482 research outputs found
Comparison of anaerobic digestion of various food and non-food wastes: impact of inoculum source on biogas production
No full textThis study investigated how the inoculum source and type of organic waste influence biogas production, removal of various pollutants, and chemical parameters under thermophilic conditions at 55 °C. The three inoculum sources evaluated were horse manure (HM), cattle manure (CM), and municipal sewage sludge. The study evaluated the biochemical methane potential (BMP) of several substrates including food waste (FW), orange peel (OP), coffee grounds (CG), duckweed (Lemna gibba) (DW), and seagrass (SG). The results indicated differences in biogas production depending on the inoculum used. With horse manure, the highest yield was obtained by DW, producing 4549.87 ml of biogas per gram of total volatile solids (TVS). Using DW with CM had a maximum production of 7423.05 ml/g of TVS, while using anaerobic sludge as inoculum consistently produced the least biogas with all substrates. The study also evaluated the removal efficiency of various parameters including COD, TS, TVS, NH4+ and TKN. Finally, the estimated kinetic parameters for the biogas production potential and rates were discussed using the first order model and the modified Gompertz model, and found that the modified Gompertz plot had a higher correlation than the first-order model with the maximum plot to simulate the biogas accumulation production
Supplemental Material - Dosing Strategy for Osteobiologics Used in Acdf Surgery, Influence on Fusion Rates and Associated Complications. A Systematic Literature Review
No full textSupplemental Material for Dosing Strategy for Osteobiologics Used in Acdf Surgery, Influence on Fusion Rates and Associated Complications. A Systematic Literature Review by Waeel O. Hamouda, Sotiris Veranis, Oscar Krol, Navraj S. Sagoo, Peter G. Passias, Zorica Buser, Hans Joerg Meisel and Tim Yoon in Global Spine Journal</p
Development of a virtual reality milling machine for knowledge learning and skill training
No full textCurrent methods of training personnel on high cost machine tools involve the use of both classroom and hands on practical training. The practical training required the operation of costly equipment and the trainee has to be under close personnel supervision. The main aim of this project is to reduce the amount of practical training and its inherent cost, time, danger, personal injury risk and material requirements by utilising a virtual reality technology.
In this study, an investigation into the use of Virtual reality for training operators and students to use the Milling Machine was carried out. The investigation has been divided into two sections: first the development of Milling Machine in the 3D virtual environment, where the real machine was re-constructed in the virtual space.
This has been carried out by creating objects and assembling them together. The complete Milling machine was then properly modelled and rendered so it could be viewed from all viewpoints.
The second section was to add motion to the virtual world. The machine was made of functions as for the real machine. This was achieved by attaching Superscape Control Language (SCL) to the objects. The developed Milling machine allows the users to choose the material, speed and feed rate. Upon activation, the virtual machine will be simulated to carry out the machining process and instantaneous data on the machined part can be generated.
The results were satisfactory, the Milling Machine was modelled successfully and the machine was able to perform according to task set. Using the developed Virtual Model, the ability for training students and operators to use the Milling Machine has been achieved
Eyewitness: Platform Design for Visualizing and Synthesizing Media Video Content of Political Significance
No full textThis paper explores the conventions and limitations of the photographic medium, both material and representational. Suggesting that photography is situated at an important point within its evolution, the paper searches for new directions within a photo-based practice, which continues to challenge and push the limits of the medium. Examining the way in which photography mediates and shapes experience, this thesis engages with popular photography, as a language with its own syntactical and semantic rules. Through explorations of the syntax of photography, parallels are drawn between the structure of language and the structure of photography. Metonymic structures within photographic language are discussed, with examples of the artist's work that aim to reveal and disrupt the metonymic nature of images. The role of collecting in the practice is defined as a first step in a process of coming to understand the world and its representations. Asserting the power of collage to disrupt and challenge representations, through a process of play and embracing ambiguity and uncertainty, the thesis culminates with a discussion of the development of genre mixing within the practice as a necessary evolution
O-Blue for Outlier Tests
No full textThe O-BLUEs defined by Moussa-Hamouda and Leone(1974) are considered and the effect of an outlying observation in these estimates are studied for a regression model. Then these estimates are used in developing two outlier test procedures. The results are highlighted with an example. The power of these procedures are studied and the power values for the same example are also tabulated
Buckling and crushing behavior of foam-core hybrid composite sandwich columns under quasi-static edgewise compression
No full textBuckling and crushing behavior of foam-core hybrid composite sandwich columns under edgewise compressive load is dealt in this study. Composite laminates with different stacking sequence configurations made of glass and Dyneema-woven fabrics and AL 2024-T3 sheets were used in combination of polyvinyl chloride foam core to manufacture the specimens. Effects of face sheet thickness and stacking sequence configuration, slenderness ratio, boundary conditions, and sandwich reinforcement with through-thickness resin pins on the buckling and crushing behavior of the specimens were investigated. The results revealed that using the resin pins changes the unstable Euler buckling mode to a more stable progressive end-crushing and significantly increases the buckling load, specific buckling load, and energy absorption capability, which are highly favorable. Also, the results showed that in the specimens with fiber metal laminates, the major failure modes are face sheet-core debonding and face sheet delamination. However, based on the results, specimen with hybrid face sheets made from Dyneema fabrics and aluminum plates has the highest buckling load as well as the highest specific buckling load. Also, a specific fixture was designed to laterally clamp the sandwich column which causes a reduction in the probability of specimen end-crushing and significantly increases the buckling load. - The Author(s) 2019.The publication of this article was funded by the Qatar National Library.Scopu
Rae and the Tradition of Scottish Political Economy
No full textThe purpose of the chapter is to investigate how far Rae is representative of the Scottish Political Economy Tradition, where tradition is understood in terms of continuity in a shared approach, allowing for theoretical differences. While Rae conforms to most features identified with the Scottish tradition, his opposition to Smith’s methodology suggests a divergence of approach which would put him outside the tradition. It is argued here that this divergence applies only to Rae’s professed methodology, not to his practice
FIG. 2 in Leptophascum leptophyllum (Müll.Hal.) J.Guerra & M.J.Cano (Bryophyta: Pottiaceae), a genus and species new to Egypt
No full textFIG. 2. — Leptophascum leptophyllum (Müll.Hal.) J.Guerra & M.J.Cano: A, B, dry plant; C, D, moist plant; E-H, leaves; I, J, leaf apices; K-M, upper leaf cells; N, O, basal leaf cells; P, rhizoids at leaf tip; Q-U, leaf cross-sections; V-X, stem cross-sections; Y, archegonium. Scale bars: A, B, 2 mm; C, 1 mm; D, 1.7 mm; E, F, N, 0.3 mm; G, H, 0.6 mm; I, Y, 0.2 mm; J, L, O, Q-U, 0.1 mm; K, P, 0.5 µm; M, 0.2 µm; V-X, 0.8 µm.Published as part of A., Gamal M., Lashin, Abdelhaliem, Ekram M., A., Gehad A. & Hamouda, 2022, Leptophascum leptophyllum (Müll.Hal.) J.Guerra & M.J.Cano (Bryophyta: Pottiaceae), a genus and species new to Egypt, pp. 167-171 in Cryptogamie, Bryologie 20 (10) on page 169, DOI: 10.5252/cryptogamie-bryologie2022v43a10, http://zenodo.org/record/782243
Automation and data processing with the immucor Galileo (R) system in a university blood bank
No full textBackground: The implementation of automated techniques improves the workflow and quality of immuno-hematological results. The workflows of our university blood bank were reviewed during the implementation of an automated immunohematological testing system. Methods: Work impact of blood grouping and subgrouping, cross- matching and antibody search using the Immucor Galileo system was compared to the previous used standard manual and semi- automated methods. Results: The redesign of our workflow did not achieve a significant reduction of the specimen's working process time, the operator's time however was reduced by 23%. Corresponding results were achieved for blood grouping, Rhesus typing, antibody screen and for autocontrol when changing from two semi- automated to the Galileo system. Because of the higher sensitivity of the Immucor antibody detection system, the rate of the initial positive antibody screens rose from 4 to 6% Conclusion: The Immucor Galileo system automates routine blood bank testing with high reliability, specificity and higher sensitivity compared to our previous used standard manual and semi- automated methods
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