Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2738

Table of Content: 16 January; 7(2)

January 2012

Potential bioactive property of Polygonum minus Huds (kesum) review

In recent years, the bioactive properties of medicinal plants have been attracting the attention of scientists. Polygonum minus Huds is a traditional Malaysian plant that has been used in the treatment of digestive disorders. Several researchers have reported that P. minus Huds contains a high level of antioxidants, flavonoid and phenolic compounds which contain several bioactive properties. To...

Author(s): Suhailah Wasman Qader, Mahmood Ameen Abdulla, Lee Suan Chua and Salehhuddin Hamdan

January 2012

A review of risk factors, incidence and solutions for hepatocellular carcinoma

Liver cancer is one of the cancers that associated with high mortality rate. Incident of liver cancer always correlate with unhealthy life style, food contaminant (such as aflatoxin) and most importantly hepatitis virus infection. High mortality rate of liver cancer can be contributed by late detection of the disease, resistant of the liver cancer cell toward chemotherapy and inhibition of body immune system. The...

Author(s): S. K. Yeap, S. Tamilselvan, M. Al-Qubaisi, Abdul-Rahman Omar, W. Y. Ho, B. K. Beh and Noorjahan B. Alitheen

January 2012

Potential utilization of cassava pulp for ethanol production in Indonesia

Cassava is one of the major crops produced in Indonesia. Cassava grows in all provinces in Indonesia. In the last decade, even though cassava plantation area is decreased, cassava production and its productivity in Indonesia have been on the increase steadily. The tendency of using cassava for ethanol production would affect supply of cassava for food. Cassava pulp, a by- product of tapioca industry is one of the...

Author(s): Euis Hermiati, Djumali Mangunwidjaja, Titi C. Sunarti, Ono Suparno and Bambang Prasetya

January 2012

Inter-generic grafting in watermelon for managing Meloidogyne species: A review

Watermelon (Citrullus lanatus) cultivars suffer considerable yield losses from infection by the root-knot nematodes due to the unavailability of nematode-resistant genotypes. Screening for nematode resistance within the family Cucurbitaceae demonstrated that wild watermelon (Cucumis africanus) and wild cucumber (C. myriocarpus) were highly resistant to Meloidogyne incognita races 2 and 4 and M. javanica,...

Author(s): Kgabo Martha Pofu, Phatu William Mashela and Hussein Shimelis

January 2012

Fuzzy controlled multi-hop adaptive clustering (FMAC) for mobile ad hoc networks

To mimic the operations in fixed infrastructures and to solve the routing scalability problem in large ‘mobile ad hoc networks’, forming clusters of nodes has been proven to be a promising approach. However, when existing weighted clustering algorithms calculate each node’s weight, they either consider only one metric or rely on some metrics collected from extra devices. This often leads to a higher...

Author(s): Anuradha Banerjee and Paramartha Dutta

January 2012

A different approach to the set of fuzzy numbers

In this paper, we showed that every element of the set F of all fuzzy numbers can be abstractly considered as an element of the nonseparable and nonreflexive Banach algebra . Banach lattice structure of  is also investigated according to a partial order we defined.   Key words: Fuzzy numbers, Banach space.

Author(s): Danyal SOYBAŞ and F. Berna BENLI

January 2012

Fifth order two-stage explicit Runge–Kutta–Nyström method for the direct integration of second order ordinary differential equations

In this paper a direct integration of second-order Ordinary Differential Equations (ODEs) of the form , , , using the Explicit Runge-Kutta-Nyström method with higher derivatives is presented. Various numerical schemes are derived and tested on standard problems. The higher-order explicit Runge-Kutta-Nyström (HERKN) method given in this paper is compared with the conventional Explicit Runge...

Author(s): S. A. Okunuga, A. B. Sofoluwe, J. O. Ehigie and M. A. Akanbi

January 2012

Investigation of water absorbency and color fastness of modal woven towels

Water absorbency and color fastness to perspiration, seawater and washing of modal terry woven fabrics were studied in this research. Weft and warp yarns were produced from 100% cotton and pile yarns were produced from 50/0% modal/cotton blended yarn. Terry woven fabrics were produced in five different pile heights. Water absorbency and color fastness tests were carried out on fabrics. It was determined that sinking...

Author(s): Filiz SEKERDEN

January 2012

Exact complexiton soliton solutions for nonlinear partial differential equations in mathematical physics

In this article, the extended multiple Riccati equations expansion method has been used to construct a series of double soliton- like solutions, double triangular function solutions and complexiton soliton solutions for some nonlinear partial differential equations in mathematical physics via the (2+1) dimensional breaking soliton equations, (2+1) dimensional painleve integrable Burger's equations and (2+1)...

Author(s): Khaled A. Gepreel, and A. R. Shehata

January 2012

Virtual reality adoption capability in Malaysian automotive manufacturing industry

Virtual reality and three-dimensional modelling technologies are mainly used in industry in many aspects. The automotive industry is considered as the initial group that uses virtual reality technologies. However, without adopting advanced technology, the automotive industry cannot compete with its global competition. In this study, six automotive companies in Malaysia were selected as case study to verify the virtual...

Author(s): Maryam Mousavi, Faieza Abdul Aziz and Napsiah Ismail

January 2012

The alterations of tyrosine and tryptophane residues along with the evolution of tumor: Determination by synchronous fluorescence spectra

Synchronous fluorescence spectra were applied to assess tyrosine (Tyr) and tryptophane (Trp) residues in the plasma of patients with hepatocellular carcinoma, tumor-bearing mice and in cultured cells (HepG2 and L-02). The results showed for the first time that the fluorescent intensities of Tyr and Trp residues increased significantly in the plasma proteins of patients suffering hepatocellular carcinoma. There is a...

Author(s): Ming Han, Zhexuan Lin, Yuan Zhang, Lin Peng and Yaowen Chen

January 2012

1Emergency Department of Second Affiliated Hospital, Shantou University Medical College, Shantou, China. 2Central Laboratory, Shantou University Medical College, Xinling Road 22, Shantou, Guangdong 515041, China. 3Clinical Laboratory of Affiliated Tumor Hospital, Shantou University Medical College, Shantou, China. 4Central Laboratory, Shantou University, Shantou, China.

Recently, faster and energy saving propeller have become the focus of attention in the marine industry. Furthermore, changeability of the blade is also taken into account for faster replacement and repair works. The objective of the paper is to present the error assessment of the designed Autonomous Underwater Vehicle(AUV) propeller blade. The paper briefly discusses the design steps involved including optimization...

Author(s): A. B. Abdullah, S. M. Sapuan, Z. Samad, H. M. T. Khaleed and N. A. Aziz

January 2012

An efficient quantum-dot cellular automata full-adder

The most important mathematical operation is addition. Other operations such as subtraction, multiplication and division are usually implemented by adders. An efficient adder can be of great assistance in designing arithmetic circuits. QCA is a promising technology which seems to be a good candidate for the next generation of digital systems. So, an efficient QCA full-adder will facilitate creating QCA computational and...

Author(s): Sara Hashemi, Mohammad Tehrani and Keivan Navi

January 2012

A systematic procedure for analysis of third-order charge pump phase-locked loop (PLL)

This paper represents a simple and easy to learn method for analysis and design of third-order charge pump phase-locked loop (PLL) and provides analytical equations for calculating the desired specifications such as phase margin (PM), damping ratio and small signal settling time. The proposed method is based on dominant pole approximation. In other words, this method is based on the approximation of the transfer...

Author(s): Habib Adrang

January 2012

GIS analysis of the accuracy of Tomas Lopez´s historical cartography in the Canary Islands (1742 - 1746)

The accuracy of Tomás López´s historical cartography of the Canary Islands included in the “Atlas Particular” of the Kingdoms of Spain, Portugal and Adjacent Islands” is analyzed. For this purpose, we propose a methodology based on Geographic Information Systems (GIS), a comparison of digitized historical cartography population centres with current ones. This study shows that the...

Author(s): Francisco Manzano-Agugliaro, Josefina Martínez-García and Carlos San-Antonio-Gómez

January 2012

Interface design and netizen behavior of immediate communication software

As Taiwan is becoming more networked coupled with the use of Instant Messaging (IM) which is becoming increasingly popular, instant messaging has become the most popular online activity. The emergence of instant messaging software is used for connecting the relationship between people. However, a combination of interface design with the changing times and the function of instant messaging software and development are...

Author(s): Pei-Yin Chung, Ying-Hsiu Chen, Cheng-Wu Chen, and Chin-Jui Chang

January 2012

Design of an almost continuously controlled three-phase static VAR compensator for power factor correction purposes

In this paper, a three-phase four-wire automatic power factor correction system is designed and tested. This system employs three-phase Wye-connected thyristor switched-capacitor banks to generate a controllable static VAR. Each capacitor bank is constructed of five binary weighted thyristor switched-capacitors. This arrangement leads to a capacitor bank capable of generating stepping reactive power having thirty one...

Author(s): Abdulkareem Mokif Obais and Jagadeesh Pasupuleti

January 2012

Demulsification of water-in-oil (W/O) emulsion via microwave irradiation: An optimization

The formation of water-in-crude oil emulsion creates many problems in petroleum industry such as decreasing the oil recovery efficiency, high pumping cost, and piping corrosion, which needs to be treated before processing. Microwave irradiation was employed to demulsify the water-in-oil (W/O) emulsion, which encountered in refinery industries. Three types of crude oils consisted of heavy and light crude oil used in this...

Author(s): Abdurahman H. Nour, A. N. Ilia Anisa and Azhari H. Nour

January 2012

A review of modeling errors and control for time-delay systems utilizing the LDI criterion

Nonlinear systems sometimes suffer from modeling errors which could potentially result in instability and reduce the control performance of the actual systems. This paper reviews some previous research studies examining the sources of these errors and how to deal with them. In this work, a fuzzy Lyapunov function is defined through fuzzy blending quadratic Lyapunov functions to avoid conservatism in the stability...

Author(s): Pei-Yin Chung, Han-Chung Yang, Cheng-Wu Chen, and Chin-Jui Chang

January 2012

Support vector regression and rule based classifier comparison for power quality diagnosis

This paper presents a comparative study for performing automated power quality diagnosis using rule base classifier (RBC) and support vector regression (SVR) to identify the causes of short duration voltage disturbances such as voltage sag and swell. In the proposed power quality diagnosis method, a time frequency analysis technique called the S-transform was used to analyse and extract features of voltage disturbances...

Author(s): Azah Mohamed, Mohamed Fuad Faisal and Hussain Shareef