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Environmentally sustainable affordable design elements in housing in the context of Malaysia: Focus on middle income group
No full textSustainability is an integral part of any development in today\u27s world and built-environment is no exception. However, sustainability is not always associated with the issue of affordability. When it comes to housing, where different income groups are involved in large scale, it is utterly significant to consider affordability issues. The objective of this study was to identify environmentally sustainable elements of housing in the context of the hot-humid climate in Malaysia, which can simultaneously be affordable to a significantly rising middle class people in the country. Through a systematic review process the most authentic literatures in the field were reviewed in order to identify environmentally sustainable passive and active elements in the particular context of Malaysia. However, theoretical investigation was non-conclusive to determine affordability of few passive and active elements. A market study, including interviews with contractors was carried out in order to assign the market price of these elements. A 5-point Likert scale questionnaire survey was then conducted on a sample of middle-income groups selected through conditional sampling method. After statistical verification, results showed that several user-controlled passive and active elements were not affordable. The aim of the study was to provide a list of environmentally sustainable and affordable building elements, which could help developers to deliver a better sustainable affordable built environment
What Works in Treating Juveniles with Substance Abuse Problems, Mental Health Issues, or Co-Occurring Disorders
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Analytic Solution for the Drainage of Sisko Fluid Film Down a Vertical Belt
Get PDFThis paper deals with the drainage of Sisko fluid film down a vertical belt. It provides an approximate solution of the resulting non-linear and inhomogeneous ordinary differential equation using perturbation method (PM) and Adomian decomposition method (ADM). Comparison of the results obtained by both methods demonstrate that these series solutions are strictly identical but ADM is easy to compute and can be extended to any higher order. The important physical quantities like velocity profile, volume flow rate, average film velocity, shear stress, force exerted by the fluid film and vorticity vector are derived. The effects of fluid behaviour index, Stokes number and Sisko fluid parameter on some of these physical quantities are observed. Furthermore, we also made a comparison between the Sisko fluid film and Newtonian fluid film
Application of the optimal homotopy asymptotic method for solving the Cauchy reaction-diffusion problem
Get PDFIn this paper, the optimal homotopy asymptotic method is applied on the Cauchy reaction-diffusion problems to check the effectiveness and performance of the method. The obtained solutions show that the OHAM is more effective, simpler and easier than other methods. Moreover, this technique does not require any discretization or linearization and therefore it reduces significantly the numerical computations. The results reveal that the method is explicit
A Subdivision-Regularization Framework for Preventing Over Fitting of Data by a Model
Get PDFFirst, we explore the properties of families of odd-point odd-ary parametric approximating subdivision schemes. Then we fine-tune the parameters involved in the family of schemes to maximize the smoothness of the limit curve and error bounds for the distance between the limit curve and the kth level control polygon. After that, we present the subdivision-regularization framework for preventing over fitting of data by model. Demonstration shows that the proposed unified frame work can work well for both noise removal and overfitting prevention in subdivision as well as regularization
Spread of Malicious Objects in Computer Network: A Fuzzy Approach
Get PDFWe propose an e-epidemic fuzzy SEIQRS (Susceptible-Exposed-Infectious-Quarantine- Recovered-Susceptible) model for the transmission of malicious codes in a computer network. We have simulated the result for various parameters and analyzed the stability of the model. The efficiency of antivirus software and crashing of the nodes due to attack of malicious code is analyzed. Furthermore, initial simulation results illustrate the behavior of different classes for minimizing the infection in a computer network. It also reflects the positive impact of anti-virus software on malicious code propagation in a computer network. The basic reproduction number R0 f and its formulation is also discussed
Reducibility of Eulerian Graphs and Digraphs
Get PDFIn this paper the concept of reducibility in graph theory is discussed, and the deletable vertex (edge) in graph (digraph) is defined. The class of graphs (digraphs) ℛ is called vertex (edge) reducible if for any G∈ ℛ either ℛ is the trivial graph (null graph) or it contains a vertex (edge) v such that G-v∈ ℛ. We introduce some classes of graphs (digraphs) which are reducible and others which are not. The vertex reducibility and edge reducibility of Eulerian graphs and Eulerian digraphs have also been studied
Molybdopterin biosynthesis: Trapping an unusual purine ribose adduct in the MoaA-catalyzed reaction
No full textMoaA/MoaC catalyze a remarkable rearrangement reaction in which guanosine-5′-triphosphate (GTP) is converted to cyclic pyranopterin monophosphate (cPMP). In this reaction, the C8 of GTP is inserted between the C2′ and the C3′ carbons of the GTP ribose. Previous experiments with GTP isotopomers demonstrated that the ribose C3′ hydrogen atom is abstracted by the adenosyl radical. This led to a novel mechanistic proposal involving an intermediate with a bond between the C8 of guanine and C3′ of the ribose. This paper describes the use of 2′,3′-dideoxyGTP to trap this intermediate. © 2013 American Chemical Society
In vitro reconstitution of the radical S-adenosylmethionine enzyme MqnC involved in the biosynthesis of futalosine-derived menaquinone
No full textThe radical S-adenosylmethionine enzyme MqnC catalyzes conversion of dehypoxanthine futalosine (DHFL) to the unique spiro compound cyclic DHFL in the futalosine pathway for menaquinone biosynthesis. This study describes the in vitro reconstitution of [4Fe-4S] cluster-dependent MqnC activity and identifies the site of abstraction of a hydrogen atom from DHFL by the adenosyl radical. © 2013 American Chemical Society