1,574 research outputs found
Complexities of Layouts in Three-Dimensional VLSI Circuits
Coordinated Science Laboratory was formerly known as Control Systems LaboratoryNational Science Foundation / DMC 85-19649Joint Services Electronics Program / N00014-84-C-0149Egyptian Educational and Cultural Bureau scholarshi
Process Control of Pink Guava Puree Pasteurization Process: Simulation and Validation by Experiment
Recently, process control has been applied extensively in many food processes include pasteurization process. The purpose is to control and maintain the product temperature at desired value. In order to be able to control the process properly, the model of the process needs to be obtained. This research aims to obtain the empirical model and to determine the best control strategy in pasteurization process of pink guava puree. The PID controller tuned by different tuning methods was simulated using Simulink and closed loop responses were observed. Simulation results revealed that PID controller tuned by minimizing of integral absolute error (IAE) method were satisfactory adaptable in this process in term of faster settling time, less overshoot, smallest values of IAE and ISE that less than 1. Then, experiment was performed using this method in order to validate simulation results. In general, a good agreement was achieved between experimental data and dynamic simulation result in control of pasteurization temperature process with R2=0.83. As the conclusion, the results obtained can be used as the recommendation for a suitable control strategy for the pasteurization process of pink guava puree in the industry
Analytic Lifshitz black holes in higher dimensions
We generalize the four-dimensional R^2-corrected z=3/2 Lifshitz black hole to
a two-parameter family of black hole solutions for any dynamical exponent z and
for any dimension D. For a particular relation between the parameters, we find
the first example of an extremal Lifshitz black hole. An asymptotically
Lifshitz black hole with a logarithmic decay is also exhibited for a specific
critical exponent depending on the dimension. We extend this analysis to the
more general quadratic curvature corrections for which we present three new
families of higher-dimensional D>=5 analytic Lifshitz black holes for generic
z. One of these higher-dimensional families contains as critical limits the z=3
three-dimensional Lifshitz black hole and a new z=6 four-dimensional black
hole. The variety of analytic solutions presented here encourages to explore
these gravity models within the context of non-relativistic holographic
correspondence.Comment: 14 page
Investigation of Air Pollution Impact on Kinta River Water Quality at a Tropical Region
Critical air quality levels lead to an unhealthy environment which disrupts physical activities and human health. Wet deposition of air pollutants might cause a high concentration of water pollution due to rain water washout of nitrate and particulate matter (PM). This study aimed to investigate the impacts of air pollutants deposition on river water quality in Malaysia. The methodology involved in the analysis of secondary data (January to December 2013) for air quality and river water quality using factor, correlation, and regression. Parameters of air quality were PM10, Nitrate (NO3), ozone (O3) and temperature while water quality data were turbidity, Nitrate and PM10 (Ca, As, Hg, Cd, Cr, Pb, Zn, Cl, Fe, K, Mg, Na). The results show that there were positive correlations between air quality indicators and Kinta river water quality parameters. Correlation matrix shows that in terms of turbidity, air and water data were having 96% similarities. Regarding Nitrate concentrations, air and water records had only 30% of correlation matrix, which can be due to other sources of Nitrate which was agriculture activities near Kinta River. The factor analysis results showed that PM was the main contributor to river water quality particles with 94%. © 2020 Published under licence by IOP Publishing Ltd
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Dehydration of potato slices following brief dipping in osmotic solutions: effect of conditions and understanding the mechanism of water loss
A novel variant of osmotic dehydration, named here as post-dipping dehydration – where a material is dipped in a salt or sugar solution for a very short time followed by simple exposure to ambient conditions was explored with the aim of lowering water content of potato slices but at the same time not gain a high level of sugar/salt. The rate of water loss, which was rapid initially, was found to approach equilibrium. This paper also explored whether the water loss process could subsequently be kick started once again, by employing a multi-stage process, where each stage consisted of osmotic solution dipping followed by ambient holding of the potato slices that had reached equilibrium in the earlier stage. Water loss values comparable to conventional osmotic dehydration could be achieved thus, but with significantly lower overall solid gain (less than 50%) – which can potentially yield a significantly healthy product option
Alternative shear reinforcement for reinforced concrete flat slabs
This paper presents the first series of validation tests for a patented shear reinforcement system for reinforced concrete flat slabs. The system, called “Shearband,” consists of elongated thin steel strips punched with holes, which undulate into the slab from the top surface. The main advantages of the new reinforcement system are structural effectiveness, flexibility, simplicity, and speed of construction. Four reinforced concrete slabs were tested in a specially designed test rig. The slabs reinforced in shear exhibited ductile behavior after achieving their full flexural potential, thus proving the effectiveness of the new reinforcement. This paper reviews briefly existing types of shear reinforcement and identifies the need for more efficient and economic solutions. Details of the experimental setup and results are given, including strain and deflection measurements as well as photographs of sections through the slabs. Finally, comparisons are made with the ACI 318 and BS8110 code predictions, which confirm that the system enabled the slabs to avoid punching shear failure and achieve their flexural potential. In addition, both codes are shown to lead to conservative estimates of flexural and punching shear capacities of reinforced concrete slabs
Transformation of Muslim behaviour towards sustainable environment: perspectives of non-governmental organisations in Klang Valley
Man cannot depend solely on science and technology to solve environmental problems. In fact, scholars and environmentalists have observed that some of the causes of environmental deterioration are rooted in science and technology. It is clear that environmental problems need ethical solution. However, environmentally ethical behaviour (EEB) is often overlooked in the life of a Muslim. This behaviour is important, particularly, to ensure the future of civilization of the Islamic world and, generally, civilization as a whole. Given the fact that non-governmental organisations (NGOs) are more sensitive to the transformation of public behaviour compared to other groups, this article discusses the perspectives of Malaysian NGOs on the transformation of Muslim EEB in Malaysia in three aspects: (a) The type of EEB practiced by Muslims in Malaysia; (b) The transformation process of EEB experienced by Muslims in Malaysia; and (c) Whether or not the transformation of EEB of Muslims in Malaysia is motivated by the values advocated by Islam. The research adopted a qualitative research method of data collection, i.e., focus group discussions (FGDs). FGD’s results illustrated that: (a) Pre-cycling, reusing and recycling are the common types of EEB practiced by Muslims in Malaysia; (b) The transformation process of EEB experienced by Muslims in Malaysia is not accelerating at the speed that we hoped for; and (c) The transformation of EEB of Muslims in Malaysia is motivated more by economic and social factors as well as level of education and regulation enforcement compared to the values advocated by Islam
Transformation of Muslim Behaviour towards Sustainable Environment: Perspectives of Non-Governmental Organisations in Klang Valley
Man cannot depend solely on science and technology to solve environmental problems. In fact, scholars and
environmentalists have observed that some of the causes of environmental deterioration are rooted in science
and technology. It is clear that environmental problems need ethical solution. However, environmentally
ethical behaviour (EEB) is often overlooked in the life of a Muslim. This behaviour is important, particularly,
to ensure the future of civilization of the Islamic world and, generally, civilization as a whole. Given the fact
that non-governmental organisations (NGOs) are more sensitive to the transformation of public behaviour
compared to other groups, this article discusses the perspectives of Malaysian NGOs on the transformation
of Muslim EEB in Malaysia in three aspects: (a) The type of EEB practiced by Muslims in Malaysia;
(b) The transformation process of EEB experienced by Muslims in Malaysia; and (c) Whether or not the
transformation of EEB of Muslims in Malaysia is motivated by the values advocated by Islam. The research
adopted a qualitative research method of data collection, i.e., focus group discussions (FGDs). FGD’s
results illustrated that: (a) Pre-cycling, reusing and recycling are the common types of EEB practiced by
Muslims in Malaysia; (b) The transformation process of EEB experienced by Muslims in Malaysia is not
accelerating at the speed that we hoped for; and (c) The transformation of EEB of Muslims in Malaysia is
motivated more by economic and social factors as well as level of education and regulation enforcement
compared to the values advocated by Islam
Bending AdS Waves with New Massive Gravity
We study AdS-waves in the three-dimensional new theory of massive gravity
recently proposed by Bergshoeff, Hohm, and Townsend. The general configuration
of this type is derived and shown to exhibit different branches, with different
asymptotic behaviors. In particular, for the special fine tuning
, solutions with logarithmic fall-off arise, while in the
range , spacetimes with Schrodinger isometry group are admitted
as solutions. Solutions that are asymptotically AdS, both for
Brown-Henneaux and for the weakened boundary conditions, are also identified.
The metric function that characterizes the profile of the AdS-wave behaves as a
massive excitation on the spacetime, with an effective mass given by
. For the critical value , the value of
the effective mass precisely saturates the Breitenlohner-Freedman bound for the
AdS space where the wave is propagating on. The analogies with the AdS-wave
solutions of topologically massive gravity are also discussed. Besides, we
consider the coupling of both massive deformations to Einstein gravity and find
the exact configurations for the complete theory, discussing all the different
branches exhaustively. One of the effects of introducing the Chern-Simons
gravitational term is that of breaking the degeneracy in the effective mass of
the generic modes of pure New Massive Gravity, producing a fine structure due
to parity violation. Another effect is that the zoo of exact logarithmic
specimens becomes considerably enlarged.Comment: 9 pages. Minor typos correcte
A model for two-proton emission induced by electron scattering
A model to study two-proton emission processes induced by electron scattering
is developed. The process is induced by one-body electromagnetic operators
acting together with short-range correlations, and by two-body
currents. The model includes all the diagrams containing a single correlation
function. A test of the sensitivity of the model to the various theoretical
inputs is done. An investigation of the relevance of the currents is
done by changing the final state angular momentum, excitation energy and
momentum transfer. The sensitivity of the cross section to the details of the
correlation function is studied by using realistic and schematic correlations.
Results for C, O and Ca nuclei are presented.Comment: 30 pages, 18 figures, 3 table
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