bluuebunny/crossref_metadata_2025 huggingface dataset:
Solution of the Problem of Odometric Positioning of a Mining Machine under the Ground by Using a Kalman Filter
Authors:   Perm National Research Polytechnic University, Shevelev I.M. , Zatonskiy A.V.
Published: June 2021

In the modern mining industry, an urgent technical challenge is the introduction of automatic systems that provide orientation and positioning of mining machines during the development of industrial seams. There are several basic technologies used for positioning combines underground, but their scope is limited by various mining, geological and technological factors. In the conditions of industrial development of VKMKS seams, the vast majority of them are not suitable. Aim. To develop a new approach to the problem of odometric positioning of a mining machine under the ground, as well as to create a simulation model that allows with the required degree of accuracy to determine the current and predicted distance of the miner from the start of production in conditions of noisy measurements. Materials and methods. As a technical solution to the task, the use of BLE (Bluetooth Low Energy) technology is proposed: iBeacon beacons will be dropped in the direction of the combine's movement, and a sensor attached to the rear of the loading bunker will read the distance to the beacon. For simulation modeling of uncertainty during the movement of the combine, the hypothesis of the normal distribution of the speed of movement on sections of random length was considered. When simulating the dropping of the beacon, the hypothesis was used that the scattering value of the beacon upon falling is a two-dimensional normally distributed random variable. Noisy measurements were generated by a stochastic process with increasing scatter boundaries as the sensor moved away from the beacon. The Kalman filter was used as a tool for processing measurement noise. Results. A model has been created that simulates random speeds of the combine's movement on sections of random length, and also a random spread when throwing off Blue¬tooth beacons has been simulated. To generate sensor measurements, an algorithm has been deve¬loped that takes into account the increase in the noise level of the readings when moving away from the nearest dropped beacon. To process the simulated measurements and correctly determine the distance of the beacon-sensor, the Kalman filtering algorithm was used. Conclusion. The proposed approach and the created simulation model make it possible, with a given degree of accuracy, to determine and predict the distance to the withdrawing shearer when mining industrial seams.
Finite-Difference Models Application for Short-Term Forecasting of the Natural Resource Potential of the Perm Region
Authors:   Perm National Research Polytechnic University, Sirotina N.A. , Kopoteva A.V. , Zatonskiy A.V.
Published: June 2021

The article is about a problem of mathematical modeling of the natural resource potential of the Perm Territory by 1st and 2nd order finite-difference models. Such models can obtain better forecasts of complex socio-economic processes in comparison with the traditionally used linear multiple regression models. A high quality model of the natural resource potential with forecast possibi¬lities is one of the necessary conditions for the effective management of the natural resources of the region in order to ensure its sustainable economic development. Purpose of work. Aim of this work is work construction of finite-difference models of a natural resource potential complex indicators and an assessment of their prognostic properties. Materials and methods. Our research is based on Perm region statistical data for the period from 2001 to 2018. A multiple linear regression model is used as a comparison base. The natural resource potential complex indicator is calculated as a weighted sum of particular criteria characterizing the natural resources of the region. First and second order finite difference models are obtained by adding autoregressive terms of the first and second orders, respectively, to the multiple linear regression model. An estimation of the unknown parameters of the equations is carried out by a modified least squares method, which preserves the signs of the coefficients with the factors the same as in the original linear model. At the same time, the selection of explanatory factors and the assessment of the quality of the models are carried out based on the accuracy of the predicted values of the studied indicator. The results of the study. Components and factors of the natural resource potential is obtained, and a procedure for constructing finite-difference models is performed for three different time intervals: 2001–2018, 2001–2008, and 2008–2018. These intervals are chooseen because changes in the methodology for generating statistical data nearly 2008. Discussion and conclusions. The number of calculated predicted values was 18, and only in 4 out of 18 cases (22,2%) their quality is worse than forecasts obtained by the linear multiple model. So proposed modification of the multiple linear regression model with the addition of autoregressive terms makes it possible to improve the forecasting quality of the complex indicator of the natural resource potential of the region and, therefore, to make more effective decisions when managing its level.
Engineering Design, Performance Test and Cost Analysis of Nutrition Mixer
Authors: Kuala Seri Intan , Susanti Novita Dwi , Siregar Yusnan Hasani , Haryanto Aidil , Basuki Galih Riyan
Published: June 2021

At present mixing of nutrients in the hydroponic is still done manually (ineffective and inefficient). For that we need a tool that can mix plant nutrients equipped with a system that regulates the amount of solute (Total Dissolved Solid, TDS with ppm units) and agitator. The design consist of structural and functional, construction, testing and cost analysis. The results obtained dimensions of 0,85 m x 0,55 m x 1,55 m, consisting of a reservoir, container nutrition with a capacity of 100 liters equipped with agitators driven by a 45 watt DC motor. The performance of the electrical system is carried out to ensure adequate nutrition (indicated with TDS value) and water level in the reservoir. TDS flatness testing and nutrient temperature every 720 seconds in the range of 3600 seconds at 5 points, each has an average deviation of 1,443% + 5% and 4,9054% + 5%. Testing of planting using mixing equipment in pakcoy and spinach plants was 5,95 kg and 2,5056 kg more than without using a mixing equipment. Whereas for the analysis of the production costs of mixing equipment and obtained Rp8.981.091. In analyzing the costs of planting the difference between the market price is Rp13.273.
Coordinated control among PSS, WTG and BESS for improving Small-Signal Stability
Authors: Alias Feba , Singh Manohar
Published: June 2021

The goal towards attaining a sustainable future has led to the rapid increase in the integration of converter control based generators (CCBGs). The low inertia response characteristics of CCBGs and the weak tie lines in interconnected systems pose a huge threat to Small-Signal Stability (SSS). Adequate damping of low-frequency oscillations (LFO) is pivotal in ensuring the maximum power transfer through the critical transmission corridors. These operational issues become more serious with the significant reduction in system inertia as a result of the high penetration of CCBGs. Therefore, appropriate control techniques are an absolute requirement for preventing LFOs from limiting the penetration of CCBGs in interconnected networks. This may also eventually lead to revisions in grid codes mandating CCBGs to provide auxiliary damping control. But, the progressive addition of multiple damping controllers for specific target modes can lead to the drifting of eigenvalues (EVs) associated with other electromechanical modes (EMs) in the system. This is due to the adverse interactions between multiple damping controllers in the uncoordinated control approach and may result in deteriorating SSS. Therefore, this paper proposes a simultaneous coordinated control among Battery Energy Storage System (BESS), Wind Turbine Generators (WTG) and Power System Stabilizer (PSS) for enhancing SSS in networks with high wind penetration by considering both inter-area (IA) and local modes. The performance of the proposed coordinated control is corroborated using IEEE 68 bus system for multiple operating scenarios for which the critical modes in the system have the lowest damping index (DI). The effectiveness of modulating the active power, reactive power and simultaneous modulation of both active and reactive power injected by BESS along with a dual-channel Optimized WTG Damping Controller (DOWDC) and PSS is evaluated. The impact of the different coordinated control strategies on voltage dynamics is also investigated. The simulation results validate the better performance of the proposed coordinated control over uncoordinated control approaches.
How to have fun with sticks, bowls, and colored water: insights into multimodal signifier operations through Lacan’s four discourses
Authors: Ranker Jason
Published: June 2021

In this manuscript, I present a signifier-based, multimodal discourse analysis of a focal event involving four children (ages 4–5) as they interacted with materials and with one another in their preschool classroom. I draw upon Jacques Lacan’s theory of the four discourses, applying the mathemes, or formulas that he developed, in order to map the multimodal signifier operations as they occurred in the moment-to-moment interactions during the event. My purpose was to use the signifier as a conceptual tool for multimodal discourse analysis, which revealed the highly particular discursive agencies that are characteristic aspects of signifier operations. Further, I examined the movement and operations of the signifiers as they were drawn from across modes and combined to create opportunities for the subjects to participate in the discourse. These signifier operations occurred according to discursive agencies of an educational discourse that both reduced and delimited subjectivities, as well as agencies that the focal subjects introduced to challenge and re-signify toward new ways to participate in the discourse.
Indeterminate thyroid cytology: detecting malignancy using analysis of nuclear images
Authors: Hayashi Caroline Y , Jaune Danilo T A , Oliveira Cristiano C , Coelho Bárbara P , Miot Hélio A , Marques Mariângela E A , Tagliarini José Vicente , Castilho Emanuel C , Soares Carlos S P , Oliveira Flávia R K , Soares Paula , Mazeto Gláucia M F S
Published: June 2021

Background

Thyroid nodules diagnosed as 'atypia of undetermined significance/follicular lesion of undetermined significance' (AUS/FLUS) or 'follicular neoplasm/suspected follicular neoplasm' (FN/SFN), according to Bethesda’s classification, represent a challenge in clinical practice. Computerized analysis of nuclear images (CANI) could be a useful tool for these cases. Our aim was to evaluate the ability of CANI to correctly classify AUS/FLUS and FN/SFN thyroid nodules for malignancy.

Methods

We studied 101 nodules cytologically classified as AUS/FLUS (n = 68) or FN/SFN (n = 33) from 97 thyroidectomy patients. Slides with cytological material were submitted for manual selection and analysis of the follicular cell nuclei for morphometric and texture parameters using ImageJ software. The histologically benign and malignant lesions were compared for such parameters which were then evaluated for the capacity to predict malignancy using the classification and regression trees gini model. The intraclass coefficient of correlation was used to evaluate method reproducibility.

Results

In AUS/FLUS nodule analysis, the benign and malignant nodules differed for entropy (P < 0.05), while the FN/SFN nodules differed for fractal analysis, coefficient of variation (CV) of roughness, and CV-entropy (P < 0.05). Considering the AUS/FLUS and FN/SFN nodules separately, it correctly classified 90.0 and 100.0% malignant nodules, with a correct global classification of 94.1 and 97%, respectively. We observed that reproducibility was substantially or nearly complete (0.61–0.93) in 10 of the 12 nuclear parameters evaluated.

Conclusion

CANI demonstrated a high capacity for correctly classifying AUS/FLUS and FN/SFN thyroid nodules for malignancy. This could be a useful method to help increase diagnostic accuracy in the indeterminate thyroid cytology.
The relationship between insulin sensitivity and serum antithrombin 3 activity in patients with type 2 diabetes
Authors: Wang Hong , Cao Jie , Su Jian-bin , Wang Xue-qin , Zhang Dong-mei , Wang Xiao-hua
Published: June 2021

Background

Antithrombin 3 (AT3) is a physiological inhibitor of thrombin, and serum AT3 activity was found to decrease at the status of type 2 diabetes (T2D). T2D was presented with an increased risk of thrombotic complications at the background of impaired insulin sensitivity. The aim of this study was to investigate the relationship between insulin sensitivity indices and serum AT3 activity in patients with T2D.

Methods

We conducted a cross-sectional study in patients with T2D who consented to participate in the study at the Endocrinology Department of Affiliated 2 Hospital of Nantong University from January 2015 to June 2018. All patients received serum AT3 activity test and 75 g oral glucose tolerance test (OGTT). Basal and systemic insulin sensitivity were assessed by homeostasis model assessment of insulin resistance (HOMA-IR) and Matsuda index (ISIMatsuda), respectively, from the OGTT. And other relevant clinical data were also collected.

Results

Total of 1612 patients with T2D were enrolled in the study, with a mean age of 58.67 ± 13.09 years and a median diabetes duration of 6 years (interquartile range, 1–10 years). Across ascending quartiles of serum AT3 activity, HOMA-IR progressively decreased, while ISIMatsuda progressively increased (all P for trend < 0.001). Moreover, serum AT3 activity was negatively correlated with HOMA-IR (r = −0.189, P < 0.001) and positively correlated with ISIMatsuda (r = 0.221, P < 0.001). After adjusting for other metabolic risk factors, hemostatic parameters and glucose-lowering therapies by multivariate linear regression analysis, HOMA-IR (β = −0.185, t = −5.960, P < 0.001) and ISIMatsuda (β = 0.197, t = 6.632, P < 0.001) remained independently associated with the serum AT3 activity in patients with T2D, respectively.

Conclusions

Reduced basal and systemic insulin sensitivity are associated with decreased serum AT3 activity in patients with T2D.
Properties of Pinus modified with silicon–titanium binary oxides
Authors: Liu Xiaoling , Chen Songwu , Fu Yunlin
Published: June 2021

Modification of Pinus yunnanensis using SiO2–TiO2 was carried out via the sol–gel method. The aim was to improve the hydrophobicity, aging resistance, and photocatalysis of the wood surface via the formation of new chemical bonds with penetrated SiO2 and TiO2. The air-dried P. yunnanensis wood underwent penetration, gelation, aging, and drying. The wood was exposed to high temperatures for modification, and its microstructure, composition, photodegradability, resistance to aging, dimensional stability, and hydrophobicity were then determined. The results indicated that during modification, SiO2–TiO2 gel was generated in the wood, and the content of the gel increased as penetration time was extended. No structural change in the wood was observed. Meanwhile, chemical bonds were formed among SiO2, TiO2, and wood. The contact angle of the modified wood increased noticeably relative to that of unmodified wood. This increase indicated a noticeable increase in the hydrophobicity of the wood surface. The modified wood exhibited high photocatalytic degradation; however, its durability was not evident. The water absorption and thickness swelling of the modified wood markedly increased. After ultraviolet-aging resistance testing, the color change in the surface of the modified wood was noticeably less than that of the unmodified wood.
Native Americans and Science: Enhancing Participation of Native Americans in the Science and Technology Workforce through Culturally Responsive Science Education
Authors: Cajete Gregory
Published: June 2021

A major issue that directly affects the participation of Native Americans in the science and technology workforce is the lack of preparation in science and math. This lack of preparation has many causes, but one of the most strategically important issues is the lack of culturally relevant curricula that engage Native American students in learning science in personal, social and culturally meaningful ways. This essay explores the needs, issues, research, and development of culturally responsive science education for Native American learners. A curriculum model created by the author at the Institute of American Indian Arts in Santa Fe, New Mexico, from 1974 to 1994 based on Native American cultural orientations is explored as a case study as one example of how to engage Native American students in science learning and become more prepared to participate in science and technology-related professions. As such, it presents a methodology for how trans-systemic work might be approached in building conceptual bridges between Indigenous and Western views of science.
GIBBERELLINS IN REGULATION OF PLANT GROWTH AND DEVELOPMENT UNDER ABIOTIC STRESSES
Authors:   Kholodny Institute of Botany of the National Academy of Sciences of Ukraine, Kyiv, Kosakivska I. V.
Published: June 2021

Background. Gibberellins (GAs), a class of diterpenoid phytohormones, play an important role in regulation of plant growth and development. Among more than 130 different gibberellin molecules, only a few are bioactive. GA1, GA3, GA4, and GA7 regulate plant growth through promotion the degradation of the DELLA proteins, a family of nuclear growth repressors – negative regulator of GAs signaling. Recent studies on GAs biosynthesis, metabolism, transport, and signaling, as well as crosstalk with other phytohormones and environment have achieved great progress thanks to molecular genetics and functional genomics. Aim. In this review, we focused on the role of GAs in regulation of plant gtowth in abiotic stress conditions. Results. We represented a key information on GAs biosynthesis, signaling and functional activity; summarized current understanding of the crosstalk between GAs and auxin, cytokinin, abscisic acid and other hormones and what is the role of GAs in regulation of adaptation to drought, salinization, high and low temperature conditions, and heavy metal pollution. We emphasize that the effects of GAs depend primarily on the strength and duration of stress and the phase of ontogenesis and tolerance of the plant. By changing the intensity of biosynthesis, the pattern of the distribution and signaling of GAs, plants are able to regulate resistance to abiotic stress, increase viability and even avoid stress. The issues of using retardants – inhibitors of GAs biosynthesis to study the functional activity of hormones under abiotic stresses were discussed. Special attention was focused on the use of exogenous GAs for pre-sowing priming of seeds and foliar treatment of plants. Conclusion. Further study of the role of gibberellins in the acquisition of stress resistance would contribute to the development of biotechnology of exogenous use of the hormone to improve growth and increase plant yields under adverse environmental conditions.
Suas e trabalho profissional
Authors: Sposati Aldaiza
Published: June 2021

Este artigo se ocupa do significado da ação interprofissional no âmbito da atenção à população na efetivação de uma política social. Tem por objetivo identificar se o desempenho de uma profissão, no trabalho em equipe, destaca o poder exercido por essa profissão sobre outras, e se distancia da articulação interprofissional para alcance do objetivo comum: o direito do cidadão. Para exame empírico da questão refere-se a enquete realizada durante pandemia da COVID-19 e pesquisas realizadas pelo Núcleo de Estudos e Pesquisas sobre Seguridade e Assistência Social da Pontifícia Universidade Católica de São Paulo (NEPSAS/PUC-SP).
Potentiality of a residential area: Practical design at Brigittaplatz
Authors: He Qingchang , Reith Andras
Published: June 2021

Brigittaplatz located in the 20th district of Vienna, which is a mixed culture residential community with various issues. This paper attempts to uncover the existing problems, weaknesses, potential opportunities of the site and explore a set of local interventions to accomplish site regeneration through architectural and landscape measures. Study utilizes two axes to improve and reconnect the public service, green corridor as well as the interactive relationship. All the proposed interventions are not merely public facility renewal but a new functional and social design, which is trying to reactivate the various relationships in the site that can enhance the quality of life and carry over the impact to larger scales. Authors seek a holistic approach to regenerate Brigittaplatz.
Parameterization of the rainfall-runoff model in changing climate
Authors: Aleksić Milica , Sleziak Patrik , Hlavčová Kamila
Published: June 2021

A conceptual rainfall-runoff model was used for estimating the impact of climate change on the runoff regime in the Myjava River basin. Changes in climatic characteristics for future decades were expressed by a regional climate model using the A1B emission scenario. The model was calibrated for 1981–1990, 1991–2000, 2001–2010, 2011–2019. The best set of model parameters selected from the recent calibration period was used to simulate runoff for three periods, which should reflect the level of future climate change. The results show that the runoff should increase in the winter months (December and January) and decrease in the summer months (June to August). An evaluation of the long-term mean monthly runoff for the future climate scenario indicates that the highest runoff will occur in March.
Hydropriming Improves Germination and Plant Recovery During Embryo Rescue of Wild Banana Musa acuminata var. tomentosa
Authors: Prawestri Apriliana Dyah , Riastiwi Indira , Rahayu Resa Sri , Handayani Tri , Leksonowati Aryani , Poerba Yuyu Suryasari
Published: June 2021

Wild bananas are believed to have genes for resistance to biotic and abiotic stress in nature, making them potential genetic resources for creating superior varieties. Wild banana seeds, such as Musa acuminata var. tomentosa are generally difficult to germinate in vivo, so that in vitro embryo culture technique is needed. This study aimed to increase embryo germination and regeneration of wild banana M. acuminata var. tomentosa by soaking the seeds as hydropriming. The treatment comprised of soaking the seeds in sterile distilled water for four periods of time: 0 (control), 1, 4, and 7 days. A total of 45 embryos for each treatment were planted on petri dishes containing MS + 0.5 mg/L BA + 1 mg/L biotin + 1 mg/L proline. The results showed that hydropriming increased the rate of embryo germination and regeneration. Seeds soaked for 1, 4, and 7 days successfully resulted in embryo germination percentages of 87%, 62%, and 62%, respectively, while the control unsoaked seeds germinated with a lower percentage of 42%. One-day soaking treatment was the most optimal treatment to increase the rate of germination and regeneration as well as obtained the best vigor as demonstrated by the highest average height of plantlets, number of leaves, and roots than other treatments. Thus, 1-day seed hydropriming is the best treatment for embryo rescue and regeneration of wild banana M. acuminata var. tomentosa
Manajemen Pelayanan Haji dan Umroh di Kementerian Agama Kabupaten Mojokerto
Authors: Herlyanda Dea Fajar , Ali Mukti , M Nurul Wahidatul , Ayu Wilis , Sholihah Ni’matus
Published: June 2021

Penelitian ini bertujuan untuk mengetahui dan mendeskripsian tentang manajemen pelayanan haji dan umroh di kementerian agama kabupaten Mojokerto. Metode penelitian yang digunakan adalah penelitian kualitatif. Teknik pengumpulan data menggunakan wawancara, observasi dan dokumentasi dengan informan yaitu pengelola bagian penyelenggaraan haji dan umroh dan petugas PHU. Hasil penelitian menunjukkan bahwa bagian penyelenggaraan Haji dan Umrah Kantor Kementerian Agama Kabupaten Mojokerto memiliki sebuah pelayanan yang dapat memudahkan jama'ah untuk melakukan pendaftaran yakni pelayanan satu atap yang berdiri pada tahun 2016  Pada awalnya, fungsi secara umum dari pelayanan haji dan umrah adalah untuk meningkatkan pelayanan dan penyelenggaraan ibadah haji dan umrah. Setelah dilakukan penelitian ini, dapat disimpulkan bahwa dengan adanya manajemen pelayanan haji dan umroh, kegiatan atau aktivitas dalam layanan bisa terkoordinir atau terstruktur dengan baik, sehingga calon jamaah haji dan umroh merasa nyaman.
Manajemen Pelayanan Kantor Kementerian Agama Kabupaten Lamongan di Era Industrialisasi 4.0
Authors: Roihannah Nur Hidayati , Fitria Hidayatul , Ningrum Irma Erviyana
Published: June 2021

Penelitian ini mengkaji tentang pelayanan manajemen kantor di Kantor Kementerian Agama Kabupaten Lamongan. Fokus dalam  penelitian ini adalah gambaran layanan manajemen kantor di Era Industrialisasi 4.0 di Kantor Kementerian Agama Kabupaten Lamongan. Berdasarkan fokus penelitian tersebut, selanjutnya penelitian ini bertujuan untuk mengetahui gambaran pelayanan manajemen kantor pada Kantor Kementerian Agama Kabupaten Lamongan. Pendekatan yang digunakan dalam penelitian ini adalah pendekatan deskriptif kualitatif,  sedangkan yang menjadi unit analisis dalam penelitian ini adalah Kepala Sub Bagian TU, Kepala Seksi masing-masing bidang dan Tamu Kantor Kementerian Agama Kabupaten Lamongan. Teknik pengumpulan data yang digunakan adalah observasi, wawancara dan dokumentasi. Berdasarkan hasil reduksi data maka hasil penelitian  ini menunjukkan bahwa, layanan manajemen kantor yang berkualitas di Kantor Kementerian Agama Kabupaten Lamongan masih belum terlaksana secara efektif dan efesien.
Manajemen Kesiswaan dalam Meningkatan Kualitas Peserta Didik melalui Program Karya Tulis Ilmiah
Authors: Ichsani Ilyas , Pamungkas Bayu Candra , Subty Taufiq , Wahyudin Anton
Published: June 2021

Manajemen kesiswaan merupakan seluruh kegiatan pembinaan dan pengembangan peserta didik yang dilaksanakan secara kontinu untuk menumbuhkan bakat, minat, dan kemampuan peserta didik melalui kegiatan kurikuler dan ekstrakulikuler. Program karya tulis ilmiah merupakan salah satu program dalam ranah kesiswaan yang dibuat dan dijalankan untuk melatih dan mengembangkan para peserta didik dalam melaksanakan penelitian dan penulisan suatu karangan ilmiah. Tujuan penelitian ini adalah untuk menjelaskan: (1) Manajemen kesiswaan dalam implementasi program karya tulis ilmiah; (2) kendala yang dihadapi dalam pelaksanaan program karya tulis ilmiah; dan (3) peningkatan kualitas peserta didik dengan adanya program karya tulis ilmiah. Jenis penelitian yang digunakan adalah jenis penelitian lapangan (field research) atau penelitian kualitatif. Sasaran penelitian (subjek penelitian) ini adalah Kepala Madrasah, Wakil Kepala Madrasah Bidang Kesiswaan, dan guru yang menjadi pembimbing dan penguji Karya Tulis Ilmiah di MA Muhammadiyah 9 Lamongan. Teknik pengumpulan data yang digunakan adalah observasi, wawancara, dan dokumentasi. Teknik analisis data yang digunakan adalah teknik  analisis data Miles dan Huberman, yakni reduksi data, penyajian data, dan simpulan. Hasil penelitian menunjukkan bahwa: (1) Manajemen kesiswaan dalam implementasi program karya tulis ilmiah terdiri dari empat tahap, yakni perencaaan, pengorganisasian, pelaksanaan, dan pengendalian program karya tulis ilmiah; (2) kendala yang dihadapi dalam pelaksanaan program karya tulis ilmiah diantaranya adalah faktor siswa, faktor pembimbing, dan faktor fasilitas madrasah; (3) peningkatan kualitas siswa dengan adanya program karya tulis ilmiah dapat dilihat dari pengembangan penalaran peserta didik, terbentuknya mental peserta didik, dan penguasaan teknologi oleh peserta didik.
Centering Queer Latinx/a/o Experiences and Knowledge: Guidelines for using Jotería Studies in Higher Education Qualitative Research
Authors: Orozco Roberto C. , Gonzalez Sergio , Duran Antonio
Published: June 2021

The landscape of higher education research and practice on Queers of Color (QoC) is increasingly offering possibilities of research paradigms and frameworks that best articulate and capture the unique experiences of race, ethnicity, gender, and sexuality. And, as research on queer Latinx/a/o people in higher education increases, researchers and scholars need to utilize frameworks that attend to this community. Notably, Jotería Studies is a framework that centers the material realities of queer Latinx/a/o people (Hames-García, 2014). Jotería Studies as a research paradigm shifts the possibilities to intentionally speak to the experiences of the queer Latinx/a/o community. Therefore, the purpose of this manuscript is to offer guidelines for qualitative researchers to use Jotería Studies to study topics of higher education. Consequently, using these guidelines assist in examining the ways in which queer Latinx/a/o people are structurally marginalized in ways that speak to the intersections of race, ethnicity, gender, and sexuality.
Know Family, Know Self: Exploring the Influence of Family on Vietnamese American College Students’ Experiences
Authors: Lê Elaine N.Y. , Ramrakhiani Sonia H.
Published: June 2021

Much of the existing literature on Vietnamese Americans focuses on experiences of previous generations and does not capture the perspectives of the current generation of Vietnamese Americans, more specifically those who are college students. The present study examined the role of family influence on college experiences for Vietnamese American students. This study utilized qualitative methodology, analyzing data collected from semi-structured, in-person individual interviews conducted with six Vietnamese American college students (VACS) attending a large, predominantly white institution (PWI). Results from this study reveal not only how VACS construct meaning of their family influences and college experiences, but also how they come to understand their own Vietnamese American identity. Major findings from this study reveal that VACS exist between two worlds: the life of a second-generation immigrant Vietnamese American, and the life of an American college student. This article provides implications for higher education and student affairs practitioners to understand the unique experiences of this underrepresented and under-researched student population. Implications for further research are also discussed.
Lo común: reflexiones en torno a un concepto equívoco
Authors: Alvaro Daniel
Published: June 2021

Resumen Este artículo se propone reflexionar sobre las definiciones y teorías de lo “común” que alimentan los debates contemporáneos en torno a este concepto. Con ese objetivo se interrogan las obras de Christian Laval y Pierre Dardot, Michael Hardt y Antonio Negri, Jean-Luc Nancy y Roberto Esposito. Al analizar estos discursos queda en evidencia que lo que hoy se entiende por común, tanto desde un punto de vista filosófico como práctico-político, asume significados diferentes y muchas veces enfrentados entre sí. El artículo indaga los distintos significados y usos del concepto con el fin de demostrar que esta ambivalencia semántica es un factor decisivo para comprender los alcances y limitaciones del problema de lo común en el mundo actual.
Michel Houellebecq contra Michel Foucault: representações contemporâneas do Islã político na França
Authors: Costa Daniel Padilha Pacheco da
Published: June 2021

Resumo Nas entrevistas e artigos jornalísticos de Michel Foucault sobre a Revolução Iraniana, escritos do final de 1978 até meados de 1979, e no romance de antecipação política Submissão (2015), de Michel Houellebecq, ambos os autores parecem oferecer representações positivas do Islã político. Neste artigo, argumentamos que essa interpretação repousa sobre um duplo equívoco: embora Foucault não tenha cunhado a noção de espiritualidade política como alternativa para a crise dos sistemas políticos liberal e marxista, conforme seus críticos erroneamente o acusaram, mas como um conceito capaz de descrever as aspirações dos iranianos testemunhadas em suas viagens ao país, Houellebecq retomou, em Submissão, essa suposta representação positiva do Islã político pelo principal teórico da French Theory, com vistas a apresentar, ironicamente, a islamização como a solução para a crise econômica e sexual enfrentada pela sociedade francesa contemporânea e, assim, denunciar os herdeiros dessa representação como colaboracionistas.
Cibercultura e educação: pontos e contrapontos entre a visão de Pierre Lévy e David Lyon
Authors: Miranda Angela Luzia
Published: June 2021

Resumo: O artigo visa a confrontar o visível otimismo de Pierre Lévy sobre a cibercultura como espaço de produção da inteligência coletiva e da educação para a democratização social, com a postura crítica de David Lyon acerca da cultura da vigilância e seus efeitos sociopolíticos, na era da cibercultura. De cunho filosófico e qualitativo, cuja fonte de pesquisa é essencialmente bibliográfica, trata-se de um estudo comparativo que busca estabelecer as diferenças elementares entre a postura de Lévy e Lyon sobre a cibercultura. Em consequência, e reconhecendo as teses de Lyon sobre a ilusão do anonimato e os riscos do fim da privacidade, na era da cibercultura, o estudo termina por apontar alguns indicativos sobre as novas práticas educativas nesse contexto.
Isolation, fractionation and anticoagulant activity of a sulfated galactan extracted from the green algae Penicillus capitatus
Authors: Moreira Thamyris Almeida , Costa Bianca Barros da , Celestino Regina Célia Alves , Faria Caroline Nogueira , Gianelli Jéssica Lopes D’Dego , Santos Gustavo Ramalho Cardoso dos , Glauser Bianca Fernandes , Soares Angélica Ribeiro , Mourão Paulo Antônio de Souza , Rodrigues Carlos Rangel , Cinelli Leonardo Paes
Published: June 2021

ABSTRACT: Marine algae are natural sources of macromolecules known as sulfated polysaccharides. This class of compounds has attracted the interest of Pharmaceutical Sciences due to its pharmacological anticoagulant, antiplatelet and antithrombotic properties. Therefore, this study evaluated the anticoagulant potential of sulfated polysaccharides extracted from the algae Penicillus capitatus. The extracted sulfated polysaccharides were purified, partially characterized and their anticoagulant activity was evaluated. The extraction process followed by ethanol precipitation resulted in five fractions. Among the analyzed fractions, F44 contained highest concentration of sulfated polysaccharides. After the purified fraction F23, F44 displayed in vitro anticoagulant activity in a time testing for activated partial thromboplastin time and prothrombin time. The preferential mechanism effect was based on interactions between thrombin and factor Xa. Additional studies on structure pharmacological are required to test the viability of the use of sulfated polysaccharides as therapeutic agents.
Staphylococcal cassette chromosome mec elements from Staphylococcus intermedius group (SIG) isolates from dogs in a center for veterinary diagnostics in Brazil
Authors: Ruiz Regina , Barbosa Valcilaine Teixeira , Lôbo Teresa de Lisieux Guedes Ferreira , Silva Rafael Aleixo dos Santos , Calumby Rodrigo José Nunes , Vieira Suzanne Pinheiro , Brandão Diogo , Zorzi Felipe Mendes , Moreira Rossana Teotônio de Farias , Alvino Valter , Nascimento Ticiano Gomes do , Grilo Luciano Aparecido Meireles , Dornelas Camila Braga , Mamizuka Elsa Masae , Almeida Lara Mendes de
Published: June 2021

ABSTRACT: Methicillin resistance in the Staphylococcus intermedius group (SIG) has emerged in small animal practice. Methicillin-resistant SIG (MRSIG) members have been implicated as causes of infections in both companion animals and humans. Staphylococcal cassette chromosome mec (SCCmec) elements carry the mecA/C genes, which encode for the transpeptidase PBP2a (PBP2’) responsible for β-lactam antibiotic resistance in staphylococci. This study examined the SCCmec types of MRSIG isolates from different clinical specimens of dogs that exhibited methicillin MIC ≥ 0.5 μg/mL by an automated identification and susceptibility system in a Center for Veterinary Diagnostics in São Paulo, Brazil. Susceptibility to methicillin was determined by broth microdilution testing, and Oxoid® M.I.C.Evaluator® strips. PBP2a production was detected using a latex agglutination assay. SCCmec typing was performed according to the International Working Group on the Classification of Staphylococcal Cassette Chromosome Elements (IWG-SCC) guidelines. SCCmec type II (2A), SCCmec type III (3A), composite SCC structures consisting of a class A mec gene complex in addition to multiple ccr gene complexes, and non-typable SCCmec elements were reported in these MRSIG isolates. SCCmec type variants differing from those so far acknowledged by IWG-SCC were found, indicating new rearrangements in the genetic context of mecA in these canine MRSIG isolates.
A formação de professores do ensino elementar segundo a Comissão dos quinze: forma escolar e os saberes para ensinar
Authors: Rodriguês Jeremias Stein , Costa David Antonio da
Published: June 2021

RESUMO Ao fim do século XIX é proposto pela Comissão dos quinze uma reforma para o ensino elementar estadunidense, na qual se encontram também recomendações para a reestruturação da formação de professores naquele país. A partir da análise do relatório elaborado acerca deste tema, buscou-se caracterizar o modelo de forma escolar que se sobressai segundo a proposta, bem como identificar os saberes que deveriam servir de “ferramenta”, chamados aqui de saberes para ensinar, para os futuros professores norte-americanos. Deste modo, os conceitos de forma escolar (VINCENT; LAHIRE; THIN, 2001), saberes para ensinar (HOFSTETTER; SCHNEUWLY, 2017) e a objetivação de saberes se constituem como base teórica e metodológica neste trabalho. Por fim, foi possível observar que a proposta elaborada pela Comissão dos quinze para a formação de professores estabelece esta sobre dois eixos: teórica acadêmica e analítica prática. O primeiro eixo, ligado aos saberes das ciências, objeto do ensino, e dos saberes referentes aos processos pedagógicos, ao âmbito escolar e metodologias de ensino. Neste eixo são destacados saberes para ensinar já objetivados, adquiridos por estudos teóricos. O segundo eixo tem como foco a observação do “bom ensino” e da prática da docência, sendo em ambos momentos acompanhados pela orientação dos mais experientes. É possível inferir que tais saberes não poderiam ser transmitidos de outra forma, ressaltando assim um estágio ainda muito inicial de objetivação destes saberes.
Notícias da pré-escola no Distrito Federal: apontamentos de Yvonne Jean (1960-1964)
Authors: Barbosa Etienne Baldez L.
Published: June 2021

RESUMO Em abril de 1960 foi inaugurada a nova capital do Brasil, que continuou com obras posteriores, mas já tendo concretizado sua identidade de ser um símbolo de modernidade arquitetônica no país. Diversos brasileiros, acompanhados ou não de suas famílias, rumaram ao Distrito Federal, seja para serviços privados ou públicos. Nesse sentido, novas relações e vínculos familiares se constituíram e, com eles, o nascimento de crianças, fora as que vieram com os pais. Este trabalho investiga, pela ótica da jornalista Yvonne Jean, a organização dos jardins de infância, locais onde os pequenos, entre quatro e seis anos, recebiam educação institucionalizada. O recorte temporal compreende o ano da inauguração dos primeiros Jardins de Infância (1960), a chegada de Yvonne Jean à Brasília, com a publicação de sua coluna no jornal, com notícias sobre a educação (1962) e, ao final, o ano em que a jornalista é presa, acusada de compactuar com os ideais comunistas (1964).
Educação Infantil em museus de arte, ciência e história
Authors: Lopes Thamiris , Carvalho Cristina
Published: June 2021

RESUMO Este artigo resulta de uma pesquisa de doutorado que investigou o público de Educação Infantil em museus de arte, ciência e história1. Apresentamos parte dos achados da pesquisa no que se refere a como as crianças reagem a essa experiência. Para tanto, foi priorizada a abordagem de pesquisa qualitativa, com realização de pesquisa de campo em museus de tipologias distintas, localizados na cidade do Rio de Janeiro. Questionário online, observação, entrevista e análise documental foram utilizados como ferramentas metodológicas. A reflexão acerca da formação humana, pautada nas experiências em meio à cultura e às manifestações culturais, artísticas e estéticas teve como alicerce as perspectivas teóricas de autores da área da Educação, Infância, Estética e Museologia que contribuíram para o constructo teórico da pesquisa. Os resultados apontam que a experiência das crianças nos espaços museais se constitui na interação com outros (pares, mediadores, professores) e com as manifestações, registros e celebração das diferentes formas de viver e estar no mundo. Conclui-se que, por meio de mediações e ações educativas adequadas, os museus podem ser compreendidos enquanto meio – experimental e criativo – profícuo para promover às crianças o encontro com a cultura.
Nutritional response and clinical complications in patients with post-pyloric and gastric enteral tubes
Authors: OPSFELDER Leandro Augusto Kuhl , WENDT Guilherme Welter , SILVA Danilo Rodrigues Pereira da , MASSAROLLO Marina Daros , FERRETO Lirane Elize Defante , VIEIRA Ana Paula
Published: June 2021

ABSTRACT Objective The present study assessed the differences in nutritional markers (albumin, transferrin, total body fat, and body mass index) and clinical complications (diarrhea, vomiting, and diet interruptions) associated with enteral nutrition. Methods This is an open-label, randomized, two-arm parallel-group controlled clinical trial. Out of 105 patients assessed for eligibility, 35 adult patients were randomly divided into two groups and followed for 28 days. The sample comprised a heterogeneous group of severely ill individuals initially treated in the intensive care units. Neurological conditions (i.e., strokes and brain tumours) were the most common reasons for hospitalization. Patients had one singularity: the clinical need for exclusive enteral nutrition therapy. One group received the diet via gastric tube and the other via a post-pyloric tube. Results The groups presented increases in the calories prescribed and administered, as well as reduced diet discontinuation. Although similar values were observed up to day 21, the post-pyloric group showed increased albumin levels compared to the gastric group on Day 28. Transferrin levels increased over time in both groups. Conclusion There were no differences in the complications recorded between groups, albeit serum albumin significantly increased in the post-pyloric group.
The effects of 5-hydroxytryptophan on carrageenan-induced mouse paw oedemas
Authors: TELLI Gokçen , KAZKAYASI Inci , UMA Serdar
Published: June 2021

ABSTRACT Objective 5-Hydroxytryptophan is the precursor compound of serotonin biosynthesis. The oral absorption of 5-Hydroxytryptophan is close to 100% and, unlike serotonin, it crosses the blood-brain barrier freely. 5-Hydroxytryptophan has been used as a food supplement for many years to treat anxiety and depression. Recent studies have shown that 5-Hydroxytryptophan suppresses the pro-inflammatory mediators and is effective in some inflammatory diseases, such as arthritis and allergic asthma. However, the role of 5-Hydroxytryptophan supplements on acute peripheral inflammation has not been investigated yet. In this study, the in vivo anti-inflammatory activity of 5-Hydroxytryptophan was evaluated with a carrageenan-induced paw oedema test in mice. Methods For the investigation of the acute antiinflammatory activity, single oral doses of 5-Hydroxytryptophan (1.5, 5 and 20mg/kg) were given to mice 1.5 hours prior to the carrageenan test. For chronic activity, the same oral doses were administered daily for two weeks prior to the carrageenan test on the 14th day. To induce inflammation, 0.01mL of 2% carrageenan was injected into the paws of mice. Results Supplementation with 5-Hydroxytryptophan significantly reduced inflammation in a dose-independent manner which was irrespective of the duration of exposure (per cent inhibition in acute experiments was 35.4%, 20.9%, 24.0%, and per cent inhibition in chronic experiments was 29.5%, 35.3%, 40.8% for the doses of 1.5, 5, and 20mg/kg, respectively). Conclusion Our findings demonstrate for the first time that 5-HTP supplements have the potential of suppressing the measures of acute peripheral inflammation. It is suggested that, apart from several diseases where serotonin is believed to play an important role, including depression, patients with inflammatory conditions may also benefit from 5-HTP.
Efeito fotoelétrico: desenvolvimento de umexperimento quantitativo
Authors: Alves Esdras Garcia , Santos Andre Lucas Matthaeus
Published: June 2021

A experimentação é um aspecto importante das atividades voltadas para o ensino e a aprendizagem da física. Embora se possa discutir sobre as formas como ela é implementada em sala de aula, não há dúvidas que os experimentos constituem objetos mediadores relevantes nestas atividades. Contudo, há muito que as instituições de ensino sofrem com a dificuldade para adquirir experimentos, seja pelo agravamento dos cortes nas verbas destinadas às escolas públicas, seja pelo alto custo dos equipamentos fornecidos pelas empresas de materiais para laboratório. Diante dessas dificuldades e com a necessidade de melhor equipar o laboratório de física de nossa instituição, que atende a um curso de Licenciatura em Física, elaboramos um projeto que tem por objetivo o desenvolvimento de experimentos, principalmente para as áreas de eletromagnetismo e física moderna. Os experimentos são elaborados de modo a permitir demonstrações quantitativas dos fenômenos físicos a um custo bem menor que o de versões semelhantes encontradas no mercado. Neste trabalho compartilhamos as informações sobre a construção de um aparato experimental destinado ao estudo quantitativo do efeito fotoelétrico e apresentamos também os resultados que podem ser obtidos com tal aparato.
INFLUÊNCIA DA INFESTAÇÃO DE OLIGONYCHUS ILICIS (MCGREGOR, 1917) (ACARI: TETRANYCHIDAE) SOBRE A TAXA DE FOTOSSÍNTESE POTENCIAL DE FOLHAS DE CAFEEIRO
Authors: Franco R.A. , Reis P.R. , Zacarias M.S. , Altoé B.F. , Barbosa J.P.R.A.D.
Published: June 2021

RESUMO Oligonychus ilicis (McGregor, 1917) é um dos principais ácaros fitófagos do cafeeiro ( Coffea spp.), embora não esteja relacionado entre as pragas primárias. Esses ácaros vivem na superfície superior das folhas e, para se alimentar, perfuram as células da epiderme e do mesófilo e absorvem o conteúdo celular extravasado. Em consequência, as folhas perdem o brilho natural e tornam-se bronzeadas. O objetivo deste trabalho foi quantificar a taxa de fotossíntese de folhas de cafeeiro apresentando diferentes níveis de infestação de O. ilicis. O estudo foi realizado em plantas de cafeeiro (Coffea arabica L., cultivar Catuaí) envasadas e com três anos de idade, mantidas em casa de vegetação. Foram realizadas infestações em cinco diferentes níveis (0, 15, 30, 60 e 120 fêmeas adultas do ácaro/folha), com ácaros provenientes da criação de manutenção, em folhas do terceiro par, a partir do ápice e totalmente expandidas, localizadas em ramos do terço médio da planta, com cinco repetições. A medição da fotossíntese potencial foi realizada por meio do oxigênio fotossintético produzido, utilizando-se de um monitor de oxigênio com eletrodo tipo Clark acoplado a uma caixa de controle de fluxo elétrico CB1. As avaliações foram realizadas 7 e 21 dias após a infestação com os ácaros, e os dados obtidos foram submetidos a uma análise de regressão. Houve correlação negativa entre os diferentes níveis de infestação e a fotossíntese potencial, sendo que, nos níveis 15, 30, 60 e 120 ácaros/folha, as taxas de fotossíntese foram reduzidas, em relação ao tratamento-testemunha, em 37,2; 38,7; 46,0 e 50,1%, respectivamente.