Influence of process parameter on tensile properties of friction stir welded butt joints in 6082 aluminium alloy
Friction Stir Welding, a relatively new welding process, was developed in 1991 at The Welding Institute near Cambridge, England. In this process parts are mated together, rigidly fixtured, and joined in solid-state by forcing a rotating tool into the joint, and traversing that tool along the joint. This process creates weldments with properties comparable to the base metal and in most cases superior to traditional fusion welding techniques. During the Friction Stir Welding (FSW) process, the forging forces under the tool plastically deform the material, “stirring” the material around the tool pin and against the tool shoulder, thus joining the mated parts together. This process induces large shear forces in the plastically deforming material, raising the temperature of the material to approximately 80% of the melting temperature. The FSW process parameters such as tool rotational speed, welding speed, axial force, etc. play a major role in deciding the weld quality. In present investigation, the effect of processing parameters on mechanical properties of AA6082-O joints produced by friction stir welding was analyzed. Different welded specimens were produced by varying rotating speeds of the tool as 900 & 1200 rpm and by varying welding speeds as 50 & 63 mm/min. The FSW joints mechanical properties of the material such as yield strength, tensile strength and percentage of elongation were evaluated by means of tensile tests.
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1972. Intention of students
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Irfana Akram, Fizza Malik and Hazrat Ayesha Sadiqa |
Abstract |
Pdf
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Category : Educational Research | Sub Category : Educational Technology |
Intention of students
The purpose of this study is to determine the university student’s intention toward doing job or business. This study is based on primary data in which data collected from 150 students of different university of Lahore District, Pakistan. We use self administrated approach. The response rate is 86%. 64% of the students decide to do job and 33% decided to start their own business. 80% female are interested to do job, and 54% male willing for job because female are less risk taker rather than male. Female performance more to do a job rather than business because male to do business rather than job.
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Intersectoral competition for land and water policy between users and uses in TamilNadu, India
The national water policy of India is not concomitant with its land use pattern. The countries constituting the SAARC recognise trade and economic relationships among the member countries of Pakistan, Bangladesh, Srilanka, Nepal, Bhutan and Maldives but does not attempt at a comprehensive land and water resources policy for the region. But the rivers flowing in the SAARC region are not confined to national boundaries. In a similar manner no such policy exists among the member states of India. Population growth, unchecked urban migration against limited land and water resources has led to piecemeal and short term approaches to management rather than attempting at holistic global solutions in land and water sharing among the member states of India. For instance in Tamilnadu, water starved state, sharing of waters from the 45 rivers from neighbouring Kerala state has not been successful so far. With the result these rivers originating in Kerala flow waste to Arabian sea. One of the major drawbacks occurring in these exercises is the Tamilnadu has so far been concerned at its own interest in procuring water from Kerala rather than attempting to point out the benefits accruing to kerala which has no space to store the water. Research done in this regard reveal that benefits accruing to Kerala state are substantial in comparison with Tamilnadu.
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Investigation of the relationship between stature and popliteal height sitting of Nigerian bus drivers
The aim of this study was to establish the relationship between the Stature and Popliteal Height Sitting, PHS. 161 male occupational bus drivers were randomly selected for anthropometric characterization of Stature and PHS using standard measuring equipment. The data were analyzed using SPSS 16.0 and Design-Expert 6.0.8. Then regression model was used to estimate PHS. The model shows that there is a linear relationship between the Stature and PHS with coefficient of determination (R2) of 0.8258 (p < 0.0001). The model mitigates time required for gathering anthropometric data. Designers would find this as a huge working tool for adequate productions.
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Japanese quail (Coturnix coturnix japonica) raised on a Deep Litter System in Nigeria: Egg Quality traits
The objective of this study was to determine the internal and external quality characteristics of quail eggs and the effect of egg weight and body size on these traits. For this investigation, one hundred thirty-two eggs were obtained from 120 Japanese quails grown on a deep litter system. Egg Weight (EW), Egg Length (EL), Egg Width (EWT), Yolk Height (YH), Yolk Diameter (YD), Albumen Length (AL), Albumen Height (AH), Yolk Weight (YW), Shell Weight (SW), Shell Thickness (ST), and Albumen Diameter (AD) were all measured, and Egg Surface Area (ESA), Unit Surface Shell Weight (USW), Egg Index (EI), Shell Ratio (SR). According to the findings, age significantly affected egg weight, body weight, yolk diameter, shell weight, egg surface area, and unit surface shell weight (P<0.05). However, all other parameters were not affected by age (P>0.05). Furthermore, increasing egg weight had a negative effect on egg shape index and egg yolk ratio. Most of the internal egg quality traits studied were negatively affected by increasing the eggshell ratio.
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Lecturers view on the adequacy of Physics curriculum contents
This study sought to assess the adequacy and appropriateness of the contents for the attainment of the NCE Physics curriculum objectives. The study covered 24 Colleges of Education and 60 lecturers. Both descriptive and inferential statistical techniques were used to analyze the data gathered in the study. The results showed that the contents of the NCE Physics curriculum are adequate and appropriate for the attainment of the stated objectives. It was recommended that sufficient courses and periods are allocated to practical lessons and laboratory management adequately.
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List of articles published in the month of May 2022
Table of contents for the month of May 2022
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List of articles published in the month of October 2021
Table of contents for the month of October 2021
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Local Binary Pattern for Effective Moving Object Detection and Tracking in Video
Object detection, tracking and recognition currently generated much attention in computer vision community due to their real time applications. The main goal is to detect and track specific instances of an object or broader object classes, such as cars or pedestrians in images sequence. Due The potency of processing video database lies on the search techniques employed in the video processing system. Usage of improper search techniques will make the processing system feeble. This paper proposes unique object detection and tracking system where Local Binary pattern are employed to detect moving object and track them in successive frames. Detecting a specific object from video suing Local Binary Pattern is more suitable when, objects information is not available. Initially, the database video clips are segmented into diverse shots before the feature extraction process. The proposed system comprises two stages: (i) feature extraction and (ii) tracking of object in the video clips. In the feature extraction stage, the color feature is extracted first based on the color quantization. Next, the edge density feature is extracted for the objects present in the query video. Subsequently, the texture feature is extracted using LGXP (local Gabor XOR patterns) technique. Eventually, the object is detected based on those features extracted and the detected object is tracked by utilizing both forward and backward tracking method. The proposed methodology is proved to be more effectual and precise in object detection and tracking.
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Looking through the Eyes of the Cognitive Impaired in Ghana – the Creative Connections and the Expressive Arts in Context
This paper takes a closer look at how the components of the Expressive Arts; dance, drama, music, visual art etc., disclose enormous potential in effecting positive attitudinal and behavioral change in its users. This research explores creativity, as a potential for change in three different special needs Schools in Ghana. The study also juxtaposes the creative connections of Rogers, (2004) with the Expressive Arts to attain thriving results. The Expressive Arts are therefore potential teaching tools for intervention to achieve change and transformation in these users. In these creative processes, the children are encouraged to develop their artistic potentials regardless of their intellectual shortfalls to allow development to proceed so that, the innate latent capacities of these special needs children are extracted and improved raptly to achieve healing, empowerment and self- development.
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