Abstract:Abstract: In this paper we discuss the development of computational application program in MATLAB to calculate the second derivative of a function by using finite difference method for various types (forward, backward, or…
r central) and any order of accuracy. The MATLAB program extends the similar one which has been developed for the first derivative. The program is designed as an implementation of the explicit formulas of finite difference formulated by Khan and Ohba. Through this program, one can easily calculate the second derivative of a function numerically with any order of accuracy and visualize it in a graphical form. Error of numerical derivatives in each order of accuracy confirm the validity of the obtained results.
Keywords: finite difference method, explicit formula, second derivative, MATLAB programming
Abstrak: Dalam makalah ini dibahas pengembangan program aplikasi komputasi pada MATLAB untuk menghitung turunan kedua suatu fungsi dengan menggunakan metode beda hingga pada berbagai tipe (maju, mundur, atau pusat) dan sebarang orde ketelitian. Program MATLAB ini melanjutkan program serupa yang telah dibuat untuk turunan pertama. Program ini dirancang sebagai implementasi dari rumus eksplisit beda hingga yang diformulasi oleh Khan dan Ohba. Melalui program ini, seseorang dengan mudah dapat menghitung turunan kedua suatu fungsi secara numerik dengan sebarang orde ketelitian dan memvisualisasinya dalam bentuk grafik. Galat dari turunan numerik di setiap orde ketelitian mengkonfirmasi kevalidan hasil yang diperoleh.
Kata kunci: metode beda hingga, rumus eksplisit, turunan kedua, pemrograman MATLAB
Abstract:Abstract: Most farmers are do’nt know what plants are suitable for planting on their land. This is due to the lack of knowledge of farmers regarding the suitability of land with the growing requirements of a crop. The…
The lack of knowledge of farmers and the community about the evaluation of land suitability causes the cultivated plants do not produce optimally, because the conditions required by these plants are not in accordance with the conditions of the land that supports the growth of these plants. Seeing the importance of the process of selecting plants based on land suitability, while determining the selection of plants is still done only by looking at the experience of farmers who have not been tested. So the authors feel the need to make research to determine plants on land based on land suitability and plant growth requirements. The Analytical Hierarchy Process method is very suitable to be used to calculate the priority weight of each criterion because it is objective, which will later be used as a reference ranking by the TOPSIS method. With this research, it can determine the estate crops that will be planted on a land based on the level of land suitability and the requirements for growing plants that are alternative precisely, accurately and dynamically.
Keywords: DSS, AHP, TOPSIS
Abstrak: Kebanyakan Petani masih banyak yang belum mengetahui tanaman apa yang cocok ditanaman di lahannya. Hal ini disebabkan karena kurangnya pengetahuan petani mengenai kesesuaian lahan dengan persyaratan tumbuh suatu tanaman. Lemahnya tingkat pengetahuan petani dan masyarakat tentang evaluasi kesesuaian lahan menyebabkan tanaman yang dibudidayakan tidak berproduksi optimal, karena syarat yang dibutuhkan tanaman tersebut belum sesuai dengan kondisi lahan yang mendukung pertumbuhan tanaman tersebut. Melihat pentingnya proses pemilihan tanaman berdasarkan kesesuain lahan, sedangkan penentuan pemilihan tanaman masih dilakukan hanya berdasarkan dengan melihat pengalaman petani yang belum teruji. Maka penulis merasa perlu membuat penelitian untuk menentukan tanaman pada lahan berdasarkan kesesuain lahan dan persyaratan tumbuh tanaman. Metode Analytical Hierarchy Process sangat cocok digunakan untuk menghitung bobot prioritas dari tiap kriteria karena bersifat obyektif, yang nantinya menjadi acuan perangkingan yang dilakukan dengan metode TOPSIS. Dengan adanya penelitian ini, maka dapat menentukan tanaman perkebunan yang akan ditanam pada suatu lahan berdasarkan tingkat kesesuaian lahan dan persyaratan tumbuh tanaman yang menjadi alternatif secara tepat, akurat dan dinamis.
Kata kunci: SPK, AHP, TOPSIS
Abstract:Abstrack: Wireless usage is no longer only able to send data or files, power delivery or power transfer can be applied using wireless networking technology system or also called wireless energy transfer. Research purposes,…
s, to make prototype power wireless transfer by using royer oscilator circuit, and turning the load to the maximum with the minimum possible input. Using the 9.8 V input from Trafo 5A and changing the capacitor value of 6.8nf / 100v x10 C on the transmitter (coil transmitter bigger than coil receiver). Installation of each capacitor with a distance of 7 cm, give effect to maximal value increase, with Voltage 14.2 V, current 0.02 A, power 0.284 W and Decrease Freq 610.5 KHz. As for the distance of 12 cm also get a maximum value of 11.8 V voltage, current 0.02 A, and a decrease in Frequency 614 Khz. The greatest efficiency at both distances is obtained, and . To turn the load to the maximum (7 lamps used 7 W lamps with a total load 28 W), PWT connected to USB 5V, and connected to battery and booster converter circuit so the distance is 12 cm, obtained input voltage 2.2 and output voltage 47.8 V, with output power of 1.43 W, current 0.03 A, and percentage increase of 2072 voltage. Installation of capacitors affects the voltage values, current, distance and power on the receiver. To light a large load, used a series of booster converter to power 28 W load, with 3.7 V input on battery packed on USB 5V, type TP-4056.
Keyword : Royer Oscillator circuit, Power wireless transfer, Booster converter circuit
Abstrak: Penggunaan Wireless saat ini tidak lagi hanya bisa mengirim data atau file, pengiriman daya atau perpindahan daya bisa diterapkan menggunakan sistem teknologi jaringan nirkabel atau disebut juga wireless energy transfer. Tujuan penelitian, untuk membuat prototype power wireless transfer dengan menggunakan rangkaian royer oscilator, dan menyalakan beban secara maksimal dengan input seminimal mungkin. Dengan menggunakan input 9.8 V dari Trafo 5A dan perubahaan nilai kapasitor 6,8nf / 100v x10 C pada bagian transmitter (coil transmitter lebih besar dari coil receiver). Pemasangan tiap-tiap kapasitor dengan jarak 7 cm, memberi dampak peningkatan nilai maksimal, dengan Tegangan 14.2 V, arus 0.02 A, daya 0.284 W dan Penurunan Freq 610.5 KHz. Sedangkan untuk jarak 12 cm juga mendapatkan nilai maksimal tegangan 11.8 V, arus 0.02 A, dan penurunan Frequensi 614 Khz. Efisiensi terbesar pada kedua jarak tersebut didapat, dan . Untuk menyalakan beban secara maksimal (beban digunakan lampu 7 W sebanyak 4 lampu dengan total beban 28 W), PWT dihubungkan ke USB 5V, dan terhubung ke baterai dan rangkaian booster converter, sehingga jarak 12 cm, didapat input tegangan 2.2 dan keluaran tegangan 47.8 V, dengan daya keluaran 1.43 W, arus 0.03 A, dan Persentasi kenaikan tegangan 2072. Pemasangan kapasitor mempengaruhi nilai tegangan, arus,jarak dan daya pada receiver. Untuk menyalakan beban yang besar, digunakan rangkaian booster converter untuk menyalakan beban 28 W, dengan input 3.7 V pada baterai yang dicas pada USB 5V, jenis TP-4056.
Kata Kunci : Rangkaian Royyer Oscillator, Power wireless transfer , Rangkain Booster
Abstract:Abstrack: Diffable or the word that has defenition is “ Different Abled People†the term for disabled people. One example of disabled is people who do not have hands, so to write even have to use their feet. Along with…
. Along with the increasingprogress of computer technology, the role of computer technology has also increased for the benefit of humans. One of them is the field of human and computer interaction ( IMK) or also called Human Computer Interaction ( HCI) . Although computer technology equipment is accurate and reliable, but the interaction model that is carried out is not natural as humans interact with each other, the use of such equipment to operate it requires direct contact between user and the computer. For people who dissabilities who do not have hands, it will be difficult to do so. Computer vision based interaction techniques are candidates for natural interaction techniques. The human head can also be used to replace the function of a mouse that can be used to move the cursor up and down left or right for and to click on the mouse using the blik an eye. Detection using head movements has been widely applied including in the fields of entertainment, education, and security. The camera is a tool used to make head recognition. The camera is used as a sensor to detect head movements. Head motion detection is implemented by using opency phython.
Keyword: difabel, head, webcame, opencv python
Abstrak: Difabel atau kata yang memiliki definisi “Different Abled People†ini adalah sebutan bagi orang cacat. Salah satu contoh kaum difabel adalah orang yang tidak mempunyai tangan, sehingga untuk menulispun harus menggunakan kaki. Seiring meningkatnya kemajuan teknologi komputer, peranan teknologi komputer juga semakin meningkat yang digunakan untuk kepentingan manusia. salah satunya adalah bidang interaksi manusia dan komputer (IMK), atau sering disebut Human Computer Interaction (HCI). Keyboard, mouse, dan joystick merupakan salah satu perangkat keras yang sering digunakan untuk interaksi antara manusia dan komputer yang bersifat mekanis. Meskipun peralatan-peralatan tersebut akurat dan handal (reliable), tetapi model interaksi yang dilakukan tidak bersifat alami sebagaimana manusia berinteraksi dengan sesamanya, penggunaan peralatan-peralatan tersebut untuk mengoperasikannya membutuhkan adanya kontak langsung antara user dengan komputer. Untuk kaum difabel yang tidak mempunyai tangan, akan susah melakukan hal tersebut. Teknik interaksi berbasis visi komputer menjadi kandidat teknik interaksi yang bersifat alami. kepala manusia bisa juga digunakan untuk menggantikan fungsi mouse yang bisa digunakan untuk menggerakan cursor keatas kebawah kekiri maupun kekanan dan untuk melakukan klik pada mouse menggunakan kedipan mata. Pendeteksian menggunakan gerakan kepala telah diaplikasikan secara luas diantaranya pada bidang hiburan, pendidikan serta keamanan. Kamera (webcam) merupakan alat yang digunakan untuk melakukan pengenalan kepala. Kamera ini digunakan sebagai sensor untuk mendeteksi pergerakan kepala. Pendeteksian gerakan kepala diimplementasikan dengan menggunakan opencv python.
Abstract:Abstract: An interface design for learning application is designed based on the user need. User Centered Design (UCD) purposed for help the design process match with the user need which is user usability oriented. After…
arranging based on that need, so the application is modelled using Unified Modelling Language (UML) to describe the systematic and how the application works from the designed application. The use of UCD can be used in designing an application for cultural diversity learning in Asahan with the Web-based. The element in the information system explained graphically and expose the close relationship of each element. So by the detail design dan user need oriented, the youth attracted and willing to learn their culture by the comprehensive information system.
Keywords: User Centered Design, Unified Modelling Language, culture diversity of Asahan
Abstrak: Sebuah perancangan antarmuka aplikasi pembelajaran disusun dan dibuat berdasarkan kebutuhan penggunanya. User Centered Design (UCD) bertujuan untuk membantu perancangan sesuai dengan kebutuhan yang berorientasi pada usability pengguna. Setelah disusun sesuai kebutuhan tersebut, maka aplikasi dimodelkan dengan menggunakan Unified Modelling Language (UML) sehingga terlihat jelas seperti apa sistematika dan operasi penggunaan dari aplikasi yang dirancang. Penggunaan UCD dapat digunakan dalam merancang suatu aplikasi pembelajaran keragaman budaya di Asahan berbasis Web. Elemen yang ada pada aplikasi ini digambarkan secara grafis dan dapat memperlihatkan hubungan yang erat antar elemennya. Sehingga melalui perancangan yang detail dan berorientasi pada kebutuhan pengguna, generasi muda tertarik dan mau mempelajari kebudayaannya sendiri melalui sistem informasi yang komprehensif.
Kata kunci: User Centered Design, Unified Modelling Language, keberagaman budaya Asahan.
Abstract:Penelitian ini bertujuan untuk menganalisis konten latihan dan soal yang merepresentasikan kemampuan berpikir tingkat tinggi (HOTS) pada buku teks Matematika kelas VII SMP terbitan Kementerian Pendidikan, Kebudayaan, Riset,…
et, dan Teknologi sebagai bahan ajar Kurikulum Merdeka. Anifarka & Rosnawati (2023) menyatakan bahwa buku teks yang berkualitas seyogianya mampu memfasilitasi perkembangan kognitif peserta didik selaras dengan capaian pembelajaran yang ditetapkan. Metode yang diterapkan dalam kajian ini adalah analisis isi dengan pendekatan deskriptif kualitatif. Instrumen analisis merujuk pada dimensi kognitif C4 (Menganalisis), C5 (Mengevaluasi), dan C6 (Menciptakan) berdasarkan revisi taksonomi Bloom oleh Anderson & Krathwohl (2001). Temuan penelitian mengindikasikan bahwa dari total 485 butir soal dan aktivitas yang tersebar pada enam bab, sebanyak 147 butir (30,31%) tergolong dalam kategori HOTS. Distribusi HOTS tertinggi ditemukan pada Bab 5 tentang Persamaan dan Pertidaksamaan Linear Satu Variabel (38,46%), sedangkan terendah pada Bab 1 tentang Bilangan (22,80%). Level kognitif yang paling dominan adalah C4-Menganalisis (58,50%), diikuti C5-Mengevaluasi (28,57%), dan C6-Mencipta (12,93%). Temuan ini mengindikasikan bahwa buku teks Kurikulum Merdeka telah mengintegrasikan HOTS secara lebih sistematis dibandingkan kurikulum sebelumnya (Fanani, 2018)meskipun proporsinya perlu ditingkatkan untuk memenuhi tuntutan pembelajaran abad ke-21.
This study aims to analyze the content of exercises and questions representing higher-order thinking skills (HOTS) in the Mathematics textbook for grade VII junior high school published by the Ministry of Education, Culture, Research, and Technology as teaching materials for the Independent Curriculum. Anifarka & Rosnawati (2023) stated that a quality textbook should be able to facilitate students' cognitive development in line with the established learning outcomes. The method applied in this study is content analysis with a qualitative descriptive approach. The analysis instrument refers to the cognitive dimensions C4 (Analyzing), C5 (Evaluating), and C6 (Creating) based on the revised Bloom's taxonomy by Anderson & Krathwohl (2001). The research findings indicate that of a total of 485 questions and activities spread across six chapters, 147 items (30.31%) are classified as HOTS. The highest HOTS distribution was found in Chapter 5 on Linear Equations and Inequalities with One Variable (38.46%), while the lowest was in Chapter 1 on Numbers (22.80%). The most dominant cognitive level is C4-Analyzing (58.50%), followed by C5-Evaluating (28.57%), and C6-Creating (12.93%). This finding indicates that the Independent Curriculum textbooks have integrated HOTS more systematically than the previous curriculum (Fanani, 2018), although the proportion needs to be increased to meet the demands of 21st-century learning.
Abstract:This research was undertaken to analyze the influence of the Wordwall application on the speaking skills of eleventh-grade students at SMAN 1 Ciruas. Consequently, Wordwalluantitative methodology and a quasi-experimental…
design involving 82 participants, organized into two equally sized groups, namely the experimental and control groups. Data collection was conducted through speaking assessments administered prior to and following the treatment. The findings showed that students who received the treatment achieved better improvement in speaking skills than those in the control group. The average score achieved by the experimental group increased from 63.90 to 83.12, whereas the control group’s mean score rose from 66.15 to 74.34. The hypothesis test results revealed a significance value below 0.05 (p < 0.001), providing evidence of a statistically significant difference between the groups. The results point to the fact that the Wordwall application was effective in enhancing students’ speaking skills.. Consequently, Wordwall can be considered an effective technology-based learning tool for promoting speaking skill development in English language learning.
Abstract:This study examines the Islamic legal status of Valentine's Day celebrations through a hadith based approach and explores how Indonesian Muslims understand the phenomenon. The study addresses the tension between the prohibition…
ibition of tasyabbuh in the hadith “Man tasyabbaha bi qaumin fahuwa minhum” and the growing practice of Valentine's Day celebrations among young Muslims. Using a sequential mixed-methods design, the study combines desk research including analysis of the sanad, matn, and fiqh of hadith from six journal articles and one primary hadith source with an online survey of 47 Indonesian Muslims aged 16–28 selected through purposive and snowball sampling. The textual analysis found that the hadith is hasan (Islamic law) and that the prohibition of tasyabbuh specifically relates to the imitation of religious symbols and rituals, not all forms of cultural practices. The survey findings support this conclusion: most respondents understand the hadith (80.9%), have never actively celebrated Valentine's Day (89.3%), and believe the prohibition applies primarily to religious or symbolic imitation (55.3%). This study concludes that the primary concern among contemporary Indonesian Muslims is not the religious origins of Valentine's Day, but rather the associated practices, particularly khalwat, which risk violating sharia principles.
Abstract:This study examines how employees perceive and trust Algorithmic Performance Appraisal (APA) in digital-native and technology-driven companies. Adopting Organizational Justice Theory, the Trust in Technology Framework, and…
nd Cognitive Appraisal Theory, the research explores both the direct and indirect effects of APA on employee trust, with Perceived Procedural Fairness (PPF) as a mediating variable. The study uses a quantitative, cross-sectional approach, collecting data from 200 employees in technology-based organizations and analyzing the data with Partial Least Squares Structural Equation Modeling (PLS-SEM). Results show that APA significantly enhances both procedural fairness and employee trust, with PPF playing a partial mediating role in this relationship. These findings underscore the importance of transparency, procedural legitimacy, and avenues for employee voice in cultivating trust in algorithmic systems. The study’s theoretical contribution lies in its integration of multiple perspectives on trust and fairness within algorithmic HR management. The practical implication calls for the careful design and implementation of APA systems that employees perceive as fair and trustworthy. Future research should investigate these relationships in longitudinal and multi-contextual settings to deepen the understanding of trust dynamics in evolving AI-mediated work environments.
Abstract:This study critically examines the constitutionality of Indonesia’s presidential candidacy threshold under Article 222 of Law No. 7 of 2017 in relation to the principle of popular sovereignty in Article 1(2) of the 1945…
5 Constitution. The threshold requiring a party or coalition to hold 20% of DPR seats or 25% of the popular vote has been controversial for limiting voter choice and reinforcing oligarchic dominance. Using a normative legal research method, the study applies doctrinal interpretation through grammatical, systematic, historical, and teleological approaches to evaluate whether the threshold is consistent with constitutional democracy. The analysis identifies a disconnect between the legislative rule and the constitutional concept of sovereignty residing with the people, informed by theories of democracy, sovereignty, and progressive legal thought. While procedurally legitimate, the threshold lacks substantive constitutional validity because of its exclusionary impact on political participation. The study proposes four reform options: repeal, proportional adjustment, judicial reinterpretation, and constitutional amendment. These reforms would realign electoral rules with democratic principles and restore voters’ political agency. A doctrinal reinterpretation model is offered, framing the threshold as a regulatory instrument rather than a rigid barrier, advocating a legal structure that promotes inclusivity and reflects the people’s general will.