scholarly journals Fabrication of Digital Harmonic Vibration Practicum Using Phototransistor Sensor with Arduino-Uno Microcontroller

2021 ◽  
Vol 7 (3) ◽  
pp. 468-473
Author(s):  
Marjoni Imamora Ali Umar ◽  
Dany Kurniawan ◽  
Novia Lizelwati
Keyword(s):  
Harmonic Vibration ◽  
Time Constraints ◽  
Development Research ◽  
Physics Students ◽  
Average Percentage ◽  
Percentage Difference ◽  
Valid Data ◽  
Arduino Uno ◽  
The Relationship ◽  
D Model

The problem in the harmonic vibration practicum is in calculating time accurately. Commonly, the time counter used was a stopwatch, but it was unable to provide valid data. As a result, the student has difficulty seeing the relationship between concepts with practical results in the laboratory. To overcome these problems, in this study, we developed a harmonic vibration practicum tool that is equipped with a digital timer using an Arduino Uno microcontroller as a light sensor. An Arduino can be programmed via a PC according to the wishes of the developer. This study was development research using a 4-D model (Define-design-develop-dissemination). The define and design stages respectively to find problems in the harmonic vibration practicum tool. The tool is finally designed and then calibrated, validated, and practical. The calibration results show that the percentage difference for repetition measurement and comparison that values with theory was 0.008% and 3.98%, respectively. In addition, the validation results show an average percentage of 87% or very valid. For practicality, the result through a limited test of Physics students of IAIN Batusangkar in the second semester shows a very practical response with a percentage of 85.96%. Due to time constraints, the dissemination stages have not been carried out in this study.

scholarly journals PENGEMBANGAN LKPD BERBASIS CHEMO-EDUTAINMENT KELARUTAN DAN HASIL KALI KELARUTAN SMA NEGERI 1 MANDOR

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Rachma Daniyati ◽  
Tuti Kurniati ◽  
Rizmahardian Ashari Kurniawan
Keyword(s):  
Learning Outcomes ◽  
Field Trial ◽  
Teaching Material ◽  
Development Research ◽  
Main Field ◽  
Student Responses ◽  
Average Percentage ◽  
Validity Criteria ◽  
D Model ◽  
Very High

This development research is motivated by the low learning outcomes of students and the lack of motivation students in learning chemistry, especially on solubility and solubility result at SMAN 1 Mandor. This study aims to produce worksheets based on chemo-edutainment student on solubility and solubility result. This type of research is the development of the ADDIE Research and Development (R&D) model. The instruments used were validation sheets, questionnaire sheet for teacher and student responses and test sheets for pretest and posttest questions. The analysis shows the validity criteria obtaine by the validator 1.0 value with a very valid category. The results of the questionaire respons of primary field trial students obtained an average percentage value of 88.57 %. The efective criteria for chemo-edutainment based worksheets were seen from the pretest and posttest results of students calculated using N-gain formula, the value obtained in the main field trial is 0.85 (very high). Based on these results, it can be conculuded that the development of chemo-edutainment based student worksheets is feasible to be used as teaching material on solubility material and solubility results in class XI IPA in SMAN 1 Mandor.

Pengembangan Perangkat Pembelajaran Berbasis TPACK pada Materi Sifat Koligatif Larutan untuk Meningkatkan Keterampilan Berpikir Kritis Siswa

2014 ◽  
Vol 3 (1) ◽  
Author(s):  
Titin Mairisiska ◽  
Sutrisno Sutrisno ◽  
Asrial Asrial
Keyword(s):  
Critical Thinking ◽  
Lesson Plan ◽  
Thinking Skills ◽  
Critical Thinking Skills ◽  
Learning Activities ◽  
Development Research ◽  
Average Percentage ◽  
The Relationship ◽  
Colligative Properties

TPACK based learning devices development research on the colligative properties is intended to develop Lesson Plan (RPP) and student’s activity sheets (LKS) in the form of a flip page ebook, apply the RPP and LKS and analyze the relationship among components of TPACK compiler. This research done by applying 4D Thiagarajan, Semmel and Semmel  Model, that has been modified. The results indicated on learning activities at the meeting I 92%, meeting II dan III 93,4%, meeting IV dan V 86,7%, meeting VI 86,1%, meeting VII 91,4%, all of them belong to the category of “highly optimized”. Students gave positive responses to the learning and products developed. The average percentage of student’s critical thinking skills as a whole is 66.3% which includes the category of “good”.

scholarly journals The Development of M-Learning Based on Integration-Interconnection of The Accounting Cycle of Trading Company

2018 ◽  
Vol 3 (1) ◽  
pp. 56
Author(s):  
Putri Adisti Kamadita ◽  
Nujmatul Laily
Keyword(s):  
Independent Learning ◽  
Accounting Students ◽  
Development Research ◽  
Average Percentage ◽  
Trading Company ◽  
The Media ◽  
Practice Questions ◽  
The Relationship ◽  
Further Development ◽  
Expert Validation

<p>This study aims to produce a mobile learning application based on the topic of integration-interconnectionofthe trading company. The application is useful as an alternative to independent learning that can support the learning of accounting students .This research was a development research which refers to the development procedure of Borg and Gall which was modified into seven steps. Data in this study were collected using a questionnaire. The results of the study showed that the percentage of eligibility of the material expert validator was 73%, the media expert validator was 98%, the integration-interconnection expert validator was 75%, and the respondent was 79%. The average percentage of eligibility is 81 %. This number means that the application is very feasible to use. Some suggestions that can be given for further development of the application are by making indicators of specific expert validation measurements with supporting references; provide competency updates to the application and add new practice questions; the presentation of the verses of the Qur'an and Hadith can be added so that the students' knowledge of the relationship between the Qur'an, Hadith,and accounting becomes wider; as well as product testing, so that the level of effectiveness of learning media products can be known.</p>

scholarly journals Pengembangan Bentuk Soal Tipe Benar-Salah dalam Penilaian Kelas Sekolah Menengah Pertama

2019 ◽  
Vol 8 (2) ◽  
pp. 78-87
Author(s):  
Aswin Hermanus Mondolang ◽  
Cosmas Poluakan ◽  
Satyano W. Mongan ◽  
Dewi S. Umacina
Keyword(s):  
Design Development ◽  
Average Percentage ◽  
Model Research ◽  
Simple Machines ◽  
Valid Data ◽  
Class Viii ◽  
Student Grades ◽  
D Model ◽  
Answering Questions ◽  
True False

AbstractThis research is motivated by the existence of speculation of students in answering the true-false type of questions. The purpose of this study was to develop questions true-false type in consept of physics  on work and simple machines in class VIII SMP which can minimize speculation. This research and development uses a Research & Development (R & D) model from SivasailamThiagarajan, Dorothy S. Semmel, and Melvyn I. Semmel consisting of 4 main drums determined (defining), design (design), development (development), and spread (spread). Data collection was obtained through interviews, questionnaire instruments and student grades. The results of validation by evaluation experts and material through questionnaires obtained an average percentage of 92.5% with a valid category. And from the results of trying to 32 students, the questions developed can minimize student speculation in answering questions. Thus, a class that uses the form of B-S questions that are equipped with Y-TY options can measure students more objectively than the B-S type questions without Y-TY choices.AbstrakPenelitian ini dilatarbelakangi oleh adanya spekulasi siswa dalam menjawab soal objektif tipe benar-salah. Tujuan dari penelitian ini adalah untuk mengembangkan soal objektif  tipe benar-salah dalam penilaian kelas materi fisika usaha dan pesawat sederhana pada siswa kelas VIII SMP  yang dapat meminimalisir spekulasi. Penelitian ini menggunakan model research & development (R&D) dari Sivasailam Thiagarajan, Dorothy S. Semmel, dan Melvyn I. Semmel (1974) yang terdiri dari 4 tahap utama yaitu define (pendefinisian), design (perancangan), develop (pengembangan), dan disseminate (penyebaran). Data penelitian diperoleh melalui teknik wawancara, instrumen angket, dan nilai siswa. Validasi instrumen oleh pakar evaluasi dan pakar materi melalui instrumen angket diperoleh rerata persentase sebesar 92,5% dengan kategori valid. Data nilai siswa dari hasil uji coba kepada 32 siswa, soal yang dikembangkan dapat meminimalisir spekulasi siswa dalam menjawab soal. Dengan demikian penilaian kelas yang  menggunakan bentuk soal tipe B-S yang dilengkapi dengan pilihan Y-TY dapat mengukur pemahaman siswa secara lebih objektif dibandingkan dengan bentuk Soal tipe B-S tanpa pilihan Y-TY. 

An Investigation on Bending Capacity of Support Stiffness Wall-Slab Structural System by Using Single Layer and Double Layer of Rebar for Residential Project

2012 ◽  
Vol 446-449 ◽  
pp. 3670-3673
Author(s):  
Hooi Min Yee ◽  
Siti Isma Hani Ismail
Keyword(s):  
Double Layer ◽  
Concrete Strength ◽  
Single Layer ◽  
Concrete Cover ◽  
Structural System ◽  
Average Percentage ◽  
High Rise ◽  
Percentage Difference ◽  
Average Percentage Difference ◽  
Bending Capacity

Wall-slab structural system is a system suitable for use in the field of high-rise building where the main load resisting system is in the form rigidly connected wall slab member. Concrete vertical walls may serve both architecturally partitions and structurally to carry gravity and lateral loading. Moment transfer of joint is an important aspect for proper structurally functioning of wall-slab system. Hence, the main aim of this study is to investigate experimentally the effect of reinforcement details in the wall on bending capacity for support stiffness in wall-slab system for residential project in Malaysia. A total of six wall specimens were tested based on the specification given by the project contractor. Three of this specimens consisted single layer of rebar while another three specimen consisted of double layer of rebar. The size of the wall-slab’s specimens is 1000mm in length (L), 1080mm in width (W), 1000mm in height (H) and 80mm in thickness (T). The average concrete strength was 23.49MPa with Grade 30N/mm2 and the average yield strength of R5 bar was 817MPa. The predicted bending capacity at failure is in the range from 5.36kNm to 7.12kNm, depending on actual concrete cover. The bending capacity at failure for single layered of rebar in wall for specimen 1, 2 and 3 were found to be 3.59kNm, 3.81kNm and 3.15kNm, respectively. The bending capacity at failure for double layered of rebar in wall for specimen 1, 2 and 3 were 5.50kNm, 6.31kNm and 7.00kNm, respectively. The average percentage difference in stiffness of double layered of rebar in wall based on load-deflection curve obtained is in the range from 116.17% to 289.88% higher than single layered of rebar in wall. Based on the experimental results, specimens consisted of double layered of rebar in wall is found to provide higher bending capacity to the joint of wall-slab structural system in the range from 56.25% to 98.86% compared with single layered of rebar in wall.

The Role of an Actual Brand Positioning: An Analysis of Digital Advertisements

2021 ◽  
pp. 1-10
Author(s):  
June Won ◽  
J. Lucy Lee
Keyword(s):  
Regression Analysis ◽  
Content Analysis ◽  
Brand Positioning ◽  
Focus Group Interviews ◽  
Mediating Role ◽  
Percentage Difference ◽  
Performance Tradition ◽  
Group Interviews ◽  
The Relationship

The purpose of this study was to: (a) investigate the actual positions in digital communications; (b) assess the relationship between position-congruity among intended positions (i.e., how a firm desires to be perceived by consumers), actual brand positions, and perceived brand positions (i.e., the perceptions that customers have in their minds); and (c) understand the role of actual positioning (AP) in the positioning process. Multiple methods (one-on-one and focus group interviews, content analysis) were applied to analyze positions. Brand managers, golf consumers, and digital advertisements in Golf Digest magazine were sampled. Content analysis, frequencies and percentages, percentage difference, and regression analysis were performed for all positions for each research brand. The results revealed that: (a) tangibility-based positions (88.5%: great quality, innovation) outnumbered intangibility-based ones (11.5%: tour performance, tradition) in digital AP, (b) there was no positive correlation between the degree of congruence between intended and AP and the degree of congruence between intended and perceived positioning, and (c) the AP mediated between intended and perceived positioning in the brand positioning model. The study provides empirical evidence for the mediating role of AP and suggests modifications to the previous positioning process.

Modul Persamaan Lingkaran Berbasis Search, Solve, Create and Share (SSCS)

2020 ◽  
Vol 8 (4) ◽  
pp. 261-272
Author(s):  
Evi Candra Monica ◽  
Nurain Suryadinata ◽  
Nurul Farida
Keyword(s):  
Development Research ◽  
Questionnaire Response ◽  
Design Expert ◽  
Is Research ◽  
Total Percentage ◽  
Learning Mathematics ◽  
Stage 1 ◽  
D Model ◽  
Group Trial ◽  
Expert Validation

The purpose of the development of this mathematics module is to produce products in the form of mathematical modules based on Search, Solve, Create, and Share (SSCS) material that is valid and practical. The type of research that is used is research and development (R&D). The model that is used is the R&D model developed by Sugiyono who has been modified. The stages which are used in this development research only stage 1 through 7. The instruments which are used were expert validation questionnaire and questionnaire response of students. Based on the results of expert validation obtained the results of the validation of material expert 78,84% (decent categories), linguists expert 85% (category of very feasible) and design expert 83,6% (a very feasible category), so that the overall percentage of the validator obtained a total percentage of 82,48% (very feasible category). The results of the small group trial were obtained from the response of students of the mathematics module was 84% (a very practical category). Based on the results, it can be concluded that the SSCS-based mathematics module material for students’ questions in SMA Negeri 1 Metro is very feasible and very practical to be used as a source of learning mathematics, especially circle material.

Maximal Aerobic Power in Aging Men: Insights From a Record of 1-Hour Unaccompanied Cycling

2018 ◽  
Vol 13 (1) ◽  
pp. 112-114 ◽  
Author(s):  
Carlo Capelli
Keyword(s):  
Aerobic Power ◽  
Average Rate ◽  
Human Locomotion ◽  
Maximal Aerobic Power ◽  
Metabolic Power ◽  
Master Athletes ◽  
Active Lifestyle ◽  
Average Percentage ◽  
Aging Men ◽  
The Relationship

Purpose: To analyze best 1-h unaccompanied performances of master athletes in ages ranging from 35 to 105 y to estimate the decay of maximal aerobic power (MAP) across the spectrum of age. Methods: MAP at the various ages was estimated by computing the metabolic power () maintained to cover the distances during best 1-h unaccompanied performances established by master athletes of different classes of age and by assuming that they were able to maintain an equal to 88% of their MAP during 1 h of exhaustive exercise. Results: MAP started monotonically decreasing at 47 y of age. Thereafter, it showed an average rate of decrease of ∼14% for the decades up to 105 y of age, similar to other classes of master athletes. Conclusions: The results confirm, by extending the analysis to centennial subjects, that MAP seems to start declining from the middle of the 5th decade of age, with an average percentage decay that is faster than that traditionally reported, even when one maintains a very active lifestyle. The proposed approach may be applied to other types of human locomotion for which the relationship between speed and is known.

scholarly journals PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS MULTIMEDIA PADA MATA KULIAH KOMPETENSI PEMBELAJARAN POKOK MATERI KETERAMPILAN DASAR MENGAJAR

Jurnal PenSil ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 24-30
Author(s):  
Gilang Mawardi ◽  
Tuti Iriani ◽  
Daryati Daryati
Keyword(s):  
Research And Development ◽  
Design Process ◽  
Process Design ◽  
Research Method ◽  
Development Process ◽  
Development Research ◽  
The Media ◽  
D Model

This research is a type of research and development that aims to produce products in the form of multimedia powerpoint-based learning media in Learning Competency courses. This development research is a Research and Development research method with the 4D (four-D) model. This research is basically done through four main stages, namely define process, design process, develop process, and disseminate process. However, the research only reaches the stage of the development process. This study uses a questionnaire as a tool to test the feasibility of the media through the validation of media experts and material experts. The results of development are multimedia powerpoint-based learning media products. Assessments by material expert lecturers get scores 4,27 categorized as "Very Good". An assessment by a media expert lecturer got a score of 3.31 which was categorized as "Quite Good". The results of the average assessment from material and media experts get the value "3,79" means that multimedia-based learning media is categorized as "Good.".

scholarly journals Pengembangan Buku Ajar Berbasis Problem Based Learning di Sekolah Dasar

2021 ◽  
Vol 5 (2) ◽  
pp. 469-478
Author(s):  
Fitria Devirita ◽  
Neviyarni Neviyarni ◽  
Daharnis Daharnis
Keyword(s):  
Problem Based Learning ◽  
Development Stage ◽  
Design Stage ◽  
Development Research ◽  
Learning Tools ◽  
Teaching Materials ◽  
Living Things ◽  
Fourth Grade Students ◽  
D Model ◽  
Thematic Learning

The research objective was to develop thematic teaching materials based on Problem Based Learning in the two sub-theme of the diversity of living things in grade IV elementary schools. The development of teaching materials is motivated by the need for learning that can improve students' ability in problem solving, the ability to think critically, and foster curiosity. This type of research is development research (research and development). The development model used is the 4-D model which consists of the stages of defining, designing, developing and disseminating. The define stage will carry out an analysis of the curriculum, student analysis and needs analysis. The design stage is carried out by designing the lesson plans and teaching materials. The development stage is carried out by testing the validity, practicality and effectiveness test. The disseminate stage cannot be carried out because of the covid pandemic 19. The results of the research at the design stage obtained RPP and teaching materials designed by following PBL steps. The development stage based on the validity test of teaching materials is categorized as valid. At the effectiveness stage, the results showed that the teaching materials were effective so that they were easy to use by fourth grade students of SDN 03 Muaro. Based on these results, it can be concluded that the thematic learning tools based on Problem Based Learning on the sub-theme of the Diversity of Living Things for grade IV SD that have been produced can be declared valid, practical and effective.

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