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Search Results: 1 - 10 of 4106 matches for " KO Kitome "
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Influence of age of mice on the susceptibility to murine schistosomiasis infection
DS Yole, SK Gikuru, EO Wango, KO Kitome, S Kiarie, M Limo
African Journal of Health Sciences , 2006,
Abstract: Intensity of human schistosomiasis infection increases with age, a peak being attained at early puberty. Hormones could be involved in the age-related changes in susceptibility to schistosomiasis. Male BALB/c mice were infected with Schistosoma mansoni either before or after puberty and worm numbers, cellular immune responses, hormonal levels and pathology analysed. Pre-puberty infected mice had a significantly higher number of adult worms (p<0.05), more severe granulomas, higher mortality rate and higher proliferative responses as compared to postpuberty infected mice. Levels of the hormones were lower in the pre-puberty infected mice as compared to the post-puberty group early in the infection. Plasma levels of testosterone and luteinizing hormones decreased significantly (p<0.05) in infected mice when compared to controls. Susceptibility to S. mansoni in male BALB/c mice seems to be influenced by levels of testosterone and leutenizing hormone at infection. Albeit, an infection with S. mansoni seems to lower the hormonal levels. African Journal of Health Sciences Vol. 13 (1-2) 2008: pp. 47-54
Studying the Utilization of Plastic Waste by Chemical Recycling Method  [PDF]
Adil Ko
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.37051

The rapid increase in the use of plastic materials in the recent years led to the accumulation of excessive amounts of plastic waste. The so-called thermoplastics such as PE, PP, PS, PVC and PET as well as materials that are derived from these are the type of plastic that is most used and consequently creates most of the waste. In this study, the original and waste forms of PE and PP plastic types have been chosen for thermal and catalytic degradation. As process parameter, 410oC - 450oC temperature interval and 600 mL/min constant flow rate nitrogen gas have been chosen as the carrier gas and the reaction time was considered to be 90 minutes for all experiments. Liquid products collected in experiments were separated by means of fractioned distillation process. For purposes of determining product distribution, the fractions, which were separated by distillation, were diluted in an appropriate solution for analysis of GC/MS. In the study conducted, it has been observed that the liquid product distribution obtained mainly consists of a mixture of saturated and unsaturated (heptane, heptane, octane, nonane, dodecane, etc.) hydrocarbons.

Web-based GIS System for Real-time Field Data Collection Using Personal Mobile Phone  [PDF]
Ko Ko Lwin, Yuji Murayama
Journal of Geographic Information System (JGIS) , 2011, DOI: 10.4236/jgis.2011.34037
Abstract: Recently, use of mobile communicational devices in field data collection is increasing such as smart phones and cellular phones due to emergence of embedded Global Position System GPS and Wi-Fi Internet access. Accurate timely and handy field data collection is required for disaster management and emergency quick responses. In this article, we introduce web-based GIS system to collect the field data by personal mobile phone through Post Office Protocol POP3 mail server. The main objective of this work is to demonstrate real-time field data collection method to the students using their mobile phone to collect field data by timely and handy manners, either individual or group survey in local or global scale research.
Quantitative versus Qualitative Geospatial Data in Spatial Modelling and Decision Making  [PDF]
Ko Ko Lwin, Yuji Murayama, Chiaki Mizutani
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.43028
Abstract: In general, geospatial data can be divided into two formats, raster and vector formats. A raster consists of a matrix of cells where each cell contains a value representing quantitative information, such as temperature, vegetation intensity, land use/cover, elevation, etc. A vector data consists of points, lines and polygons representing location or distance or area of landscape features in graphical forms. Many raster data are derived from remote sensing techniques using sophisticated sensors by quantitative approach and many vector data are generated from GIS processes by qualitative approach. Among them, land use/cover data is frequently used in many GIS analyses and spatial modeling processes. However, proper use of quantitative and qualitative geospatial data is important in spatial modeling and decision making. In this article, we discuss common geospatial data formats, their origins and proper use in spatial modelling and decision making processes.
Simulation Study of the Influence of the Hidden and Exposed Stations for the Efficiency of IEEE 802.15.4 LR-WPAN Networks  [PDF]
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.21002
Abstract: This article presents an analysis of wireless personal area networks with low transmission rate, utilized more and more often in industrial or alarm systems, as well as in sensor networks. The structure of these systems and available ways of transmission are defined by the IEEE 802.15.4 standard. The main characteristics of this standard are given in the first part of this article. The second part contains the description of simulation tests that have been realized. Their results make available an evaluation of the effective transmission rate of a transmission channel, the resistance to the phenomenon of hidden station as well as sensibility to the problem of the exposed station.
Food Sanitation Knowledge, Attitude, and Behavior for the University Restaurants Employees  [PDF]
Wen-Hwa Ko
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.27102
Abstract: The purpose of this study was to discuss the food sanitation knowledge, attitude, and behavior for the employees of university restaurants, and furthermore, to explain the interrelations of these various were occurring at school. A questionnaire survey procedure was used. Each two constructs of food sanitation attitude and behavior were analyzed by factor analysis. Data was analyzed by description, Pearson’s correlation and multiple regression analysis. The correctness rate toward the whole sanitation knowledge of trials was 70%. The overall attitude toward food sanitation was prone to positive and the attitude of employee self-responsibility was superior to the attitude of food sanitation practice. The sanitary guiding behavior was better than the sanitary habit behavior; and there was a significant relationship indicated through Pearson correlation analysis among three various. The sanitation knowledge and sanitation attitude showed a 42.6% predictive power to behavior, the attitude was mediated between knowledge and behavior. The university restaurant employees shared a more pessimistic view toward the benefits of training and the institutions could establish a committee for monitoring food nutrition and sanitation. It provides valuable information for development employees training while seeking to raise school restaurant food safety levels.
Affective Characteristics and Teaching Skills of English Language Teachers: Comparing Perceptions of Elementary, Secondary and High School Students  [PDF]
Ebru Melek Ko
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.42017

The present study aims to investigate the elementary, secondary and high school students’ perceptions on a good language teacher. The participants are 365 Turkish school students who are learning English as a foreign language. The present study has revealed that most of the student groups generally differ in terms of issues related to teaching skills when compared with the issues related to the affective skills. In the present study it has been also found that what students expect from a good English teacher is to have the ability to maintain discipline, motivate students, learn about the learner’ needs and establish good relations with them. The study also reveals striking results with respect to classroom discipline and teacher subject knowledge.

Physically and Chemically Evaluation for the Water Quality Criteria in a Farm on Akcay  [PDF]
Ebru Yilmaz, Cengiz Ko
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.62010

Akcay is a high flow stream supported with strong bracket and is emerging from border of Beyagac County in Denizli province. In this study, it was performed for determining some limnological traits of Akcay River in Bozdogan County in Aydin province. This study was conducted with a 12-month period between January 2010 and December 2010. The chosen pilot farm is raising fish (Oncorhynchus mykiss). The water of Akcay River is used on farm. Some limnological parameters (dissolved oxygen, temperature, pH, EC, nitrite, nitrate, orthophosphate, minerals) were investigated for determining the water quality of zone.

A Study on the Causes of Sediment Accumulation in the Drainage Systems  [PDF]
Cengiz Ko, Ebru Yilmaz
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.64028

Accumulation of sediment and silt in the drainage canals is undesirable, yet inevitable occurrence in the course of the use and operation of any drainage canal network. In this study, D-25 drainage canal group, taking place in the Nazilli irrigation system with an area of 1165 ha is the only system where all planned activities have been completed. It has been determined that the drainage system was constructed according to original drainage project. The depth of accumulated sediment in the drainage canals in the research area was determined from the difference between the measured elevation and the elevation given in the design projects. The reasons for siltation in the D-25 drainage canal group have been studied by looking at the results of the elevation measurements made in 2010-2012. The measurements made in D-25 drainage canal group showed that there were significant differences between the actual structure (bridge, culvert, and conduit) bottom elevations and the elevations given in the design projects. In addition, the length of some canals would not coincide with the design project either. 83.3% (93.3% in length) of the canals had differences in structure bottom elevations. Of the total 55 structures 45 (81.8%) had a 0.10 m or more difference in bottom elevation from the project. Of the erroneous structures 73.3% had an average of 0.40 m, and 26.7% had an average of -0.25 m difference in bottom elevations from the design projects.

Origin of Human Language in an Evolutionary Context: Evolution-Progression Model  [PDF]
Kwang Hyun Ko
Advances in Anthropology (AA) , 2015, DOI: 10.4236/aa.2015.52007
Abstract: This article approaches what is considered to be a linguistic enigma with an interdisciplinary scientific approach. In this manuscript, the author analyzes the infant developmental stage, human anatomy, animal behavior studies, and anthropological changes. Furthermore, prominent theories in the field, such as the provisioning model, ADHD (attention deficit hyperactivity disorder) theory, and the metabolic hypothesis for human altriciality are considered in an evolutionary context to unravel the origin of language. First, two evolutionary adaptations in humans, bipedalism and delicate muscle movements, resulted in the lack of a need for “hyperfocus”. Second, a relatively safe and rich environment replaced “hyperfocus” with social cohesion. Third, a burgeoning social interaction ushered in natural selection, whereby child helplessness or early parturition supported exceptional self-consciousness (intelligence). The result of concentrated self-consciousness, which involved enlargement of the posterior parietal cortex (sense of self), prefrontal cortex (social cognition), and temporal lobe (language interpretation), was human language. Language was not a sudden revelation; instead, it was a gradual process and a built-in part of the evolutionary sequence. Last, this article implies how language might have begun in accordance with the prior multidisciplinary analysis.
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