bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH PEMBELAJARAN KOOPERATIF TIPE SCRAMBLE TERHADAP HASIL BELAJAR IPS SISWA SD INPRES BORONG JAMBU II
Authors: Fatimah Waddi , Alam Syamsul , Mandak Siska
Published: June 2021

Penelitian ini bertujuan untuk mengetahui Pengaruh Model Pembelajaran Kooperatif Tipe SCRAMBLE  Terhadap Hasil Belajar IPS Siswa Kelas V SD Inpres Borong Jambu II Kecamatan Manggala Kota Makassar. Jenis Penelitian eksperimen yang digunakan adalah pre experimental design dengan desain One Group PreTest-PosTest. Populasi adalah Siswa Kelas V SD Inpres Borong Jambu II Kecamatan Manggala Kota Makassar sebanyak 57 siswa dan sampel Kelas Vb sebanyak 29 siswa. Teknik penentuan sampel dilakukan teknik sampling jenuh. Teknik analisis data yang digunakan adalah analisis deskriptif dan inferensial. Hasil Penelitian menunjukkan bahwa kemampuan guru dalam mengelolah pembelajaran diperoleh rata-rata sebesar 4,15 yang berarti tingkat keterlaksanaan model pembelajaran terlaksana dengan baik sedangkan hasil belajar IPS siswa kelas Vb dapat digambarkan pada hasil belajar pretest dan postest sebesar 78,71% yang berarti tingkat keberhasilan siswa dinyatakan baik sehingga penerapan model pembelajaran kooperatif tipe SCRAMBLE  berpengaruh secara signifikan terhadap hasil belajar IPS  kelas Vb khususnya di SD Inpres Borong Jambu II Kecamatan Manggala Kota Makassar
UPAYA PENINGKATAN KOMPETENSI GURU DALAM MENYUSUN SILABUS DAN RPP MELALUI SUPERVISI AKADEMIK YANG BERKELANJUTAN DI SMAN 1 SIMBORO KABUPATEN MAMUJU
Authors: Sudirman Sudirman
Published: June 2021

Setiap proses pasti selalu meliputi tiga kegiatan utama yakni perencanaan, pelaksanaan dan evaluasi. Demikian pula yang terjadi dengan proses belajar mengajar di sekolah. Seorang guru diharuskan melakukan perencanaan, pelaksanaan dan evaluasi pembelajaran. Proses perencanaan pembelajaran yang harus dilakukan oleh seorang guru meliputi kegiatan utama sebagai berikut:(1) membuat program tahunan; (2) membuat program semester; (3) membuat silabus; (4) membuat rencana pelaksanaan pembelajaran; dan (5) membuat program ulangan/evaluasi. Dari kelima unsur tersebut di atas, silabus dan RPP merupakan persiapan paling minimal seorang guru ketika hendak mengajar. Berdasar kepada hasil analisa pada tahun pelajaran 2019/2020 di SMA Negeri 1 Simboro Kabupaten Mamuju, muncul permasalahan rendahnya guru yang membuat perencanaan pembelajaran khususnya penyusunan silabus dan RPP. Untuk meneliti lemahnya kinerja guru dalam hal tersebut, dilakukanlah penelitian untuk melihat sejauhmana langkah supervisi akademik kepala sekolah dapat meningkatkan kompetensi guru dalam penyusunan silabus dan Rencana Pelaksanaan Pembelajaran. Berdasarkan hasil penelitian yang diuraikan pada bab IV, disimpulkan bahwa:(1) melalui supervisi akademik berkelanjutan dapat meningkatkan kompetensi guru dalam menyusun silabus dan RPP di SMA Negeri 1 Simboro Kabupaten Mamuju. Ini terbukti dengan meningkatnya jumlah silabus guru yang baik dari 25% menjadi 75% setelah supervisi akademik dan jumlah RPP yang berkualitas baik juga meningkat dari 31% menjadi 87%; (2) langkah-langkah yang mengakibatkan terjadinya peningkatan kompetensi guru dalam menyusun silabus dan RPP adalah sebagai berikut: (1) pengumuman rencana supervisi terhadap guru; (2) pelaksanaan supervisi individual; (3) pengecekan terhadap keoriginalitas silabus dan RPP yang disusun oleh guru. Untuk kepala sekolah disarankan bahwa pelaksanaan supervisi individual sangat cocok digunakan untuk meningkatkan kompetensi guru dalam menyusun silabus dan RPP yang selama ini masih menjadi administrasi yang masih sulit diminta dari guru-guru dan kepala sekolah dapat memberikan masukan yang lebih jelas, bimbingan  yang berkelanjutan dan terarah dalam pembinaan terhadap administrasi guru
List-method directed forgetting: Do critical findings generalize from short to long retention intervals?
Authors: Abel Magdalena , Kuchler Bettina , Meier Elisabeth , Bäuml Karl-Heinz T.
Published: June 2021

People can purposefully forget information that has become irrelevant, as is demonstrated in list-method directed forgetting (LMDF). In this task, participants are cued to intentionally forget an already studied list (list 1) before encoding a second list (list 2); this induces forgetting of the first-list items. Most research on LMDF has been conducted with short retention intervals, but very recent studies indicate that such directed forgetting can be lasting. We examined in two experiments whether core findings in the LMDF literature generalize from short to long retention intervals. The focus of Experiment 1 was on the previous finding that, with short retention interval, list-2 encoding is necessary for list-1 forgetting to arise. Experiment 1 replicated the finding after a short delay of 3 min between study and test and extended it to a longer delay of 20 min. The focus of Experiment 1 was on the absence of list-1 forgetting in item recognition, previously observed after short retention interval. Experiment 1 replicated the finding after a short delay of 3 min between study and test and extended it to longer delays of 20 min and 24 h. Implications of the results for theoretical explanations of LMDF are discussed.
Suicide Tourism
Authors: Christou Prokopis A.
Published: June 2021

The purpose of this short communication is to
deliver a theoretical perspective of suicide tourism within the context of
Leiper’s tourism system. Based on the theoretical model, it may be argued
whether travel for suicidal purposes meets the requirements to be regarded as a
form of tourism. Despite this, the term is widely used in both academia and in
the media. The author urges the academic community to provide directions to
tourism stakeholders on how to assist those who choose to travel to specific
locations to take their own lives. The exposure of places as “suicidal hot
spots” should be avoided by the media. This may give the impression of a
pseudo-idyllic form of tourism activity with the participant’s own life, while
it involves the risk of triggering people’s inquisitiveness of capturing and
sharing the macabre moment on social media and help visitors act as observers
of the death of others.
Convergence of SP-iteration for generalized nonexpansive mapping in Banach spaces
Authors: Ali J. , Uddin I.
Published: June 2021

UDC 517.9
Phuengrattana and Suantai [J. Comput. and Appl. Math., 235, 3006 – 3014 (2011)] introduced an iteration scheme and they named this iteration as SP-iteration. In this paper, we study the convergence behaviour of SP-iteration scheme for the class of generalized nonexpansive mappings. One weak convergence theorem and two strong convergence theorems in uniformly convex Banach spaces are obtained. We also furnish a numerical example in support of our main result. In process, our results generalize and improve many existing results in the literature.
Integral operators preserving subordination and superordination for multivalent functions
Authors: Aouf M. K. , Bulboacaă T. , Seoudy T.
Published: June 2021

UDC 517.9
We obtain subordination, superordination and sandwich-preserving new theorems for certain integral operators defined on multivalent functions. The sandwich-type theorem for these integral operators is also derived and our results extend some earlier ones. Combining these new theorems with some previous related results, we give interesting subordination and superordination consequences for a wide class of analytic integral operators.
Лема про викидання i майже розщеплюванi послiдовностi
Authors: Drozd Yu. A.
Published: June 2021

УДК 512.55Вивчається поведiнка майже розщеплюваних послiдовностей i сагайдакiв Ауслендера – Райтен порядкiв при викиданнi бiєктивних модулiв згiдно з резульаттами статтi [Ю. А. Дрозд, В. В. Кириченко, О квазибассовых порядках, Изв. АН СССР. Сер. мат., 36, 328 – 370 (1972)]. Зокрема, встановлюються зв’язки стабiльних категорiй i майже розщеплюваних послiдовностей порядку та порядку , одержаного з A таким викиданням. Цi результати уточнено для ґоренштейнових i фробенiусових порядкiв.
Comparison Investigation into Power System Optimization and Constraint-Based Generator Load Scheduling Using Metaheuristic Algorithms
Authors: Rao D. S. Naga Malleswara , Raveendhra Dogga , Kumar Devineni Gireesh , Narukullapati Bharat Kumar , Rao Davu Srinivasa , Palakaluri Srividya Devi
Published: June 2021

In this paper, a novel flower pollination algorithm (FPA) is implemented to solve the problem of combined economic emission dispatch (CEED) in the power system. The FPA is a new metaheuristic optimization technique, which takes a biological approach to flower pollination. The FPA mimics the characteristics of flower pollination according to the survival of the fittest concept. CEED represents a combination of the emission and economic dispatch functions, formulated into a single function using the penalty factor. In this paper, the effect of valve point loading in the power system network is considered to obtain minimum fuel cost, minimum emissions, and optimum power generation. The performance of the proposed algorithm is evaluated using two test systems, namely 10 and 14 generating units by contemplating the valve point loading effect as well as transmission loss. The results of the 10 and 14 system units are compared with a learning-based optimization technique to demonstrate the effectiveness of the FPA. The findings reveal that the proposed FPA gives better performance than other algorithms with minimum fuel cost and emissions.
Advertising in a social network as a signal of quality
Authors: Timerbulatova Kamilla
Published: June 2021

Advertising in a social network has a number of characteristics that distinguish it from other types of advertising, and which may be of key importance in answering the question about its ability to serve as a signal of quality. In the game-theoretic model presented in this paper, the monopolist sends an advertising signal to bloggers who act as “opinion leaders” in the social network. The latter, in turn, make decisions about posting advertising messages on their blogs, taking into account the impact that this action may have on their reputation. The paper investigates the question of when advertising can serve as a reliable signal of quality in a separating equilibrium.
Gender features of digitalization on the Russian labor market
Authors: Ilimbetova Aisuly
Published: June 2021

Digitalization changes the nature of work and the demands for competences of a modern employee, but the speed and volume of digitalization differ by type of economic activity. In the context of existing gender differentiation on the labor market, differences in the degree of digitalization lead to the fact that male and female types of employment change differently. The aim of the article is to determine the degree and features of digitalization of "women's" and "men's" spheres of employment and draw conclusions on the prospective impact of these differences on gender inequality. Data analysis concerning current gender differentiation on the labor market, the scale of occupational digitalization and the use of information technologies for various purposes allows us to conclude that both "male" and "female" professions are highly digitalized, but the nature of the changes is different. Data on the gender distribution in the areas of employment and the degree of digitalization of these areas allow us to distinguish 3 categories of women's participation in digital economy: 1. Household use of digital technologies; 2. Digital technologies use while performing labor functions; 3. Creation of digital technologies and direct participation in digitalization. The areas of women's primary employment (health care, information and communication, finance, education) are currently the leaders in employing digital technologies, so computer technologies penetrate more intensively into the professional activities of women than in "male" professions (for example, construction). However, in software development and digital technology management, women are less represented, acting as users of technologies created mainly by men. Since creation is primary related to usage, digitalization enhances gender inequality determining the innovative role for men and the user role for women, which should be taken into account while implementing policies aimed at overcoming inequality.
LATLAUNCH AIR-LAUNCH SYSTEM FOR LOW-COST LAUNCHING OF SMALL SATELLITES INTO LOW EARTH ORBIT
Authors: Urbahs Aleksandrs , Kravchenko Sergey , Urbaha Margarita , Carjova Kristine , Panova Natalja , Chatys Rafal
Published: June 2021

The paper presents the air-launch system enabling the delivery of small satellites into low Earth orbit. One of the most important advantages of the concept is its cost. Generally, the paper proves that launching a carrier from an aerial platform (a movable launch pad) provides the whole range of competitive advantages. In particular, the total losses during the launch from an aerial platform will reduce by 20–35%, and the characteristic velocity of the maneuver will reduce by 4–7%.
ASSEMBLAGE OF MEMORY: ON THE STRUCTURE, PROCESS AND CREATIVITY IN COLLECTIVE MEMORY
Authors: Niziołek Katarzyna
Published: June 2021

The article is aimed at presenting and discussing the theoretical concept of assemblage of memory inspired by and grounded in the creative work done in connection with social research within the framework of participatory theatre. Based on three projects of this kind that I have collaborated on over the last couple of years, all taking memory as their theme, The Method of National Constellations (2014–2016), Prayer: A Common Theatre (2016–2017), and Bieżenki (2018), the concept draws both on artistic, and sociological thinking. An assemblage of memory could be roughly described as a product of creativity, which is constructed using “found” materials, such as stories, images, emotions, behaviours, objects, people even, to compose a new meaningful entity. This is congruent with what became to be known as the assemblage theory, started by Gilles Deleuze and Félix Guattari, who suggested that social phenomena, such as collective memory, one could add, should be viewed as dynamic and heterogeneous arrangements of a variety of elements, material and immaterial, natural and artificial, human and non-human, that are dependent on the connections between them rather than their intrinsic qualities. Thus, an assemblage of memory cannot be accessed through text-oriented methodologies that still seem to predominate the humanities (with its focus on the witness and testimony), but requires innovative, creative procedures, which, as exemplified by the above mentioned theatrical projects, are capable of revealing its structure and dynamics.
Cosmic Star Formation History Measured at 1.4 GHz
Authors: Matthews A. M. , Condon J. J. , Cotton W. D. , Mauch T.
Published: June 2021

We matched the 1.4 GHz local luminosity functions of star-forming galaxies (SFGs) and active galactic nuclei to the 1.4 GHz differential source counts from 0.25 μJy to 25 Jy using combinations of luminosity and density evolution. We present the most robust and complete local far-infrared (FIR)/radio luminosity correlation to date in a volume-limited sample of ≈4.3 × 103 nearby SFGs, finding that it is very tight but distinctly sublinear:

L

FIR

∝

L

1.4

GHz

0.85

. If the local FIR/radio correlation does not evolve, the evolving 1.4 GHz luminosity function of SFGs yields the evolving star formation rate density (SFRD) ψ(M
⊙ yr−1 Mpc−3) as a function of time since the Big Bang. The SFRD measured at 1.4 GHz grows rapidly at early times, peaks at “cosmic noon” when t ≈ 3 Gyr and z ≈ 2, and subsequently decays with an e-folding timescale τ = 3.2 Gyr. This evolution is similar to, but somewhat stronger than, SFRD evolution estimated from UV and FIR data.
Extreme HBL-like Behavior of Markarian 421 and Its Two-zone Photohadronic Interpretation
Authors: Sahu Sarira , López Fortín Carlos E. , Valadez Polanco Isabel Abigail , Rajpoot Subhash
Published: June 2021

Markarian 421 is the nearest high-energy peaked blazar and is also the first extragalactic source to be detected in multi-TeV γ-rays. It has been observed in multiwavelength for an exceptionally long period of time with dense monitoring and several major outbursts have been detected from this source. In 2010 March, the source was in a high state of activity and was observed in multiwavelength by various telescopes for 13 consecutive days. During this period the position of the synchrotron peak was found to be above 1017 Hz and also the position of the second peak was shifted toward higher energy, a signature of extreme HBL-like behavior. We observed that the standard photohadronic model is inadequate to explain the observed spectra. However, a recently proposed two-zone photohadronic model explains very well the GeV–TeV flaring events observed by both MAGIC and VERITAS telescopes. From the observation of the highest energy γ-ray event on MJD 55266 we also estimated the minimum bulk Lorentz factor.
Le regard de l’historien des épidémies
Authors: Debru Armelle
Published: June 2021

Face aux réactions suscitées par la nouvelle pandémie de Covid 19, l’historien y reconnaît des traits récurrents comme la surprise, le déni, le délai des décisions etc. Malgré le progrès des connaissances nouvelles qui progressent dans les explications, il n’en observe pas moins les mêmes réactions sociales et émotionnelles qui se rejouent comme à chaque fois. Mais cette connaissance du passé ne l’empêche pas d’être lui-même dans le présent hésitant et dépourvu par la masse et la simultanéité des informations, se posant à son tour des questions sur la menace pour l’environnement et le devenir pour l’humanité. L’historien familier des épidémies doit se convertir au futur, cette fois dans l’ignorance.
De la phobie par tant de Covi(d)e. Un point de vue de psychiatre, sans garantie ni assurance
Authors: Hocini Férodja
Published: June 2021

À partir de la clinique des phobies, un point de vue de psychiatre nous conduit à considérer notre rapport à la notion de risques. L’auteure met en lumière notre pathologie collective de la gestion et de l’hypercontrôle. À trop vouloir maîtriser le risque de la vie, on finit par la dévitaliser. Le remède consiste au contraire à accueillir et accompagner la vulnérabilité, dans une navigation à la fois incertaine et confiante. Une riposte poétique au désenchantement de la rationalité calculante.
Acting at the margins – Italian mnemonic activism in the European Parliament
Authors: Sierp Aline , Ortiz Cabrero Lorena
Published: June 2021

Cet article contribue à l’analyse des dynamiques complexes qui animent la construction de politiques mnémoniques au Parlement européen. Pour se faire, cette étude se focalise sur un ensemble d’acteurs qui sont sous-analysés : les députés italiens du Parlement européen. Jusqu’à maintenant, les eurodéputés italiens sont restés à l’écart de la plupart des principales initiatives du Parlement européen sur les politiques de mémoire. La seule exception à la règle a eu lieu pendant les procédures d’accession de la Slovénie et la Croatie. Cet article place dans leur contexte tous les exemples d’activisme mnémonique émanant des eurodéputés italiens dans la période 1999-2019. Cette enquête porte sur les discours spécifiques des acteurs italiens, et sur le lien entre ces discours et le cadre de mémoriel européen. La méthodologie utilisée à cette fin est l’étude des comptes rendus in extenso des débats, propositions de résolution, questions parlementaires et procès-verbaux de groupes de travail au Parlement européen.
(Un)shared memory: European Parliament and EU Remembrance Day for Victims of Terrorism
Authors: Milošević Ana , Truc Gérôme
Published: June 2021

Cet article explore la façon dont le Parlement européen encourage et promeut au sein de l’UE une commémoration transnationale des victimes d'attaques terroristes. Nous revenons sur les origines de la Journée européenne du souvenir des victimes du terrorisme, instituée par le PE le jour même des attentats de Madrid, le 11 mars 2004, et sur les premières étapes de son institutionnalisation. Nous examinons aussi les raisons mises en avant pour la justifier, les autres acteurs qu’elle implique, et les outils utilisés pour la promouvoir. Enfin, nous interrogeons l'effectivité de cette mémoire se voulant « partagée » au niveau européen en étudiant la manière dont l'UE et ses États membres commémorent le 11 mars. Il apparaît ainsi que, si le rôle du Parlement européen a évolué, passant d'un rôle normatif à un rôle passif, cette journée de commémoration continue à n’avoir d’« européenne » essentiellement que le nom.
Le divan vide : amour et deuil en temps de confinement
Authors: Jozef Perelberg Rosine , Miqueu-Baz Christine
Published: June 2021

L’auteur décrit l’analyse d’une patiente, par téléphone, dans le contexte du confinement dû à la Covid-19, alors que la dimension physique du cadre analytique est absente. Elle interroge la théorie de Bleger et sa distinction entre cadre et processus analytiques ainsi que celle de Green sur la fonction de la structure encadrante et la fonction de l’accomplissement hallucinatoire de souhait dans le mouvement vers la symbolisation. La production d’une sculpture pendant l’analyse amorce l’élaboration d’un travail de deuil.
Désir, Douleur, Pensée. Masochisme originaire et théorie psychanalytique, de Marilia Aisenstein
Authors: Lucas Gérard
Published: June 2021

Dans son livre Désir, Douleur, Pensée, Marilia Aisenstein suit le cheminement de la notion de masochisme originaire érogène dans la théorie freudienne et dans les travaux de Michel Fain et de Benno Rosenberg. Elle place l’investissement masochique du déplaisir et de la douleur, capacité de passivité et de mise en attente de la satisfaction pulsionnelle, à l’origine même du désir, d’essence masochique, mais aussi au fondement de la pensée considérée comme « acte de chair ». Les pathologies du masochisme procèdent de l’échec du double retournement pulsionnel et d’une sexualisation secondaire du défaut du masochisme originaire.
Monopoly conditions in a Cournot-Theocharis oligopoly model under adaptive expectations
Authors: Cánovas Jose S. , Muñoz-Guillermo María
Published: June 2021

We consider the Cournot-Theocharis oligopoly model, where firms make their choices under adaptive expectations. Following [2], we assume that quantities cannot be negative, which implies that the model is nonlinear. The stability of the equilibrium point in the general case is analyzed. We focus on the conditions for which the number of competitors is reduced to a monopoly. In particular, we find necessary and sufficient conditions giving an analytic proof of the convergence to oligopoly to monopoly.
A stabilized nonconforming Nitsche's extended finite element method for Stokes interface problems
Authors: He Xiaoxiao , Song Fei , Deng Weibing
Published: June 2021

In this paper, a stabilized extended finite element method is proposed for Stokes interface problems on unfitted triangulation elements which do not require the interface align with the triangulation. The problem is written on mixed form using nonconforming \begin{document}$ P_1 $\end{document} velocity and elementwise \begin{document}$ P_0 $\end{document} pressure. Extra stabilization terms involving velocity and pressure are added in the discrete bilinear form. An inf-sup stability result is derived, which is uniform with respect to mesh size \begin{document}$ h $\end{document}, the viscosity and the position of the interface. An optimal priori error estimates are obtained. Moreover, the errors in energy norm for velocity and in \begin{document}$ L^2 $\end{document} norm for pressure are uniform to the viscosity and the location of the interface. Results of numerical experiments are presented to support the theoretical analysis.
Adoption of Blockchain Technology
Authors: Sharma Minky , Kumar Pawan
Published: June 2021

In today's world, society has become totally digitalized where technology is playing a very important role in everyone's life. Blockchain is a method that is useful in recording information and makes its difficult to change, hack, or fraud system. A blockchain is fundamentally a digital ledger of volume of transactions that is distributed across the overall network of IT system on the blockchain. This technology acts as a reliable layer in the evolution of e-commerce. Walmart has been working with IBM on a food safety blockchain solution to add transparency to the decentralized food supply ecosystem by digitizing the food supply chain process. This chapter will cover the concept and origin/emergence of blockchain technology and implications of blockchain technology in supply chain (Walmart), the significance and role of blockchain technology for the users and the stakeholders, the implications for the users, challenges faced by Walmart during the adoption of blockchain technology, and the approachability of Walmart to IBM for the implication of blockchain to their organization.
Blockchain and the Future of Digital Marketing
Authors: Khan Hameed , Kushwah Kamal Kumar
Published: June 2021

Blockchain is a unique new technology affecting the way facts are stored and shared electronically. Blockchain in digital advertising reflects clarity, security, and access to waft revenue and streamflow. It can promote digital advertising to consumers, which is profitable in spending big money on digital advertising campaigns. As per new technology, consumers can share and improve their statistics simultaneously with advertisers and advertisers. Blockchain technology can be considered to restore data control to statistical owners focused on digital advertising. Today's society has grown into a very digital one where local technology plays a significant role in everyone's lives. Moreover, society is advancing rapidly at an alarming rate with innovation in every corner and other business made online. The authors of the concept chose to find out how blockchain works could affect significant facts in digital advertising. The idea is to select challenging issues and beneficial opportunities when applying blockchain to digital marketing content.
A Text Mining Approach Agent-Based DSS for IT Infrastructure Maintenance
Authors: Elandaloussi Sidhamed , Zarate Pascale , Taghezout Noria
Published: June 2021

Information technology (IT) infrastructure refers to the combined set of network, software, hardware, applications, and all the information technology-related equipment for an enterprise IT environment. In addition, it provides the entire skeleton for an organization to continue delivering several services to its internal members (employees) and external ones (customers/partners). The interruption of services leads to a significant deterioration of the infrastructure, and at the same time, it slows down their functioning. Additionally, it can result in important loss of user trust. Therefore, we need to proactively help the technician teams to assess the quality and availability of their IT infrastructure. This study may help to build an approach for an IT infrastructure called MAITD-2 in order to classify, analyze, and take problems to closure in a short time face to a multi-criteria decision-making problem.
How to Apply System Analysis and System Thinking to Lean Six Sigma Initiatives
Authors: Galli Brian J. , Wood Lincoln C.
Published: June 2021

This study focuses on the Toyota production system (TPS) and Lean in relation to innovation. The authors examine the tools and behaviors adopted in the TPS that are absent in the Six Sigma (SS) programs and how these elements may influence innovation and quality. Finally, this research analyzes the hybrid Lean Six Sigma (LSS). System analysis involves assessing a business scenario to improve the situation, establishes the changes needed and required, and innovation and product quality as components of the system analysis. This paper undertook text excavating and focused cluster development on highlighting the level of the Lean Six Sigma representations, as explained in articles on the Lean Six Sigma, such as those that compare Lean and Six Sigma. An iterative cluster examination was adopted to understand the primary focus of research in this area. The analysis shows that there is less research on the intersection of TPS and LSS in the areas of philosophy, partners, and people. These areas represent the opportunity to enhance the application of process improvement methods.
A Study of the Role of Trust in Sharing Economy in the Tourism Industry
Authors: Choi Youngkeun
Published: June 2021

The purpose of this study is to examine the antecedents of trust in sharing economy in the tourism industry which influences consumers' purchase intentions. By presenting the concept of consumers' trust in suppliers, the author develops a model that explores the effects that explain the consumers' trust in suppliers and their intention to purchase in sharing economy. For this, this study surveys 332 Korean consumers using Airbnb and analyzes the data using AMOS 24. In the results, first, consumers' perceive responsiveness of suppliers, the degree to which consumers confide the personal information of suppliers, and consumers' disposition to trust increase their trust in suppliers. Second, consumers' trust in suppliers increases their intention to purchase. Finally, consumers' perceive the responsiveness of suppliers and consumers' disposition to trust among the antecedents of consumer's trust in suppliers increase their intention to purchase through their trust in suppliers.
The Potential of Social Media in Emerging Supply Chain Management
Authors: Khalifa Nermine M. , Elghany Mona M. Abd , Elghany Marwa M. Abd
Published: June 2021

This paper discusses the potential role of social media in managing supply chain activities for business in the developing countries and how to face unexpected challenges in these countries. Since there a limited research in the field of use social media in the supply chain, proposing the use of such platforms for third-world business might enable these enterprises to survive globally. Exploratory case studies performed by authors to drill down and figure out the issues faced by their business and how these businesses are trying to survive. Case studies are used to learn more about studied issues and unfold the hidden one. The study proposes a model of how the socialized platforms could give more visibility and knowledge discovery tool along supply chain channel. The model is extended that incorporates supply chain challenges in developing countries and the significant role of social media in proposing solutions. The proposed model will merge to business operating in developing countries context. Since the adoption of ERP systems was not enough to optimize business performance there, the proposed value of using social media as the most affordable platform will enable transparent supply chain activities along the integrated pipeline. The study provides the interrelated perspective of supply chain challenges and proposed solutions to overcome such issues. Many perceived values had been acknowledged of business such as more transparency with customers, prompt shipment notification or inventory drop, minimize supply chain risks and manage unfrozen external factors, working closely with multi-tier partners, optimize data exchange on day-to-day transactions. Social media could alert supply chain partners with potential risks. Prediction markets are proposed to adapt for better management.
Dealing With Context Awareness for Service-Oriented Systems
Authors: Guermah Hatim , Guermah Bassma , Fissaa Tarik , Hafiddi Hatim , Nassar Mahmoud
Published: June 2021

In recent years, rapid advances in the enabling technologies for mobile and ubiquitous computing, software paradigms, embedded sensor technologies, and wide range of wired and wireless protocols have been witnessed. Specifically, context-aware services-oriented applications are emerging as the next computing paradigm in which infrastructure and services are seamlessly available. Context-awareness, being an important ingredient, plays a vital role in enabling such interactive smart environments. More recently, the increasing popularity of ontologies has led to new ontology-based models of context because of their potential to support sophisticated ontology-based reasoning methods. This paper presents an architecture for the development of context-aware services based on ontologies. The authors highlight the context metamodel and discuss about reasoning process. This research also presents the semantic approach for service adaptation in context aware environment.
Influence Analysis of the Controllable Factors on the Objective Functions for Optimizing the Welding of PE 100 Pipelines for Natural Gas Distribution
Authors: Cocard Marius
Published: June 2021

The paper presents a series of experimental researches performed using the design of experiments method RSD (Response Surface Design) for modeling and optimizing the welding process of PE 100 pipelines, used in natural gas distribution. In this sense, the aim was to analyze the influence of controllable factors such as pressure, temperature and time on the objective functions, aiming to obtain certain characteristics of the welded joint. By modeling the welding process, based on the results obtained, an optimal welding procedure was established and validated to meet the conditions imposed on the objective functions.
Experimental Investigations on Capabilities of Resistance Spot Welding and MIG Brazing for Producing Corrugated Beams Using Galvanized Steel Sheets
Authors: Radu Bogdan , Ungureanu Viorel , Both Ioan , Burca Mircea , Benzar Ştefan , Dubină Dan
Published: June 2021

This paper summarized the research work carried out by a team from Department of Steel Structures and Structural Mechanics, together with Department of Materials Science and Engineering, from University Politehnica Timisoara, which tried to determine the possibility to use welding for obtaining built-up cold-formed steel beams made of corrugated galvanized steel sheets (grade S350GD+Z). There were analyzed two joining processes: MIG brazing and Resistance Spot Welding with the aim to replace the self-drilling screws used until now. The results are very promising and these solutions of joining have beside economic advantages also technical and quality ones.
Development of Green Cementitious Materials by Using the Abrasive Waterjet Garnet Wastes: Preliminary Studies
Authors: Baeră Cornelia , Vasile Vasilica , Matei Claudiu , Gruin Aurelian , Szilagyi Henriette , Perianu Ion Aurel
Published: June 2021

The constant need for recycling, waste prevention and general environmental protection represent the new directive approaches imposed by the geo-political, industrial and environmental context, at the regional, European and global level. Ensuring the environmental protection and reducing the natural resources consumption represent general purposes of the sustainable development and also considerations to implement the Circular Economy Model [1]. The present study is developed with respect to the previously mentioned principles: the waterjet cutting operations by the use of abrasive GARNETs for quality, speed and accuracy gain, are in continuous expansion, generating proportionally increasing wastes, which could be valorized by innovatively integrating them in advanced cementitious materials for the construction industry. The international research regarding the use of abrasive waterjet Garnet wastes as raw material for construction industry are at incipient stage and quite limited, but preliminary results are promising. Further studies are presently developed, considering the potential benefits and also the reduced toxicity degree of abrasive Garnet wastes. This paper offers a general overview concerning the recent studies performed in the topic of efficient use of abrasive Garnet wastes in different building materials. Supplementary, further research, both theoretical and experimental is considered, for developing green, advanced, high performance cement-based materials by using the abrasive waterjet Garnet wastes, mainly as fine grain addition or replacement in the composites.
Characteristics of Steels Joints Obtained by the FSW Process - A Brief Review
Authors: Crăcănel Mihai Octavian , Nitu Eduard Laurentiu , Iordache Daniela Monica
Published: June 2021

The FSW process has proven to be a promising process for joining steels and improving their characteristics. However, the use of wrongs technological parameters leads to the appearance of defects. In this study, the macro and microstructural characteristics of steel joints and their mechanical properties are analyzed, and the main types of defects of the butt steel joints are presented. The main conclusions of the works studied are summarized and the main development directions for research on the characterization of steel structures joined by the FSW process are identified.
Study Regarding Process of the Electrical Discharge Machining with Magnetic Activation of the Welded Joints of some Materials High Alloy Steel
Authors: Țîțu Mihail Aurel , Dumitru Mnerie , Dragomir Diana Cristina , Mnerie Gabriela-Victoria
Published: June 2021

The scientific paper presents an extensive research on modeling and optimizing the technological parameters of the process for processing by processing electric discharges with massive electrode with and without magnetic activation. Scientific research is based on real data collected from the process of electrical discharges performed on various samples extracted from areas of welded joints of metal components made of high alloy steel. The processing of experimental data was performed both classically and actively, especially the method of the central factorial experiment composed of orthogonal and rotary. The process parameters that were initially modeled and subsequently optimized were based on a series of independent variables characteristic of dimensional processing by copying the shape of the electrical discharge processing. Subsequent research conclusions and directions, as well as original contributions, are an experimentally validated point of view and worthy of consideration. All these fundamental ideas highlighted above find their explanations and the corresponding explicit treatment in the content of this scientific paper that addresses both managers at all levels and researchers.
Evaluation of the Behavior and Resistance to Cavitation Erosion of the Structure of the CuSn12-C Bronze Obtained by Thermal Treatment of Quenching and Tempering
Authors: Lazăr Iosif , Bordeasu Ilare , Mitelea Ion , Sîrbu Nicuşor Alin , Podoleanu Cornel Eusebiu , Duma Sebastian Titus , Micu Lavinia Madalina , Pîrvulescu Liviu Daniel , Hluscu Mihai
Published: June 2021

The paper presents the results of the research on the vibration cavitation erosion of the CuSn12-C bronze, subjected to the volumetric heat treatment of quenching to 700 °C, with water cooling, followed by tempering to 250 °C, with slow cooling in the air. The applied heat treatment shows the improvement of the behavior and the resistance to the cavitation erosion, compared to the initial state, of molded semi-finished product. The evaluation of the behavior and the resistance to the cavitation erosion is made by comparing the value of the parameters MDEmax, Rcav and Rz with those of the delivery state, as well as on the comparison of the characteristic curves MDE(t) and MDER(t) with those of the CuNiAl I-RNR bronze (used at propeller casting). The tests were conducted on the vibrating apparatus with piezoceramic crystals from the Cavitation Laboratory of the Polytechnic University of Timisoara.
Effect of the Welding Thermal Cycles Based on Simulated Heat Affected Zone of S1300 Ultrahigh Strength Steel
Authors: Kovács Judit , Lukács János
Published: June 2021

In the automotive industry there is an increasing demand for the wider application of high strength steels due to their favourable mechanical properties. The steel producers continuously developing new generations of high strength steels to insure higher strength and toughness properties. Since in most cases these steels are joined in welded structures, great attention must be taken to their weldability. The weldability of high strength steels has still challenges which are as follows: cold cracking sensitivity; reduction of strength and toughness of heat affected zone (HAZ); filler metal selection. Because the mechanical properties of ultrahigh strength steels are provided by using various alloying elements, micro alloys, and by different metallurgical methods, the steels may lose their outstanding properties during welding. In real welded joints the critical parts of the HAZ have small extent so their properties can be limitedly analysed by conventional material testing methods. With the help of physical simulators, the different parts of the heat affected zone can be produced in an adequate size for subsequent tests. In our research work the weldability, especially the HAZ properties of an ultrahigh strength structural steel (Rp0.2 = 1300 MPa) were investigated on thermal simulated samples with the help of Gleeble 3500 physical simulator. Three relevant technological variants for gas metal arc welding (GMAW), t8/5 = 5 s, 15 s and 30 s were applied during the HAZ simulations in the selected coarse-grained (CGHAZ), intercritical (ICHAZ) and intercritically reheated coarse-grained (ICCGHAZ) zones. Both the microstructure was studied by optical microscope and the mechanical properties were analysed by Vickers hardness tests and Charpy V-notch impact tests at -40 °C. According to the results the investigated ultrahigh strength steel was softened on account of the welding heat cycles, besides that the strength of the investigated ultrahigh strength steel can be better with the application of shorter t8/5 cooling time.
ISIM Contributions to the Development of Friction Welding Procedures
Authors: Cojocaru Radu , Botila Lia-Nicoleta , Ciucă Cristian , Verbiţchi Victor
Published: June 2021

During the last 15 years, the friction stir welding process (FSW) and the techniques developed based on the FSW principle have been a main research direction within ISIM Timisoara. The paper summarizes activities and results obtained by the FSW research team within the institute. The paper presents a synthesis that aims a briefly presentation of its own achievements and contributions from recent years regarding the development of the FSW process, especially on the following directions:- Friction stir welding on couples of similar and dissimilar materials;- Use of FSW-TIG (friction stir welding – tungsten inert gas assisted) and FSW-US hybrid processes friction stir welding - ultrasonic assisted);- Friction stir welding in protective gas environment;- Friction stir welding equipment and tools;- Systems for monitoring of the welding process. Results obtained at friction stir butt welding or by overlapping of some couples of materials that are difficult or impossible to be joined using conventional welding procedures, were presented. The results obtained during these years, as well as their scientific and technical level, have allowed the proposal for implementation of solutions that involve FSW welding for specific industrial applications (especially for the automotive field).
The Eurasian strawberry blossom weevil, Anthonomus rubi (Herbst, 1795), is established in North America
Authors: Franklin Michelle T. , Hueppelsheuser Tracy K. , Abram Paul K. , Bouchard Patrice , Anderson Robert S. , Gibson Gary A.P.
Published: June 2021

We report the strawberry blossom weevil, Anthonomus rubi (Herbst, 1795) (Coleoptera: Curculionidae), a species native to Europe, Asia, and North Africa, as established in British Columbia, Canada. This is the first report of A. rubi in North America. We provide a diagnosis of the species and compare it with other species of the genus Anthonomus Germar in Canada. This species is a pest of plants in Rosaceae Jussieu, including economically important berries such as strawberries (Fragaria Linnaeus) and raspberries (Rubus idaeus Linnaeus), and of native berries of importance to Indigenous peoples in Canada. Female weevils oviposit eggs inside developing flower buds and sever flower stalks, facilitating larval development inside damaged buds and thus reducing fruit yields. Surveys to confirm the presence of A. rubi conducted in 2020 found the weevil to be well established in cultivated and wild hosts throughout the Greater Vancouver area and Fraser Valley, British Columbia. At least one species of parasitoid wasp in the genus Pteromalus Swederus (Hymenoptera: Pteromalidae) has been found in association with A. rubi in the province. Future investigations are required to understand the biology of A. rubi in its new range, assess its impact on berries, and develop management strategies.
Anatomic Distribution of Intravenously Injected IgG Takes Approximately 1 Week to Achieve Stratum Corneum Saturation in Vaginal Tissues
Authors: Carias Ann M , Schneider Jeffrey R , Madden Patrick , Lorenzo-Redondo Ramon , Araínga Mariluz , Pegu Amarendra , Cianci Gianguido C , Maric Danijela , Villinger Francois , Mascola John R , Veazey Ronald S , Hope Thomas J
Published: June 2021

i.v. injected Abs have demonstrated protection against simian HIV infection in rhesus macaques, paving the way for the Antibody Mediated Prevention trial in which at-risk individuals for HIV received an i.v. infusion of the HIV broadly neutralizing Ab VRC01. However, the time needed for these Abs to fully distribute and elicit protection at mucosal sites is still unknown. In this study, we interrogate how long it takes for Abs to achieve peak anatomical levels at the vaginal surface following i.v. injection. Fluorescently labeled VRC01 and/or Gamunex-C were i.v. injected into 24 female rhesus macaques (Macaca mulatta) with vaginal tissues and plasma acquired up to 2 wk postinjection. We found that Ab delivery to the vaginal mucosa occurs in two phases. The first phase involves delivery to the submucosa, occurring within 24 h and persisting beyond 1 wk. The second phase is the delivery through the stratified squamous epithelium, needing ∼1 wk to saturate the stratum corneum. This study has important implications for the efficacy of immunoprophylaxis targeting pathogens at the mucosa.
Nigerian neonatologists perception and experience with retinopathy of prematurity
Authors: Adio Adedayo , Aliyu Sadiat Saka-Eletu , Balarabe Aliyu H. , Monsudi Kehinde , Popoola Dupe A, , Lawal Teslim
Published: June 2021

Background: Retinopathy of Prematurity (ROP) is an avoidable condition that affects premature infants exposed to oxygen stresses at or soon after birth. In low- and middle-income countries, like Nigeria, neonatal mortality rates are high and very few infants live to develop ROP. With recent better care, ROP is now being diagnosed.Objective: This study aimed to characterize what Nigerian neonatologists understand about ROP.Methods: At a joint meeting of Nigerian pediatric ophthalmologists and neonatologists in Kebbi State held 26-29 July 2018, questionnaires collected attendees’ perspective and experience with ROP including causes, risk factors and experiences.Results: Fifty-one neonatologists out of 71 returned a completed questionnaire (response rate: 71.8%). The male:female ratio was 1:1.8, and approximately 40% were aged 41-50 years (n=20, 39.22%). Only 3 (6.39%) had experience managing infants below 500g that survived. A majority managed babies with a mean weight of 913g ± 300.37 and age of 27.87 weeks ±2.37. Most had no access to oxygen monitors (n=39,78%). Most had 10 babies to one monitor and used average settings of 90- 95%. One third had seen a case of ROP (n=15,29.41%). Only 5.88% (n=3) were unaware of uncontrolled oxygen use as a risk factor. Only 4 (8.89%) had a functional screening team. None were aware of local screening guidelines.Conclusions: Regular educational programs, collaborative clinical presentations and webinars about ROP targeted at the neonatologists and parents, including establishment of screening programs across country will likely help reduce the burden of ROP blindness in Nigeria.