PENGEMBANGAN BAHAN AJAR E-LKPD BERBASIS PENGERINGAN IKAN ASIN PADA MATERI SUHU DAN KALOR FISIKA SMA

The research carried out aims to develop teaching materials that are sontextual local wisdom in order to attract student in learning. The teaching materials that will be developed in this research are e-LKPD based on drying salted fish on temperatured and heat materials. The research method used in this research in the ADDIE development model. The ADDIE development model has five stages, namely Analysis, Design, Development, Implementation and evaluation. The research steps are carried out in accordanse with the ADDIE satges. The results of the research conducted, namely at the analysis stage, it was found that the lack of use of alternative teaching materials such as e-LKPD made student less interested during the learning process. Teaching materials that contain observation activities are meeded to improve psychomotor skills in students so that in this study the e-LKPD was developed by containing a simple experiment on drying salted fish. Preparation or writing of e-LKPD materials using the 3d pageflip application. This applicatin has the adavantage of complete features that make the 3d effect look real. This 3d pageflip appication requires a number of computer devices to use and the installation process is quite long. The constraints of this research are that the computer equipment owned by the researcher does not support the isntallation of the 3d pagefip application, the limited time of the study, and the limitation of the researcher in usng the 3d pageflip applicatin so that the research is only carried out until the sdesign stage.

External factors that affect the photoplethysmography waveforms

Photoplethysmography (PPG) is a simple and inexpensive technology used in many smart devices to monitor cardiovascular health. The PPG sensors use LED lights to penetrate into the bloodstream to detect the different blood volume changes in the tissue through skin contact by sensing the amount of light that hits the sensor. Typically, the data are displayed on a graph and it forms the pulse waveform. The information from the produced pulse waveform can be useful in calculating measurements that help monitor cardiovascular health, such as blood pressure. With many more people beginning to monitor their health status on their smart devices, it is extremely important that the PPG signal is accurate. Designing a simple experiment with standard laboratory equipment and commercial sensors, we wanted to find how external factors influence the results. In this study, it was found that external factors, touch force and temperature, can have a large impact on the resulting waveform, so the effects of those factors need to be considered in order for the information to become more reliable.

PENDAMPINGAN PRAKTIKUM IPA KELOMPOK SISWA BELAJAR LURING BERBASIS SIMPLE EXPERIMENT TOOLS

ABSTRAK Pengabdian ini dilaksanakan untuk menyelesaikan masalah yang dihadapi oleh Kelompok siswa yang belajar secara Luring bukan di area sekolah melainkan di Desa-desa asal siswa. Siswa merupakan objek dalam PKM ini karena merupakan mitra yang membutuhkan penanganan khusus. Adapun permasalahan yang kami temukan setelah melakukan interview dan wawancara yakni (1) Siswa merasa kesulitan melaksanakan praktikum karena alat-alat berada di laboratorium sekolah, (2) Siswa merasa kesulitan dalam meresapi atau memahami materi-materi IPA tanpa dilakukan praktikum (3) Belum mengetahui informasi tentang praktikum berbasis Simple Experiment Tools. Tim Pengabdian menawarkan solusi berupa (1) Memberikan pendampingan kepada kelompok siswa cara melakukan praktikum berbasis Simple Experiment Tools. (2) Memberi praktik dengan modul praktikum berbasis Simple Experiment Tools. Metode yang dilakukan yaitu 1) Pra Lapangan; 2) Pelaksanaan PKM; 3) Evaluasi Pasca Pendampingan. Masing-masing item terdiri dari beberapa tahapan. Setelah melakukan pendampingan, siswa dapat melakukan praktikum berbasis Simple Experiment Tools. Dari hasil evaluasi yang dilakukan diperoleh 89% siswa dapat melakukan praktikum. 100%siswa sangat suka dengan praktikum IPA yang dilakukan. Kata kunci: praktikum IPA; belajar luring; simple experiment tools. ABSTRACTThis service is carried out to solve the problems faced by students who study offline, not in the school area but in the villages where the students come from. Students are objects in this PKM because they are partners who need special handling. As for the problems that we found after conducting interviews and interviews, namely (1) Students find it challenging to carry out practicum because the tools are in the school laboratory, (2) Students find it difficult to absorb or understand science materials without doing practicum (3) Do not know information about the Simple Experiment Tools-based practicum. The Devotion Team offers solutions in the form of (1) Assisting groups of students on how to do practicals based on Simple Experiment Tools. (2) Provide practice with a practicum module based on Simple Experiment Tools. The methods used are 1) Pre-Field; 2) Implementation of PKM; 3) Evaluation of Post Mentoring. Each item consists of several stages. After assisting, students can do practical work based on Simple Experiment Tools. From the evaluation results carried out, it was found that 89% of students were able to do the practicum. 100% of students like the science practicum carried out. Keywords: science practicum; offline learning; simple experiment tools.

Interaction Between a Robot and Bunimovich Stadium Billiards

The robot–environment–task triad provides many opportunities to revisit physical problems with fresh eyes. Hence, we develop a simple experiment to observe chaos in classical billiards with a macroscopic 3.38-meter long setup. Using a digital video camera, one records the dynamic time evolution of the interaction between a robot and Bunimovich stadium billiards with specular reflection. From the experimental time series, we calculate the Lyapunov exponent λ as a function of a geometric parameter. The results are in concordance with theoretical predictions. In addition, we determine the Poincaré surface of section from the experimental data and check its sensitivity to the initial conditions as a function of time.

Quantum mechanical four-dimensional non-polarizing beamsplitter

Some quantum optics researchers might not realize that classical electromagnetism predicts a $$\mathbf {\pi }$$ π phase shift between S- and P-polarized reflection and might think the reflection coefficients of the transverse modes are independent, or that such a phase shift has no measurable consequences. In this paper, we discuss theoretical grounds to define elements of a 4x4 matrix to represent the beamsplitter, accurately accounting for transverse polarization modes and phase relations between them. We also provide experimental evidence confirming this matrix representation. From a scientific point of view, the paper addresses a non-trivial equivalence between the classical fields Fresnel formalism and the canonical commutation relations of the quantized photonic fields. That the formalism can be readily verified with a simple experiment provides further benefit. The beamsplitter expression derived can be applied in the field of quantum computing.

Kesesuaian Teori Perkembangan Kognitif Piaget Pada Peserta Didik Kelas I Dan II Dalam Memahami Hukum Kekekalan

This study aims to determine the suitability of cognitive development of class I and II students in understanding the law of conservation of numbers, conservation of material and long conservation with Jean Piaget's theory of cognitive development. This type of research is quantitative with a qualitative-descriptive approach. This study population was 52 students in grades I and II at Madrasah Ibtidaiyah Al-Mukhtariyah Foundation Al-Islamiyah Mamben Daya Academic Year 2020/2021 with a sampling technique using a purposive sampling technique. Based on this technique, 14 research samples were obtained, six samples from class I and eight samples from class II. The instrument used was a test in the form of a brief description of the law of conservation of numbers, conservation of matter and conservation of length. The non-test instrument is an interview combined with a simple experiment. Interviews and simple experiments in this study use coins to the conservation of numbers, water and glass for the conservation of matter, and finally the rope for the conservation of length. Based on the results of the data analysis on the answers to the students' test questions, it is known that 50% of students already understand the law of conservation of numbers, the law of conservation of matter and the law of long conservation. Meanwhile, based on the results of interviews and simple experiments, it is known that 7 students have understood the law of conservation of numbers, conservation of matter and conservation of long, 2 students have understood the law of conservation of numbers and conservation of matter, 2 students have understood the law of conservation of numbers and conservation of length, 2 participants students understand the law of the conservation of numbers and 1 student who does not understand the three conservation laws. For further researchers, they can research the causes of students who have entered the concrete thinking stage and do not understand the law of eternity.

Do It Yourself: Air Drag Force Experiment Using Paper and Scraper Sheet

Free fall motion in air medium is only influenced by gravitation acceleration. However, there are several variables that caused the observations to be different with the concept. Variables, such as air drag and terminal velocity, are often teachers not presented in detail, causing misconceptions. This study aims to develop a simple experiment on free fall motion by identifying air drag and terminal velocity. The data in this study is the video of free fall motion of paper and scraper analyzed using Tracker video analyze. From the video analyzed, information is obtained in the form of time (t), track (l, θ), and velocity (v) of the object. This study shows that the air drag force increase unto the terminal velocity. The calculation of the drag coefficient giving the number of the paper 2,16 and the scraper 2,10. According to data analyzed, the air drag force is affected by the mass (m), area (A), and the air drag force (F_D) with the linear correlation until it reaches the terminal velocity. The result of this study may use as references of free fall motion experiment with other objects and analyze.

Keeping Fruits And Vegetables Fresh By Limiting Respiration And Transpiration

In this article, we will explain the processes of transpiration and respiration in plants. Also, we will explain how to keep fruits and vegetables fresh for longer periods by limiting respiration and transpiration. You will furthermore learn how to measure these processes and to visualize the process of transpiration in a very colorful manner at home through a very simple experiment. In addition, by the end of this article, we will help you answer many “whys” related to respiration and transpiration in plants, specifically in fruits and vegetables.

Quantum Mechanical 4-dimensional Non-polarizing Beamsplitter

The effects of a beamsplitter are frequently described mathematically as a matrix acting on a two input ports vector. This might be comprehensive for a scalar field but certainly insufficient in case of photons which are vector fields. In this paper we discuss theoretical grounds to define elements of a 4x4 matrix to more accurately represent the beamsplitter, fully accounting for transverse polarization modes. We also provide experimental evidence confirming this matrix representation. From scientific point of view the paper addresses a non-trivial equivalence between the classical fields Fresnel formalism and the canonical commutation relations of the quantized photonic fields. That the formalism can be readily verified with a simple experiment provides further benefit. The beamsplitter expression derived can be applied in the field of quantum computing.

Absolute Displacement-Based Formulation for Peak Inter-Story Drift Identification of Shear Structures Using Only One Accelerometer

Only one accelerometer is used in this paper for estimating the maximum inter-story drifts and time histories of the relative displacements of all stories of multi-degree-of-freedom (MDOF) shear structures under seismic excitation. The calculation based on the data of one sensor using a conventional method is unstable, and when modal coordinates are used, higher modes should be included, which is different from the estimation based on the responses recorded by many accelerometers. However, the parameters of the higher modes of structures are difficult to obtain from structures under small excitations. To overcome this difficulty, the recorded absolute acceleration is converted into the absolute displacement, and a state-space equation is formulated. Numerical simulations of a nine-story structure were conducted to check the applicability, robustness against environmental noise, and optimal installation location of the accelerometer of the proposed approach. In addition, the effects of the higher modes were analyzed in terms of the number of accelerometers and type of response. Finally, the proposed approach was validated in a simple experiment. The results indicate that it can accurately estimate the time histories of the relative displacements and maximum inter-story drifts of all floors when one accelerometer is used and just the first two modal parameters are incorporated in the model. Furthermore, the approach is robust against environmental noise.