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This article presents a study on optimizing Tungsten Inert Gas (TIG) welding on mild steel (SPCC-SD/JIS G3141) with varying thicknesses of 0.6 mm and 0.8 mm. Automobile bodies commonly utilize mild steel with a material thickness ranging from 0.6 to 0.98 mm. The objective of this study was to ascertain the upper limit of tensile-shear strength that can be achieved by utilizing the specific parameters utilized in TIG welding. This study utilizes a three-level experiment and incorporates three input variables in the Taguchi experimental optimization method. The advantage of this approach lies in its ability to yield comprehensive outcomes while minimizing expenses, as it can be adapted to the resources available. An additional benefit is that this approach can be implemented in a multitude of industrial situations.The study's input variables are welding current, argon gas flow rate, and electrode diameter. Utilizing a continuous flow of argon gas of 12 LPM (liter per minute), a welding current of 55 A, and an electrode diameter of 1.6 mm, the maximum mean T-S strength of 3457.13 N was achieved. The ANOVA revealed that the flow rate, welding current, and electrode diameter had a per cent contribution of 50.07%, 26.89%, and 23.04%. The flow rate was the parameter with the most significant impact on the influential variable. The welding current and the electrode diameter do not significantly affect the response. The findings indicate that by adjusting the parameters to the optimal level determined by the Taguchi method, the S-N ratio for T-S strength increases by 9.30%, and T-S strength increases by 12.42%. The findings of this study offer a thorough comprehension of enhancing the TIG welding approach and can be further refined by incorporating additional variables.

This dedication was motivated by a request from one of the GERAI KOPIMI FORUM (Gerakan Terintegrasi Masyarakat Koperasi Dan Usaha Mikro) located in Lamper Lor, South Semarang, so that Lamper Lor, UMKM South Semarang could reach a wider market. With the COVID-19 pandemic, product marketing must be transformed using internet media, due to the limited space for product marketing. USM community service team through the Community Service program will provide assistance to the UMKM Forum Gerai Kopimi Semarang Selatan using social media to promote their products more broadly. Armed with information technology knowledge, especially in the field of marketing using social media and product shooting techniques owned by the service team, it is hoped that they will be able to expand the reach of marketing their products. This activity will be carried out in several stages, First, conducting field surveys related to partner problems, Second, designing the most appropriate methods for utilizing social media for product marketing and designing the most suitable packaging designs for products so that they can increase the value of partner products. Third, conduct training for partners to optimize social media in marketing products. Fourth, evaluate the results of the training. The positive response was given by almost all participants who wanted to use the Instagram platform as a medium for promoting products of UMKM and felt satisfied with the training provided, so they wanted more training.

Brushless DC (BLDC) motor is a three-phase motor that cannot work directly with DC current but requires electronic commutation to replace the brush function in DC motor. This paper aims to implement BLDC motor driver integration based on bootstrap circuit using Autodesk Eagle. The driver board consist of bootstrap circuit based on IR2110, MOSFETs, three voltage regulator, ESP32 microcontroller and ACS712 current sensor connection, logic level converter, and BLDC hall effect signal sensor conditioning. The research proposes bootstrap capacitor calculation based on charging/discharging capacitor principle and the minimum motor speed rotation. The implemented driver has 14x10 cm dimension tested to drive 24V/135W/6000rpm sensored BLDC motor using six steps commutation with pulse width modulation (PWM) inserted programmatically in ESP 32 to drive the high side MOSFET of the driver without AND gate circuit. The effect of pwm frequency and dutycycle variation to the speed and current of the motor is investigated. The results showed that the driver with both 12 V and 24 V voltage source and 68 μF bootstrap capacitor work optimally in 20 KHz PWM frequency both in open loop and closed loop speed control test. The motor reach 129 W for the largest power and 5250 rpm for the fastest speed in 24 V supply.

Perkembangan teknologi yang pesat membuat kemudahan untuk mengakses data oleh umum sehingga dibutuhkan suatu perlindungan hak cipta guna melindungi hak perihal pemilikan data secara legal. Audio watermarking yang diusulkan menanamkan informasi bit biner ke dalam sebuah media digital berupa audio yang tidak menyebabkan kerusakan pada media yang disisipi informasi. Penelitian ini menggunakan kombinasi metode DWT dan Histogram. Hasil yang diperoleh berupa audio terwatermark yang mempunyai kualitas tinggi dan tidak menimbulkan dampak berati terhadap sinyal informasi yang telah disisipkan dengan menggunakan parameter Bit Error Ratio (BER). Pada penelitian ini, rata-rata BER yang didapat saat dilakukan serangan LPF adalah 0.07952. Sehingga metode ini mempunyai ketahanan yang tinggi. Sedangkan tanpa serangan watermark dapat terekstrak sempurna tanpa kerusakan dengan BER=0.

Transformers are crucial equipment in electrical distribution systems but have a significant potential for failure. Insulation materials, including transformer oil (TO), play a primary role in transformer failures. A fire involving the TO can lead to a large explosion, causing the main tank to rupture and resulting in extensive damage to the entire transformer and the surrounding area. Mineral oil (MO) is the most widely used type due to its availability and relatively low cost compared to other types of oil. However, MO has a critical disadvantage, which is its very low flash point. The low flash point makes MO highly flammable. When the oil fires in an enclosed space, such as a transformer tank, the pressure inside the tank increases, leading to a large explosion. Therefore, research on increasing the flash point of MO is highly necessary. The application of nanotechnology is a promising approach to increasing the flash point of base fluids. Research on the effect of nanoparticles (NPs) on flash points is very limited in the literature; thus, there is significant potential for further research in this field. The majority of studies indicate an increase in flash points with the addition of NPs to MO. There is only one study that shows a decrease in flash point, which is −1.33% compared to MO. From all the reviewed studies, it can be concluded that NPs are a potential solution to increase the flash point of MO. Despite their benefits, NPs require a thorough examination of health and environmental impacts, along with proper waste management, to ensure their advantages.

Smoke-salted duck eggs (SDEs) one of Indonesia's most well-known egg food preservation methods. It not only increases the shelf life of smoked-salted duck eggs, but it also imparts a distinguishable flavor and taste to them. The SDEs process requires a boiling/steaming process that requires fuel for about 30% of the total energy required. The water content in water hyacinth is around 90%, which provides an opportunity to be used as a fuel that eliminates the boiling/steaming process. The water hyacinth (Eichhornia Crassipes) has never been used to produce SDEs as an alternative energy source. The dry bulb's temperature was kept below 95 o C. The relative humidity was managed to keep above 40% for the first two hours and 30% for the next six hours for the three different blended fuels (TDBF) methods for smokesalted duck eggs. The TDBF smoking method has significantly benefited from water hyacinth in the smoked salted duck egg process. The high water content of water hyacinth is advantageous so that the boiling/steaming process is successfully eliminated. The smoke-salted duck eggs processed using the TDBF smoked method had an egg maturity of more than 60% after 1.5 - 2 hours and around 100% after 3 -6 hours

The home industry has an important role in improving the community's economy. Energy needs also increase, with this the existing load on the home industry becomes more varied, especially inductive loads that cause a decrease in power factor, this needs to be overcome by improving the power factor by adding a compensator to the network. Because production on a home industry scale is not as continuous in large industries, a power factor improvement tool is needed that works automatically. This study aims to design a power factor improvement tool that works automatically to improve the power factor in the home industry, where the tool works according to network requirements. The Arduino micro controller is used as an automatic controller in the design of this power factor improvement tool, with input using a voltage sensor and a current sensor SCT-013, which is then processed by Arduino to get the power factor value and control the relay to adjust the capacitor requirements to compensate for the inductive load on the network. The results of this study are that the power factor in the household industry can be improved to more than 0.9, the power used in the network is more effective and is absorbed by the load more effectively and the reactive power in the network becomes small or even non- existent.

This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.

This article present the optimization work describes out to joint the dissimilar galvanized steel of SECC-AF (JIS G 3313) and SGCC (JIS G 3302) material. A zinc coating on the surfaces of the galvanized steel sheets will decrease the weldability characteristic of the material. This study used dissimilar galvanised steel sheets to obtain the highest tensile shear strength from the specified resistance spot welding. This research used the Taguchi method with 4-variables and mixed-experimental levels. The mixed-experimental level, namely 2-experimental levels for the first variable and 3-experimental levels for other variables. The highest tensile shear strength was achieved in 5282.13 N. This condition is achieved at a squeezed time of 20 cycles, 27 kA-welding currents, welding time of 0.5 seconds, and holding time of 18 cycles. The S/N ratio analysis has shown the welding current had the most significant effect, followed by welding time, squeeze time, and holding time. The delta values of S/N ratio were 0.79, 0.64, 0.26 and 0.07, respectively. The ANOVA analysis has shown that the P-value of welding current and welding time is 0.006 (0.6%) and 0.015 (1.5%), respectively. This result is expected for optimizing resistance spot welding quality in other materials or significant aspects.

Self balancing robot is a two-wheeled robot that only has two fulcrums so that this robot is an unbalanced system. Therefore, a control system that can maintain the stability of the robot is needed so that the robot can keep in standing position. This study aims to design a self-balancing robot and its control system which improves the robot's performance against the maximum angle of disturbance that can be overcome. The control system used is based on fuzzy logic with 9 membership functions and 81 rules. The control system is applied to the ESP-32 microcontroller with the MPU-6050 sensor as a feedback position of the robot and DC motor as an actuator. Complementary filters are added to the MPU-6050 sensor readings to reduce noise to obtain better robotic tilt angle readings. The improvement of this research compared to previous research based on fuzzy is the addition of the number of membership functions from 7 to 9 and the embedding of a complementary filter on the MPU-6050 sensor output reading. The result shows that the designed self balancing robot which has dimensions of 10cm x 18cm x 14.5cm can cope with the maximum disturbance angle up to 17.5⁰.

This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 110oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a outer diameter of 87.8 mm or 3.46 inches and will experience an internal pressure of about 20.84 psi or 143.7 kPa, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 0.0453 inches on the shell side and 0.0435 inches on the head/head side. The thickness of the material used on the shell side and head/head is 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 232.1 psi or 1600 kPa.

Kartu bisnis masih sering digunakan pada saat ini, namun ada beberapa kekurangan yang membuatnya terasa tertinggal dan akhirnya akan tergantikan. Kartu bisnis memiliki keterbatasan dalam menampilkan informasi dan terkesan monoton sehingga tidak menarik. Teknologi Augmented Reality dapat membuat kartu bisnis konvensional menjadi kartu bisnis digital (Virtual Business Card). Virtual Business Card dapat menampilkan banyak informasi yang sebelumnya tidak dapat ditampilkan pada kartu bisnis konvensional, dan lebih interaktif dalam menampilkan informasi sehingga dapat menarik minat pengguna. Metode pengembangan yang digunakan dalam pembuatan aplikasi Virtual Business Card adalah Agile Development. Langkah-langkah penelitian ini adalah Planning, Design, Coding, dan Testing. Pada pengujian aplikasi ini, dilakukan dengan pengujian alpha berupa functional testing (uji black box) dan pengujian beta berupa usability testing (uji ahli media dan uji pengguna aplikasi). Penelitian ini menghasilkan aplikasi Virtual Business Card yang berisi data informasi digital yang dapat digunakan untuk keperluan pribadi. Dari hasil pengujian yang dilakukan, aplikasi dapat dikategorikan “Sangat Baik” sehingga aplikasi dapat dinyatakan layak untuk digunakan sebagai informasi digital pribadi. Berikut ini hasil dari masing-masing pengujian. Hasil pengujian alpha berupa functional testing, yaitu black box mendapatkan persentase 100%. Hasil pengujian beta berupa usability testing, yaitu uji ahli media mendapatkan persentase 89,88% dan uji pengguna mendapatkan persentase 84%. Abstract Business cards are still often used today, but some functions can still be optimized to cover the shortcomings of business cards, so they are not left behind and replaced. Business cards have limitations in displaying information and are not interactive, making them less attractive to use. Augmented Reality (AR) technology can make conventional business cards into digital business cards (Virtual Business Cards). Virtual Business Cards can display much information that previously could not be displayed on conventional business cards and is more interactive in displaying information so that it can attract the user's interest. The development method used in making Virtual Business Card applications is the Extreme Programming type of Agile Development. The steps of this research are Planning, Design, Coding, and Testing. In testing this application, alpha testing is done in the form of functional testing (black box test) and beta testing in the form of usability testing (media expert test and application user test). This research resulted in a Virtual Business Card application that contains digital information data that can be used for personal use. From the results of tests conducted, the application can be categorized as "Very Good" so that the application can be declared eligible for use as personal digital information. The following are the results of each test. Alpha test results in the form of functional testing, namely, the black box test get a percentage of 100%. The results of beta testing are in the form of usability testing, i.e., media expert tests get a percentage of 89.88%, and user tests get a percentage of 84%.

XYZ is a company engaged in the paper industry, which is located in West Java. Since established in 1976, this company has produced photocopy paper in the form of reams. This company has advantages in terms of paper quality so that its products dominate the international market and the domestic market. With a very tight level of market competition, companies must continue to work optimally to continuously improve employee performance and company productivity. The purpose of this study is to plan an incentive-based employee wage system, which is suitable and in accordance with company conditions. Incentive wages are important as one of the main components to increase and maintain motivation, performance and work integrity. This research was conducted in the Finishing Department of the copy manual wrapping work unit. The method used are the Piecework method, the Halsey method, and the Rowan method. The result of this research is a comparison of the amount of wages between the wage system used by the company and the three methods of incentive pay as a company alternative. From the comparison of the three incentive wage design methods, the authors recommend the Halsey method as the best method that is able to provide benefits for both the company and for workers which we call dual mutualism. The Halsey method still guarantees a basic wage and a decent incentive wage for workers as a motivation to work faster and better.

Education, including vocational education, has an essential role in the development of complete human beings and the development of the Indonesian people as a whole. Human development must be done intact, which includes the development of thinking power, emotional intelligence, physical power, and mastery of science, technology, art and sport. Besides, human development is also expected to produce human capable of and able to play an active role in building the entire Indonesian society. The success or failure of the role of vocational education can be measured from the balance of these two objectives; there is the development of the whole person and the development of the entire Indonesian society. More specifically, the purpose of vocational education includes four main dimensions: Developing basic human qualities that include the quality of thinking power, emotional intelligence, physical power, to develop the instrumental quality/functional quality, namely the mastery of science, technology, art, and sport, strengthening identity as the nation of Indonesia, and maintaining the survival and development of the world. The following outlined the dimensions of the purpose of vocational education.

Aspek kognitif dan psikomotorik seringkali menjadi fokus utama yang ditingkatkan di banyak sekolah, sementara aspek afektif siswa yang berpengaruh terhadap sikap dan perilaku siswa sedikit kurang diperhatikan. Di MI Al Huda Malang, siswa tidak hanya dididik untuk menjadi individu yang berkarakter qurani melalui kegiatan ibadah dan muamalah, tetapi juga harus berjiwa pancasilais, serta tanggap dengan perubahan ilmu dan teknologi. Namun, sampai saat ini bentuk penyampaian kondisi sikap dan perilaku siswa masih dilakukan dengan cara konvensional, yaitu melalui surat dan pesan pribadi oleh guru/bagian konseling. Hal ini bisa menjadikan keterlambatan penyampaian dan kemungkinan tidak tersampaikan (surat hilang/ siswa lupa memberikan kepada orang tuanya) sangat besar. Salah satu penyebabnya karena belum terbentuk pemahaman dan keterampilan SDM tentang penggunaan sistem informasi tata tertib siswa ketika hendak diimplementasikan di sekolah MI-MTs Al Huda Malang. Oleh karena itu, diperlukan pengembangan sebuah sistem informasi tata tertib siswa untuk memantau perilaku dan sikap siswa di sekolah, serta sosialisasi dan pelatihan cara pemanfaatan sistem informasi tersebut. Kegiatan Pengabdian Kepada Masyarakat (PKM) ini bertujuan untuk mengembangkan sistem informasi, memberikan sosialisasi dan pelatihan kepada guru beserta tenaga pendidik tentang sistem informasi tata tertib siswa untuk memantau sikap dan perilaku siswa saat belajar di sekolah akan dilakukan. Tahapan-tahapan metode PKM yang digunakan adalah: 1) analisis kebutuhan dan situasi; 2) perencanaan dan pengembangan sistem informasi; 3) pengembangan buku pedoman penggunaan sistem informasi; 4) pengenalan dan pelatihan sistem informasi; dan 5) evaluasi hasil pelatihan. Kegiatan PKM ini menghasilkan sebuah sistem informasi yang dapat diakses secara online sebagai bentuk sarana informasi digital, serta peningkatan keahlian yang dimiliki oleh guru dan tenaga pendidik dalam mengelola dan mengembangkan sistem informasi di MI-MTs Al Huda, Kota Malang. Dengan demikian, diharapkan sikap dan perilaku siswa dapat terpantau dengan efektif dan efisien sehingga berdampak pada perbaikan dan perubahan perilaku siswa yang menjadi semakin lebih baik dan berakhlak.

Penelitian ini bertujuan untuk mengembangkan aplikasi berbasis Android untuk belajar huruf Al-Quran dan Bahasa Inggris. Aplikasi ini dikembangkan sebagai media untuk mempermudah penyampaian khususnya di TPQ (Taman Pendidikan Al-Quran). Sehingga tujuan dikembangkannya aplikasi ini adalah untuk membantu guru TPQ khususnya, dalam menyampaikan materi melalui media yang menyenangkan sekaligus dapat membantu siswa untuk belajar mandiri karena aplikasi ini dapat diinstal pada gawai anak sendiri di luar kelas. Aplikasi ini memadukan materi belajar membaca huruf Arab, dan Bahasa Inggris karena belum ada aplikasi yang memadukan keduanya dalam satu aplikasi, terlebih lagi kedua bahasa tersebut sudah dipelajari siswa Indonesia sejak dini. Aplikasi ini dikembangkan melalui software App Inventor 2. Aplikasi ini juga dilengkapi cara membaca tulisan Arab yang benar serta gambar yang menarik. Kemudian juga terbagi menjadi beberapa level untuk membantu memudahkan guru. Setelah dilakukan pengujian, aplikasi ini berhasil diimplementasikan pada Android. Aplikasi ini diharapkan dapat meningkatkan kemampuan siswa TPQ dalam belajar membaca tulisan Arab, Bahasa Inggris dan dapat digunakan di luar kelas.

Jaringan saraf tiruan (JST) merupakan pemroses informasi yang meniru cara kerja otak manusia, yaitu bentuk neuron (sel syaraf). Karena kelebihan ini, JST dapat dipakai untuk mengenali pola tertentu, pada penelitian ini pola notasi aritmatika. JST yang dipakai dengan metode perceptron. pola notasi aritmatika mulai dari notasi penjumlahan (+), pengurangan (-), perkalian (x), pembagian (/), dan sama dengan (=). Penentuan pengenalan pola notasi tersebut berdasarkan 3 inputan yang harus dimasukkan yaitu nilai bobot (w) = 0, nilai alpha (α) = 1, dan nilai threshold (θ) = 0. Tujuan dari penelitian yaitu mengetahui tingkat akurasi perhitungan excel dan program delphi pada pengenalan pola notasi pada jaringan saraf tiruan dengan metode perceptron. Metode penelitian dengan 3 cara yang dilakukan yaitu penentuan nilai inputan (x), penentuan nilai target (t), dan perhitungan nilai aktivasi. Hasil dari penelitian ini bahwa pengenalan pola notasi penjumlahan (+), pengurangan (-), perkalian (x), pembagian (/), dan sama dengan (=) dari kedua perhitungan baik secara manual pada program excel dan implementasi pada program Delphi dalam Jaringan Saraf Tiruan (JST) metode Perceptron, didapatkan hasil yang sama dengan selisih 0, sehingga dapat disimpulkan perhitungan manual dengan excel dan implementasi pada program Delphi untuk pengenalan pola notasi penjumlahan (+) adalah presisi. Kemudian untuk pengenalan pola lain seperti pengurangan (-), perkalian (x), pembagian (/), dan sama dengan (=) hasilnya antara perhitungan dan program juga sama. Kata kunci: JST, perceptron, notasi aritmatika.

Human Machine Interaction keeps growing and developing, one of development is through gesture recognition that detects acceleration in a movement. This technology has been applied in joystick Wiimote and Wii-nunchuk by Nintendo that is widely used all over the world. Two main challenges in using accelerometer are to eliminate the noise of the sensor and to cancel the detected gravity acceleration when the joystick is tilted. The noise and gravity acceleration may influence the data reading and create error accumulation, respectively. This work proposes an implementation of Kalman Filter and also a simple technique to eliminate the influence of the gravity acceleration as a solution to solve above problems in using accelerometer of Wii-Nunchuk joystick in Board Arduino Mega 2560. The experimental results in motionless position show that the filter can reduce the gravity acceleration. We have to set the initial value of q and R parameters in the estimation of position, speed, and acceleration using Kalman filter. Once R is decided, the change of q will determine Kk gain, and it will locate the poles of the observer that influence the stability and the estimation result. With R=0.00005 and q=1, the poles of Kalman filter are located in the unit circle so that the estimation is stable and appropriate with the data from the sensor and even cancel the noise.

Tracer Study (TS) atau yang disebut studi pelacakan merupakan penelurusan lulusan yang terkait dengan informasi kompentensi pendidikan tinggi di lingkungan dunia kerja professional yang bertujuan untuk mengetahui outcomes pendidikan tinggi. Hybrid Mobile Application merupakan aplikasi web yang ditransformasikan menjadi kode native pada platform seperti iOS atau Android, dengan hybrid aplication proses loading dan kinerja akan menjadi lebih cepat. Service Oriented Architecture (SOA) adalah sebuah skema yang memungkinkan komunikasi antar aplikasi dilakukan secara loosely-coupled, artinya masing-masing pihak tidak perlu punya ketergantungan yang tinggi satu sama lain. Aplikasi Hybrid Mobile Tracer Study dibangun dengan menggunakan metode SOA, dengan metode SOA tersebut dihasilkan sebuah aplikasi yang mempunyai service-service yang terintegrasi. Web service yang dibangun menggunakan data JSON sebagai data request dan response yang dikirim dari aplikasi mobile ke database server. Keyword : Tracer Study, Hybrid Mobile Application, SOA

Kekerasan seksual terhadap anak perempuan dapat memicu terjadinya PTSD (post-traumatic stress disorder) yang menyebabkan individu menjadi tidak berdaya seumur hidupnya. Penelitian ini bertujuan mengetahui pengaruh EMDR (Eye Movement Desensitization and Reprocessing)dalam menurunkan PTSD (post-traumatic stress disorder) yang diderita oleh seorang remaja putri korban inses yang didampingi oleh YLPA (Yayasan Lembaga Perlindungan Anak) DIY (Daerah Istimewa Yogyakarta). Subjek dalam penelitian ini yang mengalami PTSD adalah remaja puteri berusia 17 tahun dengan gejala PTSD sebagaimana diukur dengan IES-R (Impact of event scale-Revised). Penelitian ini dilakukan dengan desain eksperimen kasusu tunggal (single case experimental design) dengan desain A-B-A-B dan follow up. Wawancara dan observasi kualitatif juga dilakukan untuk melihat pengalaman subjektif subjek selama menjalani terapi EMDR. Perlakuan terapi EMDR dilaksanakan dalam tujuh sesi. Hasil penelitian menunjukkan menurunnya skor PTSD dari prates (skor 35), pascates (skor 4), dan follow up (skor 3). Hasil wawancara dan observasi juga menunjukkan bahwa subjek telah dapat mengelola emosi negatifnya, dan dapat mengontrol dirinya sendiri ketika melihat objek yang menstimulasi traumanya, serta telah dapat menemukan keyakinan baru yang positif. Berdasarkan termuan tersebut maka dapat disimpulkan bahwa EMDR dapat menurunkan skor PTSD yang diderita oleh remaja putri korban inses di YLPA DIY.

Dalam bidang Grafika Komputer Shadow Algorithm merupakan salah satu kajian yang menarik. Shadow Algorithm, suatu algoritma yang digunakan untuk menghasilkan sebuah bayangan objek pada suatu scene. Pengembangan berbagai shadow algorithm sudah banyak dilakukan. Klasifikasi algoritma menurut tipe interaktifitasnya dan hasil render dengan cepat (immediate render), algoritma terbagi menjadi dua yaitu real-time dan non-real-time. Sedangkan melihat dari bayangan yang dihasilkan terdapat dua jenis yaitu hard shadow dan soft shadow.

Motor arus searah (DC) menjadi populer karena fleksibilitas dan kemudahan dalam pengoperasiannya. Namun motor DC perlu diatur agar mempunyai kecepatan serta respon transien yang diinginkan terlebih ketika diberi beban. Penelitian ini bertujuan untuk merancang dan mensimulasikan alternatif pengendalian motor DC. Pengendalian yang digunakan adalah dengan metode Proporsional Integral Derivatif (PID) melalui root locus. Pada artikel ini akan dipaparkan pemodelan motor DC yang akan diperoleh fungsi alih antara kecepatan sudut dan input tegangan jangkar. Kemudian akan dilihat dan dirancang skema pengendalian dengan respon transien dan steady state yang diinginkan melalui root locus dengan menambahkan pole dan zero. Setelah disimulasikan, hasil perancangan kendali PID yang diperoleh telah sesuai spesifikasi yang diinginkan serta stabil dengan uji kestabilan Routh Hurwitz.

ABSTRAK Artikel ini akan menjelaskan perancangan kendali kecepatan MASTS dengan tujuan diperoleh respon kecepatan MASTS yang tanggap serta memiliki sinyal kendali dan arus minimal. Untuk mencapai hal ini MASTS akan dikendalikan melalui metode Linear Quadratic Regulator (LQR) dengan state yang dipilih adalah arus, kecepatan, dan state integral galat kecepatan. Diperlukan penalaan nilai parameter Q matriks bobot state dan R matriks bobot input untuk mendapatkan performa kecepatan dan arus yang terbaik. Berdasarkan pengujian diperoleh bahwa dengan kendali LQR-I, kecepatan MASTS dapat mengikuti set point dengan respon rise time Tr = 0,03 detik, settling time Ts=0,044 detik, overshoot (OS) 1,6 %, arus Imax=0,16 A dan dutycycle sinyal kontrol umax 56% pada kondisi tanpa beban dan Tr = 0,03 detik, Ts=0,044 detik, OS 1,6 %, Imax=0,16 A dan umax 56% pada kondisi berbeban. Dibandingkan dengan kendali PID ketika tanpa beban mempunyai Tr=0,0176 Ts=0,075 %OS=3,9% umax=96% Imax=0,35 A, LQRI mempunyai respon settling time, sinyal kendali dan arus yang lebih baik. Kata kunci: Motor Arus Searah Tanpa Sikat, Kendali Optimal, Linear Quadratic Regulator dan Integral ABSTRACT This paper aimed to discuss further research about BLDC motor speed control so that BLDC not only has fast speed response but also has minimum control signal and current using LQR (Linear Quadratic Regulator) control with chosen states are current, speed of BLDC, and speed error integral state. Tuning of Q and R matrix is required to reach the best speed and current performance. Where Q and R matrix is state cost matrix and input cost matrix, respectively. Result show that LQR-I control can track set point with rise time Tr = 0.03 s, settling time Ts=0,044 s, overshoot (OS) 1,6 %, current Imax=0,16 A and dutycycle control signal umax 56% in no load condition, and Tr = 0,03 s, Ts=0,044 s, OS 1,6 %, Imax=0,16 A dan umax 56% in the load condition. Compared to PID controller which has Tr=0,0176 Ts=0,075 %OS=3,9% umax=96% Imax=0,35 A in no load condition, proposed controller has a better settling time, control signal and current. Keywords: BLDC Motor, Optimal Control, LQR and Integral

Earthquake and tsunami disasters always bring negative impacts and losses for humans. The high frequency of earthquake disasters in Sulawesi and the massive impact of destruction and damage to infrastructure, loss of homes and property, and death of people are partly due to the lack of knowledge of this potential disaster by the surrounding community. Therefore, it is necessary to study the potential for earthquake and tsunami disasters on Sulawesi Island, and Lesson Learned about the Earthquake Disaster that has occurred in past. This study uses a qualitative method with a descriptive analysis design of secondary data obtained through a comprehensive literature review. The results showed that Sulawesi Island has a high potential for earthquake disasters, which is in the historical records of disasters, some of these earthquakes were accompanied by tsunami waves. The lesson that can be drawn from the earthquake in West Sulawesi is the potential for aftershocks after the opening earthquake and the main earthquake. In addition, the urgency of building earthquake-resistant housing structural mitigation is the key to safety during an earthquake. The post-earthquake recovery program in West Sulawesi requires further studies related to soil classification surveys, soil dominant periods, and soil seismic vulnerability index, as part of rebuilding a better and safer post-disaster area.

Pidie Jaya (Piday) District of Aceh Province is a newly formed district in 2007. In addition to the COVID-19 pandemic, the Pidie Jaya district also experienced a series of disasters throughout 2020. Nevertheless, the Piday District Human Development Index (HDI) in 2017 exceeded the National achievement. But piday district poverty ranks 3rd in the Province. This has the potential to make the Piday district prone to disasters in addition to geographical location factors. Therefore, the existence of such gaps in this study will be discussed. This study uses qualitative methods through descriptive narrative approaches. Sources of information and data were obtained through Focus Group Decision (FGD) from several sources and studies of some literature. The results stated that the gap is due to economic development being less evenly distributed and less felt by lower-level people. This is due to low education factors and lack of capital for farmers and fishermen as the majority of workers in Piday District. The research suggests increasing community capacity and resilience by 1) Improving the quality of human resources for farmers and fishermen in the form of education and training based on improving the economy and living standards of farming communities wrapped in local wisdom; 2) Infrastructure development both facilities and infrastructure; 3) Provision of capital and ease of access in business and insurance coverage against disasters by taking into account local wisdom; 4) Empowerment of the role and involvement of local community leaders in the formulation of policies and local government institutions.

The purpose of this research is to know the role of learning motivation, self-efficacy and family support in self-regulated learning of the 11th grade of SMA N 2 Bantul’s Students. There were as many as 248 students in the population of the 11th grade of SMA Negeri 2 Bantul and 72 of them were selected as samples using cluster random sampling technique. The data were collected by using learning motivation scale, self-efficacy, family support and self-regulated learning. The data analysis technique made use of multiple regression analysis and partial correlation technique. The regression analysis indicated positive correlation between learning motivation, self-efficacy and family support, and self-regulated learning with F value of 37.345, p = 0.000 (p < 0.05). There was positive impact of learning motivation to Self-Regulated Learning with t = 2.767, p = 0.007 (p < 0.05). There was a positive role of Self-Efficacy to Self-Regulated Learning with t = 3.532 and p = 0.001 (p < 0.05), a positive role of Family Support to Self- Regulated Learning with t = 2.267 and p = 0.027 (p < 0.05). This research can be used as a reference in the field of guidance and counseling, psychological counseling, or school psychology program within which it was mainly related to the increase in motivation, self-efficacy, social support families and self-regulated learning in learning activities of the students.

Due to the COVID-19 pandemic, learning activities have encountered obstacles. One of the impacts was the low learning outcomes achieved by students. The purpose of this study was to improve the learning outcomes of junior high school students during the physical distancing period by implementing problem-based learning through Smart Apps Creator 3. This Classroom Action Research (CAR) used Smart Apps Creator 3 as the platform during learning activities of junior high school students. The research subjects were junior high school students (VIII graders of SMP Negeri 8 Surakarta) with a total number of students was 32 which consisted of 16 males and 16 females. The results showed that the application of Smart Apps Creator 3 has improved students' learning outcomes. It has been proven that the average test score increased from 73.43 (pre-cycle) to 85.56 (cycle II). Moreover, the N gain score obtained was 0.45 (categorized as sufficient). In addition, the percentages of classical learning completeness were 59.37% (pre-cycle) and 93.75% (cycle II). Thus, the Smart Apps Creator 3 can improve student learning outcomes.