Asmiati,Lampung University |
Baskoro E.T.,Bandung Institute of Technology
AIP Conference Proceedings | Year: 2012
Let G be a connected graph G. Let c be a k-coloring of V(G) which induces an ordered partition Π = S 1,S 2,.,S k of V(G), where S i is the set of vertices receiving color i. The color code c Π(ν) of vertex ν is the ordered k-tuple (d(ν,S 1), d(ν, S 2),., d(ν, S k)), where d(ν, S i) = min d(ν, x)|x ∈ S i, for 1 ≤ i ≤ k. If the color codes of all vertices are different, then c is called a locating-coloring of G. The locating-chromatic number of G, denoted by χ L(G) is the smallest k such that G has a locating k-coloring. In this paper, we investigate graphs with locating-chromatic number 3. In particular, we determine all maximal graphs having cycles (in terms of the number of edges) with locating-chromatic number 3. From this result, we then characterize all graphs on n vertices containing cycles with locating-chromatic number 3. © 2012 American Institute of Physics.
Hermida L.,Universiti Sains Malaysia |
Hermida L.,Lampung University |
Abdullah A.Z.,Universiti Sains Malaysia |
Mohamed A.R.,Universiti Sains Malaysia
Renewable and Sustainable Energy Reviews | Year: 2015
Deoxygenation process of fatty acid as a renewable resource to produce diesel-like hydrocarbons is one of the alternatives to address drastic shortage of crude oil-based fuels in the near future. Catalytic deoxygenation process of fatty acid is getting attention from both academia and industry. Researchers have tried different techniques in the fatty acid deoxygenation to enhance the production of diesel-like hydrocarbons. This review paper elucidates the influence of tmain operating conditions towards achieving optimum yield and selectivity of desired products. The reaction pathways, the reaction kinetics as well as recent progress in deoxygenation of fatty acid for production of diesel-like hydrocarbons are also reviewed. © 2014 Elsevier Ltd. All rights reserved.
Amrizal N.,Lampung University |
Amrizal N.,University of Lleida |
Chemisana D.,University of Lleida |
Rosell J.I.,University of Lleida
Applied Energy | Year: 2013
A hybrid photovoltaic/thermal transient model has been developed and validated experimentally. The methodology extends the quasi-dynamic thermal model stated in the EN 12975 in order to involve the electrical performance and consider the dynamic behavior minimizing constraints when characterizing the collector. A backward moving average filtering procedure has been applied to improve the model response for variable working conditions. Concerning the electrical part, the model includes the thermal and radiation dependences in its variables. The results revealed that the characteristic parameters included in the model agree reasonably well with the experimental values obtained from the standard steady-state and IV characteristic curve measurements. After a calibration process, the model is a suitable tool to predict the thermal and electrical performance of a hybrid solar collector, for a specific weather data set. © 2012 Elsevier Ltd.
Sukmana I.,University of Technology Malaysia |
Sukmana I.,Lampung University
The Scientific World Journal | Year: 2012
The guidance of endothelial cell organization into a capillary network has been a long-standing challenge in tissue engineering. Some research efforts have been made to develop methods to promote capillary networks inside engineered tissue constructs. Capillary and vascular networks that would mimic blood microvessel function can be used to subsequently facilitate oxygen and nutrient transfer as well as waste removal. Vascularization of engineering tissue construct is one of the most favorable strategies to overpass nutrient and oxygen supply limitation, which is often the major hurdle in developing thick and complex tissue and artificial organ. This paper addresses recent advances and future challenges in developing three-dimensional culture systems to promote tissue construct vascularization allowing mimicking blood microvessel development and function encountered in vivo. Bioreactors systems that have been used to create fully vascularized functional tissue constructs will also be outlined. © Copyright 2012 Irza Sukmana.
Kartika T.,Lampung University
Social Sciences (Pakistan) | Year: 2016
Indonesia is a developing country, it also the country with the largest population in Southeast Asia. Most female population the use of cosmetics in everyday life. Unfortunately, many dangerous cosmetic products on the market. In general, dangarous cosmetic products dominated by the dye content is prohibited (red K3, rhodamine), contamination of heavy metals Pb and whitening (mercury). Selling whitening cosmetic products can not be separated from the public perception that beautiful is white. NA-DFC. The National of Drug and Food Agency has attempted to tackle the circulation of these products in the market. This study discusses: use of cosmetics female Indonesian nation; Triple M theory; some research on dangarous cosmetics. The results of this discussion is the mass media (television) take part in instilling the perception that a beautiful woman is white skin, smooth, slim as an advertising model on the face whitening products. Study Triple M theory explains that the mass media (television and web pages BPOM/NA-DFC), social (relationships groups or individuals) and culture (values, habits, perception) is a continuous unitary spawned use dangarous cosmetic products as well overcome. © Medwell Journals, 2016.