bluuebunny/crossref_metadata_2025_split huggingface dataset:
Features of the influence of intermediate rail fastenings on the operational durability of rails
Authors: Kuznetsova N. V. , Sidorova E. A. 
Published: September 2021

Heat-strengthened rails of the R65 type are the main type of rails used on the railway network of Russian Railways. Reducing the number of cropped and acutely defective rails is possible due to the rational use of the design features of intermediate rail fasteners and their current content.The article presents study results of the stiffness influence of intermediate fasteners on the operational durability of rails. The general statistics of the use of various types of intermediate rail fastenings on the network of Russian railways is considered. The main results of previously published studies on the effect of the stiffness of intermediate rail fasteners on the accumulation of contact fatigue damage in rails are briefly presented.Calculations of the accumulation of contact-fatigue damages in rails, carried out by the authors, are based on the data on the vertical and horizontal transverse stiffness of intermediate rail fastenings obtained from the results of bench tests. Calculations of the accumulation of contact-fatigue damage were carried out using the “Universal Mechanism” software package. In the process of modeling, four types of intermediate rail fasteners were considered: ARS-4, ZhBR-65Sh, ZhBR-65PShM and W-30. Calculation results were obtained for a curve with a radius of 650 m on a continuous welded track section.
Ảnh hưởng của một số yếu tố môi trường lên khả năng phân hủy phenol của ba dòng nấm men
Authors: Nghĩa Nguyễn Khởi , Luan Do Thanh , Thien Nguyen Huu , Ty Tran Hoang 
Published: September 2021

Phenol là một hợp chất hữu cơ thơm có công thức phân tử C6H5OH, có tính độc hại cho con người và động vật, thường được tìm thấy trong nước thải và bùn cống rãnh. Mục tiêu của nghiên cứu nhằm khảo sát ảnh hưởng của một số yếu tố môi trường lên khả năng phân hủy phenol của ba dòng nấm men phân lập từ mẫu đất bùn đáy ao ở khu xả nước thải từ phòng thí nghiệm thuộc Khoa Nông nghiệp, Trường Đại học Cần Thơ. Việc khảo sát các yếu tố môi trường gồm pH, nhiệt độ, nồng độ muối, nguồn đạm và nguồn carbon được thực hiện trong môi trường khoáng tối thiểu lỏng bổ sung 500 mg.L-1 phenol. Nồng độ phenol trong môi trường nuôi cấy lỏng được xác định bằng phương pháp so màu với thuốc thử Folin – Clocalteu’s ở bước sóng 758 nm. Kết quả nghiên cứu cho thấy cả ba dòng nấm men phân lập có khả năng phân hủy rất tốt phenol ở điều kiện môi trường pH từ 5 đến 7, khả năng chịu mặn lên đến 1,5% NaCl, nhiệt độ 30oC và nguồn đạm (NH4)2SO4. Tóm lại, kết quả cho thấy ba dòng nấm men thử nghiệm có tiềm năng ứng dụng cao trong việc xử lý đất và trầm tích ô nhiễm với phenol.
Phân lập một số hợp chất từ thân rễ ngải tím (Kaempferia parviflora Wall. Ex Baker), họ gừng (Zingiberaceae)
Authors: Tri Mai Dinh 
Published: September 2021

Năm hợp chất bao gồm 5,7-dimethoxyflavone (1), 3,5,7-trimethoxyflavone (2), di-O-methylpinocembrin (3), bisdemethoxycurcumin (4), aloe-emodin (5) được phân lập từ dịch chiết n-hexane thân rễ Ngải tím Kaempferia parviflora (họ Gừng). Cấu trúc hóa học các hợp chất được xác định bằng các phương pháp phổ nghiệm kết hợp với so sánh cấu trúc với tài liệu tham khảo. Trong đó các hợp chất phân lập 4, 5 lần đầu tìm thấy trong loài Kaempferia parviflora
Các yếu tố ảnh hưởng đến sinh kế của cư dân vùng hạn mặn ở Đồng bằng sông Cửu Long
Authors: THUAN PHAN , Dung Nguyen Tien 
Published: September 2021

Mục đích của bài viết là nhận diện các yếu tố ảnh hưởng đến kết quả sinh kế của cư dân vùng hạn mặn ở đồng bằng sông Cửu Long. Số liệu của nghiên cứu được thu thập từ 300 nông hộ ở Sóc Trăng, Kiên Giang và Trà Vinh với phương pháp chọn mẫu ngẫu nhiên, mỗi tỉnh lựa chọn 02 huyện và mỗi huyện lựa chọn 01 xã. Phương pháp phân tích hồi quy đa biến được dùng trong nghiên cứu này nhằm xem xét các yếu tố ảnh hưởng đến kết quả sinh kế của cư dân vùng hạn mặn. Kết quả nghiên cứu cho thấy, thu nhập là một trong những yếu tố của kết quả sinh kế và có nhiều yếu tố ảnh hưởng đến thu nhập của cư dân vùng hạn mặn. Vốn vay có mối quan hệ ngược chiều, trong khi đó đất sản xuất nông nghiệp, số nguồn thu nhập, kinh nghiệm, hỗ trợ của địa phương, số phương tiện sản xuất có mối quan hệ cùng chiều với thu nhập. Trên cơ sở đó, một số giải pháp được đề xuất nhằm giúp người dân thích ứng với hạn mặn trong thời gian tới tại địa bàn nghiên cứu.
Effect of Well Resistance on Time Factor Ratio Due to PVD Deformation
Authors: Chrismaningwang Galuh , Hardiyatmo Hary Christady , Adi Agus Darmawan , Fathani Teuku Faisal 
Published: September 2021

One of the most common soft soil enhancement techniques used to expedite the consolidation time significantly is Prefabricated Vertical Drains (PVD). This technique needs a sufficient discharge capacity value because it primarily functions as a drainage channel. The deformation of PVD is considered as one of the primary factors which affect discharge capacity. Therefore, this research determined the influence of upper-side deformation on PVD's discharge capacity (qw) using a specific design apparatus known as ASTM D4716, which manages the determination of transmissivity and flow rate at the longitudinal direction of geosynthetics. Furthermore, two PVD samples with dimensions of 3 and 4 mm thickness, 100 mm width, and 1000 mm length were examined under straight and buckled conditions. Stepwise confining pressures from 50 to 200 kPa were subjected to the samples under hydraulic gradients with values of 0.2, 0.5, and 1.0. The results showed that samples with greater thickness had higher discharge capacity, which significantly reduced in the lower hydraulic gradient. The deformation on the upper side of PVD induced a decrease of discharge capacity by approximately 13-16%, which led to a delay in the consolidation time. The discharge capacity values obtained from the experiments were employed as parameters in a time factor ratio of Th,w/Th. The analysis results show that the buckled PVD has a more considerable consolidation time due to the increase in the Th,w/Th ratio, with a discharge capacity value below 10-4 m3/s. It can be concluded that the deformation in the form of buckled conditions on the upper side of PVD had a considerable impact on PVD effectiveness.
Comparison of Iron Dosing Strategies in Patients Undergoing Long-Term Hemodialysis
Authors: Bielesz Bernhard , Lorenz Matthias , Monteforte Rossella , Prikoszovich Thomas , Gabriel Michaela , Wolzt Michael , Gleiss Andreas , Hörl Walter H. , Sunder-Plassmann Gere 
Published: September 2021

Background and objectives
Whether iron supplementation in patients on hemodialysis could be delivered by less frequent but higher single doses compared with the currently more common higher-frequency schedules of lower single iron doses is unknown.

Design, setting, participants, & measurements
We carried out an open-label, randomized, controlled noninferiority trial over 40 weeks in patients on prevalent hemodialysis (n=142). We administered in total 2 g iron as 100 mg iron sucrose biweekly in a continuous (20 × 100 mg) fashion or 500 mg ferric carboxymaltose every 10 weeks in a periodic (4 × 500 mg) fashion. The primary end point was the change in hemoglobin at week 40 from baseline with a noninferiority margin of −0.8 g/dl. Secondary end points were changes in ferritin, transferrin, transferrin saturation, and erythropoiesis-stimulating agent use.

Results
In total, 108 patients completed the study. At 40 weeks, hemoglobin changed by −0.27 g/dl (95% confidence interval, −0.64 to 0.09) in the iron sucrose arm and by −0.74 g/dl (95% confidence interval, −1.1 to −0.39) in the ferric carboxymaltose arm compared with baseline. Noninferiority was not established in the per-protocol population as hemoglobin changes compared with baseline differed by −0.47 g/dl (95% confidence interval, −0.95 to 0.01) in the ferric carboxymaltose arm compared with the iron sucrose arm. Proportional changes from baseline to week 40 differed by −31% (98.3% confidence interval, −52 to −0.1) for ferritin, by 1% (98.3% confidence interval, −7 to 10) for transferrin, and by −27% (98.3% confidence interval, −39 to −13) for transferrin saturation in the ferric carboxymaltose arm compared with the iron sucrose arm. Erythropoiesis-stimulating agent dosing did not differ between groups. The overall number of adverse events was similar; however, more infections were observed in the iron sucrose arm.

Conclusions
An equal cumulative dose of ferric carboxymaltose administered less frequently did not meet noninferiority for maintaining hemoglobin levels compared with iron sucrose administered more frequently.

Clinical Trial registry name and registration number:
Comparison Study of Two Iron Compounds for Treatment of Anemia in Hemodialysis Patients (COPEFER), NCT02198495
[ID 55905] MISOPROSTOL PARA INDUÇÃO DO PARTO: ABORDAGEM FARMACOEPIDEMIOLÓGICA E AVALIAÇÃO DO IMPACTO NA REDUÇÃO DE CESÁREAS
Authors: Marcella Koch Daeska , Dantas Rattmann Yanna 
Published: September 2021

Objetivo: Avaliar o uso do misoprostol para a indução do trabalho de parto em gestantes atendidas em um hospital público do Estado do Paraná e analisar a redução da prevalência de cesáreas após a inserção deste medicamento no estabelecimento. Metodologia: Estudo observacional transversal, com abordagem descritiva e analítica por meio de dados clínicos e epidemiológicos de todas as gestantes atendidas no hospital maternidade, no período entre julho de 2015 e junho de 2017. A análise estatística foi realizada pelo software Epi-info 6.04®. A significância estatística foi aceita ao nível de 95% (p≤0,05). Resultados: Foram identificadas 362 prescrições destinadas a gestantes majoritariamente adultas jovens (64,1%), casadas (61,9%), brancas (58,6%), com ensino fundamental incompleto (16,0%), residentes em área urbana (78,2%), primíparas (60,8%), com 41 semanas de gestação (40,9%). As gestantaes foram tratadas, predominantemente com um único comprimido de misoprostol, para a indicação principal de gestação prolongada. O parto vaginal foi obtido somente em 48,62% dos casos, sobretudo em não primíparas (p=0,004). Nas gestantes com maior paridade a quantidade necessária de comprimidos de misoprostol para atingir o desfecho (parto vaginal), foi menor (p=0,021). Conclusão: Ocorreu um discreto aumento no número de partos por cesárea no hospital, indicando que a disponibilidade do misoprostol na maternidade não ocasionou a redução de cesáreas.
Pengaruh Asam Itakonat terhadap Properti Polimer Perekat Akrilik Berbasis Air
Authors: Sihombing Rony Pasonang , Ngatin Agustinus 
Published: September 2021

Acrylic-based polymer adhesive is a type of adhesive that can be used for pressure sensitive adhesive (PSA). Itaconic acid (IA) is a type of acid with 2 (two) OH groups which can form hydrogen bonds. The acrylic base can be used purely from its class. In some cases, however, the acrylic base can be used together with another base. Therefore acrylic-based adhesive with variable addition of itaconic acid was introduced in this study. In this application, the holding power property is one of the important parameters of a PSA. Therefore, holding power is the main parameter in this study. This research includes the preparation of tools and materials, mixing the main raw materials of acrylic monomer and itaconic acid with the types of surfactants and water, and product characterization. The polymerization process is carried out at a pressure of 1 atm with a temperature of 75°C - 80°C accompanied by stirring with a rotation rate of ± 500 rpm. The characterization of this research resulted in a PSA product with a holding power of 2 kg for 30 seconds to 620 minutes. While the resulting peel strength is 1.12 kgf / inc to 0.76 kgf / inc.
Keywords: itaconic acid, acrylic PSA, holding power
Introduction of the organizational and economic mechanism of the activation of intellectual and innovative determinants of the regional economic development
Authors: Tulchynska Svitlana , Popelo Olha , Kovalenko Nataliia , Makaliuk Iryna , Tur Olena 
Published: September 2021

In the article, functional, systemic and process approaches to the formation of the organizational and economic mechanism of the activation of intellectual and innovative determinants of the regional economic space development in the conditions of creative economy are investigated. Within the framework of the functional approach, institutional, legal and normative influence on the activation of intellectual and innovative determinants of the regional economic development is implemented. It is substantiated that the main functional components of the mechanism are intellectual-innovative, financial-investment, technical-technological, institutional-legal, information-logistic, ecological and material-resource. From the standpoint of a systematic approach, the mechanism of activating the determinants of the regional development in creative economy should be considered as a set of subjects, objects, methods, tools, as well as subsystems of targeted impact and methodological support, resource and infrastructure support, evaluation indicators and adjusting regulators.
ANALISIS PENTINGNYA PENGEMBANGAN MODUL BIOLOGI BERBASIS POTENSI LOKAL DENGAN MENGINTEGRASIKAN NILAI-NILAI KEISLAMAN
Authors: Susilawati Yuni , Muhfahroyin Muhfahroyin 
Published: September 2021

Pendidikan memiliki peran yang sangat penting dalam rangka pembangunan bangsa dan negara. Pendidikan merupakan bagian dari pembinaan mental yang diarahkan pada upaya mencerdaskan kehidupan bangsa dan pembangunan segenap pribadi untuk mengisi kemerdekaan bangsa dan Negara Kesatuan Republik Indonesia. Potensi lokal sekolah merupakan wahana pembelajaran biologi yang dapat diangkat sebagai sumber belajar dan hasil penggalian dapat disusun dalam bentuk bahan ajar yang dikemas dalam bentuk media pembelajaran berupa modul biologi. Penyusunan kegiatan pembelajaran didasarkan pada potensi sekolah berupa potensi lingkungan sekolah. Objek permasalahan biologis yang ada pada potensi lokal sekolah antara lain: (1) Struktur fungsi tumbuhan di sekitar halaman sekolah, baik morfologi maupun anatomi; (2) Fisiologi tumbuhan, misalnya proses fotosintesis jika dikaitkan dengan intensitas cahaya dan kandungan klorofil daun; (3) Penyakit tanaman dan penyakit di sekitar halaman sekolah; (4) Ekosistem. Untuk memanfaatkan peluang besar tersebut, penelitian ini bertujuan untuk menganalisis pentingnya pengembangan modul pembelajaran. Pembuatan modul pembelajaran ini menggunakan model 4D yang merupakan model pengembangan yang terdiri dari 4 tahap.
Abstract: Education has a very important role in the framework of building the nation and state. Education is part of mental development that is directed at efforts to educate the life of the nation and the development of the whole person to fill the independence of the nation and the Republic of Indonesia. The local potential of the school is a vehicle for learning biology, which can be appointed as a source of learning and the results of the excavation can be organized in the form of teaching materials, which are packaged in the form of instructional media in the form of biology modules. The preparation of learning activities is based on the potential of the school in the form of the potential of the school environment. The objects of biological problems that exist in the local potential of schools include: (1) The structure of plant functions around the school grounds, both morphology and anatomy; (2) Plant physiology, for example the process of photosynthesis if associated with light intensity and leaf chlorophyll content; (3) Plant diseases and diseases around the school grounds; (4) Ecosystems. To take advantage of this great opportunity, this study aims to analyze the importance of developing learning modules. The making of this learning module uses the 4D model which is a development model consisting of 4 stages.
Educación Inclusiva. Un desafío y una oportunidad para la innovación educativa en la formación inicial del profesorado
Authors: Ramos Noble Ana María 
Published: September 2021

Esta reseña pretende ser un punto de pausa y sosiego que trata de atesorar las claves del libro Educación Inclusiva. Un desafío y una oportunidad para la innovación educativa en la formación inicial del profesorado, para acercar, a sus posibles lectoras y lectores, al viaje por las páginas del trabajo de una Red de docentes que ha sido tejido con mimo y sostén; un libro que trata de aunar las reflexiones y las preocupaciones que estos docentes tienen en torno a la formación inicial de las y los profesionales de la educación y en relación a dos temas actuales en educación: la inclusión y la innovación educativa.
Modeling and Simulation of the Methane Risk in the Mining Production Process
Authors: Palka Dorota 
Published: September 2021

Abstract
The mining production process is of particular importance for the area of Upper Silesia, as well as a very significant impact on the economy of the entire country. One of the most common and most dangerous threats to this process is the methane hazard. It is related to the presence of methane in coal seams, which under appropriate conditions is a flammable and explosive gas. Events related to the methane hazard constitute a huge threat to the life and health of the crew as well as the infrastructure and equipment of excavations. Therefore, they have a huge impact on the efficiency of the entire mining production process. In order to ensure the safety and continuity of the production process, it is necessary to prevent the formation of dangerous methane concentrations in the area covered by the operation. One of the tools that can be used to assess the state of methane hazard are model studies supported by numerical simulation. Based on these studies, the article analyzes the distribution of methane concentration in the mining area. This area included an actual mining excavation in one of the hard coal mines. The model tests were carried out with the use of the finite volume method in the ANSYS Fluent software. The obtained results can be used for preventive measures and constitute an important source of information for the assessment of the methane hazard state.
Multi-Criteria Assessment of Ergonomic Conditions of Work. Case Study
Authors: Korban Zygmunt 
Published: September 2021

Abstract
The supervision of OHS conditions (working conditions and the realization of work tasks) is one of the basic obligations of the employer. The number and variety of describing elements (and thus being subject to assessment) means that synthetic measures (measures that are one-dimensional images of complex phenomena) are more and more frequently applied to solve problems of that type. Although the methods of multivariate statistics used for this purpose differ in the way they treat assessment criteria (defining mutual dependency thresholds, unifying the field of compared criteria), the final effect of their application always offers the option to replace the entire set of features describing a given object with one variable (aggregate). The article presents a potential applicability of one of the so-called discrete multi-criteria decision-making methods (Simple Additive Weighting), which allows to determine a linear combination of normalized elements of the decision matrix and the elements of weight vector. As part of the article, the working conditions at 5 workstations were assessed (a miner’s workstation in 5 underground mine workings being excavated), taking into account 8 assessment criteria (6 were cost criteria and 2 – criteria of qualitative character). In effect of the application of the Simple Additive Weighting method, we could determine the ranking vector R, which allowed to order the examined objects and to carry out a comprehensive assessment of OSH conditions occurring in them.
Towards a Self-Service Approach in the Printing Industry. An Investigation of State of the Art Technologies Along with Industry 4.0 Changes
Authors: Urban Wiesław , Łukaszewicz Krzysztof 
Published: September 2021

Abstract
It is commonly believed that the current economic state of many countries is at the stage of the fourth industrial revolution. The changes resulting from this revolution are affecting all sectors of the economy, including the printing sector. The aim of this article is to analyse the state of the art technology in sheetfed printing and then to identify the challenges for further changes in the technology of this type of printing as well as technological and organisational changes in the processes of preparation and realisation of printing products. The article uses case studies of selected technologies offered by key technology suppliers in this area and case studies of selected business entities – manufacturers of printing products. The research approach adopted in this article also takes conceptual work into account. It was found that the observed changes in the printing industry are consistent with the assumptions of the Industry 4.0 concept in the aspect of the digitisation and mass personalisation of products, which leads to the thesis that in the future personalised digital printing ordered through self-service will play a dominant role.
Determination of Traffic Noise on the Selected Area of the City of Zabrze
Authors: Kuboszek Artur , Boczkowski Arkadiusz , Kocot Paweł , Midziak Marcin , Pociask Julia , Przybyła Krystian , Radziejewska Klaudia , Rosół Katarzyna 
Published: September 2021

Abstract
The article is a substantive summary of research conducted by the Institute of Production Engineering of the Silesian University of Technology in Zabrze, covering the determination of ways to reduce traffic noise in the selected area of the city of Zabrze using measurement and simulation methods. The analysis was conducted within the Project Based Learning (PBL) project which aimed at teaching a selected group of students teamwork, synthesizing information from various sources, making decisions and taking responsibility for them, planning and organizing work and proper time management.
Analysis of the Possibility of Using Unmanned Aerial Vehicles and Thermovision for the Stocktaking of Big Game
Authors: Boczkowski Arkadiusz , Kuboszek Artur , Mańka Adam , Dutkiewicz Karolina , Gramatyka Wiktoria , Leśniak Aleksandra , Spyrka Magdalena , Stawinoga Ewa 
Published: September 2021

Abstract
Classic methods of stocktaking big game living in a given area have many disadvantages. The main result is the need to ensure appropriate terrain and weather conditions and also require the involvement of a large number of people, so-called observers. The development of technology makes it possible to create new stocktaking methods that will not have as many of the above-mentioned disadvantages, while reducing the cost of stocktaking and increasing its accuracy. This paper presents an analysis of the possibility of using unmanned aerial vehicles, so-called drones, in combination with the observation of game in the infrared wave range with the use of a thermal imaging camera. The paper presents the concept of such a solution, which will of course be further developed. Raids are planned with the use of thermal cameras over areas according to strictly defined transects and subjecting the obtained images to analysis, also with the use of artificial intelligence methods. This article was written as part of the PBL project carried out by a group of students from the Silesian University of Technology under the supervision of dr inż. Arkadiusz Boczkowski.