scholarly journals The Ability of Students’ Scientific Argumentation of Acid-Base and Buffer Solution through Science Writing Heuristic (SWH)

2019 ◽  
Vol 5 (2) ◽  
pp. 166-177
Author(s):  
R Arizal Firmansyah ◽  
Linda Hesti Kumala
Keyword(s):  
Science Writing ◽  
Laboratory Work ◽  
Learning Approach ◽  
Scientific Argumentation ◽  
Acid Base ◽  
Buffer Solution ◽  
Science Writing Heuristic ◽  
Laboratory Report ◽  
Field Notes

AbstractMany students have found the difficulties to give proper evidence scientifically. Therefore, it is necessary to provide the learning approach model which guides students to argue scientifically on the laboratory work writing namely science writing heuristic (SWH). In this research, we tried to describe the quality of students scientific argumentation on acid-base and buffer solution laboratory work writing through mixed methods embedded concurrent. The research data was obtained through assessment rubric of ability scientific argumentation SWH formatted and field notes. The overall of ability scientific argumentation was moderate (63.60%).  From this research, we found that laboratory work writing with laboratory report SWH formatted can improve students’ ability on their scientific argumentation.AbstrakBanyak pelajar telah menemukan kesulitan untuk memberikan bukti yang tepat secara ilmiah. Oleh karena itu, perlu untuk menyediakan model pendekatan pembelajaran yang memandu pelajar untuk berdebat secara ilmiah tentang penulisan kerja laboratorium yaitu heuristik penulisan sains (SWH). Dalam penelitian ini, kami mencoba mendeskripsikan kualitas argumentasi ilmiah pelajar pada penulisan kerja laboratorium larutan asam-basa dan buffer melalui metode campuran yang disatukan secara bersamaan. Data penelitian diperoleh melalui rubrik penilaian kemampuan argumentasi ilmiah SWH yang diformat dan catatan lapangan. Keseluruhan argumentasi ilmiah kemampuan adalah sedang (63,60%). Dari penelitian ini, kami menemukan bahwa penulisan kerja laboratorium dengan laporan laboratorium yang diformat SWH dapat meningkatkan kemampuan pelajar dalam argumentasi ilmiah mereka.How to Cite : Firmansyah, R. A., Kumala, L. H. (2018).  The Ability of Students’scientific Argumentation of Acid-Base and Buffer Solution Through Science Writing Heuristic (SWH). TARBIYA: Journal of Education in Muslim Society, 5(2), 166-177. doi:10.15408/tjems.v5i2.10412.

Implementasi pendekatan science writing heuristic pada laporan praktikum berbasis multipel representasi terhadap kemampuan interpretasi

2020 ◽  
Vol 6 (2) ◽  
Author(s):  
Nur Sa'adah ◽  
Indah Langitasari ◽  
Imas Eva Wijayanti
Keyword(s):  
Multiple Representations ◽  
Thinking Skills ◽  
Science Writing ◽  
Learning Approach ◽  
Acid Base ◽  
Science Writing Heuristic ◽  
Quantitative Descriptive ◽  
The Right ◽  
And Control ◽  
High Order Thinking

Kemampuan interpretasi merupakan bagian dari kemampuan berpikir tingkat tinggi yang penting dimiliki oleh siswa untuk dapat menafsirkan dan menyimpulkan perolehan data agar siswa dapat memahami maknanya dengan baik. Kemampuan interpretasi siswa tergolong masih kurang sehingga diperlukan adanya pendekatan pembelajaran yang tepat. Penelitian ini bertujuan untuk mengetahui kemampuan interpretasi yang dimiliki siswa dalam laporan praktikum dengan format SWH yang melibatkan penggunaan kemampuan multipel representasi kimia pada konsep asam basa. Penelitian ini menggunakan desain penelitian deskriptif kuantitatif dengan melibatkan dua kelompok subjek yaitu eksperimen dan kontrol pada siswa kelas XI MIA. Hasil penelitian menunjukkan bahwa kemampuan interpretasi siswa dengan pendekatan SWH secara keseluruhan dikatakan baik yaitu dapat melatih kemampuan interpretasi siswa, meskipun tidak diperoleh peningkatan hasil penelitian. Implikasi penerapan pendekatan ini mampu mendorong siswa untuk menggunakan kemampuan multipel representasi kimia yang sekaligus dapat mengindikasikan kemampuan interpretasi siswa. Implementation of science writing heuristic approach in practicum reports based on multiple representations on interpretation skills AbstractInterpretation skills are part of high-order thinking skills that are important to have by students in order to interpret and conclude the acquistion of datas that students are can understand the meaning of the datas in good. The students’ interpretation skills are still less, so needed the right learning approach. This research aims to determine the interpretation skills of students in the SWH format practicum report which involves multiple representations in chemistry on the acid-base concepts. The research used the quantitative descriptive design involving two groups of a subject are experiment and control were students of class XI MIA. The results showed that students’ interpretation skills with the SWH approach as a whole got to be good it’s able to train students’ interpretation skills even didn’t get an improvement of research results. Implication application of this approach was able to encourage students to use multiple representations skill in chemistry which to can indicated students’ interpretation skills.

The Role of Tahfidzul Quran Learning to Build the Students’ Character at Madrasah Ibtidaiyah Istiqomah Sambas Purbalingga

2018 ◽  
Vol 2 ◽  
pp. 235-245
Author(s):  
Ikhwandi Arifin
Keyword(s):  
Elementary School ◽  
Primary School ◽  
Quality Of Education ◽  
Learning Approach ◽  
The Future ◽  
Character Building

This paper discusses the importance of the students ‘character building in the level of primary school/Islamic elementary school to face the globalization and information era. Education is the process of determining the nation’s character. Good or bad character of the nation in the future will be determined by the present quality of education. Building the character through Tahfidzul Quran learning approach is expected to be the main foundation to improve the degree and prestige of learners as the asset of the nation. This study aimed to describe the process of Tahfidzul Quran learning which included planning, organizing, doing action and monitoring the important role of learning itself to build the learners’ character, especially in Madrasah Ibtidaiyah Istiqomah Sambas Purbalingga.

Grand-Reaction Method for Simulations of Ionization Equilibria and Ion Partitioning in a Broad Range of pH and Ionic Strength

2019 ◽  
Author(s):  
Jonas Landsgesell ◽  
Oleg Rud ◽  
Pascal Hebbeker ◽  
Raju Lunkad ◽  
Peter Košovan ◽  
...  
Keyword(s):  
Mean Field ◽  
Coarse Grained ◽  
Reactive System ◽  
Acid Base ◽  
Buffer Solution ◽  
Reaction Method ◽  
Ionization Equilibria ◽  
Coarse Grained Simulations ◽  
Ph Range ◽  
Weak Polyelectrolytes

We introduce the grand-reaction method for coarse-grained simulations of acid-base equilibria in a system coupled to a reservoir at a given pH and concentration of added salt. It can be viewed as an extension of the constant-pH method and the reaction ensemble, combining explicit simulations of reactions within the system, and grand-canonical exchange of particles with the reservoir. Unlike the previously introduced methods, the grand-reaction method is applicable to acid-base equilibria in the whole pH range because it avoids known artifacts. However, the method is more general, and can be used for simulations of any reactive system coupled to a reservoir of a known composition. To demonstrate the advantages of the grand-reaction method, we simulated a model system: A solution of weak polyelectrolytes in equilibrium with a buffer solution. By carefully accounting for the exchange of all constituents, the method ensures that all chemical potentials are equal in the system and in the multi-component reservoir. Thus, the grand-reaction method is able to predict non-monotonic swelling of weak polyelectrolytes as a function of pH, that has been known from mean-field predictions and from experiments but has never been observed in coarse-grained simulations. Finally, we outline possible extensions and further generalizations of the method, and provide a set of guidelines to enable safe usage of the method by a broad community of users.<br><br>

scholarly journals Promoting the Quality of Life of Elderly during the COVID-19 Pandemic

2021 ◽  
Vol 18 (13) ◽  
pp. 6813
Author(s):  
Chia-Jung Lee ◽  
Yen Hsu
Keyword(s):  
Quality Of Life ◽  
Mental Health ◽  
Learning Experience ◽  
The Elderly ◽  
Learning Approach ◽  
Learning Center ◽  
Learning Centers ◽  
Technology Learning ◽  
The Impact

This study explored the technology learning model of the elderly in a senior learning center under the impact of the COVID-19 pandemic. Many senior learning centers were closed during the pandemic, and many of them adopted the mode of online education. However, problems such as decreased motivation and a lack of peer interaction still exist. To solve these problems, this study used the easy-to-implement calligraphy AR approach and E-book approach to conduct a quasi-experiment on the elderly of a calligraphy course offered by a senior learning center. The results show a higher learning motivation among the elderly who use calligraphy AR. The learning effectiveness and technology acceptance of the elderly in the E-book learning group were higher than those in the calligraphy AR group. The elderly mentioned that the E-book learning approach is more user-friendly. In general, in the face of the COVID-19 pandemic affecting the suspension of classes in senior centers, education through the development of technology has stimulated the growth of education in advanced learning centers. Through this kind of scientific and technological learning method, it will bring a whole new experience to the elderly. It can improve the stress relief methods, mental health, and quality of life of the elderly during the COVID-19 emergency shutdown, and provide a novel calligraphy technique learning experience for the elderly. Therefore, we believe that the calligraphy AR learning approach and the calligraphy E-book learning approach are practical and may promote quality of life and mental health of the elderly during the emergency closures due to COVID-19, providing elderly attendees with a novel calligraphy technology learning experience.

SUITABILITY OF ACID-SOLUBLE AND ACID-INSOLUBLE LEATHER FRACTIONS IN RADIOCARBON DATING

Radiocarbon ◽  
2020 ◽  
pp. 1-8
Author(s):  
Alyssa M Tate ◽  
Brittany Hundman ◽  
Jonathan Heile
Keyword(s):  
Radiocarbon Dating ◽  
Insoluble Fraction ◽  
Economic Life ◽  
Chemical Pretreatment ◽  
Acid Base ◽  
The Past ◽  
Acid Soluble Collagen ◽  
Method Of Production ◽  
Insight Into

ABSTRACT Leather has been produced by a variety of methods throughout human history, providing researchers unique insight into multiple facets of social and economic life in the past. Archaeologically recovered leather is often fragile and poorly preserved, leading to the use of various conservation and restoration efforts that may include the application of fats, oils, or waxes. Such additives introduce exogenous carbon to the leather, contaminating the specimen. These contaminants, in addition to those accumulated during interment, must be removed through chemical pretreatment prior to radiocarbon (14C) dating to ensure accurate dating. DirectAMS utilizes organic solvents, acid-base-acid (ABA) and gelatinization for all leather samples. Collagen yield from leather samples is variable due to the method of production and the quality of preservation. However, evaluating the acid-soluble collagen fraction, when available, provides the most accurate 14C dates for leather samples. In instances where gelatinization does not yield sufficient material, the resulting acid-insoluble fraction may be dated. Here we examine the effectiveness of the combined organic solvent and ABA pretreatment with gelatinization for leather samples, as well as the suitability of the acid-insoluble fraction for 14C dating.

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