bluuebunny/crossref_metadata_2025 huggingface dataset:
5.Sınıf Öğrencilerinin Kesirlerle Toplama ve Çıkarma İşlemine Yönelik Kurdukları Problemlerin Analizi
Authors: ÖZER Ayşe , KARACAKÖYLÜ Arzu , TEKİN SİTRAVA Reyhan
Published: July 2020

Bu çalışmanın amacı, 5. sınıf öğrencilerinin kesirlerle toplama ve çıkarma işlemine yönelik kurdukları problemleri incelemektir. Araştırmada nitel araştırma yöntemlerinden bütüncül tek durum deseni kullanılmıştır. Araştırma 2017-2018 eğitim-öğretim yılında, Kırıkkale il merkezindeki iki farklı devlet okulunda öğrenim gören 40 beşinci sınıf öğrencisi ile yürütülmüştür. Katılımcıların belirlenmesinde tipik durum örnekleme tekniği kullanılmıştır. Çalışmanın verileri, altı açık uçlu sorudan oluşan problem kurma soru seti kullanılarak toplanmış ve veriler içerik analizi ve betimsel analiz yöntemi kullanılarak analiz edilmiştir. İlk olarak, öğrencilerin yazdıkları ifadeler problem, problem değil ve boş kategorileri olarak sınıflandırılmıştır. İkinci olarak, problem olarak kodlanan ifadeler, matematiksel açıdan doğru olup olmadıklarına göre analiz edilmiştir. Çalışmadan elde edilen bulgulara göre, öğrencilerin yazdıkları ifadelerin % 81.25’i problem kategorisinde, % 16.25’i problem değil ve % 2.5’i boş kategorisinde yer almıştır. Çalışmanın amacı doğrultusunda problem olarak değerlendirilen ifadelerdeki hatalar incelenmiştir. Buna göre, parça-bütün ilişkisini kuramama, kesir sayılarına doğal sayı anlamı yükleme, problemde ifade eksikliği ve veri eksikliği olarak isimlendirilen dört farklı hata türü tespit edilmiştir.
Non-diffracting optical fields with a Fourier spectrum azimuthally modulated by a periodic phase function
Authors: Rincón Iván , Arrizón Victor
Published: July 2020

We analyze non-diffracting fields (NDFs) with Fourier spectra that are phase-only azimuthally modulated. In this context, we identify a weak interference regime of the different Bessel beams that compose each NDF, which allows the use of a simple method to control several features of this field. The approach is illustrated considering periodic sinusoidal and binary azimuth phases. For generation of the NDFs, we employ an experimental setup that operates using a sequential double phase modulation in a spatial light modulator.
Design of Ge1-xSnx-on-Si waveguide photodetectors featuring high-speed high-sensitivity photodetection in the C- to U-bands
Authors: Li Xin Yu , Wang Jia Yao , Liu Yu Fei , Chen Jing Jing , Du Yan , Wang Wei , Cai Yan , Ma Jian Ping , Yu Ming Bin
Published: July 2020

We present the design ofGe1−xSnx-on-Si waveguide photodetectors for the applications in the C- to U-bands. The GeSn photodetectors have been studied in respect to responsivity, dark current, and bandwidth, with light butt- or evanescent-coupled from an Si waveguide. With the introduction of 4.5% Sn into Ge, the GeSn waveguide PD with evanescent-coupling exhibits high responsivity of 1.25 A/W and 3 dB bandwidth of 123.1 GHz at 1.675 µm. Further increasing the Sn composition cannot improve the absorption in the U-band significantly but does lead to poorer thermal stability and higher dark current. This work suggests a promising avenue for future high-speed high-responsivity photodetection in the C- to U-bands.
Improving the –3  dB bandwidth of micro-size LEDs through p-electrode patterns for visible light communication
Authors: Tan Lijun , Wang Kai , Xie Zijing , Zhong Ming , Lu Linsheng , Wang Hong , Yao Ruohe
Published: July 2020

We systematically studied the effect of p-electrode patterns on the optical properties and

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3

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bandwidth of micro-size LEDs. The current spreading distribution can be effectively improved via adjusting the number and shape of the p-electrode branch, thus increasing the injection saturation current density and decreasing the series resistance. Compared with the micro-size LED using a disk p-electrode, the saturation light output power and

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3

d
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bandwidth of the micro-size LED using a six-branches spiral p-electrode increase by 39.48% and 76.61%, respectively. Such a p-electrode pattern is a promising solution for micro-size LED applications in both illumination and visible light communication systems.
Accurate measurements of longitudinal temperature distribution of PPLN crystal in the process of second-harmonic generation
Authors: Ivanov Grigorii Yu. , Cherpak Pavel S. , Konyashkin Aleksey V. , Ryabushkin Oleg A.
Published: July 2020

Phase-matching temperature tuning curves and longitudinal temperature distribution of periodically poled lithium niobate (PPLN) crystal were measured in the process of second-harmonic generation (SHG) of 1070 nm pump wavelength using tiny transparent piezoelectric crystals as the temperature sensors. The temperatures of the crystal sensors placed along the PPLN length were determined directly by measuring the induced frequency shifts of their piezoelectric resonances, which were excited in a noncontact manner by a probe radio-frequency electric field. Such temperature sensors do not suffer additional heating conditioned by absorption of scattered radiation and also do not have any contact wires. Due to the high

Q

factors of piezoelectric resonances, the measurement accuracy of 0.05°C was achieved for a local determination of PPLN surface temperature during SHG. The self-consistent theoretical model that describes the SHG process in the presence of induced nonuniform temperature distribution of the nonlinear-optical crystal is introduced.
Coherent multi-mode dynamics in a quantum cascade laser: amplitude- and frequency-modulated optical frequency combs
Authors: Silvestri Carlo , Columbo Lorenzo Luigi , Brambilla Massimo , Gioannini Mariangela
Published: July 2020

We cast a theoretical model based on effective semiconductor Maxwell-Bloch equations and study the dynamics of a multi-mode mid-infrared quantum cascade laser in a Fabry-Perot configuration with the aim to investigate the spontaneous generation of optical frequency combs. This model encompasses the key features of a semiconductor active medium, such as asymmetric, frequency-dependent gain and refractive index as well as the phase-amplitude coupling of the field dynamics provided by the linewidth enhancement factor, and some specific resonator features, such as spatial hole burning. Our numerical simulations are in excellent agreement with recent experimental results, showing broad ranges of comb formation in locked regimes, separated by chaotic dynamics when the field modes unlock. In the former case, we identify self-confined structures travelling along the cavity, while the instantaneous frequency is characterized by a linear chirp behaviour. In such regimes, we show that OFCs are characterized by concomitant and relevant amplitude and frequency modulation.
Perceptions of commercial hospitality space: The case of a UK university campus hotel
Authors: Hay Brian
Published: July 2020

Over the past decade, there has been a growth in the number of hotels built on university campuses, in Europe, Asia and the United States. Originally, such hotels were often associated with a university’s hotel school and their hospitality programme; however, an increasing number of full-service campus hotels have recently been developed, with no such connections. Through 30 interviews with Heriot-Watt University staff and students, this study explores their perceptions of a newly built commercial hotel on their campus. The findings highlighted the different opinions held by students and staff as to the benefits of a campus hotel and suggested that they were viewed by both as contested hospitality spaces. However, this study submits that if they were more welcoming to students and staff and were better aligned with the ethos of the university, this would aid in their acceptance into the wider university community.
The antecedents and consequences of luxury hotel consumers’ sense of belonging
Authors: Peng Norman , Chen Annie
Published: July 2020

This research aims to conceptualize the antecedents and consequences of luxury hotel consumers’ sense of belonging (SB). This study incorporates an ‘expectation’ variable into a stimulus-organism-response model to investigate the influence of perceived experiential value on consumers’ satisfaction, SB and behavioural intentions. In total, 489 Taiwanese consumers were recruited, and structural equation modelling was used to examine the proposed model. The results demonstrate that perceived experiential value influences consumers’ satisfaction, which in turn influences their SB. Moreover, an SB can affect consumers’ consumption intentions. Furthermore, expectations positively moderate the relationship between perceived experiential value and consumer satisfaction.
Ways to enhance embodied learning in Dalcroze-inspired music education
Authors: Juntunen Marja-Leena
Published: July 2020

Drawing on the phenomenology of embodied learning, this article presents suggestions for ways that embodied learning can be enhanced in Dalcroze-inspired music education. Here, embodied learning refers to learning from interactional experiences of the self with the physical and social environment through senses, perceptions and mind–body action and reaction. It is suggested that embodied learning can be efficiently facilitated through teaching that promotes multisensory perceptions, images, integration and experiences, while also motivating physical, social, emotional and intellectual participation. Furthermore, promoting social interaction as well as interaction between perceptions, thoughts, emotions and actions could be regarded essential. Embodied learning can be reinforced by pedagogical actions, such as advancing awareness and a sense of self, triggering mental images, integrating different functions, building a balance between mental and physical activities, and fostering positive emotions and experiences in learning situations. By reflecting on experience, embodied learning becomes more explicit and shareable.
Decolonizing the knowledges of young children through the temporal arts
Authors: Arculus Charlotte
Published: July 2020

In this article I take a new materialist and posthuman approach to ask: how can improvisation in the temporal arts reconceptualize and broaden our adult understandings of young children’s communication and knowledge? I draw on two filmed events from the recent SALTmusic project. This filmed event data has been returned to many times to illustrate unique and particular events that took place in the past, but – when re-viewed and retold – constitute a new and particular happening or entanglements between the original event, the video technology that brings the past into the present, and the philosophical thinking that the events inspire. In the first part of this article, I critique the fixation on young children being made to talk as early as possible, and call for improvised music and arts practices as decolonizing pedagogies where children’s own knowledges are able to inform and shape their education. By revisiting Trevarthen and Malloch’s Communicative Musicality and Stern’s ideas on vitality affect and the present moment to see how they entangle and transform within new materialist and posthuman philosophy, I question and critique the developmental discourses that conceptualize young children’s musical behaviours as proto-music and, instead, frame the temporal arts, within a posthumanism, as having the potential to cut through the subject/object binary. I explore children’s porous and entangled subjectivities, through the posthuman idea that human identity and human thought connect and are made and remade beyond the individual, bounded human subject, and that children’s relationship with the present moment is a vital capability or knowledge at the heart of what it means to improvise and much more than a developmental stage.
Performing science-fiction fandom through debating controversy: Communicative leisure, collective memory and Rogue One: A Star Wars Story, below the line at The Guardian
Authors: Spracklen Karl
Published: July 2020

Star Wars has become one of a handful of science-fiction franchises that have defined and shaped what Adorno calls the modern culture industry. The original trilogy challenged the way Hollywood financed and marketed its movies and made George Lucas incredibly rich. Star Wars fans bought tickets for re-releases, special editions and the notoriously egregious prequels, as well as a seemingly endless range of merchandise. When Lucas sold the franchise to Disney new movies were promised, including what became the stand-alone prequel Rogue One: A Star Wars Story. In this article, I am interested in exploring how people react in publicly accessible online spaces, as these are key spaces for the performativity of digital communicative leisure. Specifically, I am interested in how fans of the original trilogy and the Star Wars franchise critiqued or defended the film and Star Wars more broadly through a detailed analysis online comments below the line reacting to review by film critic Mark Kermode published in a middle-class, liberal newspaper: the UK-based The Guardian. This review and its comments below the line represent a snapshot of what middle-class liberals might feel able to write about the film and their own Star Wars fandom. This analysis will also be extended to critiques made by people seeking to distance themselves from Star Wars and all that Star Wars fandom may entail, as a performativity of anti-fandom. I will show that for fans collective memory is used to try to construct authenticity and ownership of Star Wars, but that collective memory is only ever temporarily negotiated.
Historical landmarks of the management of major urban logistics projects in Imperial Timisoara
Authors: Somkereki Andreea-Eva , Ioan Petrișor
Published: July 2020

This article follows an holistic approach to the management of the major urban logistics projects of Imperial Timisoara. The research conducted so far has been based on unilateral treatments: either exclusively historical or engineering. Research of such projects requires multi-scientific and multidisciplinary treatment angles. Our investigative optics is a managerial-holistic one, which integrates, besides the historical, technical / technological aspects, the architectural aspects, along with the multicultural, socio-human, ethnic, anthropological, urban, structural, processual and functional aspects. In this sense, the strategic references of urban essence are related to the potential of Timisoara city to have been able to carry out such projects, in the contexts specific to the different periods of its logistic development. The multitude of researched data sources, information and documents enables us to innovate the approach of major urban logistics projects, using the logic of public management, in a holistic, integrative vision. We are convinced that such research, in such a way, will contribute substantially to a deeper understanding of Timisoara's contribution to his own Europeanization and the region he was part of, the Imperial Historical Banat.
Effect of short term storage on wheat quality parameters
Authors: Gyimes Ernő , Csercsics Dóra , Magyar Zoltán
Published: July 2020

Eleven samples of registered wheat varieties of bread with diverse technological qualities were used in this study. The samples were devided into two groups. The first group including all the 11 variety were stored for 3 months, while the second group of the samples were stored for 9 months at an ambient temperature. The results of quality evaluation showed that 5 soft wheat varieties (GK Csongrád, GK Garaboly, GK Hattyú, GK Holló, GK Nap) and  6 hard wheat varieties (GK Ati, GK Békés, GK Élet, GK Kalász, GK Petúr, GK Verecke) were involved in the study. Further, the flour yield, the gluten index and the water absorbance capacity has significantly decreased after 9 months storage time when compared to 3 months storage interval.
Identitáspolitikák válsága
Authors: Tóth Andrea
Published: July 2020

Korunk társadalmait sokféle jelzővel lehet és szokás leírni; többek között beszélünk hálózati társadalomról, az információs társadalom valós virtualitásáról, technokulturális társadalomról, vagy globalizált társadalomról. Ezekben az „új” információs hálózatok által hajtott, globális kapitalizmus által uralt, radikális technológiai változásokkal áthatott társadalmakban a végtelen számú elérhető kapcsolat és a nyitott tartalom-alakítás ellenére egyre jelentősebbé válik a több síkon érzékelhető és értelmezhető szakadék problémája, a társadalmi szakadék elmélyülése a hatalomhoz/információhoz/financiális tőkéhez való hozzáférés mentén. A jelen társadalmi életet minden szinten a töredezettség, a részlegesség, a különbségek hangsúlyozása, a „metaszint” felbomlása hatja át; az a posztmodern állapot, ahol a „poszt” elsősorban a nagy magyarázó narratívák, az egységesség, az egyetemesség „utániságot” jelenti társadalomtörténeti, szociológiai és gazdasági értelemben egyaránt. Ezek az egyre táguló szakadékok egyre nagyobb hullámokat vetnek a posztmodern társadalmakat jellemző, az etnicitás, a faj, a nem, a szexualitás, a vallás, a földrajzi régió, a kontinens, a nemzet történelmileg elhallgatott narratíváit kihangosító identitáspolitikák körül is. Röviden: a 21. század elején az identitáspolitikák „újratárgyalásának” lehetünk tanúi. Tanulmányomban arra teszek kísérletet, hogy bemutassam az identitáspolitikák újratárgyalásának folyamatát a centrum és a félperiféria késő modern társadalmaiban, különös tekintettel a centrumot és a félperifériát elválasztó társadalmi és kulturális különbségekre. A tanulmány a személyes etnográfia eszközeit használó útkeresési kísérlet arra, hogy miként juthatunk el a különbségekre építő részleges „mikro-politikák” felől egy reakciós fundamentalizmust elkerülő, posztidentitáspolitikai makro-politikai platformra, ahol a közös cselekvés kiindulópontja nem a „kik vagyunk?” kérdés megválaszolása, hanem egy közös jövő építése a „mit akarunk?” alapján.
Mirror world and planetary orbit distribution in the solar system（Geometric derivation and physical significance of the distribution law of the orbits of the solar and solar-like planets）
Authors: Hu jun
Published: July 2020

There are different opinions on the distribution formula of the distance between Titius-Bode's planets
[1,-5]Some people use this theory to prove that exoplanet systems have the same regularity
[4], But the emergence of the Hot Jupiter has made many people less convinced of the empirical formula Titius-Bode law. The explanation of the Titius-Bode law in our past theory is not convincing because of the incorporation of too many traditional theories and concepts, and almost all the papers that explain the distribution of planets are in the present theoretical framework
[2-5]To explain. In fact, the distribution law of the distance of planets is related to the cause of gravitation. I dont know the cause of the gravitation and the process of action. The "planetary distance distribution rule" cannot be interpreted correctly. To use "six-level multidimensional symmetric complex geometry"
[7] to understand the genesis of the derivation of the solar system's orbit, the actual application is a simple and easy-to-understand explanation of the "gravity of six-level multidimensional symmetric complex geometry"
[8], so understanding this article requires understanding" Six-level symmetry theory of gravity'
[7, 8].
Le régime méditerranéen dans la presse quotidienne nationale française
Authors: Juanals Brigitte
Published: July 2020

Le régime méditerranéen fait référence à un ensemble de traditions culinaires et culturelles issues des pays du bassin méditerranéen. L’analyse du traitement médiatique du régime méditerranéen est centrée sur la distribution et la circulation des discours, des représentations sociales et des acteurs mis en visibilité dans la presse. La méthodologie associe une approche quantitative et statistique à une approche qualitative ancrées toutes deux dans l’étude des discours. Sur une période de vingt ans (de 2000 à 2019), il apparaît que le régime méditerranéen constitue un thème d’intérêt suivi dans la durée par la presse nationale française selon cinq orientations thématiques dominantes et un univers lexical de nature patrimoniale, culinaire et environnementale, scientifique et sanitaire. Un nouvel univers lexical et de sens autour des végétaux émerge, porteur de représentations et de valeurs positives à l’intersection de la gastronomie, de la production locale et de préoccupations écologiques.
Actual plays : quand le jeu de rôle sur table se médiatise
Authors: Roux Ugo
Published: July 2020

On observe depuis quelques années la diffusion d’émissions qui présentent des parties de jeu de rôle sur table : les actual plays. Les actual plays répondent à des enjeux médiatiques qui se manifestent en termes d’auditoire, de notoriété et de divertissement. Des moyens conséquents sont alors mobilisés pour développer ces émissions afin de les rendre les plus attractives possibles pour les spectateurs comme pour les joueurs. Il apparaît cependant qu’aucune étude n’ait jamais formalisé ces moyens. L’objectif du présent travail est donc de faire ressortir les modalités de médiatisation et de spectatorisation des actual plays afin de les examiner et de voir si celles-ci font appel à une standardisation ou une fragmentation des pratiques. Pour ce faire, nous avons réalisé une analyse comparative exploratoire sur la base d’une grille d’analyse créée ad hoc. La comparaison semble dégager un modèle de pratiques standardisées dans les actual plays.
Affiliation and negative assessments in peer observation feedback for foreign language teachers professional development
Authors: Batlle Jaume , Seedhouse Paul
Published: July 2020

The growing use of peer observation in teacher professional development has created an interest in understanding how it is carried out and what the benefits are. Post-observation feedback is a crucial component of peer observation practices. This study seeks to contribute to a better understanding of peer observation feedback in foreign language teacher’s professional development. Adopting a conversation analysis perspective, we aim to establish how the interactional infrastructure is developed between observers and observees after a negative assessment during peer observation feedback. The results show that, when the observer is assessing a specific teaching action negatively and the observee expresses alignment with the observer’s position, the observer adopts an affiliative stance through the use of his/her epistemic expertise in two ways: either putting his/her self in the shoes of the observee or, in other cases, expressing the affiliative stance by appealing to the epistemic community to which they both belong.
Does Hawking predict the correct temperature of a black-hole?
Authors: Chandra Kapil
Published: July 2020

In our study of the validity of Hawking’s predicted radiation temperature of a black-hole, we found that the calculated temperature is another form of Zeldovich’s expression for the cosmological constant. We reasoned that as Zeldovich predicted the extreme value of cosmological constant thus Hawking might have also predicted an extreme temperature. However, the actual temperature might be something different. This result implies that all predictions based on Hawking’s radiation temperature might be incorrect.
‘Crypto-investment’ in International Economic Law: A First Sketch
Authors: Prieto Munoz Jose Gustavo
Published: July 2020

In January 2009, Bitcoin was launched as the first ‘cryptocurrency’, a term used to refer to a ‘digital representation of value’ operating with Distributed Ledger Technology (DLT). Commonly known as ‘Blockchain’, DLT has been an object of study in different legal disciplines, which seek to understand its financial and legal impacts. However, international law literature is still silent regarding the impacts that DLT technology could have on the different legal regimes. This article contextualizes DLT as digital governance ‘infrastructure’ that could affect the way that public authority is exercised; in this sense, cryptocurrencies are the product of such infrastructure. Taking this notion into account, it is further argued here that the concept of ‘crypto-investment’ could be useful in international investment law when certain conditions come into play.
Analysis of genetic determination of partial resistance to white rot in sunflower
Authors: Delgado Santiago Germán , Castaño Fernando , Cendoya Maria Gabriela , Salaberry Maria Teresa , Quiróz Facundo
Published: July 2020

Sunflower is usually affected by white rot (WR), a disease produced by Sclerotinia sclerotiorum. Thus, breeders select WR resistant hybrids by means of field experiments replicated in different environments. The WR selection will be effective when the correlation between the phenotype and the set of genes controlling the trait is high. This study aimed to estimate the relationship between the genotype and phenotype for components of WR partial resistance in hybrids. Also, the genotypic merit of these hybrids is estimated to determine their value in breeding programs. To this end, 37 cultivars were used during three years in Balcarce (southeast of Buenos Aires Province, AR). Plants were inoculated with S. sclerotiorum in their capitula. The WR variables evaluated were the relative incubation period (RIP), the daily lesion growth (DLG) and the relative DLG. By using transformed data, the degree of genetic determination (DGD) reached values of 0.78 (RIP), 0.63 (relative DLG) and 0.35 (DLG). Although all error variances and their relative contributions to the total variance had the highest values, the DGD values for RIP and relative DLG were higher than those reported in the bibliography. The best linear unbiased predictors (BLUPs) detected six hybrids with most suitable genetic merit for RIP and relative DLG. The BLUP correlation coefficient suggested that resistance genes involved in RIP and relative DLG were not the same. Thus, these genes could be used simultaneously to develop new sunflower hybrids with more complex WR resistance.
ANFIS based system identification of underactuated systems
Authors: Chawla Ishan , Singla Ashish
Published: July 2020

In this work, the effectiveness of the adaptive neural based fuzzy inference system (ANFIS) in identifying underactuated systems is illustrated. Two case studies of underactuated systems are used to validate the system identification i. e., linear inverted pendulum (LIP) and rotary inverted pendulum (RIP). Both the systems are treated as benchmark systems in modeling and control theory for their inherit nonlinear, unstable, and underactuated behavior. The systems are modeled with ANFIS using the input-output data acquired from the dynamic response of the nonlinear analytical model of the systems. The dynamic response of the ANFIS model is simulated and compared to the nonlinear mathematical model of the inverted pendulum systems. In order to check the effectiveness of the ANFIS model, mean square error is used as the performance index. From the obtained simulation results, it has been perceived that the ANFIS model performed satisfactorily within the trained operating range while a minor deviation is seen outside the trained operating region for both the case studies. Furthermore, the experimental validation of the of the proposed ANFIS model is done by comparing it with the experimental model of the rotary inverted pendulum. The obtained results show that the response of ANFIS model is in close agreement to the experimental model of the rotary inverted pendulum.
Crystal structure of [(Z)-O-isopropyl N-(4-nitrophenyl)thiocarbamato-κS]-(triphenylphosphine-κP)-gold(I), C28H26AuN2O3PS
Authors: Yeo Chien Ing , Tiekink Edward R.T.
Published: July 2020

C28H26AuN2O3PS, triclinic, P1̄ (no. 2), a = 8.6339(3) Å, b = 11.0503(3) Å, c = 14.5091(5) Å, α = 95.615(2)°, β = 105.606(3)°, γ = 94.009(2)°, V = 1320.14(8) Å3, Z = 2, R
gt(F) = 0.0332, wR
ref(F
2) = 0.0886, T = 100 K.
Civil Society Groups Involved with International Students in Japan: Typology and Social Capital Generation
Authors: Ivanova Polina
Published: July 2020

This article explores the interaction between civil society organizations in Japan and incoming international students to illustrate how the nonprofit sector can be conducive to social capital generation in diverse groups in the short-term. Based on interviews, participant observation and document analysis, this study examines motivations of nonprofit staff and volunteers to get involved with international students and connects them to students’ expectations and needs. The paper suggests ways of improving engagement between Japanese civil society organizations and international students to benefit all the stakeholders.
Biochemical activity and bioassay on maize seedling of selected indigenous phosphate-solubilizing bacteria isolated from the acid soil ecosystem
Authors: Fitriatin Betty Natalie , Fauziah Dita , Fitriani Fabira Nur , Ningtyas Dewi Nurma , Suryatmana Pujawati , Hindersah Reginawanti , Setiawati Mieke Rochimi , Simarmata Tualar
Published: July 2020

Phosphorus availability is the major constraint for plant growth in the acid soil ecosystem, due to high fixation by Al and Fe. Microbial fertilizers such as phosphate-solubilizing bacteria (PSB) can increase P availability in soils for root uptake. The objective of the research was to verify the ability of four isolates of PSB isolated from acid soil to solubilize unavailable inorganic phosphate, produce phosphatase, malic acid and indole acetic acid (IAA), as well as increase plant height of maize seedling. The bioassay by growing maize seedling in liquid nutrients has been performed to study the response of seedling to PSB inoculation. The experimental design of bioassay was a randomized block design with five replications. The results showed that the isolates RR 1 and SPR 4 had a relatively high solubilizing index. Moreover, all the PSB isolates had the ability to produce phosphatase and IAA and dissolve P. The performance of PSB-inoculated seedling was better visually and the root length was increased by 66.7–74.5% compared to the control. This result concludes that the species of four isolates needs to be identified by a biomolecular method and formulated as biofertilizers for increasing the maize productivity in the acid soil ecosystem.
The European Union After the Rome Declaration: A New Opening or a New Euro-pessimism?
Authors: Wróblewski Łukasz D.
Published: July 2020

The European Union has been a rare feat achieved by the continent’s societies. Today, almost 15 years since its biggest enlargement and 10 years since the signing of the Treaty of Lisbon, Europe is facing unprecedented challenges, both globally and internally. It long seemed that the way to take on the challenges of the changing world was through united diversity—a stance that is no longer a given. Adopted on the 60th anniversary of the Treaty of Rome, the Rome Declaration was supposed to address the greatest challenges lying ahead of the EU and its member states.

Based on an analysis of the Rome Declaration in the light of the Treaty of Lisbon, this paper outlines the biggest threats and possible scenarios of the European integration process. The ruminations below indicate that the declaration signed by the leaders of the 27 member states by and large successfully determined the key problems of European integration. However, contrary to the appearances, it fails to address them in substance. The overriding research method adopted in this study was a critical analysis of the subject literature, as well as EU studies and documents.
Reactions and interactions between peri-groups in 1-dimethylamino-naphthalene salts: an example of a “through space” amide
Authors: Wannebroucq Amélie , Jarmyn Andrew P. , Pitak Mateusz B. , Coles Simon J. , Wallis John D.
Published: July 2020

8-Dimethylaminonaphthalene-1-carbaldehyde reacts readily at 0°C with benzoyl or pivaloyl chloride by O-acylation and formation of a N–C bond (1.566(2)–1.568(3) Å) between the peri-substituents to give a salt. The reaction is promoted by electron donation from the dimethylamino group to the carbonyl group, akin to the properties of an amide. In contrast, the corresponding methyl ester and N,N-diisopropylamide react with acid in ether by protonation of the dimethylamino group and formation of a hydrogen bond to the carbonyl group, while under similar conditions the N,N-dimethylamide undergoes ready hydrolysis to the acid. The structures of products are determined by X-ray crystallography, and from the latter hydrolysis crystals containing zwitterionic 1-dimethylammonium-naphthalene-8-carboxylate and the corresponding O-protonated cation along with dimethylammonium and triflate ions were obtained.
K-band luminosity–density relation at fixed parameters or for different galaxy families
Authors: Deng Xin-Fa , Wen Xiao-Qing , Xin Yong , Qi Xiao-Ping , Ding Ying-Ping
Published: July 2020

Using the apparent magnitude-limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 10, we examine the K-band luminosity–density relation at fixed parameters or for different galaxy families. It is found that the limiting or fixing galaxy properties, such as galaxy morphology, stellar mass, and color, exert substantial influence on the environmental dependence of the K-band luminosity of galaxies, which suggests that the K-band luminosity–density relation is likely attributable to the relation between these galaxy properties and density.
Autism spectrum disorder in the United Arab Emirates: potential environmental links
Authors: Virolainen Samuel , Hussien Wejdan , Dalibalta Sarah
Published: July 2020

Autism spectrum disorder (ASD) has been experiencing an increase in global prevalence in recent decades. While many factors could account for this reality, certain environmental links have been shown to contribute to ASD development and etiology. The Middle East has had relatively little published research on ASD etiology although statistics indicate that ASD affects 1 in 146 births in the United Arab Emirates (UAE). This review therefore aims to examine potential causes of ASD within the UAE specifically, focusing on environmental links that may contribute to the rise in ASD cases in this population. Significantly, suboptimal breastfeeding practices, high levels of vitamin D deficiency, increased exposure to pollution, pesticides and heavy metals within the UAE may all be potentially important contributing factors to ASD in this population. Our findings support the notion that there are key links between various environmental factors and ASD prevalence in the UAE. The lack of knowledge and much research on ASD within the UAE deeply necessitates further studies on its etiology as it poses a serious public health challenge in the region and globally.
Logik der Ökonomisierung
Authors: Bohmann Ulf , Lindner Diana
Published: July 2020

Von der Beobachtung miteinander korrespondierender Zeitdiagnosen ausgehend, wird in diesem Beitrag eine weite Perspektive auf Ökonomisierung eingenommen. Es wird der Frage nachgegangen, wie und warum sich Ökonomisierung nach wie vor so hartnäckig hält. Wir schlagen in Abgrenzung zu einschlägigen aktuellen Theorieangeboten vor, einer institutionentheoretischen Deutung zu folgen, die eine gesellschaftstheoretische Ebene der funktionalen Differenzierung mit der subjektiven Ebene der Handlungspraxis dergestalt verbindet, dass die ökonomische Intrusion sinnrekonstruktiv erschlossen werden kann. Zentral für unsere Argumentation sind normative Leitbilder, die für jede Institution charakteristisch sind. In einem sozialkonstruktivistischen Verständnis arbeiten wir heraus, dass in der Spätmoderne Institutionen maßgeblich von den autonomiegetriebenen Gestaltungsabsichten der Subjekte erhalten und verändert werden. Mit dieser Perspektive wollen wir am Beispiel des Arbeitslebens mithilfe des Konzeptes des Berufsethos zeigen, wie sich die Logik der Ökonomisierung typischerweise als praktisches Ausbalancieren von Leitbildkonkurrenz manifestiert. Wir arbeiten dabei heraus, dass Ökonomisierung idealtypisch auf drei Arten subjektiv bewältigt wird: durch offensive Verweigerung, affirmative Anpassung oder widerwillige Anpassung. Anhand einer sekundäranalytischen Rekapitulation dreier empirischer Studien in unterschiedlichen professionellen Feldern, versuchen wir nahezulegen, wie der dritte Typus wirksam ist. Die Subjekte institutionalisieren damit, so unser Fazit, einen Dauerkonflikt zwischen ökonomischen und nicht-ökonomischen Leitbildern, und verhindern sowohl eine vollständige Entdifferenzierung, als auch eine autonome Weiterentwicklung normativer Leitbilder.
Ordnungen universitärer Lehre
Authors: Münte Peter , Scheid Claudia
Published: July 2020

Im Mittelpunkt des Artikels steht die Rekonstruktion zweier kontrastierender Formen akademischer Lehre. Grundlage bilden Interaktionsaufzeichnungen, die in den Nullerjahren an einer deutschsprachigen Universität angefertigt wurden. Für die vorliegende Untersuchung wurden vergleichsweise kurze Passagen sequenzanalytisch ausgewertet. In dem einen Fall ist die Interaktionsstruktur der Lehre durch die Orientierung an organisatorischen Vorgaben geprägt, in dem anderen durch die Bindung an eine Disziplin, die es in Forschung und Lehre zu vertreten gilt. Mit der vorgelegten Analyse wird in mehrfacher Hinsicht ein Beitrag zur Erforschung akademischer Lehre geleistet: Wie lässt sich akademische Lehre auf der Ebene der Interaktionsstruktur bestimmen? Mit welchen Differenzen ist in diesem Zusammenhang zu rechnen? Welche sozialisatorischen Implikationen haben die rekonstruierten Interaktionsformen? Inwiefern könnten die festgestellten Differenzen Ausdruck einer Reformdynamik an den Universitäten sein?
Zur Gesichtslosigkeit der Online-Lehre
Authors: Kollmer Imke
Published: July 2020

Die Verlegung der universitären Lehre in den digitalen Raum wird vor allem hinsichtlich ihrer begrenzten technischen Möglichkeiten, des Mehraufwandes und der Mehrfachbelastungen diskutiert. In den geistes- und sozialwissenschaftlichen Disziplinen, in denen Vorlesungen und Seminare zumeist über eine textliche Grundlage verfügen, haben sich in diesem Zusammenhang zwei dominante Modi herausgebildet: Die Verlagerung ins Selbststudium und videobasierte Formate. Die mit videobasierten Formaten einhergehenden Schwierigkeiten stehen im Mittelpunkt der folgenden Ausführungen. Sie sind, so die zentrale These, nicht Produkt des Digitalen. Sie korrespondieren vielmehr mit der strukturellen Verfasstheit der universitären Lehre respektive der seminaristischen Praxis im Präsenzmodus. Diese ist nicht nur die Vermittlung von fachspezifischen Wissensbeständen, sondern auch eine gemeinsame soziale Praxis, deren Konstitutionsbedingungen im digitalen Semester allzu oft gar nicht erst hergestellt werden können.
“The Siren Song of Yoga”
Authors: Petrzela Natalia Mehlman
Published: July 2020

Yoga writ large helps illuminate the nature and the limits of evolving countercultures. Yoga in the 1960s and 1970s United States operated as a crucial vehicle for expressing critiques of patriarchy and sexual repression. Expressive forms of sexuality became pervasive in yoga culture, symptoms of the increased discursive and physical openness of the sexual revolutions. The broad-ranging spirituality associated with yoga often challenged rigid religiosity, frequently by pitting Eastern against Western belief systems, often oversimplifying this duality. The American encounter with yoga has been a vehicle for the rise of a capacious spirituality, often defined as “New Age” and more recently subsumed within the “spiritual-but-not-religious” movement, which today over 30 percent of Americans reportedly embrace. Yoga has been a crucial vehicle for expressing how Americans see themselves as spiritual, sexual, and physical beings, and the 1960s and 1970s represent a period in which these identities were articulated, if not always enacted, as distinctly countercultural. At the same time, this famously experimental era paradoxically corresponded to the incorporation of yoga into a popular mainstream fitness culture. The mainstreaming of yoga at times sapped this spiritual practice of a significant measure of radicalism and at others merely expressed that radicalism differently.
Farklı Pulpa Kaplama Materyallerinin Toplam Oksidan ve Antioksidan Kapasitelerinin İnsan Dental Pulpa Kök Hücreleri Üzerinde Değerlendirilmesi
Authors: AKSU Seçkin , GÜRBÜZ Taşkın
Published: July 2020

Amaç: Bu çalışmanın amacı, beş farklı pulpa kaplama materyalinin (Mineral
Trioksit Agregat, Biodentin, Pulpine Mineral, Endo Repair
ve Çinko Oksit Öjenol) toplam oksidan ve
antioksidan seviyelerinin insan dental pulpa kök hücreleri üzerinde
değerlendirilmesidir.Gereç ve Yöntemler:Çalışmamızda Amerikan Tipi
Kültür Koleksiyonu insan dental pulpa kök hücreleri kullanılmıştır. Filtre
difüzyon testi, ISO standartlarına göre uygulanmıştır. 24. ve 72. saatlerin
sonunda biyokimyasal analiz yapılmıştır(n = 3). Ölçümler arasında bağımsız grup
karşılaştırmaları için Kruskal Wallis Varyans Analizi ve Mann-Whitney U testi
kullanılmıştır.Bulgular: 24 saatlik değerlendirme sonucunda, sadece Mineral Trioksit Agregat,
kontrol grubuna benzer antioksidatif koruma gösterirken (p> 0.05), diğer
gruplar bu seviyenin altında kalmıştır. Tüm grupların toplam antioksidan
durumunun 24 ve 72 saat arasında arttığı belirlenmiştir (p <0.05). 72 saatin
sonunda, en iyi koruma Biodentin ve Pulpine Mineral gruplarındai en zayıf
koruma ise Çinko Oksit Eugenol grubunda bulunmuştur (p <0.05).Sonuçlar: Yapılan
analize göre, tüm pulpa kaplama materyallerinin insan dental pulpa kök
hücreleri üzerinde hem oksidatif etki hem de antioksidan savunma mekanizmasını
uyarıcı etkiye sahip olduğu belirlenmiştir. İlk 24 saatte en yüksek korunma Mineral Trioxide Aggregate grubunda, 72
saatte ise; Biodentin ve propolis içeren Pulpine Mineral gruplarında
bulunmuştur. ZnOEu grubunun antioksidatif etkisinin yetersiz olduğu tespit
edilmiştir. Propolis içerikli pulpa kaplama materyalinin kök hücreler
üzerindeki olumlu etkisi nedeniyle kalsiyum fosfat içerikli ürünlere iyi bir
alternatif olabileceği ortaya konulmuştur.Anahtar Kelimeler: Diş pulpa kaplaması, kalsiyum fosfat, serbest radikaller, propolis.
Ortognatik Cerrahinin Maksiller Sinüs Ventilasyon Hacmi Üzerine Etkisinin KIBT ile Değerlendirilmesi
Authors: DUYAN Hazal , KELEŞ EVLİCE Burcu
Published: July 2020

Amaç:Bu çalışmanın amacı Le Fort 1 osteotomisi
sonrası maksiller sinüslerdeki anatomik ve morfolojik değişikliklerin KIBT
(Konik Işınlı Bilgisayarlı Tomografi) ile gösterilmesiydi.Gereç ve Yöntemler:Nisan 2015-Kasım 2017 tarihleri arasında
Le Fort I osteotomisi yapılan ve operasyon öncesi ile prosedürden 3 ile 12 ay
sonra KIBT taramaları mevcut olan 32 hasta çalışmaya dahil edildi. Planlanan
cerrahi girişim tipi her hastanın spesifik deformitesine bağlıydı. Ameliyat
öncesi ve sonrası sağ ve sol maksiller sinüs ventilasyon hacimlerinin
volumetrik analizler ile 3 boyutlu bir yazılım kullanılarak ölçümleri yapıldı.
Ayrıca maksillofasiyal deformite tipi ve septa varlığı her hasta için ayrı ayrı
kaydedildi. Her bir değişken için tanımlayıcı istatistikler hesaplandı ve
pre/postoperatif değerleri karşılaştırmak için eşleştirilmiş analizler
kullanıldı.Bulgular:32 olgunun (17 kadın, 15 erkek) verileri (yaş
ortalaması 26.40±7.54; ortalama takip süresi 5.25 ay) incelendi. Hastalar
çeşitli maksillofasiyal deformitelere sahipti (8 hasta sınıf II, 24 hasta sınıf
III). Operasyon öncesinde 27 hastada sağ veya sol maksiller sinüslerde septa
formasyonuna rastlandı. Postoperatif sol maksiller sinüs ventilasyon hacminde %
25.01; sağ maksiller sinüs ventilasyon hacminde % 18.01’lik bir azalma
saptandı. Ameliyat sonrası hem sağ, hem de sol maksiller sinüs ventilasyon
hacimlerindeki düşüş istatistiksel olarak anlamlıydı (p<0.05).Sonuçlar:Çalışma sonuçları Le Fort I osteotomilerinin sinüs
sağlığı üzerinde önemli bir etkiye sahip olduğuna işaret etmektedir. Bu
hastalarda maksiller sinüs enflamatuvar süreçlerinin postoperatif radyolojik
bulguları, hasta takibinde KIBT taramalarının rutin olarak kullanılmasının
yararlılığını göstermektedir. Anahtar Kelimeler:KIBT, ortognatik cerrahi, sinüs hacmi
Revo-S ve Lightspeed-LSX Döner Sistem Eğelerinin Aşırı Eğimli Kök Kanallarındaki Etkinliğinin Araştırılması / Analysis of Preparation Performance of Revo-S vs. Lightspeed-LSX on the Cross Sections of Severe Curved Root Canals
Authors: BOZKURT Durmuş Alperen , KEÇECİ Ayşe Diljin
Published: July 2020

Amaç: Aşırı eğimli kök kanallarında iki farklı döner sistem eğeleri ile kök kanalı şekillendirme etkinliğini karşılaştırmak.Gereç ve Yöntemler: Otuz adet aşırı eğimli (38.96±12.89) mandibular birinci molar dişler çalışmaya dâhil edildi. Eşit olarak iki gruba ayrılan dişlerin çalışma boyu ve kanal devamlılığı tespit edildi. Düşük hızlı testere yardımı ile dişlerin apikal, orta ve koronal seviyelerinden kesitler alındı. Şekillendirme sırasında Bramente ve ark. (1987) belirttiği gibi mufla sisteminden faydalanıldı. Kesitlerden dijital görüntüler şekillendirme öncesi ve sonrasında stereo mikroskop (x40) ile alındı. Mufla sistemine sırasıyla yerleştirilmiş olan kesitlerde Revo-S ve Lightspeed-LSX eğeleri ile apikal genişlik 40 olacak şekilde genişletildi. Merkezde kalma oranı, şekillendirilmiş alan, şekillendirilmemiş alan ve transportasyon dijital görüntülerin öncesi ve sonrasında üst üste monte edilerek ölçüldü. Bağımsız t testi, One-way ANOVA ve post-hok Tukey testi uygulanmıştır (P<0.05).Bulgular: Merkezde kalma oranı ortalama Revo-S 0,23±0,12 ve Lightspeed LSX için 0,13±0,08. Apikalde Revo-S (0.26 mm2) Lightspeed-LSX (0.15 mm2)’e göre dentin alanı kaldırması daha fazla olmuştur (P<0.05). Şekillendirilmemiş alanda Revo-S ve Lightspeed-LSX için istatistiksel olarak anlamlı farklılıklar gözlenmiştir: servikal (% 21.52 ve 7.28), orta (% 23.66 ve 6.00) ve apikal (% 17.68 ve 5.41) (P<0.05).Sonuçlar: Lightspeed LSX’ in Revo-S’ e göre daha merkezi kök kanalı şekillendirmesi yaptığı görülmüştür. Anahtar Kelimeler: bilgisayar-destekli görüntü analizi, kök kanalını hazırlama, mikroskopi
Development of an Artificial Intelligence System to Estimate Postoperative Discomfort After Impacted Third Molar Surgery
Authors: KOCYİGİT Seda , ÖZGÖNENEL Okan , BAŞ Burcu , OZDEN Bora , HOSGOR Hatice , AKBELEN KAYA Ozlem
Published: July 2020

Background: Artificial Neural Network (ANN) is relatively crude electronic model
based on the neural structure of human brain which was used in the field of
medicine in different purposes. It can be used for
many medical branches especially for estimating
the course of a certain disorder or treatment procedure. The aim of this
study is to use ANN in maxillofacial surgery to estimate the postoperative
symptoms after third molar surgery.Methods:The pre and post-operative information of 175 consecutive patients who needed extraction of impacted third
molar teeth were employed to train an ANN. After the training
process, the information of 26 cases was
used in order to verify the network's ability to predict the post-operative
symptoms such as swelling, pain, decrease
of mouth opening, bleeding, number of days
to return to normal activities and duration of activity restriction. The results obtained from ANN were compared with
the results of patients self-reported information. The correlation between the postoperative symptoms of the patients and
outcomes obtained from the ANN were analyzed statistically.Results: Close association was
found between the patients’ reports and ANN
results on post-operative pain, swelling, bleeding, number of days to return to normal
activities and duration of activity restriction.Conclusions: The proposed ANN approach is easy to
implement and adapted to predict the
response of the postoperative outcomes.
The model can be further extended to include more variables and experimental
data to increase reliability.Keywords:Activity restriction, artificial
neural network, postoperative discomfort, third molar surgery.