bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluating changes in the prevalence of female genital mutilation/cutting among 0-14 years old girls in Nigeria using data from multiple surveys: A novel Bayesian hierarchical spatio-temporal model
Authors: Nnanatu Chibuzor Christopher , Atilola Glory , Komba Paul , Mavatikua Lubanzadio , Moore Zhuzhi , Matanda Dennis , Obianwu Otibho , Kandala Ngianga-Bakwin
Published: February 2021

Female genital mutilation/cutting (FGM/C) is considered a public health and human rights concern, mainly concentrated in Africa, and has been targeted for elimination under the sustainable development goals. Interventions aimed at ending the practice often rely on data from household surveys which employ complex designs leading to outcomes that are not totally independent, thus requiring advanced statistical techniques. Combining data from multiple surveys within robust statistical framework holds promise to provide more precise estimates due to increased sample size, and accurately identify ‘hotspots’ and allow for assessment of changes over time. In this study, rich datasets from six (6) successive waves of the Nigeria Demographic and Health Surveys and Multiple Indicator Cluster Surveys undertaken between 2003 and 2016/17, were combined and analyzed in order to better assess changes in the likelihood and prevalence of FGM/C among 0-14-year old girls in Nigeria. We used Bayesian hierarchical regression models which explicitly accounted for the inherent spatial and temporal autocorrelations within the data while simultaneously adjusting for variations due to different survey methods and the effects of linear and non-linear covariates. Parameters were estimated using Markov chain Mote Carlo techniques and model fit assessments were based on Deviance Information Criterion. Results show that prevalence of FGM/C among 0–14 years old girls in Nigeria varied over time and across geographical locations and peaked in 2008 with a shift from South to North. A girl was more likely to be cut if her mother was cut, supported FGM/C continuation, or had no higher education. The effects of mother’s age, wealth and type of residence (urban-rural) were no longer significant in 2016. These results reflect the gains of interventions over the years, but also echo the belief that FGM/C is a social norm thus requiring tailored all-inclusive interventions for the total abandonment of FGM/C in Nigeria.
Shedding and transmission of a live attenuated influenza A virus vaccine in pre-weaned pigs under field conditions
Authors: Lopez Moreno Gustavo , Nirmala Jayaveeramuthu , Goodell Christa , Culhane Marie , Torremorell Montserrat
Published: February 2021

Influenza A virus (IAV) is one of the most important respiratory viruses affecting pig health and vaccination is the most common strategy to control influenza infections. In this field study we assessed the onset and duration of shedding of a live attenuated influenza virus (LAIV) vaccine, its ability to transmit to non-vaccinated pigs and whether the LAIV could be aerosolized and detected in the environment. Thirty-three litters (n = 33) of a farm using the LAIV vaccine were selected for the study, a subset of them (n = 12) were left unvaccinated and a subset of piglets (n = 3) in vaccinated litters were also left unvaccinated to serve as sentinels. Selected piglets from the litters were sampled multiple days post vaccination (DPV) by collecting nasal swabs and blood, and were tested using a LAIV vaccine specific RT-PCR assay and hemagglutination inhibition assay against the LAIV strains respectively. Environmental specimens consisting of air and surface wipes were also collected. One hundred percent (21/21) of the vaccinated litters tested LAIV positive 1 DPV and until 6 DPV. In contrast, only five (5/33) of the thirty-three non-vaccinated pigs tested positive during the course of the study. Viable LAIV was confirmed in vaccinated pigs by cell culture and whole genome sequencing. In addition, low levels of LAIV RNA (RT-PCR Ct values ranging between 33 and 38) were detected in all air specimens collected on the day of vaccination and until 6 DPV (3/10). Pigs had maternally derived antibodies reactive against the LAIV strains which may have influenced the degree of shedding observed. Under the conditions of this study, shedding of the LAIV from vaccinated pigs was limited in time, resulted in minimal transmission to non-vaccinated pigs and was detected in low levels in aerosols collected in the vaccinated rooms likely influenced by the presence of maternally derived antibodies against the LAIV strains.
Interactive effects of discharge reduction and fine sediments on stream biofilm metabolism
Authors: Pérez-Calpe Ana Victoria , Larrañaga Aitor , von Schiller Daniel , Elosegi Arturo
Published: February 2021

Discharge reduction, as caused by water diversion for hydropower, and fine sediments deposition, are prevalent stressors that may affect multiple ecosystem functions in streams. Periphytic biofilms play a key role in stream ecosystem functioning and are potentially affected by these stressors and their interaction. We experimentally assessed the interactive effects of discharge and fine sediments on biofilm metabolism in artificial indoor channels using a factorial split-plot design with two explanatory variables: water discharge (20, 39, 62, 141 and 174 cm3 s-1) and fine sediments (no sediment or 1100 mg L-1 of sediments). We incubated artificial tiles for 25 days in an unpolluted stream to allow biofilm colonization, and then placed them into the indoor channels for acclimation for 18 days. Subsequently, we manipulated water discharge and fine sediments and, after 17 days, we measured biofilm chlorophyll-a concentration and metabolism. Water velocity (range, 0.5 to 3.0 cm s-1) and sediment deposition (range, 6.1 to 16.6 mg cm-2) increased with discharge, the latter showing that the effect of increased inputs prevailed over sloughing. In the no-sediment treatments, discharge did not affect biofilm metabolism, but reduced chlorophyll-a. Sediments, probably as a consequence of nutrients released, promoted metabolism of biofilm and chlorophyll-a, which became independent of water discharge. Our results indicate that pulses of fine sediments can promote biofilm algal biomass and metabolism, but show interactive effects with discharge. Although discharge reduction can affect the abundance of basal resources for food webs, its complex interactions with fine sediments make it difficult to forecast the extent and direction of the changes.
A reservoir computing approach for forecasting and regenerating both dynamical and time-delay controlled financial system behavior
Authors: Budhiraja Rajat , Kumar Manish , Das Mrinal K. , Bafila Anil Singh , Singh Sanjeev
Published: February 2021

Significant research in reservoir computing over the past two decades has revived interest in recurrent neural networks. Owing to its ingrained capability of performing high-speed and low-cost computations this has become a panacea for multi-variate complex systems having non-linearity within their relationships. Modelling economic and financial trends has always been a challenging task owing to their volatile nature and no linear dependence on associated influencers. Prior studies aimed at effectively forecasting such financial systems, but, always left a visible room for optimization in terms of cost, speed and modelling complexities. Our work employs a reservoir computing approach complying to echo-state network principles, along with varying strengths of time-delayed feedback to model a complex financial system. The derived model is demonstrated to act robustly towards influence of trends and other fluctuating parameters by effectively forecasting long-term system behavior. Moreover, it also re-generates the financial system unknowns with a high degree of accuracy when only limited future data is available, thereby, becoming a reliable feeder for any long-term decision making or policy formulations.
Shared medical appointments: Translating research into practice for patients treated with ablation therapy for atrial fibrillation
Authors: Schmidt Monika M. , Griffin Joan M. , McCabe Pamela , Stuart-Mullen Lynette , Branda Megan , OByrne Thomas J. , Bowers Margaret , Trotter Kathryn , McLeod Christopher
Published: February 2021

Background

People with atrial fibrillation (AF) have lower reported quality of life and increased risk of heart attack, death, and stroke. Lifestyle modifications can improve arrhythmia-free survival/symptom severity. Shared medical appointments (SMAs) have been effective at targeting lifestyle change in other chronic diseases and may be beneficial for patients with AF.

Objective

To determine if perceived self-management and satisfaction with provider communication differed between patients who participated in SMAs compared to patients in standard care. Secondary objectives were to examine differences between groups for knowledge about AF, symptom severity, and healthcare utilization.

Methods

We conducted a retrospective analysis of data collected where patients were assigned to either standard care (n = 62) or a SMA (n = 59). Surveys were administered at pre-procedure, 3, and 6 months.

Results

Perceived self-management was not significantly different at baseline (p = 0.95) or 6 months (p = 0.21). Patients in SMAs reported more knowledge gain at baseline (p = 0.01), and higher goal setting at 6 months (p = 0.0045). Symptom severity for both groups followed similar trends.

Conclusion

Patients with AF who participated in SMAs had similar perceived self-management, patient satisfaction with provider communication, symptom severity, and healthcare utilization with their counterparts, but had a statistically significant improvement in knowledge about their disease.
Applicability of sentinel lymph node oriented treatment strategy for gallbladder cancer
Authors: Yasukawa Koya , Shimizu Akira , Motoyama Hiroaki , Kubota Koji , Notake Tsuyoshi , Sugenoya Shinsuke , Hosoda Kiyotaka , Hayashi Hikaru , Kobayashi Ryoichiro , Soejima Yuji
Published: February 2021

Background

Utility of the sentinel lymph node (SLN) biopsy in some malignancies has been reported, however, research on that of gallbladder cancer (GBC) is rare. The aim of this study is to investigate whether the concept of SLN is applicable to T2/3 GBC.

Methods

A total of 80 patients who underwent resection for gallbladder cancer were enrolled in this study. Patients with GBC were stratified into two groups based on the location of tumor, peritoneal-side (T2p or 3p) and hepatic-side (T2h or 3h) groups. We evaluated the relationship between cystic duct node (CDN) and downstream lymph node (LN) status. CDN was defined as a SLN in this study.

Results

Thirty-eight patients were classified into T2, including T2p (n = 18) and T2h (n = 20), and 42 patients into T3, including T3p (n = 22) andT3h (n = 20). The incidence of LN metastasis was significantly higher in hepatic-side than peritoneal-side in both T2 and T3 (P = 0.036 and 0.009, respectively). In T2, 14 T2p had negative CDN and downstream LN, however, three T2h had negative CDN and positive downstream LNs (defined as a skipped LN metastasis) (P = 0.043). In T3, patients with skipped LN metastasis were significantly higher in T3h (n = 11) than those in T3p (n = 2) (P<0.001). There was no recurrence of the local lymph node. Disease-free survival in the T2p and T3p were significantly better than those in the T2h and T3h (P = 0.005 and 0.025, respectively).

Conclusion

The concept of SLN can be applicable to T2p GBC, where the downstream LNs dissection can be omitted.
The PB1 protein of influenza A virus inhibits the innate immune response by targeting MAVS for NBR1-mediated selective autophagic degradation
Authors: Zeng Yan , Xu Shuai , Wei Yanli , Zhang Xuegang , Wang Qian , Jia Yane , Wang Wanbing , Han Lu , Chen Zhaoshan , Wang Zhengxiang , Zhang Bo , Chen Hualan , Lei Cao-Qi , Zhu Qiyun
Published: February 2021

Influenza A virus (IAV) has evolved various strategies to counteract the innate immune response using different viral proteins. However, the mechanism is not fully elucidated. In this study, we identified the PB1 protein of H7N9 virus as a new negative regulator of virus- or poly(I:C)-stimulated IFN induction and specifically interacted with and destabilized MAVS. A subsequent study revealed that PB1 promoted E3 ligase RNF5 to catalyze K27-linked polyubiquitination of MAVS at Lys362 and Lys461. Moreover, we found that PB1 preferentially associated with a selective autophagic receptor neighbor ofBRCA1(NBR1) that recognizes ubiquitinated MAVS and delivers it to autophagosomes for degradation. The degradation cascade mediated by PB1 facilitates H7N9 virus infection by blocking the RIG-I-MAVS-mediated innate signaling pathway. Taken together, these data uncover a negative regulatory mechanism involving the PB1-RNF5-MAVS-NBR1 axis and provide insights into an evasion strategy employed by influenza virus that involves selective autophagy and innate signaling pathways.
MARKETING STRATEGIC PLANNING: EVENT AS MARKETING STRATEGY IN A COMMERCIAL CENTER CASE STUDY
Authors: Sousa Isabel Cristina Almeida de , Lima Kléuvia Macedo Oliveira , Marques Renata Patrícia Müller , Castro Carla Simone , Junqueira Luiz Daniel Muniz
Published: February 2021

The overall objective of this study was to analyze the event as a marketing strategy in a commercial center. As specific objectives, we seek to understand events as a marketing strategy using case study and bibliography review to identify the communication and marketing tools organizers use and to find out the practical procedures used by organizers. People wonder in which ways marketing managers use events as a strategy to reach the public. This research has a qualitative, exploratory approach and the technique used was a case study, in which an interview was conducted with open semi-structured dissertative questions. The analysis provided the perception of the importance of events as an effective marketing tool, in which the consumer's emotional, sensory, and sentimental stimulus can influence the consumption practice.
Komparasi Efektifitas Media Aplikasi Secil: Belajar Bahasa Arab dengan Suara dengan Komik Strip dalam Penguasaan Mufradāt Siswa Kelas IV SD Muhammadiyah Banguntapan
Authors: Meizri Wahyuningsih  , Dudung Hamdun
Published: February 2021

The lack of media use during mufradāt learning in grade 4 SD Muhammadiyah Banguntapan was the background for researchers to try out the Secil application media: Learning Arabic + Voice and comic strips. This study aims to determine the effectiveness of learning mufradāt using the Secil application media and comic strip media, and whether or not there is a significant difference between the learning outcomes of the Secil application media user group and the comic strip media. This research is a quantitative study with a comparative research type. This research design used a quasi-experiment. Collecting data using observation, documentation, interviews, and tests. The data analysis technique used the Independent Sample t-Test and the Gain Score test through Microsoft Excel 2016. The results of this study concluded that mufradāt learning with the Secil application media was more effective than comic strip media. Evidenced by the comparison value of the n-gain of the two media is 1.78> 1, which means the effectiveness value of group 1> group 2. Then there is a significant difference between the learning outcomes of the two groups. Based on the results of the Independent Sample t-Test, which shows a significance value of 0.01 <0.05, which means that the application media of Secil: Learning Arabic + Voice is more effective than comic strips in improving mufradāt mastery of 4th-grade students of SD Muhammadiyah Banguntapan.

Abstrak: Kurangnya pemanfaatan media saat pembelajaran mufradāt di kelas 4 SD Muhammadiyah Banguntapan melatarbelakangi peneliti untuk mengujicobakan media aplikasi Secil: Belajar Bahasa Arab+Suara dan komik strip. Penelitian ini bertujuan untuk mengetahui efektifitas pembelajaran mufradāt dengan menggunakan media aplikasi Secil dan media komik strip, dan ada atau tidaknya perbedaan yang signifikan antara hasil belajar kelompok pengguna media aplikasi Secil dengan media komik strip. Penelitian ini merupakan penelitian kuantitatif dengan jenis penelitian komparatif. Desain penelitian ini menggunakan quasi experiment. Pengumpulan data menggunakan observasi, dokumentasi, wawancara dan test. Adapun teknik analisis data menggunakan uji Independent Sample t-Test dan Gain Score melalui Microsoft Excel 2016. Hasil dari penelitian ini memperoleh kesimpulan bahwa pembelajaran mufradāt dengan media aplikasi Secil lebih efektif daripada media komik strip. Dibuktikan dengan nilai perbandingan n-gain kedua media ialah 1,78 > 1, yang berarti nilai efektifitas kelompok 1 > kelompok 2. Kemudian terdapat perbedaan yang signifikan antara hasil belajar kedua kelompok. Didasarkan pada hasil uji Independent Sample t-Test yang menunjukkan nilai signifikansi 0,01 < 0,05, yang artinya media aplikasi Secil: Belajar Bahasa Arab+Suara lebih efektif daripada komik strip dalam meningkatkan penguasaan mufradāt siswa kelas 4 SD Muhammadiyah Banguntapan.
Isomorphic Mimicry and Social Inclusion: an Analysis of the Capability of Wonosobo District Government in Implementing the Inclusive Education Policy
Authors: Marsetyo Fernandito Dikky , Nurhadi Nurhadi
Published: February 2021

This article examines the implementation of the inclusive education policy to provide educational services for children with disabilities. Using a conceptual framework concerning disability and social inclusion, and isomorphic mimicry and capability, this article aims to explain Wonosobo District Government's capability in implementing inclusive education policy. This article is based on a qualitative study, using a case study approach with descriptive analysis. We argue that Wonosobo District Government's capability to implement inclusive education policy is in a weak or limited position (weak capability). This is a depiction of isomorphic mimicry, where the inclusive education policy in Wonosobo District seems to be functional. As its implication, children with disabilities are vulnerable to being excluded from obtaining inclusive education services.
La Pitié (1803) et La Conversation (1812) de Jacques Delille par rapport aux recherches sur la voix humaine et la parole
Authors: Bajer Michał
Published: February 2021

The studies of Jacques Delille’s work put an emphasis on the relations between a group of poetic texts (L’homme des champs, L’Imagination, Les Trois Règnes de la nature) and their scientific intertexts. The aim of this paper is to study the scientific connotations of lesser known poems, stressing the problem of the physiological and anatomical reflections on the human voice and the speech. Is there a relation between Delille’s observations on the voice (La Pitié, p. 40, 151-152 ; La Conversation, p. 141-142, 146-147) and the terminology used by physicians or philosophers of his time? What is the impact of Rousseau’s Essai sur l’origine des langues on Delille? Is it inspiring to use the medical distinction between the physiology and the pathology to understand Delilles’s conception of the human voice?
Science, nomenclature et représentation. L’expérience et l’expérimentation dans La Joie de vivre d’Émile Zola
Authors: Rachwalska von Rejchwald Jolanta
Published: February 2021

The article presents a strict interpenetration of scientific discourse and literary fiction on the example of Zolaʼs La Joie de vivre. The coexistence of these discourses is part of the poetics of ambiguity, which is characteristic of the weave of literature and science, where Science opposes Doubt. The purpose of the article is to reflect on the relationship between Experience (everyday life) and Experience (scientific). This conceptual opposition is embodied in a pair of main characters: Pauline and Lazare, equipped with a different attitude to reality and science. She learns human physiology by experiencing changes in her maturing body, which appears to her as a complex, but full of secrets, beautiful machinery. He lives by fearing the body and seeing it as the source of death. He wants to defeat death by coming up with experimental designs that are supposed to make him great and bring immortality. His failures lead him to Doubt and negation of science. Zola decides nothing balancing between knowledge and doubt, affirmation of life and the inevitability of death.
INTERNATIONAL CAPITAL FLOWS AND THE CRYPTOCURRENCY EFFECT
Authors: AKBALIK Murat , APERGIS Nicholas , ZEREN Melis , SARIGÜL Ömer
Published: February 2021

The paper investigates the impact of Bitcoin volatility on international capital inflows through the methodology
of an AR(1)-CGARCH model across a global panel of 132 countries, as well as across different regions, i.e.
Asia, European Union (EU), America (including the US, Canada and Latin American countries), and Africa.
The findings document that there is a strong impact of Bitcoin volatility on global international capital inflows,
as well as in the cases of the American and Asian cases. However, the results document a statistically insignificant
effect for the cases of the EU and African countries.
A SYSTEM DYNAMIC APPROACH FOR DETERMINATION OF OPTIMAL MONETARY POLICY DURING THE COVID-19 ECONOMIC CRISIS: A CASE OF TURKEY
Authors: ÖZTÜRK Oya , GERLİKHAN Selçuk , KANUŞAĞI İlhan , ÖZCAN Can , SERİN Zehra Vildan
Published: February 2021

Starting from mid-March 2020, Covid-19 outbreak spread across the world, the implementation of the social distance and closing the country borders led to the shutdown of economic activities and bring uncertainties for financial markets. Uncertainties have caused a decrease in global risk appetite and resulted to important portfolio outflows from emerging countries. In this process CBRT has started to adopt monetary expansion measures through rate cuts asset purchases to stimulate the financial markets. In this context, this article aims to explore the effects of expansionary monetary policies of CBRT on economic growth, inflation and financial stability in Turkey with a holistic approach. Using a dynamic model, two scenarios were developed covering the period from January 2010 to May 2020. In the first scenario, when monetary expansion policy is implemented, it is assumed that the policy rate and required reserves will not change, but a growth-oriented policy will continue. In the second model, a tight monetary policy, foreign capital inflow and, if necessary, a foreign currency intervention scenario was designed. It was observed that an expansionary monetary policy scenario that is not based on external resources did not fully realize the expected economic recovery. The findings obtained in the second scenario are more effective than the first scenario. Besides that, the second scenario is found more effective on growth, inflation and financial stability.
A study of crystalluria: effectiveness of including hygienic-dietary recommendations in laboratory reports
Authors: Sienes Bailo Paula , Santamaría González María , Izquierdo Álvarez Silvia , Lahoz Alonso Raquel , Serrano Frago Patricia , Bancalero Flores José Luis
Published: February 2021

Objectives

To assess the effectiveness of incorporating hygienic-dietary recommendations in laboratory reports in reducing the incidence of renal colic (RC). A study was performed to compare the incidence of RC in two groups of patients who had suffered at least a crystalluria event associated with the risk of urolithiasis. Recommendations were only incorporated in the laboratory reports of one group.

Methods

A retrospective observational study. The study sample was composed of patients who had at least an episode of crystalluria associated with a higher risk of urolithiasis. The laboratory reports of patients in Group A (n=1,115), treated in 2017, did not include any hygienic-dietary recommendations, whereas patients in Group B (n=1,692), treated in 2018, received hygienic-dietary recommendations through their laboratory reports. χ2 and Mann-Whitney U test were used to assess differences based on sex, age, and type of urinary crystals.

Results

The incidence of RC was 2.02 times higher in group A (2.24%) than in group B (1.12%). No significant differences were observed in the incidence of RC based on the type of urinary crystal. The incidence of RC was substantially higher in patients who suffered at least an event of crystalluria associated with a higher risk for urolithiasis as compared to the general population during the same period (0.46%, consistently with the incidence rates reported in the literature).

Conclusions

The incorporation of messages alerting on the risk of urolithiasis and the inclusion of hygienic-dietary recommendations in laboratory reports may be useful for reducing the incidence of RC.
Semi-automatic decision-making process in histopathological specimens from Barrett’s carcinoma patients using hyperspectral imaging (HSI)
Authors: Maktabi Marianne , Köhler Hannes , Chalopin Claire , Neumuth Thomas , Wichmann Yannis , Jansen-Winkeln Boris , Gockel Ines , Thieme Renè , Ahle Henning , Lorenz Dietmar , Bange Michael , Braun Susanne
Published: February 2021

Discrimination of malignant and non-malignant cells of histopathologic specimens is a key step in cancer diagnostics. Hyperspectral Imaging (HSI) allows the acquisition of spectra in the visual and near-infrared range (500-1000nm). HSI can support the identification and classification of cancer cells using machine learning algorithms. In this work, we tested four classification methods on histopathological slides of esophageal adenocarcinoma. The best results were achieved with a Multi-Layer Perceptron. Sensitivity and F1-Score values of 90% were obtained.
Use of Electrical Impedance Spectroscopy to Distinguish Cancer from Normal Tissues with a Four Electrode Terminal Setup
Authors: Teixeira Viviane S. , Labitzky Vera , Schumacher Udo , Krautschneider Wolfgang
Published: February 2021

Cancer and normal tissues are visually different from each other, especially so in more advanced cancer stages. More important, they are not only visually contrasting, but if an electric field is applied to both tissue types and the frequency is varied in a wide range, it will be seen that the two tissue types in general have a spectral response divergent from each other and this has to do with the characteristics of cancer tissues in contrast to normal ones. In this work, Electrical Impedance Spectroscopy is applied to try to distinguish cancer from healthy tissues by means of their impedance spectrum using a four-electrode-terminal setup. The use of the fourterminal- setup setup is important to circumvent the impact of electrode polarization at frequencies below 1 kHz.
Machine Learning Techniques for Parkinson’s Disease Detection using Wearables during a Timed-up-and-Go-Test
Authors: Hossein Tabatabaei Seyed Amir , Pedrosa David , Eggers Carsten , Wullstein Max , Kleinholdermann Urs , Fischer Patrick , Sohrabi Keywan
Published: February 2021

In this paper, the classification models for Idiopathic Parkinson's syndrome (iPS) detection through timed-up-and-go test performed on iPS-patients are given. The models are based on the supervised learning. The data are extracted via Myo gesture armband worn on two hands. The corresponding models are based on extracted features from signal data and raw signal data respectively. The achieved accuracy from both models are 0.91 and 0.93 with reasonable specificity and sensitivity.
The influence of strut-connectors in coronary stents: A comparison of numerical simulations and μPIV measurements
Authors: Melzer Helena-Sophie , Ahrens Ralf , Guber Andreas E. , Dohse Jakob
Published: February 2021

This paper discusses the influence of different designs of strut-connectors of stents by numerical flow simulations and flow examinations using micro particle image velocimetry (μPIV). Many studies have shown that there is a correlation between the hemodynamics after stent implantation and the cause of biological responses like thrombosis and the in-stent restenosis. Recirculation areas may occur through a stent, which are considered to be the cause of these clinical complications. In this study, three different coronary stent designs are investigated and the hemodynamic effects from the different designs is presented. The study focuses on the design of the strut-connectors that connect two struts. Numerical simulations were performed to evaluate various flow features like recirculation zones, velocity profiles and wall shear stress (WSS) patterns. To verify the numerical results μPIVmeasurements were performed. It could be shown that the alignment in the main stream of the connectors influences the size and number of recirculation zones.
Existence results of noninstantaneous impulsive fractional integro-differential equation
Authors: Kataria Haribhai R. , Patel Prakashkumar H. , Shah Vishant
Published: February 2021

Existence of mild solution for noninstantaneous impulsive fractional order integro-differential equations with local and nonlocal conditions in Banach space is established in this paper. Existence results with local and nonlocal conditions are obtained through operator semigroup theory using generalized Banach contraction theorem and Krasnoselskii’s fixed point theorem, respectively. Finally, illustrations are added to validate derived results.
Effects of Ti-bearing inclusions on intragranular ferrite nucleation
Authors: Qiu Yue , Chen Fuhao , Huang Bangfu , Wu Zhaoyang , Kong Hui
Published: February 2021

The effect of Ti-bearing inclusion characteristics, such as size and marginal composition, on intragranular ferrite (IGF) nucleation has been explored in single sample through SEM and EDS. It can be seen that Ti-bearing inclusions can induce IGF nucleation, and this nucleation ability was scaled by the number of its induced lathes. Statistical analysis suggested that this ability may be correlated with inclusion size, and independent of Ti2O3 content in inclusion. The former can be attributed to the classical theory of heterogeneous nucleation. The latter can be explained by the relationship between the diffusion quantity of Mn and its solubility in Ti2O3 based on the theory of an Mn-depletion zone. Moreover, a probabilistic feature was observed in the nucleation phenomenon which may be due to a small difference in formation energy between the ferrite side plate and the IGF. These results may be helpful to clarify the nature of oxide metallurgy of a Ti-bearing inclusion.
Effect of austenitizing temperatures on the microstructure and mechanical properties of AISI 9254 steel
Authors: Murathan Ömer Faruk , Davut Kemal , Kilicli Volkan
Published: February 2021

In this study, the effect of austenitizing temperatures and low-temperature isothermal heat treatment (below martensite start temperature) on the microstructure and mechanical properties of AISI 9254 high silicon spring steel has been investigated. Experimental studies show that ultra-fine carbide-free bainite, tempered martensite and carbon enriched retained austenite could be observed in isothermally heat-treated samples where the as-received sample consisted of fine pearlite. A high tensile strength of ~2060 MPa, a total elongation of ~8 %, and absorbed energy of 105 J were achieved in a commercial high-Si steel by austempering below the Ms temperature. A good combination of strength and ductility has been obtained in prolonged austempering below the martensite start temperature (225 °C) from an austenitizing temperature of 870 °C.
Automation of pipe defect detection and characterization by structured light
Authors: Silva Lucas Kling e , Almeida Gustavo , Nunes Creison , Pereira Gabriela Ribeiro , Kadoke Daniel , Daum Werner
Published: February 2021

High quality tubular products are essential to the oil and gas industry. Quality control during their production focuses on the non-destructive detection of surface defects. The structured light technique is a candidate for the challenge to detect, monitor and evaluate such defects in real-time. In the present study the automatic processing of structured light measurements is performed and validated. The algorithm for the automatic analysis of inspection data has an advantage over current data evaluation methods based on individual assessments of operators.
Friction and wear properties of heavy load truck composite brake linings
Authors: Bayram Emre , Topuz Ahmet
Published: February 2021

Materials for friction used in brakes should fulfill many requirements, such as stable friction performance in all conditions, lower change in the friction coefficient, high wear resistance and low wear rate. In this study, three different compositions were produced to investigate the effects of each composition and its manufacturing parameters. Three different compositions, which are called standard, fly ash and sisal fiber mixture, were produced to be compared with existing commercial heavy-duty truck brake lining. These compositions were homogeneously mixed and hot molded at different pressures and temperatures. The post-curing effect was also investigated in some of the samples. The wear and friction tests were performed using a friction tester. The density and hardness of the samples were also analyzed in relation to compositions and manufacturing parameters. The coefficient of friction and wear behavior was compared with a commercial heavy-duty truck brake lining. The results suggest that there is a high potential in the samples investigated for commercial trucks applications of brake lining products that are highly suitable from the environmental and cost reduction view.
A novel graphene-based Fe3O4 nanocomposite for magnetic particle inspection
Authors: Zhang Zhongqiang , Lu Leijun , Yi Yipin
Published: February 2021

The magnetic particle material is the crucial part in the field of nondestructive inspection. Nevertheless, traditional magnetic particle still leaves much to be desired. In this research, we designed a simple procedure to synthesize a novel graphene-based ferroferric oxide (Fe3O4) nanocomposite. All characterizations implied that Fe3O4 was anchored on the surface of reduced graphene oxide (RGO) nanosheets successfully. Especially this specimen reveals significant magnetic property improvement and macroscopic stability because of the synergistic effect between Fe3O4 and graphene, as compared to the traditional magnetic particle. More importantly, our method optimizes intrinsic magnetization intensity, reduces remanence and sedimentation velocity of magnetic particle material. Thus, this nanocomposite holds great potential for the field of magnetic particle inspection.
The crystal structure of 2,6-dibromo-4-fluoroaniline, C6H4Br2FN
Authors: Hosten Eric C. , Betz Richard
Published: February 2021

C6H4Br2FN, monoclinic, P21/c (no. 14), a = 17.0332(5) Å, b = 4.34070(10) Å, c = 21.9732(5) Å, β = 109.6910(10)°, V = 1529.61(7) Å3, Z = 8, R

gt
(F) = 0.0256, wRref
(F
2) = 0.0518, T = 200 K.
The crystal structure of 4-chloro-N-(2-phenoxyphenyl)benzamide, C19H14ClNO2
Authors: Hosten Eric C. , Betz Richard
Published: February 2021

C19H14ClNO2, monoclinic, P21/c (no. 14), a = 19.328(4) Å, b = 7.1086(12) Å, c = 11.627(2) Å, β = 99.417(9)°, V = 1576.0(5) Å3, Z = 4, R

gt
(F) = 0.0582, wR

ref
(F
2) = 0.1615, T = 200 K.
Redetermination of the crystal structure of 3,3,3-triphenylpropanoic acid, C21H18O2 – Deposition of hydrogen atomic coordinates
Authors: Hosten Eric C. , Betz Richard
Published: February 2021

C21H18O2, triclinic, P

1
‾

$‾{1}$

(no. 2), a = 9.8213(6) Å, b = 9.9212(6) Å, c = 10.0400(6) Å, α = 65.510(2)°, β = 63.539(2)°, γ = 84.842(2)°, V = 791.59(8) Å3, Z = 2, R

gt
(F) = 0.0463, wR

ref
(F
2) = 0.1101, T = 200 K.
The crystal structure of diaquahydrogen 2,5-dimethylbenzenesulphonate, C8H14O5S
Authors: Hosten Eric C. , Betz Richard
Published: February 2021

C8H14O5S, monoclinic, P21 (no. 4), a = 6.3783(4) Å, b = 8.2630(5) Å, c = 10.5891(7) Å, β = 90.877(2)°, V = 558.02(6) Å3, Z = 2, R

gt
(F) = 0.0254, wR

ref
(F
2) = 0.0715, T = 200 K.
East meets west in the 6th millennium: Mesolithic osseous tools and art from Sise on the Latvian seaboard
Authors: Zagorska Ilga , Lõugas Lembi , Lübke Harald , Meadows John , Pettitt Paul , Macāne Aija , Bērziņš Valdis
Published: February 2021

A collection of 141 bone and antler tools and debitage pieces recovered from the River Užava at the village of Sise constitutes the largest Mesolithic osseous assemblage in western Latvia. Radiocarbon dating of 12 pieces suggests that most of this collection dates from the 6th millennium calBC. We present a general analysis, highlighting typical and unique tool forms, ornamented and sculpted pieces, and assess the corpus in a wider geographical context.

Predominant in this rich and diverse collection are heavy duty antler tools: various forms of adzes, axes and hammers as well as sleeves, made either from shed antler or antler of hunted animals. They include two pieces classifiable as T-axes. Spear- and arrowheads as well as daggers are also present, along with chisels, wedges, awls and other tools. Artistic representations include five sculpted and engraved objects.

The heavy duty red deer antler tools have parallels in the region south of the Baltic Sea, whereas the bone projectile forms are familiar from Kunda and Narva Culture sites of the East Baltic; the closest similarity is with osseous assemblages from coastal western Lithuania.
Temática circense en los cuentos El vuelo de los cóndores de Abraham Valdelomar y Fénix de Julio Ramón Ribeyro
Authors: Santivañez Valle Jesús Humberto
Published: February 2021

Este trabajo examina el tema del circo en dos importantes cuentos de la literatura peruana: El vuelo de los cóndores y Fénix, los cuales pertenecen al Postmodernismo y al Neorrealismo respectivamente. Mediante el método comparativo se analizarán tres tópicos en común como son de la problemática laboral del circo, principales personajes circenses y el valor social del circo en estos dos cuentos clásicos de la literatura peruana. Los resultados de este análisis nos servirán para comprender la poética de ambos escritores, Abraham Valdelomar y Julio Ramón Ribeyro.    

PALABRAS CLAVE: Cuento peruano – Postmodernismo Peruano - Neorrealismo peruano – Comparativa Literaria - Circo
Mujeres fatales desafían el statu quo. Estudio de tres novelas del mundo hispánico y su adaptación cinematográfica
Authors: Hernández Landa Valencia Verónica
Published: February 2021

La mujer fatal ha sido estudiada como un recurso del que se valió el arte para estigmatizar y someter a las mujeres que, a lo largo de la historia, se rebelaron contra el statu quo. Sin embargo, también a través de ella se han señalado las debilidades, hipocresías, decadencia y autoritarismos del orden patriarcal en el que se inserta. El presente artículo tiene como objetivo explorar esa ambivalente funcionalidad del personaje, por medio del contraste entre tres discursos novelescos en los que la mujer fatal se constituye en eje problemático de la trama, y las diferentes propuestas de resignificación del mismo que resultaron de las adaptaciones cinematográficas. Se trata de novelas hispanoamericanas publicadas en el último tercio del siglo XX, Pantaleón y las visitadoras, de Mario Vargas Llosa, Luna caliente, de Mempo Giardinelli, y Las edades de Lulú, de Almudena Grandes, y de las respectivas adaptaciones dirigidas por Francisco Lombardi, Roberto Denis y Bigas Luna. La comparación toma como unidad de análisis el tópico de la poderosa sexualidad que conduce a la perdición, y para alcanzar el objetivo del estudio se propone una conceptualización del tópico que permite visibilizar su función retórica y su capacidad de adaptarse y resignificarse en cada nuevo discurso. Con esta propuesta se busca no sólo resaltar la ambivalencia y el potencial transgresor de la mujer fatal, sino también promover el enfoque retórico en el análisis de los tópicos y de los personajes tematizados por la tradición literaria.
Teoría estética. La resurrección del arte
Authors: SILVIA ANDRELI DÍAZ NAVARRO LUIS GABRIEL MATEO MEJÍA
Published: February 2021

Resumen: Si la teoría estética fue considerada hace años como una crítica de vanguardia ante los movimientos culturales y artísticos, fue debido a la importancia de sus análisis y razonamientos. Posteriormente, la teoría estética ha pasado a segundo plano debido a las severas críticas de la filosofía postmodernista, razón por la cual, se hace necesario retomar el proyecto de una filosofía del arte. En este caso, se habla de una estética analógica.

Palabras Clave: Hermenéutica analógica, Teoría estética, Historia del arte, Teoría del arte.
Presentación. Teorías Críticas del Neoliberalismo
Authors: Prestifilippo Agustín Lucas
Published: February 2021

En un diálogo que tuvo sitio recientemente en la ciudad de Lyon, Nancy Fraser y Luc Boltanski (2016) se formularon la siguiente pregunta: ¿cuál es el objeto de la actual Teoría Crítica de la Sociedad? Si de lo que se trata es de ofrecer medios conceptuales a las luchas sociales de nuestro tiempo, esto es: si queremos comprender el rostro que asume el sistema de explotación y dominación social contemporánea, inevitablemente nos topamos con la realidad del neoliberalismo. Pero al identificar nuestro presente como un tiempo signado por la forma social neoliberal, ¿no se pierde de vista su inscripción esencial en el patrón de acumulación capitalista? 

Los textos que componen este dossier presentan lecturas que se mueven alrededor de la inevitabilidad de este debate, toda vez que el pensamiento radical del siglo XXI no desiste de ofrecer una correcta caracterización de nuestro mundo social.
Historical air photo missions in the Maritimes during the early 1920s: coverage, thematic scope, and utility 100 years later
Authors: Werle Dirk
Published: February 2021

The historical and technological developments of powered flight and aerial photography have early connections in the Maritimes. Following the Great War (1914-18), a series of pioneering survey missions were initiated by the Canada Air Board in the civilian domain. From a science perspective, the air photos offer a unique opportunity for the detection of environmental change at an unusual centennial time scale. The missions of the early 1920s initially relied on military surplus seaplanes and innovative camera equipment that yielded several thousand high-resolution vertical air photos. This paper is focussed on the scope and outcome of the first experiments carried out over Nova Scotia and New Brunswick between 1921 and 1925, prior to more systematic use for topographic mapping during the remainder of that decade. The research is based on archival records and partial reconstruction of the digitized air photos into image mosaics. Photo interpretation and comparison with recent high-resolution satellite imagery offer insights concerning land use and land cover changes, coastal dynamics, and transformation of urban, rural and industrial landscapes. Experience todate with these early air photos and mosaics of the Maritimes holds promise for examining similar aerial survey missions in other parts of Canada.
The Social Change of Barru District Society Due to the Construction of the Makassar - Parepare Railway Line
Authors: Darwis S Jailany , Banowati Eva , Husain Fadly
Published: February 2021

Indonesia that continued to change over time will no doubt affect the aspects of life. Aspect that could provide sustenance was the need of transportation through the construction of the Makassar - Parepare railway line. The goal was to know the social changes and adaptation patterns of children when social changes occurred as a result of the construction of the Makassar-Parepare railway. This study used qualitative method with descriptive analysis. The informants of the study were; 1) PPK Railway Development of South Sulawesi, 2) Affected communities, 3) Head of BPD in Ajakkang village, and 4) Head of Polewali environment. The data collection technique of this study were interviews, observation, and documentation. The results is construction of the Makassar - Parepare railway led a social change that could be seen based on the process and time. The planned social change occurred because the government is the agent of change in the development. The unplanned social change occurred because of the flooding. The form of social change based on the time of revolution in development has led to conflict due to different interests. The adaptation of children to social changes in society tends to conformity adaptation rather than other forms of adaptation.
Flash Interactive Media to Improve the Mastery of Light Properties Concept
Authors: Widyaningsih Mitasari , Samsudi Samsudi , Ellianawati Ellianawati
Published: February 2021

The purpose of this study is to analyze the effect of flash interactive media in improving students' understanding of concepts in elementary schools. This type of research was mixed methods with an embedded experimental model design. Quantitative data analysis techniques on the variable understanding of the concept, namely the results of the analysis of the students' pretest and posttest questions by using paired sample t-test. The results of the analysis are then triangulated with the qualitative Focus Group Discussion (FGD) data and the results of the interviews. This study involved 54 students who were selected by using the nonprobability sampling technique: purposive sampling. The population consists of 31 public schools and 13 private schools. The results of this study show a significant increase in the concept of understanding in the form of an increase in the average score understanding of concepts by 17.82%. According to questionnaire data that has been distributed, teachers and students respond very well to learning using the flash interactive media. Students' motivation to learn accompanies an increase in their understanding of concepts. It appears that the application of flash interactive media in science learning has a positive impact on increasing motivation that has an impact on increasing students' conceptual understanding.
The Influence of Parental Attachment toward Early Childhood Children's Separation Anxiety
Authors: Astuti Umi , Hartono Hartono , Sunawan Sunawan
Published: February 2021

Most preschool children show incapabilities of overcoming anxieties so that they have negative emotions while parting with an intimate figure. This research examined parental attachment toward early childhood children's parting anxieties. The research population consisted of 793 participants aged 5-6 years old. The sampling technique was purposive sampling. It involved 185 early childhood children (87 boys and 98 girls). The data were collected through a questionnaire. The data technique used the Parental-Child Attachment-Child Survey questionnaire to measure parental attachment to children. Separation anxiety in early childhood was measured using the Children's Separation Anxiety Disorders (CSAS) questionaire. Each question item was read by the researcher to facilitate the children. The applied analysis was a simple linear regression. It was to analyze the parental attachment toward children's separation anxiety. The result shows Fcount = 15.26 < Ftable = 3.045 with a Sig value 0.000 < 0.05. It means high parental attachment lowered children's separation anxiety at schools. This child-parent intimacy supported adaptive social quality in a peer group. It also provided a positive foundation for their further development.