Ata Syifa’ Nugraha’s scientific contributions

This research aims to analyze the effectiveness of learning media and mathematical logic intelligence on student learning achievement. This research was a quasi-experimental type with a sample size of 68 students consisting of an experimental class and a control class of 34 students each. The data analysis method uses two-way Anova. The results of this study indicate that there are (1) differences in learning achievement between students who study using YouTube compared to e-books; (2) differences in learning achievement between students with high versus low mathematical logical intelligence; and (3) the interaction between learning media and mathematical logic intelligence on student learning achievement.

Pendidikan Vokasional Teknologi Otomotif (PVTO) memiliki peran krusial dalam mempersiapkan mahasiswa untuk industri. Kemampuan menyusun karya ilmiah menjadi aspek penting, mencerminkan evaluasi pembelajaran dan pengembangan keterampilan analisis, sintesis, dan literasi informasi. Mahasiswa PVTO seringkali menghadapi kendala dalam penggunaan alat manajemen referensi Mendeley, berpotensi mengurangi kualitas karya ilmiah dan meningkatkan risiko plagiarisme. Terdapat kesenjangan pengetahuan mahasiswa PVTO terkait penggunaan Mendeley, membutuhkan langkah strategis untuk meningkatkan pemahaman dan keterampilan mereka. Kegiatan pengabdian ini menghadirkan pelatihan dan pendampingan mendalam mengenai Mendeley untuk mahasiswa PVTO, bertujuan meningkatkan efisiensi penelitian, literasi akademis, dan kepercayaan diri dalam menyusun karya ilmiah. Metode pelaksanaan melibatkan desain pelatihan, observasi lapangan, studi pendahuluan, serta evaluasi pemahaman mahasiswa sebelum dan setelah pelatihan. Pelaksanaan mencakup instalasi Mendeley, pembuatan akun, dan penggunaan aplikasi, dengan evaluasi yang mencakup beberapa indikator kunci. Hasilnya menunjukkan bahwa kegiatan PKM ini berhasil meningkatkan pemahaman dan keterampilan mahasiswa PVTO dalam pengelolaan referensi, terbukti oleh peningkatan signifikan dalam semua indikator evaluasi. Rata-rata nilai meningkat 62%, mencerminkan perbaikan yang konsisten. Meskipun positif, perlu perhatian terhadap kendala teknis dan peningkatan durasi pelatihan. Evaluasi kontinu diperlukan untuk memastikan efektivitas kegiatan pengabdian ini, yang diharapkan memberikan kontribusi positif terhadap mutu pendidikan vokasional di bidang teknologi otomotif.

Publikasi artikel ilmiah di jurnal terakreditasi memegang peran sentral dalam dunia akademik, terutama bagi mahasiswa bidang teknik. Meskipun sejumlah kegiatan Pengabdian Kepada Masyarakat (PKM) sebelumnya fokus pada peningkatan pemahaman dan keterampilan mahasiswa terkait penulisan artikel ilmiah, kegiatan PKM ini mengidentifikasi kebutuhan spesifik mahasiswa teknik untuk pelatihan dan pendampingan yang lebih komprehensif. Dalam rangka memenuhi kebutuhan tersebut, PKM ini menyelenggarakan pelatihan dan pendampingan khusus bagi mahasiswa teknik. Evaluasi dilakukan dengan mengukur kualitas penulisan artikel, kejelasan bahasa, kontribusi ilmiah, dan kesesuaian dengan pedoman jurnal terindeks SINTA. Tahap PKM melibatkan pengumpulan data awal, pelaksanaan pelatihan, pemberian tugas menulis artikel, pendampingan teknis, dan evaluasi menggunakan instrumen penilaian. Hasil dari kegiatan PKM berhasil meningkatkan secara signifikan kualitas penulisan mahasiswa. Skor kualitas artikel, kejelasan bahasa, kontribusi ilmiah, dan kesesuaian dengan pedoman jurnal terindeks SINTA mengalami peningkatan yang mencerminkan kemampuan mahasiswa dalam menghasilkan artikel yang lebih baik. Secara keseluruhan, kegiatan PKM ini memberikan kontribusi nyata dalam meningkatkan kemampuan mahasiswa teknik dalam menulis artikel ilmiah yang memenuhi standar jurnal terakreditasi SINTA. Relevansi dari peningkatan ini tidak hanya terbatas pada memenuhi persyaratan kelulusan, tetapi juga pada kontribusi mahasiswa dalam pengembangan ilmu pengetahuan di bidang teknik.

Increased exhaust emissions from motor vehicles have become a major concern in efforts to reduce air pollution. One developed solution is the use of transition metallic catalytic converter (TMCC) technology in vehicle exhaust systems. This study aims to compare the fuel consumption efficiency of three types of exhaust systems, namely standard exhaust without a catalyst (STD WC), the standard exhaust with Original Equipment Manufacturer catalyst (STD OEM), and an exhaust system equipped with a Copper-Coated Chrome Metallic Catalytic Converter (TMCC CuCr). The data analysis method employed a quantitative approach by collecting fuel consumption data at each rpm and analyzing the mean and standard deviation. The research findings indicate that STD OEM has a lower average fuel consumption (0.80 liters per hour) and smaller standard deviation (0.06) compared to TMCC CuCr (0.83 liters per hour and 0.07). Although TMCC CuCr demonstrates good efficiency, STD OEM remains the best choice in terms of fuel efficiency. However, if the differences in fuel consumption and standard deviation are considered insignificant, TMCC CuCr could be a more economical alternative with its affordable price and greater material availability. Furthermore, its fuel consumption performance is not significantly different from that of STD OEM.

Emissions produced by motorized vehicles greatly contribute to various environmental and health problems. One technology that is currently being developed to reduce the number of emissions in the environment is the catalytic converter. This technology is proven to be able to reduce exhaust emissions well, but how big the impact on engine performance (torque and power) still needs further research. The main objective of this study was to determine the impact of using chrome plated copper (CuCr) catalytic converters on engine performance. The vehicle used in the test is a Yamaha Vixion Lightning 150 CC. Engine performance (torque and power) was measured using the Inertia Chassis Dynamometer test instrument with the SAE J1349 standard. The findings of this study indicate that the use of experimental exhaust results in a decrease in vehicle torque and power. This is certainly a compromising factor that must be accepted, considering that installing a catalyst is the same as increasing the exhaust gas flow barrier. The decrease in torque and power is still in the acceptable category, considering that the average decrease only occurs at about 5% for torque and 7% for power. All these arguments show that since the main purpose of using catalytic converters is to lower exhaust emissions, it makes engine performance lower than expected.

Kompetensi tune up sepeda motor, khususnya pada bagian sistem injeksi bahan bakar, yakni pembersihan injektor menggunakan alat injector cleaner merupakan kompetensi yang penting dimiliki bagi mahasiswa Prodi PVTO UBHI Tulungagung. Sistem bahan bakar sepeda motor zaman sekarang rata-rata menggunakan sistem injeksi, tidak lagi menggunakan sistem kaburator. Namun, alat injector cleaner masih belum dimiliki oleh Prodi PVTO untuk menunjang perkuliahan. Tujuan pada penelitian ini yakni membuat alat Automotive Injektor Cleaner (ATOMIC) untuk memenuhi kebutuhan peralatan penunjang praktikum teknologi sepeda motor. Metode yang digunakan dalam penelitian ini adalah perancangan, pembuatan, pengujian, dan analisa kinerja ATOMIC terhadap performa sepeda motor empat tak berteknologi EFI. Berdasarkan hasil dan pembahasan, diketahui bahwa terdapat peningkatan nilai daya torsi sesudah membersihkan injektor menggunakan ATOMIC. Pada aspek daya, nilai tertinggi sebesar 14,2 HP dimana sebelum menggunakan ATOMIC sebesar 13,8 HP pada 9000 RPM. Sedangkan pada aspek torsi, nilai tertinggi sebesar 12,32 N.m dimana sebelum menggunakan ATOMIC sebesar 112 N.m 6500 RPM. Dengan demikian, melalui hasil penelitian tersebut dapat disimpulkan bahwa ATOMIC yang telah dihasilkan layak digunakan sebagai penunjang perkuliahan Teknologi Sepeda Motor di Prodi PVTO Universitas Bhinneka PGRI. The competence of motorcycle tune ups, especially in the fuel injection system, namely the cleaning of the injector using an injector cleaner is an important competency for students of UBHI Tulungagung PVTO Study Program. Today's motorcycle fuel system uses an injection system on average, no longer using a carburetor system. However, the injector cleaner tool is still not owned by the PVTO Study Program to support lectures. The purpose of this study is to make Automotive Injector Cleaner (ATOMIC) tools to meet the needs of motorcycle technology practicum supporting equipment. The method used in this study is the design, manufacture, testing, and analysis of ATOMIC performance on the performance of four-stroke motorcycles with EFI technology. The result of this study is the production of an ATOMIC that functions well and is ready to be used as a support for Motorcycle Technology lectures at the PVTO Study Program of Bhinneka PGRI University.

Performa kendaraan bermotor dapat dilihat dari torsi dan daya. Baik tidaknya kualitas pembakaran akan mempengaruhi performa (torsi dan daya) sepeda motor, baiknya kualitas pembakaran sejalan dengan performa. Proses pembakaran di ruang bakar dipengaruhi oleh beberapa faktor seperti temperatur, densitas, turbulensi udara, serta komposisi udara dan bahan bakar. Peningkatan turbulensi udara menjadi salah satu cara untuk meningkatkan performa mesin, dimana teknologi yang digunakan umumnya dikenal dengan sebutan jet ranger. Fungsi jet ranger adalah mengubah aliran angin yang semula linier menjadi vortex/spin/memusar. Penelitian ini berjenis eksperimen, dimana Honda Vario 150 cc menjadi objek penelitian. Metode pengujian torsi dan daya dilakukan berdasarkan standar Society of Automotive Engineering( SAE J1349). Temuan penelitian menunjukan bahwa jet ranger terbukti efektif meningkatkan performa (torsi dan daya) sepeda motor Honda Vario 150 cc. Setelah menggunakan jet ranger torsi meningkat disetiap putaran mesin dengan rata-rata peningkatan sebesar 15%. Peningkatan torsi terbesar pada putaran 3000 RPM yakni sebesar 30%, sedangkan peningkatan terendah terjadi pada putaran 9000 rpm yakni sebesar 2%. Berbanding lurus dengan torsi, daya juga mengalami peningkatan disetiap putaran mesin dengan rata-rata peningkatan sebesar 14%. Peningkatan daya terbesar terjadi pada putaran awal atau 1000 rpm yakni sebesar 66%, sedangkan peningkatan terendah terjadi pada putaran 9000 rpm yakni sebesar 3%. The performance of a motorized vehicle can be seen from the torque and power produced by the vehicle. Whether or not the combustion quality is good will affect the performance (torque and power) produced by the motorcycle, the better the combustion quality, the performance will be consistent with this. The combustion process in the combustion chamber is influenced by several important factors such as temperature, density, air turbulence, and the composition of air and fuel. Increasing air turbulence is one of the easiest ways to improve engine performance, where the technology used is generally known as a jet ranger. The function of the jet ranger is to change the originally linear wind flow to vortex/spin/swirl. This research is an experimental type, where Honda Vario 150 cc is used as the object of research. Torque and power testing methods are carried out according to the SAE J1349 standard. The findings of this study indicate that the use of a jet ranger has proven to be effective in increasing the performance (torque and power) of Honda Vario 150 cc motorcycles. After using the jet ranger, the torque increases at each engine speed with an average increase of 15%. The largest increase in torque occurs at 3000 RPM rotation, which is 30%, while the lowest increase occurs at 9000 RPM rotation, which is 2%. Directly proportional to torque, power also increases at every engine speed with an average increase of 14%. The largest increase in power occurred in the initial rotation or 1000 RPM, which was 66%, while the lowest increase occurred in the 9000 RPM rotation, which was 3%.

The development of automotive technology to reduce exhaust emissions from vehicles with spark-ignition engines uses catalytic converter technology. This experiment aims to determine the effectiveness of using brass as a catalyst in the spark-ignition engine. For carbon monoxide (CO) measurements on the spark-ignition engine, two muffler measurements were made. First using the AHM 18350-KEV-880 muffler, and second, using a muffler with a brass metal catalytic converter. Measurement of CO exhaust emission levels using an exhaust gas analyzer. The exhaust emission from the spark-ignition engine is measured according to SNI-19-7118.1-2005. The experiment results show that brass metal catalytic converters can significantly reduce CO and HC emission levels. The average reduction in CO emissions at each RPM is 52%, while the average reduction in HC emissions at each RPM is 29%.

The increasing population of motor vehicles can result in increased levels of exhaust emissions. The most significant contributor to exhaust emissions comes from motor vehicle exhaust. This study aims to reduce exhaust emissions, which will have an impact on reducing air pollution caused by motor vehicle exhaust gases. This research method is quantitative descriptive experimental with exhaust gas emission testing standards based on SNI 19-7118.3-2005. The test results show that the use of a heater in a Yamaha New Vixion Lighting motorcycle exhaust can reduce exhaust emissions CO and HC. By using an experimental exhaust one heater, it can reduce CO exhaust emissions by an average of 27.74%, and HC exhaust emissions by an average of 5.55. Whereas using experimental exhaust two heaters can reduce CO exhaust emissions by an average of 35.02%, and HC exhaust emissions by an average of 16.31.

Abstrak Populasi kendaraan bermotor yang terus meningkat dapat mengakibatkan peningkatan kadar emisi gas buang. Penyumbang emisi gas buang terbesar berasal dari knalpot kendaraan bermotor. Saat ini dunia otomotif (khususnya sepeda motor) berkembang sangat pesat. Sebagai alat transportasi tentunya sepeda motor juga membutuhkan performa mesin yang optimal. Banyak cara yang ditempuh oleh konsumen untuk menghasilkan sepeda motor dengan performa yang tinggi. Modifikasi yang sering dilakukan adalah dengan cara penggantian parts racing pada sepeda motor untuk mecapai performa yang diinginkan. Ada berbagai macam cara melakukan modifikasi pada mesin yang bertujuan untuk meningkatkan performa mesin sepeda motor. Salah satunya dengan modifikasi, heater pada muffler sepeda motor Yamaha New Vixion Lightning. Metode penelitian ini bersifat eksperimental deskriptif kuantitatif dengan standar pengujian performa mesin berdasarkan SAE J1349. Instrumen penelitian adalah tachometer, chassis dynamometer, thermocouple, thermo control, 4-in-1 multifunction environment meter, stopwatch, dan fuel meter. Analisis data menggunakan metode deskriptif kuantitatif dimana penelitian ini menggambarkan fenomena, baik yang bersifat alamiah ataupun rekayasa manusia. Hasil pengujian menunjukkan bahwa penggunaan heater pada knalpot sepeda motor Yamaha New Vixion Lightning dapat meningkatkan performa mesin. Hal ini ditunjukkan dengan meningkatnya performa mesin pada sepeda motor Yamaha New Vixion Lightning. Dengan menggunakan knalpot eksperimen 1 heater dapat mereduksi konsumsi bahan bakar rata-rata sebesar 28,19%, meningkatkan torsi rata-rata sebesar 6,53%, dan meningkatkan daya rata-rata sebesar 3,85%. Sedangkan dengan menggunakan knalpot eksperimen 2 heater dapat mereduksi konsumsi bahan bakar rata-rata sebesar 42,91%, meningkatkan torsi rata-rata sebesar 10,13%, dan meningkatkan daya rata-rata sebesar 10,23%. Kata kunci: Heater, knalpot, torsi, daya, konsumsi bahan bakar Abstract An increasing population of motor vehicles can result in increased levels of exhaust emissions. The biggest contributor to exhaust emissions comes from motor vehicle exhaust. Currently the automotive world (especially motorcycles) is developing very rapidly, as a means of transportation of course motorcycles also need optimal engine performance. Many ways traveled by consumers to produce motorbikes with high performance. Modifications are often done is to replace racing parts on a motorcycle to achieve the desired performance. There are various ways to make modifications to the engine that aims to improve the performance of motorcycle engines, one of them is by modifying mufflers on Yamaha New Vixion Lightning motorcycles. This research method is quantitative descriptive experimental with exhaust gas emission testing standards based on SAE J1349. The research instruments were tachometer, chassis dynamometer, thermocouple, thermo control, 4-in-1 multifunction environment meter, and fuel meter. Data analysis uses quantitative descriptive methods where this research describes phenomena, both natural and human engineering. The test results show that the use of a heater on a Yamaha New Vixion Lightning motorcycle exhaust can improve engine performance. This is indicated by the increase in engine performance on Yamaha New Vixion Lightning motorcycles. By using experimental exhaust 1 heater, it can reduce the average fuel consumption by 28.19%, increase the average torque by 6.53%, and increase the average power by 3.85%. Whereas by using the experimental exhaust 2 heater, it can reduce the average fuel consumption by 42.91%, increase the average torque by 10.13%, and increase the average power by 10.23%