Lydia Anggraini
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View article: Pengaruh Media Interaktif Educaplay terhadap Hasil Belajar Matematika Siswa Kelas V SDN Lawangan Daya II
Pengaruh Media Interaktif Educaplay terhadap Hasil Belajar Matematika Siswa Kelas V SDN Lawangan Daya II Open
Penelitian ini secara khusus mengkaji dampak implementasi Educaplay terhadap peningkatan prestasi akademik siswa, dengan fokus pada mata pelajaran matematika di kelas V SDN Lawangan Daya II. Metode penelitian yang digunakan adalah pendekat…
View article: Experimental and Computational Analysis of UHMWPE-Based Multi-Layered Bulletproof Vests Under 9mm Projectiles Impact
Experimental and Computational Analysis of UHMWPE-Based Multi-Layered Bulletproof Vests Under 9mm Projectiles Impact Open
This study investigates the ballistic performance and energy absorption of multi-layered UHMWPE bulletproof vests against 9mm projectiles using experiments and finite element simulations (LS-DYNA). Two configurations were analyzed: a conve…
View article: Impact Behavior of Multi-Layered UHMWPE Vests Reinforced with Titanium and PVC for Ballistic Protection
Impact Behavior of Multi-Layered UHMWPE Vests Reinforced with Titanium and PVC for Ballistic Protection Open
Achieving lightweight and high-performance bulletproof vests is essential for military and law enforcement, where balancing mobility and ballistic resistance is critical. This study investigates the ballistic performance of multi-layered U…
View article: Nilai Budaya dalam Situs Pati Ayam sebagai Pelestarian Budaya Lokal Bagi Generasi Z
Nilai Budaya dalam Situs Pati Ayam sebagai Pelestarian Budaya Lokal Bagi Generasi Z Open
The Pati Ayam Site in Kudus Regency is one of the important cultural heritages that represents past civilization in Central Java. The purpose of this study is to explore the cultural values contained in the Pati Ayam Site and the right a…
View article: Predictive maintenance on ball mill liner using 3D scanner and its analysis in the mining industry of Papua Indonesia
Predictive maintenance on ball mill liner using 3D scanner and its analysis in the mining industry of Papua Indonesia Open
In the mining industry, the primary production process entails transforming large ore deposits into valuable concentrates. To get minerals from large ores, a grinding machine is needed to reduce the size of the ore, and then the minerals c…
View article: Utilization of biosilica for energy-saving tire compounds: Enhancing performance and efficiency
Utilization of biosilica for energy-saving tire compounds: Enhancing performance and efficiency Open
Energy-saving tires have been developed by researchers in the industry in order to minimize hysteresis loss. In general, this is achieved by combining precipitated silica sourced from silica sand with a silane coupling agent. This strategi…
View article: Experimental study on the performance of multi-layered bulletproof vest
Experimental study on the performance of multi-layered bulletproof vest Open
A bulletproof vest should have high strength and durability to resist a bullet as vital war equipment. However, the cost of creating good quality bulletproof vest is expensive. Therefore, research about an alternative bulletproof vest with…
View article: Analysis of Welding Procedure Specifications for steel line pipe material
Analysis of Welding Procedure Specifications for steel line pipe material Open
This study proposes the welding process steel line pipe material of API5L Grade X52 diameter Ø8 inch SCH80 type, subjected to the good quality of the product by following the Welding Procedure Specifications (WPS). The purpose of welding u…
View article: Metamaterial and metasurface based emitters for solar thermal photovoltaic applications: analytical review
Metamaterial and metasurface based emitters for solar thermal photovoltaic applications: analytical review Open
The motivation behind this paper stemmed from the fact that the world consumes the fast-depleting fossil fuel energy. Before the fossil fuel runs out, new technologies to harvest energy from alternative sources are needed. Sunlight is clea…
View article: Homogenization of Green SiO<sub>2</sub> from Rice Husk Burn through Potassium Hydroxide Solid-Liquid Extraction
Homogenization of Green SiO<sub>2</sub> from Rice Husk Burn through Potassium Hydroxide Solid-Liquid Extraction Open
In the agricultural countries, rice husk is an abundant waste, especially as one of the largest sources of silica (SiO 2 ) production that can be produced. By complete combustion, to about 87% - 97% SiO 2 content can be produced from rice …
View article: Performance Optimization of Power Plant Waste Heat Using H2O-LiBr Absorption Refrigerant System
Performance Optimization of Power Plant Waste Heat Using H2O-LiBr Absorption Refrigerant System Open
This paper examines the use of waste energy in a 3x1 MW Gas Engine Power Plant (GEPP) on Bawean Island, Indonesia. The feasibility method uses water-lithium bromide (H2O-LiBr) technology as absorption refrigeration technology. In addition,…
View article: Utilization of Palm Oil Shells (Elaeis Guineenses Jacq) as Particle Board Raw Material
Utilization of Palm Oil Shells (Elaeis Guineenses Jacq) as Particle Board Raw Material Open
Particle board is a commodity in high demand in Indonesia.However, because wood is the main raw material involved in particle board production, this high demand poses a great threat to forest ecosystems.Therefore, palm oil shells have been…
View article: The J-value as the measurement tool of the bonds investor's behavior
The J-value as the measurement tool of the bonds investor's behavior Open
For many years, mathematics has been used to solve the problem in economic and finance instead of natural science and engineering. This paper shows how accurate mathematics reads financial behavior. One of the financial areas using the mat…
View article: Aluminum Alloy Piston Fabrication Technology by Super Forging-KIRIU
Aluminum Alloy Piston Fabrication Technology by Super Forging-KIRIU Open
This research aims to produce pistons a lighter and stronger piston, even in high compression and high engine speed conditions. The piston fabrication process is carried out by super forging using Aluminum as a raw material with a compound…
View article: Hot forgeability of SCr420 low-alloy steel for piston rod application
Hot forgeability of SCr420 low-alloy steel for piston rod application Open
Microstructure development and mechanical property of SCr420 low-alloy steel (equivalent to AISI 5120) obtained by the forging process have been investigated. The relationship between the forgeability and mean grain sizes were examined. Th…
View article: ANALYSIS OF COMPOSITE ELECTRIC VEHICLE BODY
ANALYSIS OF COMPOSITE ELECTRIC VEHICLE BODY Open
This paper presents a study of a composite car body using finite element method. The body is made of surface model and the study is conducted to simulate the possible deformation of the body under certain load. The objective is to find tha…
View article: Evaluation of trophic status of Deudap Beach and Lhok Reudeup Beach, Nasi Island, Aceh Province, based on nitrate and phosphate concentration, and chlorophyll-a abundance.
Evaluation of trophic status of Deudap Beach and Lhok Reudeup Beach, Nasi Island, Aceh Province, based on nitrate and phosphate concentration, and chlorophyll-a abundance. Open
The investigation of the trophic status based on the nitrate-phosphate correlation and chlorophyll- a abundance in Deudap beach and Lhok Reudup beach, Pulau Nasi, Aceh were carried out in November 2018. Determination of sampling location b…
View article: Sifat Mekanis dan Struktur Mikro pada Sambungan Las Gesek Baja SCM415H untuk Aplikasi Poros Roda Belakang
Sifat Mekanis dan Struktur Mikro pada Sambungan Las Gesek Baja SCM415H untuk Aplikasi Poros Roda Belakang Open
This research aims to evaluate the mechanical properties and microstructure of steel alloy SCM415H processed by friction welding for rear axle shaft application. Friction welding is a process to connect materials without using fillers and …
View article: FINITE ELEMENT ANALYSIS WITH STATIC AND DYNAMIC CONDITIONS OF SPARE WHEEL CARRIER FOR OH 1526 FABRICATED BY SAPH 440 HOT ROLLED STEEL
FINITE ELEMENT ANALYSIS WITH STATIC AND DYNAMIC CONDITIONS OF SPARE WHEEL CARRIER FOR OH 1526 FABRICATED BY SAPH 440 HOT ROLLED STEEL Open
Spare Wheel Carrier is a component that must exists in a heavy duty vehicle. The function of this part is to store additional wheel in order to deal with punctures that might happen to the tire. This part is usually placed in the middle of…
View article: DESAIN DAN PEMILIHAN BAHAN PADA HELM WAJAH TERBUKA DENGAN SISTEM AIRBAG DARI GFRP / EPP / NYLON
DESAIN DAN PEMILIHAN BAHAN PADA HELM WAJAH TERBUKA DENGAN SISTEM AIRBAG DARI GFRP / EPP / NYLON Open
Helm merupakan perangkat yang wajib digunakan saat mengendari sebuah sepeda motor. Helm akan melindungi atau mengurangi dampak dari benturan ke kepala. Menggunakan helm adalah salah satu cara preventif dalam berkendara. Namun, perlindungan…
View article: ANALISA PENGARUH GAYA TEKAN AKHIR TERHADAP SAMBUNGAN LAS HASIL PENGELASAN GESEK BERBAHAN TEMBAGA DAN KUNINGAN
ANALISA PENGARUH GAYA TEKAN AKHIR TERHADAP SAMBUNGAN LAS HASIL PENGELASAN GESEK BERBAHAN TEMBAGA DAN KUNINGAN Open
Pengelasan gesek (Friction Welding) adalah salah satu teknik pengelasan dengan panas yang beralasal dari dua permukaan logam yang saling bergesekan satu sama lain. Penelitian ini mengkaji tentang efek tekanan akhir pada proses pengelasan. …
View article: PEMODELAN DAN ANALISA STRUKTUR MEKANIKA PADA KONTROL SISTEM ADAPTIF END EFFECTOR DENGAN DYNAMIXEL AX-18A MOTOR SERVO
PEMODELAN DAN ANALISA STRUKTUR MEKANIKA PADA KONTROL SISTEM ADAPTIF END EFFECTOR DENGAN DYNAMIXEL AX-18A MOTOR SERVO Open
The main objective of this project is to make a descriptive contribution to the understanding of adaptive end-effector design combined with servo motors. The simulation and design of this tool is located at the end of the robotic arm, whic…
View article: OPTIMATION PARAMETERS OF CNC MILLING PROGRAMMING MACHINE ON THE PROCESS TIME AND ITS EFFECT ON THE EFFICIENCY
OPTIMATION PARAMETERS OF CNC MILLING PROGRAMMING MACHINE ON THE PROCESS TIME AND ITS EFFECT ON THE EFFICIENCY Open
The problems revealed in this research is about Optimization parameters of CNC milling programing machine on the process time and its effect on the efficiency. The purpose of this research are to know the effect of feed rate, depth of cut,…
View article: Failure analysis of S50C carbon steel applied for fine boring transmission system
Failure analysis of S50C carbon steel applied for fine boring transmission system Open
The purpose of this research was to analyze the failure of the axle of fine boring transmission system shaft engine which was subjected to JIS G4051 S50C carbon steel. In industrial machinery, fatigue failure is often found on the work mac…
View article: Removal of COD and total nitrogen from palm oil mill effluent in flatphotobioreactor using immobilised microalgae Chlorella sp.
Removal of COD and total nitrogen from palm oil mill effluent in flatphotobioreactor using immobilised microalgae Chlorella sp. Open
Untreated palm oil mill effluent (POME) contains organic materials, tannin compounds and high in soluble solids that can damage the environment when discharged into inland waterways and cultivated lawns.Organic materials of the POME can be…
View article: PROSPEK BISNIS DENGAN TEKNOLOGI DSSL (DRY SLUDGE SYNTHETIC LUBRICANT) SEBAGAI SOLUSI PENGURANGAN SLUDGE LIMBAH B3 (BERBAHAYA DAN BERACU N) SEKALIGUS PELUANG BENEFIT WAX (C20+) SEBAGAI SYNTHETIC LUBRICANT
PROSPEK BISNIS DENGAN TEKNOLOGI DSSL (DRY SLUDGE SYNTHETIC LUBRICANT) SEBAGAI SOLUSI PENGURANGAN SLUDGE LIMBAH B3 (BERBAHAYA DAN BERACU N) SEKALIGUS PELUANG BENEFIT WAX (C20+) SEBAGAI SYNTHETIC LUBRICANT Open
PT Jababeka Infrastuktur Waste Water Treatment Plant (WWTP) mengolah air limbah kawasan industri Jababeka dengan system Biological Aerobic Treatment menghasilkan lumpur aktif (sludge) dengan kandungan B3. Sehingga harus menanggung biaya pe…
View article: Batch Study, Kinetic and Equilibrium Isotherms Studies of Dye Adsorption of Jumputan Wastewater onto Betel Nuts Adsorbent
Batch Study, Kinetic and Equilibrium Isotherms Studies of Dye Adsorption of Jumputan Wastewater onto Betel Nuts Adsorbent Open
Adsorption is an alternative process which can reduce the contaminant of the Jumputan wastewater. Betel nuts activated carbon is one of bio-sorbent that can be utilized for dye adsorption process. The activated carbon is made with carboniz…
View article: Fatigue Analysis pada Pegas Daun Jenis SST 74 dalam Aplikasi Industri Alat Berat dengan Pemodelan Metode Elemen Hingga
Fatigue Analysis pada Pegas Daun Jenis SST 74 dalam Aplikasi Industri Alat Berat dengan Pemodelan Metode Elemen Hingga Open
Pada industri manufaktur dan rekayasa alat berat dibutuhkan pemeliharaan yang baik guna menghasilkan produk berkualitas tinggi. Namun, kerusakan secara tidak sengaja dan menyebabkan kerugian besar baik dalam hal moral maupun material bagi …
View article: Analysis of Porosity Defects in Aluminum as Part Handle Motor Vehicle Lever Processed by High-pressure Die Casting
Analysis of Porosity Defects in Aluminum as Part Handle Motor Vehicle Lever Processed by High-pressure Die Casting Open
This research discusses the testing and analysis of cracking Aluminum (Al) material. Al as a handle lever was used for a braking device on a motor vehicle. Cracking of handle lever due to the part content of porosity from hydrogen gas. The…
View article: Characteristic of betel nuts activated carbon and its application to Jumputan wastewater treatment
Characteristic of betel nuts activated carbon and its application to Jumputan wastewater treatment Open
Wastewater from Jumputan production contains synthetic dye which is harmful to the environment. The contaminant can be reduced by adsorption process using activated carbon. The activated carbon was prepared from betel nuts with carbonizati…