Remedial Process for Negative Numbers Subtraction Operation: A Computerized Diagnostic Assessment

This study is a part of our research on remedial process for Negative Numbers subtraction operation. It was based on our previous study which involved 124 students aged 14 years old and five Mathematics teachers from secondary schools from a district in Malaysia which identified a diagnostic assessment for subject domain. It was found that conventionally to implement such diagnostic assessment in school setting was possible but the time and work load to analyse and make visual the misconceptions information was impossible as the sample size increases for mathematics teachers. Thus, this study was about computerization of that diagnostic assessment which would enable students to analyse their own ability in subject domain at anytime and anyplace. This system provides immediate analysis result which would save time and work load of remediation process and repeated as many times as each students wants to and be more responsible in monitoring their own misconception based on the analysis result obtained

Evaluation of cord bilirubin and hemoglobin analysis in predicting pathological jaundice in term babies at risk of ABO incompatibility

Background: Cord bilirubin and hemoglobin analysis helps not only in predicting the pathological jaundice in ABO incompatibility but also useful for early referral and intervention for better outcome. Aim of this study is to evaluate the cord blood bilirubin and hemoglobin analysis in predicting pathological hyperbilirubinemia in newborn at risk of ABO incompatibility.Methods: In this descriptive study conducted in Government Stanley medical college between January 2016-June 2016, A positive or B positive babies born to O positive mothers with birth weight >2.5 kgs and gestational age >37 weeks were included. A total of 191 babies were studied. Cord bilirubin, reticulocyte count, hemoglobin and fourth day bilirubin were evaluated and data was analysed using Pearson’s Chi square and ANOVA.Results: Out of 191 babies, 25 (13%) did not develop any jaundice, 122 (64%) developed physiological jaundice and 44 (23%) had pathological jaundice. The mean cord bilirubin and cord hemoglobin values of newborn who did not develop jaundice were 1.35mg/dl and 15.3g/dl while the values among pathological jaundice were 3.15mg/dl and 14.97g/dl. Conclusions: Babies with cord bilirubin >1.8mg/dl and hemoglobin <15.1gm/dl are more prone for pathological hyperbilirubinemia

Incorrect thinking process prediction for negative numbers subtraction operation involving positive with negative integers

This study was divided into two parts. The first part was to identify the incorrect answer produced by the respondents for each item and its frequency. Then, the second part was to predict the incorrect thinking process with respect to its frequencies that respondent might have adapted in solving such sentence questions incorrectly. The respondents of this study were five mathematics teachers and 124 students aged 14 years old from Malaysian secondary school. The finding shows types of mistakes made by the students for each type of items tested and the prediction of incorrect thinking process respectively. This paper focused on the third category: subtraction operation involving positive with negative integers. The findings revealed that in depth analysis into the students thinking process is an essential knowledge for teachers to re-assess their teaching and correct students their misconceptions

Polarization of 57S aluminium used as galvanic anode in 2M NaOH

Aluminium possesses attractive properties like high energy density, high negative potential and low cost, so that it can be developed into successful galvanic anodes in primary batteries. Aluminium shows high rate of self corrosion and gassing in alkaline solutions. Incorporating inhibitors, complexing agents or addition agents in the electrolyte, can reduce self corrosion of aluminium. Formation of a zincate coating on the surface of aluminium has been tried, with a view to improve the electrochemical properties of aluminium and their alloys as galvanic anodes in primary alkaline batteries. The addition of polyaniline inhibits the corrosion of 57S aluminium in solution 2M NaOH containing 0.2M zinc oxide. From thepolarization experiements we found that the inhibitor is found to effect both anodic and cathodic processes, but anodic processes to a greater extent. the inhibition of corrosion of 57S. Aluminium in solution containing 2M NaOH, 0.2M zinc oxide and 700ppm of polymer can be attributed to the formation of protective film on the aluminium surface. From the anodic cathodic polarization study, it has been observed that 57S aluminium by immersion in 2M NaOH, containing 0.2M ZnO and 700ppm polymer is found to produce the material suitable for uses as galvanic anodes in alkaline solutions

Novel polymeric inhibitor fo corrosion of 575 a um-nium in 2M NaOH solutions

Purpose -The purpose of this paper is to show how to develop inhibition 575 aluminium in 2M NaOH solution. Design/methodology/approach -The approach is used to measure gravimetric and polarization measurements. Findings -The results of the paper clearly reveal that the 0.2 M ZnO with 700 ppm polyaniline in N-methyl-2-pyrrolidone solution is found to offer inhibition up to 71.2 per cent. Originality/value -The paper deals with the development of newer inhibitor based on polyaniline. Gravimetric and galvanostatic methods were employed to evaluate inhibition efficiency