The development of information and communication technology also provides convenience and practicality in the world of education. In this paper, an alternative solution is presented for the discussion of energy band material in Body Centered Cubic (BCC) based on tight binding in distance material physics lectures. These activities take advantage of technology assistance in the form of spreadsheet software. Spreadsheet software is used in this research because it is a computational software that can visualize a graphic according to user commands. The use of spreadsheets is also due to being one of the computational programs that are easy to access, operate, and often used by students, especially during the current conditions affected by the Covid-19 pandemic. This research presents a simple way for students to visualize the energy band from BCC through the spreadsheet assistance. This visualization of the energy bands in BCC begins by describing the appropriate mathematical equation. Next, visualize the mathematical equation in graphical form with the spreadsheet assistance. This visualization activity can also be applied to students in material physics courses to help students understand the various characteristics of solids that have the form of BCC in everyday life. Distance material physics lectures that implement the visualization process can increase student creativity to visualize various forms of energy bands of each solid substance present. HIGHLIGHTS In this study, we present an alternative solution to the discussion of energy band material in Body Centered Cubic (BCC) based on dense bonds in distance physics course material Visualization of Body Centered Cubic Energy Bands is done using spreadsheets This study presents a simple way to visualize the energy bands of BCC through the help of a spreadsheet Visualization of energy bands in this BCC begins by describing the appropriate mathematical equations. Next, visualize the mathematical equation in the form of a graph with the assistance of a spreadsheet This visualization activity can be applied to students in material physics courses to help students understand the various characteristics of solid objects in the form of BBC GRAPHICAL ABSTRACT

Gempabumi Yogyakarta dengan magnitude 6,3 Skala Richter yang terjadi pada tahun 2006 menyebabkan kerusakan bangunan di Kota Yogyakarta dan sekitarnya. Kerusakan banyak terjadi di daerah sedimen Yogyakarta daripada di perbukitan Wonosari yang memiliki lapisan lebih keras. Kerusakan ini mengindikasikan adanya kontrol efek tapak lokal. Penelitian ini bertujuan untuk memetakan daerah rawan kerusakan gempabumi di Kotamadya Yogyakarta berdasarkan analisis kurva Horizontal-to-Vertical Spectral Ratio (HVSR) dan mengetahui litologi bawah permukaan berdasarkan ground profiles kecepatan gelombang geser (Vs) dengan metode inversi kurva HVSR. Penelitian dilakukan di Kotamadya Yogyakarta dan sekitarnya yang dibatasi pada koordinat 7o45’58.09’’- 7o50’59.01’’ Lintang Selatan dan 110o19’7.87’’-110o24’35.43’’ Bujur Timur. Data mikrotremor sebanyak 280 diolah menggunakan metode HVSR. Proses inversi HVSR juga dilakukan untuk memperkirakan model perlapisan tanah. Hasil dari penelitian menunjukkan bahwa nilai frekuensi dominan (fo) di Kotamadya Yogyakarta dan sekitarnya berkisar antara 1,1-5,8 Hz, nilai amplifikasi (A0) berkisar antara 1-21, nilai Vs30 berkisar antara 210-376 m/s. Hasil inversi menunjukkan bahwa ketebalan lapisan sedimen di Kotamadya Yogyakarta dan sekitarnya berkisar antara 104 meter hingga 262 meter. Persebaran daerah lebih rentan secara seismik terdapat pada nilai amplifikasi tinggi sebesar 9-21 dengan rentang frekuensi 1,1-2,3 Hz yaitu di Kecamatan Sewon, Banguntapan dan Umbulharjo. Sebaran lokasi kejadian likuifaksi bersesuaian dengan nilai kecepatan gelombang geser rendah dengan rentang 210-262 m/s dengan jenis tanah sedang (SD) yaitu di Kecamatan Sewon, Banguntapan dan Umbulharjo.

Pemerintah China dan dunia selama masa pandemi COVID-19 memutuskan menutup sekolah secara nasional dan mengharuskan siswa untuk belajar online dari rumah. Artikel ini memiliki tujuan untuk menunjukkan problematika pembelajaran di era pandemi dan rekomendasinya. Studi literatur digunakan untuk mendeskripsikan berbagai problematika pembelajaran di era pandemi. Metode penelitian yang digunakan pada penelitian ini adalah kualitatif dengan pendekatan studi kepustakaan (library research) dengan cara mengumpulkan data dari berbagai sumber literatur. Proses pengumpulan data artikel melalui open access website Google Scholar dan Scopus dengan tahun terbit 2020 hingga 2022. Proses pencarian literatur dimulai frasa kunci utama “pandemi Covid 19”, “pendidikan” dan “sekolah”. Studi literatur menggunakan 29 artikel untuk mendeskripsikan berbagai problematika pembelajaran di era pandemi. Pencarian literatur selama pandemi di berbagai negara dilakukan sebagai pendukung paper. Problematika psikologis merupakan yang terbanyak sekitar 80% dan sisanya kesehatan fisik Saat sekolah sudah kembali dibuka, pemulihan harus dilakukan dengan cepat dan tepat dengan alokasi dana tepat guna. Disimpulkan bahwa sekolah harus membudayakan cuci tangan yang ketat sebelum dan setelah makan menggunakan sabun dan air. Perlu merancang kursus konseling kelompok untuk psikologi siswa terhadap trauma serta untuk meningkatkan ketahanan siswa selama masa pandemi. Model pembelajaran daring dapat digabungkan dengan pembelajaran luring sehingga akan mengatasi kekurangan masing-masing model pembelajaran pada saat sekolah sudah kembali dibuka.

The title of this paper is Fraunhofer diffraction simulation using spreadsheet and GNU octave media as an alternative for learning during the pandemic. This paper aims to present an alternative to distance learning during the COVID-19 pandemic by using simulations using spreadsheets and GNU Octave media. Optical practicum in physics laboratories can not be done during pandemics. So the solution that can be offered is to use simulations on optical subjects of diffraction material. In the simulation making activities students can learn and explore about the phenomenon of diffraction. Simulations using the equations used in the research of Zhang et al. in 2013. This simulation is used to visualize the effect of variations in different parameters such as wavelengths and gap widths in Fraunhofer diffraction patterns. This paper has successfully simulated Fraunhofer's diffraction using spreadsheets as well as GNU Octave. This distance learning allows students to develop fraunhofer computational computational skills and conceptual understanding of diffraction

The philosophy of existentialism emerged driven by the uncertain world conditions due to world wars. So existentialism is present as a thought movement that emphasizes human subjectivity and freedom. This study has a purpose for reflection. Reflection means the process of understanding events in the mind or experience that is owned. This study uses descriptive qualitative research. This study utilizes a literature search. The literature search process begins with key phrases such as “existentialism”, “education” and “awareness”. Man must exist, which means realizing that he exists to control himself and act on his behalf. The philosophy of existentialism talks about human existence, while talking about humans means questioning educational issues. Each person is unique, which is different from one another. Realizing this is important for students, parents, teachers, principals, board members, and all those involved in education. Education is expected to realize the "intensity of awareness" of students. So that they are aware of their responsibility to determine the life they will live themselves.