199 research outputs found
Comparative mechanical performance evaluation of recycled brick aggregate concrete and natural aggregate concrete
No full textThe global increase in construction and demolition (C&D) waste due to natural disasters and urban redevelopment presents a significant environmental challenge. This study evaluates the mechanical performance of reinforced concrete (RC) beams incorporating recycled brick aggregates (RBA) as a sustainable alternative to natural aggregates (NA). Four concrete mixes were tested: 100 % NA, 100 % RBA, and two hybrid combinations of fine and coarse aggregates. RC beams were subjected to four-point bending tests, and companion cylindrical and prismatic specimens were tested for compressive strength and modulus of rupture (MOR). Results indicate that RC beams made with RBA can achieve shear capacities comparable to those made with NA. While beams incorporating coarse brick aggregates showed a more pronounced reduction in shear strength, with values dropping to 53.0 kN, the highest shear strength (71 kN) was observed in mixes using brick fine aggregates and natural coarse aggregates, nearly matching the 70.8 kN of the 100 % NA mix. However, 100 % RBA mixes exhibited a 24 % reduction in compressive strength and a 16 % reduction in MOR compared to NA mixes. Despite these reductions, the structural behavior and failure modes remained consistent across all compositions. From a sustainability perspective, the use of RBA offers a dual benefit: reducing the demand for virgin aggregates and diverting substantial volumes of brick waste from landfills. In regions where C&D waste constitutes a significant portion of total solid waste, adopting RBA concrete could conserve millions of tons of natural resources annually. This study demonstrates the feasibility of using 100 % recycled brick aggregates in structural concrete, supporting a circular economy approach in the construction sector
Development of organosilicon cross-coupling reaction
No full textUse of palladium catalyzed cross-couplings have found widespread use in the pharmaceutical industry and there is a significant ongoing effort to either improve or devise new synthetic strategies to help build complex biologically active compounds. This is a study for advancing the use of silanols and silanolate cross-coupling in modern organic chemistrySubmission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2017-12-01The student, Zain Yousaf, accepted the attached license on 2015-09-30 at 16:34.The student, Zain Yousaf, submitted this Thesis for approval on 2015-09-30 at 16:41.This Thesis was approved for publication on 2015-10-02 at 09:28.DSpace SAF Submission Ingestion Package generated from Vireo submission #8703 on 2016-03-08 at 11:05:08Made available in DSpace on 2016-03-08T17:21:44Z (GMT). No. of bitstreams: 2
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Previous issue date: 2015-10-02Embargo set by: Seth Robbins for item 91486
Lift date: 2018-03-08T17:22:13Z
Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD systemU of I Only Restriction Lifted for Item 91486 on 2018-03-09T10:15:25Z
سید غلام مصطفٰے دی تفسیر سورہ یوسف (پنجابی تفسیری ادب دی اک کڑی)
No full textIn this article the writer reveals that many prominent Punjabi Poets wrote Poetic Commentary ofSura Yousaf (Para of Holy Quran). Some of them present their translation or commentary along withQuranic text while many of them only narrated the story of Hazrat Yousaf Alaihus Salam using poeticform of masnavi. The author of the article selected an unknown Punjabi poet naming Syed GhulamMustafa who published his commentary in 1303 after Hijra and 1886 A.D. The author presented hisanalytical study of this book and highlighted the poets great. Contribution towards Quranic Translationsduring colonial Punjab. The writers of Punjabi literary histories are still unaware of his book
Finite element analysis of double lap protruding head bolted joints in tension simulating aircraft joints
No full textValidation of NORM (Needs Oriented Framework for Producing Requirements Decision Material) Framework in Industry
No full textContext: Pre-project Requirements Engineering (RE) decisions are considered as very complex in Market Driven Requirements Engineering (MDRE). The complexity and economical impact of RE decisions motivates the need to support and understand RE decisions in MDRE. The purpose of Pre-project activities is to gather, analyze, select, and plan requirements for future releases of the software product in MDRE environment. Correct and timely pre-project decisions (for example initial requirements selection) are dependent on the quality and the availability of the provided decision material (for example requirements, business cases etc) for RE decisions. A Requirements Engineering framework called NORM (Needs Oriented Framework for Producing Requirements Decision Material) in collaboration with Ericsson AB is previously created with the intention of facilitating and speeding up the RE processes by ensuring that the right and sufficient decision material is available at the right time for pre-project RE decisions. NORM needs to be validated in software companies practicing MDRE in order to make it generally applicable in industry. Objectives: NORM framework was partially validated with informal interviews at one business unit within Ericsson AB but needed to be tested or validated in different environments (Telecom, e-commerce etc) in software industry to make sure that it becomes generally applicable in industry. The scope of this master's thesis is to investigate how to tailor NORM to improve a company's requirements engineering processes with the help of value stream mapping (VSM), and to evaluate the effort required and impact of this tailored process. Two MDRE based companies are chosen in this thesis work in order to validate NORM framework in software industry. Methods: There are two main research methods in this research work; Interviews and Document Analysis. In two MDRE based companies, we conducted interviews of employees involved in pre-project RE decision activities in a product, and accessed the requirements documents for the same product in order to initiate the NORM framework. Finally, an email was sent to the interviewees in both companies involved in RE with less than 10 questions in order to confirm our findings for validation of NORM framework. Results: With the information of initiation of NORM framework and using VSM we are able to chart the current decision points (DP) or decisions in the company’s RE process and the decision material that is used for each DP. We then have investigated what decision material is just enough, and when do a company need to produce it so that it is ready when the decision should be taken. We have looked at things such as waiting times, utilization and usefulness of produced decision material, and finally it is suggested to companies how their RE decision process in MDRE environment can be improved. Conclusions: Interviewees provided us the positive feedback on NORM, and they liked our novel research work in the form of NORM framework. Interviewees felt that the provided NORM structure of presenting pre-project decisions and its steps of identifying Appropriate Decision Material (ADM) is useful and usable, scalable and is according to industry relevance. It is concluded that the validation of NORM framework achieved positive feedback and results.Blekinge Institute of Technology SE-371 79 Karlskrona Sweden Ph.: +46 455 38 50 0
CONSTRUCTION AND ANALYSIS OF A SALT GRADIENT SOLAR POND FOR HOT WATER SUPPLY
No full textSolar pond technology is being used in this world for the past many years, yet this technology has to prove its effectiveness in energy starved country like Pakistan and resolve energy crisis of the country. This research discusses basic principles of solar pond design, construction of a prototype solar pond, thermal energy extraction from the solar pond and cost benefit analysis of this technology for industrial sector in Pakistan in the form of a case study
Domestic Electrical Load Management Using Smart Grid
No full textAbstractDemand side load management is one of the basic features in smart grid, which enable end users to know major characteristics about their energy consumption during peak and off peak hours and encourage the utility to maintain load demand in extreme conditions. This results in more reliable system with overall improvement of efficiency and low CO2 emission in smart grid. Most of the previous techniques used in demand side load management are specific to traditional energy management strategies with limited number of load controlling technologies. In this paper, we focus on operating the system with more efficiency and reliability. Integration of solar PV distributed generation, smart DC storage and smart load is expected to add valuable operations in the smart grid. Direct load control (DLC) and load shifting techniques for overkill load offers various outcomes during extreme conditions
Hydraulic simulations to evaluate and predict design and operation of the Chashma Right Bank Canal
No full textIrrigation systems / Irrigation canals / Flow control / Velocity / Canal regulation techniques / Hydraulics / Simulation models / Design / Operations / Crop-based irrigation / Distributary canals / Water delivery / Policy / Protective irrigation / Water allocation / Water requirements / Sedimentation / Water distribution / Equity / Water conveyance / Pakistan / Chashma Right Bank Canal
Exploiting the Reconfigurability of ρ-VEX Processor for Real-Time Robotic Applications
No full textAutonomous mobile robots generally have limited computational power on-board, and they have to perform their tasks in real-time in order to interact with their surroundings effectively. Therefore, there is a need to utilize the available computational capabilities efficiently. The ρ-VEX is a run-time reconfigurable VLIW processor. This unique processor allows separation of its issue lanes to form independently operating processing cores. Switching between these configurations during run-time allows optimizing the computing resources for the task(s) it is performing. In this project FreeRTOS is ported to the ρ-VEX processor and a control layer is developed. FreeRTOS manages the applications based on given real time parameters. The control layer decides the number of active cores (hardware contexts) and issue width of each core to best match the processing requirements of the applications. In this way, FreeRTOS and the control layer together can reconfigure the number of active cores at run-time. This is a very unique feature of this thesis project and can not be found in any other multicore implementation of FreeRTOS. The control layer along with FreeRTOS provides the user a facility to run applications under real-time constraints and with the best possible efficiency. In order to evaluate the performance, the overhead of the FreeRTOS is quantified and a performance comparison is made between several configurations of this system. Moreover, impact of reconfigurability of the ρ-VEX on the schedulability of real-time applications is measured and it is concluded that (indeed) reconfigurability of ρ-VEX improves the schedulability of the real-time applicationsElectrical Engineering, Mathematics and Computer ScienceComputer Engineerin
Landslide Distribution Analysis and Susceptibility Mapping: A Case Study from Haveli District, Pakistan
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