bluuebunny/crossref_metadata_2025_split huggingface dataset:
EFFECT OF SOCIAL MEDIA MARKETING ON PURCHASE INTENTIONS WITH BRAND AWARENESS AND PERCEIVED QUALITY AS INTERVENING VARIABLES AT ASTON BELLEVUE RADIO DALAM HOTEL IN JAKARTA
Authors: Anjarani Puti Minang , Mumin Adhi Trirachmadi , Bilqis Linda Desafitri Ratu , Ingkadijaya Rahmat 
Published: January 2024

Social media plays a role in adding value to the attractiveness of two-way communication between companies and their consumers so as to increase consumer closeness to certain brands or brands. The ASTON Bellevue Radio Dalam hotel uses social media Facebook and Instagram as a marketing tool to introduce the ASTON Bellevue Radio Dalam brand to the public. At the beginning of the establishment of the ASTON Bellevue Radio Dalam hotel, the use of social media was still not actively used. In addition, at the beginning of its establishment, the ASTON Bellevue Radio Dalam hotel was also affected by the Covid-19 pandemic, resulting in a significant decrease in occupancy rates. Hotel ASTON Bellevue Radio Dalam is pursuing various strategies including increasing the amount of social media marketing activity to market and promote Hotel ASTON Bellevue Radio Dalam. The use of social media marketing also allows consumers to have an image and perception of the good quality of the ASTON Bellevue Radio Dalam hotel. The purpose of this study was to analyze social media marketing on purchase intention with brand awareness and perceived quality as intervening variables at the ASTON Bellevue Radio Dalam hotel, Jakarta.
According to the research that has been done, it is known that social media marketing directly has a significant influence on brand awareness, perceived quality, and purchase intention. In this study it can also be seen that brand awareness directly has a significant effect on purchase intention and perceived quality directly has a significant effect on purchase intention. However, on the results of testing the direct effect of the relationship between variables, it is known that the results of brand awareness have no significant effect on perceived quality. In testing the indirect effect, brand awareness as a mediating variable indirectly has a significant effect and has a relationship between social media marketing and purchase intention. In addition, it is also known that perceived quality as a mediating variable indirectly has a significant effect and has a relationship between social media marketing and purchase intention.
Lightweight steering equipment based on prestressed modal analysis
Authors: Wang Yonggang 
Published: January 2024

As the key component to control the driving direction of the vehicle, the steering device always bears large vibration and load. In order to improve structural performance and reduce costs, a multi-objective optimization method based on the results of prestressed modal analysis was proposed, which can achieve significant lightweight and cost-effectiveness improvement. Based on the principle and working characteristics of the steering device, the minimum value of mass, minimum value of maximum stress, maximum value of equivalent stiffness were set as optimization objectives. Through finite element analysis, the prestressed modal module was constructed, and the strength and modal characteristics of the steering device were obtained. In order to verify the accuracy of prestressed modal analysis, the vibration testing experimental platform was built in a non free state. The excitation and response signals can be obtained through sensors and data acquisition devices and used as input and output data. According to the comparative analysis of simulated vibration modes, it can be concluded that the coupling analysis of strength and mode is more in line with actual boundary conditions and has high reliability. The DOE (Design of Experience) method was adopted to construct discrete corresponding values between design variables and optimization objectives based on the results of prestressed modal analysis. In order to better evaluate the cost-effectiveness of lightweight, a comparative analysis was conducted on the results of primary and secondary lightweight. The results show that the prestressed modal analysis method can achieve good dynamic analysis accuracy. Without reducing strength and equivalent stiffness, the mass of the steering device can be reduced by 14 %, achieving high economic benefits.
Assessment of resampling methods on performance of landslide susceptibility predictions using machine learning in Kendari City, Indonesia
Authors: Aldiansyah Septianto , Wardani Farida 
Published: January 2024

Abstract

Landslide susceptibility projections that rely on independent models produce biased results. This situation will worsen class balance if working with a small population. This study proposes a landslide susceptibility prediction model based on resampling, cross-validation, bootstrap, and random subsampling approaches, which is integrated with the machine learning model, generalized linear model, support vector machine, random forest, boosted regression trees, classification and regression tree, multivariate adaptive regression splines, mixture discriminate analysis, flexible discriminant analysis, maximum entropy, and maximum likelihood. This methodology was applied in Kendari City, an urban area which faced destructive erosion. Area under the ROC curve (AUC), true skill statistics (TSS), correlation coefficient (COR), normalized mutual information (NMI), and correct classification rate (CCR) were used to evaluate the predictive accuracy of the proposed model. The results show that the resampling algorithm improves the performance of the standalone model. Results also revealed that standalone models had better performance with the CV algorithm compared to the Bt and RS algorithms. The Bt-RF model excels in statistical measures (AUC = 0.97, TSS = 0.97, COR = 0.99, NMI = 0.50, and CCR = 0.93). Given the admirable performance of the proposed models in a moderate scale area, promising results can be expected from these models for other regions.
Prediction of Antibiotic Resistance in Patients With a Urinary Tract Infection: Algorithm Development and Validation
Authors: İlhanlı Nevruz , Park Se Yoon , Kim Jaewoong , Ryu Jee An , Yardımcı Ahmet , Yoon Dukyong 
Published: January 2024

Background
The early prediction of antibiotic resistance in patients with a urinary tract infection (UTI) is important to guide appropriate antibiotic therapy selection.

Objective
In this study, we aimed to predict antibiotic resistance in patients with a UTI. Additionally, we aimed to interpret the machine learning models we developed.

Methods
The electronic medical records of patients who were admitted to Yongin Severance Hospital, South Korea were used. A total of 71 features extracted from patients’ admission, diagnosis, prescription, and microbiology records were used for classification. UTI pathogens were classified as either sensitive or resistant to cephalosporin, piperacillin-tazobactam (TZP), carbapenem, trimethoprim-sulfamethoxazole (TMP-SMX), and fluoroquinolone. To analyze how each variable contributed to the machine learning model’s predictions of antibiotic resistance, we used the Shapley Additive Explanations method. Finally, a prototype machine learning–based clinical decision support system was proposed to provide clinicians the resistance probabilities for each antibiotic.

Results
The data set included 3535, 737, 708, 1582, and 1365 samples for cephalosporin, TZP, TMP-SMX, fluoroquinolone, and carbapenem resistance prediction models, respectively. The area under the receiver operating characteristic curve values of the random forest models were 0.777 (95% CI 0.775-0.779), 0.864 (95% CI 0.862-0.867), 0.877 (95% CI 0.874-0.880), 0.881 (95% CI 0.879-0.882), and 0.884 (95% CI 0.884-0.885) in the training set and 0.638 (95% CI 0.635-0.642), 0.630 (95% CI 0.626-0.634), 0.665 (95% CI 0.659-0.671), 0.670 (95% CI 0.666-0.673), and 0.721 (95% CI 0.718-0.724) in the test set for predicting resistance to cephalosporin, TZP, carbapenem, TMP-SMX, and fluoroquinolone, respectively. The number of previous visits, first culture after admission, chronic lower respiratory diseases, administration of drugs before infection, and exposure time to these drugs were found to be important variables for predicting antibiotic resistance.

Conclusions
The study results demonstrated the potential of machine learning to predict antibiotic resistance in patients with a UTI. Machine learning can assist clinicians in making decisions regarding the selection of appropriate antibiotic therapy in patients with a UTI.
efficiency of railway concessions and the regulation of service quality
Authors: Victorino T. , Bertussi G. 
Published: January 2024

This study evaluated the efficiency of railway transport under three different aspects: technical efficiency, quality of service efficiency and economic efficiency of Brazilian railway concessions from 2006 to 2018 using the Data Envelopment Methodology - DEA. As a result of the proposed analysis, it was found that the current quality of service indexes established in Concession Contracts were not able to encourage quality of service improvements. It was also observed that concessionaires with better technical efficiency are those with lower economic efficiency, indicating that there are gains in profitability with the worsening of the service's quality.
ESPAÇOS DE VIVÊNCIAS DE UMA COMUNIDADE RIBEIRINHA NA AMAZÔNIA PARAENSE
Authors: Souza Agriane Caldeira 
Published: January 2024

Este trabalho é o resultado de uma pesquisa mais ampla de mestrado que tem como foco apresentar as diferentes dinâmicas vivenciadas por moradores de uma comunidade ribeirinha da Amazônia Paraense, chamada de Carapanatuba, no interior do município de Santarém. O modo de vida e a dinâmica territorial das populações ribeirinhas são objetos de estudo em várias ciências, e aqui somos pautados na ciência geográfica, com auxílio de autores como Santos (2002), Souza, (2018) e Tuan (2012) nas abordagens de categorias de espaço e lugar, que amparam para a compreensão dos espaços de vivência dos moradores de Carapanatuba. Para a aquisição das informações foram realizados trabalhos de campo, com o uso de entrevistas e de outros instrumentos como celular, caderno de campo, entre outros. A Fenomenologia também foi utilizada como método de análise, pois cria pontes para que tenhamos acesso às informações e às percepções mais apuradas para ouvir, olhar, sentir, perceber e avaliar todos os fenômenos que transpassam a pesquisa. Mediante as observações e dos diálogos realizados durante o trabalho sobre as vivências dos pescadores com seus espaços/lugares de vida, é perceptível a relação afetivas dos pescadores para com a sua casa, que para eles é vista como um “porto seguro”, com as suas embarcações, com a comunidade, com o rio. E que nas pequenas práticas cotidianas em que são socializados os saberes sobre a dinâmica da natureza, é onde se constroem relações simbólicas e afetivas para com seus lugares de vida e trabalho.
Existence results for some classes of differential systems with "maxima"
Authors:   Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Lecce, Italia. Email: elisabetta.mangino@unisalento.it., Mangino Elisabetta , Pascali Eduardo ,   Dipartimento di Matematica e Fisica “Ennio De Giorgi”, Università del Salento, Lecce, Italia. Email: eduardo.pascali@unisalento.it.
Published: January 2024

Local existence of solutions of initial value problems associated with a new type of systems of differential equations with “maxima” are investigated. Keywords: Systems of differential equations with "maxima", initial value problems, local existence of solutions.
DOCKING AND MD OF GOTU KOLA (Centella asiatica L.) COMPOUNDS TO AT1 RECEPTORS AS ANTIHYPERTENSIVES
Authors: Dinata Deden Indra 
Published: January 2024

Non-communicable diseases, including hypertension, are a significant source of health issues in developed nations[MOU1] . Angiotensin II Receptor Blocker (ARB) is frequently used as the first-line treatment for hypertension. ARB works by inhibiting Angiotensin II which can cause vasoconstriction of entire blood vessels[l2] . This study aimed to find lead compound of 54 compounds obtained from gotu kola (Centella asiatica L.) in order to determine the antihypertensive activity. The target of drug action chosen in this study was the type 1 angiotensin II receptors (AT1). Molecular docking and molecular dynamics simulation were chosen as the methods in this study to predict the interaction and the affinity and stability of the interaction. Based on the results of molecular docking, it was found that the compound of campesterol, centellasaponin B, and corosolic acid gave good affinity to the targets. The test ligand that the Ki and DG values were close to the natural ligand (Olmesartan) campesterol with a value of -10.79 kcal/mol and 12.28 nM. Meanwhile, in the molecular dynamics simulation test, it was found that corosolic acid has good interaction stability with the targets and was constant from the beginning of the simulation to 100 ns, while for MMGBSA centellasaponin B the lowest total energy value was -71.4347 kcal/mol. It was concluded that the gotu kola (Centella asiatica L.), compound corosolic acid, and centellasaponin B had the potential as a lead compound that had affinity and stability for the interaction with the AT1 receptor as antihypertensives.
Antioxidant Activity, Sun Protection Factor and Phytochemical Properties of Different Parts Sawo Walanda (Pouteria Campechiana (Kunth.) B.) Extract
Authors: Fitriansyah Sani Nurlaela , Fadhilah Syifa , Ruslan Komar , Hartati Rika , Fidrianny Irda 
Published: January 2024

AbstractUV radiation can lead production of Reactive Oxygen Species (ROS) on the skin and can cause negative effects1. Sun protector and antioxidant ingredients are needed to protect the skin2. Phenolic compounds and flavonoids have been used as sun protectors and as antioxidants3. Pouteria campechiana is known for its high abundance of phenolic compounds4. This study reported the phytochemical group, total phenol and total flavonoid content, antioxidant activity, and sun protector factor of ethanol extracts of pulp, seed, leaves, and twigs of Pouteria campechiana. Determination of antioxidant activity, sun protection factor, and total phenol and total flavonoid content were carried out using UV-visible spectrophotometry. Crude drugs and extract of pulp, seed, twig, and leaves P.campechiana containing phenolic group, tannin, and flavonoid. The leaf extract had the highest total phenolic content, while the highest total flavonoid content was in the seed extract. All of the extracts tested had very strong antioxidant activity indicated by the Antioxidant Activity Index (AAI) to DPPH value, >2. At a concentration of 1000 µg/mL, the leaf extract showed the highest SPF value, 16.01 ± 0.38.The conclusion, the leaf extract had the potential to further as a natural antioxidant, and sun protector. AbstrakPaparan radiasi UV dapat meningkatkan produksi Reactive Oxygen Species (ROS) sebagai radikal bebas dan dapat menimbulkan efek negatif pada kulit. Dibutuhkan senayawa aktif sebagai fotoprotektor dan senyawa penangkal radikal bebas yang disebut antioksidan untuk melindungi kulit. Golongan senyawa fenol dan flavonoid dapat menyerap radiasi UV dan menangkal radikal bebas. Pouteria campechiana dilaporkan mengandung senyawa fenol. Penelitian ini melaporkan golongan senyawa kimia, kadar fenol dan flavonoid total, aktivitas antioksidan terhadap DPPH dan aktivitas fotoprotektor yang menggunakan parameter nilai Sun Protector Factor (SPF) dari ekstrak etanol daging buah, biji, ranting dan daun Poteria campechiana. Ativitas antioksidan, nilai SPF, kadar fenol total, dan flavonoid total diukur secara spektrofotometri UV-Sinar tampak. Hasil penelitin menunjukkan simplisia dan ekstrak etanol daging buah, biji, ranting dan daun P.campechiana mengandung golongan senyawa fenoli, tanin, dan flavonoid. Ekstrak etanol daun memiliki kadar fenol total tertinggi, sedangkan kadar flavonoid total tertinggi ada pada ekstrak etanol biji. Keempat ekstrak tergolong pada antioksidan sangat kuat, dengan parameter nilai AAI >2. Pada konsentrasi 1000 µg/mL, ekstrak daun menunjukkan nilai SPF tertinggi yaitu sebesar 16,01 ± 0,38. Kesimpulan, ekstrak etanol daun P.campechiana lebih berpotensi untuk dikembangkan sebagai bahan baku aktif antioksidan alami dan fotoprotektor.
Metode KLT Video Densitometri untuk Penetapan Kadar Tiamfenikol dalam Sirup Kering
Authors: Rachmawati Winasih , Pratiwi Ellen Rachmatunnisya , Yuliantini Anne 
Published: January 2024

Video densitometri merupakan metode analisis kuantitatif densitometri dengan prinsip pemindaian optik elektronik. Kromatografi lapis tipis (KLT) dapat menghasilkan data pemisahan yang cepat dan desain instrumen sederhana secara simultan, sehingga meningkatkan sensitivitas dan kompatibilitas dengan analisis data. Metode ini sederhana, murah, dan cepat untuk menghitung bercak pada pelat KLT. Penelitian ini bertujuan untuk memperoleh metode analisis penentuan thiamphenicol dalam sirup kering. Untuk tujuan ini, KLT video telah dikembangkan dan divalidasi. Analisis tiamfenikol tersebut dilakukan melalui beberapa tahap, antara lain optimasi kondisi KLT, perekaman bercak KLT dengan kamera, analisis bercak dengan ImageJ, validasi metode analisis, dan analisis tiamfenikol dalam sirup kering. Kondisi optimum untuk KLT menggunakan pelat silika gel GF254 dengan fase gerak etil asetat:kloroform:metanol (7,5:2:0,5, v/v/v). Deteksi dilakukan di bawah lampu UV 254 nm, kemudian difoto menggunakan kamera digital Sony Alpha A5100 dengan sensitivitas ISO 100, titik fokus 50 mm, aperture f/6, dan shutter speed 1/15 detik. Gambar yang diambil dianalisis menggunakan perangkat lunak ImageJ untuk menentukan nilai AUC setiap bercak. Uji selektivitas menghasilkan nilai α lebih besar dari 1,5. Hasil validasi metode diperoleh persamaan regresi y = 1.7481x + 16498 (r = 0,9995; Vx0 = 0,80%). Batas deteksi dan batas kuantitasi masing-masing sebesar 21,78 dan 72,60 bpj. Presisi (%RSD) dalam satu hari dan antar hari masing-masing adalah 1,07 dan 1,34%. Akurasi dilakukan dengan menggunakan simulasi sampel untuk mendapatkan persen perolehan kembali direntang 96,62 - 100,91%. Kadar tiamfenikol ditentukan pada tiga produk sirup kering dan bervariasi masing-masing sebesar 99,26%, 101,25%, dan 101,81%. Metode KLT video densitometri dapat digunakan sebagai metode alternatif analisis tiamfenikol sirup kering.
Diseño de experiencia de usuario para la transferencia de conocimientos en entornos de realidad virtual
Authors: González Hernández Nancy Yeraldi , Victoria-Uribe Ricardo 
Published: January 2024

La realidad virtual permite al usuario acceder experiencias variadas en entornos seguros y libres de riesgos, a partir de actividades lúdicas, lo cual, repercute positivamente como una herramienta en la transmisión de conocimientos dirigida a las personas que interactúan en estos ambientes digitales. El objetivo del presente artículo es determinar e identificar aspectos ergonómicos de diseño que estimulen positivamente la experiencia de usuario en ambientes de realidad virtual para la transferencia de conocimientos sustentables de manera sencilla y contextualizada.
La documentación teórica – metodológica aborda áreas de conocimiento que interactúan entre sí, tales como: arquitectura de información, ergonomía digital, diseño emocional, e interacción. Se seleccionaron tres casos de estudio de herramientas de realidad virtual de descarga gratuita disponibles en México para su análisis: Google Cardboard, InMind2 y VR Video World. La recopilación de información de cada plataforma se llevó a cabo a partir de una documentación etnográfica de cuatro herramientas cualitativas: perfiles de usuarios, user journey, test de usabilidad bipolar laddering y cardshorting.
El resultado obtenido es una propuesta de diseño de experiencia de usuario para ambientes de realidad virtual que integra una arquitectura basada en cuatro niveles: estrategia, estructura, esquema y superficie, bajo un enfoque que promueve información relacionada a los hábitos cotidianos de los usuarios, así como la detección de aspectos ergonómicos que pueden ser mejorados desde el área del diseño.
A Systematic Review of the Cognitive Impact of Digital Media Modalities on Reading Comprehension in L2
Authors: Pikhart Marcel , Klimova Blanka , Meunier Fanny , Ibarra Irune , Suñer Muñoz Ferran , Zamborova Katarina , Soulé María Victoria , Bartolomé Rodríguez Rocío , Parmaxi Antigoni 
Published: January 2024

The current affordances of ICT have – in the past decade – dramatically increased the exposure of students to the number of various digital texts they use or are exposed to when acquiring an additional language. The print media has been supplemented or even sometimes substituted by the digital media at all levels of education, including higher education and university curricula. Various research has recently been conducted into the role of digital media in L2 acquisition and this paper attempts to systematically summarize the results of this research, with a specific focus on reading comprehension. This systematic review follows the PRISMA guidelines (Page et al., 2021). The 2010-2021 studies from Scopus and the Web of Science dealing with the topic have been collected and analysed. Only experimental studies in peer-reviewed research journal papers have been included in the search. By applying this protocol review, 15 papers were selected for a synthesis. The results were classified as: (a) effect of media on reading comprehension, (b) pedagogical implications, (c) future research directions. The study concludes with some discussion and implications for researchers and practitioners from two perspectives: basic or fundamental Second Language Acquisition (FSLA) and instructed Second Language acquisition (ISLA).
Geological and Mineralogical Analysis of Phosphorites in the Jebel Dhyr Syncline, Eastern Algerian Atlas
Authors: Boulemia Salim , Hadji Riheb , Bouhlal Salah , Hamed Younes , Besser Houda , Ncibi Kaouther 
Published: January 2024

Abstract
The characterization of phosphorite features within specific North African sedimentary series remains incomplete. Hence, the primary aim of this research is to determine the composition of powder patterns and phosphatic allochem fragments within the Jebel Dhyr syncline, situated in northeastern Algeria. By focusing on this region, the study endeavors to investigate the mineralogical properties and geochemical aspects of Paleocene-Eocene phosphorites in the broader context of North Africa. The methodology employed encompasses geological, petrographic, geochemical, and mineralogical analyses of the rocks. To achieve this objective, we have employed various techniques including thin section analysis, atomic absorption spectrometry, and X-ray diffraction (XRD). The geological section across the Jebel Dhyr area has revealed a succession of horizontally layered rocks. These rocks consist of eight prominent phosphorite layers interspersed with carbonate formations. Additionally, occasional thin layers of flint can be observed within these carbonate layers. XRD analysis of the whole rock established the presence of apatite group minerals such as hydroxylapatite, fluroapatite, francolite, and dahllite. Other minerals identified include carbonates, quartz, zeolites, feldspar, clays, sulphides, and gypsum. XRD recordings on the phosphatic allochem grains (pellets, coprolites, intraclasts, and shark teeth) identified different mineral phases, with coprolites and pellets showing hydroxylapatite and fluorapatite, sometimes associated with dahllite, while granules of different forms revealed hydroxylapatite associated with fluorapatite or francolite. Teeth from the Jebel Dhyr phosphate beam showed the systematic presence of fluorapatite. This study provides valuable information for the comprehensive utilization of phosphorus resources in the Algeria-Tunisia border.