Crossflow microfiltration of sugarcane juice: effects of processing conditions and juice quality

Sugarcane juice with passion fruit pulp was clarified using microfiltration under different T (temperature), P (pressure), and V (tangential velocity). The effects of these processing parameters were evaluated applying a rotational central composite experimental design (RCCD) and response surface methodology (RSM). The tests were performed at a filtration pilot plant using a polyamide hollow-fiber membrane with an average pore diameter of 0.4 µm and filtration area of 0.723 m². In addition, the resistances to the permeate flux during the microfiltration were investigated according to the series resistance. The final permeate flux ranged from 7.05 to 17.84 L·h- 1·m- 2. There was a rapid decline in flux (50%) in the initial stages of microfiltration. T and V were the major variables responsible for the flux increase. The concentration polarization showed the greatest influence on the flux decline, and highest values for the flux decline rate (λ) were found when low pressures were used. In the clarified juice there was a reduction in the contents of total solids, proteins, vitamin C, and acidity, while the soluble solids, pH, and ash contents did not change. Finally, membrane process could produce high quality filtered sugarcane juice with substantial flux and increased luminosity improving organoleptical properties.

A classroom-based investigation of reciprocal teaching at the grade seven level

This study assessed the effectiveness of a reciprocal teaching program as a method of teaching reading comprehension, using narrative text material in a t.ypical grade seven classroom. In order to determine the effectiveness of the reciprocal teaching program, this method was compared to two other reading instruction approaches that, unlike rcciprocal teaching, did not include social interaction components. Two intact grade scven classes, and a grade seven teacher, participated in this study. Students were appropriately assigned to three treatment groups by reading achievement level as determined from a norm-referenced test. Training proceeded for a five week intervention period during regularly scheduled English periods. Throughout the program curriculum-based tests were administered. These tests were designed to assess comprehension in two distinct ways; namely, character analysis components as they relate to narrative text, and strategy use components as they contribute to student understanding of narrative and expository text. Pre, post, and maintenance tests were administered to measure overall training effects. Moreover, during intervention, training probes were administered in the last period of each week to evaluate treatment group performance. AU curriculum-based tests were coded and comparisons of pre, post, maintenance tests and training probes were presented in graph form. Results showed that the reciprocal group achieved some improvement in reading comprehension scores in the strategy use component of the tests. No improvements were observed for the character analysis components of the curriculum-based tests and the norm-referenced tests. At pre and post intervention, interviews requiring students to respond to questions that addressed metacomprehension awareness of study strategies were administered. The intelviews were coded and comparisons were made between the two intelVicws. No significant improvements were observed regarding student awareness of ten identified study strategies . This study indicated that reciprocal teaching is a viable approach that can be utilized to help students acquire more effective comprehension strategies. However, the maximum utility of the technique when administered to a population of grade seven students performing at average to above average levels of reading achievement has yet to be determined. In order to explore this issue, the refinement of training materials and curriculum-based measurements need to be explored. As well, this study revealed that reciprocal teaching placed heavier demands on the classroom teacher when compared to other reading instruction methods. This may suggest that innovative and intensive teacher training techniques are required before it is feasible to use this method in the classroom.

A cognitive schematic paradigm for expository essay writing in secondary schools

The methodology outlined in this study for teaching exposit ory writing to advanced (five year phase) grade eleven students is based on the assumption that writing as a problem solving strategy is a high level cognitive skill . In adhering to this assumption, a cognitively based schematic organizer known as a cross-classification chart was tested for its effectiveness a t the planning stage of the writing process . Results were not significant in any of the three components that were evaluated; however , a post- hoc analysis undertaken because of recorded observed data indicated a significant difference in the mean score on the Organization component for the treatment subgroup using the cross- classification organizer . Furthermore, the treatment group's positive response from the attitude survey towards planning writing is encouraging enough that replication and extension of the application of schema theory to wri ting should be pursued in cross-section and longitud i nal studies.

An exploration of transformation theory and the western tradition: a critical evaluation of a graduate studies class

This qualitative study is an exploration of transformation theory, the Western tradition, and a critical evaluation of a graduate studies class at a university. It is an exploration of assumptions that are embedded in experience, that influence the experience and provide meaning about the experience. An attempt has been made to identify assumptions that are embedded in Western experience and connect them with assumptions that shape the graduate class experience. The focus is on assumptions that facilitate and impede large group discussions. Jungian psychology of personality type and archetype and developmental psychology is used to analyze the group experience. The pragmatic problem solving model, developed by Knoop, is used to guide thinking about the Western tradition. It is used to guide the analysis, synthesis and writing of the experience of the graduate studies class members. A search through Western history, philosophy. and science revealed assumptions about the nature of truth, reality, and the self. Assumptions embedded in Western thinking about the subject-object relationship, unity and diversity are made explicit. An attempt is made to identify Western tradition assumptions underlying transformation theory. The critical evaluation of the graduate studies class experience focuses upon issues associated with group process, self-directed learning, the educator-learner transaction and the definition of adult education. The advantages of making implicit assumptions explicit is explored.

Business leadership in the classroom

This action research assesses a framework that assists business educators in promoting leadership within a classroom. It is designed to better prepare students to assume leadership and fill the "leadership gap" in business. Two classes of 2nd-year community college business students participated in running and managing their own business community as teams of sales professionals by developing and practicing their own individual leadership for 28 weeks during their sales courses. The intent was to assess the development of leadership resulting from the implementation of the "Business Leadership in the Classroom" framework. This framework balances leadership principles to simulate a business environment with the practical elements of a learning community under the facilitation of an experienced business educator. The action research approach was used to assess and adjust approaches to business leadership on a continuous basis throughout the research. Data were collected from 61 students based on journals, surveys, peer group reviews, and my (facilitator) reflective journal.The findings reveal that both individual and collective business leadership views and practical skills developed over time. A business leadership mind-set evolved that ranged from a general awareness of the importance of leadership, to a conscious and deliberate use of individual leadership. Areas important in building a progression of leadership included: leadership teams, membership roles, weekly leadership teams, peer feedback, and activity-based learning. Emerging themes included leadership, leadership style, teamwork, as well as influence and motivation. The research framework was effective in supporting the development of business leadership but required some adjustments. These included increased structure and feedback mechanisms. Interpretation of the findings demonstrates the importance of real-world practical education in the classroom. Results show how focusing on a single mind-set such as business leadership, can result in enormous individual growth and development. When business students are encouraged to act as real businesspeople, managing their own learning, the results are effective in preparing them for the business world. All participants expressed their leadership in different ways based on personality and individual strengths. There was an overwhelming and, in some cases, passionate interest in leadership. The use of action research with a range of data collection methods provides a way to measure and track individual student learning and to generate adjustments to the research framework design and learning approaches. The findings generate implications and recommendations to continue this research further. Key recommendations center around how to ensure leadership development is sustained, including improved approaches to heighten the real-world feel of the classroom. Specifically, the use of leadership goals and action plans for each individual participant and an active use of outside business resource people as contacts for participants is recommended.

Changes in education and student-centred learning as related to senior secondary school English

The main purpose of this thesis is to t r ace broadly the educational changes in the past two decades showing a shift of emphasis from a teacher-directed, content-centred philosophy of teaching to a self-directed, student-centred mode of learning. The major justification for an Independent or an Individualized Learning programme with emphasis on "the response to literature approach" is 2 to produce the independent learner. Comprehensive r eading and t he use of t he ERIC system reveal widespread educational thought and practice related t o Individualization and Independent Study as a really democratic way of learning with freedom, independence and responsibility.

Elements that contribute to staff nurses' commitment to lifelong professional development

This research explored the elements that contribute to staff nurses' commitment to lifelong professional development. This exploration has been undertaken to provide insights into those factors that motivate individuals to continue their education for professional development and for clinical practice improvement. This study was conducted in an acute care hospital in Southern Ontario, and investigated the thoughts and experiences ofhealth care staffworking within that setting. A qualitative case study was undertaken which involved the collection of interview, document, and class observation data. Two exemplary clinical nurse educators and two motivated, professionally committed staffnurses were interviewed during the study. Teaching document review and observation ofclasses involving the clinical nurse educators were conducted to facilitate triangulation of fmdingswith data sources and strategies. These participants provided rich data that were captured in field notes and coded for conceptual meaning. Emerging from the data were the identification ofthree major elements of influence that contribute to staffnurses' commitment to lifelong professional development. Identified within the three intersecting spheres of influence upon staff nurses' lifelong commitment to professionalleaming were the environment, the clinical nurse educator, and the staff nurse. This research explored the intersecting spheres of influence and the elements within the partnership model ofprofessional education for staff nurses.

Student perceptions of the writing process

Based on the critical research paradigm and using a mix of methodologies, this study examined student perceptions of the process approach used to teach writing. A class of 19 ESL students in an academic writing class at a small university paliicipated in the study. As collaborators in the study, they assessed their personality types using the PET Type Check (Crantoll & Knoop, 1995) and tlleir learning styles using Kolb'sLearning Styles Inventory (1976). Interviews, classroom observations, and journals provided a data base for case studies llilQ teacher reflection. Results indicated that students perceived the prewriting step of brainstonning and peer review as most useful. Student perceptions of the tasks and course and implications for theory and practice are examined.

The development of self directedness in public health nurses

This qualitative study examined the perceived thoughts, feelings and experiences of seven public health nurses employed in a southern ontario health department, regarding the initial phase of the introduction of a self-directed orientation program in their place of employment. A desire to understand what factors facilitate public health nurses in the process of becoming self-directed learners was the purpose of this study. Data were gathered by three methods: 1) a standard open-ended interview was conducted by the researcher with each nurse for approximately one hour; 2) personal notes were kept by the researcher throughout the study; and 3) a review of all pertinent health department documents such as typed minutes of meetings and memos which referred to the introduction of the self-directed learning model was conducted. The meaning of the experience for the nurses provided some insights into what does and does not facilitate public health nurses in the process of becoming self-directed learners. Implications and recommendations for program planners, nurse administrators, facilitators of learning and researchers evolved from the findings of this study.

The effectiveness of explicit strategy instruction on the top level structure of a text

Thesis (M.Ed.)-- Brock University, 1995.

The effects of computer assisted interactive fiction on the development of reading comprehension in grade five students

This study was undertaken in order to determine the effects of playing computer based text adventure games on the reading comprehension gains of students. Forty-five grade five students from one elementary school were randomly assigned to experimental and control groups, and were tested with regard to ability, achievement and reading skills. An experimental treatment, consisting of playing computer based interactive fiction games of the student's choice for fifteen minutes each day over an eight-week period, was administered. A comparison treatment engaged the control group in sustained silent reading of materials of the student's choice for an equal period of time. Following the experimental period all students were post-tested with an alternate form of the pre-test in reading skills, and gain scores were analysed. It was found that there were no significant differences in the gain scores of the experimental and control groups for overall reading comprehenSion, but the experimental group showed greater gains than the control group in the structural analysis reading sub-skill. Extreme variance in the data made generalization very difficult, but the findings indicated a potential for computer based interactive fiction as a useful tool for developing reading sl

The generation effect and word learning: a test of the effect of the language experience approach versus the text approach in the acquisition of new reading vocabulary

A class of twenty-two grade one children was tested to determine their reading levels using the Stanford Diagnostic Reading Achievement Test. Based on these results and teacher input the students were paired according to reading ability. The students ages ranged from six years four months to seven years four months at the commencement of the study. Eleven children were assigned to the language experience group and their partners became the text group. Each member of the language experience group generated a list of eight to be learned words. The treatment consisted of exposing the student to a given word three times per session for ten sessions, over a period of five days. The dependent variables consisted of word identification speed, word identification accuracy, and word recognition accuracy. Each member of the text group followed the same procedure using his/her partner's list of words. Upon completion of this training, the entire process was repeated with members of the text group from the first part becoming members of the language experience group and vice versa. The results suggest that generally speaking language experience words are identified faster than text words but that there is no difference in the rate at which these words are learned. Language experience words may be identified faster because the auditory-semantic information is more readily available in them than in text words. The rate of learning in both types of words, however, may be dictated by the orthography of the to be learned word.

The person inside the nurse : the professional socialization of baccalaureate nursing students

The goal ofthis research was to gain an understanding ofthe process ofprofessional socialization by accessing role meaning ofstudents engaged in a BScN program. Students from each ofthe four years and faculty members from the school ofnursing volunteered as participants. G. Kelly's (1955) Personal Construct Theory provided the framework to determine awareness and constructed meanings. A reflective tool, called LifeMapping, was adapted and utilized to relate student experiences within education that have attributed to nurse role meaning. Focus group interviews verified data interpretation. Students are informed oftheir choice to study nursing through part-time and volunteer work, secondary school cooperative placements. Descriptions reveal that choices are tested and both positive and negative aspects ofthe role observed. Bipolar images of good and bad nurses seem to be context-related. These images may establish biases in choices related to learning experiences. The person inside ofeach aspiring nurse interprets, revises and understands experiences to incorporate individual meaning into their value and belief structures. Students are aware ofchanges and descnbe them as developments that occur personally up to Year ill and role-image changes that begin in Year II. The major difficulty that students encountered was descnbed as negative attitudes towards their anticipated role. Humanistic-interactionist philosophies are echoed in student accounts of learning experiences. Growth and role development corresponds to process factors of small group, problem-base learning.

The status of drama in education in an Ontario school board

Drama in education has been describea- as a valuable pedagogical medium and methodology, enriching child development in the cognitive, skill, affective, and aesthetic domains, and spanning all areas of curriculum ~ oontent. However, despite its considerable versatility and cost-effectiveness, drama appears to maintain low status within the education system of ontario. This thesis investigated teacher perceptions of both the value and status of drama in education in one ontario school board. Data were gathered in the form of an attitude questionnaire, which was devised for the purpose of this research and administered to a stratified cluster sample of 126 teachers employed in the board's elementary schools. These data were then used to examine teacher perceptions based on their knowledge, attitudes, and self-reported behaviour in the classroom. Teacher characteristics of gender, teaching assignment, years experience, and courses taken in drama were also analyzed as potential determinants of teacher attitudes towards drama in education. Results of the study confirmed apparent discrepancy between teacher perceptions of the value of drama and its current educational status. It was indicated that what teachers value most about drama is its capacity to enhance creativity, social skills, empathy, personal growth, and problem-solving ability among students. Teachers attribute its low status both to school and board priorities of time and resources, and to deficiencies in their knowledge and confidence in the planning, implementation, and evaluation of drama in the classroom. Teacher subgroup analysis revealed no significant differences in attitudes towards the status of drama in education; it did, however, suggest that both teachers who have studied drama and teachers with between ten and twenty years experience are most likely to value drama more highly than their colleagues. Recommendations proposed by the study include the provision of increased - time and resource allotment for drama within the elementary curriculum as well as increased teacher training at both faculty of education and board inservice levels.

Values and the classroom teacher

This is a descriptive study of elementary school teachers' perceptions of values transmitted in classrooms. Through circulation of a survey to teachers in Public and Separate Schools in the "Golden I-Iorseshoe" distt-ict of SOLtthern Ontario (e}{clLtding Toronto), it was found that teachers do see themselves as promoting values which tend to be conceptual or knowledge-based and receptive and pertain to self-perception and personal growth. They also show a tendency t.o Lise nlore conceptL\al teachi ng strategies SLieri as discussiona The respondents had no clear opinion regarding student disposition toward values but did feel very influential in developing that disposition. Demographic factors of gender, age, teaching division and teaching experience affected the responses to the surveYa The study was undertaken to describe a very sensitive area in education in the hope of moving closer toward a more effective school system II.