintegrated into large beads by mechanical stirring in oil. The NaCI paste viscosity was found to be important to the production of spherical beads and by varying the intensity of mechanical disintegration of the paste, control of the bead size was possible. The salt beads with sizes from 0.5 to 3 mm diameter were compacted into preforms and made into moulds for infiltration with molten pure aluminium by pressure- assisted investment casting. The heat treatment used to "cure" the plaster mould containing the preform was sufficient to remove the flour from the beads, sinter the preform and increase its strength. The effect of preform compaction conditions on the size, shape and volume fraction of porosity was quantified using a number of techniques, including mercury porosimetry, which was used to model the infiltration process. At the highest infiltration pressure 0.25 MPa (2.5 bar) the resulting foam densities were higher, but led to extensive penetration of molten aluminium into the porous beads, slowing down salt removal. In general, the compression strength increased with increasing foam density, and was highly reproducible, but where metal infiltration into the beads was extensive, the foam density increased but with little improvement in the compressive strength.
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Kubínová, Veronika. "Vysokoškolské koleje". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392203.

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The diploma thesis deals with project of a new building of university dormitories in the city center of Brno. It is detached building with basement and four above-ground floors with the irregular rectangular shape. Dormitories can be divided into three fundamental parts. The underground garages can be considered as the first part. Parking places are designed only for students, occasional visitors, and employees. In the underground floor, technical rooms and large warehouse can be found. The second part is designed to the general public including association areas such as reception, coffee-house with outdoor terrace, copy center and tobacco shop. Rooms for students, manager offices, repairman’s room, and laundry can be found in the third part. In total there are 44 two-person rooms and one room for a disabled person on the second floor. The structural system of the building is a cast-in-place concrete frame with a filling of ceramic fittings. The external wall is insulated with mineral wool with a ventilated facade and fiber-cement facade tiles. The building is based on base piles with a pile under each pillar. Vegetation covers a flat roof as well as a part of the north side of the facade. There will also be a public park and two volleyball fields in the area.
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Jášková, Aneta. "Penzion s kavárnou". Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371954.

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The scope of this diploma thesis is design and processing of the project documentation of the guesthouse along with coffee shop. The proposed object of this thesis is located in the village Čeladná next to the golf course Prosper Golf Resort Čeladná, in the location designated for mixed constructions. One of the double-storeyed, non-cellular object with roofed surface and steep roof. The object is based on the base stripes made of plain concrete and on the reinforced concrete flaps. Carrying, perihepral and dividing walls are designed on the Velox systém. The same systém was used to design roof constructions. In the rooms with excessive width are filled with reinforced concrete columns. Part of the guesthouse and second floor of the coffee shop is designed with ventilated facade with wood paneling ThermoWood. The object is divided in two parts with common entrance section. One part of the coffee shop has ability to handle capacity of 70 guests. Part of the double-storeyed coffee shop is hygienic facilities, kitchen, room for employees, warehouse and mechanical ventilation. Second part of the object is the guesthouse with flat of the manager of the guesthouse. The guesthouse consists of room with hygienic facilities for 18 people, including barrier-free room. The rooms are divided in the first floor on separate units, the rooms with hygienic facilities and the apartments in the second floor has two rooms, kitchen and hygienic facilities. For the next parts of the guesthouse is warehouse clean and dirty laundry and shared kitchen. The whole first floor is designed as barrier-free. In front of the object is the parking lot for 21 cars, which 3 of the parking places are for the cars of the disabled.
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Soni, Harsh. "Flocks, Flow and Fluctuations in Inanimate Matter : Simulations and Theory". Thesis, 2015. https://etd.iisc.ac.in/handle/2005/4229.

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In this thesis we study a novel soft-matter system that imitates motility. Our system consists of a few asymmetrically tapered brass rods and aluminium beads which are confined between two vertically shaking plates. The rods are motile due to interplay of their the fore-aft asymmetric shape, vibrational energy input, and the mechanics of contact with the bounding surfaces. Experiments done by our col- laborators revealed that the system undergoes a phase transition from a disordered state to an ordered coherently moving flock above a critical bead concentration. We have used time-driven numerical simulations and analytical theory to understand the physics underlying the phenomenon.
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CHANG, CHUNG-HAO, i 張中豪. "Laser processing at the Aluminium-coated glass by Bessel beams". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/b365k6.

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碩士
國立中正大學
光機電整合工程研究所
105
Ultrashort pulses laser, besides water jet-based and diamond tool-based, is a common method for glass substrate cutting. It provides a kind of material modification in the focal of volume method to separate materials. This type of processing method has characteristics such as extremely small pulse width (femtoseconds or even picoseconds), the ability of fine processing in substrates (to micron scale) and the ability to process on both metal and non-metal non-transparent materials. The principle behind laser processing is to remove surface material on the substrate by laser ablation, focus inside the substrate via thin and homogenous Bessel beans and cut through substrates after various laser scans. In this study, we use optical analysis design software ASAP to create the optical system. We analyze the energy distribution on the central focus spot after the Gaussian bean passing through the lens group. From the analysis, we are able to understand the transmission distance and the beam profile characteristics of Bessel beam. We also are able to obtain the required distance for processing in work environment through different lens combinations and to discuss possible factors that will affect the process quality of Bessel beam. Through the comparison between experiment and simulation, we are not only able to find the optimal the central of spot size and depth of focus for processing substrate cutting, but also improve the completeness of the beam profile from Bessel beam. Keywords: Bessel beam, Laser processing
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Książki na temat "Aluminium Beads"

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R, Jan, i Langley Research Center, red. A fundamental study of laser beam welding aluminum-lithium alloy 2195 for cryogenic tank applications. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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M, Viens, Wang L i Goddard Space Flight Center, red. Evaluation of engineering properties of Al-Li alloy X2096-T8A3 extrusion products. Greenbelt, Md: National Aeronautics and Space Administration, Goddard Space Flight Center, 1999.

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M, Viens, Wang L i Goddard Space Flight Center, red. Evaluation of engineering properties of Al-Li alloy X2096-T8A3 extrusion products. Greenbelt, Md: National Aeronautics and Space Administration, Goddard Space Flight Center, 1999.

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Parker, Philip M. The 2007-2012 World Outlook for Aluminum Stairs, Staircases, Fire Escapes, and Metal Plaster-Base Corner Beads, Screens, Grounds, and Other Accessories. ICON Group International, Inc., 2006.

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The 2006-2011 World Outlook for Aluminum Stairs, Staircases, Fire Escapes, and Metal Plaster-Base Corner Beads, Screens, Grounds, and Other Accessories. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 Outlook for Aluminum Stairs, Staircases, Fire Escapes, and Metal Plaster-Base Corner Beads, Screens, Grounds, and Other Accessories in Japan. ICON Group International, Inc., 2006.

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Parker, Philip M. The 2007-2012 Outlook for Aluminum Stairs, Staircases, Fire Escapes, and Metal Plaster-Base Corner Beads, Screens, Grounds, and Other Accessories in Greater China. ICON Group International, Inc., 2006.

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Holloway, John Ramsey. Illustrated Theatre Production Guide. Taylor & Francis Group, 2014.

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Holloway, John Ramsey. Illustrated Theatre Production Guide. Taylor & Francis Group, 2014.

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Illustrated Theatre Production Guide. Taylor & Francis Group, 2020.

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Części książek na temat "Aluminium Beads"

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Dagdigian, Paul J., Xin Yang, Irina Gerasimov i Jie Lei. "Electronic Spectroscopy and Excited State Dynamics of Aluminium Atom-Molecule Complexes". W Atomic and Molecular Beams, 367–78. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56800-8_26.

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Szumigała, M., M. Chybiński i Ł. Polus. "Composite beams with aluminium girders – a review". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 249–55. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-30.

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Szewczyk, P., i M. Szumigała. "Strengthening of steel-concrete composite beams in experimental study". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 242–48. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-29.

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Petrov, P. "Surface Modification of Aluminium Alloys Using High Intensity Beams". W Advanced Light Alloys and Composites, 501–5. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-015-9068-6_66.

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Tucki, P., i E. Hotała. "Innovative bolted end-plate connections for high web I-beams". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 370–77. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-47.

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Gdoutos, E. E., i D. A. Zacharopoulos. "Aluminum/Foam Sandwich Beams in Three-Point Bending". W Experimental Analysis of Nano and Engineering Materials and Structures, 755–56. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1_375.

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Kuś, J., i T. Maleska. "Lateral torsional buckling of tapered steel I-beams with stiffener ribs". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 428–34. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-55.

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Wierzbicki, K., i M. Szumigała. "Influence of bimoment restraints on load-bearing capacity of steel I-beams". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 141–47. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-15.

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Lee, Sung Hyuk, Hyung Jin Kim i Nak Sam Choi. "Bending Performance Analysis of Aluminum-Composite Hybrid Tube Beams". W Fracture and Strength of Solids VI, 769–74. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-989-x.769.

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Rzeszut, K., I. Szewczak, P. Różyło i M. J. Guminiak. "Buckling analysis of thin-walled sigma beams with respect to different numerical descriptions". W Modern Trends in Research on Steel, Aluminium and Composite Structures, 178–84. London: Routledge, 2021. http://dx.doi.org/10.1201/9781003132134-20.

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Streszczenia konferencji na temat "Aluminium Beads"

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Iwatani, Shingo, Yasuhito Ogata, Keisuke Uenishi, Kojiro F. Kobayashi i Akihiko Tsuboi. "Diode Laser Cladding on A5052 Aluminium Alloy for Wear Resistance". W ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72442.

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In order to improve a wear resistance of aluminium alloy, we proposed a diode laser cladding on the surface of a A5052 aluminium alloy. Firstly, an applicability of diode laser to laser cladding was evaluated. In this result, application of diode laser made it possible to obtain stable beads in low heat input compared with CO2 laser. According to the increase in aluminium content in the obtained clad layer, the microstructure of the clad layer changed as γ (8∼20%) → γ + α (10∼30%) → Fe3Al (30%∼). At the interface between the clad layer and the aluminium alloy substrate, the reaction layer consisting of Fe2Al5 and FeAl3 formed. In the abrasion wear the obtained clad layers exhibited a higher wear resistance compared with the aluminium alloy.
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Anapayan, T., M. Mahendran i D. Mahaarachchi. "Inelastic Bending Capacity of Litesteel Beams". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp024-icsas11.

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Bradford, M. A. "Strength Design of Curved Crane Monorail Beams". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp004-icsas11.

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Emblom, William J. "Stamp Forming: A Comparison in the Use of Draw Beads and Blank Holder Force for Producing Aluminum Panels". W ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23109.

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Abstract An investigation was performed examining the effects of draw beads and blank holder forces on local forces in various regions of a stamp forming process that produced oval aluminum panels. The results showed that provided there was sufficient blank holder forces to prevent wrinkling, the regions with draw beads were affected more by draw bead height than by blank holder force. However, at the die ends, away from the draw beads, blank holder force had more of an effect than the draw beads did with respect to local forces. Additionally, the draw bead height effects at the die end were not directly related but had to be interpreted based upon the effect on strains within the flange region at the die ends. This study may be especially useful for researchers in the automotive sector who are particularly interested in aluminum panel forming.
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Yam, M. C. H., A. C. C. Lam i K. S. Seak. "Block Shear Strength of Coped Beams with Connection Eccentricity". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp082-icsas11.

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Yu, Y., i S. P. Chiew. "Debonding Prediction of Carbon Fiber Reinforced Polymer Bonded Steel Beams". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp071-icsas11.

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Yang, J., i Q. Liu. "Pseudo-Plastic Design of Continuous Beams of Cold-Formed Sigma Sections". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp022-icsas11.

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Kankanamge, N. Dolamune, i M. Mahendran. "Numerical Study of Cold-Formed Steel Beams Subject to Lateral-Torsional Buckling". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp023-icsas11.

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Al-Deen, S., G. Ranzi i Z. Vrcelj. "Design Considerations for the Long-Term Behaviour of Composite Steel-Concrete Beams". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp033-icsas11.

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Basaglia, C., i D. Camotim. "Buckling, Post-Buckling, Collapse and Design of Three Span Cold-Formed Steel Beams". W 7th International Conference on Steel and Aluminium Structures. Singapore: Research Publishing Services, 2011. http://dx.doi.org/10.3850/978-981-08-9247-0_rp021-icsas11.

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Raporty organizacyjne na temat "Aluminium Beads"

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HUYNH, Le Anh Thi, Cao Hung PHAM i Kim J. R. RASMUSSEN. EXPERIMENTAL INVESTIGATION OF COLD-ROLLED ALUMINIUM ALLOY 5052-H36 BEAMS UNDERGOING LOCAL BUCKLING. The Hong Kong Institute of Steel Construction, grudzień 2018. http://dx.doi.org/10.18057/icass2018.p.118.

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