Arifin Arifin

Monitoring physiological activity and sleep states in real time is challenging, particularly for continuous assessment in daily life settings using wearable IoMT devices. We developed a 24 h wearable system that integrates electrocardiogram (ECG) electrodes for heart rate measurement and a glove-mounted flex sensor for motor responses, connected through an Internet of Medical Things (IoMT) platform. Flex signals were combined using principal component analysis (PCA) to generate a single kinematic channel, then standardized with heart rate. Time-series windows were embedded using TS2Vec and clustered with DBSCAN, while t-SNE was applied only for visualization. The framework identified four physiologically coherent states: (i) nocturnal sleep with the lowest heart rate and minimal motion, (ii) evening pre-sleep with low movement and moderately higher heart rate, (iii) daytime activity with variable motion and mid-range heart rate, and (iv) late-day high-intensity activity with the highest heart rate and increased motor responses. A few outliers were observed during transient body movements or sensor readjustments, which were identified and excluded during preprocessing to ensure stable clustering results. Across 24 h, heart rate ranged from 52 to 96 bpm (mean 77.4), while flexion spanned 0 to 165° (mean 52.5°), showing alignment between movement intensity and cardiac response. This integrated sensing and analytics pipeline provides an interpretable, subject-specific state map that enables continuous remote monitoring of physiological activity and sleep patterns.

Minat siswa terhadap pembelajaran fisika sering kali menurun akibat metode pengajaran yang konvensional serta kurangnya interaksi aktif dalam proses belajar. Kondisi ini berdampak pada rendahnya pemahaman siswa terhadap konsep-konsep fisika yang abstrak dan keterkaitannya dengan kehidupan sehari-hari. Untuk mengatasi tantangan ini, tim pengabdian kepada masyarakat dari Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA), Universitas Hasanuddin (Unhas) menyelenggarakan pelatihan peningkatan kompetensi bagi guru Fisika. Pelatihan ini bertujuan untuk mengintegrasikan metode pembelajaran inovatif, seperti Experiential Learning dan Project-Based Learning, yang dirancang untuk menciptakan lingkungan belajar yang interaktif dan aplikatif. Metode pelatihan melibatkan empat tahapan utama yakni identifikasi permasalahan mitra, persiapan, pelaksanaan, dan evaluasi. Tahap identifikasi dilakukan melalui pertemuan daring dengan MGMP (Musyawarah Guru Mata Pelajaran) Fisika untuk menggali kebutuhan dan tantangan pembelajaran fisika di Sekolah. Pada tahap persiapan, tim menyusun materi pelatihan, membuat modul praktikum, serta menyiapkan alat dan komponen yang dibutuhkan. Pelaksanaan pelatihan dimulai dengan penyampaian materi, kemudian dilanjutkan dengan praktik langsung untuk memperkuat pemahaman guru terkait metode pembelajaran inovatif. Diskusi interaktif kemudian dilakukan untuk mendalami pemahaman dan menjawab pertanyaan yang muncul selama praktik. Tahap evaluasi dilakukan dengan mengamati antusiasme peserta selama pelatihan dan menilai keterlibatan mereka dalam diskusi serta praktik langsung. Keberhasilan kegiatan ini tercermin dari antusiasme peserta, baik selama penyampaian materi, praktik, maupun diskusi, serta motivasi yang meningkat untuk mengembangkan strategi pembelajaran yang kreatif dan aplikatif. Pelatihan ini diharapkan tidak hanya meningkatkan kompetensi guru, tetapi juga mampu meningkatkan kualitas pengajaran dan menarik minat siswa dalam pembelajaran fisika.

The education system in Indonesia is still in the fifth lowest position in the education index of ASEAN countries. Therefore, the government must take transformative steps to improve the Indonesian education system. This study examines the transformation of cultural values and their influence on achievement. This type of research is qualitative. The method used is a qualitative approach with a case study design. Data collection techniques are carried out through observation, interviews, and documentation. Data analysis is done by condensing, presenting, and drawing conclusions. The study results show that the cultural values that are transformed into the lives of school members are religious, social, cooperation, nationalism, and integrity values. These cultural values are transformed into non-verbal symbols by using the slogan 5S and caring for the environment and into verbal symbols by giving awards and praise for the performance of school members, conveying directly about the cultural values that are applied, giving encouragement and motivation to school members to have good ethics and morals, and giving encouragement to create a clean and healthy school atmosphere. The impact of the transformation of cultural values is to increase the motivation of school members to excel in academic and non-academic fields to create a superior generation with strong character and cultured with critical and analytical thinking.

Pembinaan dalam pengabdian ini bertujuan untuk mengembangkan ilmu kepada masyarakat khususnya kepada anak-anak sebagai regenerasi nantinya. Selain dipahamkan dan diajari tentang betapa pentingnya membaca Al-Qur’an dengan baik dan benar, mereka juga perlu dibekali dengan wawasan keislaman lainnya. Seperti halnya dengan pembinaan Fiqh Thaharah tentang pentingnya adab dalam bersuci. Sebagai ummat Islam wajib hukumnya mengetahui bagaimana tata cara bersuci dengan baik dan benar, karena bersuci merupakan titik awal daripada ummat islam sebelum melaksanakan ibadah lainnya. Pembinaan yang dilakukan pada anak-anak menggunakan metode konvensional, yakni metode ceramah pada saat memaparkan atau menjelaskan materi tentang adab dalam bersuci. Setelah materi sudah dipaparkan dan dijelaskan semuanya maka kemudian dilanjutkan dengan sesi tanya jawab. Anak-anak diberikan kesempatan untuk bertanya tentang materi adab dalam bersuci apabila masih ada yang kurang dipahami. Metode yang digunakan selanjutnya ialah menggunakan metode praktik, jadi setelah dijelaskan tentang adab dalam bersuci, anak-anak mempraktikkan per-individu secara bergantian, bagaimana wudhu secara baik dan benar. Adapun hasil daripada pelaksanaan pembinaan kepada masyarakat yang dikhususkan pada anak-anak adalah anak-anak antusias dalam mengikuti, menyimak dan mendengarkan pada saat materi dijelaskan, dan sangat antusias ketika praktik secara individu. Harapannya tentu kedepan mereka benar-benar menerapkan dan mengimplementasikan tentang betapa pentingnya adab atau etika ketika bersuci.

In this research, a urea level sensor based on plastic optical fiber was made using the macro bending method and two kinds of configurations. The sensor is made with a gamma and band configuration with a variety of cladding, no cladding, and imperfection and immersed in the urine sample which has different urea. This is aimed at determining the optimal sensor as a urea level sensor. The object measured was a urine sample with different urea concentrations ranging from 336.1mg/dL to 1384.3mg/dL, with the same volume for each concentration in the container or sample holder. The light from LED is transmitted through a plastic optical fiber, received by the phototransistor, then amplified by the differential amplifier, and converted by the microcontroller to voltage as the final results on the computer. Changes in urea levels result in changes in the refractive index around the sensor. The results showed that the more imperfection given to the plastic optical fiber sensor with gamma and band configuration, the better the range, sensitivity, and resolution. The best measurements were obtained in the band configuration with PANI-ZnO coating using six imperfections with the range value of 0.514 volts, the sensitivity value of 0.367mvolt/mgdL^-1, and the resolution value of 2.724mg/dL. The sensor is suitable for urea levels in medical, agricultural, or industrial applications with the advantages of high sensitivity, low cost, and ease of operation.

This research discusses sensors based on plastic optical fiber (POF) for concrete compressive tests and concrete tensile tests. Sensors are made of plastic optical fibers without coat attached to concrete surfaces or planted in concrete with straight, one bending, and two bending configurations. Sensors are attached to concrete with four configurations to find the best sensitivity and resolution values. The pressure on the sensor is related to the loss of power. The best sensor characteristic based on plastic optical fiber for concrete compressive test and the concrete tensile test is the sensor with two bending configurations that are planted in concrete. The sensitivity and resolution values in the concrete compressive strength test were 0.085 volts/kN and 0.047 kN. While the value of sensitivity and resolution of the concrete tensile test obtained is 0.082 volts/kN, and 0.048 kN. Sensor-based on plastic optical fiber has the advantage that is low cost and simple in measurement method that can be applied for monitoring the condition of the building structure.

This study aimed to describe the role of Musyawarah Guru Mata Pelajaran (MGMP) Civic Education in Malang City in enhancing the professional competence of teachers and to know the efforts in Increasing the professional competence of teachers. The researcher used qualitative descriptive method. Data collection techniques used observation, interview, and documentation. The results showed that the teachers of Musyawarah Guru Mata Pelajaran (MGMP) Civic Education played an active role in helping teachers to improve their professional competence. The effort in increasing the professional competence of teachers namely, conducts a seminar by inviting competent speakers. Keywords: MGMP, Civic Education, Professional Competence of Teacher

The research about milk fat content based on plastic optical fiber sensor using gamma and spiral spring without cladding configurations has been reported. LED light transmitted through the plastic optical fiber to be received by the phototransistor. Changes in milk fat content affect the light intensity received by the phototransistor. Sensor output voltage amplified by a differential amplifier and then the analog signal converted into the digital signal by the Arduino Uno microcontroller furthermore, the output voltage read on a computer. The milk fat content sample with a percentage of 0.773 % to 4.473 % affect the propagation of light in the core of plastic optical fiber results in power losses that occur so that the light intensity decreases and the output voltage measured becomes smaller. The results showed that the higher the milk fat content, the sensor output voltage decreases. The best measurements obtained on the spiral spring configuration with 4 windings produce value range 0.044 V, sensitivity 11.887 mV/%, and a resolution of 0.084 %. This method is effective as well as efficiently used as milk fat sensor because it has good sensitivity and resolution.

Research has been carried out about sensitivity enhancement of strain sensor based on polymer optical fiber used for concrete testing. Strain sensor testing was done by applying of pressure to the concrete using the Ultimate Testing Machine (UTM). Strain sensor was made from polymer optical fiber without coat with straight, U and rectangular configurations. At both ends of the sensor connected with Light Emitting Diode (LED), phototransistor and amplifier circuit that produces output value in the form of analog voltage that is converted by the Arduino Uno microcontroller into the digital voltage value displayed on the computer. The results showed that the greater the load given on the concrete, the greater the strain on the sensor, so that the output voltage read on the computer gets smaller. The best sensitivity value obtained at rectangular configuration with 3 cm amplitude is 0.117 V/cm with 0.008 cm resolution. Strain sensor in the concrete structures testing based on polymer optical fiber has advantages including low cost, simple measurement system, easy fabrication with high sensitivity.?

In this research, we measured heart rate by using sensors based on plastic optical fiber. These sensors are made from fiber optic material with three configurations, i.e., straight, sinusoidal, and spiral. Each sensor configuration was tested and paired in three positions of the human body, i.e., hand, chest, and neck. Each configuration and pairing position were tested for fast, normal, and slow heart rate condition. The light from the LED will propagate along the optical fiber sensor. If the sensor detects the heart rates, the intensity of light in optical fiber will be disrupted and causing loss of power so the light intensity will be smaller, it can be detected by the phototransistor and then converted into an electric voltage. The best measurement obtained in spiral configuration mounted on the neck in a slow heart rate condition with a sensitivity value 0.00231 V.s⁻¹ and a resolution 0.43203 s. This sensor has the advantage of easy fabrication, low cost, real-time measurement, high sensitivity, easy to operate and can be monitored via computer.