bluuebunny/crossref_metadata_2025 huggingface dataset:
ПОВЫШЕНИЕ ИКТ-КОМПЕТЕНТНОСТИ РАБОТНИКОВ ОБРАЗОВАНИЯ КАК ПЕДАГОГИЧЕСКАЯ ПРОБЛЕМА
Authors: Gitman Elena Konstantinovna , Tokhtueva Tatiana Valerevna
Published: March 2019

Цель. Статья посвящена актуальной проблеме подготовки высоко квалифицированных кадров, способных включать в образовательный процесс новые информационные технологии. Предметом анализа выступает готовность работников образования к повышению уровня ИКТ-компетентности. Авторы ставят своей целью выявить уровень ИКТ-компетентности педагогов разных возрастных категорий.Методология проведения работы. В основу исследования положены общетеоретические и эмпирические методы – сравнительный анализ и обобщения, наблюдение, анкетирование, эксперимент.Результаты. Авторами представлен анализ результатов констатирующего эксперимента. Авторы делают вывод о наличии проблемы неоднородности уровня владения ИКТ-компетентностью у педагогов разных поколений, поэтому возникает вопрос о необходимости выравнивания компетентностного фона работников образования.Область применения результатов. Результаты исследования выявляют необходимость качественного подхода к проблеме повышения ИКТ-компетентности современного педагога. Необходимы новые идеи в системе регулярной подготовки и переподготовки в сфере применения информационно-коммуникационных технологий в педагогической деятельности.
ОРГАНИЗАЦИЯ НАУЧНО-ИССЛЕДОВАТЕЛЬСКОЙ РАБОТЫ СТУДЕНТОВ В РАМКАХ УЧЕБНОГО ПРОЦЕССА ТЕХНИЧЕСКОГО ВУЗА (1960-1970 ГГ.): ДИДАКТИЧЕСКИЙ АСПЕКТ
Authors: Zhdanova Tatyana Arkadyevna
Published: March 2019

Предметом исследования статьи являются многообразие форм проведения научно-исследовательской работы студентов в учебном процессе технических вузов 60–70 годов прошлого столетия.Целью работы провести анализ условий и способов организации научно-исследовательской работы студентов технических вузов в 60–70-е годы прошлого века и выделить ее дидактические возможности.В работе использованы научные методы: реконструкции, анализа исторического материала, а также обозначены социальные предпосылки и методология проведения научно-исследовательской работы студентов в технических вузах СССР.Результат работы представлено научное обоснование научно-исследовательской работы студентов как ведущей формы организации образовательного процесса в вузах для повышения качества подготовки специалистов.
ВЗАИМОСВЯЗЬ АГРЕССИВНОСТИ И ЦЕННОСТНО-МОТИВАЦИОННЫХ ХАРАКТЕРИСТИК ЛИЧНОСТИ В СВЯЗИ С ИНВАЛИДНОСТЬЮ ПО ЗРЕНИЮ
Authors: Krasnov Aleksey Vitalyevich , Bashirova Elvira Eduardovna
Published: March 2019

Цель. Изучить взаимосвязь агрессивности с ценностно-мотивационными характеристиками у лиц с инвалидностью по зрению в связи со временем наступления инвалидности.Методы или методология проведения работы. В исследовании принял участие 61 инвалид по зрению, 32 человека с врожденной инвалидностью и 29 – с приобретенной. Методы диагностики – «опросник Басса-Дарки», опросник М. Рокича «Ценностные ориентации», методика Е.Б. Фанталовой «Уровень соотношения «ценности» и «доступности» в различных жизненных сферах». Собранные данные обрабатывались с помощью коэффициента ранговой корреляции Спирмена и U-критерий Манна-Уитни.Результаты. Лица с врожденной инвалидностью по зрению обладают более низкими показателями агрессивности, чем лица с приобретенной инвалидностью. Для лиц с врожденной инвалидностью по зрению более значимы ценности, центрированные на самореализации, тогда как для лиц с приобретенной инвалидностью – центрированные на приспособлении к группе. Каждая из исследуемых групп обладает специфическими корреляционными взаимосвязями показателей агрессивности и уровня дезинтеграции ценностно-мотивационной сферы.Область применения результатов. Результаты исследования могут быть применены в практике психологического консультирования, будут иметь практическую значимость для специалистов, работающих с инвалидами по зрению.
As contribuições brasileiras sobre conflitos armados dentro do campo das Relações Internacionais (2007-2017)
Authors: Souza Matheus De Abreu Costa
Published: March 2019

Desde a criação do campo das Relações Internacionais, a produção acadêmica tem dado certo enfoque nos desafios concernentes à manutenção da paz e da segurança internacional. Dentro do subcampo da segurança internacional, o estudo sobre conflitos armados é um tópico amplamente discutido. Assim, o presente artigo tem como objetivo explorar as contribuições acadêmicas brasileiras sobre a temática, publicadas nos anais eletrônicos dos eventos da Associação Brasileira de Relações Internacionais (ABRI), entre os anos de 2007 e 2017, visando identificar em qual direção os artigos produzidos nesse período contribuem para com os estudos sobre conflitos armados
CIDADE SUBVERSIVA: O RIO DE JANEIRO EM PLANOS E FUGAS
Authors: Ramalho Laís De Oliveira
Published: March 2019

Em um mundo que, pouco a pouco, é dominado pela urbanização, observar a realidade citadina significa analisar de perto a vida da maior parte dos habitantes do planeta. Nas Relações Internacionais, este movimento é compatível com o que Matt Davies chama de “encontrar o internacional no everyday” (2016, p.2), isto é, entender como as rotinas que consideramos tão simplesmente cotidianas estão impregnadas por fenômenos globais. Sendo a desigualdade um dos fenômenos mais marcantes da vida urbana no Sul Global, este artigo busca investigar como diferentes classes socioeconômicas interagem com a cidade. Como fonte de trabalho, moradia ou lazer, o tecido plástico da cidade parece sempre se moldar para garantir mais uma possibilidade àqueles que estão dispostos a explorá-lo de forma subversiva em práticas que desafiam noções e binários (que se pretendem) estáticos como público-privado e formal-informal.
Research Roundup
Authors: Heggs Karen
Published: March 2019

Synopses of a selection of recently published research articles of relevance to palliative care
Politics and palliative care: Eswatini
Authors: Smyth Dion
Published: March 2019

Dion Smyth's review of palliative nursing on the internet
Research roundup: March 2019
Authors: Odd Dawn , Seal Joanne
Published: March 2019

In this section, a range of brief synopses of recently published articles that may be of interest to health visitors is presented. The aim of this roundup is to provide an overview, rather than a detailed summary, of the research papers selected. Should you wish to look at any of the papers in more detail, a full reference is provided.
Are you a superhero or a pilot?
Authors: Forbes Lisa
Published: March 2019

Practice development can come from a variety of sources, sometimes unexpectedly, says Lisa Forbes
The ‘invisible’ health visitor
Authors: Hanley Jane
Published: March 2019

As experts with many years of education and training, health visitors are doing wonderful things in their communities – but their voices are often absent from discussions in the media about child and family health. Are cuts in services to blame?
Isolated Vertical Ophtalmoplegia and Mydriasis Due to Bilateral Midbrain Infarction
Authors: Budak F. , Aydin E. , Kockaya A. , Ozkara B.
Published: March 2019

Partial fascicular oculomotor palsy, the combination of bilateral midriasis with loss of vertical gaze movements, is rarely a consequence of midbrain infarction. We describe a patient with acute ischemic infarcts involving both upper most part of the midbrain, presenting with marked vertical gaze palsy and mydriasis bilaterally as the only neurological abnormality. These features are suggestive of partial fascicular oculomotor palsies involving the pupil, inferior rectus(IR), superior rectus(SR), inferior oblique(IO) muscles and sparing medial rectus(ML), levator palpebrae(LP) muscles. These neuro-ophthalmological and radiological findings in our case support the model that the fibers to medial rectus and levator palpebrae muscles might be located in the more caudal portion of the oculomotor fascicles.
OSAS-Related Cognitive Impairment after First-Ever Stroke: Study Design and Methodology
Authors: Calabrò Rocco Salvatore , Gervasi Giuseppe , Aricò Irene , De Luca Rosaria , Manuli Alfredo , Silvestri Rosalia , Casella Carmela , Bramanti Placido
Published: March 2019

Introduction: Obstructive Sleep Apnea Syndrome (OSAS) is considered an emerging risk factor for cerebrovascular disease. Both the two conditions could share the same neurocognitive impairment, which, in the early phase of OSAS, are reversible and mediated by the excessive daytime sleepiness. Treatment with continuous positive air pressure (CPAP) device could improve the neurocognitive functions, and therefore, it could be considered as a valid treatment option in stroke patients affected by OSAS and neurocognitive impairment.
Materials and Methods: Patients affected by unilateral ischemic stroke will be subdivided into two groups, according to the presence or absence of OSAS. All participants will be evaluated by using a specific neuropsychological battery exploring attention, memory, praxic abilities and executive functions. Patients presented with a moderate to severe OSAS will be treated with CPAP and followed for at least 1 year.
Results: The data analysis requires a sample size of 550 to provide adequate power of the study. The outcome variable is the score of specific neuropsychological and quality of life tests at baseline, after 6 months and at 1 year follow-up.
Discussion and Conclusion: This study design presents three specific analysis limitations. First, several other sleep disorders can produce drowsiness beyond OSAS. Second, the neurocognitive impairment in stroke patients is difficult to assess. Third, OSAS patients are often intolerant to diagnostic tests requiring an excessive length.
However, the findings coming from the protocol may have important implications about the effect of sleep disorders on cognitive function in stroke patients. Moreover, the easy employed procedures could be translated into clinical practice to improve the quality of life of patients affected by both OSAS and stroke.
A Preliminary Report on the Aerophytic Cyanoprokaryota and Algae from the Great Smoky Mountains National Park, USA
Authors: Smith Thomas , Rollins Adam , Stephenson Steven L.
Published: March 2019

An annotated list is provided for 38 species of aerophytic algae (31 cyanobacteria, six Chlorophyta, and one Bacillariophyta) that were recovered from eight soil study sites (in coniferous and hardwood forests) collected during surveys carried out in the Great Smoky Mountains National Park (GSMNP) in August 2010. The cyanobacterium Leptolyngbya foveolarum was the single most frequently encountered species recovered from all eight study areas. Most species (68% of the total) were found at only one or two sampling sites. There were 32 new species records in the GSMNP.
The Effect of Dentin Desensitizer and Nd: YAG Laser Pre-Treatment on Bond Strength of Ceramic Restoration Cemented with Two Self Adhesive Cements
Authors: Küçükekenci Ahmet Serkan , Küçükekenci Funda Fundaoglu
Published: March 2019

Objectives: This in-vitro study evaluated the effects of desensitizing treatments on the shear bond strength (SBS) of ceramic restoration cemented with two different self-adhesive resin cements (SARC). Materials and Methods: Sixty human molars’ occlusal surfaces were ground to expose dentin; and were randomly grouped as (n=10); Group CU: no surface treatment (control) and applied Rely X U200 SARC, Group CP: no surface treatment (control) and applied Panavia SA SARC, Group TU: treated with Teethmate and applied Rely X U200 SARC, Group TP: treated with Teethmate and applied Panavia SA SARC, Group LU: treated with Nd:YAG laser and applied Rely X U200 SARC, Group LP: treated with Nd:YAG laser and applied Panavia SA SARC. Then, lithium-disilicate ceramics (IPS e.max CAD Ivoclar Vivadent: n= 60; 5 mm in diameter; 2 mm in height) were cemented. SBS test was performed and the data were statically analyzed (?=0.05). Failure modes were determined with stereomicroscope. Results: Nd: YAG laser treatment groups showed significantly different SBS values than the control groups (p<0.05). However, there were no significant differences between TMD treatment groups and other groups (p>0.05). Multiple comparisons showed that no statically significant difference found between the SBS values of all groups (p>0.05). Group CP showed the lowest SBS value (14.97 MPa) and Group TU showed the highest SBS value (20.82 MPa) among all experimental groups. The overall failure types for specimens were “mixed” and“ adhesive”. Conclusions: Teethmate desensitizer and Nd:YAG laser pre-treatment increase the SBS of ceramic restoration cemented with two self adhesive cements.
Healing of a Large Periapical Lesion and Adjacent Cortical Bone: Cone-Beam CT Aided Diagnosis and Treatment
Authors: Gulsahi Kamran
Published: March 2019

The primary aim of root canal treatment is the resolution of clinical symptoms and radiographic signs. Periapical lesion is a crucial problem resulting in the loss of teeth. The major reason of periapical lesion associated with infected pulpal tissue are caused by pulpal inflammation and/or degeneration through deep caries, trauma, or by a combination of these parameters. Periapical lesion in teeth with root canal treatment should be initially treated with nonsurgical retreatment procedures. Small volume Cone Beam CT can be a powerful tool in endodontic diagnosis, treatment planning and follow-up. This case report presents a complete clinical and radiological healing of a large periapical lesion and adjacent cortical bone of a hopeless tooth after retreatment procedures.
Flexural Strength and Fracture Resistance of Leucite-Reinforced Glass Ceramic for Dental CAD/CAM
Authors: Hurbag Meryem , Nalbant Asude Dilek , Tokar Emre
Published: March 2019

Statement of the Problem: Leucite-reinforced CAD/CAM ceramics are aesthetic restorative materials with a very close value of translucency, fluorescence and opalescence to natural teeth, however their flexural strength and fractural resistance values should be evaluated. The purpose of this systematic review was to analyze the fracture resistance and flexural strength values of leucite-reinforced CAD/CAM ceramic materials among the literatures published between 2008 and May 2018. Materials and Methods: An electronic research for articles in English-language, published between 2008 and May 2018 was performed with the help of PubMed search engine. The keywords used were IPS Empress CAD, Rosetta BM, flexural strength, fracture resistance. After applying the predetermined inclusion criteria; the definitive list of selected articles was suitable only for analyzing the flexural strength and fracture resistance values of leucite reinforced CAD/CAM ceramics. Literatures evaluating other ceramics and other criteria such as ‘fatigue resistance’ and ‘optical properties’ were excluded. Results: The systematic application of inclusion criteria resulted in 18 literatures that analyzed the fractural resistance and flexural strength of leucite-reinforced CAD/CAM restorative material. 17 literatures conducted researches about IPS Empress CAD ceramic and 1 was about Rosetta BM ceramic, since it is a new ceramic. Conclusion: For IPS Empress CAD restorative material, the literatures scanned indicated superior aesthetic properties however limited success rate at flexural strength and fractural resistance, especially when compared with IPS E.max CAD restorative material which is more recommended for posterior restorations. For Rosetta BM ceramic; only one literature was found; which reported that Rosetta BM ceramic showed better fracture and strength values when compared to IPS Empress CAD ceramic. However more investigations are needed to be done for both materials in order to develop leucite-reinforced CAD/CAM materials usage; especially in the posterior regions.
Drug-influenced Gingival Enlargement: Overview of the Clinical Features and Assessment Methods
Authors: Sabarudin Muhammad Annurdin , Taib Haslina
Published: March 2019

Drug-influenced gingival enlargement is an unwanted effect of the gingiva affecting patients’ aesthetic as well as oral hygiene procedures. The presentation of the enlargement may range from mild to severe by which the chewing function could also be affected. Patients usually were not aware of this condition until they feel discomfort, thus seek for treatment. This review will discuss the overview of common drugs that influence gingival enlargement, its clinical features, previous and current methods of assessment to determine the severity of the gingival enlargement. The review will serve as a guide for clinician in making diagnosis and treatment plan of such condition.
Fracture Properties and Toughening Mechanisms of Biodegradable Poly(L-lactic acid)/Poly(e-caprolactone) Polymer Blend
Authors: Todo Mitsugu
Published: March 2019

PLLA/PCL polymer blends with different PCL contents were fabricated to examine the effect of PCL content on the bending mechanical properties of the blend. Three-point bending tests of beam specimens 5 mm thick were performed at both quasi-static and impact loading-rates, and then bending mechanical properties such as bending modulus, strength and fracture absorbed energy were evaluated. It was found that the modulus and strength decreased as PCL content increased, while the fracture absorbed energy tended to increase with increase of PCL content and was optimized with 15% PCL. Scanning electron microscopy of fracture surfaces and polarizing optical microscopy of tensile damage regions were also carried out to investigate the fracture mechanism of PLLA/PCL blend. It was found that the primary mechanisms involved in the bending fracture of PLLA/PCL blend were initiation of dense craze-like damage and following ductile deformation of the matrix. The model I fracture properties of PLLA/PCL were also evaluated and compared with those of pure PLLA. It was found that the fracture properties were dramatically improved by PCL blending and the primary toughening mechanisms were the aggregation formation of craze-like micro-damages in the process-zone with rough formation of fracture surface.
A Meta-Individual Account of Personality Studies
Authors: Dorfman Leonid , Barashkova Elena
Published: March 2019

A meta-individual account of personality studies is shown as a kind of dual-system models. Numerous dual-system models in cognitive, personality, and social psychology have received attention. In the above list, the meta-individual world theory would also be worth noting. What is the notion of the meta-individual world? The term ‘meta’ has both epistemic and ontological meanings. On the epistemic view, the meta-individual systems approach assumes a generic model of some portion of reality supplemented with partial confluence theories. It is a kind of meta-theoretical principles, which explicitly or implicitly guide empirical research. On the ontological view, the meta-individual world conceives of a personality extension in a larger system, namely, both the personality itself and its reach beyond its body, extending to a closer social setting. Two principles lie at the core of the meta-individual world theory: duality and complementarity. They lead to a structuralist account which opens multi-dimensionality of personality.
1 An earlier version of this paper was presented at the 2nd International conference “Science, Technology, and Art Relations – STAR” (Tel Aviv, Israel, 19?21 November 2014). A longer version of this paper has appeared in the URL: http://engineers.org.il/_Uploads/12583STAR2-Papers Abstracts.-pdf, (pp. 65-80). [1].
TLC profiling and antioxidant activity of phenolic compound from Sterculia oblongata bark extract
Authors: MURNINGSIH TRI , PRAPTIWI PRAPTIWI , LIANA LIANA , FATHONI AHMAD
Published: March 2019

Abstract. Murningsih T, Praptiwi, Liana, Fathoni A. 2019. TLC profiling and antioxidant activity of phenolic compound from Sterculia oblongata bark extract. Nusantara Bioscience 11: 44-48. In the present study, we investigated the total phenolic content and in- vitro antioxidant activity of Sterculia oblongata. Total phenolic content (TPC) of the methanol extract was examined by Folin-Ciocalteu reagent and gallic acid as standard. The in-vitro antioxidant activity was performed by DPPH free radical scavenging activity and β-carotene bleaching assay. The result showed that the TPC of methanol extract was the highest (P<0.05) compared to other extracts. There is a positive and significantly very high Pearson’s correlation between antioxidant activity index (AAI) and TPC (r = 0.996). A negative and significantly high Pearson’s correlation was obtained between IC50 value and TPC (r = -0.885). The result of β-carotene bleaching assay showed that the rate of the decreased antioxidant activity of S.oblongata extract was lower than that of β-carotene/linoleic acid. The results suggest that the extract of S. oblongata can be used as a natural antioxidant. However, further investigation to isolate and identify the chemical compounds responsible for antioxidant was needed
Proximate and calcium analysis of nixtamalized corn grits as a raw material of Gorontalo traditional meal, Indonesia
Authors: KADIR SUNARTO , AHMAD LISNA , BAIT YOYANDA
Published: March 2019

Abstract. Kadir S, Ahmad L, Bait Y. 2019. Proximate and calcium analysis of nixtamalized corn grits as a raw material of Gorontalo traditional meal, Indonesia. Nusantara Bioscience 11: 56-62. This study aims to find out the influence of additional lime concentration and the length of boiling time toward the proximate and calcium grits of corn (Zea mays L). The study was conducted using a randomized group factorial design of two factors. The first factor is calcium concentration consisted of three treatments; 0.5%, 1%, and 1.5%, and the second factor is the length of boiling time, consisting of two treatments; the 60-minute boiling time, and the 30-minute boiling time. The parameters of this study were water content, ash content, fat content, protein content, carbohydrate content, and calcium content. The ANOVA analysis reveals that the treatment of calcium concentration, and the length of boiling time insignificantly influence the water content, ash, protein, fat, carbohydrate, and calcium contents of nixtamal corn grits. Grits of nixtamal corn produced in this study has water content of 10.54-11.33%, ash content of 1.34-1.39%, protein content of 9.11-9.40%, fat content of 3.36-3.59%, carbohydrate content of 74.44-75.36%, and calcium content of 10.15-10.92%.
Diffuse Large B-Cell Lymphoma Mimicking an Ulcerative Colitis Flare
Authors: Mansour Ramy , Beattie Michael , Miller Justin , Haus Carolyn
Published: March 2019

We present a case of non-Hodgkin lymphoma of the rectum in a 41-year-old African American male with a 1 year history of ulcerative colitis and no previous immunomodulatory therapy. The patient presented with a 10-day history of hematochezia, for which endoscopy was performed with gross findings indicative of ulcerative colitis flare. Tissue biopsy, however, demonstrated significant lymphoid infiltrating regions with histologic findings suggestive of a diffuse large B-cell lymphoma. Non-Hodgkin's lymphoma accounts for less than 1% of all cases of colorectal cancer. Associated risk factors have been previously reported but, were absent in the patient’s history. This suggests the possibility of distinct genetic abnormalities inherent to the tumor and/or an underlying germline mutation inherent to the patient that may have contributed to the premature development of diffuse large B-cell lymphoma.
Sex sorting sperm of sumba ongole bulls by using snakehead fish (Channa striata) albumin extract
Authors: Maulana T. , Said S. , Arifiantini R. I. , Setiadi M. A.
Published: March 2019

The objective of this research was to investigate the potential of snakehead albumin extract (channalbumin) for sorting X and Y sperm of Sumba Ongole (SO) and its characteristic. Semen was collected from three SO bulls using artificial vagina and the freeze dried channalbumin was extracted from snakehead fish. Channalbumin column was made with different concentration ratio of top and bottom fraction: 2%:4%; 3%:5%; 4%:6% respectively and BSA 5%:10% as control. Semen was put in top fraction then incubated for 30 min at room temperature then each fraction was centrifuged at 1800 rpm for 10 minutes. The pellet was evaluated for motility, abnormality, viability, membrane integrity and head sperm morphometric. The results showed that the channalbumin capable to maintain sperm motility in the top fraction better than the bottom fraction. Sperm viability and membrane integrity in control group were significantly higher (P<0.05) than all channalbumin treatment. BSA 5%:10% has highest proportion of X and Y sperm (69%:76.77%) compared with 2%:4% (42.33%:79.13%), 3%:5% (55.97%:75.73%) and 4%:6% of channalbumin (62.77%:68%). It’s concluded that channalbumin 4%: 6% was effective for separation of XY sperm with higher proportion.
Wacana “Kerajaan Majapahit Bali”: Dinamika Puri Dalam Pusaran Politik Identitas Kontemporer
Authors: Suwitha I. Putu Gede
Published: March 2019

This study discusses the transformation of the identity of the contemporary Balinese community in general and the dynamics of palaces (puri) in the political rotation in particular based on the discursive development of the “Bali Majapahit Kingdom”. This discourse can be observed from the local newspapers in Bali such as Bali Post, Tokoh, and so forth. The discourse of the “Bali Majapahit Kingdom” inspired by the Majapahit kingdom for the sake of image. The historical method was applied in this study. The data were analyzed descriptively-qualitatively using historical analysis. The result of the study shows that the discourse of the “Bali Majapahit Kingdom” has been inspired by a central figure named Aryawedakarna for his political interest. He has smartly used the Majapahit kingdom and the resurgence of Hinduism as the inspiration to establish the image as a royal figure. Actually, what he has done is the political identity and was successfully appointed a member of the Regional Representative Council [Dewan Perwakilan Daerah] with more or less 200,000 votes in the 2014 election.
Editorial
Authors: Amaruli Rabith Jihan
Published: March 2019

Editorial JSCL edisi kali ini mengangkat tiga isu utama, yakni historiografi dalam balutan politik ingatan, identitas kota, dan warisan budaya. Historiografi adalah proses rekonstruksi sejarah dengan asumsi bahwa masa lampau sebagai aktualitas adalah sebuah konstruksi sebagai hasil dari proses-proses sosial dengan segala kompleksitasnya (Garraghan, 1957: 396). Sejak karya Bambang Purwanto (2006) berjudul Gagalnya Historiografi Indonesiasentris?! mewarnai diskursus historiografi Indonesia, sejarawan mulai mempertanyakan kembali atau setidaknya menggagas kembali, historiografi Indonesiasentris yang dianggap gagal menyajikan realitas historis yang “manusiawi”. Senada dengan gagasan Purwanto, Singgih Tri Sulistiyono (2016) menggugat ketidakmampuan historiografi Indonesia untuk ikut ambil bagian dalam memecahkan persoalan bangsa. Hal ini karena, masih menurut Sulistiyono, disebabkan oleh keterbelengguan pada formalisme metodologi dan epistemologi serta oleh sikap kurang berani sejarawan untuk menggugat realitas kekinian.
AJET bibliometrics and licensing
Authors: Heinrich Eva , Henderson Michael , Redmond Petrea
Published: March 2019

In this editorial we present the bibliometric data and explain the new Creative Commons license being adopted from Volume 36. The bibliometrics include the journal’s publication, review and article access statistics, the articles attracting the most interest over the past year and the citation performance of the journal.
Measurement of Drilling Fluid Rheology and Modeling of Thixotropic Behavior
Authors: Skadsem Hans Joakim , Leulseged Amare , Cayeux Eric
Published: March 2019

Drilling fluids perform a number of important functions during a drilling operation, including that of lifting drilled cuttings to the surface and balancing formation pressures. Drilling fluids are usually designed to be structured fluids exhibiting shear thinning and yield stress behavior, and most drilling fluids also exhibit thixotropy. Accurate modeling of drilling fluid rheology is necessary for predicting friction pressure losses in the wellbore while circulating, the pump pressure needed to resume circulation after a static period, and how the fluid rheology evolves with time while in static or near-static conditions. Although modeling the flow of thixotropic fluids in realistic geometries is still a formidable future challenge to be solved, considerable insights can still be gained by studying the viscometric flows of such fluids. We report a detailed rheological characterization of a water-based drilling fluid and an invert emulsion oilbased drilling fluid. The micro structure responsible for thixotropy is different in these fluids which results in different thixotropic responses. Measurements are primarily focused at transient responses to step changes in shear rate, but cover also steady state flow curves and stress overshoots during start-up of flow. We analyze the shear rate step change measurements using a structural kinetics thixotropy model.
Performance of a novel high sensitivity cardiac troponin I assay in asymptomatic hemodialysis patients – evidence for sex-specific differences
Authors: Artunc Ferruh , Haag Stefanie , Friedrich Björn , Mueller Christian , Häring Hans-Ulrich , Peter Andreas
Published: March 2019

Background

High sensitivity assays for the determination of cardiac troponin I (cTnI) are able to reliably measure cTnI far below the 99th percentile of healthy persons (hs-cTnI) and display sex-specific differences. There is uncertainty regarding the clinical utility of hs-cTnI in asymptomatic hemodialysis (HD) patients and if sex-specific differences also apply in this cohort.

Methods

In this multicenter study we measured hs-cTnI and sensitive cTnI (s-TnI) concentrations (both on Siemens Centaur) in 215 HD patients from a predialytic sample to determine the prevalence of elevated concentrations above the 99th percentile, the association with baseline characteristics, prognostic accuracy for death, and sex-specific differences.

Results

Hs-cTnI and s-cTnI concentrations were below the 99th percentile in 93% and 85% of patients with a median concentration of 12 ng/L (interquartile range 7–66) and 19 ng/L (12; 31, p < 0.0001). Hs-cTnI and s-cTnI concentrations were independently associated with age (p < 0.05) and ischemic cardiac disease (p < 0.05), but not with residual renal function. Both hs-cTnI and s-cTnI were predictors of death after median follow-up of 2.6 years with an AUC of 0.733 and 0.744, respectively (both p < 0.0001). Important sex-differences emerged for hs-cTnI, but not for s-cTnI: first, women had significantly lower hs-cTnI concentrations than men (p = 0.03); second, hs-cTnI had significantly higher prognostic accuracy for death in women than for men (AUC 0.824 vs. 0.674, p = 0.04).

Conclusions

The majority of HD patients have (h)s-cTnI concentrations below the 99th percentile. High normal values are predictive of death. Hs-cTnI allows to elucidate important sex-differences in HD patients with lower concentrations and higher prognostic accuracy in women.
Numerical Solution of Space and Time Fractional Telegraph Equation: A Meshless Approach
Authors: Bansu Hitesh , Kumar Sushil
Published: March 2019

In recent years, there has been an incredible enthusiasm towards fractional order partial differential equations because of their incessant presence alongside different fields. Fractional derivatives offer an in-depth and precise analysis of the models of the systems. Particularly, fractional order telegraph equations (FOTE) have been taken into consideration and solved by plenty of researchers, using different techniques. In this paper, we present a novel approach and technique to solve fractional telegraph equation by fusion of cubic radial basis function and Chebyshev polynomials with the aid of Kronecker product. The numerical examples have been considered to verify the accuracy and also to demonstrate the performance of the new approach.
The Multiplicity of Solutions for a Class of Nonlinear Fractional Dirichlet Boundary Value Problems with p-Laplacian Type via Variational Approach
Authors: Li Dongping , Chen Fangqi , An Yukun
Published: March 2019

In this paper, by using variational methods and a critical point theorem due to Bonanno and Marano, the existence of at least three weak solutions is obtained for a class of p-Laplacian type nonlinear fractional coupled systems depending on two parameters. Two examples are given to illustrate the applications of our main results.
Unfilled Training Positions in Germany – Regional and Establishment-Specific Determinants
Authors: Dummert Sandra , Leber Ute , Schwengler Barbara
Published: March 2019

The current situation in the German apprenticeship market is characterized by two contradictory developments. On the one hand, establishments are experiencing increasing problems filling the training positions they offer, and the number of vacant training positions is climbing. On the other hand, the transition into training is still difficult for many young people, and the number of unsuccessful vocational training applicants is rising. Hence, matching supply with demand is becoming increasingly difficult in the German job market for training positions. Using the Linked Employer-Employee dataset (LIAB) from the Institute for Employment Research (IAB), our paper provides a closer examination of the phenomenon of unfilled training positions. It presents an overview of the evolution of vacant training positions in eastern and western Germany and attempts to explain the number of vacancies by investigating the factors responsible for the establishments’ inability to fill their training positions. We assume that training position vacancies are due not only to internal company reasons such as firm size or the wage offer for apprentices but also to external conditions such as general regional factors. Therefore, our analysis also considers the situation on the demand side of the labor market within a region. The results of our multilevel mixed-effects estimations show that in addition to characteristics on the enterprise level, regional determinants also affect the share of vacant apprenticeships. With respect to establishment-related factors, mainly characteristics that describe the attractiveness of the firm prove to be important. With regard to regional-specific factors, we find that the availability of school leavers in a region in addition to the level of regional-sectoral competition impacts the recruiting success of establishments. Our analysis also shows that there are remarkable differences between eastern and western Germany concerning both the quantitative importance of unfilled training positions and the factors affecting them.
Language attitudes of young Romanians in Catalonia (Spain): The role of heritage language maintenance programs
Authors: Ianos Maria Adelina , Caballé Ester , Petreñas Cristina , Huguet Ángel
Published: March 2019

This article presents a mixed method analysis of the language attitudes held by secondary education students of Romanian origin, which are members of the second largest immigrant population living currently in Catalonia. The relevance of this data is based on the cardinal role played by attitudes in the success of any educational or linguistic policy (Lewis, E. Glyn. 1981. Bilingualism and bilingual education. Oxford, UK: Pergamon.) – a topic of special relevance in contexts with considerable migratory influxes, such as Catalonia, which aims to achieve social cohesiveness in a framework of interculturalism and multilingualism. The various initiatives implemented for this purpose include the heritage language maintenance programs, such as the “Romanian Language, Culture, and Civilization” (RLCC) program. The results showed that the young Romanians had the most favourable attitudes towards Spanish, followed closely by Romanian, and lastly Catalan, which was the least valued language. Furthermore, these attitudinal patterns were not determined by RLCC attendance. The insights provided by the in-depth interviews indicated various components and meanings associated with the attitudes towards the three languages. Namely, attitudes towards Spanish were primed by its international status and ease of learning, while attitudes towards Catalan were build on its integrative value and social status. Although esteemed for its emotional and symbolic bonds, Romanian seemed to be on a path towards invisibilization. Finally, the educational and social implications of these findings are discussed, emphasising the importance of involving and working with both the autochthonous and the Romanian immigrant population.
Enhancing functionalities of atomically thin semiconductors with plasmonic nanostructures
Authors: Cotrufo Michele , Sun Liuyang , Choi Junho , Alù Andrea , Li Xiaoqin
Published: March 2019

Atomically thin, two-dimensional, transition-metal dichalcogenide (TMD) monolayers have recently emerged as a versatile platform for optoelectronics. Their appeal stems from a tunable direct bandgap in the visible and near-infrared regions, the ability to enable strong coupling to light, and the unique opportunity to address the valley degree of freedom over atomically thin layers. Additionally, monolayer TMDs can host defect-bound localized excitons that behave as single-photon emitters, opening exciting avenues for highly integrated 2D quantum photonic circuitry. By introducing plasmonic nanostructures and metasurfaces, one may effectively enhance light harvesting, direct valley-polarized emission, and route valley index. This review article focuses on these critical aspects to develop integrated photonic and valleytronic applications by exploiting exciton–plasmon coupling over a new hybrid material platform.
Synthesis and characterization of size controlled bimetallic nanosponges
Authors: Wang Dong , Schaaf Peter
Published: March 2019

Metallic and bimetallic nanosponges with well-defined size and form have attracted increasing attention due to their unique structural properties and their potential for many applications. In this chapter, the recently developed methods for the synthesis and preparation of metallic and bimetallic nanosponges are presented. These methods can be mainly cataloged in two groups: dealloying-based methods and reduction reaction-based methods. Different topographical reconstruction methods for the investigation of their structural properties are then reviewed briefly. The optical properties of the metallic nanosponges are clearly different from those of the solid counterparts due to the tailored disordered structure. The recent advances in the exploration of the distinct linear and non-linear optical properties of the nanosponges are summarized.

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Radiation – induced preparation of polyaniline/poly vinyl alcohol nanocomposites and their properties
Authors: Saleh Hoda H. , Sokary Rehab , Ali Zakaria I.
Published: March 2019

Polyaniline (PANI) nanoparticles and PANI/poly vinyl alcohol (PVA) nanocomposite films were synthesized by the oxidative polymerization of aniline and ammonium peroxodisulfate (APS), as an oxidizing agent in aqueous medium. The PANI/PVA nanocomposite films were exposed to γ-irradiation after oxidative polymerization. Synthesized polyaniline (PANI) nanoparticles and PANI/PVA nanocomposite films were characterized by attenuated total reflectance infrared spectroscopy (FTIR-ATR), X-ray diffraction, high resolution scanning electron microscopy, (HRSEM) high resolution transmission electron microscopy, (HRTEM) and UV-VIS absorption spectroscopy. Energy band gap of PANI nanofibers was determined from Tauc’s plots which equal 4.2 eV. Scanning electron microscopy images show that chemically synthesized of polyaniline has nanofibers structure and irradiated PANI/PVA nanocomposite have a mixture of nanorod and nanosphere structures. The transmission electron microscopy show that chemically synthesized of polyaniline has average length in the range 34 ± 10 nm with less wide distribution, where as the irradiated PANI/PVA nanocomposite has coreshell structure.
Spontaneous emergence of language-like and music-like vocalizations from an artificial protolanguage
Authors: Ma Weiyi , Fiveash Anna , Thompson William Forde
Published: March 2019

How did human vocalizations come to acquire meaning in the evolution of our species? Charles Darwin proposed that language and music originated from a common emotional signal system based on the imitation and modification of sounds in nature. Thisprotolanguageis thought to have diverged into two separate systems, with speech prioritizingreferentialfunctionality and music prioritizingemotionalfunctionality. However, there has never been an attempt to empirically evaluate the hypothesis that a single communication system can split into two functionally distinct systems that are characterized by music- and languagelike properties. Here, we demonstrate that when referential and emotional functions are introduced into an artificial communication system, that system will diverge into vocalization forms with speech- and music-like properties, respectively. Participants heard novel vocalizations as part of a learning task. Half referred to physical entities and half functioned to communicate emotional states. Participants then reproduced each sound with the defined communicative intention in mind. Each recorded vocalization was used as the input for another participant in a serial reproduction paradigm, and this procedure was iterated to create 15 chains of five participants each. Referential vocalizations were rated as morespeech-like, whereas emotional vocalizations were rated as moremusic-like, and this association was observed cross-culturally. In addition, a stable separation of the acoustic profiles of referential and emotional vocalizations emerged, with some attributes diverging immediately and others diverging gradually across iterations. The findings align with Darwin’s hypothesis and provide insight into the roles of biological and cultural evolution in the divergence of language and music.
Water in zeolite L and its MOF mimic
Authors: Fois Ettore , Tabacchi Gloria
Published: March 2019

Confinement of molecules in one dimensional arrays of channel-shaped cavities has led to technologically interesting materials. However, the interactions governing the supramolecular aggregates still remain obscure, even for the most common guest molecule: water. Herein, we use computational chemistry methods (#compchem) to study the water organization inside two different channel-type environments: zeolite L – a widely used matrix for inclusion of dye molecules, and ZLMOF – the closest metal-organic-framework mimic of zeolite L. In ZLMOF, the methyl groups of the ligands protrude inside the channels, creating nearly isolated nanocavities. These cavities host well-separated ring-shaped clusters of water molecules, dominated mainly by water-water hydrogen bonds. ZLMOF provides arrays of “isolated supramolecule” environments, which might be exploited for the individual confinement of small species with interesting optical or catalytic properties. In contrast, the one dimensional channels of zeolite L contain a continuous supramolecular structure, governed by the water interactions with potassium cations and by water-water hydrogen bonds. Water imparts a significant energetic stabilization to both materials, which increases with the water content in ZLMOF and follows the opposite trend in zeolite L. The water network in zeolite L contains an intriguing hypercoordinated structure, where a water molecule is surrounded by five strong hydrogen bonds. Such a structure, here described for the first time in zeolites, can be considered as a water pre-dissociation complex and might explain the experimentally detected high proton activity in zeolite L nanochannels.
Decomposition Kinetics of Levofloxacin: Drug-Excipient Interaction
Authors: Nisar Jan , Iqbal Mudassir , Iqbal Munawar , Shah Afzal , Akhter Mohammad Salim , Sirajuddin  , Khan Rafaqat Ali , Uddin Israr , Shah Luqman Ali , Khan Muhammad Sufaid
Published: March 2019

The present study is focused on the thermal decomposition of Levofloxacin in the absence and presence of different excipients (sodium starch glycolate, magnesium stearate, microcrystalline cellulose and lactose using Thermogravimetry (TG). Fourier Transform Infra Red Spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) were used to study the possible drug – excipient interaction. It has been shown that the interaction of the first three excipients (sodium starch glycolate, magnesium stearate, and microcrystalline cellulose) with Levofloxacin is physical in nature. Lactose was shown to decrease the degradation temperature to a maximum extent. This indicates a strong chemical interaction between the drug and lactose. The activation energies in the former case were found almost similar but deviated considerably in the latter case.
A New Mathematical Approach to Explore the Post-exercise Recovery Process and Its Applicability in a Cold Water Immersion Protocol
Authors: Micheletti Jéssica K. , Vanderlei Franciele M. , Machado Aryane F. , de Almeida Aline C. , Nakamura Fábio Y. , Netto Junior Jayme , Pastre Carlos Marcelo
Published: March 2019

Micheletti, JK, Vanderlei, FM, Machado, AF, de Almeida, AC, Nakamura, FY, Netto Junior, J, and Pastre, CM. A new mathematical approach to explore the post-exercise recovery process and its applicability in a cold water immersion protocol. J Strength Cond Res 33(5): 1266–1275, 2019—The objective of this study was to propose a mathematical model to analyze the post-training recovery of perceptive, functional, metabolic, and autonomic parameters from the use of cold water immersion (CWI) through isolated and combined analysis. Following simulated training, 64 male soccer players were randomized into an experimental group (EG: CWI, 13 ± 1° C; 15 minutes) and a control group (CG: passive recovery; 15 minutes). Perceptive (soreness and perception of recovery), autonomic (heart rate variability [HRV]), metabolic (lactate concentration), and functional parameters (squat jump, T agility test, sprint test, 40-second test, and maximal voluntary isometric contraction) were analyzed before and at specific moments after training (without exceeding 2 hours after training). The variables were analyzed using the raw data, dichotomization of each variable (isolated analysis), and through a mathematical model using the combination of all parameters analyzed (combined analysis). The combined analysis did not demonstrate better efficacy of the EG compared with the CG (69.17 and 63.4%, p = 0.09). In the isolated analysis, a chance of the technique being better was observed in the metabolic parameter at 1 and 2 hours after training (odds ratio, 95% confidence interval = 3.75 [1.01–13.88] and 11.11 [1.25–98.49]), respectively, and in the autonomic parameter at 40–45 minutes after training (4.4 [1.09–17.67]). For the raw data, all parameters analyzed presented recovery by 2 hours after training for both groups. Based on the proposed mathematical model, it is concluded that CWI is not better than the control condition. However, considering the analysis of variables in isolation, the technique presents a better chance of recovery for blood lactate concentration and HRV.