Knowledge Discovery in Online Repositories: A Text Mining Approach

Before the advent of the Internet, the newspapers were the prominent instrument of mobilization for independence and political struggles. Since independence in Nigeria, the political class has adopted newspapers as a medium of Political Competition and Communication. Consequently, most political information exists in unstructured form and hence the need to tap into it using text mining algorithm. This paper implements a text mining algorithm on some unstructured data format in some newspapers. The algorithm involves the following natural language processing techniques: tokenization, text filtering and refinement. As a follow-up to the natural language techniques, association rule mining technique of data mining is used to extract knowledge using the Modified Generating Association Rules based on Weighting scheme (GARW). The main contributions of the technique are that it integrates information retrieval scheme (Term Frequency Inverse Document Frequency) (for keyword/feature selection that automatically selects the most discriminative keywords for use in association rules generation) with Data Mining technique for association rules discovery. The program is applied to Pre-Election information gotten from the website of the Nigerian Guardian newspaper. The extracted association rules contained important features and described the informative news included in the documents collection when related to the concluded 2007 presidential election. The system presented useful information that could help sanitize the polity as well as protect the nascent democracy

Isolates of Some Rotting Fruits Collected at Yankaba Market, Kano, Nigeria

Studies on fungi isolates were carried out over a period of 4 weeks with different rotting fruits that were collected from sellers in Yankaba market, Kano. The fruits are sweet orange, apple, pineapple, watermelon, banana, pawpaw, coconut and wild bush mango were collected in clean sterile polythene bags separately. Each of the samples was cultured and isolated at room temperature (370C). Materials used in culturing included Petri-dishes with potato dextrose agar as the media. Methylene blue was used in mounting and slide staining. It took a period of 7 days to incubate and isolate the fungi namely Aspergillus spp., Sclerotium spp., Trichoderma spp., Gloeosporium spp., Rhizopus spp. and Rhizoctonia spp. were responsible for post-harvest deterioration of fresh fruits and vegetables. Rhizopus spp. had the highest frequency of occurrence

Influence of Sulphuric Acid on the Compressive Strength of Ternary Blended Geopolymer Mortar

The deteriorating effect of acid media on cement based constructions has become a worrying problem all over the world. These media generally occur as solutions in various branches of the industry, acid rains and mists, and acid ground-waters. A very popular form of acid attack on concrete that is usually referred to as biogenic sulphuric acid attack also occurs in both industrial and urban sewer systems. The emergence of new cementitious materials, like geopolymer cements, during the past decades necessitates detailed experimental work and research activities to investigate their durability in aggressive acid environments. The study therefore explored the development of alkali-activated CPA-SHA-MK ternary blended geopolymer mortar (GPM) using sodium silicate (Na2Si3) and sodium hydroxide (NAOH) solutions with 9M constant concentration as alkaline activators under both the aggressive and ambient-temperature curing media. The mass ratio of sodium silicate to sodium hydroxide (NS: NH) and as well as the binder to fine aggregate were fixed at 2.5 and 0.8 respectively. The durability of the ternary blended geopolymer mortar was examined through acid resistance test using 50 mm cubes after 28, 56 and 90 days of curing. The results revealed that the setting time prolonged as the replacement levels of RHA-MK increased at a decrease in the replacement levels of CPA. The results also showed that both the PCM and GPM samples studied suffered mass and strength losses in the acid solution and the loss increases at an increase in the hydration periods. The strength losses were observed to be higher in PCM mix (12.19 N/mm2 at 90 days) as compared to the GPMs (6.67 N/mm2 at 90 days) while the mix incorporated 50% CPA, 33% MK and 17% RHA (C50M33R17) was observed to be better compared to other mixes in durability behaviour. The study therefore recommends C50M33R17 mix proportion for good durability performance.&nbsp

Anti-cholesterol triterpenoid acids from Saurauia vulcani Korth. (Actinidiaceae)

Two triterpenoid compounds, 3 beta-hydroxy-Olean-12-en- 28-oic acid (1) and 3,19-Dihydroxyurs-12-en-28-oic acid (2) were isolated from the leaves of Saurauia vulcani Korth. (Actinidiaceae). The chemical structures of compounds 1-2 were elucidated with spectroscopic data (UV, IR, H-1, C-13, DEPT 135o, HMQC, HMBC, H-1-H-1 COSY NMR) and MS as well as compared with previously reported spectra data. All the compounds were evaluated for their anti-cholesterol activity by the Liebermann-Burchard (LB) colorimetric assay. Compound 1-2 showed a remarkable anti-cholesterol activity. Most importantly, the raised concentration of 1-2 exhibited a dose-dependent manner. The discoveries of anti-cholesterol compounds 1-2 were first reported

A stochastic frontier approach to technical efficiency analysis of smallholder dairy farmers in Swaziland

The Swazi nation is traditionally an agricultural nation with almost every homestead on Swazi Nation Land(SNL) keeping a variety of livestock for beef and milk. The country has potential to produce more milk but stillimports 85% of milk from South Africa. The study evaluated the technical efficiency and constraints of the milksupply chain. A descriptive quantitative research design was used in the study and data were collected in 2014using structured questionnaires. The data were collected from 93 farmers, 16 retailers and 1 processor. Data wereanalysed using descriptive statistics, Cobb Douglas function, and Tobit regression model. There were 73.1%males farmers and 50.5% had between 8-14 years of formal education. All the farmers fed their cows with forageand 97.8% used concentrates. The efficiency analysis results indicated that frequency of extension visit and ageof the farmer were negatively associated with technical efficiency, while market information positively affectedefficiency. The technical efficiency mean was 78.2%. This indicates that overall, there is potential to increaseefficiency among dairy farmers by 21.8%. Farmers had problems of scarcity of grazing lands, high feed costs,unavailability of inputs and shortage of water and labour. There is a need for improving extension service,encouraging cooperatives and improving producer’s price of milk in order to enhance productivity and efficiencyof farmers.Keywords: Dairy farmers, Swaziland Dairy Board, supply chain of milk, technical efficiency, stochastic frontierapproach

Medicinal plants used in the management of diabetes mellitus 2015

Diabetes mellitus is one of the common endocrine disorders prevalent in almost all of the countries. This chronic pathology is characterized by hyperglycemia caused by defective insulin action, insulin secretion, or the combination of both. Prolonged persistence of elevated blood glucose level consequently caused a series of complications such as nephropathy, retinopathy, and cardiomyopathy. Currently available synthetic drugs for treating this disease are found to be associated with many adverse effects. The use of plants in medicine is an age-long practice in various parts of the globe for both preventive and curative purposes. Several warnings have been issued over lack of quality control, scientific evidence for the efficacy, and potential adverse effects of herbal remedies including hepatotoxicity, nephrotoxicity, cardiotoxicity, and reproductive toxicity among others. Despite all of these, reliance on herbs as medicine for the management of diabetes mellitus is still much practiced by a large proportion of the world population because they are readily available and affordable with perceived reduced toxicity. Therefore, with the upsurge of interests in medicinal plants, there is a need for thorough scientific investigations of these plants for both efficacy and potential toxicity. In this issue, we present some recent advances in the use of medicinal plants for treating diabetes mellitus. B. Pang et al. (“Innovative Thoughts of Treating Diabetes from the Perspective of Traditional Chinese Medicine”)presented a review article on the contribution of traditional Chinese medicine to the development of alternative and complementary medicine for the treatment and prevention of diabetes mellitus. In another paper (“Effect of Rhizoma Coptidis (Huang Lian) on Treating Diabetes Mellitus”), B. Pang et al. discussed the efficacy and safety of Rhizoma Coptidis in the treatment of diabetes mellitus. In another study (“Evaluation of the Effects of Cornus mas L. Fruit Extract on Glycemic Control and Insulin Level in Type 2 Diabetic Adult Patients: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial”), R. Soltani et al. reported the results of a clinical trial on the effect of Cornus mas L. fruit extract on hyperglycemia in type 2 diabetic patients. In addition, W. Liu et al. (“The Effects of Chinese Medicine on Activation of Wnt/β-Catenin Signal Pathway under High Glucose Condition”) present a valuable review on some compounds implicated in the regulation of Wnt/β-catenin signal pathway as a mechanism of action involved in the antihyperglycemic activity from Chinese medicine. Furthermore, A. O. T. Ashafa and M. I. Kazeem (“Toxicopathological Evaluation of Hydroethanol Extract of Dianthus basuticus in Wistar Rats”) reported on the effects of Dianthus basuticus (a Basotho plant with acclaimed antidiabetic activity) on some biochemical parameters and histology of Wistar rats. Finally, X.-J. Li et al. (“TCM Formula Xiaoyaosan Decoction Improves Depressive-Like Behaviors in Rats with Type 2 Diabetes”) evaluated the effect of traditional medicine formula, Xiaoyaosan, on the cognitive function of diabetic rats. After the first volume of this special issue that was published in 2014, we hope that this issue will present additional valuable information for scientists and clinicians

The Effect of the Transformational Leadership on the Elements of Human Capital in the Jordanian Communication Sector

This study investigated the impact of the transformational leadership on the human capital  in the Jordanian communication companies ,The main hypotheses were proposed in accordance with the dimensions and model of the study and their variants. For the purposes of data gathering, a questionnaire was designed which included (50) question, Next, the study dimensions were identified, the questionnaire was distributed on the simple of the study (400) people.After the data collected the proper statistical analysis was applied. The result showed that the transformational leadership had big impact on the human capital in organizational.This study also, recommended a set of conclusions and recommendations that achieve the purpose of this study. Keywords: Transformational Leadership, Human Capital

The effectiveness of automated writing evaluation: a structural analysis approach

Modern advancement in learning technologies and tools has presented innovative written corrective feedback (WCF) methods based on artificial intelligence (AI) and existing corpora. Research has shown that these tools are perceived as exciting and useful by students, yet studies on their effectiveness and impact on students’ writing are relatively insufficient. To this end, the present study investigated the effectiveness of Grammarly writing assistant as perceived by 98 undergraduates who used the tool for a 14-week semester. The study adopted a questionnaire based on a modified technology acceptance model (TAM). The gathered data was analyzed using SmartPLS 3 software. The results revealed that different factors predict students’ perceptions about Grammarly and their intention to use it. Some of these factors were not presupposed. The findings imply using Grammarly as an extra learning tool rather than a basic one. It is suggested that future research on the efficacy of Grammarly should adopt longitudinal and experimental approaches