bluuebunny/crossref_metadata_2025_split huggingface dataset:
Petrol Fiyatları ile Ekonomik Büyüme İlişkisi: Türkiye Örneği
Authors: KAMACI Ahmet , GÖKTAŞ Süleyman 
Published: November 2020

Üretimde önemli bir üretim maliyeti olan petrol fiyatları, ekonominin tüm sektörlerini etkilemektedir. Petrol fiyatlarındaki artış, maliyet enflasyonuna yol açacak, bu da üretimin azalmasına ve ekonomik büyümenin daralmasına neden olacaktır. Petrol fiyatlarında yaşanan dalgalanmalar, ekonomi üzerinde bir belirsizlik doğurmaktadır. Bu durum ise, yatırımları azaltarak istihdamın ve milli gelirin düşmesine neden olmaktadır.
Bu çalışmanın amacı, Türkiye’de 2003:Q1-2019:Q4 dönemlerindeki çeyreklik verilerle petrol fiyatları ile ekonomik büyüme ilişkisini incelemektir. Bu doğrultuda eşbütünleşme ve nedensellik analizi yapılmıştır. Çalışmadan elde edilen bulgulara göre, ekonomik büyümeden petrol fiyatlarına doğru tek yönlü bir nedensellik tespit edilmiştir. Aynı zamanda, petrol fiyatları ile ekonomik büyüme arasında uzun dönemli eşbütünleşik bir ilişki bulunmuştur.
The Influence of Chemical Cleaning Methods on Pitting Morphology Attributed to Microbially Influenced Corrosion of Stainless Steels
Authors: Javed M.A. , Rieders N. , Beech I. , Avci R. , Neil W.C. , Wade S.A. 
Published: November 2020

Chemical cleaning methods are frequently used for the removal of biofilm/corrosion products from metallic materials to evaluate the type and severity of microbially influenced corrosion (MIC) damage. The study described here investigates the effect of commonly applied cleaning treatments on the dissolution of stainless steel surface inclusions and emphasizes the potential impact of such treatments on MIC diagnostics. Polished 304 grade stainless steel coupons were ultrasonicated for 1 min, 3 min, and 7 min in each of the three commonly applied agents, i.e., Clarke’s, nitric acid, and hydrofluoric acid-based solutions. Post-treatment analyses of steel surfaces revealed pitting attack. For each treatment type and duration, the morphology and quantitative measurements of pits were recorded. Shape, size, and depth of examined pits closely resembled damage that, in many laboratory-based studies, have been attributed to MIC. The investigation herein demonstrates that caution ought to be exercised when implicating MIC as the cause of stainless steel pitting damage.
PENINGKATAN HASIL BELAJAR BIOLOGI MATERI EKOLOGI DENGAN MENGUNAKAN METODE KREATIF TIM PROYEK SISWA KELAS X IPA 8 SMAN 1 YOGYAKARTA
Authors: Menik Remen Lestari  
Published: November 2020

Penelitian ini dilatorbelakangi berdasarkan hasilobservasi dalam proses pembelajaran khususnya dalam materi lingkungan kelas X IPA8, sering kali siswa hanya memahami secara teoritispersoalan ekologi tidak dapat diaplikasikan dalam kehidupan sehari-hari. Permasalahan ini dapat diatasi dengan penelitian tindakan kelas dengan menggunakan metode kreatif tim proyek ekologi. Metode ini menekankan kegiatan belajar yang relatif berdurasi panjang, holistik interdisipliner, berpusat pada siswa dan terintegrasi dengan praktek dan isu-isu dunia nyata. Metode kreatif tim proyek ekologi diberikan dengan cara penugasan pembuatan miniseri drama bertema ekologi. Hasil Penelitian menunjukkan bahwa metode kreatif tim proyek ekologi berupa penugasan pembuatan miniseri drama bertema ekologi mampu meningkatkan hasil hasil belajar siswa di berbagai aspek kemampuan, baik kognitif, psikomotorik maupun afektif. Rata-rata nilai kognitif meningkat dari 83 menjadi 95. Hasil penilaian afektif rata-rata pada siklus I adalah 2.2 (kategori cukup) dan pada siklus II 3.8 (sangat baik). Sedangkan penilaian psikomotor juga terjadi peningkatan pada siklus I rata-ratanya adalah 79.2, sedangkan pada siklus II adalah 86.
ONLINE PHYSICS LEARNING VIA WHATSAPP, GOOGLE FORM, AND EMAIL IN THE ACHIEVEMENT OF ACTIVE PRESENCE AND STUDENT LEARNING OUTCOMES
Authors: Mulyadi Eko 
Published: November 2020

The corona virus outbreak is taking place in Indonesia and global society since March, 2020. The virus spread from person to person through physical contact so that the government prohibit gathering activities. This condition forced application of online learning in the field of education. This study aims to measure the active presence, learning outcomes and effectiveness of online physics learning through WhatsApp, google form, and email. Topics in online physics learning were Heat (March 24, 2020) and Thermodynamics (March 31, 2020). This study is an evaluation research that conducted in the following steps: 1) Determine the schedule for Physics online learning for class X every Tuesday at 09.00-10.30 am (1.5 hour), 2) Create or using the available a WhatsApp group that had been created by homeroom teacher, 3) Create a google form for student attendance, 4) Create a link to be delivered in the WhatsApp group, therefore the structured assignments were delivered via email, 5) Review student assignments, and 6) Recapitule students’ active presence and physics learning outcomes. Results of the study reveal that the average of students’ active attendance at March 24, 2020 was 87.25%, and the average learning outcomes was 87.89. The average of students active attendance and the average learning outcomes at March 31, 2020 were 94.75%, and 79.66, respectively. The average achievement of active attendance and learning outcomes were 91% and 83.77, respectively. This result indicate that student achievement was passed the minimum competence level in physics, i.e 75. It can be concluded that online physics learning using WhatsApp for communication combined with google form for assessment is effective, both for teacher and students.
Gravity-wave-perturbed wind shears derived from SABER temperature observations
Authors: Liu Xiao , Xu Jiyao , Yue Jia , Liu Hanli 
Published: November 2020

Abstract. Large wind shears around the mesopause region play
an important role in atmospheric neutral dynamics and ionospheric
electrodynamics. Based on previous observations using sounding rockets,
lidars, radars, and model simulations, large shears are mainly attributed to
gravity waves (GWs) and modulated by tides (Liu, 2017). Based on the
dispersion and polarization relations of linear GWs and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER)
temperature data from 2002 to 2019, a method of deriving GW-perturbed wind
shears is proposed. The zonal-mean GW-perturbed shears have peaks (13–17 ms−1 km−1) at around the mesopause region, i.e., at z = 90–100 km
at most latitudes and at z = 80–90 km around the cold summer mesopause. This
latitude–height pattern is robust over the 18 years and agrees with model
simulations. The magnitudes of the GW-perturbed shears exhibit year-to-year
variations and agree with the lidar and sounding rocket observations in a climatological sense but are 60 %–70 % of the model results in the zonal-mean
sense. The GW-perturbed shears are hemispherically asymmetric and have strong
annual oscillation (AO) at around 80 km (above 92 km) at the northern
(southern) middle and high latitudes. At middle to high latitudes, the peaks
of AO shift from winter to summer and then to winter again with increasing
height. However, these GW-perturbed shears may be overestimated because the
GW propagation direction cannot be resolved by the method and may be
underestimated due to the observational filter, sampling distance, and cutoff
criterion of the vertical wavelength of GWs.
El enfoque ciencia, tecnología y sociedad (CTS) en Cuba. Vicisitudes históricas, principales logros y deficiencias, y la nueva política en el marco del perfeccionamiento del Nuevo Modelo Económico
Authors: Hernández Hernández Carlos César , Valdivia Valdés Maité Felicia , Díaz Martínez Eddy Yoel 
Published: November 2020

El trabajo consiste en una explicación de la evolución del proceso ciencia, tecnología e innovación tecnológica en la etapa colonial, neocolonial y la revolución socialista en Cuba, con intentos frustrados en las primeras etapas, encontrando en la última la posibilidad de desarrollo limitado.
Las intenciones de la política de ciencia, técnica e innovación tecnológica tienen la finalidad de insertar al país en la economía mundial, con mayor diversificación económica y de mayor sostenibilidad alimentaria y ecológica.
La principal característica del proceso de la ciencia, técnica e innovación desde 1959 a 1990 consistió en la transferencia tecnológica recibida en el marco de las preferenciales relaciones económicas y científicas establecida; sin embargo, a partir de la aprobación de una nueva reforma económica en el 2011 en que se aprueban nuevos Lineamientos económicos, políticos y sociales del Partido, se produce un despegue de dicha política, donde la ciencia cumple importantes funciones en el perfeccionamiento de nuestro modelo económico socialista.
PORTELA, Manuel y RITO, António Silva (eds.). Archivo LdoD: Archivo digital colaborativo del Libro del desasosiego. Centro de Literatura Portuguesa de la Universidad de Coimbra, Coimbra, 2017.
Authors: De Jesus Boto Sandra Cristina 
Published: November 2020

El Archivo LdoD es un proyecto desarrollado en el Centro de Literatura Portuguesa de la Universidad de Coimbra, bajo coordinación del Profesor Manuel Portela.Presenta un concepto novedoso de archivo virtual, desde el que se le invita al usuario a modificar su base de datos y a crear, individual o en colaboración, ediciones virtuales del Libro del desasosiego del escritor portugués Fernando Pessoa.
Représentations du pouvoir communicationnel des parents : synthèse sur deux décennies d’analyse réflexive en partenariat
Authors: Kalubi Jean-Claude , Angrand Rosly 
Published: November 2020

Ce texte vise à décrire la force émancipatrice constatée au cours de l’analyse des interactions spécifiques entre protagonistes, puis la participation de ces derniers à des groupes de réflexion. Il s’appuie essentiellement sur des travaux de recherche conduits auprès des parents d’enfants vivant avec des incapacités, depuis près de deux décennies. Il met en lumière l’apport des notions d’empowerment et de pouvoir communicationnel. Il souligne les ajustements structurels constatés au fil des rencontres de groupe, concernant notamment les techniques d’animation de groupe, les stratégies d’analyse des données, les processus de résolution de problèmes, ainsi que l’évolution des représentations collectives. En tenant compte des recommandations formulées par les participants, des conditions d’application, des catégories d’attitudes adaptatives et des comportements organisationnels, quelques ficelles d’analyste vont être mises en évidence ; elles pourront aider à rendre explicite les représentations de l’empowerment, de même que l’émergence du pouvoir communicationnel des parents.
For the Benefit of All Men: Oceanography and Franco‐American Scientific Diplomacy in the Cold War, 1958–1970**
Authors: Martínez‐Rius Beatriz 
Published: November 2020

AbstractIn the 1960s, the growing strategic importance of ocean exploration led the French government to develop greater capacity in marine scientific research, aiming to promote cooperative and diplomatic relations with the leading states in ocean exploration. Devised during Charles de Gaulle's government (1958–1969), the restructuring of French oceanography culminated, in 1967, in the establishment of the state‐led Centre National pour l'Exploitation des Océans (CNEXO). Beyond being intended to control the orientation of marine research at a national level, the CNEXO's mission was to use scientific diplomacy to balance a desire for enhancing international cooperative relations in oceanography with French ambitions to equal the USA's leading capacity to explore the oceans. Its director, the naval officer Yves la Prairie, played a crucial role in articulating scientific, national, and diplomatic interests for France in the oceans.
PQQ‐dependent Dehydrogenase Enables One‐pot Bi‐enzymatic Enantio‐convergent Biocatalytic Amination of Racemic sec‐Allylic Alcohols
Authors: Gandomkar Somayyeh , Rocha Raquel , Sorgenfrei Frieda A. , Montero Lía Martínez , Fuchs Michael , Kroutil Wolfgang 
Published: November 2020

AbstractThe asymmetric amination of secondary racemic allylic alcohols bears several challenges like the reactivity of the bi‐functional substrate/product as well as of the α,β‐unsaturated ketone intermediate in an oxidation‐reductive amination sequence. Heading for a biocatalytic amination cascade with a minimal number of enzymes, an oxidation step was implemented relying on a single PQQ‐dependent dehydrogenase with low enantioselectivity. This enzyme allowed the oxidation of both enantiomers at the expense of iron(III) as oxidant. The stereoselective amination of the α,β‐unsaturated ketone intermediate was achieved with transaminases using 1‐phenylethylamine as formal reducing agent as well as nitrogen source. Choosing an appropriate transaminase, either the (R)‐ or (S)‐enantiomer was obtained in optically pure form (>98 % ee). The enantio‐convergent amination of the racemic allylic alcohols to one single allylic amine enantiomer was achieved in one pot in a sequential cascade.
Points to Consider for Implementation of the ICH E17 Guideline: Learning from Past Multiregional Clinical Trials in Japan
Authors: Asano Kunihito , Aoi Yoko , Kamada Shuji , Uyama Yoshiaki , Tohkin Masahiro 
Published: November 2020

We identified the major points that are described in the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) E17 guideline but have not been considered in the past multiregional clinical trials (MRCTs) used for drug approval in Japan to elucidate potential challenges in the implementation of the ICH E17 guideline in Japan. Based on the analysis of 167 MRCTs of 130 drugs, several points, such as the same dose setting and consistency between the overall and Japanese populations, in addition to good clinical practice compliance, have been well considered in ≥ 75% of MRCTs. In contrast, the use of relevant guidelines for disease and primary end point definitions, standardization of efficacy/safety information, sample size allocation, as well as training/validation on subject selection and primary end point, have been addressed less adequately and may need to be considered when planning future MRCTs. This study provides useful information for the implementation of the ICH E17 guideline in Japan.
Intersegment mismatch mitigation with multidimensional dynamic element matching digital to analog converters
Authors: Babaei Bardia , Hashemipour Omid 
Published: November 2020

SummaryIn this paper, a two‐dimensional dynamic element matching digital to analog converter (2D DEM DAC) is proposed having less design complexity compared to the conventional 2D DEM DAC. A novel unit element selection algorithm is presented in order to alleviate the need for consecutive elements selection that is mandatory in the conventional 2D DEM DAC. The flexibility of this algorithm leads to the introduction of a generalized multidimensional DEM DAC applicable to any resolutions. The multidimensional structure mitigates intersegment mismatch error and improves the spurious‐free dynamic range (SFDR) and intermodulation distortion (IMD). A 12‐bit 2D DEM DAC is simulated in 65‐nm CMOS process using the digital return‐to‐zero (DRZ) technique with 1.2 V of supply voltage and power dissipation of 26 mW. The simulation results show 63.4‐ and 60.71‐dB SFDR at near DC and Nyquist frequency, respectively, and <−61‐dB IMD with 1.25‐GHz sampling frequency.
Intraday conditional value at risk: A periodic mixed‐frequency generalized autoregressive score approach
Authors: Eckernkemper Tobias , Gribisch Bastian 
Published: November 2020

AbstractWe propose a copula‐based periodic mixed frequency generalized autoregressive (GAS) framework in order to model and forecast the intraday exposure conditional value at risk (ECoVaR) for an intraday asset return and the corresponding market return. In particular, we analyze GAS models that account for long‐memory‐type of dependencies, periodicities, asymmetric nonlinear dependence structures, fat‐tailed conditional return distributions, and intraday jump processes for asset returns. We apply our framework in order to analyze the ECoVaR forecasting performance for a large data set of intraday asset returns of the S&P500 index.
Einteilung von Boden in Homogenbereiche bei maschinellen Tunnelvortrieben – Kennwerte, Vortriebsabschnitte, Beispiele
Authors: Budach Christoph 
Published: November 2020

AbstractDie Einteilung des Baugrunds in Homogenbereiche spielt bereits seit 2015 eine wichtige Rolle bei der Kalkulation und Ausführung von Infrastrukturprojekten. Die Anzahl der Projekte, bei denen der Baugrund in Homogenbereiche unterteilt wird, wenn Tunnelbohrmaschinen im Lockergestein genutzt wurden, ist aktuell hingegen noch sehr gering, wird in den kommenden Jahren aber weiter steigen und somit die Einteilung des Baugrunds an Bedeutung gewinnen. Bei maschinellen Vortrieben im Lockergestein können u. U. mehrere Schichten an der Ortsbrust auftreten, die bei der Einteilung des Baugrunds in Homogenbereiche zu berücksichtigen sind. Der vorliegende Beitrag geht auf die wesentlichen Merkmale bei der Einteilung des Baugrunds in Homogenbereiche bei maschinellen Vortrieben im Lockergestein unter Berücksichtigung der DIN 18312:2019 und der aktuellen Empfehlung des Deutschen Ausschusses für unterirdisches Bauen e. V. (DAUB) zur Auswahl von Tunnelbohrmaschinen ein. Ferner werden Empfehlungen zusammengefasst, welche über die in DIN 18312:2019 aufgeführten geotechnischen Parameter hinaus bestimmt bzw. welche Versuche zusätzlich durchgeführt werden sollten, um den Baugrund für den Vortrieb zu beschreiben. Es werden Möglichkeiten aufgezeigt, wie bei unterschiedlichen Baugrundverhältnissen die Einteilung in Homogenbereiche erfolgen kann und wie eine Umsetzung im Leistungsverzeichnis möglich ist. Basierend auf diesen Möglichkeiten werden Empfehlungen aufgeführt, wie die Berücksichtigung von geo‐ und tunnelbautechnischen Besonderheiten eines maschinellen Vortriebs im Lockergestein zu einer transparenten Ausschreibung führt.
Thermochemistry and viscous heat dissipative effects on unsteady upper‐convected Maxwell fluid flow past a stretching vertical plate with thermophysical variables
Authors: Idowu Amos S. , Olabode John O. 
Published: November 2020

AbstractIn this paper, unsteady upper‐convected Maxwell fluid flow with variability in viscosity, thermal conductivity, and mass diffusivity is presented. The effects of chemical reaction, internal heat generation, and viscous dissipation with respect to variability properties were explored. The governing partial differential equations were transformed with the appropriate similarity transformation variables into nonlinear coupled ordinary differential equations. The spectral collocation method was used to solve the resulting ordinary differential equations. Hence, the effects of various parameters such as temperature‐dependent viscosity and thermal conductivity, mass diffusivity parameters among others on velocity, temperature, concentration, skin friction, local heat and mass transfers were presented in graphs and tables. It is seen that heat and molecules of the fluid disperse faster as a result of destructive chemical reaction, while, the temperature‐dependent viscosity and thermal conductivity gave increasing profiles of the momentum and thermal boundary layer. The viscous dissipative parameter generates heat and yields a buoyancy force in consequence.
Radiative CNT‐based hybrid magneto‐nanoliquid flow over an extending curved surface with slippage and convective heating
Authors: Ali Asgar , Jana R. N. , Das Sanatan 
Published: November 2020

AbstractThis study concentrates on the hydrothermal prominence of a mixed convective flow of a hybrid nanoliquid over a convectively heated extending curved surface under the influence of a uniform transverse magnetic field. Two types of carbon nanotubes (CNTs), namely single‐walled carbon nanotubes (SWCNTs) and multi‐walled carbon nanotubes (MWCNTs), and magnetite nanoparticles are dispersed in the host liquid (water) to simulate the hybrid nanoliquid flow model. First‐ and second‐order velocity slip conditions and nonlinear radiative heat flux are incorporated in this model. First, the system of governing partial differential equations is changed into nonlinear ordinary differential equations through the utilization of appropriate transformations and computed numerically via MATLAB built‐in function bvp4c based on the three‐stage Lobatto IIIA technique. The consequences of physical and geometrical parameters pertinent to this analysis on the dimensionless physical quantities of interest are deliberated using requisite graphs and tables. Our simulation communicates that the first‐order velocity slip parameter decreases the velocity profile, whereas the second‐order velocity slip parameter is found to be augmented. The suspension of CNTs in the magnetite nanoliquid improves the local surface drag force but diminishes the local heat flux. Moreover, it is examined that SWCNTs have greater impacts than MWCNTs.
Dosing Recommendations for Lamotrigine in Children: Evaluation Based on Previous and New Population Pharmacokinetic Models
Authors: Tauzin Manon , Tréluyer Jean‐Marc , Nabbout Rima , Billette de Villemeur Thierry , Desguerre Isabelle , Aboura Radia , Gana Ines , Zheng Yi , Benaboud Sihem , Bouazza Naim , Chenevier‐Gobeaux Camille , Freihuber Cécile , Hirt Déborah 
Published: November 2020

AbstractLamotrigine is a broad‐spectrum antiepileptic drug with high interindividual variability in serum concentrations in children. The aims of this study were to evaluate the predictive performance of pediatric population pharmacokinetic (PPK) models published on lamotrigine, to build a new model with our monitoring data and to evaluate the current recommended doses. A validation cohort included patients treated with lamotrigine who had a serum level assayed during therapeutic drug monitoring (TDM). PPK models published in the literature were first applied to the validation cohort. We assessed their predictive performance using mean prediction errors, root mean squared errors, and visual predictive checks. A new model was then built using the data. Dose simulations were performed to evaluate the doses recommended. We included 270 lamotrigine concentrations ranging from 0.5 to 17.9 mg/L from 175 patients. The median (range) age and weight were 11.8 years (0.8‐18 years) and 32.7 kg (8‐110 kg). We tested 6 PPK models; most had acceptable bias and precision but underestimated the variability of the cohort. We built a 1‐compartment model with first‐order absorption and elimination, allometric scaling, and effects of inhibitor and inducer comedications. In our cohort, 22.6% of trough concentrations were below 2.5 mg/L. In conclusion, we proposed a PPK model that can be used for TDM of lamotrigine in children. In our population, a high percentage of children had low trough concentrations of lamotrigine. As the intervals of recommended doses are large, we suggest aiming at the higher range of doses to reach the target concentration.