bluuebunny/crossref_metadata_2025 huggingface dataset:
Convex Formulations for Fair Principal Component Analysis
Authors: Olfat Matt , Aswani Anil
Published: September 2019

Though there is a growing literature on fairness for supervised learning, incorporating fairness into unsupervised learning has been less well-studied. This paper studies fairness in the context of principal component analysis (PCA). We first define fairness for dimensionality reduction, and our definition can be interpreted as saying a reduction is fair if information about a protected class (e.g., race or gender) cannot be inferred from the dimensionality-reduced data points. Next, we develop convex optimization formulations that can improve the fairness (with respect to our definition) of PCA and kernel PCA. These formulations are semidefinite programs, and we demonstrate their effectiveness using several datasets. We conclude by showing how our approach can be used to perform a fair (with respect to age) clustering of health data that may be used to set health insurance rates.
Zero Shot Learning for Code Education: Rubric Sampling with Deep Learning Inference
Authors: Wu Mike , Mosse Milan , Goodman Noah , Piech Chris
Published: September 2019

In modern computer science education, massive open online courses (MOOCs) log thousands of hours of data about how students solve coding challenges. Being so rich in data, these platforms have garnered the interest of the machine learning community, with many new algorithms attempting to autonomously provide feedback to help future students learn. But what about those first hundred thousand students? In most educational contexts (i.e. classrooms), assignments do not have enough historical data for supervised learning. In this paper, we introduce a human-in-the-loop “rubric sampling” approach to tackle the “zero shot” feedback challenge. We are able to provide autonomous feedback for the first students working on an introductory programming assignment with accuracy that substantially outperforms data-hungry algorithms and approaches human level fidelity. Rubric sampling requires minimal teacher effort, can associate feedback with specific parts of a student’s solution and can articulate a student’s misconceptions in the language of the instructor. Deep learning inference enables rubric sampling to further improve as more assignment specific student data is acquired. We demonstrate our results on a novel dataset from Code.org, the world’s largest programming education platform.
Exploiting Time-Series Image-to-Image Translation to Expand the Range of Wildlife Habitat Analysis
Authors: Zheng Ruobing , Luo Ze , Yan Baoping
Published: September 2019

Characterizing wildlife habitat is one of the main topics in animal ecology. Locational data obtained from radio tracking and field observation are widely used in habitat analysis. However, such sampling methods are costly and laborious, and insufficient relocations often prevent scientists from conducting large-range and long-term research. In this paper, we innovatively exploit the image-to-image translation technology to expand the range of wildlife habitat analysis. We proposed a novel approach for implementing time-series imageto-image translation via metric embedding. A siamese neural network is used to learn the Euclidean temporal embedding from the image space. This embedding produces temporal vectors which bring time information into the adversarial network. The well-trained framework could effectively map the probabilistic habitat models from remote sensing imagery, helping scientists get rid of the persistent dependence on animal relocations. We illustrate our approach in a real-world application for mapping the habitats of Bar-headed Geese at Qinghai Lake breeding ground. We compare our model against several baselines and achieve promising results.
Dynamic Spatial-Temporal Graph Convolutional Neural Networks for Traffic Forecasting
Authors: Diao Zulong , Wang Xin , Zhang Dafang , Liu Yingru , Xie Kun , He Shaoyao
Published: September 2019

Graph convolutional neural networks (GCNN) have become an increasingly active field of research. It models the spatial dependencies of nodes in a graph with a pre-defined Laplacian matrix based on node distances. However, in many application scenarios, spatial dependencies change over time, and the use of fixed Laplacian matrix cannot capture the change. To track the spatial dependencies among traffic data, we propose a dynamic spatio-temporal GCNN for accurate traffic forecasting. The core of our deep learning framework is the finding of the change of Laplacian matrix with a dynamic Laplacian matrix estimator. To enable timely learning with a low complexity, we creatively incorporate tensor decomposition into the deep learning framework, where real-time traffic data are decomposed into a global component that is stable and depends on long-term temporal-spatial traffic relationship and a local component that captures the traffic fluctuations. We propose a novel design to estimate the dynamic Laplacian matrix of the graph with above two components based on our theoretical derivation, and introduce our design basis. The forecasting performance is evaluated with two realtime traffic datasets. Experiment results demonstrate that our network can achieve up to 25% accuracy improvement.
Deep Reinforcement Learning for Syntactic Error Repair in Student Programs
Authors: Gupta Rahul , Kanade Aditya , Shevade Shirish
Published: September 2019

Novice programmers often struggle with the formal syntax of programming languages. In the traditional classroom setting, they can make progress with the help of real time feedback from their instructors which is often impossible to get in the massive open online course (MOOC) setting. Syntactic error repair techniques have huge potential to assist them at scale. Towards this, we design a novel programming language correction framework amenable to reinforcement learning. The framework allows an agent to mimic human actions for text navigation and editing. We demonstrate that the agent can be trained through self-exploration directly from the raw input, that is, program text itself, without either supervision or any prior knowledge of the formal syntax of the programming language. We evaluate our technique on a publicly available dataset containing 6975 erroneous C programs with typographic errors, written by students during an introductory programming course. Our technique fixes 1699 (24.4%) programs completely and 1310 (18.8%) program partially, outperforming DeepFix, a state-of-the-art syntactic error repair technique, which uses a fully supervised neural machine translation approach.
Traffic Updates: Saying a Lot While Revealing a Little
Authors: Krumm John , Horvitz Eric
Published: September 2019

Taking speed reports from vehicles is a proven, inexpensive way to infer traffic conditions. However, due to concerns about privacy and bandwidth, not every vehicle occupant may want to transmit data about their location and speed in real time. We show how to drastically reduce the number of transmissions in two ways, both based on a Markov random field for modeling traffic speed and flow. First, we show that a only a small number of vehicles need to report from each location. We give a simple, probabilistic method that lets a group of vehicles decide on which subset will transmit a report, preserving privacy by coordinating without any communication. The second approach computes the potential value of any location’s speed report, emphasizing those reports that will most affect the overall speed inferences, and omitting those that contribute little value. Both methods significantly reduce the amount of communication necessary for accurate speed inferences on a road network.
From Support Propagation to Belief Propagation in Constraint Programming
Authors: Pesant Gilles
Published: September 2019

The distinctive driving force of constraint programming to solve combinatorial problems has been a privileged access to problem structure through the high-level models it uses. From that exposed structure in the form of so-called global constraints, powerful inference algorithms have shared information between constraints by propagating it through shared variables’ domains, traditionally by removing unsupported values. This paper investigates a richer propagation medium made possible by recent work on counting solutions inside constraints. Beliefs about individual variable-value assignments are exchanged between contraints and iteratively adjusted. It generalizes standard support propagation and aims to converge to the true marginal distributions of the solutions over individual variables. Its advantage over standard belief propagation is that the higher-level models featuring large-arity (global) constraints do not tend to create as many cycles, which are known to be problematic for convergence. The necessary architectural changes to a constraint programming solver are described and an empirical study of the proposal is conducted on its implementation. We find that it provides close approximations to the true marginals and that it significantly improves search guidance.
Seismic behaviour of reinforced concrete frames with steel-plate shear walls
Authors: Gholhaki Majid , Barhemat Rojyar , Rezaifar Omid
Published: September 2019

This paper describes an investigation carried out on the behaviour of buildings with a dual lateral load-resisting system, comprising a reinforced concrete (RC) moment frame and steel plate shear walls (SPSW), subject to near-fault (NF) and far-fault (FF) earthquakes. Experimental validation of a one-bay, three-storey, RC frame with SPSWs was done using structural analysis software. The seismic performance of four buildings with various numbers of storeys was then compared using finite-element software. The non-linear dynamic behaviour of the four building was also modelled. Based on the results, it was found that the standard seismic design spectrum defined by Iranian Code of Practice for Seismic Resistant Design of Buildings does not satisfy all structural demands developed by NF earthquakes. The spectrum should be modified, especially for areas near active faults. The results also revealed that the impact of FF earthquakes on low- to mid-rise structures is more profound compared to that of NF earthquakes. Conversely, it was also found that NF earthquakes have greater impacts on taller buildings than that of the FF motions.
Application of the game “drugs knowledge in action” as biochemical education strategies
Authors: Tavares C. D.A. , Fernandes V. B. , Albuquerque V. R.P. , Cavalcante T. R. , Oliveira M. S.C.
Published: September 2019

INTRODUCTION: Different learning methods can be used to better assimilate program content. The biochemical mechanism of drugs in our body generally converts lipophilic chemical compounds into products more readily excreted. Its rate is an important determinant of the duration and intensity of the drug's pharmacological action. OBJECTIVES: To show the effect of drugs on the body through play as a teaching-learning tool. METHODOLOGY: For this understanding was applied a game for students of the 5th. Semester of Chemistry, in the discipline of Supervised Internship of the semesters of 2018.1 and 2019.2, totaling 24 participants. The game "Drugs Knowledge in Action" consists of 110 cards. It consists of a deck with three types of cards, drug effects, drug image and drug chemical formula. Each participant (in all 4) received five cards, consisting of three sets of different drug titles. The winner was the one who formed the three sets first.Each participant resorted to the block of cards and retired until it had at least 9 cards in the hand, when exceeding that number, the other cards should be discarded. RESULTS AND DISCUSSION: Biochemical action maps of these drugs were constructed throughout the game. When questioned with the application of a quick QUIZ on the subject, 57% reponed that they were not aware of the chemical formula of the drugs in question. When it came to the effects of these drugs, 89% said they knew them, but some effects are common to two or more drugs. As for drug metabolism in the body only 35% of the participants knew this subject. The majority of the group 87% stated that they have clarified many doubts on the subject. During the game participants exchanged many ideas and concepts about metabolism of drugs. CONCLUSION: The applied game and other methodologies offer greater knowledge to the students and concretely strengthen their learning.
Z KUŞAĞI İLE İLGİLİ ARAŞTIRMA EĞİLİMLERİNİN VE EĞİTİME YÖNELİK KATKILARININ ANALİZİ
Authors: TAŞLIBEYAZ Elif
Published: September 2019

Son yıllarda adını sıklıkla duyduğumuz Z kuşağı, günlük
hayatın hemen her noktasında yaygın olarak kullanılan teknolojiler ile iç içe
yaşanan bir zaman diliminde doğan ve bunun getirdiği çeşitli özellikleri içinde
barındıran bir kuşağı ifade etmektedir. Bu konuda son yıllarda çok çeşitli
alanlarda çalışmalar yapılmış ve Z kuşağının özellikleri araştırılmıştır. Bu
çalışmada Z kuşağı ile ilgili çalışmalar; farklı yönleriyle –yayınlandığı yıl,
konu, yöntem, amaç, Z kuşağı özellikleri, elde edilen sonuçlar, öneriler ve
eğitim alanında Z kuşağı- incelenmiştir. İncelemede betimsel içerik analizi yöntemleri
kullanılmıştır. Öncelikle yayın başlığında “z kuşağı”, “net-generation”, “i-generation”
anahtar kelimeleri bulunan 131 makale elde edilmiş, daha sonra ön analizler
yapılarak araştırma amacına uygunluğuna ve elde edilebilirliğine göre makale
sayısı 85’e düşürülmüştür. Çalışmalardan elde edilen bulgulara göre; z kuşağına
yönelik olarak yapılan araştırmalarda en çok makale sayısına 2017 yılında
ulaşıldığı görülmüş, bu çalışmaların en çok öğrenme profili üzerinde yapıldığı ortaya
çıkmıştır. Ayrıca çalışmaların amaçlarının genellikle z kuşağının kritik
özelliklerinin belirlenmesine odaklandığı, bu araştırmaların daha çok nicel
olduğu ve sonuçlarda Z kuşağında yer alan bireylerin teknoloji kullanma
eğilimlerinin diğer dijital yerlilere oranla daha fazla olduğu görülmüştür. Z
kuşağının ihtiyaç duyduğu ortamlar tasarlanırken bilgiye hızlı erişme, liderlik
ve duyarlılık gibi kendilerine özgü niteliklerinin göz önünde bulundurularak
teknoloji tabanlı araçlardan faydalanılması gerektiği sonucuna varılmıştır.
TURİZM İŞLETMELERİNDE İÇERİDEN ÖĞRENENLERİN İŞLEMLERİ: NEW YORK BORSASI ÖRNEĞİ
Authors: ESEN M. Fevzi , ACAR Ayşegül , KOCABAŞ Eda
Published: September 2019

Finansal piyasalarda yatırımcıların güvenini sarsan ve
piyasa işleyişini değiştiren içeriden öğrenenler ticareti, son yıllarda beyaz
yakalıların karıştığı ve en çok artış gösteren finansal suçların başında
gelmektedir. Bu çalışmada, turizm literatüründe içeriden öğrenenler ticareti
ilk defa ele alınmış olup; turizm alt endüstrilerinde faaliyet gösteren ve
borsaya kote olmuş işletmelerin yönetici ve çalışanlarına ilişkin hisse senedi
alım ve satım işlemleri betimsel olarak incelenmiştir. Bu kapsamda, Ocak 2008
ile Aralık 2016 arasında New York borsasına (NYSE) kote olmuş konaklama,
seyahat, rekreasyon ve yiyecek- içecek alanında faaliyet gösteren toplam 227
işletmede, 1891 içeriden öğrenen tarafından gerçekleştirilen 35.205 adet hisse
senedi alım ve satım işlemi tanımsal olarak değerlendirilmiştir. Çalışma
sonucunda, turizm işletmelerindeki içeriden öğrenenlerin yüksek hacimli
işlemler gerçekleştirdikleri, NYSE yıllık getirisinin en yüksek olduğu yılı
takip eden 2014 yılında içeriden öğrenenlerin toplam işlem sayısının en yüksek
seviyeye ulaştığı; en yüksek miktarda ve hacimde gerçekleştirenlerin konaklama
işletmelerindeki içeriden öğrenenler olduğu tespit edilmiştir. Ayrıca, çeşitli
yönetici sınıflarında içeriden öğrenenlerin işlem özelliklerinin farklılaştığı
sonucuna ulaşılmıştır.
PERS (AKHAİMENİD) BAĞLAMINDA SAKALAR
Authors: DURAN Muzaffer
Published: September 2019

Bu
çalışmanın amacı Pers (Akhaimenid) döneminde Saka-Pers münasebetlerini
incelemektir. Bu hususta öncelikle Sakaların başta Akhaimenid yazılı ve
arkeolojik kaynaklarında, Yunan yazarların eserlerinde nasıl tasvir edildiğini
açıklamaya çalıştık. Bunu yaparken Akhaimenid dönemine ait olan ve Sakaları tasvir
eden en eski Saka görsellerini sunmaya çalıştık. Şimdiye kadar genellikle
Saka-Pers savaşları üzerine birçok kıymetli çalışma yapılmıştı. Biz bu makalede
Saka-Pers savaşlarının yanında Sakaların Perslerle olan “müttefiklik”
ilişkilerini de göstermeyi amaçladık. Yöntem olarak Akhaimenid kitabeleri, bazı
Assur vesikaları ve antik Yunan metinleri ile Sakaları betimleyen Akhaimenid
rölyeflerini, mezarlar üzerindeki figürleri ve kurganlardan çıkarılan bazı
arkeolojik malzemeleri kullandık. Çalışmamızda Sakaları temsil eden birçok
grubun olduğunu, Sakaların Akhaimenidlerden önceki dönemlerde İran coğrafyası
ile temasa geçtiğini, erken Akhaimenid döneminde Perslerle düşmanca
münasebetleri olduğunu, Kserkses ile birlikte Sakalarla Perslerin omuz omuza
çarpıştığını belirledik. Son olarak Perslerin gerek Yunan savaşlarında gerek
Büyük İskender ile yaptığı savaşlarda mağlup olmasına rağmen Pers ordusundaki
Sakaların rakiplerine karşı daima üstünlük sağladığını tespit ettik.
TRAVMA GEÇİREN BİREYLERİN SPİRİTÜEL İYİ OLUŞLARININ TRAVMA SONRASI BÜYÜMELERİ ÜZERİNE ETKİSİ
Authors: UĞURLUOĞLU Dilruba , ERDEM Ramazan
Published: September 2019

Bireylerin kendilerinin yahut yakınlarının yaşadığı
sağlık sorunu, kaza, ölüm, boşanma, aldatılma, taciz, tecavüz vb. travmatik
olaylar bireylerde olumlu veya olumsuz etkilere yol açabilmektedir. Travma
sonrası büyüme, bireylerin başlarından geçen travmatik olaylar sonrası
kişilerarası ilişkilerinde, kendilik algılarında, yaşam felsefelerinde
yaşadıkları olumlu değişim ve dönüşümleri ele alan bir kavramdır. Bireylerin
travmatik olay sonrası yaşayacakları dönüşüm kişilik özellikleri, manevi
duygular, hayata bakış açısı, kültür vb. unsurlardan etkilenmektedir. Bu
bağlamda bireylerin hayatı anlamlandırmasında ve geliştirdiği davranışlarda etkili
olan, bireyin değer yargıları üzerinde rol oynayan spiritüel iyi oluş
kavramının travma sonrası büyüme üzerinde etkisinin olup olmadığı merak
uyandıran bir konu olmuştur. Çalışma kapsamında travmatik bir olay yaşamış
bireylerin travma sonrası büyüme ve spiritüel iyi oluş düzeyleri tespit
edilerek, bireylerin spiritüel iyi oluşlarının travma sonrası büyümeleri
üzerindeki etkileri incelenmiştir. Araştırma sonucunda spiritüel iyi oluş
düzeyinin bireylerin travma sonrası büyümeleri üzerinde etkili olduğu tespit
edilmiştir. Bireylerin doğaya saygı duyma, uyumla yaşama ve aşkın bir gücün
varlığına inanma durumlarının yaşadıkları travmatik olay sonrası gelişim
gösterme düzeyleri üzerinde pozitif bir etkiye sahip olduğu neticesine
varılmıştır. Yine çalışma sonucunda sağlık problemi yaşayan bireylerin diğer
travmatik olaylara maruz kalan bireylere kıyasla duygularını ifade etme,
kişilerarası ilişkilerinde olumlu tavırlar sergileme ve yaşamın kıymetini
anlama noktalarında daha fazla gelişme gösterdiği tespit edilmiştir. Son
olarak, bireylerin yaşadıkları travma sonrasında en çok inanç sistemlerinde
değişim ve gelişim gösterdikleri çalışma kapsamında ortaya konulmuştur.
Narrativa esportiva de MOBA: que gênero é esse?
Authors: De Souza Danilo Sobral , Pereira Márcia Helena De Melo , Ventura Adilson
Published: September 2019

O presente artigo apresenta resultados de uma investigação sobre a narrativa esportiva de MOBA considerada aqui enquanto um novo gênero discursivo. Nosso objetivo é investigar esse gênero tendo em vista seus aspectos temáticos, composicionais e estilísticos. Para tanto, lançamos mão dos conceitos bakhtinianos sobre dialogismo e gênero discursivo. O corpus foi composto de dois excertos de narrativas esportivas de League of Legends, realizadas no Brasil: uma em um campeonato e outra em um programa de televisão. Para a construção da análise, estabelecemos paralelos com a narração de futebol, a fim de entender as especificidades da narrativa esportiva de MOBA. Como conclusão, apontamos que as características principais da narrativa de MOBA, enquanto elementos que particularizam essa instância comunicativa, são o aspecto multifocal do olhar do narrador e o controle do espectador.
Structure and properties of layer, surfaced on HARDOX 450 steel by boron containing wire
Authors: Ivanov Yu. F. , Gromov V. E. , Romanov D. A. , Klopotov A. A. , Rubannikova Yu. A.
Published: September 2019

Analysis of structure phase states and properties of the layers formed on HARDOX 450 low alloy steel by welded-on wires with boron content of 4.5 and 6.5 % wt. was made by the methods of modern physical material science. In the initial state HARDOX 450 steel has the structure of tempered martensite, in the volume and along the boundaries of crystals of it the cementite particles are located. The particles located in the volume have acicular shape and those along boundaries are mainly round. The presence of extinction bend contours has been revealed, indicative of the curvature torsion of crystal lattice of the material’s portion. They originate and finish on the interfaces of martensite crystals. Scalar density of chaotically located dislocations and forming the netlike substructure is 6.2·1010 cm–2. The layer welded on HARDOX 450 steel has microhardness increasing by more than two-fold that of the base. Analysis of state diagrams of Fe – C, Fe – B, B – C systems and polythermal cross–sections in Fe – C – B system has shown that the rapid cooling of Fe23C6 – Fe23B6 alloys from liquid state would facilitate the formation of multiphase structural states. It is stated by the methods of transmission electron diffraction microscopy that the reasons for the high microhardness level of the surface layers are the following: formation of iron borides and crystals of ultafine-dispersion (up to 100 nm) packet martensite with high level (~1011 cm–2 ) of scalar density of dislocations; presence of nanodimentional particles of iron and boron carbides in the volume and on the boundaries of martensite crystals; high level of curvature torsion of crystal lattice of iron borides and α-phase grains, caused by the internal stress fields along interphase (interface of iron boride crystals and α-phase grains) and intraphase boundaries (interface of iron borides and martensite crystals packet). Increase in boron concentration from 4.5 to 6.5 % is accompanied by the sufficient increase (by 1.2 – 1.5 times) in hardness of welded layer. It is caused by the increase of dimensions and relative content of iron boride regions by 1.5 – 2.0 times.
Calculation of changes in specific volumes of Fe – C system alloys depending on carbon content and temperatures
Authors: Gabelaya D. I. , Kabakov Z. K. , Mashchenko M. A.
Published: September 2019

The work presents a new technique for determining the temperature dependence of the alloy specific volumes in Fe – C equilibrium system based on known from the literature calculated and empirical dependence for account of the phases’ specific volumes. These data were based on the independent reports of S.F. Yuryev and were obtained for temperatures below 1200 °C. When using these forms at temperatures above 1200 °C, the specific volume of austenite exceeds specific volume of ferrite. However, it is known that austenite has the smallest specific volume among all phases of the Fe – C system. In this regard, in the field of high temperatures, it is proposed to use other dependences that do not contradict the physics of polymorphic and phase transformations in this system. Thus the authors have obtained the general expressions for calculating the alloys’ specific volumes separately for three intervals of carbon concentrations in which the change in shares of the temperature phases are calculated according to Fe – C equilibrium diagram using the lever relation. As an example, results of the calculated determination of specific volumes of alloys with carbon vontent of 0.05, 0.13 and 0.33 % in the temperature range of 20 – 1600 °C are considered. The presented results are compared with the results obtained with the help of the phase diagram calculation package JMatPro®, on the basis of which the adequacy of the proposed calculation method was established. The developed technique can be used to calculate not only specific volumes of alloys, but also their density and coefficient of linear expansion depending on temperature and carbon concentration. It is the basis for the correct use of methods for determining the size of continuous cast billets due to shrinkage in order to correctly configure the equipment of continuous casting machines.
Thermodynamic modeling of isotherms of oxygen solubility in liquid metal of Fe – Mg – Al – O system
Authors: Mikhailov G. G. , Samoilova O. V. , Makrovets L. A. , Smirnov L. A.
Published: September 2019

Studying the interaction between oxygen and magnesium and aluminum dissolved in liquid iron is an important task in order to choose optimal parameters for refining and casting of steels. Relevance of this research is caused by determining the possibility and conditions for formation of unfavorable refractory particles of magnesium oxideand magnesian spinel in a metal melt. In the course of this research, thermodynamic modeling of phase equilibria implemented in liquid metal of such systems as Fe – Mg – O, Fe – Al – O and Fe – Mg – Al – O within the temperature range of 1550 – 1650 °С was carried out. Calculation was made using the technique of constructing the solubility surfaces for the metal components which connects quantitative changes in composition of a liquid metal with qualitative changes in composition of products obtained as a result of interaction of a metallic melt’s components. The modeling method was based not only on usin­g equilibrium constants of reactions occurring between components of the systems under research in the selected temperature range, but also on taking into account the values of interaction parameters of the first order (according to Wagner) of elements in liquid iron. In order to simulate activities of the oxide melt conjugated with the metallic one, approximation of the theory of subregular ionic solutions was used. To model activities of oxides solid solution, approximation of the theory of regular ionic solutions was used. And the theory of ideal ionic solutions was used for the solid solution of spinels. In the course of the work, isotherms of oxygen’s solubility in liquid metal of systems Fe – Mg – O, Fe – Al – O and Fe – Mg – Al – O have been constructed, and regions of thermodynamic stability of oxide phases conjugated with the metallic melt have been determined. In particular, compositions area of a liquid metal which is going to be in equilibrium with the solid solution of spinels | FeAl 2 O 4 , MgAl 2 O 4 | solid solution has been determined for Fe – Mg – Al – O system. Results obtained in the course of thermodynamic modeling have been compared to experimental data.
Modeling of overloads of raising mechanism in metallurgical overhead cranes
Authors: Varlamov V. V. , Kipervasser M. V. , Gerasimuk A. V.
Published: September 2019

Electromechanical processes occurring when the load is lifted by an overhead crane are considered. The main idea of the work is to identify emergency mode (crane overload) by a method based on control of stator current of lift motor. To obtain stator current diagrams of electric motor, mathematical model of overhead crane (three-mass circuit) has been developed, which includes equations describing elastic properties of crane beams and its rope. A system of (α, β) coordinates, fixed relative to electric motor stator, is adopted to describe the drive asynchronous motor. Lifting cycle is considered as sequence of three steps: choice of the rope “slack”; rope tension; separation of cargo lifting. For each stage, a system of differential equations has been compiled describing motion of masses of overhead crane elements and electrical parameters of electric motor. Initial and boundary conditions for each of the stages were determined. Preliminary transformations of the system of equations to their solution by numerical methods and subsequent modeling of stages of lifting loads were carried out for different weights. Sequential solution of three boundary value problems allows obtaining values of stator currents at time of load separation. Diagrams of stator phase currents of an electric motor were obtained for loads of different mass. Simulation results indicate the presence of fixable difference in magnitudes of stator currents after the load is separated from the support surface. On basis of the developed model and the study results, a functional diagram of crane overload protection device is proposed and its principle of operation is described. It consists in controlling lifted load mass and stator current when liftingthe load. Conclusion is made about feasibility and effectiveness of monitoring electrical values of lifting motor for development of overhead crane protection against overloads. Effectiveness of the proposed system was evaluated.
10 simple rules for writing Selenium automated tests v1
Authors: Bassi Sebastian
Published: September 2019

Some advices regarding writing Selenium tests. The examples are in Python but the rules are language agnostic, so it can be implemented in any supported language.
MojoSort™ Human CD14+ Monocyte Isolation Kit Column Protocol v1
Authors: Li Sam
Published: September 2019

BioLegend MojoSort™ nanobeads work in commonly used separation columns, based on our internal research as well as validation by external testing by academic labs. This simple protocol consists of following the MojoSort™ protocol to label the cells with pre-diluted MojoSort™ reagents and using the columns as indicated by the manufacturer. Note: Due to the properties of our beads, it may be possible to use far fewer beads and less antibody cocktail that with other commercial suppliers. We recommend a titration to find the best dilution factor. However, as a general rule, dilutions ranging from 1:2 to 1:10 for the antibody cocktail can be used. Dilutions ranging from 1:5 to 1:20 for the Streptavidin Nanobeads can be used. Please contact BioLegend Technical Service (tech@biolegend.com) if further assistance is needed.
MojoSort™ Human NK Cell Isolation Kit Protocol v1
Authors: Li Sam
Published: September 2019

BioLegend MojoSort™ nanobeads work in commonly used separation columns, based on our internal research as well as validation by external testing by academic labs. This simple protocol consists of following the MojoSort™ protocol to label the cells with pre-diluted MojoSort™ reagents and using the columns as indicated by the manufacturer. Note: Due to the properties of our beads, it may be possible to use far fewer beads and less antibody cocktail that with other commercial suppliers. We recommend a titration to find the best dilution factor. However, as a general rule, dilutions ranging from 1:2 to 1:10 for the antibody cocktail can be used. Dilutions ranging from 1:5 to 1:20 for the Streptavidin Nanobeads can be used. Please contact BioLegend Technical Service (tech@biolegend.com) if further assistance is needed.
MojoSort™ Mouse Neutrophil Isolation Kit Column Protocol v1
Authors: Li Sam
Published: September 2019

BioLegend MojoSort™ nanobeads work in commonly used separation columns, based on our internal research as well as validation by external testing by academic labs. This simple protocol consists of following the MojoSort™ protocol to label the cells with pre-diluted MojoSort™ reagents and using the columns as indicated by the manufacturer. Note: Due to the properties of our beads, it may be possible to use far fewer beads and less antibody cocktail that with other commercial suppliers. We recommend a titration to find the best dilution factor. However, as a general rule, dilutions ranging from 1:2 to 1:10 for the antibody cocktail can be used. Dilutions ranging from 1:5 to 1:20 for the Streptavidin Nanobeads can be used. Please contact BioLegend Technical Service (tech@biolegend.com) if further assistance is needed.
UC Davis - Atheroma Quantification v2
Authors: Villablanca Amparo
Published: September 2019

Summary: Increased lipid accumulation in the artery wall and atherosclerotic lesion development are two hallmarks of atherosclerotic cardiovascular disease. Atheroma quantification and characterization assesses neutral lipid accumulation in the vessel wall, percentage of lesions per aortic segment (quantitative) and lesion morphology, complexity, and severity (qualitative). Modified from: Villablanca AC, et.al. J Cardiovasc Transl Res. 2009 Sep;2(3):289-99.
Las tretas del débil: la autotraducción como subversión lingüística patriarcal en la literatura de la escritora puertorriqueña Rosario Ferré
Authors: Sambolín-Santiago Aurora
Published: September 2019

La subversión lingüística ha sido una herramienta rupturista para muchas escritoras y escritores en toda Latinoamérica en diferentes momentos de su historia, frente al canon literario y la homogenización de las diferentes identidades nacionales. En este contexto se analiza la literatura de Rosario Ferré, quien forma parte de la Generación del 70 puertorriqueña, que impulsó conceptualizaciones sobre identidades puertorriqueñas híbridas. Estas conceptualizaciones transgredieron la identidad nacional hispanófila que algunas instituciones y organizaciones políticas isleñas habían oficializado en contraposición a los intentos colonialistas de los Estados Unidos por asimilar lingüística y culturalmente a los puertorriqueños. Dentro de este contexto, el caso de la escritora Rosario Ferré es muy especial debido a su posición político-social, su particular incursión en el mercado literario estadounidense, al publicar en un inglés “contaminado” lingüística y culturalmente por el español, y su práctica subversiva de autotraducción sobre la que elegantemente se da el lujo de teorizar en una de las tramas de su novela The House on the Lagoon (1995), que se examina en este artículo.Fecha de recepción: 30/04/2019Fecha de aceptación: 12/07/2019¿Cómo citar este artículo? Sambolín-Santiago, A. (2019). Las tretas del débil: la autotraducción como subversión lingüística patriarcal en la literatura de la escritora puertorriqueña Rosario Ferré. Mutatis Mutandis. Revista Latinoamericana de Traducción, 12(2), 475-499. doi: 10.27533/udea.mut.v12n1a07
Health related quality of life in children with cancer and chronic diseases
Authors: Yağcı-Küpeli Begül , Akın Kudret Helin , USLUOĞLU Feyruz , KÜPELİ Serhan
Published: September 2019

Purpose: Health related quality of life (HRQOL) concept is one of the major outcome measures in management of chronic diseases in children. Herein we aimed to review HRQOL by using PedsQL Generic Core Scales in children with cancer and chronic diseases.  Materials and Methods: All patients with cancer under treatment (oncology group), attention deficit hyperactivity disorder (ADHD), nephrological disorders like recurrent urinary tract infections and other endocrinologic disorders such as precocious puberty and growth retardation and their parents who gave consent were included in the study. Turkish version of PedsQL 4.0 Generic Core Scales self and parent proxy-reports were used for all patients of 8-12 and 13-18 years of age.Results: There were 48 children in oncology group; 44 in non-oncology group. The most common diagnoses were leukemia, non-Hodgkin lymphoma and brain tumors in the oncology group. Children reported significantly higher scores in the school subscale and physical functioning subscale, psychosocial functioning, and total scale scores in the non-oncology group compared to patients with cancer. A strong positive significant correlation was detected between all subscales except for social functioning scores of children and parents in child self-report and parent proxy-report correlations. Conclusion: Cancer is a devastating disease that impair functioning more than other chronic diseases in all areas of life of children and parents. PedsQL Genereric Core Scales is a usefull tool for evaluating HRQOL in both cancer and other chronic diseases.
Effect of Health Promoting Lifestyle Education Program on reducing the menopausal symptoms of women in Turkey
Authors: KOÇAK Derya Yüksel , KIZILKAYA BEJİ Nezihe
Published: September 2019

Purpose: This study aimed to determine the effect of health-promoting lifestyle education given to menopausal women in accordance with Pender’s Health Promoting Model (HPM) on reducing the menopausal symptoms.Materials and Methods: This study is a semi-experimental research with pre-test and post-test control groups. In the first stage of the study, Socio-demographic Information Form (SIF) and Menopause Rating Scale (MRS) were applied to 401 menopausal women to determine the severity of their menopausal symptoms. In the second phase of the study, women with intense menopausal symptoms were randomly divided into two groups. 32 menopausal women in initiative group and 32 menopausal women were in the control group. One group, the experimental group, received Health-Promoting Lifestyle Education (HPLE), while the other group was the control group. Menopause Rating Scale (MRS), Health Promoting Lifestyle Profile II (HPLP II), and Self-Efficacy Scale (SES) were applied as pretests in both groups. Health-promoting lifestyle education was given to the experimental group twice with a one-week break between the sessions and the sessions were completed in four weeks.Results: Statistically significant decreases were found in the total MRS scores and subdimension scores of the menopausal women in experimental group after the education.Conclusion: Health-promoting lifestyle education was found to be effective in reducing the severity of menopausal symptoms.
A produção de vídeos tutoriais como recurso didático: uma experiência com alunos do médio integrado no componente curricular Desenho
Authors: De Oliveira Gomes Martins Thiago Luiz , De Sousa Cavalcanti Ricardo Jorge
Published: September 2019

This study deals with teaching and learning practices in vocational education and training (VET) in the Brazilian context. The objective of the research was to problematize the production of tutorial videos, as didactic resource - pedagogical, in the discipline “Drawing”, in a class of a higher secondary technical-professional education course. This is a particularly interesting topic due to the lack of teaching materials related to VET and the difficulties of using manual technical drawing instruments (and procedures execution ) observed in this discipline. The qualitative study adopted the action research method and was structured in three stages: video production, analysis of the video production process and intervention analysis. Held at the Federal Institute of Alagoas, Santana do Ipanema Campus, the research was carried out with students from the 1st grade of the Technical Course in Agriculture. Data collection focused on the written record and the application of two questionnaires: before and after the videos were produced. Participants rated positively the teaching experience they had. Our reflections suggest integration between the production of tutorial videos and the development of reflective teaching and learning practices. Thus, it is believed that the production of tutorial videos was positively constituted as a relevant didactic-pedagogical resource to the discipline “Drawing”.
Colaboração para a integração entre o IFPB-Campus Cabedelo e a comunidade externa através de ações educomunicativas
Authors: Santos Fabianne , Campos Bruna , Nicolau Vítor , Farias Rebeca
Published: September 2019

The quality of education is fundamental to the socioeconomic development of a country. It is linked to the percentage of Gross Domestic Product (GDP) earmarked for the area, and also to the expansion of good educational practices, just like the methodology of educommunication, an interdepartmental approach to some disciplines such as: The use of media in education, production of educational content and Epistemological and experimental practices of concepts,which encourage students to participate more actively in debating problems. The present research proposes, therefore, to assist the teaching-learning process of students of the Multimedia Technical Course (CTIM) of the Federal Institute of Education, Science and Technology of Paraíba (IFPB - Campus Cabedelo) and its integration with the community, exchanging experiences with public school students through educational media. The method was divided into steps ranging from knowledge to production. During the National Extension Meeting of the IFPB 2017 (ENEX), a game and fanzine developed by the CTIM was presented to the students of the State Elementary and Secondary School Izaura Falcão de Carvalho (Lucena-PB). There, we could see students’ interest in the topics discussed (content of subjects and information about ENEX). We also saw the contribution of this work to the practice in the classroom.
INVASÃO BIOLÓGICA NO PARQUE NACIONAL DO CATIMBAU, PERNAMBUCO, BRASIL
Authors: Da Silva Francielly Oliveira , Fabricante Juliano Ricardo
Published: September 2019

O processo de invasão biológica é considerado a segunda maior causa de perda da biodiversidade do planeta, perdendo apenas para atividades antrópicas, como o desmatamento. O presente trabalho teve como objetivo realizar um inventário das plantas não nativas do Parque Nacional do Catimbau, Pernambuco. O Parque Nacional do Catimbau localiza-se no Estado de Pernambuco e abrange uma área de 62.300 ha, dentro dos limites dos municípios de Tapanatinga, Ibimirim e Buíque. O inventário foi realizado por meio de busca ativa. As espécies foram categorizadas em exóticas, naturalizadas ou exóticas invasoras. Foram amostradas 18 espécies distribuídas em 16 gêneros e nove famílias. A família com maior número de representantes foi Poaceae. A invasão biológica no Parque Nacional do Catimbau é um problema evidente que requer atenção especial pois, essas espécies causam sérios danos a biodiversidade local, diminuindo a área de preservação das espécies nativas.
Hierarchical Adaptive Control System of a Manipulator Based on the Synthesis of a Neural Network of Fuzzy Inference and an Iterative Refinement Algorithm
Authors: Ganin P.E. , Kobrin A.I.
Published: September 2019

The main aim of this work is to develop an adaptive control system for a kinematically redundant multilink industrial manipulator. Proposed solution allows to construct a unified real-time control system with the ability to control the accuracy of calculations. In order to achieve the required accuracy of the calculations and the performance of the control system, we propose an algorithm that is based on the so-called hybrid method for finding the solution of the inverse kinematics (IK) problem, including the adaptive neural network and fuzzy inference system with subsequent iterative refinement of numerical solution by the Newton --- Raphson method. The influence of the training sample size on the quality of the obtained initial approximation for the neural network part of the algorithm is described in the paper. The results of experimental studies of the developed hybrid algorithm are presented in comparison with the iterative and neural network methods for three-, five- and eight-link manipulator structures. Paper presents the main steps of the control system synthesis for kinematically redundant industrial manipulator, including the description for developed algorithms for finding an IK solution of multilink structures. The structure of a multi-level hierarchical manipulator control system, based on a programmable logic controller and electric stepping motors with the possibility of integration into the production system at various levels, is presented.
Effect of the Main Rotor and Other Helicopter Design Features on the Performance of Satellite Radionavigation System User Equipment Mounted on the Craft
Authors: Zubov N.E. , Eshchenko A.A. , Demin S.S. , Maslennikova G.E. , Ivanenko S.V.
Published: September 2019

We analysed how signal diffraction caused by the main rotor, signal reflection from helicopter components, and receiver antenna shielding by the main rotor blades affect the signal-to-noise ratio in the correlator band of satellite radionavigation system user equipment for GLONASS and GPS, its navigation precision and error probability when transmitting overhead information from navigation spacecraft to the helicopter. The investigation showed that the effect of helicopter design on the performance of user equipment mounted on it manifests as antenna shielding and diffraction waves appearing at the edges. The presence of diffraction waves and reduction in the original signal amplitude as a result of shielding the user equipment antenna leads to the Bit Error Rate in the overhead information transmission channel increasing by one or two orders of magnitude. Effect on navigation accuracy is negligible.
Effect of Turbulent Flame Propagation Velocity and Zone Width on the Unburnt Hydrocarbon Concentration and Combustion Efficiency in a Spark-Ignition Engine
Authors: Shaykin A.P. , Galiev I.R.
Published: September 2019

The investigation considers how combustion efficiency and exhaust gas (unburnt hydrocarbon) toxicity are linked to the fundamental flame propagation characteristics (flame propagation velocity and reaction zone width). We present combustion efficiency and unburnt hydrocarbon concentration as functions of fundamental flame propagation characteristics, maximum flame temperature, flame failure temperature and thickness of the unburnt fuel layer adjacent to the combustion chamber walls. Comparing combustion efficiency computed according to the equation proposed to combustion efficiency derived by using an experimentally obtained indicator diagram showed that the data are in good agreement. We studied the connection between unburnt hydrocarbon emission and combustion efficiency. We detected that increasing combustion efficiency leads to lower unburnt hydrocarbon emission, which is explained by reduction of the unburnt fuel ratio in the layer adjacent to the wall. We propose a new technique for calculating unburnt hydrocarbon amount in engine exhaust gases. We show that our technique makes it possible to determine the chemical composition of the air-fuel mixture and the values of flame propagation characteristics that ensure a decrease in unburnt hydrocarbon emission. The results of our study may be used to develop or refine methods of increasing combustion efficiency of composite fuels and reducing exhaust gas toxicity in combustion chambers of internal combustion engines and other power plants.
Zabytkowa Linia Tramwajowa we Wrocławiu – analiza oferty turystycznej z punktu widzenia turystyki miejskiej
Authors: Kołodziejczyk Krzysztof
Published: September 2019

Celem autora artykułu jest ocena funkcjonowania turystycznej linii tramwajowej we Wrocławiu w 2018 r. pod względem atrakcyjności oferty dla turystów, zainteresowania przejazdami oraz kosztów i opłacalności jej utrzymania, by ostatecznie wskazać pewne ogólne wnioski dotyczące obecności tego typu oferty w turystyce miejskiej. Zakres czasowy, uwzględniony w analizie w niniejszej pracy, jest szczególnie ważny, ponieważ rozszerzenie liczby przewoźników z jednego do dwóch pozwoliło na wprowadzenie wielu zmian w ofercie. Na podstawie danych ze sprzedaży biletów można stwierdzić, że linia cieszy się największą popularnością w lipcu i sierpniu, choć nawet wtedy średni odsetek zajętych miejsc siedzących jest niższy niż 50%. Kursy z przewodnikiem są nieco mniej popularne niż przejazdy bez niego. W związku z tym w pracy przedstawiono pewne propozycje, które mogą przyczynić się do zwiększenia zainteresowania linią, takie jak wydłużenie czasu kursowania (w ciągu dnia i w skali roku) czy wprowadzenie nowych rodzajów biletów lub dodatkowych atrakcji.