Students' Joint Reasoning about Gas Solubility in Water in Modified Versions of a Virtual Laboratory

2015 ◽  
Vol 5 (4) ◽  
pp. 67-77
Author(s):  
Göran Karlsson
Keyword(s):  
Conceptual Understanding ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Scientific Concept ◽  
Design Experiment ◽  
Gas Solubility ◽  
Natural Phenomena ◽  
Solubility In Water ◽  
Physiological Conditions ◽  
Virtual Laboratories

Laboratory work in science education is essential for students' conceptual understanding of natural phenomena. Computer-simulated laboratory experiments have been proposed to facilitate traditional laboratory work. A virtual laboratory was designed to enable students to collaboratively discover the concept of gas solubility in water at different physiological conditions. The virtual laboratory was developed through a design experiment involving three successive versions with different guiding structures. Analysis of 12 dyads' reasoning about gas solubility in water revealed that the problem was not primarily for the students to realise how the volume of gas changed, but rather to understand the concept of solubility of gases. It was also observed how the guiding structures within the three different versions influenced the students' reasoning about the concept. The analysis indicates that the affordances of virtual laboratories might, to a certain extent, enhance joint discovery of a scientific concept.

Virtual Laboratory Work for Discovering Gas Solubility in Water

2018 ◽  
pp. 281-297
Author(s):  
Göran Karlsson
Keyword(s):  
Laboratory Experiment ◽  
Scientific Reasoning ◽  
Virtual Laboratory ◽  
Laboratory Work ◽  
Design Experiment ◽  
Gas Solubility ◽  
Solubility In Water ◽  
Hands On ◽  
Solubility Of Gases

Compared to hands-on experiments, virtual laboratory work has the advantage of being both more cost- and time-effective, but also invokes questions about its explorative capacities. The aim of this chapter is to study how students' scientific reasoning was contingent on altered guiding structures within a virtual laboratory experiment. The virtual laboratory was developed through a design experiment involving three successive versions with altered guiding structures. Analysis of 12 dyads' reasoning about gas solubility in water revealed that the problem was not primarily for the students to realize how the volume of gas changed, but rather to understand the concept of solubility of gases. It was also observed how the guiding structures within each version influenced the students' reasoning about the studied phenomenon in certain trajectories.

scholarly journals THE USE OF VIRTUAL LABORATORY TO IMPROVE STUDENTS' CONCEPTUAL UNDERSTANDING IN ACID BASE TITRATION SUBJECT

2019 ◽  
Vol 3 (1) ◽  
pp. 43
Author(s):  
Erni Erni
Keyword(s):  
Data Analysis ◽  
Conceptual Understanding ◽  
T Test ◽  
Virtual Laboratory ◽  
Acid Base ◽  
Virtual Laboratories ◽  
Analysis Technique ◽  
Acid Base Titration ◽  
Final Data ◽  
The Mean

The research has been conducted to figure out the use of virtual laboratories on students' conceptual understanding of acid-base titration subject at SMAN 1 Tambusai. The study was an experimental research with one group pretest-posttest design. The sample consisted of one class, XI IPA2, a class that was treated with a virtual laboratory. The data analysis technique used was the t-test. Based on the results of the final data processing using the t-test, it was obtained that sig 5 ≤ 0.05; where 0,000 ≤ 0.05; so it was concluded that there were significant differences between the mean scores of the pretest and posttest. This shows that there is an increase by the use of virtual laboratories towards the students' conceptual understanding

scholarly journals ANALYSIS OF DEVELOPMENT NEEDS VIRTUAL LABORATORY FOR LEARNING VOCATIONAL SCHOOL PRACTICES IN THE PANDEMIC TIME COVID-19

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Eskawati Musyarofah Bunyamin ◽  
Eveline Siregar Siregar ◽  
Dwi Kusumawardani Kusumawardani
Keyword(s):  
Health And Safety ◽  
Vocational School ◽  
Virtual Laboratory ◽  
Ministry Of Education ◽  
School Practices ◽  
Face To Face ◽  
Need Analysis ◽  
Virtual Laboratories ◽  
Face To Face Learning ◽  
Open Face

During the COVID-19 pandemic, schools did not open face-to-face learning services. The Ministry of Education and Culture has issued a policy learning from Home (BDR) to support the principles of the Education Policy in the COVID-19 Pandemic that the health and safety of students, educators, education personnel, families, and the community is the top priority. However, learning in Vocational School (SMK) is mostly based on practice so that BDR activities cannot be implemented. One thing that is done to overcome this is that some practicum activities can be executed using multimedia known as virtual laboratories. The aim of this study is to conduct a need analysis for the development of a virtual laboratory.  Needs analysis is carried out to gather data about gaps and needs as well profiles of students that can be used as a basis or reference in developing virtual laboratory at the next stage. Data collection was carried out by means of observation, interviews, and distributing questionnaires. The results showed that a virtual laboratory was needed to support practical learning for vocational students.

scholarly journals Representações Quantitativas em Laboratórios Virtuais para o Ensino de Química

2021 ◽  
Vol 22 (2) ◽  
pp. 152-159
Author(s):  
Alessandro Félix Pascoin ◽  
José Wilson P Carvalho
Keyword(s):  
Qualitative Research ◽  
Knowledge Construction ◽  
Teaching And Learning ◽  
Learning Processes ◽  
Virtual Laboratory ◽  
Virtual Labs ◽  
Chemistry Teaching ◽  
Virtual Laboratories ◽  
Peircean Semiotics ◽  
Quantitative Nature

Resumo Os laboratórios virtuais utilizados no ensino de Química se constituem importantes recursos didáticos para o avanço dos processos de ensino e aprendizagem, ao passo que podem contribuir para ações de mediação na construção do conhecimento. A presente pesquisa teve como objetivo analisar as representações quantitativas que estão presentes nas interfaces de laboratórios virtuais à luz da Semiótica Peirceana. É uma pesquisa qualitativa exploratória, realizada no repositório portal PhET–Interative Simulation. No percurso da pesquisa foram encontrados 51 aplicativos, desses seis exibiam características de laboratório virtual e três foram semioticamente analisados. Os resultados indicam que três laboratórios apresentam disposições parcialmente satisfatórias nas representações quantitativas que abordam. Esses podem vir a contribuir para o fortalecimento do ensino da Química, por meio de ilustrações, simulações e a participação interativa do estudante. Quanto às possibilidades, esses oferecem diferentes ambientes, formatos e modelos para o estudo desta ciência. Também foram encontradas limitações como a insuficiência de signos iconográficos de ordem quantitativa considerados indispensáveis na conjuntura conceitual de determinados tópicos da Química. As indicações desta pesquisa são para se pensar a respeito dos signos que vão representar a natureza quantitativa da Química, transformando os desafios em possibilidades para os processos de ensino e aprendizagem desta ciência. Palavras-chave: Semiótica. Ensino de Química. Laboratórios Virtuais. Abstract Virtual laboratories used in chemistry teaching are important didactic resources for the advancement of teaching and learning processes, while they can contribute to mediation actions in the knowledge construction. This research aims to analyze the quantitative representations that are present in the virtual laboratories interfaces in light of Peircean semiotics. It is an exploratory qualitative research, conducted at the portal PhET – Interative Simulation. During the research, 51 applications were found, of these, 6 exhibited virtual laboratory characteristics and three were semiotically analyzed. The results indicate that three laboratories have partially satisfactory arrangements in the quantitative representations they address. They can contribute to the strengthening of chemistry teaching through illustrations, simulations and interactive student participation. As for the possibilities they offer different environments, formats and models for the study of this science. Limitations were also found as the insufficiency of quantitative iconographic signs considered indispensable in the conceptual conjuncture of certain topics of chemistry. The indications of this research are to think about the signs that will represent the Chemistry quantitative nature, turning the challenges into possibilities for the teaching and learning processes of this science. Keywords: Semiotics. Chemistry Teaching. Virtual Labs.

scholarly journals Gold (III) Derivatives in Colon Cancer Treatment

2022 ◽  
Vol 23 (2) ◽  
pp. 724
Author(s):  
Agata Gurba ◽  
Przemysław Taciak ◽  
Mariusz Sacharczuk ◽  
Izabela Młynarczuk-Biały ◽  
Magdalena Bujalska-Zadrożny ◽  
...  
Keyword(s):  
Protein Structures ◽  
Thioredoxin Reductase ◽  
Structural Similarity ◽  
In Vivo Studies ◽  
Antitumor Effects ◽  
Solubility In Water ◽  
Physiological Conditions ◽  
Drug Candidates ◽  
New Methods

Cancer is one of the leading causes of morbidity and mortality worldwide. Colorectal cancer (CRC) is the third most frequently diagnosed cancer in men and the second in women. Standard patterns of antitumor therapy, including cisplatin, are ineffective due to their lack of specificity for tumor cells, development of drug resistance, and severe side effects. For this reason, new methods and strategies for CRC treatment are urgently needed. Current research includes novel platinum (Pt)- and other metal-based drugs such as gold (Au), silver (Ag), iridium (Ir), or ruthenium (Ru). Au(III) compounds are promising drug candidates for CRC treatment due to their structural similarity to Pt(II). Their advantage is their relatively good solubility in water, but their disadvantage is an unsatisfactory stability under physiological conditions. Due to these limitations, work is still underway to improve the formula of Au(III) complexes by combining with various types of ligands capable of stabilizing the Au(III) cation and preventing its reduction under physiological conditions. This review summarizes the achievements in the field of stable Au(III) complexes with potential cytotoxic activity restricted to cancer cells. Moreover, it has been shown that not nucleic acids but various protein structures such as thioredoxin reductase (TrxR) mediate the antitumor effects of Au derivatives. The state of the art of the in vivo studies so far conducted is also described.

scholarly journals Mobile Virtual Laboratory as Innovative Strategy to Improve Learners’ Achievement, Attitudes, and Learning Environment in Teaching Chemistry

2021 ◽  
Vol 2 (5) ◽  
pp. 398-400
Author(s):  
Resty C. Samosa
Keyword(s):  
Learning Environment ◽  
Positive Impact ◽  
The Body ◽  
Virtual Laboratory ◽  
Teaching Chemistry ◽  
Innovative Strategy ◽  
Virtual Laboratories ◽  
Achievement Attitudes ◽  
Positive Learning Environment ◽  
Laboratory Experiences

As our world becomes more technologically advanced, research suggests that technology-rich learning environments support students as well. Mobile Virtual Laboratories can be used to replicate physical laboratories and augment the incorporation of technology inside science classrooms in an attempt to provide students with laboratory experiences that would not otherwise be available in high school settings. This study measured the effectiveness of mobile virtual laboratory as innovative strategy to improve learners’ achievement, attitudes, and learning  environment in teaching chemistry. The study utilized one-group pretest–posttest design. The innovative strategy is calculated using this design by measuring the difference between the pretest and posttest scores, attitudes and learning  environment in teaching chemistry. The study revealed that the utilization of the innovative strategy mobile virtual laboratory in teaching chemistry showed that learners have a strong positive attitude. More so, the learners have a strong positive learning environment when exposed to the innovative strategy mobile virtual laboratory based on the six domain of learning environment in teaching chemistry. As shown by the significantly higher mean in the posttest than in the pretest, the innovative strategy mobile virtual laboratory had a positive impact on the learners' achievement. Consequently, the learners exposed to the mobile virtual laboratory in teaching chemistry are significantly differ in pretest and posttest results. The findings of this study have the potential to reassure educational professionals, contribute to the body of research within the field of chemistry achievement, attitudes, and learning  environment, and encourage further research into the efficacy of mobile virtual laboratories as a teaching tool.

“How Nice That I Could Love Someone”: Science Fiction Film as a Virtual Laboratory

2020 ◽  
Author(s):  
Frederieke Y. Jansen
Keyword(s):  
Science Fiction ◽  
Narrative Structure ◽  
Virtual Laboratory ◽  
Virtual Laboratories ◽  
Meaningful Relationship ◽  
Pros And Cons ◽  
The Way

While we already know that clearly utopian or dystopian depictions of human-machine relationships in science fiction film can be effective rhetorical models that shape our ideas of HRI, this paper argues that sci-fi films, like Marjorie Prime (2017) and Be Right Back (2013), can also function as more neutral virtual laboratories that allow viewers to actively explore the pros and cons of those relationships in more detail. This paper specifically explores both Marjorie Prime and Be Right Back for the way they evoke questions or ideas about what it means to be human, what it means to interact with AI, and what a meaningful relationship between these two can bring. By following a neoformalist analysis, I will show how these cases continuously present us with devices that force us to reassess the role of robots in our lives. They do this by using deceptive, reflective, and confrontational strategies within characters, cinematography, narrative structure and setting.

Development and Analysis of Virtual Laboratory as an Assistive Tool for Teaching Grade 8 Physical Science Classes

2021 ◽  
pp. 326-349
Author(s):  
Maria Ndapewa Ntinda ◽  
Titus Haiduwa ◽  
Willbard Kamati
Keyword(s):  
Physical Science ◽  
Virtual Laboratory ◽  
Virtual Laboratories ◽  
Alternative Approach ◽  
Hands On ◽  
Science Laboratories ◽  
Science Labs ◽  
Science Classes ◽  
Future Work ◽  
Grade 8

This chapter discusses the development of a virtual laboratory (VL) named “EduPhysics,” an assistive software tailored around the Namibian Physical Science textbook for Grade 8 learners, and examines the viability of implementing VL in education. It further presented reviews on the role of computer simulations in science education and teachers' perspective on the use of EduPhysics in physical science classrooms. The chapter adopted a mixed method with an experimental research design and used questionnaires and interviews as data collection tools in high school physical science classes. The analysis found that there are limited resources in most physical science laboratories. Computer laboratories, however, are well equipped and have computing capacities to support the implementation of VL. It was concluded that virtual laboratories could be an alternative approach to hands-on practical work that is currently undertaken in resource-constrained physical science labs. For future work, augmented reality and logs will be incorporated within EduPhysics.

Low-Cost Virtual Laboratory Workbench for Electronic Engineering

2010 ◽  
Vol 1 (4) ◽  
pp. 1-17
Author(s):  
Ifeyinwa E. Achumba ◽  
Djamel Azzi ◽  
James Stocker
Keyword(s):  
Resource Constraints ◽  
Low Cost ◽  
Virtual Laboratory ◽  
Electronic Engineering ◽  
Virtual Lab ◽  
Time Space ◽  
Virtual Laboratories ◽  
Laboratory Component ◽  
Undergraduate Engineering Education ◽  
Laboratory Experiences

The laboratory component of undergraduate engineering education poses challenges in resource constrained engineering faculties. The cost, time, space and physical presence requirements of the traditional (real) laboratory approach are the contributory factors. These resource constraints may mitigate the acquisition of meaningful laboratory experiences by students, which is especially true in developing countries. Virtual laboratories can be used to complement the traditional laboratory to enhance students’ laboratory experience. In extreme cases of lack of resources, the virtual lab can be used as an alternative laboratory . Although some research on the implementation of virtual laboratories has occurred, more efforts are required because of the diverse experiential needs and requirements of the engineering curriculum. This paper presents a low-cost, web-based virtual laboratory workbench for use as part of undergraduate electronic engineering courses. Some distinguishing features of the virtual workbench are that students can undertake curriculum-based laboratory activities in a realistic manner; it integrates a Bayesian Network-based assessment structure for the assessment of students’ performance; and it affords the instructor flexibility in designing laboratory exercises.

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