bluuebunny/crossref_metadata_2025 huggingface dataset:
2021 John N. Insall Award: Aspirin is effective in preventing propagation of infrapopliteal deep venous thrombosis following total knee arthroplasty
Authors: Omari Ali M. , Parcells Bertrand W. , Levine Harlan B. , Seidenstein Ari , Parvizi Javad , Klein Gregg R.
Published: May 2021

Aims

The optimal management of an infrapopliteal deep venous thrombosis (IDVT) following total knee arthroplasty (TKA) remains unknown. The risk of DVT propagation and symptom progression must be balanced against potential haemorrhagic complications associated with administration of anticoagulation therapy. The current study reports on a cohort of patients diagnosed with IDVT following TKA who were treated with aspirin, followed closely for development of symptoms, and scanned with ultrasound to determine resolution of IDVT.

Methods

Among a cohort of 5,078 patients undergoing TKA, 532 patients (695 TKAs, 12.6%) developed an IDVT between 1 January 2014 to 31 December 2019 at a single institution, as diagnosed using Doppler ultrasound at the first postoperative visit. Of the entire cohort of 532 patients with IDVT, 91.4% (486/532) were treated with aspirin (325 mg twice daily) and followed closely. Repeat lower limb ultrasound was performed four weeks later to evaluate the status of IDVT.

Results

Follow-up Doppler ultrasound was performed on 459/486 (94.4%) patients and demonstrated resolution of IDVT in 445/459 cases (96.9%). Doppler diagnosed propagation of IDVT to the popliteal vein had occurred in 10/459 (2.2%) cases. One patient with an IDVT developed a pulmonary embolus six weeks postoperatively.

Conclusion

The results of this study demonstrate a low rate of IDVT propagation in patients managed with aspirin. Additionally, no significant bleeding episodes, wound-related complications, or other adverse events were noted from aspirin therapy. Cite this article: Bone Joint J 2021;103-B(6 Supple A):18–22.
Pain associated with cemented and uncemented long-stemmed tibial components in revision total knee arthroplasty
Authors: Larson Darin J. , Rosenberg John H. , Lawlor Maxwell A. , Garvin Kevin L. , Hartman Curtis W. , Lyden Elizabeth , Konigsberg Beau S.
Published: May 2021

Aims

Stemmed tibial components are frequently used in revision total knee arthroplasty (TKA). The purpose of this study was to evaluate patient satisfaction, overall pain, and diaphyseal tibial pain in patients who underwent revision TKA with cemented or uncemented stemmed tibial components.

Methods

This is a retrospective cohort study involving 110 patients with revision TKA with cemented versus uncemented stemmed tibial components. Patients who underwent revision TKA with stemmed tibial components over a 15-year period at a single institution with at least two-year follow-up were assessed. Pain was evaluated through postal surveys. There were 63 patients with cemented tibial stems and 47 with uncemented stems. Radiographs and Knee Society Scores were used to evaluate for objective findings associated with pain or patient dissatisfaction. Postal surveys were analyzed using Fisher’s exact test and the independent-samples t-test. Logistic regression was used to adjust for age, sex, and preoperative bone loss.

Results

No statistically significant differences in stem length, operative side, or indications for revision were found between the two cohorts. Tibial pain at the end of the stem was present in 25.3% (16/63) of cemented stems and 25.5% (12/47) of uncemented stems (p = 1.000); 74.6% (47/63) of cemented patients and 78.7% (37/47) of uncemented patients were satisfied following revision TKA (p = 0.657).

Conclusion

There were no differences in patient satisfaction, overall pain, and diaphyseal tibial pain in cemented and uncemented stemmed tibial components in revision TKA. Patient factors, rather than implant selection and surgical technique, likely play a large role in the presence of postoperative pain. Stemmed tibial components have been shown to be a possible source of pain in revision TKA. There is no difference in patient satisfaction or postoperative pain with cemented or uncemented stemmed tibial components in revision TKA. Cite this article: Bone Joint J 2021;103-B(6 Supple A):165–170.
Additional distal femoral resection increases mid-flexion coronal laxity in posterior-stabilized total knee arthroplasty with flexion contracture
Authors: Chalmers Brian P. , Elmasry Shady S. , Kahlenberg Cynthia A. , Mayman David J. , Wright Timothy M. , Westrich Geoffrey H. , Imhauser Carl W. , Sculco Peter K. , Cross Michael B.
Published: May 2021

Aims

Surgeons commonly resect additional distal femur during primary total knee arthroplasty (TKA) to correct a flexion contracture, which leads to femoral joint line elevation. There is a paucity of data describing the effect of joint line elevation on mid-flexion stability and knee kinematics. Thus, the goal of this study was to quantify the effect of joint line elevation on mid-flexion laxity.

Methods

Six computational knee models with cadaver-specific capsular and collateral ligament properties were implanted with a posterior-stabilized (PS) TKA. A 10° flexion contracture was created in each model to simulate a capsular contracture. Distal femoral resections of + 2 mm and + 4 mm were then simulated for each knee. The knee models were then extended under a standard moment. Subsequently, varus and valgus moments of 10 Nm were applied as the knee was flexed from 0° to 90° at baseline and repeated after each of the two distal resections. Coronal laxity (the sum of varus and valgus angulation with respective maximum moments) was measured throughout flexion.

Results

With + 2 mm resection at 30° and 45° of flexion, mean coronal laxity increased by a mean of 3.1° (SD 0.18°) (p < 0.001) and 2.7° (SD 0.30°) (p < 0.001), respectively. With + 4 mm resection at 30° and 45° of flexion, mean coronal laxity increased by 6.5° (SD 0.56°) (p < 0.001) and 5.5° (SD 0.72°) (p < 0.001), respectively. Maximum increased coronal laxity for a + 4 mm resection occurred at a mean 15.7° (11° to 33°) of flexion with a mean increase of 7.8° (SD 0.2°) from baseline.

Conclusion

With joint line elevation in primary PS TKA, coronal laxity peaks early (about 16°) with a maximum laxity of 8°. Surgeons should restore the joint line if possible; however, if joint line elevation is necessary, we recommend assessment of coronal laxity at 15° to 30° of knee flexion to assess for mid-flexion instability. Further in vivo studies are warranted to understand if this mid-flexion coronal laxity has negative clinical implications. Cite this article: Bone Joint J 2021;103-B(6 Supple A):87–93.
Is it safe to perform elective orthopaedic surgery with high community rates of COVID-19? An observational cohort study
Authors: Dickenson EJ , Jordan RW , Poole C , Shyamalan G , Arbuthnot J , Makrides P , Smith NA
Published: May 2021

Introduction

During the first wave of the COVID-19 pandemic, University Hospitals Birmingham NHS Foundation trust was able to recommence elective orthopaedic surgery using private hospitals procured by the NHS as COVID-19 free ‘green’ sites. We report on the safety of elective orthopaedic surgery with high rates of community transmission.

Methods

We conducted an observational cohort study on consecutive NHS patients attending three private hospitals between 4 May 2020 and 16 June 2020. Patients attended preoperative assessment, including coronavirus disease (COVID-19) symptom screening, were instructed to self-isolate for 14 days and had a negative COVID-19 swab within 72 hours of surgery. Patient age, American Society of Anesthesiologists (ASA) grade, body mass index, surgery performed, type of anaesthetic and length of stay were collected. Our primary outcome was a positive COVID-19 swab, secondary outcomes were COVID-19 symptoms, readmission, surgical complications and mortality.

Results

Between 4 May 2020 and 16 June 2020, 191 patients were admitted to three private hospitals for elective surgery; 121 (67%) patients underwent general or regional anaesthetic, 179 patients were ASA grades 1 or 2 (94%) and 12 (6%) were ASA 3. In total, 187 (98%) patients were successfully contacted at 30 days postoperative and no COVID-19 symptoms, positive COVID-19 swabs or mortality or were recorded. One patient was readmitted following a pulmonary embolism and two patients were treated as outpatients for a deep vein thrombosis and a superficial infection.

Conclusion

With ‘green pathways’ elective orthopaedic surgery can safely be performed while rates of COVID-19 in the community are high.
Segmentation of specialised and non-specialised work as a model for dealing with rising demand for paediatric surgical services
Authors: Davidson JR , Yardley IE
Published: May 2021

Introduction

Shifts in the landscape of surgical care provision have resulted in a rise in demand for specialist paediatric surgery services. Here we describe a model of a single paediatric surgery service delivering elective surgery across two sites, a specialist children’s hospital and an inner-city district general hospital. This model has allowed for a management of increased demand while maintaining key quality indicators within national standards.

Materials and methods

In a single specialist paediatric surgical service working at two sites (specialist and non-specialist), service demand was evaluated by number of referrals and waiting list additions and removals over an eight-year period (2011–2018). Daycase rate, 30-day readmission, and 12-month reoperation for three commonly performed general surgery of childhood procedures (umbilical hernia repair, Inguinal herniotomy, orchidopexy) are reported. NHS Getting it Right First Time data are used to allow comparison with national standards.

Results

Referrals to the service increased 2.5-fold (955 in 2011/12 compared with 2,419 in 2017/18) and waiting list additions increased 1.4-fold (585 compared with 840), net additions to the waiting list indicate that demand was met. Readmission and reoperation rates met or exceeded national standards.

Discussion

This model allows for a high quality of care to be provided with acceptable daycase rates and low readmission and reoperation rates. We commend this model to other specialist paediatric surgical centres experiencing increasing demand on their services
Spondyloepiphyseal Dysplasia Tarda with Progressive Arthropathy Associated with Early-onset Hip Arthritis – A Case Report
Authors: Prabaharan C , Harshavardhan J K Giriraj , Menon P Gopinath
Published: May 2021

Introduction: Spondyloepiphyseal dysplasia tarda with progressive arthropathy (SEDT-PA) is a rare inherited dysfunction with autosomal recessive inheritance. SEDT-PA is also named as progressive pseudorheumatoid arthropathy of childhood as it is associated with multiple joint contractures and arthritis. We report a case of SEDT-PA managed with bilateral stage total hip arthroplasty.
Case Report: A 22-year-old lady presented with severe bilateral hip arthritis. Based on her clinical and radiological features described in this article, she was diagnosed as having SEDT-PA. She was managed with bilateral stage total hip arthroplasty. The pre-operative planning and technical challenges of performing this procedure have been described.
Conclusion: Dysfunctions originally of genetic origin like spondyloepiphyseal dysplasia tarda mimics and is commonly misdiagnosed as juvenile chronic arthritis. These patients have disabling early-onset hip arthritis which requires surgery. Arthroplasty is challenging in these patients because of the low proximal femur offset but good results can be obtained after thorough pre-operative planning to tackle intraoperative difficulties.
Keywords: Spondyloepiphyseal dysplasia, Early-onset hip osteoarthritis, Bilateral total hip arthroplasty.
CVNet: confidence voting convolutional neural network for camera spectral sensitivity estimation
Authors: He Tianyue , Zhang Qican , Zhou Mingwei , Shen Junfei
Published: May 2021

Spectral sensitivity, as one of the most important parameters of a digital camera, is playing a key role in many computer vision applications. In this paper, a confidence voting convolutional neural network (CVNet) is proposed to rebuild the spectral sensitivity function, modeled as the sum of weighted basis functions. By evaluating useful information supplied by different image segments, disparate confidence is calculated to automatically learn basis functions’ weights, only using one image captured by the object camera. Three types of basis functions are made up and employed in the network, including Fourier basis function (FBF), singular value decomposition basis function (SVDBF), and radial basis function (RBF). Results show that the accuracy of the proposed method with FBF, SVDBF, and RBF is 97.92%, 98.69%, and 99.01%, respectively. We provide theory for network design, build a dataset, demonstrate training process, and present experimental results with high precision. Without bulky benchtop setups and strict experimental limitations, this proposed simple and effective method could be an alternative in the future for spectral sensitivity function estimation.
Experimental investigation of binodal astigmatism in nodal aberration theory (NAT) with a Cassegrain telescope system
Authors: Karcı Özgür , Arpa Eray , Ekinci Mustafa , Rolland Jannick P.
Published: May 2021

We present simulations and an experimental investigation of binodal astigmatism in nodal aberration theory (NAT) for a customized, high-precision Cassegrain telescope system. The telescope system utilizes a five-axis, piezo-actuated flexural mechanism to introduce secondary mirror misalignments and generate aberrations intentionally. The induced aberrations are measured interferometrically and quantified for a grid of field points on the telescope system's image plane. For this purpose, a coma-free pivot point of the secondary mirror was simulated for isolating the binodal astigmatism field response. The separation of the nodes is proportional to the introduced misalignments. A simulation of Fringe Zernike coma and binodal astigmatism was generated using a real ray trace model of the optical system and analyzed to compare to the experimental results. A statistical analysis of the measurements was performed to show the experimental results’ accuracy and stability. The experimental results were consistent with the simulations, hence experimentally validating NAT for binodal astigmatism for the first time.
X-ray source translation based computed tomography (STCT)
Authors: Yu Haijun , Li Lei , Tan Chuandong , Liu Fenglin , Zhou Rifeng
Published: May 2021

Micro computed tomography (µCT) allows the noninvasive visualization and 3D reconstruction of internal structures of objects with high resolution. However, the current commercial µCT system relatively rotates the source-detector or objects to collect projections, referred as RCT in this paper, and has difficulties in imaging large objects with high resolutions because fabrication of large-area, inexpensive flat-panel detectors remains a challenge. In this paper, we proposed a source translation based CT (STCT) for imaging large objects with high resolution to get rid of the limitation of the detector size, where the field of view is primarily determined by the source translation distance. To compensate for the deficiency of incomplete data in STCT, we introduced multi-scanning STCT (mSTCT), from which the projections theoretically meet the conditions required for accurate reconstructions. Theoretical and numerical studies showed that mSTCT has the ability to accurately image large objects without any visible artifacts. Numerical simulations also indicated that mSTCT has a potential capability to precisely image the region of interest (ROI) inside objects, which remains a challenge in RCT due to truncated projections. In addition, an experimental platform for mSTCT has been established, from which the 2D and 3D reconstructed results demonstrated its feasibility for µCT applications. Moreover, STCT also has a great potential for security inspection and product screening by using two perpendicular STCTs, with advantages of low-cost equipment and high-speed examination.
Single-shot spatiotemporal characterization of a multi-PW laser using a multispectral wavefront sensing method
Authors: Kim Yeong Gyu , Kim Ji In , Yoon Jin Woo , Sung Jae Hee , Lee Seong Ku , Nam Change Hee
Published: May 2021

The single-shot spatiotemporal characterization of an ultrahigh intensity laser pulse was performed using a multispectral wavefront sensor. For the measurement of the spatio-spectral electric field, a femtosecond laser pulse was spectrally modulated and separated by a Fabry-Perot etalon coupled with a grating pair, and its spatio-spectral electric field was measured with a wavefront sensor. The spatiotemporal electric field was reconstructed from the measured spatio-spectral electric field of a multi-PW laser pulse. We found that the spatiotemporal distortion could reduce the focused laser intensity by 15%, compared to the case of a diffraction-limited and transform-limited laser pulse.
Polarization independent and non-reciprocal absorption in multi-layer anisotropic black phosphorus metamaterials
Authors: He Zhihui , Lu Hua , Zhao Jianlin
Published: May 2021

The polarization independent and non-reciprocal absorption is particularly crucial for the realization of non-reciprocal absorption devices. Herein, we proposed and studied the absorption response of two- and three-layer anisotropic black phosphorus (BP) metamaterials by using the finite-difference time-domain (FDTD) simulation and radiation oscillator theory (ROT) analysis. It is shown that, due to unequal surface plasmon resonant modes excited in zigzag (ZZ) and armchair (AC) directions of the anisotropic BP layer, tunable polarization independent and dependent absorption can be achieved for the proposed multi-layer anisotropic BP metamaterials with AC-AC, AC-ZZ, ZZ-AC, AC-AC-φ, AC-ZZ-φ, and ZZ-AC-φ configurations. Especially, the polarization independent absorption also can be realized for odd-layer BP nanostructures. Unlike previous reports, polarization independence only can be achieved in the even-layer BP nanostructure. Moreover, tunable non-reciprocal absorption with the extremely large non-reciprocal degree (NRD) is also found in the case of AC-ZZ and ZZ-AC configurations and AC-ZZ-φ and ZZ-AC-φ configurations. These results may open up the possibility of realizing tunable polarization independent and non-reciprocal plasmonic devices based on 2D materials.
High-efficiency, high-power mid-infrared quantum cascade lasers [Invited]: erratum
Authors: Botez Dan , Kirch Jeremy D. , Boyle Colin , Oresick Kevin M. , Sigler Chris , Kim Honghyuk , Knipfer Benjamin B. , Ryu Jae Ha , Lindberg Don , Earles Tom , Mawst Luke J. , Flores Yuri V.
Published: May 2021

Errors have been found in subsection 3.2 (i.e., in page 1384) of our paper [Opt. Mater. Express 8, 1378 (2018) 10.1364/OME.8.001378] as far as the identification of the grown layers within one period, for the quantum cascade laser structure shown in Figure 1(a). The correct text is as follows.
Comparación de los patrones espaciales e incidencia de la segregación residencial en las principales ciudades de Colombia
Authors: Mayorga Hernao José Mario
Published: May 2021

El artículo tiene como objetivo principal describir los patrones geográficos y la incidencia de la segregación residencial en Bogotá, Cali y Medellín en los años 2005 y 2018. A partir de una reflexión conceptual y metodológica sobre la importancia de hacer estudios comparativos en tiempo y contexto, se hace un planteamiento para medir la segregación residencial en las tres principales ciudades de Colombia en dos años diferentes y a diversas escalas para poder comparar cómo ha sido la incidencia de la segregación residencial y los cambios espaciales que ha presentado. Para ello se usan múltiples métodos de análisis espacial y estadístico que permiten la construcción de índices a dos escalas que llevan a la conclusión que la segregación presenta particularidades en sus patrones geográficos en las tres ciudades estudiadas. Entre las particularidades se encuentra que la segregación ha disminuido a escala macro, se presenta con mayor incidencia a una escala barrial y que hay una baja probabilidad de interacción entre los grupos de calidad de vida baja y calidad de vida alta.
I want to export but where to? A proposed method for selecting international markets
Authors: Mayer Beatrice , Martini Pâmela , Roecker Rejane
Published: May 2021

Objective of the study: to develop a method for the selection of international markets, in order to answer: how to select the most appropriate foreign market to the company's needs? Methodology / approach: This is a technological article whose intervention was to establish a target market in Africa that presented the greatest potential for attractiveness and accessibility. The ranking method was applied, preceded by a cut line (by clustering) of countries without the minimum requirements and the most attractive and accessible market was established through the decision matrix tool. Main results: The market selection started by defining the African continent and 49 countries were clustered, excluding unattractive ones, resulting in: South Africa, Angola, Algeria, Egypt and Morocco. Subsequently, ranking was applied and Angola was the target market selected for export. Theoretical / methodological contributions: Contributes methodologically using a blend of methods, clustering and ranking, which allows you to select the target market according to objective criteria. Relevance / originality: In view of the existing international market selection models, this method proposal is positioned as an improvement, as it brings two differentials, clustering as the cut line, and the decision matrix as a tool for ranking countries. Managerial contributions: The business contribution is to have a simple and accessible method, which takes into account the specificities of attractiveness and accessibility for a specific product, so that the selection of international markets is based on objective and not merely intuitive criteria, thus increasing the assertiveness in choosing the target market.
Aplicação de Novas Tecnologias na Gestão de Estoques / Application of New Technologies in Inventory Management
Authors: Sousa Josiano Cesar de , Silva Isaac Lima e , Medeiros Yara Maria Dias , Rodrigues Luciana Da Luz
Published: May 2021

O gerenciamento de estoque é um dos processos mais importantes na gestão de uma empresa que busca a excelência na exploração de sua atividade e busca, a cada dia, melhorar a eficiência de seus processos para que assim o seu gerenciamento possa se manter a empresa competitiva no mercado. O presente artigo foi elaborado com o objetivo de analisar como as dificuldades atuais dos modelos de gestão de estoque podem ser sanadas com a utilização de novas tecnologia. Para sua realização, dados foram coletados através de análise qualitativa de caráter bibliográfico. Os resultados permitiram constatar que novas tecnologias, como a inteligência artificial, contribuem para a geração de um diferencial competitivo no mercado, e as empresas devem utilizar as mais variadas ferramentas para que a gestão dos seus estoques gere vantagem competitiva em relação aos concorrentes do mesmo segmento.
Comportamento do Consumidor na Economia Digital: Uma Revisão da Literatura / Consumer Behavior in the Digital Economy: A Literature Review
Authors: Silva Neto José Amâncio da
Published: May 2021

O atual cenário mundial apresenta um mundo em que se vive o mutável, cheio de transformações, graças ao advento das tecnologias. Essas mudanças são aspectos constantes, no aspecto econômico, por isso, empresas e clientes precisam estar perfeitamente informados a respeito de forças e variáveis como a globalização, a competitividade, o desenvolvimento tecnológico, as influências e as informações, que têm grande poder no ambiente econômico, para justificar as atividades de consumo da população. Assim, a pesquisa busca identificar e avaliar o comportamento do consumidor frente a economia digital, através um estudo bibliográfico, buscando compreender as variáveis que interferem no processo de escolha dos consumidores, bem como quais ferramentas utilizar para influenciar nesse processo de escolha.
Concepções Metodológicas da Educação Física Inclusiva / Methodological Conceptions of Inclusive Physical Education
Authors: Lopes Edinildo Nunes , Miguel Joelson Rodrigues
Published: May 2021

Resumo: É cientificamente comprovada a importância das práticas de atividades físicas e seus inúmeros benefícios. Ela é fundamental para o aumento da qualidade de vida, visto que reduz os riscos de desenvolvimento de doenças e ajuda a manter o corpo saudável. A presente pesquisa discute as concepções metodológicas da educação física inclusiva. Parte do princípio de que todo sujeito é dotado de conhecimento e por isso precisa ser considerado com indivíduo de potencialidades e com expertises constituintes do seu fazer vivido.  Estamos num momento de mudanças e de um repensar as possibilidades das pessoas com deficiência, extraindo-as de uma ótica de segregação e exclusão, passando a uma visão de maior possibilidade, livre de preconceitos. Concluiu-se que as estratégias pedagógicas inclusivas, devem buscar atividades de aprendizagens nas quais todos possam participar da proposta, com respeito às peculiaridades de cada aluno. Investigações sobre a identificação de novas práticas pedagógicas inclusivas, bem como metodologias que possam ajudar nesse processo, é uma grande contribuição, tanto para as comunidades escolares mais específicas, quanto para a sociedade de uma maneira geral.
Estratégias na Implantação do Sistema Eletrônico de Informações / Strategies in the Implementation of the Electronic Information System
Authors: Silva Teófilo Barbosa da , Carvalho Rafael Rodrigues , Ceolin Alessandra Carla
Published: May 2021

Este artigo teve como objetivo realizar uma análise das estratégias adotadas pelo poder executivo do Estado de Pernambuco a partir do processo de implantação do Sistema Eletrônico de Informações (SEI) em diferentes órgãos e entidades. Trata-se de um estudo de caso e para obtenção dos dados utilizou-se da técnica de entrevista semiestruturada, realizando duas entrevistas presenciais e individuais, gravadas em áudio e posteriormente transcritas para a análise. Os resultados indicam que a estratégia de implantação do SEI por entidade foi fator determinante para o sucesso do projeto. Também contribuíram para o êxito do projeto a utilização do conhecimento e mão-de-obra dos próprios servidores bem como o uso destes na função de multiplicadores para treinar a maior quantidade possível de usuários. A despeito da implantação do SEI ter sido considerada bem-sucedida pelos entrevistados, um ponto elencado por eles que precisa ser melhorado é o apoio da alta administração. A principal resistência esteve na questão cultural, devido a mudança de sair do papel para o processo eletrônico.
Interferência da Menopausa na Osseointegração: Uma Revisão Bibliográfica / Menopause Interference with Osseointegration: A Bibliographic Review
Authors: Muniz Beatriz Novaes , Amorim Adriana Vanderlei
Published: May 2021

Resumo: Os implantes dentários têm sido uma opção cada vez mais comum para a substituição de dentes perdidos, sendo os níveis de sucesso relativamente elevados. O déficit de estrogênio pode provocar alterações que conduzem à perda óssea, fragilidade e aumento do risco de fratura. Logo, estas alterações no metabolismo ósseo podem afetar o tecido ósseo circundante aos implantes dentários osteointegrados resultando na falência dos mesmos. Portanto, este trabalho tem como objetivo realizar uma revisão bibliográfica para investigar a interferência da menopausa na osseointegração. Este é um estudo de revisão bibliográfica, dessa maneira foram utilizadas as bases de dados eletrônicas, SciELO, PubMed e Google acadêmico usando as palavras-chave em Português e Inglês selecionados de acordo com a classificação de Descritores em Ciências da Saúde (DeCS / Ciências da Saúde Descritores): “menopausa” / “osseointegração” em Português e “menopause” / “osseointegration” em Inglês. Como critério de inclusão foram selecionados os artigos originais e revisões de literatura publicados nos últimos 10 anos. De acordo com a revisão bibliográfica foi possível observar que a interferência da menopausa na osseointegração é devido a deficiência de estrogênio é a causa mais conhecida, pois esse hormônio regula a homeostasia óssea e a cessação de produção de estrogénio induz uma remodelação desequilibrada com reabsorção excessiva do osso devida à sobrevivência prolongada dos osteoclastos, levando à fragilidade óssea e aumento do risco de fratura, sendo que em casos de implantes a deficiência de estrogénio pode afetar a cicatrização levando a uma osteointegração debilitada. Conclui-se que não existem dados que indiquem a contraindicação definitiva dos implantes dentários osteointegrados nestas pacientes. Contudo, uma vez que a menopausa afeta a qualidade e quantidade do osso edêntulo assim como o processo de \osteointegração, este risco relativo deve ser tido em consideração no tratamento com implantes em mulheres pós-menopausa.
Impacto Ambiental e Gerenciamento de Resíduos Sólidos Advindos da Construção Civil no Brasil: Uma Revisão de Literatura / Environmental Impact and Solid Waste Management Arising from Civil Construction in Brazil: A Literature Review
Authors: Gomes Carla Pinheiro , Leite Guilherme Urquisa , Sena Rafael Wandson Rocha , Andrade Elysson Marcks Gonçalves de
Published: May 2021

Resumo: A construção civil é um setor que utiliza uma boa parte dos recursos naturais disponíveis, como, por exemplo, os produtos de extração mineral. Em contrapartida, está atrelada aos elevados índices de impactos ambientais negativos, como pela produção desenfreada de Resíduos de Construção Civil (RCCs). Estes resíduos, quando não possuem uma destinação adequada, podem trazer consequências permanentes para o meio ambiente, sendo necessário investigar a qualidade e abrangência dos serviços de gestão e de gerenciamento de resíduos sólidos gerados nas obras civis. Logo, este estudo tem por objetivo realizar uma revisão bibliográfica da literatura quanto o impacto ambiental e o gerenciamento de resíduos sólidos gerados na construção civil. Trata-se de uma revisão integrativa da literatura, de abordagem qualitativa, com procedimento técnico de pesquisa bibliográfica sobre impacto ambiental e gerenciamento de resíduos sólidos na construção civil. Foram aplicadas na base de dados da Scientific Eletronic Library Online (SCIELO) as palavras-chave “Construção civil” AND “Impacto ambiental” OR “Reciclagem de resíduos” OR “recursos ambientais”, para identificar todos os artigos publicados no eixo temático proposto, publicados entre 2011 e 2021, em inglês ou português. Dentre os tipos de resíduos gerados pelas atividades da construção civil, os mais desperdiçados, segundo alguns autores, são gesso e argamassa. Também são referenciados materiais cerâmicos, argamassa, bem como seus componentes, compreendendo assim 90% dos resíduos que são gerados em obras. Contudo, mediante a produção excessiva destes materiais, é recorrente a identificação de que a demanda foi superior à necessidade, implicando, assim em descarte dos resíduos, gerando, ainda, prejuízo financeiro. Quanto ao gerenciamento de resíduos sólidos na construção civil, foi possível identificar que este setor é um dos que mais geram resíduos sólidos, evidenciando uma urgência de adoção de medidas que possam mitigar os impactos negativos provenientes da produção de materiais que são descartados no meio ambiente.
Comparación de parámetros metabólicos en pacientes adultos y ancianos sometidos a cirugía bariátrica: Una cohorte prospectiva
Authors: Di Fermo Gomez Fernando Agustin , Castillo Maria Gabriela , Bosio Lucila Carla , Santamaria Jimena , Sforza Noelia , Meo Guzman Natalia , Errasti Ana Gabriela , Gimenez Cristina , Hansen Martin , Faingold Maria Cristina , Musso Carla
Published: May 2021

Introducción: El Objetivo fue evaluar los parámetros metabólicos en pacientes adultos ≥ 65 años en comparación con adultos < 65 años sometidos a CB pre y post intervención.Materiales y métodos: Estudio analítico de cohorte prospectiva en 40 pacientes sometidos a CB durante el periodo julio de 2015 y marzo de 2018. Los pacientes fueron divididos en dos grupos (A: ≥65 años; B: < 65 años) y se evaluaron previo a la cirugía (basal), y a los 3 y 6 meses posteriores al acto quirúrgico parámetros antropométricos y parámetros bioquímicos. Se calculó el porcentaje de peso perdido (PEPP) y se evaluó el índice Triglicéridos/HDLc (TAG/HDLc) como marcador de insulinorresistencia.Resultados: De los 40 pacientes sometidos a la CB, se incluyeron 36: 21 pacientes eran del grupo A (mediana de edad: 59, RIQ: 48-61 años) y 15 pacientes del grupo B (mediana de edad: 67, RIQ: 66-69 años), el porcentaje de pacientes con diabetes mellitus tipo 2 era de 53%(n=8) en B vs 43% (n=9) en A. Luego de 3 y 6 meses post CB se observó en el grupo B un descenso en el peso, índice de masa corporal y porcentaje de exceso de peso perdido (PEPP) no significativo, disminución en los niveles de glucemia y HbA1c sumado a un aumento significativo en los niveles de HDLc, además de un descenso significativo del índice TAG/HDLc en el grupo B. Se encontró una correlación positiva entre los niveles de HbA1c y PEPP, HDLc y el índice TAG/HDLc así como el descenso del uso de antidiabéticos e hipolipemiantes en el grupo B. Conclusiones: la CB logró similares resultados antropométricos en el grupo de pacientes ≥ de 65 años presentando una mejoría significativa en los paramétricos metabólicos a los 3 y 6 meses, principalmente en la insulinorresistencia, lo cual apoyaría el beneficio de la CB en este grupo etario.
Conocimientos, actitudes y prácticas de alimentación saludable e índice de masa corporal en adolescentes peruanos: Un estudio transversal
Authors: Rivas Pajuelo Soledad , Saintila Jacksaint , Rodríguez Vásquez Mery , Calizaya-Milla Yaquelin E. , Javier-Aliaga David J.
Published: May 2021

Introducción: El sobrepeso y la obesidad constituyen una de las principales preocupaciones sanitarias en los adolescentes. Tener los conocimientos suficientes, representa una opción para disminuir los riesgos. El objetivo del estudio fue evaluar la correlación entre conocimientos, actitudes y prácticas e índice de masa corporal (IMC) en adolescentes peruanos.Material y métodos: Se realizó un estudio no experimental de tipo transversal en 242 adolescentes de edades comprendidas entre 11 a 18 años. Para determinar los conocimientos, actitudes y prácticas sobre alimentación saludable, se desarrolló un cuestionario según los criterios propuestos por la Organización de las Naciones Unidas para la Agricultura y Alimentación (FAO, por sus siglas en inglés). Además, se calculó el índice de masa corporal para la edad (IMC/Edad) de acuerdo con las recomendaciones de la Organización Mundial de Salud (OMS). El análisis de los datos se hizo mediante el software estadístico IBM SPSS versión 24. Resultados:La proporción de mujeres que demostraron conocimientos altos, actitudes favorables y prácticas adecuadas, fue superior en relación con los varones (76,5 % vs. 75,0%), (75,5% vs. 70,7%) y 72,5% vs. 67,9%, respectivamente. Sin embargo, no hubo diferencias significativas (p>0,05). La proporción de varones que presentaron sobrepeso y obesidad fue 25,7% y 12,1%, respectivamente. Finalmente, se encontró correlación positiva estadísticamente significativa entre el IMC/Edad con los conocimiento, actitudes y prácticas acerca de alimentación saludable en los adolescentes (ρ=0,137; p=0,033), (ρ=0,160; p=0,013) y (ρ=0,133; p=0,039), respectivamente.Conclusiones: Los hallazgos sugieren que los adolescentes, especialmente los varones, deben ser el foco de programas de intervención nutricional integrados, con el propósito de disminuir la prevalencia de sobrepeso y obesidad.
Learning from error episodes in dialogue-videos: The influence of prior knowledge
Authors: Ding Lu , Cooper Katelyn , Stephens Michelle , Chi Michelene , Brownell Sara
Published: May 2021

In laboratory study environments, dialogue-videos, or videos of a tutor and a tutee solving problems together, have been shown to more effectively improve student learning than monologue-videos, or videos of tutors solving problems alone. Yet, few studies have replicated these findings in the context of authentic university classrooms. Here, we investigate the impact of dialogue-videos, and more specifically the effect of errors made by tutees in dialogue-videos, on student learning in the context of an undergraduate biology course. To understand why, we investigated students’ effort spent on watching videos, perceived influence of dialogue-videos, and worksheet completion rates. We found that higher-performing students perceived that they used the dialogue-videos to review content. We also found that higher-performing, but not lower-performing, students learned better from dialogue videos where tutees made errors. We also discuss the complexities of replicating laboratory studies in the classroom and implications of our findings.

Implications for practice or policy:

Tutee errors can be intentionally included in dialogue-videos to promote student learning.

When students lack the necessary prior knowledge, monologue-videos may be more effective in presenting the course content.

When using dialogue-videos, instructors can encourage students to collaborate to resolve any confusion in time to maximise the benefit of dialogue-videos in teaching and learning.
Optimising Poisson bridge constructions for variance reduction methods
Authors: Beentjes Casper H. L.
Published: May 2021

In this paper we discuss different Monte Carlo (MC) approaches to generate unit-rate Poisson processes and provide an analysis of Poisson bridge constructions, which form the discrete analogue of the well-known Brownian bridge construction for a Wiener process. One of the main advantages of these Poisson bridge constructions is that they, like the Brownian bridge, can be effectively combined with variance reduction techniques. In particular, we show here, in practice and proof, how we can achieve orders of magnitude efficiency improvement over standard MC approaches when generating unit-rate Poisson processes via a synthesis of antithetic sampling and Poisson bridge constructions. At the same time we provide practical guidance as to how to implement and tune Poisson bridge methods to achieve, in a mean sense, (near) optimal performance.
The crystal structure of 4,5-diiodo-1,3-dimesityl-1H-1,2,3-triazol-3-ium hexafluoridoantimonate(V), C20H22F6I2N3Sb
Authors: Xu Xingyu , Qiu Ping
Published: May 2021

C20H22F6I2N3Sb, triclinic,

P

1
‾

$P\bar{1}$

(no. 2), a = 10.2268(10) Å, b = 10.8850(9) Å, c = 12.1413(10) Å, α =  101.810(2)°, β = 90.465(3)°, γ = 103.194(3)°, V = 1285.9(2) Å3, Z = 2, R

gt
(F) = 0.0291, wR

ref
(F
2) = 0.0717, T = 200 K.
The frontiers of functionalized graphene-based nanocomposites as chemical sensors
Authors: Nurazzi Norizan M. , Abdullah Norli , Demon Siti Z. N. , Halim Norhana A. , Azmi Ahmad F. M. , Knight Victor F. , Mohamad Imran S.
Published: May 2021

Graphene is a single-atom-thick sheet of sp2 hybridized carbon atoms that are packed in a hexagonal honeycomb crystalline structure. This promising structure has endowed graphene with advantages in electrical, thermal, and mechanical properties such as room-temperature quantum Hall effect, long-range ballistic transport with around 10 times higher electron mobility than in Si and thermal conductivity in the order of 5,000 W/mK, and high electron mobility at room temperature (250,000 cm2/V s). Another promising characteristic of graphene is large surface area (2,630 m2/g) which has emerged so far with its utilization as novel electronic devices especially for ultrasensitive chemical sensor and reinforcement for the structural component applications. The application of graphene is challenged by concerns of synthesis techniques, and the modifications involved to improve the usability of graphene have attracted extensive attention. Therefore, in this review, the research progress conducted in the previous decades with graphene and its derivatives for chemical detection and the novelty in performance enhancement of the chemical sensor towards the specific gases and their mechanism have been reviewed. The challenges faced by the current graphene-based sensors along with some of the probable solutions and their future improvements are also being included.
Effect of in situ graphene-doped nano-CeO2 on microstructure and electrical contact properties of Cu30Cr10W contacts
Authors: Liang Shengli , Liu Shuang , Zhang Yi , Zhou Meng , Tian Baohong , Geng Yongfeng , Liu Yong , Jia Yanlin , Li Xu , Volinsky Alex A.
Published: May 2021

The graphene oxide (GO)-doped nano-CeO2 was introduced into Cu30Cr10W electrical contact composites by ball milling dispersion, freeze-drying, and spark plasma sintering, resulting in excellent mechanical strength and high arc erosion resistance. The effects of GO and CeO2 on the microstructure and properties of the composites were investigated. The arc erosion behavior was investigated by the JF04C electrical contact testing apparatus. Consequently, the uniform distribution of CeO2 nanoparticles hinders the movement of dislocations, GO transformed into reduced graphene oxide (rGO) during high-temperature sintering, and the in situ formation of Cr3C2 between trace carbon atoms and chromium particles at the C–Cu interface, which enhanced the interface combination. Compared with Cu30Cr10W composites, the tensile strength of the two composites was increased by 47 and 36% by importing GO and nano-CeO2, respectively. Finally, electrode material migrated from the cathode to the anode, and the rGO delayed the formation of pits and sharp bumps on the contact surface of the electrode and inhibited diffusion of molten metal; when compared with Cu30Cr10W, the GO/CeO2–Cu30Cr10W composites have better welding force.
Az utolsó császár Magyarországon – Hailé Szelasszié 1964-es látogatása
Authors: Marsai Viktor
Published: May 2021

The visit of the Ethiopian emperor Haile Selassie on 20-23 September 1964 was one of the most important events of the Hungarian foreign relations that time. This article aims to examine the circumstances of the meeting and its effects on the Ethio-Hungarian relations. The main statement of the paper is that although the visit did not bring a breakthrough in the collaboration, it helped to strengthen and fill with content the fresh connection between the parties, and it also determined the main frameworks of cooperation for the next two and half decades. Furthermore, the negotiations bred important practical experiences for the Hungarian administration, which knowledge helped not only in the relations with the developing world, but also in the wider international arena.
DETECCIÓN RÁPIDA DE ROTAVIRUS Y CORONAVIRUS EN CRÍAS DE ALPACA (Vicugna pacos) CON DIARREA EN LA REGIÓN DEL CUSCO, PERÚ
Authors: López P. Wellington , Chamorro L. Marycris , Garmendia B. Antonio E.
Published: May 2021

La diarrea es una de las causas más importantes de mortalidad en crías de alpacas, por lo que la definición de patógenos asociados a la diarrea de crías cobra una importancia especial para formular medidas de control efectivas. Muestras de heces colectadas de crías con diarrea aguda y contenidos intestinales de crías muertas fueron examinadas por presencia de antígenos de rotavirus o coronavirus mediante pruebas inmunocromatográficas rápidas. Tres de 14 muestras de heces de alpaca fueron positivas a rotavirus mientras que los contenidos intestinales fueron negativos. Cinco de 14 muestras de heces resultaron positivas a coronavirus mientras que ningún contenido intestinal fue positivo. Estos resultados sugieren que rotavirus y coronavirus están asociados con una proporción de casos de diarrea en crías de alpacas pero no descartan la posibilidad de co-infección con otros patógenos. La prevalencia de estos virus y el impacto causado requieren investigación adicional.
ПЕРШІ ДАНІ ЩОДО БІОЛОГІЧНИХ ОСОБЛИВОСТЕЙ AGRILUS PLANIPENNIS FAIRMAIRE, 1888 (COLEOPTERA: BUPRESTIDAE) НА ТЕРИТОРІЇ УКРАЇНИ
Authors: Kucheryavenko T. V. , Skrylnik Yu. Ye. , Davydenko K. V. , Zinchenko O. V. , Meshkova V. L.
Published: May 2021

Ясенова смарагдова вузькотіла златка (ЯСВЗ) проникла на територію України не пізніше 2018 р. і на кінець вегетаційного сезону 2020 р. поширилася у чотирьох районах Луганської області. Надає перевагу ясену зеленому, але іноді заселяє також ясен звичайний. Визначені максимальні значення довжини (35 см) та ширини (4,7 мм) личинкових ходів, глибина розміщення личинок у деревині під час зимівлі (15 мм) та лялечкової камери (5,7 мм), розміри лялечкових камер (8×2,8–16×4 мм) і льотних отворів (2,4×2–3,6×2,1 мм). Відпад личинок ЯСВЗ (3,4–5,2 % виявлених ходів) спричиняють переважно птахи. Із заселених гілок виведено паразитоїда, за попередніми даними, це — Spathius sp. (Braconidae). Передлялечки ЯСВЗ успішно завершують розвиток у відрізках гілок із відносною вологістю деревини понад 30 %. Експериментально доведено залежність темпів зниження відносної вологості лубу від її початкового рівня та від діаметра гілок. Підтверджено розшарування популяцій ЯСЗВ на когорти за сезонним розвитком. У травні–червні зростала частка личинок старших віків і передлялечок, у липні–серпні — частка личинок молодших віків, у жовтні–березні когорти представлені майже однаково.
Who determines the final version? The roles of translators, language revisers and editors in the publishing of a literary translation
Authors: Zlatnar Moe Marija , Južnič Tamara Mikolič , Žigon Tanja
Published: May 2021

The article explores the interaction among three key figures in the process of publication of a literary translation into a language of low diffusion: the translator, the editor and the language reviser (the latter specific to the Slovene situation). The aim of the research is to identify who has the strongest position of power in the decision-making process of the production of a literary translation, especially when conflict arises. Information was gathered from the three groups with questionnaires, interviews and an analysis of public statements. The questions focused on the selection of the translator and language reviser, the translation process, the revision process and conflict resolution. A cross-comparison of the results indicates that despite the automatic central position of the editors, they tend to yield their decision-making power to translators, while language revisers have a more subservient, consulting role.