Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2767

Table of Content: 30 October; 6(25)

October 2011

A self organizing map (SOM) guided rule based system for freshwater tropical algal analysis and prediction

This paper describes the feasibility study of applying a hybrid combination of Kohonen self organizing feature maps (SOM) and a rule based system in predicting the biomass of selected algae division (Chlorophyta) at tropical Putrajaya Lake (Malaysia). The system was trained and tested on an over five years of limnological time-series data sampled from Putrajaya Lake. Results from trained SOM were used to extract rules...

Author(s): M. Sorayya, S. Aishah, B. Mohd. Sapiyan and S. A. Sharifah Mumtazah

October 2011

Study of drought stress on agronomic traits of winter canola (Brassica napus L.)

Drought and opportune water use is too important for water saving and high yield product. In order to investigate drought stress on agronomic traits of winter canola, experiment was carried out in 2005 to 2006 crop season. Using two treatments and three replicates, in which irrigation remained as the main factor in seven levels and the two secondary factors consisting of Zarfam and Opera varieties. The results...

Author(s): Hossein Bagheri and Shahzad Jamaati-e-Somarin

October 2011

Estimation of D-amino acid oxidase gene expression in different organs of drought-challenged maize

To enhance our exploitations in plant system of D-amino acids oxidizing enzymes (D-amino acid oxidases; DAAO), our efforts were made to unravel the relative expression patterns of maize DAAO transcript using basic and quantitative reverse transcription and polymerase chain reaction (RT-PCR) with template materials collected separately from three different organs of test plants grown under drought stress conditions....

Author(s): Ashraf Gholizadeh

October 2011

Clinically relevance of ectopic bone formation to the structure of TGF- β superfamily in stress condition

Formation of bone outside the skeletal system which can occur in all kinds of soft tissues is called Ectopic or Heterotopic Ossification (HO). It is the abnormal formation of true bone within extra skeletal soft tissues. The TGF-β super family several physiological processes are mediate by these polypeptides such as regulates bone formation and resorption as well as osteoclasts differentiation and survival is...

Author(s): Babak Khalili Hadad

October 2011

Glycemic index of Iranian rice

The glycemic index (GI) is an important parameter of food quality which compares the hyperglycemic effect of a tested meal with pure glucose. For most foods in the Middle East, the glycemic index has not been defined yet. The aim of this study is to determine the GI of Iranian rice and to evaluate the type of cooking method on GI value. To determine the GI, measured portions of food containing 50 g of carbohydrates were...

Author(s): Karim Parastouei, Mohammad Esmaiel shahaboddin, Mitra Motalebi, Seyyed Mehdi Mirhashemi, Ali Mohammad Faraji and Fariba Seyyedi

October 2011

Non-cell metastasis of malignant tumor: A preliminary experiment

The present study aimed to investigate the non-cell metastasis of malignant tumor (metastasis at the molecular level). Primers for the specific SPY gene of male mouse were designed and used to detect the SPY gene in the Lewis lung cancer (LLC) cells by PCR; LLC cells were inoculated into females C57BL/6 mice. H and E staining was performed to detect the subcutaneous primary tumor and metastatic tumors in the lungs and...

Author(s): Gang Xiong, Wu-jun Wang, Na Zhang, Ruijun Cai, Kaichan Cai and Zhiyong Huang

October 2011

Hard dental tissue lesions in inhabitants of an industrial zone

The aim of this epidemiological study was to determine the level of hard dental tissue lesions in an air-polluted environment, as well as to evaluate, as one of the factors, the impact of the environment on the occurrence of these lesions and their frequency. An epidemiological study was conducted in the city of Pancevo, which is is one of the most powerful industrial centers in Serbia. 160 patients of both sexes...

Author(s): Veljko Kolak, Irena Melih, Dragana Pesic, Ivan Mileusnic, Tamara Ristic, Djordje Pejanovic, Milica Popovic, Desanka Cenic-Milosevicand Ankica Jakovljevic

October 2011

Influences of a novel henequen fabric structure on the mechanical properties of a polymeric composite

This study discusses the effect of quantity and stacking sequence of two different woven henequen fabrics on the mechanical performance of henequen/epoxy composites. Tensile and flexural properties of the composites were improved when the modified woven fabric was used, which is ascribed to the increase in adherence between fiber-matrix at the knots of fibers in this fabric, providing a...

Author(s): S. Sampieri-Bulbarela, A. Manzano-Ramírez, J. L. Reyes-Araiza, M. S. Muñiz Villareal, J. R. Gasca-Tirado, L. M. Apátiga, H. Savastano Junior ,  and A. Marroquín de Jesús

October 2011

Applicability of excavatability classification systems in underground excavations: A case study

In this study, applicability of the excavatability classification systems in underground excavations is investigated. For this purpose, the entrance portal of the Konakönü (Araklı-Trabzon) tunnel, excavated in volcanic rocks within the scope of Black Sea coastal highway project, is chosen as pilot study area. The entrance portal of tunnel is excavated through the rocks of Eocene-aged Kabaköy...

Author(s): Ayberk Kaya, Fikri Bulut and Selçuk AlemdaÄŸ

October 2011

The research of quadtree search algorithms for anti-collision in radio frequency identification systems

Nowadays, Radio Frequency Identification (RFID) systems are widely used in commercial applications such as warehouse management, artificial intelligence, intelligent robot and automation control to identify the tagged goods or materials. When there is the existence of multiple tags in the interrogation field of a transponder, the arbitration algorithm for RFID system is used to arbitrate all the tags to avoid the...

Author(s): Bih-Yaw Shih, Ta-Wei Lo and Chen-Yuan Chen,

October 2011

The effect of end season drought stress on the chlorophyll content, chlorophyll fluorescence parameters and yield in maize cultivars

The drought is the most important limiting factor of the agricultural plants production in Iran and the world. Much of the Iranian lands are classified as arid and semi arid areas. To evaluate the effect of drought stress of the last season in 2007 to 2008 on the chlorophyll fluorescence, chlorophyll content of leaf and having the tolerance of five maize genotypes, this experiment was done in a randomized complete block...

Author(s): Roza Gholamin and Majid Khayatnezhad

October 2011

Dynamic bit vectors: An efficient approach for mining frequent itemsets

There are two common kinds of data formats to be adopted in data mining. One ishorizontal, and the other is vertical. Approaches based on vertical data formats havethe advantages of requiring a fewer number of database scans and computingitemset supports fast. One of the vertical data representations, bit vector, has recently been...

Author(s): Bay Vo, Tzung-Pei Hong,  and  Bac Le

October 2011

Effect of induced emotions on strength in older people

The aim of this study was to determine if induced emotions could improve strength in older people. The importance is that, this could have an impact on life quality. A total of 42 volunteers (24 female and 18 male) with a mean age of 62.18 years (SD = 4.31)from Madrid participated in this study. Participants joined an eight-week program of 45 minutes of weight lifting in machines three times per week. They were...

Author(s): Gema Sáez Rodríguez, and Antonio J. Monroy Antón,

October 2011

A new fuzzy mathematical model for multi criteria decision making: An application of fuzzy mathematical model in a SWOT analysis

Analysis of strengths, weaknesses, opportunities and threats (SWOT) is a method to formulate the strategy. Although the SWOT analysis successfully provides the key factors of the problem, it has some drawbacks in selecting appropriate strategy for the evaluation and final decision steps. During recent years, some multiple criteria decision making (MCDM) remove some of these deficiencies, but the nature of these decision...

Author(s): Dragan Pamučar, Goran Ćirović, Dragoljub Sekulović and Aleksandar Ilić

October 2011

Simplified synchronization criteria for complex dynamical networks with time-varying delays

This paper proposes new delay-dependent synchronization criteria for complex dynamical networks with time-varying delays. By constructing a suitable Lyapunov-Krasovskii's functional and utilizing Finsler's lemma, a novel synchronization criterion for the networks were established in terms of linear matrix inequalities (LMIs) which can be easily solved by various effective optimization algorithms. Numerical...

Author(s): M. J. Park, O. M. Kwon, Ju H. Park, S. M. Lee and E. J. Cha

October 2011

Cytoprotective effects of Bauhinia purpurea leaf extract against ethanol-induced gastric mucosal ulcer in rats

Bauhinia purpurea is a medicinal plant commonly used traditionaly in the treatment of many ailments. The present study was undertaken to evaluate the protective effect of ethanolic extracts of B. purpurea ethanolic leaf extract (BPELE) against absolute ethanol-induced gastric mucosal damage in experimental rats. The rats were divided into four groups, respectively pre-treated orally with...

Author(s): Ismail Ibrahim Latif

October 2011

Lung uptake of gold nanoparticles after intraperitoneal administration in vivo: Fluorescence study

Gold nanoparticles (GNPs) have potential applications in cancer diagnosis and therapy, drug delivery and food industry. Some studies indicate that certain nanoparticles (NPs) may cause adverse effects because of their small size and unique properties. However, little is known about the particle-size and exposure duration of intraperitoneal administration of GNPs in the rat lung tissue in vivo. The aim of the...

Author(s): Mohamed Anwar K. Abdelhalim

October 2011

Power line enhancement for data monitoring of neural electrical activity in the human body

Distance and real-time data monitoring are the necessary condition that makes any system in good working order. Recent advancements in micro-electronics and wireless technology enable the application of wireless sensors in both industry and wild environments. However, Long-distance wireless communication has several drawbacks like limited bandwidth, considerable costs and unstable connection quality. Therefore, Power...

Author(s): Ahmed M. A. Haidar, Sridhathan C, Abdulsalam Hazza and Ahmed Saleh

October 2011

Field performance evaluation of mechanical weeders in the paddy field

The field performance of four types of mechanical rice weeders including, single row conical weeder (W1), two rows conical weeder (W2), rotary weeder (W3) and power weeder (W4) was compared to hand weeding (W5). Two transplanted local and improved rice varieties namely Hashemi and Hybrid, respectively were selected for this study. The results revealed that among the mechanical weeders, the highest weeding...

Author(s): Mohammad Reza Alizadeh

October 2011

Aero-microbiological study on distribution pattern of bacteria and fungi during weekdays at two different locations in urban atmosphere of Gwalior, Central India

The concentration and quality of microbes in urban atmosphere may affect human health and environment. In recent years, interest in air microbiology has been focused on air sampling strategies, indoor-outdoor distribution of microbes and climatic influences on microbial population. The weekdays distribution of aeromicrobial load at public places is not well established. Moreover, the research on airborne bacteria is...

Author(s): Pramod Kumar, Pawan Mahor, A. K. Goel, D. V. Kamboj and Om Kumar

October 2011

CTM4 model using Ishikawa diagram for quality management in design-and-build projects

In the demand for improved procurement methods, the design-and-build approach has become prevalent in the construction industry as a fast track strategy. However, the quality issues in design-and-build projects raise the alarm for attention. Competency of project managers in quality management of design-and-build projects may be questionable so that success is hard to achieve. This research intends to identify issues in...

Author(s): Hamzah Abdul-Rahman, Chen Wang and Calvin Jackson

October 2011

CTM4 model using Ishikawa diagram for quality management in design-and-build projects

In the demand for improved procurement methods, the design-and-build approach has become prevalent in the construction industry as a fast track strategy. However, the quality issues in design-and-build projects raise the alarm for attention. Competency of project managers in quality management of design-and-build projects may be questionable so that success is hard to achieve. This research intends to identify issues in...

Author(s): Hamzah Abdul-Rahman, Chen Wang and Calvin Jackson

October 2011

Impacts of pedometer determined physical activity on biochemical risk factors of the cardiovascular system

Physical activity (PA) volume is an important element in maintaining health and functional ability in the population and has a useful effect on lipid profile. Walking is a preferred choice and as a current movement pattern in PA and several social jobs. The aim of this present study was to evaluate the effects of daily number of steps on the blood lipid profile in middle age men. Daily steps volumes were measured in the...

Author(s): Majid Jalili, Farzad Nazem and Ali Heydarianpur