Perbandingan Gradasi Butiran Sedimen Terendap Waduk Batujai dengan Material Bahan Kerajinan Gerabah Bukit Balibe

Sediment deposition is the main problem in the continuity of dam operations. Sustainable operation of dam can be maintained by dredging sediment deposited at the bottom of the impounding area. Because of the considerable costs and the lack of economic value of dam deposited sediment, dredging is carried out only when the serious sedimentation problem occurs. This research aims to analyse samples of sediment taken from various depths of Batujai Dam and to compare them with the pottery materials of Balibe Hill. Compositions of deposited sediment were analyzed to determine its potential as an alternative additional material used in pottery making. Comparisons were made based on the results of sieving analysis of material from both sources. The results show that the percentage of fine-grain material of Balibe Hill, especially grains with a diameter of ≤ 0.18 mm, is closer to the percentage of deposited sediment of Batujai Dam at an elevation of 92.5 masl and an elevation of 90.0 masl, while the percentage of coarse-grain material with a diameter of ≥ 3.35 mm is closer to the percentage of deposited sediment at an elevation of 87.5 masl. Gradation analysis indicates that composition of deposited sediment of Batujai Dam in sand grain classes can be engineered to some extent to make them closely identical to the composition of Balibe Hill materials so that it can be used as a mixture in pottery making

Peningkatan Kinerja Campuran Beraspal Panas dengan Penggunaan Aspal Modifikasi Zeolit

Damage to road pavement construction before reaching its planned lifespan can be caused by asphalt being easily oxidized and vulnerable to sunlight exposure.  Therefore, materials resistant to high temperatures should be used. One effort that can be done is modifying asphalt with zeolite. Zeolite contains silica, which can increase the binding strength between asphalt and aggregate and reduce the sensitivity of asphalt to temperature. The aim of this study is to analyze the characteristics of zeolite-modified asphalt with 3%, 5%, and 7% of the modified asphalt weight and its performance when applied to hot-mix asphalt. Asphalt characteristic tests include penetration tests, softening points, flash points, ductility, loss on heating, and specific gravity. Hot mix asphalt tests include the ability of the mixture to withstand loading, melting, Marshall quotient, Marshall immersion, and retained stability index. Based on the analysis, it can be concluded that the use of zeolite as an asphalt modifier increases the resistance to temperature changes of modified asphalt. The performance of hot-mix asphalt improved when using zeolite-modified asphalt compared to traditional asphalt mixtures. The recommended percentage of zeolite is 5% of the weight of modified asphalt, and the residual strength index achieved is 91.1%

Viabilitas Biji Kakao (Theobroma cacao L.) Perkebunan Rakyat Lombok Utara pada Berbagai Tingkat Kematangan: Implikasi Ekonomi dan Keberlanjutan

This study aimed to evaluate the effect of cocoa pod maturity on seed viability and early seedling growth in smallholder plantations of North Lombok, and its implications for economic efficiency and sustainability. The experiment was conducted using a factorial randomized complete design with three cocoa genotypes (Genotype-1, Genotype-2, and MCC-02) and three pod maturity levels (140, 150, and 170 days after flowering/DAF). The results indicated that seeds from physiologically mature pods (140 DAF) had the highest viability (germination rate 89.2% and normal seedlings 82.2%), whereas overripe pods (170 DAF) showed a significant decline (65.8% and 46.6%). Seedling growth up to two months was not significantly affected by pod maturity. Harvesting at 140–150 DAF proved more economically efficient by reducing nursery costs, while also supporting sustainability through the availability of high-quality seedlings without land expansion. These findings highlight the importance of appropriate harvest timing to enhance productivity and sustain smallholder cocoa production systems

Makrofauna Permukaan Tanah Di Bawah Satuan Pohon Campuran Alpukat, Kakao, dan Kopi Di Desa Senaru Lombok Utara

The presence of soil macrofauna can serve as an indicator of land quality changes, as high macrofaunal diversity generally reflects a healthier ecosystem. This study aims to assess soil macrofauna diversity in agroforestry land in Senaru Village, North Lombok, to provide an overview of soil ecosystem conditions in the area. The research was conducted in the Special Purpose Forest Area of Senaru Village on mixed tree stands of avocado, cacao, and coffee, from October to September 2023. The study employed a descriptive-quantitative method using the pitfall trap technique to collect macrofauna. Data were analyzed using Margalef’s species richness index (R), Shannon-Wiener diversity index (H’), and Pielou’s evenness index (E’).  The results indicate that the soil is slightly acidic (pH 6.4), with a moderate organic carbon content (2.45%) and adequate moisture levels (57%). High soil temperature (35°C) contributes to increased organic matter decomposition, while a litter layer thickness of 6.5 cm helps maintain soil moisture. Macrofauna diversity was classified as moderate, dominated by the phylum Arthropoda, particularly the family Formicidae (134 individuals). The families Rhoppalidae (Hemiptera) and Isotomidae (Collembola) were also abundant. Species richness indices showed that coffee and cacao stands had moderate species richness, whereas avocado had lower values. Macrofauna evenness was uneven, with the highest distribution in coffee stands (47%) and the lowest in avocado (34%). These findings suggest that the agroforestry land in Senaru Village still supports soil macrofaunal diversity, with tree species variations influencing species distribution and richness

Analisa Tebal Lapis Perkerasan Jalan Tgh. Faesal Menggunakan Metode Bina Marga 2017 dan AASHTO 1993

Roads have an important role for society, especially in economic growth and industrial development in an area. Based on BPS NTB data in 2023, the length of the Mataram City road is 460 km, where one of the roads in Mataram City, namely TGH.Faesal road, is a connecting road between Mataram City and West Lombok Regency, which can be interpreted as the main road entering Mataram City. so that the condition of the TGH.Faesal road must continue to be analyzed or reviewed regularly so that the condition of the TGH.Faesal road continues to be in good condition. This research uses secondary data obtained from the National Road Planning and Supervision of West Nusa Tenggara Province (P2JN NTB). the methods used are the Bina Marga 2017 and AASHTO 1993 methods. The analysis was carried out to determine the design comparison of each method. The Bina Marga 2017 method obtained the thickness of the actual load pavement layer and normal load, namely the surface layer of 17.5 cm, and the foundation layer of 30 cm. The AASHTO 1993 method obtained the thickness of the pavement layer, namely the surface layer of 18 cm, and the foundation layer of 52 cm

Uji Daya Hasil, Komponen Hasil, dan Morfofisiologi Beberapa Genotipe Padi Beras Merah dengan Sistem Gogo

This study aimed to determine the yield potential, yield components, and morphophysiology of several red rice genotypes under upland (gogo) cultivation system. The research was conducted from August to December 2024 in Wanasaba Village, East Lombok, West Nusa Tenggara. A Randomized Completely Block Design (RCBD) was used with 12 genotypes as treatments, consisting of  five lines:  19I-06-09-23-03 (G1),  21B-57-21-21-23 (G2), 23F-04-10-18-18 (G3), 23A-56-20-07-20 (G4), 23A-56-22-20-05 (G5), and 7 varieties: PBM UBB1 (G6), Danau Gaung (G7), Inpago 8 (G8), Inpago 12 (G9), Rindang (G10), Inpago Unram I (G11), and Beak Ganggas (G12), each replicated three times. The observed parameters including: relative leaf water content, chlorophyll content, number of days to flowering, number of days to harvesting, plant height, flag leaf length, total tiller number, productive tiller number, non-productive tiller number, panicle length, number of filled grains per panicle, number of unfilled grains per panicle, 1000-grain weight, weight of filled grains per clump, and yield per hectare. The data were analyzed using Analysis of Variance (ANOVA) at a 5% significance level. If significant differences were found, Duncan’s Multiple Range Test (DMRT) at the 5% level was conducted. The results of this study showed that red rice grown under upland conditions exhibited diverse yield potentials, yield components, and morphophysiological characteristics, except for traits such as number of days to flowering, leaf chlorophyll content, relative leaf water content, number of non-productive tillers, and number of empty grains per panicle. The highest yields were obtained on genotypes G4 (line 23A-56-20-07-20), G12 (Beak Ganggas), and G10 (Rindang), with yields of 5,81, 5,78, and 5,61 ton/ha respectively. Genotypes G4 and R have early harvest age, relatively moderate plant height, moderate number of productive tillers, moderate panicles, large number of filled grains with high weight of filled grains, namely G4 (36,30 grams) and R (35,10 grams). While BG (Beak Ganggas) has long panicles, large number of filled grains with high weight of filled grains, namely G4 (3605 grams), although the number of productive tillers is small

Manajemen Pengolahan Limbah Pabrik Gula Melalui Perhitungan Potensi dan Analisis Risiko untuk Mengurangi Dampak Pencemaran Lingkungan

Sugar factories process sugar cane into staples. Processing sugar cane into sugar cane can have an environmental impact. This is also experienced by PG XYZ during the milling period. The purpose of the research at PG XYZ is to measure the environmental impact of the sugar production process through life cycle assessment and risk management. The results of the life cycle assessment study showed that the two highest impacts of the sugar production process were climate change and respiratory inorganics. The results of the life cycle assessment study became a parameter in the risk management analysis. The results of the risk analysis obtained 2 extreme category sub-risks, 3 high category sub-risks, 14 medium category sub-risks, and 17 low category sub-risks

Implementasi Penentuan Lokasi Dalam Gedung Menggunakan LoRa RSSI Dan Jaringan Syaraf Tiruan Pada ESP32

Implementasi Penentuan Lokasi di dalam Gedung semkain banyak digunakan terutama pada fasilitas umum seperti sekolah dan rumah sakit dimana sinyal GPS tidak mampu memberikan akurasi yang maksimal. Pada penelitian ini akan dilakukan implementasi penentuan lokasi didalam Gedung dengan menggunakan nilai dari sinyal Received Signal Strength Indicator (RSSI) pada perangkat LoRA. Data RSSI yang dikumpulkan akan digunakan untuk melatih jaringan syaraf tiruan dengan menggunakan struktur empat neurons sebagai input, sepuluh neurons hidden dan lima neurons untuk output berupa hasil klasifikasi ruangan yang diberikan. Proses training dilakukan dengan menggunakan Python beserta numpy dan Pandas sebagai library-nya. Hasil dari training tersebut adalah berupa sejumlah weights dan bias yang digunakan sebagai external library pada ESP32 microcontroller.  Berdasarkan hasil pengujian data training, didapatkan bahwa ANN memberikan performa yang lebih baik jika dibandingkan dengan SVM. Pada ANN didaptkan nilai akurasi, presisi dan recall 0.90, 0.8666 dan 0.9333 secara berturut-turut. Sedangkan pada SVM didapatkan nilai akurasi 0.92 , presisi 0,7133 dan recall 0.6932 . dari hasil tersebut dapat dilihat bahwa ANN lebih akurat dalam hal meng-klasifikasikan ruangan yang memiliki pola nilai RSSI yang hampir mirip, seperti ruangan koridor. Hal ini memberikan informasi bahwa ANN sangat cocok diiimplementasikan untuk penentuan lokasi didalam Gedung dan sesuai untuk digunakan pada perangkat ESP32. Penelitian berikutnya diharapkan dapat menggunakan algoritma optimasi untuk mendapatkan nilai weight dan bias yang lebih baik

Analisis Perubahan Tutupan Lahan Di Ekosistem Mangrove Kecamatan Lembar Kabupaten Lombok Barat

West Lombok Regency. Using the Vector Geoprocessing method, the study processes and analyzes spatial GIS data, focusing on graphical data (geometry) and attributes (identity) through ArcMap Desktop. The main analysis techniques used include overlay analysis and buffer analysis, which are very important for spatial data analysis in GIS. This study uses mangrove distribution data from 1996-2021 which is analyzed to obtain the distribution of mangroves in the desired area. In Lembar District, there are four villages that have mangrove ecosystems, namely Eyat Mayang, Labuan Tereng, Lembar & South Lembar villages. In each village from year to year there is a change in area. The mangrove ecosystem in Lembar District from year to year has experienced an overall reduction starting from 1996-2021, experiencing a decrease of approximately 69%, namely from an area of 186 Ha to 59 Ha. However, there is one village that experienced an increase in mangrove ecosystems in 2016-2021, namely an increase of approximately 3 Ha. This cannot be separated from internal and external factors that occur so that they have an impact on changes in the mangrove ecosystem in an area. The factor that most influences changes in the area of mangroves is the existence of development in the area so that it has an impact on the mangrove ecosystem

Karakteristik Kehilangan Energi dan Potensi Tekanan pada Jaringan Irigasi Perforasi

The magnitude of energy loss in a piping network significantly affects the flow rate that the network can produce. Furthermore, it is important to understand the effect of changes in energy loss and pressure due to changes in the head of the water source. This allows the characteristics of these changes and their impact on the resulting flow rate and discharge to be used as important information in irrigation network design. This test aims to determine the characteristics of the secondary energy loss and residual pressure generated by a perforated irrigation network that uses three secondary network pipes as perforations. The irrigation test was conducted at four head variations: 3.5 m, 3.6 m, 3.7 m, and 3.8 m. The energy loss analysis used the Bernoulli equation, and major and minor energy losses were analyzed at each head variation, including the amount of available water pressure utilized to flow water through the perforated pipe holes. The analysis results showed that a 1 m increase in primary pipe length resulted in an increase in network energy loss of 0.02 m, and each 0.1 m increase in head from 3.5 m resulted in an increase in total energy loss of 0.01 m. At L1  a head of 3.5 m, the pressure is 2.12 m, and at a head of 3.8 m, the pressure is 2.36 m. At L2, the pressure head ranges from 1.97 m to 2.21 m, while at L3, the pressure head ranges from 1.84 m to 2.07 m. Therefore, every 0.1 m increase in head increases the pressure head by 0.08 m in the perforated irrigation network