Mathematics student teachers' modelling approaches while solving the designed Eşme Rug Problem

The purpose of the study is to analyze the mathematics student teachers' solutions on the Eşme Rug Problem through 7-stage mathematical modelling process. This problem was designed by the researchers by considering the modelling problems' main properties. The study was conducted with twenty one secondary mathematics student teachers. The data were collected from the participants' written solutions related to the problem. To analyze the students' answers through mathematical modelling process, the researchers compiled 7-stage mathematical modelling process from the literature. It was observed that the problem created an appropriate process for mathematical modelling. While examining the solutions of the participants who were informed about this 7-stage mathematical modelling process, it was generally observed that their solution approaches toward the problem decreased while progressing in modelling stages. © Authors

Halofantrine Hydrochloride (Halfan) Induced Toxicity of the Pancreas in Wistar Rats

The toxicity of halofantrine hydrochloride to the pancreas of wistar rats (Rattus norvegicus) was studied using twenty five male wistar rats divided into five groups of five rats per group. Group A (control group) was given only clean water. Groups B. C. D and E received 0.7; 1.4; 2.1 and 2. 8g/kg Body not of halofantrine hydrochloride administered orally every six hours for three times (complete dose) respectively. The results showed Odema and swelling of pancreatic acini cells and obliteration of interstitial spaces. This toxicity effect was found to be dose dependent and significantly different from the normal integrity of the cells observed in the control experiment: The result underscored a possible toxic effect halofantrine when administered into man. Based on the result obtained, there was need for caution on the use of halfan in the treatment of malaria, particularly in cases of drug abuse. It is suggested that further studies are required to elucidate the implication of this toxicity to both the endocrine and exocrine functions of the pancreas

Assessment of Psychophysiological Differences of West Point Cadets and Civilian Controls Immersed within a Virtual Environment

Abstract. An important question for ecologically valid virtual environments is whether cohort characteristics affect immersion. If a method for assessing a cer-tain neurocognitive capacity (e.g. attentional processing) is adapted to a cohort other than the one that was used for the initial normative distribution, data ob-tained in the new cohort may not be reflective of the neurocognitive capacity in question. We assessed the psychophysiological impact of different levels of immersion upon persons from two cohorts: 1) civilian university students; and 2) West Point Cadets. Cadets were found to have diminished startle eyeblink amplitude compared with civilians, which may reflect that cadets experienced less negative affect during the scenario in general. Further, heart rate data re-vealed that Cadets had significantly lower heart rates than Civilians in the “low ” but not “high ” immersion condition. This suggests that “low ” immersion conditions may not have the ecological validity necessary to evoke consistent affect across cohorts

Halofantrine Hydrochloride (Halfan) Induced Toxicity of the Pancreas in Wistar Rats

The toxicity of halofantrine hydrochloride to the pancreas of wistar rats (Rattus norvegicus) was studied using twenty five male wistar rats divided into five groups of five rats per group. Group A (control group) was given only clean water. Groups B. C. D and E received 0.7; 1.4; 2.1 and 2. 8g/kg Body not of halofantrine hydrochloride administered orally every six hours for three times (complete dose) respectively. The results showed Odema and swelling of pancreatic acini cells and obliteration of interstitial spaces. This toxicity effect was found to be dose dependent and significantly different from the normal integrity of the cells observed in the control experiment: The result underscored a possible toxic effect halofantrine when administered into man. Based on the result obtained, there was need for caution on the use of halfan in the treatment of malaria, particularly in cases of drug abuse. It is suggested that further studies are required to elucidate the implication of this toxicity to both the endocrine and exocrine functions of the pancreas

Examining of model eliciting activities developed by mathematics student teachers

The purpose of this study is to examine the model eliciting activities developed by the mathematics student teachers in the context of the principles of the model eliciting activities. The participants of the study conducted as a case study design were twenty one mathematics student teachers working on seven groups. The data collection tools were the developed model eliciting activities and semi-structured interviews. The model eliciting activities and the transcriptions of the interviews were deeply analyzed based on the principles. The results showed that while one group's activity was not a model eliciting activity, the ones of two groups were appropriate to the all principles. Other model eliciting activities were completely or partly appropriate to the principles. It was seen that the reality and model construction principles were binding role in developing these activities. The self-assessment and construct documentation principles were directly related to each other. The construct share ability and reusability, and effective prototype principles were the principles which were associated with the others and could be elicited effectively by tracking future implementations. © 2017 Journal on Mathematics Education. All rights reserved