bluuebunny/crossref_metadata_2025 huggingface dataset:
A new brazilian amazon energy sustainability index based on fuzzy systems
Authors: Muniz Rafael Ninno , de Sá José Alberto Silva , da Rocha Brigida Ramati Pereira , Buratto William Gouvêa , Nied Ademir , da Costa Carlos Tavares
Published: December 2023

Energy sustainability indicators are essential for evaluating and measuring energy systems’ environmental, social, and economic impact. These indicators can be used to assess the sustainability of different energy sources, such as renewable or fossil fuels, as well as the performance of energy systems in various regions or countries. The goal of this paper is to propose a new energy sustainability index based on fuzzy logic for the Amazon region. The fuzzy inference system enabled the operationalization of subjective sustainability concepts, resulting in a final index that can evaluate the performance of the states in the Legal Amazon and compare them to each other. The results indicated that Mato Grosso had the highest ranking, followed by Tocantins, Amapá, Roraima, Rondônia, Pará, Acre, Maranhão, and Amazonas in the last position. These findings demonstrate that the selected indicators and the final index are effective tools for evaluating the energy sustainability of the Amazon region and can aid public managers in making decisions and proposing sustainable regional development policies for the region.
Hybrid deep model for predicting anti-cancer drug efficacy in colorectal cancer patients
Authors: Karthikeyan A. , Jothilakshmi S. , Suthir S.
Published: December 2023

Cancers are genetically diversified, so anticancer treatments have different levels of efficacy on people due to genetic differences. The main objective of this work is to predict the anticancer drug efficiency for colorectal cancer patients to reduce the mortality rates and provides immune energy for the patients. This paper proposes a novel anti-cancer drug efficacy system in colorectal cancer patients. The input data gene is normalized with the Min–Max normalization technique that normalizes the data in distinct scales. Subsequently, proposes an improved entropy-based feature to evaluate the uncertainty distribution of data, in which it induces weight to overcome the issue of computational complexity. Along with this feature, a correlation-based feature and statistical features are also retrieved. Subsequently, proposes a Recursive Feature Elimination with Hybrid Machine Learning (RFEHML) mechanism for selecting the appropriate feature set by eliminating the recursive features with the aid of hybrid Machine Learning strategies that combine decision tree and logistic regression. Also, the Gini impurity is employed for ranking the feature and selecting the maximum importance score by eliminating the least acquired importance score. Further, proposes a hybrid model for predicting the drug efficiency with the trained feature set. The hybrid model comprises of Long Short-Term Memory (LSTM) and Updated Rectified Linear Unit-Deep Convolutional Neural Network (UReLU-DCNN) model, in which DCNN is modified by updating the activation function at the fully connected layer. Consequently, the learned feature predicts the drug efficacy of anti-cancer in colorectal cancer patients by determining whether the patient is a responder or non-responder of the drug. Finally, the performance of the proposed RFEHML model is compared with other traditional approaches. It is found that the developed method has higher accuracy for each learning percentage, with values of 60LP = 92.48%, 70LP = 94.28%, 80LP = 95.24%, and 90LP = 96.86%, respectively.
How can the work activity point of view inform territorial development projects?
Authors: Cunha Liliana , Lacomblez Marianne
Published: December 2023

BACKGROUND: The heuristic potential of work activity-focused territory analyses has yet to be explored in depth. Instead of viewing territories as a product of their actors, the prevailing approaches rely on statistical indicators to view them “from above”. OBJECTIVE: To understand how work activity acts upon a territory and transforms it, and to discuss what the main indicators used to characterize territories reveal and conceal. METHODS: Case studies led on two territories, each in a different industry. One on transportation in a sparsely populated “low density” area; the other in an industrial district, focusing on its “high activity rate” cork industry. In the first case, work activity analyses were led with drivers and mobility designers, including systematic observations and interviews, in the context of an endeavour to redesign a local transport network. In the second case, work activity analyses led among cork stopper choosers were followed with an integrative literature review of indicators about the cork industry and its health impacts. RESULTS: This territory analysis highlights: (i) traces of bus drivers’ work activity on the mitigation of inequalities in access to public transportation; (ii) “absent indicators” regarding cork choosers’ work activity and its health impacts, stressing the existence of a development agenda for this territory focused on cork processing rather than on those who perform it. CONCLUSION: Our analysis of territorialization processes through the lens of work activity signposts a path for research-action seeking to associate territorial development with improvements in the working conditions of citizen workers.
Information technologies of simulation of beam structures using multispectral spacecraft materials
Authors: Trysnyuk Vasyl M. , Shumeiko Viktor O.
Published: December 2023

The work is devoted to solving the scientific and practical task of modeling beam structures based on the materials of multispectral space images based on aerospace and contact measurements. The effectiveness of the use of space survey materials for the study of soil cover largely depends on the time of the survey. The linear forms of erosion (waterholes, ravines) are deciphered on space photographs, which are displayed only on images with a spatial resolution of 1-2 meters in the form of narrow, clearly delineated contours that have a jagged shape.The developed clustering algorithm makes it possible to more clearly identify beam structures on satellite images in combination with data from digital terrain models (DRM). A number of experiments were conducted on some set of remote sensing data of Boryspil and c. Panchevo, Novoukrainsky District, Kirovohrad Region. The experiments consisted in determining the spectral and other features of the beam structures (for example, the shape, soil types, etc.), which are located in different places of the territory that was investigated.On images with a spatial resolution of more than 10 meters, ravines are usually not displayed, but networks of beams with elongated wavy tree-like shapes are clearly visible. In the course of the study, data from multispectral imaging from the Sentinel-2 satellite (MSI scanner) and DEM (Digital Elevation Model, DEM) data obtained through the SRTM 3 archive were used.The research results showed that automating the process of highlighting beam structures on multispectral images with a spatial resolution of 30 m is very difficult. First of all, this can be explained by the fact that the beam consists of vegetation that is also present outside the beam. In addition, the number of channels of the ETM+ scanner and its spatial ability are not enough for a clearer separation of the "beam" class.
Rainwater management by “green” roofs on the example of trade-business centre “Perekhrestia”, Dnipro city
Authors: Hlushchenko Roman O. , Tkachenko Tetiana M.
Published: December 2023

The densification of urban building causes the replacement of urban green areas with negative environmental impact. Therefore, it is necessary to move to the concept of combining living plants with building structures. The concept of green construction is a universal approach that allows not only to reduce the negative impact of construction on the environment but on the contrary, to ensure a positive impact on the environment. This concept can be applied at all levels – from a single building to neighborhoods or settlements. One of the serious problems of cities is the management of stormwater runoff. They carry trash, bacteria, heavy metals and other pollutants through storm drains into local waterways. The most common means of managing urban runoff are storm sewer systems, which have the conventional name of "grey infrastructure." These systems are ageing and require expensive repairs. Due to climate change, the amount of runoff is increasing, which leads to exceeding the carrying capacity of the systems. The development of territories significantly disrupts the water balance. The sponge city allows effective solving of these problems thanks to the maximum approach of the functioning of built-up areas to unbuilt ones. In this work, a "green" roof is being developed on the roof of the "Perekhrestia" shopping and business center in Dnipro city. To do this, the volume of precipitation in the city for 2022 was analyzed. The "Roof Garden" system from the Zinko-Ukraine company was adopted. This system currently has a margin of 50% retention of precipitation falling on green areas. To dispose of water from pedestrian areas, it is necessary to install water storage tank(s). It is advisable to use this water for watering green areas or for toilet needs. Two toilets in the public toilet ensure the emptying of the tank(s) in 15 days. Increasing the number of sanitary devices simplifies the water supply system and increases the resilience of objects to climate change.
Information technologies of application architecture`s IT services
Authors: Dovgiy Stanislav O. , Kopiika Oleh V. , Kozlov Oleksii S. , Lytvynenko Alina O.
Published: December 2023

The development of the System Architecture of the IT infrastructure focused on the usage of modern Data Centers is considered. The purpose of the research is to develop a strategy for the development of the System Architecture of the IT infrastructure based on the usage of advanced methodologies and concepts of leading manufacturer’s hardware and software. The following principle of IT infrastructure construction is formulated: IT infrastructure architectures define a set of services. IT services are provided to three groups of clients. IT services and clients are connected by 5 implementation scenarios. The integration of IT services is determined by 5 architectures. As IT services, we understand information technologies aimed at maintaining the following elements in technically good condition: network devices, computing equipment, data storage devices, automatic software deployment services, network services, perimeter protection services, directory services, file and print services, data management services, business application services, IT management services, archiving and recovery services, certificate management services, integration services. Architectures define the fundamental principles of building IT services and their relationship. One of the most important architectures is the architecture of software applications. The architecture of software applications is determined by the business needs of the corporation and the approaches, methods of creating applications by a specific developer. It defines the execution environment for applications, mechanisms of communication between applications and components, tools for controlling the application and managing its state, as well as storage for structured and unstructured data types. Tasks of the architecture: to provide an environment for the execution of application components; support dispatching mechanisms for communications between application components; implement tools for monitoring the level of services and diagnosing problems; provide storage of structured and unstructured information. Standardization of the application architecture allows you to minimize costs associated with the support of several types of architectures, each for a specific type of business application.
Diskursus Hakikat Kurikulum Pendidikan Islam
Authors: Samad Sri Astuti A.
Published: December 2023

This study discusses the nature of the curriculum in Islamic education which is an important component in education. This paper is qualitative in nature with an Islamic educational philosophy approach. The research concludes that the basic framework of the Islamic education curriculum is based on revelation and value of tauhid to Allah SWT. The curriculum has four foundations, namely; philosophical, sociological, organizational, and psychological, while the principles of the curriculum, for example, are based on Islamic values, integral and flexible. Then the first curriculum orientation is preserved Islamic values, students, labor and science and technology. In essence, the curriculum content must include three parts, namely; scientific intelligence (cognitive), skills (psychomotor) and values. Likewise the curve of evaluation and review as changes from social change and the times. Therefore, it is important to emphasize that essence, basic framework, principles, orientation and content refer to the reference to Islamic values ​​and monotheism as a characteristic and relationship of Islamic education. This characteristic of monotheism is what distinguishes Islamic education and Western education from a philosophical perspective.
АНАЛІЗ МЕТОДІВ ПРОЕКТУВАННЯ ТА ВИРОБНИЦТВА ЛІТАКІВ З ЕЛЕКТРИЧНИМ ВЕРТИКАЛЬНИМ ЗЛЬОТОМ І ПОСАДКОЮ
Authors: Погудіна О. К. , Сурмак М. О. , Попов О. В.
Published: December 2023

Recent advances in electric vertical take-off and landing (eVTOL) technology make these vehicles attractive for mass production in the aerospace industry. The subject of the study is a review of advances in the field of eVTOL aircraft design using modern modeling and computational tools. The goal is to analyze the current common concepts and design features of eVTOL aircraft in terms of power supply, power plant capacity, rotor designs, and the use of advanced lightweight composites. The method used is the study and analysis of open publications on the subject under investigation. Modern design methodologies are reviewed, comparison of tools used to analyze and optimize key parameters, such as total take-off weight, wingspan, rotor radius, battery performance, flight controllability, etc. An important stage is the test. The use of various methods of digital modeling increases the efficiency of this stage, as well as shortens the terms of production and modernization. A large place is devoted to the review of the problems of safe operation of eVTOL aircraft. Modeling eVTOL aircraft in a visually realistic environment allows you to get better results in less time. Conclusions: Research in the field of eVTOL & vehicle test design is of great practical importance in the world. The considered methodologies demonstrate the powerful dynamics of the industry. The use of modern information technologies allows at the stage of design and testing to model elements and processes more qualitatively, which gives such researchers a competitive advantage. The review carried out in the article allows you to use it as a basis for research in the field of eVTOL design, as well as research in the development of methods of autonomous intelligent control of eVTOL.
РОЗРОБКА МАНІПУЛЯТОРА ДЛЯ ПОВНОЇ АВТОМАТИЗАЦІЇ ПРОЦЕСУ ЗАРЯДЖАННЯ ЕЛЕКТРОМОБІЛЕЙ
Authors: Myglovets I. , Rudenko N. , Sysoiev Iur. , Shyrokyi Y.
Published: December 2023

Electric cars are gradually gaining popularity both in the world and in Ukraine. But in order for them to be freely used throughout the country, an appropriate infrastructure is needed. Unlike traditional cars with internal combustion engines, electric cars can be refuelled anywhere there is access to an electrical outlet. The main problems of electric cars during their operation over long distances are related to the duration of the journey on one charge and the low development of the infrastructure for them. Systems of automated charging stations are also gradually developing. There are already terminals of charging stations with payment by bank card and other payment systems, but they work on the principle of self-service. For full automation of the charging process, connecting the charging station to the electric car without human intervention is not enough. Wireless charging can solve this problem, but at this stage of development, the power transferred in this way is not always enough. To solve this problem, a combination of a manipulator arm and a typical charging station was proposed. The manipulator will determine the vehicle's position and insert the charging station's socket into the car's plug using sensors and machine vision. As part of this work, we made a conceptual project of a manipulator that will automatically connect the connector of the charging station to the car. Also, for this charging complex, a system of monitoring and protection of the electrical connection of the charger with the consumer against short circuit, overheating, sparking and arcing connector was developed, taking into account various interchangeable connectors. When developing the manipulator's arms, the following tasks were taken into account: ensuring sufficient kinematic freedom of movement to cover the working area of the charging station service and maximally simplifying the design. To reliably ensure access to any point of the working space, a kinematic scheme with two translational and three rotational links was used. Next, to determine the position of the manipulator in the workspace, the direct and inverse kinematics problems for this scheme were solved. The physical model of the manipulator along with servomotors, PID controllers and control system based on the equations of kinematics problems was simulated in the Matlab application software package. The implementation of a machine vision system and a switching device protection system is proposed for a full-fledged control system of the automated charging station. The resulting design of the automated charging station is experimental and does not have many analogues in the world. The modularity of the design ensures the versatility of its use at other types of charging stations, as well as the possibility of its modernization.
ДЕЯКІ ТЕХНОЛОГІЧНІ АСПЕКТИ СКЛАДАННЯ АГРЕ-ГАТІВ СУЧАСНИХ ЛІТАКІВ
Authors: Толстой С. А. , Сухов В. В.
Published: December 2023

The structure of the labor intensity of aircraft manufacturing is considered, in which the largest part is occupied by the aggregate and final assembly. The need for redistribution of work between different types of production has been formed in order to further reduce the labor intensity of assembly by forming additional requirements for structural elements that differ from the design documentation and the fulfillment of which would be expected during assembly. The main ways to reduce the labor intensity of the unit and final assembly of modern aircraft have been identified, which consist of increasing the level of production manufacturability of structures, integrated mechanization and automation of production.The main trends in the orientation of aviation production towards modern means of technological equipment are considered. A specification of the use in the technical literature of the concepts “assembly device” and “slipway” is proposed to determine clear guidelines for establishing a certain type of technological equipment, depending on a number of factors. A review of domestic and foreign technologies for assembling and joining assemblies of aircraft structures was completed, and forecast data on the accuracy of the resulting joints was generated. It is concluded that there is a domestic (as well as Soviet, for the most part) aircraft manufacturing practice, which involves performing connection operations here, in the slipway, using mainly built-in (portable) or manual mechanized tools, which leads to a large amount of manual labor, and the need to complete the joints of compartments and units “on site” also makes it impossible to ensure high precision parameters of the joint zone. Examples of processes for joining fuselage compartments of foreign-made aircraft using standless docking stands or mobile robotic platforms are considered, which are integrated with the aircraft coordinate system and allow holes to be placed with high precision, drilled and fasteners installed. An analysis of the factors influencing the final accuracy during assembly and docking work in various “schools” of assembling aircraft structures was carried out. A review of some representatives of technological automated equipment for performing assembly work was carried out. A list of optimal criteria for assessing production manufacturability when making connections during the assembly of aircraft structures is proposed.
National composition of the population of Subcarpathian Russia in 1919-1938
Authors:   Vasyl Stefanyk Precarpathian National University, Hlinka Bohdan
Published: December 2023

The purpose of the study is to investigate the national composition of the popula- tion of Subcarpathian Rus in the interwar period and the factors that infl uenced the change in the national composition in 1919-1938, based on archival sources. Research methodology. Th e article uses general scientifi c methods, in particular the analysis and synthesis of various sources, induction and deduction. Th e principles of historicism, objectivity, comprehensiveness, integrity and systematicity are applied. Th e text uses the appropriate terminological apparatus, which substantiates the author’s vision of the peculiarities of the national composition of the population of Subcarpathian Rus in the interwar period, as well as the factors that infl uenced its change. Th e scientifi c novelty consists in a comprehensive study of the national composition of the population of Subcarpathian Rus based on archival sources for individual districts and set- tlements, statistical and comparative data on changes in the national composition of the region’s population in the 1920s and 1930s based on sample settlements are provided. Сonclusions. In addition, Subcarpathian Rus was a region with the most varied national composition of the population, which also had its own characteristics, for example, some nationalities such as Hungarians or Germans had their own areas of residence, which were determined by political, cultural and economic factors. Although such a national minority as Jews did not have a defi nite place of residence and were “scattered” throughout the country. Th e reasons for the change in the national composition of the population, such as emigration processes, the state of medicine, etc., are separately investigated. Signifi cant changes began to take place at the end of the 20s and the beginning of the 30s of the 20th century, with the improvement of the general well-being of the population. One of the main factors that contributed to the improvement of the popula- tion’s standard of living was the admission to government positions of the native population of Subcarpathian Rus – Ruthenians, although there was also a negative trend of population de- cline associated with emigration processes, which, however, did not have a signifi cant impact on changes in the national composition population of the region. For a more complete understand- ing of the national composition of the population of Subcarpathian Rus in the specifi ed period, a detailed study of the population censuses for 1921 and 1930 was conducted.
Crisis of parliamentary democracy and its attempts overcome in the Second Republic in 1924-1926
Authors:   Bohdan Khmelnytsky National University  of Cherkasy, Кirіeіeva Victoria , Irzhavska Anzhela ,   Bohdan Khmelnytsky National University  of Cherkasy
Published: December 2023

The purpose of the article is to study the crisis period in the process of establish- ing parliamentary democracy in the Second Polish-Lithuanian Commonwealth in 1924-1926. Research methodology. General scientifi c complex research methods (empirical, comparative, theoretical, analysis method) are applied. In the process of research, the authors were guided by the principles of historicism, objectivism and systematicity, thanks to which the source and historiographical material processed and involved in this scientifi c investigation is reliable and representative. The scientifi c novelty of the article is determined by the fact that the authors have made an attempt to carry out a comprehensive analysis of the positions of the leading Polish political parties towards the current model of parliamentary democracy, as well as their proposals for its reform. Conclusions. Th e article highlights the political debate in the Polish po- litical space regarding overcoming the crisis of parliamentary democracy through the reform of the electoral legislation and the Constitution of 1921. The party debate on issues of state and the legal system of the Second Polish-Lithuanian Commonwealth in 1924–1926. The main propos- als for reforming Polish statehood are characterized. It was found that most of the Polish political parties considered the lack of conditions for the creation of a stable parliamentary majority to be the main problem of the crisis in the country’s public life, which would facilitate the imple- mentation of a consistent and long-term government policy. At the same time, the principle of proportional representation, the practice of which led to the emergence of an unreasonably large number of parliamentary factions, was considered the most important drawback of electoral law. One of the proposed options for overcoming the crisis was a transition to a majoritarian electoral system, which would favor large parties and the creation of a strong parliamentary majority and a government based on it.
Pengaruh Waktu Fermentasi Terhadap Produksi Bioetanol Dari Limbah Kulit Buah
Authors: Zaki Muhammad , Razali Nasrullah , Rizki Muhammad , Fahmi Syahrul
Published: December 2023

Penelitian ini mangkaji pengaruh waktu fermentasi terhadap produksi bioetanol dari limbah kulit nenas dan kulit jeruk sebagai sumber selulosa. Percobaan dilangsungkan dengan metode sakarifikasi asam dengan menggunakan HCl dan fermentasi anaerobik menggunakan ragi saccharomyces cerevisiae. Â Setelah proses pemurnian produk hasil fermentasi, kadar bioetanol yang paling tinggi dari kulit nenas didapat sebesar 3,3%. Nilai ini dicapai pada saat fermentasi dilangsungkan selama 5 jam dan massa ragi yang ditambahkan sebesar 15 g. Sedangkan kadar bioetanol dari kulit jeruk terttinggi juga diperoleh pada waktu fermentasi 5 jam dan variasi massa ragi seberat 15 g yaitu sebesar 1,7%. Demikian juga halnya dengan volume bioetanol yang dihasilkan setelah pemurnian, dimana volume bioetanol dari limbah kulit nenas lebih banyak diperoleh yaitu sebesar 3,5 mL dibandingkan dengan bioetanol dari limbah kulit jeruk jeruk yaitu hanya sebesar 3,3 mL. Hal ini disebabkan oleh kadar gula yang terkandung didalam kulit nenas lebih tinggi dibandingkan yang terkandung dalam kulit jeruk. Oleh karena itu, pemanfaatan kulit buah nenas dan jeruk dapat digunakan untuk produksi bioetanol melalui pendekatan bioteknologi dengan menggunakan ragi saccharomyces cerevisiae.
Sistem Temu Kembali Citra Termal Kanker Payudara Pada Citra Rekam Medis
Authors: Serianti Putri , Muharar Rusdha , Oktiana Maulisa , Aulia Niza
Published: December 2023

Medical record images (Medical Imaging) in the form of the thermal images can be able to detect of of breast cancer as early detector for the patient. The technic process is by utilizing the thermal image of an existing breast cancer patient, the thermal image of the new patient can be searched by the similarities the image of the old patient. In order to get the exactly results, required an accurate system to find the thermal imaging of breast cancer patients in the thermal image database. This study aims to build a Content Based Imaged Retrieval (CBIR) system for thermal images of breast cancer patients based on thermal images have been diagnosed by specialist doctors. This system with using a combination of color histogram features and dominant color descriptors. To determine the similarity between the query image and the dataset image with using of two methods that is measuring the Euclidean Distance and the Minkowski Distance. The results of this research show from testing the combination between the two features, the F-measure evaluation value obtained from the top 10 retrieval was in the healthy image category of 0.07 and 0.09 in the cancer image category. From the conducting testing process result, the concluded is the most appropriate feature in carrying out the breast thermal image retrieval process is using a combination of dominant color descriptor features and color histograms.
Potensi Biogas Dengan Pretreatment Substrat Kulit Kopi Menggunakan Campuran Rumen Sapi
Authors: Salwa Adelia
Published: December 2023

Biogas is an alternative energy source to reduce the use of fossil fuels. This research aims to explore the potential production of biogas using pretreatment of coffee husk substrate, both biologically with civet dung and chemically with NaOH solution, and compare it with the process without pretreatment. The fermentation process is carried out by adding rumen microorganisms to each digester with variations in substrate composition and fermentation time for 35 days, with sampling times at 7, 14, 21, 28, and 35 days. Biogas testing is performed by measuring the methane (CH4) content and total solids (TS) in the substrate. The results of the research show that pretreatment of coffee husk substrate has a significant impact on biogas (CH4) production. Biological pretreatment with civet dung produced the highest methane gas, reaching 42.3724% on the 28th day of fermentation with a mixture of 50% coffee husk + 25% rumen + 25% water, while the process without pretreatment produced the lowest methane gas, at 6.38433% on the 7th day of fermentation. The total solids results indicate an increase and decrease in total solids content in the reactor with various treatments. The highest total solids result was obtained with biological pretreatment at 40.15%. This research indicates that biological pretreatment of coffee husk substrate with civet dung can increase biogas production efficiency, which can be a potential solution to reduce dependence on fossil energy sources and sustainably manage coffee husk waste.Keywords: Biogas, Pretreatment, Coffee Peel, Civet Dung, Rumen Microorganisms, Production Efficiency, NaOH Solution.
Membran Selulosa Asetat Berbasis Nata De Coco Ditinjau Dari Pengaruh Penambahan Zat Aditif Polyethylene Glycol (PEG) Terhadap Permeabilitas (Fluks)
Authors: Fransiska Deswi , Yuliati Selastia , Junaidi Robert
Published: December 2023

Teknologi membran digunakan dalam industri untuk proses pemisahan maupun pemurnian.Â  Salah satu jenis polimer yang sering digunakan untuk membuat membran adalah selulosa asetat yang diperoleh dari Nata de coco. Tujuan dari penelitian ini untuk melihat pengaruh penambahan zat aditif polyethylene glycol terhadap karakterisasi dan kinerja membran selulosa asetat. Penambahan zat aditif polyethylene glycol, 10%, 17%, dan 28% dengan pelarut diklorometana 50% dan selulosa asetat 18%. Membran yang didapatkan dilakukan pengujian morfologiÂ  dan uji fluks membran. Hasil morfologi membran yang memenuhi syarat ultrafiltrasi adalah membran A didapatkan ukuran pori 0,618 Âµm, dan membran B sebesar 0,972 Âµm. hasil uji fluks rata-rata didapatkan 15,494 L/m2.jamÂ  untuk penambahan zat aditif 10%, 17,764 L/m2.jamÂ  untuk penambahan zat aditif 17% dan 19,455 L/m2.jam untuk penambahan zat aditif 28%. Hasil yang diperoleh menunjukkan bahwa pengaruh zat aditifÂ  pada membran selulosa asetat yaitu semakin banyak komposisi zat aditif maka semakin besar nilai fluks dan ukuran pori membran.
Pengendalian Kualitas Kayu Kering Pada Mesin Kiln Dryer Untuk Mengurangi Produk Cacat Dengan Metode Seven Tools Dan Failure Mode Effect Analysis
Authors: Abdurrahman Moh. , Rizqi Akhmad Wasiur , Jufriyanto Moh.
Published: December 2023

Konsep kualitas sering dikaitkan dengan kemampuan suatu produk untuk memenuhi kebutuhan dan harapan pelanggan. Penelitian ini melakukan pemeriksaan terhadap langkah-langkah pengendalian kualitas yang digunakan dalam proses pengeringan kayu. Analisis yang dilakukan menggunakan pendekatan tujuh alat yang meliputi check sheet, stratifikasi, diagram kendali, histogram, diagram Pareto, plot sebar, dan diagram tulang ikan. Temuan dari pengumpulan data menunjukkan adanya tiga kategori cacat produk berbeda yang terlihat selama proses pengeringan kayu. Kategori-kategori ini mencakup 1.529 kejadian lengkungan, 1.337 kejadian patah tulang, dan 955 kejadian cek. Berdasarkan penggunaan teknik tujuh alat, ditentukan bahwa kategori cacat produk yang paling dominan adalah kesalahan warp, yang mencakup 40% dari total cacat produk. Komponen penyumbang utama disebabkan oleh faktor teknik yang memiliki nilai indeks keunggulan relatif (RPN) sebesar 168, Solusi yang perlu dilakukan yaitu menyesusaikan kurva pengeringan dengan benar sesuai dengan jenis kayu yang dikeringkan, kurva ini harus mempertimbangkan kelembaban awal kayu, ketebalan, dan jenis kayu yang digunakan, dilakukan pembuatan SOP pengeringan kayu untuk tiap jenis kayu, melakukan sosialisasi atapun pelatihan kepada operator, melakukan pengecekan mesin sebelum digunakan
Analisa Perawatan Mesin Pembentuk Papan Fiber Semen Dengan Menggunakan Metode RCM Di PT. XYZ
Authors: Baihaqi Wildan Khanif , Adesta Deny
Published: December 2023

PT. XYZÂ  merupakan perusahaan yang bergerak di bidang industri papan fiber semen, permasalahan yang Â terjadi pada PT. XYZ adalah sering terjadinya downtime mesin pada mesin pembentuk papan fiber semen. Masalah tersebut dikarenakan cipratan dari proses produksi yang berbahan baku semen sehingga cepat mengeras dan menyebabkan kerak, sehingga dapat memberikan dampak bagi proses produksi. Maka dari itu perlu untuk mengetahui komponen kritis yang sering mengalami kerusakan serta interval waktu yang tepat untuk melakukan pemeriksaan mesin pembentuk papan fiber semen. peneliti menggunakan analisa dengan pendekatan RCM (Reliability Centered Maintenance) untuk mengatasi masalah tersebut. RCM merupakan metode yang berfungsi untuk merancangÂ  sebuah desain sistem yang andal dan metode ini dapat memaksimalkan waktu penggunaan mesin serta bisa mengurangi angka downtime mesin. Setelah dilakukan penerapan metode RCM ditemukan komponen kritis dari mesin pembentuk papan fiber semen dengan analisa FMEA yaitu part Bearing VAT dengan RPN 366 dan Flow meter dengan RPN 343. Setelah itu diperoleh nilai MTTR part bearing VAT 2,57876 dan Flow meter 1,96815.serta nilai MTTF part bearing VAT 174,656,dan flow meter 176,971. Kemudian diperoleh interval untuk pemeriksaan partÂ  Bearing VAT selama 129,03 jam sekali dan Flow meter selama 163,26 jam sekali.
Pengolahan Limbah Sablon Menggunakan Membran Selulosa Asetat (Ca) Berbasis Pelepah Pisang Secara Mikrofiltrasi
Authors: Wati Ria Praba , Yuliati Selastia , Zaman Muhammad
Published: December 2023

Sablon merupakan teknik proses cetak yang menggunakan layar dengan kerapatan tertentu dan umumnya berbahan dasar nylon atau sutra. Tujuan penelitian ini adalah menerapkan membran selulosa asetat secara mikrofiltrasi untuk pengolaha limbah sablon. Membran akan dibuat dengan menggunakan selulosa pelepah pisang dengan komposisi 2 gr selulosa pelarut 25 ml aseton dan 1,7 ml PEG 400. Dalam penelitian ini, digunakan limbah cair sablon dengan variasi koagulan yaitu PAC 300; 600; 900; 1200; 1500 ppm serta variasi tekananÂ  0,2 ; 0,4 ; 0,6 ; 0,8Â  dan 1 bar. DariÂ  hasil penelitian, didapatkan hasil rejeksi logam Cr 68,14 %. pengukuran dilakukan kondisi optimum untuk variasi 0,2-1 bar range pada 0,2 bar dengan koagulan 1200 ppm.
Analisis Jangkauan Layanan Halte Trans Metro Pasundan Terhadap Lokasi Perguruan Tinggi di Wilayah Bandung Raya
Authors: Indrianawati Indrianawati , Sumarno Sumarno , Selan Tedy Imanuel
Published: December 2023

Efforts to improve the quality of Trans Metro Pasundan services can be carried out by determining the coverage area of Trans Metro Pasundan bus stops. One way is by analyzing the coverage area of TMP bus stops towards the locations of universities located in the Bandung Raya region. The method used for this analysis of TMP bus stop coverage towards university locations is the network analyst service area method. The coverage radius for TMP bus stop services is determined based on the maximum walking distance from and to the TMP bus stop, which is 400 meters and 800 meters. The analysis results show that out of 124 universities in the Bandung Raya region, 31 universities are within the coverage area of TMP bus stops within a 400-meter radius, and 45 universities are within the coverage area of TMP bus stops within an 800-meter radius. An analysis of the coverage capability of bus stops towards universities shows that the Bandung Accounting Academy is the university most accessible by TMP bus stops, with a total of 8 bus stops within a 400-meter radius and 13 bus stops within an 800-meter radius.
Karakterisasi Membran Komposit Silika Berbahan Baku Limbah Fly Ash Batubara untuk Proses Ultrafiltrasi
Authors: Nurul Fitri Fadia , Yuliati Selastia , Zikri Ahmad
Published: December 2023

Membran komposit silika dibuat dengan memanfaatkan kandungan silika dalam limbah Fly ash batubara hasil dari pembakaran unit pembangkit uap (boiler) yang dikompositkan dengan PVA (Polivinil Alcohol) dan PEG (Poli etilen Glikol) sehingga menghasilkan membran komposit silika. Penelitian ini menjelaskan pengaruh perbedaan karakteristik dari membran komposit silika dengan memvariasikan massa silika sebesar 0 gr, 3 gr, 5 gr, 8 gr, 10 gr, 12 gr, dan 15 gr terhadap koefisien rejeksi, permeabilitas, swelling, serta struktur permukaan dan morfologi. Membran komposit silika dengan variasi silika 15 gr memiliki struktur morfologi dengan diameter pori lebih rapat dan teratur dibandingkan membran komposit dengan variasi massa lainnya. Karakteristik dapat dibuktikan dengan kinerja membran dalam merejeksi larutan methylene blue sebesar 52,25 %, dengan ukuran diameter pori sebesar 0,175 µm dan permeabilitas sebesar 20,21 L/m2 yang dapat dikategorikan ke dalam jenis proses membran ultrafiltrasi.
Ampas Bubuk Kopi sebagai Karbon Aktif untuk Menurunkan Kadar COD dan TSS dalam Limbah Cair Industri Tempe
Authors: Kirani Rafa Diah , Ali Munawar
Published: December 2023

Dewasa ini, kualitas air sungai, salah satu sumber air penting, semakin terancam oleh pencemaran akibat berbagai aktivitas industri, termasuk industri tempe. Industri tempe adalah industri yang umum di Indonesia dan menggunakan air dalam berbagai tahap produksinya. Namun, limbah cair dari industri tempe sering mengandung polutan berbahaya, meliputi COD, BOD, dan TSS, yang seringkali dibuang tanpa pengolahan yang memadai. Tujuan dari penelitian ini yaitu untuk mengkaji efektivitas karbon aktif yang berasal dari ampas bubuk kopi sebagai adsorben terhadap penurunan kadar COD dan TSS di dalam limbah cair industri tempe. Penelitian ini juga mencakup analisis kualitas karbon aktif ampas bubuk kopi dan penentuan dosis optimum karbon aktif. Dalam uji kualitas karbon aktif, karbon aktif ampas bubuk kopi memenuhi syarat dalam hal kadar air dan daya serap terhadap iodin, meskipun kadar abunya melebihi batas baku mutu. Penelitian ini menemukan bahwa dosis optimum karbon aktif adalah 8 gr/250 ml dengan waktu kontak selama 40 menit. Dalam penurunan kadar COD, karbon aktif ampas bubuk kopi mampu mengurangi kadar sebesar 60%, sementara penurunan kadar TSS mencapai 78%. Hasil ini menunjukkan bahwa penggunaan karbon aktif ampas bubuk kopi adalah alternatif yang efektif, ekonomis, dan ramah lingkungan dalam mengatasi masalah pencemaran limbah tempe.
Skenario Pengembangan Mini Bus Elektrik Sebagai Pengganti Angkutan Umum Konvensional di Kota Palangka Raya
Authors: Surbakti Bijaksana , Parasian Silitonga Sutan , Riani Desi
Published: December 2023

Saat ini trend penggunaan angkutan umum modern mutlak diperlukan. Penggunaan moda kapasitas tinggi, bahan bakar murah, efisien dan ramah lingkungan penting dikembangkan di Kota Palangka Raya. Adanya minat masyarakat untuk mencoba angkutan umum baru, sehingga tecapainya juga visi dan misi Pemerintahan Kota Palangka Raya. Penelitian ini juga bertujuan untuk membuat design suatu simulasi sistem angkutan umum modern menggunakan bus dengan sistem elektrik. Penelitian dimulai pada pengumpulan data primer dan data sekunder melalui pengamatan di lapangan selama 3 hari. Jumlah bus berdasarkan rute yang direkomendasikan, Hasil yang diperoleh dari penelitian ini bahwa skenario pengembangan mini bus elektrik terbaik untuk Kota Palangka Raya ada 5 (lima) rute dengan 56 titik halte yang direkomendasikan untuk Kota Palangka Raya. Jumlah armada yang direkomendasikan untuk semua rure berdasarkan waktu tempuh adalah 97 unit. Model mini bus elektrik yang direkomendasikan untuk Kota Palangka Raya berkapasitas 28 seat. Jam pelayanan mini bus elektrik ini dimulai pukul 05.30 WIB sampai 21.30 WIB Selain itu, adanya pengembangan moda angkutan umum mini bus elektrik ini, diharapkan akan meningkatkan tingkat pelayanan atau Level of Service (LOS) pada ruas jalan di Kota Palangka Raya.
Inisiatif Penanaman Mangrove sebagai Upaya Mitigasi Banjir Rob di Kabupaten Kendal : Studi Literatur
Authors: Afifah Anshah Silmi , Sari Mega Mutiara , Suhardono Sapta , Suryawan I Wayan Koko
Published: December 2023

Daerah pesisir Kabupaten Kendal menghadapi ancaman signifikan dari banjir rob dan abrasi. Inisiatif penanaman mangrove telah diperkenalkan sebagai solusi alami untuk mengatasi masalah tersebut. Studi literatur kualitatif ini bertujuan untuk menganalisis kekuatan, kelemahan, peluang, dan ancaman (SWOT) dari inisiatif tersebut. Hasil analisis menunjukkan bahwa mangrove memiliki peran penting dalam menjaga keseimbangan ekosistem pesisir dan bertindak sebagai benteng alami melawan abrasi. Meskipun demikian, masih ada hambatan dalam pelaksanaan dan pemeliharaan mangrove. Ditemukan potensi kolaborasi yang besar antara pemerintah, komunitas, dan organisasi lingkungan. Namun, tantangan eksternal seperti perubahan iklim dan aktivitas pembangunan berisiko mengurangi efektivitas inisiatif ini. Diharapkan kesadaran masyarakat dan dukungan lintas sektor dapat memperkuat keberlanjutan inisiatif ini.
Perbaikan Sistem Perawatan Mesin Forming dengan Metode FMECA dan RCM Berdasarkan Analisis OEE Pada PT XYZ
Authors: Akbar Waluyo Andrian , Widyaningrum Dzakiyah
Published: December 2023

PT XYZ is a manufacturing company operating in the automotive sector. One of this company's flagship products is train brake pads. In production activities there are several machines, including forming machines. Based on secondary data, it is known that this forming machine has the largest contribution to product defects. This research was conducted using the OEE, FMECA, and RCM methodology. The OEE methodology is used to identify the level of effectiveness of forming machines, the FMECA methodology is used to identify critical machines, and the RCM methodology is used to determine machine repair and maintenance intervals and determine the selection of tasks in maintenance activities. The research results show that the OEE value of the forming machine is 83.79%, which is below standard. Based on the FMECA analysis, it is known that there are 2 components that are classified as critical components, namely sheet loading and molding. So, an analysis of maintenance scheduling was carried out on these two components, it was found that the sheet loading component required maintenance every 352,016 minutes and component replacement every 11.58 days with task selection in the form of a directed time. On molding components, maintenance is carried out every 328.60 minutes and component replacement every 11.46 days with the task selection being failure discovery.
Transformation of Malaysian Shop Office and The Impact of Visual Comfort
Authors: Tan Hui Ping , Abdul Majid Roshida
Published: December 2023

This paper investigates the transformation of Malaysian shop offices over the last few decades, and the impact of visual comfort on their design and functionality. Shop offices are a prevalent building type in Malaysia, combining commercial and office spaces in the same structure. The rise of e-commerce and the need for visually appealing and functional spaces has driven the transformation in shop office design. This study examines the historical context of shop offices in Malaysia, the factors driving their transformation, and the concept of visual comfort, including its various elements. The study then analyzes the impact of visual comfort on the design and functionality of modern shop offices in Malaysia. The research findings provide insights into the importance of visual comfort in commercial space design and the factors driving the evolution of shop office design in Malaysia. Finally, the paper identifies challenges and opportunities for the continued development of visually appealing and functional shop offices in Malaysia.
Glocal Borders in Kenneth Branagh's Belfast (2021)
Authors: Sandrock Kirsten
Published: December 2023

Kenneth Branagh’s semi-autobiographical film Belfast (2021) tells the story of a young boy, Buddy, growing up in Belfast in the sectarian border zones that internally fissured the state of Northern Ireland. This article suggests that the movie’s critical success partly rests on the movie’s glocal approach to Belfast’s history, including its border zones. The film employs a number of aesthetic devices to turn the local experiences of Buddy into a global narrative about childhood, family and border zones. Among these tools are the use of self-referential framing devices, the child’s perspective and elements of nostalgia that link local history to transnational bonds of affection. By using a child's perspective, Belfast transcends the ruptures inherent in Belfast’s zones of division to create connections across cultural, ideological and physical spaces. Situated in a glocal framework, Buddy’s childhood symbolically embodies the experiences of a collective Irish diaspora, one that thinks back to its own or its family’s migrant experiences and turns it into a source of emotional belonging.
Mapping the Jural Border between Ireland and Northern Ireland
Authors: Doyle Oran
Published: December 2023

Northern Ireland challenges a Westphalian account of the world in which sovereign states inhabit discrete geographic spaces. Its constitutional future is not determined by the central UK Government, its external border is porous for people and open for goods, some parts of EU law continue to apply. The paper shifts the focus from unitary and coherent sovereign spaces to multiple, varied and overlapping jural spaces, shedding light on some of the challenges that would be faced in the context of Irish unification. Even in a politically unified Irish state, managing the jural border between Ireland and Northern Ireland would remain a key task. The paper outlines a new account of law’s relationship to geographical space, before analysing the border between Ireland and Northern Ireland. The paper concludes by addressing some structural issues that would need to be addressed if Irish unification were to occur.