bluuebunny/crossref_metadata_2025_split huggingface dataset:
Desafíos organizacionales y ambientales en el procesamiento de materiales de construcción: estudio de caso Trituradora Caliyaco Municipio de Mocoa Departamento del Putumayo, Colombia
Authors: Quiroz Apraez Juan Diego 
Published: March 2021

Desde la perspectiva organizacional y ambiental se analizaron y evaluaron las actividades productivas de la Trituradora Caliyaco, cuyo objeto es la oferta de materiales para construcción. La mayoría de empresas dedicadas a este tipo de aprovechamiento minero carecen de asesoría para mejorar la efectividad sus procesos productivos con buenas prácticas amigables con el ambiente, respetuosos de la normatividad sectorial, con responsabilidad social y mínimos impactos al medio ambiente.

Con base en detallada observación en campo de los procesos productivos en la Trituradora Caliyaco, se identificaron las actividades con los respectivos efectos en el ambiente, y se propusieron recomendaciones para optimizar el procesamiento de la materia prima, así como los correspondientes lineamientos ambientales bajo criterios de sostenibilidad y responsabilidad social.
Marshall–Olkin Alpha Power Lomax Distribution: Estimation Methods, Applications on Physics and Economics
Authors: Almongy Hisham Mohamed , Almetwally Ehab Mohamed , Mubarak Amaal Elsayed 
Published: March 2021

In this paper, we introduce and study a new extension of Lomax distribution with four-parameter named as the Marshall–Olkin alpha power Lomax (MOAPL) distribution. Some statistical properties of this distribution are discussed. Maximum likelihood estimation (MLE), maximum product spacing (MPS) and least Square (LS) method for the MOAPL distribution parameters are discussed. A numerical study using real data analysis and Monte-Carlo simulation are performed to compare between different methods of estimation. Superiority of the new model over some well-known distributions are illustrated by physics and economics real data sets. The MOAPL model can produce better fits than some well-known distributions as Marshall–Olkin Lomax, alpha power Lomax, Lomax distribution, Marshall–Olkin alpha power exponential, Kumaraswamy-generalized Lomax, exponentiated Lomax and power Lomax.
Clinico-radiological and functional outcomes of distal tibia extra-articular fractures (AO 43A1-A3) managed by minimal invasive plate osteosynthesis in a tertiary care hospital: a series of 21 patients
Authors: Singh Pankajvir , Ghani Abdul , Singh Simran Preet , Singh Amarjeet 
Published: March 2021

<p class="abstract"><strong>Background:</strong> The fractures around distal tibia are challenging injuries due to limited soft tissue coverage, precarious blood supply and subcutaneous nature of the tibia. Minimal invasive plating for distal tibia fracture is a very good option for treatment, as this does not disrupt the blood supply and cause very little insult to soft tissue.</p><p class="abstract"><strong>Methods:</strong> 21 patients with extra-articular fractures of distal tibia were operated using minimally invasive plate osteosynthesis (MIPO) technique of plating. They were followed up to six months in terms of radiological union and functional outcomes, and complications. Functional outcome was assessed using Olerud Molander scoring system.<strong></strong></p><p class="abstract"><strong>Results:</strong> Good to excellent results were obtained in almost all the patients using Olerud and Molander scoring system, mean score being 80. These results were in comparison with the studies done earlier.</p><p><strong>Conclusions:</strong> Our study concluded that clinico-radiological and functional outcomes of distal tibia extra-articular fracture managed by MIPO technique of plating are satisfactory with minimal complications. </p>
Problems in the differential diagnosis of abdominal non-organ tumors
Authors: Kolobanova E. S. , Medvedeva B. M. 
Published: March 2021

Rationale: The differential diagnosis between lesions requiring surgical intervention and those necessitating medical treatment poses a significant problem for current imaging methods of fat-containing masses in the small intestine mesenterium.Aim: To identify differential diagnostic criteria for various fat-containing neoplasms of abdominal cavity at the preoperative stage.Materials and methods: This retrospective study included data from 29 patients (16 women and 13 men, aged 32 to 81 years, mean age 56 years) with fat-containing masses in the small intestine mesenterium who had undergone preoperative examination at N.N. Blokhin National Medical Research Center of Oncology from 2016 to 2020. Abdominal computed tomography (CT) with intravenous contrast enhancement and assessment of the size, contours, structure and involvement of main vessels was performed in all patients. To interpret single soft tissue nodes within the mass, we used our own list of main CT symptoms (number, size, shape, contours and structure of nodes, degree of their contrast enhancement, and maximal amplification).Results: Fat-containing abdominal masses were morphologically verified as follows: mesenteric panniculitis 13 (45%), well differentiated liposarcoma 10 (35%), lymphoproliferative disorders 4 (14%), lipoma and Castleman disease 1 case each (3%). Twelve (12) of 29 patients (41%) had surgery for various types of tumors, while 17 (59%) patients received appropriate medical treatment after a puncture biopsy-based morphological diagnosis. The CT sensitivity for the detection of fat-containing abdominal neoplasms in our series was 93,1%. The paper describes the radiological signs of the above mentioned mass types with an emphasis on the complexity of their diagnosis.Conclusion: In most cases, CT data can accurately differentiate abdominal liposarcomas from other benign and malignant masses in the small intestine mesenterium.
dupla exclusão
Authors: Trizoli Talita 
Published: March 2021

As narrativas já institucionalizadas sobre o movimento concretista no Brasil e suas reverberações abrangem referências internacionais para os artistas integrantes do movimento, e os conflitos de hegemonia cultural entre os dois polos econômicos do país na época: Rio de Janeiro e São Paulo. A considerável produção analítica sobre o período e seus agentes tem sido uma das mais férteis dentro da historiografia da arte brasileira, abarcando críticos, manifestos, obras, artistas e locais de circulação – e no entanto, apenas recentemente alguns pesquisadores e curadores têm apontado o caráter machista de alguns membros dos grupos, e as dificuldade de consolidação profissional das artistas mulheres que participavam dos projetos e reuniões. Nesse sentido, Judith Lauand, a única artista mulher a participar oficialmente do grupo Ruptura em São Paulo, é caso emblemático dos movimentos de revisionismo histórico feminista, mas junto a ela temos também Jandyra Waters ocupando um lugar ainda frágil no sistema, sem o devido cotejamento. Ainda que essas duas artistas tenham tido uma circulação considerável no meio artístico brasileiro, sua recepção crítica e inserção histórica não é a mesma de seus pares masculino, portanto, são casos que precisam ser revisitados a fim de esgarçar a malha historiográfica.
PENGARUH MASSA MAGNESIUM SILIKAT (MAGNESOL) DAN WAKTU OPERASI PADA PROSES PEMURNIAN BIODIESEL
Authors: A. Jatyaraga Bagas , K. Atmadja Leonardo , A. Anggorowati Dwi , Setyawati Harimbi 
Published: March 2021

Abstrak-Proses pemurnian biodiesel menggunakan metode pencucian kering telah berhasil dilakukan. Biodiesel yang digunakan berasal dari minyak jelantah. Secara keseluruhan biodiesel yang dimurnikan dengan metode pencucian kering mengalami peningkatan kualitas. Waktu reaksi dan jumlah magnesol yang digunakan sangat mempengaruhi proses pemurnian biodiesel. Kondisi terbaik didapatkan pada waktu reaksi 60 menit dan jumlah magnesol 2 %w/w. Densitas, viskositas,titik nyala, angka setana, gliserol bebas dan gliserol total mengalami peningkatan kualitas masing-masing sebesar 3%, 34%, 7%, 22%, 48% dan 38%. Kata Kunci: biodiesel, pencucian kering, magnesol Abstract-Biodiesel purification process using a dry cleaning method has been successfully performed. Biodiesel is derived from used cooking oil. Overall purified biodiesel dry washing method to increase the quality. Reaction time and amount used magnesol greatly affect biodiesel purification process. The best conditions obtained at reaction time of 60 minutes and the amount of magnesol 2% w / w. Density, viscosity, flash point, cetane number, free glycerol and total glycerol increased the quality are 3%, 34%, 7%, 22%, 48% and 38%, respectively. Keyword: biodiesel, dry cleaning, magnesol
STUDI KINETIKA ADSORPSI Pb MENGGUNAKAN ARANG AKTIF DARI KULIT PISANG
Authors: Sanjaya Ari Susandy , Agustine Rizcy Paramita 
Published: March 2021

Abstrak- Logam Pb merupakan salah satu pencemar lingkungan dan dapat mengakibatkan kematian atau gangguan kesehatan dalam waktu singkat. Salah satu cara untuk mengatasi masalah pencemaran Pb adalah dengan menggunakan arang aktif dari kulit pisang. Penelitian ini bertujuan untuk menentukan model kinetika yang sesuai pada proses adsorpsi Pb dengan melihat daya jerap arang aktif kulit pisang dalam berbagai variasi massa (1 g; 1,5g dan 2 g) dan waktu kontak (20 menit, 40 menit dan 60 menit). Analisa Kinetika didasarkan pada kinetika orde nol, orde satu dan orde dua serta menentukan kapasitas maksimum adsorpsi arang atif kulit pisang terhadap logam Pb. Persamaan yang digunakan dalam proses adsorpsi adalah persamaan adsorpsi Isoterm Langmuir dan Freundlich. Dari hasil analisa, waktu optimum adsorbsi terjadi pada waktu 60 menit. Kinetika adsorbsi logam Pb dengan arang aktif dari kulit pisang pada massa 1 dan 2 g mengikuti model kinetika orde 2, sedangkan pada massa 1,5 g mengikuti kinetika orde 0. Persamaan adsorpsi Langmuir lebih sesuai untuk isotherm adsorpsi pada penelitian ini. Adsorpsi Pb oleh kulit pisang yang sesuai dengan pola isotherm adsorpsi Langmuir mengindikasikan bahwa adsorpsi hanya berlangsung satu lapis (monolayer). Kapasitas adsorpsi maksimum ditunjukkan oleh nilai a yang besar, yaitu 1,4582 pada massa 1 g sedangkan kekuatan interaksi antara ion Pb2+ dengan kulit pisang terjadi pada massa 2 g yang ditunjukkan dengan nilai kL yang besarnya 0,409 Kata kunci : kinetika adsorpsi, arang aktif, kulit pisang, logam Pb Abstract- Lead metal is one of environment polluter and can cause decease or health problems in sort time. The way to solve this problem is with used the carbon active from banana peel. This research is intend to find the kinetics model that appropriate in Pb adsorption process by knowing absorption of banana peel carbon active within mass variations (1; 1,5 and 2 g) and contact time (20, 40, and 60 minutes). Kinetics analysis are based from orde zero,one, and two and find the maximum capacity of adsorption from banana peel carbon active to lead metal. Equation which using at the adsorption process are Langmuir and Freundlich isotherm equations. From the analysis results, optimum time is at 60 minutes.kinetics of Pb absorption with carbon active from banana peel in mass 1 and 2 gr following kinetics model orde 2, then in mass 1,5 g following kinetics model orde 0. Langmuir equation is more appropriate in this research. Pb absorption from the banana peel that appropriate to Langmuir isotherm system is indicates adsorption was occur in one layer (monolayer). Maximum adsorption capacity is showing by the bigger value from a, that is 1,4582 in mass 1 g then interaction power of Pb with the banana peel was occur in mass 2 gr which showing with the value of kL is 0,4090. Keywords : adsorption kinetics, carbon active, banana peel, Pb metal
PELOS (DES) CAMINHOS DA POESIA
Authors: Cavalcante de Matos Solange , Da Silva Nunes Raimunda , Cristina Testa Eliane 
Published: March 2021

O presente texto trata-se de uma entrevista com o poeta marginal Pedro Tostes, o qual escreve poesias desde muito cedo, quando se descobriu no vasto mundo da escrita poética. É produtor cultural, mesmo não se considerando empreendedor no mercado da literatura, vive de poesia de forma audaciosa, resistente e marginal. Desde 2003, começou uma jornada pelo Brasil para levar sua poesia a diferentes locais como: feiras, universidades, congressos, espaços culturais diversos, etc., vivendo mediante a compreensão de que esta ação seria uma forma de “popularizar” a literatura. O escritor já tem vários livros publicados, sendo o útimo deles "Na Casamata de Si" (Patuá, São Paulo, 2018). Acreditamos que Tostes seja um poeta visionário e que não tenha medo de se expor, principalmente, em seus diferentes modos de ver a vida/poesia. Concebemos a poesia como um modo de trilhar muitas experiências estéticas, e Tostes tem experimentado amplamente com/a linguagem. Sabemos que viver de poesia no Brasil é um grande desafio, especialmente por se tratar de um “país com vários problemas nos campos educacional e cultural” (para usarmos as palavras de Tostes, obtida nesta entrevista). E mesmo diante de tal situação, Tostes tem incentivado os jovens a lerem e a se deixarem afetar pela poesia. Tostes pode ser relacionado à poesia marginal no sentido mais utópico e implicado à força da poesia para abrir (des)caminhos na vida, a começar pela ideia de ocupar as periferias, com saraus e Slams. Em seu último trabalho, “Na Casa Mata de Si” (Patuá/SP, 2018), Tostes nos mostra o seu lado de poeta “guerrilheiro” e chama a atenção, por meio de seus versos, para a guerra do “presente”, uma guerra, aliás, tanto interna como externa a nós. Em entrevista realizada via e-mail, Tostes nos faz revelações da sua vida como escritor e de muitos dos seus (des)caminhos no mundo da poesia.
RESENHA DE LIVRO O ENSINO DE LITERATURA AFRICANA
Authors: Villavicencio Yessy , Grajales Melian Ivan Gabriel 
Published: March 2021

O presente texto propõe uma abordagem ao livro O ensino de literatura africana: textos, sujeitos e práticas, organizado pelos doutores Dernival Venâncio Ramos Júnior e Márcio de Araújo Melo (2018, 178 páginas) e publicado pela editora da Universidade Federal do Tocantins (EDUFT). A obra resenhada expõe algumas das principais questões do ensino da literatura africana nas línguas portuguesa e afro-brasileira, por pesquisadores e professores no contexto brasileiro, em particular, a universidade citada.
Evaluation of working length determination based on the analysis of cone-beam computed tomographic images and an electronic apex locator: a retrospective study*
Authors: Pietrzycka Krystyna , Radwański Mateusz , Pawlicka Halina 
Published: March 2021

Abstract

Introduction
Determining the length of a root canal is a significant outcome predictor for endodontic treatment. The aim of this retrospective, clinical study was to evaluate the accuracy of working length (WL) determination using pre-existing conebeam computed tomography (CBCT) images and to compare them with data of the clinical WL determined with an electronic apex locator (EAL) in treated teeth, found in patient records.

Materials and methods
Thirty five medical records of patients who underwent root canal treatment (RCT) by an endodontist in a private dental practice in Łódź, Poland were analysed. Evaluations were conducted on the data concerning: the WL of the treated tooth as found in the patient’s records, the RadioVisioGraphy (RVG) image after final obturation used as a control, and the CBCT scan before RCT. The Shapiro–Wilk normality test and Student’s t-test were used in statistical analysis. The significance level was set at p < 0.05.

Results
There were no statistically significant differences between compared groups in terms of WL determined with an EAL than CBCT (p > 0.05). In the case of medical diagnosis (pulpitis vs. necrotic pulp) and treatment (primary vs. retreatment), the obtained results were also statistically insignificant (p > 0.05).

Conclusions
This retrospective, clinical study showed that CBCT scans can be successfully used for endodontic WL determination. Future investigations are needed to evaluate whether pre-existing CBCT scans may replace initial periapical radiographs (PARs).
Radiopaque gauze migrating into the intestine – a case presentation
Authors: Pupka Dominika , Szajerka Tobiasz , Jabłecki Jerzy 
Published: March 2021

Abstract
Despite the meticulous monitoring of surgical material using the WHO Surgical Safety Checklist, gauze sponges and surgical instruments continue to be left inside patients after operations. It is an important issue for surgeons, operating room nurses and the entire medical team. Foreign bodies retained in the system may cause many disorders and result in potentially serious consequences for patients, including death. As well as this, further procedures are needed to remove them and treat any subsequent complications. Retained foreign bodies are rare, but intraluminal migration of the foreign body should be considered extraordinary. Very few cases have been reported so far. The authors believe that it is desirable to perform a wide range of diagnostic imaging in such cases.
The influence of changes in the form of physician postgraduate residency training on their ability to perform post-traumatic examination as an emergency procedure
Authors: Denisiuk Maciej , Pakulski Cezary 
Published: March 2021

Abstract

Introduction
Post-traumatic examination methods have been developed for the easier and more efficient management of trauma patients. Performed according to a scheme, post-traumatic examination must be well-learned and repeatedly practised. Training for this has radically changed in recent years in Poland.
The aim of this study was to compare the effectiveness of 2 different forms of physician postgraduate residency training by assessing how well trainee physicians carry out post-traumatic examinations.

Materials and methods
The study involved 2 groups of trainee physicians who were tasked with performing a full post-traumatic examination on simulated patients. Group I consisted of 81 physicians who had taken part in postgraduate residency training in 2011, and group II was comprised of 63 trainee physicians who had undergone such training in 2015. A Laerdal MegaCode Kelly manikin was employed in the project. All simulated patients had the same external injuries and vital function parameters.

Results
None of the physicians in group I correctly carried out all 4 procedures for preliminary assessment (consciousness, airway patency, breath, and blood circulation), and only 7.14% managed to correctly perform 3 of these procedures. In group II, all 4 procedures were executed correctly by 9.52% of the physicians, and 3 procedures by 14.29% (p < 0.001). Quick post-traumatic examination was performed correctly by 4.76% of the physicians from group II but by none of the physicians from group I (p < 0.05).

Conclusions
In both groups of trainee physicians, the ability to recognize a life-threatening situation and to perform a posttraumatic examination was inadequate. Postgraduate residency training in both its previous and present form did not guarantee a satisfactory knowledge in this subject.
Lead – factors affecting its content in bone tissue
Authors: Brodziak-Dopierała Barbara 
Published: March 2021

Abstract
Lead is an element whose presence in the environment results mainly from man’s activities. It infiltrates the bodies of living organisms in many ways; in the human body, it has a multidirectional activity, causing anemia, kidney damage, mental retardation in children, genotoxicity, impaired immune function, damage to the nervous system and an inhibition of heme synthesis. Lead also affects bones; its concentrations there, in contrast to soft tissues, are dependent on exposure and increase throughout ones lifespan. This element is the most often studied and described metal in the bone tissue. The aim of this study was to determine the factors that influence the content of lead in the bone tissue and trace its content in this tissue based on literature data. The analysis of the collected literature showed an incredibly wide range of lead content in human bones was observed. This could be due to the different methods of determination (AAS, ICP-AES, K x-ray fluorescence) and the weight of the sample (dry or wet).
Experimental Analysis of Water/Oil Displacement Tests in Horizontal Pipe
Authors: Leuchtenberger Roberto Fernando , Biazussi Jorge Luiz , Verde William Monte , Castro Marcelo de Souza , Bannwart Antonio Carlos 
Published: March 2021

Summary
Production shutdowns occur often throughout the life cycle of an oil field. In offshore fields, shutdown situations are accompanied by an intense heat exchange between pipeline and cold water, which exponentially increases oil viscosity. Such an event may lead to serious difficulty to restart the production, or even render it unfeasible, especially for heavy oil fields. Therefore, a preventive procedure is required to remove the ultraviscous oil from pipelines and risers; for example, by pumping diesel or methanol in a flush procedure. Designing an efficient cleanup procedure is therefore essential in terms of time, amount of fluid injected, and pumping system requirements. However, the amount of research published in this area is limited. In this paper, we propose a comprehensive analysis on how the displacement of a viscous liquid by a less-viscous liquid occurs in a pipeline through footages in different segments, varying the injection velocity. Two mineral oils with different viscosities and tap water were used as working fluids for this study. The experimental setup was built with a horizontal 10-m-long acrylic pipe with 19-mm internal diameter. Two high-speed cameras were placed both in the inlet and outlet segments. Our results demonstrate how water displaces viscous oil in a pipeline, showing different flow configurations as superficial water velocity increases, depending on the oil viscosity and distance from the inlet. A dimensionless analysis was performed by a combination of the forces that govern the flow and dimensionless groups found in literature. The results show an expected area of optimum values regarding cleaning time according to flow configuration. A unidimensional model using a logistic function was proposed and showed a good agreement with the experimental data. The model itself proven to be an easy tool for industry and academic purposes, supporting even more robust and elaborated models in the future.
Methods for estimating quantities and qualities (Q&Q) of faecal sludge: field evaluation in Sircilla, India
Authors: Prasad Prerna , Andriessen Nienke , Moorthy Anantha , Das Amrita , Coppens Kayla , Pradeep Rohini , Strande Linda 
Published: March 2021

Abstract
Estimates of accumulated quantities and qualities (Q&Q) of faecal sludge are essential for developing city-wide management plans. However, standardized approaches are lacking, and examples in scientific literature make use of diverse methodologies and parameters, making their comparability and transferability difficult. This study field-tested an approach for estimating Q&Q in Sircilla, India, and compared three methods for measuring accumulated sludge: (1) faecal sludge accumulation rate from in situ measurement with a core sampler; (2) faecal sludge accumulation rate with volume emptied by desludging truck; and (3) sludge blanket accumulation rate in situ with a core sampler. Measurements were taken at households and commercial establishments, samples were analysed for characteristics, and demographic, environmental, and technical data were collected with a questionnaire. The median total solids (TS), volatile solids (VS), and chemical oxygen demand (COD) concentrations for all containments were 26.8, 17.8, and 32.0 g/L, respectively. The median faecal sludge accumulation rate estimated with the core sampler and truck were 53 and 96 L/cap·year, respectively. The median sludge blanket accumulation rate was 17 L/cap·year. Continued data collection in this fashion will lead to a better understanding of what is accumulating in onsite containments at regional levels.