bluuebunny/crossref_metadata_2025 huggingface dataset:
KEANEKARAGAMAN DAN PEMANFAATAN JENIS TUMBUHAN OBAT DI KECAMATAN UMBULSARI KABUPATEN JEMBER
Authors: - Riza Rusdiana Firmani
Published: January 2024

Tumbuhan obat banyak dimanfaatkan oleh masyarakat di Kecamatan Umbulsari, masyarakat memiliki pengetahuan yang bervariasi mengenai tumbuhan obat yang memungkinkan ditemukannya manfaat yang sama pada tumbuhan berbeda. Selain itu terdapat permasalahan mengenai masyarakat yang tidak sadar dengan potensi tumbuhan obat di sekitar, tumbuhan obat belum teridentifikasi secara lengkap, terdapat ancaman berupa pola pikir masyarakat yang ingin instan serta cepat dalam pengobatan dengan menggunakan obat kimia, mudahnya mendapatkan obat-obatan kimia, dan rendahnya minat generasi muda terhadap tumbuhan obat di Kecamatan Umbulsari. Penelitian  dilaksanakan bulan Januari-Februari 2022, tujuannya untuk mengetahui jenis-jenis tumbuhan obat dan manfaat tumbuhan obat. Metode penelitian yang digunakan deskriptif kualitatif dengan teknik purposive sampling melalui wawancara semi terstruktur, pengamatan langsung dan dibantu dengan dokumentasi. Hasil penelitian ditemukan sebanyak 67 jenis tumbuhan obat dari 33 famili dengan famili terbanyak yaitu Zingiberaceae yang terdiri dari 8 jenis tumbuhan obat. Bagian tumbuhan obat yang paling banyak dimanfaatkan yaitu daun, dan cara pemanfaatan yang paling banyak digunakan yaitu perebusan. Manfaat tumbuhan obat yang paling banyak digunakan yaitu sebagai obat hipertensi, masalah pencernaan, batuk dan kolesterol.
Determination of Boron Concentration at Sausage Samples with Distillation of Ester Borane Method using Fluorescence Spectrophotometry
Authors: - Isna Lailatusholihah , Aisyiah Restutiningsih Putri Utami  , Micha Mahardika
Published: January 2024

The study of borax contamination in food samples was successfully analyzed. This study used sausage samples using the Fluorescence Spectrophotometry method. Sausage samples were from Daerah Istimewa Yogyakarta (DIY). This study used 4 sausage samples. The samples were given labels A, B, C, and D. The steps of the research were optimation of distillation time, optimation of catalyst, optimation of solvent, and then followed by analyzing the borax concentration on sausage samples. Based on this study, the optimum distillation time was 24 hours. On the other hand, the best catalysts and solvents were sulphuric acid and ethanol. The A and B samples contained borax contamination and the concentration was under 5 ppm. The C and D samples contained borax contamination and the concentration was above 5 ppm. The conclusions were that A and B samples were not given borax addition and C and D samples were given borax addition.
Penggunaan Arang Aktif Ampas Kopi untuk Menurunkan Bilangan Peroksida dan Asam Lemak Bebas (ALB) pada Minyak Goreng Bekas
Authors: Prismawiryanti  , Andarwati Sophia , Syamsuddin
Published: January 2024

The peroxide value and free fatty acid content influence the quality of cooking oil. Activated charcoal from coffee grounds has been used in processing used cooking oil. This research aimed to determine the ratio of coffee grounds activated charcoal adsorbent-to-used cooking oil (w/v) and the optimum contact time to reduce used cooking oil's peroxide and free fatty acid levels. The ratio of adsorbent and used cooking oil was 1:20, 1:10, and 1:5 (w/v) with contact times of 60, 90, and 120 minutes. Coffee grounds charcoal was activated by ZnCl2. A ratio of adsorbent and cooking oil 1:5 (10 g activated carbon and 50 ml cooking oil) reduced the peroxide number from 12 mek/O2 kg to 9.8 mek/O2 kg and free fatty acids from 0.972% to 0.383%. A contact time of 120 minutes could optimally reduce the peroxide number and free fatty acids from 12 mek O2/kg to 9.3 mek O2/kg and 0.972% to 0.332%, respectively. Coffee grounds have the potential to be processed into activated charcoal for refining used cooking oil.
Selekcja zmiennych metodami statystycznymi i uczenia maszynowego. Porównanie podejść na przykładzie danych finansowych
Authors: Grzybowska Urszula , Karwański Marek
Published: January 2024

Zgodnie z nowymi dyrektywami międzynarodowego nadzoru finansowego (MSSF9) banki powinny przyjrzeć się nowemu zestawowi narzędzi analitycznych, takich jak uczenie maszynowe. Wprowadzenie tych metod do praktyki bankowej wymaga przeformułowania celów biznesowych, zarówno w zakresie trafności przewidywań, jak i definicji czynników ryzyka. W artykule porównano metody selekcji zmiennych i przypisania „ważności” w modelach statystycznych i algorytmicznych. Obliczenia przeprowadzono na przykładzie klasyfikacji danych finansowych. Na wybranych zbiorach zmiennych porównano skuteczność różnych algorytmów uczenia maszynowego. Wyniki analiz wskazują na potrzebę rewizji koncepcji „ważności” zmiennej, tak aby nie była ona zależna od struktury modelu.
Czy zmiana standingu finansowego spółek publicznych wpływa na zmiany odsetka kobiet w organach statutowych?
Authors: Witkowska Dorota , Kompa Krzysztof
Published: January 2024

Zwiększenie udziału kobiet w zarządzaniu jest "gorącym" tematem dyskusji. Celem pracy jest sprawdzenie czy zmiana standingu finansowego spółek przekłada się na zmianę frakcji kobiet w ich kierownictwie. Badaniem objęto 90 spółek nieprzerwanie notowanych na GPW w Warszawie w latach 2010-2019. Ocenę sytuacji finansowej spółek przeprowadzono za pomocą syntetycznych miar wektorowych, obliczonych dla danych finansowych raportowanych na koniec każdego roku. Badania nie wykazały występowania zależności potwierdzającej, że wraz ze zmianą sytuacji finansowej spółek ulega zmianie odsetek kobiet w kierownictwie.
Material removal in laser chemical processing with modulated laser power
Authors: Bouraoui Yasmine , Rathmann Lewin , Niehaves Claudia , Mikulewitsch Merlin , Fischer Andreas , Radel Tim
Published: January 2024

Laser chemical machining (LCM) is a method of laser processing based on gentle material removal by means of thermal induced chemical dissolution. Since LCM depends predominantly on the surface temperature of the workpiece, the process window is restricted by the appearance of gas bubbles at higher laser powers and their associated shielding effect. In order to extend the process understanding, the influence of the laser power modulation on the removal behavior is investigated in the present work. The experiments were conducted on titanium grade 1 and with phosphoric acid. Based on the response time in experiments with a single step function of the laser power, a spatial frequency threshold was determined above which a constant removal depth could be expected. Afterward, the laser power was modulated rectangularly in time, resulting in combination with the process velocity in different spatial modulation frequencies varying from 1 to 20 mm−1. The investigations showed that the removal cavity exhibited sinusoidal oscillation in depth along the machining direction with a spatial frequency corresponding to the spatial frequency of the laser power. When the spatial frequency exceeds the determined threshold frequency, the cavity depth is constant. This established the basis for generating complex removal profiles by varying the power in the range below the threshold frequency.
Welding between confinements as a new approach for high deposition rate additive manufacturing with laser-assisted double wire welding with nontransferred arc
Authors: Biester Kai , Barroi Alexander , Schwarz Nick , Hermsdorf Jörg , Kaierle Stefan
Published: January 2024

Laser-assisted double wire welding with nontransferred arc uses an electric arc to melt two welding wires fed toward each other. The molten material drips onto the substrate, where it is joined to the substrate without undercuts by means of oscillated laser radiation. The process offers possibility of creating structures with high deposition rates (8.4 kg/h), but faces challenges in fulfilling the requirements for surface properties and geometric accuracy. One approach to meet the requirements is to confine the final seam geometry by applying the melt into a mold. Such a confinement can be a wall previously applied by a process with higher geometric accuracy. An investigation of this approach was carried out by studying the deposition of mild steel weld beads within two confining structures, in this case, a groove. A particular interest in the evaluation is connection of the weld bead to the base material in the corners, the bottom surface, and the side surface of the groove. In the first step, weld beads are deposited in 12 mm wide grooves in a mild steel substrate with variable laser beam oscillation amplitudes of 10–13 mm. In the second step, several layers are deposited with variable welding speeds. The oscillation amplitude that generates the best connection in the corners is 13 mm. Bonding on the bottom and side surfaces could be achieved with all parameter sets. When applying several layers, the best lateral connection in the groove was produced with a welding speed of 200 mm/min.
gázturbinás repülőgép-hajtóművek fejlesztési irányai 4. rész
Authors: Varga Béla
Published: January 2024

A szerző tanulmányában bemutatja a propulziós rendszerek működését, a tolóerő keletkezésének összefüggéseit, ezen belül részletesen foglalkozik a gázturbinás propulziós rendszerek típusaival és szerkezeti kialakításukkal. Tárgyalja a hajtóművek hatásfokát meghatározó tényezőket, a hatásfok növelésével kapcsolatban az azokban rejlő lehetőségeket és korlátokat, valamint a hatásfok és a klímaváltozás jelentősége miatt is fontos szén-dioxid-kibocsátás összefüggéseit. Ismerteti a nemzetközi légiforgalmat érintő, a szén-dioxid-kibocsátás csökkentésére irányuló intézkedéseket, és hogy azok milyen kihívásokat jelentenek a repülőgép-hajtóművek fejlesztése szempontjából. Vizsgálja az alternatív tüzelőanyagok alkalmazásának lehetőségét, valamint azok a hajtómű termikus hatásfokára, és fajlagos hasznos munkájára kifejtett hatását. Foglalkozik a gázturbinás hajtóművek égőtereinek kialakításával, kémiai, termodinamikai és gázdinamikai kérdéseivel, valaminta keletkező égéstermék összetételével.
Katonai műszaki-technikai újdonságok a MILENG COE 2022-es ipari napján 2. rész
Authors: Bakos Tamás
Published: January 2024

A németországi Ingolstadtban, a NATO Katonai Műszaki Kiválósági Központ minden esztendőben megrendezi a Katonai Műszaki Információs Szemináriumot. Az esemény keretén belül az „Ipar Napja” rendezvényen az érdeklődők megismerkedhetnek a különböző gyártók, fejlesztők legújabb katonai műszaki és mérnöki ágazathoz kapcsolódó termékeivel. A szerző célja, hogy néhány kiválasztott műszaki innováción keresztül felkeltse az érdeklődést mind a műszaki-technikai eszközök új generációja, mind a műszaki támogatás új lehetőségei iránt.
Lynx harcjármű fegyverzete és védelmi rendszerei
Authors: Végvári Zsolt , Sebők István
Published: January 2024

A Lynx harcjármű a saját kategóriájában kimagasló passzív páncélvédelemmel rendelkezik, és korszerű hajtáslánca révén mozgékonysága is megfelelő. A szerzők tanulmányukban bemutatják a harcjármű fegyverzetét, amely lehetővé teszi, hogy a Lynx a legnehezebb harci körülmények között is képes legyen a lövészrajok támogatására, továbbá azokat a védelmi rendszereket, amelyek hozzájárulnak a harcjármű és személyzete túlélőképességének növeléséhez.
Linear and Non-linear Regression Methods to Study the Adsorption of Cr(VI) from an Aqueous Solution Using Pomegranate Peel
Authors: Abdullah Salah M. , Alwan Aseel F. , Majeed Atheer M. , Abdalgader Enageh T. A.
Published: January 2024

In this study, the previous data of the adsorption of Chromium (VI) ions on the pomegranate peels (MPGP) as adsorbents were used. linear and non-linear equations for Langmuir, Freundlich, Dubinin-Radushkevich, Tempkin, Redlich-Peterson, Sips, and Toth adsorption isotherm models were applied. The five error functions ERRSQ, HYBRD, MPSD, ARE, and EABS were analyzed for non-linear isotherm equations and in each case a set of isotherm parameters were determined. The algorithms for the simulation of linear and non-linear isotherm models using error functions were achieved with the aid of Microsoft Excel solver Add-Ins for minimizing the respective error function across the concentration range studied. Linear and non-linear methods show comparable data for two-parameter models, also high R2 values were obtained for Langmuir, Freundlich, and Temkin models while the Dubinin-Radushkevich model reveals low R2 values, on the contrary, three-parameter models show different data between linear and non-linear methods with high R2 value for all. Which indicates that the error does not obey the Gaussian distribution.
Features of the Kinetics of the Fenton Reaction
Authors: IM Piskarev
Published: January 2024

The Fenton reaction is of considerable interest due to the fact that it can be applied in chemical, biochemical and biomedical research. The Fenton reaction makes it possible to estimate the content of hydroperoxides. Hydroperoxides in a large number of cases are the trace that remains after the occurrence of redox reactions. To perform such studies, it is necessary to know the characteristics of the reaction at different ratios between the concentrations of hydroperoxides and ferrous iron. The reaction yield is determined by registering chemiluminescence. The number of oxidation events of ferrous iron N(Fe2+ ® Fe3+) in the Fenton reaction is calculated in this work for the cases [Fe2+] > [H2 O2 ] and [Fe2+] < [H2 O2 ] at concentrations of Fe2+ and H2 O2 ranging from 10-3 to 10-7 mol/L. It is shown that the peroxide concentration can be unambiguously determined only for the case [Fe2+] > [H2 O2 ]. In the case of [Fe2+] < [H2 O2 ], due to a strong decrease in the reaction rate, it is not always possible to register the total chemiluminescence yield. The kinetics of the formation of luminous products in the Fenton reaction after the introduction of luminol has been calculated. Conditions are considered when chemiluminescence with luminol is proportional to the concentration of hydroperoxides. The considered features of the Fenton reaction must be taken into account when performing specific research work.
Electro-Optic Activity of a Non-Ideal One-Dimensional Photonic Structure in the Frequency Vicinity of Excitonic Transition
Authors: VV Rumyantsev
Published: January 2024

The paper is devoted to electro-gyration phenomenon in a non-ideal one-dimensional photonic crystal. One of the sublattices of the considered structure includes randomly distributed foreign layers with embedded point imperfections (vacancies). Electro-gyration effect arises due to the onset of optical activity of defect layers under the action of a constant electric field. We study the dependence of the specific polarization rotation angle of light on concentrations of layer wise and point defects as well as on the light frequency and lattice parameters.
Morocco's Entrepreneurial Landscape and Social Impact Funding Ecosystem During the COVID-19 Pandemic
Authors:   Université Hassan II de Casablanca, Maroc, Bazi Mohamed , Sanaa Mabrouk
Published: January 2024

Many entrepreneurial and other collective initiatives create social impact in addition to economic gains. In this paper, we will discuss these initiatives with a focus on the financing ecosystem that is crucial to these organizations. We first discuss the social and solidarity economy before talking about entrepreneurship and social enterprises. We focus next on cooperatives, which are very important in our context for the impact they contribute to achieve. The topic of the social and solidarity economy (SSE) in Morocco garners extensive attention within economic, political, and academic circles. Given the unique Moroccan backdrop, regional advancements, demographic dynamics, and economic traits, it accentuates considerable social issues and amplifies the significance of SSE entities, especially concerning their target audience. The SSE landscape, comprising a diverse array of organizations, has continually adapted and expanded since the country gained independence to address the distinct features of its environment.
Economic valuation of hydroelectric dams' safety: Evidence from France
Authors:   Cadi Ayyad University, Morocco, Malzi Mohamed Jaouad , Belhaj Naoufel ,   Hassan II University Casablanca, Morocco, Koraich Almahdi ,   Abdelmalek Essaadi University, Tangier, Morocco
Published: January 2024

This paper aims to develop an economic approach that enables electricity generation companies to analyze and quantify the economic gains of complicated activities particularly the safety of hydroelectric dams. The method is based on calculating the costs avoided due to the implementation of safety mechanism. The specification of this method is founded on a solid literature regarding the economic assessment of the monetary value of complicated services. The results of this paper highlight the importance and the significant influence of safety activities in reducing costs, reaching approximately 26 million Euros. The results also shed light on the importance of the safety device to fight fatal accidents and ensure public security.
Investigation of the Development of Tropical Storm Nicholas based on Global and Regional Climate Data
Authors: Wahyuni Intan Nuni , Shabrina Ayu , Lobma Fadhil , Latifah Arnida L.
Published: January 2024

This paper studies the simulation of Cyclone Nicholas that occurred close to the coastal area of Western Australia and fell on the mainland of Southwestern Australia. The simulation was conducted via a dynamical downscaling model, Weather Research and Forecasting (WRF), to obtain a higher resolution with reference to the regional climate data. The model simulation is generated using a global reanalysis of climate data for the initial and lateral boundary conditions. We investigated the response of the tropical storm to the model regarding the track and intensity using a modified Kyklop method that appears more appropriate for a landfall cyclone. Our study suggests that the regional climate data computed by the model deviates from the storm track of the global climate data forcing field. In this study, the track of the simulated storm is parallel to the satellite data, but it is shifted slightly to the east, closer to the mainland. Nevertheless, the model simulation can implement the intensity of the storm as strongly as the observation, while the forcing data delivers substantial underestimation.
The Atmospheric Dynamics Related to Extreme Rainfall and Flood Events during September-October-November in South Sulawesi
Authors: Ulfiana Amhar , Arsyad Muhammad , Palloan Pariabti
Published: January 2024

This study was conducted to analyse the occurrence of extreme rainfall and the dynamics of the atmosphere prior to the occurrence of extreme rainfall and flood events in South Sulawesi during September-October-November (South Sulawesi’s dry season). The data used is daily data for the period 2001-2020. Using 50 mm/day and the 90th percentile rainfall threshold of 119 rain stations distributed over 24 regencies, extreme rainfall events in each region were identified. Furthermore, after screening for extreme rainfall events followed by flood events, a composite analysis was carried out to obtain patterns of atmospheric conditions before the extreme rainfall events. The results of the study confirm that spatially, the highest extreme rainfall indices values dominate in the western and northern regions of South Sulawesi, both frequency and intensity indicators. Flood events in South Sulawesi during September-October-November 2001-2020 were recorded as 23 days, of which 19 days were the flood events after extreme rainfall events. The dynamics of the atmosphere before the extreme rainfall event followed by the flood event showed anomalies in precipitable water, 850 mb winds, and 200 mb winds. An increase in the amount of precipitable water and a wind speed of 850 mb, as well as a decrease in wind speed of 250 mb compared to normal in the South Sulawesi region and its surroundings, has resulted in an increase in the formation of rain clouds that have the potential to increase the chance of extreme rainfall.
Etnomatemática e Etnociência “não presentes” em manuais de professores de ciências e matemática de escolas indígenas xerente no estado do Tocantins
Authors: Rosa Sâmua Nikaelen Eliane , Santos Thalita Fernandes dos , Costa Dailson Evangelista , Melo Elisangela Aparecida Pereira de
Published: January 2024

O objetivo desta investigação é identificar e analisar elementos de Etnomatemática e Etnociência evidenciados em imagens presentes em manuais de professores de Ciências e Matemática destinados às escolas indígenas Xerente no Estado do Tocantins. Para isso, desenvolvemos uma pesquisa qualitativa do tipo documental, considerando como documento o Manual do Professor aprovado pelo Plano Nacional do Livro Didático (PNLD) e escolhido para ser utilizado no ano de 2024, nas disciplinas de Matemática e Ciências da Natureza, em escolas indígenas Xerente, localizadas na cidade de Tocantínia, no estado de Tocantins. O foco das análises foi nas imagens apresentadas nos referidos manuais, considerando três características: a) Imagens de caráter estético; b) Imagens de caráter funcional; e c) Imagens suporte; adotando como base o Interacionismo Sóciodiscursivo (ISD) e direcionando nosso foco para a identificação de indícios dos etnoconhecimentos, que abrangem tanto a Etnomatemática quanto a Etnociência, nas imagens analisadas. Foram 365 (trezentos e sessenta e cinco) imagens analisadas no Manual de Ensino de Ciências e 216 (duzentos e dezesseis) no Manual de Matemática, organizadas em dois grupos: ilustrações e fotografias. Os resultados indicam, entre outros elementos, que existe uma ausência de elementos que configurem abordagens de Etnomatemática e Etnociência evidenciados nas imagens de tal forma que seja representativa da comunidade indígena a utilizar o referido manual.
Simulation of Hybrid Solar Collector Operation in Heat Supply System
Authors:   Lviv Polytechnic National University, Mysak Stepan , Shapoval Stepan , Matiko Halyna
Published: January 2024

The paper focuses on the investigation and the simulation of the efficiency of a hybrid solar collector in a heat supply system consisting of two separate units, namely a heat storage tank and a flat solar collector, which are interconnected by pipelines. The study includes the analysis and calculation of the thermal parameters of the system for one day and the determination of the optimal values of the flow rate of the heat carrier in the solar collector and the mass of the heat carrier in the heat storage tank to achieve maximum thermal efficiency of the system. The authors use SolidWorks software and additional scripts programmed using Python to simulate the operation of the solar collector and to calculate its thermal efficiency. The results of the study show the high potential of hybrid solar collectors for efficient generation and accumulation of thermal energy both for households and small industries. This paper may be useful for engineers and scientists working in the field of alternative energy sources and energy-efficient systems.
Theory and Practice of Temperature Measurement by Thermoelectric Transducers
Authors:   Lviv Polytechnic National University, Fedynets Vasyl , Vasylkivskyi Ihor
Published: January 2024

Temperature is one of the main parameters that determine the quantitative and qualitative indicators of products. Therefore, it is difficult to name a field of technology or a branch of industry where it would not be necessary to measure the temperature of solid, liquid, or gaseous substances. Along with this, it should be noted that in each specific field, the choice of methods and means of temperature measurement is determined by its specificity, which is related to the variety of technological objects, the nature of the process, the physical and chemical characteristics of the environment under investigation, the range of measured temperatures, the requirements for the necessary measurement errors, etc. Therefore, choosing a measurement method for a specific technological object is a difficult task, since it is necessary to take into account a large number of factors that can quite often be contradictory. Thus, liquid-in-glass thermometers make it possible to measure the temperature directly near the technological objects. With the help of manometric thermometers, it is possible to measure the temperature at some distance from the research objects. It should also be noted that such thermometers must be constantly connected to the primary transducer by a connecting capillary. Unlike the above, electric thermometers allow for remote temperature measurements at any distance between the primary transducer and the secondary device. Thermoelectric transducers (thermocouples) and resistance thermotransducers have become the most widely used electric thermometers for industrial applications. This is a review paper and contains information on the features of temperature measurement using thermoelectric transducers (thermocouples).
Model of Gas Turbine Plant with Concentrated Parameters for Analysis of Dynamic Properties Patterns
Authors:   Odesa Polytechnic National University, Yavorskyi Oleksandr , Tarakhtii Olha , Maksymov Maksym , Kryvda Viktoria
Published: January 2024

This article considers a model of gas turbine plants (GTPs) with concentrated parameters for analysing the regularities of the dynamic properties of transients with power changes. The main goal is to study and analyse the dynamic properties of GTPs, in particular their transients, taking into account power changes. To achieve this goal, the task is to develop a universal model based on approximation approaches using concentrated parameters. The key tasks of the article include: development of a mathematical model with concentrated parameters, which takes into account the current rated power of the GTP, investigation of the dynamic properties of the transient processes of the GTP using approximation models, obtaining an approximation dependence that shows the relationship between changes in the dynamic properties of transients and changes in the current power of the GTP. Focusing on the development of a universal model with approximation parameters provides the basis for a detailed analysis of the dynamic properties of GTPs and their behaviour at different power levels. These studies can have practical applications in improving the regulation and optimization of power systems based on gas turbine plants.
Learning Interferometric Equipment through Integration of Game Methods into Mobile Application
Authors:   Lviv Polytechnic National University, Yatsyshyn Svyatoslav , Nazarkevych Ihor
Published: January 2024

The article focuses on the research and development of a mobile application for basic and advanced study of interferometric equipment. Based on modern approaches to education and actual needs of students, the peculiarities of operation with high-precision interferometric equipment were investigated. The article examines the problems associated with studying the interferometry as a discipline: the difficulty of understanding the terminology, the uniqueness of the application base, and the limited number of students. To solve these problems, it is proposed to involve game-based learning methods, which makes the process more immersive and effective. The application, developed on the basis of the Unity platform, aims to make the study of interferometry accessible, interesting and effective, combining theoretical knowledge with practical tasks and game elements.
Investigation of Changes in Main Error of Rotary Gas Meters during Their Operation
Authors:   Lviv Polytechnic National University, Matiko Fedir , Pistun Oleh
Published: January 2024

The main error of rotary gas meters may change during their operation because of mechanical wear of the meter moving parts. Control of changes in metrological characteristics of meters is carried out during periodic metrological verifications. In this paper, an investigation of the change in a main error of rotary gas meters during their operation was carried out based on the results of their metrological verification. The paper considers the results of periodic metrological verifications of rotary gas meters in the laboratories of four gas distribution companies. According to the results of processing the metrological verification protocols, the correlation of the rotary gas meter error with the measured gas volume was confirmed. Based on processing the set of meter error values and the measured gas volume for each of the checked flowrate values, regression dependencies of the error of the meter on the measured gas volume were developed. By averaging the obtained regression dependencies, a generalized dependence of the systematic error of RG-250 rotary gas meter on the measured gas volume was developed. The regression dependencies make it possible to estimate the change in the main error of RG-250 gas meters according to its measured volume and to decide on their additional (out-of-plan) metrological verification. This makes it possible to detect in time gas meters operating with a significant systematic error, and therefore to eliminate this error.
Determination of horizontal deformation of the Earth`s crust on the territory of Ukraine based on GNSS measurements
Authors:   Lviv Polytechnic National University, Doskich Sofiia , Savchuk Stepan ,   Lviv Polytechnic National University, Dzhuman Bohdan ,   Lviv Polytechnic National University
Published: January 2024

The purpose of research is to identify horizontal deformation of the Ukraine territory, using only proven and suitable for geodynamic interpretation GNSS stations. The initial data are observations from 30 GNSS stations for 2017 to 2020. Methodology. The methodology includes the analysis of modern Earth's crust deformations of Ukraine. As a result, for the first time the impact of the coordinates time series created by two different methods: Precise Point Positioning (PPP) and the classical differential method, on determining deformation processes was analysed. It was established that nowadays for the tasks of monitoring, including geodynamic, it is necessary to use the Precise Point Positioning (PPP) method, because the accuracy of determined velocities of the GNSS stations by this method was higher than in the classical differential method. Results. A map of horizontal Earth's crust deformations on the territory of Ukraine was created according to the coordinates time series of GNSS stations. The extension areas of Shepetivka-Starokostiantyniv Khmelnytsky region, Boryspil- Pryluky-Pereyaslav-Khmelnitsky Kyiv and Chernihiv region, as well as a compression area of the Earth's crust in Nizhyn - Stepovi Khutory - Kozelets of Chernihiv region was identified. Additionally, a map of horizontal displacements of the GNSS-stations was created, where the diverse of these displacements was observed, which is likely to be caused by the presence of modern subvertical and sub-horizontal faults and fault areas. For better interpretation of the obtained results, it is necessary to involve geological and geophysical data of tectonic activity of the Ukraine territory.
IMPLEMENTATION OF UI UX ON THE TOKO KUE BUNDA AL SITE USING THINKING DESIGN METHOD
Authors: Edward MA Algifari
Published: January 2024

Abstract. Information and communication technology has developed very rapidly in various fields such as marketing and buying and selling. Technology that is often used by all groups, namely the internet, one of the uses of the internet is to search for information. According to a survey by the Association of Indonesian Internet Service Providers (APJII), around 78.19% or 215.6 million of Indonesia's population already use the Internet and use it for product marketing and buying and selling transactions. In the culinary industry, the use of Internet technology has a significant influence. Reports from Google and Temasek in 2023 show rapid growth in the e-commerce sector in Indonesia. The value of e-commerce transactions is predicted to reach 1,346 trillion rupiahs. In internet media as a means of marketing a product, not all culinary shops can take advantage of this, because of that a solution was made for creating a website that pays attention to users with the design thinking method. Making this cake shop website includes marketing products and providing information related to Bunda AL Cake Shop, the results of this research have been carried out on several respondents who have online shopping experience and several customers of Bunda AL Cake Shop. As a result of the respondents' experience in using the Bunda AL Cake Shop website, 7 out of 8 respondents liked the website appearance design and it was very easy to understand the information provided on the website.
ANALISIS SENTIMEN PENGGUNA APLIKASI SHOPEE PADA SITUS GOOGLE PLAY MENGGUNAKAN NAIVE BAYES CLASSIFIER
Authors: Nurian Andriani , Ma'arif Muhammad Samsul , Amalia Indira Nur , Rozikin Chaerur
Published: January 2024

Perkembangan teknologi dalam era digital ini sangat pesat. Salah satu bidang yang mengalami perkembangan signifikan adalah industri keuangan (fintech). Banyak perusahaan fintech, termasuk Shopee, yang muncul dan menawarkan kemudahan kepada pengguna. Dalam konteks ini, Google Play Store merupakan platform yang memungkinkan pengguna memberikan ulasan terhadap produk yang mereka gunakan. Seiring dengan pertumbuhan jumlah pengguna, jumlah ulasan di Google Play Store juga meningkat. Ulasan dari pengguna dapat menjadi sumber informasi berharga bagi perusahaan untuk melakukan perbaikan dan peningkatan di masa depan. Penelitian ini berfokus pada analisis sentimen terhadap ulasan pengguna aplikasi Shopee di Google Play Store menggunakan algoritma Naïve Bayes. Data ulasan diklasifikasikan ke dalam tiga kategori, yaitu positif, negatif, dan netral. Evaluasi penelitian ini menunjukkan hasil Accuracy sebesar 87,58%, presisi sebesar 91,20%, dan recall sebesar 90,21%. Penelitian ini memberikan kontribusi dalam pemahaman sentimen pengguna terhadap aplikasi Shopee. Dengan menggunakan Naïve Bayes Classifier dan metode seleksi fitur TF-IDF, perusahaan dapat mengklasifikasikan ulasan pengguna dengan lebih efektif. Hasil penelitian ini dapat digunakan sebagai dasar untuk meningkatkan pengalaman pengguna dan kualitas layanan aplikasi Shopee.
PROTOTYPE OF AUTOMATIC WATERGATE MONITORING SYSTEM IN DAMS BASED ON THE INTERNET OF THINGS
Authors: Unsulbar Dahira
Published: January 2024

Abstrak. Bendungan memiliki peran penting untuk kehidupan manusia dan memiliki banyak manfaat penting salah satunya sebagai irigasi dan pengendali banjir. Namun jika terjadi kelalaian dalam pengawasan bendungan tersebut akibatnya sangat merugikan karena menyangkut keselamatan warga di sekitarnya dan dapat mengakibatkan kerusakan lahan pertanian masyarakat jika terjadi peluapan air. Petugas bendung harus bolak balik dari bendungan ke pos jaga untuk membuka pintu air agar kondisi air selalu dalam keadaan normal. Oleh karena itu pada penelitian ini bertujuan untuk membuat sistem monitoring pintu air otomatis pada bendungan berbasis Internet Of Things dan jenis penelitian yang digunakan adalah penelitian kualitatif dengan  metode pengembangan sistem yang menggunakan  model  prototype dan pengujian Blackbox, hasil dari penelitian ini adalah sistem ini dibuat dalam bentuk prototype dimana ketika  sensor ultrasonik mendeteksi ketinggian air <=5 cm keatas dan sensor water flow membaca kecepatan aliran air diatas >4 L/m  maka ESP32 memproses ke motor servo  untuk membuka pintu air dan pada saat ketinggian air   >5 cm dan kecepatan air dibawah >4 L/m maka pintu akan otomatis tertutup. Data yang ditampilkan di website secara Real-Time dengan dilengkapi kontrol buka tutup pintu air dan notifikasi kondisi air dikirim ke whatsApp yang dapat dipantau dari jarak jauh melalui smartphone android yang dapat mempermudah petugas pengelola bendungan dalam pengawasan dan kontrol pintu air.
RANCANG BANGUN SISTEM KENDALI INTENSITAS CAHAYA LAMPU RUANGAN MENGGUNAKAN FUZZY LOGIC BERBASIS MIKROKONTROLER ARDUINO MEGA
Authors: Aldi Ahmad
Published: January 2024

Abstrak. Aktivitas manusia sebagian besar membutuhkan cahaya, akan tetapi sinar cahaya matahari tidak bersinar selama 24 jam atau cuaca mendung, manusia tetap bisa beraktivitas dengan menggunakan cahaya lampu.  Untuk dapat mengoptimalkan cahaya pada ruangan, maka diperlukan kontrol intensitas cahaya di ruangan tersebut yang dapat mengefisiensi daya listrik pada pemakaian lampu. Pada penelitian ini dibuat sistem kendali intensitas cahaya menggunakan fuzzy logic berbasis Arduino Mega dengan sensor cahaya BH1750 dan sensor IR.  Prinsip kerjanya yaitu ketika sensor IR mendeteksi jumlah orang diruangan maka sensor tersebut akan mengirim sinyal ke Mikrokontroler untuk menghidupkan atau mematikan relay. Sensor cahaya BH1750 akan mengukur intensitas cahaya di ruangan dan mengirim data sinyal ke Mikrokontroler yang akan diolah sesuai program fuzzy logic. Setelah diproses data hasil berupa sinyal PWM akan di kirim modul AC Dimmer untuk mengontrol intensitas cahaya lampu. Hasil perbandingan data tanpa sistem kendali dengan data hasil penelitian sistem fuzzy input intensitas cahaya, persentase efisiensi daya sebesar 69,24% dan untuk sistem fuzzy input error delta error, persentase efisiensi daya sebesar 68,76%. Hasil pengukuran pada alat menunjukan bahwa intensitas cahaya saat menggunakan sistem fuzzy yaitu 149--156 lux dengan target set point yaitu 150 lux dan menurut SNI pada ruang tamu tingkat intensitas cahaya minimum yaitu 120--250 lux.
APLIKASI TRACER STUDY POLITEKNIK ENJINERING INDORAMA
Authors: Mulyani Heti
Published: January 2024

Salah satu cara mengukur keberhasilan pendidikan di perguruan tinggi adalah dengan melihat berapa banyak alumni yang terserap di dunia kerja. Untuk mengetahui hal tersebut perlu dilakukan pelacakan alumni atau tracer study. Aplikasi tracer study adalah sebuah sistem online yang digunakan sebagai alat pelacakan jejak atau aktivitas alumni perguruan tinggi. Aplikasi tracer study merupakan salah satu instrumen kelengkapan dalam akreditasi perguruan tinggi. Berdasarkan standar Dikti, pelacakan ini biasa dilakukan hingga 2 tahun setelah masa kelulusan. Tracer study juga berisi kuesioner tentang data masa tunggu lulusan memperoleh pekerjaan, testimoni alumni serta testimoni dari perusahaan terhadap lulusan. Selain itu data tracer study juga bisa digunakan untuk melakukan perbaikan proses pembelajaran di masa yang akan datang. Tujuan dari penelitian ini adalah membangun aplikasi tracer study dengan meliputi pengolahan data kuesioner, testimoni alumni, event yang diadakan oleh kampus, informasi lowongan pekerjaan serta testimoni dari perusahaan. Bahasa pemrograman yang digunakan untuk membangun aplikasi tracer study ini menggunakan PHP dengan framework laravel. Metode pengembangan perangkat lunak menggunakan Unified Modelling Language. Hasil dari penelitian ini berupa aplikasi yang mampu melakukan pengolahan data alumni, memberikan informasi lowongan pekerjaan, informasi event yang dilaksanakan, serta kritik saran dari alumni. Dengan adanya aplikasi ini, proses pengelolaan data alumni menjadi lebih efektif dan efisien.
ANALISIS SITUASIONAL DAN PERANCANGAN SISTEM INFORMASI KEUANGAN PADA PT ZMI
Authors: Sopiyan Asep , Darajatun Rizki Achmad
Published: January 2024

Dalam perkembangan teknologi yang semakin pesat dan dapat memudahkan pekerjaan manusia terutama dalam pencatatan keuangan pada suatu perusahaan. Hal ini dapat membantu dan menjadi solusi dari adanya permasalahan mengenai pencatatan keuangan perusahaan yang cukup lama. Keuangan menjadi hal vital dalam suatu perusahaan yang keberadaannya harus terus diawasi. Oleh karena itu, penelitian ini bertujuan untuk mempermudah pencatatan keuangan perusahaan dengan menggunakan sistem informasi keuangan agar tersusun lebih sistematis. Penelitian ini menggunakan metode deskriptif kualitatif melalui beberapa tahapan dimulai dengan survei pada perusahaan, identifikasi masalah, analisis situasional dan sistem. Sehingga, hasil dari penelitian ini yaitu mendapatkan analisis dari segi system requirement atau kebutuhan sistem diantaranya memenuhi kebutuhan fungsional, hal keamanan, skalabilitas, performa, dan persyaratan teknis sistem. Segi pemodelan proses meliputi proses dalam sistem, proses pengguna, dan administrator, dari segi pemodelan data meliputi entitas dalam sistem dan hubungan antara user dengan catatan anggaran. Selain dari segi analisis situasional juga menghasilkan perancangan input, output, dan user interface. Maka dari itu, hasil dari penelitian ini dapat berguna untuk membantu perusahaan dalam pencatatan keuangan dengan sistem informasi yang telah dirancang.
IDENTIFIKASI CITRA POSE TEGAK UNTUK PEMILIHAN ANGGOTA BARIS BERBARIS MENGGUNAKAN CONVOLUTIONAL NEURAL NETWORK DI SMK MUHAMMADIYAH MUNGKID
Authors: Toha Bae
Published: January 2024

Penelitian ini membahas bagaimana penerapan metode CNN dapat digunakan untuk menciptakan sebuah sistem yang secara otomatis dan akurat mengidentifikasi pose berdiri tegak untuk baris berbaris. dengan menggunakan metode Convolutional Neural Network (CNN) yang merupakan metode klasifikasi yang sangat baik untuk menganalisis gambar digital. Desain CNN dibuat khusus untuk menganalisis objek dalam gambar, sehingga sangat berguna untuk klasifikasi gambar. Diharapkan dengan menggunakan metode ini bersama dengan data yang relevan, hasilnya adalah tingkat ketajaman dan efisiensi yang lebih tinggi. Penelitian ini menghasilkan sebuah sistem yang dapat mengidentifikasi pose tubuh  kurang tegak dengan akurasi sebesar 59% dengan confidence 58,54% dan mengidentifikasi pose tegak dengan akurasi sebesar 80% dengan confidence 79,36% berdasarkan gambar yang di upload
IMPLEMENTASI EXPLORATORY DATA ANALYSIS UNTUK ANALISIS DAN VISUALISASI DATA PENDERITA STROKE KALIMANTAN SELATAN MENGGUNAKAN PLATFORM TABLEAU
Authors: Rizki Irfan Nur , Prayoga Dimas , Puspita Mutiara Lia , Huda Muhammad Qomarul
Published: January 2024

Data jumlah penderita stroke di Provinsi Kalimantan Selatan didokumentasikan melalui tabel dan format Excel, tersedia di Satu Data Indonesia. Angka-angka pada data unduhan bervariasi dan terdapat kekosongan sehingga menyulitkan interpretasi dan analisis. Untuk mengatasi masalah tersebut, peneliti menggunakan metode Eksploratory Data Analysis (EDA) dengan bantuan software Tableau. Visualisasi data mencakup perubahan kasus baru, jumlah kematian akibat stroke, perbandingan kasus baru dan lama, total penderita stroke, dan tren kasus stroke di Kalimantan Selatan (2020-2022). Meskipun terjadi penurunan kasus baru dan kematian, beberapa daerah masih mengalami kenaikan kasus baru pada 2022, menunjukkan variasi tren. Analisis lebih lanjut diperlukan untuk memahami faktor-faktor yang mempengaruhi perubahan tersebut.
DESAIN MODUL SWITCH SELECTOR UNTUK PENGGUNAAN REMOTE CONTROL PADA MULTIDISPLAY DIGITAL SIGNAGE BERBASIS MULTIPLEXER
Authors: Mulyo Alfina Putri , Setyaningsih Endah
Published: January 2024

Digital signage is an electronic device that can display information or announcements digitally. The choice of device depends on the characteristics of the place where the digital signage is placed. Restaurants are one of the places where a large number of digital signage is used. The large number of digital signage can extend the display setting time of digital signage displays. The large number of digital signage units used can also affect the number of remotes used, making it less efficient when setting up displays. Therefore, this design is made to make it easier for users to choose which digital signage display they want to set. This design is in the form of a selector module called a multiplexer-based switch selector module. This module consists of a toggle switch, multiplexer, and infrared receiver as the main components and has 4 output channel which can connect with 4 display digital signage. Tests are carried out using 1 digital signage in rotation for each channel. Digital signage display can respond to the signal emitted by the remote via an infrared receiver connected to the module. Therefore, it can be concluded that the switch selector module in the use of remote control can function properly.
INTEGRASI GAMIFIKASI DALAM APLIKASI SAMPAH TUKAR: DESAIN UI/UX UNTUK PERTUKARAN SAMPAH DENGAN MATA UANG DIGITAL
Authors: Rasendriya Muhammad Ammar , Fauzi Krisna Rizki , Puspita Sari Juliana Anggun , Sinaga Rasijah Amanda , Mandasari Raden Deasy
Published: January 2024

Dalam menghadapi masalah sampah yang terus meningkat, termasuk di Indonesia, penumpukan sampah yang semakin tak terkendali menimbulkan ancaman lingkungan yang signifikan. Untuk mengatasi permasalahan ini, diperlukan solusi untuk mengurangi jumlah sampah yang terus bertambah. Penelitian ini mengusulkan pengembangan aplikasi yang memfasilitasi pertukaran sampah daur ulang dengan uang digital (e-money) dan pulsa. Aplikasi ini bertujuan untuk menyederhanakan proses pertukaran sampah dan mengatasi keterbatasan pada aplikasi yang sudah ada. Aplikasi yang diusulkan mengintegrasikan elemen-elemen gamifikasi, meningkatkan keterlibatan pengguna melalui insentif berbasis poin. Selain itu, aplikasi ini memanfaatkan uang digital sebagai mekanisme penghargaan, sejalan dengan tren transaksi digital. Metodologi penelitian melibatkan wawancara dan tinjauan literatur untuk mengumpulkan informasi, seperti flowchart, use case diagram, dan activity diagram. Desain sistem proses pertukaran sampah, pertukaran poin, dan riwayat transaksi. Hasil penelitian menunjukkan efektivitas aplikasi ini dalam menyederhanakan proses pertukaran sampah, menawarkan antarmuka yang ramah pengguna, dan memastikan transaksi yang aman. Pengguna dapat meminta pengambilan sampah, melacak riwayat transaksi, dan menukar poin yang diperoleh menjadi uang digital atau pulsa. Inisiatif ini tidak hanya mengatasi masalah lingkungan, tetapi juga mendorong rasa tanggung jawab di kalangan masyarakat, pada pengelolaan sampah di Indonesia.
ANALISIS RISIKO KEBAKARAN HUTAN DENGAN LOGIKA FUZZY MAMDANI
Authors: Muhtadi Nashiruddin Sahal , Rahman Dhaffa Mulya , Surianto Dewi Fatmarani
Published: January 2024

Kebakaran hutan di Taman Nasional Tanjung Puting (TNTP) merupakan masalah yang sering terjadi dan memiliki dampak serius terhadap ekosistem dan satwa liar di area tersebut. Untuk mengatasi masalah ini, diperlukan analisis risiko kebakaran hutan yang efektif. Dalam penelitian ini, metode fuzzy logic Mamdani digunakan untuk menganalisis risiko kebakaran hutan di TNTP. Metode ini mempertimbangkan variabel input seperti suhu udara, kelembapan udara, dan kecepatan angin untuk memprediksi tingkat risiko kebakaran hutan. Langkah-langkah penerapan metode fuzzy logic Mamdani meliputi penentuan variabel input dan output, penentuan fungsi keanggotaan, dan penentuan aturan fuzzy. Aturan fuzzy dibuat berdasarkan kombinasi nilai-nilai himpunan fuzzy dari variabel input yang telah ditentukan. Hasil penelitian menunjukkan bahwa dari 15 data pengujian, 80% berisiko tinggi, 13,3% berisiko sedang, dan 6,7% berisiko rendah. Hal ini mengindikasikan bahwa sebagian besar kondisi cuaca di TNTP memiliki tingkat risiko kebakaran yang tinggi.
REKONFIGURASI SALURAN UDARA PADA PENYULANG JARINGAN TEGANGAN MENENGAH UNTUK MENGURANGI DROP TEGANGAN DI PT. PLN (PERSERO) ULP PACET
Authors: Aprillia Irma Rizky , Akmalia Irfan Fikri , Wulandari Diyah Ayu , Sujito Sujito
Published: January 2024

Peningkatan jumlah pelanggan pada Jaringan Tegangan Menengah di wilayah Penyulang Gading telah mendekati batas standar yang diizinkan. Dalam rangka mengatasi permasalahan ini, rekonfigurasi penyulang Gading menjadi suatu langkah yang diperlukan. Penelitian ini bertujuan untuk menentukan nilai losses dan drop tegangan terkecil pada titik pemindahan beban rekonfigurasi penyulang, khususnya dengan memindahkan sebagian beban dari Penyulang Gading ke Penyulang Sumber Glagah. Hal ini bertujuan untuk mengantisipasi lonjakan tegangan yang mungkin terjadi akibat penambahan pelanggan baru di kawasan Penyulang Gading. Metode yang digunakan mencakup studi literatur, pengumpulan data, pengolahan data, dan langkah-langkah sistematis. Hasil penelitian menunjukkan bahwa rekonfigurasi menyebabkan pengurangan drop tegangan pada penyulang Sumber Glagah dan Gading, dengan nilai drop tegangan penyulang Sumber Glagah berkurang dari 0,264% menjadi 0,208%. Implikasinya, rekonfigurasi tersebut dapat dianggap sebagai solusi efektif untuk meningkatkan kinerja jaringan distribusi listrik di wilayah tersebut.