bluuebunny/crossref_metadata_2025 huggingface dataset:
Probabilistic Minimum Night Flow Estimation in Water Distribution Networks and Comparison with the Water Balance Approach: Large-Scale Application to the City Center of Patras in Western Greece
Authors: Serafeim Athanasios V. , Kokosalakis George , Deidda Roberto , Karathanasi Irene , Langousis Andreas
Published: January 2022

Quantification of water losses (WL) in water distribution networks (WDNs) is a crucial task towards the development of proper strategies to reduce them. Currently, WL estimation methods rely on semi-empirical assumptions and different implementation strategies that increase the uncertainty of the obtained estimates. In this work, we compare the effectiveness and robustness of two widely applied WL estimation approaches found in the international literature: (a) the water balance, or top-down, approach introduced by the International Water Association (IWA), and (b) the bottom-up or minimum night flow (MNF) approach, based on a recently proposed probabilistic MNF estimation method. In doing so, we use users’ consumption and flow-pressure data from the 4 largest pressure management areas (PMAs) of the WDN of the city of Patras (the third largest city in Greece), which consist of more than 200 km of pipeline, cover the entire city center of Patras, and serve approximately 58,000 consumers. The obtained results show that: (a) when MNF estimation is done in a rigorous statistical setting from high resolution flow-pressure timeseries, and (b) there is sufficient understanding of the consumption types and patterns during day and night hours, the two approaches effectively converge, allowing for more reliable estimation of the individual WL components. In addition, when high resolution flow-pressure timeseries are available at the inlets of PMAs, the suggested version of the bottom-up approach with probabilistic estimation of MNF should be preferred as less sensitive, while allowing for confidence interval estimation of the individual components of water losses and development of proper strategies to reduce them.
Spatiotemporal Organic Carbon Distribution in the Capo Peloro Lagoon (Sicily, Italy) in Relation to Environmentally Sustainable Approaches
Authors: Sanfilippo Marilena , Albano Marco , Manganaro Antonio , Capillo Gioele , Spanò Nunziacarla , Savoca Serena
Published: January 2022

Transitional water environments represent very ecologically interesting areas, which provide various ecosystem services, both concerning biodiversity protection and sustainable fruition of resources. In this way, the evaluation of total carbon and its components, chlorophyll, and chemical and physical parameters is of fundamental importance to deepen the dynamics of these peculiar natural areas. Commercial interests linked to the biological resources of these areas are often not well exploited in relation to their sustainability, due to lack of knowledge. In this study, we investigated the distribution of total organic carbon, chlorophyll, and other related physical and chemical parameters in the natural Lagoon of Capo Peloro (Eastern Sicily), to deepen the knowledge on the carbon equilibrium of these transitional basins. Collected data showed different trends for all parameters, mainly related to different seasons and water exchanges with sea. The influences of primary production sources and farmed molluscs were not negligible and deserve to be further investigated in the future. The results obtained reveal good margins for the possibility of environmentally sustainable exploitation of natural resources in both basins, but at the same time, there is a need for a more detailed knowledge of anthropogenic impacts on the area.
Effect of Radio-Frequency Treatment on the Changes of Dissolved Organic Matter in Rainwater
Authors: Hazmi Ariadi , Rosadi Maulana Yusup , Desmiarti Reni , Li Fusheng
Published: January 2022

Rainwater is a potential source of drinking water, but has various components of dissolved organic matter (DOM). DOM is a reservoir of potential hazards in drinking water. Therefore, a new method is required to purify rainwater as a drinking water source in terms of DOM aspects. A radio-frequency (RF) treatment system is introduced here to purify source water with a small possibility of contamination. RF is generated by applying a frequency of 1.5 MHz through a glass reactor with a diameter of 2 mm which is wrapped by a 2 mm copper wire. The results demonstrate that UV260 value and dissolved organic carbon (DOC) are reduced during RF treatment. DOC was reduced by a lower amount compared to UV260, suggesting the partial transformation of bio-refractory DOM. A fluorescence excitation-emission matrix showed that humic-like substances in rainwater were reduced faster than protein-like ones, indicating that humic-like substances are susceptible to reduction by RF treatment. The results offer information on the use of RF treatment in a rainwater purification process for the production of drinking water.
Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—São Vicente
Authors: Lousada Sérgio , Gonçalves Leonardo , Atmaca Alper
Published: January 2022

This study aims to examine the flood propensity of the main watercourse of São Vicente drainage basin and, if relevant, to propose two methodologies to alleviate the impacts, i.e., detention basin sizing and riverbed roughness coefficient adjustment. Geomorphological data were obtained from the watershed characterization process and used through the SIG ArcGIS software for the flood propensity assessment and then for the calculation of the expected peak flow rate for a return period of 100 years through the Gumbel Distribution. Subsequently, the drainage capacity of the river mouth was verified using the Manning-Strickler equation, in order to establish whether the river mouth of the watershed has the capacity to drain the entire volume of rainwater in a severe flood event. In summary, it was possible to conclude that São Vicente’s watershed river mouth is not able to completely drain the rain flow for the established return period. Thus, its drainage capacity was guaranteed by modifying the walls and streambed roughness coefficient and by sizing the detention basin using the Dutch and the Simplified Triangular Hydrograph methods.
UASB Performance and Perspectives in Urban Wastewater Treatment at Sub-Mesophilic Operating Temperature
Authors: Cecconet Daniele , Callegari Arianna , Capodaglio Andrea G.
Published: January 2022

UASBs present several advantages compared to conventional wastewater treatment processes, including relatively low construction cost facilities, low excess sludge production, plain operation and maintenance, energy generation in the form of biogas, robustness in terms of COD removal efficiency, pH stability, and recovery time. Although anaerobic treatment is possible at every temperature, colder climates lead to lower process performance and biogas production. These factors can be critical in determining the applicability and sustainability of this technology for the treatment of urban wastewater at low operating temperature. The purpose of this study is the performance evaluation of a pilot-scale (2.75 m3) UASB reactor for treatment of urban wastewater at sub-mesophilic temperature (25 °C), below the optimal range for the process, as related to biogas production and organic matter removal. The results show that, despite lower methane production and COD removal efficiency compared to operation under ideal conditions, a UASB can still achieve satisfactory performance, and although not sufficient to grant effluent discharge requirements, it may be used as a pretreatment step for carbon removal with some degree of energy recovery. Options for UASB pretreatment applications in municipal WWTPs are discussed.
Machine Learning Approach to Predict Quality Parameters for Bacterial Consortium-Treated Hospital Wastewater and Phytotoxicity Assessment on Radish, Cauliflower, Hot Pepper, Rice and Wheat Crops
Authors: Rashid Aneeba , Mirza Safdar A. , Keating Ciara , Ijaz Umer Z. , Ali Sikander , Campos Luiza C.
Published: January 2022

Raw hospital wastewater is a source of excessive heavy metals and pharmaceutical pollutants. In water-stressed countries such as Pakistan, the practice of unsafe reuse by local farmers for crop irrigation is of major concern. In our previous work, we developed a low-cost bacterial consortium wastewater treatment method. Here, in a two-part study, we first aimed to find what physico-chemical parameters were the most important for differentiating consortium-treated and untreated wastewater for its safe reuse. This was achieved using a Kruskal–Wallis test on a suite of physico-chemical measurements to find those parameters which were differentially abundant between consortium-treated and untreated wastewater. The differentially abundant parameters were then input to a Random Forest classifier. The classifier showed that ‘turbidity’ was the most influential parameter for predicting biotreatment. In the second part of our study, we wanted to know if the consortium-treated wastewater was safe for crop irrigation. We therefore carried out a plant growth experiment using a range of popular crop plants in Pakistan (Radish, Cauliflower, Hot pepper, Rice and Wheat), which were grown using irrigation from consortium-treated and untreated hospital wastewater at a range of dilutions (turbidity levels) and performed a phytotoxicity assessment. Our results showed an increasing trend in germination indices and a decreasing one in phytotoxicity indices in plants after irrigation with consortium-treated hospital wastewater (at each dilution/turbidity measure). The comparative study of growth between plants showed the following trend: Cauliflower > Radish > Wheat > Rice > Hot pepper. Cauliflower was the most adaptive plant (PI: −0.28, −0.13, −0.16, −0.06) for the treated hospital wastewater, while hot pepper was susceptible for reuse; hence, we conclude that bacterial consortium-treated hospital wastewater is safe for reuse for the irrigation of cauliflower, radish, wheat and rice. We further conclude that turbidity is the most influential parameter for predicting bio-treatment efficiency prior to water reuse. This method, therefore, could represent a low-cost, low-tech and safe means for farmers to grow crops in water stressed areas.
Geomatic-Based Flood Loss Assessment and Its Application in an Eastern City of China
Authors: Jin Youjie , Zhang Jianyun , Liu Na , Li Chenxi , Wang Guoqing
Published: January 2022

Flash-flood disasters pose a serious threat to lives and property. To meet the increasing demand for refined and rapid assessment on flood loss, this study exploits geomatic technology to integrate multi-source heterogeneous data and put forward the comprehensive risk index (CRI) calculation with the fuzzy comprehensive evaluation (FCE). Based on mathematical correlations between CRIs and actual losses of flood disasters in Weifang City, the direct economic loss rate (DELR) model and the agricultural economic loss rate (AELR) model were developed. The case study shows that the CRI system can accurately reflect the risk level of a flash-flood disaster. Both models are capable of simulating disaster impacts. The results are generally consistent with actual impacts. The quantified economic losses generated from simulation are close to actual losses. The spatial resolution is up to 100 × 100 m. This study provides a loss assessment method with high temporal and spatial resolution, which can quickly assess the loss of rainstorm and flood disasters. The method proposed in this paper, coupled with a case study, provides a reliable reference to loss assessment on flash floods caused disasters and will be helpful to the existing literature.
Multivariate Dam-Site Flood Frequency Analysis of the Three Gorges Reservoir Considering Future Reservoir Regulation and Precipitation
Authors: Xiong Lihua , Jiang Cong , Guo Shenglian , Li Shuai , Li Rongrong , Li Wenbin
Published: January 2022

Under a changing environment, the current hydrological design values derived from historical flood data for the Three Gorges Reservoir (TGR) might be no longer applicable due to the newly-built reservoirs upstream from the TGR and the changes in climatic conditions. In this study, we perform a multivariate dam-site flood frequency analysis for the TGR considering future reservoir regulation and summer precipitation. The Xinanjiang model and Muskingum routing method are used to reconstruct the dam-site flood variables during the operation period of the TGR. Then the distributions of the dam-site flood peak and flood volumes with durations of 3, 7, 15, and 30 days are built by Pearson type III (PIII) distribution with time-varying parameters, which are expressed as functions of both reservoir index and summer precipitation anomaly (SPA). The multivariate joint distribution of the dam-site flood variables is constructed by a 5-D C-vine copula. Finally, by using the criteria of annual average reliability (AAR) associated with the exceedance probabilities of OR, AND and Kendall, we derive the multivariate dam-site design floods for the TGR from the predicted flood distributions during the future operation period of the reservoir. The results indicate that the mean values of all flood variables are positively linked to SPA and negatively linked to RI. In the future, the flood mean values are predicted to present a dramatic decrease due to the regulation of the reservoirs upstream from the TGR. As the result, the design dam-site floods in the future will be smaller than those derived from historical flood distributions. This finding indicates that the TGR would have smaller flood risk in the future.
Ecotoxicological Effects of Silver Nanoparticles (Ag-NPs) on Parturition Time, Survival Rate, Reproductive Success and Blood Parameters of Adult Common Molly (Poecilia sphenops) and Their Larvae
Authors: Vali Sara , Majidiyan Nava , Yalsuyi Ahmad Mohamadi , Vajargah Mohammad Forouhar , Prokić Marko D. , Faggio Caterina
Published: January 2022

Nanoparticles (NPs) can display toxicological effects on aquatic organisms. This study investigates ecotoxicological effects of Ag-NPs on reproductive and blood parameters of adult common molly (Poecilia sphenops) and their larvae. During the LC50 96 h test, female fish were exposed to concentrations of 0, 5, 15, 25, 35, 45 and 60 mg L−1 of Ag-NPs, while larvae were exposed to 0, 3, 5, 10 and 15 mg L−1. Finally, we aim to evaluate the effects of 0, 5, 10 and 15 mg L−1 of Ag-NPs on parturition time, reproductive success and hematological parameters of the mature fish exposed to sub-lethal concentration during a 62-day period. We also evaluated the survival rate of larvae. The results show a positive correlation between mortality rate and Ag-NP concentration. Values for LC50 96 h in adult fish and larvae were 26.85 mg L−1 and 6.22 mg L−1, respectively. A lack of parturition and reproductive success were seen in fish that underwent chronic exposure to Ag-NPs (15 mg L−1). The results show that RBC, WBC and hematocrit were significantly decreased in fish exposed to Ag-NPs. In addition, the serum concentrations of total protein, albumin, cholesterol and triglycerides were significantly increased in fish submitted to Ag-NPs (concentrations of 5–15). In conclusion, submitting a fish to higher concentration than 10 mg L−1 has adverse effects on reproductive system and blood parameters.
Adaptation Strategies for Flooding Risk from Rainfall Events in Southeast Spain: Case Studies from the Bajo Segura, Alicante
Authors: Sánchez-Almodóvar Esther , Olcina-Cantos Jorge , Martí-Talavera Javier
Published: January 2022

The management of runoff during torrential rainfall events is a significant problem in urban areas of southeast Spain. The increase in soil sealing and the occupation of areas prone to flooding have aggravated this problem. Due to this situation, municipal administrations, in collaboration with the concession holder for the supply of water and sewage services, Hidraqua Gestión Integral de Aguas de Levante SA, are committed a more efficient management of non-conventional water resources. An example of this can be found in the municipalities of Rojales, Daya Nueva, and San Fulgencio. These towns are located in the Bajo Segura region of the province of Alicante, where various initiatives have been implemented that break away from the traditional paradigm of rigid infrastructures. These initiatives include green spaces or areas, and sustainable urban drainage systems (SUDS) or nature-based solutions (NBS). This article presents various case studies. Firstly, in the town of Rojales, where several actions are being undertaken to improve the management of wastewater and rainwater and provide a solution to unauthorised dumping, as well as encouraging the use of reclaimed water with the creation of a recreational green area, El Recorral Park. Secondly, in the case of Daya Nueva, the Europa Park constitutes a recreational green area, Europa Park, facilitates runoff drainage by SUDS and NBS. Finally, the creation of a floodable pond in the municipality of San Fulgencio encourages the use of wastewater, thus avoiding the discharge of this non-conventional water resource into the sea. In addition, the pond facilitates the appropriate management of runoff water. The working method in this article has been twofold: firstly, bibliographical references have been consulted from other national and international areas; and secondly, the technical projects in the case studies have been analysed in detail. Several field trips have been made to the selected municipalities, accompanied by the technical personnel in charge of the execution of the projects, to examine the measures adopted. The results show that the implementation of these systems contributes to adapting to climate change and creates more resilient urban spaces.
Interplay between Asian Monsoon and Tides Affects the Plume Dispersal of the New Hu-Wei River off the Coast of Midwest Taiwan
Authors: Ho Chia-Ying , Fang Tien-Hsi , Wu Cheng-Han , Lee Hung-Jen
Published: January 2022

In the coupled estuary–shelf system, plumes originating from the New Hu-Wei and Choshui rivers, consisting of many terrestrial materials, could contaminate the water of the Mailiao industrial harbor. To determine the contribution of the two rivers to pollution, the interaction between river-forced, tide-generating, and monsoon-driven water motions in and around the Mailiao industrial zone harbor was examined by performing a series of numerical model experiments. We used a three-dimensional general circulation model to examine the interplay between Asian monsoon-driven, river-forced, and tide-induced water motions, one of which could primarily affect the plume. The model-derived results for different river discharges revealed that almost all of the ammonium entering the harbor had a slope-positive trend, with oscillations in response to flood–ebb tidal cycles. The ammonium increased with time and flux, except for the 10 m3/s flux. Although the river discharge flux exceeded 200 m3/s, the ammonium entering the harbor was the same as that of the 200 m3/s flux; the ammonium concentration did not increase significantly with time after the flux exceeded 200 m3/s. In addition, irrespective of flood or ebb tidal currents being suppressed by strong Asian monsoons, this mechanism avoided contaminating the water quality of the harbor while northeasterly winds prevailed. By contrast, the southwesterly monsoon drove the geostrophic current northward along the coast; concurrently, the coastal sea level increased to form the surface isobar slope up toward the coast, producing a secondary flow to accelerate geostrophic alongshore currents. The northward geostrophic currents compressed the plumes shoreward, forming a relatively narrow-band plume; the coupling model demonstrated that the southwesterly monsoon-driven current pushed plumes favorably along the west pier into the harbor.
Roadmapping the Transition to Water Resource Recovery Facilities: The Two Demonstration Case Studies of Corleone and Marineo (Italy)
Authors: Mannina Giorgio , Badalucco Luigi , Barbara Lorenzo , Cosenza Alida , Di Trapani Daniele , Laudicina Vito Armando , Muscarella Sofia Maria , Presti Dario
Published: January 2022

The current exploitation of freshwater, as well as the significant increase in sewage sludge production from wastewater treatment plants (WWTPs), represent nowadays a critical issue for the implementation of sustainable development consistent with the circular economy concept. There is an urgent need to rethink the concept of WWTPs from the conventional approach consisting in pollutant removal plants to water resource recovery facilities (WRRFs). The aim of this paper is to provide an overview of the demonstration case studies at the Marineo and Corleone WRRFs in Sicily (IT), with the final aim showing the effectiveness of the resources recovery systems, as well as the importance of plant optimization to reduce greenhouse gas (GHG) emissions from WRRFs. This study is part of the H2020 European Project “Achieving wider uptake of water-smart solutions—Wider-Uptake”, which final aim is to demonstrate the water-smart solution feasibility in the wastewater sector. The main project goal is to overcome the existing barriers that hamper the transition to circularity through the implementation of a governance analysis tool. The preliminary actions in the two demonstration cases are first presented, while, subsequently, the water-smart solutions to be implemented are thoroughly described, highlighting their roles in the transition process. The achieved preliminary results underlined the significant potential of WRRF application, a great chance to demonstrate the feasibility of innovative solutions in the wastewater sector to overcome the existing social, administrative and technical barriers.
Nitrite Stress Induces Oxidative Stress and Leads to Muscle Quality Decreased in Wuchang Bream (Megalobrama amblycephala Yih) Juveniles
Authors: Hu Zhenyi , Qi Chenglong , Lin Chenzhi , Tang Rong
Published: January 2022

To determine the effects of nitrite exposure on muscle quality and physiological functions in Wuchang bream (Megalobrama amblycephala), we exposed M. amblycephala juveniles to acute nitrite (0, 1, 5, 10, 20 mg/L), and the muscle and blood samples were measured at 12, 24, 48, and 96 h. The results showed that when exposed to nitrite for 12 h, the concentrations of blood glucose, cortisol, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) in the 20 mg/L experimental group had the maximum value. The activity of lactate dehydrogenase (LDH) increased significantly in a dose-dependently manner and peaked at 96 h in the 20 mg/L group. During 96 h of exposure to nitrite, the total antioxidant capacity (T-AOC) and catalase (CAT) activity in the liver of the 20 mg/L experimental group were significantly higher than those of the control group, while the concentration of muscle glycogen showed a downtrend. At 12 h and 96 h, the hardness of the four experimental groups were significantly higher than that of the control group. Our research shows that acute sodium nitrite exposure will not only cause oxidative stress and decreased muscle quality in M. amblycephala juveniles but also will be accompanied by changes in serum biochemical index, liver antioxidant capacity, muscle physiological characteristics, and muscle physical characteristics. Preliminary speculation may be that acute nitrite exposure may cause M. amblycephala juveniles to choose to reduce muscle quality and activate antioxidant systems.
Evaluation of a Smectite Adsorption-Based Electrostatic System to Decontaminate F− Rich Thermal Waters
Authors: Fanari Fabio , Lodi Matteo Bruno , Getaneh Worash , Fanti Alessandro , Desogus Francesco , Valera Paolo
Published: January 2022

Several studies have shown the presence of fluoride levels much higher than the 1.5 mg/L threshold concentration recommended by WHO in the spring waters and wells of the Ethiopian Rift Valley. Available defluoridation techniques can be costly, present complicated technical aspects, and show limited effectiveness. Therefore, it is necessary to devise innovative, sustainable, and effective solutions. This study proposes an alternative method of intervention to the known techniques for removing fluoride from water, particularly suitable for smaller rural communities. In particular, in this work, the possibility to use electromagnetic fields as a physical method for removing the excess fluoride was investigated. The study was carried out by developing a multiphysics model used for studying and envisaging the design of a device. In this framework, the combination of this approach with the use of highly reactive smectite clay was numerically studied. The results obtained, although preliminary, indicate that the proposed system could significantly impoverish the waters of the Rift Valley from fluoride, with the consequence of obtaining a resource suitable for human consumption, in particular for rural communities. However, further theoretical investigations and experimental phases will be necessary to achieve the desired results.
Adsorption Characteristics and Molecular Simulation of Malachite Green onto Modified Distillers’ Grains
Authors: Li Chengtao , Kong Deyi , Yao Xiaolong , Ma Xiaotao , Wei Chunhui , Wang Hong
Published: January 2022

Adsorbent material was prepared using distillers’ grains (DG), which is a waste product of distilleries. The DG was pre-treated with NaOH and esterification-modified with CS2, which is a commonly used anionic modifier. The structure and morphology of the adsorbent was characterized by FTIR, XRD, EDS, SEM, BET, and zeta potential. The related mechanism of adsorption of malachite green (MG) onto modified distiller’s grains (MDG) was studied by adsorption experiments and molecular simulation techniques. The experimental results showed that CS2 successfully modified the DG fiber, and simultaneously yielded the MDG with a uniform pore distribution. MDG had a considerable adsorption capacity of 367.39 mg/g and a maximum removal rate of 96.51%. After eight adsorption–desorption cycle experiments, the adsorption removal rate of MDG to MG dye remained at 82.6%. The adsorption process could be fitted well by a pseudo-second-order kinetic model (the correlation coefficient R2 > 0.998) and Freundlich isotherm adsorption equation (the correlation coefficient R2 > 0.972). Moreover, the adsorption of MG dye by MDG is a spontaneous, endothermic, and increased entropy process. The results of molecular simulation showed that the mechanism of MG molecules onto MDG was mainly chemical adsorption. The adsorption performance of MG onto MDG was better and more stable than DG. Molecular simulation also provided a theoretical guidance of MDG adsorption–desorption for the research on recycling of DG resources.
A Novel Sub-Harmonic Synchronous Machine Using Three-Layer Winding Topology
Authors: Rafin S M Sajjad Hossain , Ali Qasim , Lipo Thomas A.
Published: January 2022

This paper proposes a novel brushless synchronous machine topology that utilizes stator sub-harmonic magnetomotive force (MMF) for desirable brushless operation. The sub-harmonic MMF component that is used in this novel topology is one fourth of the fundamental MMF component, whereas, in previous practices, it was half. To achieve the brushless operation, the novel machine uses a unique stator winding configuration of two sets of balanced 3-phase winding wound in 3 layers. For the rotor, additional winding is placed to induce the sub-harmonic component to achieve the brushless excitation. Unlike its predecessors, it utilizes maximum allowable space in the stator to house conductors in all of its slots. To implement the topology, 8-pole, 48-slot sub-harmonic brushless synchronous machine model has been designed. A 2-D finite element analysis (FEA) is used to simulate and validate the performance of the novel machine as a motor. The proposed topology shows better average torque than the existing sub-harmonic wound rotor brushless synchronous machine topologies.
Wisdom is Elimination of Hunger
Authors: P Praburam
Published: January 2022

Hunger is more cruel then other tragedies. Saint Ramalingar loudly said to the enlightened world that ‘Seevakarunyam’ is spiritual contribution to elimination of hunger of another soul. He has said happyness and sorrow belong only to the soul, not for the body. So hunger suppresses wisdom of soul. It is not a crime to satisfy the hunger of sinners. Humans have the power to feel the hunger of others. Therefore, the primary task of Vallalaar is to satisfy the hunger of fellow human beings. Also Vallalaar insists on eating meat and donating it to others. Because he considers eating meat to be against spiritual wisdom and spirituality. Diferrences of nation, caste and creed are not important for elimination of hunger of others. It is our duty to quench the hunger of fellow human beings. A mind devoid of debit will cure hunger. Thus wisdom is the realization of oneself by others.
Alejandra Pizarnik, su aporte en la construcción del concepto de mujer en el feminismo interseccional
Authors: Navas Espinosa Rosa Estefanía
Published: January 2022

El presente estudio recopila y describe la construcción del concepto de la mujer desde los aportes literarios de Pizarnik. Asimismo, se articulan escritos de Pizarnik con el enfoque del feminismo interseccional. La metodología aplicada es de tipo descriptivo-cualitativo, con un diseño narrativo. El ensayo tiene como principal objetivo describir desde varios escritos de Pizarnik, tales como poesía, diarios y citas, la construcción del concepto de la mujer, relacionando con el feminismo interseccional. En varios poemas y escritos se vislumbra varias temáticas: la noción de mujeres unidas, la ruptura de los estereotipos de género, la soledad, independencia de una mujer, el apropiarse del cuerpo, la construcción de ser mujer desde una perspectiva “outsider”, las barreras infranqueables entre los derechos que poseen las mujeres y los hombres, además de la insuficiencia del lenguaje en la descripción de versiones de realidad.
Hipercortisolemia y estrés. Impacto en las funciones cognitivas
Authors: Tobar Soto Leticia Cecilia
Published: January 2022

El presente artículo tiene como propósito dar a conocer los hallazgos de una revisión documental sistemática de estudios publicados entre los años 2013 y 2021. El objetivo de la investigación fue establecer la relación de los efectos y alteraciones que produce el cortisol alto y sostenido en el tiempo sobre las funciones cognitivas. Para lograr este objetivo se revisaron 73 documentos, los cuales fueron sometidos a un análisis formal y de contenido, en una secuencia ordenada, orientada por los objetivos de la investigación, seleccionando 36 investigaciones neurocientíficas. Los documentos encontrados corresponden a fuentes primarias y secundarias, asociadas a las temáticas, cortisol en términos de definición, función y alteración;  hipercortisolemia sostenida, estrés y estructuras cerebrales; identificación de los daños y alteraciones en las estructuras cerebrales, como la amígdala, el hipocampo y corteza prefrontal, así como funciones cognitivas tales como: atención, memoria, cognición social y planificación, consideradas como prerrequisitos para el desarrollo del aprendizaje. El estudio permitió concluir que los niveles altos de cortisol, por periodos prolongados a causa del estrés físico y psicológico, generan un impacto negativo en el organismo, produciendo una condición neurotóxica para las estructuras cerebrales, modificando su volumen y favoreciendo una disfunción neuronal, generando como consecuencia alteración en las funciones cognitivas, tales como: fallo en el sistema arousal, estado de alerta, concentración, así como memoria episódica y espacial, que en su conjunto afectan el procesamiento de información y aprendizaje.
Online Informal Learning of English Activities to Improve Students’ English Communication Skills
Authors: Lutfiana Zahrotul , Kristina Diah , Sumardi Sumardi
Published: January 2022

This study aims to learn about students' experiences developing their speaking skills using Online Informal Learning of English (OILE) activities. The researcher gathered data for this narrative study by interviewing and observing three English education students at a State University in Central Java. The data were then evaluated qualitatively. The results indicated that students learned several aspects of speaking and communicating in English using Youtube video content, including pronunciation, intonation, and expressiveness. Additionally, the students used a variety of social media and chat platforms to engage with their international peers in English. Additionally, students favoured this informal learning mechanism because they recognized the efficacy of these online everyday learning activities in pleasantly achieving meaningful learning goals. Additionally, OILE activities aided students' speaking performance during informal learning activities.
Online Learning Management during the Covid-19 Pandemic in Vocational High School
Authors: Tahalli Ahmad , Prasojo Lantip Diat
Published: January 2022

Research in this area is focused on 1) analyzing school-based use of online learning management, 2) finding patterns, 3) explaining how online learning management strategies work, 4) identifying both supporting and inhibiting factors. This study employs a qualitative case study methodology. Students and teachers were the primary and secondary sources of information for this study. Observation, interviews, and documentation are used in this study to gather data. To summarize: (1) the concept of online learning management can use WhatsApp to convey information and Google Classroom for learning; (2) the pattern used in school management is to use four steps of management functions; (3) the strategy used in online learning management is to assign tasks and responsibilities based on the abilities and skills of teachers involved in the online learning process; and (4) For those who lack an Android phone and an Internet connection, it can be challenging to connect to the network. Some teachers and students have difficulty effectively navigating and utilizing various forms of media. It is expected that the findings of this study will be used as a guide for online learning in vocational high schools during the pandemic.
PAIKEM through Live Music and Gathering to Improve Student Achievement in Doremi Home Music Course Ponorogo
Authors: Muafiah Evi , Damayanti Vivi V. W. , Ariyanti Puji
Published: January 2022

Learning using the active, innovative, creative, effective, and fun participation methods is a learning process by creating an atmosphere in such a way that students actively participate in learning process. The methods facilitated students in building their process of behavior change towards a better direction while accommodating students' thoughts, ideas, creativity to achieve goals or at least achieve basic competencies set by the teacher by creating a pleasant of learning atmosphere. This method also applies to music education. Music education is a determining factor in shaping a child's personality. Doremi Home Music Course is a course and training institution engaged in music training. This research and development showed that using the learning model with life music and gathering can improve student achievement in Doremi Home Music Course. The design of the learning model for live music and gathering with the application of the active, innovative, creative, effective, and fun participation method has a high degree of permanence.
Women Empowerment in Indonesia: Community Learning Activity Center Programs
Authors: Dadi Dadi
Published: January 2022

One of the factors that support the progress of a nation is the participation of women in community development. Educated women are crucial aspects in improving the quality of human resources. The government together with the community, have responsibilities and play an essential role in facilitating educational activities for women. Community Learning Activity Center (PKBM), as an institution established and managed by the society to increase knowledge, skills, expertise and talents, is responsible for preparing community members to be more independent in meeting their needs, especially in the program for marginalized women empowerment. Among the programs, Women's Life Skills Education Program (PKHP) presents as an alternative solution to provide facilities for women to grow. Many researchers documented the activities in this program and published them in Community Service journals or scientific journals. Therefore, the current study would shed light on the efforts they made by implementing a literature study. By analysing using narrative synthesis studies, the findings reported on diverse activities that were created to develop women’s life skills by utilizing the local natural resource potential as well as the methods of delivery and prospected outcomes. This study also provides some practical implications and future recommendations.
Fulfilment of Formal Education for Children with Criminal Sentences: Analysis of Law Number 11 of 2012 concerning the Juvenile Justice System
Authors: Subarsyah Subarsyah
Published: January 2022

Crimes committed by children are currently experiencing a very significant increase. In Indonesia, the settlement of criminal cases against children is included in vulnerable children who need more attention in fulfilling their rights. However, there are still many violations of children's rights during their status as perpetrators of crimes and afterwards. This study aims to analyze the fulfilment of the formal education of criminal children by Law Number 11 of 2012 concerning the Juvenile Justice System. This study uses a qualitative approach with a literature study. The results of the study explain that Indonesia as a country that has ratified the Convention on the Rights of the Child through Presidential Decree Number 36 of 1990 dated August 25, 1990, has further integrated children's rights into national law, namely into Law Number 23 of 2002 concerning Child Protection. Protection of children was created as an effort to educate and build quality and affluent children in education. These forms of protection include providing comfort, security, health, and adequate education. The existence of The Child Special Guidance Institute plays a vital role in fulfilling the educational needs of formal and non-formal children.
The Effect of Principal Managerial Ability and Motivation on Teacher Performance with Job Satisfaction as Moderating Variable
Authors: Sulastri Lilis
Published: January 2022

There must be a high level of focus on principals' quality of human resources in education. This focus must be demonstrated by a commitment and capacity to optimally strengthen managerial abilities and motivate their subordinates, mainly teachers and education professionals, to better their work. Based on this research, the impact of principal managing skills on teacher performance, motivational factors, job satisfaction on teacher performance, and the influence of job satisfaction on principals' managerial skills and teacher performance. Descriptive verification with a quantitative approach—sampling utilizing non-probability sample type—is used in this study. tcount ttable (6.094 1.666), tcount ttable (9.366 1.666) and rcount ttable (0.000). The results of this study indicate that (1) the principal's managerial skills have an impact on teacher performance, (2) there is a significant and also influence between motivation and teacher performance, and (3) there is an influence between Job Satisfaction on Teacher Performance because the rcount ttable (0.000). There is no significant effect of Job Satisfaction interaction moderating the effect of Skills managerial principal to teacher performance, as the results of tcount ttable (0.769 1.666) with a significance value of 0.444 0.05 and tcount ttable (0.161 1.666) with a significance value of 0.872 0.05 show. Systems audit materials require direct skills and in-depth knowledge of the subject matter.
Primary School Teachers’ Perception of Supervision Through the Use Google Form Application During the Covid-19 Pandemic
Authors: Purwati Nining , Hakim Mohammad Viktor Farid
Published: January 2022

This study aimed to investigate the teachers’ perception and supervision experience using the google-form application during the Covid-19 pandemic. The research method used a qualitative approach with a descriptive method. Data were collected by using observation, questionnaires and interviews. There were 10 participants (male 5 and female 5). They were teachers (8 teachers), vice-principal of the curriculum and principal. The process of data analysis is through data reduction, data presentation, drawing conclusions and triangulation. The study results concluded that the google-form provides convenience in examining teachers' teaching and learning files. It was easy for school principals to assess the results of teacher teaching with a longer period before the implementation of online supervision, as an advanced form of using the google-form. The study results also had implications for teachers and school principals' understanding of the use of technology applications to improve teaching and learning or provide higher quality education.
The Impact of Lerntagebuch on Learning Outcome of German Writing Skills Through Freizeit Theme
Authors: Hutubessy Ellychristina D. , Santiah Santiah , Pramesya Nastasha Hera
Published: January 2022

This study aims to determine the effect of Lerntabeguch on learning outcomes of German writing skills using the freizeit theme. The method used in this study is a quantitative method with a research design of Pretest Posttest Control Group Design. The research was conducted at State Senior High School 31 Jakarta. The research sample was taken by a simple random sampling technique. Data were collected through documents and writing tests. Validity tests were using Pearson Product Moment and reliability using Cronbach Alpha. While the data analysis technique used a t-test. The results showed that the t-count Pretest in the experimental class and control class was 1.108 with t-table at a significance level of = 0.05 and degrees of freedom (DK) = 34. While the results of the t-count Posttest in the experimental class and control class were 3,485. So, there is an effect of using Lerntagebuch on learning outcomes of German writing skills for class XII students related to the topic of Free Time Activities (Freizeit).
Urgency and Adaptation of New Literations in Primary School Education in the Digital Era
Authors: Bandarsyah Desvian
Published: January 2022

Teachers have been aware of the urgency of literacy; however, some teachers are still neglected. The main purpose of this paper is to discuss new literacy in the digital era, which includes primary school education. Our primary education is an important actor in preparing Indonesian future generations. The research method used was a literature review to view the diversity of culture and awareness among Indonesian. Data had been collected throughout history recorded in digital, books, and many others. Data were analyzed using comparing the diverse history related to primary education. By comparing data, we make a framework that is used to organize future primary education. The results show that the digital era and literacy are becoming integrated to improve learning and teaching quality. Both teachers and students should be aware a digital literacy should improve the quality of our education. The study's implications will be used to assess how effective literacy education has improved educational quality.
Student Political Participation and the Future of Democracy in Indonesia
Authors: Djumadin Zainul
Published: January 2022

Political participation means we will talk about the activities or activities of people as citizens in political life. Every citizen is required to participate in the process of making and formulating all state political policies. Students are intelligent individuals who are significant assets for a country. Students' political participation will feel more meaningful because they are considered and know that they are also idealistic and have not been contaminated by various destructive ideas. Therefore, this study aims to determine student political participation and the future of democracy in Indonesia. This study uses a qualitative approach with descriptive methods in analyzing research data. Political participation of students in democracy can be seen by their participation in democratic elections as novice voters, with the participation of students in elections will provide political sensitivity and stimulation to students to be more actively involved in politics, with them being more actively involved in politics will be able to develop social character so that they have independence in determining their desires and are not easily influenced by persuasion and invitations from certain parties. In this study, there is also a need for political education for students. It is not easy to swallow false information that specific individuals do not truly create due to the lack of experience and knowledge in the field of politics in Indonesia.
Management Development of Problem-Based Learning
Authors: Haris Ikhfan
Published: January 2022

Problem-based learning has been used in high school classrooms for a long time. Despite all the theory and practical recommendations on the usefulness of problem-based learning, empirical research reveals that it primarily impacts problem-solving. Critical thinking problems and talents, but not necessarily knowledge. Various theoretical techniques, which are addressed in this work, can assist problem-based learning. After that, a detailed assessment of the empirical literature on problem-based learning is offered, focusing on its use in Informatics Technology Education classrooms. This study utilises the literature study approach to complete this study, which entails acquiring and analysing data from various sources. Existing theoretical concepts, such as problem-based learning, do not link theory with relevant research as well as new pedagogical theories. In problem-based learning, objectives and learning outcomes take precedence over time and resources. According to this study, problem-based learning will increase student learning assessment in the future.
Influence Android-Based Learning to Self -Regulated Learning, Entrepreneurship, and Mathematical Literacy
Authors: Surani Dewi , Komarudin Mamay , Kusumawati Nugrahini , Kusuma Jaka Wijaya
Published: January 2022

The Covid-19 pandemic requires students to study online and at home. Online learning has its challenges because educators must choose suitable media in delivering material. This study aims to find a comparison of learning independence, entrepreneurial spirit and mathematical literacy before and after using Android media. This research method uses quantitative methods with pre and post group design. This research was conducted in one of the junior high schools in Serang on social arithmetic material. The instrument used is a learning independence questionnaire and an entrepreneurship spirit questionnaire. Another instrument is a mathematical literacy test. Data analysis used paired sample t-test. The conclusion from the results of this study is that there are differences in learning independence, entrepreneurial spirit and mathematical literacy before and after using android media.