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Pengaruh Campuran Bahan Bakar Biodiesel Terhadap Performa Dan Emisi Gas Buang Pada Mesin Diesel Direct Injection
Get PDFABSTRAK
Peningkatan jumlah kendaraan bermotor meningkat pula penggunaan bahan bakar fosil. Hal ini berbanding terbalik dengan ketersediaan bahan bakar fosil yang semakin menipis maka tujuan dari penelitian ini menciptakan terobosan bahan bakar nabati / terbarukan sebagai penganti bahan bakar fosil dan mengetahui performa bahan bakar pada kendaraan. Salah satu alternatifnya adalah dengan menggunakan campuran biodiesel, pada bahan bakar biodiesel diperoleh dari B100 minyak sawit dilakukan pencampuran biodiesel minyak sawit dengan dexlite pertamina dengan perbandingan 700ml : 300ml menggunakan magnetic stirer dengan rpm tertentu. Setelah itu dilakukan pengujian performa dan opasitas gas buang dengan metode eksperimen dynotest dan smoke meter menggunakan engine diesel direct injection. Dengan variasi bahan bakar : BioSolar Pertamina, B30, B40, B50, B60 minyak sawit. Hasil pengujian performa dilakukan pada putaran 2000 rpm sampai 6000 rpm dengan interval 1000 rpm. kendaraan uji yang digunakan mesin Diesel Direct Injection pada putaran 2000 rpm menghasilkan torsi terbaik menggunakan bahan bakar B40 yang menghasilkan torsi 101,6 Nm. Daya tertinggi diperoleh pada putaran 2000 rpm menggunakan bahan bakar B40 yang menghasilkan daya 53,1Hp. Pengujian Opasitas Gas buang dengan bahan bakar B40 pada kondisi putaran rendah menunjukkan nilai pengujian 2,1%. Kesimpulan pada penelitian ini hasil terbaik variasi bahan bakar terjadi pada B40 yang menunjukkan nilai torsi dan daya tertinggi yaitu 101,6 Nm dan 53,1 hp serta opasitas yang rendah pada putaran rendah dengan nilai 2.1%.
Kata Kunci : Biodiesel, Performa, Emisi Gas Buang, Mesin Diesel Direct Injectio
PENGARUH HERDING BEHAVIOR DAN OVERCONFIDENCE TERHADAP KEPUTUSAN INVESTASI DENGAN FINANCIAL LITERACY SEBAGAI VARIABEL MODERASI : STUDI KASUS PADA MAHASISWA DI KABUPATEN PONOROGO
Get PDFPenelitian ini bertujuan menguji pengaruh Herding Behavior dan Overconfidence terhadap keputusan investasi, dengan Financial Literacy sebagai variabel moderasi pada mahasiswa di Kabupaten Ponorogo. Minat investasi di kalangan mahasiswa terus meningkat, namun sering kali tidak diimbangi pemahaman yang memadai, sehingga rentan terhadap bias perilaku dan pengaruh sosial. Penelitian ini menggunakan pendekatan kuantitatif dengan metode survei terhadap 100 mahasiswa yang aktif melakukan investasi. Data dikumpulkan melalui kuesioner dan dianalisis menggunakan uji instrumen, uji asumsi klasik, regresi linier berganda, serta Moderated Regression Analysis (MRA) dengan bantuan SPSS. Hasil penelitian menunjukkan bahwa Herding Behavior dan Overconfidence berpengaruh positif dan signifikan terhadap keputusan investasi. Selain itu, Financial Literacy memoderasi pengaruh Herding Behavior terhadap keputusan investasi, namun tidak memoderasi pengaruh Overconfidence. Temuan ini menegaskan pentingnya peningkatan literasi keuangan bagi mahasiswa untuk mengambil keputusan investasi yang rasional dan menghindari bias perilaku.
Kata Kunci : Herding Behavior, Overconfidence, Financial Literacy, Keputusan Investasi, Mahasisw
Pengaruh Kinerja Keuangan, Capital Intensity, Inventory Intensity, Kepemilikan Institusional dan Leverage terhadap Tax Avoidance pada Perusahaan Healthcare yang Terdaftar di Bursa Efek Indonesia 2020-2023.
Get PDFThis study aims to determine the effect of Financial Performance, Capital Intensity, Inventory Intensity, Institutional Ownership, and Leverage on Tax Avoidance. The population used in this study is Healthcare sector companies in 2020 - 2023. Using secondary data in the form of annual financial reports of companies obtained from the official website of the Indonesia Stock Exchange. The sampling technique chosen was purposive sampling based on certain criteria with a sample size of 56 data with a multiple linear regression analysis method using SPSS software version 25. The results of hypothesis testing on the Financial Performance variable partially show a significant effect on the Tax Avoidance variable. The Capital Intensity, Inventory Intensity, Institutional Ownership, and Leverage variables partially have no effect on Tax Avoidance. Simultaneously shows that Financial Performance, Capital Intensity, Inventory Intensity, Institutional Ownership, and Leverage have a significant effect on Tax Avoidance in Healthcare companies in 2020 - 2023
PENGARUH KEPEMIMPINAN, PENGHARGAAN DAN BUDAYA ORGANISASI TERHADAP KESEJAHTERAAN GURU DI SMK NEGERI NGADIROJO KABUPATEN PACITAN
Get PDFThis study aims to identify the variables that influence the well-being of teachers at SMK Negeri Ngadirojo. The approach used is quantitative, utilizing questionnaires administered to 86 teachers. The sampling method applied in this research is saturated sampling, in which the entire population is used as the sample due to the relatively small population size. SPSS version 25 software was used to assist in data analysis. The results indicate that both partially and simultaneously, the variables of leadership, rewards, and organizational culture have a positive and significant effect on teacher well-being. This shows that these factors play an important role in creating comfort, satisfaction, and a balance between work and personal life for teachers.
Keywords: Leadership, Rewards, Organizational Culture, Teacher Well-being
HUBUNGAN POLA ASUH ORANG TUA DENGAN KEJADIAN SIBLING RIVALRY PADA ANAK USIA PRA SEKOLAH DI TKIT 2 QURROTA A'YUN PONOROGO
Get PDFTHE RELATIONSHIP BETWEEN PARENTING PATTERNS AND THE INCIDENCE OF SIBLING RIVALRY IN PRESCHOOL-AGED CHILDREN AT TKIT 2 QURROTA A'YUN PONOROG
ANALISIS PERBEDAAN KECEMASAN MATEMATIKA SISWA DALAM MENYELESAIKAN MASALAH MATEMATIS BERDASARKAN GAYA KOGNITIF FIELD DEPENDENT (FD) DAN FIELD INDEPENDENT (FI)
Get PDFCintia Oktavia Sari. Analysis of Differences in Students' Mathematics Anxiety in Solving Mathematical Problems Based on Field Dependent and Field Independent Cognitive Styles. Thesis. Departement of Mathematics Education, Muhammadiyah University of Ponorogo. Advisor 1 Dr. Sumaji, M.Pd., Advisor 2 Dr. Arta Ekayanti, M.Sc.
This study aims to: (1) analyze the level of mathematics anxiety experienced by students with a Field Dependent (FD) cognitive style in solving mathematical problems; (2) analyze the level of mathematics anxiety in students with a Field Independent (FI) cognitive style; and (3) determine the differences in mathematics anxiety between students with FD and FI cognitive styles when solving mathematical problems.
This research employed a qualitative approach and was conducted at SMP Negeri 2 Babadan, with the primary subjects being students from class VII-A. Data collection techniques included a cognitive style test using the Group Embedded Figures Test (GEFT), a mathematical problem-solving test, and interviews. The data sources consisted of GEFT results, problem-solving test results, and interview transcripts. Data were analyzed through the stages of data reduction, data display, and conclusion drawing.
The results showed that students with a Field Dependent (FD) cognitive style tended to experience high levels of mathematics anxiety, influenced by external factors such as reliance on social environments, and internal factors such as low self-confidence and difficulty in understanding mathematical concepts. In contrast, students with a Field Independent (FI) cognitive style experienced mild to moderate levels of anxiety, mainly due to internal challenges such as difficulty recalling solution steps, but were supported by effective self-regulation strategies. Overall, FI students demonstrated a stronger ability to solve mathematical problems systematically and confidently compared to FD students, who relied more on external support and struggled to organize complex information. These findings confirm that cognitive style plays a significant role in shaping students' levels of anxiety and their ability to face and solve mathematical problems.
Keywords: Mathematics anxiety, cognitive style, Field Dependent (FD), Field Independent (FI), mathematical problem solving
PENGUATAN RASA SAYANG DAN CINTA SESAMA CIPTAAN ALLAH MELALUI OUTING CLASS DI EDUWISATA NDALEM KERTO
Get PDFAfifah Khoirianis. Strengthening Compassion and Love for God's Creation Through Outing classes at the Ndalem Kerto Educational Tourism Site. Thesis. Teacher Education Study Program Early Childhood Education, Muhammadiyah University of Ponorogo. Supervisor 1 Dr. Syarifan Nurjam, M.A., Supervisor 2 Dian Kristiana, S.Pd., M.Pd.
This study aims to describe the strengthening of compassion and love for fellow God's creations through Outing class activities at Eduwisata Ndalem Kerto.
This research is a qualitative descriptive study. Data collection techniques used were observation, interviews, and documentation. The instruments used for data collection included observations of the implementation of Outing classes to strengthen compassion and love for fellow God's creations in early childhood, interviews with the management regarding the Outing class concept at Ndalem Kerto Eduwisata, interviews with facilitators regarding the Outing class concept in strengthening compassion and love for fellow God's creations in early childhood, and documentation of participant attendance, modules, and books for the Ndalem Kerto Educational Tourism Outing class. Data analysis techniques used were data collection, data reduction, data presentation, and conclusions. Triangulation techniques were used to validate the findings.
The research results show that the Ndalem Kerto Educational Outing class activity effectively fosters early childhood love for God's creation through Piaget and Vygotsky's constructivist approach, which emphasizes direct interaction with nature. Learning modules such as peacock introduction, fish interaction, gardening, and goat introduction are designed to encourage direct experience (experiential learning). Interactive activities such as feeding fish and planting plants naturally foster children's empathy and responsibility for living things and the environment, while also forming an emotional bond with nature as God's creation. This approach ensures a focus not only on cognitive aspects, but also on character building, with facilitators as role models in respecting and caring for God's creation. Supported by thorough preparation and the Ndalem Kerto environment, these activities significantly contribute to the formation of children's characters who care and are responsible for nature and all its contents, reflecting the strengthening of compassion and love for fellow God's creations in every aspect of learning.
Keywords: Strengthening the Sense of Affection and Love, God's Creation, Outing class, Ndalem Kerto Educational Tourism
PENGARUH EDUKASI (SIMULASI DAN VIDEO) PERTOLONGAN PERTAMA FRAKTUR TERHADAP TINGKAT KETERAMPILAN ANGGOTA PMR DI SMAN 3 PONOROGO
No full textABSTRACT
THE EFFECT OF FIRST AID EDUCATION (SIMULATION AND VIDEO) FOR FRACTURES ON THE SKILL LEVEL OF PMR MEMBERS
At SMA Negeri 3 Ponorogo
Rara Ayu Firnanda
Fakultas Ilmu Kesehatan, Universitas Muhammadiyah Ponorogo
E-mail : [email protected]
Fracture is a condition of damaged bone or cartilage tissue, either partially or completely. First aid for fractures is done to prevent the condition from getting worse before the victim receives medical treatment, by applying a splint. This study aims to determine the effect of education through simulation and first aid videos on fractures on the skill level of PMR members at SMAN 3 Ponorogo.
The research design used pre-experimental with one group pretest-posttest research. The population in this study were active members of PMR at SMAN 3 Ponorogo with Purposive sampling technique, namely 38 respondents who met the inclusion criteria. Data analysis used the Wilcoxon Signed Rank Test with a significance level of <0.05.
The results of this study before the intervention of simulation education and fracture first aid video with splint dressing, as many as 32 respondents (84.2%) were in the less skilled category and 6 respondents (15.8%) were in the skilled category. After being given the intervention of simulation education and fracture first aid video with splint dressing, 35 respondents (92.1%) were in the skilled category while 3 respondents (7.9%) were in the less skilled category.
The results of statistical testing using the Wilcoxon Signed Rank Test showed a significant result of p value = 0.000 (p <0.05), so it can be concluded that there is an influence of education (simulation and video) on fracture first aid skills of PMR members at SMAN 3 Ponorogo.
Based on the results obtained from data processing using the Wilcoxone Signed Rank Test, which obtained a p-value of 0.000 (p < 0.05), the Simulation and Video Education was effective in improving the skills of PMR members at SMAN 3 Ponorogo in providing first aid for fractures with splints.
Keywords: Simulation, Video, PMR, First Aid, Fractur
PENGARUH PADUAN SERAT AREN DAN DAUN NANAS BERMATRIKS RESIN POLYESTER TERHADAP KEKUATAN BENDING DAN STRUKTUR MAKRO
No full textThe development of natural fiber-based composite materials is an
attractive alternative to replace synthetic materials due to its
lightweight, strong, and environmentally friendly properties. This
study aims to determine the effect of the combination of sugar palm
fiber and pineapple leaf fiber on the bending strength and
macrostructure of polyester resin matrix composites. The fibers used
were derived from natural waste, each cut to 150 mm in length and
combined with Yucalac 157 BQTN-EX polyester resin and MEKPO
catalyst. The specimen manufacturing process used the hand lay-up
press method, while the flexural strength testing was carried out
based on the ASTM D-790 standard. The macrostructure was
observed using a macro lens to see the fiber distribution, voids, and
delamination. This study used five variations of specimen
composition, namely: specimen 1 (40% palm fiber, 59% resin, 1%
catalyst), specimen 2 (40% pineapple fiber, 59% resin, 1% catalyst),
specimen 3 (20% palm fiber, 20% pineapple fiber, 59% resin, 1%
catalyst), specimen 4 (15% palm fiber, 25% pineapple fiber, 59%
resin, 1% catalyst), and specimen 5 (25% palm fiber, 15% pineapple
fiber, 59% resin, 1% catalyst). The results showed that variations in
fiber composition affected the flexural strength and macrostructure
of the specimens. The combination with pineapple fiber dominance
in specimen 5 produced the highest bending strength of 80 MPa,
while the specimen with sugar palm fiber dominance in specimen 3
only reached 59.4 MPa. The even fiber distribution, strong
interphase bonding, and minimal voids contributed significantly to
the improvement in mechanical performance. This study shows that
natural fibers have great potential in the manufacture of high-quality
composites
PEMBENTUKAN ADAB SOPAN SANTUN ANAK USIA DINI MELALUI METODE PEMBIASAAN DI TK AL ISHLAH BUNGKAL PONOROGO
No full textPoliteness and good manners are essential components in shaping the character of early childhood, as they reflect the child's personality in interacting with their surroundings. This study aims to describe the formation of polite manners in early childhood through the habituation method at Al Ishlah Bungkal Ponorogo Kindergarten. This research uses a descriptive qualitative approach with data collection techniques in the form of observation, interviews, and documentation. The research subjects consisted of teachers and group B students. Data analysis involved the stages of data collection, data reduction, data display, and conclusion drawing, with triangulation techniques used to ensure data validity.
The results of the study show that the habituation method works optimally in forming good manners in early childhood. The manners instilled included: greeting others, refraining from using harsh words, respecting elders, praying properly, asking permission, saying thank you, and receiving items with the right hand. The habituation process followed five steps: giving simple explanations, modeling good behavior, gently reminding when children forget, giving appreciation, and avoiding criticism when children make mistakes. In addition, it was found that short songs were used as a transition medium before collective prayers, helping children calm down and pray in an orderly manner. This indicates that habituation can be implemented through enjoyable and developmentally appropriate approaches for young children