bluuebunny/crossref_metadata_2025 huggingface dataset:
Weight optimization of 200 mm diameter rocket motor tube using finite element method
Authors: Wibawa Lasinta Ari Nendra , Daryana Alit , Saparudin Parid , Indrayana Wan Dedy Fitrah , Handriyana Handriyana , Diana Asep , Sobirin Toris
Published: May 2024

The lightweight design of the rocket motor tube is a critical requirement for enhancing the rocket's flight performance. This study assesses the impact of wall thickness, cap thickness, and fillet radius on structural strength and the optimization of rocket motor tube weight using the finite element method with the assistance of Ansys software. A total of 12 finite element model variations, utilizing Aluminium 6061-T6, were developed and subjected to a uniform internal operating pressure load of 10 MPa. The design includes wall thickness variations of 8 and 10 mm, cap thickness options of 25 and 30 mm, and fillet radius dimensions of 20, 25, and 30 mm, allowing for a comprehensive comparison to achieve the required minimum safety factor while minimizing structural weight. The research concludes that increasing the fillet radius is a more recommended approach compared to increasing wall thickness and cap thickness. The results indicate that Model 9, with wall thickness, cap thickness, and fillet radius dimensions of 10 mm, 25 mm, and 30 mm, respectively, is the optimal choice due to its lightweight construction.
Characterization of FDM 3D Printed Parts Using TPU + PETG Filaments For Shin Guard Products
Authors: Darsin Mahros , Yulio Agit Yoga , Syuhri Ahmad , Ramadhan Mochamad Edoward , W.C.S I Made Ivan , Sumarji Sumarji
Published: May 2024

3D printing machines are used to print products that support sports activities, such as shin guards. During sports, shin guards are protective equipment to prevent injury to the lower legs. Filaments that are suitable for making shin guards are thermoplastic polyurethane (TPU) and polyethylene terephthalate (PETG) because they have impact resistance properties needed to protect the feet during sports. The variation is the level parameter layer height, nozzle temperature, printing speed, and bed temperature. Next, an impact test will be carried out to determine the optimal parameter variation on the 3D printing machine, which is expected to be a reference for printing quality products. This study uses a 3D printer, Ender v3, to print specimens and shin guard products. The material used is TPU+PETG filament. The Taguchi method with the orthogonal matrix L9(3)4 was repeated thrice for each experiment. After that, an analysis of variance was carried out. Parameter variations used in the study were layer height (0.1 mm, 0.2 mm, 0.3 mm), nozzle temperature (220℃, 225℃, 230℃), printing speed (45mm/s, 45mm/s, 50mm/s) and bed temperature. (70℃, 75℃, 80℃). In this study, Charpy impact testing will be carried out. The combination of factors that can produce an optimal impact test is layer height level 2 (0.2 mm), nozzle temperature level 1 (220℃), printing speed level 3 (50 mm/s) and bed temperature level 2 (75℃) with an impact strength value the highest was 27.20 and the lowest was 11.07. The combination of factors that have the most significant effect on the impact test strength values is layer height 63.97%, nozzle temperature 6.19%, printing speed 2.07% and bed temperature 4.74%.
Optimization Of Gas Turbine Performance 2.1 Using the Overhaul Combustion Inspection Method
Authors: Handoko Susilo , Hendra Hendra , Suharyadi Hafid , Widiyanto Totok
Published: May 2024

Gas turbines are one type of internal combustion drive, the initial mover utilizes gas combustion as a fluid to rotate the turbine with internal combustion. Gas turbines at private companies producing electricity use the initial movers, namely gas turbines and steam turbines. Therefore, it is also called the "Steam Gas Power Plant/PLTGU.”Private company especially in Block 2, uses two gas turbine units with Mitsubishi GT 2.1 specifications which are used as the initial drive of the generator. Types of overhauls in gas turbines are divided into three, including turbine inspection, combustor inspection, and major inspection. In maintaining the reliability of the GT 2.1 Gas Turbine, an overhaul combustion inspection was carried out in the combustion chamber because there was an increase in heat rate of 17,9% which caused a decrease in thermal efficiency and net turbine power of the GT 2.1 Gas Turbine by 17% and 2,1%. So that steps are taken to optimize the GT 2.1 Gas Turbine with the combustion inspection method by repairing and cleaning the combustion bucket nozzle. Increased thermal efficiency by 27,8% or 27,13% to 36,01% from data before overhaul. This was also followed by an increase in compressor power and turbine power so that the net turbine power increased by 38% or 141339,35 hp to 195246,54 hp.
The Impact Of Introducing Brown Gas Into The Incoming Air Flow On The Performance Of An Internal Combustion Engine
Authors: Wahyu Mujahid , Susilo Sugeng Hadi , Kamal Dianta Mustofa
Published: May 2024

The increase in the number of motorized vehicles has led to challenges in maintaining environmental air quality, combustion efficiency, and the sustainability of fossil fuels. An innovative solution to address these issues is the utilization of brown gas. This study aims to investigate the impact of introducing brown gas into the incoming air flow on the performance of an internal combustion engine. The brown gas flow rate varies based on the gas production rate resulting from variations in the addition of NaOH (10 g/l, 20 g/l, and 30 g/l) to every 1 liter of water in the generator. Gas production rates are measured using a flow meter. The influence of brown gas on gasoline engine performance is assessed through power testing with a chassis dyno test engine and exhaust emissions testing with a gas analyzer. The findings reveal that the highest flow rate of brown gas is achieved with the addition of 30 g/l NaOH during the electrolysis process. Introducing brown gas into the incoming air flow can increase maximum engine power by 15.5% and reduce CO exhaust emissions by 23.37%.
Mechanical properties of FDM 3D printed component using self-made PLA-titanium filament: hardness perspective
Authors: Darsin Mahros , Junaedi Faris Ahmad , Triono Agus , Hermawan Yuni , Hardiatama Intan , Wibowo R. Koekoeh Koenjtoro , Basuki Hari Arbiantara
Published: May 2024

3D printing, also known as additive layer manufacturing, is a technique that creates three-dimensional objects or any shape from a digital model. It works by building objects layer-by-layer, similar to how a laser printer operates. Fused Deposition Modeling (FDM) is a widely used technique in 3D printing because it is easy to use, cost-effective in production, and environmentally friendly. This study focuses on a self-made filament made of a PLA-titanium mixture. PLA is a biodegradable thermoplastic polymer sourced from plants, whereas titanium is a strong, lightweight, and corrosion-resistant metal. To measure the hardness of different materials, there are several methods available. In this study, the Shore D hardness test, specifically designed for polymer materials, was used. Data were collected using the Taguchi method, specifically L4 (23), and the data were analysedusingAnalysis of Variance (ANOVA). The variations in print parameters examined in this study include nozzle temperature (230°C and 240°C), layer height (0.2 mm and 0.3 mm), and print speed (30 mm/s and 40 mm/s). The aim of this study was to determine whether there were any changes in the hardness of the specimens. The ANOVA results revealed that the most influential parameter was print speed, with a contribution value of 56.01%. The results demonstrated that the printing parameters affected the hardness of the printed specimens. The highest hardness level of 56.3 Shore D was obtained with a nozzle temperature of 240°C, a layer height of 0.3 mm, and a print speed of 30 mm/s. The application of this study was demonstrated through the creation of dentures made from PLA-titanium.
Improving the performance of microbubble through the modification and optimization of venturi-type generator
Authors: Sidhi Sigit Deddy Purnomo , Pujianto Andreas , Nurfauzi Akhmad , Prasetyo Djoko , Basino Basino , Ansori Muhammad Alfan , Sirait Egbert Joshua , Prakoso Bagas
Published: May 2024

Venturi-type generators are recognized as one of the most promising microbubble generators with potential in various fields. However, there is still room for further optimization of their performance to meet the requirements of real applications, such as aeration systems or water treatment applications. This research modified the geometry of a venturi-type generator with specific dimensions:  a length of 80 mm, an inside diameter of 26 mm, a throat diameter of 7.2 mm, a convergent nozzle angle of 30°, a divergent diffuser angle of 30°, and an airflow inlet diameter of 6 mm. By varying the water flow rates (i.e., 22 L/min, 26 L/min, and 30 L/min) and air flow rates (i.e., 0.1 L/min, 0.2 L/min, and 0.3 L/min), the study observed the average diameter, size distribution, Standard Oxygen Transfer Rate (SOTR), and Standard Aeration Efficiency (SAE) of the generated microbubbles. This study aims to improve the performance of a microbubble generator, particularly by optimizing the relative size, distribution, and main parameters for real applications. The proposed modification and optimization successfully produced microbubbles with an average diameter of 180-450 μm. Furthermore, the optimal combinations of water and air flow rates (i.e., 30 L/min of water and 0.1 L/min of air) produced approximately 60% of microbubbles with a diameter of no more than 200 μm. These combinations also enable the delivery of a SOTR and SAE values of 0.94 kgO2/h and 1.73 kgO2/kWh, respectively.
Analysis of biodiesel process from waste cooking oil using heterogeneous catalyst field snail shell (pila ampullacea)
Authors: Ridho Ainur Rosyid , Prasetyo Dafit Ari , Susmiati Yuana , Ulma Zeni
Published: May 2024

Biodiesel is an alternative fuel in the form of Fatty Acid Methyl Ester (FAME) which can be renewed using vegetable oils and animal oils through esterification or transesterification processes. This study used waste cooking oil as a raw material for biodiesel with a CaO catalyst from the shells of field snails (Pila ampullacea) which were calcined for 4 hours at a temperature of 700°C. This experiment aim to study of the effect of temperature (55°C, 60°C, 65°C) and catalyst weight (4%, 6%, 8%), for 2 hours the transesterification process and the molar ratio of oil to methanol was 1:9. Crude Biodiesel from the transesterification process washed using dry washing method with activated coconut shell charcoal which has been activated using 1M H3PO4. Based on this research, the optimum yields about 91,5%-volume, were obtained in A2T2 with temperature 60°C and a catalyst weight of 6% with a biodiesel yield of 91.5%. The characteristics of the biodiesel produced were kinematic viscosity 3.32 cSt, density 863 Kg/m3, acid number 0.543%, iodine number 14.3%-mass, methyl ester content 169.12% and cetane number 43.28%-mass.
The effect of cutting depth, feed rate, and cutting angle on surface roughness in the lathe process of aluminum 6061.
Authors: Suwanda Totok , Ramdhan Gilang Joy Habib , Ardiyansyah Nur
Published: May 2024

In the turning process, the machining parameters have a significant impact on the product quality. Consumers frequently request that certain industries adhere to product quality standards, especially regarding surface texture. Numerous product failures have resulted in dissatisfaction among the company's clientele because many lathe operators are fixated solely on product size drawings and are unaware of factors that can impact the surface roughness value. This investigation was conducted to ascertain how machining parameters affect surface irregularity. Variations in feed rates of 47.5 mm/min and 345.6 mm/min, cutting angles of 60° and 80°, and depths of cut of 1 mm and 3 mm were utilized to conduct the investigation on aluminum alloy 6061 specimens. The results of turning were evaluated for surface roughness using a surface roughness analyzer and a macro test to determine the structure of the surface roughness. Using the Minitab 2019 application, the obtained data was then analyzed to determine the influence of each trimming parameter working individually or simultaneously. Using the method of geometric factorial analysis, integrate the research parameters. The results indicated that the surface roughness increased as the feed rate increased; the lowest surface roughness was achieved with a depth of cut of 1 mm, a feeding rate of 47.5 mm/min, and a cut angle of 80°. In this study, the surface roughness value decreased as the cutting angle increased at lower levels of feeding rate, while the surface roughness value increased at higher levels of feeding rate.
Study of hydrodynamic characteristics in oscillating wave surge converter
Authors: Julian James , Anggara Rizki Aldi , Naufal Ridwan Daris , Ramadhani Rifqi , Prasetyo Eko Andi , Wahyuni Fitri , Gunasti Nabilah Dwi
Published: May 2024

In the realm of renewable energy, researchers worldwide have been paying close attention to developing the Oscillating Wave Surge Converter (OWSC) device. This device has the potential to harness the power of ocean waves and convert it into a reliable source of clean energy. Hydrodynamic characteristics are essential parameters in developing OWSC devices. Therefore, this research conducted a hydrodynamic study on the OWSC device with variations in ocean wave periods, including T= 1.5, 1.7, 1.9, 2.1, and 2.3. The Boundary Element Method (BEM) describes the interaction between sea waves and floating body structures. This method assumes incompressible, inviscid, and irrotational flow. A numerical approach is used as a calculation method followed by verification and validation to support the level of actualization. The research results showed that the incident wave caused the OWSC device to experience a deviation from its equilibrium position in the form of an oscillating flap inclination angle as a form of hydrodynamic characteristics. The sea wave period correlatedwith the rate of change in flap position over time, including the maximum deviation in the flap angle. As a power plant, the performance of the OWSC device can work at reasonably short-wave period intervals based on the device's ability to produce mechanical power. The highest average mechanical power was achieved in the T= 1.5 period of 34.49 Watts with an efficiency of up to 52.43%. The OWSC device requires a high intensity of wave energy in a short duration to generate optimal mechanical power. It is important to note that optimal mechanical power generation is crucial for the OWSC device to function effectively. Therefore, the device should be placed in a location where the wave energy intensity is consistently high.
Biomechanics and biocompatibility assessment of bone drilling for surgical application: asystematic literature review
Authors: Lenggo Ginta Turnad Lenggo Ginta , Mujiarto Mujiarto , Jufriadi Jufriadi , Setyobudi Nanang , Yulianto Katri , Febriansyah Dwi Jaya , Azka Muizuddin
Published: May 2024

This systematic literature review delves into the intricate relationship between biomechanics and biocompatibility within the context of bone drilling for surgical applications. It meticulously analyzes the forces, stresses, and strains that bone undergoes during drilling, shedding light on essential variables crucial for enhancing surgical efficacy. Moreover, it scrutinizes the mechanical attributes of drilling tools, particularly drill bits, assessing factors such as material composition, design intricacies, and heat generation, all of which profoundly influence drilling performance. The review also thoroughly investigates the implications of drilling materials on bone tissue biocompatibility, addressing concerns such as corrosion, wear debris, and potential toxicity. By synthesizing current research, it offers up-to-date insights into advancements and strategies aimed at overcoming challenges in bone drilling. Ultimately, this review serves to refine bone drilling techniques, advocating for safer and more efficient surgical practices, and ultimately aiming to improve patient outcomes through a comprehensive understanding of biomechanical and biocompatibility considerations.
Internet and Social Media Impact on Health and COVID-19 in Puerto Rico
Authors: De la Cruz Ivan
Published: May 2024

This paper analyzes the impact of social media and Internet in relation to health and COVID-19 in Puerto Ricans from the Information Society perspective, including the impact on patient-to-doctor relationship and health services demand, impact on patient-to-patient relationship, knowledge and understanding of information and Internet impact factors in relation to health. An online survey of 124 cases confirmed its effects on the doctor and patients. Keywords: social media, doctor, patient, Internet, COVID-19
Exploring the Role of Urban Design Development in Enhancing and Promoting Tourism of Historical Sites: The Case Study of Amman Citadel
Authors: Matrouk Rania
Published: May 2024

Urban design development can play a vital role in enchaining and promoting tourism, by improving the physical infrastructure and creating a more pleasant and attractive environment for visitors. In this context, this paper discusses how urban design development can play a crucial role in increasing and promoting the tourism of historical sites. The paper focuses on the Amman Citadel site and analyses the challenges facing visitors and tourists. The study aims to highlight the possible urban strategies to develop the surrounding areas to increase site tourism. The study adopts an analytical case-study method by conducting a comprehensive literature review to build a theoretical framework, followed by analysing the site through observation and urban analysis. The goal is to propose a strategic plan based on urban design criteria for developing the surrounding areas and enhancing the site's touristic value. The study pointed out the importance of urban design as a key to increasing and promoting tourism as a whole and local tourism as a part. Furthermore, it set several recommendations to apply to the Amman Citadel area to enable its urban tourism development. Keywords: urban design, tourism, urban tourism, Amman Citadel
La masacre hecha figura: un acercamiento a los usos y apropiaciones de las Siluetas de Margarita Belén
Authors: Delgado Facundo Omar
Published: May 2024

El artículo analiza los usos y apropiaciones de las Siluetas de Margarita Belén, imágenes pintadas por primera vez en 1984 por el artista, escritor y ex detenido político, Miguel Ángel Molfino, orientadas a inscribir la memoria de las víctimas y de la masacre de Margarita Belén en el espacio público de Resistencia, Chaco. Este acontecimiento visual adquirió una gran potencialidad para la activación y reelaboración del recuerdo de la represión durante la última dictadura cívico-militar, por lo que las Siluetas de Margarita Belén fueron -y son- estrategias de representación que, fragmentaria y heterogéneamente, inscribieron la memoria de la masacre y sus víctimas.
En este sentido, se reflexiona acerca de la rápida incorporación de estas imágenes en la militancia de los derechos humanos, lo que las llevó a ser plasmadas en registros visuales de distintos formatos: muros, revistas, afiches, invitaciones a conmemoraciones y hasta resultar ser objeto de políticas de memoria. Para esto, buscamos, por un lado, reconstruir algunas instancias de producción, apropiación y reproducción de estas imágenes a través de distintos soportes y contextos desde 1984 y, por otro, indagar los modos en que estas formas visuales abrieron el presente y cada época para permitir la irrupción del pasado traumático.
Jabonería social del programa Espuma, una estrategia institucional participativa en el Museo Castagnino-Macro (Rosario, Argentina)
Authors: Panozzo Zenere Alejandra Gabriela
Published: May 2024

El presente trabajo se propone analizar el estudio de caso llamado Jabonería social, del programa Espuma, que tuvo lugar en el Museo Castagnino-Macro (Rosario, Argentina), con el fin de reflexionar en torno a cierto anhelo de trasformación social al que aspiran, en los últimos años, los museos de arte. Para ello, nos valemos de una perspectiva teórico-metodológica interdisciplinar, de corte descriptivo-analítico, que nos permite pivotear, por un lado, entre visiones que articulan lo artístico, lo social y lo ambiental y, por otro, atender la complejidad de los mandatos que forman parte de la dinámica actual de las sedes museales al proyectarse como mediadoras para el desarrollo sostenible, ciudadano, social y ambiental.
Engineering support of mating surfaces operational properties in the compound forming tool elements with regard to specified pressmold life
Authors: Polskiy Evgeniy , Abramov Roman
Published: May 2024

Design and technological concepts are viewed at the stages of designing, manufacturing and joining process providing for the required reliability (durability) of mold elements. Recommendations are given for rationing and achieving the parameters of accuracy and quality of mating surfaces, taking into account the formation of the necessary operational properties at the main stages of the product life cycle. The factors that have the greatest impact on ensuring the correct and accurate location of forming tool elements have been elicited. The concept of determining the actual contact area and calculating the scale parameter, which provides a contact interface degree specification for conjugated surfaces, is presented. The hypothesis of the formation of reliability indicators is found, taking into account the manufacturing capability and technical capacity of production with the introduction of correction of the upper and lower dimensional deviations included in the dimension chains and ensuring the pre-set accuracy parameters of the master link.
The analysis of the operating conditions of the studied type of pressmold elements is carried out. The main operational properties that provide the required operating time for shaping part failures are identified and analyzed. Special attention is paid to the study of the structural features of such parts, a comparison of the integral and prefabricated structures is made, and also, contact stresses under the joining operation for the most promising of the latter are calculated for contact interface degree simulation. This will allow developing practical recommendations for any type of compound forming tool for the benefit of basic mechanical properties rate making, accuracy indicators, including deviation allowances in the correct geometric shape, including quality parameters of the surface layer at the designing stage,processing methods dispatch and modes setting at the manufacturing and testing stages and also suggesting the amount of static loading when assembling.
Analisis Penggunaan Listrik PLN di Jawa Timur Menggunakan Algoritma K-Medoids
Authors: Hafiizh Muhammad , Prasetyo Muchamad Wahyu , Prasetya Didik Dwi
Published: May 2024

Listrik merupakan kompoen penting dalam kehidupan sekarang dan masa yang akan datang, untuk meningkatkan efisien produksi listrik di masa mendatang, maka perlunya dilakukan pengolahan data dari tahun tahun sebelumnya. Dalam pengolahan data ini peneliti mempunyai tujuan untuk melakukan forecasting kebutuhan listrik dimasa mendatang di Provinsi Jawa Timur, selain kebutuhan listrik harapannya peneliti dalam melakukan forecasting pada listrik terjula, jumlah data terpasang dan pelanggan listrik. Dalam melakukan forecasting peneliti menggunakan metode K-Medoids dalam pengelompokan (Clustering) Produksi Listrik, Listrik Terjual, Data Terpasang, dan Jumlah Pelanggan di Provinsi Jawa Timur. Dari data pengelompokan tersebut diperoleh 3 cluster, yaitu cluster rendah terdiri dari 2 data dan kota, cluster sedang terdiri dari 23 data dan kota, cluster tinggi terdiri dari 25 data dan kota. Diharapkan dengan adanya forecasting dapat meningkatkan efisiensi dalam penggunaan dan produksi listrik dimasa mendatang sehingga listrik dapat terus tersedia dalam keberlangsungan hidup manusia.
Penerapan MVVM (Model View Viewmodel) pada Pengembangan Aplikasi Bank Sampah Digital
Authors: Alfathar Muhammad Ibra , Pamungkas Banis Cipta , Darwaman Bangun Sucipto , Syafei Achmad Farez , Dwinanto Muhammad Rizaldi , Ghifari Muhamad Aldyn , Septiani Ni Wayan Parwati , Lestari Mei
Published: May 2024

Pengembangan aplikasi Bank Sampah Digital telah menjadi fokus utama dalam upaya meningkatkan kesadaran lingkungan dan mempromosikan praktik daur ulang secara efisien. Dalam rangka meningkatkan kinerja dan kualitas perangkat lunak, penerapan pola arsitektur menjadi penting. Salah satu pola arsitektur yang mendapat perhatian adalah Model View ViewModel (MVVM). Penelitian ini mengeksplorasi penerapan pola arsitektur MVVM pada pengembangan aplikasi Bank Sampah Digital. Melalui pendekatan eksperimental, aplikasi prototipe dikembangkan menggunakan teknik-teknik MVVM dan dibandingkan dengan pendekatan pengembangan tradisional. Hasil penelitian menunjukkan bahwa penerapan MVVM secara signifikan meningkatkan keterpisahan antara tampilan (view) dan logika bisnis (model), memungkinkan pengembang untuk mengelola kode dengan lebih efisien dan memperbaiki skalabilitas serta maintainability aplikasi. Selain itu, pengujian fungsional dan performa menunjukkan bahwa aplikasi yang dikembangkan dengan pola MVVM menghasilkan kinerja yang lebih baik dan lebih responsif dibandingkan dengan pendekatan konvensional. Temuan ini memberikan landasan yang kuat bagi pengembang perangkat lunak untuk mengadopsi pola arsitektur MVVM dalam pengembangan aplikasi Bank Sampah Digital dan aplikasi serupa lainnya, dengan harapan meningkatkan efektivitas dan daya tarik pengguna serta memberikan kontribusi positif terhadap upaya pelestarian lingkungan.
Sistem Pakar Diagnosa Penyakit Lambung dengan Metode Forward Chaining
Authors: Pangestu Afghan Eka , Sukmana Yudika Fajar , Handyka Handyka , Ramadhany Zaky Dzimmatillah , Aji Ari Purnomo , Agustin Venny , Safitri Melianda , Chasanah Dwi Fitriani Nur , Septiani Ni Wayan Parwati , Lestari Mei
Published: May 2024

Kami melakukan penelitian yang didasarkan pada sistem yang kami butuhkan untuk dapat melakukan diagnosa penyakit didasarkan gejala yang ada, terutama penyakit yang berkaitan dengan lambung. Karena itu, kita sangat membutuhkan sistem yang dapat meniru cara berpikir seorang ahli. Sistem pakar adalah sistem yang menggabungkan pengetahuan manusia ke dalam pemrograman komputer untuk membuat masalah seperti diagnostik dan masalah medis lebih mudah dipecahkan. Bahasa pemrograman Laravel dan database MySQL digunakan untuk membuat aplikasi sistem pakar ini. Penelitian ini hanya membahas penyakit lambung seperti maag (gastritis), dispepsia, gerd (refluks gastroesophageal), kanker lambung, penyakit usus besar, dan gastroparesis. Orang dewasa berusia 30 tahun ke atas paling sering mengalami gejala kanker lambung stadium awal, dan 80% di antara pasien dengan usia 40 tahun lanjut memiliki riwayat penyakit lambung sebelumnya. Metode Forward Chaining, yang digunakan peneliti dalam penelitian ini, adalah sistem yang telah dilatih untuk mengidentifikasi gejala penyakit tertentu memungkinkan pengguna mengetahui secara pasti jenis penyakit yang mereka derita dan memberikan informasi tentang gejalanya.
Sistem Informasi Simpan Pinjam pada Koperasi PT Pesona Putra Perkasa Jakata Pusat
Authors: Adha Muhammad Faisal , Kustian Nunu
Published: May 2024

PT Pesona Putra Perkasa  bergerak dibidang jasa, khususnya tenaga Outsourching serta perdagangan Nasional dan Internasional belum memiliki sistem informasi koperasi yang dapat membantu anggota-anggotanya untuk mensejahterakan seluruh anggotanya. Koperasi tersebut masih berjalan dengan sistem konvensional dari menyimpan dana, pinjaman, maupun angsuran dari anggotanya serta yang sudah di proses. Penerapan koperasi PT Pesona Putra Perkasa ini sudah baik, namun jika diteruskan akan kemungkinan terjadi hambatan dan kendala setiap transaksi maupun data bertumpuk. Penelitian ini menggunakan pendekatan secara analisis kualitatif yang bertujuan untuk memahami suatu situasi pada koperasi yang meliputi peran, persepsi, dan pendapat. Penelitian ini juga lebih menekankan pada pendataan, transaksi, dan perhitungan angsuran yang diwujudkan dengan menjelaskan penelitian tersebut. Sistem Informasi Simpan Pinjam Pada PT Pesona Pura Perkasa Jakarta Pusat ini ditujukan untuk mempermudah proses transaksi koperasi di PT Pesona Putra Perkasa baik mendata anggota, simpanan, pinjaman, angsuran, laporan maupun bukti nota pembayaran. Sehingga penginputan data lebih menghemat waktu dalam mendata perhitungan transaksi.
Sistem Informasi Penyewaan Lapangan dan Peralatan Badminton pada GOR Pangestu Berbasis Java
Authors: Prasetyo Helmi Budi , Izzatillah Millati , Dwitiyanti Nurfidah
Published: May 2024

GOR Pangestu, merupakan tempat olahraga yang bergerak di bidang jasa penyewaan lapangan badminton, yang berada di Jl. Cikunir Raya. Gg. Swadaya No.85 gedung tersebut lebih dikenal atau bernama GOR Pangestu. Tujuan penelitian ini adalah untuk merancang aplikasi penyewaan lapangan badminton berbasis Java Netbeans agar memudahkan alur penyewaan dan penjualan, transaksi  yang sebelumnya dilakukan secara manual menjadi terkomputerisasi dimana pencatatan dan transaksi akan berubah menjadi pengolahan data yang efektif dan efisien. Dalam membuat aplikasi tersebut menggunakan metode R&D yaitu metode penelitian yang menghasilkan suatu produk tertentu dan mengembangkanya melalui pengujian sehingga produk tersebut dapat dipertanggungjawabkan. Adapun metode pengembangan sistem yang digunakan untuk menyelesaikan penelitian ini adalah metode waterfall.  Hasil penelitian ini adalah memudahkan kasir dan juga owner dalam mengelola usaha penyewaan lapangan badminton dan juga transaksi, sehingga alur pada penyewaan lapangan dan penjualan peralatan dapat menjadi lebih baik.
Perancangan Sistem Informasi Penjualan Barang pada Toko Liga Beras Berbasis Android
Authors: Permatasari Claudia Felicia , Parulian Dudi , Asma Fery Rahmawan
Published: May 2024

Sistem informasi penjualan sangatlah membantu meringankan banyak aktivitas jual-beli baik itu untuk perusahaan besar maupun UMKM seperti Toko Liga Beras. Toko Sembako yang terletak di wilayah Kecamatan Jatisampurna ini setiap harinya masih melayani puluhan pelanggan menggunakan sistem manual yaitu dengan melakukan pencatatan setiap data transaksi kedalam buku besar. Namun hal tersebut dinilai kurang efektif karena seringkali pemilik toko menjumpai beberapa kekeliruan data transaksi yang sulit untuk dilacak, terlebih ketika pelanggan datang secara bersamaan di waktu-waktu tertentu. Kontrol terhadap ketersediaan stok barang secara berulang juga membuat proses pelayanan menjadi lebih lambat karena setiap pegawai harus mengecek stok barang setiap kali pelanggan menanyakan ketersediaan barang tertentu. Melalui penelitian kualitatif berupa wawancara, observasi lapangan, serta studi pustaka, penulis berupaya membangun sistem informasi penjualan barang berbasis android yang bertujuan memudahkan pelayanan penjualan di Toko Liga Beras seperti : manajemen informasi stok barang, rekap data transaksi secara otomatis, serta laporan penjualan yang bisa diterbitkan kapan saja. Dengan adanya sistem yang terintegrasi, segala fasilitas yang berkaitan dengan kegiatan jual-beli dapat diakses oleh penjual maupun pembeli secara fleksibel melalui ponsel. Harapannya, kinerja pelayanan penjualan di Toko Liga Beras akan meningkat sehingga kualitas dan mutu toko menjadi lebih baik.
Sistem Informasi Penjualan Di Toko Basecomp Harco Mangga Dua Jakarta Pusat Berbasis Java
Authors: Limbong Laurentzho Mario , Trinoto Andreas Adi , Tama Bayu Jaya
Published: May 2024

Tujuan penelitian yang dilakukan oleh peneliti adalah untuk merubah sistem penjualan pada toko Basecomp Harco Mangga Dua  yang masih manual menjadi sistem penjualan berbasis Java Netbeans. Hal ini sering menimbulkan kesalahan dalam metode penelitian yang digunakan dalam analisa dan perancangan aplikasi penjualan berbasis java ini adalah deskriptif kualitatif. Dalam melakukan penelitian ini, peneliti menggunakan metode waterfall dalam proses pengumpulan data yang dibutuhkan dan studi lapangan melalui wawancara untuk mendapatkan data dan informasi yang lebih akurat. Berdasarkan hasil analisa data yang telah dilakukan, diperoleh kesimpulan bahwa toko Basecomp Harco Mangga Dua membutuhkan adanya sistem penjualan berbasis Java netbeans dan Mysql yang terintegrasi dengan sistem informasi agar memudahkan admin melakukan penjuala dan pencetakan laporan yang akurat diharapkan dapat meningkatkan kualitas kerja.
Sistem Pendukung Keputusan Penerimaan Karyawan Menggunakan Metode SAW pada Salon Geum Nails
Authors: Terry Jason , Mustari Dewi , Azwar Hanifah
Published: May 2024

Penerimaan karyawan merupakan salah satu kegiatan pengelolaan sumber daya manusia. Pada Salon Geum Nails, penerimaan karyawan masih dilakukan secara subjektif, manual, tidak efisien, dan belum menggunakan sistem pendukung keputusan. Tujuan penelitian ini adalah untuk merancang sistem pendukung keputusan penerimaan karyawan pada Salon Geum Nails dan memberikan hasil penerimaan karyawan yang objektif, efektif, dan efisien dengan mengimplementasikan metode Simple Additive Weighting (SAW) pada aplikasi sistem pendukung keputusan penerimaan karyawan pada Salon Geum Nails. Metode penelitian yang digunakan adalah metode penelitian kualitatif. Algoritma yang diimplementasikan ke sistem adalah Simple Additive Weighting (SAW). Hasil penelitian yang didapatkan adalah aplikasi sistem pendukung keputusan penerimaan karyawan dengan mengimplementasikan metode Simple Additive Weighting (SAW) yang dapat membantu penentuan karyawan baru pada Salon Geum Nails.
Sistem Pakar Diagnosa Penyakit Kulit pada Manusia dengan Menerapkan Metode Forward Chaining
Authors: Putra Muhammad Daffa Ario , Baihaqie Ardhi Dinullah , Irawan Ari
Published: May 2024

Kesehatan menjadi prioritas utama dalam hidup, namun masih banyak orang yang mengabaikan kesehatannya terutama kesehatan kulit. Kulit manusia memiliki fungsi utama untuk melindungi organ tubuh bagian dalam dari paparan zat berbahaya dari luar. Menjaga dan merawat kesehatan kulit menjadi hal yang sangat penting agar terhindar dari berbagai penyakit kulit. Banyak faktor yang menjadi penyebab munculnya penyakit pada kulit, sehingga perlu dilakukan pemeriksaan ke dokter. Keterbatasan waktu serta banyaknya jumlah pasien yang ditangani dokter dan masih kurangnya pemahaman masyarakat mengenai kesehatan kulit mejadi kendala untuk mengidentifikasi penyakit kulit. Maka dari itu diperlukan sebuah aplikasi berupa sistem pakar yang mampu untuk mendiagnosis penyakit kulit dengan lebih cepat. Sistem pakar dibuat dengan menerapkan metode forward chaining yang digunakan sebagai pendekatan dalam melakukan kontrol inferensi. Bahasa pemrograman yang digunakan adalah PHP dan MySQL sebagai penyimpanan data. Hasil dari penelitian ini berupa sistem pakar yang dapat digunakan oleh pengguna untuk diagnosa awal penyakit kulit disertai cara penanganan dan pencegahan
Kesalahan Penggunaan Huruf dan Penulisan Unsur Serapan pada Rubrik Entertainment dalam Portal Media Daring JawaPos.com dan Implikasinya terhadap Pembelajaran Bahasa Indonesia
Authors: Qur’ani Nuzulul , Prameswari Jatut Yoga , Susanti Dewi Indah
Published: May 2024

Tujuan Penelitian ini adalah untuk menganalisis, mengetahui dan mendeskripsikan kesalahan penggunaan huruf dan penulisan unsur serapan pada rubrik entertainment dalam portal media daring JawaPos.com dan implikasinya terhadap pembelajaran bahasa Indonesia. Penelitian ini menggunakan metode kualitatif deskriptif dengan pendekatan kualitatif. Teknik penelitian yang digunakan adalah teknik analisis isi (content analysis text). Hasil penelitian kesalahan penggunaan huruf dan penulisan unsur serapan, penulis menemukan kesalahan penggunaan huruf pada huruf kapital sebanyak 10 data (10%), huruf miring sebanyak 86 data (90%), sedangkan kesalahan penulisan unsur serapan pada serapan umum sebanyak 12 data (80%), dan serapan khusus sebanyak 3 data (20%). Penulis beranggapan bahwa kesalahan yang paling dominan mengalami kesalahan adalah huruf miring pada setiap kata sebab kurangnya ketelitian, dan literasi pada seorang jurnalis JawaPos.com dalam membaca dan menulis.
Pengaruh Penggunaan Metode Talking Stick terhadap Kemampuan Berpidato Ditinjau dari Minat Berpidato pada Peserta Didik Kelas IX di SMP I Assholihiyah
Authors: Ma’rif Muhammad Ramdon Samsul , Nuryani Rina , Putri Helmalia
Published: May 2024

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan metode talking stick terhadap kemampuan berpidato ditinjau dari minat berpidato pada peserta didik kelas IX SMP I Assholihiyah. Metode yang digunakan dalam penelitian ini adalah kuantitatif. Pengumpulan data dilakukan dengan menggunakan teknik pengumpulan data observasi, RPP, angket dan tes. Responden penelitian ini adalah seluruh peserta didik kelas IX. Kelas tersebut terdiri dari dua kelas, yaitu kelas eksperimen dan kelas kontrol yang berjumlah 32 responden, sehingga metode pengambilan sampel yang digunakan dalam penelitian ini adalah sampel total. Berdasarkan hasil penelitian uji homogenitas uji F diperoleh Fhitung (1,4705882) < Ftabel (2,4034471) yang berarti H0 diterima dan H1 ditolak. Hal ini menunjukkan bahwa data kemampuan berpidato bersifat homogen. Hasil uji anova dua faktor menunjukkan Fhitung (4,565303) > Ftabel (4,195972). Artinya H1 diterima dan H0 ditolak. Dengan demikian, terdapat pengaruh penggunaan metode talking stick terhadap kemampuan berpidato ditinjau dari minat berpidato pada peserta didik kelas IX SMP I Assholihiyah.
Eksistensi Budaya Tradisi Buka Palang Pintu dalam Masyarakat Betawi
Authors: Jayakandi Jayakandi
Published: May 2024

Tujuan dari penelitian ini adalah untuk menganalisis eksistensi budaya tradisi palang pintu dalam acara pernikahan masyarakat Betawi. Metode penelitian yang digunakan untuk menganalisis eksistensi budaya tradisi palang pintu  dalam masyarakat Betawi adalah menggunakan metode deskriptif kualitatif dengan teknik wawancara. Berdasarkan hasil penelitian diketahui dari 30 responden yang telah diwawancarai oleh peneliti, terdapat 20 responden yang masih menggunakan budaya tradisi palang pintu dalam acara pernikahan. Hal ini berarti budaya tradisi palang pintu masih sering digunakan oleh masyarakat asli Betawi. Perkembangan zaman pada saat ini yang merupakan zaman modern, tidak membuat masyarakat asli Betawi berhenti untuk menjaga dan mencintai budaya khususnya budaya tradisi palang pintu. Artinya, eksistensi budaya Betawi masih tetap terjaga dalam lingkungan masyarakat asli Betawi. Disadari atau tidak, globalisasi dan maraknya multikulturalisme di ibu kota saat ini menggerus eksistensi budaya Betawi. Maka dari itu, untuk melestarikan nilai-nilai budaya Betawi yang diwariskan nenek moyang, perlu diantisipasi sejak dini dengan solusi yang tepat untuk mempertahankan kebudayaan Betawi.
Simplifikasi Pembuatan Esai Opini Mahasiswa melalui Teknik Penulisan Argumentasi Induktif
Authors: Rosadi Nicky , Utama Wahyu
Published: May 2024

Penelitian ini bertujuan untuk mengungkapkan simplifikasi pembuatan esai opini mahasiswa melalui teknik penulisan argumentasi induktif. Metode yang digunakan dalam penelitian ini yaitu metode kualitatif dengan teknik analisis deskriptif. Subjek dalam penelitian ini ialah mahasiswa yang mengikuti mata kuliah Penulisan Ilmiah. Adapun yang menjadi objek dalam penelitian ini yaitu persepsi mahasiswa terkait proses pembuatan esai opini setelah mereka memiliki pengetahuan terkait teknik penulisan argumentasi induktif. Hasil dalam penelitian ini menunjukkan bahwa teknik penulisan argumentasi induktif dapat mempermudah mahasiswa dalam memahami proses pembuatan esai opini. Hal ini dibuktikan dengan nilai survei yang menunjukkan dari 287 mahasiswa, sebanyak 130 (45,3%) mahasiswa mengaku setuju teknik penulisan argumentasi induktif dapat mempermudah mereka dalam pembuatan esai opini. Sebanyak 113 (39,4%) mahasiswa bahkan menyatakan sangat setuju bahwa teknik penulisan argumentasi induktif dapat mempermudah mereka dalam pembuatan esai opini. Melalui teknik penulisan argumentasi induktif, mahasiswa memiliki gambaran terkait proposisi substantif esai opini mereka. Proposisi substantif yang dimaksud meliputi: 1) pendahuluan, 2) pemaparan bukti/fakta/data, dan 3) penutup yang berisi argumentasi/opini/pendapat/pernyataan. Berdasarkan penelitian yang dilakukan dapat disimpulkan bahwa sebenarnya kerumitan dalam penulisan ilmiah terjadi karena tidak adanya gambaran pola/struktur kompositif (proposisi substantif) pada karya ilmiah yang hendak dibuat. Pengedukasian terkait proposisi substantif terhadap karya ilmiah yang hendak dibuat menjadi hal yang perlu dilakukan serta perlu menjadi perhatian bagi para pengajar sebelum meminta peserta didiknya membuat sebuah karya ilmiah.
Investigation of the Presence and Prevalence of Listeriosis in Clinical Samples in Van and its Region
Authors: Akar Kadir , Sanioğlu Gölen Gökçenur , Babaoglu Ali Riza , Ekin İsmail Hakkı
Published: May 2024

Listeriosis is an infection that causes abortion in humans and various animals worldwide. The causative agent is spread by livestock faeces, especially ruminants, and has a zoonotic character, transmitted by ingesting contaminated silage and feed. In this study, it was aimed to investigate the presence of Listeria spp. in 120 samples (79 abortion material, 41 brain material) of sheep. For this purpose, the polymerase chain reaction (PCR) method was performed using specific oligonucleotide pairs for Listeria spp. all of the abortion materials from Van province and its districts were found to be negative. However, a total of 2 (4.87%) samples, one each from the Erciş and Gevaş districts, from sheep with clinical nervous symptoms were found positive. As a result, it was determined that Listeria spp. was sporadic in Van province. It was concluded that this situation may be due to the low use of silage in ovine breeding in Van province. It was thought that periodical studies should be carried out to determine the course of the disease in the region.
Municipal Political Representation and Housing Affordability
Authors: Rivard Alexandre , Lucas Jack
Published: May 2024

Housing affordability has become a pressing issue in many communities, and municipal governments play a critical role in shaping the character and quantity of local housing supply. At present, however, we know little about the extent to which municipal politicians are equipped to represent their constituents’ preferences on housing supply and housing affordability. In this paper, we combine a nationally representative survey of Canadians with a survey of more than 700 mayors and councillors in municipalities across Canada to explore (a) the extent to which politicians align with their constituents in their housing policy attitudes and (b) the extent to which politicians' views are more representative of more privileged local residents, such as homeowners. Across nine concrete housing policy proposals, we find strong evidence of macro-level policy representation: when local communities are more supportive of a housing policy proposals, local politicians tend to be more supportive as well. We also find that politicians' attitudes on housing are not more aligned with privileged local residents; instead, elite-mass alignment is primarily shaped by ideological congruence. These findings suggest that slow progress on housing policy is driven not by policy misalignment between politicians and citizens, but instead by patterns of local mobilization and "neighborhood defender" behavior.
Cognitive Predictors of Perception and Adaption to Dysarthric Speech in Older Adults
Authors: Lansford Kaitlin L. , Hirsch Micah E. , Barrett Tyson S. , Borrie Stephanie A
Published: May 2024

Purpose: In effortful listening conditions, speech perception and adaptation abilities are constrained by aging and often linked to age-related hearing loss and cognitive decline. Given that older adults are frequent communication partners of individuals with dysarthria, the current study examines cognitive-linguistic and hearing predictors of dysarthric speech perception and adaptation in older adult listeners.Method: Fifty-eight older adult listeners (aged 55 to 80) completed a battery of cognitive and hearing tasks administered via the National Institutes of Health (NIH) Toolbox. Participants also completed a three-phase familiarization task (pretest, training, posttest) with one of two speakers with dysarthria. Elastic net regression models of initial intelligibility (pretest) and intelligibility improvement (posttest) were constructed for each speaker with dysarthria to identify important cognitive and hearing predictors.Results: Overall, the regression models indicated that intelligibility outcomes were optimized for older listeners with better hearing, vocabulary knowledge, working memory capacity, and cognitive flexibility. Despite some convergence across models, unique constellations of cognitive-linguistic and hearing parameters and their two-way interactions predicted speech perception and adaptation outcomes for the two speakers with dysarthria, who varied in terms of their severity and perceptual characteristics.Conclusions: Here, we add to an extensive body of work in related disciplines by demonstrating age-related declines in speech perception and adaptation to dysarthric speech can be traced back to specific hearing and cognitive-linguistic factors.
Situational Aware Access Control to Prevent Android Malware
Authors: Skalski Krzysiek , Dombrokova Katarzyna , Szczawinski Wojciech
Published: May 2024

Android malware poses a significant threat to the security and privacy of users worldwide, requiring advanced protective measures. A novel and significant contribution to Android security, situational aware access control, dynamically regulates access to sensitive functionalities based on real-time behavioral analysis. By integrating machine learning models with detailed user interaction data, the system effectively distinguishes between normal and anomalous behaviors. The implementation of a feedback mechanism allows continuous learning and adaptation, ensuring that the system evolves in response to emerging threats and changing user behaviors. Performance evaluations demonstrated high accuracy, precision, and recall, with minimal impact on user experience. This dynamic approach not only enhances malware detection but also improves user satisfaction by reducing false positives and ensuring seamless interactions. The implications for Android security are profound, offering a resilient and adaptive solution to the growing challenge of malware prevention.
Content based Word Clustering using Feature Similarity based AHC Algorithm
Authors: Jo Taeho
Published: May 2024

This article proposes the modified AHC (Agglomerative HierarchicalClustering) algorithm which considers the feature similarity and isapplied to the word clustering. The texts which are given asfeatures for encoding words into numerical vectors are semanticrelated entities, rather than independent ones, and the synergyeffect between the word clustering and the text clustering isexpected by combining both of them with each other. In thisresearch, we define the similarity metric between numerical vectorsconsidering the feature similarity, and modify the AHC algorithm byadopting the proposed similarity metric as the approach to the wordclustering. The proposed AHC algorithm is empirically validated asthe better approach in clustering words in news articles andopinions. The significance of this research is to improve theclustering performance by utilizing the feature similarities.