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All Journal Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan JDE (Journal of Developing Economies) Ikonomika : Jurnal Ekonomi dan Bisnis Islam Journal of Electrical Technology UMY Insight: Jurnal Bimbingan dan Konseling Jurnal Ekonomi Pembangunan CRJIM (Clinical and Research Journal in Internal Medicine)
Rifa'i, Achmad
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Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Health Professions Immunology & microbiology Library & Information Science Medicine & Pharmacology Nursing Public Health Other

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Determinants of Demand for Higher Education in Indonesia: Evidence from Indonesia Family Life Survey Rifa'i, Achmad; Irwandi, Irwandi; Mendy, David
Jurnal Ekonomi Pembangunan: Kajian Masalah Ekonomi dan Pembangunan Vol 20, No 1 (2019): JEP 2019
Publisher : Muhammadiyah University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jep.v20i1.6701

Abstract

The most outstanding event in recent history has been the continuous increase in the proportion of students entering higher education. Thus, it seems reasonable to assume to what extent this significant increase in higher education participation has a connection to the individual characteristics, social-economic, religion, gender ethnicity geography variables. Using data from the IFLS, a binomial logit model was fitted to determine the factors that influence an individual to pursue a higher-level education as observed by the recent rise in the demand for higher education in Indonesia. The empirical findings of the study indicate the following: firstly, individual characteristic; score, school type are relevant variables for individual participation in higher education. Secondly, for the socioeconomic variables; income, father?s education, mother?s education, household status, household size are important variables for individual participation in higher education. Finally, for the gender, ethnicity variables; the results were quite shocking, both Javanese and Male are the less likely to demand higher education in Indonesia. Further, regional and geographic variables were found to be insignificant.  
Differences in Nutritional Status and Quality of Life in Hemodialysis Patients Compared to CAPD Kosasih, Angelia; Samsu, Nur; Rifa'i, Achmad
Clinical and Research Journal in Internal Medicine Vol. 5 No. 1 (2024): Volume 5 No 1, May 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.crjim.2024.005.01.02

Abstract

Background: Patients with chronic kidney disease who undergo hemodialysis and CAPD (Continous Ambulatory Peritoneal Dialysis) modalities often experience disturbances in nutritional status and quality of life. The condition is affected by the chosen modalities and duration. Aim: This study assesses the differences in nutritional status and quality of life in individuals undergoing hemodialysis therapy with a duration of 4-hour, hemodialysis with a duration of 5-hour, and CAPD in order to determine the best modalities for patients with chronic kidney disease. Methods: Data were collected with cross-sectional from patients with chronic kidney disease at the hemodialysis polyclinic at RSUD dr. Saiful Anwar Malang, Panti Nirmala Hospital Malang, Wava Husada Kepanjen Hospital, and the CAPD polyclinic at RSUD dr. Saiful Anwar Malang. Classified into CAPD group, 4-hour hemodialysis group, and 5-hour hemodialysis group. Assessment with a questionnaire consisting of the patient’s baseline characteristics, subjective global assessment (SGA), and SF-36 are used to assess and analyze differences in nutritional status and quality of life of patients with chronic kidney disease against the selected dialysis modality. Results: The physical health of the 5-hour hemodialysis group showed significant results compared to the 4-hour hemodialysis and CAPD (p <0.05). Mental health in the 5-hour hemodialysis procedure showed significant results compared to the 4-hour hemodialysis and CAPD (p <0.05). The nutritional status of 5-hour of hemodialysis was better than 4-hour of hemodialysis and CAPD (p<0.05). Conclusion: Hemodialysis with a duration of 5-hour has a better nutritional status and quality of life compared to a duration of 4-hour or CAPD.
Validity and Reliability of the Fatigue Severity Scale in Patients with Chronic Kidney Disease on Dialysis in Indonesia Rifa'i, Achmad; Satiti, Ika; Sagala, Ida; Setiabudhi, Verina
Clinical and Research Journal in Internal Medicine Vol. 5 No. 2 (2024): Volume 5 No 2, November 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.crjim.2024.005.02.07

Abstract

Background: Fatigue is one of the common symptoms in patients with chronic medical conditions like kidney failure that require hemodialysis. It is also associated with bad quality of life. Therefore, it is crucial to evaluate it using tools like Fatigue Severity Scale (FSS). Aim: The purpose of this study was to evaluate the reliability and validity of the translated FSS. Methods: FSS was performed on 41 chronic kidney patients undergoing dialysis. The FSS used in the study was translated from English to Bahasa Indonesia by the team. The questionnaire was assessed for its reliability and validity using Cronbach’s Alpha (CA) and Pearson Validity Test, respectively. Reliability for each item was also evaluated using the corrected item-total correlation. The scale is reliable if its CA value >0.6 and valid if the r-value is higher than the expected r on Pearson's table. Results: The scale was perceived as reliable based on the CA values from both respondent groups: 0.968 for HD and 0.952 for the CAPD group. All nine items were also deemed reliable based on the corrected item-total correlation score. Based on both r and Sig values, the translated FSS was valid for all groups: r>0.433 for HD, r>0.444 for CAPD, and Sig value <0.05. Conclusion: The translated FSS is valid and reliable, hinting at its ability to be utilized in assessing fatigue in chronic kidney patients on dialysis
Strategi Coping Stress terhadap Perilaku Self Injury (Studi Fenomenologi pada siswa MAN 4 Bojonegoro) Rifa'i, Achmad; Srianturi, Yanuari; Afriliyanto, Agus
INSIGHT: Jurnal Bimbingan Konseling Vol. 13 No. 2 (2024): INSIGHT: Jurnal Bimbingan dan Konseling
Publisher : Program Studi Bimbingan dan Konseling, Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/INSIGHT.132.011

Abstract

Adapaun tujuan yang hendak dicapai dalam penelitian ini adalah (1) mengetahui faktor-faktor self-injury pada siswa MAN 4 Bojonegoro (2) Mengetahui upaya yang dilakukan untuk mengurangi sebuah perilaku self-injury dengan strategi coping stress pada siswa MAN 4 Bojonegoro. Penelitian ini adalah penelitian lapangan dengan menggunakan pendekatan kualitatif dan jenis penelitian fenomenologi terhadap siswa pelaku self-injury pada siswa MAN 4 Bojonegoro. Narasumber dalam penelitian ini adalah siswa yang memiliki perilaku self-injury dan memiliki upaya coping stress pada siswa MAN 4 Bojonegoro.. Teknik pengumpulan data yang digunakan yaitu melalui observasi, wawancara dan dokumentasi. Sumber data pada penelitian ini adalah sumber primer siswa berumur 16 Tahun bernama SN dan informan pendukung melibatkan orang terdekat dari narasumber, bernama NAM. Hasil penelitian menunjukan bahwa: (1) Faktor yang menjadikan narasumber melakukan perilaku self-injury adalah permasalahan percintaan, Faktor kedua berupa disharmonisasi keluarga SN. Disharmonisasi keluarga. (2) Upaya coping stress yang dilakukan adalah bercerita dengan seseorang. SN bercerita dengan NAM karena NAM menjadi tempat ternyaman bagi SN. Koping yang kedua dengan melampiaskan kepada boneka. SN sering memeluk dan memukul boneka untuk mengurangi stres yang dialami SN.
Peran Bank Pembiayaan Rakyat Syariah dalam Mengimplementasikan Keuangan Inklusif Melalui Pembiayaan UMKM Rifa'i, Achmad
IKONOMIKA Vol 2 No 2 (2017)
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/febi.v2i2.1639

Abstract

Pemberdayaan UMKM bisa menjadi salah satu jawaban untuk memeratakan tidak hanya pertumbuhan ekonomi tetapi juga pusat-pusat perputaran uang yang baru. Keuangan inklusif diusung untuk menjawab permasalah tersebut melalui pendalaman akses keuangan ke daerah-daerah terutama terhadap masyarakat menengah bawah. Bank Pembiayaan Rakyat Syariah selaku perpanjangan tangan lembaga keuangan formal berusaha untuk menjadi intermediatory institution dalam mengimplementasikan keuangan inklusif yang bertujuan untuk memeratakan akses keuangan di Indonesia. Penelitian ini bertujuan untuk melihat peran Bank Pembiayaan Rakyat Syariah melakukan tugasnya dalam pembiayaan UMKM sebagai upaya untuk mencapai keuangan inklusif. Adapun data yang digunakan adalah data sekunder. Metodologi penelitian yang digunakan adalah deskriptif dengan pendekatan kualitatif. Analisis data kualitatif yang digunakan menggunakan teknik analisis Open Coding, Axial Coding dan Selective Coding. Berdasarkan hasil penelitian menggunakan tiga indikator keuangan inklusif Bank Indonesia yaitu access, usage, dan quality menunjukkan bahwa Bank Pembiayaan Rakyat Syariah sejauh ini telah berhasil menjaga dan meningkatkan kapasitasnya dalam memberikan akses, menyalurkan pembiayaan, dan rasio keuangan. 
Structural Transformation and Poverty Eradication in East Java (A Panel Data Approach of 38 Counties) Rifa'i, Achmad; Listiono
Journal of Developing Economies Vol. 6 No. 1 (2021)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jde.v6i1.23080

Abstract

The characteristic of structural transformation is a decrease in the share of agriculture followed by an increase in the industry share in the economy. Sometimes, the share of services to the economy increases more rapidly than the share of the industry, called immature structural transformation. This study aims to analyze the structural transformation process in East Java and its impact on poverty alleviation. Panel data for 38 districts/cities used from the Statistics Indonesia (BPS) during the 2012-2015 period. The estimation results revealed empirically that the service sector has a significant impact on reducing poverty in East Java. This research argues that East Java has experienced immature structural transformation seen from the stagnation of the industry's share of the economy. It is supposed that the role of the industrial sector is not significant, while the service sector is better to reduce poverty. Keywords: Structural Transformation, Poverty, East Java, Panel Data JEL: B22, I32, L16
Economy-Wide Impact of Gas Cutoff Commitment in the European Union: A CGE Analysis Rifa'i, Achmad
Jurnal Ekonomi Pembangunan Vol 14 No 2 (2025): Volume 14 Nomor 2 Tahun 2025
Publisher : Fakultas Ekonomi dan Bisnis Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jep.v14i2.4119

Abstract

This paper aims to investigate the potential cessation of gas supply in the European Union (EU) amid Russian-Ukrainian war after the European Commission submitted a proposal to reduce gas supply to all EU member states. To identify economy-wide impact, we apply Computable General Equilibrium (CGE) approach and utilize Global Trade Analysis Project (GTAP) 10 database covering 141 regions and 65 sectors. Our empirical analysis reveals that the gas supply reduction policy will heavily affect EU macroeconomic indicators, including declines in GDP and welfare in all simulations. The trade balance position remains strong, which still recorded a surplus. Nevertheless, the competitiveness (ToT) and export-import performances in the gas sector are turning down. These findings contribute to the geopolitical phenomenon that these tensions caused only declining economic performance at regional and global levels. Therefore, we suggest that any forms of tension and potential political and economic policies that lead to slowing down the economy must be resolved.
Pulmonary Hypertension In Chronic Renal Failure Rifa'i, Achmad; Setiadi, Satya
Clinical and Research Journal in Internal Medicine Vol. 6 No. 2 (2025): Volume 6 No 2, November 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.crjim.2025.006.02.11

Abstract

Chronic kidney disease affects more than 10% of the global population, with prevalence of 14.8% in the USA and 10.8% in Asia. The disease has more prevalence in older age individuals, women, and those with diabetes and high blood pressure, who are also at a higher risk of developing heart disease. Pulmonary hypertension is condition that occurs when the pressure in the pulmonary artery rises more than 20 mm hg. The occurrence rate of the condition is approximately 35% to 38% among hemodialysis patients and 12% to 36% among external peritoneal dialysis patients. Research indicates that a majority of individuals with chronic kidney disease also experience pulmonary hypertension. This is particularly true for individuals undergoing dialysis. The exact etiology of pulmonary hypertension in these individuals especially in ESRD is unknown, but there are numerous factors that can lead to the development of this condition. The writer want to examine the connection between pulmonary hypertension and chronic renal failure, paying particular attention to the underlying pathological mechanisms.
Implementation of a LoRa-Based Electric Vehicle Energy Monitoring System in Internet-Limited Competition Areas Rifa'i, Achmad; Sulistiyowati, Indah; Ahfas, Akhmad; Ayuni, Shazana Dhiya
Journal of Electrical Technology UMY Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v9i2.30216

Abstract

The Kontes Mobil Hemat Energi (KMHE) and the Shell Eco-marathon (SEM) are competitions that encourage students to design and develop energy-efficient and environmentally friendly electric vehicles. However, the majority of current energy monitoring systems for electric vehicles are built on Internet of Things (IoT) designs that depend on a stable connection to the internet, which is frequently unavailable in situations such as race tracks. Obtaining real-time energy usage statistics during vehicle operation becomes challenging due to this constraint. This research aims to design and implement a LoRa (Long Range)-based electric vehicle energy monitoring system that operates independently of internet networks. The proposed system consists of transmitter and receiver units that monitor voltage, current, power, and electrical energy parameters using a Current Transformer (CT) sensor, a voltage divider circuit, an ADS1115 ADC module, and an ESP32 microcontroller as the main controller.  A LoRa RA-02 module operating at 433 MHz is used to wirelessly send data, which are then shown in real time at the receiving device. Experimental results show that the system is capable of transmitting data reliably up to a distance of approximately 500 meters under field conditions without internet connectivity. The voltage measurement exhibits an average error below 0.1%, while the current measurement error ranges up to 4.65% compared to reference instruments. During vehicle operation, the system is able to calculate electrical power and energy consistently during vehicle operation. These results demonstrate that the suggested LoRa-based monitoring system is appropriate for real-time electric car energy monitoring in competitive settings with spotty internet connectivity.
Optimization of Adaptive Fuzzy-PID Control for Energy Efficiency in an Electric Vehicle Regenerative Braking System Sulistiyowati, Indah; Muchyiddin, Moh Imam; Rifa'i, Achmad; Jamaaluddin, Jamaaluddin; Arwandhi, Muhammad Asrul
Journal of Electrical Technology UMY Vol. 10 No. 1 (2026): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v10i1.31561

Abstract

The design and modeling of a Regenerative Braking System (RBS) based on adaptive Fuzzy-PID control in electric vehicles is covered in this work, along with a comparison with a traditional RBS. The performance of regenerative braking in electric vehicles still faces challenges in maximizing energy conversion efficiency during braking and maintaining system stability amid dynamic changes in operating conditions. The system was developed and simulated using MATLAB/Simulink to analyze dynamic performance under various operating conditions. The proposed system aims to improve energy efficiency by converting kinetic energy during the braking process into electrical energy, which is then stored in the battery. The Fuzzy-PID controller is designed to adjust PID parameters based on system conditions adaptively. Simulations were conducted for 20 seconds under scenarios that varied acceleration and deceleration conditions. System performance evaluation was based on State of Charge (SoC), battery voltage, and battery current parameters to assess energy conversion effectiveness and system stability. The simulation results show that the Fuzzy-PID system performs better than the conventional RBS system, as indicated by an increase in the State of Charge (SoC) value of approximately 0.005%. Additionally, the Fuzzy-PID system demonstrates voltage and current responses during regenerative braking that yield higher voltage and greater regenerative current than the conventional system. The results of this study indicate that the Fuzzy-PID method is an effective approach for improving energy efficiency and system stability in regenerative braking systems for electric vehicles.
Co-Authors Achmad Noerkhaerin Putra Agus Afriliyanto Ahmad Ahfas Arwandhi, Muhammad Asrul Indah Sulistiyowati Jamaaluddin Kosasih, Angelia Listiono Mendy, David Muchyiddin, Moh Imam Nugraha, Tb Eka Nur Samsu Sagala, Ida Satiti, Ika Setiabudhi, Verina Setiadi, Satya Shazana Dhiya Ayuni Srianturi, Yanuari