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DESAIN DAN PEMBANGUNAN SEPTICK TANK PB. TANGKAS DESA RATNA CHATON KECAMATAN SEPUTIH RAMAN KABUPATEN LAMPUNG TENGAH Sriharyani, Leni; Wahyudi, Tri Cahyo; Nugroho, Dias Septa
SINAR SANG SURYA Vol 10, No 1 (2026): Januari 2026
Publisher : UM Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/sss.v10i1.4945

Masyarakat PB. Tangkas Desa Ratna Chaton Kecamatan Seputih Raman Kabupaten Lampung Tengah sebagian besar berprofesi sebagai petani. Pengetahuan dan ketrampilan masyarakat sangat rendah terutama tentang desain septick tank dan pembangunan septick tank yang sesuai standar kesehatan. Masih banyak masyarakat yang membangun septick tank yang asal-asalan, tidak sesuai standar, tidak faham jarak minimum septick tank ke sumur gali, Hal inilah yang dapat mencemari air tanah dan mencemari sumur gali yang airnya dikonsumsi sehingga berpotensi mengganggu kesehatan masyarakat. Melalui kegiatan Pengabdian yang dilaksanakan oleh Tim Pengabdi dari Program Studi Teknik Sipil Fakultas Teknik Univeritas Muhammadiyah Metro, masyarakat dibekali dengan pengetahuan desain septick tank yang baik dan benar. Selain itu juga masyarakat diberi kesempatan untuk mempraktekkan secara langsung pembangunan septick tank yang sesuai dengan gambar desain dan sesuai dengan standar kesehatan dengan didampingi oleh tim pengabdi. Hasil dan dampak nyata program pengabdian ini sangat terlihat jelas dari peningkatan pengetahuan masyarakat dan peningkatan ketrampilan dalam praktek membuat konstruksi septinktank. Harapan kedepannya adalah bukan hanya masyarakat Desa Ratna Chaton Kecamatan Seputih Raman saja yang bisa mendapatkan program pendampingan seperti ini, tetapi bisa meluas ke seluruh Kecamatan Seputih Raman Kabupaten Lampung Tengah. Sehingga masyarakat bisa hidup sehat tanpa ada pencemaran air dengan bakteri e-coli.

Structural Equation Modeling Based Partial Least Square of Student Misconceptions in Estimating Probability Distribution Parameters Wardhani Utami Dewi; Tri Cahyo Wahyudi; Miftahul Irfan
JTAM (Jurnal Teori dan Aplikasi Matematika) Vol 10, No 3 (2026): July
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jtam.v10i3.38398

Students' misconceptions in estimating the parameters of probability distribution are still an important problem in learning statistics in universities. Most previous studies have examined partial misconceptions from cognitive aspects, so the structural relationship between concept understanding, learning experience, learning motivation, and problem-solving skills in explaining misconceptions has not been widely analyzed in an integrated manner. This study aims to develop and validate a structural model that explains the factors that influence student misconceptions in estimating probability distribution parameters using the Partial Least Squares Structural Equation Modeling (PLS-SEM) approach. This study uses an explanatory quantitative design involving 200 students who have studied probability distribution and parameter estimation in several universities in Lampung Province. Data was collected through a Likert scale questionnaire that measured five latent constructs, namely concept comprehension, learning experience, learning motivation, problem-solving skills, and student misconceptions. The analysis was carried out through the evaluation of the measurement model (loading factor, composite reliability, and average variance extracted), structural model testing using the bootstrapping technique, and evaluation of the overall suitability of the model. The results showed that concept comprehension (β = 0.74) and learning experience (β = 0.82) had a significant effect on problem-solving skills. Problem-solving skills further affect learning motivation (β = 1.92), while learning motivation affects the level of student misconception (β = 0.67). The developed model was able to explain 65% of the variation in problem-solving skills and 88% of the variation in student misconceptions. This research contributes in the form of a SEM-PLS model that integrates cognitive and affective factors in explaining the emergence of statistical misconceptions, as well as providing an empirical basis for the development of more effective statistical learning strategies to reduce student misconceptions.

Pemberdayaan sekolah melalui implementasi sistem manajemen energi dan analisis berbasis artificial intelligence di SMK Muhammadiyah 3 Ambulu Asroful Abidin; Riyanto Setiawan Suharsono; Tri Cahyo Wahyudi; M. Kun Abdur Rohman; Yongky Eka Prasetiyo
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 10, No 2 (2026): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v10i2.38926

Abstrak Sekolah menengah kejuruan memiliki karakteristik konsumsi energi listrik yang tinggi akibat penggunaan peralatan praktik, laboratorium komputer, serta perangkat multimedia pembelajaran. Namun, sebagian besar sekolah belum memiliki Sistem Manajemen Energi (SME) yang terstruktur dan terdokumentasi. Kegiatan pengabdian kepada masyarakat ini bertujuan memberdayakan SMK Muhammadiyah 3 Ambulu melalui implementasi Sistem Manajemen Energi berbasis SNI ISO 50001:2018 serta integrasi analisis berbasis Artificial Intelligence (AI) untuk mendukung rekomendasi efisiensi energi. Mitra sasaran dalam kegiatan ini adalah civitas akademika SMK Muhammadiyah 3 Ambulu, dengan melibatkan partisipasi aktif 15 orang peserta yang terdiri dari 5 guru dan 10 siswa. Metode pelaksanaan dilakukan secara partisipatif melalui tahapan observasi, energy review, pengembangan Teknologi Tepat Guna (TTG) berupa aplikasi perhitungan energi, sosialisasi dan pelatihan, penyusunan SOP energi, serta monitoring dan evaluasi. Hasil kegiatan menunjukkan bahwa sekolah telah memiliki kebijakan energi, baseline energi, indikator kinerja energi (EnPI), serta identifikasi Significant Energy Use (SEU). Kegiatan sosialisasi meningkatkan literasi energi dan kesadaran budaya hemat energi. Program ini mendukung penguatan kapasitas kelembagaan sekolah menuju model Smart Green School yang adaptif terhadap teknologi digital dan berkelanjutan. Kata kunci: sistem manajemen energi; artificial intelligence; efisiensi energi; sekolah vokasi; pengabdian masyarakat Abstract Vocational high schools are characterized by high electricity consumption due to the use of practical equipment, computer laboratories, and multimedia learning devices. However, most schools do not yet have a structured and documented Energy Management System (SME). This community service activity aims to empower SMK Muhammadiyah 3 Ambulu through the implementation of an Energy Management System based on SNI ISO 50001:2018 and the in ;tegration of Artificial Intelligence (AI)-based analysis to support energy efficiency recommendations. The target partners in this activity are the academic community of SMK Muhammadiyah 3 Ambulu, involving the active participation of 15 participants consisting of 5 teachers and 10 students. The implementation method is carried out in a participatory manner through the stages of observation, energy review, development of Appropriate Technology (TTG) in the form of an energy calculation application, socialization and training, preparation of energy SOPs, and monitoring and evaluation. The results of the activity show that the school has an energy policy, energy baseline, energy performance indicators (EnPI), and identification of Significant Energy Use (SEU). The socialization activity increases energy literacy and awareness of an energy-saving culture. This program supports strengthening the institutional capacity of schools towards a Smart Green School model that is adaptive to digital and sustainable technology. Keywords: energy management systems; artificial intelligence; energy efficiency; vocational schools; community service

DESAIN DAN PEMBANGUNAN SEPTICK TANK PB. TANGKAS DESA RATNA CHATON KECAMATAN SEPUTIH RAMAN KABUPATEN LAMPUNG TENGAH Leni Sriharyani; Tri Cahyo Wahyudi; Dias Septa Nugroho
SINAR SANG SURYA Vol 10 No 1 (2026): Januari 2026
Publisher : UM Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/sss.v10i1.4945

Masyarakat PB. Tangkas Desa Ratna Chaton Kecamatan Seputih Raman Kabupaten Lampung Tengah sebagian besar berprofesi sebagai petani. Pengetahuan dan ketrampilan masyarakat sangat rendah terutama tentang desain septick tank dan pembangunan septick tank yang sesuai standar kesehatan. Masih banyak masyarakat yang membangun septick tank yang asal-asalan, tidak sesuai standar, tidak faham jarak minimum septick tank ke sumur gali, Hal inilah yang dapat mencemari air tanah dan mencemari sumur gali yang airnya dikonsumsi sehingga berpotensi mengganggu kesehatan masyarakat. Melalui kegiatan Pengabdian yang dilaksanakan oleh Tim Pengabdi dari Program Studi Teknik Sipil Fakultas Teknik Univeritas Muhammadiyah Metro, masyarakat dibekali dengan pengetahuan desain septick tank yang baik dan benar. Selain itu juga masyarakat diberi kesempatan untuk mempraktekkan secara langsung pembangunan septick tank yang sesuai dengan gambar desain dan sesuai dengan standar kesehatan dengan didampingi oleh tim pengabdi. Hasil dan dampak nyata program pengabdian ini sangat terlihat jelas dari peningkatan pengetahuan masyarakat dan peningkatan ketrampilan dalam praktek membuat konstruksi septinktank. Harapan kedepannya adalah bukan hanya masyarakat Desa Ratna Chaton Kecamatan Seputih Raman saja yang bisa mendapatkan program pendampingan seperti ini, tetapi bisa meluas ke seluruh Kecamatan Seputih Raman Kabupaten Lampung Tengah. Sehingga masyarakat bisa hidup sehat tanpa ada pencemaran air dengan bakteri e-coli.

Pendampingan Desain Perencanaan dan Pembuatan Halte Sampah Botol Plastik di Kampung Ratna Chaton Tri Cahyo Wahyudi; Leni Sri Haryani; Isnan Rinanda; Ziddan Alwi Asy'ari; Aria Arnan Meylano; Riky Andika Noor Efendi; Ifan Dewangga; Syahrul Hamid; Ikhsan Afandi Kurniawan; Adi Satria
SINAR SANG SURYA Vol 10 No 2 (2026): Mei 2026
Publisher : UM Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/sss.v10i2.4968

Permasalahan sampah plastik, khususnya botol plastik sekali pakai berbahan Polyethylene Terephthalate (PET), telah menjadi ancaman serius bagi kelestarian lingkungan global maupun lokal karena karakteristik materialnya yang sangat sulit terurai secara alami di alam. Di wilayah Kampung Ratna Chaton, Kecamatan Seputih Raman, minimnya infrastruktur pengumpulan sampah yang spesifik mengakibatkan limbah botol plastik seringkali mencemari lahan terbuka, pemukiman, hingga menyumbat saluran irigasi pertanian warga. Kegiatan pengabdian masyarakat ini bertujuan untuk melaksanakan pendampingan dalam desain perencanaan serta pembuatan unit "Halte Sampah Botol Plastik" sebagai sarana edukasi visual dan fasilitas pengumpulan sampah terpilah yang efisien bagi komunitas desa. Metode pelaksanaan yang diterapkan meliputi tahapan observasi lapangan secara partisipatif, diskusi terfokus bersama perangkat kampung, perancangan desain teknis berbasis material logam yang tahan lama, proses fabrikasi mekanik (pemotongan, pengelasan, dan pengecatan), hingga instalasi fisik serta sosialisasi masif kepada masyarakat. Hasil utama dari program ini adalah tersedianya satu unit fasilitas penampungan botol plastik yang estetik dan fungsional di lokasi strategis kampung. Dampak nyata dari program ini terlihat pada peningkatan kesadaran warga dalam memilah sampah botol plastik sejak dari sumber rumah tangga, yang secara signifikan mengurangi beban pencemaran lingkungan lokal. Melalui keberadaan halte sampah ini, botol plastik yang terkumpul secara terorganisir dapat dikelola lebih lanjut menjadi komoditas bernilai ekonomi tinggi atau disalurkan ke bank sampah. Secara keseluruhan, program ini berhasil menciptakan model pengelolaan sampah berbasis partisipasi komunitas yang berkelanjutan, meningkatkan kebersihan desa, dan menjadi langkah awal transformasi budaya masyarakat menuju pola hidup bersih dan modern di pedesaan.

Pengaruh temperatur elektrolit terhadap ketebalan dan kuat lekat baja karbon rendah pada proses elektroplating Asroni Asroni; Eko Budiyanto; Tri Cahyo Wahyudi; I Wayan Suarca
TURBO [Tulisan Riset Berbasis Online] Vol 10 No 2 (2021): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1755

The development of industry as well as science and technology requires humans to fulfill various kinds of needs in their lives. One of them is the need for metal-based goods. Many objects around us, both in the automotive industry and in the steel-based industry for household purposes, etc., are given a metallic finish to protect and beautify the metal. The metal coating technique that is often used in the metal industry is electroplating. Electroplating comes from two words, namely electro and plating or electricity and coating that uses a deposition system. The purpose of this study was to determine the effect of electrolyte temperature on the thickness and adhesive strength of low carbon steel in the electroplating process. The cathode used is low carbon steel with dimensions of 70 mm x 25 mm x 20 mm, while the anode used is Nickel (Ni) and the bath for plating is 60 cm long, 30 cm depth, and 30 cm wide. Two anodes on the right and left side of the anode with an anode-cathode distance of 10 cm, and using an electric voltage of 7.5 Volts, and using variations in electrolyte temperature of 450C, 500C, 550C, 600C, 650C and room temperature. From the results of the study found the optimal thickness value with 0.021 mm at a temperature of 600C. Meanwhile, the optimal value for coating adhesive strength from electroplating research is 60â„ƒ with a very high adhesive strength value of 26.53 MPa.

Pengaruh komposisi perekat dan diameter briket biopellet terhadap karakteristik dan temperatur pembakaran pada kompor gasifikasi Tri Cahyo Wahyudi; Sulis Dri Handono; Lukito Dwi Yuono; Rohyani Rohyani
TURBO [Tulisan Riset Berbasis Online] Vol 10 No 2 (2021): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1756

Biopellet is a type of solid fuel based on biomass waste which has a smaller size than briquettes. The purpose of this study was to determine the effect of adhesive composition and the effect of the diameter of biopellet briquettes on the characteristics and temperature and combustion time of the gasification stove. The method used was a mixture of 40% sawdust biomass and 60% coconut shell charcoal by varying the adhesive as much as 20%, 25%, 30% on 4 mm and 7 mm diameter biopellet briquettes. Based on the test results, it is known that the adhesive composition affects the temperature and time produced during combustion. The highest temperature reached 713.20C with an adhesive percentage of 20% at a diameter of 7 mm biopellet briquettes with a flash time of 26 minutes. While the lowest temperature reached 653.00C with 30% adhesive percentage on 4 mm diameter biopllet briquettes and 30 minutes of flame time. For the characteristics of biopellet briquettes from laboratory tests, the highest moisture content value was 8.10% in 30% adhesive at 4 mm diameter for the highest ash content value 9.45% at 30% adhesive variation at 4 mm diameter and the highest calorific value reached 4571.64 cal/g of 20% adhesive vari at 7 mm diameter.

Karaktristik proses destilasi asap cair grade 3 Kemas Ridhuan; Tri Cahyo Wahyudi; Danang Sulistiyo; Bahtera Anggara
TURBO [Tulisan Riset Berbasis Online] Vol 10 No 2 (2021): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1761

Distillation of liquid smoke is a process of heating liquid smoke based on the difference in its boiling point and then cooled to get liquid smoke with better quality. This heating aims to separate unwanted components in liquid smoke such as tar and benzopyrene. The process is strongly influenced by several things such as temperature and distillator. From these two measurements, several characteristics such as heating rate, distillation flow rate of liquid smoke, production capacity, heating temperature, steam temperature and distillation time, as well as the characteristics of the resulting liquid smoke can be known.The purpose of this study is to determine the characteristics of the 3rd grade liquid smoke distillation process with electric heating and water cooling condenser which includes the production capacity of liquid smoke and to determine the quality and quantity of liquid smoke, heating rate, electricity consumption, flow rate and to determine the efficiency of 2nd grade liquid smoke production.This research was conducted at the Laboratorium Teknik Mesin Universitas Muhammadiyah Metro, this study used a distillation apparatus made of Aluminium plate 1 mm thick, 180 mm in diameter, 250 mm high. Condenser with 0.5 inch diameter copper pipe 3,5 m long, 3 inch diameter PVC pipe, 3m long. The raw material for 3rd grade liquid smoke is 3 liters.The results obtained that the distillation apparatus has a capacity of 3 liters, the distillation temperature affects the rate of heating that occurs, namely the distillation temperature of 110oC, the heating rate is 707,42 J/second, the electricity consumption is 4,48kWh, the time is 45 minutes, and for a temperature of 120 oC the heating rate is 754,60 J/second, electricity consumption is 4,467 kWh in 65 minutes. The highest yield of liquid smoke is at a temperature of 110 oC, which is 2840 ml with a flow rate of 8,35 ml/minute and an efficiency of 94,6%, pH level of 2,15. And for a temperature of 120 oC it produces 2560 ml of liquid smoke, with a flow rate of 8,67 ml/minute and an efficiency of 85,3%, with a pH level of 2,10.

Pembuatan dan pengujian spot welding menggunakan travo daur ulang Tri Cahyo Wahyudi; Asroni Asroni; Bahtiar Abdul Rahman
TURBO [Tulisan Riset Berbasis Online] Vol 11 No 1 (2022): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.2087

Spot welding is very much needed for the home industry, but the expensive welding price and large welding power make spot welding less efficient for small industries. Therefore, spot welding with small power and easy-to-carry design is needed. Spot welding design process is carried out in stages, namely planning, explaining component functions, and testing variations in the welding time used. The method used is experimental by making and testing. The specimen used is a type 304 stainless steel plate with a thickness of 0.8 mm. selected stainless steel type 304 with a thickness of 0.8 mm using a lap joint, with variations in welding time of 10, 15, and 20 seconds, using a current of 550 Ampere. The test carried out is a shear test with the AWS D8.9-97 test standard, with the aim of this study to determine the optimization of spot welding equipment using a recycled transformer on the test results. From the results of the research that has been carried out, it can be concluded that in variations of electric current and welding time, the highest average shear stress value is found at 550 A electric current by welding for 10 seconds the average shear stress is 1,060,164 (N/mmÂ²) and the lowest average shear stress at an electric current of 550 A welding for 20 seconds the average shear stress is 564.578 (N/mmÂ²).

Kajian sifat listrik bayam merah dan daun kelor sebagai fotosensitizer pada DSSC solar cell Nurlaila Rajabiah; Tri Cahyo Wahyudi
TURBO [Tulisan Riset Berbasis Online] Vol 11 No 1 (2022): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v11i1.2119

DSSC (Dye Sensitized Solar Cell) uses dye as a sensitizer material which is used as an electron donor to TiO2 nanoparticles and uses an electrolyte as an electron transport medium. One of the dye extracts of purple spinach and moringa leaves used as a photosensitizer is chlorophyll extract or anthocyanin. The nature of chlorophyll which is able to absorb light is a function of the dye in DSSC. Making Moringa leaf and red spinach leaf dye after being blended, dried and ground into powder. Then the Moringa leaf powder was mixed with 70% ethanol with the ratio of Moringa leaves and ethanol, namely 1:2, 1:3, and 1:4. Meanwhile, red spinach leaf powder was mixed with ethanol solution in a ratio of 1:3. DSSC fabrication shows that the voltage, current, and power produced increases with the increasing amount of ethanol used, namely 1.879 mW, 1.573 mW, and 1.98 mW. Meanwhile, red spinach leaves mixed with ethanol in a ratio of 1:3 showed that the results were higher than Moringa leaves. So from the results of DSSC Solar Cell fabrication using Moringa leaves and red spinach leaves, it shows that there is light absorption from these materials and an increase in the conductive properties of Moringa and red spinach DSSCs.

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