bluuebunny/crossref_metadata_2025 huggingface dataset:
PERAN MODEL PEMBELAJARAN COOPERATIVE INTEGRATED READING AND COMPOSITION (CIRC) DALAM MENINGKATKAN HASIL BELAJAR SISWA SEKOLAH DASAR
Authors: Abustang Perawati Bte , Jusmawati Jusmawati , Megawati Megawati
Published: June 2021

Penelitian ini bertujuan untuk meningkatkan Hasil Belajar Bahasa Indonesia Melalui Model pembelajaran Cooperative Integrated Reading And Composition (CIRC) Siswa Kelas V SD Inpres Bangkala II Kota Makassar. Pendekatan yang digunakan ini adalah pendekatan kualitatif dengan jenis penelitian Yaitu Penelitian Tindakan Kelas (PTK). Subjek penelitian ini adalah siswa kelas V SD Inpres Bangkala II Kota Makassar dengan jumlah siswa 28 orang. Instrumen penelitian ini yaitu, observasi, dokumentasi dan tes. Hasil penelitian ini menunjukkan adanya peningkatan hasil belajar Bahasa Indonesia dimana hasil belajar pada siklus I memperoleh nilai dengan persentase 25% dan pada siklus II memperoleh nilai dengan persentase 86% dan dikategorikan sangat baik. Berdasarkan hasil penelitian tersebut disimpulkan bahwa penerapan model pembelajaran Cooperative Integrated Reading And Composition (CIRC) pada mata pelajaran Bahasa Indonesia telah meningkatkan hasil  belajar siswa kelas V SD Inpres Bangkala II Kota Makassar.
PENGARUH KECERDASAN LOGIS MATEMATIS HASIL BELAJAR MATEMATIKA SISWA KELAS VII SMP NEGERI 2 SESENAPADANG KAB.MAMASA
Authors: Mengan Mengan , Jeranah Jeranah , Hadi Abdul
Published: June 2021

Penelitian ini bertujuan untuk mengetahui pengaruh kecerdasan logis matematis terhadap hasil belajar matematika siswa kelas VII SMP Negeri 2 Sesenapadang Kabupaten Mamasa. penelitian ini adalah penelitian ex-post facto. Populasi dari penelitian ini adalah seluruh siswa kelas VII SMP Negeri 2 Sesenapadang yang terdiri dari satu kelas dengan jumlah 25 siswa sekaligus menjadi sampel penelitian. Data hasil penelitian dianalisis dengan menggunakan analisis deskriptif dan inferensial. Dari hasil pengolahan data menunjukkan bahwa kemampuan kecerdasan logis matematis siswa kelas VII SMP Negeri 2 Sesenapadang dikategorikan tinggi, berada pada interval  Dengan nilai rata –rata sebesar 80,60 dan standar deviasi 10,992. Kemudian hasil belajar matematika siswa kelas VII SMP Negeri 2 Sesenapadang dikategorikan tinggi, berada pada interval 75 – 89 dengan nilai rata–rata 70,160 dan standar deviasi 1,61366. Kemudian persamaan regresinya adalah . Hasil statistik inferensial menunjukkan bahwa kecerdasan logis matematis berpengaruh positif terhadap hasil belajar matematika siswa kelas VII SMP Negeri 2 Sesenapadang dengan kontribusi 67,8%.
Televizyon Haber Bültenlerindeki İşaret Dili Çeviri Hizmetine Yönelik Sağır Topluluğun Tutum Ve Beklentileri
Authors: DOĞAN Caner
Published: June 2021

Sağırların, işitme ve görme engellilerin yayın hizmetlerine erişiminin iyileştirilmesine ilişkin usul ve esaslar hakkındaki RTÜK yönetmeliği, 2019 yılı Ekim ayında Resmî Gazete’de yayımlanmıştır. Söz konusu yönetmeliğe göre, yayıncı kuruluşlar ana haber bültenlerinden birini günlük olarak işaret diliyle yayımlamaları gerekmektedir. Türkiye'de 5'den fazla televizyon kanalı, işaret dili çevirmenliği ile haber yayınlamakta ve bunu Sağır bireyler için erişilebilir, kamu erişilebilirlik biçimlerinden biri haline getirmektedir. Görsel – İşitsel Türk İşaret Dili Çevirmenliğinin ülkemizde arzu edilen oranda yaygın olmadığı bilinmektedir. Bu boşluğu doldurmak için sağır bireylerin televizyon içeriklerine erişmeleri konusunda seçenek sunulması gerekmektedir. Bu çalışmanın amacı ülkemizdeki televizyon haber bültenlerindeki Türk İşaret Dili çeviri hizmetlerinin hem teknik hem de çeviri kalitesi açısından değerlendirilmesi ve toplumdaki sağır bireylerin beklentilerinin belirlenmesidir. Televizyon haber bültenlerinin Türk İşaret Dili çevirilerinde, Sağır topluluğun çevriyi kavramasını olumsuz etkileyen faktörleri belirleyen bu çalışmada, veri toplamak amacıyla yapılan araştırma sürecinde çalışmaya gönüllü olarak katılan 1068 sağır bireye toplam 79 sorudan oluşan anket uygulanmıştır. Çalışmada çevrimiçi anket yöntemi kullanılmış olup alınan yanıtlar değerlendirilmiştir. Araştırma sonucunda, Sağır izleyicinin işaret dili tercümanlarının çevirilerini anlamakta zorlandığı tespit edilmiştir. Bu analiz, çevirmenlerin Türk İşaret Dili akıcılığındaki eksikliklerinin Sağır bireylerin daha az anlamalarına sebep olduğuna katkıda bulunmuştur. Hedeflenen amaca ulaşılmadığı sonucuna varılmıştır. Bu sonuca göre ülkemizdeki Sağır bireylerin beklentileri karşılanamamaktadır.
Identifying the Factors Affecting Second-Home Purchase Decisions of Foreigners in Turkey
Authors: Üngüren Engin , Kaçmaz Yasar Yiğit
Published: June 2021

Turkey has been among the most preferred
countries by foreigners for purchasing a “second home” (SH) since the beginning
of the 2000s. This explorative and descriptive study aims to determine the
factors which affect the purchasing behaviors of foreigners who have bought an SH
in Turkey in the framework of nationalities. The study employed a sequential mixed
method, which included quantitative and qualitative aspects. As a result of the
qualitative research, it was found that the factors affecting the decisions of
foreign residents to purchase a home in Alanya were grouped under four main
themes and twelve subthemes. A quantitative method was conducted based on the
results of the qualitative research as well as the literature review. The
results of the study show that the SH purchasing behavior of foreigners and their
intentions of purchasing are significantly differentiated according to
nationalities. This study contributes insight into the issue of the SH buying behavior of
foreigners and presents marketing and managerial implications.
Does Consumer Need for Uniqueness Influence Travel Decision-Making?
Authors: Dey Banasree , Mathew Jones , Srivastava Shalini
Published: June 2021

The present paper aims to assess the
impact of Consumer Need for Uniqueness (CNFU) in tourists on travel
decision-making, particularly, with regard to preferred destination types and
activity preferences. The impact of self-attributed need for uniqueness (SANU)
in moderating the aforementioned relationships is also examined. The data has
been collected using a cross sectional survey on a sample of 288 tourists from
various destinations in India. The hypotheses were tested through CFA and SEM
using SPSS. The findings indicate that an individual with more need for
uniqueness, both as a psychological trait and as a consumer disposition, may
prefer unique destinations and unique activities in comparison to those with
lower SANU and CNFU. This has important implications for travel and tourism
marketers who may appeal to the NFU trait in tourists while promoting travel
destinations and activity packages that provide unique, curated experiences for
better acquisition and retention efforts.
Global Tourism and COVID-19
Authors: Harchandani Priya , Shome Samik
Published: June 2021

The world is facing an unprecedented situation with COVID-19. The normal functioning of economies has been completely interrupted
with the lockdowns in place. The consequences of pandemic
have been deeply felt across the entire global tourism ecosystem. Travel
restrictions that were put in place to reduce the outbreak of coronavirus,
affected various sectors of every economy.
Since recovery of tourism is crucial for the turnaround
of any economy, this study aims to provide an overview of the impact of
COVID-19 on global tourism and highlighted the ways that can lead the path of
revival of the sector. To make this assessment, the paper studied three associated
industries of tourism viz. airlines; hospitality with special focus on the
hotel segment; and the MSMEs involved directly in tourism related business.
Region-wise analysis reveals that the Asia-Pacific zone has been the worst
affected followed by the Middle East. As countries are opening up their borders
and encouraging tourism, the sector is facing the challenge of rebuilding the
consumer confidence in order to promote future tourism. Hence, the paper also provides
an overview of policy decisions taken worldwide which will be crucial for
sustenance of the global tourism sector.
Новий підхід до побудови узагальнених класичних поліномів
Authors: Makarov V. L.
Published: June 2021

УДК 517.587
Роботу присвячено розробці нового методу побудови узагальнених класичних поліномів, насамперед поліномів Ерміта, у сенсі A. Krall, J. Koekoek, R. Koekoek, H. Bavinck, L. Littlejohn та ін. Побудовано диференціальний оператор нескінченного порядку, власними функціями якого є такі поліноми. Досліджено ряд властивостей узагальнених поліномів Ерміта, що притаманні класичним ортогональним поліномам (ортогональність, узагальнену формулу Родріга, тричленне рекурентне співвідношення, твірну функцію). Продемонстровано універсальність нового методу для побудови узагальнених поліномів Лежандра та Чебишова першого роду.
Mistakes in Mathematics Problems Solving Based on Newman's Error Analysis on Set Materials
Authors: Noutsara Sutidte , Neunjhem Tumkom , Chemrutsame Watchaeeya
Published: June 2021

The purpose of this research is to illustrate students' errors using Newman's methods for working on problems in mathematical set materials as a basis for description. For the purpose of gathering data, researchers make observations both before the start of a study and throughout the course of the study, that is, when students are working on the exams that are provided. Unstructured observation is the kind of observation that will be utilized by researchers in their investigations. The exam is also used to evaluate students' errors in completing math narrative problems using provided material, which is based on Newman's Error Analysis. During the interviews, students are interviewed one at a time in order to make it simpler for researchers to explain the errors they made while attempting to solve the provided issue. The result of the study shows that High Ability Category experience reading and comprehension errors. They also experience a transformation error in the problem-solving stage of the problem. The problem of process skill is to determine the slice of the set. The answer obtained is not correct and does not match the answer on the question, so the subject makes a mistake at the skill stage of the process
The main directions of customer orientation studying: antecedents, levels and effectiveness
Authors: Gulakova Olga
Published: June 2021

Customer orientation as one of the mainstream concepts of contemporary marketing has been actively developed since 1990s. The purpose of the article is to develop a conceptual model of customer orientation relationships in a company based on a systematic analysis of existing studies and their adaptation to practical use. As a result of the analysis, the approaches to determining customer orientation are systematized on the basis of two determinants: the level of customer orientation (personal, organizational) and the approach of customer orientation interpretation (value, process). To determine customer orientation, the author uses an integrated approach, which includes value and process characteristics of customer orientation, as it gives companies a more comprehensive understanding for the development of a customer-oriented approach. Within this approach, customer orientation is defined as activities of a company to collect information on existing and potential customers, disseminating this information in the company and developing actions to meet current and future customer needs by creating the highest value. The developed model reflects the relationship between customer orientation and various aspects of company's business and the prerequisites for its development. The data obtained show that customer orientation affects not only performance, but also employees, competitive advantage, customers and the choice of management strategies. The conceptual model allows to take an overall look at customer orientation in the company and devise a plan for its development.
Impact of land cover change on land surface temperature over Greater Beirut Area – Lebanon
Authors: Khyami Ali
Published: June 2021

Remote sensing (RS) technology has been used together with geographic information systems (GIS) to determine the LC types, retrieve LST, and analyze their relationships. The term Greater Beirut Area (GBA) is used to refer to the city of Beirut and its suburbs which witnessed rapid urban growth, after the end of the civil war, in the last decade of the twentieth century, due to the increase in the number of its inhabitants, and the prosperity and development of sectors such as; industrial, trade, tourism, and construction. These factors led to a wide change in the land cover (LC) types and increased land surface temperature LST. The results showed an increase in built-up areas by 29.1%, and agricultural lands by 6%, while bare land, forests, and seawater decreased by 28.5%, 4.9%, and 1.9%, respectively. These changes caused large differences in the LST between built-up areas and other LC types. The highest LST recorded was in built-up areas (33.03°C in 1985, and 34.01°C in 2020), followed by bare lands (32.61 °C in 1985 and 33.49°C in 2020), cropland (31.23°C in 1985 and 32.17°C in 2020), forest (30.08°C in 1985 and 30.47°C in 2020), and water (24.97°C in 1985 and 28.15°C in 2020). Consequently, converting different LC types into built-up areas led to increases in LST and changed microclimate.
Az emberölés kriminálpszichológiai megközelítése
Authors: Boda Zoltán
Published: June 2021

As a result of the scandalous child homicide in Győr (year 2019), which case got a high publicity in the media, we decided to deal with the following question: what reasons could lie behind such homicides. We studied the criminal psychology of homicide and also tried to observe the connecting psychology-related questions. As a result of our study, we identified that the common specialty of criminal personality disorder and criminal endangerment is the general immaturity of personality (as a result of obstruction in personality development and harm of personality) and the high intensity of aggressive behaviour whose deduction is rejected by the society. On the top of the foregoing comes the moral defect of the perpetrator, which means the lack or severe distortion of moral rules governing his or her behaviour.
A sorozat-bűncselekmények nyomozásának metodikája
Authors: Nyitrai Endre
Published: June 2021

Detecting and proving of serial crimes became even more difficult in our current digital society. Crimes can be committed in many areas of the country, and nowadays, borders are no barriers at all. Crimes, committed in the digital world, can be committed in any part of the world. Detecting the sequences can provide the understanding of the relevant past events and the interruption of the crime series. The aim of the study was to define and investigate the execution of the tasks necessary for the detection of serial crimes, including the profile analysis, the basics of the e-investigation and the justification of the investigation team.
Amikor a kíváncsiság elfogulttá tesz
Authors: Fogarasi Mihály , Máthé Izabella
Published: June 2021

The intensive curiosity not accompanied by physiological reaction has been found to be a causal factor for the “curse of knowledge”, according to our empirical research with crime investigators. This kind of bias of investigative information processing can disfigure the evaluation of forensic information.
A „másképp lesz holnap” ígérete
Authors: Lippai Zsolt , Kaczvinszki Blanka
Published: June 2021

The COVID-19 pandemic has fundamentally changed the way we think about everyday safety. All the negative effects of the virus on internal and foreign policy, the world economy, and people’s mental health are not even predictable yet. In our study, we examine the effects of the virus from a statistical, religious, scientific, and everyday perspective, with the promise that it will be different tomorrow.
Pápai követek helye és szerepe az egyház békemissziójában az új típusú biztonsági kihívások fényében
Authors: Ujházi Lóránd
Published: June 2021

The Catholic Church has exclusive opportunities in international crisis management and peacekeeping. The Catholic Church is – beside being a religious congregation – an international legal entity of the Apostolic See. The present pope tries to position the whole dicastery system as a peacemaker. Due to the nature of the situation papal nuncios and diplomatic missions of the Apostolic See play outstanding roles in these missions. The diplomats in conflict areas and in international organisations play especially important roles. The Church Law Code presents only briefly and first of all from legal point of view the place of nuncios in the Canon. In addition to that CIC follows the classical distribution system: it writes about tasks of nuncios in connection with partial churches and countries. But a peace mission interlaces the whole mission of a nuncio, it is much more complicated than a simple legal approach and simultaneously an exciting and versatile activity. This diversity is presented in this paper.
Recenzió Mátyás Szabolcs „A kábítószer-bűnözés elleni küzdelem, mint stratégiai kihívás a magyar bűnüldözésben” című munkájához
Authors: Sivadó Máté
Published: June 2021

I was interested in the work of Szabolcs Mátyás entitled “Fighting Drug Crime as a Strategic Challenge in Hungarian Law Enforcement.” Dr. Szabolcs Mátyás police major, Associate Professor of the Department of Investigative Theory at the Faculty of Law Enforcement of the University of Public Administration. The author had not too many works on drugs. Warrants of high quality were his prior researches and their results, his publications, which were mainly written in the topics of forensics, criminal geography and tourism security.
The Study of Dust Formation of Four Type Ibn Supernovae
Authors: Gan Wen-Pei , Wang Shan-Qin , Liang En-Wei
Published: June 2021

In this paper, we investigate the early-time optical–near-infrared (NIR) spectral energy distributions (SEDs) of four Type Ibn supernovae (SNe). We find that the SEDs of SN 2010al, LSQ13ddu, and SN 2015G can be well explained by the single-component blackbody model, while the SEDs of OGLE-2012-SN-006 cannot. We invoke the double-component model assuming that the SEDs were produced by the SN photosphere and the heated dust to fit the optical−NIR SEDs of the four SNe Ibn, finding that the derived temperatures of the dust associated with OGLE-2012-SN-006 favor the scenario that the dust consists of the graphite grains, and the mass and temperature of dust are ∼0.5–2.0 × 10−3
M
⊙ and ∼1200–1300 K, respectively. Moreover, our fits for SN 2010al, LSQ13ddu, and SN 2015G show that the upper limits of the masses of the dust associated with the three SNe Ibn are respectively 1.45 × 10−5
M
⊙, 5.9 × 10−7
M
⊙, and 2.4 × 10−7
M
⊙. A further analysis demonstrates that the inferred radius of the dust shell surrounding OGLE-2012-SN-006 is significantly larger than that of the SN ejecta at early epochs, indicating that the NIR excesses of the SEDs of OGLE-2012-SN-006 were produced by a preexisting dust shell. Our study for the early-time SEDs of four SNe Ibn, together with the previous studies and the fact that some SNe showed evidence of dust formation at the late-time SEDs, indicates that at least ∼1/3 of SNe Ibn show evidence for dust formation.
X-Ray Emission from Isolated Neutron Stars Revisited: 3D Magnetothermal Simulations
Authors: De Grandis Davide , Taverna Roberto , Turolla Roberto , Gnarini Andrea , Popov Sergei B. , Zane Silvia , Wood Toby S.
Published: June 2021

X-ray emission from the surface of isolated neutron stars (NSs) has been now observed in a variety of sources. The ubiquitous presence of pulsations clearly indicates that thermal photons either come from a limited area, possibly heated by some external mechanism, or from the entire (cooling) surface but with an inhomogeneous temperature distribution. In an NS the thermal map is shaped by the magnetic field topology since heat flows in the crust mostly along the magnetic field lines. Self-consistent surface thermal maps can hence be produced by simulating the coupled magnetic and thermal evolution of the star. We compute the evolution of the NS crust in three dimensions for different initial configurations of the magnetic field and use the ensuing thermal surface maps to derive the spectrum and the pulse profile as seen by an observer at infinity, accounting for general-relativistic effects. In particular, we compare cases with a high degree of symmetry with inherently 3D ones, obtained by adding a quadrupole to the initial dipolar field. Axially symmetric fields result in rather small pulsed fractions (≲5%), while more complex configurations produce higher pulsed fractions, up to ∼25%. We find that the spectral properties of our axisymmetric model are close to those of the bright isolated NS RX J1856.5-3754 at an evolutionary time comparable with the inferred dynamical age of the source.
Influence of operating time on the corrosion in single-phase and two-phase media
Authors: Baranenko Valery I. , Gulina Olga M. , Salnikov Nikolay L.
Published: June 2021

Modern foreign computer codes predict a linear growth in the pipeline wall thinning with time due to the process of flow-accelerated corrosion (FAC), i.e. erosion-corrosion wear (ECW). Linear time-thinning dependence and corrosion rate constancy are not however typical of the NPP piping operating conditions. And the associated excessive conservatism of the residual life estimates leads to increased economic costs of repeated inspections. In domestic software tools, EKI-02 and EKI-03, the influence of operating time are taken into account by introducing the respective coefficient into the Chexal-Horowitz model based on the yield of corrosion products into the coolant. The ECW intensity can be however reduced through improvements in operating conditions, preventive measures, improvements in water chemistry, etc., and the use of the dependences once obtained may turn out to be too conservative. Based on a large number of repeated measurements as well as on data from corrosion testers, it has been shown that the influence of time can be described by the function of a particular form, the coefficients of which differ for different units and component and subsystem types. This makes it possible to determine the ‘aging function’ based on inspection data, and then use it in a targeted way for particular components. It has been shown that such estimates are much less conservative.
Le Parlement européen et la politique de la mémoire : explorer la constellation des acteurs
Authors: Milošević Ana , Perchoc Philippe
Published: June 2021

Au cours des dernières décennies, le Parlement européen s’est peu à peu saisi d’un nouveau rôle, celui d’une chambre de débats et de résolutions relatifs à l’interprétation de l’histoire du continent. Pour comprendre les résultats, parfois controversés de ces résolutions, il convient de s’intéresser aux règles, aux processus et aux dynamiques politiques qui ont dominé ces débats au cours du temps. L’observation de ces tensions et processus permet de montrer les logiques de construction de ce cadre mémoriel européen proposé par le Parlement et qui a des implications en termes politiques mais aussi de politiques publiques européennes.
Réflexions d’un pianiste confiné
Authors: Réach Pierre
Published: June 2021

Un confinement est une redoutable épreuve pour un musicien : il impose repli, solitude, impossibilité de transmettre, et annulation ou report de toute apparition publique. Ce sont cette résilience, ces souffrances mais aussi cette persévérance dans mon travail personnel, notamment des sonates de Beethoven ainsi que ces espérances vécues ces derniers mois que j’ai souhaité reproduire dans mes « Réflexions d’un pianiste confiné ».
Le saut mystérieux du neural au mental
Authors: Smadja Claude
Published: June 2021

Le saut mystérieux du neural au mental a fait l’objet de nombreux travaux scientifiques, tant du côté de la biologie que du côté de la psychanalyse. L’hypothèse d’un processus d’auto-organisation à partir des systèmes neuronaux et ses effets d’émergence avec l’apparition du psychique semble la plus heuristique pour rendre compte du passage du neural au mental. Quelques concepts opérateurs permettent de comprendre ce passage, tels ceux des plasticités cérébrales et de réentrée du côté de la biologie et ceux de pulsion et de surmoi du côté de la psychanalyse.
Le schizophrène en mal d’objet, de Vassilis Kapsambelis
Authors: Chambrier-Slama Josiane
Published: June 2021

Dans son livre, V. Kapsambelis, découpe de manière originale le champ clinico-théorique de la schizophrénie et propose une étude du fonctionnement du couple moi-objet qui enrichit toute la psychopathologie.
Spatiotemporal dynamics for a diffusive HIV-1 infection model with distributed delays and CTL immune response
Authors: Liu Zhijun , Wang Lianwen , Tan Ronghua
Published: June 2021

In this study, we develop a diffusive HIV-1 infection model with intracellular invasion, production and latent infection distributed delays, nonlinear incidence rate and nonlinear CTL immune response. The well-posedness, local and global stability for the model proposed are carefully investigated in spite of its strong nonlinearity and high dimension. It is revealed that its threshold dynamics are fully determined by the viral infection reproduction number \begin{document}$ \mathfrak{R}_0 $\end{document} and the reproduction number of CTL immune response \begin{document}$ \mathfrak{R}_1 $\end{document}. We also observe that the viral load at steady state (SS) fails to decrease even if \begin{document}$ \mathfrak{R}_1 $\end{document} increases through unit to lead to a stability switch from immune-inactivated infected SS to immune-activated infected SS. Finally, some simulations are performed to verify the analytical conclusions and we explore the significant impact of delays and CTL immune response on the spatiotemporal dynamics of HIV-1 infection.
The qualitative behavior of a plankton-fish interaction model with food limited growth rate and non-constant fish harvesting
Authors: Gupta R. P. , Tiwari Shristi , Saxena Shivam
Published: June 2021

The manuscript aims to investigate the qualitative analysis of a plankton-fish interaction with food limited growth rate of plankton population and non-constant harvesting of fish population. The ecological feasibility of population densities of both plankton and fish in terms of positivity and boundedness of solutions is shown. The conditions for the existence of various equilibrium points and their stability are derived thoroughly. This study mainly focuses on how the harvesting affects equilibrium points, their stability, periodic solutions and bifurcations in the proposed system. It is shown that the system exhibits saddle-node bifurcation in the form of a collision of two interior equilibrium points. Existence conditions for the occurrence of Hopf-bifurcation around interior equilibrium points are discussed. Lyapunov coefficients are examined to check the stability properties of these periodic solutions. We have also plotted the bifurcation diagrams for saddle-node, transcritical and Hopf bifurcations. A detailed algorithm for the occurrence of Bogdanov-Takens bifurcation is derived and finally some numerical simulations are also carried out to validate the theoretical results. This work suggests that the harvesting of fish population can change the dynamics of the system, which may be useful for the ecological management.
SVD-Krylov based techniques for structure-preserving reduced order modelling of second-order systems
Authors: Motlubar Rahman Md. ,   Department of Mathematics, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh, Uddin Mahtab , Monir Uddin M. , Andallah L. S. ,   Institute of Natural Sciences, United International University, Dhaka-1212, Bangladesh,   Department of Mathematics and Physics, North South University, Dhaka-1229, Bangladesh
Published: June 2021

We introduce an efficient structure-preserving model-order reduction technique for the large-scale second-order linear dynamical systems by imposing two-sided projection matrices. The projectors are formed based on the features of the singular value decomposition (SVD) and Krylov-based model-order reduction methods. The left projector is constructed by utilizing the concept of the observability Gramian of the systems and the right one is made by following the notion of the interpolation-based technique iterative rational Krylov algorithm (IRKA). It is well-known that the proficient model-order reduction technique IRKA cannot ensure system stability, and the Gramian based methods are computationally expensive. Another issue is preserving the second-order structure in the reduced-order model. The structure-preserving model-order reduction provides a more exact approximation to the original model with maintaining some significant physical properties. In terms of these perspectives, the proposed method can perform better by preserving the second-order structure and stability of the system with minimized $ \mathcal{H}_2 $-norm. Several model examples are presented that illustrated the capability and accuracy of the introducing technique.
D’une auto-prescription à une mise en œuvre d’investigation. Étude de cas en SVT au collège
Authors: Coquidé Maryline , Flatter Estelle
Published: June 2021

Pour contribuer à mieux connaitre les facteurs pouvant influencer les élaborations et les mises en œuvre d’investigation, nous proposons l’étude de cas de quatre enseignants de SVT en collège dans l’Académie de Strasbourg. Des entretiens préliminaires ont été réalisés, les séances de classe ont été enregistrées et des entretiens d’auto-confrontation ont été effectués. Les analyses du corpus mettent en évidence des représentations sur les investigations, sur le rôle de l’enseignant et sur la place des élèves. Les entretiens témoignent de l’importance d’aspect curriculaire, concernant les contenus et les ressources disponibles, les moyens matériels, des contraintes temporelles et des aspects pédagogiques. Deux analyses particulières, relatives à l’équilibre entre guidage par l’enseignant et autonomie des élèves d’une part, au lien que les enseignants établissent entre démarches d’investigation et tâches complexes d’autre part, permettent d’étudier une influence des curricula nationaux et académiques.
L’enseignement du fait religieux : une enquête dans trois collèges
Authors: Urbanski Sébastien
Published: June 2021

L’article présente les résultats d’une enquête destinée à mieux connaître l’opinion des enseignants à l’égard du projet ministériel d’enseignement du (des) fait(s) religieux. Une courte partie quantitative permet d’émettre des hypothèses concernant une influence possible de la croyance religieuse et de l’ancienneté sur les avis exprimés. Une partie qualitative permet d’identifier des thèmes controversés, par exemple : quelle est la part du culturel et du collectif dans le fait religieux ? L’enseignement du (des) fait(s) religieux permet-il en tant que tel d’éduquer à la tolérance ? Plus généralement, l’article montre que certaines oppositions subsistent à l’égard du projet ministériel, ce qui pose la question de la mise en œuvre effective du curriculum.
Apprendre par corps l’empathie à l’école : tout un programme ?
Authors: Zanna Omar
Published: June 2021

Ces dix dernières années, un réel regain d’intérêt pour le concept d’empathie voit le jour ; il cherche à renouveler l’interprétation des logiques de compréhension et d’action dans les relations sociales. Ce chantier théorique en construction commence déjà à produire des effets dans les recherches en sociologie, en psychologie des apprentissages et en sciences de l’éducation. La recherche-action-intervention titrée « De l’empathie pour lutter contre le harcèlement à l’école », menée avec des classes de CM1-CM2 (élèves âgés entre neuf et onze ans) au cours des années 2012-2014, en est une illustration. Ce programme d’éducation à l’empathie propose aux élèves de vivre des situations, permettant d’accéder à la reconnaissance de l’Autre, à partir d’une médiation des émotions générées par la mise en scène des corps. Les lignes qui suivent proposent de restituer la procédure et quelques résultats de ce travail, non sans en avoir au préalable précisé la genèse.
Developing a Model to Highlight the Relation of Digital Trust With Privacy and Security for the Blockchain Technology
Authors: Mukherjee Subhodeep , Chittipaka Venkataiah , Baral Manish Mohan
Published: June 2021

Digitalization uses digital technology to change a business model and provide new revenue models and value-producing opportunities. Blockchain is a type of database that stores various kinds of information in blocks that form a chain of information. It is one of the secured ways of transferring and storage of data. Blockchain is helping in creating trust for digitalization among its users. This research aims to study the impact of trust in blockchain by analyzing the privacy and security concerns that can impact the user attitude and its intention to the adoption process. For this structure, literature review is performed. Five variables are used, and they are attitude, privacy, trust, security, and intention. A questionnaire is developed for survey-based research in the software firms, banking sector, and digital marketing companies. For analysis, exploratory factor analysis and structural equation modeling are used. A model is developed that shows a good fit, and the parameters are satisfied.
Investigation on Industry Applications of Blockchain Technology
Authors: R. Dhaya , R. Kanthavel
Published: June 2021

Blockchain (BC) is a collective, indisputable ledger that makes easy the course of action of recording dealings and footpath possessions in an industry system. On the other hand, BC is significant in business that sprints on information. A BC network can follow instructions, expenditure, financial records, manufacture, and many more. Yet, the difficulties of BC in industry like mindfulness and getting, association, culture, cost and proficiency, regulation and administration, and security and protection must be properly dealt with to gain the advantages fully. Hence, the objectives of this chapter are to investigate various applications of industries that involve BC technology, the challenges, evolution of BC in industry applications, and its need, types of BC, and networks for industries and comparison. Further, the chapter discusses how to manage the hyperconnected supply chain in terms of industrial applications in terms of scalability, integrity, and legacy.
The Integration of the Blockchain Technology Into Wine Tourism
Authors: Unurlu Çiğdem
Published: June 2021

The aim of this study is to offer some suggestions to both the tourism industry and the practitioners in terms of making wine tourism and wine supply chain more transparent and traceable. From this point of view, in the current study, in which the blockchain technology in wine supply chain is examined, first the technology of block chain has comprehensively been assessed, and later the operational principles of blockchain technology are discussed. Afterwards, the blockchain technology was attempted to be integrated into wine tourism and wine supply chain. Hence, a new model was proposed. In this respect, the outputs that can be obtained via the use of blockchain technology in wine tourism and wine supply chain are revealed in this study.
On Improving Model Checking of Time Petri Nets and Its Application to the Formal Verification
Authors: Jbeli Naima , Sbai Zohra
Published: June 2021

Time Petri nets (TPN) are successfully used in the specification and analysis of distributed systems that involve explicit timing constraints. Especially, model checking TPN is a hopeful method for the formal verification of such complex systems. For this, it is promising to lean to the construction of an optimized version of the state space. The well-known methods of state space abstraction are SCG (state class graph) and ZBG (graph based on zones). For ZBG, a symbolic state represents the real evaluations of the clocks of the TPN; it is thus possible to directly check quantitative time properties. However, this method suffers from the state space explosion. To attenuate this problem, the authors propose in this paper to combine the ZBG approach with the partial order reduction technique based on stubborn set, leading thus to the proposal of a new state space abstraction called reduced zone-based graph (RZBG). The authors show via case studies the efficiency of the RZBG which is implemented and integrated within the 〖TPN-TCTL〗_h^∆ model checking in the model checker Romeo.
Computer Aided Design of Ultrasonic Test by Numerical Simulation
Authors: Erdei Réka , Bézi Zoltán , Takács Csaba
Published: June 2021

Ultrasonic tests of dissimilar metal welds require extremely sophisticated technology. The complexity of the test is caused by the grain orientation and difficult accessibility of the weld and it is therefore necessary to redound the examinations by simulation. This study details some application possibilities of CIVA software and presents an example of the evaluation of the procedure used for the given test method with probability of detection curves.
Friction Stir Welding of Steel Structures - A Brief Review
Authors: Crăcănel Mihai Octavian , Nitu Eduard Laurentiu , Iordache Daniela Monica
Published: June 2021

Friction stir welding is a relatively new technique, developed in 1991, which, due to its advantages, has been continuously developed and applied to industrial applications. This process of joining materials in solid state is an extremely complex one because of the physical phenomena that occur during the process, which makes the research still in full development. The paper presents an analysis of recent scientific work on the use of the FSW process for the joining of steel structures. Thus, the types of steels and merged structures, the processes used and the technological parameters used are analyzed. On the basis of this analysis, the main conclusions of the studied works are summarized and the main development directions for research on the FSW process of steel structures are identified.
ISIM Own Contributions on Non-Conventional Abrasive Waterjet Cutting Technologies
Authors: Perianu Ion Aurel , Mnerie Gabriela-Victoria , Cojocaru Radu , Binchiciu Emilia-Florina
Published: June 2021

Modern materials cutting operations are traditionally part of the research priorities and also in the production activities of ISIM Timișoara. In the last decade, within the institute, a special emphasis was placed on the development of the abrasive water jet cutting process as well as on implementing the research results obtained into industrial activities. The paper presents own achievements and contributions of ISIM to the development of the abrasive water jet cutting process in the following directions: cutting technologies for materials with different characteristics, innovative new patentable solutions regarding the cutting process respectively important modules in the composition of the water jet cutting equipment, ways to recycle used abrasive waste, solutions to streamline the process. The proposed solutions have been verified with good results in industrial applications, or have been proposed for analysis and development together with specialists in the field from important research units.
Comparison between Modelled Influence of GMAW Parameters and Corresponding Mechanical Properties of Group 1 and 2 According to ISO/TR 15608 Steel T Joints
Authors: Bîrdeanu Aurel Valentin , Murariu Alin Constantin , Daşcău Horia Florin , Duma Iuliana
Published: June 2021

Reproducibility in respect to welded structures realization is one of the main requirements for a wide variety of industrial applications. One of the international tendencies regarding the use of the steel is the replacing, in critical areas, of structural steels with high performance steel, e.g. with HSLA steels. The paper presents the results of a factorial designed experimental program focused on determining mathematical correlations between the GMAW process parameters for T joints of 4mm thick steel plates of structural (S235JR+AR according to SR EN 10025-2) and hot-rolled, high-strength low-alloy (HSLA) steel plates (S420MC according to EN 10025-4), respectively. A comparison between the obtained mathematical correlations that connect the welding parameters and the main mechanical characteristics is presented. The correlations can be used for applying the optimal combination of welding process parameters for realizing the T-joints of welded products.
Numerical Modeling for the Submerging Arc Welding of S700MC Steel
Authors: Mileva Stiliyana , Ferdinandov Nikolay , Gospodinov Danail , Radev Rossen , Angelov Yulian , Draganov Ivo
Published: June 2021

This paper presents a finite element model of submerged arc welding. The modeling of the filler material has been performed by applying the technique for deactivation and subsequent activation of the finite elements involved in the welding seams. The nonlinear material properties are taken into account. The description of the peaks in the specific heat capacity in the phase changes has been done by introducing latent heat. The welding arc is modeled as a heat source with a constant heat flux density. Experiments have been conducted to validate and verify the numerical model. The influence of the ratio between surface and volume of the set heat sources has been studied. Tack welds have been taken into account. Data on the relationship between the accuracy of the obtained results and the number of passages has been presented.
Reintroduction in the Process of Operation of Worn Metal Assemblies, from the Composition of Public Transport Vehicles, Using Mechanized MIG/MAG (GMA) Welding Reconditioning, in Conditions of Guaranteeing Traffic Safety
Authors: Perianu Ion Aurel , Botila Lia-Nicoleta , Cojocaru Radu , Binchiciu Emilia-Florina
Published: June 2021

Replacing worn or damaged parts implies high material costs and financial expense for public tram transportation services, especially for the imported units and that is why it is preferable to recondition them, taking into consideration the safety requirements. In this paper, ISIM initiatives and achievements are presented in the field of cost reduction and maintenance during operation of trams, by introduction in the operation process of worn parts, within the safety limits. Aspects are presented regarding the possibilities for reconditioning and repair of parts with a circular geometry (e.g. wheel bands, axles, drum brakes). Some of these are being applied and implemented. Also, innovative ideas are presented for increasing the performance of equipment used for reconditioning.
Divergence of plastid 2-oxoglutarate “only” transporters away from general transporters by using a cysteine-rich architecture
Authors: Gunawardana D.
Published: June 2021

The common carbon and nitrogen currency, 2-oxoglutarate, could become a valuable resource for nitrogen assimilation and carbon centered biochemical fates. Here in this in silico study, a myriad of factors was used, namely phylogeny, sequence comparisons, and presence and location of clustered cysteines in specific plastid transporters of 2-oxoglutarate, to examine their evolution away from more generalized transporters. This transition would be to adopt the capability of internalizing 2-oxoglutarate alone or with superior specificities at the expense of malate. In phylogeny, the specific 2-oxoglutarate transporters (Cluster 1) are clustered in a separate clade away from 2 clades of general transporters (Cluster 2 and 3). The exclusivity (Cluster 1) and promiscuity of transporters (Cluster 2 and 3) compared to Arabidopsis counterparts characterized prior to this study, were used as a benchmark for my study. Within this mother clade of exclusive transporters, C4 and C3 2-oxoglutarate transporters once again form separate clusters of monophyly.  Furthermore, a pattern of Cys –X-X-Cys-X(19)-Cys is conserved within the 2-oxo-glutarate only transporters that is missing in general transporters. Cysteines which are functionally key residues are inferred to be mediating intra- or inter-reactive disulfide bond formation or using a thiol (sulfhydryl) group for transport or to be forming a metal binding site. When a disulfide bond prediction tool was employed, it showed with negligible doubt that the Cys-X-X Cys-X(19) -Cys region was a strong contender for 2 separate disulfide bonds, although the middle cysteine was predicted to be involved in both.  In addition, Cluster 2 general Zea mays C4 transporters are shown to be more recalcitrant to mutations of cysteines, compared to Panicum and Oryza counterparts.  The study of 2-oxoglutarate and its availability in the chloroplast could play a two-prong role in C4 plants: to be a candidate for synthesis of bundle sheath cell Rubisco enzyme, which makes up ~50% of plant proteins, via ammonia assimilation, and even playing a role in carbon-centered biochemical pathways. This study could greatly facilitate choices in the tinkering of the right transporters for a future C4 rice in a climate change impacted world.
Proinflammatory Features of Stem Cell–like Memory T Cells from Human Patients with Rheumatoid Arthritis
Authors: Lee Ye Ji , Park Eun Hye , Park Jun Won , Jung Kyeong Cheon , Lee Eun Bong
Published: June 2021

Stem cell–like memory T (Tscm) cells are a subset of memory T cells that have characteristics of stem cells. The characteristics of Tscm cells in patients with rheumatoid arthritis (RA) are not well known. The percentage of CD4+ and CD8+ Tscm cells in PBMCs and synovial fluid mononuclear cells was measured. After confirming the stem cell nature of Tscm cells, we examined their pathogenicity in RA patients and healthy controls (HCs) by assessing T cell activation markers and cytokine secretion after stimulation with anti-CD3/CD28 beads and/or IL-6. Finally, RNA transcriptome patterns in Tscm cells from RA patients were compared with those in HCs. In this study, the percentage of CD4+ and CD8+ Tscm cells in total T cells was significantly higher in RA patients than in HCs. Tscm cells self-proliferated and differentiated into memory and effector T cell subsets when stimulated. Compared with Tscm cells from HCs, Tscm cells from RA patients were more easily activated by anti-CD3/CD28 beads augmented by IL-6. Transcriptome analyses revealed that Tscm cells from RA patients showed a pattern distinct from those in HCs; RA-specific transcriptome patterns were not completely resolved in RA patients in complete clinical remission. In conclusion, Tscm cells from RA patients show a transcriptionally distinct pattern and are easily activated to produce inflammatory cytokines when stimulated by TCRs in the presence of IL-6. Tscm cells can be a continuous source of pathogenicity in RA.