1,734 research outputs found
Attitudes of College Students towards Agriculture, Food and the Role of Government
In 2002 and 2007 we surveyed Agribusiness students’ attitudes about agriculture, farming, food and agricultural policies. Responses were analyzed by year and student characteristics including farm background, citizenship and gender. Citizenship was a significant variable explaining differences in agreement with statements. Year and interactions with year were not significant.agricultural policy, farming, logistic regression, student attitudes, Agricultural and Food Policy, Teaching/Communication/Extension/Profession, A13, A22, C42, Q18,
Structural Analysis and Finite Element Methods: Modeling and Simulation in Mechanical Engineering
This research dives into the space of "Structural Analysis and Finite Element Methods: Modeling and Reenactment in Mechanical Designing," utilizing a multifaceted approach to comprehensively get the mechanical behaviour of building structures. Finite Element Analysis (FEA) was utilized to scrutinize a steel structure beneath assorted stacking conditions, uncovering stretch conveyances basic for basic optimization. The study amplified its centre to Fluid-Structure Interaction (FSI), unravelling the complex flow between liquid forces and basic reactions, with suggestions for seaward building applications. Warm recreations of composite materials give bits of knowledge into temperature-induced stresses, directing fabric choice and plan alterations in extraordinarily warm situations. Sensitivity investigations and parametric studies methodically investigated plan impacts on auxiliary execution, helping in optimization endeavours. Approval against experimental information guaranteed the precision of numerical recreations, improving their validity
Paillier based Privacy-Preserving Mining of Association Rules from Outsourced Transaction Databases
The Cloud computing is computing in which massive assembling of remote servers are managed to authorized centralized data storage and online access to computer resources , while Privacy-preserving data mining (PPDM) is one of the latest inclination in privacy and security studies. It is determined by one of the important positioning issues of the information era - the right to privacy. With the use of cloud computing services, an organization lack in computational resources can deploy its mining requires to an outsider service provider. However, both the elements and the association rules of the deployed database are observed as private property of the organization. The data owner converts its data and sends it to the server, ships mining queries to the server, and recoup the actual design from the extricate designs received from the outsider server for corporate privacy prevention. In this theory, we study the problems of outsourcing the association rule mining mechanisms within a corporate privacy-preserving framework. The Rob Frugal method is founded with defeat the security obligations of outsourced data. This method is an encryption plan which is based on one to one substitution ciphers for items and fake pattern from the database. In this system attacker discovers data by guessing attack, also man in the middle attack which is possible on Rob Frugal encryption to conquer this problem, the proposed technique encompasses Paillier encryption for enhancing the security level for outsourced data with the less complexity and to protect against the forging the contents of the correspondence. FP-growth algorithm is used for generating association rules for improving the performance and for preserving a homomorphic encryption algorithm Paillier cryptosystem is being used
Effect of retempering with retarding admixture on properties of concrete subjected to prolonged mixing
In situations like delivery of concrete from central mixing plant, in road construction, in constructing lengthy tunnels, in transportation of concrete by manual labor, in hilly terrain long hauling of concrete is required. Loss of workability and undue stiffening of concrete may take place at the time of placing on actual work site1. In such situations engineers at site, many a time reject the concrete partially set and unduly stiffened due to the time elapsed between mixing and placing. Mixed concrete is a costly material and it cannot be wasted without any regard to cost. It is required to see whether such a stiffened concrete could be used on work without undue harm with use of retarding admixtures. The process of remixing of concrete, if necessary, with addition of just the required quantity of water is known as ‘retempering’ of concrete1. Sometimes, a small quantity of extra cement is also added while retempering. In the site sometimes the concrete has to wait for some time to enter in the formwork after it is mixed. This may be due to some break down in the conveyance or quarrel between the labors. In such situations the concrete looses its plasticity. But since the quantity is enormous2, such concrete cannot be wasted. In such situations addition of small quantity of cement and water along with retarding admixture can bring back the plasticity to concrete. Thus retempering becomes important in such odd situations2. In this paper an attempt is made to study the strength characteristics of concrete containing retarding admixture at retempering time of 15min upto 90 min. The tests are conducted to evaluate the strength characteristics of concrete like compressive strength, tensile strength, flexural strength for different retempering times
Capturing an Evolving Nebular Environment: A Petrographic and Geochemical Study of a Type A, B & C CAI
Calcium, Aluminum-rich Inclusions (CAIs) were the first formed solids in our Solar System, with mineral assemblages reflecting the first phases predicted to condense out of a hot nebular gas of Solar composition. Geochemical, textural and crystallographic information in CAIs can be used to constrain the temperature, pressure, and composition (e.g., oxygen fugacity) of the gaseous reservoir(s) from which they formed, as well as any secondary (nebular and parent body) processes they underwent. Coordinated geochemical and textural analyses provide information on nebular conditions (i.e., astrophysical environments and dynamics of nebular gas reservoirs) in which these CAIs formed. In order to better understand the evolution of nebular reservoirs at the time of CAI formation, we analyzed a Type A, B and C CAI using Electron Probe Micro-Analyzer (EPMA) and Electron BackScatter Diffraction (EBSD) at NASA Johnson Space Center (JSC)
Trace Element Abundances in an Unusual Hibonite-Perovskite Refractory Inclusion from Allende
Calcium-aluminum-rich refractory inclusions (CAIs) are thought to be the first-formed solids in the Solar protoplanetary disk and can provide information about the earliest Solar System processes (e.g., [1]). A hibonite-perovskitebearing CAI from the Allende CV3 chondrite (SHAL, [2]) contains a single of 500 micrometers hibonite grain and coarse-grained perovskite. The mineralogy and oxygen isotopic composition of this CAI shows similarities with FUN inclusions, especially HAL [2]. Here we present trace element abundances in SHAL
Review of optimal design of composite structures under uncertainty
This study represents optimization of hollow circular, rectangular and airfoil composite beam by using sub problem approximation method in ANSYS. A three dimensional static analysis of large displacement type has been carried out for hollow circular, rectangular and airfoil composite beams. Weight of beam was objective function, material parameter, geometrical, ply thickness, ply angles and load. In order to validate the results, one loop of simulation is benchmarked from results in literature. Ultimately, best set of optimized design variable is proposed to reduce weight under static loading condition
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