A Review on the Impact of Waste Materials in Performance of Self-Compacting Concrete

Self-compacting concrete (SCC) was founded in 1986, from these days until now it's used profusely due to its different features like one of them the sustainability by using the waste materials will be achieved that will lead to saving the environment and cost-effective. The study aims to investigate and discuss different waste materials in producing SCC. Wastes materials in this research were divided into two parts, the replacement waste materials to the aggregate and the second type are the replacement materials to the cement with showing the impact of this waste materials on the concrete properties. The study shows different types of test methods that used to achieve the SCC by test the properties of the filing ability, passing ability and segregation potential that are especially recommended to achieve the SCC mixture. The research shows previous studies that used waste materials in producing SCC and it includes different types of cases with the effect of these materials on the properties of the concrete. The current studies are not enough to make an official procedure for using the waste materials in producing SCC, the practical studies must be carried out on the new waste materials that not used before that maybe will help to produce a durable SCC and other types of concrete to achieve for an official procedure to produce different types of concrete with a different types of waste material

The effect of using a program depending on argument based inquiry approach via “write- to- learn strategy” on 8th grade students’ abilities of forming scientific mental models

The Purpose of this study is to investigate the effect of using a program depending on argument based inquiry approach via “write- to- learn strategy” on 8th grade students’ abilities of forming scientific mental models. As well as the effect of the interaction between argument based inquiry approach via write to learn strategy method of teaching, and gender on 8th grade students’ abilities of forming scientific mental models. The study was conducted on a purposive sample of 8th grade students (females and males) enrolled at public schools in Jerusalem district. The schools are: Bethany Secondary School for Girls and Al Ma’ahad Al Arabi School for Boys during the second semester of the academic year 2016\2017. The Sample consisted of 152 students of the 8th grade (71 females and 81 males). Students from both schools were assigned to experimental and control group randomly. The experimental group was taught a whole unit by the argument based inquiry approach via “write-to-learn strategy”, while the control group was taught by the traditional method. The experiment lasted for two months. The researcher has prepared an instrument for the study, Self Mental Model Exam. Content validity and reliability was done for it. A pre and post test was done for all of the participants to measure the effect of using a program depending on argument based inquiry approach via “write- to- learn strategy” on 8th grade students’ abilities of forming scientific mental models. The means, standard deviations, and (1-way ANCOVA) test were used in the study. The findings of the study showed that there are statistically significant differences at (α≤ 0.05) in the mean scores of 8th grade students’ abilities to form mental models due to method of teaching in favor of the experimental group, there are statistically significant differences at (α≤ 0.05) in the mean scores of 8th grade students’ abilities to form mental models due to gender in favor of males and there are statistically significant differences at (α≤ 0.05) in the mean scores of 8th grade students’ abilities to form mental models due to the interaction between method of teaching and gender in favor of males in the experimental group. In the light of these results the researcher recommends using the argumentation via “write-to-learn strategy” in teaching science due to its effect in improving students’ skills

Attitudes of Palestinian Undergraduate Students Towards Native and Non-Native English Language Teachers and Their Relation to Students’ Listening Ability

The purpose of this study is to investigate the attitudes of Palestinian undergraduate students towards native and non-native English language teachers and their relation to students' listening ability. To achieve this purpose and to answer the research questions and test the hypotheses, the researchers adopted both the descriptive and inferential approaches. For collecting data, a questionnaire and a listening test were designed and distributed among 120 Palestinian undergraduate students to find out their attitudes towards both their NES and NNES and their relation to students' listening ability. After the statistical analysis, the major findings of the study revealed that attitudes of Palestinian undergraduate students towards Native and Non-Native English language teachers were moderate in all items and sections, except for the teaching culture which was found to be with low attitudes for native teachers. The findings also pointed out that the listening ability of Palestinian undergraduate students towards native and non native English language teachers were higher for those who studied with native teachers compared to those who studied with non native teachers. The findings also highlighted that there were significant differences in the mean scores of the listening ability for Palestinian undergraduate students towards native and non native English language teachers due to university. Based on the research findings some recommendations are finally presented. The researchers concluded that students generally have positive attitudes towards both teacher types (Native and Non-Native English language teachers), but the highest degree of the respondents’ preferences and attitudes are for and towards non native. Furthermore, the relation between attitudes towards both teacher types and listening ability isn't found. There is more than one explanation for this, may be students have an innate ability to listen to many types of speakers and comprehend and being guided through the process of listening may lead the students to get rid of the feelings of fear from speakers when they listen. Keywords: Attitudes, Palestinian undergraduate students, native and non-native, language teachers, listening abilit

Eutectic Mixture of Myristyl Alcohol - Eicosane and the Thermal Reliability of this Binary System as Phase Change Material

Myristyl alcohol ( L14), eicosane and their binary mixtures as phase change materials (PCM) were investigated by differential scanning calorimetry (DSC). The eutectic mixture was determined to be 65% L14- 35% eicosane with melting temperature 29.79 ºC and latent heat 225.5 J/g which makes it suitable for solar applications. A (0-360 ) cycles of heating and cooling ( to approximate one year duration ) were conducted to study the thermal reliability of the eutectic mixture . (DSC) analysis showed approximately constant melting temperature with fluctuation no more than (0.16 ºC) and the change in latent heat after 360 cycle of heating and cooling was less than ( 2.2%).

Attitudes of Palestinian Undergraduate Students Towards Native and Non-Native English Language Teachers and Their Relation to Students’ Listening Ability

The purpose of this study is to investigate the attitudes of Palestinian undergraduate students towards native and non-native English language teachers and their relation to students' listening ability. To achieve this purpose and to answer the research questions and test the hypotheses, the researchers adopted both the descriptive and inferential approaches. For collecting data, a questionnaire and a listening test were designed and distributed among 120 Palestinian undergraduate students to find out their attitudes towards both their NES and NNES and their relation to students' listening ability. After the statistical analysis, the major findings of the study revealed that attitudes of Palestinian undergraduate students towards Native and Non-Native English language teachers were moderate in all items and sections, except for the teaching culture which was found to be with low attitudes for native teachers. The findings also pointed out that the listening ability of Palestinian undergraduate students towards native and non native English language teachers were higher for those who studied with native teachers compared to those who studied with non native teachers. The findings also highlighted that there were significant differences in the mean scores of the listening ability for Palestinian undergraduate students towards native and non native English language teachers due to university. Based on the research findings some recommendations are finally presented. The researchers concluded that students generally have positive attitudes towards both teacher types (Native and Non-Native English language teachers), but the highest degree of the respondents’ preferences and attitudes are for and towards non native. Furthermore, the relation between attitudes towards both teacher types and listening ability isn't found. There is more than one explanation for this, may be students have an innate ability to listen to many types of speakers and comprehend and being guided through the process of listening may lead the students to get rid of the feelings of fear from speakers when they listen

The Effect of Using the “SQP2RS via WTL” Strategy through Science Context to 10th Graders’ Reading Comprehension in English in Palestine

The study aimed at investigating the effect of using the “SQP2RS via WTL” strategy through science context to 10th graders’ reading comprehension in English in Bethlehem district in Palestine. The study has been applied on a purposeful sample of 10th grade students at public schools in Bethlehem district in the academic year 2015/2016. The sample included (139) students (61 males and 78 females) at AL-Awda Basic School for Girls, Bethlehem Secondary Boys’ School. Students were assigned to experimental and control groups, the experimental group was taught by using the “SQP2RS via WTL” strategy, while the control group was taught by the traditional method. The researchers have prepared a reading comprehension achievement test. Content validity and reliability were established for the test. The experiment has lasted three months, a pre-test and post-test were performed using the reading comprehension achievement test to measure the effect of using the “SQP2RS via WTL” strategy. The means and standard deviation, (3-way ANCOVA) test, were used in the study. The findings of the study showed that there were statistically significant differences in the mean scores of 10th graders’ reading comprehension in the English language due to the teaching method in favor of the experimental group, the level of pre-achievement in favor of the high achievement group, the interaction between group and gender in favor of the female in the experimental group, the interaction between group and level of pre-achievement in favor of the high achievement in the experimental group, the interaction between gender and level of pre-achievement in favor of the male in the high achievement group and the interaction between group, gender and level of pre-achievement in favor of the high achievement male students in the experimental group. And there were no statistically significant differences in the mean scores of 10th graders’ reading comprehension in the English language due to gender. In the light of the results of the study, training programs should be offered to train teachers on using the “SQP2RS via WTL” strategy, students should be provided with opportunities to practice the strategy, and more studies should be conducted on different variables and different populations. Keywords: Effect, SQP2RS, WTL, strategy, science context, 10th graders’, reading comprehensio

A functionalized enol lactone containing a protected α-amino acid

The crystal structure of N-(3,9-dimethyl-4-phenyl-2,5-dioxo-3,4-dihydro-2H,5H-pyrano[3,2-c]chromen-3-yl)-N-methylbenzamide methanol monosolvate, C28H23NO5·CH3OH, has been determined at room temperature by X-ray diffraction. Structural parameters are discussed with reference to ab initio calculations