bluuebunny/crossref_metadata_2025 huggingface dataset:
Penerapan Metode Topsis Pada Peningkatan Kinerja Karyawan
Authors: Palasara Nico Dias , Baidawi Taufik
Published: October 2020

AbstrakHasil dari kinerja karyawan dapat dijadikan sebuah peluang untuk para pegawai dan perusahaan dalam melihat kemampuan serta potensi dari sisi internal. Dari hasil tersebut perusahaan dapat mengetahui dan melihat tingkat kinerja dari seluruh karyawan yang ada. Dengan standar penilaian tingkat kinerja karyawan yang sudah dibuat oleh perusahan sebanyak 14 kriteria. Namun, keputusan akhir biasanya melibatkan penilaian manusia yang besar. Kekurangan penilaian tanpa adanya metode pendukung keputusan maka seperti penilian  tradisional, metodenya adalah manusia yang dikenal rentan terhadap bias, meskipun pimpinan yang lebih berpengalaman namun ada penilaian yang subjektif. Maka dari itu penulis memasukkan metode sistem pendukung keputusan agar penilaian yang dihasilkan dapat memberikan nilai objektif. Maka penulis mencoba mengambil sebuah metode TOPSIS yang diharapkan dapat menyelesaikan dan memberikan sebuah solusi dari permasalahan yang ada. Topsis menggunakan indikator kriteria dan variable alternatif sehinga dapat membantu untuk menentukan keputusan, komputasinya efisien, perhitungan komputasinya lebih efisien dan dan cepat, mampu dijadikan sebagai pengukur kinerja alternatif dan juga alternatif keputusan dalams sebuah bentuk output komputasi yang sederhana, dan dapat digunakan sebagai metode pengambilan keputusan yang lebih cepat. Keywords: TOPSIS, Kinerja Karyawan, Pendukung Keputusan AbstractThe results of employee performance can be used as an opportunity for employees and companies to see their internal capabilities and potential. From these results the company can find out and see the level of performance of all existing employees. With a standard assessment of the level of employee performance that has been made by the company as many as 14 criteria. However, the final decision usually involves a large human assessment. Lack of assessment without decision support methods, such as traditional assessment, the method is that people are known to be vulnerable to bias, even though the leaders are more experienced but there are subjective judgments. Therefore the author includes a decision support system method so that the resulting assessment can provide objective value. So the author tries to take a TOPSIS method which is expected to solve and provide a solution to the existing problems. Topsis uses alternative criteria and variable indicators so that it can help to determine decisions, efficient computation, computation calculations are more efficient and fast, able to be used as an alternative performance gauge and also an alternative decision in a simple form of computational output, and can be used as a decision making method faster. Keywords: TOPSIS, Employee Performance, Decision Support
Sistem Pendukung Keputusan Kelayakan Pemberian Kredit Dengan Metode TOPSIS
Authors: Mubarok Ade , Suherman Himam Dwipratama , Ramdhani Yudi , Topiq Salman
Published: October 2020

Koperasi syariah BMT ItQan merupakan salah satu koperasi dengan pengelolaan secara syariah, menyediakan produk simpanan, pembiayaan dan jasa keuangan syariah. Sistem pembiayaan yang diterapkan di Koperasi syariah BMT ItQan ini masih secara manual dalam prosesnya. Koperasi memberikan pembiayaan kepada anggotanya dengan ketentuan kriteria-kriteria, dimana proses penilaian kriteria masih silakukan secara manual, sehingga keputusan yang dihasilkan masih kurang efektif dan akurat karena terkadang ada beberapa kriteria yang tidak ikut dipertimbangkan pada saat proses penilaian. Penggunaan Sistem Pendukung Keputusan dapat memudahkan pihak koperasi dalam pengambilan keputusan pemberian pembiayaan. Sistem Pendukung Keputusan ini dibuat menggunakan metode TOPSIS (Technique For Orders Reference by Similarity to Ideal Solution). Sistem Pendukung keputusan ini dibuat menggunakan bahasa pemrograman PHP dengan tools yang digunakan adalah Sublime Text 3 dan MySql untuk database yang menggunakan tools XAMPP. Hasil dari penelitian ini adalah sistem pendukung keputusan kelayakan pembiayaan yang dibangun sebagai alat bantu untuk penentuan kelayakan pembiayaan.
“I just trust what Google says, it’s the Bible”: Exploring young, Black gay and other men who have sex with men’s evaluation of sexual health information sources in Toronto, Canada
Authors: Lee-Foon Nakia K. , Logie Carmen H. , Siddiqi Arjumand , Grace Daniel
Published: October 2020

While sexual health literature identifies youths’ sexual health information sources and its impact on their sexual practices, little is known about the way youth evaluate the credibility of this information. This knowledge gap is significant among young, Black gay and other men who have sex with men (YBGM) who belong to intersectional populations disproportionately impacted by HIV and other STIs. We conducted a qualitative study using constructivist grounded theory to explore YBGM’s approaches to evaluating sexual health information sources’ credibility. Intersectionality and the socioecological model informed our analysis. We explored connections between social locations (e.g., race, sexual orientation) and socio-ecological environments and how their impact shaped YBGM’s evaluation of sexual health information. Findings revealed evaluation strategies varied by source: friends, the internet and healthcare providers. Friends’ information was deemed credible if they were older, shared social locations and provided embodied testimonials. Testimonials mirrored oral-traditions specific to Black populations where oral narratives help disseminate sensitive information in a culturally relevant way. Website selection was informed by YBGM’s social locations and ranged from being implicitly trusted to assessed by its association with established healthcare organizations. Many participants’ acceptance of healthcare providers’ information revealed patient-client power imbalances and a perception that providers’ actions reflected their institutions’ sexual health policies. Findings highlight a need for sexual health services to create culturally effective ways to disseminate information that accounts for the histories, contexts, and approaches YBGM use to identify credible sources of sexual health information.
Mechanical bonding in cold roll-cladding of tri-layered brass/steel/brass composite
Authors: Vaseghi Majid , Zand Hossein , Sameezadeh Mahmood
Published: October 2020

In this paper, brass/steel/brass clad-composite was fabricated using a cold roll-bonding process. Composite sheets were roll-bonded at reduction ratios between 37 and 72% at room temperature from strips of 150 mm in length and 30 mm wide, in one pass without lubrication. The threshold deformation for successful bonding was at a thickness reduction of 48% and peel strengths of the bonds were measured to be approximately 12 N cm-1, and it was found to escalate with an increase in the rolling reduction. The optimum reduction in thickness was ~66% wherein the peel strength was ~33 N cm-1. Various techniques such as optical and electron microscopy were implemented to analyze and investigate the effects of the reduction in thickness and the joining mechanism. The results showed that an increased reduction in thickness in rolling leads to an increase in the joining strength. Furthermore, increasing the brass plate thickness negatively affects the joining strength. A Cu peak on the peeled-off steel surface and the presence of Fe on the peeled-off brass surface strongly suggest that the major bonding between brass and steel was mechanically induced metallurgical bonding.
The influence of multi-pass friction stir processing on microstructure and sliding wear behavior of Cu/ZrO2 surface composite
Authors: Rabiezadeh Amin , Ghafaei Saman
Published: October 2020

In this study, copper/ZrO2 surface composites were produced using nano-particles via friction stir processing in order to enhance surface tribological properties. The present research aimed to generate copper matrix composites and analyze the effect of processing parameters on the evolving microstructure, microhardness, and wear-resistance behavior. It is worth noting that the processed composite layer had more homogeneity in the four-pass process. In comparison to the base metal and non-powder samples, it had higher mechanical characteristics. Based on the results, the highest recorded hardness, approximately 288 HV, was found in a four-pass state with powder. Remarkably, it showed a double peak compared to 80 HV in the base metal. The lowest friction coefficient of four-passes with the powder sample was about 0.47, which showed a significant efficiency in comparison to the friction coefficient of base metal that was about 0.81.
Pengembangan Bahan Ajar Materi Prisma Berbasis Android untuk Pembelajaran Berbasis Masalah di Kelas VIII
Authors: Mitha Frilia  , Hapizah  , Susanti Ely , Scristia Scristia
Published: October 2020

Perkembangan teknologi di era industri 4.0 membuat perubahan pada sistem pendidikan. Sistem pendidikan telah berubah menjadi lebih modern dengan penggunaan teknologi yang dipakai pada proses pembelajaran. Penelitian pengembangan ini bertujuan untuk menghasilkan bahan ajar yang valid dan praktis untuk pembelajaran berbasis masalah dikelas VIII dengan objek penelitiannya ialah bahan ajar berbasis android. Desain penelitian yang digunakan adalah model pengembangan ADDIE meliputi (1) analisis, (2) desain dan (3) pengembangan. Pengumpulan data menggunakan lembar validasi, observasi dan angket. Kelayakan bahan ajar ditentukan oleh ahli materi dan ahli media. Data hasil penelitian ini dianalisis dengan menggunakan metode deskriptif kuantitatif. Hasil penelitian menunjukkan bahwa bahan ajar sudah valid dilihat dari hasil validasi dan one-to-one sedangkan kepraktisan pada bahan ajar dilihat dari hasil data observasi dan angket, pada hasil data observasi didapatlah rata-rata 86% yang terkategori sangat praktis dan pada hasil data angket didapatlah rata-rata 86,33% yang terkategori sangat praktis sehingga dapat disimpulkan bahwa bahan ajar berbasis android pada materi prisma untuk pembelajaran berbasis masalah dikelas VIII sudah dikategorikan valid dan praktis.
Pengembangan Soal untuk Mengukur Higher Order Thinking Skill (HOTS) Siswa
Authors: Suhady Wandy , Roza Yenita , Maimunah Maimunah
Published: October 2020

Tujuan dari penelitian ini adalah menghasilkan instrument soal HOTS yang valid untuk dapat mengukur keterampilan berpikir tingkat tinggi siswa. Penelitian ini merupakan penelitian pengembangan dengan menggunakan model tessmer dengan tahapan analisis, perancangan, pengembangan, formatively evaluate, Summatevely Evaluate. Instrumen yang digunakan adalah angket dan tes. Teknik analisis data menggunakan software anates. Hasil dari penelitian ini adalah instrumen soal yang valid dari aspek materi dengan nilai 3,1, konstruksi dengan nilai 3,3 dan bahasa dengan nilai 3,3.
On the semantic history of selected terms of endearment
Authors: Grząśko Agnieszka
Published: October 2020

The present paper attempts to discuss the semantic history of a handful of terms of endearment (aka pet names, sweet talk, affectionate talk, soft words, terms of affection or sweet words) and the role of the cognitive mechanisms in the changes of their meaning. We focus the reader’s attention on a few lexical items which represent such mechanisms as foodsemy (e.g. honey, sugar), which seems to be one of the most prolific ones, plantosemy (pumpkin) or zoosemy (pet). Furthermore, we trace the semantic development of terms which from the beginning of their existence have been employed as pet names (sweetheart), words which are no longer endearments, because they underwent the process of meaning amelioration or pejoration (mopsy, bully) and – last but not least – nouns whose semantic shift is based on the pattern (POSITIVE) EMOTIONS → ENDEARMENTS (joy).
A case for two voices in Old Church Slavonic – reflexively marked OCS verbs
Authors: Malicka-Kleparska Anna
Published: October 2020

Old Church Slavonic data manifest significant similarities in the distribution and formal properties of anticausatives, reflexives, subject experiencer verbs, statives, and reciprocals, while their semantics may also be viewed as partly uniform. The structures representing the said classes of verbs are very frequent in the language, while passive structures, formed with analytic morpho-syntactic constructions, are relatively infrequent. Consequently, the expressions headed by anticausatives, reflexives, subject experiencer verbs, statives, and reciprocals (as well as dative impersonal structures) encroach on the area of semantics belonging in Modern Slavic to be the realm expressed in terms of passive morpho-syntax. The conclusion that can be drawn from this state of affairs is that Old Church Slavonic is characterized by the opposition of active and middle voices, while the passive voice is in its infancy.
Text rhythmic system: Its energetic and subliminal potentials
Authors: Kalyta Alla
Published: October 2020

The article introduces scientific considerations concerning the energetic nature and origin of rhythm subliminal potential in a spoken text as well as the mechanisms of its impact on the recipient. The paper advances the idea that rhythm energetics and its subliminal potential is based on such postulates: (1) rhythm is generated in the speaker’s psyche at the levels of his/her unconscious (or existential being) and subconscious (or mental and transcendental beings) spheres; (2) the text rhythmic system has a definite emotional and pragmatic potentials that realize a latent manipulative and subliminal influence; (3) generation of the spoken text tempo-rhythm is carried out by means of integrating micro-rhythms of all levels of the speaker’s inner speech into the internal macro-rhythm, which is materialized in the form of an outer tempo-rhythm as a complex means of achieving a subliminal effect of speech. The article also outlines the prospects of studying a subliminal nature of rhythm.
Second Order Coherence: A new way of looking at incoherence in texts
Authors: Ulbaek Ib
Published: October 2020

By using van Dijk’s concept of coherence and bringing it together with my Principle of meaning iconicity, we have a new way of looking at incoherence in texts. The principle says that closely related information is meaningfully related on a pragmatic level, an instruction to the reader to relate the information to each other. It is demonstrated by textual analysis that the concept of coherence can be used analytically by dividing it into first and second order coherence. First order coherence is the usual concept of coherence: sentences are connected by cohesive links and related by causality, time etc. Second order coherence is a way of organizing text by using incoherence as a way of organizing text into chunks of coherent parts. It is shown how readers can detect these structures in the text by detecting the incoherence even without the layout of the text to signal structure (e.g. indention of paragraphs).
Asking and answering: A contrastive study of English and Swedish basic communication verbs
Authors: Viberg Åke
Published: October 2020

This article presents a contrastive study of the English verbs ask and answer and their Swedish correspondents based on data from the English Swedish Parallel Corpus (ESPC), which is bi-directional and contains Swedish and English original texts and their corresponding translations. As a background, a short overview is given of Verbal Communication Verbs (VCVs) in general with brief discussions of speech act theory (Searle), direct and reported speech and conceptual frames (FrameNet) and their syntactic realizations. The contrastive study is concerned with networks of polysemy and the relationships of various senses with differing syntactic realizations across languages. The senses of ask are primarily distributed between two verbs in Swedish: fråga ‘ask a question’ and be ‘request (politely)’ but even some verbs with more specific meanings are involved. The concept of answering forms a conceptual network which is similar in English and Swedish but contrasts with respect to the way meanings are divided up between various verbs. English has a number of verbs such as answer, reply, respond, correspond, retort and rejoin, whereas Swedish to a great extent relies on one verb (svara) and its morphological derivations: besvara, ansvara, motsvara, försvara. In the Conclusion, pedagogical applications of the study are briefly discussed.
A new beginning? A bibliometric analysis of L2 vocabulary research in 1985
Authors: Meara Paul
Published: October 2020

This paper uses a co-citation analysis to examine the research on L2 vocabulary acquisition that was published in 1985. This year seems to mark a kind of transition in the field. Unlike the earlier years analysed in this series of papers, 1985 shows signs of a coherent L2 vocabulary research front developing. The number of papers that qualify for inclusion is much greater than in previous years, and the analysis suggests that recognisable research themes are beginning to be clearly articulated.
Pre-D non-possessor positions in Hungarian
Authors: Farkas Judit , Karácsonyi Krisztina
Published: October 2020

The paper investigates pre-D non-possessor positions in Hungarian. In Hungarian, non-deverbal nominal constructions containing pre-D non-possessor positions are acceptable only if they contain a demonstrative pronoun and also an adjective, and the appearance of a pre-D possessor does not impact the acceptability of the sentence. The paper also gives a brief discussion of similar constructions with pre-D non-possessors in German, mainly to shed light on the Hungarian data. Although German also allows for pre-D non-possessors, it does so under different conditions. A short topicalized element can readily appear in German sentences as a non-possessor dependent, but in this language a possessor can never appear in the same noun phrase. The paper also discusses deverbal nominal constructions with pre-D non-possessor dependents in Hungarian. In these constructions the presence of a possessor argument is indispensable. This is due to the fact that the placement of the non-possessor argument in a position preceding the possessor is legitimized by the fact that the former takes scope over the latter within the internal information structure of the matrix noun phrase. The paper also deals with the syntactic structure of said deverbal nominals.
The concept of ‘touch’ in the formation of the Croatian and Turkish lexicon: The example of tactile verbs
Authors: Raffaelli Ida , Kerovec Barbara
Published: October 2020

This paper explores the importance of the concept of ‘touch’ in the formation of the Croatian and Turkish lexicon. The main goals of the paper are 1) to investigate differences and similarities in conceptual mappings based on the concept of ‘touch’ in two typologically different and genetically unrelated languages by analyzing verbs referring to touch in Croatian and Turkish 2) to see to what extent the formation of tactile verbs differs with respect to lexicalization patterns in the two languages.
Sigmatic plurals in Romance varieties spoken in Italy and their interaction with -i plurals
Authors: Savoia Leonardo M. , Baldi Benedetta , Manzini M. Rita
Published: October 2020

In Sardinian, Friulian, Rhaeto-Romance, Occitan (not considered in this work) and Franco-Provençal varieties spoken in peripheral Italian areas, the -i inflection is not totally eradicated but interacts with plural -s. The coexistence of -s and -i reflects syntactic constraints. Specifically, -i is in complementary distribution with -s or it combines with –s, giving rise to a duplicated lexicalization of plurality. In any event, it is specialized for a subset of the morpho-syntactic contexts. The distribution of -i generally involves the D domain, i.e. determiners and clitics. In some cases, -i is limited to the D elements. Different agreement systems on D and on N emerge, recalling partial or asymmetric agreement phenomena known in literature. Moreover, in the relevant varieties (-)i is in turn the inflection of the dative clitic; this suggests that (-)i is endowed with a slightly different content from plural -s, that, on the contrary, shows no connection with dative.
Worldwide mobile wallet: a futuristic cashless system
Authors: Mumtaza Qorina Mailil Husna , Nabillah Shada Intishar , Amaliya Sholikhatul , Rosabella Yuveta , Hammad Jehad Abdelhamid
Published: October 2020

The proliferation of the internet led to the emergence of new technology. Nowadays, many activities can be done online, such a payment. After Mobile Banking was introduced publicly, a new method for payment called mobile wallet that uses mobile application as a device appears. The ease caused by this technology should be the main reason for implementing this system on to daily basis. Nevertheless, in various countries, the usage rate of the cashless system remains uneven, caused by many factors, both from internal factors such as security risks and external factors such as the policies of the countries involved. This paper will evaluate worldwide online payment systems to determine the impact of online payment systems usage, both positive and negative. This paper will evaluate the factors that affect the introduction of m-payment. Several measurements, such as country with the highest and lowest cashless payment usage and the reasons were taken for this research so that the objectives to improve the system and increase the usage rate can be achieved.
Emotions in texts
Authors: Pokhun Leeveshkumar , Chuttur M Yasser
Published: October 2020

Several studies have used different techniques to detect and identify emotions expressed in various sets of texts corpora. In this paper, we review different emotion models, emotion datasets and the corresponding techniques used for emotion analysis in past studies. We observe that researchers have been using a wide variety of techniques to detect emotions in texts and that there is currently no gold standard on which dataset or which emotion model to use. Consequently, although the field of emotion analysis has gained much momentum in previous years, there seems to be little progress into relevant research with findings that may be useful in real world applications. From our analysis and findings, we urge researchers to consider the development of datasets, evaluation benchmarks and a common platform for sharing achievements in emotion analysis to see further development in the field.
Upaya Meningkatkan Hasil Belajar Pendidikan PKn melalui Pembelajaran Learning Community pada Siswa Sekolah Dasar
Authors: Ahmad Kamaluddin , Hidayat Aenul
Published: October 2020

Rendahnya hasil belajar dipengaruhi oleh factor interen dan eksteren yang ada pada diri siswa, sisi lain pembelajaran PKn yang dinamis membutuhkan metode pembelajaran yang efektif yang bisa merubah tingkah laku dan prestasi belajar siswa. Tujuan dalam artikel ini untuk mengtahui upaya meningkatkan hasil belajar pendidikan PKn melalui pembelajaran learning community pada siswa sekolah dasar. Penelitian ini merupakan penelitian research action class room. Berdasarkan hasil penelitian menunjukkan bahwa dengan menerapakan pembelajaran learning community dapat meningkatkan hasil belajar siswa sekolah dasar, dengan hasil tindakan pada siklus I  ketuntasan belajar 56,76 % dan nilai rata-rata 69,83, dan pada siklus II mengalami peningkatan tetapi belum memenuhi indikator keberhasilan yaitu ketuntasan belajar 70,27% dengan nilai rata-rata 84,08. Siklus III mengalami peningkatan yang sangat siknifikat yaitu 89,20% dengan nilai rata-rata 84,08. Dengan demikian setiap sikus mengalami peningkatan yang signifikat dan memenuhi indikator keberhasilan (nilai klasikal) dari siklus sebelumnya. Low learning outcomes are influenced by internal and external factors that exist in students, on the other hand, dynamic Civics learning requires effective learning methods that can change student behavior and learning achievement. The purpose of this article is to determine the efforts to improve the learning outcomes of Civics education through learning community learning for elementary school students. This research is a research action class room. Based on the results of the research shows that by applying learning community learning can improve learning outcomes of elementary school students, with the results of action in cycle I learning completeness 56.76% and an average value of 69.83, and in cycle II has increased but has not met the indicators of success. namely mastery learning 70.27% with an average value of 84.08. Cycle III experienced a very significant increase, namely 89.20% with an average value of 84.08. Thus, each cycle experienced a significant increase and fulfilled the success indicator (classical value) from the previous cycle.
Proses Penyelesaian Sengketa Pembagian Kasus Harta Gono Gini Akibat Perceraian Pasangan Suami Istri di Pengadilan Agama Mataram
Authors: Muttaqin Zedi , Usqak Siti Urwatul
Published: October 2020

Abstrak: Tujuan penelitian ini adalah untuk mengetahui tugas dan peran pengadilan agama dalam menyelesaikan kasus harta gono gini sebagai upaya penyelesaian konflik keluarga pasca bercerai suami dan istri (studi kasus di Pengadilan Agama Mataram).  Penelitian ini adalah  penelitian kualitatif dengan pendekataan deskriptif. Subyek penelitian atau informan dalam penelitian ini adalah Kepala Pengadilan Agama, Hakim, dan Panitera Pengadilan Agama Mataram. Metode pengumpulan data yang digunakan adalah Observasi, wawancara dan dokumentasi. Sumber data yang digunakan yaitu sumber data primer, Teknik analisis data adalah reduksi data, penyajian data, dan menarik kesimpulan. Hasil penelitian  yang diperoleh bahwa tugas dan peran pengadilan agama mataram dalam menyelesaikan kasus harta gono gini yaitu : Tugas dan Peran Pengadilan Agama Mataram yaitu menerima, memeriksa, memutuskan, mengadili dan menyelesaikan perkara yang diaajukan oleh para pihak penggugat., dan Proses penyelesaian dan pertimbangan hakim dalam menentukan pembagian harta gono gini yaitu : Hakim dalam proses pembagian harta bersama yaitu membagi harta bersama tersebut sama-sama ½ (seperdua) penggugat dan tergugat sedangkan hakim dalam mempertimbangkan pembagian harta gono gini atau harta bersama tidak mesti terpaku terhadap UU tetapi sebagai hakim proses pertimbangan pembagian harta gono gini harus berdasarkan rasa keadilan karna hakim sendiri mempunyai asas kontralegen.Abstract:  The purpose of this study was to determine the duties and roles of religious courts in resolving inheritance cases as an effort to resolve family conflicts after divorce (a case study at the Mataram Religious Court). This research is qualitative research with a descriptive approach. The research subjects of the study were the Head of the Religious Courts, Judges, and Registrars of the Mataram Religious Court. Data collection methods used were observation, interviews, and documentation. Sources of data used were primary data sources; data analysis techniques were data reduction, data presentation, and concluding. The results showed that the duties and roles of the Mataram Religious Court in resolving the case of the Mataram Religious Court are the Duties and Roles of the Mataram Religious Court such as receiving, examining, deciding, adjudicating and completing cases filed by the plaintiffs, and the process of settlement and judges' considerations. In determining the distribution of assets of inheritance, the judges in the process of sharing joint assets are dividing the joint assets together ½ (half) of the plaintiff and the defendant, while the judge in considering the distribution of assets or joint assets does not have to be fixated on the law but as a judge in consideringthe process of the distribution of assets must be based on a sense of justice because the judges themselves have theprinciple of contralegem.
Accounting of geomechanical layer properties in multi-layer oil field development
Authors: Galkin Sergey , Krivoshchekov Sergey , Kozyrev Nikita , Kochnev Alexander , Mengaliev Alexander
Published: October 2020

Amid the ever-increasing urgency to develop oil fields with complex mining and geological conditions and low-efficiency reservoirs, in the process of structurally complex reservoir exploitation a number of problems arise, which are associated with the impact of layer fractures on filtration processes, significant heterogeneity of the structure, variability of stress-strain states of the rock mass, etc. Hence an important task in production engineering of such fields is a comprehensive accounting of their complex geology. In order to solve such problems, the authors suggest a methodological approach, which provides for a more reliable forecast of changes in reservoir pressure when constructing a geological and hydrodynamic model of a multi-layer field. Another relevant issue in the forecasting of performance parameters is accounting of rock compressibility and its impact on absolute permeability, which is the main factor defining the law of fluid filtration in the productive layer.

The paper contains analysis of complex geology of a multi-layer formation at the Alpha field, results of compression test for 178 standard core samples, obtained dependencies between compressibility factor and porosity of each layer. By means of multiple regression, dependencies between permeability and a range of parameters (porosity, density, calcite and dolomite content, compressibility) were obtained, which allowed to take into account the impact of secondary processes on the formation of absolute permeability. At the final stage, efficiency of the proposed methodological approach for construction of a geological and hydrodynamic model of an oil field was assessed. An enhancement in the quality of well-by-well adaptation of main performance parameters, as well as an improvement in predictive ability of the adjusted model, was identified.
Features of the underground storages construction in depleted oil and gas condensate fields
Authors: Gasumov Ramiz , Gasumov Eldar , Minchenko Yulia
Published: October 2020

The paper considers the features of the underground storages (US) construction in depleted oil and gas condensate fields (DOGCFs). The requirements for the structure of the formation, corresponding to the parameters of the object for possible US creation are presented.

The influence of geological, hydrogeological, mining and technical rock formation conditions on the reliability and tightness of underground storages, including underground gas storages, has been evaluated. The necessary conditions for the US design are analyzed at the example of the Ach-Su oil and gas condensate field, in the presence of a well-explored trap with acceptable parameters for the construction of an underground storage. An important aspect is the geological conditions that meet the criteria for selecting the object: the required structure, the absence of fracturing faults, high reservoir properties of the formation, a sufficient volume of the deposit for the storage. Geological conditions lay the basis for determining the individual characteristics of the US construction technology at each DOGCF. The refined results for the current gas-saturated pore volume and the rate of pressure drop in the formation are presented, which makes it possible to select improved technological indicators in the course of  operation of the created US. In order to select the optimal option for the design and construction of the US, the results of economic and geological scenarios analysis were studied concurrently with the capabilities of the technological operation of the object and transport system, which can ensure the maximum daily production of the storage.
Barriers to implementation of hydrogen initiatives in the context of global energy sustainable development
Authors: Litvinenko Vladimir , Tsvetkov Pavel , Dvoynikov Mikhail , Buslaev Georgii
Published: October 2020

Modern trends in the global energy market linked to the Sustainable Development Goals often lead to the adoption of political decisions with little basis in fact. Stepping up the development of renewable energy sources is an economically questionable but necessary step in terms of its social and ecological effects. However, subsequent development of hydrogen infrastructure is, at the very least, a dangerous initiative. In connection with mentioned above, an attempt to examine hydrogen by conducting an integral assessment of its characteristics has been made in this article. As a result of the research conducted, the following conclusions concerning the potential of the widespread implementation of hydrogen in the power generation sector have been made: as a chemical element, it harms steel structures, which significantly impedes the selection of suitable materials; its physical and volume characteristics decrease the general efficiency of the energy system compared to similar hydrocarbon solutions; the hydrogen economy does not have the necessary foundation in terms of both physical infrastructure and market regulation mechanisms; the emergence of widely available hydrogen poses a danger for society due to its high combustibility. Following the results of the study, it was concluded that the existing pilot hydrogen projects are positive yet not scalable solutions for the power generation sector due to the lack of available technologies to construct large-scale and geographically distributed infrastructure and adequate international system of industry regulation. Thus, under current conditions, the risks of implementing such projects considerably exceed their potential ecological benefits.
Processing of platinum group metal ores in Russia and South Africa: current state and prospects
Authors: Aleksandrova Tatyana , О’Connor Cyril
Published: October 2020

The presented study is devoted to a comparative review of the mineral raw material base of platinum group metals (PGMs) and technologies of their processing in South Africa and Russia, the largest PGM producers. Mineralogical and geochemical classification and industrial value of iron-platinum and platinum-bearing deposits are presented in this work. The paper also reviews types of PGM ore body occurrences, ore processing methods (with a special focus on flotation processes), as well as difficulties encountered by enterprises at the processing stage, as they increase recovery of the valuable components. Data on mineralogical features of PGM deposits, including the distribution of elements in the ores, are provided. The main lines of research on mineralogical features and processing of raw materials of various genesis are identified and validated. 
Sulfide deposits are found to be of the highest industrial value in both countries. Such unconventional PGM sources, as black shale, dunites, chromite, low-sulfide, chromium and titanomagnetite ores, anthropogenic raw materials, etc. are considered. The main lines of research that would bring into processing non-conventional metal sources are substantiated.
Analysis of new processing and metallurgical methods of PGM recovery from non-conventional and industrial raw materials is conducted; the review of existing processing technologies for platinum-bearing raw materials is carried out. Technologies that utilize modern equipment for ultrafine grinding are considered, as well as existing reagents for flotation recovery; evaluation of their selectivity in relation to platinum minerals is presented.
Basing on the analysis of main technological processes of PGM ore treatment, the most efficient schemes are identified, i.e.,gravity and flotation treatment with subsequent metallurgical processing.
Reliability and Feasibility of the Memory Associative Test TMA-93
Authors: Franco-Macías Emilio , Rodrigo-Herrero Silvia , Luque-Tirado Andrea , Méndez-Barrio Carlota , Medina-Rodriguez Manuel , Graciani-Cantisán Eugenia , Sánchez-Arjona María Bernal , Maillet Didier
Published: October 2020

Background:

Memory tests focused on binding may be more sensitive to diagnose Alzheimer’s disease (AD) at an early phase. TMA-93 examines relational binding by images.

Objective:

Evaluate the reliability (internal consistency and inter-rater and test-retest reliability) and feasibility of the TMA-93 in a clinic setting with low-educated individuals and limited face-to-face time per patient.

Methods:

The study was undertaken in a neurology outpatient clinic of a hospital in Southern Spain. The internal consistency of the TMA-93 was estimated in 35 patients with amnestic mild cognitive impairment (aMCI) and 40 healthy controls (HCs). The inter-rater reliability (by two raters) and feasibility (by recording the percentage of participants who completed the test, and by timing the administration time) were evaluated in HCs ( n = 16), aMCI patients ( n = 18), and mild dementia patients ( n = 15). The test-retest reliability for the TMA-93 total score was studied in 51 HCs tested by the same examiner 2–4 months apart. The internal consistency was estimated by Cronbach’s alpha. The inter-rater and test-retest reliability was quantified by the intraclass correlation coefficient (ICC). The administration time was compared by diagnosis.

Results:

The internal consistency was “optimal” (Cronbach’s alpha = 0.936). The test-retest reliability was “good” [ICC = 0.802 (CI 95%  = 0.653–0.887)]. The inter-rater reliability was “optimal” [ICC = 0.999, (CI 95%  = 0.999–1)]. All participants completed the test. The administration time ranged from less than 3 min in HCs to 6 min in aMCI patients, and 7 min in mild dementia patients.

Conclusion:

Good feasibility and reliability support using the TMA-93 for examining visual relational binding, particularly in the context of low-educational attainment and limited time per patient.
Long non-coding RNA GAS5 knockdown facilitates proliferation and impedes apoptosis by regulating miR-128-3p/FBLN2 axis in ox-LDL-induced THP-1 cells
Authors: Shen Zijian , Li Haigang
Published: October 2020

BACKGROUND: Long non-coding RNAs (lncRNAs) are found to involve in modulating the development of atherosclerosis (AS). But the molecular mechanism of lncRNA growth-arrest specific transcript 5 (GAS5) in AS is not fully understood. METHODS: QRT-PCR was performed to measure the abundances of GAS5, miR-128-3p and fibulin 2 (FBLN2). Oxidized low-density lipoprotein (ox-LDL)-treated THP-1 cells were employed as cell models of AS. The cell proliferation and apoptosis were analyzed using CCK-8 and Flow cytometry assays, respectively. Levels of all protein were examined by western blot. The interaction among GAS5, miR-128-3p and FBLN2 was confirmed via dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. RESULTS: GAS5 was elevated and miR-128-3p was decreased in the serum of patients with AS and ox-LDL-stimulated THP-1 cells. Ox-LDL stimulation inhibited proliferation and induced apoptosis of THP-1 cells. Meanwhile, GAS5 directly targeted miR-128-3p and inversely modulated its expression. Importantly, GAS5 depletion facilitated cell proliferation and impaired apoptosis in ox-LDL-induced THP-1 cells. Additionally, GAS5 augmented FBLN2 expression through sponging miR-128-3p, and miR-128-3p facilitated proliferation and retarded apoptosis of ox-LDL-induced THP-1 cells by targeting FBLN2. CONCLUSION: GAS5 knockdown promoted the growth of ox-LDL-induced THP-1 cells through down-modulating FBLN2 and increasing miR-128-3p, suggesting the potential value of GAS5 for treatment of AS.
Association of blood viscosity with first-pass reperfusion in mechanical thrombectomy for acute ischemic stroke
Authors: Song Kyojun , Yi Ho Jun , Lee Dong Hoon , Sung Jae Hoon
Published: October 2020

BACKGROUND: Elevated blood viscosity has been reported as a risk factor for cerebrovascular disease. OBJECTIVE: The relationship between blood viscosity and outcomes of mechanical thrombectomy (MT) for large artery occlusion (LAO) were investigated in the present study. METHODS: A total of 238 patients were enrolled and systolic blood viscosity (SBV) and diastolic blood viscosity (DBV) were measured using the scanning capillary tube viscometer. Receiver operating characteristic (ROC) analysis was performed to specify the association of viscosity with the first-pass reperfusion (FPR). Multivariable and regression analyses were performed to evaluate the relationship of viscosity with FPR and various variables. RESULTS: Based on ROC analysis, the best DBV cutoff value was 10.55 (cP). In multivariable analysis, high DBV was associated with FPR failure (odds ratio 2.82, 95% confidence interval 1.64–4.22; p = 0.001). Increased DVB could be associated with elevated SBV, hematocrit level, and blood urea nitrogen/creatinine ratio (p = <0.001, 0.004, and 0.002, respectively). CONCLUSIONS: Elevated DBV was associated with FPR failure. Patients with high DBV had longer thrombus length and required more stent passages than patients with low DBV.
Dynamic response prediction of water medium explosion container based on convolutional neural network
Authors: Li Linna , Fang Chenchen , Zhong Dongwang , He Li , Si Jianfeng
Published: October 2020

The water medium explosion container is an experimental device that simulates explosion in different water depth environments by loading different hydrostatic pressures and different doses of explosive. To ensure its safety during service, it is necessary to study the dynamic response of water medium explosion container. Because the dynamic response is complicated and the correlation between the response and the load of the container is nonlinear, it is difficult to calculate the dynamic response by analytical and numerical methods. In this paper, a model is built based on convolutional neural network (CNN) to predict the dynamic response of water medium explosion container. The accuracy and usability of the CNN prediction model are verified by comparison with the prediction results of the BP neural network model. The results show that CNN can be effectively used to predict the strain response of the dynamic response of water medium explosion container. and this method will play an important role in the later study of the overall feature analysis of the dynamic response of the water medium explosion vessel.
Research progress of acoustic emission detection technology based on modal theory
Authors: Liu Yan
Published: October 2020

The essence of modal acoustic emission theory is to study acoustic emission waves using Lamb wave theory. Different from the traditional acoustic emission research, the modal acoustic emission analyzes the entire waveform of the signal received by the sensor, distinguishes various modal waves in the composite material, and improves the detection accuracy of the composite material. At present, the research on acoustic emission technology of composite materials at home and abroad mainly focuses on five aspects of Lamb wave dispersion characteristics, finite element simulation of defect detection, experimental system design, time-frequency analysis of Lamb wave signal, damage location and damage imaging. From these five aspects, the research progress of the composite defect nondestructive testing technology is reviewed, and the problems to be further solved are put forward.
Predicting the future price of a commodity using the OWMA operator: An approximation of the interest rate and inflation in the brown pastusa potato price
Authors: Fonseca-Cifuentes Gina , León-Castro Ernesto , Blanco-Mesa Fabio
Published: October 2020

This main aim of this paper is to propose a methodology for the prediction of the future price of the brown pastusa potato in Colombia, taking into consideration the variables of interest rate, as measured by fixed term deposits (FTDs), and inflation rate, as measured by the consumer price index (CPI). The methodology conducts linear regression analysis and assesses the results using the significance test, the Durbin-Watson statistic, analysis of the variance inflation factor (VIF) and the coefficient of determination. After that, the forecast of the independent variables has been conducted with the ordered weighted moving average (OWMA) operator and new proposed OWA operators using probabilities that are presented in the paper. Using these new methods and the proposed econometric model, it is possible to establish future prices. The results show a greater impact of the interest rate than inflation, as well as the need to include supply and demand variables that have not been included due to the absence of systematic information.
A bibliometric overview of volatility
Authors: Avilés-Ochoa Ezequiel , Flores-Sosa Martha , Merigó José M.
Published: October 2020

Price volatility is a matter of importance for making decisions in the finance world. The growing studies regarding volatility have focused on minimizing the risks through modeling, estimating and forecasting. This paper presents a bibliometric overview of the most important authors, institutions and countries that work on the topic. Additionally, a historical analysis of how the agents have interrelated is presented. For the purposes of the analysis and the design of tables and graphics, tools from the Web of Science Core Collection and the VOSviewer software were used. The results show the importance of volatility in the study of business economics and decision making.
Two-stage fuzzy mixed integer optimization model for three-level location allocation problems under uncertain environment
Authors: Liu Zhimin , Qu Shaojian , Wu Zhong , Ji Ying
Published: October 2020

The problem of the optimal three-level location allocation of transfer center, processing factory and distribution center for supply chain network under uncertain transportation cost and customer demand are studied. We establish a two-stage fuzzy 0-1 mixed integer optimization model, by considering the uncertainty of the supply chain. Given the complexity of the model, this paper proposes a modified hybrid second order particle swarm optimization algorithm (MHSO-PSO) to solve the resulting model, yielding the optimal location and maximal expected return of supply chain simultaneously. A case study of clothing supply chain in Shanghai of China is then presented to investigate the specific influence of uncertainties on the transfer center, clothing factory and distribution center three-level location. Moreover, we compare the MHSO-PSO with hybrid particle swarm optimization algorithm and hybrid genetic algorithm, to validate the proposed algorithm based on the computational time and the convergence rate.
A novel image classification model based on adversarial training for pulsar candidate identification
Authors: Zhou Linyong , You Shanping , Ren Bimo , Yu Xuhong , Xie Xiaoyao
Published: October 2020

Pulsars are highly magnetized, rotating neutron stars with small volume and high density. The discovery of pulsars is of great significance in the fields of physics and astronomy. With the development of artificial intelligent, image recognition models based on deep learning are increasingly utilized for pulsar candidate identification. However, pulsar candidate datasets are characterized by unbalance and lack of positive samples, which has contributed the traditional methods to fall into poor performance and model bias. To this end, a general image recognition model based on adversarial training is proposed. A generator, a classifier, and two discriminators are included in the model. Theoretical analysis demonstrates that the model has a unique optimal solution, and the classifier happens to be the inference network of the generator. Therefore, the samples produced by the generator significantly augment the diversity of training data. When the model reaches equilibrium, it can not only predict labels for unseen data, but also generate controllable samples. In experiments, we split part of data from MNIST for training. The results reveal that the model not only behaves better classification performance than CNN, but also has better controllability than CGAN and ACGAN. Then, the model is applied to pulsar candidate dataset HTRU and FAST. The results exhibit that, compared with CNN model, the F-score has increased by 1.99% and 3.67%, and the Recall has also increased by 6.28% and 8.59% respectively.