bluuebunny/crossref_metadata_2025 huggingface dataset:
Geochemical Numerical Simulation of Low Salinity Waterflooding in Sandstone Reservoirs
Authors: Elagab Oubai Mishal Abdelrasool
Published: March 2022

In this paper, the underlying mechanisms behind the low salinity waterflooding were investigated. It has been ascertained that wettability alteration towards more water-wet is the leading cause to enhance oil recovery and observe the low salinity effect (LSE). The double-layer expansion mechanism has been considered the most probable reason for the wettability alteration due to low salinity waterflooding. Therefore, mechanistic modeling of low salinity waterflooding was approached by developing a diffuse layer surface complexation-based model that accounts for the double-layer expansion phenomena. The model was developed using the geochemical reaction path code PHREEQC, wherein the speciation and surface charge development at the oil-brine and kaolinite-brine interfaces were determined. Consequently, both the electrostatic pair linkages and the electrostatic forces were calculated, which led to predicting the qualitative change in the rock wetness owing to the low salinity effect. Wettability alteration owing to low salinity water flooding was predicted as a function of the oil composition, pH environment, ionic strength, divalent ions of the injected brine, and the concentration of the divalent cations in the formation water. The wettability change was qualitatively estimated using three approaches: bond product sum, zeta potential, and stability number.Overall, the high levels of pH in the system and the high acid content in the oil composition proved to have a beneficial impact in observing the low salinity effect and thus wettability alteration towards more water-wet. In contrast, increasing the ionic strength and the divalent cation concentrations at both formation water and injected brine suppressed the low salinity effect. Also, the abundance of Ca+2 in the formation water was more pronounced than Mg+2 to suppress the LSE. The results also showed that the bond product sum approach could not predict the wettability alteration owing to low salinity waterflooding when the pH level is higher than five.
Filamentous Crystal Growth In Organic Liquids And Selection Of Crystal Morphology
Authors: Yashima Takumi , Tani Marie , Kurita Rei
Published: March 2022

Filamentous crystals such as whisker crystals are often seen not only in metallic liquids, but also in organic liquids and solutions. They are interested as reinforce materials. However, it remains challenging to induce filamentous crystals due to an incomplete understanding of the mechanisms behind their formation. In this paper, we investigate filamentous crystal growth in viscous organic liquids. It is found that filamentous crystals grow via an extraordinary dynamical path, where the molecules locally evaporate to bubbles and then redeposite to the tip of growing crystalline filaments. We also succeeded in controlling whether filamentous or faceted crystal growth is selected by inducing or suppressing the bubbles.
Cryoglobulinemia in Systemic Lupus Erythematosus: A Retrospective Study of 213 Patients
Authors: Roubertou Yoann , Sabine Mainbourg , Hot Arnaud , Fouque Denis , Confavreux Cyrille , Chapurlat Roland , Debarbieux Sebastien , Jullien Denis , Sève Pascal , Juillard Laurent , Kolopp-Sarda Marie-Nathalie , Lega Jean-Christophe
Published: March 2022

Objectives
The clinical value of cryoglobulinemia (CG) in systemic lupus erythematosus (SLE) is largely unknown. The aim of this retrospective study was to describe the characteristics of CG in SLE, its impact on SLE phenotype, and the features associated with cryoglobulinemic vasculitis (CryoVas) in SLE patients.
Methods
This retrospective study conducted in a French university hospital, reviewed the data from 213 SLE patients having been screened for CG between January, 2013 and December, 2017. SLE patients positive for CG were compared to SLE patients without CG. Patients were classified as CryoVas using the criteria of De Vita et al.
Results
Of the 213 SLE patients included (mean age 28 years, female sex 85%), 142 (66%) had at least one positive CG in their history, 67% of them having a persistent CG at follow-up. CG was type III in 114 (80%) cases and type II in 27 (19%) cases. The mean concentration of the cryoprecipitate was 40mg/L (range 0-228). Patients with CG had significantly more complement consumption for C3, C4, and CH50 and received more corticosteroids (p = 0.002) and rituximab (p = 0.02) during follow-up. Among patients with CG, 21 (15%) developed a CryoVas. These patients had a higher SLEDAI at SLE diagnosis than CG + patients without CryoVas (17 vs. 13.6, respectively, p = 0.03). The clinical involvement of patients with CryoVas was mainly cutaneous (purpura, ulcers, digital ischemia) and articular, without any death at follow-up. Severe manifestations of CG included glomerulonephritis in 1/21 (5%) patient and central nervous system involvement in 4/21 (19%) patients. A response to first line treatments was observed in 12/13 (92%) patients; but relapses were observed for 3 of them.
Conclusion
CG is frequent in SLE, but mostly asymptomatic. CryoVas features involve mostly joints, skin, and general symptoms. CryoVas in SLE appears to be a specific condition, with a low prevalence of neuropathy, membranoproliferative glomerulonephritis, and severe involvement.
Social inequality in Health: Non-Communicable Diseases in Bolivia, determinants, and current challenges at the Municipal
Authors: Eyzaguirre Soraya Roman , Olivera Pamela Córdova
Published: March 2022

Background: The social gradient of Non-Communicable Diseases (NCD) has been widely studied. However, little has been done to understand health inequality across populations within a country, such as between municipalities. We use Bolivian municipal data to analyze the social inequality in the incidence of NCDs and identify social determinants that contribute to this inequality.Methods: First, we estimate curves and concentration indices (CI) of NCDs incidence, measuring the municipal socioeconomic status by the index of Unsatisfied Basic Needs. We rank municipalities from the poorest to the least poor. Then, we decompose the CI into some of its main social determinants using Wagstaff decomposition analysis. The information related to the incidence of NCDs is from the National Health Management Information System (HMI). Incidence rates are standardized by municipal demographics and availability of health services to control for these confounders during the analysis. Socioeconomic data at the municipal level for 2018 comes from the National Institute of Statistics, Sustainable Development Solutions Network - Bolivia, and projections.Results: The CI for NCDs incidence is 0.20 (95% confidence interval: [0.06,0.34]), which shows that the population with NCDs concentrates in relatively less poor municipalities. Consistent with global patterns, hypertension and diabetes have the highest incidence and inequality. We separate the contribution of five social determinants to the inequality of hypertension and diabetes: (1) urbanization rate, (2) education, (3) indigenous people, (4) sanitation, and (5) the percentage of women with anemia. We find that the most relevant are the urbanization rate and education. The rate of urbanization contributes positively to inequality, while years of education contribute negatively. Conclusion: There is an unequal distribution of NCDs that disadvantages municipalities of higher socioeconomic status. One of the main determinants is the urbanization rate. These results are consistent with the hypothesis that, in developing countries, rapid and unplanned urbanization tends to change people’s way of life, potentially leading them to develop behavioral risk factors that contribute to the incidence of NCDs. Thus, policies on healthy urban environments and health education focused on municipalities with high incidence could help to curb the increase of NCDs in Bolivia.
Online symptoms screening and testing of Covid-19 through RT-LAMP saliva of students and asymptomatic employees in a public school in Brazil.
Authors: Costa Silvia Figueiredo , Manuli Erika Regina , Oliveira Beatriz Araujo , Leal Fábio Eudes , Souza Edgar Casado Barreta , Illi Ana Paula , de Paiva Ana Paula Barreto , Fachini Camila da Silva , Cano Beatriz Aparecida Munhoz , Barros Priscila de Lima , Capuani Ligia , Domingues Helves Humberto , Passos-Bueno Maria Rita dos Santos e , Sabino Ester Cerdeira
Published: March 2022

Objective
To evaluate a respiratory symptoms screening system and test asymptomatic individuals (high school students and employees) at a public school in Brazil.
Methods
SARS-CoV-2 reverse transcription loop-mediated isothermal amplification (RT-LAMP) of saliva samples was performed weekly.
Results
A total of 969 samples were tested (mean of 108 tests per week). No asymptomatic participants tested positive for COVID-19, and no cases of COVID-19 transmission occurred at school despite the high transmissibility of the Delta variant, the local predominant variant at the time of the study.
Conclusion
Implementation of an online system of respiratory symptom screening and testing of COVID-19 through saliva in asymptomatic individuals is a feasible, low-cost and practical option to be used, especially in low-income countries.
Electrochemical oxygen generator with 99.9% oxygen purity and high energy efficiency
Authors: Zhang Yu , Xie Ke , Zhou Fangyao , Wang Feiteng , Xu Qian , Hu Jun , Ding Honghe , Li Peng , Tan Yi , Li Deming , Zhu Junfa , Zhao Changming , Lin Sen , Wu Yuen
Published: March 2022

Under the growing crisis of coronavirus disease 2019 pandemic, the global medical system is facing the predicament of an acute shortage of medical-grade oxygen (O2, ≥ 99.5% purity). Herein, we manufactured an oxygen generation device relying on electrochemical technology. The performance of electrochemical oxygen generator (EOG) was remarkably improved to a practically applicable level, achieving long-term (>200 h), stable, and quick production (>1.5L/min) of high purity O2 (99.9%) under high energy efficiency (496 L/kW·h), viasimultaneous optimizations for intrinsic electrochemical reaction mechanism, electrocatalysts, and external cell structure. The EOG also presents powerful competitiveness in user experience, which finds expression in high portability (4.7 kg), nearly instant O2 production (<1 s), and a quiet working condition (<39 dB). The EOG shows great potential to substitute commercial pressure swing adsorption O2 generation devices, which may significantly impact the traditional oxygen production industry.
Neuromorphic Decoding of Spinal Motor Neuron Behaviour during Natural Hand Movements for a New Generation of Wearable Neural Interfaces
Authors: Tanzarella Simone , Iacono Massimiliano , Donati Elisa , Farina Dario , Bartolozzi Chiara
Published: March 2022

We propose a neuromorphic framework to process the activity of human spinal motor neurons for movement intention recognition. This framework is integrated in a non-invasive interface that decodes the activity of motor neurons innervating intrinsic and extrinsic hand muscles. One of the main limitations of current neural interfaces is that machine learning models cannot exploit the efficiency of the spike encoding operated by the nervous system. Spiking-based pattern recognition would detect the spatio-temporal sparse activity of a neuronal pool and lead to adaptive and compact implementations, eventually running locally in embedded systems. Emergent Spiking Neural Networks (SNN) have not yet been used for processing the activity of in-vivo human neurons. Here we developed a convolutional SNN to process a total of 467 spinal motor neurons whose activity was identified in 5 participants while executing 10 hand movements. The classification accuracy approached 0.95 ± 0.14 for both isometric and non-isometric contractions. These results show for the first time the potential of highly accurate motion intent detection by combining non-invasive neural interfaces and SNN.
Digitalisierungsbezogene Kompetenzen Dozierender in den Lehramtsstudiengängen der TU Dresden
Authors: Tolle Juliane , Liebold Mariane , Dallmann Christine , Odrig Verena , Schaarschmidt Nadine
Published: March 2022

Mediatisierungsprozesse, die stetig voranschreiten, werden Lehrpersonen immer wieder vor neue medienpädagogische und -didaktische Herausforderungen stellen. Deshalb sollten medienpädagogische und -didaktische Inhalte in die Lehramtsausbildung integriert werden, um Medienbildung umfassend zu fördern und angehende Lehrkräfte entsprechend auf den Schulalltag vorzubereiten. Zentral ist dabei der Kompetenzerwerb von Studierenden in der Hochschullehre, der angehenden Lehrpersonen zukünftig ermöglichen soll, die Medienbildung ihrer Schülerinnen und Schüler zu fördern. Gleichzeitig müssen Hochschullehrende selbst über diese Medienbildung einschliesslich digitalisierungsbezogener Kompetenzen verfügen. Der folgende Beitrag befasst sich mit diesem Zusammenhang am Beispiel der Technischen Universität Dresden. Hier soll das Forschungsprojekt «DiKoLA – Digitalisierungsbezogene Kompetenzen von Hochschuldozent:innen in den Lehramtsstudiengängen» vorgestellt werden. Auf Grundlage vorangegangener Projekte der Professur für Medienpädagogik und der Professur für Bildungstechnologie an der TU Dresden zum Thema Medienbildung im Lehramt wurde ein Kompetenzrahmen entwickelt, welcher digitalisierungsbezogene Kompetenzen von Hochschullehrenden in Lehramtsstudiengängen adressiert. Weiterhin wurde die Lehrpraxis von Hochschuldozierenden hinsichtlich medienpädagogischer und mediendidaktischer Themen untersucht. Im Anschluss daran wurden Weiterbildungsangebote in Bezug auf den Kompetenzrahmen analysiert. Das Projekt sowie wesentliche Ergebnisse sollen im Rahmen des Beitrags vorgestellt werden. Die Befragung von Lehrenden an der TU Dresden im Rahmen des Projekts DiKoLA (Laufzeit: 01.07.2019 bis 31.12.2020) erfolgte in Kooperation der genannten Professuren mit der Professur für Didaktik der Informatik der TU Dresden.
Antioxidant Properties of Croton zehntneri Pax et Hoffm. Essential Oil and Its Inclusion Complex with β-Cyclodextrin Prepared by Spray Drying
Authors: Sousa Antônio , Oliveira George , Fonseca Lorenna , Rocha Marcio , Rai Mahendra , Santos Francisco , de Lima Sidney
Published: March 2022

Croton zehntneri Pax et Hoffm. is a plant from Northeastern Brazil, whose main component of its essential oil is estragole. Its thermal instability and low aqueous solubility prevent its technological application. This study aimed to prepare and characterize the Croton zehntneri essential oil (CZEO) complexed with β-cyclodextrin (β-CD), and to evaluate antioxidant activity of free and complexed-CZEO in vitro systems by the elimination of 2,2-diphenyl-1-picrylhydrazyl radicals (DPPH•), 2,2’-azinobis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS•+), hydroxyl and nitric oxide, as well as their ability to transfer electrons by the reducing potential. The infrared spectroscopy and thermal techniques demonstrated the formation of the inclusion complex (Est/β-CD) obtained by spray drying method. The free CZEO and its Est/β-CD at 0.9, 1.8, 3.6, 7.2, 14.4 and 28.8 μg mL–1 showed the ability to remove DPPH• (EC50 (half maximal effective concentration) 26.06 and 9.46 μg mL–1, respectively) and ABTS•+ (EC50 22.73 and 4.47 μg mL–1, respectively), nitric oxide inhibition (EC50 17.65 and 2.68 μg mL–1, respectively), hydroxyl radical sequestration (EC50 23.42 and 2.34 μg mL–1, respectively) and reducing potential (EC50 46.48 and 12.47 μg mL–1, respectively). The formation of the inclusion complex significantly increases its antioxidant potential.
Öğretmen Motivasyonunda Hizmetkâr Liderliğin Yordayıcı Rolü
Authors: BEŞTAŞ MARAKÇI Dilan , BOZ Abdulvehap
Published: March 2022

Bu çalışmanın amacı okul yöneticilerinin hizmetkâr liderlik davranışları ile öğretmenlerin motivasyon düzeyleri arasındaki ilişkiyi saptamaktır. Araştırma ilişkisel tarama modelinde betimsel bir çalışmadır. Çalışma grubu Siirt il merkezindeki ilkokullarda görev yapan 350 öğretmenden oluşmaktadır. Veri toplama aracı olarak iki farklı ölçek kullanılmıştır. Araştırma kapsamında elde edilen veri analizinde SPSS 22. 0 paket programı kullanılmıştır. Verilerin analizi için Pearson Momentler Çarpımı Korelasyon Katsayısı hesaplanmış ve ayrıca çoklu doğrusal regressyon analizi yapılmıştır. Araştırma kapsamında toplanan verilerin analizinden elde edilen sonuçlar değerlendirildiğinde, okul yöneticilerinin hizmetkâr liderlik davranışları ile öğretmenlerin motivasyon düzeyleri arasında pozitif yönde yüksek bir ilişki olduğunu ortaya görülmektedir. Regresyon analiz sonuçları okul yöneticilerinin hizmetkâr liderlik davranışlarının öğretmen motivasyonunu anlamlı düzeyde yordadığını göstermektedir.
Análise epidemiológica do perfil das colecistectomias realizadas no Brasil nos últimos 10 anos
Authors: De Souza Coutinho Laís , Baylão Penna Mariana , Martins de Oliveira Maia Lucineide
Published: March 2022

A colecistectomia é uma das intervenções mais realizadas no Brasil, pela alta prevalência de patologias benignas da vesícula. Objetivou-se analisar o recente panorama epidemiológico das técnicas operatórias de Colecistectomia Convencional versus Videolaparoscópica realizadas no Sistema público de saúde no Brasil. Realizou-se uma coleta observacional, descritiva e transversal dos dados sobre Colecistectomia Convencional e Videolaparoscópica, disponíveis no Sistema de Informações Hospitalares do SUS englobando o período entre janeiro de 2010 a dezembro de 2020. O contingente total de colecistectomias realizadas nesse período foi 2.057.184, concentrando-se principalmente na Região Sudeste. Dessas, 679.880 foram por via videolaparoscópica e 1.377.304 por via laparotômica, A taxa de mortalidade foi de 0,13 pela via laparoscópica, enquanto a laparotômica obteve 0,53. Em relação aos custos hospitalares, a colecistectomia vídeolaparoscópica representou apenas 34% do gasto total em colecistectomias realizadas por hospitais do Sistema Único de Saúde (SUS) com média de permanência hospitalar de 2,7 dias. Em suma, a colecistectomia por via laparotômica ainda representa a maioria desse tipo de procedimento no país, embora a via laparoscópica apresentou menor taxa de mortalidade, media de permanência e custos hospitalares.
Mieloma múltiplo: o subdiagnóstico em indivíduos idosos com queixas osteomusculares
Authors: Rusth Costa Pacheco Carolina , Freitas Lopes Vanessa , Alves dos Santos Priscila , Cezario Costa Reis Bruno
Published: March 2022

O mieloma múltiplo (MM) é uma discrasia plasmocitária configurando-se como o segundo câncer hematológico mais prevalente na população mundial e com maior incidência nos indivíduos acima de 50 anos de idade. Com base na revisão bibliográfica de periódicos e coleta de dados oficiais obtidos pela Secretaria de Vigilância em Saúde (SVS), esse artigo objetiva estabelecer a importância de incluir o MM nos diagnósticos diferenciais de um quadro clínico em que a sintomatologia principal – de comprometimento ósseo –  se permeia entre outras patologias benignas cuja incidência também se eleva com o passar da idade, como a osteoporose e a osteoartrite. A presença das células mielomatosas no organismo humano promovem uma série de desordens metabólicas, funcionais e incapacitantes com perda da homeostasia caso o diagnóstico precoce não for realizado. Dessa forma, é imprescindível que haja o incentivo para que os profissionais de saúde implementem o MM em seu raciocínio fisiopatológico no atendimento a pacientes idosos com quadro de anemia e queixa osteomuscular de modo a garantir a sobrevida com qualidade de vida do indivíduo a partir do momento de seu diagnóstico.
Do paradigma físico, às lutas e campo simbólico na Ciência da Informação
Authors: Oliveira Alessandra Nunes de , Castro Jetur Lima de
Published: March 2022

Considerando as concepções epistemológicas do paradigma físico da CI, constituindo-o como o dominante na gênese da CI, baseando-se nas relações das Ciências Empírico-Analíticas sistematizadas em regras técnicas do conhecimento empírico e constituindo os demais paradigmas cognitivo e social, o paradigma físico da CI é problematizado produzindo simbolicamente obstáculos epistemológicos ao conceito de informação no campo científico, como é discutido por Bourdieu (1989), Capurro (2003) e Gonzalez de Gomez (2000). Além disso, destaca-se a concepção central no texto de Gonzalez de Gomez (2000) de que a informação é flutuante e produz diferentes efeitos de sentido em diferentes contextos, a “informação”. Portanto, trata-se de um estudo teórico, de abordagem crítica e interpretativa sobre o paradigma físico na CI, cujo desenvolvimento pautou-se na autorreflexão, pois é nesse arcabouço metodológico que se estabelece o significado da validade desta categoria de afirmações críticas, colocando o paradigma físico a uma compreensão de interesse emancipatório pelo conhecimento e contrapondo as relações discursivas aos poderes hipostasiado. Por isso, precisa-se de uma reconstrução propriamente pautada na compreensão teórica e, sobre isso, González de Gomez (2000) destaca a informação como um termo flutuante que pode estar inserido em áreas e contextos diferentes. Isso faz com que ocorra uma disputa interna no próprio campo da CI com os paradigmas. Com os estudos culturais em informação, no entanto, pode-se afirmar que, em comparação com os teóricos que defendem a abordagem física no campo da CI, há uma constituição de estudos, cruzado no "status" ou "poder". Ainda é tímido o lugar de influência dos demais paradigmas se comparado ao reconhecimento do paradigma físico. Torna-se necessário entender e realizar essas fissuras, buscando uma reconstrução epistemológica nesse paradigma.
Pós-modernidade, complexidade e suas nuances na ciência da informação
Authors: Sousa Antonio Gouveia de , Costa Tâmela , Penha Noemi Andreza da , Silva Michel Batista da , Castro Jetur Lima de , Valentim Marta Lígia Pomim
Published: March 2022

Os registros históricos humanos sofreram transformações à medida em que evoluíam as tecnologias. Quanto maior a evolução tecnológica, mais informações puderam ser disseminadas. O objetivo desta pesquisa é discutir as possíveis similaridades entre a Ciência da Informação e as nuances pós-modernas. Como procedimentos metodológicos apresenta uma pesquisa de natureza qualitativa e exploratória baseada em uma revisão bibliográfica. O estudo possibilitou a confirmação dos elementos relacionais para uma compreensão dialógica entre a pós-modernidade, a complexidade e a Ciência da Informação. O pensamento pós-moderno questiona paradigmas consolidados na Ciência Moderna, contrapondo-se às ideias e práticas inerentes ao pensamento científico baseado no paradigma dominante, mais especificamente nos preceitos provenientes do racionalismo científico, da visão reducionista e da discrepante realidade de grupos sociais.
Vertebral Artery Interventions: A Comprehensive Updated Review
Authors: Bob-Manuel Tamunoinemi , Maitas Oscar , Price Justin , Noor Abdullah , Obi Koyenum , Okoh Nelson , Garikapati Kiran , Kim Jeong , Jahan Sanjida , Jenkins James S.
Published: March 2022

Patients with posterior circulation ischemia due to vertebral artery stenosis account for
20 to 25% of ischemic strokes and have an increased risk of recurrent stroke. In patients treated
with medical therapy alone, the risk of recurrence is particularly increased in the first few weeks
after symptoms occur, with an annual stroke rate of 10 to 15%. Additionally, obstructive disease of
the vertebrobasilar system carries a worse prognosis, with a 30% mortality at 2-years if managed
medically without additional surgical or endovascular intervention.
Percutaneous transluminal angioplasty and stenting of symptomatic vertebral artery stenosis are
promising options widely used in clinical practice with good technical results; however, the improved
clinical outcome has been examined in various clinical trials without a sufficient sample
size to conclusively determine whether stenting is better than medical therapy. Surgical revascularization
is an alternative approach for the treatment of symptomatic vertebral artery stenosis that
carries a 10-20% mortality rate.
Despite the advances in medical therapy and endovascular and surgical options, symptomatic vertebral
artery stenosis continues to impose a high risk of stroke recurrence with associated high
morbidity and mortality. This review aims to provide a focused update on the percutaneous treatment
of vertebral artery stenosis, its appropriate diagnostic approach, and advances in medical
therapies.
Concrescent Teeth: Extraction Implications - A Case Report
Authors: Woźniak Łukasz , Łukaszuk Kamila , Antonowicz Bożena , Szarmach Janusz , Borys Jan
Published: March 2022

Background:

Concrescent teeth belong to the group of double teeth with disturbed anatomy of shape and structure. The concrescence consists of the aggregation of root cementum of adjacent teeth. This anomaly usually concerns the upper teeth in the lateral part of the jaw. Concrescent teeth can be treated conservatively, endodontically, orthodontically and surgically.

Objective:

The aim of this article is to present the case of the concrescence of upper teeth, a second molar tooth with an impacted third molar, and to draw the attention of clinicians to this rare anomaly that may cause medical and legal problems.

Case presentation:

This article presents the case of a 53-year-old woman who reported to the dentist’s office to extract tooth 17 due to chronic periodontitis and an impacted and abnormally placed tooth 18.

Result:

During the extraction, concrescence of the teeth was noted. The teeth were removed, and the alveoli were surgically treated. The postoperative period was uncomplicated.

Conclusion:

In this paper, the authors draw the attention of clinicians to the fact that the occurrence of concrescent teeth in clinical practice is rare and that it is difficult to diagnose this anomaly on the basis of routine radiological diagnostics based on 2D images. They also point to the necessity of a thorough physical examination and a thorough assessment of teeth before extraction, the extension of imaging diagnostics by conical CT scan in justified cases, and informing the patient about possible complications. In order to avoid serious complications, the extraction of the concrescent teeth should be performed by an experienced specialist in dental or maxillofacial surgery.
Ice Coverage of the Laptev Sea and Air Temperature Variation during
Recent Centuries: Observed Data and Reconstructions Using a Geochemical
Proxy
Authors: Astakhov Anatolii S. , Aksentov Kirill I. , Babich Valeriy V. , Darin Andrey V. , Kalugin Ivan A. , Melgunov Mikhail M. , Hu Limin , Shi Xuefa , Sattarova Valentina V.
Published: March 2022

Objective:

The aim was to reconstruct the climatic parameters and ice of the Laptev Sea over the last centuries and to identify the causes of their variability.
Background: The ice-free water area of the Arctic Ocean has increased considerably during the summer–autumn period in recent decades, which may be attributed to several climatic and oceanographic factors.

Methods:

The ice-free period duration and mean annual surface air temperature were reconstructed using the transfer function technique to compare hydrometeorological data and the chemical composition of bottom sediments accumulated during the observation period. This approach was based on sub-millimeter scanning of sediments using synchrotron radiation X-ray fluorescence.
The results revealed a specific feature of the variations in the mean annual air temperature over the last 400 years in the Laptev Sea region, whereby higher (up to positive) temperature anomalies, were observed during the Little Ice Age. Some discrepancies in the ice coverage and climate fluctuations were observed during the period from the end of the Little Ice Age to the beginning of the period of accelerated ice-cover degradation in the Arctic (1850–1980). These discrepancies can be caused by the beginning of global warming, which have disturbed the natural cyclicality of atmospheric processes, whereas natural variations in ice coverage were more stable.

Conclusion:

A joint analysis of the reconstructed variations in air temperature and the duration of the ice-free period revealed the influence of atmospheric processes on the ice conditions of the Laptev Sea.
Attitude and Orbit Control of a Space Robot at Additional Launching and
Approaching a Geostationary Satellite
Authors: Somov Yevgeny , Butyrin Sergey , Somov Sergey
Published: March 2022

Background:

The problems of putting a space robot into a geostationary orbit using a
combined scheme and its approach to a geostationary satellite are considered. The authors’ previous
results on this topic are briefly analyzed.

Objective:

The paper deals with three problems: further development of a rational strategy for the
robot’s add-launching on geostationary orbit and its approaching target using a plasma electric propulsion
unit only; synthesis of the guidance and control laws; a nonlinear dynamical analysis of the
robot’s attitude and orbit control system during these modes.

Methods:

The developed methods and algorithms are based on the local optimizing the fuel consumption
of the plasma electric propulsion unit during each inter-orbital flight of a space robot.

Results:

Simulation results on the guidance and control algorithms are presented that demonstrate
their effectiveness.

Conclusion:

The breakthroughs are as follows: original strategy of add-launching and forecasting
the influence of gravitational disturbances as well as solar pressure forces when synthesizing a robot’s
guidance law for its inter-orbital flights.
Crystal Engineering and its Chemistry: An Architectural Approach for
Cocrystallization
Authors: Dhibar Manami , Chakraborty Santanu , Pani Ayan
Published: March 2022

Background:

In the field of crystal engineering, cocrystallization is a unique technique
by the help of which physicochemical properties like melting point, solubility, dissolution, etc of
the APIs can be modified without changing the intrinsic structure of APIs.

Objective:

Crystal packing of a solid is modified by crystal engineering techniques which involve
modification of intermolecular interactions that help to regulate breaking and creation of noncovalent
bonds. Non-covalent interactions such as hydrogen bonding, van der Waals forces, π-π
stacking are primarily responsible for the formation of cocrystals. Cocrystals are solid crystalline
materials consisting of two or more molecules present in the similar crystal lattice. It is a method
of formation of mainly hydrogen bonds between the drug molecule and coformer. This technique
can be applied to almost all APIs which have low aqueous solubility. There are several active
pharmaceutical ingredients available, which have therapeutic efficacy against several lifethreatening
diseases. Among those APIs, which have poor aqueous solubility and low oral bioavailability
(BCS class II and class IViv), cannot be efficiently developed into a suitable dosage
form.

Conclusion:

Therefore, this survey gives a united record of the reasoning for plan of cocrystals,
past endeavors, later improvements and future viewpoints for cocrystallization research which
will be incredibly helpful for the formulation scientists of the pharmaceutical industry.
Statistical Methods for Item Reduction in a Representative Lifestyle Questionnaire: Pilot Questionnaire Study
Authors: Staffini Alessio , Fujita Kento , Svensson Akiko Kishi , Chung Ung-Il , Svensson Thomas
Published: March 2022

Background

Reducing the number of items in a questionnaire while maintaining relevant information is important as it is associated with advantages such as higher respondent engagement and reduced response error. However, in health care, after the original design, an a posteriori check of the included items in a questionnaire is often overlooked or considered to be of minor importance. When conducted, this is often based on a single selected method. We argue that before finalizing any lifestyle questionnaire, a posteriori validation should always be conducted using multiple approaches to ensure the robustness of the results.

Objective

The objectives of this study are to compare the results of two statistical methods for item reduction (variance inflation factor [VIF] and factor analysis [FA]) in a lifestyle questionnaire constructed by combining items from different sources and analyze the different results obtained from the 2 methods and the conclusions that can be made about the original items.

Methods

Data were collected from 79 participants (heterogeneous in age and sex) with a high risk of metabolic syndrome working in a financial company based in Tokyo. The lifestyle questionnaire was constructed by combining items (asked with daily, weekly, and monthly frequency) from multiple validated questionnaires and other selected questions. Item reduction was conducted using VIF and exploratory FA. Adequacy tests were used to check the data distribution and sampling adequacy.

Results

Among the daily and weekly questions, both VIF and FA identified redundancies in sleep-related items. Among the monthly questions, both approaches identified redundancies in stress-related items. However, the number of items suggested for reduction often differed: VIF suggested larger reductions than FA for daily questions but fewer reductions for weekly questions. Adequacy tests always confirmed that the structural detection was adequate for the considered items.

Conclusions

As expected, our analyses showed that VIF and FA produced both similar and different findings, suggesting that questionnaire designers should consider using multiple methods for item reduction. Our findings using both methods indicate that many questions, especially those related to sleep, are redundant, indicating that the considered lifestyle questionnaire can be shortened.
Retracted: Association of QT interval indices with cardiac autonomic neuropathy in diabetic patients
Authors: Kumar Sanjay , Kodidala Satyanath Reddy , Jayachandra Srinivasa
Published: March 2022

Background. Cardiovascular autonomic neuropathy (CAN) is a severely debilitating yet underdiagnosed condition in patients with diabetes mellitus. The prevalence can range from 2.5% (based on the primary prevention cohort in the Diabetes Control and Complications Trial) to as high as 90% of diabetic patients. Clinical manifestations range from orthostasis to myocardial infarction. The diagnosis is made using multiple autonomic function tests to assess both sympathetic and parasympathetic function. This study was conducted to assess the relationship between Cardiac autonomic neuropathy and QT interval. Material and methods. This was a cross-sectional study conducted in 100 patients attending a tertiary care hospital in India. Deep breathing test, Valsalva ratio, immediate heart rate response to standing 30 : 15, BP rise with sustained hand grip and postural hypotension were evaluated. Scoring was done for cardiac autonomic neuropathy. QT interval and QTc interval were determined and association with CAN was obtained. Results. Out of 100 type 2 diabetic patients, 60% were males and 40% were females. 25 patients having no cardiac autonomic neuropathy and had no prolonged QTc interval. While, 75 patients had QTc prolonged were associated with early and severe CAN cardiac autonomic neuropathy. The prolonged QTc was significantly associated with CAN in diabetic patients when compared without CAN and controls (P < 0.0001). The grading score for CAD showed that 75% cases were having score > 2 were 25% of cases had score < 2. Out of 75 patients 44 were between score 2–4 and 31 were above score 4. A significant association between QTc and Diabetic CAN patients observed when compared non CAN and controls. Conclusions. Diabetic cardiac autonomic neuropathy is associated with increase in prolongation of QTc intervals. Hence, there is need for regular checkup of autonomic nervous system in diabetic patient to prevent further complications.
Effectiveness of vitex agnus castus extract in the treatment of primary dysmenorrhea
Authors: H.B. Semenyna , O.O. Korytko
Published: March 2022

Background. Primary dysmenorrhea (PD) is one of the most common types of gynecological pathology and is observed in 31–52% of young women, in 10% of them the pain is so intense that leads to disability. In the pathogenesis of PD consider a representative of eicosanoids— thromboxane A2 with a pronounced vasoconstrictor effect. The article presents the results of clinical and hormonal examination of women with PD and developed on this basis a method of treatment. The purpose was to develop and evaluate the effectiveness of treatment of PD, taking into account the multicomponent pathogenesis of the disease. Materials and methods. There were 60 women observation, randomly divided into two groups: 30 women with PD (main group) and 30healthy women (control group). PD was diagnosed on the basis of patients’ complaints of painful menstruation and related symptoms, excluding organic gynecological pathology and diseases of the internal organs in consultation with a physician and endocrinologist. Treatment of patients with PD was performed with a combined drug, which includes a standardized extract of Vitex agnus castus L., indole-3-carbinol, 3,3-diindolyl-methane, passionflower extract, California escholzia extract. Results. As a result of treatment in patients with PD significantly reduced the intensity of pain, and 60% completely disappeared pain, all disappeared fear of waiting for the next menstruation, significantly reduced the manifestations of autonomic vascular (from 17% of patients to 3%), autonomic (from 10% of patients to 0%), metabolic and endocrine (from 13% of patients to 0%) disorders and disorders of the emotional and mental sphere (from 23% of patients to 7%), no patient had a combination of symptoms. Conclusions. Given the safety, high therapeutic efficacy, the drug based on Vitex agnus castus extract can be recommended for the treatment of young patients with PD lasting at least 3 months.
Palafox Méndez, Ana Zarina, Jugando con la rima, técnicas lúdicas para el aprendizaje del verso improvisado en México, julio de 2015, FONCA, Instituto Queretano de la Cultura y las Artes, Museo Histórico de la Sierra Gorda. Presentación de Eduardo Langagn
Authors: Zarina Palafox Ana
Published: March 2022

Todas las personas pueden hacer verso improvisado. Desde la infancia hablamos improvisando, solo es cuestión de practicar para poner las mismas palabras en la poesía estructurada.El método "Jugando con la Rima" le permite a la gente soltarse a improvisar, y esto posibilita perfectamente el hacer poesía por escrito; por el contrario, cuando se dan talleres escritos de poesía, la gente no aprende a improvisar. Esa es la novedad. Esta forma de enseñar economiza el uso de las zonas cerebrales dejando espacio para la creatividad y la espontaneidad deseables en la improvisación. Dicho método, que ha surgido de la mano del taller presencial homónimo opera de manera inductiva-deductiva: primero hay una práctica de la improvisación y posteriormente un análisis de lo realizado.En este libro se funden varios conocimientos teóricos. Se toma, por ejemplo, de María Montessori y de L. Ronald Hubbard los métodos sinestésicos al combinar el oído con la vista y el tacto del material didáctico usado en el taller fichas, propiciando así una interiorización más sensorial y menos abstracta; de Freire se retoma el hecho de que el aprendizaje parte de nuestra necesidad de expresar lo que ya sabemos (método de alfabetización para adultos); de la psicología Gestalt, el “círculo mágico” que, además de horizontalidad, propicia complicidad y comunidad; de Huizinga, el hecho de generar lúdica y afectivamente un aprendizaje significativo.El método se plantea en dos niveles o capas: en un primer momento, en la capa consciente, se dan las herramientas de estructura para la improvisación, y después, en la capa subconsciente y confiando en que la forma misma del taller contiene elementos de los procesos de aprendizaje de la tradición, se apuesta a que el ser humano es, de suyo, poeta.El método está diseñado, además, para que las personas de todas edades puedan estar, aprender y convivir, como en el fandango, como en la familia, como ha sido en los tiempos más armoniosos de la raza humana.Dice Eduardo Langagne: "Ana Zarina Palafox Méndez, señoras y señores, propone una manera de atender a nuestro propio oído mexicano, con la variante fonética de cada región; una manera de ayudar a nuestra oreja sensible, que puede y debe seguir alimentando esta tradición maravillosa. Y sigamos las enseñanzas de quienes nos preceden. Más de una vez me ha tocado la fortuna de estar escuchando a Ana Zarina improvisar, lo mismo en una fiesta de cumpleaños, en un foro abierto, en un taller... Y mi profundo respeto a su profesionalismo lo significo ahora con los lectores de este libro que comparte a su vez su experiencia ordenada en el ejercicio para homenajear el verso improvisado".
Sujeto y reflexividad ¿En qué piensan los ancestros otomies?
Authors: Galinier Jacques
Published: March 2022

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Experiencias de trabajo de campo con énfasis en la Tierra Caliente de Michoacán
Authors: González Raúl Eduardo
Published: March 2022

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Jesús Tenorio Simón y Héctor Adolfo Quintanar Pérez. Exposición fotográfica Entre la magia y la tradición. México: Casa de Cultura de Coatepec, Veracruz, 2017.
Authors: Quintanar Pérez Héctor Adolfo
Published: March 2022

A partir del 14 de septiembre de 2017 y hasta el 14 de octubre, se llevó a cabo la exposición fotográfica Entre la Magia y la tradición en la Casa de Cultura de Coatepec, Veracruz. Esta exposición gira en torno a dos grandes festividades populares del municipio cafetalero: la fiesta en honor a san Jerónimo, celebrada el 29 de septiembre, y el Carnaval de Tuzamapan, localidad cañera del municipio.

Los autores, Jesús Tenorio Simón, encargado de documentar la festividad de culto popular católico en honor a San Jerónimo, y Héctor Adolfo Quintanar Pérez, fotógrafo del alegre y longevo carnaval cañero, exponen en más de cuarenta fotografías algunos detalles íntimos de dos fiestas populares que otorgan identidad al municipio Coatepecano.

La exposición está dividida en 3 partes. En la primera se expone el trabajo de Jesús Tenorio y las imágenes de la veneración y verbenas a san Jerónimo, en las que los habitantes locales fabrican largos arcos con postes de pino y flor de cucharilla que pasean por las calles de los límites de la ciudad hasta llegar a la parroquia principal y colocarlos en la fachada. Cabe mencionar que, como característica particular festiva de este acontecimiento, los habitantes lanzan agua desde los techos de las casas a los arqueros, empapando a todo aquel que forme parte del enorme convoy. A estos arcos los acompañan grupos de danza tradicional que engalanan con sus colores la tradición.

La segunda parte es el resultado de la documentación por más de 3 años del carnaval de Tuzamapan, Veracruz, hogar de un personaje carnavalesco al que los lugareños llaman Bonetero, por su elaborado sombrero adornado al que llaman bonete. Dicho personaje es caracterizado por los hombres adultos y viejos de la comunidad, quienes también portan una máscara de madera y un traje que asemeja al de la vieja imagen del hacendado local o al capataz del rancho: con sus botas de fuera, machete de madera y corbata elegante. Esta festividad muestra el pasado de esta comunidad, en el que su clímax económico se debió a la aportación de la hacienda cañera de los Gorozpe a principios del siglo XX. A finales de abril, los habitantes salen a las calles y edificios abandonados de la ex-hacienda y bailan con alegría durante más de cinco días de desfiles.

Por último, se muestra un trabajo en conjunto de ambos autores, resultado de su participación en el colectivo llamado Etnofotografía, donde en diez imágenes muestran escenas de danzas tradicionales y vida cotidiana de las comunidades rurales de la zona montañosa del centro de Veracruz. Cabe mencionar que esta última etapa de la galería ya ha sido expuesta en la ciudad de Dresde, Alemania. Este último trabajo en colectivo lo pueden admirar en su página de Facebook: Etnofotografía.
Fonoteca Nacional. Serie radiofónica Minotauro Sonoro. México: Radio Educación, 2012.
Authors: Vázquez Argüello Jonathan Pedro
Published: March 2022

La sonoridad de la cultura ha quedado registrada y da cuenta de nuestra manera de hablar y de pensar, es decir de nuestra manera de comunicarnos. En este caso, el registro es posible gracias a la Fonoteca Nacional, entre otras instituciones, que además de tener como objetivos la investigación, el registro y la conservación del patrimonio sonoro, tienen también dentro de sus tareas la difusión mediante el fomento de una cultura de la escucha y el estímulo a la creación y experimentación artística. Es así y gracias a ello como nace Minotauro Sonoro, una serie radiofónica de diez capítulos que van de los diez a los quince minutos de duración, generada por la Fonoteca Nacional en el marco de III Semana del Sonido en México que celebró esta institución en el año 2012. Esta producción, afortunadamente, quedó registrada para deleite de los radioescuchas en la página web de Radio Educación.

Es evidente el esfuerzo que hacen los productores de esta serie radiofónica para llevar a los oídos de sus escuchas la comprensión del universo de los sonidos, mediante la ilustración que logran gracias a los paisajes sonoros que tienen cierto protagonismo. Uno de los mayores aciertos, y que resulta bastante evidente, es que logran tejer la relación del sonido y la literatura y lo convierten en el pretexto perfecto para la elaboración de esta serie. Otros elementos que destacan son la grabación y análisis de fragmentos de diferentes obras de la literatura universal que se abordan, los cuales nos invitan a la lectura gracias a la curiosidad que este tipo de productos pueden despertar en nosotros. Es interesante que una producción sonora permita recrear imágenes de la literatura de una manera tan fiel gracias a la acertada elección y combinación de sonidos.

Entre las obras abordadas por esta serie están El corazón delator, de Edgar Allan Poe, que nos lleva a la habitación que el escritor crea y desde dónde aparece aquel corazón y su palpitar; el poema Ventanas abiertas, de Víctor Hugo, que a través del paisaje sonoro nos permite recrear la brisa del mar gracias al sonido de las olas y las gaviotas, abriendo las ventanas de nuestros oídos; la novela Pedro Páramo, de Juan Rulfo, con los murmullos y lamentos del pueblo de Comala que logramos escuchar en pequeños fragmentos de la obra —este mismo capítulo es atinadamente acompañado

por las reflexiones de Roland Barthes sobre los susurros. Así, Minotauro Sonoro logra conjugar sonidos y literatura y los convierte en una experiencia auditiva sin igual.
Chamanismo y montaje: las “noches del yagé”
Authors: Flores Enrique
Published: March 2022

La obra de Michael Taussig, y muy especialmente su libro Chamanismo, colonialismo y el hombre salvaje. Un estudio sobre el terror y la curación, ofrece una útil e interesante —y hasta insólita— aportación a los métodos de percepción, recopilación, interpretación y representación de la investigación etnológica y etnopoética. Su visión del chamanismo en el entramado colonial, su compleja y radical reflexión sobre el terror y la curación, su planteamiento del montaje como método alternativo y crítico de conocimiento en ruptura con los “rituales académicos”, su implícita incorporación de las técnicas dramatúrgicas de Antonin Artaud y Bertolt Brecht —a través de Walter Benjamin y su ensayo sobre el Trauerspiel alemán—, su análisis de la sesión chamánica a la luz de estas performances teatrales no puede sino representar una invitación a la apertura y experimentación en la escritura y transformación de los materiales. Esa es la finalidad de estos apuntes.