bluuebunny/crossref_metadata_2025 huggingface dataset:
Senosios regulos karmelitų prie Šv. Jurgio bažnyčios buvusio vienuolyno biblioteka: sovietmečio „spaudos archyvo“ šmėkla ar knygos kultūros faktas?
Authors: Pacevičius Arvydas
Published: June 2021

Straipsnyje nagrinėjamas Senosios regulas karmelitų vienuolyno, įkurto 1506 melais ir veikusio iki 1797 metų prie Šv. Jurgio bažnyčios Vilniuje, bibliotekos susidarymas, sudėtis ir likimas. Tyrimu siekta ne tik atskleisti senosios biblio­tekos sudėtį, bei ir išsiaiškinti, kodėl istoriografijoje ir istorinėje atmintyje ji buvo pamiršta. Priežastis, be ankstyvo vienuolyno uždarymo (1797), galėtų būti gudiška (baltarusiška) Šv. Jurgio karmelitų provincijos administracinė, geog­rafinė ir etninė tapatybė. Todėl straipsnyje keliamas klausimas: Lietuvoje ar Baltarusijoje veikė minėtas vienuolynas? Šv. Jurgio vienuolyno biblioteka istoriniuose šaltiniuose pirmą kartą paminėta 1677 metais, kuomet vienuolyno prijoro Pranciškaus Gožinskio (Gorzynski) rūpesčiu buvo sudalytas bažnyčios ir vienuolyno inventorius – surašytos bažnyčios (Mszaly i Księgi) ir vienuolyno bibliotekos knygos (Inventorium bibliothecae). Tuomet bažnyčioje buvo 8 knygos, o vienuolyne – in folio 23, in quarto 14, in octavo 14 knygų, taigi iš viso 51 knyga. Praėjus daugiau kaip 100 metų, 1796 m. Šv. Jurgio vienuolyno bibliotekoje, prieš pat patalpas perduodant seminarijai, buvo 606 tomai. Šv. Jurgio biblioteka straipsnyje analizuojama kitų karmelitų bibliotekų raidos kontekste, aptariama Vilniaus Visų Šventųjų, Linkuvos, Raseinių ir kt. bibliotekų struktūra ir turinys, nagrinėjamos bibliografavimo ir katalogavimo tradicijos visoje Lietuvos karmelitų provincijoje. Knygų migracijos ir komplektavimo šaltinių analizė parodė, kad Šv. Jurgio biblioteka po vienuolyno uždarymo buvo padalinta kitoms Lietuvos karmelitų provincijos bibliotekoms. Pavyzdžiui, kai kurios knygos pateko į Linkuvos vienuolyną. Taigi Šv. Jurgio vienuolyno bibliotekos likimą ir „užmarštį“ nulėmė ankstyvas vienuolyno bendruomenės išformavimas pirmaisiais Rusijos imperijos valdymo metais; knygų išsklaidymas perduodant kitiems karmelitų vienuolynams ir nedokumentuojant šios knygų migracijos; istoriografinis nenoras įžvelg­ti „rusėniškame“ vienuolyne istorinės Lietuvos paveldą. Apskritai ši biblioteka, jos ištakos ir turinys turėtų sulaukti įdėmesnio tyrinėtojų žvilgsnio, nes ji reprezentuoja vieną seniausių „netradicinės orientacijos“ Vilniuje ir LDK vienuo­liškosios knygos kultūros židinių.
Krystyna Bednarska-Ruszajowa: nauji darbai ir jos darbų bibliografija
Authors: Ivanovič Marija
Published: June 2021

Publikacijoje pristatoma Krystyna Bednarska-Ruszajowa, Krokuvos Jogailos universiteto profesorė. Mokslinės informacijos ir bibliotekininkystės instituto dėstytoja, knygotyrininkė bibliografė, metodologė, knygų ir bibliotekos visuomeninių komunikacijos procesų tyrinėtoja. Šiame profesorės jubiliejui skirtame straipsnyje apžvelgiami reikšmingiausi jos darbai, pateikiama jos darbų bibliografija, kurioje atsispindi jos tyrinėjimų kelias ir raida. Jos įvairiapusiškas domėjimasis knyga, memuaristika ir bibliotekų visuomeninėmis komunikacijos funkcijomis atsispindinti knygotyros leidiniuose išspausdintuose straipsniuose. Išskiriamos svarbiausios jos parašytas knygos: „Biblioteki i książki w pamiętnikach polskich XVIII-XX wieku: rekonesans źródlowy“ ir „Uczyć - bawić - wychowywać: ksiąźka i jej funkcja spoleczna w Polsce v okresie Oświecenia“ –tai ilgalaikio ir nuodugnaus mokslinio tyrinėjimo rezultatas. Šios knygos ypač turėtų sudominti Švietimo epochos ir XVIII a. Lietuvos ir Lenkijos knygotyrininkus bei bibliotekų istorijos tyrinėtojus.
ESTUDO DE CASO SOBRE A FRAUDE NO CONTROLE DE EMISSÕES DE POLUENTES DA VOLKSWAGEN
Authors: Himenes Hugo Stéfano Buzaglo , Pinto Luana Luiza Marques Costa , Ferreira Adriano Fernandes
Published: June 2021

Com exigências cada vez mais rigorosas sendo impostas às empresas no seu processo de produção, fraudes constantes têm sido mostradas ao mundo. O governo com um método coercitivo, que obriga as empresas a poluírem cada vez menos, e essas, por sua vez, seja por falta de capacidade técnica seja aporte financeiro, não conseguem executar as exigências impostas, burlando sistemas a fim de não serem penalizadas. O presente artigo tem por objetivo apontar a dificuldade de cumprimento das normas ambientais. De forma explicativa, através de pesquisa doutrinária, reportagens e trabalhos científicos foi construída a metodologia deste trabalho. Nesse cenário, estudos, sobre impactos e possibilidades de mudanças no sistema de produção se mostram a chave para o desenvolvimento sustentável no mundo.
PROMOÇÃO DA SAÚDE, CAPACIDADE FUNCIONAL E FUNÇÃO COGNITIVA EM IDOSOS: NOTAS DE UM ENTRELACE
Authors: Santos Noemi Pereira dos , Paulo Henrique Fernandes Ferreira  , Silva Mirian Dias Moreira e , Miranda Mônica Karla Vojta , Souza Anselmo Cordeiro de
Published: June 2021

Obetivou-se apontar breves notas introdutórias na literatura científica de contribuições teóricas e práticas em promoção da saúde e possíveis entrelaçamentos com a capacidade funcional e a função cognitiva de idosos. Trata-se de uma comunicação curta que a partir do espaço cientifico e acadêmico, toma como estratégia a narrativa bibliográfica. Tomando como critério de seleção os títulos de interesse e conveniência a partir da combinação dos Descritores em Ciências da Saúde relacionados a temática. Utilizaram-se as fontes de informação: SciELO, PubMed e Google Scholar, no período de Janeiro a Junho de 2018. Evidenciou-se o estilo de vida promotor de saúde e suas relações com a capacidade funcional e função cognitivas em idosos, bem como suas intersecoes  interdisciplinares podem possibilitar novas alternativas ou caminhos para fazer frente as demandas provocadas pelas recentes mas inexoráveis transições sociais, demográficas e epidemilogicas. Concluimos que embora esse trabalho não seja uma ampla revisão da literatura, traz dados importantes ao se propor o estudo interdisciplinar da promoção da saúde relacionada a capacidade funcional e função cognitiva. Explicitando o entrelace de
ATENÇÃO FARMACÊUTICA AO IDOSO NA POLIFARMÁCIA
Authors: Santos Gabriel Rian dos , Araújo Hudson Salles , Leal Valéria Sobrinho , Rambo Douglas Fernando
Published: June 2021

: O profissional farmacêutico está cada vez mais desenvolto em suas habilidades com a população idosa, isso inclui evitar problemas relacionados a medicação, como interações entre os fármacos prescritos pelo médico, reações indesejáveis no tratamento farmacológico, eliminação de complexidade e duplicidade desnecessárias do regime de medicamentos. Por meio dessas atividades o profissional consegue promover um tratamento medicamentoso que seja eficaz e seguro ao seu paciente. Assim, o presente estudo busca revisar a forma em que o profissional farmacêutico pode contribuir na atenção farmacêutica ao idoso na polifarmácia. Objetivo: Revisar sobre a importância da atenção farmacêutica ao uso da polifarmácia em pessoas acima de 60 anos. Métodos: Trata-se de um estudo de revisão de literatura integrativa e de levantamento bibliográfico, cuja a metodologia foi constituída em busca de artigos completos publicados entre os anos de 2009 a 2021 em bases de dados, nas quais foram analisados e selecionados 30 artigos para a elaboração da pesquisa. Utilizou-se como critérios de avaliação para a coleta de informação: assistência farmacêutica, saúde do idoso, interações medicamentosas e polifarmácia. Resultados: Dos 30 artigos, quinze foram escolhidos para análise percebeu-se que o uso simultâneo e crônico de medicamentos é cada vez mais comum em idosos, o que intensifica a probabilidade de efeitos colaterais destes, podendo gerar então, uma interação medicamentosa, diminuição da adesão e toxicidade, entre outros. Considerações Finais: A polifarmácia ela tem uma ampla variação no Brasil, sendo utilizada por muitos idosos. Por isso, a atenção farmacêutica é um dos pontos chaves para a utilização da polifarmácia, uma vez que é possível avaliar as prescrições e os medicamentos que estão sendo utilizados de forma inapropriada pelas pessoas.
A case study of zeolitization process: “Tufo Rosso a Scorie Nere” (Vico volcano, Italy): inferences for a general model
Authors: Novembre Daniela , Gimeno Domingo , Cappelletti Piergiulio , Graziano Sossio Fabio
Published: June 2021

Abstract. This paper focuses on the authigenic mineralization processes
acting on “Tufo Rosso a Scorie Nere” (TRS), i.e. one of the main pyroclastic units of the Vico
stratovolcano (Latium, Italy). The pyroclastic deposits appear in general
massive and made of “black vitreous vesiculated juvenile scoriae”,
immersed in an ashy matrix lithified after zeolitization processes. The main
minerals are chabazite and phillipsite, and the zeolitic content is locally
variable, reaching 68 % wt. Zeolites grow replacing both amorphous
fraction and pre-existing phases, occurring inside both matrix and scoriae.
Concerning scoriae, zeolitization moves from the rim to the core of the
scoriaceous fragment as a function of (a) temperature of the fluids and (b)
permeability (primary or secondary). Composition of parental fresh glass and
that of zeolitized rocks is compatible with trachyte chemistry, lightly
undersaturated in SiO2, and the alteration processes modified the
parental rock chemical features. Zeolites genesis is ascribed to a
“geoautoclave-like system”, and zeolites display a Si/Al ratio similar to
that of the parental glasses. TRS presents promising mineralogical
characteristics as supplementary cementitious material in the production of
mixed cements.
Pandemic Minecrafting: An Analysis of the Perceptions of and Lessons Learned from a Gamified Virtual Geology Field Camp
Authors: Rader Erika , Love Renee , Reano Darryl , Dousay Tonia A. , Wingerter Natasha
Published: June 2021

Abstract. To mimic the 3-D geospatial components of geologic mapping usually spotlighted by field camp, we developed a virtual course based in the sandbox videogame Minecraft. Paired with audio/video conferencing and real data, students practiced measuring strike and dip, orienteering with a compass, matching landscape features with topographic maps, and tracing geologic contacts within the team structure typically employed in field camp. Open-source programs and tutorials freely available online assisted with constructing the Minecraft worlds. Assignments were aligned to the nine learning outcomes established for geology field camps by the National Association of Geology Teachers (NAGT). A pre- and post-survey quantified students’ learning of the subject matter as well as perceptions towards Minecraft and online learning. We also held feedback sessions and conducted in-class, live observations to classify students’ reactions and experiences during virtual activities. Overwhelmingly, students indicated they would have preferred an in-person field camp, yet considered the Minecraft assignments exciting, important, interesting, and valuable. Regardless of perceived barriers, scores on subject matter questions increased from the pre- to the post-survey. Finally, observations illustrated how students’ experience in a virtual field camp recreated comparable components that students experience during an in-person field camp (e.g., students discussing career pathways, geological skills, and fostering interpersonal relationships). Because this virtual course achieved the curricular goals as well as the non-curricular goals and was relatively easy to construct, we recommend the usage of Minecraft for virtual geology courses in the future.
Sensitivity analysis of a data-driven model of ocean temperature
Authors: Furner Rachel , Haynes Peter , Munday Dave , Paige Brooks , Jones Daniel C. , Shuckburgh Emily
Published: June 2021

Abstract. There has been much recent interest in developing data-driven models for weather and climate predictions. These have shown reasonable success in modelling atmospheric dynamics over short time scales, however there are open questions regarding the sensitivity and robustness of these models. Using model interpretation techniques to better understand how data-driven models are making predictions is critical to developing trust in these alternative prediction systems. We develop a simple regression model of ocean temperature evolution, Ocean Temperature Regressor v1.0, and investigate its sensitivity to improve understanding of whether data-driven models are capable of learning the complex underlying dynamics of the systems being modelled. We investigate model sensitivity in a variety of ways and find that Ocean Temperature Regressor v1.0 behaves in ways which are, for the most part, in line with our knowledge of the ocean system being modelled. Specifically we see that the regressor heavily bases its forecasts on, and is dependent on, variables which we know are key to the physical dynamics inherent in the system, such as the currents and density. By contrast, inputs to the regressor which have limited direct dynamic impact, such as location, are not heavily used by the regressor. We also find that the regression model requires non-linear interactions between inputs in order to show any meaningful predictive skill – in line with out knowledge of the highly nonlinear dynamics of the ocean. Further sensitivity analysis is carried out to interpret that the ways in which certain variables are used by the regression model. Results here are again mostly in line with our physical knowledge of the system, for example, we see that information about the vertical profile of the water column reduces errors in areas associated with convective activity, and information about the currents is used by the regressor to reduce errors in regions dominated by advective processes. Our results show that even a simple regression model is capable of “learning” much of the physical dynamics inherent in the ocean system being modelled, which gives promise for the sensitivity and generalisability of data-driven models more generally.
Studi Rendemen Finir dan Besarnya Limbah Pada Pengupasan Finir dengan Mesin Rotary Lathe Tipe Spindleless
Authors: Syafii  , Novari Firna
Published: June 2021

In general, the log-block peeling yield on a rotary lathe machine ranges from 70 - 80% of the log volume in the form of veneer, and the remaining 20-30% is waste. This variation depends on the quality and type (species) of the log of the raw material. The veneer peeling usually consist of the face and back veneer (continuous veneer) ranging from 50% to 70% and core veneer as poly piece veneer ranging from 20 to 30%. Under certain conditions, the waste can reach up to 50% including losses due to rounding, shrinkage of the veneer, cracks, spurs, and pith (log-core).

From the description above and several other observations, the research was carried out regarding this matter. There is a way to reduce the amount of waste in log peeling using rotary machines and at the same time increasing the recovery peeling. Thus, it will reduce production costs and increase profits for the company.

One of the contributors to a large amount of veneer peeling waste is the use of rotary lathe veneer peeling machines with large spindles which are still widely used in veneer and plywood factories (plymill), especially in Indonesia. So far, on average half of raw logs turn into waste, and 25 percent is contributed by a rotary lathe machine. Meanwhile, on the other hand, the need for plywood products will continue to increase day by day. This is because plywood is one of the most environmentally friendly building materials and comes from renewable natural resources. Along with the development of the plywood industry, the increase of raw material needs is inevitable. So, waste products will also continue to increase too.

In this regard, there must be fundamental changes in this industry, including the use of rotary lathe without spindles as the substitute from the conventional machine. In relevance to this situation, this research was directed with the aim of knowing the yield and amount of veneer peeled by a spindle-less rotary lathe machine and at the same time to find out the waste it produces. So, this information can later become a consideration for stakeholders to replace the old rotary lathe with a type spindle-less without a doubt.

The results show that veneer peeling using a spindle-less rotary lathe machine increases the yield of the veneer and reduce the amount of waste. Most of the peeling results are in the form of a veneer consisting of 58.83% continuous/endless veneer for the face/back, and 22.83% of poly piece core (odd veneer) from the core veneer. The total veneer yield is 81.67%. The remaining were 1.32%, 0.93%, and 16.08% for log-core waste, cut edge finish, and round-up veneer, respectively.  The spindle-less rotary lathe machine has provided increased yields and significantly reduced the amount of waste.

 

Keywords : Waste, rotary lathe, spindle-less, veneer.
Kajian Karakteristik Pasang Surut Di Perairan Teluk Balikpapan Menggunakan Metode Admiralty
Authors: Octaferina Alvina Resha , Prasetya F. V. Astrolabe Sian
Published: June 2021

Banyaknya kegiatan di Perairan Teluk Balikpapan sehingga diperlukan pengamatan pasang surut untuk mengetahui karakterisik dan tipe pasang surut. Karakteristik dan tipe pasang surut memiliki manfaat untuk memberikan gambaran umum tentang berapa kali pasang atau surut, tanggal LLWL dan HHWL serat fase bulannya, sehingga dapat memberikan acuan yang diperlukan untuk melaksanakan kegiatan di Perairan Teluk Balikpapan. Tujuan dari kajian ini adalah untuk mengetahui karakteristik dan grafik pasang surut di Perairan Teluk Balikpapan. Data yang digunakan merupakan data pasang surut bulan November tahun 2019 dari Stasiun Pengamatan Pasang Surut yang berlokasi di Pelabuhan Semayang, Teluk Balikpapan. Metode yang digunakan adalah metode perhitungan Admiralty dan Formzahl.  Hasil dari penelitian ini berupa 2 (dua) nilai konstituen komponen harmonic pasang surut dari perhitungan metode Admiralty yaitu nilai amplitudo (A) dan sudut fase (g˚), nilai Formzahl, nilai MSL, HHWL dan LLWL dari perhitungan metode Admiralty, nilai HHWL dan LLWL dari analisa data pasang surut serta fase bulan dan grafik pasang surut. Karakteristik pasang surut di Perairan Teluk Balikpapan pada bulan November didominasi oleh gaya pembangkit pasang surut dari matahari (S) dengan nilai amplitudo (A) sebesar 67,990 cm. Tipe pasang surut di Perairan Teluk Balikpapan adalah mixed, prevailling semidiurnal (campuran, condong ke harian ganda) dengan nilai Formzahl sebesar 0,33. Nilai MSL dari perhitungan Admiralty sebesar 1,42 m, nilai HHWL sebesar 3,30 m dan nilai LLWL sebesar -0,31 m. Pada tanggal 14 November 2019, nilai HHWL sebesar 2,90 m dan nilai LLWL sebesar 0,20 m. Pada tanggal 28 November 2019, nilai HHWL sebesar 2,80 m dan LLWL sebesar 0,20 m. Fase bulan pada tanggal 14 yaitu Waning Gibbous 94% dan pada tanggal 28 yaitu Waxing Crescent 5%.
Belajar Bahasa Inggris Berdasarkan “Inquiry Project” Bagi Mahasiswa Vokasi Di Politeknik Pertanian Negeri Samarinda
Authors: Suswanto  , Rachmadani Budi , Puspita
Published: June 2021

Penelitian ini bertujuan untuk menggambarkan dan memaknai inquiry project dalam proses perkuliahan pada program studi diploma tiga dan empat Politeknik Pertanian Negeri Samarinda yang bersifat inquiry. Jenis penelitian ini adalah penelitian kualitatif fenomenologi. Informan dalam penelitian ini adalah dosen mata kuliah Bahasa Inggris, staf administrasi pada program studi, pustakawan, mahasiswa. Semua informan tersebut merupakan sumber data primer yang berkenaan dengan proses kegiatan perkuliahan yang inquiry project. Data dikumpulkan dengan mengunakan pengamatan nonpartisipan, wawancara mendalam, dan dokumentasi. Penelitian ini menggunakan dua model analisis yaitu analisis saat mempertajam keabsahan data dan analisis melalui interpretasi data secara keseluruhan. Dalam hal ini ada empat tahap penting yang sangat berkaitan, yaitu: pengumpulan data, reduksi data, penyajian data dan penarikan kesimpulan atau verifikasi. Hasil penelitian menunjukkan bahwa proses pembelajaran yang bersifat inquiry project dapat ditemukan pada : demokratisasi di dalam proses perkuliahan praktek, kebebasan mahasiswa dalam mengembangkan potensinya, dan memelihara hubungan (care ralation) antara dosen dengan mahasiswa.
Agriculture Innovation Strategy to Support Food Security in Padang Pariaman District, West Sumatera Province
Authors: Yaarozatulo Harefa Herman
Published: June 2021

Public service can be defined as providing services (serving) the needs of people or communities who have an interest in accordance with predetermined basic rules and procedures. Public services view the public as a service target so that they are expected to be able to provide the best dedication in serving a more selective and educative public, as well as managing public policies run by the public bureaucracy. In order to create this, an application of innovation is needed. Innovation is an application or an effort to bring new ideas into implementation with a fairly large change of steps, lasts quite a long time and is quite general in scale. Padang Pariaman Regency is one of the rice producers in West Sumatra Province. Not only that, Padang Pariaman also has agricultural potential such as food crops, plantations, and so on. The agricultural sector is a sector that is able to survive and is utilized by the government to overcome the global economic crisis. For this reason, in addition to making innovations related to health and administration, the West Sumatra Provincial Government is focusing on increasing public service innovation in agriculture. This study aims to identify innovations in the West Sumatra Provincial Government related to improving public services within the Government. This research uses descriptive quantitative method. As a result, the Padang Pariaman Regency Government can improve food security, improve agricultural market information services, farm business administration, and increase plantation yields, which can facilitate and improve the lives of farmers. Suggestions for increasing public service innovation in the agricultural sector of Padang Pariaman Regency are expected that the Government can continue to evaluate the innovations that have been implemented.
Canadian university research libraries during the early days of the COVID-19 pandemic
Authors: Intahchomphoo Channarong , Brown Michelle
Published: June 2021

This paper documents the services and changes that library staff at a group of 15 Canadian university research libraries highlighted on their main pandemic pages and social media accounts during the early days of the coronavirus (COVID-19) pandemic. Findings suggest that libraries in the samples adopted the following services and changes: closing the physical libraries; suspending all physical collection services and in-person events; continuing to provide virtual reference services; promoting access and usage of electronic collections; suspending late fees and renewing checked-out items with a new due date; and advising users to wait before returning borrowed items. Notably, all libraries in this study are operating as full full-scale as digital libraries. This study will provide lessons learned to other libraries around the world to help in reviewing their own operational policies for coping with the current COVID-19 pandemic and for future global public health crises.
Comprehensive finite-element study of processes for the production of titanium strips by asymmetric cold rolling of a powder followed by sintering
Authors: Prykhodko I.Yu , Dedik M.O. , Brandt Stefan , Gogaev K.O. , Itsenko A.I , Voropaev V.S.
Published: June 2021

Finite-element numerical modeling was implemented and a study of the production processes of thin titanium strips was carried out on the basis of two key sequential processes: asymmetric powder rolling and sintering of the rolled product using the Brand-Nielson model. The results of studying the processes of compaction and sintering of titanium powder using a single mathematical model proposed by Jan Brandt are presented. For the calculations we used experimentally determined shear stresses and volumetric compression modulus under hydrostatic compression and uniaxial compression. The friction conditions between the surfaces of the rolls and the powder were determined as a function of the change in the Coulomb coefficient of friction on the relative sliding speed of the surfaces of the roll and the workpiece. An analysis of the results allows a quantitative assessment of the influence of the technology parameters of the compaction and sintering processes on the change in the stress state and relative density in the volume of products at the stages of production processes. It is shown that the application of the von Mises density and stress diagrams for the correction of the sintering regime allows avoiding the appearance of defects (insufficiently uniform density of the sintered material and the presence of microcracks) during intense heating of the metal in the furnace. The development of sintering modes based on the Brand-Nielson model simplifies the improvement of technology in the sintering of bulk bodies, which is a more time-consuming process than sintering of thin plates. This model can be used in the development of sintering regimes for various materials since it takes into account the influence of basic phenomena in this process. By varying the technology parameters it is possible to achieve targeted effects on product quality indicators and prevent the formation of microcracks in them.
Prediction of melting time of complex ferroalloys by physical and chemical modeling
Authors: Petrov A.F. , Snihura I.R. , Golovko L.A , Tsyupa N.A.
Published: June 2021

The purpose of this work is to implement a new approach to the description of the duration of melting (dissolution) of complex new generation ferroalloys during the deoxidation and doping of a metal melt. This approach is aimed at developing a methodology and criteria for the quantification and accounting of the micro-heterogeneity of multicomponent metal melts and their prediction on such important for steelmaking production characteristics as the melting time of ferroalloys, the description of the inter-mine interaction, which allows a deeper understanding of the process. deoxidation and refining of steel. In the work, the approach developed in the Institute of Ferrous Metallurgy of the National Academy of Sciences of Ukraine to solve problems of modeling of non-conformities that relate the composition, structure and properties of melts is used in the work. It is based on the original concept of physicochemical modeling of the processes of interatomic interaction in melts and solutions, developed by E.V. Prihodko. According to it, metal melts are considered as chemically unified systems. Changing their composition affects the complex of physicochemical properties due to changes in the parameters of their electronic structure. The method of calculation of criteria (∆Zy and d), characterizing the degree of difference between the electronic and structural state of the melt, as a chemically unified system, from the mechanical mixture of their initial components and the parameter was used to evaluate and account for the influence of the micron homogeneity of the structure of the metal melts of ferroalloy production. ρl, which takes into account the cluster spin in metal melts.
Using these criteria and the available experimental data, analytical dependences were obtained to calculate the melting time of complex (ma-manganese, vanadium, niobium and boromatic) ferroalloys of the new generation. This will allow them to evaluate their effectiveness of application, which is associated with the highest assimilation of the main elements that affect
Experimental studies of the melting points of CaF2, pegmatite, and mixtures thereof with lime
Authors: Stepanenko D.A , Skachko A.S. , Tsyupa N.A. , Snihura I.R.
Published: June 2021

Nowadays, one of the pressing issues is the problem of reducing material and energy costs in the production of certain types of products. Of particular importance are issues of slag formation due to the development of a ladle furnace (LF) plant for smelting special and alloyed steel grades with stringent requirements for the content of harmful impurities. Therefore, the question of choosing the rational composition of the slag-forming mixture (SFM) requires special attention. The aim of this work is to carry out research to solve the problems of improving the quality and competitiveness of manufactured metal products. The paper presents analytical and experimental studies of the phase composition and melting temperature of the CaF2-CaO system, which is the basis of the slag-forming mixture for refining steel in a ladle at domestic metallurgical enterprises. Previous studies on the replacement of fluorspar in the SFM with mineral raw materials of the domestic field showed that the alternative is the use of pegmatite from the Eliseevskoye field (Zaporizhzhya region). This contains alkali metal oxides Na2O and K2O, which affect both the decrease in slag viscosity of metallurgical production and the effect of desulfurization of the metal melt. Experimental studies of the melting points of fluorspar, pegmatite, and mixtures thereof with lime have been performed. Also, corundum and periclase-carbon refractory, which is usually used for lining the slag belt of LF buckets, were used as a substrate on which the process of melting of the studied materials and their mixtures took place. It is shown that pegmatite favorably affects the process of lime rarefaction and the formation of slag melt and can be used as a component of the SFM. The use of pegmatite can completely or partially replace fluorspar in the composition of the slag mixture with lime.
Comparative analysis of methods of heat treatment of railway rails and determination of further directions of increasing their operational reliability
Authors: Babachenko A.I. , Podolskyi R.V. , Kononenko G.A. , Safronova Е.А.
Published: June 2021

The analysis of normative and technical documentation is carried out, the characteristics influencing on wear resistance of railway rails are established, various modes of thermal treatment are considered. The results of measuring the hardness of the hot-rolled full-profile rail, made of steel, which is classified as steel of the K76F brand in accordance with the regulatory and technical documentation are given. The hardness of this rail corresponds to the strength class R260 or NT260 according to EN 13674: 1-2011 and GOST R 51685-2013 respectively, that is, from unalloyed steel without thermal hardening, intended for the production of turnouts and underground. On the basis of comparative analysis of various ways and modes of railway rail handling, further directions of increasing operational reliability are established by means of working out methods of heating, cooling. The microstructure of the experimental steel of the PCT after the furnace heating with cooling in various cooling media was studied: Calm air (20C/s), fan (3.40C/s), compressor (5.10C/s), water at a temperature of 800C (750C/s). It is established that at cooling rate 5.10C/s we obtain an even structure of highly dispersed perlite with hardness at the level of requirements of foreign standards. On the basis of technical sources and actual data it is established that volumetric heating with subsequent immersion of investigated samples from the steel of the PCT into an environment with a controlled cooling rate of ≈6.00C / s contributes to the passage of the zone of transformation of austenite into perlite α → γ with the reception of the structure of the perlite, as well as reaching a hardness of 415HB at a depth of 20 mm. It is shown that the use of furnace heating leads to the complete diffusion process, in which the concentration of carbon and other alloying elements is equalized throughout the volume of samples studied. The possible directions of increasing the mechanical properties of rails to obtain an even structure along the entire section of the rail head and to obtain hardness, which is regulated by foreign standards, are shown.
Thermocyclic treatment (TCT) of metals - way for getting optimum structures and properties
Authors: Perkov O.N. , Vakulenko I.A. , Kuzmychov V.M
Published: June 2021

The aim of this work is to study the basic principles of thermal cyclic processing (TCТ) of metals to obtain structures that determine the optimal complex of mechanical properties. The basic provisions of metal heating centers using periodically repeated heating and cooling cycles are given. The TCТ method, as a heat treatment method, is based on constant accumulation from cycle to cycle of positive changes in the structure of metals. Studies have shown that with rapid heating, the growth of austenitic grain occurs slowly and, therefore, heating to high temperatures (up to 10000C) does not lead to an intensive increase in grain. It has been established that grain size increases at a variable heating temperature 3 times slower than under isothermal conditions at the corresponding temperature. Provided that the growth rate of the new phase (austenite) is small and the nucleation rate of grains is significant, it turns out that by the end of the a®g transformation, a fine-grained structure is retained. Further heating or holding at a constant temperature leads to a rapid coarsening of austenite grains. If cooling (for example, in air) of rapidly heated steel is performed 10–150C higher than the temperature of the Ас1 point, then fine perlite grain is formed due to reverse recrystallization. With one thermal cycle, ferrite in subeutectoid steels almost does not undergo changes. But if several such heating and cooling are performed, then the entire ferrite-pearlite structure undergoes a change. It has been established that the higher the heating rate during heating and heating and the less overheating above Ас1, the finer the grain in carbon structural steel. However, this increases the need to increase the number of heat treatment cycles. The mechanism of structure formation explaining these phenomena and practical recommendations on the implementation of the process of the technical and economic process are presented. This approach makes it possible to form the optimal metal structure. At the same time, opportunities can be significantly expanded in terms of obtaining materials with desired properties and improving on this basis machines, structures, individual units and parts. All this puts TCТ in the category of promising areas in metalworking.
Creative way of the Iron and Steel Institute of NAS of Ukraine. 80 years
Authors: Babachenko A.I. , Garmash L.I. , Tuboltsev L.G.
Published: June 2021

The history of the creation of the Iron and Steel Institute named after
Z.I. Nekrasov National Academy of Sciences of Ukraine (HMI). The main stages in the
history of the HMI, its leaders and directions of scientific research are presented. The
foundations of scientific topics and reputable scientific schools were laid by outstanding
scientists of the Institute, who have not lost their relevance at the present time. It is
shown that the creation and establishment of the HMI was determined by the need to
develop the country's ferrous metallurgy. The origins of creating the scientific topics of
the Institute, which covered all the main stages of ferrous metallurgy, are given. Major
scientific developments created by the staff of the Institute for the first time in world and
domestic practice, which currently form the basis of world metallurgy, are presented.
The analysis shows that the strategic direction of the development of domestic
metallurgy in the future is the evolutionary change in metallurgical technologies. In this
regard, the Institute develops the main directions of scientific and technical support of
technologies for blast furnace, steelmaking and rolling production, heat treatment of
rolled products. The examples of modern scientific developments of the Institute are
given. The research areas of the Institute of Ferrous Metallurgy of the National
Academy of Sciences of Ukraine cover a wide range of problems in the production of
metal products and are complex, which is an important advantage in modern
metallurgical production. The HMI has a serious scientific potential for the latest
modern technological and technical solutions for domestic metallurgical production,
which at the development stage are being adapted to the existing technological and raw
material conditions in Ukraine. Most of the new developments in technological content
and intellectual level of implementation are not inferior to world analogues and are
widespread in world practice.
Trends in the development of energy-saving technologies in metallurgy
Authors: Babachenko A.I. , Tuboltsev L.G.
Published: June 2021

The purpose of the analysis is to identify trends in the development of
metallurgical production and the use of energy-saving metallurgical technologies. It is
shown that the world continues a steady trend of increasing steel production. This
indicates an increase in metal consumption in industry. Despite the downward trend in
steel production in Ukraine, the attention of metallurgists to the use of energy-saving
technologies has not diminished. Trends and examples of the use of energy-saving
technologies in world practice in comparison with trends in domestic metallurgy are
given. Perspective technologies of blast furnace, steelmaking and rolling production are
shown. Their advantages and disadvantages are noted. It is shown that the production
volumes of metallurgical products are closely related to the technical level of production
and the structure of steel smelting. It is noted that the development trends of domestic
metallurgical production on a general basis coincide with the development trends of
world metallurgy. The advantages and disadvantages of domestic ferrous metallurgy are
shown. The directions of scientific research of the Iron and Steel Institute named after
Z.I. Nekrasov NAS of Ukraine (ISI), which correspond to global trends in the
development of metallurgy and cover the whole range of problems in the production of
metal products. The developments are comprehensive, which is a very important
advantage in the modern world. The ISI has a serious scientific potential for the latest
modern technological and technical solutions for domestic metallurgical production,
which are already at the development stage adapted to existing technological and raw
materials conditions and their changes. Most of the new developments in technological
content and intellectual level of implementation are not inferior to world analogues.
Stages of scientific and applied activities of the department of external processing of the iron of ISI NANU
Authors: Shevchenko A.P. , Kislyakov V.G. , Dvoskin B.W. , Vergun A.S. , Manachyn I.A. , Petrusha V.P. , Shevchenko S.A
Published: June 2021

The history of the creation and development of the research unit of the Iron and Steel Institute, the department of after-furnace treatment of cast iron is presented. From 1939 to 1983, this structural unit of the ISI was headed by Doctor of Technical Sciences, Professor Natalya Aleksandrovna Voronova, then for 34 years, until 2017, the student and associate of N.A. Voronova – Doctor of Technical Sciences, Professor Shevchenko A.F., from 2017 to the present, the department is headed by Kislyakov V.G. During this period, a set of scientific research and development has provided an opportunity for the department staff to defend 3 doctoral and 16 master's theses. Two employees of the department were awarded the academic title of professor, and ten – senior research assistant. The evolution of the technological process and equipment for the processing of cast iron by granular magnesium in ladles of various capacities is shown. In particular, it was not possible to inject granular magnesium without additives with lances used to inject mixtures of magnesium with fillers into the melt due to blockage of the channel of the magnesium wire at the outlet of the lance. To solve this problem, a lance of a new design was developed, at the outlet of the channel of which an evaporation chamber was installed, the task of which was to remove the section of the lance channel from direct contact with cast iron. The design of tuyeres with evaporation chambers made it possible to virtually eliminate blockages of the tuyere channel. The studies of the interaction of magnesium with molten iron became the scientific basis for the creation of a modern highly automated process for the secondary refining of cast iron by mono-injection of magnesium without additives. This technology received the most successful application in the creation of modernized complexes at Chinese enterprises. Since 2001, 84 complexes of out-of-furnace desulphurization of pig iron and slag download using ISI technology with a total capacity of over 100 million tons/year of low-sulfur and pig iron-free slag have been built and commissioned at 39 plants in China.
Penerapan Face Recognition Pada Sistem Presensi
Authors: Andri  Nugraha Ramdhon  , Fadly Febriya
Published: June 2021

The development of digital image technology is increasing nowadays. However, the use of image technology on surveillance cameras has not been optimally utilized. On the other hand, the various presence data monitoring systems that currently exist have their respective advantages and disadvantages, and need to be continuously developed so as to facilitate the data processing. The student attendance system at STT Bandung is basically good but it is still not optimal. The process of collecting student attendance data is still quite time-consuming and still allows human errors to occur in the data input process. Therefore, the author intends to help overcome this by utilizing face recognition technology in an integrated presence process. LBPH (Local Binary Pattern Histogram) is currently the best method in face recognition technology because the detection and recognition process is relatively fast and has the highest level of accuracy when compared to other methods. After testing the resilience of the system from the results of the prototyping that was built, the results obtained with a success rate of 86.85%.
Principles of fostering scientific language of Physics by mountainous high school students
Authors: Le Diep Ngoc , Do Tra Huong
Published: June 2021

Language is an instrument of communication and thinking. During the development of the scientific disciplines, a separate system of language called scientific language has been formed; language of Physics is also formed and plays an important role in the history of Physics. In the context of Vietnamese mountainous students, fostering scientific language in general and Physic language in particular is very necessary; it contributes to the academic success of students by researching documents on fostering language in scientific context, coordinated with characteristics about language and communication of students in mountainous areas in Vietnam. The article introduces 4 principles to learn the language of Physics and an example of planning lessons in teaching Physics to support students in mountainous areas in Vietnam.
Childcare and education quality assurance at private preschools: A case study in Hanoi, Vietnam
Authors: Nguyen Thao Bich Thi
Published: June 2021

Research on quality assurance (QA) over nurturing, caring and educating preschool children is an urgent and crucial issue, especially at private preschools. Using questionnaire survey methods, the study evaluates the situation of ensuring the quality of nurturing and educating children in private preschools regarding the following main aspects: establishing quality standards of child nurturing and education; building a quality assurance system and procedure for preschools’ childcare and education; financial and infrastructure conditions for QA activities to nurture and educate children; the community’s participation into private preschools’ activities; developing a culture of preschools’ childcare and education quality. The research significance lies in the implications from the results to improve QA of nurturing and educating children in private preschools in Hanoi, Vietnam.
Comparison of in Vitro Vasculogenesis Potential between ASCs with BM-MSCs
Authors: Panjaitan Ani Oranda , Sukmawati Dewi , Anggraeni Ria
Published: June 2021

Tube formation assay is the most widely used method as a vasculogenesis/ angiogenesis test in vitro. Mesenchymal stem cells (MSCs) are multipotent adult cells. The paracrine effect of MSCs on neovascularization is well known. In general, MSCs do not express CD34 hematopoietic surface marker, but according to some experts, bone marrow mesenchymal stem cells (BM-MSCs) express CD34 in vivo and lose their expression when they are cultured in vitro, while adipose-derived stem cells (ASCs) still have CD34 expression in the early passages when cultured in vitro. BM-MSCs are the most widely used MSC, but ASCs are also used in stem cell therapy and tissue engineering for angiogenesis purposes. Until now, the potential of vasculogenesis between ASCs and BM-MSCs is still unclear. Expression of CD34 is also unknown whether affecting the quality of tube formation. This study wanted to compare the potential of vasculogenesis between ASC and BM-MSCs through tube formation test and CD34 expression.Measurements of vasculogenesis quality showed higher tube length, number of loopsand mean number of branch points on BM-MSC. Both BM-MSCs and ASCs showed low CD34 levels.BM-MSCs showed better tube formation ability compared with ASCs. No association was found between CD34 levels and MSC vasculogenesis capability.

Key words: ASCs, BM-MSCs, CD34, matrigel, tube formation.
Bioactivity of Kemangi Leaves (Ocimum sanctum) and Ruku Leaves (Ocimum tenuiflorum)
Authors: Rahmawati Fri , Silaban Hertina
Published: June 2021

Kemangi (Ocimum sanctum) is commonly used as a vegetable (fresh vegetables) and traditional medicine in Indonesia. Kemangi leaves have been empirically used as an alternative medicine for wound healing. Apart from kemangi, a morphologically similar plant to kemangi, namely ruku ruku, is often used by Indonesians as a cooking spice. The leaves of ruku ruku (Ocimum tenuiflorum) have been empirically used in various alternative medicine, namely to treat fever, cough, gout, nerves, mouth sores, tinea versicolor, nausea and vomiting. The research was conducted to determine the antimicrobial activity (antibacterial and antifungal), antioxidants and phytochemical analysis of the ethanol extract of kemangi leaves and ruku ruku leaves. The extraction method used is the maceration method using 96% ethanol as a solvent. The antimicrobial test was carried out using the agar diffusion method. The bacteria used are Salmonella typhi, Staphylococcus aureus, while the fungi used are Candida albicans. Phytochemical analysis used the Harbone method, and the antioxidant test used the 1,1-Diphenyl-2-picryl Hidrazil (DPPH) method. The results showed that the extracts of kemangi and ruku ruku leaves contained flavonoid and steroid compounds. The antimicrobial test results showed that only ruku ruku leaves inhibited the growth of Staphylococcus aureus with an inhibition zone of 9.35 mm, and the two extracts used could not inhibit the growth of the fungus Candida albicans. In contrast, the results of the antioxidant test showed that the ruku ruku and kemangi leaf extracts had an antioxidant activity with inhibition concentration 50 (IC50) values of 225.64 ppm and 455.11 ppm.

Keywords: Bioactivity, Kemangi, Phytochemicals, Ruku.