Chemical understanding and graphing skills in an honors case-based computerized chemistry laboratory environment: The value of bidirectional visual and textual representations

2008 ◽  
Vol 45 (2) ◽  
pp. 219-250 ◽  
Author(s):  
Yehudit J. Dori ◽  
Irit Sasson
Keyword(s):  
Chemistry Laboratory ◽  
Laboratory Environment ◽  
Textual Representations ◽  
Case Based

Penanganan Alat Dan Bahan Yang Baik Dalam Rangka Menunjang Kegiatan Di Laboratorium Kimia

METANA ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. 58
Author(s):  
Raharjo Raharjo ◽  
Sri Harjanto
Keyword(s):  
Chemistry Laboratory ◽  
Laboratory Equipment ◽  
Chemical Laboratory ◽  
Laboratory Environment ◽  
Handling System ◽  
Research Activities

Fasilitas alat dan bahan di lingkungan laboratorium kimia bagi mahasiswa yang sedang menyelesaikan tugas penelitian merupakan suatu hal yang tidak bisa terpisahkan, dan sangat diperlukan keberadaanya. Maka  sistem kelola, cara penanganan dengan  baik dan benar terutama  yang berhubungan dengan bahan kimia ataupun alat gelas dan instrumen mulai dari proses pengadaan, penerimaan , pengemasan, penyimpanan sampai penyaluran, penggunaan sesuai dengan tata kelola yang baik dan benar, juga ditunjang pelayanan yang memadai akan sangat membantu dalam rangka penyelesaian kegiatan penelitian mahasiswa Tugas Akhir di laboratorium kimia. Handling of good equipments and materials to order to supply activities studensts at the chemical laboratory  Equipment and materials facilities in chemical laboratory environment for students who are completing research tasks is an inseparable, and indispensable condition. Therefore, good and proper handling system, especially those related to chemicals or glassware and instruments starting from the procurement, receiving, packaging, storage until distribution, use in accordance with good and correct governance, also supported by adequate services will very helpful in the completion of research activities of Final Final students in the chemistry laboratory.

Learning environment in the undergraduate chemistry laboratory courses in Beirut

2018 ◽  
Vol 8 (1) ◽  
pp. 08-20
Author(s):  
Hanan Arnous ◽  
Zalpha Ayoubi
Keyword(s):  
Learning Environment ◽  
Undergraduate Students ◽  
Significant Proportion ◽  
Private University ◽  
Chemistry Laboratory ◽  
Laboratory Environment ◽  
Undergraduate Chemistry ◽  
Laboratory Courses ◽  
Chemistry Learning ◽  
Material Environment

The undergraduate chemistry laboratory is an ideal place for meaningful learning to occur, and the laboratory work is considered as an integral part of most chemistry courses; however, a significant proportion of laboratory experiments remain highly prescriptive and fail to challenge undergraduate students. This study investigated the chemistry laboratory environment among 170 undergraduate students at a private university in Beirut, Lebanon. Data were collected using the Chemistry Laboratory Environment Inventory with its both versions: Actual Chemistry Laboratory Environment Inventory and Preferred Chemistry Laboratory Environment Inventory. The findings of this study showed that the students prefer a chemistry learning environment with greater levels of integration and material environment, but less level of open-endedness. Suggestions for improving chemistry laboratory learning environments are provided. Keywords: Chemistry, laboratory, undergraduate courses, learning environment.  

Representation in case-based reasoning

2005 ◽  
Vol 20 (3) ◽  
pp. 209-213 ◽  
Author(s):  
RALPH BERGMANN ◽  
JANET KOLODNER ◽  
ENRIC PLAZA
Keyword(s):  
Feature Vector ◽  
Case Based Reasoning ◽  
Textual Representations ◽  
Structured Representations ◽  
Vector Representations ◽  
Traditional Approaches ◽  
Hierarchical Representations ◽  
Case Based

A case in case-based reasoning is a contextualized piece of experience, which can be represented in various forms. Traditional approaches can be classified into three main categories: feature vector representations, structured representations, and textual representations. More sophisticated approaches make use of hierarchical representations or generalized cases. For particular tasks such as design and planning highly specific representations have been developed.

scholarly journals An Interactive and Self-instructional Virtual Chemistry Laboratory

2016 ◽  
Vol 11 (07) ◽  
pp. 70
Author(s):  
Laiali Almazaydeh ◽  
Ismail Younes ◽  
Khaled Elleithy
Keyword(s):  
Developing Countries ◽  
Virtual Environment ◽  
Positive Response ◽  
Chemistry Laboratory ◽  
Virtual Laboratory ◽  
Educational Technologies ◽  
Educational Institutions ◽  
Laboratory Environment ◽  
Students Satisfaction

Virtual laboratory is becoming one of the most significant educational technologies due to financial challenges which often required construction of physical laboratories, particularly in educational institutions in developing countries. This paper presents an integrated virtual environment to help individual learners to enhance the practical learning of chemistry fundamentals. Through this environment, the learner will navigate, visualize and simulate a real laboratory environment and its associated processes. The proposed laboratory interface and curriculum were tested on students to measure their satisfaction with the quality of developed laboratory. The results of the evaluation showed a positive response effect on the students’ satisfaction.

scholarly journals DIFFICULTIES OF UNDERGRADUATE STUDENTS IN THE ORGANIC CHEMISTRY LABORATORY

2012 ◽  
Vol 42 (1) ◽  
pp. 74-81
Author(s):  
Maria Gabriela Lorenzo ◽  
Ana Maria Reverdito ◽  
Mercedes Blanco ◽  
Alejandra Salerno
Keyword(s):  
Organic Chemistry ◽  
Undergraduate Students ◽  
Experimental Work ◽  
Data Gathering ◽  
Learning Difficulties ◽  
Opportunity To Learn ◽  
Chemistry Laboratory ◽  
Laboratory Environment ◽  
Organic Chemistry Laboratory

Experimental work supposes a unique opportunity to learn procedural contents. However, the conditions and constraints to learn procedures have not been sufficiently discussed or investigated in a laboratory environment. Students` difficulties in organic chemistry laboratory at university are described and explained. A case study (n=15 undergraduate students) was performed. The study was carried out in an actual laboratory class, using different ways for data gathering: 1) A comparison between declarative knowledge of students about experimental work and observations of procedures in class. 2) An evaluation of the effect of laboratory work on the knowledge of students related with the assembly of the apparatus. This research suggests that students’ difficulties in performing experimental work are deeply related to a deficient interrelationship between conceptual and methodological frameworks. Key words: experimental work, learning difficulties, organic chemistry laboratory, procedural contents, university.

Towards Automation of Manual Operations in a High School Chemistry Laboratory

2008 ◽  
Author(s):  
Igor M. Verner ◽  
Leonid B. Revzin
Keyword(s):  
Learning Environment ◽  
Laboratory Experiments ◽  
Chemistry Laboratory ◽  
High School Chemistry ◽  
Laboratory Practice ◽  
Laboratory Environment ◽  
Performance Time ◽  
Positive Learning Environment ◽  
Computer Controlled ◽  
Automated Titration

This paper proposes a learning environment in which manual operations of school chemistry laboratory experiments, such as titration and aliquoting, are automated by means of computer controlled devices. The educational study focuses on characteristics of learning in the automated laboratory environment. Pilot teaching indicated that using automation devices significantly reduces the performance time of titration laboratory work. The students also noted that automated titration experiments are more simple and accurate. Therefore, automation of manual operations in laboratory practice has been found to provide a very positive learning environment.

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