Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2731

Table of Content: 18 June 2010; 5(12)

September 2013

Laboratories at the Faculty of Medicine of the University of Coimbra in the XIX century

The beginning of natural sciences came to predominate in medicine with the emergence of natural scientific thinking in the first half of the 19th century. Philosophical approaches became less relevant. Research concentrated on the biological, physiological and chemical foundations of life. Therefore, the creation of laboratories of experimental physiology, histology, toxicology and pathological anatomy was the result of...

Author(s): Maria Burguete

  • Article Number: 462235C17311

September 2013

Policies on population, development and pollution of the Black Sea basin

The Black Sea is a closed basin which is connected to Aegean Sea through Bosporus and Dardanel Straits: The basin is encircled with six countries from which major rivers Danube, Dniester, Dnieper, Yeşilirmak, Kizilirmak and Sakarya run through to the sea, which carry and discharge pollution from industrial, agricultural and domestic sources to Black Sea Basin that grows cumulatively. They discharge into virtually...

Author(s): D. S. Beyazli, Z. Y. Bayram and S. Aydemir

  • Article Number: 7CA3FE517325

September 2013

Wireless attendance management system based on iris recognition

Iris recognition verification is one of the most reliable personal identification methods in Biometrics. With the rapid development of iris recognition verification, a number of its applications have been proposed until now including time attendance system etc. In this paper, a wireless iris recognition attendance management system is designed and implemented using Daugman’s algorithm (Daugman, 2003). This system...

Author(s): Seifedine Kadry and Mohamad Smaili

  • Article Number: 29903A917333

September 2013

Job satisfaction among selected workers in St Lucia, West Indies

The aim of this study was to investigate the level of job satisfaction among supermarket workers. A self administered questionnaire survey was conducted from July-September 2007. Data were collected from 111 supermarket workers in a major supermarket located in Vieux Fort, Saint Lucia. Respondents were asked to complete a 10-item job satisfaction questionnaire. The response rate was 74%. The percentage of satisfied...

Author(s): R. O. Orisatoki and O. O. Oguntibeju

  • Article Number: 706C50D17341

September 2013

Thermo elastic analysis of a functionally graded cylinder under internal pressure using first order shear deformation theory

Thermo elastic analysis of a functionally graded cylinder under mechanical and thermal loads is investigated analytically in the present paper. The first order shear deformation theory (FSDT) is employed for analysis of the problem. FSDT recognizes two components for definition of the deformation. Displacement of the mid-plane and rotation about that are two components of deformation. The modulus of elasticity is...

Author(s): M. Arefi and G. H Rahimi

  • Article Number: AFB1DB917347

September 2013

Estimating soil available nitrogen with a hot H2O2/KCl extraction

Appropriate and simple analysis methods for an accurate estimation of soil N mineralization potential are required to optimize N fertilizer recommendations. We used soils from non-cultivated and cultivated plots in central Côte d’Ivoire to investigate the quantum of ammonium (NH4+) that could potentially be mineralized. The soil was first treated with H2O2 at 60°C for 2, 4, 6 or 8 h (and referred to...

Author(s): T. B. Tié, L. N. Diby, , E. Seyo and A. Assa

  • Article Number: 477362B17356

September 2013

Developing prototype model of discharge planning with CD learning media in Indonesia

Discharge planning (DP) is a crucial part in continuous nursing care and its aim is to prepare the patient and the family to return home. Discharge planning has not been optimally conducted. The study’s purposes are to identify the implementation of discharge planning, to develop an organized discharge planning model and to evaluate the implementation of this model. An action research with triangulation studies...

Author(s): Rr. Tutik Sri Hariyati, Efy Afifah and Hanny Handiyani  

  • Article Number: 8C5B1D517366

September 2013

Prediction of climatic change for the next 100 years in Southern Italy

This study investigates the impact of the expected climate changes in the Apulia region (Southern Italy) for the next 100 years on the climatic water balance variations, climatic classifications and crop water requirements. The overall results indicated that an increase of temperature, in the range between 1.3 and 2.5°C, is expected in the next 100 years. The reference evapotranspiration (ETo) variations would...

Author(s): Burçak Kapur, Steduto Pasquale, Servet Tekin, Mladen Todorovic, S. Metin Sezen, Mete Özfidaner and Zekai Gümüş

  • Article Number: D9ADF7117374

September 2013

Etiologies of patients admitted to emergency department with hypoglycemia

Hypoglycemia is the most common endocrinologic problem seen in emergency departments. To explore its causes in patients who admitted to the emergency department with symptoms resembling hypoglycemia, 225 hypoglycemia cases were evaluated from January 2000 to May 2008. Of 225 hypoglycemia cases, 158 (70.2%) were receiving treatment for diabetes mellitus, which was the most common group (94 patients were using insulin, 55...

Author(s): Sevki Hakan Eren, Haci Mehmet Caliskan, Fatih Kilicli, Ilhan Korkmaz, Fettah Acibucu and Hatice Sebila Dokmetas

  • Article Number: 597EED017384

September 2013

Analysis of missing values in simultaneous linear functional relationship model for circular variables

Missing values arise in many research fields and is a common problem in analysis. Unlike linear data, the methods proposed to handle missing values for circular variables have not been developed. This could be contributed to the closed form of circular variables. An imputation methods based on circular mean by column and sample circular mean are proposed for the simultaneous linear functional relationship model for...

Author(s): S. F. Hassan, Y. Z. Zubairi and A. G. Hussin

  • Article Number: 89CE48517397

June 2010

Influence of mineral additive type on slump-flow and yield stress of self-consolidating mortar

Self-consolidating concrete flow mainly depends on the properties of the Self-consolidating mortar (SCM) design. SCM properties are influenced by mineral powder content, powder (mineral additive) type, and the chemical admixture content used in the mixes. In this study, the effects of mineral additives, the water/powder ratio, and the chemical admixture content on the yield stress of SCM was investigated. Five mineral...

Author(s): Ilker Bekir Topçu and Tayfun Uygunoğlu

  • Article Number: 90FD37517477

September 2013

Variations in alanine aminotransferase and aspartate aminotransferase activities in African catfish: Clarias gariepinus (Burchell, 1822) at different sublethal concentrations of potassium permanganate

Potassium permanganate (KMnO4) is a widely used freshwater aquaculture chemotherapeutant for the treatment and prevention of waterborne parasitic and fungal diseases. The specific objective of this research is to determine its effects on alanine aminotransferase and aspartate aminotransferase activities in the plasma of the widely consumed African catfish, Clarias gariepinus. C. gariepinuswere exposed to...

Author(s): Kori-Siakpere Ovie, Ikomi Robert Bemigho and Ogbe Martin Gbemi

  • Article Number: 0E05DE517492

September 2013

Particle swarm optimization performance on special linear programming problems

Linear programming (LP) is one of the best known optimization problems solved generally with Simplex Method. Most of the real life problems have been modeled as LP. The solutions of some special LP problems exhibiting cycling have not been studied except for the classical methods. This study, aimed to solve some special LP problems, exhibit cycling with Particle Swarm Optimization (PSO) and to show PSO performance for...

Author(s): Pakize Erdoğmuş  

  • Article Number: 42EBD5417506

September 2013

Pre-service mathematics teachers’ conceptions about the relationship between continuity and differentiability of a function

Our purpose in this paper is to investigate and show how pre-service mathematics teachers think about the continuity and differentiability of functions given in the form of both graphical and symbolic  representations and how they link these two basic and important calculus concepts. The study was conducted in two phases. First, the participants were asked to complete several tasks...

Author(s): Adem Duru, Önder Köklü and Elizabeth Jakubowski

  • Article Number: 884941817779

September 2013

Determination of sound transfer coefficient of boron added waste cellulosic and paper mixture panels

When the studies about the effects of noise on the human health were investigated, it was determined that the noise has physiological, pathological, psychological and psycho-social results and affects sense organs, circulatory, respiration, digestion, excretory and nervous systems in terms of physiology. In this research, a sound insulation study was carried out in order to minimize the negative effects of sound on the...

Author(s): Abdulkerim Ilgun, M. Tolga Cogurcu, Celalettin Ozdemir, Erkan Kalipci and Serkan Sahinkaya  

  • Article Number: FEF946017811

June 2010

Is 3D just an addition of 1 to 2 or is it more enhancing than 2D visualizations?

There have been much reports of usefulness as well disadvantages of 3D environments in science teaching and learning when compared with 2D visualizations. The present study investigated the relative effectiveness of 2D and 3D visualizations on Nigerian Senior Secondary One students’ understanding of molecular structure and nomenclature in organic chemistry. Quantitative data were generated using validated...

Author(s): Gazi Mahabubul Alam, O. Kunle Oloruntegbe, A. Temitayo Oluwatelure, E. Monica Alake and A. Elizabeth Ayeni 

  • Article Number: DB03FA617843

June 2010

Multidirectional random wave diffraction in harbours by the placing of submarine pit: A case study

The purpose of this study was to estimate the decreasing effects of diffracted wave fields in-and around selected harbours (Kashima and Soma Harbours) including the region of outer breakwater, when a navigation channel is dredged at the vicinity of the harbour entrance. The wave field in the problem is considered to be in a two dimensional plane, and the configuration of the submarine pit breakwater in the sea bed...

Author(s): Sung-Duk Kim and Ho Jin Lee

  • Article Number: EFD9D9B19179

June 2010

Chemical, morphological and anatomical properties and evaluation of cotton stalks (Gossypium hirsutum l.) in pulp industry

In this study, chemical composition and morphological properties of cotton stalks growing in Turkey were investigated. Typical chemical properties determined were the amount of holocellulose, α-cellulose, cellulose, lignin, ash, silica, solubility of cold and hot water and 1% soda and alcohol–benzene. The holocellulose, α-cellulose, cellulose, lignin contents and solubility of cold and hot water and 1%...

Author(s): Ahmet Tutus, Ahmet Cenk Ezici and Saim Ates

  • Article Number: 9CAABA719201

June 2010

Resistance of olive cultivars to Verticillium dahliae

Seventeen important olive cultivars have been evaluated for resistance toVerticillium dahliae under controlled conditions. One-year-old nursery olive plants were inoculated with cotton defoliating (D) (Mn 16) isolate (VCG1) of V. dahliae.Resistance was evaluated by assessing symptom severity using a 0 - 4 rating scale and estimating the area under disease progress curves. Besides, additional parameters for...

Author(s): M. Sesli, E. Onan, S. Oden, H. Yener and E. D. Yegenoglu

  • Article Number: 3FE4BD819258

June 2010

Secondary school students’ perceptions towards global warming: A phenomenographic analysis

This research was put forth to reveal the analysis of the definitions of secondary school students by qualitative phenomenological research methods about “global warming”. About 166 students at a secondary school in Istanbul participated in the research within 2009 - 2010 academic year, second term. The research datum were obtained by students’ completing the sentence “according to me,...

Author(s): Fatih Aydin

  • Article Number: B03FB8719272

June 2010

The photoelectric effect on graphene

We derive the differential probability of the photoelectric effect realized at the very low temperature of double graphene in the strong magnetic field (The magnetic photoelectric effect). The relation of this effect to the elementary particle physics, nuclear physics and Einstein gravity is mentioned. Our approach is the  nanalogue of the Landau theory of the diamagnetism. Understanding of the photoelectric effect...

Author(s): Miroslav Pardy

  • Article Number: D938D2019297

June 2010

Variations in alanine aminotransferase and aspartate aminotransferase activities in African catfish: Clarias gariepinus (Burchell, 1822) at different sublethal concentrations of potassium permanganate

Potassium permanganate (KMnO4) is a widely used freshwater aquaculture chemotherapeutant for the treatment and prevention of waterborne parasitic and fungal diseases. The specific objective of this research is to determine its effects on alanine aminotransferase and aspartate aminotransferase activities in the plasma of the widely consumed African catfish, Clarias gariepinus. C. gariepinuswere exposed to...

Author(s): Kori-Siakpere Ovie, Ikomi Robert Bemigho and Ogbe Martin Gbemi

  • Article Number: 9E717CC40104