bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seasonal patterns in phytoplankton growth, composition, and predominance in relation to water quality at Northwest El-Manzala Lake, Egypt
Authors: Deyab Mohamed , Abu Ahmed Seham , Ward Fatma 
Published: September 2020

AbstractThe physicochemical properties and phytoplankton community structure were investigated seasonally at four stations representing Northwest El-Manzala Lake, Egypt, during 2019. Results indicated wide local and seasonal variations in the concentrations of various physicochemical parameters. There was a noticeable variation in levels of nitrogen and phosphorus forms; higher ammonia, nitrite, and nitrate contents of 11.6 (in autumn), 2.28 (in winter), and 2.32 mg L-1 (in autumn), respectively, were detected at Shatt Greba (site IV). Total-P and ortho-P exhibited higher levels of 7.14 and 0.96 mg L−1, respectively, at site IV in summer. The greatest amounts of sodium, potassium, calcium, barium, and lithium were 102.88 g L−1, 9.12 g L−1, 8.56 g L−1, 345.8 mg L−1, and 1.62 mg L−1, respectively, during summer. Two-way ANOVA presented a highly significant local and seasonal effect of physicochemical parameters on phytoplankton biomass. There were high levels of autumn algal biomass (65.96 mg L−1) and low levels of winter algal biomass (32.28 mg L−1). Cyanophyta, Chlorophyta, and Pyrrophyta dominated in the autumn, whereas Bacillariophyta dominated in the winter. Cyanophyta and Pyrrophyta biomass showed high local variations in contrast to Bacillariophyta and Chlorophyta. The species diversity index revealed that the study area was mildly to moderately polluted water.
Simulation of nitrogen and phosphorus pollution in typical agricultural and forested basins as well as relevant reduction effect based on SWAT model
Authors: Li Wu , Zhe Chen , Hui-ying Liu , Dun-qiu Wang 
Published: September 2020

Abstract
Non-point source nitrogen and phosphorus pollution is a critical threat to aquatic ecosystems and a potential risk to drinking water safety. To precisely control nitrogen and phosphorus pollution in the river basin, in this study, we identified key pollution areas of the river basin, analyzed the main characteristics of pollution sources as well as their contribution to the river basin pollution, and conducted simulation analysis on reduction measures based on the SWAT model. The results showed the following. (1) The simulation effect of the calibrated model was good, and sub-basins 3, 39 and 96 were the key source areas, the main sources of pollution were combined pollution from livestock and poultry breeding and planting industry. (2) Crops had the largest input and output for both nitrogen and phosphorus, the output of which was 6,137.8 t/a and 562.4 t/a respectively. The urban point sources had the highest output rates of nitrogen and phosphorus, 75.7% and 67.5% respectively. (3) With the optimal combination of reduction measures, nitrogen and phosphorus were reduced by 1,438.9 t and 85.3 t respectively, i.e., the reduction rates were the highest. The reduction effect for total nitrogen was better than that for total phosphorus.
Use of bottom slots and submerged vanes for controlling sediment upstream of duckbill weirs
Authors: Tajari Mahla , Dehghani Amir Ahmad , Meftah Halaghi Mehdi , Azamathulla Hazi 
Published: September 2020

Abstract
Duckbill weir is one of the water level control structures in irrigation networks, which is of interest to many engineers. Sediments transported in irrigation networks that accumulate upstream of duckbill weirs cause problems in operation, and affect the upstream water level. In this paper, submerged vanes and bottom slots are investigated for flushing the sediment downstream of the said weir. The experiments were conducted in a rectangular flume, 12 m long, and 0.6 m wide. The vanes placed in four sections were perpendicular to the sidewall. Flow-3D software was used for simulation of flow and sedimentation patterns. The results showed that submerged vanes create a secondary flow which is very useful for flushing the sediment, especially in the value of (H is head over the sidewall and P is the weir height). Further, the results showed duckbill weir efficiency (which is defined as the ratio of sediment trap to flow capacity of the weir) is as high as 47% (for values of H/P = 0.1–0.5 and total models). Finally, image processing results showed a maximum relative error of 14.4% for the simulation of the sediment pattern with Flow-3D software.
Experimental study on filtration effect of oilfield sewage based on new polyurethane modified materials
Authors: Liu Bingcheng , Li Hongsong , Liu Ning , Jia Wenguang 
Published: September 2020

Abstract
In the process of oilfield wastewater treatment, the polymer-modified materials with special wettability have been recognized by many scholars for their high filtration efficiency and good adsorption effect. In this paper, we used micro-computed tomography scanning and infrared scanning technology to further explore the internal structure and surface chemistry of polyurethane modified materials and then established an experimental platform for the filtration performance of polyurethane modified materials. The change of suspended solids concentration and oil content in the sewage was tested under different filtration rate, filter layer thickness, and water quality. The results showed that the porosity of the filter material and the oil-absorbing material was 65.85% and 56.03% respectively, and the difference in the number of oxygen-containing functional groups on the surface of these two materials indicated different adsorption force for sewage impurities. And the polyurethane modified materials had good filtration performance. Through these experiments, we demonstrated that the quality of water filtrated by the polyurethane modified materials met the requirements of the ‘National Comprehensive Wastewater Discharge Standards’, and the filtration efficiency for suspended particles and oils in oily sewage was higher than 80%. These materials have important practical significance for the harmless treatment of oily sewage.
La(OH)3 nano-rods/polyacrylonitrile nanofibers: fabrication, characterization and application for phosphate removal
Authors: He Jiaojie , Yang Yue , Xu Yuhong , Wang Zichuan , Xu Bing , Huang Yuheng , Yang Liwei 
Published: September 2020

Abstract
In this study, an excellent phosphate adsorbent was prepared for removing phosphate to an extremely low concentration. The La(OH)3 nano-rods stabilizing in polyacrylonitrile (PAN) nanofibers (PLNFs) were prepared by electrospinning and a subsequent in situ precipitation. PAN nanofibers were employed as the matrix of the composite nanofibers, where the well-dispersed La(OH)3 nano-rods were encapsulated as the active species for highly efficient phosphate capture owing to the strong binding between phosphate and lanthanum. On account of the nano-structure, the maximum phosphate adsorption capacity was 151.98 mg P/g (La), much higher than the result of La(OH)3 nano-crystal, produced by precipitation without PAN or any organic surfactants. Moreover, the PLNFs could remove phosphate (2 mg P/L) to an extremely low concentration within 20 min, which could lead to a nutrient deficient condition to protect water quality and ecosystem. The optimization of PLNFs design was implemented through parameter adjustment of electrospinning. Lanthanum salt content, humidity, concentration of solution and applied voltage were chosen to analyze the influences on the composition, diameter and morphology of the nanofibers, giving the result that the most effective adsorbent was the PLNFs with spider-web-like nano-structures.
Effect of Slope on Infiltration Capacity and Erosion of Mount Merapi Slope Materials
Authors: Rahardjo Adam Pamudji 
Published: September 2020

Infiltration which occurs on slope has a specific behavior that can be parameterized. One of the reasons is because the slope generates less ponding on the sloping soil surface. This condition affects infiltration rate and surface runoff proportion of water from any kind of rainfall distribution in time. Since surface runoff tends to be higher, erosion rate is also to be higher on slope. The slope steepness is the most important parameter of a slope. In this study, the effect of slope steepness on infiltration capacity and erosion rate of Mount Merapi bare slope material were tested in a laboratory using rainfall simulator. Three values of slope steepness of 36%, 47%, and 58% were used. The rainfall intensity was set constant and was found has rate of 116,312 mm/hour. The infiltration rate was measured by volumetric balance principle and the erosion rates were measured by collecting the eroded grains at the downstream end tank. Infiltration rate was evaluated by using Horton method and the average erosion were analyzed from the eroded grain data for each test. After fitting the recorded infiltration rate data to the Horton equation, the infiltration capacity was obtained. The results were the relationship between slope steepness and the affected the infiltration capacity and erosion for each test. Infiltration capacity is found to increase and the decrease with the increase of slope steepness while erosion rate is found to increase on the steeper slope. The increase of erosion range is between 15% to 33% for each 1o increase of slope steepness. In addition, polynomial and exponential equations were developed to express the relationship between slope steepness and infiltration capacity and also the erosion rate.
PENGUATAN UPAYA PENEGAKAN HUKUM “KEJAHATAN TERKAIT DENGAN PERIKANAN” MELALUI REGIONAL COOPERATION AGREEMENT AGAINST CRIMES RELATED TO FISHERIES
Authors: Mawar Rini Ayu 
Published: September 2020

AbstractThe research aims to analyse the urgency of the establishment of the Regional Cooperation Agreement Against Crimes Related to Fisheries. Considering the broad and emerging nature of Crimes Related to Fisheries, however, could not be solved accordingly by finding the recognition of IUUF as the form of Transnational Organized Crime. The initiative on establishing such agreement with the regional and market approach is trusted as the first practical solution taken by Indonesia to reduce the existence of Crimes Related to Fisheries, which at the same time strengthening the law enforcement for such crimes within the region. IntisariPenelitian ini bertujuan untuk menganalisa urgensi pembentukan “Perjanjian Kerjasama Regional Melawan Kejahatan Terkait dengan Perikanan”. Sifat “Kejahatan Terkait dengan Perikanan” yang luas serta terus berkembang tidak dapat serta merta diatasi dengan pengategorian IUUF sebagai bentuk dari Transnational Organized Crime. Inisiatif pembentukan perjnajian kerjasama dengan basis pendekatan kawasan dan pendekatan kawasan dipercaya mampu menjadi langkah awal bagi Indonesia serta menguatkan penegakan hukum untuk mengurangi kejahatan terkait di kawasan regional.
MITIGASI SAMPAH ANTARIKSA: MENINJAU KESIAPAN REGULASI NASIONAL
Authors: Suryaatmadja Shannon 
Published: September 2020

AbstractThe rapid development of space activities has increased the risk of space object collisions in orbit, particularly of space debris. This situation potentially harms satellites and endangers space missions. To date, international efforts generally result in non-legally binding products or soft laws, providing only guidance to form a national legal framework in mitigating space debris. This article aims to review Indonesia’s efficacy in regulating its space activities to minimize space debris generation and risks. It also examines mitigation efforts in several other countries with the intention of providing input for the current national legal framework. IntisariPesatnya perkembangan kegiatan antariksa meningkatkan risiko tabrakan antar objek antariksa pada orbit bumi, terutama sampah antariksa. Situasi ini berpotensi merusak satelit hingga membahayakan keberlangsungan misi antariksa. Hingga kini, upaya internasional baru sanggup melahirkan produk hukum tidak mengikat, sehingga hanya mampu mengarahkan negara untuk menyusun kerangka hukum nasional dengan memperhatikan perihal mitigasi sampah antariksa. Artikel ini akan mengkaji kesiapan regulasi nasional untuk meminimalkan risiko timbul dan bertambahnya sampah antariksa. Dibahas pula perbandingan upaya mitigasi pada beberapa negara lain guna memberi masukan bagi Indonesia.
The Need of Trusted Primary Care: Lesson Learnt from The COVID 19 Outbreak in Indonesia
Authors: Pakasi Trevino Aristarkus 
Published: September 2020

Indonesia declared COVID 19 as an outbreak since March 2020, where the President of Indonesia announced the fist two cases who were cured already. Since then a lot of publication, as well as information, spread out through social media. The hoax buster of the government had already put 134 hoaxes in the website only in one month 1. Thus, one can imagine how difficult for Indonesian people to understand the situation of the outbreak and to properly respond to it. Cases increased exponentially and it was estimated that Indonesia would reach 20,000 cases at the end of March 2020 2. The fact is up till the 6th of April 2020, Indonesia reported 2,491 cases 3.What happens to the estimation? Was it wrong or a lot of underreported cases occur in the community? Is it because of the intervention that the government launched effectively?
Causas del color amarillo de la grasa de canales de bovinos finalizados en pastoreo
Authors: Mora Izaguirre Ofelia , Shimada Miyasaka Armando 
Published: September 2020

Artículo originalmente publicado en:Mora Izaguirre O, Shimada Miyasaka A. Causa de color amarillo de la grasa de canales de bovinos finalizados en pastoreo. Veterinaria México. 2001;32(1):63–71.- - -
En México la mayor parte de los bovinos productores de carne son finalizados en pastoreo. Se ha observado que el tejido adiposo de estos animales puede presentar una coloración cuasi amarilla, que provoca su rechazo por parte del consumidor y la consecuente pérdida económica para el productor. El color casi amarillo de la grasa en bovinos se debe a los carotenoides provenientes de su ingesta. En esta revisión se aborda el metabolismo de estos compuestos en los ámbitos digestivo y tisular. Aunque se conocen algunas soluciones prácticas al problema, éstas son económicamente inviables; en este contexto, es necesario estudiar más sobre las causas fisiológicas de la deposición del pigmento con el propósito de encontrar mejores soluciones
To the question of concrete creep in the soil environment
Authors: Ter-Martirosyan Zaven G. , Bakhmisov Viktor V. 
Published: September 2020

Introduction. Concrete creep coupled with specific soil properties represent a problem for the analysis of reinforced concrete structures in geotechnical engineering. The mission of this research is to make a problem statement and to outline its potential solutions.
Materials and methods. In the course of the research, the finite element method was applied and the review of works, covering various problem aspects, was performed.
Results. Concrete creep in respect of a diaphragm wall is most vividly manifested in deflections and stresses in struts; as for piles, concrete creep is manifested by the longitudinal axial force distribution along the length. The co-authors have demonstrated that is necessary to single out the excavations device under bentonite slurry protection from the viewpoint of the construction technology. In this case, a 5–10 mm thick water-saturated filter cake is formed at the contact between soil and concrete. The filter cake retains its permanent water penetrability at some level that depends on pressure and injection time; therefore, concrete in trench cannot be considered isolated from filtration water flows. Following the concrete mix casting into the trench, water saturated filter cake is consolidated, and this enables the authors to make a conclusion about its resistance to vapour penetration.
Conclusions. If water saturation is equal to Sr > 0.5–0.6 and if excavation works are performed under the protection of the bentonite slurry, relative air humidity of soil RH can be considered to be equal to 100 %, and if water saturation Sr < 0.5–0.6, RH needs to be analysed. Identification of concrete moisture content depending on relative air humidity, the groundwater filtration flow and influence of the filter cake at the contact between ground and concrete make it possible to take account of the effect of soil conditions on concrete creep.
Efficiency assessment of urban planning transformations: economic and legal aspects
Authors: Ershova Svetlana А. , Shishelova Svetlana А. , Orlovskaya Тamara N. 
Published: September 2020

Introduction. A discrepancy between legislative requirements for the compulsory recognition of economic factors in the process of drafting urban planning documents, on the one hand, and the unavailability of an approved implementation procedure, on the other hand, makes a substantial impact on decision making processes that deal with urban planning transformations. The unavailability of (a) unified approaches to the assessment of the economic efficiency of urban planning solutions, (b) an approved efficiency assessment procedure or (c) a database decelerates the process of making well-grounded urban development decisions. Therefore, development of a conceptual framework for the efficiency assessment in terms of integrated urban development actions and their implementation procedures is particularly relevant. The subject of this research consists in the study of the regulatory/methodological framework of urban development, and its mission is to analyze the main regulatory problems that accompany the efficiency assessment of urban development.
Materials and methods. The co-authors employed a socio-spatial approach that takes account of objective and subjective factors of a high-quality urban environment at various stages of the urban planning documentation drafting process. Within the framework of this approach, methods of comparative/logical analysis were applied, expert evaluations were made, materials, developed by foreign and Russian scientists, Russian legislative acts, methodological documents were studied with regard to the evaluation of the urban development efficiency.
Results. The co-authors identified gravest theoretical and methodological problems of urban transformation efficiency assessment. An assessment procedure was developed. The co-authors suggested organizing the urban transformation efficiency assessment in the course of drafting urban planning documentation. Principal efficiency assessment stages were identified, and the main objectives of each stage were formulated.
Conclusions. The novelty and practical relevance of this research reside in the fact that the co-authors have identified problems of the legal framework of assessment procedures and suggested a sequential estimation of the economic efficiency of urban transformations so that each subject of urban planning activities followed a unified research-driven decision making procedure.
Bienestar psicológico y ansiedad competitiva: el papel de las estrategias de afrontamiento / Competitive Anxiety and Psychological Well-being: the Role of Coping Strategies
Authors: Cantón-Chirivella Enrique , Checa-Esquiva Irene , Vellisca-González María Yolanda 
Published: September 2020

Resumen: El interés por el estudio del bienestar psicológico (Ryff, 1989) y su relación con las estrategias de afrontamiento se ha producido también en el ámbito deportivo. En esta investigación, se evalúan la ansiedad competitiva, el bienestar psicológico y las estrategias de afrontamiento utilizadas en la competición por 213 deportistas, de cuatro deportes diferentes. Los resultados permiten predecir, a través de los análisis de regresión, la posibilidad de experimentar ansiedad y bienestar psicológico en el contexto competitivo, regulado por el papel mediador de las estrategias de afrontamiento dirigidas a la tarea. Abstract:Interest in the study of psychological well-being (Ryff, 1989) and its relationship with coping strategies has also occurred in sports. In this study, competitive anxiety, psychological well-being and coping strategies are assessed in 213 athletes competing in four different sports. The results predict, through regression analysis, the possibility of experiencing anxiety and psychological well-being in the competitive context, regulated by the mediator of task-directed coping strategies.
Predictores psicológicos de lesión en jóvenes deportistas / Psychological Predictors of Injury in Young Athletes
Authors: Berengüí-Gil Rosendo , Puga Jorge L. 
Published: September 2020

Resumen:En el deporte de competición, una serie de factores fisiológicos, biomecánicos, ambientales y psicológicos interaccionan para provocar la susceptibilidad o un aumento en la vulnerabilidad del deportista a la lesión. Actualmente, se asume la importancia de las variables psicológicas en el origen de la lesión, una serie de investigaciones previas han señalado determinados factores, que podrían predecir las lesiones deportivas. El objetivo del estudio es analizar la influencia de las características psicológicas asociadas al rendimiento deportivo, la ansiedad rasgo competitiva y los estados de ánimo en la ocurrencia de lesiones. Los participantes fueron 115 deportistas integrantes de programas de tecnificación, a los cuales fueron administrados el Inventario Psicológico de Ejecución Deportiva (IPED), Sport Competition Anxiety Test (SCAT) y Perfil de Estados de Ánimo (POMS). Posteriormente, se registraron las lesiones durante un período de 10 meses. Los resultados indican que la autoconfianza y la ansiedad rasgo competitiva fueron predictores significativos del número de lesiones. Además, esta relación entre lesiones, ansiedad y autoconfianza se mantuvo cuando se controló el efecto de otras variables. Se discuten estos resultados y se propone una serie de consideraciones a nivel aplicado. Abstract:In competitive sports a number of physiological, biomechanical, environmental and psychological factors interact to cause increased susceptibility or vulnerability to injury. We now better understand the importance of psychological variables in the origin of injuries, a number of previous studies have identified certain factors that could predict sports injuries. The aim of this study is to analyze the influence of psychological characteristics associated with athletic performance, competitive trait anxiety and mood in injury occurrence. Participants were 115 athletes, members of specialization programs, who were administered the Psychological Inventory on Athletic Execution (IPED), Sport Competition Anxiety Test (SCAT) and Profile of Mood States (POMS). Subsequent lesions were recorded over a period of 10 months. The results indicate that self-confidence and competitive trait anxiety were significant predictors of the number of injuries. Moreover, this relationship between injuries, anxiety and self-confidence is maintained when the effect of other variables is controlled. These results are discussed and a series of considerations at the applied level are proposed.