bluuebunny/crossref_metadata_2025 huggingface dataset:
Adaptive Indexing of Objects with Spatial Extent
Authors: Zardbani Fatemeh , Mamoulis Nikos , Idreos Stratos , Karras Panagiotis
Published: July 2023

Can we quickly explore large multidimensional data in main memory?
Adaptive indexing
responds to this need by building an index incrementally, in response to queries; in its default form, it indexes a single attribute or, in the presence of several attributes, one attribute per index level. Unfortunately, this approach falters when indexing spatial data objects, encountered in data exploration tasks involving multidimensional range queries. In this paper, we introduce the Adaptive Incremental R-tree (AIR-tree): the first method for the adaptive indexing of non-point spatial objects; the AIR-tree incrementally and progressively constructs an in-memory spatial index over a static array, in response to incoming queries, using a suite of heuristics for creating and splitting nodes. Our thorough experimental study on synthetic and real data and workloads shows that the AIR-tree consistently outperforms prior adaptive indexing methods focusing on multidimensional points and a pre-built static R-tree in cumulative time over at least the first thousand queries.
TiQuE: Improving the Transactional Performance of Analytical Systems for True Hybrid Workloads
Authors: Faria Nuno , Pereira José , Alonso Ana Nunes , Vilaça Ricardo , Koning Yunus , Nes Niels
Published: July 2023

Transactions have been a key issue in database management for a long time and there are a plethora of architectures and algorithms to support and implement them. The current state-of-the-art is focused on storage management and is tightly coupled with its design, leading, for instance, to the need for completely new engines to support new features such as Hybrid Transactional Analytical Processing (HTAP). We address this challenge with a proposal to implement transactional logic in a query language such as SQL. This means that our approach can be layered on existing analytical systems but that the retrieval of a transactional snapshot and the validation of update transactions runs in the server and can take advantage of advanced query execution capabilities of an optimizing query engine. We demonstrate our proposal, TiQuE, on MonetDB and obtain an average 500x improvement in transactional throughput while retaining good performance on analytical queries, making it competitive with the state-of-the-art HTAP systems.
Cracking-Like Join for Trusted Execution Environments
Authors: Maliszewski Kajetan , Quiané-Ruiz Jorge-Arnulfo , Markl Volker
Published: July 2023

Data processing on non-trusted infrastructures, such as the public cloud, has become increasingly popular, despite posing risks to data privacy. However, the existing cloud DBMSs either lack sufficient privacy guarantees or underperform. In this paper, we address both challenges (privacy and efficiency) by proposing CrkJoin, a join algorithm that leverages Trusted Execution Environments (TEE). We adapted CrkJoin to the architecture of TEEs to achieve significant improvements in latency of up to three orders of magnitude over baselines in a multi-tenant scenario. Moreover, CrkJoin offers at least 2.9x higher throughput than the state-of-the-art algorithms. Our research is unique in that it focuses on both privacy and efficiency concerns, which has not been adequately addressed in previous studies. Our findings suggest that CrkJoin makes joining in TEEs practical, and it lays a foundation towards a truly private and efficient cloud DBMS.
Improvement in soccer goalkeepers’ spatial anticipation during penalty kicks as a result of PETTLEP imagery intervention
Authors: Amini Farsani Mehdi , Shahbazi Mehdi , Tahmasebi Boroujeni Shahzad
Published: July 2023

Objectives

This examined the effect of PETTLEP imagery on the spatial anticipation of novice soccer goalkeepers during penalty kicks.

Methods

Twenty-four adolescent male goalkeepers (Meanage: 14.14 ± 1.10) were selected and divided randomly into two groups. In the pretest, the goalkeepers responded to 12 video stimuli to evaluate spatial anticipation. The goalkeepers in the experimental group listened to the audio file of the PETTLEP imagery for 6 sessions where the control group was engaged in goalkeeper training only.

Results

Results showed the group under PETTLEP imagery intervention had a significant difference from the control group in post-test (p=0.004).

Conclusions

6 sessions PETTLEP Imagery intervention has improved anticipation of novice goalkeepers during penalty kicks.
Observation of ultra-large Rabi splitting in the plasmon-exciton polaritons at room temperature
Authors: Zhang Min , Tian Yuan , Chen Xingzhou , Sun Zheng , Zhu Xiaolong , Wu Jian
Published: July 2023

Modifying the light–matter interactions in the plasmonic structures and the two-dimensional (2D) materials not only advances the deeper understanding of the fundamental studies of many-body physics but also provides the opportunities for exploration of novel 2D plasmonic polaritonic devices. Here, we report the plasmon-exciton coupling in the hybrid system with a plasmonic metasurface which can confine the electric field in an extremely compact mode volume. Because of the 2D feature of the designed and fabricated Al plasmonic metasurface, the confined electronic field is distributed in the plane with the same orientation as that of the exciton dipole moment in the transition metal dichalcogenides monolayers. By finely tuning the geometric size of the plasmonic nanostructures, we can significantly modify the dispersion relation of the coupled plasmon and the exciton. Our system shows a strong coupling behavior with an achieved Rabi splitting up to ∼200 meV at room temperature, in ambient conditions. The effective tailoring of the plasmon-exciton coupling with the plasmonic metasurfaces provides the testing platform for studying the quantum electromagnetics at the subwavelength scale as well as exploring plasmonic polariton Bose–Einstein condensation at room temperature.
Montreal soundscapes during the COVID-19 pandemic: A spatial analysis of noise complaints and residents’ surveys
Authors: Trudeau Christopher , Tarlao Cynthia , Guastavino Catherine
Published: July 2023

Public health measures during the COVID-19 pandemic provided researchers with a quasi-experimental situation to examine what happens when anthropogenic noise sources (e.g., traffic) are greatly reduced. This article combines noise-related calls to Montreal’s 311 service (29,891 calls from 2014 to 2022) with original survey data from 240 residents collected in 2020 after the lockdown and the summer reopening. The spatial analysis of the calls revealed that, across all pandemic phases, noise complaints increased with population density, the proportion of low-income residents, and the proportion of greenspace. However, the change in the spatial distribution of noise-related calls due to the pandemic measures is positively associated with the proportions of residential and greenspace land use. That is, areas with higher proportions of residential land use and greenspace experienced the greatest increase in noise-related calls. The analysis of the survey revealed that the sounds of traffic and construction decreased during both the lockdown and the subsequent reopening, while the sounds of the neighborhood and nature increased. However, the decreased traffic noise in the downtown core also allowed for the emergence of noise from the heating, ventilation and air conditioning systems in the area. We discuss these results considering the interest in reducing noise levels in cities.
Application of waste recycle tire steel fibers as a construction material in concrete
Authors: Amin Muhammad Nasir , Khan Kaffayatullah , Nazar Sohaib , Deifalla Ahmed Farouk
Published: July 2023

A bulk volume of waste tires, an underrated global resource, is disposed of in landfills worldwide. Extracting recycled steel fibers from these tires is an evolving trend nowadays. The outcomes of concrete having steel fibers sourced from end-of-life tires are alike industrial steel fibers. Accordingly, the attention of researchers is focused nowadays on using alternative recycled steel fibers in place of industrial steel fibers in concrete. In the current study, the review focuses on waste recycle tire steel fiber (WRTSF)-reinforced concrete applications, considering different lengths and contents for finding the research gap in this research domain. The results and methods to recycle WRTSFs in existing studies are compiled and briefed. The adoption of appropriate composition and characteristics like length, diameter, content, etc., of WRTSFs can be made by using this study to improve the mechanical properties of respective composites. Therefore, the aim of this evaluation is to encourage the application of concrete reinforced with WRTSF for different construction purposes, including but not limited to pavements, tunnel linings, bridge decks, hydraulic structures, and slope stabilization. The study seeks to provide guidance on the appropriate composition and characteristics of WRTSFs to improve the mechanical properties of the composite material.
On the Origin of Hemoglobin Cooperativity under Non-equilibrium Conditions
Authors:   Department of Clinical and Experimental Medicine, University of Foggia, Via L. Pinto 1, Foggia, Italy, Scrima Rosella , Fugetto Sabino ,   Department of Clinical and Experimental Medicine, University of Foggia, Via L. Pinto 1, Foggia, Italy, Capitanio Nazzareno ,   Department of Clinical and Experimental Medicine, University of Foggia, Via L. Pinto 1, Foggia, Italy, Gatti Domenico L. ,   Department of Biochemistry, Microbiology and Immunology, Wayne State University School of Medicine, 540 E. Canfield Avenue, Detroit, MI, USA
Published: July 2023

Abnormal hemoglobins can have major consequences for tissue delivery of oxygen. Correct diagnosis of hemoglobinopathies with altered oxygen affinity requires a determination of hemoglobin oxygen dissociation curve, which relates the hemoglobin oxygen saturation to the partial pressure of oxygen in the blood. Determination of the oxygen dissociation curve of human hemoglobin is typically carried out under conditions in which hemoglobin is in equilibrium with O2 at each partial pressure. However, in the human body due to the fast transit of red blood cells through tissues hemoglobin oxygen exchanges occur under nonequilibrium conditions. We describe the determination of non-equilibrium oxygen dissociation curve and show that under these conditions the true nature of hemoglobin cooperativity is revealed as emerging solely from the consecutive binding of oxygen to each one of the four subunits of hemoglobin until the entire tetramer is saturated. We call this form of cooperativity the sequential cooperativity of hemoglobin and define the simplest model that includes it as the minimalist model of hemoglobin. A single instantiation of this model accounts for ~70% of hemoglobin cooperativity under non-equilibrium conditions. The total cooperativity of hemoglobin can be viewed more correctly as the summation of two instantiations of the minimalist model (each one corresponding to a tetramer of low and high affinity for O2, respectively) in equilibrium with each other, as in the Monod-Wyman-Changeux model of hemoglobin. In addition to offering new insights on the nature of hemoglobin reaction with oxygen, the methodology described here for the determination of hemoglobin non-equilibrium oxygen dissociation curve provides a simple, fast, low-cost alternative to complex spectrophotometric methods, which is expected to be particularly valuable in regions where hemoglobinopathies are a significant public health problem, but where highly specialized laboratories capable of determining a traditional oxygen dissociation curve are not easily accessible.
A ALFABETIZAÇÃO EM TEMPOS DE PANDEMIA
Authors: Tassoni Elvira Cristina Martins , Brito Antonia Edna
Published: July 2023

Este artigo tem o objetivo de apresentar e problematizar o vivido por professores durante a experiência do ensino remoto emergencial e do retorno presencial, parcial e total às aulas. O recorte focaliza os estados do Piauí e de São Paulo. A pesquisa está composta por duas fases, articulando dados quantitativos e qualitativos, por meio de questionário e grupos focais. A primeira, explorando o ensino remoto, contou com 1.467 respondentes nos dois estados. A segunda explora o retorno presencial e está em andamento. As conclusões destacam as condições de trabalho, as reduzidas oportunidades de experiências com a escrita, e os limites da mediação pedagógica.
NARRATIVAS DE GESTORES ESCOLARES DE ESCOLAS DO CAMPO EM TEMPO DE PANDEMIA DE COVID-19
Authors: Pasinato Darciel , Silva Fabiana Regina da , Reis Cristiane Medianeira da Silva
Published: July 2023

O presente artigo tem como objetivo analisar as narrativas autobiográficas de gestores escolares das Escolas Aníbal Magni e Frei Anselmo em tempos de pandemia de Covid-19, instituições localizadas no interior do município de Selbach no norte do Rio Grande do Sul, Brasil. Os dados da discussão a partir das narrativas foram construídos com entrevistas semiestruturadas, valendo-se da perspectiva teórico-metodológica da pesquisa autobiográfica, sendo analisados e discutidos em uma abordagem qualitativa. O contexto pandêmico trouxe desafios para a escola e a educação escolar, colocando-a a par de necessidades novas, desafiando professores e gestores.
RAB11A and RAB11B control mitotic spindle function in intestinal epithelial progenitor cells
Authors: Joseph Ivor , Flores Juan , Farrell Victoria , Davis Justin , Bianchi‐Smak Jared , Feng Qiang , Goswami Sayantani , Lin Xiang , Wei Zhi , Tong Kevin , Feng Zhaohui , Verzi Michael P , Bonder Edward M , Goldenring James R , Gao Nan
Published: July 2023

RAB11 small GTPases and associated recycling endosome have been localized to mitotic spindles and implicated in regulating mitosis. However, the physiological significance of such regulation has not been observed in mammalian tissues. We have used newly engineered mouse models to investigate intestinal epithelial renewal in the absence of single or double isoforms of RAB11 family members: Rab11a and Rab11b. Comparing with single knockouts, mice with compound ablation demonstrate a defective cell cycle entry and robust mitotic arrest followed by apoptosis, leading to a total penetrance of lethality within 3 days of gene ablation. Upon Rab11 deletion ex vivo, enteroids show abnormal mitotic spindle formation and cell death. Untargeted proteomic profiling of Rab11a and Rab11b immunoprecipitates has uncovered a shared interactome containing mitotic spindle microtubule regulators. Disrupting Rab11 alters kinesin motor KIF11 function and impairs bipolar spindle formation and cell division. These data demonstrate that RAB11A and RAB11B redundantly control mitotic spindle function and intestinal progenitor cell division, a mechanism that may be utilized to govern the homeostasis and renewal of other mammalian tissues.
Cancer in growth hormone excess and growth hormone deficit
Authors: Guevara-Aguirre Jaime , Peña Gabriela , Acosta William , Pazmiño Gabriel , Saavedra Jannette , Soto Lina , Lescano Daniela , Guevara Alexandra , Gavilanes Antonio W D
Published: July 2023

The relationship between growth hormone (GH) excess and cancer is a controversial matter. Until 2016, most studies in patients with acromegaly found links with colon and thyroid neoplasms. However, recent studies found increased risks in gastric, breast, and urinary tract cancer also. Concordantly, clinical situations where GH and insulin-like growth facto-I deficits exist are indeed associated with diminished malignancy incidence. In line with these observations, gain-of-function mutations of various enzymes belonging to the GH and IGF-I signaling pathways have been associated with increased carcinogenesis; similarly, loss-of-function mutations of other enzymes that usually work as tumor repressors are also associated with augmented cancer risk. In a study performed in Ecuador, it was demonstrated that subjects in the Ecuadorian cohort with Laron syndrome (ELS), who have a mutant GH receptor and greatly diminished GH and IGF-I signaling, display diminished incidence of cancer. Along with absent action of GH and IGF-I, ELS individuals also have low serum insulin levels and decreased insulin resistance. Furthermore, hyperglycemia and hyperinsulinemia are indispensable for fast cell mitosis, including that of those cells present in the benign and malignant neoplasms. Notably, and despite their obesity, subjects with the ELS display normoglycemia and hypo-insulinemia, along with diminished incidence of malignancies. We believe that the dual low-IGF-I/low insulin serum levels are responsible for the cancer protection, especially considering that the insulin/INSR signaling is a central site for energy generation in the form of ATP and GDP, which are indispensable for all and every GH/IGF-I physiologic as well as pathologic events.
Propuestas de actividades para el estudio de la distribución geográfica de los suelos
Authors: Molina Condú Yilian , Carrillo Menocal Héctor , Díaz Garriz Diana Rosa , Vazquez Quintana Lisbet Catalina
Published: July 2023

La Geografía como ciencia, estudia la relación de disimiles hechos, fenómenos y procesos que se llevan a cabo en el espacio geográfico, contribuyendo a la formación de una cultura geográfica, que fomente visiones integradoras de la realidad. El presente artículo tiene como propósito la propuesta de actividades que permitan explicar la distribución geográfica de los suelos en el proceso de enseñanza aprendizaje de la Geografia en décimo grado, lo cual posibilitará adquirir conocimientos que permitan explicar los hechos fenómenos y procesos que le rodean, desarrollen habilidades y se apropien de modos de actuación responsables.  Se utilizaron los métodos y técnicas de investigación: inductivo-deductivo, analítico-sintético, el análisis de documentos, la entrevista, el criterio de especialistas y la triangulación de datos.
Can lignocellulosic biosynthesis be the key to its economical deconstruction?
Authors: Lucia Lucian A. , Hubbe Martin A.
Published: July 2023

It is ironic to think that the venerable pulp and paper industry is now considering ways to degrade cellulose. This notion can be understood as a way that the industry can face a protracted downturn in profitability and ever-mounting socio-economic pressures to enhance the efficiency of biofuels production. Many approaches have been recently taken to deconstruct cellulosic biomass, but this Editorial explores one key that may start to explain the increasing momentum in the biofuels community – biotechnology. Two approaches appear to be possible as scientists search for an effective way to unzip cellulose to its key constituents through the use of biotechnology. On the one hand, there are efforts to re-engineer the chemical composition of the tree, rendering it more digestible by enzymes and decreasing the need for mechanical or chemical pretreatment. On the other hand, what we are learning about lignocellulose biosynthesis can be of potential help in designing more efficient systems to essentially reverse that process.
An evolution from pretreatment to fractionation will enable successful development of the integrated biorefinery
Authors: Bozell Joseph J.
Published: July 2023

The current state of biorefinery development is focused almost entirely on the production of fuel ethanol. However, an ethanol-centric approach misses the crucial example set by the petrochemical industry. The ability to fractionate a raw material, rather than simply pretreating it, enables the parallel production of low value, high volume fuels and high value, low volume chemicals. By developing analogous fractionation processes for biomass, giving separate process streams of cellulose, hemicellulose and lignin, the biorefining industry will be able to recognize the synergistic advantages of producing both energy and profits.
Determination of potash alkali and metal contents of ashes obtained from peels of some varieties of Nigeria grown Musa species
Authors: Babayemi Joshua O. , Dauda Khadijah T. , Kayode Abideen A.A. , Nwude Davies O. , Ajiboye John A. , Essien Enobong R. , Abiona Olufunmilayo O.
Published: July 2023

Potash alkali and metal contents of ashes obtained from peels of six varieties of Nigeria Musa species were investigated. The varieties of Musa species – Musa paradisiaca (plantain), Musa ‘Gross Michel’ (Igbo banana), M.sapientum L. (paranta), Musa ‘Wild Banana’ (omini), Musa ‘Red’ (sweet banana), and Musa ‘Fugamo’ (somupeke), were investigated. The moisture, dry matter, ash and alkali contents; concentration of metals in the ashes and in the contents extracted with water from the ashes; and the ratio of potassium to other metals in the ashes and in the corresponding extracts were determined. Moisture contents ranged from 80.9 to 86.7%; dry matter content, 13.3 to 19.1%; ash content, 6.3 to 12.0%; alkali content, 69.0 to 81.9% of ash and 4.7 to 9.6% of dry sample. Samples ranged between 2.60 and 720mg/kg and in the corresponding extracts, BDL to 500.49mg/kg; ratio of concentration of potassium to other metals in the samples, 0.6 to 395; and in the extracts, 0.5 to 313. Gross michel showed the highest concentration of K (750mg/kg) while omini banana gave the lowest average value (112.70mg/kg).
Preparation of biodegradable flax shive cellulose-based superabsorbent polymer under microwave irradiation
Authors: Feng Hao , Li Jian , Wang Lijuan
Published: July 2023

Superabsorbent polymer was prepared by graft polymerization of acrylic acid onto the chain of cellulose from flax shive by using potassium persulfate (KPS) as an initiator and N,N’-methylenebisacrylamide (MBA) as a crosslinker under microwave irradiation. SEM photographs were also studied for more information about the shive, cellulose from shive, and the superabsorbent polymer. The structure of the graft copolymer was confirmed by FT-IR spectroscopy and thermogravimetric analysis (TGA). The biodegradability in soil was measured at 32 and 40 oC. The polymer was porous, and thermal stability of the polymer was observed up to approximately 200 oC. FT-IR analysis indicated that acrylic acid in polymer was successfully grafted onto the cellulose. The graft copolymer was found to be an effective superabsorbent resin, rapidly absorbing water to almost 1000 times its own dry weight at pH around 7.3. The water absorbency in 0.9% NaCl, KCl, FeCl3 solutions and urine were 56.47 g/g, 54.71g/g, 9.89g/g and 797.21g/g, respectively. The product biologically degraded up to 40% at 40 oC in 54 days, which shows good biodegradability.
Technological evaluation of carboxymethyl sesbania galactomannan gum derivatives as thickeners in reactive printing
Authors: Rekaby Manal Moustafa , El-Thalouth Ibrahim Abd , Rahman Adel A. H. , El-Khabery Shabaan Abd El-Satar
Published: July 2023

Galactomannan gum isolated from the seeds of sesbania was subjected to chemical modification via carboxymethylation in non-aqueous medium using monochloroacetic acid under the catalytic action of sodium hydroxide. The obtained derivatives were subjected to measuring the degrees of substitution (D.S.), rheological properties of their pastes, and evaluated as thickeners in printing cotton fabrics with reactive dyes. Highly substituted derivatives could be used successfully as thickening agents in printing cotton fabrics either alone or in admixture with sodium alginate. Prints acquire soft handle, colour strength (K/S), and fastness properties nearly identical to corresponding samples that were printed using sodium alginate.
Evaluation of linerboard properties from Malaysian cultivated kenaf soda-anthraquinone pulps versus commercial pulps
Authors: Mossello Ahmad Azizi , Harun Jalaluddin , Ibrahim Rushdan , Resalati Hossein , Shamsi Seyed Rashid Fallah , Tahir Paridah Md , Yusoff Mohd Nor Mohad
Published: July 2023

Malaysian cultivated kenaf has been identified as a suitable raw material for linerboard production. This study examines the soda-antraquinone (soda-AQ) pulp of kenaf fibers versus old corrugated container (OCC) and unbleached softwood kraft pulps as the main sources for linerboard production. The results showed significant differences among the pulp properties. The unbleached kraft pulp with very high freeness required high beating to reach an optimized freeness and produced paper with the highest strength properties, except for tear resistance. The OCC gave paper with the lowest strength properties. In the case of kenaf fractions, bast pulp with high freeness needed less beating than softwood and produced paper with high tear resistance. Core fiber, which had the lowest freeness and highest drainage time, led to paper with high strength but very low tear resistance. Kenaf whole stem pulp showed intermediate properties between core and bast and close to those of unbleached softwood pulp, but with very lower beating requirement. Finally, kenaf whole stem, due to its strength properties, moderate separation cost, and simple pulping process, was judged to be more suitable for commercialization for linerboard production in Malaysia.
Replacement of softwood kraft pulp with ECF-bleached bamboo kraft pulp in fine paper
Authors: Zhao Guanglei , Lai Ronald , He Beihai , Greschik Thomas , Li Xiaofeng
Published: July 2023

Non-wood fibers such as bamboo and wheat straw have been playing important roles in the pulp and paper industry in China. In this study an ECF-bleached bamboo kraft pulp was compared with a bleached softwood kraft pulp (NBSK) as the reinforcement pulp in fine paper production. Areas that were examined include the refining of pure fibers, influence of bamboo on dewatering, retention, and sizing. The influence of bamboo kraft pulp as a part of a furnish replacing NBSK was compared as well. Results show that fiber shortening was more prominent with bamboo when refined. This resulted in a higher amount of fines, and addition wet-end chemicals may be required to compensate. Handsheets with bamboo as a reinforcement fiber showed similar mechanical and optical properties to handsheets containing NBSK.
Effect of pine cone ratio on the wettability and surface roughness of particleboard
Authors: Buyuksari Umit , Avci Erkan , Ayrilmis Nadir , Akkilic Huseyin
Published: July 2023

In this study, the effect of pine cone ratio on wettability and surface roughness of particleboards was examined. Contact angles of water on the produced samples were measured with a goniometer. The surface roughness of the samples was determined with a fine stylus tracing technique. Particleboards made from 100% wood particle had the lowest average contact angle (95.6°), but the highest was for the particleboards containing 50% pine cone (116.3°). Average surface roughness was higher for samples containing a higher amount of pine cone in the mixture. The smoothest surface (9.77 μm Ra) was observed when panels were produced using 100% wood particles. On the other hand, the roughest surface (15.50 μm Ra) was found for the samples containing 50% cone particles in the mixture. Rmax and Rz parameters had similar trends to the Ra values. Increasing the pine cone ratio in the mixture negatively affected the contact angle and surface roughness parameters of the particleboard.
Liquid crystalline behavior of hydroxypropyl cellulose esterified with 4-alkoxybenzoic acid
Authors: El-Wakil Nahla A. , Fahmy Yehia , Abou-Zeid Ragab E. , Dufresne Alain , El-Sherbiny Samya
Published: July 2023

A series of 4- alkyoxybenzoyloxypropyl cellulose (ABPC-n) samples was synthesized via the esterification of hydroxypropyl cellulose (HPC) with 4-alkoxybenzoic acid bearing different numbers of carbon atoms. The molecular structure of the ABPC-n was confirmed by Fourier transform infrared (FT-IR) spectroscopy and 1H NMR spectroscopy. The liquid crystalline (LC) phases and transitions behaviors were investigated using differential scanning calorimetry (DSC), polarized light microscopy (PLM), and refractometry. It was found that the glass transition (Tg) and clearing (Tc) temperatures decrease with increase of the alkoxy chain length. It was observed that the derivatives with an odd number of carbon atoms are non-mesomorphic. This series of ABPC-n polymers exhibit characteristic features of cholesteric LC phases between their glass transition and isotropization temperatures.
Factors Supporting Workplace Learning in Vietnam
Authors: Hai Nguyen Thi , Xuan Bui Thanh , Oanh Duong Thi , Thu Nguyen Hoai , Thanh Pham Van
Published: July 2023

Learning in the workplace is a fundamental component of lifelong learning, valuable and significant for both employees and employers. Learning in the workplace helps employees improve their skills, qualifications, and labor productivity. Learning in the workplace also contributes to a culture of lifelong learning. In Vietnam, there have only been small-scale studies on the workplace learning activities of each group of learners.  However, in each field and industry, there have been no direct studies on factors supporting learning in the workplace. This article has researched factors that support the workplace learning of cadres, civil servants, public employees, and employees in organizations in Vietnam. The paper conducts an overview of existing work to identify and focus research on four factors that support learning in the workplace with nine basic variables. From there, a survey of employees who have regularly studied at work in different fields, and organizations. Through the processing and analysis of survey results, this study uncovered several important issues about factors supporting workplace learning. This study found that: organizations already have factors that support learning in the workplace; Workers evaluate supporting variables to varying degrees. Besides, the level of support for these factors is different between organizations as well as localities. These results have great practical significance, helping employers have plans and policies to improve the quality of workplace learning
Endocrowns – a literature review
Authors: Ciobanu Paul , Manziuc Manuela-Maria , Buduru Smaranda Dana , Dudea Diana
Published: July 2023

Introduction. The opportunity of using Endocrown-type restorations in the current prosthetic dentistry practice as an alternative to other, well-established methods of corono-radicular restorations and the evolving palette of adhesive materials has made these restorations more popular in the last few years.

Objective. The purpose is to review the available literature about Endocrown restorations regarding mechanical properties – fracture strength and resistance, survival rate, the preparation design – marginal and internal adaptation, and esthetics.

Method. The search was carried out on four databases: PubMed, Scopus (ScienceDirect), Web of Science, and Scielo using the following terms: ”endocrowns”, ”endodontic crown”, and” no buildup crown”. Initially, a total of 163 articles published between 2015 and May 2021 were selected. After the duplicates, papers presented only as abstracts, articles in any other languages except English, and review articles were eliminated; a total of 72 articles remained to be considered for this review.

After assessing the 72 considered articles, 37 were chosen as fit for this review. The reasons for the elimination of the other 35 articles were: their main focus was other than endocrowns, e.g., direct restorations, indirect restorations of vital teeth; case reports; study protocols.

Results. From the 37 articles selected, 34 were focused on mechanical properties, including the influence of the preparation design, and three on survival rate, of which one also had a point of view regarding esthetics.

Conclusions. The literature included in this review shows that endocrowns perform similarly or even better in some cases than other coronal restorations. However, this statement must be interpreted cautiously, given that most articles were in vitro or finite element analysis studies. Given the high degree of conflicting results found in the articles included in this review, the authors consider as reasonable to conclude that further studies are needed to confirm the feasibility of endocrowns and the best choice of material.
Online Robotics Activities During the Pandemic Period – Challenges and Experiences
Authors: GAÁL Bence
Published: July 2023

The situation caused by the Covid-19 made it impossible to keep our traditional inperson summer camps and activities, so our university decided to hold the sessions online. Thus,
enthusiastic students aged 13–16 were able to participate in robotics sessions that were fully implemented in the online space. In the article, we want to present the experiences and challenges of these sessions, as well as the way of implementation and the range of tools needed for it.
Change Management in Preparing Indonesian Team to IOI
Authors: JINGGA Felix , ISAL Yugo K. , CENDRANATA Andreas , LIEM Inggriani , MULYANTO Adi
Published: July 2023

Indonesia has been participating at the International Olympiad in Informatics (IOI)
since 1995. The process of selecting the four contestants remains unchanged. All medalists in the national level competition were invited to take a series of training camps to select competitively the candidates. In the first two decades of participation in IOI, Indonesia have collected two gold medals, and these surprising achievements were merely more because of luck, and not as a result of a reliable training/selection process. We believe reliable and good training is a basis to predict and expect a stable achievement. Through careful observations and reflections, a change of course of action is needed to bring Indonesia’s achievement to the next level. This paper shares Indonesia’s experience in changing and implementing strategies during the national training camps to better prepare the four contestants to IOI. What are the changes taken by the coaching team that have been exercised that made it possible for Indonesia to achieve three gold in the last four consecutive years?
Guide to Teaching Data Science: An Interdisciplinary Approach
Authors: HAZZAN Orit , MIKE Koby
Published: July 2023

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Comparision protocols for extraction of microplastics in water samples
Authors: Dinh Hai Ngoc , Duong Thanh Nghi , Cao Thi Thanh Nga , Le Thi Phuong Quynh , Doan Thi Oanh , Nguyen Trung Kien , Duong Thi Thuy
Published: July 2023

Microplastics (MPs) are increasingly recognized as emerging pollutants in various environmental components. However, protocols for sampling, analysis, and standardization of measurements in MPs research are still under development. The extraction method is a crucial factor that affects the accuracy and comparability of microplastic abundance data. In this study, we evaluated and compared the effectiveness of four different extraction protocols (D, MJ, MA, and S) for separating MPs from water samples of different types (brackish, marine, and river water). Known combinations of MP particles (polyethylene (PE), polyethylene terephthalate (PET), polystyrene (PS), and polyvinyl chloride (PVC)) with sizes ranging between 150 μm and 700 μm were spiked into water samples. Our results showed that the average recovery efficiency of microplastics using the four studied methods ranged from 53% to 86%. Notably, the recovery efficiency of light-density MPs was higher than that of heavy-density MPs. For purified water samples (PW) obtained from a filtration system, only H2O2 was effective in recovering MPs with an efficiency of 80 ± 6.61%. The S method for MP extraction, which combines SDS, Bioenzyme, H2O2 30%, and a saturated salt solution using NaCl, gave the highest average MP recovery of 78.13 ± 2.39% in PW and 69.72 ± 4.81% in surface water. This method has several advantages over the other three methods, such as low cost, environmental friendliness, and compatibility with various water samples, making it suitable for analyzing large amounts of MPs. Our study highlights the importance of carefully selecting the appropriate extraction protocol for accurate and reliable microplastic analysis in different water samples.
Occurrence and preventability of adverse events in hospitals: a retrospective study
Authors: Lima Júnior Antônio José de , Zanetti Ariane Cristina Barboza , Dias Bruna Moreno , Bernardes Andrea , Gastaldi Francielly Marques , Gabriel Carmen Silvia
Published: July 2023

ABSTRACT Objectives: to analyze the incidence of preventable adverse events related to health care in adult patients admitted to public hospitals in Brazil. Methods: observational, analytical, retrospective study based on medical records review. Results: medical records from 370 patients were evaluated, 58 of whom had at least one adverse event. The incidence of adverse events corresponded to 15.7%. Adverse events were predominantly related to healthcare-related infection (47.1%) and procedures (24.5%). Regarding the adverse event severity, 13.7% were considered mild, 51.0% moderate, and 35.3% severe. 99% of adverse events were classified as preventable. Patients admitted to the emergency room had a 3.73 times higher risk for adverse events. Conclusions: this study’s results indicate a high incidence of avoidable adverse events and highlight the need for interventions in care practice.
Correlação entre sintomas de depressão, atitude e autocuidado em idosos com diabetes tipo 2
Authors: Frazão Maria Cristina Lins Oliveira , Viana Lia Raquel de Carvalho , Ferreira Gerlania Rodrigues Salviano , Pimenta Cláudia Jeane Lopes , Silva Cleane Rosa Ribeiro da , Madruga Kaisy Martins de Albuquerque , Batista Patrícia Serpa de Souza , Costa Kátia Neyla de Freitas Macedo
Published: July 2023

RESUMO Objetivos: correlacionar sintomas depressivos, atitude e autocuidado de pessoas idosas com diabetes tipo 2. Métodos: estudo desenvolvido com 144 pessoas idosas com diabetes; realizado em Unidades de Saúde da Família. Utilizaram-se instrumento semiestruturado para obter os dados referentes ao perfil sociodemográfico, a Escala de Depressão Geriátrica (15 itens), o Questionário de Atitudes Psicológicas do Diabetes e o de Atividades de Autocuidado com o Diabetes. Resultados: identificou-se que 24,3% dos participantes apresentaram sintomatologia depressiva; e 93,8%, atitudes negativas de enfrentamento. Observou-se uma maior adesão às atividades de autocuidado relacionadas à prática medicamentosa. Na correlação entre as escalas, foi percebida uma correspondência negativa e inversamente proporcional entre sintomatologia depressiva e atividade física (p=0,010) e cuidado com os pés (p=0,006), do mesmo modo entre atitude e cuidado com os pés (p=0,009). Conclusões: o autocuidado em pessoas idosas com diabetes mellitus sofre influência dos sintomas depressivos e da atitude negativa no enfrentamento.
Acompanhamento da utilidade e valor do cateter de quimioterapia totalmente implantável em 233 pacientes brasileiros que receberam quimioterapia para tratar o câncer
Authors: CÉSAR RODRIGO MELO , LAGE ANA P. DRUMMOND , WAINSTEIN ALBERTO
Published: July 2023

RESUMO Objetivos: avaliar pacientes com câncer em relação ao fluxo do cateter e a satisfação geral desses pacientes. Métodos: estudo retrospectivo avaliando prontuários de 233 indivíduos com diagnóstico de câncer que realizaram tratamento quimioterápico por acesso venoso por portocath entre janeiro de 2015 e dezembro de 2019. Resultados: 97% dos pacientes realizaram quimioterapia paliativa, e 99,1% dos pacientes relataram satisfação com o processo de implantação e método de tratamento. Em relação ao fluxo do cateter de acordo com o retorno venoso e gotejamento durante a infusão da droga, 98,7% dos indivíduos apresentaram bom fluxo. Conclusões: os resultados mostram que o fluxo do cateter foi satisfatório em todos os locais de implante observados e enfatizam as vantagens do uso de um cateter totalmente implantado. Esse benefício acontece devido à redução de fatores emocionais que causam estresse em pacientes oncológicos em tratamento quimioterápico, bem como a redução de traumas e desconfortos vivenciados pelos pacientes durante a infusão de quimioterápicos periféricos.
Análise bibliométrica e taxa de conversão de resumos apresentados no Congresso Brasileiro de Coloproctologia em publicação de artigos completos
Authors: SAMARTINE JUNIOR HUGO , PAIVA DANIEL FERREIRA , GRACITELLI GIOVANNA BERTAZZOLA , MAZZINI LUCAS ROSASCO , LEVY NICOLE GOLDENBERG , AQUINO JOSE LUIS BRAGA , MENDES ELISA DONALISIO TEIXEIRA
Published: July 2023

RESUMO Introdução: a apresentação de pesquisas em um congresso é meio interessante para disseminação científica, porém apenas com a publicação em revista indexada é que os dados se tornam acessíveis e disseminados. A taxa de conversão em artigos publicados de resumos apresentados em congressos é um indicador para avaliar a qualidade científica de seus eventos. O objetivo deste estudo é avaliar características bibliométricas dos resumos apresentados no Congresso Brasileiro de Coloproctologia e determinar os fatores que afetam as taxas de publicação. Métodos: avaliação retrospectiva de todos os resumos apresentados nos Congressos Brasileiros de Coloproctologia dos anos de 2015 a 2019. Análise de múltiplas bases de dados para estimar a taxa de conversão dos trabalhos apresentados, assim como variáveis associadas à conversão dos resumos em manuscritos completos através de análises bivariadas e multivariadas desses preditores. Resultados: foram analisados 1756 resumos. A maioria dos estudos são retrospectivos, séries ou relatos de casos e até experiência pessoal. A taxa de conversão foi de 6,9%. A presença de análise estatística foi o dobro para os resumos publicados frente aos não publicados. Conclusão: os dados apresentados demonstram uma baixa produtividade científica da especialidade, já que as pesquisas realizadas não são publicadas, em sua maioria, como manuscritos completos. Os fatores preditores de publicação dos resumos foram: estudos multicêntricos, estudos contendo análise estatística, desenhos de estudo de maior nível de evidência e estudos premiados pelo congresso.
HOSPITAL VOLUME, POSTOPERATIVE MORTALITY, AND COSTS AFTER GASTRECTOMY FOR GASTRIC CANCER IN COLOMBIA: IS THERE ANY ASSOCIATION?
Authors: Cuesta Antonio Jose , Guevara Oscar , Buitrago Giancarlo
Published: July 2023

ABSTRACT BACKGROUND: There are no information in the literature associating the volume of gastrectomies with survival and costs for the health system in the treatment of patients with gastric cancer in Colombia. AIMS: The aim of this study was to analyze how gastrectomy for gastric cancer is associated with hospital volume, 30-day and 180-day postoperative mortality, and healthcare costs in Bogotá, Colombia. METHODS: A retrospective cohort study based on hospital data of all adult patients with gastric cancer who underwent gastrectomy between 2014 and 2016 using a paired propensity score. The surgical volume was identified as the average annual number of gastrectomies performed by the hospital. RESULTS: A total of 743 patients were included in the study. Hospital mortality at 30 and 180 days postoperatively was 36 (4.85%) and 127 (17.09%) patients, respectively. The average health care cost was USD 3,200. A total of 26 or more surgeries were determined to be the high surgical volume cutoff. Patients operated on in hospitals with a high surgical volume had lower 6-month mortality (HR 0.44; 95%CI 0.27–0.71; p=0.001), and no differences were found in health costs (mean difference 398.38; 95%CI–418.93–1,215.69; p=0.339). CONCLUSIONS: This study concluded that in Bogotá (Colombia), surgery in a high-volume hospital is associated with better 6-month survival and no additional costs to the health system.
Uso, mediação e construção de evidências pela burocracia federal: quem está e o que acontece na interface entre a gestão e a academia?
Authors: Koga Natália Massaco , Palotti Pedro , Couto Bruno Gontyjo do , Lins Rafael da Silva , Nascimento Maricilene Isaira Baia do
Published: July 2023

Resumo: A interface entre a gestão e a academia é um dos elementos constitutivos do campo de políticas públicas. O processo decisório se dá em contextos específicos que mobilizam distintos subsídios, dentre os quais o conhecimento científico. O artigo buscou compreender quem realiza e como se dá a intermediação entre gestores e pesquisadores no âmbito do governo federal brasileiro. Os métodos empregados foram uma pesquisa de survey e dois estudos de caso. Os resultados indicam burocratas intermediadores com elevada escolaridade, cujas atividades relacionais contribuem para o papel que desempenham. Observa-se uma postura ativa e de atuação conjunta entre gestores e pesquisadores para produzir conhecimento aplicado. Portanto, a pesquisa não corrobora a Teoria de Duas Comunidades e aponta para a existência de múltiplas comunidades epistêmicas, conformadas pelo contexto decisório.
As emoções na luta política: um debate mais que necessário
Authors: Ferreira Maria Alice Silveira
Published: July 2023

Resumo: Este trabalho tem como objetivo fazer uma revisão teórica sobre o papel das emoções na ação coletiva, em especial, nos protestos políticos. O trabalho retoma, primeiramente, os estudos sobre a sociologia das emoções que surgem nos Estados Unidos na década de 1970 e que buscam recolocar as emoções como objeto de estudo das ciências sociais. Assim, são apresentadas importantes abordagens teóricas e autores, entre eles Hochschild, Collins, Kemper, que construíram parte desse campo de estudos e ajudaram a fundamentar os trabalhos sobre ação coletiva e emoções. A partir daí, buscou-se apresentar como as emoções podem ser importantes para a luta política e como elas podem ser centrais nas ações de protestos, uma vez que emoções podem ser criadas e transformadas para mobilizar pessoas a ação coletiva.
Protective effect of Mucuna pruriens (L.) DC. var. pruriens seed extract on apoptotic germ cells in ethanolic male rats
Authors: Samrid R. , Taoto C. , Wu A. , Sawatpanich T. , Phunchago N. , Uabundit N. , Iamsaard S.
Published: July 2023

Abstract Thai Mucuna pruriens (L.) DC. var pruriens (T-MP) seed containing levodopa (L-DOPA) and antioxidant capacity has been shown to improve sexual behavior and male reproductive parameters in rats treated with ethanol (Eth). However, its protective effect on testicular apoptotic germ cells has never been reported. This study aimed to investigate the potential effects of T-MP seed extract on expressions of caspase, proliferating cell nuclear antigen (PCNA), and dopamine D2 receptor (D2R) proteins in Eth rats. Thirty-six male Wistar rats were divided into four groups (9 animals/group), including control, Eth, T-MP150+Eth, and T-MP300+Eth, respectively. Control rats received distilled water, and Eth rats received Eth (3g/kg BW; 40%v/v). The T-MP groups were treated with T-MP seed extract at a dose of 150 or 300 mg/kg before Eth administration for 56 consecutive days. The results showed that the seminiferous tubule diameter and epithelial height were significantly increased in both T-MP treated groups compared to the Eth group. Additionally, the caspase-9 and -3, and PCNA expressions were decreased, but D2R expression was markedly increased in T-MP groups. It was concluded that T-MP seed extract could protect testicular apoptosis induced by Eth via changes in caspase, PCNA, and D2R protein expressions.