Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2753

Table of Content: 4 September; 5(17)

September 2010

Environmental systems engineering: A state of the art review

This paper presented a state-of-the-art review in the field of Environmental Systems Engineering (ESE). The source material of the review consisted of four state-of-the-art approaches to environmental systems engineering in water and waste-water systems and air pollution dating back to the time period between 2004 and 2010. Apart from an analysis of related work, this review provided an overview of applied research...

Author(s): ChangKyoo Yoo, Abtin Ataei, YongSu Kim, MinJung Kim, HongBin Liu and JungJin Lim

September 2010

Optimization of the copolymerization reaction between methylol urea and polyester: Effect of viscosity on some physical properties of the copolymer composite

In our continuous desire to develop a paint binder from amino resin, the effect of urea formaldehyde (UF) viscosity on a copolymer composite derived from the copolymerization reaction between methylol urea (MU) and triethanolamine (TEA) to give methylol urea/triethenolamine copolymer composite (MUT) was investigated. Some physical properties of MUT obtained at different viscosities (4.11 - 255.00 mPa.s) were evaluated....

Author(s): S. A. Osemeahon, I. I. Nkafamiya, D. Haggai and W. O. Medjor

September 2010

Behaviour of stabilised peat: A field study

The aim of this study is to observe engineering behaviour of stabilised peat soil by deep mixing method using various types of binder. A field model study has been conducted to stabilise peat using various types of binder. Various mechanical properties of stabilised peat, like undrained shear strength, unconfined compressive strength and shear strength was determined after 14 days of curing time. Scanning electron...

Author(s): Md. Shahidul Islam and Roslan Hashim

September 2010

Assessment of challenges facing poverty alleviation projects in Vhembe District of Limpopo Province in South Africa

This paper presents findings of a study that assessed the challenges facing 30 stratified random sampled poverty alleviation projects (community gardens, poultry, piggery, bakery and other projects, including juice making, brick making, stone crushing and coffin making) in Vhembe District of Limpopo Province in South Africa. A structured questionnaire was administered to 108 randomly selected beneficiaries of the 30...

Author(s): M. Tshitangoni, A. Okorie and J. Francis

September 2010

Support vector machines to forecast changes in CD4 count of HIV-1 positive patients

There are currently 5.5 million confirmed cases of HIV/AIDS in South Africa. HIV infection can be effectively managed with antiretroviral (ARV) drugs, but close monitoring of the progression of the disease is vital. One of the better surrogate markers for disease progression is the use of CD4 cell counts. Forecasting CD4 cell count will help clinicians with treatment management and resource allocation. The...

Author(s): Yashik Singh and Maurice Mars

September 2010

Experimental and theoretical studies of pressure swing adsorption process to remove H2S from methane in a packed bed

In this research, an experimental study coupled with a mathematical modeling for a modified pressure swing adsorption (PSA) technique is developed. In particular, solid grains are saturated with a liquid selective solvent of NMP (n-methyl-2-pyrolidone) to remove H2S from a gaseous mixture. Since, the solubility of H2S is very sensitive to the partial pressure above the layer of liquid, the saturated sorbent could be...

Author(s): Abolfazl Karimi, Leila Vafajoo, Ali Akbar Safecordi and Mohammad Kazemeini

September 2010

Studies on microorganisms associated with pre-harvest deterioration of guava (Psidium guajava Linn.) fruits

Women form the largest percentage of sellers and buyers in markets all over the world. There are lots of benefits to be derived from guava (Psidium guajava Linn.) fruits but a large percentage of guava fruits produced annually are lost to pre harvest deterioration caused by microorganisms. Four fungal pathogens, Aspergillus niger, Rhizopus sp., Fusarium sp., Penicillium sp. and yeast cells were...

Author(s): A. A. Ajayi, S. C. Yah, G. I. Olasehinde and O. O. Ayepola

September 2010

Toxicity of Calotropis procera latex in pregnant and non-pregnant goats

Experiments were carried out to examine the effect of Calotropis procera latex on pregnant and non-pregnant Nubian goats. In pregnant goats during 2 - 3 months of pregnancy, the latex was given at 0.3 ml/kg/day intra vaginally, the animals showed small amounts of mucus at the vulva and plugs, cried in pain and there was maternal and fetotoxicity on day 3 of the experiment. The toxicity was correlated with...

Author(s): S. M. A. El Badwi and A. O. Bakhiet

September 2010

Effects of 1–MCP (1–methylcyclopropene) and STS (silver thiosulphate) on the vase life of cut Freesia flowers

This study was to determine the effects of 1-methylcclopropene (1-MCP) and silver thiosulphate (STS) treatment on the vase life of Freesia “Cordula” flowers. 1-MCP and STS extended the vase life of florets and spikes of cut -Freesia “Cordula”. The longest spike vase life was also obtained in the 1-MCP (4 nl.l-1 + 3 hours) treatment as 9.06 days, spike vase life of control...

Author(s): Murat Zencirkiran

September 2010

Optimum design of planar beams based on sensitivity analysis

In this study, the size optimization problem of a beam, in which the beam heights are determined along the beam axis, is considered as a shape optimization problem of a plate in plane elasticity. To achieve the shape optimization, different principles such as structural analysis, sensitivity analysis and mathematical programming are interrelated. The ANSYS that is a reliable finite element package programme is used...

Author(s): H. Uysal, N. Asci Demiröz and U. Uzman

September 2010

Determination of recreational demands of the staff and students on central campuses of Çanakkale Onsekiz Mart University

In this study, on-site researches and questionnaires were conducted aiming to determine social, cultural and recreational tendencies of the staff and students of Çanakkale Onsekiz Mart University, their level of participation to current recreational activities and recreational demands. The results of the questionnaire conducted to the randomly selected 467 academic and administrative staff and students on-site...

Author(s): Füsun Erduran and A. Esra Özel Cengiz Sebla KabaÅŸ

September 2010

Organizing against market exploitation in Turkey: An analysis of wholesale markets, trade exchanges and producer organizations

Due to globalization, the actors in the agricultural product markets are changing. In fact, the market share and influence of multinational holdings on price formation is increasing. The strategic struggle involved in sharing the pie can be a source of exploitation of both small and insufficiently organized producers, marketers and the consumer. Efforts to obtain continuity and increase in the market share and unfair...

Author(s): Mevhibe Albayrak

September 2010

Acute brain swelling due to remote epidural hematoma during lateral ventricle tumor resection

We report a very rare case of epidural hematoma, which occurred in the right hemisphere during a left lateral ventricle tumor resection. A 37-year-old female patient underwent elective surgery for removal of a lateral ventricle meningioma. Intraoperatively, the patient suffered from acute brain swelling close half an hour after tumor removal. Numerous measures were taken to reduce the brain swelling. A remote epidural...

Author(s): Lunshan Xu, Minhui Xu, Yongwen Zou, Guangxin Chen and Hong Liang

September 2010

Analysis of factors influencing the efficacy of percutaneous retrogasserian glycerol rhizotomy in patients with idiopathic trigeminal neuralgia

Our study analyzed the factors influencing the efficacy of percutaneous retrogasserian glycerol rhizotomy in patients with idiopathic trigeminal neuralgia. Eleven contributing factors influencing the efficacy of percutaneous retrogasserian glycerol rhizotomy were identified by logistic regression analysis. Among 210 patients receiving percutaneous retrogasserian glycerol rhizotomy, 67 underwent two procedures and 16...

Author(s): Lunshan Xu and Minhui Xu

September 2010

Combined economic emission dispatch solution using genetic algorithm based on similarity crossover

Combined economic emission dispatch (CEED) problem is to schedule the committed generating units outputs to meet the required load demand at minimum operating cost with minimum emission simultaneously. This multi-objective CEED problem is converted into a single objective function using a price penalty factor. In this paper, a novel Genetic Algorithm method based on similarity crossover for solving CEED problem in power...

Author(s): UÄŸur Güvenç

September 2010

Service quality, word of mouth and trust: Drivers to achieve patient satisfaction

The objective of this study was to evaluate the elements of the services provided in Pakistani hospitals (Public and Private) and their contribution to patient satisfaction regarding trust on the service providers. The analysis was based on a survey of patient in public and private hospitals in Islamabad, Pakistan. The data were analyzed through a correspondence analysis which was applied to the results of the 245...

Author(s): Shahbaz Shabbir, Hans Ruediger Kaufmann and Mudassar Shehzad

September 2010

An experimental study on vandalism: Trabzon Parks

Vandalism is an action with social, psychological, spatial and economical aspects that have negative impacts on the environment. Although it seems impossible to eliminate vandalism completely, it is thought that it may be alleviated by some spatial measures. This study is aimed at paradigm of presence and impacts of act of vandalism in open public spaces in the cities and interrogation of the measures that can be taken...

Author(s): Aysel Yavuz and Nilgün KuloÄŸlu

September 2010

Comparative morphological and palynological study on poorly known Asperula serotina and its closest relative A. purpurea subsp. apiculata

Morphological and palynological features were examined in the closely related Turkish endemic taxa Asperula serotina and A. purpurea subsp. apiculata. Their morphological features showed very minor difference such as internodes length and the vein thickness of leaf, however, the seed and pollen characteristics clearly appear to have taxonomic value. The clavate-reticulate seed surface suture...

Author(s): Ersin Minareci, Kemal Yildiz and Ali Cirpici

September 2010

Increasing the reliability of skin detectors

Skin detection is a well-known image processing technique that has been used in many applications such as video surveillance, naked image filters, and face detection. This paper proposes a reliable skin detection method that integrates both color and texture features. To increase the reliability of the skin detection process, neighborhood pixel information is incorporated into the proposed method. Texture features were...

Author(s): Alaa Y. Taqa and Hamid A. Jalab

September 2010

A study on the calibration of stereo photogrammetric systems used in motion analysis

Scientific recording of motion and providing feedback based on the evaluation of the recorded data is an essential element of sport science. Today, motion analysis in sports can only be performed in a laboratory environment. In that case, fine differences specific to sports are lost and limited information can be achieved regarding the factors that bring success. The idea of performing motion analysis in sports by...

Author(s): Ayhan Goktepe

September 2010

Isolation, characterization and outdoor cultivation of green microalgae Botryococcus sp.

Samples of the green, colonial, unicellular microalgae Botryococcus sp. were collected from freshwater ponds in Mahabalipuram, Tamil Nadu, India. Specimens were isolated and examined for morphological features using microscopic and scanning electron microscopic images and was found to be Botryococcus sp. The hydrocarbon analysis of its hexane extracts showed hexadecane (10.15%), heptadecane...

Author(s): C. Dayananda, A. Kumudha, R. Sarada and G. A. Ravishankar

September 2010

Epidemiological study of mountain sickness complicated with multiple organ dysfunction syndrome on the Qinghai-Tibetan Plateau: Report of 103 cases

High altitude-multiple organ dysfunction syndrome (H-MODS) is a serious complication associated with high altitude pulmonary edema (HAPE) and high altitude cerebral edema (HACE). However, its etiological factors remain unclear. The clinical records of 4,095 patients with HAPE and/or HACE hospitalized in 11 hospitalson the Qinghai-Tibetan Plateau in China from 1955 to...

Author(s): Qiquan Zhou, Yongjun Luo, Hong Li, Suzhi Li, Xizhou Zhang, Wei Gao, Bihai Zheng, Dingzhou Yang, Fuyu Liu and Yuqi Gao

September 2010

A potential offer-demand problem in ecotourism: Different perspectives from eco-tourists and indigenous people

One of the most important components of ecotourism is the participation of the indigenous people and this is often defined as a major way in ecotourism’s main purpose. While they are often service providers for visitors, it is sometimes possible to see that they are just the main reason why the area is visited. This study examines the different approaches of eco-tourists and indigenous people to some important...

Author(s): Mustafa Var, Emrah Yalçinalp and Müberra Pulatkan

September 2010

Multimodal face and finger veins biometric authentication

Due to the increase in security requirements, biometric systems have been commonly utilized in many recognition applications. Multimodal has great demands to overcome the issue involved in single trait system and it has become one of the most important research areas of pattern recognition. We present multimodal face and finger veins biometric verification system to improve the performance. We presented multilevel score...

Author(s): Muhammad Imran Razzak, Rubiyah Yusof and Marzuki Khalid

September 2010

Optimizing a supply chain network with emission trading factor

In the supply chain, producers try to plan their raw materials and final products with the production and delivery system for control of their flow, and this planning has to start from the purchase of the raw material for production to the delivery stage. Supply chain management and optimization is a promising aspect of enterprises and an exiting research area. Recently, there is a growing interest in supply chain...

Author(s): T. Paksoy

September 2010

In-situ modification of a road material using a special polymer

The quality of materials used in road infrastructure and the grain size distribution of the materials are very important for road construction works. In many projects, appropriate road materials cannot be found easily around the project area and this increases the cost of projects. In this study, polymer was used as an additive for the improvement of a base material for road infrastructure. Working in the framework of a...

Author(s): Aydin Kavak, Gamze Bilgen and Utkan Mutman

September 2010

Distribution of apocrine sweat glands in Han patients with axillary osmidrosis and its surgical treatments

The present study aimed to detect the distribution range and layer of apocrine sweat gland in Han patients with axillary osmidrosis and to select proper therapeutic regimen. Skin and subcutaneous tissue in axillary region were examined by H&E staining. The location of apocrine sweat gland in skin and tissue of axillary region and its correlation with other skin and tissue were observed under microscope. Axillary...

Author(s): H. Chen, C. X. Li, J. Du, H. Y. Chen and Y. J. Wang

September 2010

Economic effectiveness analyses of potato farms: The case of Erzurum Province, Turkey

The potato (Solanum tuberosum) used as a versatile agricultural product and grown around the world under a wide range of climatic and soil conditions is one of the most important staple food crops in Turkey for local consumption, processing and export. Although its alternative usage fields increased significantly, potato production has continuously decreased in the last years since there are major problems stemming from...

Author(s): Yavuz Topcu, Ahmet Semih Uzundumlu and Irfan Okan Guler

September 2010

The effects of sewage sludge used as fertilizer on agronomic and chemical features of bird’s foot trefoil (Lotus corniculatus L.) and soil pollution

This study was conducted to determine the effects of sewage sludge using fertilizer at different doses (3, 6, and 9 ton da-1) on birds’ foot trefoil yields and chemical features. Residual of some heavy metal (Cd, Pb, Cu and Co) and macro element (K, Ca, Na, S, C and Mg,) concentrations were measured in soils and plants. According to the results of the study, sewage sludge, when applied to the soil with...

Author(s): Veysel Saruhan, Ismail Gul and Isil Aydin

September 2010

Multi-variable PDE model of evaluation for distributed information retrieval

Collection selection and result merging are two major sub-problems in the field of distributed information retrieval (DIR). Computing cost, retrieval precision and retrieval recall are three main evaluation indexes in DIR. This paper develops a multi-variable quantitative partial differential equation (PDE) model, linking collection selection method and result merging method with cost, precision and recall indexes. The...

Author(s): Xiuhong Wang and Shiguang Ju

September 2010

Physical, mechanical and mineralogical properties of ophiolitic rocks at the Yakakayi dam site, Eskisehir, Turkey

This paper presents the physical, mechanical and mineralogical properties of ophiolitic rocks from Yakakayi dam site located 25 km away from the northern part of Eskisehir province. The collected samples were subjected to petrographic analyses and physico-mechanical tests. The most important engineering characteristic of rock material for rock characterization and design is its intrinsic strength, which is directly...

Author(s): E. A. Ozsoy, G. Yilmaz and H. Arman

September 2010

Kinetics and mechanism of oxidation of sugar and sugar alcohols by vanadium pentoxide

The kinetics of oxidation of sugars and sugar alcohols by vanadium pentoxide (V2O5) in acidic medium have been investigated spectrophotometrically under pseudo-first order conditions and over a wide range of experimental conditions. Each reaction was first order with respect to the substrate and oxidant. The kinetic data for the oxidation by V2O5 solution showed that increase in temperature and sugar concentration...

Author(s): H. K. Okoro, and E. O. Odebunmi

September 2010

Malt factor induced flocculation in Saccharomyces uvarum

Tests of fermentability of yeast were carried out with two species of malt; Sympa malt and Nymphea malt, and with their EP (Ethanol Precipitate). Flocculation ofSaccharomyces uvarum was not observed with any of them. However, Flocculation can be induced by the EP from the bark of another specie of malt Trumpf malt. Analysis of the Trumpf malt EP was carried out using paper chromatography, fractionation on de...

Author(s): Fadila Maiza Benabdesselam

September 2010

Pseudoepilepsy among adult Sudanese epileptic patients

This non interventional descriptive study was conducted at El shaab Teaching Hospital during the period of Feb 2004 to Aug 2008, 720 adult Sudanese epileptic patients were included in the study, during the period of the study, 40 non epileptic patients (NES) were seen in the outpatient clinic with abnormal movement and were diagnosed as pseudoepilepsy. Forty (10 M; 30 F) patients with NES, 720 (390 M; 330 F) patients...

Author(s): Abbashar Hussein Mohmad, Mohammed Osman Gadour, Faroug Yassien Omer, Ahmad B. M. Ali, Omer el-Adil, Ahmed Hamad, Amira Sidig Abdulgalil, Esam Mahmoud Ahmad and Mohmad Malk Aldar