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All Journal Jurnal Teknologi Jurnal Spektra Jurnal Bina Mulia Hukum Eklektik : Jurnal Pendidikan Ekonomi dan Kewirausahaan TANJUNGPURA LAW JOURNAL Jambe Law Journal Pancasila and Law Review Constitutionale Journal Research in Islamic Education PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Legal Protection for the Partnership Agreement Parties Jurnal Ilmiah Hukum dan Hak Asasi Manusia JKMP (Jurnal Kebijakan dan Manajemen Publik) AKHLAQUL KARIMAH: Jurnal Pendidikan Agama Islam Jurnal Nusantara Mengabdi Journal of Progressive Law and Legal Studies Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat SCLS International Journal of Renewable Energy Development Prosiding Seminar Hukum Aktual Fakultas Hukum Universitas Islam Indonesia Indonesian Journal of Community Empowerment Al Iman: Jurnal Keislaman dan Kemasyarakatan Lex Scientia Law Review
Ikhsan Setiawan
Physics Departement, Faculty Of Mathematics And Natural Sciences Universitas Gadjah Mada, Sekip Utara BLS 21 Yogyakarta 55281 Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Physics Public Health Social Sciences Other

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Pengaruh Jejari Hidrolik Stack terhadap Beda Suhu Onset pada Prime Mover Termoakustik Gelombang Berdiri Murti, Prastowo; Widyaparaga, Adhika; Setiawan, Ikhsan; Utomo, Agung Bambang Setio; Nohtomi, Makoto
Jurnal Spektra Vol 16, No 2 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

AbstrakPrime mover termoakustik adalah sebuah alat yang digunakan untuk mengkonversi panas menjadi kerja dalam bentuk bunyi. Panas yang digunakan dapat berasal dari sumber panas yang tak terpakai dan melimpah seperti insenerasi alat-alat rumah sakit, pabrik industri, geotermal, dan energi surya. Untuk dapat mulai menghasilkan bunyi (kondisi onset) dibutuhkan beda suhu minimum antara ujung-ujung stack yang disebut 15(∆T)onset">   Semakin kecil beda suhu onset 15(∆T)onset">  maka suhu sumber panas yang diperlukan semakin rendah. Stack merupakan jantung dari prime mover termoakustik dan tempat terjadinya osilasi paket gas akibat adanya perbedaan suhu antara kedua sisinya. Pada penelitian ini, stack yang digunakan adalah lembaran-lembaran mesh (kasa kawat) stainless-steel yang tersusun rapat dengan jejari hidrolik 0,71 mm, 0,59 mm, 0,50 mm, dan 0,34 mm dengan panjang 4 cm, 5 cm, dan 6 cm. Dalam penelitian ini, panjang resonator adalah 1,28 m dan udara digunakan sebagai medium dengan tekanan atmosfer. Telah ditemukan bahwa jejari hidrolik stack mempengaruhi beda suhu onset 15∆Tonset">  pada prime mover termoakustik. Jejari hidrolik optimum pada 0,59 mm. Selain itu, ditemukan juga bahwa stack yang lebih panjang membutuhkan waktu yang lebih lama untuk mencapai kondisi onset dibandingkan dengan stack yang lebih pendek. Untuk mendapatkan 15∆Tonset">   lebih rendah dan waktu onset lebih cepat, perlu dilakukan penelitian tambahan tentang pengaruh beberapa paramater lain seperti panjang resonator, kalor input dan tekanan gas.Kata kunci : prime mover termoakustik, Stack mesh stainless steel, jejari hidraulik, beda suhu onset 15∆Tonset"> , waktu onset AbstractThermoacoustic prime mover is a device to convert heat into work in the form of sound. The heat used here can be obtained from unused and abundant heat source such as incineration hospital equipment, geothermal, and solar energy. A minimum onset temperature difference 15∆Tonset">  between stack ends is needed to produce the sound. Low onset temperature differences are desired when we intend to utilize low quality of heat sources. Stack is the main part of thermoacoustic prime mover in where the gas parcels oscillate due to a large temperature gradient along the stack. The stack used in this research is a pile of stainless-steels wire mesh screen with various hydraulic radius of 0.71 mm, 0.59 mm, 0.50 mm, and 0.34 mm and various stack length of 4 cm, 5 cm, and 6 cm. The length of resonator is 1.28 m and air as the working medium at atmosphere pressure is used to fill the resonator. It is found that the hydraulic radius is affecting the 15∆Tonset">  in the thermoacoustic prime mover. Hydraulic radius optimum at 0,59 mm. In addition, it is also found that longer stacks need longer time to reach the onset 15 "> condition. Investigation on the influences of other parameters, such as resonator length, heat input, and gas pressure, are required in order to have low 15∆Tonset"> .Keywords: themo-acoustic prime mover, stack mesh stainless steel screen, hydraulic radius, onset  Themperature difference 15 ∆Tonset"> , onset time.
PENGARUH JEJARI HIDROLIK REGENERATOR DAN FREKUENSI GELOMBANG BUNYI TERHADAP KINERJA POMPA KALOR TERMOAKUSTIK GELOMBANG BERJALAN Prastowo Murti; Ikhsan Setiawan; Muhammad Fadly; Solli Dwi Murtyas
Jurnal Teknologi Vol 10, No 2 (2018): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.10.2.147-152

Abstract

The refrigerant in the conventional heat pump has affected to the environmental. One of them is ozone depletion, thus, heat pump which has no impact on the environment is needed. The thermoacoustic heat pump is heat pump device which employs thermoacoustic phenomena and works with no refrigerant hence environmental benign. Thermoacoustics is phenomena sound wave that can cause a temperature difference or vice versa. The thermoacoustic heat pump produces temperature difference in the both side of the regenerator in which can be used as refrigerator and heater. Thermoacoustic heat pump consists of resonator tube, loudspeaker, and regenerator. Regenerator is the heart of thermoacoustic which is energy conversion takes place. Therefore, this research focuses on optimization of hydraulic radius of stainless steel wire mesh regenerator and frequency of the sound wave on the performance traveling-wave thermoacoustic heat pump. The experimental results show that hydraulic radius of regenerator and frequency of sound wave gives significant effect to temperature difference on the both side of the regenerator. The largest temperature difference reach is 51,5 °C, which is cold side have 12,2 °C that can be used as a refrigerator and hot side have 63,6 °C that can be used as a heater.
STUDI EKSPERIMENTAL PENGGUNAAN LOUDSPEAKER SEBAGAI PENGKONVERSI ENERGI BUNYI MENJADI LISTRIK DALAM ALAT PEMANEN ENERGI AKUSTIK (ACOUSTIC ENERGY HARVESTER) Ikhsan Setiawan
Jurnal Teknologi Vol 11, No 1 (2019): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.11.1.9-16

Abstract

Kebisingan di sekitar kita merupakan satu bentuk energi yang terbuang. Energi bunyi (akustik) tersebut sebenarnya dapat dimanfaatkan untuk menghasilkan energi listrik. Makalah ini memaparkan tentang eksperimen penggunakan loudspeaker sebagai komponen pengkonversi energi bunyi menjadi energi listrik dalam alat pemanen energi akustik (acoustic energy harvester), baik tanpa tabung resonator maupun dengan tabung resonator. Loudspeaker pengkonversi yang digunakan berjenis woofer dan memiliki diameter nominal 6 inci. Sumber bunyi yang digunakan adalah loudspeaker berdiameter 15 inci yang diberi sinyal oleh sebuah pembangkit sinyal audio yang diperkuat oleh sebuah penguat audio. Tingkat tekanan bunyi (sound pressure level, SPL) maksimum dalam penelitian ini adalah 105 dB. Tegangan listrik rms (Vrms) keluaran dari loudspeaker pengkonversi diukur pada resistor beban dengan resistansi 100 W, sehingga daya listrik rms (Prms) yang dihasilkan dapat dihitung. Hasil eksperimen pada loudspeaker pengkonversi tanpa resonator menunjukkan bahwa loudspeaker tersebut memiliki frekuensi kerja optimum sebesar 62 Hz yang menghasilkan Prms sebesar 0,78 mW dari bunyi dengan SPL 105 dB. Selanjutnya, hasil eksperimen dengan menggunakan resonator sepanjang 133 cm memperlihatkan bahwa Prms maksimum sebesar 20,7 mW diperoleh dari bunyi berfrekuensi 92 Hz dan SPL 105 dB. Hasil ini sangat baik apabila dibandingkan dengan hasil yang ditemukan oleh para peneliti lainnya yang memperoleh daya listrik 20 mW- 30 mW dari bunyi dengan SPL sebesar 151 dB (Pillai & Deenadayalan, 2014). Selain itu, hasil ini menunjukkan bahwa penggunaan tabung resonator dapat meningkatkan daya listrik yang dapat diperoleh.
Fiduciary: Financing Guarantees and Ownership in the Business Akbarina, Farida; Muslim, Shohib; Setiawan, Ikhsan; Khoirunnisa, Rizqi
Journal of Progressive Law and Legal Studies Том 2 № 03 (2024): Journal of Progressive Law and Legal Studies
Publisher : PT. Riset Press International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59653/jplls.v2i03.1122

Abstract

The concept of fiduciary is the transfer of material rights of an object based on trust, which often causes multiple interpretations. Ownership and control of a fiduciary guarantee object in various cases, it is not uncommon for disputes between creditors and debtors to occur in a fiduciary guarantee agreement because the creditor assumes that with the existence of executory rights as fiduciary recipients, the object of fiduciary guarantee is legally owned by the creditor so that the creditor has the right to take and sell the fiduciary guarantee object when the debtor defaults. Unilaterally, the debtor who considers that the object of the fiduciary guarantee is owned because the object is registered in his name so that the debtor can use the object freely, such as handing over to a third party or selling the object of the fiduciary guarantee unilaterally. The author employs normative legal research techniques. According to the study's findings, the debtor owns the Fiduciary Guarantee Object following the Law, and the debtor controls the collateral object for financial gain. A law should be made clearly and firmly to avoid conflicts between its articles. In the business world, a fiduciary is a security for the parties when funding is implemented. With this rights transfer, the fiduciary will have the power to make decisions while prioritizing other creditors.
CRIMINAL LAW POLICY IN BLASPHEMY ENFORCEMENT BASED ON RESTORATIVE JUSTICE Natamiharja, Rudi; Siswanto, Heni; Banjarani, Desia Rakhma; Setiawan, Ikhsan
Jurnal Bina Mulia Hukum Vol. 8 No. 1 (2023): Jurnal Bina Mulia Hukum Volume 8 Nomor 1 September 2023
Publisher : Faculty of Law Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23920/jbmh.v8i1.1178

Abstract

Policies for resolving religious blasphemy in Indonesia are regulated in Law Number 1/PNPS/1965 concerning the Prevention of Blasphemy of Religion and Article 156a of the Criminal Code. Sentences are often repressive and do not fulfill the value of justice. The formulation of the problem in this article is: what is the criminal law policy in the settlement of blasphemy and what kind of settlement model is chosen to handle the case. This research method is normative legal research with a statutory approach based on primary legal materials. The research results show that the imposition of punishment is the main solution. Meanwhile, the model chosen in the resolution of defamation of freedom of expression according to the concept of restorative justice uses an integrated approach that tries to implement penal and non-penal efforts simultaneously to fulfill justice for the perpetrators of defamation, including involving the role of the community through the Religious Communication Forum (FKUB). Suggestions that need to be conveyed are that criminal law policies are still being implemented, but harsh criminal sanctions are softened by using the concept of restorative justice, bearing in mind that not every case of blasphemy deserves a harsh sentence.
Guarding Privacy in the Digital Age: A Comparative Analysis of Data Protection Strategies in Indonesia and France Natamiharja, Rudi; Setiawan, Ikhsan
Jambe Law Journal Vol. 7 No. 1 (2024)
Publisher : Faculty of Law, Jambi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/home.v7i1.349

Abstract

Personal data protection is a critical issue in the contemporary digital era, marked by a significant rise in data collection and processing by both governmental and private entities. Indonesia, with its recently enacted Personal Data Protection Law, faces substantial challenges in implementation and enforcement. In contrast, France, as an EU member state, adheres to the General Data Protection Regulation (GDPR), widely regarded as the global benchmark for data protection. This study employs a comparative analysis to examine the legal frameworks, enforcement mechanisms, and data subjects' rights in Indonesia and France. Data were gathered through an analysis of legal documents, policy reports, and case studies on regulatory implementation in both countries. The results reveal that while there are notable differences in regulatory approaches and specifics, both countries aim to safeguard individuals' data rights. France's GDPR provides a more comprehensive and structured framework, whereas Indonesia is in the nascent stages of developing and refining its data protection regulations.
STUDI PENYIMPANAN ENERGI LISTRIK YANG DIHASILKAN OLEH ALAT PEMANEN ENERGI AKUSTIK (ACOUSTIC ENERGY HARVESTER) KE DALAM SUPERKAPASITOR Wibowo, Bagas Wahyu; Setiawan, Ikhsan
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol. 12 (2024): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2023
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/03.1201.FA01

Abstract

Abstrak Alat pemanen energi akustik adalah alat untuk menangkap energi akustik atau kebisingan dari lingkungan dan mengkonversinya menjadi energi listrik. Penelitian ini mempelajari secara eksperimen penyimpanan energi listrik yang dihasilkan oleh alat pemanen energi akustik ke dalam superkapasitor. Alat pemanen energi akustik pada penelitian ini menggunakan loudspeaker jenis woofer model W8347-B/H dengan diameter 10,2 cm yang difungsikan terbalik untuk mengubah energi gelombang bunyi yang diterimanya menjadi energi listrik. Loudspeaker dilengkapi dengan resonator akustik seperempat gelombang dan rumahan yang berbentuk silinder. Sistem penyimpanan energi listrik terdiri dari transformator step-up, rangkaian penyearah arus listrik, dan superkapasitor 100F/2,7V. Eksperimen dilakukan dengan memberikan bunyi kebisingan berfrekuensi tunggal yang divariasi dari 51 Hz sampai 60 Hz, dengan tiga macam sound pressure level (SPL) yaitu 90 dB, 95 dB, dan 100 dB, kepada alat pemanen energi akustik selama 60 menit, dan mengukur tegangan superkapasitor seiring dengan waktu pengisian. Diperoleh bahwa terdapat frekuensi optimum pada 53 Hz yang mengasilkan laju pengisian maksimum. Selain itu, ditemukan bahwa kenaikan SPL dari 90 dB ke 100 dB menghasilkan kenaikan laju rerata pengisian kapasitor sekitar 4,6 kali lipat. Dengan frekuensi 53 Hz dan SPL 100 dB, pengisian selama 60 menit menghasilkan tegangan superkapasitor sebesar 294 mV. Kata-kata kunci: Konversi energi, energi akustik, kebisingan lingkungan, energi listrik, superkapasitor Abstract An acoustic energy harvester is a device used to capture acoustic energy or noise from the environment and convert it into electrical energy. This research experimentally studied the storage of electrical energy generated by an acoustic energy harvester into a supercapacitor. The acoustic energy harvester in this study utilized an inverted woofer-type loudspeaker model W8347-B/H with a diameter of 10.2 cm to convert the received sound wave energy into electrical energy. The loudspeaker was equipped with a quarter-wave acoustic resonator and a cylindrical housing. The electrical energy storage system consisted of a step-up transformer, a rectifier circuit, and a 100F/2.7V supercapacitor. The experiment was conducted by subjecting the acoustic energy harvester to a single-frequency noise ranging from 51 Hz to 60 Hz, with three different sound pressure levels (SPL) of 90 dB, 95 dB, and 100 dB, for 60 minutes, while measuring the supercapacitor voltage during the charging process. It was found that there was an optimum frequency at 53 Hz that yielded the maximum charging rate. Additionally, it was discovered that increasing the SPL from 90 dB to 100 dB resulted in approximately a 4.6 times increase in the average charging rate of the capacitor. With a frequency of 53 Hz and an SPL of 100 dB, a 60-minute charging duration produces a supercapacitor voltage of 294 mV. Keywords: Energy conversion, acoustic energy, environmental noise, electrical energy, supercapacitor
Prediction of Onset Temperature in Standing Wave Thermoacoustic Engine with Mesh Screen Stack Murti, Prastowo; Astuti, Wijayanti Dwi; Setiawan, Ikhsan; Irsyadi, Fakih; Hudati, Imroatul
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.27-32

Abstract

A thermoacoustic engine is a engine that converts thermal energy into acoustic energy, which can be used to generate electricity or cooling. This engine is attractive because it consists only of a stack, heat exchangers, and a resonator. The stack serves as the primary component for the energy conversion process and consists of porous materials like an array of stainless steel mesh screens. To generate the acoustic energy, a minimum temperature difference is necessary between the two sides of the stack, called the onset temperature difference. However, the calculation for prediction of onset temperature on the stack made of mesh screen has not been addressed. Therefore, the objective of this paper is to propose a method that can be used to estimate the onset temperature difference in standing wave thermoacoustic engine with stacks made of mesh screen arrays. The onset temperature difference is predicted numerically using linear stability theory and matrix transfer methods. Experimental verification is carried out by using standing wave thermoacoustic engine from pervious study. The results showed that the lowest onset temperature difference (TH - TC = 140ºC) is obtained when rh = 0.497 mm. Furthermore, the numerical and experimental onset temperature difference comparisons show a qualitative agreement, allowing the onset temperature prediction method to be used in designing standing wave thermoacoustic engines with stacks made of mesh screens.
LEGAL CERTAINTY FOR INVESTORS POST DECISION OF THE MK NO.91/PUUXVIII/2020 TOWARD ECONOMIC RECOVERY IN INDONESIA Setiawan, Ikhsan; Mahdewi, Risa
Sriwijaya Crimen and Legal Studies Volume 1 Issue 2 December 2023
Publisher : Faculty of Law Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28946/scls.v1i2.3046

Abstract

Investment can be an important instrument for Indonesia because natural resources are abundant, but only a small portion can be explored by Indonesian citizens because they are constrained by not having large capital. Exploration requires large funds; therefore, the government brings foreign investors to Indonesia. Investors need to be a very important part of realizing the nation's ideals for the welfare of the people, as stated in the preamble of the 1945 Constitution. Investment can be put to good use to enhance economic development and become one of the instruments to increase the nation's national income. For this reason, after the decision of the Constitutional Court No. 91/PUUXVIII/2022, it will have a good impact on Indonesia's economic recovery. This research is a normative juridical research based on applicable legal sources. This research was analyzed descriptively with a qualitative approach. The results of the research will explain the effectiveness of the Constitutional Court's decision and see its impact on the Indonesian economy.
Analysis of a standing wave thermoacoustic engine with multiple unit stages Murti, Prastowo; Setiawan, Ikhsan; Rosafira, Jihan Zeinyuta; Widyaparaga, Adhika; Astuti, Wijayanti Dwi; Biwa, Tetsushi
International Journal of Renewable Energy Development Vol 13, No 4 (2024): July 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60098

Abstract

The thermoacoustic engine is an eco-friendly technology capable of harnessing solar and waste energy for electricity generation, in conjunction with a linear alternator, and can function as a heat pump. This engine type holds significant appeal due to its simplistic design, devoid of any mechanical moving components, comprising only a stack sandwiched between heat exchangers within a resonator. When the temperature gradient across the stack reaches the critical threshold (onset temperature), the working gas undergoes spontaneous oscillation. Typically, a high onset temperature is necessary to induce gas oscillation in a thermoacoustic engine due to viscous losses within the system. A method to lower the onset temperature by increasing the number of unit stages consisting of stacks and heat exchangers so that the engine can utilize low-grade thermal sources has been developed to overcome this challenge. However, this method has only been applied to traveling-wave thermoacoustic engines. Its application in standing-wave engines, which offer a more compact and straightforward structure, remains unexplored. This research aims to examine how the number of unit stages in a standing-wave thermoacoustic engine influences the onset temperature and acoustic field. The onset temperature is estimated using a fundamental hydrodynamics equation and the investigation of the acoustic field throughout the engine using DeltaEC software. Results showed that the strategic positioning of multiple unit stages is essential to achieve a low onset temperature. The minimum onset temperature, approximately 92°C, is obtained when three- or four-unit stages are installed. Additionally, increasing the number of unit stages does not affect the acoustic impedance and phase difference between pressure and velocity in the stack, while simultaneously enhancing both acoustic power output and thermal efficiency.
Co-Authors Abdul Chalim Abdul Chalim, Abdul Adhika Widyaparaga Agung B. S. Utomo Agung B. S. Utomo Agung Bambang S Utomo Agung Bambang Setio Utomo Agung Bambang Setio Utomo Amalia, Astrifidha Rahma Amrullah, Ustman Syah Anggerta, Lintang Alivia Astrifidha Rahma Amalia Astuti, Wijayanti Dwi Azimattara, Muchammad Daing B.S. Utomo Bayu Sujadmiko, Bayu Biwa, Tetsushi Danang D Cahyadi Davey, Orima Melati Desia Rakhma Banjarani Elvis, Elvis Eni Rustianingsih Fadloli Fadloli, Fadloli Farida Akbarina Hedwigis Harindra Heni Siswanto Hudati, Imroatul IRSYADI, FAKIH Isna Fitria Agustina Isnaini Rodiyah Iswara, Mochammad Agung Indra Khoirunisya, Siti Lailul Mursyidah M. Fakih Mahdewi, Risa Makoto Nohtomi, Makoto Mega C. Gupita Mufid Muhammad Fadly Mulaiyinatus Sifa Muslim, Shohib Natamiharja, Rudi Nurmansyah, Gunsu NURUL AZIZAH Otomo, Nobuhide Panjaitan, Oksha Dwi Anugrah Prastowo Murti Prastowo Murti, Prastowo Reliusman Dachi Rizqi Khoirunnisa Ro'isatin, Umi Anis Rosafira, Jihan Zeinyuta Sabatira, Febryani Solli Dwi Murtyas Untung Adi Santosa Wibowo, Bagas Wahyu Yoga Nur Adhitama Yuanita Fara Abdillah