bluuebunny/crossref_metadata_2025 huggingface dataset:
Episodic memory recognition of the hippocampus using a deep learning method
Authors: Kuremoto Takashi
Published: March 2021

Hippocampus plays an important role in processing episodic memory. The different patterns of multi-unit activity (MUA) of CA1 neurons in hippocampus corresponds to the different high order functions of the brain such as memory, association, planning, action decision, etc. In this paper, a deep learning model, which is a composition of convolutional neural network (CNN) and support vector machine (SVM), is adopted to classify 4 kinds of episodic memories of a male rat: restraint stress (restraint), contact with a female rat (female), contact with a male rat (male), and contact with a novel object (object). In addition, the characteristic patterns of the different events occurred in CA1 neurons are specified by the feature explanation of CNN using Grad-CAM. As the result, this study suggests that it is available to recognize episodic memories by MUA signals and vice versa.
Improving Aviation Insurance System in Russia
Authors: Yu. Sivoplyasova Svetlana , M. Voinov Sergey
Published: March 2021

The article is devoted to the study of aviation insurance system in Russia. The novelty is the presentation of aviation insurance as a system of elements. Within the framework of the study, the ranking of insurance companies by indicators of financial stability was carried out on the basis of the methodology proposed by Sberbank. The most stable company is National Insurance Group. An important result is the comparative analysis of aviation industry and aviation insurance industry in the period before and after the COVID-19 pandemic. As a part of the study, the dynamics of passenger traffic was analyzed, and the features of the formation of insurance rates before and after the announcement of the COVID-19 pandemic were revealed. The authors offer recommendations for insurance companies in order to help them overcome the crisis as soon as possible.
Using Case Study Method for Forming Clinical Thinking Ability in Nursing and Midwifery Education
Authors: Hristova Tsveta , Todorova Teodora , Markova Maya
Published: March 2021

This paper aims to examine the formation of clinical thinking within the case study method in teaching midwifery and nursing students. Statistical methods include the Kolmogorov-Smirnov test and the Mann-Whitney U test. After the analysis of the data, it was concluded that the use of the method develops the necessary medical competence for quality realization in the chosen profession.
Friction Coefficient Estimate for Threaded Joints Made of Carbon-Carbon Composite Materials
Authors: Lyubchenko M.A.
Published: March 2021

Experimental studies were carried out to estimate the friction coefficients for a screw-nut threaded pair made of spatially reinforced carbon-carbon composite materials (CCCM). Quantitative values were obtained for the thread friction coefficient and nut end friction coefficient. The ultimate screw-in torque for the CCCM threaded pair was determined, and its failure mode at a destructive screw-in torque was established. The laboratory tests were carried out to measure the tightening force. The nut screw-in torque was measured using a torque wrench.
Primary Design of Vaneless Diffusers of Centrifugal Compressor Stages by the Universal Modeling Method
Authors: Solovyeva O.A. , Soldatova K.V. , Galerkin Y.B. , Rekstin A.F.
Published: March 2021

Vaneless diffusers of industrial centrifugal compressors most often consist of a tapered inlet section and a parallel-walled main section. The study proposes to choose such a width of the main section, at which the flow in the diffuser remains unseparated at the surge limit. To implement the primary design method, an empirical formula was obtained to determine the minimum continuous flow angle depending on the relative width of the diffuser. The primary design of eighteen stages was completed, covering a practically important range of parameters. The corresponding gas-dynamic characteristics were calculated by the universal modeling method, the dimensions and angles of the flow were analyzed. The proposed primary design method is integrated into the universal modeling method and is used in design practice.
Development of a Method for Determining Radiant Heat Transfer for Spacecraft Platforms in Near Earth Orbit Flight
Authors: Mikhailovskiy K.V. , Gorodetskiy M.A.
Published: March 2021

External heat fluxes are the main factor affecting spacecraft in near-earth orbits. These fluxes can vary during orbital motion due to the different orientation of the satellite to the Sun. To develop a method for simulating heat fluxes incident on structural elements of the outer surfaces of a spacecraft, taking into account their operating conditions, is an urgent task. The paper introduces a method for a comprehensive analysis of heat fluxes incident on the structural elements of a spacecraft under conditions in near-earth orbit flight. Within the study, we consider direct and reflected from the Earth solar fluxes of thermal radiation, as well as infrared fluxes of radiation from the Earth and "visible" structural elements. To verify the compiled model, we carried out mathematical simulation of the thermal loading of the outer side of the spacecraft platform, located on the illuminated side of the sun-synchronous orbit. The method will be useful when choosing a working orbit in designing a spacecraft at the stage of technical proposals.
Molecular Characterization of Velogenic Avian Avulavirus Type 1 Isolated from Apparently Healthy Emu Birds: Implications to Viral Maintenance and Spread
Authors: Deepthi B. , Ratnamma D. , Pushpa R.N. Ramani , Isloor Shrikrishna , Veeregowda B.M. , Satyanarayana M.L.
Published: March 2021

Background: Newcastle disease caused by Avian avulavirus type 1 (AAvV-1) is one of the dreadful diseases affecting poultry and other avian species. Wild birds and several domestic birds are recognized as reservoirs of AAvV-1 and probably contribute to the epidemiology of ND in the domesticated poultry. Hence, efforts have been made to understand the virulence and genetic nature of AAvV-1 isolates obtained from apparently healthy Emu birds. Methods: This study details characterization of a velogenic Emu/5 AAvV-1 isolate obtained from an asymptomatic emu flock. Full- length fusion gene was amplified and subsequent phylogenetic analysis was performed. Experimental inoculation of 3-week old chicken with the isolate resulted in virulent ND. Expression of cytokine mRNA levels in spleen of infected chicken at different time points correlated well with the clinical picture, gross and histopathological lesions. Result: To our knowledge this is the first evidence for the role of apparently healthy emu bird acting as a reservoir of velogenic AAvV-1 of subgenotype XIII 2.2 which proved to be highly virulent to chicken. This study further highlights the role of reservoir birds in AAvV-1 transmission and the need for adopting most realistic strategies in counteracting the disease.
El juego del círculo hamoiij
Authors: Pasquereau Jérémy , Perales Debora
Published: March 2021

Las mujeres seris juegan un juego tradicional llamado juego del círculo o hamoiij en cmiique iitom (el idioma seri). En él las mujeres se sientan (en el suelo o en sillas) alrededor de un círculo trazado en la arena, y en el que han dispuesto rodajas de cactus en grupos de cinco. Cada mujer tiene una vara decorada que coloca en el círculo. Las mujeres, por turnos, lanzan tiras de madera pintadas, que, al caerse, indican un número específico (igual que los dados). Cada una avanza su vara a lo largo del círculo, contando las rodajas, según el número de puntos que dieron las tiras de madera. El objetivo del juego es ‘matar’ a todas las otras varas.
La tutela transfronteriza de los derechos de la personalidad en la Unión Europea
Authors: Cerdeño Hernán Marina
Published: March 2021

Los litigios transfronterizos sobre vulneración de los derechos de la personalidad plantean importantes cuestiones jurídicas tanto en lo que respecta a la competencia internacional como al Derecho aplicable. La exclusión de esta materia del ámbito de aplicación del Reglamento Roma II relativo a la ley aplicable a las obligaciones extracontractuales confiere a la determinación de la competencia internacional una especial relevancia.El apartado 2 del artículo 7 del Reglamento Bruselas I bis establece una regla especial de competencia en materia delictual o cuasi delictual, en favor del Estado en cuyo territorio se haya producido o se pueda producir el daño. La determinación de ese lugar no siempre resulta sencilla, en especial si el medio utilizado para la lesión del derecho de la personalidad es internet. En el presente trabajo se analiza la prolífica y, a veces, controvertida jurisprudencia del TJUE sobre la determinación del lugar del daño ex artículo 7.2 del Reglamento Bruselas I bis y los nuevos criterios de competencia internacional creados por el Tribunal.
Acción de despido laboral, ley aplicable y cuestión calificatoria vinculada a la prescripción. A propósito de la Sentencia n.º 300/2020 del Tribunal Superior de Justicia de Madrid, Sala de lo Social
Authors: Álvarez Agoués Laura
Published: March 2021

La resolución judicial objeto del presente comentario resuelve de manera satisfactoria tres cuestiones claves vinculadas al ámbito del DIP: la calificación de la institución de la prescripción, la ley aplicable a un pleito de naturaleza laboral con dimensión transfronteriza y por último, la interacción entre los bloques normativos que entran en juego. En particular, la decisión judicial descarta la calificacióncomo procesal de la institución de la prescripción y deriva de ello de forma correcta la aplicación de la Lex Contractus (en este caso, la ley dominicana). Sorprende en todo caso la ausencia de toda referencia a la norma de conflicto aplicable al litigio resuelto, concretada en el Reglamento Roma I sobre ley aplicable a las obligaciones contractuales.
La ley aplicable al divorcio y la elegancia de la norma de conflicto. Apostillas a la sentencia del Tribunal de Justicia de la Unión Europea de 16 julio 2020
Authors: Carrascosa González Javier
Published: March 2021

Este trabajo realiza una lectura de los principios que rigen la determinación de la Ley aplicable al divorcio en el Reglamento Roma III: certeza legal, seguridad jurídica, costes conflictuales reducidos, lucha contra el Forum Shopping. Tales principios se estudian a través de la sentencia del TJUE de 16 julio 2020, C-249/19, JE vs. KF.
Una síntesis del Reglamento 650/2012: residencia habitual del de cuius, funciones judiciales, professio iuris. Comentario a la sentencia del Tribunal de Justicia (Sala Primera) de 16 de julio de 2020, Asunto c-80/19
Authors: Carrillo Pozo Luis F.
Published: March 2021

La sentencia de 16 de julio de 2020 responde a una amplia gama de cuestiones, desde los fundamentos mismos sobre los que se basa la aplicación del Reglamento 650/2012 (residencia habitual, carácter internacional de la sucesión) hasta las condiciones en las que se puede hablar de elección de tribunal y de la ley reguladora de la sucesión, pasando por el transcendental concepto de tribunal.En realidad, esta sentencia no pasará a la historia (o se limita a recoger la doctrina de pronunciamientos anteriores, o se limita a dejarlo todo en manos de los tribunales nacionales, o ambas cosas a la vez), pero tiene la virtud de servir de síntesis de las aportaciones previas.
El derecho a la información de las ADR de consumo tras el caso C-380/19
Authors: Catalán Chamorro María José
Published: March 2021

Los derechos de los consumidores han estado históricamente protegidos por la Unión Europea. Esto ha afectado fundamentalmente a los derechos sustantivos, pero poco se ha avanzado en el reconocimiento de derechos procesales que permitan a los consumidores obtener una tutela efectiva de sus pretensiones. Por ello, fue importante la entrada en vigor de la Directiva 2013/11 sobre resoluciónalternativa de litigios en materia de consumo. En este sentido, el TJUE y sus pronunciamientos proconsumidor mejoran la calidad de las transposiciones de las normas a las legislaciones nacionales y sus interpretaciones.
Compraventa internacional de mercaderías: efectos de la falta de comunicación en plazo de disconformidad de la parte receptora sobre la mercancía bajo el prisma de la Convención de Viena de 11 de abril de 1980
Authors: Gómez Ferreres Montse
Published: March 2021

Este trabajo analiza las cuestiones de Derecho Internacional Privado más controvertidas de la sentencia dictada por la sala de lo Civil del Tribunal Supremo número 2282/2020, de 6 de Julio, resolviendo el recurso de casación interpuesto por la mercantil española Ingeniería y Tratamiento de Valorización S.L., siendo parte recurrida la empresa alemana Econ Industries GMBH, en la que se plantea la interpretación de la Convención sobre las Naciones Unidas de 11 de Abril de 1980, sobre los contratos de compraventa internacional de mercaderías que, para el ejercicio de los derechos que reconoce al comprador, le impone la carga de comunicar al vendedor tanto la falta de conformidad con la mercancía recibida, como la resolución del contrato “en un tiempo razonable”.
Ámbito material del Reglamento Bruselas I bis, prácticas comerciales desleales (B2C) y acciones colectivas de cesación: comentario a la STJUE MOVIC BV (C-73/19)
Authors: Ruiz Martín Anna María
Published: March 2021

La STJUE Movic BV contiene cuestiones relativas al Derecho internacional privado europeo (DIPr) y al Derecho derivado de prácticas comerciales desleales y de consumo de la UE. Uno de sus aspectos más interesantes es la interpretación del concepto europeo de “materia civil y mercantil” del Reglamento Bruselas I bis. Un concepto que lejos de ser pacífico ha generado numerosas cuestiones de tipo prejudicial al Tribunal de Justicia de la Unión Europea por parte de tribunales y autoridades de los Estados miembros desde los orígenes de este (i.e.: Convenio de Bruselas de 1968) en todos instrumentos del DIPr patrimonial europeo. La materia objeto del litigio depende de ser caracterizada como materia “civil y mercantil” para entender que tiene cabida en el ámbito material del Reglamento Bruselas I bis. Para ello, los tribunales tienen que considerar dos elementos clave que el TJUE ha ofrecido en esta juris-prudencia sobre el concepto “materia civil y mercantil” y que en este asunto, se vuelven a traer a colación.De otra parte, en relación con el Derecho derivado de consumo, siendo parte de su contenido la regulación de las prácticas comerciales desleales contra los consumidores, el asunto Movic BV, también se hace eco de aspectos controvertidos cómo son es la naturaleza de las acciones transfronterizas de cesación atendiendo al complejo entramado y relación de normas de este acquis communautaire.
Reflexiones prácticas sobre la competencia judicial internacional y la filiación
Authors: Sánchez Cano María Jesús
Published: March 2021

A día de hoy, no existe en el Derecho Internacional privado europeo normativa alguna que regule la filiación por naturaleza, motivo por el cual los Tribunales españoles resolverán los con-flictos que se les planteen, aplicando nuestras normas de Derecho Internacional privado de producción interna. El presente trabajo examinará los problemas que suscita en la práctica la aplicación de los foros previstos en el art.22. quáter. d) LOPJ, del cual depende la determinación de la competencia judicial internacional de los Tribunales españoles en materia de filiación. A tal fin,  se tomará como punto de partida el Auto de la Audiencia Provincial de Oviedo de 13 de febrero de 2020.
R. Pisillo Mazzeschi. Diritto internazionale dei diritti umani. Teoria e prassi
Authors: Cataldi Giuseppe
Published: March 2021

Este artículo reseña: R. Pisillo Mazzeschi, Diritto internazionale dei diritti umani. Teoria e prassi, Torino, Giappichelli, 2020, 412 p. ISBN 978-88-9213-251-1.
Penataan Kewenangan Kelembagaan dan Pemberian Batasan Konstitusional sebagai Upaya Penataan Proses Legislasi Pasca Amandemen UUD NRI Tahun 1945
Authors: Hardenta Alif Duta , Pangestu Tariq Hidayat
Published: March 2021

Reformasi memberikan perubahan bagi ketatanegaraan Indonesia dengan menghasilkan amandemen Undang-Undang Dasar Tahun 1945 yang menegaskan sistem presidensiil. Namun, pada kenyataannya hasil amandemen tidak mencerminkan sistem presidensiil yang bercirikan pemisahan kekuasaan, hal ini dapat dilihat dalam besarnya kewenangan presiden dalam legislasi. Hal ini berdampak pada buruknya produk undang-undang yang dihasilkan oleh kekuasaan legislatif, baik secara materiil maupun formil. Penelitian ini mengevaluasi pula lemahnya kewenangan DPD dalam legislasi dan kekosongan internal checks and balances dalam legislatif serta problematika pelibatan Presiden. Selain itu, ditinjau pula permasalahan legislasi yang dinilai tidak taat asas pembentukan peraturan perundang-undangan yang baik, khususnya secara formil. Dengan mengggunakan metode penelitian yuridis-normatif, penulis akan mengevaluasi problematika legislasi dan mengusulkan solusi dengan merekonstruksi lembaga yang terlibat dalam legislasi serta berkelindan dengan penguatan DPD.
Kecelakaan Kerja yang Dialami Pekerja yang Sedang Dalam Keadaan Work From Home
Authors: Hutagalung Valerieo Ezra
Published: March 2021

Rumah milik pekerja bukan merupakan tempat kerja yang digunakan oleh pekerja untuk melakukan pekerjaan, tetapi sejak adanya pandemi COVID-19 di Indonesia, pekerja terpaksa untuk Work From Home. Berkaitan dengan perlindungan hukum pekerja terhadap kecelakaan kerja hanya berlaku di tempat kerja yang juga termasuk dalam ruang lingkup lingkungan kerja, sehingga perlu dilakukan penafsiran hukum bahwa rumah dalam keadaan Work From Home sebagai tempat kerja yang juga termasuk lingkungan kerja supaya terdapat perlindungan hukum bagi pekerja yang dalam keadaan Work From Home. Ada dua pihak yang bertanggung jawab terhadap kecelakaan kerja yang dialami oleh pekerja yang sedang dalam keadaan Work From Home yaitu pemberi kerja dan BPJS Ketenagakerjaan. Pemberi kerja bertanggung jawab dalam hal pencegahan terjadinya kecelakaan kerja dengan menerapkan Keselamatan dan Kesehatan Kerja (K3) dan BPJS Ketenagakerjaan bertanggung jawab apabila telah terjadinya kecelakaan kerja melalui program Jaminan Kecelakaan Kerja (JKK).
A Concise Proof of the Riemann Hypothesis Based on Hadamard Product
Authors: Alhargan Fayez
Published: March 2021

A concise proof of the Riemann Hypothesis is presented by clarifying the Hadamard product expansion over the zeta zeros, demonstrating that the Riemann Hypothesis is true.
Stakeholder Networking Analysis on Umbulan Water Supply Project: An Exploratory Study Combined With Meta-Analysis Identification Design
Authors: Trisliatanto Dimas , Adib Mohammad , Rustinsyah Rustinsyah , Kurniasih Dewi , Wijoyo Suparto , Pandin Moses Glorino Rumambo
Published: March 2021

The Umbulan Water Supply Project is categorized by the Shipping Infrastructure Acceleration Committee in the list of Accelerated National Strategic Projects through Presidential Regulation Number 3 of 2016 concerning the Acceleration of the Implementation of National Strategic Projects, targeted to operate in mid-2019. This is what will be the focus of the stakeholders of the Umbulan Water Supply Project. This study was to identifying and analyzing networks among stakeholders. Method: This study used a qualitative approach with exploratory methods combined with meta-analysis identification design Identification of stakeholder mapping in the context of early detection of stakeholder involvement in the implementation of the Umbulan Water Supply Project at various levels starting from the National, Provincial (East Java), District/City (Pasuruan, Sidoarjo, Surabaya, to Gresik), Sub-District (Winongan, Gondang Wetan, and Pohtjentrek). The conclusion of this study was based on in-depth interviews and focus group discussions in describing the determination of stakeholders which were divided into two, namely primary stakeholder and secondary stakeholder, and outline the result of the indicators analysis on the stakeholder network of Umbulan Water Supply Project.
Efficient Removal of Cr (VI) with Biochar and Parameters Optimized by Response Surface Methodology
Authors: Peng Hao , Guo Jing
Published: March 2021

A highly efficient reduction process of Cr (VI) with biochar was conducted in this paper. The results showed that nearly 100% Cr (VI) was reduced at selected reaction conditions: the dosage of biochar at m (C)/m(Cr) = 3.0, reaction temperature of 90 ℃, reaction time at 60 min and concentration of H2SO4 of 20 g/L, respectively. The reduction kinetics analysis demonstrated that the reduction of Cr (VI) fitted well with the pseudo-first-order model and the apparent activation energy was calculated to 40.24 kJ/mol. Response surface methodology confirmed that all the experimental parameters had positive effect on the reduction of Cr (VI). The influence of each parameter on the reduction process followed the order: dosage of biochar> Concentration of H2SO4 > Reaction Temperature > Reaction Time. This paper provided a versatile strategy for treatment of wastewater containing Cr (VI) and showed a bright tomorrow for wastewater treatment.
Mental Health, Greenness and Nature Related Behaviours in the Adult Population of Stockholm County during Covid-19-related Restrictions
Authors: Lõhmus Mare , Stenfors Cecilia U. D. , Lind Tomas , Lauber André , Georgelis Antonios
Published: March 2021

International data suggests that exposure for nature is beneficial for mental health and well-being. The restrictions related to Covid-19 pandemic have created a setting that allows us to investigate the importance of greenness exposure on mental health during a period of increased isolation and worry. Based on 2060 responses from an online survey in the Stockholm County, Sweden, we investigated: 1) weather the Covid-19 pandemic changed peoples’ life-style and nature-related habits, and 2) if peoples’ mental health differed depending on their exposure to greenness. Neighbourhood greenness levels were quantified by using the average Normalized Difference Vegetation Index (NDVI) within 50m, 100m, 300m, and 500m buffers surrounding the participant’s place of residence. We found that the number of individuals that reported that they visited natural areas “often” was significantly higher during the pandemic than before the pandemic. Higher levels of greenness surrounding one’s location of residence were in general associated with higher mental health/wellbeing and vitality scores, and less symptoms of depression, anxiety, and perceived and cognitive stress, after adjustments for demographic variables and walkability. In conclusion, the results from the present study provided support to the suggestion that contact with nature may be important for mental health in extreme circumstances.
A Review of Hybrid Automata Models
Authors: Besharati Mohammad Reza , Izadi Mohammad
Published: March 2021

In this paper, Hybrid Automata, which is a formal model for hybrid systems, has been introduced. A summary of its theory is presented and some of its special and important classes are listed and some properties that can be studied and checked for it are mentioned. Finally, the purposes of use, the most widely used areas, and the tools that provide H.A. Support are addressed.
Genomic Mapping in Detection of Vascular Disorders
Authors: Quazi Sameer , Capuzzo Arnaud , Malik Javid Ahmad
Published: March 2021

Term vascular dysfunctional refers to a wide spectrum of vascular abnormalities including pathogenesis of tumors, their proliferation and leading to malfunctioned conditions. The treatment of most of the vascular anomalies including peripheral arterial disease and cardiac disease is multi factor procedure which include the embolic therapy, laser-based treatments and coagulation are all plating important role in managing the disease associated with vascular breakdown. The research proposal defines the treatment and diagnosis procedures involved in treatment of vascular abnormalities with a deep emphasis on techniques, efficiency and complications resulted from various other procedure and use of mapping and sequencing techniques based on genetics of variants of selected genes PIk3CA which will ultimately be more effective.
JLGBMLoc: A Novel High-precision Indoor Localization Method Based on LightGBM
Authors: Yin Lu , Ma Pengcheng , Deng Zhongliang
Published: March 2021

Wi-Fi based localization has become one of the most practical methods for mobile users in location-based services. However, due to the interference of multipath and high-dimensional sparseness of fingerprint data, the localization system based on received signal strength (RSS) is hard to obtain high accuracy. In this paper, we propose a novel indoor positioning method, named JLGBMLoc (Joint denoising auto-encoder with LightGBM Localization). Firstly, because the noise and outliers may influence the dimensionality reduction on high-dimensional sparseness fingerprint data, we propose a novel feature extraction algorithm, named joint denoising auto-encoder (JDAE), which reconstructs the sparseness fingerprint data for a better feature representation and restores the fingerprint data. Then, the LightGBM is introduced to the Wi-Fi localization by scattering the processed fingerprint data to histogram, and dividing the decision tree under leaf-wise algorithm with depth limitation. At last, we evaluated the proposed JLGBMLoc on UJIIndoorLoc dataset and Tampere dataset, experimental results show that the proposed model increases the positioning accuracy dramatically comparing with other existing methods.
Multi-Factorized Semi-covariance of Stock Markets and Gold Price
Authors: Huang Jun , Huang Mei , Yang Lin , Shi Yun
Published: March 2021

Complex models have received significant interest in recent years and are being increasingly used to explain the stochastic phenomenon with upward and downward fluctuation such as the stock market. Different from existing semi-variance methods in traditional integer dimension construction for two variables, this paper proposes a simplified multi-factorized fractional dimension derivation with the exact Excel tool algorithm involving the fractional center moment extension to covariance, which is a complex parameter average that is a multi-factorized extension to Pearson covariance. By examining the peaks and troughs of gold price averages, the proposed algorithm provides more insight into revealing underlying stock market trends to see who is the financial market leader during good economic times. The calculation results demonstrate that the complex covariance is able to distinguish subtle differences among stock market performances and gold prices for the same field that the two variable covariance may overlook. We take the London, Tokyo, Shanghai, Toronto and Nasdaq as the representative examples.
Design of Realistic Mathematics Education Approach to Develop Students High-Order Thinking Skill in Online Learning
Authors: Budiyanto Aris , Pinta Deniyanti Sampoerno  , Makmuri Makmuri
Published: March 2021

High-level mathematical thinking skills are the main goal in learning mathematics. So far, the practice of learning in schools has not facilitated students to develop these abilities. PMRI (the Indonesian version of realistic mathematics education) is a learning approach that is oriented towards the students` ability to understand the realistic situations that can be imagined and integrated with the ability to understand concepts, use progressive mathematical models, interactivity and take advantage of student contributions are expected to improve students' abilities in learning mathematics. This study aims to determine the implementation of PMRI approach in improving high-order thinking skills of mathematics in class XI SMA Mutiara Bangsa 2 Tangerang on limit function through e-learning. This research was developed based on a research design that includes three, those are preliminary design, experiment, and retrospective analysis. This study was designed with five meetings using six research subjects. The subjects of this study consisted of six students who were selected based on their evaluation test and their activeness during learning process. The research instruments analyzed were formative and summative test results based on higher-order thinking skills, findings note, student questionnaires, and the hypothetical learning trajectory (HLT). The results obtained from the retrospective analysis show that the implementation of PMRI in learning and instruction of limit function is able to develop higher-order thinking skills of class XI students of SMA Mutiara Bangsa 2 Tangerang.
Pengaruh Model Brain Based Learning terhadap Kemampuan Koneksi Matematis Siswa SMA ditinjau dari Self-Regulated Learning
Authors: Sardi Ayu Lestari , Rahayu Wardani , Sampoerno Pinta Deniyanti
Published: March 2021

Penelitian ini bertujuan untuk mengetahui terdapat atau tidaknya pengaruh model Brain Based Learning terhadap kemampuan koneksi matematis ditinjau dari Self-Regulated Learning. Penelitian ini menggunakan metode quasi eksperimen dengan desain kontrol post-test kemampuan koneksi matematis. Populasi penelitian ini adalah seluruh siswa kelas X IPA di SMA Muhammadiyah Jakarta pada semester genap Tahun Ajaran 2019/2020 dengan sampel yang diteliti sebanyak 72 siswa. Teknik pengambilan sampel dengan cara cluster random sampling. Pengumpulan data dalam penelitian ini menggunakan instrumen kemampuan koneksi matematis. Sebelum data dianalisis, terlebih dahulu dilakukan uji prasyarat yaitu uji normalitas dengan menggunakan uji kolmogrov smirnov, dan uji homogenitas dengan menggunakan uji levene’s. Berdasarkan hasil analisis data yang menggunakan uji-t diperoleh  sebesar 4.603 dan  sebesar 1.994 yang mengakibatkan H0 ditolak pada taraf signifikan 0,05 dengan nilai effect size 1,4 yang tergolong tinggi. Oleh karena itu, hasil penelitian ini memiliki kesimpulan bahwa terdapat pengaruh model Brain Based Learning terhadap kemampuan koneksi matematis siswa ditinjau dari Self-Regulated Learning tergolong tinggi.
Upaya Meningkatkan Kemampuan Pemecahan Masalah dan Self-Concept Matematis dengan Pendekatan PMRI di SMP Daar En Nisa Islamic School
Authors: Nidia Rosita  , Rahayu Wardani , Makmuri Makmuri
Published: March 2021

Penelitian ini bertujuan untuk meningkatkan kemampuan pemecahan masalah dan self-concept matematis di SMP Daar En Nisa Islamic School kelas VIIIA. Penelitian ini merupakan penelitian tindakan kelas (action classroom research) dengan menggunakan model Kemmis and Mc Taggart. Subjek penelitian adalah siswi kelas VIIIA tahun pelajaran 2019/2020 yang berjumlah 27 orang. Penelitian tindakan kelas ini terdiri dari dua siklus, yang setiap siklus terdiri dari 4 tahapan yaitu:  perencanaan, pelaksanaan tindakan, observasi dan refleksi. Teknik pengumpulan data menggunakan observasi, wawancara, catatan lapangan, tes, dan dokumentasi. Tes awal yang dilakukan sebelum penelitian dilaksanakan, hasilnya didapatkan rata-rata skor kemampuan pemecahan masalah adalah 33,70 dan skor self-concept matematis sebesar 75,08. Hasil penelitian menunjukkan bahwa pada akhir siklus I terjadi peningkatan rata-rata skor kemampuan pemecahan masalah menjadi 43,40 dan skor  self-concept matematis menjadi 78,12. Pada akhir siklus II kembali terjadi peningkatan kemampuan pemecahan masalah  dari 43,40 menjadi 75,49 dan self-concept matematis dari 78,12 menjadi  80,33. Berdasarkan uraian di atas dapat disimpulkan bahwa pembelajaran dengan pendekatan PMRI dapat meningkatkan kemampuan pemecahan masalah dan self-concept matematis pada peserta didik kelas VIII A di SMP Daar En Nisa Islamic School Bogor.
Dissociation of a Femoral Intramedullary Magnetic Lengthening Nail During Routine Hardware Removal
Authors: Johnson Mitchell A. , Karkenny Alexa J. , Arkader Alexandre , Davidson Richard S.
Published: March 2021

Case:

A 15-year-old boy with a right femur length discrepancy secondary to infection underwent hardware removal 1-year status-post right femur osteotomy with placement of an antegrade intramedullary magnetic lengthening nail after successful lengthening of 4.2 cm. During hardware removal, dissociation between the proximal (outer) and distal (inner) components of the device was observed. The distal component was removed using an endoscopic pituitary rongeur after considering multiple possible techniques.

Conclusions:

In the event of nail disconnection during removal of an intramedullary implant, we recommend use of a long pituitary rongeur to retrieve the distal nail component.
Load and resistance factors for earth retaining, reinforced concrete hydraulic structures based on a reliability index (β) derived from the Probability of Unsatisfactory Performance (PUP) : phase 2 study
Authors: Ebeling Robert , White Barry
Published: March 2021

This technical report documents the second of a two-phase research and development (R&D) study in support of the development of a combined Load and Resistance Factor Design (LRFD) methodology that accommodates geotechnical as well as structural design limit states for design of the U.S. Army Corps of Engineers (USACE) reinforced concrete, hydraulic navigation structures. To this end, this R&D effort extends reliability procedures that have been developed for other non-USACE structural systems to encompass USACE hydraulic structures. Many of these reinforced concrete, hydraulic structures are founded on and/or retain earth or are buttressed by an earthen feature. Consequently, the design of many of these hydraulic structures involves significant soil structure interaction. Development of the required reliability and corresponding LRFD procedures has been lagging in the geotechnical topic area as compared to those for structural limit state considerations and have therefore been the focus of this second-phase R&D effort. Design of an example T-Wall hydraulic structure involves consideration of five geotechnical and structural limit states. New numerical procedures have been developed for precise multiple limit state reliability calculations and for complete LRFD analysis of this example T-Wall reinforced concrete, hydraulic structure.
Changes in the serum level of the trace elements in chronic renal
Authors: Dawood Mkarrem K. , Al-Alwachi Sabbah Naseer , Fathi Munther Mustafa
Published: March 2021

Were studied changes in the concentration of copper, iron and zinc in blood serum of one hundred patients with chronic kidney and treated dialysis blood were also measured the level of calcium kidney and phosphate Calciotropic in serum of these patients took samples of blood from these patients before and after treatment dialysis vessels as well as the statement of changes in those standards Alkimaahiatih Results were compared with twenty-five healthy people (control group)
Characteristics studies of anti total PSA antibody's binding with prostate
Authors: Al-Mudaffar Sami , Al-Salihi Jwan A.
Published: March 2021

the use of diffrent concectration of Na and Mg ions were shown to causes in increase in the bindings at oncentration
Corrosion inhidition of inconel(600) in sodium chloride solution by sodium sulphate
Authors: Farhan Ahlam M.
Published: March 2021

a porentioncsisteve has been carried out of the corrosion behavior of inconel(600) in chloride ions (Cl) over the tempreatures 293 over the temperatures 308K in both the dcacrated and the alloy
Some properties of the Osvillatory and nonoscillatory solutions of second order
Authors: Mohamad Hussain A. , Tawfiq Njlaa I. , Hassan Awatif A.
Published: March 2021

in this paper sufficient conditions of oscillation of all of nonlinear second order neutral differential eqiation and sifficient conditions for nonoscillatory soloitions to onverage to zero are obtained
Effects of salinity stress on seedling biomass, physiochemical properties and grain yield in different breeding wheat genotypes
Authors: Pour-Aboghadareh Alireza , Mehrvar Mohammad Reza , Sanjani Sara , Amini Ashkboos , Chaman-Abad Hamidreza Nikkhah , Asadi Ameneh
Published: March 2021

The salinity tolerance of 17 breeding wheat genotypes along with three local varieties was evaluated under control and salinity stress (160 mM NaCl) conditions. At the seedling stage, shoot and root dry weights, relative water content (RWC), membrane stability index (MSI), relative chlorophyll content (SPAD index), root and shoot Na+ (RN and SN), root and shoot K+ (RK and SK), root and shoot K+/Na+ ratios (RKN and SKN), root-to-shoot Na+ translocation (RTSN), root-to-shoot K+ translocation (RTSK), stomatal conductance (GS), transpiration rate (TE), and photosynthesis rate (PN) were measured. Moreover, the investigated genotypes were assessed in terms of grain yield across four saline regions during the 2018–2019 cropping seasons. Salinity stress caused a significant reduction in the RDW, SDW, PN, GS, TE, SK, RKN, SKN, RTSN, and RTSK, but resulted in increased RN, RK, and SN. The results of AMMI analysis of variance also indicated significant differences among test locations, genotypes, and their interaction effects. The PCA-based biplot revealed that grain yield strongly correlated with RKN and RK. Furthermore, the correlation among PN, GS, and TE traits was strong and positive and had a positive correlation with RWC, MSI, RDW, and SPAD index. Considering our results, RK and RKN were identified as useful physiological tools to screen salt tolerance at the early-growth stage. According to the ranking patterns obtained by the average sum of ranks method (ASR) and grain yield, we observed that genotype number G5 had considerable physiological potential at the early-growth stage and also responded well to soil salinity at the farm; thus this genotype can be promoted for commercial production.
Mechanical Enhancement of Cellulose Nanofibril (CNF) Films Through the Addition of Water-soluble Polymers
Authors: Forti Endrina Stefani , Awad Sami M El , Ng Xin Y , Cho Whirang , Schueneman Gregory T , Moon Robert J , Fox Douglas M , Youngblood Jeffrey
Published: March 2021

In this work, water-soluble polymers were screened through solution casting and polyvinyl alcohol (PVA) and poly(2-ethyl-2-oxazoline) (PEOX) were found as reinforcement agents for cellulose nanofibrils (CNFs) films. Mechanical property increases of 99% in elastic modulus, 93% in the ultimate tensile strength (UTS) and 134% in the work of failure (WOF) were reported for TEMPO-oxidized cellulose nanofibrils (TOCNF) with 0.44 mmol/g carboxylate groups and 15 wt.% PVA. PEOX had a higher elastic modulus increase of 113%, yet lower UTS and WOF increases were found at 63% and 28%, respectively. Additionally, increases in UTS and elastic modulus were also seen in mechanically fibrillated CNF and TOCNFs with higher carboxylate contents (1.5 mmol/g). The toughening mechanism was attributed to the formation of strong hydrogen bonding between the CNFs and the hydrophilic polymers added. The presence of such mechanisms was indirectly confirmed by tensile testing, zeta potential and rheology.
Integrating past variability in climate-driven Mediterranean fire hazard assessments for 2020-2100
Authors: Lestienne Marion , Vannière Boris , Curt Thomas , Jouffroy-Bapicot Isabelle , Hély Christelle
Published: March 2021

In the Mediterranean basin, Corsica (French island) harbours among the best-preserved Mediterranean forest ecosystems and its high biodiversity could be threatened by the climate and disturbance-regime changes due to the global warming. This study aims i) to estimate the future climate-related fire hazard in Corsica for the current century (2020–2100) based on two RCP scenarios (RCP4.5 and RCP8.5), and ii) to compare the predicted trends with the entire Holocene period for which fire hazard has previously been assessed. An ensemble of future climate simulations from two IPCC RCP scenarios has been used to compute the Monthly Drought Code (MDC) and the Fire Season Length (FSL) and to assess the level of fire hazard assessment. Here, we show that the MDC and the FSL would both strongly increase over the next decades due to the combined effect of temperature increase and precipitation decrease in the Corsica region. Moreover, the maximum Holocene FLS (7000 to 9000 years ago), will be reached (and even exceeded depending upon the scenario) after 2040. For the first time in the Holocene, we may be confronted to an increase in the number of fire-prone months driven by climate combined with many human-caused ignitions. This combination should increase the burned area from 15–140%. For the next 30 years, the game seems to be already played as both RCP scenarios resulted in similar increase in fire hazard intensity and duration. It is thus mandatory to reconsider fire-management and fire-prevention policy to mitigate the future fire risk, and its catastrophic consequences for ecosystems, population, and economy.
Molecular characterization of ER Stress sensor IRE1α and IRE1β and their expression analysis in response to different fatty acid in grass carp (Ctenopharyngodon idellus)
Authors: Chang Zhiguang , Yang Minghui , Ji Hong
Published: March 2021

Inositol-requiring enzyme 1 (IRE1) is the most evolutionarily conserved endoplasmic reticulum (ER) membrane protein. Here, we identified and analyzed two IRE isoforms (IRE1α and IRE1β) in grass carp ( Ctenopharyngodon idellus ). The coding sequences of IRE1α and IRE1β were 3096 and 2835 nucleotides, and they encoded proteins of 1031 and 944 amino acids, respectively. Each of the two IRE1s proteins had four PPQ domains, a transmembrane helix region, an S_TKc and a PUG domain, which were relatively conserved in comparison to mammals. qRT-PCR revealed that IRE1α was the highest in liver and brain, whereas the highest expression of IRE1β expressed was found in the hindgut, which may be closely related with their role. Moreover, we have compared the effect of saturated (palmitic acid, PA) , monounsaturated fatty acid (oleic acid, OA) and polyunsaturated fatty acids (Docosahexaenoic acid, DHA) on ER stress in CIK cells, and found that PA and DHA induced UPR-related gene expression in dose-dependent , and OA increased expression of IRE1α and decreased expression of IRE1β, ATF4 and ATF6 at lower doses. Additionally, our studies revealed that blocking IRE1α pathway using specific inhibitor 4μ8c, subsequently reversed PA-induced autophagy and inflammation, indicating the role of IRE1α in mediating PA-induced CIK cells. Taken together, the study demonstrated the IRE1α and IRE1β that likely have an important role in physiological processes induced by fatty acids in grass carp.
Effect of the turbulent biological tissues on the propagation properties of coherent Laguerre-Gaussian beams
Authors: Ebrahim Ahmed Abdulrab Ali , Belafhal Abdelmajid
Published: March 2021

In this paper, the effects of turbulent biological tissues (TBT) on the propagation properties of the coherent Laguerre-Gaussian (CLG) beams are studied. Based on the turbulence theory and using the power spectrum refractive-index model, the expression formulae of the average irradiance intensity and spreading properties of a CLG beam propagating in TBT are derived. The influence of propagation distance, beam orders, wavelengths and tissue turbulence parameters are then investigated numerically. It found that, the central dark zone of the circular/elliptical LG beams rises more rapidly as the propagation distance and the structural constant of the refractive index of the biological tissue increase and the beams become eventually more like Gaussian beams in the far-field under the influence of the turbulence biological tissues. Also, the numerical results proved that the effective beam spot radius increases as turbulence, wavelength, and propagation distance are increasing. Ultimately, the beams become circular under the influence of the turbulence of the biological tissue. As found that the effective beam spot radius along the x-axis becomes equal to that of the y-axis in high TBT which explain why an elliptical LG beam is converted into a circular one in higher structural constant of the turbulent tissue. Moreover, our results show that, the influence of the beam order m slightly greater than that of l on the beam spreading.
Continuous-time Predator-Prey-Like Systems of Non Linear Ordinary Differential Equations Linking Mosquito-Breeding Site Density to Community Action Under Temperature Effects
Authors: Ngwa Gideon A , Teboh-Ewungkem Miranda Ijang , Njongwe James A
Published: March 2021

A system of two first order nonlinear ordinary differential equations is used to model and theoretically investigate the dynamics of the formation of mosquito breeding sites in a uniform environment. The model captures the dynamic interplay between community action, climatic factors and the availability of mosquito breeding sites by interpreting the possible pathways and environmental processes leading to the formation of these breeding sites. The developed model is analysed using standard methods in nonlinear dynamical systems' theory. Our results show that it is possible to attempt the problem of the dynamics of formation of breeding sites by taking into consideration the level of human consciousness as measured through human response to community action. Different feedback response functions are used to excite the breeding site removal and community action. For the case where the response functionals are both constants, we identify an indicator function whose size can indicate whether in the long run, community action can lead to the removal and elimination of breeding sites near human habitats. Using a predictor-corrector procedure that fits real climatic data to a continuous periodic function, we demonstrate how climatic variables can be included in the model and how models for the time variation of temperature and precipitation in a given area can be constructed just by appropriately choosing the parameters of a sinusoidal function and then correcting the output using nonlinear least squares analysis. Numerical simulation results are used to complement our analytical results.
Assessing the effects of the Environmental Protection Tax Law on heavily polluting firms in China
Authors: Wen Huwei , Deng Weifeng , Guo Quanen
Published: March 2021

In 2016, China enacted a law on environmental protection tax (EPTL2016) to promote the transformation and upgrading of heavily polluting industries through tax leverage. Using the panel data of China’s listed companies, this study assesses the treatment effects of environmental protection tax law on the transformation and upgrading of heavily polluting firms by incorporating the intermediary role of the financial market. Empirical evidence shows that the EPTL2016 has significantly reduced the innovation investment and productivity of heavily polluting firms but has no significant effect on fixed-asset investment. We also find that the EPTL2016 reduces the supply of bank loans to heavily polluting firms and increases the value of growth options for private enterprises and the efficiency of the supply of long-term loans to heavily polluting firms. Although the environmental policy of EPTL2016 benefits the transformation and upgrading of heavily polluting industries in many aspects, it generally hinders the industrial upgrading because of the reduction of bank loans.
A Symbiotic Organisms Search Algorithm With Memory Guidance for Global Optimization Problems
Authors: ZHao Pengjun , Liu Sanyang
Published: March 2021

Symbiotic organisms search (SOS) algorithm is a nature-inspired meta-heuristic algorithm, which has been successfully applied to solve a large number of problems of different areas. In this work, a novel modified variant of SOS with a memory strategy and good-point set (GMSOS) is proposed to improve the properties of exploration and exploitation. For improving the population diversity and the search capability of the SOS algorithm, the good point set theory rather than random selection is used to generate the initial population, and the memory strategy is adopted in three phases of the SOS algorithm, which aims at maintaining the trade-off between exploration and exploitation effectively, and preventing the current best solution from getting trapped into local optima. The performance of the proposed version of SOS is tested on standard benchmark functions with different characteristics and real-world problems. The numerical and statistical results on these applications demonstrate the competitive ability of the proposed algorithm as compared to other popular algorithms available in the literature.