bluuebunny/crossref_metadata_2025 huggingface dataset:
Quality improvement of adaptive optics retinal images using conditional adversarial networks
Authors: Li Wanyue , Liu Guangxing , He Yi , Wang Jing , Kong Wen , Shi Guohua
Published: December 2019

The adaptive optics (AO) technique is widely used to compensate for ocular aberrations and improve imaging resolution. However, when affected by intraocular scatter, speckle noise, and other factors, the quality of the retinal image will be degraded. To effectively improve the image quality without increasing the imaging system’s complexity, the post-processing method of image deblurring is adopted. In this study, we proposed a conditional adversarial network-based method for directly learning an end-to-end mapping between blurry and restored AO retinal images. The proposed model was validated on synthetically generated AO retinal images and real retinal images. The restoration results of synthetic images were evaluated with the metrics of peak signal-to-noise ratio (PSNR), structural similarity (SSIM), perceptual distance, and error rate of cone counting. Moreover, the blind image quality index (BIQI) was used as the no-reference image quality assessment (NR-IQA) algorithm to evaluate the restoration results on real AO retinal images. The experimental results indicate that the images restored by the proposed method have sharper quality and higher signal-to-noise ratio (SNR) when compared with other state-of-the-art methods, which has great practical significance for clinical research and analysis.
Quantum nonlinear mixing of thermal photons to surpass the blackbody limit
Authors: Khandekar Chinmay , Yang Liping , Rodriguez Alejandro W. , Jacob Zubin
Published: December 2019

Nearly all thermal radiation phenomena involving materials with linear response can be accurately described via semi-classical theories of light. Here, we go beyond these traditional paradigms to study a nonlinear system that, as we show, requires quantum theory of damping. Specifically, we analyze thermal radiation from a resonant system containing a χ(2) nonlinear medium and supporting resonances at frequencies ω1 and ω2 ≈ 2ω1, where both resonators are driven only by intrinsic thermal fluctuations. Within our quantum formalism, we reveal new possibilities for shaping the thermal radiation. We show that the resonantly enhanced nonlinear interaction allows frequency-selective enhancement of thermal emission through upconversion, surpassing the well-known blackbody limits associated with linear media. Surprisingly, we also find that the emitted thermal light exhibits non-trivial statistics (g(2)(0) ≠ ~2) and biphoton intensity correlations (at two distinct frequencies). We highlight that these features can be observed in the near future by heating a properly designed nonlinear system, without the need for any external signal. Our work motivates new interdisciplinary inquiries combining the fields of nonlinear photonics, quantum optics and thermal science.
Effect of the second ring of antiresonant tubes in negative-curvature fibers
Authors: Wang Yuxi , Hasan Md Imran , Hassan Muhammad Rosdi Abu , Chang Wonkeun
Published: December 2019

We present a numerical investigation on the effect of introducing the second ring of antiresonant tubes on the guiding properties of the negative-curvature fiber. We determine the range of structural parameters for achieving the optimum light guidance in the double-ring geometry. Our study shows that the double-ring negative-curvature fiber can improve the confinement loss by up to four orders of magnitude with considerably better bending and single-mode performance when compared to its single-ring counterpart.
Tunable optical materials for multi-resonant plasmonics: from TiN to TiON [Invited]
Authors: Kharitonov Anton , Kharintsev Sergey
Published: December 2019

Alternative plasmonic materials are gaining more and more interest since they deliver a plethora of advantages in designing of optical metadevices. Among other alternatives, titanium nitride (TiN) has shown an exceptional combination of encouraging properties, such as CMOS- and bio-compatibility, high carrier concentration, tunability and outstanding robustness (high mechanical, chemical and temperature durability). Optical constants of TiN can be tuned at the synthesis stage. This allows for the adjustment of the spectral position of a plasmon resonance within the visible and near-infrared (NIR) range in order to match the desired working wavelength of a particular device. Together, these factors made TiN a popular material of choice in a diversity of recent plasmonic applications. Titanium oxynitride (TiON), which can be produced through the oxidation of TiN, have a great potential to build upon the success of TiN. Recently, it has been demonstrated that TiON thin films can exhibit a negative double-epsilon-near-zero (2ENZ) dielectric function. This unusual behavior of the permittivity opens up novel opportunities for the excitation of the plasmon resonance at several distinct frequencies within the visible and NIR region. Multi-resonant plasmonic components are beneficial for applications, where the enhanced light-matter interaction at multiple frequencies is demanded, such as nonlinear optics, up- and down-conversion, wavelength multiplexing and broadband absorption. This work begins with a brief survey of the recent progress in plasmonics made with TiN-based structures. Then we focus on TiON thin films with the 2ENZ behavior by discussing their potential in plasmonics. The experimental approaches useful for characterization of TiON thin films and the corresponding results are analyzed. These results are valuable for the development of 2ENZ plasmonic materials with large figure-of-merits in a diversity of applications. We believe that 2ENZ media is a powerful concept for multi-resonant plasmonics that will augment the functionalities and extend the operation bandwidth of plasmonic devices.
Autostereoscopic display with LCD for viewing a 3-D animation based on the moiré effect
Authors: Mori Shotaro , Bao Yue
Published: December 2019

Autostereoscopic displays based on the moiré effect in LCD have the advantage of being able to display 3D animations without reversed vision, but their practical use is greatly limited due to the low and fixed pixel density of the LCD. We propose a 3D display device with LCD, which resolves this issue by generating a periodic pattern with high resolution as the virtual intermediate image. The final image is obtained by selecting and rearranging specific pixels of this virtual image. Experiments reveal that 3D images with almost the same image quality and parallax as a printed matter with abundant pixels could be displayed.
Media ecology in the twenty-first century
Authors: McLuhan Eric
Published: December 2019

In this address, Eric McLuhan discusses the origins and importance of taking an ecological approach to studying media. In regard to the current media environment, he argues that the West is currently experiencing a new renaissance, and a new form of nomadism. The address concludes with a call for education geared towards active intervention in the media environment.
Media ecology classroom assignment: Comparative media paper
Authors: Caputo John S.
Published: December 2019

This essay discusses a foundational theory in media studies and uses an experiential approach to learning the concept. Based on the foundational writings of Sapir, Innes, McLuhan, Postman and others, the following is a two-part assignment that appears simple but can be quite complex. When looking at the cultural influence of media, we are often misled by the illusion of content. This assignment requires the student to examine how the form of a medium of communication influences the content. The student is asked to write a brief comparative analysis (two to four pages) of the same story in two different media, e.g., television news story and print journalism; a novel and a film; a blog and an audio story, etc. Again, students find this assignment quite difficult because now they are asked to show how the medium of communication being used actually changes the content.
How concepts of love can inform empathy and conciliation in intercultural community music contexts
Authors: Bartleet Brydie-Leigh
Published: December 2019

This article explores how concepts of love, in particular compassionate love, can provide a way of promoting empathy and conciliation in intercultural community music contexts. Drawing on the work of Deborah Bird Rose and bell hooks, it considers how love is first and foremost a verb, a participatory emotion and a social practice that can both inform and underpin efforts at building connections with others through music. The article then seeks to ask two thorny and critical questions that can arise when community musicians conceptualize their intercultural music-making through the lens of love. These questions point towards the oftentimes irreconcilable complexities, cultural politics and legacies of colonization that underpin peace-building and conciliation efforts. To illustrate and unpack these ideas, the article draws on stories and experiences of a ten-year intercultural music collaboration with Warumungu and Warlpiri musicians in Central Australia.
Making music in divided cities: Transforming the ethnoscape
Authors: Howell Gillian , Pruitt Lesley , Hassler Laura
Published: December 2019

In the phenomenon of the divided city – urban environments partitioned along ethno-religious lines as a result of war or conflict – projects seeking to bring segregated people together through community music activities face many operational and psychological obstacles. Divided cities are politically sustained, institutionally consolidated, and relentlessly territorialized by competing ethno-nationalist actors. They are highly resistant to peacebuilding efforts at the state level. This article uses an urban peacebuilding lens (peacebuilding reconceptualized at the urban scale that encompasses the spatial and social dimensions of ethno-nationalist division) to examine the work of community music projects in three divided cities. Through the examples of the Pavarotti Music Centre in Mostar, Bosnia-Herzegovina, the Mitrovica Rock School in Mitrovica, Kosovo, and Breaking Barriers (a pseudonym) in Belfast, Northern Ireland, we consider the context-specific practices and discourses that are deployed to navigate the local constraints on inter-communal cooperation, but that also contribute to the broader goal of building peace. We find that music-making is a promising strategy of peacebuilding at the urban scale, with both functional and symbolic contributions to make to the task of transforming an ethnoscape into a peacescape.
To bring peace that stays: Music, conflict and conciliation in the Gambia
Authors: McConnell Bonnie
Published: December 2019

In the Senegambia Region of West Africa, performers have long played a central role in conflict mediation. Historically, this has included both small-scale conflicts, such as those between neighbours, and larger-scale conflicts between groups. This article draws on evidence from ethnographic research with Gambian performers to explore contemporary perspectives on conflict and conciliation. I use analysis of three Mandinka-language songs relating to conflict within the family to show that performers work to promote conciliation through appeals to shared values of oneness, positive relationships and empathy. Examples include songs by hereditary professional musicians (jaloolu), a hip hop artist and female fertility society performers (kanyeleng). These songs are rooted in cultural frameworks of morality and goodness, while also reflecting gendered dynamics of risk and inequality.
Dominasi Guru Perempuan dalam Pendidikan Anak Usia Dini: Persepsi Stakeholder
Authors: Mukhlis Akhmad
Published: December 2019

This study aims to look at stakeholder perceptions women’s dominance and the lack of male participation as early childhood education teachers (PAUD). Research stakeholders consisted of the main stakeholders, teachers, and administrators of PAUD institutions and students' parents as supporting stakeholders. Although the most of research subjects did not reject male participation in PAUD, the findings of the study indicated that the most stakeholders considered women to have better competence than men in PAUD. Stakeholders also have a perception that men can participate in the development of physical-motor activities, arts, gender roles for male students and also filling leadership roles in PAUD institutions. To overcome the low participation of men in PAUD, it is hoped that government and university policies will be supported in developing male PAUD teacher candidates.
Pengembangan Media Box of Number Berbasis Tematik untuk Pembelajaran Matematika Permulaan Anak Usia 4-5 Tahun
Authors: Ulfah Maulidya , Nurhayati Eti , Abyati Hindun
Published: December 2019

Media plays to improve in achieving a learning goal because it can help teachers deliver learning material quickly. This research develops thematic-based box of number media that aims to introduce the beginning of mathematics to children aged 4-5 years so that it can delight children in learning. The resulting media include three themes, names of plants, myself, and the universe. This type of research used in this research is Research and Development (RnD). The results showed that the media box of number obtained an assessment from media experts with the criteria of feasible, namely the percentage of 92.5%, which previously earned 62.5%. Assessment by material experts get "decent" standards, with a percentage of 97.5% from 62.5% previously. While the results of the evaluation by users get the criteria "feasible" with a percentage of 95%. These results can be concluded that the thematic-based box of number media is suitable for beginning mathematics learning in children aged 4-5 years.
İşkolikliğin Örgütsel Bağlılık ve Performans Arasındaki İlişkide Aracı Rolü
Authors: KILINÇ Sebahattin , YENER Serdar
Published: December 2019

Örgütsel
bağlılığın işletmelerin sürdürülebilir rekabet avantajına olan olumlu etkisi iş
hayatında her geçen gün daha fazla kabul edilen bir gerçeklik olmaktadır.
Örgütsel bağlılığın olumlu sonuçlarının gözlemlendiği araştırmaların yanında
bazı araştırmalarda olumsuz sonuçları da gözlenmektedir. Örgütsel bağlılığın
olumsuz sonuçlarından bir tanesi olarak gözlenen işkoliklik davranışlar
çalışanların kendilerini sürekli çalışmaktan alıkoyamamasını ifade etmektedir.
Performans çalışanların örgütlerin amaçları doğrultusundaki olumlu çıktılarını
ifade etmektedir. İşkolikliğin performans üzerinde örgütsel davranışın olumlu
etkisinin azaltacağının öngörüldüğü araştırma modelinde veriler SPSS 21 ve
Process 3.0 kullanılarak analiz edilmiştir. Sinop ilinde faaliyet gösteren bir
işletmenin 155 çalışanı araştırma örneklemini oluşturmaktadır. Verilerin analiz
sonuçlarına göre işkolikliğin örgütsel davranış ve performans arasında kısmi
aracılık etkisi gözlenmiştir.
Kalite Yönetim Sistemi Belgesine Sahip Olma Durumunun İç Kontrol Sistemine Etkisi
Authors: KARA Murat
Published: December 2019

Kalite, günümüz
rekabet koşullarında yerel ve uluslararası pazarlarda üstünlük sağlamak isteyen
işletmelerin üzerinde durmaları gereken bir konudur. Kalite yönetim sistemi ise işletmelere pazar paylarını
büyütmede, işletmenin maliyetlerini azaltmada, riski daha etkili bir biçimde
yönetmede veya müşteri memnuniyetini artırmada yardımcı olmaktadır. Günümüzde
artan rekabetten dolayı işletmelerin yeniden yapılanmaları, örgütsel olarak
yenilenmeleri, varlıklarını korumaları, sermaye yapılarını güçlendirmeleri ve
olası muhtemel hataları ortadan kaldırmak için güvenilir ve doğru finansal
bilgilere ihtiyaçları attırmıştır. Bu çalışma ile kalite yönetim sistemi
belgesine danışman desteği eğitimleri ve kendi kalite yönetim ekibi eğitimleri
yoluyla sahip olan işletmelerin iç kontrolde ne kadar etkin olduğu araştırılmış
ve bu amaçla işletmelere anket çalışması yapılmıştır. Anket çalışması Malatya
ilinde faaliyette bulunan 95 işletmeye uygulanarak çalışmada kullanılacak
veriler elde edilmiştir. Yapılan analizler ile kalite yönetim sistemi belgesine
danışman desteği eğitimleri ve kendi kalite yönetim ekibi eğitimleri yoluyla
sahip olan işletmelerin iç kontrolün beş bileşeni arasındaki etkileşimi
incelenmiştir.
Kore Savaşı ve Savaşa Katılan Amasyalı Şehit ve Gaziler
Authors: ÖZCAN Selim
Published: December 2019

Kore Savaşı, II. Dünya savaşı sonrası
dönemde, soğuk savaşın sıcak mücadeleye dönüştüğü ilk çatışma alanıdır.
Türkiye’de savaşta, uluslararası barışı korumaya yönelik katkı sağmak amacıyla
çok uluslu askeri gücün içerisinde yer aldı. Türkiye’nin hemen her şehrinden
olduğu gibi Amasya’dan da savaşa katılan askerler oldu.

Bu çalışmayla, Amasya merkezde hayatta olan
gazilerin, yaşadıkları referans alınarak yaşananlardan sonuçlar çıkarıp geleceğin
yorumlanabilmesine katkı sağlamak amaçlandı. Nitel araştırma yönteminin, olgu
bilimi yaklaşımından yararlanılarak, sözlü tarih çalışması şeklinde gazilerle
mülakat yapılarak, anlatmaları kayıt altına alındı. 

Gazilerin bire bir yaşadıkları ve şahit oldukları
düşüncelerine yer verilerek, Amasya Gaziler Derneği ile Askerlik şubesinden
alınan verilerden de faydalanılarak kategoriler oluşturularak tablolarla
bulgular elde edildi. Sonuçta Türkiye’nin “NATO’ya” girişine katkı sağlandığı
gibi Türk Mehmetçiği, Kore’de bu günde Türk Milletine karşı duyulan sevgi ve
saygının temellerini atmış oldu.
Yabancı Dil Olarak Türkçe Öğrenen Öğrencilerin Kelime Öğrenme Stratejileri
Authors: EYÜP Bircan , DEMİREL Betül
Published: December 2019

Bu çalışmanın
amacı, yabancı dil olarak Türkçe öğrenen öğrencilerin kelime öğrenme
stratejilerini belirlemek ve kullandıkları kelime öğrenme stratejileri ile
cinsiyetleri, uyrukları ve yaşları arasındaki ilişkiyi tespit etmektir.
Araştırma tarama modeline uygun olarak desenlenmiştir. Araştırma grubunu
Karadeniz Teknik Üniversitesinin çeşitli fakültelerinde öğrenim gören 105
yabancı uyruklu öğrenci oluşturmaktadır. Öğrencilerin % 31.4’ü kadın, % 68.6’sı
erkek; % 61.9’u 18-23 yaş arası, % 38.9’u 24 yaş ve üzeri; % 49.5’i Asya, %
44.8’i Afrika ve % 5.7’si Avrupa uyrukludur. Araştırmada Kocaman ve Kızılkaya
Cumaoğlu (2014) tarafından 5’li likert tipinde geliştirilen ‘Yabancı Dilde
Kelime Öğrenme Stratejileri Ölçeği’ kullanılmıştır. Elde edilen veriler SPSS 16
paket programı kullanılarak analiz edilmiştir. Analiz sonucunda öğrencilerin en
çoktan en aza doğru kullandıkları kelime öğrenme stratejilerinin bellek
stratejileri (X= 23.82), duyuşsal stratejiler (X= 20.50), sosyal stratejiler (X=
19.20), bilişsel stratejiler (X= 14.29), üst-bilişsel stratejiler (X= 13.58), tamamlayıcı stratejiler (X= 12.32) olduğu tespit edilmiştir. Öğrencilerin kelime
öğrenme stratejileri ile cinsiyetleri, uyrukları ve yaş değişkenleri arasında
anlamlı bir fark olmadığı belirlenmiştir.
Gürün Ulu Camii
Authors: ŞANCI Fuat
Published: December 2019

Sivas’ın Gürün ilçesinde bulunan Gürün Ulu Camii’nin ilk inşası 15. yüzyılın üçüncü çeyreğinden önce olduğunu düşündüğümüz yapının ilk onarımı 1850 olup, bu onarımın tamamlanması ise 1922 tarihlerinde gerçekleştirilmiştir. Günümüze çeşitli değişikliklerle ulaşan yapı, ilk inşa şeklini kaybetmiş olmasına rağmen mevcut planı ve süslemeleri ile Türk sanatının belli bir döneminin önemli özelliklerini yansıtmaktadır. Yapının orijinal duvarlarında bulunan mazgal pencereler kitabede belirtildiği gibi, yapının aslında tonoz veya ahşap tavanlı ve dış kısmın toprak damlı olduğunu teyit etmektedir. Gürün Ulu Camii; son şekliyle merkezi planlı bir yapı olarak Türk İslam mimarisinde Karahanlılar’dan günümüze kadar küçük farklılıklarla uygulanmış bir cami planıyla karşımıza çıkmaktadır. Yapıda merkezi plan; ortada dört sütün tarafından taşınan kubbe, kubbeyi dört yandan destekleyen devirimli tonoz (yarım tekne tonoz) ve köşe boşluklarını örten aynalı tonozlar şeklinde uygulanmıştır. Yapının mihrap ve minberi Osmanlı batılılaşma dönemi üslubunun taşrada ki temsilcisi durumundadır. Mihrabın genelinde yüzeyler akant yapraklı konsollar, yastıklı başlıklar ve yatay silmelerle süslenerek; yivli sütunların dikey etkisi dengelenmeye çalışılmıştır. Bu uygulama Avrupa’daki Neo – klasik üslubun geometrik alanlara bölünmüş düzen anlayışının bir yansıması olarak değerlendirilebilir.
Aile İçi İletişimde Sosyal Medya: Karamanoğlu Mehmetbey Üniversitesi Öğrencileri Üzerine Bir Araştırma
Authors: DİLBER Fadime
Published: December 2019

Günümüzde teknolojinin
gelişmesine paralel olarak gelişen sosyal medya, hayatımızın vazgeçilmez bir
iletişim ortamı olmuştur. Toplumun en küçük temel taşı olan ailenin de sosyal medyadan
etkilenmemesi mümkün gözükmemektedir. Sosyal medyanın gençler tarafından yaygın
kullanımı, aile içinde yüz yüze iletişim kurma, aile bireylerine vakit ayırma, zamanı
faydalı kullanma, paylaşım, sosyal izolasyon ve çatışma gibi durumlara yol açtığını
söylemek mümkündür. Bu çalışmada
Karamanoğlu Mehmetbey Üniversitesi öğrencilerinden 425 öğrenciye ulaşılmıştır. Araştırmada
yüz yüze anket uygulaması yapılarak veriler elde edilmiştir. Üniversite öğrencilerine sosyal medya ve aile içi
iletişim ölçeği uygulanmıştır. Üniversite öğrencilerinin en çok kullandığı sosyal medya aracı
İnstagram olarak görülmektedir. Sosyal medyayı
eğlenme ve boş vakitleri değerlendirmek amacı kullandıklarını belirtmektedirler.
Sosyal medyanın ailede yüz yüze iletişimi engellediği, bireyleri
yalnızlaştırdığı, anne ve babaların çocukları ile çatışmasına neden olduğu, ailelerde
konuşmaya engel olduğu ve öğrencilerin eğlenceli zaman geçirdikleri ifadelerinde
anlamlı farklılıklar görülmüştür. Araştırmaya katılan öğrencilerin sosyal medya
kullanmanın, aile içi iletişimi olumsuz etkilediği görüşüne sahiptirler.
Kişiselleştirilmiş Öğretimin 5N1K Tekniğinde Başarıya Etkisi
Authors: ÇAKIR Özlem , METE Filiz , ERTAN KANTOS Züleyha
Published: December 2019

Bu çalışmada amaçlanan 1, 2. ve 3. sınıflarda Türkçe dersinde 5N1K
tekniği kullanılarak yapılan metin çözümlemesi ile aynı metnin kişiselleştirilerek
kullanılması arasındaki başarı farkının anlamlı olup olmadığını
belirleyebilmektir. Kişiselleştirilmiş öğretim, kişinin ilgi ve ihtiyaçları göz
önüne alınarak öğretim sürecinin kişiye göre uyarlanmasıdır. Kişiselleştirilmiş
öğretim materyali ise öğrencinin yakın çevresindeki kişi ve nesnelerin isimleri
kullanılarak geliştirilen sunum, alıştırma ve sınav materyali olarak
tanımlamaktadır. Çalışmada kullanılan metinler kişiselleştirilmiş ve
kişiselleştirilmemiş olarak iki farklı yapıda kullanılmıştır. Bu amaç
doğrultusunda 1., 2. ve 3. sınıfında öğrenim gören iki farklı gruptaki
öğrencilere öğretmen tarafından oluşturulmuş bir metin verilerek 5N1K soruları
oluşturmaları ve cevaplamaları istenmiştir. Deney grubuna metindeki şahıslar ve
nesneler kişiselleştirilerek verilirken, kontrol grubuna ise düz metinler
verilmiştir. Her iki metin için oluşturulan sorular ve cevaplar incelenerek
doğru-yanlış oranları belirlenmiştir. Uygulamalardaki başarı oranları
karşılaştırılarak sonuca ulaşılmıştır. Çalışma sonucunda, kişiselleştirilmiş
metin ile çalışan öğrencilerde başarı oranının kişiselleştirilmemiş metin ile
çalışan öğrencilerden daha yüksek olduğu belirlenmiştir.
Sendika İçi Demokrasi Üzerine Bir Karşılaştırma: İşçi Sendikaları ve Kamu Görevlileri Sendikaları
Authors: YENİHAN Bora , ÜN Çağla Burcu
Published: December 2019

Kısa bir ifadeyle,
üyelerinin hak ve çıkarlarını koruyarak, geliştirmeyi amaçlayan ve sürekliliği
olan örgütler olarak tanımlanan sendikalarla, eşitlik, özgürlük, insan hakları
gibi kavramlarla yakından ilişkili olan demokrasi arasında güçlü bir ilişki
bulunmaktadır. Sendikalar bir sivil toplum kuruluşu olmakla beraber, demokrasi
ile birlikte anıldıklarında, sendika içi demokrasi kavramı ön plana çıkmaktadır.  Bu çalışmada Tekirdağ ili ve ilçelerindeki
işçi sendikaları ile kamu görevlileri sendikaları, nitel araştırma
yöntemlerinden “yarı yapılandırılmış
mülakat tekniği” kullanılarak karşılaştırılmıştır. Her iki sendikal
oluşumdan üyelerle yapılan görüşmeler içerik analizine tabi tutulmuş ve sendika
içi demokrasinin uygulanması açısından bir farklılık olmamakla beraber, kamu
görevlileri sendikalarının üyelerinin sendika içi süreçler hakkında yeterli
bilgiye sahip olmadığı ve bu durumun sendika içi demokrasinin sağlıklı biçimde
işletilememesine yol açtığı sonucuna varılmıştır.
Justinianus Köprüsü Çevresinde Delgi Sondaj Yöntemli Paleocoğrafya-Jeoarkeoloji Araştırmalarının Ön Sonuçları
Authors: VARDAR Serdar , İLHAN Rifat , ÖNER Ertuğ , KENAR Fatih
Published: December 2019

Justinianus
köprüsü Sakarya kentinin batı kenarındaki Serdivan mahallesinde, Çarksuyu
deresi vadisinin güneye doğru genişleyen kesiminde bulunmaktadır. Bu çalışma
Çarksuyu deresi vadisi alüvyal dolgularının paleocoğrafya özelliklerini ortaya
koymak ve Antik Justinianus köprüsü üzerine jeoarkeolojik değerlendirmeler
yapmak amacıyla yapılmıştır. Araştırma alüvyon delgi sondaj yöntemine
dayanmaktadır. Batı-doğu doğrultusunda uzanan köprünün çevresinde 17 adet
sondaj gerçekleştirilmiştir. Paleocoğrafya ve Jeoarkeoloji değerlendirmeleri
saha gözlemlerinin yanında bu sondajların sediman örneklerinin tane boyutu,
kalsiyum, element, organik madde, pH, mikro fosil analizlerine dayanarak
yapılmıştır. Yapılan çalışmanın sonucunda, Çarksuyu deresi alüvyonları içinde 5
alüvyal birim (katman) tespit edilmiştir. Bunlar en alttan en üste doğru; etek
dolguları, eski taşkın düzlüğü sedimanları, ard bataklık-gölsel ortam
dolguları, akarsu taşkın sedimanları ve yüzey döküntüleridir. Ayrıca köprünün
sığ su-bataklık ortamında yapıldığı ve Sapanca gölünden doğan Çarksuyu
deresinin ince sedimanlarının bu gölsel ortamda birikmesi ile taşkın düzlüğünün
oluştuğu belirlenmiştir. Çalışmalar sırasında kuzeyden güneye akarsu akışını ve
Sakarya Irmağı’nın daha önce buradan aktığını yansıtan sedimantolojik verilere
ulaşılmamıştır.
Tamburî Cemil Beyin Hayatı, TRT Arşivindeki Saz Eserleri ve Kullandığı Makamlar
Authors: KAMİLOĞLU Ramazan , EFE Muhammed Hanefi
Published: December 2019

Bu çalışmada Tambur virtüözü olan Tamburi Cemil Bey'in hayatını inceleyerek 21 adet saz eseri ele alınmış, bu eserlerde makamları nasıl kullandığı açıklanmıştır. Tamburi Cemil Bey, Türk Müziğine kazandırdığı tambur çalım tekniği ve bestelediği eserler açısından çok önemli bir sazende ve bestekârdır. Bu çalışmanın amacı da böylesine büyük bir virtüözün saz eserlerini makamsal açıdan inceleyip hangi makamları kullandığını ortaya çıkararak Türk Müziğine katkıda bulunmaktır.
Periodic properties of pushdown automata
Authors: Ivanov Ilya E.
Published: December 2019

Finite automata transform periodic sequences into periodic ones. The period of the output sequence is bounded from above by a linear function of input period. It is known that pushdown automata also preserve the set of periodic sequences. We prove that the output period for one-counter pushdown automata is bounded from above by a quadratic function of input period. We also give an example of an automaton with a quadratic lower bound on output period.
Practices, attitudes and barriers faced by internists and pediatricians in transitioning young adult patients to adult medicine
Authors: Erspamer Kayla J. , Jacob Hannah , Hasan Reem
Published: December 2019

Purpose

To assess perspectives of clinicians at an academic medical center regarding current practices, barriers and possible interventions in transitioning young adult patients to adult care.

Methods

Electronic survey results from licensed independent providers in the Departments of Internal Medicine (n = 87) and Pediatrics (n = 49) were analyzed.

Results

The majority of providers at our institution are unaware of and do not follow national transition guidelines. Seventy-seven percent of pediatricians provide the majority of preparation and support in transition care of young adults with complex medical conditions without involvement of other interprofessional team members. Ninety-six percent of internists report not receiving formal training related to transition care and only 44% are comfortable caring for young adults with medical complexity. Eighty-eight percent of pediatricians and internists support a standard transition process, yet significant gaps in this process exist.

Conclusion

Despite the existence of national society-supported recommendations for transitions of care processes, lack of awareness among providers regarding national transition guidelines has led to uncertainty when it comes to managing the transition of young adult patients. There is lack of communication between pediatricians and internists, and internists are not as confident in caring for young adult patients. The scope of work of the interprofessional team is not utilized adequately. Providers agree on the importance of developing a standardized pediatric to adult transition process. These results help inform possible future interventions to improve care for this population.
Random uniform exponential attractor for stochastic non-autonomous reaction-diffusion equation with multiplicative noise in ℝ3
Authors: Han Zongfei , Zhou Shengfan
Published: December 2019

We first introduce the concept of the random uniform exponential attractor for a jointly continuous non-autonomous random dynamical system (NRDS) and give a theorem on the existence of the random uniform exponential attractor for a jointly continuous NRDS. Then we study the existence of the random uniform exponential attractor for reaction-diffusion equation with quasi-periodic external force and multiplicative noise in ℝ3.
L-fuzzy ideals and L-fuzzy subalgebras of Novikov algebras
Authors: Zhou Xin , Chen Liangyun , Chang Yuan
Published: December 2019

In this paper, we apply the concept of fuzzy sets to Novikov algebras, and introduce the concepts of L-fuzzy ideals and L-fuzzy subalgebras. We get a sufficient and neccessary condition such that an L-fuzzy subspace is an L-fuzzy ideal. Moreover, we show that the quotient algebra A/μ of the L-fuzzy ideal μ is isomorphic to the algebra A/Aμ of the non-fuzzy ideal Aμ. Finally, we discuss the algebraic properties of surjective homomorphic image and preimage of an L-fuzzy ideal.
L-topological-convex spaces generated by L-convex bases
Authors: Liao Chun-Yan , Wu Xiu-Yun
Published: December 2019

In this paper, axiomatic definitions of both L-convex bases and L-convex subbases are introduced and their relations with L-convex spaces are studied. Based on this, the notion of L-topological-convex space is introduced as a triple (X, 𝓣, 𝓒), where X is a nonempty set, 𝓒 is an L-convex structure on X and 𝓣 is an L-cotopology on X compatible with 𝓒. It can be characterized by many means.
MicroRNA-451b participates in coronary heart disease by targeting VEGFA
Authors: Lin Jie , Jiang Jun , Zhou Ruifang , Li Xiaojie , Ye Jun
Published: December 2019

Coronary artery disease (CAD) is one of the main causes of hospitalization worldwide and has high morbidity. MicroRNAs (miRNAs) play an important role in the pathogenesis of cardiovascular diseases. miR-451 is a special miRNA that is involved in many cancers’ development. At present, there is no research about miR-451 in coronary heart disease. In this study, we aimed to identify the action mechanism of miR-451 in coronary heart disease and human umbilical vein endothelial cells (HUVECs). In this study, we found that miR-451 is up-regulated in the peripheral blood of patients with coronary heart disease. Moreover, TargetScan and dual-luciferase reporter gene assay results showed that VEGFA is a direct target gene of miR-451. C (CCK-8) and flow cytometry assay results showed that miR-451 mimic significantly inhibits cell proliferation and promotes apoptosis in HUVECs. Moreover, we found that the role of miR-451 in HUVECs is associated with the PI3K-Akt-mTOR pathway. Taken together, the data indicates that miR-451 might be a novel bio-marker for coronary heart disease.
A combination therapy for Kawasaki disease with severe complications: a case report
Authors: Abe Yuriko , Ayusawa Mamoru , Kawamura Kengo , Yonezawa Ryuta , Kato Masataka , Komori Akiko , Kohira Ryutaro , Morioka Ichiro
Published: December 2019

Kawasaki disease (KD) is a form of acute multisystem vasculitis that presents with various complications, including coronary artery aneurysm. Heart failure and brain damage are rare, but life-threatening complications are associated with KD. Here, we describe a 4-year-old girl who developed intravenous immunoglobulin-resistant KD with both left ventricular failure and acute encephalopathy. On day 8 of the illness, the low left ventricular ejection fraction, mitral regurgitation, and low blood pressure, which required continuous administration of dobutamine, were observed during the treatments for KD, including intravenous immunoglobulin. She also appeared unconscious, where the electroencephalogram showed slow waves of activity in all regions of the brain. The cardiac performance improved after she received plasma exchange for three days. However, her unconsciousness with slow waves of activity on electroencephalogram and fever continued after the plasma exchange. Therefore, she was treated with methylprednisolone pulse, followed by prednisolone, as well as intravenous immunoglobulin. Finally, she recovered without any cardiac or neurological sequelae not only at the time she was discharged, but also throughout the follow-up period. The combination therapy using plasma exchange and methylprednisolone pulse may be a treatment option for severe KD with left ventricular failure and acute encephalopathy complications.
Vitamin E for prevention of biofilm-caused Healthcare-associated infections
Authors: Vergalito Franca , Pietrangelo Laura , Petronio Petronio Giulio , Colitto Federica , Alfio Cutuli Marco , Magnifico Irene , Venditti Noemi , Guerra Germano , Di Marco Roberto
Published: December 2019

The healthcare-associated infections (HCAIs) occur in patients both in nosocomial environments and in community. More often HCAIs are associated to the use of medical devices and bacterial biofilm development on these equipments. Due to the clinical and economic relevance of this topic, new strategies for the treatment of infections caused by biofilm proliferation are unceasingly searched by scientists.

The present study investigated the role of vitamin E to reduce the biofilm formation for a larger panel of human pathogens, including strains of Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Acinetobacter baumannii, Pseudomonas aeruginosa and Pseudomonas putida.

This potential activity was tested by placing a preparation of vitamin E (α-Tocopheryl acetate) as interface between the bacterial culture and the polystyrene walls of a 96 well plate at different concentrations of glucose, used as a biofilm enhancer.

The Staphylococcus genus was further investigated by spreading the vitamin E on a silicone catheter lumen and evaluating its influence on the bacterial colonization.

From our results, vitamin E has been able to interfere with bacterial biofilm and prevent in vitro biofilm formation. Furthermore, the ability of Staphylococcus aureus and Staphylococcus epidermidis to colonize the catheter surface decreased as a result of vitamin E application.
Differential diagnosis: retroperitoneal fibrosis and oncological diseases
Authors: Sica Antonello , Casale Beniamino , Spada Alessandro , Teresa Di Dato Maria , Sagnelli Caterina , Calogero Armando , Buonavolontà Pietro , Salzano Anna , Martinelli Erika , Saracco Elisabetta , Troiani Teresa , Anna Dodaro Concetta , Tammaro Dario , Luisa De Rimini Maria , Ciardiello Fortunato , Papa Alfonso
Published: December 2019

Retroperitoneal fibrosis is a connective disease of the auto-inflammatory/auto-immune type of the retroperitoneum with unknown etiology and pathological mechanism. The manifestations of the pathology can be local or systemic. Amongst the local symptoms, the dull and constant pain in the hips, back or abdomen is the most frequent.

We report here a case of a 47-year-old woman, whose pathogenic mechanism could be related to an “IgG4-related disease” disorder as suggested by an increased serum level of this subclass of IgG and the positive immunohistochemistry.

The diagnosis is not easy, because this pathology generates masses; adenomegalies with retro peritoneal development, that makes it similar to lymphomas or metastases from ovarian tumors.
From Big Data to Learning Analytics for a personalized learning experience
Authors: Dipace Anna , Loperfido F. Feldia , Scarinci Alessia
Published: December 2019

This article describes Learning Analytics (LA) as a predictive and formative approach that enables the planning of educational scenarios in line with students’ needs and languages in order to set a priori and in progress systems of control and inspection of the following: consistency, relevance and effectiveness of training objectives, curriculum paths, students’ needs and learning outcomes. Thanks to LA, it is possible to understand how students learn. Training courses are designed to include the definition of those learning outcomes that respond effectively to students’ needs in terms of contents, methodologies, tools and teaching resources. The present article aims to describe and discuss, after reviewing the relevant literature, in what way LA represents a valid support not only in designing student-centred training courses, which assess outcomes, but also in carrying out a formative assessment considering the learning experience as a whole. The analysis of some case studies was a good opportunity to reflect and define the bridge existing between the use of LA for assessment purposes and personalized learning paths.
Wikipedia in university courses: teaching practices and educational benefits
Authors: Petrucco Corrado
Published: December 2019

The academic world initially regarded Wikipedia with misgivings for a number of reasons, including the uncertainty concerning the reliability of its content, its anonymous authorship and the fact that students often use it as an easy way to cut and paste material for their coursework. In recent years, however, university instructors’ perception of Wikipedia has changed significantly: it is seen as a useful teaching resource, as well as a promising environment for learning and collaborative knowledge building. It can be used for teaching purposes by assigning students to create and edit encyclopaedia articles. Such assignments can have many benefits: in addition to improving students’ understanding of content, the assignments have been shown to increase their intrinsic motivation to learn, develop digital competences and build cross-cutting skills in online communication and interaction. Lastly, in connection with universities’ institutional role, editing Wikipedia can be an interesting channel for the public communication of science.
Digital classroom and students with learning disorders: a study to improve learning processes and teaching practices
Authors: Gaggioli Cristina
Published: December 2019

This study is an overview of the technologies used by students with learning disorder (LD) and has the purpose of investigating how and the conditions on which digital technology can be an integral part of a motivating and barrierless learning environment also for students with special educational needs. Classrooms of the 21st century could be equipped with a teacher’s PC, student devices, e-board, Internet connection and a full suite of technological equipment, content, software and applications specially designed for education. The aim of this research was to observe whether the didactic work carried out in digital classrooms is beneficial to students with LD. By comparing data from the quantitative analysis and the observations carried out in the classroom, it is possible to affirm that the introduction of technologies in the classroom provides the benefits described by international works on this topic.
A note on the fast direct method for discrete elliptic problems
Authors: Goreinov Sergei A.
Published: December 2019

We consider a method due to P. Vassilevski and Yu. A. Kuznetsov [4, 10] for solving linear systems with matrices of low Kronecker rank such that all factors in Kronecker products are banded. Most important examples of such matrices arise from discretized div K grad operator with diffusion term k1(x)k2(y)k3(z). Several practical issues are addressed: an MPI implementation with distribution of data along processor grid inheriting Cartesian 3D structure of discretized problem; implicit deflation of the known nullspace of the system matrix; links with two-grid framework of multigrid algorithm which allow one to remove the requirement of Kronecker structure in one or two of axes. Numerical experiments show the efficiency of 3D data distribution having the scalability analogous to (structured) HYPRE solvers yet the absolute timings being an order of magnitude lower, on the range from 10 to 104 cores.
Simulation of a random field with given distribution of one-dimensional integral
Authors: Kablukova Evgeniya G. , Mikhailov Guennady A. , Ogorodnikov Vasily A. , Prigarin Sergei M.
Published: December 2019

The problem of constructing a numerically realizable model of a three-dimensional homogeneous random field in a layer 0 < z < H with given one-dimensional distribution and correlation function of the integral over coordinate z is solved. The gamma distribution with shape parameter ν and scale parameter θ is used in the work. An aggregate of n independent elementary horizontal layers of thickness h = H/n vertically shifted by a random value uniformly distributed in the interval (0, h) is considered as a basic model. For each elementary random field, the normalized correlation function of the corresponding integral over z coincides with the given one, the gamma distribution with parameters depending on the number of horizontal layers is used as a one-dimensional distribution. It is proved that for the constructed model the normalized correlation function of the integral over z coincides with the given normalized ‘horizontal’ correlation function, and the parameters of the one-dimensional distribution asymptotically converge to given values for n → + ∞, but the corresponding mathematical expectation and variance coincide exactly with given values. To extend the class of possible models, an additional randomization of the basic model is considered. In the conclusion the results of computations for a realistic version of the problem are presented.
A new algorithm for numerical modelling of impurity transport in the frame of statistically homogeneous sharply contrasting media
Authors: Kondratenko Petr S. , Matveev Leonid V. , Vasiliev Alexander D.
Published: December 2019

A new method is developed to calculate characteristics of contaminant transport (including non-classical regimes) in statistically homogeneous sharply contrasting media. A transport integro-differential equation in the space-time representation is formulated on the basis of the model earlier proposed by one of the authors (L. M.). Analytical expressions for transport characteristics in limiting time intervals in the one-dimensional case are derived. An interpolation form is proposed for the integral kernel of the transport equation. On a basis of this expression, an algorithm is developed for numerical modelling the contaminant transport in statistically homogeneous sharply contrasting media. Trial numerical 1D calculations are performed based on this algorithm. Good agreement was found between the numerical simulation results and the asymptotic analytical expressions.
Approximate spectral models of random processes with periodic properties
Authors: Medvyatskaya Alisa M. , Ogorodnikov Vasily A.
Published: December 2019

We consider approaches to simulation of periodically correlated random processes based on the nonstandard spectral representation of the process with parameters periodically varying in time and also on spectral representations using the vector stationary Gaussian processes.
Granulometric properties of particles in Upper Miocene sandstones from thin sections, Szolnok Formation, Hungary
Authors: Király Csilla , Falus György , Gresina Fruzsina , Jakab Gergely , Szalai Zoltán , Varga György
Published: December 2019

Particle size and shape are among the most important properties of sedimentary deposits. Objective and robust determination of granulometric features of sediments is a challenging problem, and has been standingin the focal point of sedimentary studies for many decades. In this study, we provide an overview of a new analytical approach to characterize particles from thin sections of sandstones by using 2D automated optical static image analysis. The analysed samples are originated from the turbiditic Lower Pannonian (Upper Miocene) sediments of Szolnok Formation. Sandstone samples were analysed from 1,500 to 2,250 m depth range. According to the previous studies: the detrital components are quartz, muscovite, dolomite, K-feldspar and plagioclase. Diagenetic minerals are mostly carbonates (calcite, Fe-dolomite, ankerite, siderite), clay minerals (illite, kaolinite), ankerite, siderite and kaolinite. As the discussed Szolnok Formation is considered as a potential CO2 storage system (to reduce atmospheric CO2 concentration), special attention has to be paid on grain size and shape alteration evaluation, since pore water-rock interactions affected by CO2 injection may cause changes in particle properties.
The primarily aim of the present study was to develop a method for effective characterization of the particle size and shape of sandstones from thin sections. We have applied a Malvern Morphologi G3SE-ID automated optical static image analyser device, what is completed with a Raman spectrometer. Via the combined analysis of granulometry and chemical characterization, it was obvious that there were specific relationships among various grain shape parameters (e.g., circularity values correlate to width and length ratios, as well as to convexity) and the results indicated that based simply on particle shapes, muscovites can be effectively separated from other minerals. Quartz and feldspar grains showed the highest variability in shapes as these are detrital ones, and sometimes arrived as lithic fragments from which other parts were dissolved The size and shape of carbonate minerals depends highly on the original pore size and shape because these minerals are mainly diagenetic. The shape of detrital dolomites depends on diagenetic ankerite, as it replaces the rim of dolomites.
Assessment of a Split Homing Based Gene Drive for Efficient Knockout of Multiple Genes
Authors: Kandul Nikolay P , Liu Junru , Buchman Anna , Gantz Valentino M , Bier Ethan , Akbari Omar S
Published: December 2019

Homing based gene drives (HGD) possess the potential to spread linked cargo genes into natural populations and are poised to revolutionize population control of animals. Given that host encoded genes have been identified that are important for pathogen transmission, targeting these genes using guide RNAs as cargo genes linked to drives may provide a robust method to prevent disease transmission. However, effectiveness of the inclusion of additional guide RNAs that target separate genes has not been thoroughly explored. To test this approach, we generated a split-HGD in Drosophila melanogaster that encoded a drive linked effector consisting of a second gRNA engineered to target a separate host-encoded gene, which we term a gRNA-mediated effector (GME). This design enabled us to assess homing and knockout efficiencies of two target genes simultaneously, and also explore the timing and tissue specificity of Cas9 expression on cleavage/homing rates. We demonstrate that inclusion of a GME can result in high efficiency of disruption of both genes during super-Mendelian propagation of split-HGD. Furthermore, both genes were knocked out one generation earlier than expected indicating the robust somatic expression of Cas9 driven by Drosophila germline-limited promoters. We also assess the efficiency of ‘shadow drive’ generated by maternally deposited Cas9 protein and accumulation of drive-induced resistance alleles along multiple generations, and discuss design principles of HGD that could mitigate the accumulation of resistance alleles while incorporating a GME.