bluuebunny/crossref_metadata_2025 huggingface dataset:
Geometric Linearization for Constraint Hamiltonian Systems
Authors: Paliathanasis Andronikos
Published: August 2024

This study investigates the geometric linearization of constraint Hamiltonian systems using the Jacobi metric and the Eisenhart lift. We establish a connection between linearization and maximally symmetric spacetimes, focusing on the Noether symmetries admitted by the constraint Hamiltonian systems. Specifically, for systems derived from the singular Lagrangian LN,qk,q˙k=12Ngijq˙iq˙j−NV(qk), where N and qi are dependent variables and dimgij=n, the existence of nn+12 Noether symmetries is shown to be equivalent to the linearization of the equations of motion. The application of these results is demonstrated through various examples of special interest. This approach opens new directions in the study of differential equation linearization.
Isolation and Genetic Characterization of Genotype VII Velogenic Pathotype Newcastle Disease Virus from Commercial Chicken Farms in Central Ethiopia, Distinct from the Local Vaccine Strains
Authors: Yadeta Waktole , Amosun Elizabeth , Mohammed Hawa , Woldemedhin Wubet , Sherefa Kedir , Legesse Abinet , Deresse Getaw , Birhanu Kenaw , Abayneh Takele , Getachew Belayneh , Farnós Omar , Kamen Amine A. , Gelaye Esayas
Published: August 2024

Newcastle disease (ND) is caused by virulent strains of avian paramyxovirus type 1, also known as Newcastle disease virus (NDV). Despite vaccination, the frequency of reported outbreaks in Ethiopia has increased. From January to June 2022, an active outbreak investigation was conducted in six commercial chicken farms across areas of central Ethiopia to identify the circulating NDV strains. Thirty pooled tissue specimens were collected from chickens suspected of being infected with NDV. A questionnaire survey of farm owners and veterinarians was also carried out to collect information on the farms and the outbreak status. NDV was isolated using specific-pathogen-free (SPF)-embryonated chicken eggs and detected using haemagglutination and the reverse transcriptase–polymerase chain reaction (RT–PCR). The genotype and virulence of field NDV isolates were determined using phylogenetic analysis of fusion (F) protein gene sequences and the mean death time (MDT) test in SPF-embryonated chicken eggs. The questionnaire results revealed that ND caused morbidity (23.1%), mortality (16.3%), case fatality (70.8%), and significant economic losses. Eleven of thirty tissue specimens tested positive for NDV using haemagglutination and RT–PCR. The MDT testing and sequence analysis revealed the presence of virulent NDV classified as genotype VII of class II velogenic pathotype and distinct from locally used vaccine strains (genotype II). The amino acid sequences of the current virulent NDV fusion protein cleavage site motif revealed 112RRQKR↓F117, unlike the locally used avirulent vaccine strains (112GRQGR↓L117). The epidemiological data, MDT results, cleavage site sequence, and phylogenetic analysis all indicated that the present NDV isolates were virulent. The four NDV sequences were deposited in GenBank with accession numbers F gene (PP726912-15) and M gene (PP726916-19). The genetic difference between avirulent vaccine strains and circulating virulent NDV could explain the low level of protection provided by locally used vaccines. Further studies are needed to better understand the circulating NDV genotypes in different production systems.
Pharmacophore-Assisted Covalent Docking Identifies a Potential Covalent Inhibitor for Drug-Resistant Genotype 3 Variants of Hepatitis C Viral NS3/4A Serine Protease
Authors: Iman Kanzal , Mirza Muhammad Usman , Sadia Fazila , Froeyen Matheus , Trant John F. , Chaudhary Safee Ullah
Published: August 2024

The emergence of drug-resistance-inducing mutations in Hepatitis C virus (HCV) coupled with genotypic heterogeneity has made targeting NS3/4A serine protease difficult. In this work, we investigated the mutagenic variations in the binding pocket of Genotype 3 (G3) HCV NS3/4A and evaluated ligands for efficacious inhibition. We report mutations at 14 positions within the ligand-binding residues of HCV NS3/4A, including H57R and S139P within the catalytic triad. We then modelled each mutational variant for pharmacophore-based virtual screening (PBVS) followed by covalent docking towards identifying a potential covalent inhibitor, i.e., cpd-217. The binding stability of cpd-217 was then supported by molecular dynamic simulation followed by MM/GBSA binding free energy calculation. The free energy decomposition analysis indicated that the resistant mutants alter the HCV NS3/4A–ligand interaction, resulting in unbalanced energy distribution within the binding site, leading to drug resistance. Cpd-217 was identified as interacting with all NS3/4A G3 variants with significant covalent docking scores. In conclusion, cpd-217 emerges as a potential inhibitor of HCV NS3/4A G3 variants that warrants further in vitro and in vivo studies. This study provides a theoretical foundation for drug design and development targeting HCV G3 NS3/4A.
vHDvDB 2.0: Database and Group Comparison Server for Hepatitis Delta Virus
Authors: Lee Chi-Ching , Lau Yiu Chung , Liang You-Kai , Hsian Yun-Hsuan , Lin Chun-Hsiang , Wu Hsin-Ying , Tan Deborah Jing Yi , Yeh Yuan-Ming , Chao Mei
Published: August 2024

The hepatitis delta virus (HDV) is a unique pathogen with significant global health implications, affecting individuals who are coinfected with the hepatitis B virus (HBV). HDV infection has profound clinical consequences, manifesting either as coinfection with HBV, resulting in acute hepatitis and potential liver failure, or as superinfection in chronic HBV cases, substantially increasing the risk of cirrhosis and hepatocellular carcinoma. Given the complex dynamics of HDV infection and the urgent need for advanced research tools, this article introduces vHDvDB 2.0, a comprehensive HDV full-length sequence database. This innovative platform integrates data preprocessing, secondary structure prediction, and epidemiological research tools. The primary goal of vHDvDB 2.0 is to consolidate HDV sequence data into a user-friendly repository, thereby facilitating access for researchers and enhancing the broader scientific understanding of HDV. The significance of this database lies in its potential to streamline HDV research by providing a centralized resource for analyzing viral sequences and exploring genotype-specific characteristics. It will also enable more in-depth research within the HDV sequence domains.
Alfalfa Mosaic Virus and White Clover Mosaic Virus Combined Infection Leads to Chloroplast Destruction and Alterations in Photosynthetic Characteristics of Nicotiana benthamiana
Authors: Chen Yinge , Liang Qiaolan , Wei Liexin , Zhou Xin
Published: August 2024

Alfalfa mosaic virus (AMV) is one of the most widely distributed viruses; it often exhibits combined infection with white clover mosaic virus (WCMV). Even so, little is known about the effects of co-infection with AMV and WCMV on plants. To determine whether there is a synergistic effect of AMV and WCMV co-infection, virus co-infection was studied by electron microscopy, the double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA), and real-time fluorescence quantitative PCR (RT-qPCR) of AMV and WCMV co-infection in Nicotiana benthamiana. Meanwhile, measurements were carried out on the photosynthetic pigments, photosynthetic gas exchange parameters, and chlorophyll fluorescence parameters. The results showed that the most severe disease development was induced by AMV and WCMV co-infection, and the disease grade was scale 7. N. benthamiana leaves induced mottled yellow-green alternating patterns, leaf wrinkling, and chlorosis, and chloroplasts were observed to be on the verge of disintegration. The relative accumulation of AMV CP and WCMV CP was significantly increased by 15.44-fold and 10.04-fold upon co-infection compared to that with AMV and WCMV single infection at 21 dpi. In addition, chlorophyll a, chlorophyll b, total chlorophyll, the net photosynthetic rate, the water use efficiency, the apparent electron transport rate, the PSII maximum photochemical efficiency, the actual photochemical quantum yield, and photochemical quenching were significantly reduced in leaves co-infected with AMV and WCMV compared to AMV- or WCMV-infected leaves and CK. On the contrary, the carotenoid content, transpiration rate, stomatal conductance, intercellular CO2 concentration, minimal fluorescence value, and non-photochemical quenching were significantly increased. These findings suggest that there was a synergistic effect between AMV and WCMV, and AMV and WCMV co-infection severely impacted the normal function of photosynthesis in N. benthamiana.
Effect of Dietary Composite Probiotic Supplementation on the Microbiota of Different Oral Sites in Cats
Authors: Zhang Mingrui , Cui Yingyue , Mei Xiaoying , Li Longxian , Wang Haotian , Li Yingying , Wu Yi
Published: August 2024

Probiotics demonstrated effectiveness in modulating oral microbiota and improving oral health in humans and rodents. However, its effects and applications on the oral microbiota of cats remain underexplored. Twelve healthy cats were randomly assigned to a control group (CON) and a composite probiotic group (CPG) for a 42-day trial. The CPG diet included additional supplementation of Bifidobacterium animalis subsp. lactis HN019, Lactobacillus acidophilus NCFM, and Lactobacillus casei LC-11, each at approximately 1 × 1010 CFU/kg. On days 0 and 42, microbial samples were collected from the gingiva, tooth surfaces, and tongue of all cats for 16S rRNA gene sequencing. Bacteroidetes, Firmicutes, and Proteobacteria were the dominant phyla across all oral sites. The CPG treatment enriched seven genera, such as Moraxella, Actinomyces, and Frederiksenia in the gingiva. Meanwhile, Bergeyella and Streptococcus were enriched on the tooth surfaces, while Bergeyella, Flavobacterium, and Luteimonas were enriched on the tongue. Furthermore, the composite probiotic effectively suppressed eight genera, such as Bacteroides, Desulfovibrio, and Filifactor in the gingiva of CPG cats, as well as Helcococcus, Lentimicrobium, and Campylobacter on tooth surfaces, and Porphyromonas, Treponema, and Fusibacter on the tongue. These findings suggest that the composite probiotic used in this study modulates the feline oral microbiota by supporting beneficial or commensal bacteria and inhibiting oral pathogens, demonstrating potential to improve oral health in cats.
Implications of Water Quality Index and Multivariate Statistics for Improved Environmental Regulation in the Irtysh River Basin (Kazakhstan)
Authors: Zhalmagambetova Ultuar , Assanov Daulet , Neftissov Alexandr , Biloshchytskyi Andrii , Radelyuk Ivan
Published: August 2024

The selection of sites for permanent environmental monitoring of natural water bodies should rely on corresponding source apportionment studies. Tools like the water quality index (WQI) assessment may support this objective. This study aims to analyze a decade-long dataset of measurements of 26 chemical components at 26 observation points within the Irtysh River Basin, aiming to identify priority zones for stricter environmental regulations. It was achieved through the WQI tool integrated with geoinformation systems (GISs) and multivariate statistical techniques. The findings highlighted that both upstream sections of tributaries (Oba and Bukhtarma rivers) and the mainstream of the basin are generally in good condition, with slight fluctuations observed during flooding periods. Areas in the basin experiencing significant impacts from mining and domestic wastewater treatment activities were identified. The rivers Glubochanka (GL) and Krasnoyarka (KR) consistently experienced marginal water quality throughout the observation period. Various contaminant sources were found to influence water quality. The impact of domestic wastewater treatment facilities was represented by twofold elevated concentrations of chemical oxygen demand, reaching 22.6 and 27.1 mg/L for the KR and GL rivers, respectively. Natural factors were indicated by consistent slight exceedings of recommended calcium levels at the KR and GL rivers. These exceedances were most pronounced during the cold seasons, with an average value equal to 96 mg/L. Mining operations introduced extremal concentrations of trace elements like copper, reaching 0.046–0.051 mg/L, which is higher than the threshold by 12–13 times; zinc, which peaked at 1.57–2.96 mg/L, exceeding the set limit by almost 50–100 times; and cadmium, peaking at levels surpassing 1000 times the safe limit, reaching 0.8 mg/L. The adverse impact of mining activities was evident in the Tikhaya, Ulba, and Breksa rivers, showing similar trends in trace element concentrations. Seasonal effects were also investigated. Ice cover formation during cold seasons led to oxygen depletion and the exclusion of pollutants into the stream when ice melted, worsening water quality. Conversely, flooding events led to contaminant dilution, partially improving the WQI during flood seasons. Principal component analysis and hierarchical cluster analysis indicated that local natural processes, mining activities, and domestic wastewater discharge were the predominant influences on water quality within the study area. These findings can serve as a basis for enhanced environmental regulation in light of updated ecological legislation in Kazakhstan, advocating for the establishment of a comprehensive monitoring network and the reinforcement of requirements governing contaminating activities.
A Review of Drip Irrigation’s Effect on Water, Carbon Fluxes, and Crop Growth in Farmland
Authors: Guo Hui , Li Sien
Published: August 2024

The substantial depletion of freshwater reserves in many pivotal agricultural regions, attributable to the dual pressures of global climate change and the excessive extraction of water resources, has sparked considerable apprehension regarding the sustainability of future food and water security. Drip irrigation, as an efficient and precise irrigation method, reduces water loss caused by deep percolation, soil evaporation, and runoff by controlling the irrigation dosage and frequency, thus improving the efficiency of water resource utilization. Studies have shown that compared with traditional irrigation methods, drip irrigation can significantly decrease water consumption, optimize the water–energy relationship by reducing soil evaporation, increase the leaf area index, and promote crop growth, thereby enhancing plant transpiration. Although more wet and dry soil cycles from drip irrigation may increase soil CO2 emissions, it also enhances crop photosynthesis and improves crop net ecosystem productivity (NEP) by creating more favorable soil moisture conditions, indicating greater carbon sequestration potential. The advantages of drip irrigation, such as a short irrigation cycle, moderate soil moisture, and obvious dry and wet interfaces, can improve a crop’s leaf area index and biomass accumulation, improve root dynamics, promote the distribution of photosynthetic products to the aboveground parts, and thus enhance crop yields. This study highlights the potential for the application of drip irrigation in arid regions where resource optimization is sought, providing strong technical support for the achievement of sustainable agricultural development. Future research needs to consider specific agricultural practices, soil types, and environmental conditions to further optimize the implementation and effectiveness of drip irrigation.
Integrated Urban Transport and Land-Use Policies in Reducing CO2 Emissions and Energy Consumption: Case Study of a Medium-Sized City in Thailand
Authors: Chindaprasirt Prinya , Klungboonkrong Pongrid , Jaensirisak Sittha , Faiboun Natthapoj , Long Sina , Tippichai Atit , Taylor Michael A. P.
Published: August 2024

In developing cities, transport activities have become one of the primary sources of CO2 emissions and energy consumption owing to rapid economic growth, urbanization, and motorization. Khon Kaen City, Thailand, was chosen as a representative mid-sized city of a developing country to investigate the potential influences of transit-oriented development (TOD), light rail transit (LRT), and electric vehicle (EV) policy integration scenarios on CO2 emission and energy consumption reductions in 2016, 2026, and 2046. The TOD did not significantly reduce CO2 emissions or energy consumption because it was only applied in one area of the city. The LRT development also had a small effect because of the small proportion of modal shifts to LRT. However, EV utilization offered the greatest potential for reducing both CO2 emissions and energy consumption. In addition, the integrated scenario combining the three policies had a promising effect, diminishing both CO2 emissions and energy consumption, because it gathered the potential merits and benefits of each individual policy.
PENGARUH KUALITAS PRODUK, HARGA, PROMOSI, DAN CITRA MERK TERHADAP KEPUTUSAN PEMBELIAN PRODUK HANDPHONE MEREK APPLE
Authors: Aldino Jacky Royani  , Wiyadi
Published: August 2024

This study aims to analyze the effect of product quality, price, promotion and brand image on purchasing decisions for Apple brand mobile phone products. This study uses a quantitative approach with a survey method. The research sample was 100 respondents using purposive sampling method with the following criteria: (1) Consumers and users of apple brand smarphone, (2) Aged 18-35, (3) People residing in Solo Raya. The data analysis used is instrument test, classical assumption test, multiple linear regression test, hypothesis test, and determination coefficient test. The results showed that product quality, price, promotion, and brand image partially had a significant positive effect on purchasing decisions.
Reconstruction of buildings of the first mass series according to green construction standards
Authors: Korniyenko S. V.
Published: August 2024

The relevance of the research topic is due to the need to introduce systemic solutions into practice to create an environmentally sustainable and energy efficient urban environment. Over the past decades, there has been an urgent need to reconstruct the housing stock according to architectural, urban planning and construction requirements. Based on the results of the author’s scientific research, the fundamental possibility of reconstruction of 5-storey brick buildings of the first mass series according to green construction standards is shown. The results obtained convincingly indicate that the reconstruction of buildings of the first mass series according to the green standard GOST 70346—2022 allows improving almost all green categories. The quality of the architecture and layout of the site, energy efficiency and quality of the atmosphere, and the level of innovation in sustainable development are especially noticeably increasing. Before the reconstruction, the buildings of the first mass series do not meet the requirements of green construction. After the reconstruction of these buildings, a rating of “good” was obtained. Comparison of results obtained according to independent green standards GOST 70346—2022 and STO NOSTROY 2.35.4—2011 shows their consistency. Thus, the reconstruction of buildings of the first mass series according to green construction standards makes it possible to create a fundamentally new, environmentally sustainable, energy-efficient architecture in order to preserve and improve the quality of the environment for future generations.
Analisis Faktor-Faktor yang Memengaruhi Penggunaan IUD Pasca Plasenta
Authors: Trisna Anesa Rahmawati  , Sastrawansastrawan  , KarjonoKarjono
Published: August 2024

High maternal mortality rate and infant mortality rate in Indonesia can be suppressed by increased coverage of MKJP methods. The aim of the research was to analyze the factors that influence the use of post-placental contraceptives with IUD methods in Praya RSUD. Research design used analytical observation with case control study. The results of the research obtained the level of knowledge of the WUS and the promotion or KIE activities given by the health personnel are significantly related to the use of post-placental IUDs in RSUD Praya with a P-value of 0,000. However, the health care competence factor is not related to the use of post-placental IUDs in Praya RSUD with a P-value of 0.715. Conclusion The level of knowledge and promotional activities/KIE by health care personnel has been linked to the use of post placental IUD in RSUD Praya. Whereas health care competence has nothing to do with it.
Persepsi Orang Tua dan Pengasuh terhadap Pemberian Imunisasi Rutin pada Balita Pasca Pandemi Covid-19
Authors: Kusumaningtyas Dian , Hanifarizani Rahma Dian
Published: August 2024

Immunization is an effective strategy of the government to reduce morbidity and mortality from Preventable Diseases by Immunization (PD3I). During the Covid-19 pandemic, this situation had a significant impact on the health sector, reducing immunization coverage rates. Currently, Indonesia is in the post-Covid-19 pandemic phase characterized by positive trends in pandemic control. This study aims to understand the perceptions of parents or caregivers regarding the provision of routine immunization to children in the post-Covid-19 pandemic era. The research method used a cross-sectional design with sampling using the quota sampling method, with a total of 100 respondents. Data were collected through a questionnaire adopting the health belief model theory to parents or caregivers who brought their children to the Posyandu for immunization. The results showed that perceptions of vulnerability (p value = 0,071), seriousness (p value = 0,121), and cues to action (p value = 0,731) had an insignificant effect on immunization for toddlers, while perceptions of benefits (p value = 0,008), barriers (p value = 0,000), and self-efficacy (p value = 0,000) had a significant effect on immunization for toddlers in the post-Covid-19 pandemic era (p value < 0.05).    The components of the health belief model that form the perceptions of parents or caregivers towards immunization are interconnected, although not all are statistically significant. Therefore, perceptions of vulnerability, seriousness, and cues to action need to be improved to form a good perception of immunization after the Covid-19 pandemic
Ecos poéticos de la vacuidad
Authors: Alvarez Daniela Elisa
Published: August 2024

El presente artículo trabaja la forma poética del haiku tal como aparece en la obra filosófica de Keiji Nishitani. La metodología de análisis se enmarca en la ecocrítica materialista, arte-ciencia que posibilita leer los haikus evitando dualismos y permitiéndonos pensar otros presentes posibles. A partir del estudio de las distintas partes de un haiku se llega a la presencia de la naturaleza que somos y a la ciclicidad del tiempo; a la continuidad rítmica, como movimiento relampagueante que revela-oculta la eternidad en lo ordinario; y a un poeta sin yo que no se proyecta en las cosas para dejar que éstas aparezcan en su mismidad. Cada haiku se presenta, así, como un ecopoema que hace resonar el eco de la vacuidad y que da lugar a una ekhopoética que es también una ekhopolítica, en tanto que se da una transformación de las formas de subjetivación y los modos de sociabilidad.
Antropología de la conciencia
Authors: Viegas Diego Rodolfo
Published: August 2024

Se desarrolla el recorrido propio del autor para insertar en el medio académico de Argentina la denominada antropología de la conciencia o antropología transpersonal, de la cual se brinda una definición tanto de su incumbencia como de su metodología: la observación involucrante. Se postula a los Estados Ampliados de Conciencia como forma de conocimiento, junto al mito, el rito, la magia y el pensamiento empírico-lógico-técnico y se sintetiza los ejes principales de su último libro Transpersonalismo y Decolonialidad (2021)
Introducción al Dossier
Authors: González Alejandra Adela , Cangi Adrián , Aramburu Hugo
Published: August 2024

¿Produce conocimiento el arte? ¿La ciencia también tiene su poética? ¿La filosofía es un género literario? Este es el debate que abrimos en este espacio, enmarcado en las distintas ediciones del Congreso Epistemologías del Sur, entre 2017 y 2022, pensado en forma conjunta entre el Centro de Investigaciones en Estéticas y Políticas Contemporáneas Latinoamericanas (CIEP) y la Maestría en Estéticas Contemporáneas Latinoamericanas (MECL), ambos espacios de experimentación e investigación pertenecientes al Departamento de Cultura Arte y Comunicación, y entramados con el Programa Transversal DERED-Museos UNDAV de la Secretaría de Investigación y Vinculación Tecnológica e Institucional, con el objetivo de compartir y poner en diálogo los procesos de producción de conocimiento, los modos de formación de obras, las maneras de convivir experiencias y de indagar en los procedimientos de composición sensible, que afectan a los lenguajes de las filosofías, las ciencias y las artes.
40 años
Authors: Busso Néstor
Published: August 2024

La “democratización de la comunicación” para la participación de todas y todos en el debate social sigue siendo un desafío pendiente en estos 40 años de democracia. Los últimos años, con grandes avances tecnológicos y la llamada “globalización” que vivimos -disfrutamos y sufrimos- se han caracterizado por un fuerte impacto de la información y la comunicación en la vida de las personas y de los pueblos. Ni el desarrollo tecnológico ni el “mercado” han permitido una oferta, aunque abundante, lo suficientemente diversa de bienes culturales y medios de comunicación. Por el contrario, se observa una tendencia creciente a los monopolios que han reducido la oferta comunicacional, violando o amenazando la diversidad cultural y los derechos de las mayorías silenciadas. Inclusive las llamadas “Redes Sociales” son controladas por los algoritmos de unas pocas grandes corporaciones.
afectación a los desca de las mujeres y la criminalización por delitos de drogas
Authors: Santinelli Regina Soledad
Published: August 2024

El presente trabajo tiene como objetivo analizar cómo se relaciona la afectación a los Derechos Económicos, Sociales, Culturales y Ambientales de las mujeres en Argentina y su criminalización por delitos de drogas. A su vez, invita a realizar una lectura crítica sobre el rol del Estado, en sus tres poderes, en la vida de estas mujeres y cuales son las falencias. En ese sentido, se trabajan posibles soluciones desde la dogmática penal, que permitan reducir el nivel de criminalización, a partir del análisis de una sentencia judicial de la Cámara Federal de Casación Penal.
Escuela de Criminología Crítica de Barcelona y las principales líneas de investigación para una perspectiva de acceso a la justicia.
Authors: Guthmann Yanina
Published: August 2024

El artículo presenta una investigación realizada entre 2019 y 2022 sobre el proceso de institucionalización de la Escuela de Criminología Crítica de Barcelona desde los años 80 hasta la actualidad. El estudio muestra las decisiones epistemológicas de la Escuela como un ejemplo paradigmático de conocimiento del derecho, con consciencia de los contextos, incluyendo una dimensión afectiva, sensible y humana en temáticas diversas que incluyen dimensiones del acceso a los Derechos Sociales. La Escuela propone una investigación con compromiso personal, como posibilidad de puente entre lo académico y las políticas públicas. Cada investigador/a tuvo la libertad de abrir también sus propias preguntas. Este artículo desarrollará algunos de los ejes de investigación de la Escuela y cómo su abordaje permite cuestionar la unidireccionalidad del concepto de acceso a la justicia ligado a la temática puramente procesal que domina en la mayoría de las formaciones en derecho, abriendo a una dimensión territorial.
CONCENTRATION OF LUNAR PLAGIOCLASE FOR SOLAR CELLS FABRICATION. AN ISRU CONCEPTUAL ARCHITECTURE
Authors: Jamanca-Lino Gustavo
Published: August 2024

Solar panels are required on the Moon to provide power for human activities, especially mining and civil operations. To provide enough power and maintain human settlements working, a technical solution known as the Tall Lunar Tower (TLT) claims to be able to capture sunlight 93% of the time through solar panel structures and provide 50 kW per tower. A typical photovoltaic panel is made of 76% glass, 10% polymer, 8% aluminum, 5% silicon, and 1% other metals. Delivering these materials from Earth is expensive and risky. Fortunately, lunar regolith contains large amounts of silicon and aluminum oxides and silicates, thus, it would be feasible to use the resources in situ for metal production, hence, we just need to transport polymers, wire, and minor components from Earth. This article presents an ISRU (in-situ resource utilization) architecture to provide plagioclase concentrate, the economic lunar ore for aluminum and silicon extraction. The document details engineering aspects and technological solutions for lunar mining, including excavation, transport, and beneficiation operations; based on a hypothetical construction and deployment of TLT at the South Pole. Processing techniques such as screening and magnetic separation are discussed to evaluate their advantages and drawbacks to obtain an expected plagioclase concentration of 70% grade with 18% recovery. Finally, an outline of recommendations for industrial manufacture is discussed, considering the sequential lunar metals extraction and the quality required.
OVERCOMING OBSTACLES: HIGHER EDUCATION INSTITUTIONS AND THE SDGS IN THE EU – A CLUSTER ANALYSIS
Authors: Albanese Marina , Busato Francesco , Cisco Gianluigi , Di Giorno Saverio , Grasso Concetta
Published: August 2024

The aim of this study is to classify Higher Education Institutions (HEIs) in the European Union (EU) based on the financial and knowledge barriers they face in im- plementing sustainable practices. The data was collected from European universities through the European Deans Council for Sustainable Development (DECODE) sustain- ability project. Hierarchical cluster analysis was used to group countries based on their sustainability barriers, and each cluster was analyzed based on the socio-economic struc- ture of the countries and the management organization of the universities. The findings suggest that countries with low scores on both the knowledge and financial side exhibit similarities and those facing higher financial barriers also tend to experience lower levels of knowledge barriers. The study provides valuable insights into the challenges and needs of HEIs in each country regarding Sustainable Development Goals (SDGs). This research can guide policymakers and universities in developing effective strategies to overcome financial and knowledge barriers and promote sustainability practices in HEIs.
Ações de extensão
Authors: Lubich Chiara , Olentino Daniel , Sampaio André , Siqueira-Souza Flávia
Published: August 2024

A pesca esportiva é uma atividade que tem como objetivo a captura de peixe por diversão. No entanto, o peixe é exposto ao estresse da captura, e pode sofrer lesões físicas, devido ao manuseio incorreto, sendo necessário ações que contribuam para minimizar os danos ocasionados na manipulação. Diante dessa realidade, um projeto de extensão para um trecho da bacia do Rio Negro, intitulado “Apoio técnico aos guias de pesca esportiva do médio Rio Negro, Barcelos, Amazonas” foi proposto, uma vez que a região recebe um número elevado de turistas, anualmente, envolvidos na prática da pesca. Esse projeto foi aprovado em edital de extensão da Universidade Federal do Amazonas e sua realização teve a importante missão de disseminar e popularizar o conhecimento da atividade de pesca esportiva e das espécies alvo na área de estudo. Os guias de pesca, foram os atores que tiveram maior participação na atividade (96,5%), fato este interpretado como positivo, uma vez que possuem contato direto com o peixe capturado esportivamente, e normalmente fazem a remoção do anzol desses indivíduos. Logo, o compartilhamento de experiência entre a equipe do projeto e os guias de pesca revelaram-se necessárias para o entendimento sobre a forma correta de manuseio dos peixes capturados, e a condição de sobrevivência desses indivíduos para a temporada seguinte. Esses benefícios seriam incorporados no dia a dia durante as atividades de pesca dos guias, além de oportunizar maior expectativa de qualidade ao meio ambiente.
Klasifikasi Gizi Lansia Menggunakan Metode Naïve Bayes Classifier
Authors: Kartarina Kartarina , Hatina Adelia Azzahrah , Rismayati Ria , Rahmiati Baiq Fitria , Fatimatuzzahra Fatimatuzzahra , Husaini Rahayun Amrullah
Published: August 2024

Elderly people are a group that is vulnerable to experiencing various problems in terms of nutrition and health caused by changes in eating patterns. Nutritional status affects the independence of an elderly person, where good nutritional status means less dependence on other people and vice versa. It is necessary to treat malnutrition or malnutrition as early as possible, one of which is by having an elderly posyandu. Posyandu for the elderly as a community service provides services and assistance in special health for the elderly, by regularly recording, controlling and reviewing the medical records of the elderly in a document. The data processing method in this research uses the Naïve Bayes method, where the data used comes from the medical records of the elderly and then used as a reference as to whether the elderly have good nutrition or are malnourished and require further action. Medical record documents play an important role in posyandu services for the elderly, so that medical record documents should be digitally based and systematic in recommending the nutritional status of the elderly. The Naïve Bayes algorithm is an algorithm that can help in classifying data in diagnosis using criteria for the condition of elderly patients. Naïve Bayes also has precise accuracy when implemented in applications that have databases with large data and makes it easier for users to interpret the results. This is proven by this research which produces an accuracy value of 91% with the data used as a sample of 110 elderly patients. The system design aims to help users as posyandu cadres in knowing whether the condition of the elderly is good, whether the elderly are at risk of malnutrition and provide treatment that is appropriate to the condition of elderly patients as well as assisting the Posbindu PTM in transforming documents into computerized ones.
Sistem Informasi Persediaan Barang dengan Metode Perpetual pada Toko Mebel Sidarta Berbasis Web
Authors: Saputra Rizqi , Sumarlinda Sri , Wijiyanto Wijiyanto
Published: August 2024

Inventory of goods is an important component in company operations, especially for companies that sell finished goods such as furniture and household electronics. The aim of this research project is to create a goods management website using the Perpetual method at the Sidarta Furniture Store. Previously, this shop used manual recording through physical bookkeeping which was considered inefficient, prone to errors, and could hinder sales. To optimize inventory management, an in-tegrated system is needed. This system development uses the waterfall method, which consists of five stages, namely needs analysis, design, implementation, testing and maintenance. During the requirements analysis step, functional and non-functional system requirements are defined. System design involves developing use case diagrams, database design, and user interface design. The system is implemented using PHP as a programming language, CodeIgniter as a framework, and MySQL for database management. The black box testing method is used to carry out the system testing process, which ensures that all functionality operates according to predetermined speci-fications. The results of the tests carried out show that all system functionality functions in ac-cordance with the designed specifications. System maintenance, which is the final stage of the development cycle, is carried out periodically for the long-term sustainability of system opera-tions. This developed system allows the Sidarta Furniture Store to manage inventory data more efficiently and effectively by utilizing the perpetual method. This system is equipped with various features, including an inventory data management interface, supplier data management interface, purchase transaction recording interface, sales transaction recording interface, and the ability to produce comprehensive inventory recapitulation reports. Implementation of this system facili-tates the process of managing and updating inventory data more efficiently and accurately.
ALGORITMA PRINCIPAL COMPONENT ANALYSIS UNTUK MENINGKATKAN PERFORMA FUZZY C-MEANS PADA KLASTERISASI DATASET BERDIMENSI TINGGI
Authors: Riyadi Agung , Fauziah
Published: August 2024

High-dimensional data is very difficult to group, because the data growth is exponential in terms of data format and the number of values for each dimension is impossible to calculate. To increase the efficiency and accuracy of processing high-dimensional data, before testing, data cleaning and data reduction processes were carried out using the Principal Component Analysis (PCA) method. There are challenges in comparing the quality of clusters at different membership values resulting in different final clusters, this is due to the presence of noise and outliers in the processed data. Therefore, the PCA method can be used to reduce data sets from high-dimensional data to low-dimensional data and eliminate noise and outliers. The Fuzzy C-Means (FCM) method with different initialization is used to group data into clusters based on similar data, so that related data is placed in the same cluster. Based on this process, a comparison of the results of the method without PCA and with PCA was obtained and the results obtained from the implementation of PCA+FCM with the initialization of a multi-variate Gaussian distribution were higher with an accuracy level of 87.07.
IOT-BASED SOLAR TRACKER SYSTEM UTILIZING THINGER.IO FOR WEB MONITORING
Authors: Yulianto Naufal , Hakim Nurul Fahmi Arief , Qibtiya Mariya Al , Azhima Silmi Ath Thahirah Al
Published: August 2024

One of the factors to consider when producing electrical energy is the ability to produce an adequate amount of energy at a reasonable cost without causing any adverse effects on the environment. The objective of this research was to create a system that ensures that solar panels are always oriented to face the sun, thereby achieving the highest possible level of light intensity. The energy output efficiency of solar panels is considerably improved, resulting in cost savings and a reduced environmental impact, as a result of the increased light intensity received through the use of solar trackers. The solar tracking system was tested by measuring voltage, current, and power with a specially designed instrument. The results indicated that the use of a solar tracker resulted in a 9.87% increase in voltage, a 22.85% increase in current, and a 27.54% increase in power when compared to a static configuration. The voltage measurement error ranged from 0% to 1.4%, while the current measurement error ranged from 0% to 18%. Furthermore, the MPU-6050 sensor exhibited an average tilt angle error of 1.6%.
Spatial And Temporal Analysis Of Sea Surface Temperature Variability And Chlorophyll-A Over Two Decades In North Sulawesi Waters
Authors: Buana Muhammad Candra , Patty Wilhelmina , Mantiri Rose O. S. E. , Budiman Johnny , Rimper Joice R.T.S.L. , Rangan Jety K. , Sumilat Deiske Adeliene
Published: August 2024

Sulawesi waters are directly affected by the dynamics that occur in the Pacific Ocean. The ENSO phenomenon that occurs in the Pacific Ocean can also be felt in the waters of the Sulawesi Sea. The dynamics of oceanographic parameters can cause climate change. The extreme impact of climate change is mainly the occurrence of rising temperatures and seasonal shifts. The purpose of this study is to analyze the variability of spatial and temporal anomalous distribution of sea surface temperature and chlorophyll-a. This study used monthly AQUA Modis image data, conducted by analyzing the spatial and temporal distribution of sea surface temperatures during the two decades of the period 2003 - 2022. This analysis is based on abnormal values obtained from subtracting parameter values from historical values (the average value of all data). The results of spatial variability analysis of sea surface temperature and chlorophyll –show anomalous variations occur in the western and transitional season periods I, while in the eastern season and transition II positive anomalous values dominate the eastern waters negative anomalies dominate the western waters opposite to chlorophyll – a. This study showed that there was an increase in sea surface temperature slope by 0.000840C / year while in chlorophyll - a there was a decrease in slope by 0.00072mg / m3 / year.
Keywords: Spatial, Temporal, SPL, Chlorophyll – a, Climate Change.
Abstrak
Perairan Sulawesi mendapatkan pengaruh secara langsung dari dinamika yang terjadi di Samudera Pasifik. Fenomena ENSO yang terjadi di Samudera Pasifik juga dapat dirasakan dampaknya di perairan Laut Sulawesi. Dinamika parameter oseanografi dapat menyebabkan terjadinya perubahan iklim. Dampak ekstrem dari perubahan iklim terutama adalah terjadinya kenaikan temperatur serta pergeseran musim. Tujuan penelitian ini Menganalisis Variabilitas distribusi anomali spasial dan temporal dari suhu permukaan laut dan klorofil – a, Penelitian ini menggunakan data citra AQUA Modis bulanan, dilakukan dengan menganalisis sebaran spasial dan temporal suhu permukaan laut selama dua dekade periode 2003 - 2022. Analisa ini didasarkan pada nilai anomali yang didapat dari pengurangan nilai parameter dengan nilai historis (rerata nilai seluruh data). Hasil analisis variabilitas spasial suhu permukaan laut dan klorofil – a menunjukan variasi anomali terjadi pada periode musim barat dan peralihan I , sedangkan pada musim timur dan peralihan II nilai anomali positif mendominasi perairan sebelah timur anomali negatif mendominasi perairan sebelah barat sebaliknya dengan klorofil – a. Penelitian ini menunjukan bahwa terjadi peningkatan slope suhu permukaan laut sebesar 0,000840C/ tahun sedangkan pada klorofil - a terjadi penurunan slope sebesar 0,00072mg/m3/tahun.
Kata kunci: Spasial, Temporal, SPL, Klorofil – a, Perubahan Iklim.
Circularly polarized plane terahertz waves radiated from a resonant tunneling diode integrated with a collimating metalens and quarter-wave plate
Authors: Suzuki Takehito , Endo Kota , Haruishi Takahito , Tsuruda Kazuisao , Urashima Kouhei , Yamamori Shunji
Published: August 2024

Terahertz flat optics based on metasurfaces can replace massive optical components with optically thin components. However, metasurfaces with unprecedented material properties frequently produce a specified function, and terahertz flat optics has yet to be commonly adopted in terahertz devices that require multiple functions. Here, we present a two-layer component composed of a collimating metalens and a quarter-wave plate that convert linearly polarized terahertz wide-angle radiation waves from a resonant tunneling diode to circularly polarized plane waves. Our findings would be applied to laminate structures with optical vortices, ultrahigh directivity and arbitrary wavefront control in 6 G wireless communications.
Sustainable tourism from the perspective of tourists in Nganjuk Indonesia
Authors: Supheni Indrian , Ivada Elvia , Novianti Grevita Elma , Wiwin Wiwin
Published: August 2024

Purpose: This study aims to analyze tourists' perspectives regarding the sustainability of four tourism destinations, namely Sedudo Waterfall, Roro Kuning, TRAL, and Margo Tresno Cave in Nganjuk East Java, Indonesia. Moreover, this study attempts to reveal tourists' sustainability awareness based on the triplebottom-line concept and which dimensions are considered the most important for tourists.
Research Methodology:  Data were obtained from a survey of visitors (16 years old and over) to the four tourist objects in Nganjuk. Furthermore, this study utilized Principal Component Analysis (PCA) and ANOVA tests to evaluate the differences between types of tourists and their views on sustainability.
Results: The number of types of tourists found in the Nganjuk tourist destination was change, amusement, rupture, interest, and dedication. The ANOVA test results show a different tourist perception of sustainability issues from the five types of tourists in Nganjuk.
Limitations: This study involved only young respondents who did not consider tourists beyond a young age. In addition, this study focused only on one regency in Indonesia.
Contributions: To create a tourism industry that can last and protect the environment, the vital role of tourists cannot be ignored. This research makes a theoretical contribution by expanding the theory to explain aspects that have never been studied before regarding tourists' understanding of the sustainability issue in the tourism sector.
Novelty: This study is one of the first to discuss tourists' perceptions of sustainability issues in the Indonesian context.
PARCERIA FIXA OU PARCERIA OCASIONAL?
Authors: Rios Luis Felipe , Dias João Pedro Souza
Published: August 2024

O texto explora os sentidos de parcerias fixas e casuais na interface com o sexo anal sem preservativos (SASP), importante forma de infecção do HIV entre homens que fazem sexo com homens (HSHs). Analisa 38 entrevistas com HSH residentes na Região Metropolitana do Recife (RMR). Nos inquéritos comportamentais, a noção de parceria fixa pressupõe monogamia e exclusividade sexual e a de ocasional sugere vínculo fortuito, momentâneo. Os resultados mostram que a confiança no parceiro é um importante descritor e justificativa das cenas de SASP, ela emerge em parcerias amorosas (namoro, casamento, união estável), mas também é presente em pessoas com as quais se tem sexo com regularidade, nomeadas como conhecidas, de certo modo colapsando as categorias dos inquéritos comportamentais.
Factors Affecting Construction Project Performance: Bharatpur Metro Case Study
Authors: Bagale Shashi , Bohara Niraj
Published: August 2024

This study is conducted to evaluate the time, cost overrun, time-cost relationship and to identify and evaluate the major factors affecting the performance of construction projects in Bharatpur metropolitan city. The study of 11 recently completed ward office building construction projects, revealed that all of them experienced time overruns, ranging from 28% to 150% beyond the contract time. Additionally, 9 of the 11 projects suffered from cost overruns, ranging from 18.54% to 41.03% over the contract amount. In Bharatpur metropolitan city, there is a positive but moderately predictive relationship between construction time and project cost, with longer construction durations typically associated with higher project costs. A questionnaire survey involving 61 identified factors categorised into 9 groups was conducted, validated through the Content Validity test, Criterion Validity test and Cronbach’s Alpha tests. Analysis using Relative Importance Index (RII) determined that the most significant factors, agreed upon by all stakeholders, included project manager leadership skills, materials price escalation, average delay because of closure and materials shortage, design and drawing changes, subcontractor control, organisation liquidity and delayed payments of Relative Importance Index (RII) ranging from 0.513 to 0.925. The Spearman rank correlation (⍴), there is a significant agreement between the ranking of Client, consultant and contractor