Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2740

SRE Articles

Effects of biochar and manure on soil properties and growth of Casuarina equisetifolia seedlings at the coastal region of Kenya

August 2020

This study investigated the effects of biochar and manure applied singly or together on soil biochemical properties, Casuarina equisetifolia seedling growth and seedling quality. Therefore, a nursery experiment consisting of Prosopis juliflora biochar and cattle manure treatments at 0% (control), 10% biochar, 20% biochar, 10% manure, 10% biochar + 10% manure, and 20% biochar + 10% manure was conducted. Generally,...

Author(s): Riziki Umazi Mwadalu, Benson Mochoge and Benjamin Danga  

Haemoglobin genetic types and its association with qualitative traits in West African Dwarf sheep

August 2020

This study was carried out to investigate the haemoglobin genetic types and their association with qualitative traits in West African Dwarf (WAD) sheep. The Modified Stratified Sampling Technique (MSST) was used to select the sampling sites within the selected state and animal samples within the sampling sites. A total of 280 adult sheep comprising 140 rams and 140 ewes aged 4 years were used for the study. Data were...

Author(s): Fajemilehin Samuel Oladipo and Adegun Maria Kikelomo  

Epidemiological pattern of malignant neoplasia of the esophagus in the region of ABC- São Paulo, Brazil between the years of 2008 and 2017

July 2020

Esophageal cancer is the sixth leading cause of death from malignancies in the world. Given its importance, it is a disease that needs further studies to deepen its understanding and epidemiological behavior. The aim of this work is to evaluate the epidemiological profile of EC in the ABC, Southeast and the national territory of Brazil between 2008 and 2017. This is an ecological study that evaluated the temporal trend...

Author(s): André Akira Ramos Takahashi, Livia Akemi Ramos Takahashi, Lucas Pereira Abrão Eid, Sandra Di Fellice Boratto, Carlos Eduardo Rodante Corsi, Jaques Waisberg and Luiz Vinicius de Alcântara Sousa  

Impact of some heavy metals on bacterial utilization of kerosene in liquid medium

June 2020

Potential petroleum degrading bacteria, Pseudomonas aerogenosa and Micrococcus sp. was isolated from petroleum contaminated soil in petroleum microbiology laboratory, Department of Microbiology University of Nigeria, Nsukka. Hydrocarbon utilization in liquid media was assessed through time – course optical density measurement. Concentrations of the heavy metals ranging from 50 to 200 mg/L were introduced into 100...

Author(s): Okobo Uchenna Jude, Chibuzor Nwadibe Eze and Akpi Uchenna Kalu  

Knowledge and understanding of energy efficiency in air-conditioning: Exploring perceptions from the manufacturing sector in Ghana

June 2020

The study investigated Energy Efficiency (EE) measures and practices from the perspectives of Ghana's manufacturing sector. A mixed methods approach that applied both qualitative and quantitative methodologies guided the study. The quantitative approach was relevant to establish statistical inferences and the qualitative methods used to provide further in-depth understanding to statistic(s) provided by the...

Author(s): Jones Lewis Arthur and Josephine Fianu  

Mitigating the spread of COVID-19 in low-income countries

June 2020

Coronavirus disease 2019 (COVID-19) has become an increasing concern to global health organizations, and may pose major challenges to health care systems in the low-income countries due to the absence of equipment, lack of funding, and insufficient training of healthcare workers. Thus, mitigation measures that involve social distances and personal hygiene may be prioritized. The main objective of this review was to...

Author(s): Omar Bashir Ahmed  

Prevalence of hepatitis B virus and HIV infections among pregnant women visiting healthcare institutions in Ebonyi State, Nigeria.

April 2020

This study aims to determine the prevalence of hepatitis B virus (HBV) and HIV infections among pregnant women visiting Healthcare Institutions within Ebonyi State, Nigeria. Blood samples were collected from 100 pregnant women who visited Rural Improvement Missionary Hospital (RIMH) and General Hospital (GHE) within Ebonyi State. The presence of hepatitis B surface antigen (HBsAg) in serum was determined using Antec...

Author(s): Nwuzo A. C. , Emioye A. A., Moses I. B., Adiat A. M., Ugbo E. N., Agbom J. N., Ariom T. O., Okata-Nwali O. D., Ugadu I. O., Ayomoh E.  

Surfactants of microbial origin and its application in foods

February 2020

Surfactants are petroleum-derived compounds widely used globally in industrial areas such as pharmaceuticals, cosmetics, textile, among others. The synthesis and use of these compounds has generated environmental pollution, putting public health at risk. For several years, the synthesis of surfactants has been reported by various microorganisms called biosurfactants. Biosurfactants have been shown to reduce surface...

Author(s): Alejandro De Jesús Cortés-Sánchez  

Preparation of Laundry Soap from Used Cooking Oils: Getting value out of waste

January 2020

Palm oil is commonly used to prepare laundry soap by treating it with alkaline solutions. However, using it for this purpose is becoming expensive as palm oil is imported from few major exerting countries. Moreover, it is used for biodiesel production. Therefore, looking for alternative raw material that substitutes palm oil for soap production is imperative. Used cooking oils (UCOs) are good candidates in this regard....

Author(s): Legesse Adane  

Positioning smallholder farming in the agricultural productivity and food security in resource limited Sierra Leone

September 2019

Agriculture is dominated by smallholder farmers who occupy the majority of land, and produce most of the crop and livestock products in Sierra Leone. Nonetheless, the key long-standing challenge of the smallholder farmers is low productivity that stems from the lack of access to markets, credit and technology, and in recent years these are compounded by the volatile food and energy prices and very recently by the global...

Author(s): Bashiru M. Koroma, Alpha Jalloh, Alhaji Brima Gogra and Musa Aziz Yokie  

Structural plasticity and species distribution in a peri-urban mangrove of Southeastern Brazil

September 2019

The goal of this study was to evaluate the structural plasticity and distribution of mangrove species in the Estuarine System of Greater Vitória (ESGV). Four areas distributed along the estuary were analyzed. Fringe and basin forests were sampled in each station. Concomitantly to the forest sampling, interstitial salinity was measured in the field, and sediment was collected for analysis of organic matter (OM)...

Author(s): Sávia Soares Pascoalini, Mônica Maria Pereira Tognella, Karen Otoni de Oliveira Lima and Antelmo Ralph Falquetto  

Assessment of ecosystem services in the Wildlife Reserve of Togodo (South East of Togo, West Africa) and vulnerability-adaptation of surrounding communities to climate variability and change effects

July 2019

This study aims at contributing to the vulnerability and adaptation to climate changes (CC) analysis of bordering communities of Togodo Reserve, in order to enhance their resilience. Specifically, the present study attempted to (i)  identify the climatic hazards of the WRT; (ii) determine the impacts of climate variability and change on their livelihoods; (iii) assess the socio-economic vulnerability of these...

Author(s): Jérémie Kokou Fontodji, Kossi Adjonou, Kossi Novinyo Segla, Kodjo Napo, Komla Elikplim Abotsi, Adzo Dzifa Kokutse, Regina Sagoe and Kouami Kokou  

The importance of undergraduate coursework in student success at South Carolina medical institutions

July 2019

The importance of undergraduate coursework in determining medical school student readiness reaches far beyond preparation to take the standardized Medical College Admissions Test (MCAT®). Since medical schools employ a rigorous and fast-paced learning system to instruct prospective medical students on (A) didactic information in the basic sciences and (B) the critical methodology of clinical practice, it is...

Author(s): Halford G. Warlick IV, Gabriel N. Desouza, Megan L. Wander and Vincent S. Gallicchio    

Diurnal variation of F2-layer critical frequency under solar activity recurrent conditions during solar cycles 21 and 22 at Ouagadougou Station: Prediction with IRI-2012

July 2019

This paper presents foF2 data recorded at Ouagadougou Ionosonde Station and compares them with IRI-2012 model results through its two subroutines, Union Radio Scientifique Internationale (URSI) and Comité Consultatif International des Radio Communications (CCIR) during recurrent solar activity. Except for the solar cycle maximum period, measured data profiles corroborate with the signatures of E×B drift....

Author(s): Emmanuel Wambi Sawadogo, Jean Louis Zerbo, Nour Ali Mahamat  and Frédéric Ouattara  

Hypoglycemic activities and biochemical parameters modulation of herbal formulations of Allium cepa L. in alloxanized diabetic rats

June 2019

The aim of this work was to formulate and evaluate the herbal tablets of Allium cepa L. for in vitro tablet properties, hypoglycemic effects and for their effects on some biochemical parameters in diabetic rats. Aqueous extract of A. cepa L. was obtained by cold maceration and freeze dried. A. cepa L. extract compatibility with some tablet excipients was assessed using Fourier transform infrared spectroscopy. A. cepa L....

Author(s): Josephat Ikechukwu Ogbonna, Ogochukwu Ngozi Umeh, Chukwuemeka Christian Mbah, Sabinus Ifeanyi Ofoefule and Benjamin Chukwuma Ozumba  

Effectiveness of using oils extracts of Peganum harmala and Rhanterium epapposum against Khapra beetle (Coleoptera: Dermestidae) and their chemical compositions

June 2019

Essential oils extracted from two medicinal plants Peganum harmala and Rhanterium epapposum native to the Arabian Peninsula specially Saudi Arabia, were evaluated for their larvicidal effects and emergence of Khapra beetle (Trogoderma granarium) adults. The oil analyzed by thin layer chromatography, the results of phytochemical analysis indicated that the presence of Alkaloids, flavonoids Triterpenes, Cumarins and...

Author(s): Zeinab Eltahir Bakheet Eltahir and Abdelhafiz Adam Dahab  

Assessments of drinking water supply quality at squatter and indigenous settlements of Bagmati River Corridors in Kathmandu

May 2019

This study made an attempt to acquire information on water availability and assess the drinking water quality level of Bagmati river corridors. It identified the different modes of water supply sources and then examined drinking water quality in 37 squatters and 5 indigenous communities which consists 3693 households within Kathmandu Valley. To assess the state of drinking water quality at sources and points of use...

Author(s): Ram Kumar Phuyal, Rojita Maharjan, Rajesh Maharjan and Niranjan Devkota  

Principal air pollutants and their effects on athletes’ health and performance: A critical review

May 2019

The aim of this review was to assess the health effects of the criteria air pollutants: Sulfur dioxide (SO2), carbon oxides (COX), nitrogen dioxide (NO2), particulate matter (PM) and ozone (O3) together with photochemical smog and global warming in relation to exercise with particular focus on athletes. In this review, respiratory and cardiovascular health impacts of the specified principal air pollutants have been...

Author(s): Gashaw Tesema Tsegaw and Yitayal Addis Alemayehu  

Patterns of incidence of colorectal cancer in Brazil from 1990 to 2016

April 2019

Colorectal cancer (CRC) has a high prevalence in both sexes. Although its incidence among the elderly is declining, some studies show an increased incidence in age group under 50 populations, an age group that is not included in the global screening protocols. However, screening the disease in a defined population at younger age groups is of paramount importance in reducing mortality rate. This is an ecological study...

Author(s): Livia Akemi Ramos Takahashi, André Akira Ramos Takahashi, Sandra Di Felice Boratto, Marcella Conz Rodrigues, Diogo Fontes Santos, Jaques Waisberg and Luiz Vinicius de Alcantara Sousa  

Nanomedicines: Challenges and perspectives for future nanotechnology in the healthcare system

April 2019

A novel approach of combining nanotechnology to the pharmaceutical and biotechnological field resulted in the formation of nanomedicines. Nanomedicines have progressed to a more considerable extent for curing irremediable diseases such as neurological defects, cardiovascular defects, etc., because of its minute size which assists in increased surface area and hence a remarkable dissolution profile. In addition to the...

Author(s): Ajazuddin, Sabahuddin Siddique, Amit Alexander, Pooja Yadav, Mukta Agrawal, Ahmed M Shehata, Mahmoud A Shaker,  Syed Ata Ur Rahman, Mohi Iqbal M Abdul and Mohamed A. Shaker,

Precision attributes based index for the selection of efficient agricultural machinery

March 2019

Development and introduction of high capacity, precise, reliable and energy efficient machinery/equipment is the need for judicious use of inputs. Manufacturing of agricultural machinery in India is varied in nature and starts from village artisans, tiny units, cottage to small scale industries, organized tractor and agricultural machinery manufacturers including energy and processing machinery industry. Precision in...

Author(s): Manjeet Singh, Karun Sharma, Pramod Mishra, Bharat Patel and S. K .Singh  

Compaction and strength characteristics of recycled pavement material: Cement mixtures used for road pavement purposes

February 2019

The implementation of conventional soil-cement stabilization techniques is hindered by the relatively large particle size of road pavement materials. This study aims to investigate the effects of the gradations of soil particles, cement content, and water content on the soil-cement materials (real construction materials collected from the field) used for pavement. Recycled crushed rock obtained from the pulverizing...

Author(s): Apichit Kumpala, Peerapong Jitsangiam, Anukun Arngbunta and Pattarapong Singhan  

Breeding seasons of some commercially important fishes in Ethiopia: Implications for fish management

January 2019

Fishing during periods close to spawning (breeding) season results in a decline in fish population. Identifying the breeding season of each fish species is important for conservation and aquaculture development. Published and unpublished sources of data were used to prepare this review manuscript. Based on the review process, it is possible to observe that the breeding season of fish occurred all year round. Although,...

Author(s): Agumassie Tesfahun  

Development and execution of a novel strategic statistical tool to determine in-vitro in-vivo correlation for sustained release capsules of metoprolol tartrate in humans

January 2019

The aim of this present study was to develop and formulate sustained release coated metoprolol tartrate matrix granules and to design an in-vitro in-vivo correlation (IVIVC) tool based on bioavailability data available from human volunteers. USP apparatus II, paddle type was used for generation of in-vitro drug release data for each formulation. The similarity factor (f2) was determined using dissolution data parameters...

Author(s): Sabahuddin Siddique, Mohi Iqbal Mohammed Abdul, Syed Ata Ur Rahman, Durdana Lateef, Anirbandeep Bose, Shubhasis Dan, Faraz  Siddiqui  

Honey activity on the proliferation and migration of oral squamous cell carcinoma: In vitro and bioinformatic analysis

October 2018

This study aimed to investigate, in oral squamous carcinoma cells (OSCC), the  antineoplastic effect of Apis mellifera honey produced from Aroeira and wildflower, in the region of Jequitinhonha River Valley, Brazil. Furthermore, we investigate the molecular mechanism of honey performance through bioinformatic analysis. Honey and OSCC-related gene list were screened using GeneCards. The online tool STRING was used...

Author(s): Eliane Macedo Sobrinho Santos, Hércules Otacílio Santos, Juliana Rezende Sá Miranda Gonçalves, Anna Christina Almeida, Igor Viana Brandi, Alex Sander Rodrigues Cangussu, Janainne Nunes Alves, Sabrina Ferreira de Jesus, Ricardo Jardim Neiva, Kattyanne de Souza Costa, André Luiz Sena Guimarães and Lucyana Conceição Farias  

Accident severity analysis on national highways in Bangladesh using ordered probit model

September 2018

National Highways of Bangladesh, where majority of fatal accident takes place, are considered as the accident-prone location. Statistics revealed that despite some major initiatives undertaken to improve road safety, death rate at National Highways of Bangladesh is quite high compared to other developed as well as developing nations. To understand the relationship between injury severity and accident factors,...

Author(s): Md Tanvir Siddique  

A study on comparison of air permeability properties of bamboo / cotton and cotton towels

August 2018

As a result of the literature review, it was observed that previous studies concentrated mainly on investigating the water absorption properties of towel fabrics, but limited studies analyzed air permeability properties of towel fabrics. The purpose of this study is to investigate the air permeability of bamboo / cotton and cotton towels produced with different pile heights and to analyze the effect and importance level...

Author(s): Filiz Sekerden  

Probabilistic seismic assessment of arch dams in Turkey

August 2018

Arch dams are of great importance in the world. In Turkey, there are 1200 existing dams with different types. Arch dams are important due to their economic resource in irrigation and water supply which are significant to the homeland security and the agricultural economy. Researchers have been carrying out various studies on dams and their seismic resistance especially after the earthquakes that occurred in the recent...

Author(s): Kasim A. Korkmaz and Asuman I. Carhoglu  

Indigenous knowledge on highland bamboo (Yushania alpina) management and utilization practices in Kokosa Woreda, South East Ethiopia

July 2018

Bamboo is one of the world’s most important non-timber forest products (NTFPs) which have been advocated for poverty alleviation in many regions. However, in Ethiopia it is utilized below its potential due to lack of scientific knowledge and awareness on its management and utilization. Therefore, the main objective of this study was to investigate the indigenous knowledge of highland bamboo management and...

Author(s): Seyoum Gebrekidan, Lemma Tiki and Yigardu Mulatu  

Expanding the global horizon of engineered crops: Miles ahead to go

May 2018

Transformations in agriculture parallel to the advancements in civilizations have been a novel practice to enhance the productive creation of Mother Nature to nurture the society. Scientific advances of last century featuring identification of DNA, the development of molecular biology and its exploitation in life sciences have taken a lead. Progressions such as crop improvements through genetic modifications/genetic...

Author(s): Brijesh Pandey, Rajesh Kumar Tiwari and Abhishek Kumar  

New application of principal component regression in estimation of electrical energy consumption in an abnormal automatic meter reading system

May 2018

This paper proposes a new application of principal component regression (PCR) for estimating electrical energy consumption in case of abnormal automatic meter reading (AMR) systems. These events occur in a delivery metering system such as problems from mistakenly setting and connecting meters in electrical systems, broken metering accessories, etc. The estimation is performed by using MATLAB. The unclean sampled input...

Author(s): Visavat Kantikoon and Vijit Kinnares  

Modelling climate change impact and mitigation actions: A case study of rice productivity in West Africa based on panel data analysis

April 2018

This paper investigated how climate change can affect paddy rice productivity and proposed a mitigation measure that may be undertaken. The analysis first explored the potential impacts of climate variables on rice yields by using panel data covering the period 1980 to 2016 for seven countries members of the West African Economic and Monetary Union (WAEMU). It then went on to calculate the investments needed in Research...

Author(s): Brice Hoyeton Ainan, Jingdong Luan and Mascimus Senan Soton  

Path analysis to evaluate the direct and indirect effects of climatic variables in the development stages of Tuta absoluta (Lepidoptera: Gelechiidae) in tomato (Solanum lycopersicum L.)

April 2018

The objective of this study was to evaluate the influence of climatic variables on the population dynamics of the tomato moth Tuta absoluta (Meyrick, 1917), (Lepidoptera: Gelechiidae) through correlations and path analysis, on the main variable in organic and conventional tomato crops (Solanum lycopersicum L., Solanaceae). We studied the effects of the pheromone (used Delta traps) on insect phase sampling in two areas...

Author(s): Rubens Pessoa de Barros, Ligia Sampaio Reis, Isabelle Cristina Santos Magalhães, Claudio Galdino da Silva, Miriany de Oliveira Pereira, Ana Cléía Barbosa de Lira, Jaciara Maria Pereira e Silva, João Gomes da Costa and Elio Cesar Guzzo

Bacteriophages and phage products: Applications in medicine and biotechnological industries, and general concerns

March 2018

Since their discovery in 1928 antibiotics have transformed medicine and saved millions of lives; however, the current global appearance of antibiotic resistance and absence of new antibiotics commercialization to the health sector return to the post-antibiotic era. Today, scientists are working to revive a century old technique of using bacteriophage as an option to currently available antibiotics in management of...

Author(s): Mulugeta Belay, Tesfaye Sisay and Tesfaye Wolde  

Image enhancement based on neuro-fuzzy gradient profile clustering

March 2018

This paper proposes a technique for image enhancement using Neuro-fuzzy based gradient profile generation to reconstruct the high resolution image from a single low resolution one. The natural gradient priors are collected and their statistics are analyzed and learned through Neuro-fuzzy model. The model adopts powerful data adaptation from neural network and combines with fuzzy system to enhance the ability in...

Author(s): Jaturon Ngernplubpla and Orachat Chitsobhuk

Survival modeling of accident risks of vehicle drivers in Northern Region of Ghana

February 2018

The primary objective of this article is to investigate how survival modelling can be used in traffic accident analysis to explain driver accident risk factors. Accident records of 398 drivers from 2007 to 2009 were obtained from Motor Traffic and Transport Department (MTTD), Ghana Police Service, Northern region. Cox proportional regression model was employed for the analysis using the SAS package. The conclusion was...

Author(s): Alhassan Faisal, Mamadou Lamine Diedhiou and Katara Salifu

Precipitation concentration changes over India during 1951 to 2015

February 2018

The precipitation concentration index (PCI) of Indian region using monthly data for 1951 to 2015 was estimated on an annual and seasonal scale to show the changes in temporal and spatial distribution of rainfall over the 34 meteorological sub-divisions. As a result, annual values of PCI showed more erratic nature than the uniform to moderate behaviour of seasonal (Jun-Sept) PCI values. Computation of PCI will be useful...

Author(s): S. S. Nandargi and K. Aman

Preparation of value added composite sheet from solid waste leather - A prototype design

January 2018

Leather sector in Ethiopia is blessed with huge livestock resource which serves as source of raw material (hides and skin), cheap and highly disciplined workforce, cheap cost of doing business, significant international comparative advantages, investment incentives, and custom duty exemption. This industry remains a supplier of low value added, semi- processed hides and skin to the international market. leather sheet of...

Author(s): Teklay A., Gebeyehu G., Getachew T., Yaynshet T., Inbasekaran S. and Sastry T. P.  

Histological changes in the larvae of the domestic mosquito Culex pipiens treated with the entomopathogenic fungus Beauveria bassiana

January 2018

The Culicidae are biting insects that are most harmful to people. They are almost all blood-suckers, and are responsible for the spread of many important diseases such as malaria, yellow fever and elephantiasis. Entomopathogenic microorganisms occupy an important place among the alternative methods of fighting against pests insect. The fungus, Beauveria bassiana is an entomopathogenic agent naturally present in the...

Author(s): BENZINA Farida, HAMID Sonia, MOHAND-KACI Hakima, BISSAAD Fatma and HALOUANE Fatma

Influence of layouts on visual impression: Comparing 12 flyer layout patterns

December 2017

The purpose of this study was twofold. First, extent of the influence of flyer layouts on user impressions was investigated. Data were collected from 425 non-designers. The participants, consisting of eight groups of men and women between the ages of 20 and 50, were shown 60 flyers (12 layouts × five other design features) of a piano concert on a computer screen. The percentage of layout contribution to user...

Author(s): Yutaka Andoh, Kengo Omura, Takano Kentaro, Kawamoto Koushi and Tsutomu Fujinami

Time step-size on simulation of tree-induced capillary potential in unsaturated soils

November 2017

Unreliability in the assumption of soil properties, selection of elapse time, choice of time step size and atmospheric variables causes most inconsistencies in the simulation results. Therefore, time step size studied was based on root water up-take on a single Lime tree on a Boulder Clay. The effects of ¼, ½ and 1 day time step sizes on generated capillary potential at 0.0 m, 1.4 m and 3.0 m from the lime...

Author(s): Mu’azu Mohammed Abdullahi

Determination of heavy metals in landfill area in Tocantins, Brazil

October 2017

Improper disposal of municipal solid waste is a problem in Brazil, especially in the North, as noted in Araguatins, TO and can lead to environmental contamination caused by heavy metals. This study aims to analyze the occurrence of heavy metals in soil and leachate in the landfill of Araguatins, TO, Brazil. Soil samples and manure were collected at different points and stored in plastic containers for later laboratory...

Author(s): Cristiely Maria de Sousa Alves de Oliveira, Alcione Olinto Galvão, Dany Geraldo Kramer, Isabelle Ribeiro Barbosa and Anesio Mendes de Sousa

Climate change impact on maize (Zea mays L.) yield using crop simulation and statistical downscaling models: A review

September 2017

Review of literature related to the impact of climate change on maize (Zea mays L.) yield using Global Climate Models (GCMs), statistical downscaling, and crop simulation (APSIM-maize-and-CERES-maize models) models are discussed. GCMs can simulate the current and future climatic scenarios. Crop yield projections using crop models require climate inputs at higher spatial resolution than that provided by GCMs. The...

Author(s): Charles B. Chisanga, Elijah Phiri and Vernon R. N. Chinene

Effect of sonication at different ultrasonic frequencies on the quality and quantity of fatty acids of the oil of Chlorella vulgaris

August 2017

In order to investigate the effect of sonication on the fatty acids of alga oil, oil of Chlorella vulgaris was extracted by sonication at 20, 40, 60 and 80 kHz. Oil extracted by refluxing alga cells in n-hexane was used as control. Probable changes in the structures of the fatty acids were investigated using gas chromatography and Fourier transform infrared spectroscopy (FT-IR). The retention profiles of the...

Author(s): Fasakin Adeyinka Olubunmi

West African Monsoon (WAM) and Atlantic Cold Tongue (ACT) onsets using Regional Climate Model

August 2017

This study focused on the occurrences and relationships of the Atlantic Cold Tongue (ACT) and the West African Monsoon (WAM) onsets in the Sudano-Sahelian region during 1983-2000. Two simulations (WAFSSTERA and WAFSSTREY) were used to investigate the sensitivity of the Regional Atmospheric Model (MAR) for two different datasets of sea surface temperature (ERA-40 and Reynolds SST datasets). The MAR reproduced the...

Author(s): K. Benjamin KOUASSI, Adama DIAWARA, K. Yves KOUADIO, Fidèle YOROBA, and Elisée TOUALY

Design and fabrication of 3.60 m3 household plastic bio digester loaded with kitchen waste and cow dung for biogas generation

July 2017

A 3.6 m3  pilot plastic digester for family generation of biogas was designed, constructed and evaluated through physico -chemical studies using 50% cow dung and 50% kitchen wastes. The ash content of waste increased after digestion while the fibre and fat contents of the waste was 5.10 and 1.05% but significantly (p<0.05) decreased to 2.49 and 0.70% after digestion. The carbohydrate content of the waste...

Author(s): Nwankwo, C. S., Eze, J. I. and Okoyeuzu, C.

Determination of the most economic thickness and energy source in the design of local hemispherical clay pots

July 2017

There is currently great emphasis on research regarding various aspects of energy sources but the question of optimum usage of the energy is equally important. This work seeks to produce an economic computer-aided design of a fire-clay pot based on conditions that give minimum cost per unit of usage time for the consumer. A percentage of energy loss from the fuel to the environment due to inefficiency of the heating...

Author(s): C. Fwalo, A. Habanyama, G. T. Baliga and J. K. Pondo

Optimizing the life cycle of an office building at semiarid region

June 2017

Energy consumption by occupants during utilization phase concerns the increase of global warming potential and a shortage of energy resources. Energy consumption in an effective way decreases the risk of global warming. Use of materials with high embodied energy and embodied carbon in building components may improve the energy performance of the building, but it can ameliorate global warming. The issue of Life Cycle is...

Author(s): Pooya Pakmehr and Mustafa Erkan Karaguler

Design and simulation of direct torque control of induction motors using VHSIC Hardware Description Language (VHDL)

June 2017

Induction motors are currently used in many industrial applications. Thus, their control techniques have received a lot of interest. An efficient method of induction motor control is the Direct Torque Control (DTC). It is considered particularly interesting since it is independent of machine rotor parameters and requires no speed or position sensors. This paper presents a simulation of a DTC strategy for three-phase...

Author(s): Cesar da Costa and Christian Oliveira Santin

Evaluation of sustainable urban preservation concept via Ankara Hamamönü example

May 2017

The city identity, taking form with pysical, cultural, socio-economical, historical and stylistic factors, carrying peculiar characteristics in each city, formed by the citizens and their lifestyles, constantly developing and reflecting the sustainable urban concept, is a completion of concepts. Urban identity elements, either they are natural or human artifact, are the witnesses of the past and form our cultural...

Author(s): Funda Aşut and İ. Raci Bayer

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