bluuebunny/crossref_metadata_2025 huggingface dataset:
Perencanaan Proyek Struktur Semi Gantry Crane Menggunakan Critical Chain Project Management
Authors: Faiizuddaroini M. , Nugroho Wahyu , Supriyadi Supriyadi , Nalhadi Ahmad
Published: November 2022

Project completion work has problems related to project completion not being on time, thereby increasing costs and resources. The work on the gantry crane structure includes projects that experience problems related to incompatibility between project planning and actual project work. This study aims to plan project activities by speeding up processing time and providing prevention strategies to minimize project delays. This study uses the critical chain project management method using the cut & paste method by 30%. The results showed the total buffer time was ten days, consisting of eight project buffer days and two feeding buffer days. The total time for the semi-gantry crane structure project has accelerated from 43 days to 33 days. Suggestions for prevention that can be done to complete the project according to the plan are adding project workers, adding tools or machines, and eliminating multitasking activities that cause project workers not to finish their work immediately.
Structure-oriented filtering in Crossplotting and k-means
Authors: Steklain André , Ganacim Francisco , Adames Márcio , Gonçalves João Luis , Oliveira Danian Steinkirch de
Published: November 2022

Several authors have proposed new techniques using multi-attribute analysis and machine learning. Studying the influence of different data treatments on such techniques is essential. We analyze the results by applying two clustering techniques, Crossplotting, and k-means, in filtered data. In particular, we use structure-oriented filtered seismic data before calculating seismic attributes. We use a migrated section of the Buzios field from the Brazilian pre-salt in the Santos Basin. We find that combining filtering and clustering techniques can improve salt identification.
Neural Network and Logical Fuzzy application in Brazilian Carbonate formations using conventional well logging, NMR and core data for permeability prediction
Authors: Carrasco Alfredo Moisés Vallejos , Natalino Clara do Nascimento , Almeida Higor Pimentel Esmeraldo de
Published: November 2022

Petrophysical information, such as permeability and porosity, is of great importance for oil reserve evaluation. Rock petrophysics measurements involve some degree of uncertainty because conventional well logging and nuclear magnetic resonance data are indirect measurements.  Data from core samples are more accurate, depending on the laboratory conditions, but this information belongs to a specific depth and does not represent an entire formation, especially when carbonate formations are present. Carbonate formations are characterized by their variation in porosity systems. Such porosity can be defined as intercrystalline, intergrain, moldic, vuggy and fracture and this parameter is linked with permeability values in different ways. In this work we compare the results obtained from the applications of neural network and fuzzy logic using conventional well logging, nuclear magnetic resonance data and information from core samples for permeability prediction. After using these two techniques, which can be considered efficient tools for uncertainty evaluation, a statistical coefficient called R2 shows better results when using logical fuzzy.
Rock physics modeling with mineralogical inversion in sandstone reservoir
Authors: Fernandes Fábio Júnior Damasceno , Teixeira Leonardo , Freire Antonio Fernando Menezes , Lupinacci Wagner Moreira
Published: November 2022

Reservoir characterization is a valuable tool for the oil and gas industry. A better understanding of the reservoir demands the integration of petrophysical properties and elastic parameters. This integration is commonly performed with the aid of rock physics models. The elastic properties of solid-phase components are important parameters for rock physics models calibration. In this paper, we use an adaptation of mineralogical inversion to estimate the volumes of quartz, feldspar, and clay minerals that incorporate previously calculated clay volume and porosity. Clay volume estimation is performed from neutron and bulk density logs. We chose this method due to the presence of feldspar minerals in the reservoirs. Our workflow consists of petrophysics properties estimation, mineralogical inversion, rock physics model calibration in Well A, and compressional-wave velocity estimation in Well B. The mineralogical inversion in Well A provided average volumes of 64% quartz and 16% feldspar and previously estimated 20% clay minerals. When applied to Well B, the calibrated soft-sand model is a better approximation for high porosity data points than the constant-cement model, and the error between original and estimated logs is about 2.9%, suggesting that the approach can be extended to other wells in the study area.
A correction factor for the resistivity log in gas reservoirs with low resistivity pay zone in the Poti Formation, Parnaiba Basin, Brazil
Authors: Calonio Lidia Waltz , Soares Caio , Ribeiro Luiza Fonseca , Nobre Jeniffer Alves , Lupinacci Wagner Moreira , Freire Antonio Fernando Menezes
Published: November 2022

The Parnaiba Basin, even being a new frontier basin, it’s already one of the most profitable for natural gas in Brazil. The shallow marine sandstones of the Poti Formation are the main gas reservoirs at Park of the Hawks. These reservoirs hold anomalously low resistivities which directly impacts water saturation calculations and leading to underestimations of their true potential as gas reservoirs. We propose a method for the characterization and mitigation of the problem and for the correction of the resistivity log based on the case study of well PGN-5, seeking to obtain more adjusted results for the reservoir evaluation. The methodology used is based on the integration data, where the main inputs were drill cuttings samples, well logs, gamma-spectral data and geochemical analyzes through X-rays fluorescence. We observed that the presence of pyrite and clay minerals are the causes of the low resistivities, still in the presence of gas-charged intervals, attested by crossover between density and neutron logs and through pressure gradients data. We propose a correction factor for the resistivity log in the anomalous low resistivity zone, allowing a new evaluation of the well, leading to a significant reduction in water saturation and a remarkable net pay gain.
Analysis of Seismic Refraction and Surface Wave Data for the Evaluation of Layers and Saturation of Solid Waste from a Landfill in Brasília, Brazil
Authors: Lima Victória Basileu de Oliveira , Guedes Victor José Cavalcanti Bezerra , Borges Welitom Rodrigues , Rocha Marcelo Peres , Cunha Luciano Soares da
Published: November 2022

The present work discusses the characterization of landfilled solid waste and saturated zones considering the response of P and S-wave velocities (Vp and Vs), Poisson ratio (υ), Young’s modulus (E) and shear modulus (G0), obtained from velocity models in an area located in the former Jockey Clube Controlled Landfill. The obtained Vp values ranged from 231 to 1,160 m/s, while Vs values range from 124 to 449 m/s. The calculated υ ranged from 0.11 to 0.4, while G0 and E ranged from 15 to 319 kPa and from 42 to 901 kPa, respectively. The values of G0 and E indicate that the landfilled material is poorly competent. The combined interpretation of Vp, Vs and elastic parameters allowed the definition of three main layers in the surveyed area and their respective distance from soil surface, defined as: 1) Civil construction residual material, of around 10 meters thick; 2) A solid waste layer, of around 18 meters thick, marked as a lower Vs and higher υ interval, possibly associated with saturated material; and 3) the estimated natural landfill terrain, below the depth of 28 meters, composed by the oxisol.
Borehole Effects on Coaxial and Coplanar Logs of Triaxial Tools in Laminated Formations with Anisotropic Shale Host
Authors: Carvalho Paulo Roberto de , Regis Cicero Roberto Teixeira , Silva e Silva Valdelírio
Published: November 2022

This paper studies the borehole effect in the triaxial induction logs within sand-shale laminated models with isotropic and anisotropic shale laminae with transverse isotropy. This study compares results from a 3D Vector Finite Element program (with borehole) and a 1D-Analytic code (no borehole). In comparison with the coaxial configuration, the vertical coplanar logs show a stronger horning effect in front of the laminated pack boundaries; a more intense skin effect to the conductivity media; and a more prominent oscillation within the laminated formation. In addition, feature changes (angular or smooth shapes) occur on the coaxial and coplanar responses as the dipping angle varies. The sensitivities of the logs to the anisotropy and borehole are opposite, i.e., for small angles where the coaxial is least sensitive, the coplanar is most sensitive, and for large angles where the coaxial is most sensitive, the coplanar is least sensitive. The main physical cause of these opposite behaviors to the anisotropy and borehole effect is the same: the weight of the horizontal magnetic component of the horizontal dipole contribution on the coaxial and coplanar dipping logs since it is the only one of the four magnetic field components that has anisotropy sensitivity and strongest skin effect.
3D Displacement and Stress Fields of Compacting Reservoir: Alternative Solutions
Authors: Barbosa Valeria Cristina F. , Oliveira Jr Vanderlei C. , Arelaro Andre D. , Borges Filipe Augusto S.
Published: November 2022

ABSTRACT. We have presented alternative solutions for the displacement and stress fields outside and inside of a 3D right rectangular prism under constant pressure. These solutions are obtained by integrating the well-known nucleus-of-strain solution over the volume of the prism. They are based on the similarity between the gravitational potential yielded by a volume source under a density variation and the thermoelastic displacement potential yielded by a volume source in a half-space under a pressure variation. This similarity enables the use of closed expressions of the gravitational potential and its derivatives. We use our solution for approximating the displacement and stress fields due to a reservoir with arbitrary shape and under arbitrary pressure changes. We discretized the reservoir as a grid of 3D right rectangular prisms juxtaposed in the horizontal and vertical directions. Each prism has homogeneous pressure; however, pressure variations among different prisms are allowed. This parametrization of the reservoir yields a piecewise constant distribution of pressure in the subsurface. We validate the resultant displacement and stress fields due to the reservoir by numerical simulations including a reservoir with arbitrary geometry and under arbitrary pressure distribution, based on a production oil field in offshore Brazil.
Reference Gravity Frame in Latin America
Authors: Blitzkow Denizar , Björkström Iuri Moraes , Matos Ana Cristina Oliveira Cancoro de , Silva Valéria Cristina , Guimarães Gabriel do Nascimento , Fonseca Junior Edvaldo Simões da
Published: November 2022

With the development of the ballistic gravimeter in the late 80s, the efforts to establish reliable absolute gravity reference around the world became a reality. The need for the so-called International Terrestrial Gravity Reference Frame (ITGRF[1]) to substitute the IGSN 71 (International Gravity Standardization Net 1971) is one of the demands of modern Geodesy. In that context, the Laboratório de Topografia e Geodesia, Escola Politécnica da Universidade de São Paulo (LTG/EPUSP), Brazil, started in 2013, with the acquisition of the A10 no 32 (A10-032) absolute gravimeter, a large number of campaigns to measure gravity acceleration in the states of São Paulo, Minas Gerais, Paraná and abroad. The gravimeter was purchased by Instituto Geográfico e Cartográfico (IGC), state of São Paulo. After eight years of operation under the coordination of the Centro de Estudos de Geodesia(CENEGEO) and with the support of different institutions, a total of five national Gravity Reference (GR) was established: Argentina, Brazil, Costa Rica, Ecuador and Venezuela. The present efforts are the selection of a set of local GR in the different countries of Latin America and a possible contribution to the ITGRF.[1] The ITGRS/F acronyms were approved by IAG JWG 2.1.1 in April 2022, replacing the former IGRS/F acronyms.
Chronological Study of Sediments from Alambari River, São José dos Campos, São Paulo State, Brazil
Authors: Bonotto Daniel Marcos , Massari João
Published: November 2022

Several studies in Nuclear Geophysics have adopted the 210Pb chronological method to determine sedimentation rates in hydrographic basins. In this paper, such technique was utilized to investigate sediments collected at Alambari River, located in the vicinity of the Henrique Lage Refinery (Revap - Petrobras), in the municipality of São José dos Campos, São Paulo State, Brazil. The study was carried out in order to observe the potential anthropic influences of the refinery on the Alambari River sediments. For the collected sediments, analysis including loss on ignition (LOI), grain size, chemical composition, and sedimentation rates/sediments age were carried out, in this case, adopting the 210Pb Constant Rate of Supply (CRS) model. The average sedimentation rate varied between 0.363 g/cm².year and 1.68 g/cm².year. Silica was identified as the main constituent in all three sediment cores analyzed in this study, with average concentrations of 41.63-82.58%. Silica correlated inversely with aluminum, iron and titanium, among other oxides. The X-ray fluorescence spectrometry also allowed identify the presence of elements that could be associated with petroleum and its derivatives, such as palladium, nickel and vanadium, possibly indicating the contamination of sediments of the Alambari River by effluents or leaks due to the refinery's activities.
Feminismo y lo común: Nuevas formas de lo político
Authors: Moreiras-Menor Cristina
Published: November 2022

La literatura de Belén Gopegui es lo que podríamos llamar, quizás con un término clásico pero no necesariamente obsoleto, literatura de compromiso. Un compromiso que, en ella, resulta fundamental a tres niveles: el primero, sería un pensamiento militante cuya responsabilidad se centra en la razón y la praxis del pensamiento de la izquierda; el segundo, como compromiso con la historia; y el tercero, como un sujeto que ella entiende como necesariamente colectivo. El compendio de estos tres compromisos es lo que parece, en realidad, constituir el germen de una escritora, de una intelectual que es además y fundamentalmente un sujeto político: militante de una izquierda materialista, abierta a una razón crítica ante el propio trabajo, productora de escritura como fuente de potencialidad transformativa de la realidad, cuyos relatos ponen en escena y en el presente (el momento histórico real) la historia de los que han quedado fuera de la historia. Este será el inicio de una reflexión que me llevará a plantear una cuestión acuciante en nuestro momento presente: ¿cuál es el papel de las escritoras para favorecer un pensamiento y una práctica feminista? ¿cuál es el papel del feminismo en el quehacer literario de las escritoras de izquierdas?

Basándome en estas inquietudes y en esta idea de intelectual y de sujeto comprometido "políticamente" con su quehacer de escritora, mi propuesta es presentar un ensayo dedicado a analizar cómo la literatura de algunas escritoras contemporáneas (Marta Sanz, Belén Gopegui, etc.) se proponen como parte de su cometido intelectual un intervención política y fundamentalmente feminista sobre la realidad; es decir, la escritora se erige en intelectual cuya misión es precisamente, desde la crítica, transformar la experiencia de la realidad contemporánea.
Representaciones y retos de las multitudes queer. La era post-género en el estado español
Authors: Castro Elena
Published: November 2022

En un momento de progresiva normalización y asimilación de las minorías sexuales a la norma parece políticamente incongruente seguir considerando a los gays y lesbianas asimilacionistas como un activismo radical (Preciado, "Entrevista 258) y hay que reconocer que éstos no son una minoría. Es en esta compleja lucha por el derecho a la integración sin el peligro de la asimilación en la que la palabra queer, como ha señalado Preciado, se ha convertido en un signo de resistencia a la normalización. El movimiento queer del siglo XXI es un movimiento post-homosexual, pero también post-gay. Es un movimiento post-identitario y post-género. Desde esta perspectiva, "queer (...) es una posición de crítica atenta a los procesos de exclusión y marginalización que genera toda ficción identitaria. El movimiento queer no es un movimiento de homosexuales ni gays, sino de disidentes de género y sexuales que resisten a las normas que impone la sociedad heterosexual dominante atento también a los procesos de normalización y de exclusión internos a la cultura gay: marginalización de las bolleras, de los cuerpos transexuales y transgénero, de los inmigrantes..." (Preciado, blog). Partiendo de esta nueva realidad el presente ensayo pretende reflexionar sobre cuál es la función de las representaciones culturales, como espacios en los que se materializa los discursos hegemónicos y sus posibilidades de subversión, así como de la teorización realizada en el seno de dichas multitudes, en promover esta agenda de activismo y representación de las multitudes queer, especialmente de "las otras mujeres" de la era post-género, y su impacto en la transformación de los estudios de género.
THE INFLUENCE OF RISK GOVERNANCE ON COMPANY PERFORMANCE
Authors: Melsyawati Rina , Gunawan Juniati , Anis Idrianita
Published: November 2022

Banking can give an impact on the economic sector's improvement; if the banking sector is healthy, a nation's financial industry can also be regarded as beneficial. The OJK study indicates a decrease in bank credit compared to the previous year when it reached 11.7 per cent. This study aims at elucidating the empirical evidence that risky governance affects the performance of financial and banking firms. Panel data regression was used to analyze the data, and the sample consisted of banks listed on the IDX from 2017-2020. The findings of this study demonstrated that risk governance at the enterprise level, board-level control, and risk governance are affecting firm performance. The effectiveness of this research is that Management-Level RGOV tends to decrease profitability because of the additional costs related to its implementation. Financial regulators may find this a helpful result as feedback to evaluate the effectiveness of regulation and possible future improvements.
YIELD TO MATURITY BOND: INTEREST RATE, INFLATION AND BOND RATING – EMPIRICAL RESEARCH ON BANKING SECTOR
Authors: Purnomo Listiya Ike , Wijaya Mila , Pratama Elfan
Published: November 2022

This research aims at determining the impact of interest rates, inflation and bond rating on bond yields to maturity. This type of exploration using quantitative exploration with an associative approach. purposive sampling was used for the selection of research samples. The population of this research is banking companies listed on the Indonesia Stock Exchange in 2016-2020. This disquisition used panel data regression analysis system. From the model test, a random effect model was attained as a model estimator. The result of this research is that interest rates, inflation, and bond rating together affect bond yields to maturity. Interest rate and inflation variables did not affect a bond's yield to maturity. The bond standing variable harms the bond's yield to maturity.
THE EFFECT OF EXCHANGE RATE AND INTEREST RATE ON SHARE PRICES IN THE MANUFACTURING SECTOR WITH INFLATION AS MODERATION
Authors: Ikhsan Sugiyanto , Sugito Putra Toufiq Agung Pratomo , Sugiyanto Sugiyanto , Dasuki Rima , Herdiansyah Endra
Published: November 2022

The movement of stock prices during the COVID-19 pandemic crisis has shown significant changes, this can be seen from the decline in the Composite Stock Price Index (JCI). This condition encouraged research in the field of macroeconomics to be able to understand this phenomenon. This research aims at examining the effect of macroeconomics on stock prices by using the manufacturing sector as the object of research. This research used the 2020 period, where in that period the JCI fell. The results showed that only the exchange rate had an effect on stock prices in the manufacturing sector, while inflation and interest rates had no effect on stock prices in the manufacturing sector. Inflation which is used as a moderating variable can moderate the effect of exchange rates and interest rates on stock prices in the manufacturing sector.
ENVIRONMENTAL DISCLOSURE INFORMATION: THE ROLE OF ENVIRONMENTAL CERTIFICATION AND FIRM SIZE
Authors: Indriastuti Maya , Chariri Anis , Fuad Fuad
Published: November 2022

Activities disclosure reflects corporate accountability, responsibility, and transparency to investors and other stakeholders. Therefore, the objectives of this study are to analyze and empirically test the effect of the board of directors and the environment certification at 36 mining companies listed on the Indonesia Stock Exchange within 2019-2021 with 108 annual reports. The results of multiple linear regression data processing showed that the board of directors could not increase the amount of environmental disclosure information. Meanwhile, environmental certification and firm size can increase the amount of environmental disclosure information. The implication of this research is companies need to disclose enviromental information in order to gain business trust from the public, investors and other stakeholders.
FORWARD-LOOKING INFORMATION DISCLOSURE AND FIRM VALUE IN THE PANDEMIC ERA
Authors: Widiastuti Harjanti , Utami Evy Rahman , Purnamasari Erna
Published: November 2022

The study investigates the forward-looking information disclosure (FLID), firm performance, and firm value during the COVID-19 pandemic. The population of this study was firms listed on the Indonesia Stock Exchange (IDX). The sampling methods used purposive sampling based on specific criteria. Our total sample was 478 observations. The data were analyzed based on multiple regressions utilizing the EViews program. The results of this study revealed that forward-looking information disclosure did not affect firm value. However, firm performance has a positive effect on firm value. Therefore, the interaction of firm performance and forwardlooking information positively affects firm value. During the pandemic, managers disclose more forward-looking information than before the pandemic.
Opredelenie prognosticheski znachimoj signatury DNK-metilirovaniya u pacientok s razlichnymi tipami raka molochnoj zhelezy
Authors: Калинкин А. И. , Сигин В. О. , Немцова М. В. , Стрельников В. В.
Published: November 2022

Rak molochnoj zhelezy (RMZH) — naibolee chasto diagnostiruemoe onkologicheskoe zabolevanie i odna iz vedushchih prichin smertnosti sredi zhenskogo naseleniya. Razrabotka prognosticheskih modelej s ispol'zovaniem mul'tiomiksnyh dannyh yavlyaetsya glavnoj cel'yu precizionnoj onkologii. Aberrantnoe metilirovanie DNK v RMZH predstavlyaet soboj informativnyj marker kancerogeneza. Nesmotrya na sushchestvuyushchie faktory prognoza RMZH, vvedenie markerov metilirovaniya pozvolit poluchat' bolee tochnuyu prognosticheskuyu ocenku. Cel'yu raboty bylo izuchit' signatury metilirovaniya DNK v razlichnyh podtipah RMZH dlya klinicheskih konechnyh tochek i kliniko-patologicheskih harakteristik pacientok. Dannye ob urovnyah metilirovaniya CpG-dinukleotidov (zondov) i klinicheskie harakteristiki obrazcov RMZH byli polucheny iz bazy dannyh The Cancer Genome Atlas Breast Cancer. S pomoshch'yu metoda odnomernoj regressii Koksa byli vybrany CpG-dinukleotidy, associirovannye s vybrannymi konechnymi tochkami. Metodom LASSO osushchestvlyali poisk stabil'nyh zondov, a dal'nejshee postroenie signatur i nezavisimost' klinicheskih harakteristik vypolnyali s pomoshch'yu mnogofaktornoj regressii Koksa. Diagnosticheskij i prognosticheskij potencial signatur ocenivali s pomoshch'yu metoda ROC-analiza i krivyh Kaplan–Majera. Pokazano, chto signatury otobrannyh zondov obladayut znachimym diagnosticheskim (AUC ot 0,76 do 1) i prognosticheskim (p < 0,05) potencialom. S pomoshch'yu dannogo podhoda udalos' identificirovat' 47 genov, svyazannyh s horoshim i plohim prognozom, iz kotoryh pyat' uzhe byli opisany ranee. Pri nalichii rezul'tatov shirokogenomnogo analiza DNK primenennyj issledovatel'skij podhod mozhno ispol'zovat' dlya izucheniya ne tol'ko molekulyarnogo patogeneza RMZH, no i dlya drugih zabolevanij.
The Contemporary Maqāṣid Sharia Perspective on Sexual Violence Provisions in the Indonesian Law Number 12 Year 2022
Authors: Juliansyahzen Muhammad Iqbal , Ocktoberrinsyah
Published: November 2022

The problem of sexual violence is in the spotlight of various groups because it has a multidimensional impact. Various efforts have been made to guarantee and protect the rights of victims. One of these efforts is the presence of Law Number 12 of 2022 concerning the Crime of Sexual Violence. This study aims to analyze the substance of the law and its compatibility with Sharia principles. This type of research is qualitative with a juridical-philosophical approach with the Jasser Auda’s perspective on Maqāṣid Sharia. The content analysis (content-analysis) is used to examine the content of the law in depth and its suitability with the theory. This study concludes that the concept of sexual violence contained in Law 12 of 2022 is in accordance with Maqāṣid Sharia, mainly in six respects, namely ḥifẓ al-dīn (the preservation of religion), ḥifẓ al-nafs (the preservation of the soul), ḥifẓ al’aql (the preservation of mind), ḥifẓ al-nasl (the preservation of offspring), ḥifẓ al-māl (the preservation of property), and ḥifẓ al-‘irḍ (the preservation of honor). This is based on the basic principles of Maqāsid Sharia which emphasizes morality, openness, development, humanity, and human rights.
Rationalization of Islamic Legal Considerations in Marriage Dispensation: A Lesson from Katingan, Central Kalimantan
Authors: Iswantoro Iswantoro , Tobroni Faiq
Published: November 2022

This paper finds the importance of paying attention to the psychological readiness of children as consideration in granting a marriage dispensation. Katingan Regency Local Regulation Number 9 of 2018 requires applicants for marital dispensation to check their psychological health. This study investigates how such requirements help judges formulate rational legal considerations in handling applications for a marriage dispensation. This study uses qualitative methods and analysis of the intertextuality of legal texts. Kasongan Religious Court Decision Number 39/Pdt.P/2022/PA.Ksn has taken advantage of the implementation of this provision. The judge rejected the application for a marriage dispensation because the results of the hospital's assessment showed that the prospective bride and groom were not psychologically prepared. This decision ruled out the reasons for the applicants on the pretext of only avoiding adultery. The legal considerations refer to the essential objective of Islamic law: the best benefit (maslahat) for children.
E-Learning for English Language Teaching in Higher Education Institutions in Saudi Arabia during Covid-19 Pandemic
Authors: Albatti Hamood
Published: November 2022

The study’s main aim is to examine E-Learning for English Language Teaching in Higher Education Institutions in Saudi Arabia during the Covid-19 Pandemic. The significance of the study is to investigate the level of adoption of e-learning for English Language teaching and practice, the impacts of the adoption of e-learning for English Language teaching and training, challenges associated with the adoption of e-learning for English Language teaching and practice, and the future of the use of e-learning for English Language teaching and practice in Higher Education Institutions in Saudi Arabia. The study’s central question is what are the impacts and challenges of E-Learning for English Language Teaching in Higher Education Institutions in Saudi Arabia during the Covid-19 Pandemic? The study used the semi-structured interview to obtain data from six English language lecturers in Saudi Arabia Universities selected using purposive and convenient sampling techniques. The data obtained were analyzed thematically. The study concluded that e-learning is the future of theoretical and practical courses such as English language teaching and practice in Higher Educational Institutions. This technology usage will benefit everyone involved; Higher Educational Institutions can save money and time while encouraging creativity. The study recommended that students and staff should be trained and re-trained on how to use digital technologies. Education institutions and government agencies should support students with computers and adequate software.
A review on the epigenetics modifications to nanomaterials in humans and animals: novel epigenetic regulator
Authors: Aldal’in Hammad K. , Radhi Khadija S. , Alazragi Reem , Abdelnour Sameh , Abukhalil Mohammad H. , Askar Ahmed M. , Khalifa Norhan E. , Noreldin Ahmed E. , Althunibat Osama Y. , Arif Muhammad , Abd El-Hack Mohamed E.
Published: November 2022

In the nanotechnology era, nanotechnology applications have been intensifying their prospects to embrace all the vigorous sectors persuading human health and animal. The safety and concerns regarding the widespread use of engineered nanomaterials (NMA) and their potential effect on human health still require further clarification. Literature elucidated that NMA exhibited significant adverse effects on various molecular and cellular alterations. Epigenetics is a complex process resulting in the interactions between an organism’s environment and genome. The epigenetic modifications, including histone modification and DNA methylation, chromatin structure and DNA accessibility alteration, regulate gene expression patterns. Disturbances of epigenetic markers induced by NMA might promote the sensitivity of humans and animals to several diseases. Also, this paper focus on the epigenetic regulators of some dietary nutrients that have been confirmed to stimulate the epigenome and, more exactly, DNA histone modifications and non-histone proteins modulation by acetylation, and phosphorylation inhibition, which counteracts oxidative stress generations. The present review epitomizes the recent evidence of the potential effects of NMA on histone modifications, in addition to in vivo and in vitro cytosine DNA methylation and its toxicity. Furthermore, the part of epigenetic fluctuations as possible translational biomarkers for uncovering untoward properties of NMA is deliberated.
Schiller on the Aesthetic Constitution of Moral Virtue and the Justification of Aesthetic Obligations
Authors: von Plato Levno
Published: November 2022

Friedrich Schiller’s notion of moral virtue includes self-determination through practical rationality as well as sensual self-determination through the pursuit of aesthetic value, i.e., through beauty. This paper surveys conceptual assumptions behind Schiller’s notions of moral and aesthetic perfections that allow him to ground both, moral virtue and beauty on conceptions of freedom. While Schiller’s notions of grace and dignity describe relations between the aesthetic and the moral aspects of certain determining actions, the ‘aesthetic condition’ conceptualises human beings from the perspective of aesthetic self-determinability. Schiller thereby provides a normative aesthetic standard that not only affects the moral nature of our motives and actions, but also of what we, as human beings, want to and should be conceived of in the first place. As I argue in this paper, considering this aesthetic self-determinability from a moral perspective results in an aesthetic constitution of moral virtue, which in turn justifies aesthetic obligations. Schiller thereby merges the perfections of the two normative domains for an extended anthropological conception of aesthetically infused notion of moral virtue while assuring the conceptual autonomy of each normative domain. Giving aesthetic demands a practical normative role by partly constituting moral virtue and thereby still maintain their aesthetic normative source is a move that opens up many resources for current research on the interactions between various normative demands, such as aesthetic reasons for moral or legal judgements and action, aesthetic obligations or weighing varying sources and elements of normative authority and hegemony against each other.
Ethical Issues on Musical Appropriation
Authors: Puy Nemesio García-Carril
Published: November 2022

This paper aims to shed light on the question of whether musical appropriation is ethically unobjectionable. James Young (2021) has recently advanced a position on this topic, according to which, whereas the appropriation of a whole work is uncontroversially non-permissible, the appropriation of parts of a work is usually permissible. He grounds this view in ontological matters and in a criterion of fair use in terms of economic harm to the source work’s composer. I argue that, pace Young, we cannot make general ethical claims about musical appropriation because their truth is sensitive to the musical genres that the involved works belong to. First, I clarify the scope of musical appropriation by means of considerations on musical practices and ontology. This will reveal that versions and covers are not genuine cases of musical appropriation. In a second step, I consider a specific kind of musical appropriation: using the first measures of a source work as the first measures of a secondary work. I show that, even if we assume Young’s ontological framework and his criterion on fair use, the instances of this kind of musical appropriation count as fair or unfair depending on the musical genres of the involved works due to their normative implications for the composition and appreciation of those works.
A Comparative Study for Outlier Detection Methods in High Dimensional Text Data
Authors: Park Cheong Hee
Published: November 2022

Outlier detection aims to find a data sample that is significantly different from other data samples. Various outlier detection methods have been proposed and have been shown to be able to detect anomalies in many practical problems. However, in high dimensional data, conventional outlier detection methods often behave unexpectedly due to a phenomenon called the curse of dimensionality. In this paper, we compare and analyze outlier detection performance in various experimental settings, focusing on text data with dimensions typically in the tens of thousands. Experimental setups were simulated to compare the performance of outlier detection methods in unsupervised versus semi-supervised mode and uni-modal versus multi-modal data distributions. The performance of outlier detection methods based on dimension reduction is compared, and a discussion on using k-NN distance in high dimensional data is also provided. Analysis through experimental comparison in various environments can provide insights into the application of outlier detection methods in high dimensional data.
Feature Map Augmentation to Improve Scale Invariance in Convolutional Neural Networks
Authors: Kumar Dinesh , Sharma Dharmendra
Published: November 2022

Introducing variation in the training dataset through data augmentation has been a popular technique to make Convolutional Neural Networks (CNNs) spatially invariant but leads to increased dataset volume and computation cost. Instead of data augmentation, augmentation of feature maps is proposed to introduce variations in the features extracted by a CNN. To achieve this, a rotation transformer layer called Rotation Invariance Transformer (RiT) is developed, which applies rotation transformation to augment CNN features. The RiT layer can be used to augment output features from any convolution layer within a CNN. However, its maximum effectiveness is shown when placed at the output end of final convolution layer. We test RiT in the application of scale-invariance where we attempt to classify scaled images from benchmark datasets. Our results show promising improvements in the networks ability to be scale invariant whilst keeping the model computation cost low.
Android-Based Learning Media Design with Contextual Learning to Develop Problem-Solving Skills
Authors: Yani Ahmad , Prihatin Iwit , Hodiyanto Hodiyanto , Sumiati Sumiati
Published: November 2022

This study objective is to show that android-based learning media design with contextual learning is valid, practical, and effective in developing mathematical problem solving skills. The research method used is Research and Devolopment. It’s design in this study is 4-D development model consisting of 4 development stages: define, design, develop, and desseminate. The subjects of this study consisted of development subjects (validators) and field trial subjects (a private senior high school in Pontianak, Indonesia). Data collection tools used were validation sheets, questionnaires and mathematical problem solving skill tests. The data analysis technique used descriptive statistics. This study showed that android-based media with contextual learning content was valid, practical and effective in developing mathematical problem-solving skills. In addition, Android-based learning media with contextual learning content could be used as an alternative in learning during Covid 19.
Students' Mathematical Literacy on The Performance of PISA Questions: What Is Gender Correlation?
Authors: Lanya Harfin , Zayyadi Moh , Sulfiah Sitti Karimah , Roziq Abdul
Published: November 2022

Descriptive research with a qualitative approach method is used because it is accordance with the research objectives, namely to describe students' mathematical literacy towards the performance of the PISA questions in terms of gender. The subjects in this study were two students that 1 male and 1 female in the high math ability of category in grade 9 of junior high schools. Subjects were selected by purposive sampling by giving a mathematical ability test to 25 students to see their mathematical abilities, then also taking into account the mathematics teaching teacher, two students were obtained as research subjects in accordance with the purpose of the study, namely to describe students' mathematical literacy based on gender, especially students with high mathematical abilities.The instrument used was a mathematical ability test and a mathematical literacy test as well as an interview guide as research data. Based on data analysis, there is an influence of gender on students mathematical literacy level. Female’s mathematical iteracy is better than male’s mathematical literarcy, so there needs to be efforts to improve learning from both teachers and schools so that there are no longer differences in abilities between male and female, and gender does not affect mathematical literacy.
Profile of Student Academic Procrastination Behavior in Problem Solving and Mathematical Digital Literacy
Authors: Agustin Aidha Rosalia , Winarso Widodo
Published: November 2022

The phenomenon of procrastination behavior in problem-solving and mathematical digital literacy still occurs among students. This study aimed to analyze the profile of students' academic procrastination behavior in problem-solving and mathematical digital literacy-purposive sampling technique involving 19 students of one junior high school in Indonesia. Academic procrastination behavior is obtained through qualitative research with a case study approach using the Tuckman Procrastination Scale (TPS) instrument, digital literacy scale, mathematical problem-solving ability tests, and semi-structured interviews as well as data analysis with four steps of research, namely data collection, data reduction, data presentation, and concluding. Most of the students (84.2%) experienced academic procrastination in solving mathematical problems and mathematical digital literacy (21%). There are six kinds of problem-solving and mathematical digital literacy student profiles in the high, moderate, and low category.
The Relationship between Perceptions of Online Learning and Self-Regulation of Mathematics Education Students
Authors: Siregar Hesty Marwani , Solfitri Titi , Siregar Syarifah Nur
Published: November 2022

Students' perceptions of learning influence the achievement of learning objectives. With the current online learning, students need to have good self-regulation to obtain excellent learning outcomes. Therefore, this study aims to examine the relationship between perceptions of online learning and the self-regulation of Mathematics Education students during the COVID-19 pandemic. The subject of this research is 121 students in semesters 2, 4, and 6 of the Mathematics Education Program in One University in Indonesia. Students in that semester are students who have experienced both face-to-face lectures and online lectures. To collect data in the study, researchers use questionnaires. This study uses descriptive statistical and quantitative analysis techniques. The results showed that student perception of online learning was correlated to student self-regulation during the COVID-19 pandemic (r=0.545 or moderate correlation). It means when students have a good perception of online learning, their self-regulation tends to be good, vice versa. Thus, one way to improve student self-regulation is by increasing student perceptions of online learning.
Pythagorean Theorem Concept Image in Junior High School: An Analysis in The Online-Based Learning
Authors: Jatisunda Mohamad Gilar , Suciawati Vici , Nahdi Dede Salim
Published: November 2022

The concept image comprises all the cognitive structures in an individual's mind connected with a specific notion. However, if the learning situation is not relevant to help students construct knowledge and provide meaningful experiences, it will affect their concept image. This study aims to examine the concept of the image of the Pythagorean theorem during online-based learning. The research is a qualitative approach, and the method is phenomenological to understand the meaning for the participants of their concept image. Initially, this study enrolled 66 students. Two students were selected as research subjects and acted as resource persons to provide adequate contextualization based on students who answered right and wrong. Data collection combines data from the outcomes of testing the Pythagorean theorem test, interviews, and literature studies. The data analysis technique employed is Interpretative Phenomenological Analysis (IPA). There are six categories of student concept image. Based on in-depth interviews with two students who answered correctly and incorrectly, students were given inconsistent meanings of the Pythagorean theorem due to the learning situation to improve students' understanding of the subject.
The Effect of Interactive Multimedia-Based Learning on Students’ Mathematical Critical Thinking Ability in the Course of Structure Algebra
Authors: Angraini Lilis Marina , Nurmaliza Nurmaliza
Published: November 2022

The critical thinking ability is fundamental in learning mathematics so it must be possessed by students as prospective teachers. In fact, the students' mathematical critical thinking ability is still relatively low. In this case, one of the causes is the change in learning system from face-to-face to online learning. One effort that can be done to overcome this issue is to apply interactive multimedia-based learning. Current research was further conducted in this matter, aiming to improve students' mathematical critical thinking ability through interactive multimedia-based learning to support online learning. This quantitative research (quasi-experimental) was carried out by involving prospective mathematics teacher students enrolling in the algebraic structure course in 2021/2022 at Universitas Islam Riau (UIR) as the experimental class and prospective mathematics teacher students at Universitas Pasir Pengaraian (UPP) as the control class. The data were further collected through a mathematical critical thinking ability test which were further analyzed through statistical tests. Based on the results of the t-test, there was an increase in students' mathematical critical thinking ability who received a learning process using interactive multimedia.
Characterizing Academic Engineering Research Groups
Authors: Marques Eduardo , Carbas Ricardo , DA SILVA Lucas
Published: November 2022

Academic research is a key activity of higher learning institutions, where the knowledge, skills and capabilities of the staff are directed towards scientific activities. The case of academic engineering research groups is quite particular, as they must perform academic research work but still consistently work with industrial partners in problem-solving research activities. Although they appear to be distinct, these aspects are interconnected and combining impactful research work and academic training is highly advantageous to group performance. This paper studies the operation of academic engineering research groups, starting with a literature review on the subject, followed by an analysis of a case study. The target of the case study is the Advanced Joining Processes Unit, part of the Institute of Science and Innovation in Mechanical and Industrial Engineering and the Faculty of Engineering of the University of Porto, a leading research unit in mechanical engineering, performing research on advanced joining processes. The main lesson drawn is that to achieve lasting success and significant impact on the scientific community and society, a research group must operate with clear and result-oriented leadership, able to provide a work environment with well-defined goals, and which is consistently working towards knowledge generation and dissemination.
Comparación de uno y dos arietes hidráulicos en paralelo con suministro vertical-radial
Authors:   Universidad del Valle, Cali, Colombia, del Risco Moreno Efraín , Muelas-Hurtado Ruben D. ,   Universidad del Valle, Cali, Colombia; Instituto de Ciencias Físicas, Cuernavaca, Morelos, México, Acosta P. Esnel A. ,   Universidad del Valle, Cali, Colombia
Published: November 2022

Mediante datos experimentales se analiza y compara el comportamiento de uno y dos arietes hidráulicos en paralelo, con y sin bajante (adición a la conducción de entrega), y suministro descendente vertical-radial. El estudio se hizo en un circuito hidráulico configurable para que esos dispositivos operen de una u otra forma a altura de entrega constante y altura de suministro variable. Con cada altura de suministro se midieron los caudales suministrados y bombeados por los arietes hidráulicos, y la presión en la tubería de impulsión, cerca de cada ariete, en la cámara de aire y en la tubería de entrega. Esta información permitió comparar por primera vez el desempeño de arietes hidráulicos funcionando solos o en paralelo mediante el análisis de caudales, presiones, frecuencia del golpe y eficiencia de los dispositivos. Como las bombas radiales, los resultados indican que dos arietes hidráulicos en paralelo entregan más que uno, pero menos que la suma del caudal bombeado por cada uno con descarga independiente. En el rango de alturas de suministro ensayado la frecuencia del golpe de ariete y el caudal bombeado crecen con la altura de suministro, como se reporta en otros estudios. No obstante, el resultado más destacado es el efecto del bajante porque incrementa varias veces el caudal bombeado, al aumentar la frecuencia del golpe de ariete. Esta investigación impulsa el desarrollo de un sistema de múltiples arietes hidráulicos con suministro común y descargas en paralelo o individuales, para bombear más que con los diseños actuales.