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KARAKTERISASI EDIBLE FILM DARI PEKTIN ALBEDO JERUK BALI DAN PATI GARUT [IN PRESS SEPTEMBER 2015] Syarifuddin, Ahmad; Yunianta, Yunianta
Jurnal Pangan dan Agroindustri Vol 3, No 4 (2015)
Publisher : Jurusan Teknologi Hasil Pertanian, Fakultas Teknologi Pertanian, Universitas Brawijaya

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Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi pektin albedo jeruk bali dan gliserol terhadap karakteristik dan perlakuan terbaik edible film yang dihasilkan. Metode penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan dua faktor. Faktor I adalah konsentrasi pektin (10%, 20%, dan 30% b/bpati) dan faktor II adalah konsentrasi gliserol (0.50%, 0.75%, dan 1% v/v). Berdasarkan hasil penelitian dapat disimpulkan bahwa peningkatan konsentrasi pektin dan gliserol berpengaruh nyata (Î±=0.05) terhadap semua parameter yang diuji (kadar air, ketebalan, kecerahan (L*), kelarutan, transmisi uap air, kuat tarik dan perpanjangan) edible film. Edible film terbaik diperoleh dari pati garut 2% (b/v), pektin 30% (b/bpati), CaClâ 1.6% (b/bpektin) dan gliserol 0.50% (v/v). Karakteristik edible film terbaik yaitu kadar air 10.89%, tebal 0.19 mm, kecerahan (L*) 81.67, kelarutan 51.92%, transmisi uap air 1.38 g/mÂ².jam, kuat tarik 4.46 N/cmÂ² dan perpanjangan film 36.89%. Â Kata Kunci: Albedo, Edible Film, Gliserol, Pektin

PERFORMA DAN EMISI GAS BUANG MESIN BENSIN DENGAN SISTEM EGR PANAS PADA CAMPURAN BAHAN BAKAR PREMIUM DAN HIGH PURITY Syarifuddin, Ahmad; Utomo, MSK Tony Suryo; Syaiful, Syaiful
MEKTRIK Vol 7, No 1 (2016): Jurnal MEKANIKAL Volume 7 Nomor 1 Januari 2016
Publisher : MEKTRIK

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Abstrak: Performa dan emisi gas buang mesin bensin system EGR panas pada campuran bahan bakar premium dan high purity methanol. Meningkatnya jumlah kendaraan bermotor di Indonesia menyebabkanÂ meningkatnya konsumsi bahan bakar minyak dan polusi udara. Konsumsi bahan bakar minyak meningkat mengakibatkan cadangan bahan bakar fosil menipis. Methanol merupakan salah satu bahan bakar alternatif yang diharapkan dapat menggantikan bahan bakar fosil, karena dapat diperbarui dan ramah lingkungan. Eksperimen ini bertujuan untuk mengetahui pengaruh penggunaan bahan bakar campuran premium dan hight purity methanol (HPM) dengan sistem EGR(Exhaust Gas Recirculation) panas terhadap performa dan emisi gas buang pada mesin bensin, 4 silinder, 16 katup, sistem EFI dilengkapi dengan sistem EGR panas. Sebuah dynamometer merek DYNO-mite Land&Sea untuk mengukur daya mesin dan sebuah gas analyser Stargass untuk mengukur emisi gas buang. Pada saat pengambilan data menggunakan persentase campuran bahan bakar premium-methanol yaitu 0, 5 10 dan 15% atau M0/Premium murni, M5, M10 dan M15. Eksperimen dilakukan pada variasi putaran mesin 2500 rpm, 3000Â rpm, 3500 rpm dan 4000 rpm, beban ditetapkan 25% dan bukaan katup EGR atau Opening of EGR Valve(OEV) 0% dan 7%. Analisa data dengan membandingkan antara tanpa EGR dan dengan EGR serta antara bahan bakar campuran methanol dengan premium murni. Hasil penelitian menunjukkan bahwa dengan pemakaian bahan bakar campuran premium-methanol dan diaplikasikan dengan EGR, mengakibatkan kenaikan nilai torsi, daya dan efisiensi termal. Brake specific fuel consumption(BSFC), dengan bahan bakar campuran premium-methanol meningkat, sedangkan dengan EGR mengalami penurunan. Penerapan EGR menyebabkan temperatur gas buang turun yang berarti mengindikasikan emisi NOX turun. Sedangkan penurunan emisi gas buang terjadi pada CO rata-rata sebesar 42.6% dan HC turun rata-rata 10.6%, sementara CO2 mengalami peningkatan rata-rata sebesar 22.62%.

PERFORMA DAN EMISI GAS BUANG MESIN BENSIN DENGAN SISTEM EGR PANAS PADA CAMPURAN BAHAN BAKAR PREMIUM DAN HIGH PURITY METHANOL Syarifuddin, Ahmad; Utomo, MSK Tony Suryo; Syaiful, Syaiful
Jurnal MEKANIKAL Vol 7, No 1 (2016): Jurnal MEKANIKAL Volume 7 Nomor 1 Januari 2016
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.474 KB)

Abstrak: Performa dan emisi gas buang mesin bensin system EGR panas pada campuran bahan bakar premium dan high purity methanol. Meningkatnya jumlah kendaraan bermotor di Indonesia menyebabkanÂ meningkatnya konsumsi bahan bakar minyak dan polusi udara. Konsumsi bahan bakar minyak meningkat mengakibatkan cadangan bahan bakar fosil menipis. Methanol merupakan salah satu bahan bakar alternatif yang diharapkan dapat menggantikan bahan bakar fosil, karena dapat diperbarui dan ramah lingkungan. Eksperimen ini bertujuan untuk mengetahui pengaruh penggunaan bahan bakar campuran premium dan hight purity methanol (HPM) dengan sistem EGR(Exhaust Gas Recirculation) panas terhadap performa dan emisi gas buang pada mesin bensin, 4 silinder, 16 katup, sistem EFI dilengkapi dengan sistem EGR panas. Sebuah dynamometer merek DYNO-mite Land&Sea untuk mengukur daya mesin dan sebuah gas analyser Stargass untuk mengukur emisi gas buang. Pada saat pengambilan data menggunakan persentase campuran bahan bakar premium-methanol yaitu 0, 5 10 dan 15% atau M0/Premium murni, M5, M10 dan M15. Eksperimen dilakukan pada variasi putaran mesin 2500 rpm, 3000Â rpm, 3500 rpm dan 4000 rpm, beban ditetapkan 25% dan bukaan katup EGR atau Opening of EGR Valve(OEV) 0% dan 7%. Analisa data dengan membandingkan antara tanpa EGR dan dengan EGR serta antara bahan bakar campuran methanol dengan premium murni. Hasil penelitian menunjukkan bahwa dengan pemakaian bahan bakar campuran premium-methanol dan diaplikasikan dengan EGR, mengakibatkan kenaikan nilai torsi, daya dan efisiensi termal. Brake specific fuel consumption(BSFC), dengan bahan bakar campuran premium-methanol meningkat, sedangkan dengan EGR mengalami penurunan. Penerapan EGR menyebabkan temperatur gas buang turun yang berarti mengindikasikan emisi NOX turun. Sedangkan penurunan emisi gas buang terjadi pada CO rata-rata sebesar 42.6% dan HC turun rata-rata 10.6%, sementara CO2 mengalami peningkatan rata-rata sebesar 22.62%.Kata Kunci: EGR, emisi, HPM, performa

EXISTENCE OF INTENTION AND CLASSIFICATION OF SPIRITUAL QUALITY OF STUDENTS AT THE BOARDING SCHOOL JAGAD ALIMUSSIRRY SURABAYA Aini, Siti Nur; Syarifuddin, Ahmad
Journal Intellectual Sufism Research (JISR) Vol 1 No 1 (2018): Journal Intelectual Sufism Research (JISR)
Publisher : http://jagadalimussirry.com/

Scientific writing aims to find out the intentions and sincerity correctly, efforts must be made to improve the spiritual quality of students. This research is a qualitative analysis research with case study method. Data collection techniques used are observation, interviews, and documentation. Data sources came from the Jagad Alimussirry Student Boarding School. The results of the analysis show that something done with intention and sincerity only gives to God so that it becomes a perfect charity from one's worship. Before charity must be careful so that the charity that is done can be accepted by God. People who purify the heart of all defilements by avoiding evil, maintain honesty in words and deeds, their hearts will become clean, can emit positive energy and can meet Allah SWT.

Pengembangan Modul Berbasis Kearifan Lokal Sumatera Selatan Pembelajaran Tematik Subtema Pekerjaan Orang Tuaku Herlina, Meilisyah; Faisal; Tastin, Tastin; Syarifuddin, Ahmad
IBTIDA' Vol. 4 No. 02 (2023): IBTIDA' NOVEMBER 2023
Publisher : FAKULTAS AGAMA ISLAM UNIVERSITAS BILLFATH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37850/ibtida'.v4i02.567

This research aims to find out the process of developing modules based on local wisdom and producing modules based on local wisdom on valid material for theme 4, various jobs, subtheme 3, my parents' jobs, class IV, SD Negeri 09 Kisam Tinggi, South OKU Regency. This type of research is research (R&D) with a model developed by Borg and Gall, with the ADDIE approach method. This research data collection technique uses questionnaires and observation. The results of this research are: the results of the research process in development using processes namely product creation, product validation, revision, and field trials, the validity level of module development is 87%, validation from language experts is 82% and validation from material experts is 82%, thus development is included in the valid category, the level of validity of learning media is 87%, thus development is included in the valid category.

Pengaruh Nilai Tukar, Inflasi, Suku Bunga Bi Dan Dow Jones Index Terhadap Indeks Harga Saham Gabungan Di Bursa Efek Indonesia Periode 2018-2022 Syarifuddin, Ahmad; Yusroni, Nanang
JAKA (Jurnal Akuntansi, Keuangan, dan Auditing) Vol. 5 No. 1 (2024): JAKA (Jurnal Akuntansi, Keuangan, dan Auditing)
Publisher : Universitas Dian Nuswantoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56696/jaka.v5i1.10879

The development of financial asset investment in the capital market is growing quite rapidly, starting from the ease of making sales and purchases but also the low capital required to start investing in the capital market. However, in the capital market, especially the stock exchange, it is an investment instrument that has a high risk and high return, so investors must be selective in determining which share issuer to buy by considering factors that can influence share prices on the Indonesian Stock Exchange. Some of them include exchange rates, inflation, BI interest rates and the Dow Jones index. Therefore, this research was carried out to analyze the influence of exchange rates, inflation, BI interest rates and the Dow Jones index on the composite stock price index in 2018-2022 with the data used being a monthly time series with a sample size of 60 months. This research uses a quantitative approach with the analytical techniques used in this research, namely descriptive statistical analysis, classical assumption tests and multiple linear regression tests which were processed using the E-Views version 12 program. With results showing that the exchange rate has a significant negative effect on the stock price index combined, then for inflation, BI interest rates and the Dow Jones index there is a partially significant positive influence on the composite stock price index on the Indonesia Stock Exchange.

Peningkatan Kualitas Kinerja Guru Ditinjau Dari Manajemen Kepala Sekolah (Studi Kasus Pada SMK Multazam Gisting) Syarifuddin, Ahmad
Jurnal Ilmu Tarbiyah Vol 3 No 1 (2024): Jurnal Ilmu Tarbiyah
Publisher : STIT TANGGAMUS

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Abstrak Tercapainya tujuan pada suatu Lembaga Pendidikan dalam hal ini yaitu sekolah, akan sangat dipengaruhi oleh cara guru dalam melakukan tugasnya. Tujuan tersebut akan tercapai apabila gaya kepemimpinan kepala sekolah berpengaruh terhadap kinerja para guru. Hasil penelitian menunjukkan bahwa ketika kepala sekolah memiliki pendekatannya sendiri untuk meningkatkan hubungan guru dan siswa dalam proses pembelajaran, maka keterlibatannya dalam mengelola peningkatan interaksi tersebut telah berjalan dengan baik. Kepala sekolah telah berhasil dalam meningkatkan lingkungan belajar di SMK Multazam Gisting dengan menjadikan lingkungan sekolah aman, nyaman, dan kondusif. Pengembangan media pembelajaran belum dimanfaatkan dengan baik untuk meningkatkan taraf pendidikan. Hal ini karena kurangnya infrastruktur dan fasilitas yang belum memadai. Sementara itu, kepala SMK Multazam Gisting sudah berhasil dalam meningkatkan kinerja guru. Kepala sekolah melakukan evaluasi kepada para guru berdasarkan kompetensi pedagogik, kepribadian, dan profesionalnya.

Pengaruh Metode Eksperimen Terhadap Minat Belajar Siswa Sekolah Dasar Palembang Syarifuddin, Ahmad; Ramadhini, Senja Ayu; Faisal, Faisal; Nurlaeli, Nurlaeli
BASICA Journal of Arts and Science in Primary Education Vol 3 No 2 (2023)
Publisher : Program Studi Pendidikan Guru Madrasah Ibtidaiyah INSURI Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37680/basica.v3i2.4117

This study aims to determine students' learning interests applied to experimental methods and students' learning interests that are not applied experimental methods and find out the influence of experimentation methods on students' learning interests. This type of research is quantitative quasi-experiment. Data collection techniques with questionnaires, observations, and documentation. The data analysis technique used is simple linear regression. This study uses validity tests, reliability tests and hypothesis tests. Research Results (1) the learning interest of control class students is quite good judging from the indicators of student interest in learning. Students feel happy, students pay attention to the explanation of the material, students are interested in discussing, students are involved in discussions by responding to the opinions of their friends, even though not all students are interested in it either. 2) the learning interest of the experimental class students is very good, as can be seen from the indicators of interest in learning, students feel happy, enthusiastic about the experiments carried out, all students are involved when the experiment, when presented the results of the experiment, all students pay attention and give opinions to the presenting group. (3) experimental methods have a significant effect on students' interest in learning. Judging from the regression equation, there is an influence of the application of the experimentation method on students' interest in learning on theme 5 subtheme 1 in grade IV SD Muhammadiyah 14 Palembang from its significance value of 0.000 < 0.05

Creativity of Driving Teachers in Developing Learning Interests of Class V Elementary School Students Nurlaeli; Febriani, Tiara; Syarifuddin, Ahmad; Hamzah, Amir; Tastin
MIMBAR PGSD Undiksha Vol. 11 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjpgsd.v11i2.61615

The curriculum in Indonesia has changed according to the times. The government offers the concept of the Merdeka Learning Merdeka Curriculum, intending to adjust to the talents and interests of students. The government held a driving teacher training program requiring teachers to be more creative in learning. This study aims to analyze teachers' characteristics, student interests in learning, and the influence of the creativity of driving teachers in developing students' learning interests. This type of research is quasi-experimental quantitative. The population in this study were all fifth-grade elementary school students consisting of 63 students. Data collection techniques with questionnaires, interviews and documentation. The data analysis technique used is simple linear regression. Research using validity tests, reliability tests, and hypothesis testing. The research results from the driving teacher's creativity by doing ice breaking. Change the classroom atmosphere, use various media and methods, and create various learning materials and media. Students' interest in learning is in the form of liking doing assignments, being enthusiastic about learning, enjoying working with teams, liking practical learning activities, being active and online to give opinions in class. The creativity of the driving teacher influences in developing students' learning interests. It was concluded that the driving teacher's creativity significantly affected the developing students' learning interests. And create various learning materials and media. Students' interest in learning is in the form of liking doing assignments, being enthusiastic about learning, enjoying working with teams, liking practical learning activities, being active and online to give opinions in class. The creativity of the driving teacher influences in developing students' learning interests. It was concluded that the driving teacher's creativity significantly affected the developing students' learning interests. And create various learning materials and media. Students' interest in learning is in the form of liking doing assignments, being enthusiastic about learning, enjoying working with teams, liking practical learning activities, being active and online to give opinions in class. The creativity of the driving teacher influences in developing students' learning interests.

Layanan Home Visit Pada Era New Normal di Sekolah Dasar Rustariani, Erli; Tastin, Tastin; Syarifuddin, Ahmad
Limas PGMI Vol 4 No 2 (2023): Limas Pendidikan Guru Madrasah Ibtidaiyah
Publisher : Universitas Islam Negeri Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/limas_pgmi.v4i2.21254

The objectives of this research are: 1) Describe the planning of home visit services in the new normal era in elementary schools, 2) Describe the implementation of home visits in the new normal era in elementary schools, 3) describe the evaluation of home visit services in the new normal era in elementary schools. This research uses qualitative research methods with phenomological research type. The data collection techniques used were interviews, observation and documentation. The data analysis technique uses source, method and time triangulation techniques. The results of this research show that 1) the learning process used by West Kikim 3 Elementary School in the new normal era uses a home visit service. 2) The planning stage for home visit services in elementary schools includes planning where at this stage the teacher divides groups based on the nearest place of residence, makes a visit schedule, contacts the students' parents to inform them that the home visit service will be implemented and creates a WhatsApp group. 3) Implementation Stage, namely the teacher visits the study group home according to a predetermined schedule. 4) The evaluation stage, seen from the process, can be seen through the attitude and enthusiasm of the students and seen from the results, it can be assessed whether the home visit service has an effect on the students or not. 5) The obstacles experienced during the learning process using the home visit service were that there were several parents of students who suddenly changed the meeting schedule, limited teaching aids and vehicle access to the students' homes.

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