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PENGARUH RASIO REAKTAN PADA IMPREGNASI DAN SUHU REDUKSI TERHADAP KARAKTER KATALIS KOBALT/ZEOLIT ALAM AKTIF Tri Kurnia Dewi; Mahdi; Teguh Novriyansyah
Jurnal Teknik Kimia Vol 22 No 3 (2016): Jurnal Teknik Kimia
Publisher : Chemical Engineering Department, Faculty of Engineering, Universitas Sriwijaya

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Abstract

Pada proses reaksi kimia seperti hidrogenasi, cracking maupun hydrocracking, dibutuhkan katalis perengkah yang merupakan katalis heterogen. Salah satu jenis katalis heterogen adalah katalis logam-pengemban, yang terdiri dari logam yang diembankan pada bahan pengemban padat seperti zeolit alam aktif. Pada penelitian ini, dilakukan pengembanan katalis logam kobalt ke dalam zeolit alam aktif melalui metode impregnasi. Variabel yang diteliti pada penelitian ini adalah rasio berat reaktan (Co dan zeolit alam aktif) pada impregnasi katalis dengan variasi 2:20; 3:20; 4:20; 5:20 dan 6:20 serta suhu reduksi dengan variasi 250oC; 300oC; 350oC; 400oC dan 450oC. Produk katalis Co/ZAA dianalisa tingkat keasamannya dengan cara adsorpsi amoniadan piridin. Luas permukaan katalis Co/ZAA dianalisa menggunakan Surface Area Analyzer dengan metode BET. Hasil penelitian menunjukkan bahwa semakin besar rasio berat reaktan kobalt/zeolit alam aktif maka semakin besar pula keasaman dan luas permukaan katalis yang terbentuk. Keasaman dan luas permukaan katalis Co/ZAA juga mengalami kenaikan seiring dengan kenaikan suhu reduksi. Keasaman katalis terbesar pada penelitian ini adalah pada rasio reaktan Co/ZAA 6:20 dan pada suhu reduksi 450 oC yaitu masing-masing 6,4615 mol/g dan 7,5202 mol/g (keasaman dengan adsorbat amonia), 2,6047 mol/g dan 3,6662 mol/g (keasaman dengan adsorbat piridin). Luas permukaan katalis terbesar pada penelitian ini adalah pada rasio berat reaktan Co/ZAA 6:20 yaitu 32,63 m2/g dan pada suhu reduksi 450 oC yaitu 38,95 m2/g.
Pengaruh Laju Pertumbuhan Penduduk, Dependency Ratio Dan Tingkat Pendidikan Terhadap Pertumbuhan Ekonomi di Kota Langsa Radesi Bariaty; Nurlaila Hanum; Miswar; Manovri Yeni; Mahdi
Jurnal Sociohumaniora Kodepena (JSK) Vol. 3 No. 2 (2022): Jurnal Sosiohumaniora Kodepena
Publisher : Kodepena Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54423/jsk.v3i2.112

Abstract

This study aims to determine the effect of population growth rate, dependency ratio and education level on economic growth in Langsa City in 2006-2021. The method of data collection in this research is done through a literature study, the data analysis method used is quantitative analysis using multiple linear regression analysis using the E-Views version 10. The results obtained by the equation Y = – 11.85942 – 0.322561 X1 + 0.284660 X2 + 0.195014 X3, based on the t-test the population growth rate has a negative and insignificant effect, the dependency ratio has a positive and significant effect and the level of education has a positive and insignificant effect on economic growth in Langsa City. Simultaneously the rate of population growth, dependency ratio and level of education have no significant effect on economic growth in Langsa City.
Analisis Alokasi Dana Desa (ADD) dan Kebijakan Desa Terhadap Tingkat Kesejahteraan Masyarakat Di Desa Narigunung Sembiring, Febrio Kadanta; Yani Rizal; Iskandar; Radhiana; Mahdi; Zahrul Fuadi; Anwar, Anwar; Cut Nya Dhin
Jurnal Sociohumaniora Kodepena (JSK) Vol. 4 No. 1 (2023): Jurnal Sosiohumaniora Kodepena
Publisher : Kodepena Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54423/jsk.v4i1.130

Abstract

This study aims to determine the effect of village fund allocation and village policy on the level of community welfare in Narigunung Village 1. The method used is a quantitative method using the help of Eviews 12. The population in this study was 549 people in Narigunung 1 Village, and the sample in this study amounted to 80 respondents with Non-probability sampling techniques using purposive sampling. Data collection methods by distributing questionnaires and by using validity tests and reliability tests. The data analysis methods used in this study are multiple linear regression analysis, t test, F test, and determination coefficient test. Based on the results of multiple linear regression analysis, the equation Y = 3.422786 + 0.763682X 1 + 0.141002X 2 is obtained, meaning that the constant is 3.422786 which means if X 1 (village fund allocation) and X 2 (village policy) value is 0, then Y (community welfare) value is 3.422786, while X 1 (village fund allocation) with a result of 0.763682 which means that every increase X 1 1% will increase Y by 0.763682% assuming the other variables are constant, and vice versa. and X 2 (village policy) by 0.141002 which means that every increase in X 2 by 1% will increase Y by 0.141002% assuming the other variables are constant, and vice versa. The results of the t (partial) test for X 1 (village fund allocation) obtained a t sig value of 0.0000 < 0.05 which means a positive and significant effect on Y (community welfare) while for X 2 (village policy) a t sig value of 0.0286 < 0.05 was obtained which means a positive and significant effect on Y (community welfare). The results of the F (simultaneous) test are known to have an Fsig value of 0.000000 < 0.05 which means that X 1 (village fund allocation) and X2 (village policy) simultaneously have a significant effect on Y (community welfare). The result of the coefficient of determination obtained R2 (R Square) of 0.731678 or (73.17%), while the remaining 26.83% was influenced or explained by other variables that were not included in this research model
Integration of Cognitive, Affective, and Psychomotor Domain Scoring in Islamic Religious Education Pranajaya, Syatria Adymas; Idris, Jamaluddin; Abidin, Zainal; Mahdi
Sinergi International Journal of Education Vol. 1 No. 2 (2023): August 2023
Publisher : Yayasan Sinergi Kawula Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61194/education.v1i2.106

Abstract

An educator must consider the levels in each domain (cognitive, affective and psychomotor) when compiling scores and weighting questions. This is also the case in Islamic Religious Education lessons. The purpose of writing this article is to explain the integration of scoring for cognitive, affective, and psychomotor domains along with examples in Islamic religious education questions. Using literature studies, there are conclusions obtained from this article, namely the benefits for students, 1). Helps students to develop balanced competencies. 2). Helps students to understand the relationship between knowledge, attitudes, and skills. 3). Helps students to become a whole person with integrity. So it is highly recommended for educators to be able to carry out the right application, with the integration of cognitive, affective, and psychomotor domain scoring in order to become one of the important instruments to improve the quality of Islamic religious education in the world of education.
APPLICATION OF ARTIFICIAL NEURAL NETWORKS ON USER AND PASSWORD AUTHENTICATION USING THE AUTOASSOCIATIVE MEMORY METHOD Syahputra, Guntur; Indrawati; Amri; Mahdi; Muhammad Riska
INFOKUM Vol. 10 No. 4 (2022): October, computer, information and engineering
Publisher : Sean Institute

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Abstract

Autoassociative Memory (AM) is one of the artificial neural network methods and is a special of Heteroassociative Memory network. AM saving one or more vectors using matrics by the training process. Vectors that have been stored can be recognized by computing the weight matrix and in the activation process this method can be done very easily because it does not require calculation of the target value like other artificial neural network methods. The target is identical to the input so that if the input is identical to the output then the input is a pattern is a recognized object. AM ability to recognize patterns can be used for User and Password Authentication in an information system, so as to increase security in applications. The application of AM on a website-based application can reduce direct interaction between the database on the system and users who are not authorized, because the authentication process only involves a weight matrix. To apply the AM method, combine user and password then converted into binary to making a vector to using AM processed. In this research, AM ability to recognize user and password is 88% with a total of 100 data and is able to recognize users and passwords by 60% with an entropy value of 0.29, it can be concluded that the AM method can be used in the authentication process but has not optimal because it has not correct 100%.
Anggapan Pestisida Sebagai Obat Bagi Petani Bawang Merah Di Kabupaten Solok Dan Konsekwensinya Pada Lingkungan Yane Oktavia; Afrizal; Mahdi
Jurnal Niara Vol. 17 No. 1 (2024): Mei
Publisher : FAKULTAS ILMU ADMINISTRASI UNIVERSITAS LANCANG KUNING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/niara.v17i1.20614

Abstract

Increasing shallot production in Lembah Gumanti District, Solok Regency, is very dependent on the use of pesticides. Farmers seem to view pesticides as plant healing medicines rather than dangerous poisons. This research aims to determine farmers' perceptions about pesticides, and farmers' behavior in using pesticides and their influence on public health risks. The research was conducted in Nagari Sungai Nanam, Lembah Gumanti District, Solok Regency. The research uses descriptive qualitative research methods combined with a quantitative approach. Data collection techniques using questionnaires and interviews with a sample of 98 shallot farmers were selected using simple random sampling. The research results show that the majority of farmers have a positive perception of pesticides, viewing them as poisons that are dangerous but beneficial if used according to the rules. Most farmers have positive behavior in terms of knowledge, attitudes and actions, such as choosing the type of pesticide, spraying time, paying attention to the weather, using personal protective equipment and disposing of pesticide packaging. Negative behaviors such as excessive dosage and high spraying frequency are still found. Farmers' positive behavior has a good impact on the environment, especially reducing the risk of poisoning. The impacts of pesticide use such as dizziness/nausea/skin irritation were never felt by respondents who used complete PPE (52%), and some always experienced these impacts (4%). The use of pesticides according to regulations has never had an impact on respondents (53%). The use of pesticides has quite an impact on health risks and the sustainability of environmentally friendly agriculture
Dampak Kebijakan Paten Terhadap Kualitas Pelayanan Publik (Studi Implementasi Paten Di Kabupaten Lima Puluh Kota) Yossarika; Afrizal; Mahdi
Jurnal Niara Vol. 17 No. 1 (2024): Mei
Publisher : FAKULTAS ILMU ADMINISTRASI UNIVERSITAS LANCANG KUNING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/niara.v17i1.20615

Abstract

Rural development is an effort to improve the quality of life and welfare of the rural communities. Public services provided by local governments are important for regional development. Improvement of public services in the regions can be carried out by the District Government through the District Integrated Administration Services (PATEN) in accordance with the Minister of Home Affairs Regulation Number 4 of 2010. One of licensing that is held through PATEN in the District of Lima Puluh Kota is the Micro and Small Business License. This research combines qualitative and quantitative methods. The research was conducted in Kapur IX and Luak Districts. Data was collected through structured interviews, secondary data, and questionnaries. Data analysis was carried out through the case study technique of Robert K. Yin and Importance Performance Analysis. The results showed that the implementation of PATEN had a good impact on public services and the satisfaction of service seekers reached 96,25%.
Pengaruh Kredit Usaha Tani Dalam Pembangunan Pedesaan Studi Kasus Pada Kredit Program Pengembangan Usaha Agribisnis Pedesaan (PUAP) Zuhelmi; Rudi Febriamansyah; Mahdi
Jurnal Niara Vol. 17 No. 3 (2025): Januari
Publisher : FAKULTAS ILMU ADMINISTRASI UNIVERSITAS LANCANG KUNING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/niara.v17i3.25488

Abstract

Salah satu program pemerintah dalam pembangunan masyarakat petani di pedesaan adalah Program Pengembangan Usaha Agribisnis Pedesaan (PUAP). Program ini dilaksanakan oleh pemerintah terutama terkait dengan masih rendahnya sumbangan pendapatan yang dapat diberikan oleh usaha pertanian untuk kesejahteraan petani. Salah satu kendalanya adalah permodalan usahatani di pedesaan itu sendiri. Dalam program PUAP tersebut, pemerintah telah menyalurkan modal usahatani dengan melibatkan satu lembaga di pedesaan yaitu Lembaga Keuangan Mikro Agribisnis (LKMA). Sejumlah hasil penelitian masih meragukan keberhasilan program PUAP tersebut, dalam upaya meningkatkan usaha pertanian di pedesaan. Untuk itu, Penelitian ini dilakukan dengan tujuan untuk mengetahui bagaimana proses pemberian kredit PUAP yang dilaksanakan oleh Lembaga Keuangan Mikro Agribisnis (LKMA) dan menganalisa pengaruh pemberian kredit dari program PUAP tersebut terhadap pendapatan usahatani padi pada satu kasus di Gapoktan Karya Sejahtera yang digulirkan pada tahun 2010. Penelitian ini merupakan penelitian deskriptif kuantitatif. Populasi dari penelitian ini adalah seluruh anggota kelompoktani yang bergabung di Gapoktan Karya Sejahtera yang memiliki usahatani padi sawah di nagari Koto Baru kecamatan Luhak Nan Duo, sedangkan yang menjadi sampel penelitian adalah anggota Gapoktan yang dipilih secara acak sederhana dari populasi penelitian yaitu sebanyak 21 petani peminjam dan 28 petani tidak meminjam kredit. Metode pengumpulan data dilakukan dengan mengajukan kuesioner, wawancara mendalam dengan informan kunci dan observasi langsung dilapangan. Hasil penelitian menunjukkan bahwa pelaksanaan Program PUAP oleh LKMA Karya Sejahtera sudah sangat baik diukur menurut indikator penilaian kinerja. Hasil uji statistik menunjukkan bahwa terjadi peningkatan pendapatan pada petani yang memanfaatkan dana pinjaman Program PUAP dibanding dengan petani yang tidak memanfaatkan dana pinjaman dari PUAP. LKMA telah bekerja cukup baik dalam menyukseskan Program PUAP terutama dalam mendorong peningkatan usahatani padi didaerah studi
Business Sustainability Analysis of the Social Forestry Program in West Sumatra Province Rachmina, Dwi; Herawati; Feryanto; Mahdi; Wibowo, Rulianda Purnomo; Azriani, Zednita
AGRARIS: Journal of Agribusiness and Rural Development Research Vol. 10 No. 2: July-December 2024
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/agraris.v10i2.550

Abstract

The global community recognizes social forestry as a way to improve community welfare through sustainable forest programs. In Indonesia, this program aims to involve local communities in forest management, providing multiple benefits such as forest preservation, improved livelihoods, and poverty reduction. This study aims to analyze the sustainability of a social forestry program for both Community Forest (CF) and non-Community Forest (non-CF) schemes (Village Forests and Community Plantation Forests). The research was conducted in Sijunjung, Solok, Padang Pariaman Regencies, and Padang City, involving a sample of 33 CF participants and 65 non-CF participants selected through snowball sampling. The data were collected through direct interviews and focus group discussions (FGDs) at provincial and regency levels. The business sustainability assessment utilized multidimensional indicators (MDS) across three dimensions: economic, social, and institutional and analyzed using Rap_MForest. The findings revealed that social forestry program had a moderate level of sustainability in all dimensions; however, the social dimension showed lower sustainability, owing to limited community participation and ineffective empowerment of non-group members. The sustainability index of CF scheme was higher than the non-CF (VF and CPF). The CF model emerged as the more adaptable and comprehensive approach, promoting both environmental conservation and socioeconomic development. Therefore, prioritizing the institutional strengthening of VF and CPF became crucial. In addition, enhancing the active role and involvement of group members in the social forestry program within the social dimension was also essential. To enhance sustainability, efforts should be focused on strengthening mentoring and counseling programs for social forestry groups involved in state forest and community plantation initiatives.
ANALISIS PENGARUH BUDAYA KERJA, LINGKUNGAN KERJA, DAN KESEJAHTERAN KARYAWAN TERHADAP PRODUKTIVITAS KERJA KARYAWAN DI PT. ELANG PERDANA TYRE INDUSTRY KABUPATEN BOGOR Mahdi; Khaidarmansyah
Musytari : Jurnal Manajemen, Akuntansi, dan Ekonomi Vol. 14 No. 13 (2025): Musytari : Jurnal Manajemen, Akuntansi, dan Ekonomi
Publisher : Cahaya Ilmu Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.8734/musytari.v14i13.10977

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh budaya kerja, lingkungan kerja, dan kesejahteraan karyawan terhadap produktivitas kerja karyawan di PT. Elangperdana Tyre Industry, Kabupaten Bogor. Metodologi penelitian yang digunakan adalah kuantitatif dengan pendekatan survei. Data dikumpulkan melalui kuesioner yang disebarkan kepada 100 karyawan dari berbagai departemen di perusahaan tersebut. Hasil analisis regresi menunjukkan bahwa budaya kerja memiliki pengaruh positif dan signifikan terhadap produktivitas kerja karyawan. Lingkungan kerja juga ditemukan berpengaruh positif, namun pengaruhnya tidak signifikan secara statistik. Sebaliknya, kesejahteraan karyawan memiliki pengaruh negatif dan signifikan terhadap produktivitas kerja. Temuan ini menunjukkan pentingnya perusahaan untuk memperkuat budaya kerja yang positif dan memperhatikan kesejahteraan karyawan guna meningkatkan produktivitas kerja. Rekomendasi bagi manajemen PT. Elangperdana Tyre Industry termasuk pengembangan program-program peningkatan kesejahteraan karyawan serta perbaikan lingkungan kerja untuk mendukung kinerja karyawan yang optimal.