Miracle-dz/UniFAR-FTUs huggingface dataset:
Reducing Mathemaphobia and Improving Students’ Achievement in Mathematics Using Constructivist Approach in Abia State Nigeria

The study investigated reducing Mathemaphobia and improving students’ achievement in Mathematics using constructivist approach in Abia State, Nigeria. The study adopted a mixed research design which involved a descriptive survey design and a quasi-experimental of pre-test, post test and control group design. Seven research questions were posed and answered and three hypothesis were formulated and tested at 0.05 level of significance. The population comprised all the 8,325 junior secondary school students in Abia State. A sample of 833 Junior Secondary School students was used for the descriptive survey selected through simple random techniques and a sample of 174 Junior Secondary School students was used for the experimental groups selected through stratified random sampling technique. The instruments for data collection were a questionnaire titled Student Opinion of Mathemaphobia Questionnaire (SOMQ) and Mathematics Achievement Test (MAT). The instruments were validated by five experts and the reliability indices of the instruments were 0.92 and 0.71 respectively. Mean and standard deviation were used to answer the research questions, while analysis of covariance was used to test the hypotheses at 0.05 level of significance. The findings revealed that Junior Secondary School students agreed that Mathemaphobia exist in secondary schools, the study equally revealed that the causes of Mathemaphobia include; poor foundation in Mathematics, improper teaching of Mathematics, low self-esteem, and unqualified Mathematics teachers. The study identified the effects of Mathemaphobia as poor performance in Mathematics and other Mathematics related subjects, hinders admission into higher institutions, poor logical and critical thinking. The finding revealed the strategic measured to reduce Mathemaphobia as establishment of Mathematics club in schools, building Mathematics confidence in students and making Mathematics teaching and learning activity-oriented and learner-centered. The study recommended among others that Mathematics club should be established in schools, Mathematics teachers should be encouraged to attend conferences, seminar and workshops to upgrade and update their knowledge and only qualified Mathematics teachers should be allowed to teach Mathematics in schools.
Residual Stress Control Issues for Thermal Deposition of Polymers in SFF Processes

Controlling residual stress-induced warping and other tolerance losses is important for accurately creating parts by solid freeform fabrication (SFF). In this paper, results are presented from warping experiments on plate-shaped acrylonitrile butadiene styrene (ABS) specimens created by an extrusion process used in Shape Deposition Manufacturing (SDM). Experimental results are compared to predictions from both oneand two-dimensional types of residual stress models. In addition to SDM, methods and results from this study are applicable to a number of other solid freeform fabrication processes involving extrusion of polymers or polymer slurries. Results from polymer extrusion are compared with those from existing work on thermal deposition of metals. Unlike metals, polymer deposition shows essentially no stress reduction due to preheating by the deposition process. Due to a greater number of deposited rows, directionality of warping is also greater than in metals. Polymer deposition experiments show that a preheat temperature near the glass transition temperature is needed for essentially no warping. Comparison of predicted and measured curvatures show that a simple 1-D thermomechanical model does not predict warping magnitudes well, but does provide insight into trends in warping as a function of preheat temperature. The effects of successive material deposition are substantial in this process and a 2-D model that includes the effects of successively deposited rows can provide much more accurate curvature predictions. Introduction Solid freeform fabrication (SFF) processes allow the automated building of parts of complex geometry directly from 3-D computer-aided design (CAD) models without part-specific tooling or human intervention. Many SFF processes are currently in commercial use, while others are being refined at universities and national laboratories. There are several commercially available SFF systems, including Stereolithography (3-D Systems, http://www.3dsystems.com), PatternMaster and ModelMaker inkjet systems (Sanders Prototype, http://sandersprototype.com), Fused Deposition Modeling (Stratasys, Inc., http://www.stratasys.com) and Selective Laser Sintering (DTM Corporation, http://www.dtm-corp.com). Shape Deposition Manufacturing (SDM) is an SFF process currently under development at Carnegie Mellon University (Merz et al., 1994) and Stanford University (Fessler et al., 1996). The SDM process combines layer deposition with incremental computer numerically controlled (CNC) machining for accuracy. SDM utilizes a variety of materials including ceramics, waxes, polymers and metals. Several methods have been investigated for the deposition of these
RC Circuits based Distributed Conditional Gradient Method

We consider distributed optimization on undirected connected graphs. We propose a novel distributed conditional gradient method with (O(1/\sqrt{k})) convergence. Compared with existing methods, each iteration of our method uses both communication and linear minimization step only once rather than multiple times. We further extend our results to cases with composite local constraints. We demonstrate our results via examples on distributed matrix completion problem.
Factors Affecting Sales Employee Turnover in Hotel & Travel Industry: A Literature Review

Human Capital is the lifeline of an organization. In fact, until the development of artificial intelligence, it mayuse Human Capital to complete any desired action and to create any other form of capital. Human capital contributes knowledge, experience and the competencies to achieve the firm‟s goals. Thus, in an organizational decision making process is important to make the perfect choice on employee recruitment, employee development and employee retention. From the firm‟s point of view, taking the correct decision in hiring, training and retaining human capital is vital as the process involves time, effort and money. Employee turnover is usually not an immediate decision but a process that accumulates over time. Scholarly have stated that it usually starts with a shocking event, often a psychological contract breach. Many employees become disconnected from work long before they leave, and these employees have negative effects on the organization resulting in lowering of organizational commitment, absenteeism increases, productivity lowers. This paper examines previous researchers‟ findings, concepts with theoretical background to the Travel Agents and Operators of the hotel industry. Some of the theories related to the field such as Maslow‟s Hierarchy of needs, Two Factor Theory,Motivator Factors, Vroom‟s expectancy theory and some other related theories are presented here. Based on the findings of the literature three independent variables were selected for this study are Remuneration, Working Environment and Career development as the factors affecting employee turnover. Job Satisfaction is considered as the Mediatory Variable and Sales Employee turnover is the dependent variable. Furthermore based on the objectives of the study four hypothesis were developed. Employee turnover is a problem faced by most organization and is highly researchable topic in the current context. Therefore this study is useful for several parties as there has been no research conducted particularly on factors affecting Sales employee in the travel agents and operators segment.
Fuzzy-PID controller for PEM Fuel cell in Automobile Application

A fuel cell (FC) is an electro-chemical device that converts chemical energy to electrical energy by combining a gaseous fuel and oxidizer. New advances in membrane material, reduced usage of noble metal catalysts, and efficient power electronics have put the fuel cell system under the spotlight as a direct generator for electricity. Of all the varieties of fuel cells, the Proton Exchange Membrane (PEM) fuel cell has shown the effectiveness for automotive applications because of their lower operating temperature(50-100C)s and fast start-up times. They can reach efficiencies of above 60% at normal operating conditions. A typical PEM-FC provides up to 0.6 W/cm2 depending on the catalyst loading, the membrane and electrode material, and the reactant (oxygen O2 & hydrogen H2) concentration in the anode and cathode. To satisfy different power requirements, many FCs are connected electrically in series to form a FC stack (FCS). Maintaining a fuel cell system in correct operating conditions requires good controller. Based on the mathematical model of proton exchange membrane fuel cell, a fuzzy logic controller in the feed forward path and a PID controller in the feedback path was designed for the PEM FC to make it possible to output constant voltage .
Development of an Artificial Muscle from Coiled Polymer Fibers for Humanoid Robotics Applications

Humanoid robotics aims at developing anthropomorphic robots able to move in environments and to manipulate tools that are designed specifically for human beings. The high number of DOFs required in a humanoid robot demands for compact and high power-to-weight ratio actuators. Among all the possible technologies, artificial muscles have the additional advantages to be flexible, lightweight, and to provide linear movement suitable for a human-like robotic system. Existing types of artificial muscles used in robotics and other automated systems are expensive and technically limited due to hysteresis, scalability and performance efficiency. Inspired by a recent discovery of artificial muscles made of common twisted fishing line, the goal of this study is to develop a lowcost thermally controlled actuator suitable for humanoid robotic applications. The experimental setup consists of a twisted fiber of nylon with a diameter of 1mm pre-tensioned and connected in series with a force sensor. The material is heated up thanks to a NiChrome (NiCr) wire inserted axially into the polymeric fiber. The temperature is measured and controlled thanks to a small NTC thermistor kept in contact to the NiCr wire. Different experiments were conducted in order to measure the dynamic response of the artificial muscle as well as the force-temperature characteristic in static conditions.
Foam flow in model porous media

Foam are used in porous media to decrease the gas mobility (e.g. in enhance oil recovery or soil remediation), and consequently limits viscous fingering and channelization [1,2]. They are produced by coinjection of a gas phase and an aqueous solution of surfactants. The mechanisms responsible for mobility reduction involve various phenomena such as lamellae division, bubble formation and coalescence, interfacial friction, buoyancy segregation, capillary pressure heterogeneities, flow and saturation heterogeneities . Yet, there is no uniform picture that can account for high mobility reduction that are observed and reported in core-flood experiments. We propose in this work to use micromodels of porous media, made using standard microfluidics techniques, in order to be able to combine mobility reduction measurements with direct observations, and thus to hierarchize and better understand the respective roles of the above-mentioned mechanisms.
Evidence review of health benefits of rapeseed oil

Compared to other oils, rapeseed oil is considered to be a ‘healthy oil’ (Public Health England, 2016; World Health Organisation, 2018) with potential health benefits. This is because rapeseed oil is comparatively low in saturated fatty acids and high in monounsaturated fatty acids and polyunsaturated fatty acids including oleic acid (an omega-9 fatty acid), linoleic acid (an omega-6 fatty acid) and alpha-linolenic acid (an omega-3 fatty acid) (see Table 1). Rapeseed oil also contains plant sterols, carotenoids (pro-vitamin a, cold pressed oil only), vitamin K, and tocopherols (vitamin E) with the main health benefits from reduced cholesterol and increased cardioprotection (Gül and Amar, 2006; Lin et al., 2013). Most references to rapeseed oil are referring to canola (often low erucic acid and glucosinolates) or LEAR (low erucic acid and glucosinolate) types of oilseed rape variety. There are varying levels of evidence that support possible health benefits of rapeseed oil, from animal and in vitro studies through to human studies. These include regulation of circulating lipid profiles, effects on blood lipid profile, biomarkers of hemostatisis and inflammation, energy metabolism, insulin sensitivity and cancer and are summarised by the review article by Lin et al. (2013) and represented in Fig, 1.
Use Of Pesticides In North Tamil Nadu (Namakkal)-Impacts On Human Health And Persistence In Environment

The present review paper highlights the toxic effects of chlorpyrifos, an organophosphate (OP) pesticide on the living systems such as human beings, animals, plants, insects, fishes etc. due to its indiscriminate use. Majority of the farmers are unaware of pesticide types, level of poisoning, safety precautions and potential hazards on health and environment. Pesticide users such as farmers in developing nations like India are at a much higher risk of pesticide exposure due to lack of adequate safety measures and awareness. According to the latest estimate, the annual import of pesticides in India is about 0.6 Kg/ha and the average pesticides use in Tamilnadu is 5% only, which is very low as compared to other Indian states. In Namakkal district 39345 kg/year and 77690 l/year of pesticide was consumed for pest management. Cotton, paddy and cereals is the major pesticide consuming crop, in Namakkal 0.93% of cotton, 2% of paddy and 23% of cereals is produced. Mainly organophosphate are used as a pesticide, in this chlorpyrifos is frequently used pesticide. The knowledge of not only farmers and also peoples was limited regarding pesticide purchase, application and safety. Agricultural agency needs to be addressed properly for the pesticide nature. Pesticide misuse is being a serious concern mainly in the commercial crop production areas of agricultural products, where farmers are incidences of poisoning is also increasing because of intentional, incidental and occupational exposure and suffering from environmental pollution. The use of chlorpyrifos in India illustrates an ambiguous situation in which people are undergoing life-long exposures. There is an urgency to develop health education packages based on information, aptitude and practices and to propagate them within the wider reaches of the community in order to minimize the harmful exposure of chlorpyrifos in developing countries. Many studies showed that the chemical pollution of the environment has long-term effects on human life. It is therefore essential that manufacture, use, storage, transport and disposal of chemical pesticides be strictly regulated and create the awareness about the pesticide usage.
Low-temperature quantum transport in 2D materials

Starting from high quality CVD-grown single crystal graphene we fabricated both Hall-bars and Quantum Point Contacts which we extensively studied in the Quantum Hall (QH) regime showing full control over backscattering and equilibration of the topologically-protected edge states. Strain engineering was also explored as an alternative and original method to modify the electronic properties and induce quantizing pseudomagnetic fields. To this end, we pulled free-standing graphene membranes and studied strain using micro-Raman. Finally, we observe weak localization features in black Phosphorus from which information about elastic and inelastic scattering lengths is extracted. The anomalous temperature dependence of the inelastic scattering length is a signature of the in-plane crystalline anisotropy in black Phosphorus.
Brief Education and Academic Background Of Eke , Isreal Emenike from University Of Nigeria , Nsukka [ Unn ] , Enugu State , Nigeria

The paper was an examination of good governance at the local government level in Nigeria. The research methodology was essentially exploratory and therefore, depended on secondary data for the examination of issues of local government administration and good governance. The interest in good governance at this level of government arose out of the continued hue and cry of poor performance of the third tier of government which has attracted many conferences, workshops and dialogues about the future of this level of government. The paper explored good governance and found it to contain three essential elements-citizen participation, accountability and transparency. Analysis of institutional, organizational and constitutional measures‟ put in place to ensure good governance at this level of government, using institutional theory suggest that institutional differences-organizational and constitutional led to crises during the implementation of the measures. These crises have drastically reduced the realization of the three concepts of good governanceaccountability, transparency and citizen participation. We recommend that there should be proper harmonization of the activities of various institutions and measures aimed at achieving good governance. The higher tiers of government should provide the legislation, reforms and coordination necessary to cultivate the ethos of good governance at the local government level. Keys Words: Governance, Local Government, Accountability, Transparency, Citizen Participation, Institutional Theory. -------------------------------------------------------------------------------------------------------------------------------------Date of Submission: 05-03-2018 Date of acceptance: 23-03-2018 ------------------------------------------------------------------------------------------------------------------------------------
Improvising Purchase Prediction using hybrid approach utilizing Apache Mahout with C45. And Naive Bayes classifier

—Ecommerce has grown rapidly over the years. Many people are using popular channels to buy goods and services on the internet. It therefore becomes very important for shopping sites to accurately predict what customers want to buy to increase sales or increase customer satisfaction. Traditional algorithms like joint filtering are extremely popular in predicting user settings in the book, guide, or music area. But they face issues where rating data is sparse or not available in the shopping domain. Compared to the number of ratings on an ecommerce shopping site, the volume of many user click data is sufficient for the user's liking. So in this article, we propose a prediction model based on probability statistics that use user click behavior data
Income Inequality and Poverty among Households Gum Arabic Producers in Sheikan Locality

The aim of this paper was to assess income inequality and poverty situation among household gum Arabic producers in Sheikan locality. Structured questionnaire using stratified random sampling technique was used to gather households' poverty data from 13 villages located in three selected districts (Taggat, Umashira and Umsomaima). A total of 300 households representing 10% of population (3002 households) were interviewed. The Foster-Greer-Thorbecke (FGT) measurement, Gini coefficient and Lorenz curve were used to assess poverty incidence, gap, severity and income inequality. Results showed that the poverty incidence, poverty gap and poverty severity were 46%, 32% and 22%, respectively. Also the result of Gini coefficient of gum Arabic income inequality is estimated as 38.5%. To improve household food security, poverty and income equality in North Kordofan state, the study recommends developing of comprehensive capacity building programs for producers (tapping, collection and processing and gum quality); besides availability of sufficient credit sources and credits in time were required for stability of gum sector in the region. Keyword: Poverty, Income in-equality, gum Arabic, Sheikan locality
Relationship between cellular and systemic effects of pulsed Nd : YAG laser

4 ABSTRAcT Notwithstanding the wide diffusion of lasertherapy in clinics and numerous studies reported in literature, molecular mechanisms of interaction between laser and tissues are not well understood. The analysis of biological effects induced by laser radiation is rather complicated due to the wide possibility of setting instruments, the variability of applied protocols and the differences in treated tissues. in this review, we describe our studies on the cellular and molecular mechanisms at the basis of the systemic effects produced by treatment with pulsed Nd:YaG laser, that is known as Hilterapia. Starting from studies on photothermal effects, the hypothesis is that this type of laser cause an indirect photomechanical effect. The heat produced by transfer of radiation energy to the irradiated volume, diffuse into surrounding tissues, inducing temperature gradients which result in transitory modifications of mechanicalelastic properties of the extracellular microenvironment, thus changing mechanical forces acting on cells. considering these studies and knowing the key role of the extracellular matrix, not only as a structural support but also in maintaining tissue homeostasis, our experiments focused on the analysis of extracellular matrix molecules and cytoskeleton behavior, responsible of contact between cell and matrix and considered the best candidate to act as a mechanotrasducer. The data obtained have shown, in laser-treated cells, an increase in production of ecM molecules, such as aggrecan, collagen i and ii, and a reorganization of microtubules and actin microfilaments network. it is well know that similar effects are obtained when cells are subjected to mechanical stress. our data on absorption of Nd:YaG pulses by matrix components (proteins and polysaccharides) suggest that Nd:YaG pulses principally interact with the extracellular matrix, whose transitory deformation applies a mechanical stress to the cells. we then focused on the effect of pulsed Nd:YaG on endothelial function and tissue repair processes. in treated endothelial cells and fibroblasts, key elements of angiogenesis and tissue repair, we found overexpression of genes involved in the chemokine-mediated inflammatory pathways. Moreover, the treatment promoted the formation of ordered endothelial monolayers as well as ordered fibronectin fibril assembling. The findings indicate that treatment with Nd:YaG pulses has a stimulatory effect in the acute phase of inflammation and significant effect on the remodelling phase of tissue repair, also considering the important role that fibronectin plays in tissue structure regeneration. Therefore we can support that Hilterapia can efficaciously promote tissue repair processes.