bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Model Pembelajaran Discovery Learning dengan Problem Based Learning (PBL) Terhadap Hasil Belajar ditinjau dari Keaktifan Siswa
Authors: Retnaningsih Astri , Kusdiwelirawan Acep , Ermawati Imas Ratna
Published: September 2020

This study aims to find the Effect of Discovery Learning with Problem Based Learning to Result of Study in terms of Student Activity. The method used in this study is the True Experimental Design method. Based on the results of hypothesis testing using Two Path ANAVA, the first hypothesis obtained a value of Fhitung= 12.56 > Ft(α=0.05)= 4.06 ; Ft(α=0.01)= 7.24, while for the second hypothesis Fhitung=26.40 > Ft(α=0.05) = 4.06 ; Ft(α=0.01) = 7.24. Then for the third and fourth hypotheses can be calculated using the t-Dunnet test, the value thitung= 9.05 > tt(α=0.05)= 1.678 ; tt(α=0.01)= 2.411 and thitung= 5.64 > tt(α=0.05)= 1.678 ; tt(α=0.01)= 2.411. So from the results of this study it can be concluded that there is an Effect of Discovery Learning with Problem Based Learning to Result of Study in terms of Student Activity.
Dragonflies from hot springs in Russia with a country-level checklist of species known to occur in geothermal environments
Authors: Aksenova Olga V. , Potapov Grigory S. , Bespalaya Yulia V. , Kolosova Yulia S. , Vikhrev Ilya V. , Kondakov Alexander V. , Gofarov Mikhail Yu. , Bolotov Ivan N.
Published: September 2020

Geothermal springs are known to harbor unusual assemblages of dragonflies and damselflies worldwide. A review of original records and the body of available literature revealed that 27 Odonata species were recorded from hot springs in Russia so far and that the successful larval development in geothermal environments was discovered for 17 species. Among them, four species exclusively inhabit hot springs, i.e. Mnais costalis, Anotogaster sieboldii, Orthetrum melania (Kunashir Island), and O. albistylum (Eastern Siberia). In Russia, these southern species are unable to develop beyond geothermally heated water bodies due to cold climate, and they exist as local geothermal populations there. Here, we report on several novel records of Odonata species from geothermal springs in eastern Russia. Four species were recorded on the Kunashir Island (Kurile Archipelago): Mnais costalis (adults), Anotogaster sieboldii (adults and larvae), Orthetrum melania (adults), and Sympetrum pedemontanum elatum (adults and larvae). Two species were found in the Kamchatka Peninsula, i.e. Libellula quadrimaculata (freshly emerged imago and exuvia) and Aeshna juncea (larvae). To explain the origin of isolated geothermal populations of Odonata, three alternative hypotheses can be proposed as follows: (1) pre-glacial relicts; (2) mid-Holocene relicts (since the Holocene Climate Optimum); and (3) recent (late Holocene) populations founded by long-distance dispersal events. These scenarios are yet to be tested by means of a molecular approach.
Machine Learning Based Statistical Analysis of Emotion Recognition using Facial Expression
Authors: Ali Aqib , Nasir Jamal Abdul , Ahmed Muhammad Munawar , Naeem Samreen , Anam Sania , Jamal Farrukh , Chesneau Christophe , Zubair Muhammad , Anees Muhammad Saqib
Published: September 2020

Background: Humans can deliver many emotions during a conversation. Facial expressions show information about emotions.

Objectives: This study proposed a Machine Learning (ML) approach based on a statistical analysis of emotion recognition using facial expression through a digital image.

Methodology: A total of 600 digital image datasets divided into 6 classes (Anger, Happy, Fear, Surprise, Sad, and Normal) was collected from publicly available Taiwan Facial Expression Images Database. In the first step, all images are converted into a gray level format and 4 Regions of Interest (ROIs) are created on each image, so the total image dataset gets divided in 2400 (600 x 4) sub-images. In the second step, 3 types of statistical features named texture, histogram, and binary feature are extracted from each ROIs. The third step is a statistical feature optimization using the best-first search algorithm. Lastly, an optimized statistical feature dataset is deployed on various ML classifiers.

Results: The analysis part was divided into two phases: firstly boosting algorithms-based ML classifiers (named as LogitBoost, AdaboostM1, and Stacking) which obtained 94.11%, 92.15%, and 89.21% accuracy, respectively. Secondly, decision tree algorithms named J48, Random Forest, and Random Committee were obtained with 97.05%, 93.14%, and 92.15% accuracy, respectively.

Conclusion: It was observed that decision tree based J48 classifiers gave 97.05% classification accuracy.
Numerical Solutions of the Work Done on Finite Order-Preserving Injective Partial Transformation Semigroup
Authors: Kehinde Rotimi , Habib Abdulazeez O
Published: September 2020

In this research work, we have used an effective methodology to obtain formulas for calculating the total work done and consequently the average work done and the power of the transformation by elements of finite order-preserving injective partial transformation semigroup. The generalized formulas was applied to obtain the numerical solutions and results tabulated. We equally plot graphs to illustrate the nature of the total work done and the average work done by elements of the finite order-preserving partial transformation semigroup. Results obtained showed that moving the elements from domain to co-domain involve allot of work to be done on a numerical scale
Environmental Degradation and Poverty in Amansie Traditional Area: Investigating the Contributing Factors and the Role of Religion
Authors: Ampofo Charles
Published: September 2020

Environmental degradation and poverty are challenges faced in most parts of the world, and the global quest by some researchers to know the role religious bodieson should play in relation to these issues of concern continues unabated. The ripple effect of these challenges manifests in many areas such as socially, economically, morally, and spiritually. However, the prevailing factors within localities vary, hence requiring wholistic investigations peculiar to a community. Notably, these challenges cannot only be addressed by Government hence the call on Religious Bodiesn as an institution to assist in curbing this menace. This paper investigates the factors contributing to environmental degradation and poverty in Amansie Traditional Area and the role religion should play in addressing these challenges. Questionnaires and interviews were administered to assess these factors from townsfolks, religious leaders, institution heads, and other stakeholders. The results revealed significant factors contributing to these challenges and the roles both African Tradition and Christianity should play in addressing these challenges. The study recommends a strong collaborative effort from all stakeholders, especially religious institutions, in educating and sensitizing the people of Amansie on the issues of environmental sustainability and poverty alleviation.
UPGRADE OF CYBERNETICS IN THE CONTEXT OF DEVELOPING CREATIVITY
Authors: Knysh Inna Vasylivna
Published: September 2020

The author attempted to consider upgrade of cybernetics in the context of developing creativity in modern scientific discourse.
First-order cybernetics studied observed systems, second-order cybernetics dealt with observing systems, and third-order cybernetics studied the
subject–polysubject environment – cyberspace. So, changes in the character of labour, the means of production, industrial relations and labour power
have been analyzed. The article also considers the problem of “physicists and lyric poets”, which prompted researchers to look for possible ways
to resolve the contradictions. It resulted in the establishment of interdisciplinary connections between cybernetics and art at the non-classical
stage, while at the post-non-classical stage, an interdisciplinary synthesis led to their mutually beneficial collaboration. The author uses the
notion of hyphspace as metaphorical abstraction for defining a virtual reality (a component of the noosphere) that exists inside a computer network
(the subject–polysubject environment). Hyphspace at the present stage of cybernetics development is becoming the basis for its subsequent (but not final)
upgrade – fourth order cybernetics. Cybernetics in an interdisciplinary synthesis with art is moving from cognizing human–machine systems to the formations
with growing human-dimensionality, where there is a persistent increase in the number of users–nomads.
CLEANING OF H2S FROM POLLUTED AIR USING PEAT BIOFILTER
Authors: Vaiškūnaitė Rasa
Published: September 2020

Every year about 64 thousand tons of polluted air is being released to the ambient air. More than 30% of this pollution consists of toxic sulfur compounds. The properties of biological air cleaning technology – biofoltration with peat media – has been discussed in the article. Research was performed by using biofilter from Vilnius Gedimi-nas technical university laboratory. During testing ambient air, polluted with sulfur dioxide, was pulled through the biomedia with division of Thiobacillus microorganisms and calculations of cleaning efficiency were performed. Was determined the efficiency of peat biofilter charge (changing the technical characteristics of the air flow rate, the number of layers, the pollutant concentration value) depending on the nature of the investigated sulfur compounds and their concentrations.
Antiplatelet therapy after PCI in patients with high risk of bleeding
Authors: Zheleva-Kyuchukova Ivayla , Gelev Valeri
Published: September 2020

The progress of percutaneous coronary interventions (PCI) over the last few decades facilitated treatment of increasingly complex patient populations. The introduction of drug-eluting stents (DESs) led to need of stronger and prolonged inhibition of platelets which in turn increased the incidence of bleeding complications. The identification and management of patients at high bleeding risk (HBR) during and after percutaneous coronary interventions (PCI) is still problematic in everyday clinical practice.
Tunneling radiation and quantum entropy of a massive gravity black hole
Authors: LI Gu Qiang , ZHUANG Yi Wen
Published: September 2020

By using the Parikh-Wilczek (PW) quantum tunneling method, the Hawking radiation of black holes inmassive gravity is investigated, the emission rate of particles and the black hole entropy are calculated. It is shownthat the emission spectrum is not purely thermal, depends on the increment of the black hole entropy, consists with anaccurate unitary theory and supports the standpoint of information conservation. Unlike other modified gravities, theentropy of the massive gravity black hole unexpectedly conforms to the area law just as that of Einstein gravity blackhole.
De nouveaux outils de pilotage dans un package existant : une nécessaire et difficile synchronisation
Authors: Tahar Caroline
Published: September 2020

Si la notion de package de contrôle de gestion a donné lieu à une abondante littérature, la question de l’intégration de nouveaux outils dans un tel ensemble demeure peu explorée. Visant à combler ce gap théorique, cet article contribue à une meilleure compréhension des interactions entre les nouveaux outils et le package où ils s’insèrent. Il s’appuie sur une recherche intervention à l’occasion de laquelle des outils inspirés du Throughput Accounting ont été intégrés à un package de contrôle de gestion. Cet article montre que pour qu’une telle intégration réussisse, une synchronisation des outils , de la stratégie et des acteurs est nécessaire, aboutissant à un système cohérent. Il témoigne de la nécessité de déconstruire les automatismes des acteurs en redonnant du sens aux outils et aux pratiques pour rendre cette synchronisation possible.
Médecin militaire : un métier à la croisée de deux univers
Authors: de Veyrinas Gaëtan
Published: September 2020

A la croisée de deux formations, civile et militaire, le jeune médecin militaire se forme à l’exercice de son métier qui le verra exercer la médecine au soutien des forces armées
The dysphoric body politic, or Seizing the means of imagination
Authors: Ledbetter Charlie
Published: September 2020

Although escapism has been used pejoratively in describing fandom, it might be reframed as a reaction to untenable external circumstances. This reformulation of escapism is a starting point for examining how fan fiction is a political practice. In light of the political upheaval in the United States as well as the existential threat of climate change, this is a topical, even urgent, collective project for producing survivable conditions. Fan fiction uniquely diagnoses and imagines alternatives to oppressive political conditions. The lens of political dysphoria, adapted from critical transgender studies and used here to describe the dissonance between dominant political structures and desiring subjects, permits exploration of how fan fiction enables subjects to acknowledge oppressive political conditions, engage in coalitional rebellion, and reimagine societal structures for collective liberation.
Toward a queered and/as affective theory of fandom
Authors: Lowe JSA
Published: September 2020

Wittgensteinian propositions are used to investigate whether there is some benefit from thinking about objects of fandom and their vectors via affect theory and queer theory as an inverse analytical approach: fandom as something that is not text specific but rather affect or even body specific.
The “Crossing Borders Project”
Authors: Livingstone Smith Alexandre , Van der Veken Anneleen
Published: September 2020

The Crossing borders project, Musée royal de l’Afrique centrale (Tervuren, Belgium), aims at the methodological integration of archaeology and historical linguistics. The correlation between, on the one hand, archaeological cultures and, on the other hand, the bantu languages expansion phenomenon has generated heated debates. To promote the integration of archaeology and linguistics, keeping a tight control on the data we have chosen to limit temporal and spatial framework of our field of investigation to south central Africa during the last millennia. Methodological integration is achieved thanks to the analysis of pottery traditions used as an interface between disciplines and between the present and the past. In this paper, we examine the distribution of pottery building techniques (roughing-out stage) in Katanga (Democratic Republic of Congo). The existence of three great technical provinces is correlated to diverse form of social identity. The role of famous regional political entities in the formation of social spaces is considered.
René Apallec, « chirurgien-plasticien sur le papier »
Authors: Bouchet Renaud
Published: September 2020

Le collagiste normand René Apallec (né en 1898) aurait vécu la Grande Guerre comme infirmier dans un service de chirurgie plastique. Cette expérience semble à l’origine de ses 200 défigurations de généraux et maréchaux portraiturés qui composent sa série des « Gueules cassées », développée peu après la fin des combats. Avec cette pratique, l’artiste aurait cherché à dénoncer l’absurdité de la guerre-boucherie, à venger les véritables traumatisés de la face, et peut-être aussi à se libérer de sa propre hantise. Cachés de son vivant, ces portraits détruits et remodelés commencent aujourd’hui à acquérir une véritable reconnaissance nationale et internationale. Mais René Apallec est lui-même une création récente, sortie de l’imagination du plasticien toulousain Hervé Laplace.
The Etruscans and the Mediterranean : The City of Cerveteri
Authors: Uhlenbrock Jaimee
Published: September 2020

On December 5, 2013, an impressive exhibition opened at the Musée du Louvre-Lens, “the other Louvre,” that surely will appeal to anyone interested in terracotta sculpture, as well as to anyone interested in the cultures and civilizations of the ancient Mediterranean. The Etruscans and the Mediterranean : The City of Cerveteri presents a history of the city that is largely based on new results obtained from recent excavations at the site, within which objects from major historical collections are viewed. A product of a collaboration between the Musée du Louvre, the CNR - Istituto di studi sul Mediterraneo Antico, Rome, the Soprintendenza per i Beni Archeologici dell’Etruria Meridionale, and the Museo Nazionale Cerite, this exhibition comprises many works that have never been seen together that document with extraordinary clarity the changing values and customs of this important Etruscan city over the course of some 500 years. This is the third major exhibition organized by the Musée du Louvre this past year for its satellite museum at Lens in north-eastern France that opened a little more than a year ago, in December 2012. Built over a wasteland that was once home to the coal mining industry of Lens, the Louvre-Lens, a large, modernist structure with minimalist gardens, is expected to help revitalize the economy of the area that entered a depression with the collapse of the coal mining industry of France in the mid-20th century. An installation over the exit doors of the museum of large, vintage photographs of coal miners presented in a continuous loop is a touching reminder of the difficult and dangerous occupations that sustained this region of France for more than 150 years. Nor can one ignore the enormous pyramids of coal wasters that can be seen from the large windows of the museum that now have the status of national monuments.
Les particularités de la zone côtière dans la persécution des Juifs dans le Nord et le Pas-de-Calais occupés (1940-1944)
Authors: Rigaut Rudy
Published: September 2020

À l’échelle de la zone littorale du Nord et du Pas-de-Calais placée en « zone rouge » durant l’année 1940, les enjeux géostratégiques et idéologiques font des Juifs, présents dans le secteur, les cibles privilégiés de mesures précoces de surveillance, d’identification et d’expulsion commanditées par l’occupant allemand, secondé par les administrations françaises locales. Après l’opération du 17 décembre 1940 au cours de laquelle une cinquantaine de Juifs sont expulsés vers un centre d’internement à Troyes, les autorités allemandes pensent y avoir régler la « question juive » dans la zone. Cependant, à partir de l’été 1942, l’occupant y achemine environ 2 600 Juifs pour les interner et les exploiter dans les camps et les chantiers de l’organisation Todt. La déportation de la majorité d’entre eux en octobre 1940 atteste de la mise en œuvre de la « Solution finale » dans la région. Le changement d’échelle donne à voir toute la diversité et la complexité du processus de persécution des Juifs dans ces deux départements.
The Application of CEL Technique to Simulate the Behavior of an Underwater Explosion Bubble in the Vicinity of a Rigid Wall
Authors: Nguyen Anh Tu
Published: September 2020

The dynamic process of an underwater explosion (UNDEX) is a complex phenomenon that involves several facets. After detonation, the shockwave radially propagates at a high speed and strikes nearby structures. Subsequently, bubble oscillation may substantially damage the structures because of the whipping effect, water jet impact, and bubble pulse. This paper presents an application of explicit finite element analyses to simulate the process of an UNDEX bubble in the vicinity of rigid wall, in which the coupled Eulerian-Lagrangian (CEL) approach was developed to overcome the difficulties regarding the classical finite element method (FEM), large deformations, and flow simulation of fluid and gas. The results demonstrate that the method is well suited to manage the UNDEX bubble problem and can be used to model the major features of the bubble dynamics. Furthermore, the behavior of an UNDEX bubble near a rigid wall was also examined in the present study, which showed that the migration of the bubble and the development of the water jet are influenced strongly by the standoff distance between the initial bubble position and the wall. This method can be used in future studies to examine UNDEX bubbles in the vicinity of deformable and complex structures.
Study on the Effects of Technology Parameters on the Water Absorption and the Thickness Swelling of the Pressed Bamboo Pulp Plywood
Authors: Nguyen Thanh Nam , Vo Tuyen , Hung Tran Van
Published: September 2020

The application of bamboo by-products such as bamboo branches, chips to recycle and produce pressed bamboo pulp is an urgent task in Vietnam. It perfectly replaces natural wood with artificial wood embryos from bamboo powder, which has both economic benefits of reserving the source of raw materials, environmental protection... The paper presents a study of the influence of technological parameters on the water absorption and swelling thickness of pressed bamboo pulp plywood in order to ameliorate the quality of pressed bamboo pulp plywood in production of new materials for civil engineering with environmentally friendly bamboo wood pulp materials.
A Research on Optimization of Technological Parameters to the Objective Function of the Deep Dimensions when Forming Sheet Material by HOTSpif
Authors: Vo Tuyen , Dien Le Khanh , Nguyen Thanh Nam , Lien Hoang Duc , Nguyen Tan Ken
Published: September 2020

Single Point Incremental Forming (SPIF) technology has become popular and familiar in sheet materials forming, especially in single manufacturing, prototype manufacturing and in the medical field.... However, sheet materials with high hardness and durability are difficult to deform and shape because of their high properties. In that case, when we determine the main logical technological parameters such as forming temperature T (°C), speed of forming Vxy tool (mm/min), depth tool feeding z (mm) and tool diameter D (mm) tool, it is possible to apply HOT SPIF technology at high temperature to form these materials. The paper presents a study of optimization the main technology parameters when processing non-alloy Titanium sheet materials with HOT SPIF technology to get the smallest depth dimension error ΔH.
A Measure of Optimization of Technological Parameters to Improve the Formability of Stainless Steel Sheet SUS 304 by SPIF Technology
Authors: Vo Tuyen , Nguyen Thanh Nam , Nguyen Phan Anh , Le Khanh Dien , Nguyen Tan Ken , Tran Trung Le
Published: September 2020

The objective of this paper is to select a set of technological forming parameters including vertical feed Δz, feeding rate of Vxy of the tool (a kind of pestle but no-cutting edges), the diameter of tool D and the revolutions per minute of tool n to achieve the highest forming ability of stainless steel sheet SUS304 (according to JIS Japanese standard) when forming metal sheet by Single Point Incremental Forming Technology-SPIF. The content of the article consists of 3 processes: Pre-design of experiment (Pre-DOE) to select of a set of reasonable limited parameters when forming SUS304 stainless steel models when forming on the existent specialist SPIF machine in the National Key Laboratory of Digital Control and System Engineering laboratory (DCSELAB); Performing SUS304 models on the Pre-DOE to obtain the forming angle values; Evaluating the experimental results by Analyzing of the variance; Setting up the regression equation of the angle of deformability with influence parameters Optimization the regression equation to select an optimal set of forming parameters to gain the highest deformability of stainless steel sheet SUS304.
Using SiO2 Hard Mask for Fabrication of Micro Fresnel Focusing Lens for Ultrasonic Ejectors
Authors: Bui Tuan Anh , Pan Min Chun , Wu Tzon Han , Le Thanh Long
Published: September 2020

The fabrication of Fresnel focusing lenses operating at frequencies of 100 and 200 MHz was investigated in order to enhance the focusing efficiency of ultrasonic energy. The effects of process parameters on the four-level Fresnel lens profiles were discussed to find a most feasible fabrication procedure through these experiments. The quality of Fresnel lenses was improved when two-and three-mask processes using SiO2 film as the hard mask were employed. Besides, a better side-wall profile of Fresnel lens was obtained by using the three-mask process as compared to the two-mask one.
Rapid Collection of Human Rectal Secretions Using OriCol Devices Is Suitable for Measurement of Mucosal Ig without Blood Contamination
Authors: Czartoski Julie , Lemos Maria P. , Fong Youyi , Mize Gregory J. , Konchan Anne , Berger David , Maenza Janine , McElrath M. Juliana
Published: September 2020

Measurements of IgG and IgA in human rectal secretions are used to evaluate the Abs elicited by HIV vaccines or the bioaccumulation following immunoprophylaxis at the sites of HIV exposure. To improve sampling methods and tolerability of the procedure, we optimized a balloon device (OriCol) for rectal microbiome sampling requiring 10 second inflation and compared this method to a 5 minute collection using sponges. Lubrication of the device did not interfere with IgG, IgA, or hemoglobin ELISA. Lubricated OriCols inflated to 30 cc minimized hemoglobin contamination (<4.68 ng/ml) compared with collections with two sponge types (Weck-Cel: 267.2 ng/ml, p < 0.0001; and Merocel: 59.38 ng/ml, p = 0.003). Median human serum albumin for OriCols was 14.9 μg/ml, whereas Merocels and Weck-Cels were 28.57 μg/ml (p = 0.0005) and 106.2 μg/ml (p = 0.0002), respectively. Consistent with reduced systemic contamination, the median IgG measured in OriCol-collected rectal secretions (986 ng) was lower than secretions from sponges (Weck-Cel: 8588 ng, p < 0.0001; Merocel: 2509 ng, p = 0.0389). The median IgA yield of samples using the OriCol method (75,253 ng) was comparable to that using Merocel (71,672 ng; p = 0.6942) but significantly higher than Weck-Cel sponges (16,173 ng, p = 0.0336). Median recovery volumes for OriCols were 800 μl, whereas Merocels and Weck-Cels were 615 μl (p = 0.0010) and 655 μl (p = 0.0113), respectively. The balloon device was acceptable among 23 participants, as 85.1% experiencing their first collection ranked it as “seven: acceptable – a lot” or “six: acceptable – somewhat” in a seven-point Likert scale. Therefore, lubricated OriCols inflated to 30 cc allowed for a rapid, well-tolerated, blood-free collection of human rectal secretions.
Influence of Pseudomonas spp. on Okra (Abelomuscus esculantaus L.) growth parameters and antioxidant activities under soil salinity
Authors: Vimal Shobhit Raj , Singh Ashish Kumar , Singh Jay Shankar
Published: September 2020

In this study total twenty seven gram negative NaCl tolerant rhizobacterial strains were isolated from disturbed soils of Lucknow districts. The 3 selected sampling sites were Bijnor, Pasi Quila and Babasaheb Bhimrao Ambedkar University Campus, Lucknow, India. The isolates have been investigated for different plant growth promoting and biochemical activities. Based on morphological and biochemical tests the total eight (8) rhizobacterial strains were designated as Pseudomonas spp. Among PGP traits, all 8 Pseudomonas strains were examined for Indole-3-Acetic Acid (IAA) production activity. The bacterialisolate IAA4 produces maximum 21.16±3.24 μg mL-1 of IAA at 100 μg mL-1 tryptophan concentration among Pseudomonas strains. This strain show excellent P solubilization and N fixatation in qualitative assay. The higher amount of NaCl salt in soils positively reduces paddy plant physiology and growth parameters. The IAA4 inoculation in okra seeds significantly (P<0.001) improved plant growth parameters, green pigments and modulate antioxidant activities under pot experimental study
Effectiveness and Safety of Dabrafenib in the Treatment of 20 Chinese Children with BRAFV600E-Mutated Langerhans Cell Histiocytosis
Authors: Yang Ying , Wang Dong , Cui Lei , Ma Hong-Hao , Zhang Li , Lian Hong-Yun , Zhang Qing , Zhao Xiao-Xi , Zhang Li-Ping , Zhao Yun-Ze , Li Na , Wang Tian-You , Li Zhi-Gang , Zhang Rui
Published: September 2020

Purpose We sought to investigate the effectiveness and safety of dabrafenib in children with BRAFV600E-mutated Langerhans cell histiocytosis (LCH). Materials and Methods A retrospective analysis was performed on 20 children with BRAFV600E-mutated LCH who were treated with dabrafenib. Results The median age at which the patients started taking dabrafenib was 2.3 years old (range, 0.6 to 6.5 years). The ratio of boys to girls was 2.3:1. The median follow-up time was 30.8 months (range, 18.9 to 43.6 months). There were 14 patients (70%) in the risk organ (RO)+ group and six patients (30%) in the RO– group. All patients were initially treated with traditional chemotherapy and then shifted to targeted therapy due to poor control of LCH or intolerance to chemotherapy. The overall objective response rate and the overall disease control rate were 65% and 75%, respectively. During treatment, circulating levels of cell-free BRAFV600E (cfBRAFV600E) became negative in 60% of the patients within a median period of 3.0 months (range, 1.0 to 9.0 months). Grade 2 or 3 adverse effects occurred in five patients. Conclusion Some children with BRAFV600E-mutated LCH may benefit from monotherapy with dabrafenib, especially high-risk patients with concomitant hemophagocytic lymphohistiocytosis and intolerance to chemotherapy. The safety of dabrafenib is notable. A prospective study with a larger sample size is required to determine the optimal dosage and treatment duration.
The structure of spatial slices of 3-dimensional causal triangulations
Authors: Durhuus Bergfinnur , Jonsson Thordur
Published: September 2020

We consider causal 3-dimensional triangulations with the topology of

S^2\times [0,1]

or

D^2\times [0,1]

where

S^2

and

D^2

are the two-dimensional sphere and disc, respectively. These triangulations consist of slices and we show that these slices can be mapped bijectively onto a set of certain coloured 2-dimensional cell complexes satisfying simple conditions. The cell complexes arise as the cross section of the individual slices.
Fractal geometry of the complement of Lagrange spectrum in Markov spectrum
Authors: Matheus Carlos , Moreira Carlos Gustavo
Published: September 2020

The Lagrange and Markov spectra are classical objects in Number Theory related to certain Diophantine approximation problems. Geometrically, they are the spectra of heights of geodesics in the modular surface.

These objects were first studied by A. Markov in 1879, but, despite many efforts, the structure of the complement

M\setminus L

of the Lagrange spectrum

L

in the Markov spectrum

M

remained somewhat mysterious. In fact, it was shown by G. Freiman (in 1968 and 1973) and M. Flahive (in 1977) that

M\setminus L

contains infinite
countable
subsets near 3.11 and 3.29, and T. Cusick conjectured in 1975 that all elements of

M\setminus L

were

< \sqrt{12} = 3.46\ldots

, and this was the
status quo
of our knowledge of

M\setminus L

until 2017.

In this article, we show the following two results. First, we prove that

M\setminus L

is
richer
than it was previously thought because it contains a Cantor set of Hausdorff dimension larger than 1/2 near 3.7: in particular, this solves (negatively) Cusick's conjecture mentioned above. Secondly, we show that

M\setminus L

is
not
very thick: its Hausdorff dimension is strictly smaller than one.
Usage des emballages plastiques dans la restauration de rue et assainissement des villes ouest-africaines : exemple de Lomé au Togo
Authors: Adjalo Djiwonou Koffi , Houedakor Koko Zébéto , Zinsou-Klassou Kossiwa
Published: September 2020

Les villes ouest-africaines connaissent une expansion démographique et spatiale, rapide et continue, depuis plusieurs décennies, avec développement de nouveaux modes de vie et de restauration. La restauration de rue, dans la quête de la satisfaction des besoins alimentaire de la population urbaine, fait usage des emballages plastiques. Dans ce secteur acquis à l’informel, l’usage de ces emballages entraîne des effets néfastes sur le système d'assainissement des villes ouest-africaines dont Lomé. Le présent article met en exergue l’usage des emballages plastiques dans la restauration de rue et son impact sur l’assainissement à Lomé. Pour ce faire, une enquête a été effectuée auprès de 225 consommateurs de rue choisis sur 45 points de vente, retenus par choix raisonné dans l’agglomération urbaine de Lomé. Les consommateurs d’aliments de rue sont essentiellement des fonctionnaires (40%) et des commerçants (35,11%). 75% des consommateurs sont des hommes et 82,5% des restaurateurs, des femmes. Les emballages plastiques sont utilisés dans le conditionnement des aliments de rue à Lomé. Devenus déchets après usage, les emballages plastiques ne font pas objet d’une gestion particulière. Une catégorisation des déchets à la source, conduirait à l’efficacité de leur gestion pour un meilleur assainissement de nos villes.

Mots clés : Emballages plastiques, alimentation de rue, assainissement, urbanisation, environnement, Lomé-Togo

 

English title: Use of plastic packaging in street restoration and sanitation in west african cities : The case of Lomé

West African cities have experienced rapid and continuous demographic and spatial expansion for several decades with the development of new lifestyles and restaurants. Street catering, in the quest to meet the food needs of the urban population, uses plastic packaging. In this informal sector, the use of this packaging has harmful effects on the sanitation system in West African cities, including Lomé. This article highlights the use of plastic packaging in street food and its impact on sanitation in Lomé. To do this, a survey was carried out among 225 street consumers chosen from 45 points of sale, selected by reasoned choice in the urban agglomeration of Lomé. Street food consumers are mainly civil servants (40%) and traders (35.11%). 75% of consumers are men and 82.5% of restaurateurs are women. Plastic packaging is used in the packaging of street food in Lomé. Having become waste after use, plastic packaging is not subject to special management. A categorization of waste at source will lead to efficient management for better sanitation in our cities.Keywords: Plastic packaging, street food, sanitation, urbanization, environment, Lome-Togo
Investigating Elementary Students’ Problem Solving and Teacher Scaffolding in Solving an Ill-Structured Problem
Authors: Cho Mi Kyung , Kim Min Kyeong
Published: September 2020

This study investigated the features of elementary students’ problem solving skills, when teachers provide scaffolding in the process of solving an ill-structured problem in an elementary school mathematics classroom in Seoul, South Korea. In this study, participants solved the ill-structured problem following the phases of Analyze, Browse, Create, Decision-making, and Evaluate. When problem solving was completed without the phase of the Evaluate, to provide metacognitive scaffolding helped to analyze the information of the problem in more depth by returning to identifying related information, which was the sub-phase of Analyze and Browse. When there were difficulties in deepening their understanding of the information from the problem situation, to provide strategic scaffolding helped to access information in an organized way and facilitated solving an ill-structured problem. Based on these results, this study draws implications about scaffolding that can help in the process of solving ill-structured problems, and ultimately suggests the direction to advance to improve problem solving ability in mathematics education.
O que revelam as reflexões de futuros professores de Matemática sobre teoria e prática?
Authors: Oliveira Edvanilson Santos de , Pereira Patrícia Sandalo
Published: September 2020

O artigo apresenta os resultados de um estudo de caso, de caráter interpretativo, realizado com futuros professores cursando a disciplina de Prática de Ensino de Matemática II, do curso de Licenciatura em Matemática na Universidade Federal do Mato Grosso do Sul (UFMS). O estudo buscou analisar as reflexões dos futuros professores sobre teoria e prática. Para tanto, elaboramos, como aporte teórico, estudos relacionados à reflexão no contexto da formação de professores, à relação teoria e prática e à práxis. Elegemos, como instrumento de coleta dos dados, o diário de bordo, o qual se constituiu de uma potente fonte para análise dos registros das reflexões dos partícipes. Os resultados do presente estudo fomentam e enriquecem as pesquisas que versam sobre a formação de professores de Matemática, ao revelar a importância da reflexão crítica, desde a formação inicial, com vistas a contribuir para o desenvolvimento profissional por meio de sua práxis.
Palavras-chave: Licenciatura em Matemática. Teoria. Prática. Práxis. Reflexão.
Investigation on the quality of water from Jabi Lake in Abuja, Nigeria
Authors: Chima Ogoko Emeka , Olayinka Sylvester Ajayi
Published: September 2020

Surface water may constitute public health issues if the water is contaminated. Consequent upon this assertion, the physicochemical parameters and tr ace metal concentration of Jabi Lake surface water were analysed and compared with WHO standards. Sixteen water samples were taken for analysis from Jabi Lake within Abuja in Nigeria. Official Methods of Analysis of the Association of Official Analytical Chemists (AOAC) were adopted in the analysis of the physicochemical parameters while heavy metals ions determination was performed using Atomic Absorption Spectrophotometer. The results obtained revealed marked differences in the levels of some physicochemical properties and trace metal ion concentration in the surface water samples when compared with WHO standards. Though most physicochemical parameters were within acceptable and safe limits, but with nitrate having higher concentrations. The concentrations of manganese, iron, cobalt, lead and chromium were well above the WHO maximum permissible limits for surface water. The pollution index of manganese, iron, cobalt, lead and chromium were above unity (1.0), indicating very high level of pollution. The results of the physicochemical and trace metal analysis when compared with WHO suggest that the water samples from Jabi Lake was not suitable for drinking while the concentrations of the metal ions were found decreasing in this order; Pb ˃Fe˃Cr˃Mn˃Co˃Zn.
The Validity of Concept Attainment With Multi Representation as an Alternative Learning Model to Improve Students' Mastery of Concepts and Scientific Consistency
Authors: Dwikoranto  , Pramonoadi  , Tresnaningsih Sri , Faqih Abdul , Setiani Rahyu
Published: September 2020

The concept attainment tutorial tool with multi representations still needs to be developed. The purpose of this study is to describe the validity of the model and the validity of concept attainment devices with multi representations as alternative learning models to improve students' mastery of concepts and scientific consistency. The development of this tutorial tool uses the design of Plomp which consists of preliminary study phase, prototype stage, and assessment phase. The limited test was conducted on students of the Surabaya Open University in the Basic Science Natural Sciences course (PDGK4103). Research data were collected by the validation method using the model validation sheet instrument and the device validation sheet. Data were analyzed using qualitative descriptive analysis. The results of the study show that: (1) The concept of attainment model with multi representations developed is included in the valid criteria in terms of content validity and construct validity. (2) The multi-representation tutorial tool developed is included in the valid criteria. Based on the above it can be concluded that the concept of attainment with multi representations developed is valid and appropriate to be used to improve students' mastery of concepts and scientific consistency.
Education and the New Dark Ages? Conspiracy, social media and science denial
Authors: Peters Michael , Besley Tina
Published: September 2020

With the increasing use of social media by many people, and where many actually get their news from social media rather than traditional media sources (newspapers, TV, and journals) amidst the Covid-19 pandemic, there is a huge increase in the number and influence of conspiracy theories world-wide. This has meant that those who believe and follow such theories are more likely to reject official health advice and government instructions, amid science denialism, anti-scientism and a distrust of experts, as well as politicians. Despite some efforts to remove misleading information, it remains easy to find sites promoting conspiracies such as ‘5G coronavirus’ as well as hate speech. But such theories are not limited to coronavirus, and in fact many others, such as QAnon, are actively or tacitly promoted by President Trump. Noting that neither conspiracies, nor science denialism are new, we start by briefly looking at the transition from the Dark Ages to Enlightenment and the Age of Reason, noting the case of Galileo. Then it was very dangerous to hold well-reasoned scientific views that did not fit with the prevailing views of the time; a combination of philosophical, and theological Church beliefs, which were based on Aristotelian geocentric views of the earth as the centre of the universe, and a geostatic literal biblical interpretation. We look at present day scientific skepticism and how to debunk some of the most widely held scientific myths. The need to educate and advocate for education that includes critical thinking, critical literacy, and critical media literacy is more important than ever or we risk having a large proportion of the population believing only what they read on social media and becoming dangerously anti-science and not prepared to even consider data or evidence and so be at the mercy of rampant and dangerous conspiracy theories — maybe risking a ‘New Dark Ages’!
Una secuencia didáctica sobre el Modernismo, la Generación del 98 y las oraciones coordinadas
Authors: Claudio Carmen Romero , Ponce Hugo Heredia
Published: September 2020

Secuencia didáctica para el cuarto curso de Educación Secundaria Obligatoria para trabajar el Modernismo, la Generación del 98 y las oraciones coordinadas.
Spray drift with several nozzles under wind breeze in a vineyard nursery
Authors: Homer Bannister Ian , Prieto Varón Mayerly , Diaz Martínez Verónica
Published: September 2020

The area planted with grapes in Chile has grown nearly 50 % in the last 12 years, causing a drastic increase in use of agrichemicals. In particular, herbicides need to be applied more precisely to reach the desired targets. Weeds are a limiting factor in nurseries, mostly because of the reduced distance between rows. The spray nozzles are of vital importance because they distribute the mixture over the target. A comparative study between conventional extended rage flat spray (XR) and drift reducing nozzles (TT, DG and AI) was conducted in Vitis vinifera L. cv. Thompson Seedless plants self-rooted in the nursery, studying the drift detection and quantification, of a 5.8 km.h-1 wind breeze, using the food tracer Brilliant Blue FD & C-1. Under this breeze condition, at the plants level, the drops produced with the XR nozzle suffered a trajectory deviation. A strong decrease in the spray deposits occurred while the spray area distance increased. At ground level, it was appreciated that with wind conditions, there is an increase in all the nozzles of the tanks before the plant, next to it, and after cultivation, but these did not become statistically significant at this wind level
Combining ability and heterosis for yield, precocity and height in yellow maize genotypes
Authors: García Mora Victor Mario , Chura Chuquija Julián , Torres Julio
Published: September 2020

The objective of the present study was to determine the general combinatorial aptitude (GCA), specific combinatorial aptitude (SCA) and heterosis in inbred lines of yellow maize and its crosses for, the yield of grain, height of plant and ear and days to male and female flowering. Six inbred lines from CIMMYT, their direct crosses and four controls were evaluated at UNALM during 2016-2018, under a 5 x 5 lattice design with four repetitions. The effects of GCA and SCA were calculated using method II, model I of Griffing. Heterosis was measured based on the mean and best parent. Heterosis was measured based on the mean and best parent. The combined analysis of years showed significance (p ≤ 0.01) in: genotypes by years for days to male and female flowering; GCA for years for days to male flowering and SCA for years for days to female flowering. The effects of ACG for grain yield were significant in lines CML 229 and CML 428, for plant height, precocity, ear and precocity CML 487 line highlighted. The effect of ACE was superior in the cross CML 453 x CML 486 for the grain yield character. Heterosis was higher for the grain yield in the CML 229 x CML 453 and CML 453 x CML 487 crosses. The GCA / SCA relationship evidenced effects of additive genes on plant height, days to male and female flowering, therefore, for grain yield and ear height, non-additive effects governed.
Asymptotic curved normal distribution
Authors: KUMAR C. SATHEESH , ANILA G. V.
Published: September 2020

Here we introduce a new class of skew normal distribution as a generalization of the extended skew curved normal distribution of Kumar and Anusree (J. Statist. Res., 2017) and investigate some of its important statistical properties. The location-scale extension of the proposed class of distribution is also defined and discussed the estimation of its parameters by method of maximum likelihood. Further, a real life data set is considered for illustrating the usefulness of the model and a brief simulation study is attempted for assessing the performance of the estimators.
Comparison study on the confidence intervals in linear regression models with restricted parameter space
Authors: BAI XIUQIN , SONG WEIXING
Published: September 2020

This paper proposes an empirical likelihood confidence region for the regression coefficients in linear regression models when the regression coefficients are subjected to some equality constraints. The shape of the confidence set does not depend on the re-parametrization of the regression model induced by the equality constraint. It is shown that the asymptotic coverage rate attains the nominal confidence level and the Bartlett correction can successfully reduce the coverage error rate from $O(n^{-1})$ to $O(n^{-2})$, where n denotes the sample size. Simulation studies are conducted to evaluate the finite sample performance of the proposed empirical likelihood empirical confidence estimation procedure. Finally, a comparison study is conducted to compare the finite sample performance of the proposed and the classical ellipsoidal confidence sets based on normal theory.
PENGARUH PELAKSANAAN MAINTENANCE DAN LINGKUNGAN FISIK TERHADAP KEPUASAN PENGGUNA JASA GHADA GYM DAN FITNESS CENTER DI DENPASAR
Authors: Suarjaya Agus , Herlambang Putu Gede Denny
Published: September 2020

Jumlah responden dalam penelitian ini sebanyak 70 menggunakan teknik sampling insidental. Berdasarkan hasil analisis data, uji signifikansi simultan (F-test) dapat menunjukkan bahwa pelaksanaan maintenance dan lingkungan fisik secara simultan berpengaruh positif dan signifikan terhadap kepuasan pengguna jasa dan uji signifikansi parsial (t-test) menunjukkan bahwa pelaksanaan maintenance secara parsial berpengaruh positif dan signifikan terhadap kepuasan pengguna jasa, lingkungan fisik secara parsial berpengaruh positif dan signifikan terhadap kepuasan pengguna jasa.