bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pregnancy outcome of patients with septic shock complicating pregnancy: a retrospective study
Authors: Li Manyu , Yin Jie 
Published: January 2020

Abstract
Background: To detect the maternal and neonatal outcomes of late pregnant patients complicated with sepsis shock.Methods: The medical records of all late pregnant patients (>=28 weeks) complicated with septic shock from January 2011 through November 2018 in Peking Union Medical College Hospital were retrospectively reviewed. Pertinent literature was identified by searching PubMed and EMBASE.Results: A total 9 patients with an average age of 26.11±6.9 years were included in this study. And the mean gestational age at diagnosis of septic shock was 33 weeks plus 1 day. 87.5% of patients accepted emergency delivery, in which cesarean section was the main delivery mode. 7 patients underwent emergency delivery (including 3 cases of fetal death) and 3 cases of live births (including 1 case of mild neonatal asphyxia). The total maternal mortality rate was 33.3%, and neonatal death rate was 55.6%. Only 1 patient continued pregnancy after disease recovery. 15 published case reports were reviewed. The reported maternal and perinatal death rates were 20% and 46.7% respectively. 2 patients could continue pregnancy after treatment. Group A streptococcus was considered as the main pathogenic bacteria.Conclusions: Late pregnancy complicated with septic shock was associated with high maternal and fetal mortality. Emergency delivery was advised in most of patients. And cesarean section was the main mode of delivery.
Polymerization during melting of ortho- and meta-silicates: Effects on Q species stability, heats of fusion, and redox state of mid-ocean range basalts (MORBs)
Authors: Nesbitt H. Wayne , Bancroft G. Michael , Henderson Grant S. 
Published: January 2020

Abstract29Si NMR and Raman spectroscopic studies demonstrate that fusion of crystalline orthosilicates and metasilicates produces melts more polymerized than their precursor crystals. Forsterite, for example, consists of 100% Q0 species, whereas its melt consists of ~50 mol% of Q1 species (Q = a Si tetrahedron and the superscript indicates the number of bridging oxygen atoms in the tetrahedron). Polymerization during melting can be rationalized from an energetics perspective. Si-NBO-M moieties of Q species are more susceptible to librational, rotational, and vibrational modes than are Si-BO-Si moieties (NBO = non-bridging oxygen; BO = bridging oxygen; M = counter cation). Thermal agitation activates these additional modes, thus increasing the CP and free energy of melts. The reaction of Qn to Qn+1 species during melting eliminates Si-NBO-M moieties and produces Si-O-Si moieties that are less susceptible to the additional modes, thereby minimizing the CP of melts. By decreasing the abundances of Q0, Q1, and Q2 species in favor of Q3 and Q4 species, melts become more stable. In the absence of polymerization, melting temperatures of minerals would be appreciably greater than observed.Polymerization involves formation of Si-O bonds, which are strongly endothermic (Si-O bond dissociation is ~798 kJ/mol). The large heats of fusion (ΔHf) of orthosilicates result primarily from polymerization reactions during melting (ΔHf of forsterite, fayalite, and tephroite are ~142, ~92, and ~90 kJ/mol). The fusion of metasilicates and sorosilicates (e.g., pyroxenes and melilites) involves endothermic polymerization and exothermic depolymerization reactions, although the former dominates. These reactions tend to negate each other during melting, yielding less positive ΔHf values than observed for orthosilicate fusion (e.g., ΔHf of enstatite, diopside, pseudowollastonite, and åkermanite are ~73, ~69, ~57, and ~62 kJ/mol). Where polymerization and depolymerization reactions are absent ΔHf is low and is due mostly to disordering during melting (e.g., ΔHf of cristobalite iŝ8.9 kJ/mol).Experimental evidence indicates that ferric iron is present as a negatively charged oxy-anionic complex in melts (e.g., [FeO2]1–) so that oxidation of Fe2+ should proceed according to: 4Femelt2+ + 1O2 + 6Omelt2−→4[FeO2]melt1−.Free oxygen (O2–), a by-product of polymerization reactions, drives the reaction to the right. Midocean ridge basalts (MORBs) consequently should be more oxidized than their source (e.g., lherzolites) or their residues (e.g., harzburgites). Extraction of melt from the upper mantle and deposition in the crust should produce a crust more oxidized than its upper mantle source. Production of O2– during melting and its presence in alkali-rich magmas also explains the alkali-ferric iron effect.
Formation of native arsenic in hydrothermal base metal deposits and related supergene U6+ enrichment: The Michael vein near Lahr, SW Germany
Authors: Scharrer Manuel , Sandritter Katharina , Walter Benjamin F. , Neumann Udo , Markl Gregor 
Published: January 2020

AbstractNative arsenic is an occasional ore mineral in some hydrothermal base metal deposits. Its rarity (compared to pyrite, arsenopyrite, galena, sphalerite, or chalcopyrite, for example) is surprising, as arsenic is a common constituent of upper crustal fluids. Hence, the conditions of formation must be quite special to precipitate native arsenic. An ideal location to investigate the formation of native As and to explore the parameters constraining its crystallization is the Michael vein near Lahr, Schwarzwald, southwest (SW) Germany. Here, galena, sphalerite, and native arsenic are the most abundant ore minerals. The two important ore stages comprise (1) galena-barite and (2) sphalerite-native arsenic-quartz, the latter with a general mineral succession of pyrite → sphalerite ± jordanite-gratonite solid solution → galena → native As. The native arsenic-bearing mineralization formed by cooling of an at least 130 °C hot saline fluid accompanied by a reduction due to the admixing of a sulfide-bearing fluid.Thermodynamic calculations reveal that for the formation of native arsenic, reduced conditions in combination with very low concentrations of the transition metals Fe, Co, and Ni, as well as low sulfide concentrations, are essential. “Typical” hydrothermal fluids do not fulfill these criteria, as they typically can contain significant amounts of Fe and sulfide. This results in the formation of arsenides, sulfarsenides, or As-bearing sulfides instead of native arsenic. Very minor amounts of pyrite, sulfarsenides, and arsenides record the very low concentrations of Fe, Co, and Ni present in the ore-forming fluid. High concentrations of aqueous Zn and Pb lead to early saturation of sphalerite and galena that promoted native arsenic precipitation by decreasing the availability of sulfide and hence suppressing realgar formation.Interestingly, native arsenic in the Michael vein acted as a trap for uranium during supergene weathering processes. Infiltrating oxidizing, U+VI-bearing fluids from the host lithologies reacted under ambient conditions with galena and native arsenic, forming a variety of U+VI (±Pb)-bearing arsenates such as hügelite, hallimondite, zeunerite, heinrichite, or novacekite together with U-free minerals like mimetite or anglesite. Some parts of the vein were enriched to U concentrations of up to 1 wt% by this supergene process. Reduced (hypogene) uranium phases like uraninite were never observed.
Evaluation of the Drug Utilization Pattern of Pre and Post Operative Medicines used in Surgical Department: A Prospective Observational Study
Authors: Sharma Shikha , Kumar Anoop 
Published: January 2020

Background:
Surgery is the art of treating lesions and malformations of the human body which involves various surgical techniques. Various classes of drugs are being used in the surgery but unfortunately, the drug utilization pattern of these drugs particularly in developing countries like India is still unsatisfactory. Thus, there is a need to conduct drug utilization studies of various medicines used in the surgical department.

Objective:
The main objective of the current study is to evaluate the drug utilization pattern of pre and post- operative medicines used in surgery to promote the rational use of medicines.

Material and Methods:
A prospective observational study was carried out over a period of 6 months (November 2017 to April 2018) from in Global Hospital, Jalandhar, Punjab, India. A consent form has been designed and filled by the patients after explaining the aims and objectives of the study. The case record form (CRF) has been designed to collect all the relevant information from the surgery patients.

Results:
A total of 271 cases have been reported and evaluated. 58.0% of patients were female and 42.0% of patients were male. The most common surgery was nailing, plating and knee replacement. In pre and post-operative procedures, the most common medicines prescribed were a combination of antimicrobials and antacids followed by anti-emetics, analgesics.

Conclusion:
The prescribed medicines were less from the National Essential Medical List (EML) which should be increase in future.
Investigation of Uplift Capacity of Deep Foundation in Various Geometry Conditions
Authors: Armaghani Danial Jahed , Sohaei Houman , Namazi Eshagh , Marto Aminaton 
Published: January 2020

Background:
Uplift resistance of deep foundations or piles is a critical factor for deep foundation design in several civil engineering applications such as electric transmission towers, communication towers and wind power generators. Therefore, the behavior of the pile under uplift load, together with its influential parameters, should be studied to provide a proper design.

Objective:
The aim of this study was to identify the effects of pile geometry, including diameter and embedment depth on the Maximum Uplift Resistance (MUR) of the small-scale piles.

Methods:
To achieve the aims of this study, a total of nine laboratory experiments having various pile diameters (i.e. 9 mm, 12 mm and 15 mm) and embedment depths (i.e., 10 cm, 15 cm and 20 cm) were planned, designed and conducted.

Results:
Generally, the results indicated that both diameter and embedment depth have a significant effect on the MUR of piles. The values of the MUR of piles were increased by increasing the pile diameters in all conducted tests. Furthermore, a significant increase in the MUR results was observed when the embedment depths are increased from 10 cm to 20 cm. Moreover, in all cases, small-scale piles were failed in embedment depths ranging from 5 mm to 10 mm.

Conclusion:
It was concluded that pile geometry has a deep impact on the MUR of the piles. Future research can be done to investigate the effects of other influential factors on the MUR.
Integrative management of infrastructure and traction equipment at the railway area
Authors: Sirina N. F. , Yushkova S. S. 
Published: January 2020

Railway transport is in condition of preparation for fulfillment of the forecast increase of transportation. The level of effectiveness and quality of the railways operation is assessed by the period of delivery to the point of destination of required volume of transported freight, which growth increases intensity of infrastructure wear and tear, which requires breaks in trains movement for providing “gaps” for the track repair operations and inevitably results in the delivery time increase.The use of the best speed path of trains is an important component of ensuring energy effectiveness. Transition to the ground process of trains’ movement control allows JSC “RZD” to arrange rhythmic movement of the car traffic movement providing “gaps” in the single opening for the entire ground.Conducted SWOT-analysis determined the risks and potential results of use of the single infrastructure of the railway area in terms of possible additional expenses in the future. Control mechanism of operation costs was proposed, which allows analyzing actual direct expenses and comparing deviations with regard to the set values. Overall algorithm of the model of integrative control of infrastructure and traction resources was formalized, which is illustrated by the example of participants of transportation process at the railway area. The basis of their interaction is the results of integral assessment that generalized various quantity of indicators and assessment factors of transportation process.Mathematical support of procedures of establishing the cost price is implemented in the Intellectual system of control and handling of the locomotive fleet at the area of the railway production infrastructure. Obtained results are integrated in the Automated control system of operation of the single center of infrastructure control and are set for transformation, effective use of the industrial companies potential.Key trends of the geo-economic condition having direct relation to the transportation and logistic operation in Russia determine necessity of effective management of traction resources by means of arrangement of the uniform process of transportation operation of JSC “RZD”, which results in the best use of transportation infrastructure, balanced increase of the volumes of loading and attraction of investments to the railways.
Clearance of obstructions of high passenger platforms
Authors: Lazarenko Yu. M. , Semerkhanov V. V. , Smirnov D. I. , Smelyanskiy I. V. 
Published: January 2020

The article examines the issues of justification of the norms of clearance of obstructions of high passenger platforms of the railways 1520 mm wide. The authors conducted analysis of the valid regulatory documents establishing the clearance requirements to passenger platforms and developed the double-criteria method of assessment of the relevance of these requirements. Examinations were conducted by the scientists of JSC “VNIIZhT” together with the experts of Moscow directorate of infrastructure in order to make correct selection of the clearance of obstructions when constructing new high passenger platforms. Experts of JSC “VNIIZhT” developed explanation of the relevance of the clearance norms stated in GOST 9238–2013 and in the Standard code in the Russian Federation approved by the order of the Ministry of Transportation dated 21.12.2010 no. 286, as well as performed inspection of compliance of high passenger platforms recently constructed or being constructed now with the requirements of these regulatory documents.Analysis of actual clearance to obstructions of the used platforms by means of the double-criteria method of justification of the clearance of high passenger platforms allowed assessing compliance of the actual clearance to obstructions of the platforms with the passenger comfort requirements, as well as with GOST 9238–2013. Examinations confirmed that actual clearance to obstructions with regard to the tolerances in general comply with the standard. Requirements of GOST 9238–2013, which shall be followed for selection of the clearance to obstructions of high passenger platforms, are the primary requirements of the valid regulatory documents specifying the norms of the platform clearance to obstructions.
Use of rating assessment of financial and economic operation effectiveness of the JSC “RZD” branches
Authors: Shanchenko P. A. , Vinnikova K. O. , Ershova E. V. , Lenskaya I. N. 
Published: January 2020

Rating is one of the methods of economic analysis used for comparative assessment of effectiveness of production and economic operation of the organizational structures in different branches of economy. Rating assessment of railways is used in JSC “RZD” since 2018 for objective assessment of economic and financial sustainability and effectiveness of management of structural divisions (branches). Methods of rating assessment adapted for structural divisions of JSC “RZD” with regard to the specificity of their operation are examined in the work.Main objectives of establishing the rating assessment system of financial and economic operation of the JSC “RZD” branches are examined, detailed rating classification is presented.Basic principles are developed for establishing the rating assessment system of operation effectiveness of the deputies of the JSC “RZD” branches heads in terms of financial and economic operation, as well as classification of indicators of financial and economic operation of the JSC “RZD” branches by types of operation with definition of their vector orientation.The following conclusions are made: 1. Presented rating assessment is an indicator of the quality of financial and economic operation management of the JSC “RZD” branches. 2. Use of rating assessment for results analysis is relevant for motivation of the management in charge for economic operations. 3. Further development of the rating assessment system consists in establishing the events classifier and optimization of the current expenses.
COMPUTER SIMULATION OF DETERMINING SILTATION VOLUMES OF WATER RESERVOIR STORAGE ON THE AKSAY RIVER
Authors: Magomedova M. R. , Kurbanova Z. A. , Shangereeva B. A. 
Published: January 2020

Objectives. The development of a mathematical model for the increased turbidity zones of the Aksay river in order to determine the siltation volumes of the Aksay water reservoir storage.Method. The mathematical model is developed using the theory of probability and the theory of random process outliers. The model takes the normal distribution of the horizontal and vertical components of the instantaneous flow velocities into account, as well as the Rayleigh law of the distribution of their maxima. The proposed model is used to calculate the “turbidity tail” of the Aksay river.Result. Due to the multifactorial nature of the continuously associated processes of siltation and deposition of suspended and bottom sediments in the upper pounds of the Aksay reservoir storage hydrological system, a mathematical model of the reservoir accretion process is developed. This model provides the reliability of accretion forecasting with spatial and temporal correlation with the siltation process model, which is actually feasible on the basis of computer simulation.Conclusion. The developed model, which is based on a probabilistic approach and the theory of random process outliers, reflects the overall process of sediment transport in open channels. The development and execution of simulation programmes is carried out using the Microsoft Developer Studio (MDS) and the Fortran Power Station algorithmic language, which comprises not only a programming system, but also a set of tools for supporting large software projects integrated into MDS.
PROCESSING IMAGES OF SALES RECEIPTS FOR ISOLATING AND RECOGNISING TEXT INFORMATION
Authors: Nazdryukhin A. S. , Khramtsov I. N. , Tushev A. N. 
Published: January 2020

Objectives. This article presents an application for the processing of scanned images of sales receipts for subsequent extraction of text information using the Tesseract OCR Engine. Such an application is useful for maintaining a family budget or for accounting in small companies. The main problem of receipt recognition is the low quality of ink and printing paper, which results in creasing and tears, as well as the rapid fading of printed characters.Methods. The study is based on a number of algorithms based on mathematical morphology methods for opening, closing and morphological gradient operations, as well as image conversion, which can significantly improve the final recognition of characters by Tesseract.Results. In order to solve this problem, a special image normalisation algorithm is proposed, which includes locating a receipt on an image, processing the received image section, removing image capture and carrier defects, as well as point processing for restoring missing characters. The developed application supports increased recognition accuracy of text information when using Tesseract OCR.Conclusion. The developed system recognises characters with fairly high accuracy, demonstrates a result that is better than that obtained when using the unmodified Tesseract method, but which is still inferior to the recognition accuracy of ABBY FineReader. Methods are also been proposed aimed at improving the developed algorithm.
CALCULATION AND DESIGN OF CELLULAR CARRYING LAYERS OF AIRFIELD RUNWAY PAVEMENTS
Authors: Murtazaliev G. M. , Batdalov M. M. , Akayev A. I. , Bulgakov A. I. , Payzulaev M. M. 
Published: January 2020

Objectives. The need to ensure the reliable functioning of expensive airfield structures poses great challenges for surveyors, designers, builders and operators of these structures. These tasks are complicated by the continuous development of aircraft, an increase in the intensity of their movement, an increase in mass, take-off and landing characteristics of aircraft and the degree of operational impact of aircraft on airfield structures. The aim of the study is the technological solution model proposed by the authors for the carrier layer of artificial runway pavement in the form of a honeycomb structure of closed steel sheets filled with concrete along with a method for assessing the strength and determining the rigidity of its aggregate.Method. A method is proposed for assessing the ultimate strength and determining the real stiffness parameters of structural layers of a runway with a constructive solution to the question of concrete work in cramped conditions (“cage effect”) from the impact of manifold repeated operational aircraft loads. This method is based on the fundamental principles of the deformation theory of reinforced concrete, developed by V.M. Bondarenko and elaborated in relation to the volumetric stress state of reinforced concrete structures in the works by G.A. Geniev, K.L. Surov and V.I. Rimshin.Result. An analytical dependency is obtained for establishing a discrete value, a generalised (integral) parameter of the material deformation of the carrier layer, i.e. the equation of the mechanical state of steel-reinforced concrete in a complex stress state, as well as the repeated application of an operational aircraft load at an arbitrary stress point of the artificial runway pavement taking into account the influence of changes in strength, reinforcement, temperature, humidity and rheological factors.Conclusion. The introduction of new technological principles for reinforcing and concrete laying into the design solutions of the bearing layers of artificial runway pavement allows their bearing capacity and rigidity to be significantly increased due to the redistribution of impact energy and the efficient use of the properties of structural materials during loading.