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All Journal Journal of Mathematical and Fundamental Sciences Indonesian Journal of Chemistry Jurnal Elemen Jurnal Fisika : Fisika Sains dan Aplikasinya CITIZEN: Jurnal Ilmiah Mulitidisiplin Indonesia International Journal of Humanities Education and Social Sciences Formosa Journal of Applied Sciences (FJAS) Makara Journal of Science International Journal of Innovation in Mechanical Engineering and Advanced Materials Jurnal Indonesia Sosial Sains Indonesian Journal of Interdisciplinary Research in Science and Technology (MARCOPOLO)

Mas Ayu Elita Hafizah

Universitas Pertahanan Republik Indonesia

Author-ID : 272697

Religion Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences Other

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The Synthesis of Alginate-Capped Silver Nanoparticles under Microwave Irradiation Foliatini Foliatini; Yoki Yulizar; Mas Ayu Elita Hafizah
Journal of Mathematical and Fundamental Sciences Vol. 47 No. 1 (2015)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2015.47.1.3

Synthesis of silver nanoparticles (Ag-NP) was successfully performed within a few minutes by microwave irradiation of the precursor salt (AgNO3) and alginate mixed solution in one pot. Herein, alginate molecules acted as both a reducing and stabilizing agent for the preparation of the silver nanoparticles. The obtained nanoparticles were characterized by ultraviolet-visible (UV-Vis) spectroscopy, particle size analysis (PSA), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The pH and concentration ratio of the alginate/metal precursor salt greatly influenced the particle size and its distribution of Ag-NP. The higher the pH the higher the nucleation rate and the larger the electrostatic stabilization, while both of them were responsible for producing a smaller particle size and a narrower size distribution. A higher concentration ratio also yielded a smaller particle size and a narrower size distribution, but above the optimum ratio, the trend was conversely changed due to the reducing capability of the alginate, which was dominant above the optimum ratio, thus creating a high density of nuclei, allowing aggregation to occur. A lower ratio not only led to a higher tendency to produce larger particles, but also a higher probability of anisotropic particle shape formation due to the lack of reducing capability of the alginates.

Theoretical Analysis of Interaction Energy in Alginate-Capped Gold Nanoparticles Colloidal System Foliatini Foliatini; Yoki Yulizar; Mas Ayu Elita Hafizah
Indonesian Journal of Chemistry Vol 14, No 3 (2014)
Publisher : Universitas Gadjah Mada

Stability of Au/alginate nanocomposite was theoretically evaluated by computing various interactions energy which contributes in the system, including attraction and repulsion interaction. The results revealed that both polymer and electrostatic charges played a significant role in the stabilization, but the steric repulsion comes from polymer chain is a more effective stabilization mechanism than the electrostatic repulsion. Higher pH yielded in stronger electrostatic repulsion but when the alginate thickness is low the resulting nanocomposite was less stable in a long time period. Interaction energies for Au/alginate nanocomposite colloidal system was up to ~60 kT for alginate thickness of 1 nm, at very short particle-particle separation distance (< 1 nm). As the alginate thickness can be controlled by adjusting the alginate concentration, it can be concluded that the high stability of Au/alginate nanocomposite can be achieved by employing an appropriate amount of alginate concentration.

ANALISA AERODINAMIK, STRUKTUR, FLIGHT DYNAMIC AND PERFORMANSI UCAV (UNMANNED COMBAT AIR VEHICLE) Rosihan Ramin; Heriana Heriana; Bondan Tiara Sofyan; Mas Ayu Elita Hafizah
Citizen : Jurnal Ilmiah Multidisiplin Indonesia Vol. 2 No. 4 (2022): CITIZEN: Jurnal Ilmiah Multidisiplin Indonesia
Publisher : DAS Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53866/jimi.v2i4.126

PTTA (Unmanned Aircraft) is also used to support national security and reconnaissance, making it easier for the TNI to work and simultaneously saving the cost of monitoring Indonesian territories. This study will produce design details, design analysis with design configuration requirements from UCAV (Unmanned Combat Air Vehicle), which has Weight and Balance with a two-point landing case so that UCAV is declared safe to receive maximum load loads and flutter analysis shows that the vehicle does not occur. Flutter phenomenon up to a speed of 150 KTAS meets the requirements of aeroelastic flutter based on the rules set by CASR (Civil Aviation Safety Regulations) 23 and IMA (Indonesian Military Airworthiness). From the identification of DR&O (Design Requirements and Objectives) and Initial Sizing, there is an effect of airflow and angle of attack on UCAV on aerodynamic characteristics, used as contours of pressure and temperature on the body and vector for UCAV body velocity. Pressure contours, temperature contours, and velocity vectors on the UCAV so that the analysis in determining the performance of the aircraft is representative following CASR regulations 23 and 24

THE MEASUREMENT OF POTENTIAL RISK OF FIRE AND EXPLOSION AT GAS STASION IN TO ANTICIPATE NON-MILITARY THREATS Rizky Aferdiansyah; Novita Affuwani; Mas Ayu Elita Hafizah; Robertus Heru Triharjanto; Widianto Nugroho
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 3, No 3 (2021)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Gas stations (SPBU in Indonesia) have the potency for fire and explosion hazards due to the storage and distribution of flammable liquids, one of which is Pertamax. This can be a non-military threat in the dimension of public safety because if it occurs, the resulting loss could be very large in terms of material or life. This study aims to determine the risk of fire and explosion at Indonesian gas station. This study uses Dow's Fire and Explosion Index in asimulated case method. The potential for fire and explosion or the value of the Fire Explosion Index (F&EI) in the simulated case is 111,24. The actual exposure radius is 29.62 m and the damage factor to the Pertamax storage tank is 63%. The results of the study have a risk level that is classified as Intermediate, so it is necessary to control risks such as increasing active protection and is expected to be an input in efforts to safeguard against non-military threats so as to reduce the impact of risks and losses that occur in the Pertamax storage tank.

Asean Modern Leadership Styles: A Critical Analysis Ruly Gumilar; Pujo Widodo; Mas Ayu Elita Hafizah
Jurnal Indonesia Sosial Sains Vol. 3 No. 02 (2022): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

The countries that are members of ASEAN have a vision to create regional stability both politically, economically as well as defense and security. Strategic location of ASEAN countries, world geopolitical and geoeconomic dynamics, shifting of world power maps and conflicts of interest. This condition has the potential to make ASEAN the axis of the world, but ASEAN countries are not geographically integrated, so that the geopolitical position of each member country is different and different levels of economy have an impact on the implementation of an agreement. The importance of strategic leadership in ASEAN with a dynamic and visionary modern leadership style is needed to be able to maintain stability in the ASEAN region, as well as make a new axis of world power. The future of ASEAN is not only influenced by the leadership style of the ASEAN Chair, but is also influenced by the Leadership Style of ASEAN member countries, the ASEAN Leadership Style in recent years does not seem to have a significant impact. Based on the consideration of the different conditions of ASEAN members, the Modern Leadership Style: Adaptive and Visionary, can be applied by the ASEAN Chair, so that ASEAN's functions and roles are more optimal.

Use of Explosives: Classification and Regulation Seftiandra Bermana Bermana; Mas Ayu Elita Hafizah; Yayat Ruyat; Esa Dina Inda Rosyida
Indonesian Journal of Interdisciplinary Research in Science and Technology Vol. 2 No. 5 (2024): May 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/marcopolo.v2i5.9019

Of the many qualifications of explosives, for some reason allowed for use by civilians. This study aims to analyze the classification and regulation of the use of explosives, using the literature study method. As a result, there are special rules from several institutions for the use of explosives in various fields.

Microwave-Assisted Synthesis of Alginate-Stabilized Gold Nanoparticles Foliatini, Foliatini; Yulizar, Yoki; Hafizah, Mas Ayu Elita
Makara Journal of Science Vol. 18, No. 4
Publisher : UI Scholars Hub

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

during boreal summer to fall 2011. In this study, data from satellite observations and atmospheric reanalysis datasets

Sebuah Pembelajaran Penting Perang Falkland/Malvinas: Perspektif Sumber Daya Persenjataan Dan Alutsista Siregar, Supriadi; Novky Asmoro; Mas Ayu Elita Hafizah; Heri Budi Wibowo
International Journal Of Humanities Education and Social Sciences (IJHESS) Vol 3 No 3 (2023): IJHESS DECEMBER 2023
Publisher : CV. AFDIFAL MAJU BERKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55227/ijhess.v3i3.690

This research focuses on the analysis of the Falkland/Malvinas conflict that occurred in 1982 with the aim of understanding the differences in armament and military equipment resources between Argentina and the United Kingdom, as well as its impact on the outcome of the war. In the introduction section, we outline the research problem, which is the comparison of armament and military equipment between both sides, and describe the purpose and objectives of the research. This research uses a qualitative methodology with a literature review approach to gather data from various secondary sources such as books, scholarly journals, and research reports. This allows researchers to gain a comprehensive understanding of the Falkland/Malvinas war. The results of this research describe the superiority held by the United Kingdom in almost all aspects of armament, including the Sea Harrier fighter aircraft, which proved to be a decisive factor in their victory in aerial combat. The impact of these differences was Argentina's defeat and significant damage. The conclusion of this research highlights the importance of thorough military preparedness, advanced technology, and effective diplomacy in preventing armed conflicts. War will only bring great losses to both sides, as seen in the Falkland/Malvinas War. Therefore, diplomacy should be promoted as a solution to resolve international disputes and avoid unnecessary bloodshed

OPTIMALISASI PERAN LANUD SOEWONDO TERHADAP PERTAHANAN UDARA INDONESIA Wulandari, Tsaniyah; Heri Budi Wibowo; Mas Ayu Elita Hafizah; Y.H. Yogaswara
International Journal Of Humanities Education and Social Sciences (IJHESS) Vol 3 No 3 (2023): IJHESS DECEMBER 2023
Publisher : CV. AFDIFAL MAJU BERKAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55227/ijhess.v3i3.719

Soewondo Air Force Base (AFB) has an important role in maintaining the surrounding airspace's security, including securing the Soewondo Air Force assignment area from various threats that could potentially occur and threaten national sovereignty. Increasing the ability of air defense. needs to be done through an analysis of optimizing the role of the Soewondo air force base for Indonesia's air defense. The research was conducted using a qualitative method with sources of information obtained from the Commander of Soewondo air force base and a literature study. Soewondo air force base plays a role in Indonesia's defense as an airbase that has a strategic role in maintaining the security of the North Sumatra region and its surroundings. The limited capabilities and available weapon systems still hinder airspace surveillance. Cooperation and coordination between Soewondo air force base and relevant agencies are needed to maintain air security in North Sumatra and its surroundings and strengthen the weapon systems for optimal operation in air defense and safeguarding national sovereignty, particularly in securing vital national objects. Relocating Soewondo air force base to type A classification equipped with modern weapon systems, such as the Oerlikon Skyshield missile, and utilizing technologies like the QW-3 manpads missile, UAV for intelligence and surveillance missions, are crucial steps in achieving optimal air defense for Indonesia

ANALISIS SIFAT MEKANIK KOMPOSIT SERAT BAMBU TALI SEBAGAI MULTILAYERED ARMOR SYSTEM Ramin, Rosihan; Sofyan , Bondan Tiara; Hafizah, Mas Ayu Elita
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 1 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i1.231

Natural fiber composites are an alternative Multilayered Armor System (MAS) material. One of the most common natural fibers used as MAS is a fiber made from bamboo rope. Bamboo fiber composites have a low density and a low manufacturing cost. However, in terms of mechanical properties, bamboo fiber composites have different characteristics. In this research, the mechanical properties of the bamboo rope fiber composite, which has an orientation of 0°/90°, will be analyzed. The composite materials used are bamboo rope fiber as a reinforcement and epoxy as the fiber binding matrix. From the mechanical tests performed, it was found that the average tensile strength of the bamboo rope fiber composite was 109.86 MPa. The bending strength is 95.32 MPa, and the shear strength is 34.11 MPa.

Co-Authors Andreas Andreas Azwar Manaf Bondan Tiara Sofyan Esa Dina Inda Rosyda Esa Dina Inda Rosyida Foliatini Foliatini Foliatini Foliatini Heri Budi Wibowo Heriana Heriana Jonni Mahroza Mahroza Manawan, Maykel Nisa, Dinda Khoirun Novita Affuwani Novky Asmoro Prakoso, Lukman Yudho Pujo Widodo Ramin, Rosihan Rizky Aferdiansyah Robertus Heru Triharjanto Rosihan Ramin Ruly Gumilar Ruyat, Yayat Seftiandra Bermana Bermana Siregar, Supriadi Sofyan , Bondan Tiara Tasdik Tasdik Valency, Tiara Wahyu Widanarto, Wahyu Widianto Nugroho Wulandari, Tsaniyah Y.H. Yogaswara Yayat Ruyat Yoki Yulizar Yoki Yulizar

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