Jurnal Fisika Unand
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Analisis Korelasi Nilai Entrance Surface Air Kerma (ESAK) Terhadap Massa Tubuh, Usia, dan Faktor Eksposi pada Pasien Pemeriksaan Radiografi Umum di RSUP Dr. M. Djamil Padang
Get PDFResearch on the correlation analysis of Entrance Surface Air Kerma (ESAK) values on body mass, age and exposure factors in general radiography examination patients was carried out at RSUP Dr. M. Djamil Padang. Data collection was carried out on adult patients with body mass (50-70) kg and age over 15 years on examination of the abdomen, thorax and lumbar spine for 3 months with a total of 1,113 patients. The method used to determine correlation is simple linear correlation test analysis. The results of the study showed that the ESAK value had a fairly strong correlation with the patient's body mass with an rxy value = 0.25-0.4 except for the lumbar spine examination. The ESAK value has a fairly strong to strong correlation with the exposure factor (kV) with a value of rxy = 0.27-0.6 and has a strong to very strong correlation with the exposure factor (mAs) as indicated with a value of rxy = 0.45 -0.9, but has a very weak correlation with patient age with a value of rxy = 0.02-0.1 except for lateral thorax examination.Penelitian tentang analisis korelasi nilai Entrance Surface Air Kerma (ESAK) terhadap massa tubuh, usia, dan faktor eksposi pada pasien pemeriksaan radiografi umum telah dilakukan di RSUP Dr. M. Djamil Padang. Pengambilan data dilakukan pada pasien dewasa dengan massa tubuh (50-70) kg dan usia di atas 15 tahun pada pemeriksaan abdomen, thorax, dan lumbar spine selama 3 bulan dengan jumah data keseluruhan 1.113 pasien. Metode yang digunakan dalam menentukan korelasi adalah analisis uji korelasi linier sederhana. Hasil penelitian menunjukkan nilai ESAK memiliki korelasi yang cukup kuat terhadap massa tubuh pasien dengan nilai rxy = 0,25-0,4 kecuali pada pemeriksaan lumbar spine. Nilai ESAK memiliki korelasi yang cukup kuat sampai dengan kuat terhadap faktor eksposi (kV) dengan nilai rxy = 0,27-0,6 dan memiliki korelasi yang kuat sampai dengan sangat kuat terhadap faktor eksposi (mAs) ditunjukkan dengan nilai rxy = 0,45-0,9, namun memiliki korelasi yang sangat lemah terhadap usia pasien dengan nilai rxy = 0,02-0,1 kecuali pada pemeriksaan thorax lateral
Pemodelan Bawah Permukaan Daerah Vulkanik Jawa Tengah Berdasarkan Data Magnetik EMAG2-V3
Get PDFThis study aims to analyze the subsurface magnetic properties of the volcanic region in Central Java based on EMAG2-V3 magnetic data. The magnetic data were reduced to the pole (RTP) to eliminate the effects of magnetic field inclination and declination, resulting in anomalies that are more symmetric with respect to their sources. Subsequently, magnetic anomaly separation was performed to obtain the regional and residual components. The resulting residual anomalies were further analyzed through two-dimensional inversion modeling to map the distribution of subsurface magnetic susceptibility. The interpretation results indicate that the residual magnetic anomalies range from -260 to 340 nT. Meanwhile, the inversion modeling reveals that subsurface susceptibility values vary from -10 × 10⁻⁴ to 20 × 10⁻⁴ CGS. Low susceptibility values are generally found in active volcanic bodies such as Mount Merapi, Merbabu, and Sumbing, indicating the presence of hydrothermal alteration zones and magma pockets. On the other hand, higher susceptibility values are mostly found on mountain slopes, associated with the presence of fresh volcanic rocks rich in ferromagnetic minerals. These findings suggest that magnetic anomaly analysis can be an effective method for revealing lithology and subsurface geological structures on a regional scale.Penelitian ini bertujuan untuk menganalisis sifat kemagnetan bawah permukaan daerah vulkanik Jawa Tengah berdasarkan data magnetik EMAG2-V3. Data magnetik yang digunakan direduksi ke kutub (RTP) guna menghilangkan efek inklinasi dan deklinasi medan magnet, sehingga menghasilkan anomali yang lebih simetris terhadap sumbernya. Selanjutnya, dilakukan pemisahan anomali magnetik untuk memperoleh komponen regional dan residual. Anomali residual yang dihasilkan kemudian dianalisis lebih lanjut melalui pemodelan inversi dua dimensi guna memetakan distribusi suseptibilitas magnetik bawah permukaan. Hasil interpretasi menunjukkan bahwa nilai anomali magnetic residual berkisar antara -260 hingga 340 nT. Sementara itu, hasil pemodelan inversi mengungkapkan bahwa nilai suseptibilitas bawah permukaan bervariasi antara -10 × 10⁻⁴ hingga 20 × 10⁻⁴ CGS. Nilai suseptibilitas rendah umumnya ditemukan pada tubuh gunung api aktif seperti Gunung Merapi, Merbabu , dan Sumbing, yang mengindikasikan keberadaan zona alterasi hidrotermal dan kantong magma. Di sisi lain, nilai suseptibilitas banyak dijumpai di lereng gunung, yang diasosiasikan dengan keberadaan batuan vulkanik segar yang kaya akan mineral feromagnetik. Temuan ini menunjukkan bahwa analisis anomali magnetik dapat menjadi metode yang efektif dalam mengungkap litologi dan struktur geologi bawah permukaan secara regional
Implementasi Smart Irrigation System berbasis Komunikasi ESP-NOW dan Alternate Wetting and Drying (AWD) di Sawah Area Sumatera Selatan
Get PDFA Smart Irrigation System has been designed and implemented utilizing the Alternate Wetting and Drying (AWD) method and ultrasonic sensors to assist farmers in monitoring and maintaining the water level in rice fields to ensure it is at the level required by rice plants. This system sends a WhatsApp notification if the water level exceeds 15 cm above ground level. The ultrasonic sensor calibration results show an R2 value of 1.0, indicating that the sensor has met the linearity standard. Laboratory testing was conducted by varying three water conditions: below ground level 15 cm; exactly 15 cm above ground level; or more than 15 cm from ground level. Communication between the sender and receiver uses the ESP-NOW protocol. The results show that the sender successfully instructs the solenoid valve to open the tap when the water level is below 15 cm so that water can flow and close it again when the water level reaches 15 cm. There is a 7-second delay when the solenoid opens due to the Normally Closed (NC) type which requires high voltage and current. When the water level exceeds 15 cm above ground level, the system successfully sends a notification to the farmer (user) to drain the water from the field. Field tests in rice fields showed that the water level measurement of 25 cm was in accordance with the reference measuring instrument and successfully provided an accurate warning for farmers to turn on the pump so that the water level returned to the ideal status.Smart Irrigation System atau sistem irigasi cerdas telah dirancang dan diimplementasikan dengan memanfaatkan metode Alternate Wetting and Drying (AWD) serta sensor ultrasonik untuk membantu petani dalam memantau dan menjaga ketinggian air lahan sawah agar berada pada level yang diperlukan tanaman padi. Sistem ini mengirimkan notifikasi WhatsApp jika ketinggian air melebihi 15 cm di atas permukaan tanah. Hasil kalibrasi sensor ultrasonik menunjukkan nilai R2 sebesar 1.0, menandakan bahwa sensor telah memenuhi standar linieritas. Pengujian laboratorium dilakukan dengan memvariasikan tiga kondisi air: di bawah permukaan tanah 15 cm; tepat 15 cm di atas permukaan tanah; atau lebih dari 15 cm dari permukaan tanah. Komunikasi antara pengirim dan penerima menggunakan protokol ESP-NOW. Hasil menunjukkan bahwa pengirim berhasil menginstruksikan katup solenoid untuk membuka keran ketika air berada di bawah 15 cm sehingga air dapat mengalir dan menutup kembali saat tinggi air mencapai 15 cm. Terdapat penundaan selama 7 detik saat solenoid membuka akibat jenis Normally Closed (NC) yang memerlukan tegangan dan arus tinggi. Saat level air melebihi 15 cm di atas permukaan tanah, sistem berhasil mengirim notifikasi ke petani (user) untuk menguras air dari lahan. Uji lapangan di lahan sawah menunjukkan pengukuran ketinggian air sebesar 25 cm telah sesuai alat ukur referensi dan berhasil memberikan peringatan yang akurat agar petani menghidupkan pompa agar tinggi muka kembali ke status ideal
Privacy-aware fall detection and alert management in smart environments using multimodal devices
No full textFalls are a leading cause of injury and mortality, especially among the elderly. While camera-based fall detection systems have shown success, they raise significant privacy concerns. Alternatives using wearable sensors or thermal cameras offer comparable accuracy but have yet to be combined for accurate fall detection. Additionally, most research focuses on fall detection without addressing post-fall user’s condition or personalized alerts. This study aims to develop a privacy-aware fall detection system leveraging wearable sensors and thermal cameras. In addition, an alert system integrates devices such as voice assistants and speakers to assess the user’s status after the fall and notify the event. The system improves detection accuracy, addresses privacy concerns, and enhances alert management through personalized responses. We propose an Internet of Things (IoT)-based system integrating all sensors and devices previously mentioned. Edge-based computation enables real-time detection, with Internet connectivity used only for sending alerts in case of a fall. Various machine learning algorithms and sensor sources are evaluated to determine their impact on detection accuracy. Experimental results show that fall detection using a convolutional neural network with thermal images from three viewpoints achieves an F1-score above 0.98. Similarly, traditional machine learning algorithms applied to wearable sensor data showed high performance (0.93 F1-score). Post-processing techniques effectively remove false positives, improving reliability and adoption in real environments. The proposed system ensures high accuracy while addressing privacy concerns. By integrating multimodal devices and edge-based computing, it offers a scalable, real-time solution for smart environments, ensuring timely responses through personalized alerts after falls
PNT-65-GC-Plastificantes-Agua_SPME
No full textProcedimiento Normalizado de Trabajo, para la determinación de plastificantes emergentes en agua mediante GC-Q-OrbitrapMinisterio de Economía y Competitividad de España. Referencia Proyecto: PID2022-137122OB-I0
Influencia del contexto social y educativo y justificación del uso de la violencia entre jóvenes y adolescentes
No full textEn la sociedad actual cada vez más se dan a conocer la proliferación de actitudes violentas entre los y las adolescentes señalando a este grupo como origen de actos de violencia afectados por el fenómeno de la radicalización que puede llevar a extremismos violentos. En este estudio nos centramos en conocer de qué forma justifican la población los adolescentes el uso de la violencia y si las características del entorno, como las relaciones en el centro educativo, percepción de violencia en el contexto cotidiano, consumo de drogas y otros, tienen un papel importante en la justificación y en la predisposición del uso de la violencia. El total de la muestra participante ha sido de 1170 alumnos/as de institutos del poniente almeriense donde la media de edad oscila entre los 12 a 19 años. La recogida de datos se realizó mediante cuestionario validado y análisis de carácter cuantitativo. Los resultados muestran que las y los jóvenes y adolescentes justifican el uso de la violencia como una reacción frente a la influencia de factores externos vinculados con el contexto. Las implicaciones de este estudio estriban en informar la necesidad de desarrollar políticas educativas que supongan la prevención e intervención ante el desarrollo de conductas violentas y extremistas entre el alumnado
Effect of a high transmittance film cover on agronomic and microclimatic plant parameters in a greenhouse tomato crop
No full textThe increase of transmittance to photosynthetically active radiation (PAR) of the greenhouse cover improves photosynthetic activity and consequently can enhance crop yields. The changes in the light reaching the crops could influence the microclimate inside the greenhouse and affect the development of the crop and some fungal diseases. The main objective of this study was to compare a standard film cover with a high transmittance experimental film cover on growth, yield, fruit quality and microclimatic plant parameters of a tomato crop (Lycopersicum esculentum Mill.). The experiment trial was carried out inside a multispan greenhouse located in the Centre for Innovation and Technology Transfer “UAL-ANECOOP Foundation” in Almería (Spain). The naturally ventilated greenhouse (1800 m2) was divided transversely by a polyethylene sheet, creating two isolated sectors. The experimental cover film (90% transmittance) was installed in the West sector while the standard film (85% transmittance) was located in the East sector. On September 8, 2021, a tomato crop of cultivar ‘Ramyle’ was transplanted with a density of 1.2 plants m-2. The use of experimental film cover increased PAR radiation by 6% (not statistically significant). Leaf temperature increased by 5.4% in plants grown under the experimental film in comparison to the standard film, with statistically significant differences. The results of the tomato crop production show an increase in marketable and total yield of 0.21 kg m-2 (+4.2%) and 0.15 kg m-2 (+2.2%), respectively, in the West sector with experimental film cover. No significant differences were observed in any of the plant growth parameters (length and thickness of the stem, number of nodes and length of internodes) or fruit quality (weight, fruit diameter, firmness, soluble solids content, dry matter and colour parameters)
Educational discrimination and challenges of inclusion during the Pandemic: the case of students with autism spectrum disorder (ASD) from an international perspective
No full textBackground: The COVID-19 pandemic exposed the fragility of educational systems in ensuring inclusive schooling, especially for students with Autism Spectrum Disorder (ASD). Disruptions to daily routines, the shift to remote learning, and the suspension of specialized services intensified pre-existing inequalities and affected the educational continuity and well-being of this group. Methods: This narrative review analyzes the educational discrimination experienced by students with ASD during the pandemic. A structured search was conducted across databases including Scopus, Web of Science, PubMed, ERIC, Dialnet, and Google Scholar. Sixteen empirical studies published between 2020 and 2024 were selected based on criteria such as open access, focus on compulsory education, and direct analysis of pandemic-related exclusion. Results: The findings reveal four key challenges: unequal access to digital resources, the interruption of support services, increased family burden, and limited institutional responses. These factors contributed to emotional distress, regression in skills, and reduced participation in educational and social settings. Conclusions: The review concludes that the pandemic acted as a magnifying glass for structural barriers already present in inclusive education. Moving forward, educational systems must develop flexible, sustainable, and equity-oriented frameworks to ensure that students with ASD are not left behind during future crises
Greening the Path to Family Firm Innovation: Empirical Evidence From the Spanish Manufacturing Industry
No full textAre environmentally focused family firms really better innovators? This paper addresses this intriguing question and bridges the existing gap on the link between environmental investment and innovation within family firms, considering the mediating role of collaboration breadth, and the moderating influence of family management. Applying a moderated mediation analysis to an unbalanced panel dataset of 4836 observations of Spanish family firms, the results show that environmental investment has a positive impact on innovation. Collaboration breadth fully mediates the relationship between environmental investment
and innovation. Moreover, family management strengthens this mediating relationship. That is, the adoption of technological collaboration is more likely to occur in environmentally focused family firms when there is a higher number of family members in the firm's TMT, ultimately leading to improved innovation outcomes. This study contributes to understanding how family firm dynamics influence sustainability-driven
innovation, offering valuable insights for future research in this evolving field
Analisis Pengaruh Prisma Akresi dan Patahan Splay terhadap Deformasi Permukaan akibat Gempa Mentawai 2010 melalui Pemodelan Numerik 3D
Get PDFThe Southern Mentawai Segment is located in the Sumatra Subduction Zone, which is part of the accretionary wedge. The accretionary wedge is the most complex tectonic structure in the world within its material and geometrical structure. The 2010 South Mentawai earthquake, with magnitude Mw~7.8, was accompanied by a tsunami that was larger than expected for its magnitude, classifying it as a tsunami earthquake. This study analyze the effect of the accretionary wedge and faults in the South Mentawai Segment on surface deformation using 3D finite element modeling. The geometric model was constructed in four configurations: a model without an accretionary wedge, a model without an accretionary wedge but with splay fault, a model with an accretionary wedge, and a model with both accretionary wedge and splay fault. The results indicate that the model with the accretionary wedge aligns better to the data observed at GPS stations, particularly for the vertical deformation. The presence of splay faults in the model increases the vertical deformation by up to twice, both for the model with and without the accretionary wedge. A better understanding of the subsurface structure enables more precise identification of areas with potential earthquake-triggered tsunamis and more accurate surface deformation estimation.Segmen Mentawai Selatan terletak di zona subduksi Sumatra dan termasuk dalam struktur prisma akresi. Prisma akresi merupakan struktur tektonik yang sangat kompleks dengan adanya keberadaan berbagai patahan. Salah satu gempa besar yang pernah terjadi di segmen ini adalah gempa Mentawai Selatan pada tahun 2010 dengan magnitudo Mw~7,8. Gempa ini terjadi disertai dengan tsunami yang jauh melebihi estimasi berdasarkan magnitudonya sehingga dikategorikan sebagai tsunami earthquake. Studi ini bertujuan untuk menganalisis pengaruh keberadaan prisma akresi dan patahan di segmen Mentawai Selatan terhadap deformasi permukaan dalam bentuk 3D dengan menggunakan metode elemen hingga. Model geometri dibuat dalam 4 konfigurasi: model tanpa prisma akresi, tanpa prisma akresi dengan patahan splay, dengan prisma akresi tanpa patahan splay, dan dengan prisma akresi dan patahan splay. Hasil pemodelan menunjukkan bahwa model dengan prisma akresi lebih mendekati data pergeseran di stasiun GPS, terutama untuk deformasi pada arah vertikal. Patahan splay pada model menyebabkan kenaikan permukaan membesar hingga dua kali lipat baik pada model dengan prisma akresi maupun tanpa prisma akresi. Dengan mengetahui struktur lapisan bawah permukaan yang lebih detail, pemahaman tentang area dengan potensi gempa yang diikuti dengan tsunami menjadi lebih rinci dan estimasi deformasi permukaan dapat dilakukan dengan lebih akurat