bluuebunny/crossref_metadata_2025 huggingface dataset:
Variasi Temperatur Pencampuran terhadap Parameter Marshall pada Campuran Lapis Aspal AC-BC
Authors: M Aldi Muhtaibillah A  , Jasman Jasman  , Hamsyah Hamsyah  , Adnan Adnan
Published: September 2024

Mixing temperature has an important role in the performance of the asphalt mixture that has been made. If the mixing temperature is too low and causes the viscosity value to be high, it will make it difficult to carry out asphalt mixing and was studied in the laboratory for two months which aims to determine the effect of mixing temperature variations on the value of marshall parameters and determine the effect of temperature variations on the performance of AC-WC asphalt pavement mixing. Characteristics of Temperature Variations in AC-BC asphalt mixtures for temperature variations of 140, 150 and 160, from the results of testing vim at a temperature of 160 with a value of 6.63 does not meet specifications, at a VFB value at a temperature of 160 does not meet specifications with a VFB value of 64.25, for the value of stablity, VMA, flow, MQ all meet specifications. so it can be concluded that the greater the temperature can make the asphalt mixture ineffective or the quality of the AC-BC asphalt decreases. The effect of temperature variation on AC-BC asphalt mixture is not optimal because the greater the temperature parameter can reduce the quality of AC-BC. The results of the proof of the marshal test of several temperature variations that do not meet the specifications make some marsall tests not pass specifications and density results that are not solid.
Kajian Kuat Lekat Pada Beton Variasi Limbah Granit Sebagai Substitusi Parsial Agregat Kasar
Authors: Fahmi Firman Maulana
Published: September 2024

Infrastructure development contributes to increasing the competitiveness of domestic products, employment energy absorption, and regional growth. Therefore, a strong, rigid and stable construction is needed. The use of materials for construction needs to be considered, especially commonly used materials such as concrete. This research aims to analyze the effect of variations in granite content as a partial substitution for coarse aggregate on the bond strength of BRA (Concrete Recycled Aggregate) concrete. Experimental methods were used in this research. The concrete mix design uses a variety of granite waste with a content of 0%; 15%; 30%; and 45%. The test object used was a concrete cube with a side length of 20 cm. The bond strength of the concrete is tested using a Universal Testing Machine (UTM) and a dial gauge. Based on research, the maximum bond strength value is obtained at a granite content of 30%. The addition of granite waste causes an increase in the bond strength value. The bond strength value of concrete when slip occurs is 0.25 mm at 0% granite content; 15%; 30%; and 45% each valued at 14.61 MPa; 15.44 MPa; 18.62 MPa; and 17.15 MPa. Concrete bond strength value at maximum load at 0% granite content; 15%; 30%; and 45% each valued at 22.42 MPa; 22.59 MPa; 24.01 MPa; and 23.12 MPa.
Analisis Kualitas Pelayanan kepada Pelanggan PDAM Tirta Danau Tempe melalui Pendekatan Quality Function Deployment
Authors: Setiani Mutia Ana
Published: September 2024

This study aims to analyze the service quality of PDAM Tirta Danau Tempe in Wajo Regency using the Quality Function Deployment (QFD) method with the House of Quality (HoQ) approach. The research methods used include qualitative data collection through interviews and observations, and quantitative data through questionnaires filled out by 30 respondents from 650 PDAM customers. Validity and reliability tests were conducted to ensure data consistency, while HoQ analysis was used to link customer desires with the quality of service provided. The results show that the most important service attributes for customers are the PDAM's good reputation, timely office operation time, and effective communication by staff. However, some aspects such as the company's compliance with service promises and the availability of a comfortable waiting room need to be improved. The conclusion of this study is that there is a need to improve service quality through a thorough evaluation of these attributes to increase customer satisfaction and strengthen their loyalty. Technical recommendations include improving employee work ethics, handling customer complaints, and more appropriate employee placement to improve PDAM service performance.
Analisis Daya Saing Ekspor Indonesia Produk Kopi panggang ke Kawasan ASEAN Berdasarkan Metode Revealed Comparative Advantage
Authors: Favian Jihan Prastian  , Farida Pulansari
Published: September 2024

Export means transporting or bringing goods and services from one country to another coun-try. In order to evaluate how strong export competitiveness is and identify market opportunities, specific calculation methods and approaches regarding comparative advantage are needed. One of them is using the "revealed comparative advanced" (RCA) method, which provides an accu-rate picture of how competitive a product is in the international market. One measuring tool is the Balassa index, where a value of more than one (>1) indicates a strong level of competitive-ness for export products to the destination country. Conversely, a value less than one (<1) indi-cates low competitiveness and sales difficulties in that market. The calculation results show that Timor Leste has an average Balassa index of 60.685, followed by Brunei Darussalam with a Balassa index value of 12.526 and Malaysia of 4.987 and with a stable value, thus indicating good potential for exporters who want to market coffee products. roast them to the country. However, Thailand has little potential with a Balassa index of 1.944. In contrast, Singapore and the Philippines have an average Balassa index below 1, indicating there is no great potential as a profitable export market.
Pengawetan Sari Buah Mangga Arum Manis (Mangifera Indica L) Menggunakan Eugenol
Authors: Ery Fatarina Purwaningtyas  , Wafik Nur Maulina  , Sri Mulyaningsih
Published: September 2024

Sweet arum mango is one type of mango which when harvested has the highest vitamin C content of 7.53 ± 0.4 mg / 100 g. Processed sweet arum mango fruit products that have the potential to be developed are in the form of fruit juice. This is a consideration for researchers to conduct further research on the addition of eugenol preservatives with different concentrations of preservatives and storage times to produce better mango juice. Eugenol compounds have pharmacological activities as analgesics, anti-inflammatory, antimicrobial, antifungal, antiseptic, stimulant, so these compounds are widely used in the pharmaceutical industry. Based on the experimental results, optimal conditions for the use of eugenol occurred until day 2, where the addition of eugenol with treatment 3 as much as 1 ml amounted to 38.82% better when compared to other variations of eugenol addition.  The addition of eugenol preservatives cannot preserve the content of vitamin C in sweet mango juice even the content of vitamin C tends to decrease. Sweet arum mango juice has a shelf life of 12 days and total dissolved solids of more than 20%, so the resulting fruit juice does not meet SNI 7382:2009.
Tinjauan Manajemen Proyek Dalam Penentuan Skala Prioritas Pembangunan Jalan Di Kabupaten Kaur
Authors: Yunita Mauliana
Published: September 2024

Regency roads are local roads which do not include roads connecting the district capital to other districts, but their network is diverse as a link for local activities, namely connector roads between villages, between sub-districts, production center roads and environmental roads in residential areas. This research focuses on roads in Kaur Selatan District and Maje District, Kaur Regency, Bengkulu Province with a total length of 128.50 km with a total of 68 sections. There are several sub-district roads which are a road network that is integrated with national roads. In general, this road section is often used by various types of vehicles, from light to heavy vehicles. Utilization of roads that do not match their class and the influence of the weather climate in areas that are quite extreme result in landslides so that the road body becomes narrow and heavily damaged. As a result of damage to existing roads, community activities are hampered. The purpose of this research is to provide information to the Bengkulu Regency government in preparing priority planning, determining the type of pavement that is appropriate to the location of the road section and determining the calculation of the costs required. The results of research and calculations show that the cost required for road repairs is IDR. 70,788,844,000 for a period of 5 years. The priority scale consists of 17 sections with a cost of Rp. 57,541,204,000.
Pengaruh Penambahan Serat Ijuk Dan Plasticezer Sebagai Bahan Tambah Terhadap Nilai Karakteristik Beton
Authors: Ahmad Ahmad  , Jasman Jasman  , Hamsyah Hamsyah
Published: September 2024

Concrete is an artificial stone made from a mixture of cement, sand, aggregate and water. For this reason, this construction material is considered very important to continue to be developed. One effort to develop is by improving the weak properties of the concrete itself. From this, researchers will use additional materials such as fiber palm fiber and sika visconcrate in the concrete mixture. Fiber fiber itself has durable properties and does not rot easily in open conditions or embedded in the ground, while sika visconcrate is a chemical that is used as an additive in the mixture to increase the workability, quality and strength of concrete with the desired properties. The method used in this research is quantitative experimentation. The aim of this research is to determine the characteristics of concrete using palm fiber and sika visconcrate with variations of 3%, 5% and 7% from normal concrete. The results of the research show that the average compressive strength of normal concrete is 25,572 MPa, 3% SI+SV variation concrete has an average of 27,365 MPa, 5% SI+SV variation concrete has an average of 26,704 MPa, and 7% SI+ SV variation concrete The average is 26,044 MPa. The split tensile strength test results of normal concrete averaged 6.074 MPa, 3% SI+SV variation concrete averaged 6.444 MPa, 5% SI+SV variation concrete averaged 7.852 MPa, and 7% variation concrete averaged amounting to 8,148 MPa.
Analisis Tingkat Kerawanan Banjir di Kecamatan Koto Tangah, Kota Padang
Authors: Isra Iza Mahendra  , Dwi Marsiska Driptufany  , Dwi Arini
Published: September 2024

The research area is prone to flooding, which could potentially result in losses for the people of the research area. Based on this, it is important to map flood-prone areas, as a form of flood disaster mitigation effort to reduce the level of flood risk. Hazard mapping is an important stage in the process of disaster risk identification and analysis. Mapping flood-prone areas can use various methods or approaches. Approaches that can be used for assessing or mapping flood hazards are the geomorphological approach and community participation. This type of research is quantitative descriptive, namely a type of investigation that explains or explains a problem. Descriptive studies aim to explain populations, situations or phenomena accurately or systematically. Mapping flood hazards in the Koto Tangah District, Padang City. From the results of the analysis of the level of flood vulnerability above, the relationship between this research is that rainfall is too high and low river beds cause water to overflow into lowlands, causing the level of flood vulnerability to increase as time goes by. So The results obtained from the analysis of Flood Hazard Area Mapping are the area of ​​Koto Tangah sub-district is 22.017,43ha, by getting the level of non-prone areas with an area of ​​10.203.16ha, the level of less-prone areas with an area of ​​4.714.168ha, the level of vulnerable areas with an area of ​​3.990.458ha, the level of very vulnerable area with an area of ​​1.893,630ha. Koto Tangah District, Padang City has five levels of danger zones for flooding, based on the results of the parameter data used. Each parameter used greatly influences the level of flood risk in Koto Tangah District, Padang City, namely river buffer, land use, land height, land slope, soil type and rainfall. From the creation of flood prone levels in Koto Tangah sub-district, Padang city, areas with a very high risk of flooding are 10.68% with an area of ​​1892,630 ha, areas with a danger level of flood prone are 14.68% with an area of ​​3990,458 ha, areas with Kuang's flood-prone level is 21.40% with an area of ​​4714,168 ha, the area with a flood-safe level is 46.32% with an area of ​​10,203.16 ha.
Perencanaan Titik Hydrant Pada Gudang PT. Putraduta Buanasentosa Menggunakan Standart NFPA 14
Authors: Aditio Achmad Fauzi  , Aditya Pradana  , Dwi Novita Indirani  , Wanda Ardhani Sulistyo  , Dika Ayu Safitri
Published: September 2024

Awareness of potential hazards, risks of accidents, and the need for preventive measures is a must to create a safe and healthy working environment for all workers.  The choice to implement a hydrant system is seen as an effective preventive measure in addressing potential fire risks, which are a major threat to the warehouse environment.  Thus, this research planning has not only a purely academic purpose, but also seeks to make practical contributions to strengthening the application of the Principles of Occupational Safety and Health in the industrial sector.  The planning research was done by jumping directly into the field and the data source was obtained from interviews with local authorities.  This research describes the design of the hydrant system in order to be able and meet the safety standards set by the NPFA. The results of the conservation of the warehouse of PT. Putraduta Buanasentosa then the author was able to describe the building based on the construction of the building. The warehouse PT. Putraduta Buanasentoza requires hydrant boxes of 6 pieces. The water requirements for the fire protection system based on NFPA have been calculated by considering the building size as well as the risk of fire with hydrant 6 pieces and 1 hydrant pillar, requires 4800 liters of water/minute and to extinguish the fire in the event of a fire requires a time of 15 minutes where the required water requirements in 15 minutes is 72.000 litres of water.
Analisis Fundamental Makro, Struktur Modal, Struktur Kepemilikan Terhadap Nilai Perusahaan Dengan Profitabilitas Sebagai Variabel Intervening Pada Perusahaan Agri-Food Yang Terdaftar Di Bursa Efek Indonesia 2014-2023
Authors: Ruri Istia Damayanti  , Hwihanus Hwihanus
Published: September 2024

This study aims to analyze the effect of macro fundamentals, capital structure, ownership structure on firm value with profitability as an intervening variable in agri-food companies listed on the Indonesia Stock Exchange from 2014 to 2023. This research uses documentation studies as a data collection technique and for data processing, Smart-PLS (Partiral Lerast Squarers) is used. The results show that capital structure has a significant influence on firm value, while ownership structure does not show a significant influence. In addition, profitability is proven to be an intervening variable that strengthens the relationship between capital structure and firm value, but does not strengthen the relationship between firm size and firm value. These findings provide important implications for the management of Agri-Food companies in making decisions related to financing and ownership strategies to increase firm value.
Pengolahan Sludge IPAL Industri Kue dan Makanan Ringan dengan Metode Composting
Authors: Alessandra Nancy Wattimena  , Syadzadhiya Qothrunada Zakiyayasin Nisa
Published: September 2024

Waste sludge is sludge that contains a lot of solids resulting from solid-liquid separation from industrial waste. The waste sludge produced from the waste processing process will create new problems in handling because it can pollute the environment. This research will discuss the use of IPAL sludge originating from the Sludge Drying Bed (SDB) to be used as organic fertilizer. In the process of making organic fertilizer in the cake and snack industry by monitoring parameters such as color, texture, smell and properties of organic fertilizer during the process of making organic fertilizer. The characteristic results obtained in this research are blackish brown color, rough texture, earthy odor and the resulting moisture is dry. Thus, the use of WWTP sludge as organic fertilizer offers an innovative and industrial solution that contributes positively to the environment.
Desain Dan Perancangan Mesin Pengering Padi Dengan Pemanas Gas Elpiji Sistem Terpadu
Authors: Supriyono Supriyono  , Leo Aji Saputro
Published: September 2024

Technological development is urgently needed to handle rice drying, namely by designing and designing rice drying machines, by utilizing heating from burning LPG gas which is arranged in an integrated system. The purpose of this paper is to design and design a rice drying machine, selecting machine components and including analysis of the strength of the dryer shaft by knowing von Misses stress, displacement and safety factors.  The design of the rice drying machine uses 1 source of electric motor driving power to operate an integrated drying and heating system. With the power of 0.5 HP (0.37 kW) it is planned to be able to dry rice with a capacity of 30 kg/hour. The power generated by the electric motor is used to move pulley-1 (drive), which is transmitted using  V-belt transmission to move pulley-2 (gear box and dryer blower). The length of the first belt transmission (L) is 813 mm and the second is 1270 mm. And uses a chain transmission with type number 40 which has a distance of 12.70 mm with a chain length of 76 links. The bearing used is a radial ball bearing with a single row UCP 205. Based on the results of the analysis of the rice drying machine shaft using solidwork software, Von Misses stress value is 40.55 MPa, displacement value is 0.19 mm, and safety factor value is 13.07, so from the simulation results this rice drying shaft can be said to be safe in accepting workloads
The Implementation and Design of an Automatic LED Emergency Light System for Power Outages
Authors: TAREQ SAJJAD LIWAA
Published: September 2024

Growing demand for electricity savings has led to the development of an automatic LED emergency light system. It is based on providing light when the power is cut off. Once fully charged, the battery ceases charging, and in the event of a power failure, the LEDs are automatically powered by the battery. The project focuses on two primary functions: it automatically activates during power outages to give illumination, eliminating the need to search for the switch, and the battery rapidly begins recharging as the main power is restored. The emergency light is crucial due to the inconsistent voltage distribution and frequent power outages in operational regions of communities and diverse enterprises.
The system includes a power supply that converts 230V AC to 12V DC, a relay that uses a control pulse to alternate between connecting the battery to the LEDs and isolating it, and a rechargeable Li-ion battery that supplies power to the LEDs during blackouts. The parallel-connected LEDs light up during a power outage in the circuits. The circuit architecture shown here serves to mitigate the entire discharge of the battery, hence enhancing the battery's longevity.
Key components of the system include a step-down transformer, a bridge circuit to convert AC to DC, a Zener diode to maintain voltage stability, capacitors for energy storage, and various diodes to control current flow. The project highlights the advantages of LED emergency lights, such as efficiency, longevity, and minimal energy waste, though it acknowledges the higher initial cost and temperature sensitivity as disadvantages.
The automatic LED emergency light is suitable for use in homes, offices, retail shops, and other commercial settings. The project demonstrates a cost-effective and compact solution that enhances daily life by providing reliable lighting during power failures.
Pemanfaatan Limbah Cangkang Kerang sebagai Subtitusi Agregat Kasar dengan Bahan Tambah Superplasticizer terhadap Kuat Tekan
Authors: Muhammad Ilham Tahir  , Jasman Jasman  , Misbahuddin Misbahuddin  , Adnan Adnan
Published: September 2024

Parepare City is located on the coast with significant fisheries and maritime potential. The processing and consumption of shellfish in this city produces a lot of shellfish waste, which is often not utilized and accumulates into an environmental problem. To improve the properties of concrete, several types of additives that have certain functions are added to the concrete mixture, namely increasing the workability, durability, and hardening time of concrete. This study aims to determine the compressive strength of concrete and the composition of coarse aggregate of shells with superplasticizer added materials that are optimally produced. Using an experimental method carried out at the Laboratory of Structure and Materials, Muhammadiyah University of Parepare. The results showed that substitution of coarse aggregate with 5% shellfish waste and 0.5% superplasticizer increased the compressive strength of concrete at the ages of 7, 14, and 28 days. The 10% substitution still meets the compressive strength requirements at 28 days, although slightly lower than normal concrete. Substitution of shells up to 5% increases the compressive strength of concrete, and the 10% content is optimal, reaching the maximum value without significant decline. It is recommended that the use of shells as a substitute for coarse aggregate does not exceed 10% for optimal results and meets the planned compressive strength of 25 MPa.
Designing USU Student Center Post Pandemic COVID-19 with Tropical Architecture Approach
Authors: Andalucia Andalucia  , Rafika Dewi
Published: September 2024

University of Sumatera Utara (USU) is the one of the largest and the best universities in Medan which has full of facilities and infrastructure. Nevertheless, currently University of Sumatera Utara does not have a Student Center. The provision of a student center at a university is essential for the development of outstanding students. Furthermore, in the post pandemic COVID-19, humans need a healthier space or place to be live in. Activities that take place indoors require good air quality to prevent viruses from easily entering and thriving inside the room. The application of tropical architecture in the design of the USU Student Center is a consideration in creating a place suitable for post pandemic COVID-19 conditions, and it also serves as a solution for the climate in Indonesia.
Kajian Penerapan Arsitektur Hijau pada Perancangan Sekolah Alam
Authors: Karina Az-Zahra Marsaf  , Hilma Tamiami Fachrudin
Published: September 2024

The success of education for children is determined by education carried out from an early age. The purpose of education in general is to provide an environment that allows students to develop their talents and abilities optimally. Because every child has different abilities and talents. School is one source of children's learning, unfortunately, most schools today focus more on academic aspects and evaluation, while outdoor learning by utilizing nature as a learning medium can help explore children's hidden talents and potentials. The environment has an important role in children's growth and development, because children will first learn and understand various things through interaction with their environment. In this case, the environment becomes a source of learning that greatly influences the physical, skill, social, cultural, emotional, and intellectual development of children
From Blueprint To Reality: The Art Of Designing Vehicle Engines
Authors: Hussein Younus Razzaq  , Intisar Rasheed Saleh
Published: September 2024

The influence of engineering extends far beyond traditional boundaries with the evolving automotive sector and its increasing importance highlighted in this articles exploration of the intricate world of car engine design through historical insights and current advancements that significantly impact the automotive industry. Key elements in engine design such as thermodynamics, materials selection, fuel systems, emission control and stress analysis are introduced systematically as factors, for efficient and ecofriendly powertrain solutions. The industry’s dedication to finding solutions is clearly seen in how they consider sustainability factors during the engine design process. The study also delves into the influence of engine design within the sector alongside advancements and market trends to emphasize the crucial role of innovation in staying competitive and meeting consumer needs. Finally, the research proposes paths, for engine design exploration courting new challenges and uncharted territories that are poised to shape the evolution of vehicle propulsion.
Text reuse as cultural practice: intertextuality in the 18th-century digital archive
Authors: Roe Glenn
Published: September 2024

Text reuse, encompassing direct citations, paraphrases and allusions, represents a key aspect of intertextuality – a concept central to literary theory since the 1960s. This paper highlights how computational methods, particularly automatic text-reuse detection, can illuminate the complex system of intertextual exchange that informs 18th-century literary culture, focusing on significant works like the Encyclopédie and Voltaire's correspondence. By employing advanced techniques such as sequence alignment and social network analysis, we uncover hidden patterns of influence, citation strategies and the subtle interplay between originality and imitation in Enlightenment literature. The paper also considers the implications of these findings for modern understandings of authorship, originality and textuality, drawing connections to contemporary digital humanities practices. The paper ultimately aims to recontextualise the Enlightenment as a period of intense intertextual productivity, where the reuse of texts was not merely a scholarly exercise but a dynamic and essential component of literary creation.
Uso de recursos y carga socioeconómica asociada a adultos con vejiga hiperactiva en tratamiento farmacológico en España
Authors: Alcántara Antonio , Blasco Pedro , Díez-Itza Irene , Espín Jaime , Medina José , Caballero María
Published: September 2024

relación con los costes sanitarios directos e indirectos de adultos con el síndrome de la Vejiga Hiperactiva (VH) en tratamiento farmacológico en España.
Material y métodos: Se realizó un estudio de la carga de la VH desde la perspectiva del Sistema Nacional de Salud (SNS) español con un enfoque prevalente, que estima la carga de la enfermedad teniendo en cuenta un período temporal de 1 año, reflejando la carga socioeconómica asociada a adultos con vejiga hiperactiva en tratamiento farmacológico en España. Para ello se realizó una revisión de la literatura de estudios relacionados con la epidemiología y el uso de recursos y costes de la VH en España publicados entre 2004 y 2024. Los datos obtenidos fueron validados por un grupo multidisciplinar de expertos españoles. Se siguieron las recomendaciones de manejo y tratamiento de la VH descritos en las guías de la asociación europea de urología (EAU) para mujeres con síntomas del tracto urinario inferior (2024), y guías de la EAU para varones con síntomas del tracto urinario inferior. El modelo se desarrolló en Excel y se estructuró en tres secciones principales: carga epidemiológica, costes directos médicos y costes indirectos.
Resultados: Se estima que aproximadamente 5.164.369 personas padecen VH en España, de las cuales sólo el 7,35% (379.112) se encuentran en tratamiento farmacológico. El coste anual por paciente asociado al diagnóstico de VH fue de 1.312 €/paciente, de los cuales un 13,9% corresponderían a los costes de adquisición de fármacos, un 10,8% a los costes relacionados con los efectos adversos, un 4,5% a los costes de adquisición de absorbentes y un 61,9% a los costes atribuidos a visitas médicas. Los costes indirectos, considerando el absentismo laboral y el presentismo supondrían un 9% del total de los costes en adultos con VH en tratamiento farmacológico.
Conclusiones: La VH representa una carga económica importante para el SNS español, con una estimación de coste total de unos 497 millones de euros en 2023. Se destaca el bajo número de pacientes con VH en tratamiento farmacológico en España y la necesidad de investigar y desarrollar terapias más seguras que permitan un ahorro de los costes asociados al tratamiento.
Palabras clave: carga socioeconómica, síndrome de vejiga hiperactiva, uso de recursos, costes directos, costes indirectos.
Price Negotiating Chatbot on E-commerce website
Authors: prasad Gorantla Bhanu , G. Pravallika , K. Ashritha , K. Sathwika
Published: September 2024

The rise of internet purchasing in the last few years is quite remarkable. Despite this growth, not all aspects of internet buying have been perfected. For example, unlike in physical stores, you can't haggle with vendors about prices. A chatbot for product negotiations is now live. Customers are able to acquire a good deal on product(s) with the help of the chatbot. The approach might end up hurting either the goods seller or the customer's budget, as it affects a lot of different parts of online buying. We have devised an algorithm that, in conjunction with the forecast of previously accessible data, can offer a price in order to circumvent such scenarios. Using unrelated data elements or qualities or techniques that aren't a good fit for a certain dataset might reduce the accuracy of price prediction. In light of the fact that erroneous product price predictions may lead to significant financial losses for online retailers, these companies avoid relying only on price prediction algorithms. When data becomes too large or when a characteristic that was relied on the model's prediction becomes unavailable, certain models can fail. Then, in order to keep the model's accuracy and dependability intact, such modifications must be handled. We have made an effort to address some of these concerns in our chatbot system.
An Innovative Hybrid Approach to Forecasting Soluble Oxygen for Optimal Water Purification in Highly Concentrated Aquaculture
Authors: Mohammed Imran Shaik , D. Yashaswini , Ch. Sahasra , B. Gayathri
Published: September 2024

An important measure of the water's quality in an aquaculture setting is the concentration of dissolved oxygen. Disintegrating oxygen content prediction using conventional techniques is slow and inaccurate due to the complexity, nonlinearity, and dynamics of the process. This research develops a hybrid model that addresses these problems by combining the radiation gradient enhancement machine (LightGBM) with this simple rechargeable unit (Biru). The first step was to find the important parameters by using linear interpolation and smoothing. After removing superfluous variables, the LightGBM algorithm predicts dissolved oxygen in highly intensive aquaculture and establishes its relevance. Lastly, the attention approach was used to map the learning parameter matrices and weighting matrices, allowing various weights to be applied to the Biru's hidden states. The results show that the given prediction model can capture the upward trend of oxygen dissolution fluctuations over a 10-day period with a rate of accuracy reaching 96.28% in only 122 seconds. It takes the least amount of time to compare the model impacts of Biru-AAttention, LightGBM-GGRU, LightGBM-LSTM, as well as LightGBM-BBiru. The improved accuracy of its predictions makes it a valuable tool for controlling the water quality in intensive aquaculture.
Machine Learning for Cloud-Based Privilege Escalation Attack Detection and Mitigation with CATBOOST
Authors: AR. Sivakumaran , G. Sreeja , Ch. Poojitha , I. Ramya
Published: September 2024

The exponential growth in attack frequency and complexity in the past few years has made cybersecurity a major concern with the advent of smart devices. Cloud computing has changed the way businesses operate, but users may find it more challenging to use dispersed services, such as security systems, due to their centralization. Organizations and cloud service suppliers exchange massive amounts of data, which poses a significant risk of accidental or intentional disclosure of sensitive information. Because of their increased access and potential to do substantial harm, an antagonistic insider poses a serious threat to the company. Only approved individuals within the organization have access to sensitive data and assets. This research details a machine learning-based strategy for classifying insider threats and finding out-of-the-ordinary events that can indicate privilege escalation security issues. The system uses a systematic approach to detect these irregularities. Machine learning and prediction accuracy are both enhanced by ensemble learning, which considers several models simultaneously. Using anomaly and weakness detection, some studies have attempted to identify security issues or hazards associated with privilege delegation in network systems. However, the assaults cannot be definitely identified from this research. Ensembles for machine learning (ML) are suggested and assessed in this research. The objective of this endeavor is to classify insider assaults using machine learning approaches. The dataset it uses has been modified from many files beneath the CERT dataset. The dataset is subjected to four machine learning techniques: Light GBM, XG Boost, Ada Boost, and three Random Forest (RF) methods. In terms of overall performance, light was superior. In contrast, RF and AdaBoost are two algorithms that may be better at preventing assaults from inside, such as attacks using behavioral biometrics. Consequently, it is possible that various internal threats may be better classified by combining various machine learning algorithms. With a 97% dependability rate, the Light GBM method outperforms the other suggested techniques; RF, AdaBoost, and XG Boost all have 88% accuracy rates.
An Automated News Text Classification Information System
Authors: Premchander Munimanda , Deepthi Are , Swathi Bathula , B. Srija
Published: September 2024

An information system for the categorization of news texts using machine learning algorithms is being planned and developed in this project. An online platform and an automated categorization system make up the data system in question. We have preprocessed the text data. In order to train classifiers using the grid search method, many experiments were carried out. We have tested four different categorization algorithms: naïve Bayesian, logistic regression, random forest, and artificial neural network. Several measures, including F-score, recall, and precision, have been used to assess the trained classifiers' classification quality. An additional goal in developing the website was to provide easy access to the information system.
Miocardiopatía dilatada al final de la gestación
Authors: Laffita Batista Alfredo Antonio , Ferrera Martínez Yurien
Published: September 2024

Introducción: La miocardiopatía en el periparto es un trastorno poco común asociado al embarazo tardío y al puerperio, con consecuencias potencialmente letales. El cuadro clínico es el de una insuficiencia cardiaca que puede ser difícil de diagnosticar porque los síntomas suelen ser similares a los de un embarazo normal. La etiología es desconocida, aunque se ha descrito que puede relacionarse con la alteración en el procesamiento de la prolactina, el desequilibrio angiogénico y procesos inflamatorios o inmunológicos. Objetivo: Mostrar cómo se realizó el diagnóstico y la conducta seguida en una gestante atendida en el Hospital General Cheiko, en la República de Djibouti, con el diagnóstico de miocardiopatía dilatada. Caso clínico: Gestante de 38 años, con edad gestacional de 36,6 semanas, que acude al departamento de emergencias por cifras elevadas de tensión arterial. Pocas horas después comienza con manifestaciones de insuficiencia cardiaca y en las investigaciones se diagnostica una miocardiopatía dilatada. La cardiomegalia regresó considerablemente, así como la congestión pulmonar, por lo que al quinto día se regresa al servicio de obstetricia. A los 11 días se egresa del hospital con seguimiento por consulta de cardiología y con su niño en buenas condiciones. Conclusiones: Si se logra realizar el diagnóstico oportuno de esta grave entidad en las gestantes, y se impone un tratamiento precoz e intensivo, es posible mejorar los resultados perinatológicos del binomio materno fetal.
Envenenamiento por mordedura de Latrodectus mactans o araña viuda negra en un paciente pediátrico
Authors: Flores Hernández Gabriela Alejandra , Miralda Méndez Scheybi Teresa
Published: September 2024

Introducción: El envenenamiento por mordedura de Latrodectus mactans o araña viuda negra en niños se manifiesta clínicamente con alta neurotoxicidad. Caso clínico: Paciente masculino de 10 años, procedente del área rural, con historia de 4 horas de evolución de haber sufrido mordedura por araña en el dorso de la muñeca derecha mientras recolectaba leña. Inmediatamente presentó dolor intenso en el sitio de la mordedura, tórax y abdomen, hasta dolor corporal generalizado; además, náuseas, vómitos y edema periorbitario bilateral. Al examen físico presentaba además taquicardia, taquipnea, aunque estaba normotenso y afebril, con cambios inflamatorios en muñeca afectada con presencia de punto blanco y halo hiperémico o lesión de tiro al blanco. Se encontró leucocitosis, neutrofilia, linfopenia, con pruebas de función renal y hepáticas sin alteraciones. Fue ingresado por sospecha de envenenamiento por mordedura de Latrodectus mactans. El tratamiento fue sintomático y se administró, aunque de forma tardía, debido a limitaciones hospitalarias, el antídoto Inmunoglobulina monovalente antiarácnido. La mejoría clínica fue favorable, sin reporte de complicaciones. Conclusiones: El envenenamiento por Latrodectus mactans puede producir un amplio espectro de manifestaciones clínicas y alteraciones en exámenes de laboratorio secundarias a la respuesta inmune, la edad y la cantidad de α-latrotoxina inoculada en relación con la proporción de la superficie corporal, que podrían ponen en riesgo la vida del paciente. Los autores recomiendan, ante la sospecha de un paciente pediátrico con envenenamiento por este arácnido, derivar de inmediato a un servicio de urgencias.
Cateterismo ureteral en pacientes con uropatía obstructiva alta
Authors: Aguila Rodriguez Yosvani , Méndez López Vilma de la Caridad , Hechavarría Ramón Silvia Isabel
Published: September 2024

Introducción: La uropatía obstructiva es una de las enfermedades más frecuentes del trato urinario que produce sus efectos por diversos factores y que su interrelación altera tanto la hemodinámica renal como el corporal total. Objetivo: Determinar los resultados del cateterismo ureteral en pacientes con uropatía obstructiva alta en el Hospital Clínico Quirúrgico Celia Sánchez Manduley de Manzanillo, Cuba, en el periodo comprendido de enero 2018 a diciembre 2022. Métodos: Se realizó un estudio descriptivo, retrospectivo de corte transversal. El universo estuvo constituido por 124 pacientes a los cuales se les diagnosticó de algún tipo de uropatía obstructiva alta según criterios de inclusión/exclusión. Resultados: La edad de más incidencia estuvo entre 36 y 45 años; las principales causas de uropatía obstructiva alta que llevaron al cateterismo ureteral fueron la litiasis piélica (37 %) tanto en hombres (26,6 %) como en mujeres (10,4 %). El 42,8 % de los pacientes estudiados presentó complicaciones asociadas al cateterismo ureteral, la más frecuente fue la colonización bacteriana del catéter. En el 64,6 % de los casos, el tutor permaneció por menos de un mes; casi la totalidad de los mismos fue retirado por vía endoscópica. Conclusiones: El cateterismo ureteral protege en gran medida la vía urinaria superior, y evita la progresión hacia la insuficiencia renal o a la pérdida de la unidad renal. El tiempo de permanencia del catéter fue corto, y la colonización bacteriana del mismo fue frecuente.
Kinetic Study of the Formation Process of Ni-Zr Alloys
Authors: Cen Weifu , He Xin
Published: September 2024

In this study, Ni-Zr alloy glass is chosen as the research object, and we use the molecular dynamics method to simulate and study the microstructure evolution of Ni-Zr alloy at different temperatures. The computational analysis carried out using LAMMPS, and investigated the effect of five different cold speeds on the amorphization potential of Ni-Zr. Additionally, the structural properties of Ni-Zr amorphous clusters at different cold speeds were elucidated. The results shown that cold speed is a key factor influencing the ability of Ni-Zr to form amorphous. Furthermore, amorphous formation is more likely to occur at higher cold speeds. The formation of amorphous is facilitated under the condition of higher cold speeds. By investigating the microevolutionary process and the relationship between structural entropy and temperature, it can be seen that the entropy value of the structure shows an increasing trend with the increase of temperature and cold speed. This indicates that the structure's instability increases with increasing cold speed, which is favorable to the glass-forming ability of Ni-Zr. The kinetic process and structural analysis facilitate an in-depth comprehension of the microstructural evolution law and evolution mechanism of the Ni-Zr alloy, thereby providing a more reliable theoretical basis for the application and optimization of this material.
Sture Bolin
Authors: Odén Birgitta
Published: September 2024

Historian and numismatist Sture Bolin (1900-63) spent his career in Lund. He succeded Lauritz Weibull as professor of history in 1938 and later established Sweden's first university department of history.

Bolin was a political conservative, a nationalist and an active member of the Swedish National Youth Association (SNU) from his teens onward. He was inspired by conservative French restoration authors de Bonald and de Maistre. He was not very interested in German nationalism, and nor did he sympathise with Nazism.

After Germany invaded Denmark and Norway in 1940, Bolin left the SNU. His contemporaries did not see him as a German supporter.

In 1996, more than 30 years after Bolin died, historian Sverker Oredsson described Bolin as an "active anti-democrat, racist and i.a. ideologue for the Swedish National Youth Association". Students in Lund were markedly pro-German during the war, for which Oredsson pointed to propaganda before the war with Bolin as alleged ideologue.

Oredsson's judgement of Bolin became widely disseminated despite the fact that it has no support in the sources. The idea of Sture Bolin as a proto-Nazi propagandist is an historical factoid sensu Martin Kylhammar, that is, an unproven statement presented in an authoritative publication with wide distribution. There is in fact nothing to suggest that Bolin's influence made students in Lund during the war more pro-German.
Änkedrottning Hedvig Eleonoras livgeding 1660-1719
Authors: Brunius Jan , Asker Björn
Published: September 2024

(The principality of Hedvig Eleonora, dowager queen of Sweden 1660-1719.)

Hedvig Eleonora, princess of Holstein-Gottorp, born in 1636, married the Swedish king Charles X Gustav in 1654 and became a widow already in 1660. As a dowager queen she was allotted parts of the Swedish provinces Uppland, Västmanland, Södermanland and Östergötland for her maintenance (Swed. "livgeding", Germ. "Leibgedinge"). She governed her lands as an independent principality with the help of a governor and several bailiffs until her death in 1715.

This paper gives for the first time a description of the administration and the economy of her lands. The incomes were mainly based on grain rents which were sold to merchants, brewers and foundry proprietors in central Sweden. The expenses were often caused by building costs for the many palaces in the area. The paper ends with a survey of the remaining archives of the "livgeding".
Influence of Growing Substrates on the Production Potential and Post-Harvest Storage Capacity of Tomato Fruits from the Buzău 1600 Variety
Authors: Camelia Aurora Simionescu , Arshad Adnan , Ionuț Ovidiu Jerca , Elena Dobrin , Elena Maria Drăghici
Published: September 2024

This study investigated the influence of various growing substrates on the dry matter and total sugar content of Buzău 1600 tomato fruits, a variety developed at the Buzău Vegetable Research Station and preserved at the Buzău Plant Genetic Resources Bank, Romania. The substrates tested included V1 (Control - Coco peat), V2 (Perlite 2mm), V3 (Perlite 2mm + peat), V4 (Perlite 4mm), V5 (Perlite 4mm + peat), V6 (Perlite 5mm), and V7 (Perlite 5mm + peat). The study further evaluated the effects of a 10-day storage period at 10°C on the fruits grown in V1, V4, V5, V6, and V7 substrates. Results showed that fruits from the V1 (Control - Coco peat) substrate retained more water and had the lowest dry matter content (6.83%), likely due to the higher water retention capacity of peat. In contrast, fruits grown on V4 (Perlite 4mm) and V6 (Perlite 5mm) had a significantly higher dry matter content (7.40% and 7.39%, respectively), indicating better water drainage and aeration in perlite. Mixed substrates (V3 and V5) combining perlite and peat provided an optimal balance between moisture retention and aeration, with V3 (Perlite 2mm + peat) exhibiting the highest dry matter content (7.47%). For total sugar content, fruits from V6 (Perlite 5mm) displayed the highest values at harvest (3.36%), which were well-maintained after storage (3.25%). The sugar-to-acidity ratio was also enhanced in mixed perlite and peat substrates, particularly in V3 (Perlite 2mm + peat), which achieved the highest sugar/acid balance, making the fruits sweeter compared to those grown in the control substrate. Overall, the study concluded that the combination of perlite and peat, particularly in the V3 and V5 treatments, significantly improved fruit quality in terms of dry matter content, sugar content, and sugar-to-acidity ratio, while perlite alone (V6) demonstrated superior sugar retention after storage.
plata hispanoamericana y el rol del nuevo mundo en la economía global premoderna 1500-1800
Authors: Irigoin Alejandra
Published: September 2024

La plata era una necesidad pública en Asia e indispensable para el comercio Europeo con ella. Mientras en Asia la plata no tenía sustitutos, en Hispanoamérica estaba disponible en una abundancia extraordinaria. Los historiadores han estudiado aspectos de la producción y de su comercio, generalmente en una escala regional o local. Así, la minería es analizada separadamente del comercio, y el comercio separado del desarrollo de la economía; más aun, la plata es raramente diferenciada de la moneda de plata. Para la economía internacional, la cantidad de plata americana fue mucho menos importante que su calidad. Ello hizo de esas monedas el medio de pago preeminente en la economía internacional, y el estándar para un sistema de pago internacionales que compensaba los desequilibrios en el comercio marítimo de larga distancia.
Este ensayo revisa el rol de Hispanoamérica colonial en la economía internacional a través del comercio con la moneda de plata y desarrolla algunas implicaciones de la expansión económica y la integración de mercados –un crecimiento Smithiano- que propicio. Con la exploración de los aspectos monetarios del comercio internacional, la discusión también revisita algunas cuestiones clásicas de la historiografía; y subraya algunos efectos macroeconómicos para la economía colonial que califican recientes interpreta- ciones sobre niveles de vida y legados coloniales, y aspiran a abrir nuevas preguntas de investigación.
Historia empresarial en América Latina: debates, perspectivas y agendas en el siglo XXI
Authors: Lluch Andrea
Published: September 2024

Este ensayo provee una síntesis del desarrollo del campo de la historia empresarial en América Latina, destacándose los puntos centrales de la trayectoria en las últimas décadas. Para ello repasa los temas y debates centrales en las últimas décadas. Al finalizar propone una posible agenda de temas de investiga- ción para los años futuros.