bluuebunny/crossref_metadata_2025 huggingface dataset:
Identification of cost factors relating to mining incidents
Authors: Preis E.P. , Webber-Youngman R.C.W.
Published: March 2021

The real cost of any mining incident has, empirically, proven to be estimation-driven, rather than fact-driven. One of the main reasons for this lies with the complexity of the cost composition of any given mining incident. Incident costs comprise both direct and indirect cost factors, and in many cases the costs associated with these factors are incurred during different time periods following the incident. In this paper we aim to identify the various cost factors arising from mining incidents, provide a thorough understanding of all the potential cost factors identified, and draw general conclusions on the knowledge obtained. Furthermore, recommendations are made on how mining companies could use the results, in order to assist them in calculating the costs of mining incidents. The paper also provides suggestions for further research, with the emphasis on the most significant immeasurable cost factors, namely the costs of implementing job accommodations following an incident, the harm to company reputation, and the decreased productivity due to low worker morale/psychological factors following an incident. If mining companies are aware of and understand which factors could contribute to the cost of any given incident, future planning and incident cost estimations could be easier. It should, however, be noted that although this study provides a comprehensive list of cost factors (and detailed explanations), other unknown cost factors relating to mine incidents could prevail in extreme cases.
Effect of mechanical activation of WC-based powder on the properties of sintered alloys
Authors:   Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, Abdulmenova Ekaterina , Kulkov Sergey ,   Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk,   National Research Tomsk State University, Russian Federation
Published: March 2021

Introduction. For the manufacture of wearproof tools and machine elements, the method of powder metallurgy is widely used. The preliminary high-intensity mechanical activation of the powder is used to improve the structure and properties of the alloy obtained by the method of powder metallurgy. The mechanical activation can result in formation of nanostructures with subsequent amorphization of the material, can bring phase transformations, it can certainly affect the properties of the material. However, mechanical treatment does not always lead to a positive result. Therefore, the study of the effect of mechanical activation of WC-based powder on the properties of sintered alloys is important. Purpose of the work: to study the effect of high-intensity mechanical activation of WC-based powder on the structure and properties of sintered samples. The work investigates alloys obtained by the method of powder metallurgy, using mechanically activated powders for 10 to 300 seconds in a planetary ball mill. Materials and methods. The alloys are obtained by cold one-sided pressing followed by sintering at a temperature of 1400 °C in a vacuum furnace. Particle morphology of powder and structure of alloys is analyzed by scanning electron microscopy method. The metallographic analysis of the alloys is carried out by optical microscopy. Phase analysis and the parameters of the crystal structure are performed by X-ray diffraction. The hardness of the sintered samples is measured by hardness tester. Results and its discussion. It is shown that after sintering of powders alloys with WC and Co phases are formed. The lattice parameter of the WC-phase correlates well with values in literature. A second carbide phase, Co3W3C, is formed in the samples upon mechanical activation for more than 100 sec. The minimum porosity of sintered sample is 7.8 ± 1 % that corresponds of sample with preliminary mechanical treatment for 30 seconds. It is shown that the hardness depends on grain size, porosity and second carbide content. Thus, mechanical activation can be effective for increasing the physical and mechanical properties and inhibiting grain growth, but in this case, it is necessary to carry out mechanical processing in the mechanical treatment time range 60-100 sec.
Invariant stress state parameters for forging upsetting of magnesium in the shell
Authors:   Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russian Federation, Loginov Yuriy ,   M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Zamaraeva Yuliya ,   Ural Federal University named after the first President of Russia B.N. Yeltsin, Ekaterinburg, Russian Federation,   M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg
Published: March 2021

Introduction. For pressure treatment of low-plastic metals, it is necessary to develop special techniques for increasing plasticity. In the cold state, an increase in plastic properties is possible due to an increase in the level of compressive stresses during deformation. In the processes of forging precipitation, this is achieved by using shells or clips of various types. At the same time, the configuration of the precipitation tool also matters. To create additional compressive stresses and increase the ductility of the metal, the working surface of the tool can be configured differently than with a normal free draft, where it is obviously larger than the contact surface area of the workpiece, so that metal broadening can occur. The stress state has a great influence on the plasticity of the processed material. This state is described by methods of tensor representation, but to assess the situation, it is customary to use invariants of tensors in one form or another, which eliminates the influence of coordinates on the results of the analysis. In the sections of deformable body mechanics dealing with the influence of the stress state on plasticity, the first, but sometimes other invariants of the stress tensor are used, the invariants themselves are transformed into the stress state indicator and the lode coefficient. The aim of the work: mathematical evaluation of invariant parameters of the stress state of the magnesium precipitation process at room temperature, according to the results of which it is possible to obtain a positive result in real experiments. Research methods: finite element simulation using the DEFORM software module. Results and discussion. The theoretical justification of increasing the plasticity of the magnesium billet in the process of precipitation in the cage without its compression is carried out. An increase in the stress state index modulo 2...5 times is revealed, which contributes to an increase in the plasticity of the metal. At the same time, a zone with a lode coefficient close to zero is identified. It is adjacent to the middle of the height of the workpiece at the point of contact with the cage and can be a dangerous cross-section from the position of crack formation.
Вариация стока и его факторов
Authors: Чеботарев Н. П.
Published: March 2021

Редакция журнала «Вестник ВГУ. Серия: География. Геоэкология» публикует монографию Н. П. Чеботарева «Вариация стока и его факторов». Проблема, поднятая автором в середине XX века, актуальна и сегодня. Однако монография Н. П. Чеботарева стала библиографической редкостью уже сразу после выхода в свет. Текст книги воспроизводится в авторском варианте. Для понимания важности проблемы в современных исследованиях в области гидрологии публикацию книги предваряет комментарий кандидата географических наук С. Д. Дегтярева (Вестник ВГУ. Серия: География. Геоэкология No 3 / 2018 г.).
HTAPP_Multiplexed Ion Beam Imaging (MIBI) antibody panel v1
Authors: Jiang Sizun , Rovira-Clave Xavier , Schuerch Christian , Nolan Garry
Published: March 2021

This document includes information on the MIBI antibody panel used to profile metastatic breast cancer, primary breast cancer and neuroblastoma samples for the Human Atlas Pilot Project (HTAPP). The goal of this panel is mainly focused on studies into the immune response to diseases, such as cancer, and to be able to both phenotype and assign functional readouts to major immune cell types.
A cross sectional study of in-hospital cases of Pediatric Tuberculosis detected by CBNAAT at a tertiary care teaching hospital of Central India.
Authors:   Demonstrator, Department of Physiology, G.R. Medical College Gwalior (M.P.), India, Singh Dr. Munindra Pratap , Sharma Dr. Pawan Kumar ,   Associate Professor (Designated), Govt. Medical College, Datia (M.P.), India, Upadhyay Dr. Pradeep ,   Child Specialist, Govt. Medical College Associated District Hospital Datia (M.P.), India, Agrawal Dr. Puneet ,   Senior Resident, Department of Pediatrics, Govt. Medical College, Datia (M.P.), India, Gupta Dr. Dinesh Kumar ,   Child Specialist, Govt. Medical College associated District Hospital Datia (M.P.), India, Verma Dr. Vishal ,   District Tuberculosis Officer, Datia (M.P.), India, Mehta Dr. Abhishek ,   Associate Professor, Department of Microbiology, Govt. Medical College, Datia (M.P.), India, Gupta Dr. Rajesh ,   Professor, Department of Pediatrics, Govt. Medical College, Datia (M.P.), India
Published: March 2021

Background: Childhood tuberculosis is difficult in the identification of the organism due to impropersampling as well as low sensitivity of the smear. Newer diagnostic methods like Cartridge basednucleic acid amplification tests (CBNAAT) can rapidly identify Mycobacterium tuberculosis withimproved sensitivity over the smear testing. Material & Method:This observational record basedcross-sectional study was undertaken to identify the epidemiology of tubercular infection in childrendiagnosed with CBNAAT. The study was carried out by analyzing the data of children from six monthsto 18 years who were diagnosed with Tuberculosis and treated with anti-tuberculosis therapy (ATT)from April 2018 to March 2020. Results: Data of a total of 166 patients was analyzed. 42% ofoverall collected samples were reactive to CBNAAT testing for tuberculosis. 40 gastric aspiratesamples were collected and only four (10%) turned reactive for tuberculosis by CBNAAT. None of thepediatric samples was positive for MDR TB. 66% of children completed treatment and 33% weredeclared cured. Conclusion: 42% positivity after CBNAAT testing for tuberculosis infection incollected samples of sputum and gastric aspirate where only 10% yield in GA samples.
Load Flow and Transient Stability Analyses for an Integrated Solar Combined Cycle Station in Iraqi Southern by Using ETAP
Authors: Abass Ahmed Z. , Pavlyuchenko Dmitry A. , Prokopov Alexandr V. , Hussain Zozan Saadallah
Published: March 2021

Analyses of a power system are important for designing and operating phase execution monitoring and to ensure reliable grid operations by sufficient protection projects settings. In this paper, electrical model of a 340 MW integrated solar combined cycle (ISCC) located in the south of Iraq, is developed by Electrical Transient Analyzer Program (ETAP) and load flow, voltage stability and short circuit analyses are performed. Impact of power grid voltage instability on system buses of the power plant is estimated. Using load flow analysis that use Newton-Raphson algorithm, buses operating at under voltage due to power grid voltage instability are specified and their voltages are improved according to given voltage limitation that are based on buses criticality with regard to loads. On-load tap changers and reactive power compensation are used to improve steady state voltage stability. Optimal position for capacitor banks placement and number of capacitor banks are proposed by using optimal capacitor placement module of ETAP. The use of modern technology and advance planning have a big impact on reducing losses. The article shows that the lack of planning is one of the main causes of energy losses. The parameters of the module also indicate the voltage limits, bus voltage and ratings of available capacitor banks. The voltage limit is set at 95% ≤ V ≤ 110%, and it is global for all buses
A Model of Reliability Optimization of a Stand-Alone Electric Power System with Constraints on Dynamic Stability of the Wind Turbine
Authors: Perzhabinsky Sergej M. , Karamov Dmitriy N. , Achitaev Andrei A.
Published: March 2021

The relevance of the study is due to the development herein of a model for reliability optimization of stand-alone power systems with wind turbines and electrochemical power storage devices, with special emphasis within this model put on the specifics of power equipment operation. The key feature of the model developed is that it enables us to factor in the requirements to be met by the equipment as arising from the considerations of dynamic stability of the stand-alone system. When simulating battery storage operating modes, the charge-discharge limits as well as the remaining charge in the storage are taken into account. Thus, the reduction of the total number of considered mixes of the equipment being commissioned is achieved, the computational efficiency of the reliability optimization method is increased, while the validity of modeling results is improved. Development of methods for optimization of reliability of stand-alone electric power systems with wind turbine installations and electrochemical power storage devices while meeting requirements for electrodynamic stability. A stand-alone power system that is assumed to be located in the coastal area of Lake Baikal in the Kabansky State Nature Reserve, Republic of Buryatia, Russia, serves as the object of the study. Calculations are based on multiple simulation of modes of operation of the electric power system by means of the Monte Carlo method. The values of random variables are modeled as per specified laws of distribution and fault rate indicators of power equipment. Modeling of power generation at wind turbines is based on a detailed analysis of real-life weather data (average hourly wind speed, air density and humidity). The method of reliability optimization of stand-alone power systems with wind turbines and electrochemical energy storage devices was developed so as to take into account the requirements to be met by electric power equipment in terms of dynamic stability. The optimization criterion is the minimum expected value of the cost of produced electricity. Power redundanct and energy storage devices are used as means of reliability assurance. The results of calculations attest to the fact that for the natural and climatic zone under consideration, the use of vertical axis wind turbines in a stand-alone power system proves more efficient than the use of horizontal axis wind turbines
The idea of progress in the experience of academic philosophy in Ukraine the second half of the 19th and early 20th centuries
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Napadysta V. G.
Published: March 2021

The article analyzes the views of representatives of academic philosophy in Ukraine in the second half of the 19th and early 20th centuries on progress, its components, sources, driving forces and practical consequences of its implementation. It is determined that the topic of progress belonged to the topical issues of academic philosophizing in Ukraine of this period. Among the personalities interested in the idea of progress, the thoughts of S. S. Hohotskyi, M. Ya. Hrot, M. O. Olesnytskyi and H. I. Chelpanov attract attention. The most detailed idea of progress is presented in the creative work of the theologian-moralist M. O. Olesnytskyi, who saw in progress the unity of scientific, technical and moral progress. The signs of progress, in his opinion, were the growing power of the human spirit over nature, the strengthening of integration processes of spiritual orientation in relations between peoples and nations on the basis of the growing importance of the individual. For the views of academic philosophers in Ukraine in the second half of the 19th – early 20th century on the problems of historical progress, differing in the scope of detailed analysis of the diversity of the idea of progress, there is a common motive, which with certain interpretations is that the progressive development of humanity can be considered only in the unity of material, economic, scientific and technological development, moral improvement of personality, which is the dominant, leading force in this process. In academic philosophy in Ukraine in the second half of the 19th and early 20th centuries we do not find the dominance of an unambiguous understanding of the theory of progress as mainly material and technical, social improvement, based on quantitative arguments. In general, opinions were articulated on the interdependence of material, technical and spiritual components in the process of progress, the main purpose of which was determined by the moral improvement of man.
Muralart as a component of the cultural space of the city
Authors:   Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, Batenko A. O.
Published: March 2021

The aim of the article is to define the role of mural art as a part of street art in the context of the cultural urban space. Identification of mural art in cities, its transformation depending on the place of creation and changes in the perception of the viewer requires needs research that is more detailed. А lot of people do not distinguish between concepts in street art; do not understand the artistic value of murals. Therefore, it is useful to show all functions, which murals can have. The quantity and quality of murals in the urban space affects its reputation, culture, development trends. That is, murals can both spoil urban visions and aestheticize them. Murals often engine enrichment of human consciousness, because artists raise important social issues, motivate the viewer to think. They try to turn the city into a large gallery, to influence people who involuntarily become spectators and connoisseurs of street art. It is also appropriate to explore the trends of Ukrainian muralism in the urban space. After all, street art has become very popular in Ukraine, as evidenced we can see various thematic festivals and competitions. The research methodology involves an interdisciplinary approach, analysis of scientific works of cultural and art history, review of thematic media and creative work of street artists to determine the characteristics and purposes of their activities. The works of modern Ukrainian researchers who study the issues of the cultural space of the city, mural art and street art in general are involved. The scientific novelty lies in the study of the influence of mural art on personal perception on drawing attention to socio-political problems in the urban context. On the example of the analysis of works of world street artists the tendency to social and educational function of murals, instead of simply aesthetic, is traced. The practical significance of the study is to emphasize that murals have artistic value, a unique semantic message, and are not just a means of aestheticization. The article can be useful for specialists in culturology, history, art history, architecture and for artists.
TÜRKİYE’DEKİ BÖLGESEL KALKINMA AJANSLARINA ALTERNATİF BİR MODEL: ÇOKLU TİP İL KALKINMA AJANSLARI
Authors: Arslan Ömer
Published: March 2021

Türkiye'de bölgesel kalkınma ajansları, AB'nin bölgesel politikasına uyum sağlanabilmesini temin maksadıyla AB kurumlarının tavsiyesi üzerine AB ile tam üyelik müzakereleri sürecinde kurulmuştur. Bu bölgesel kalkınma ajansları ülkedeki bölgesel eşitsizlikleri yerelde ve yerinde azaltarak ülkenin tümünün mümkün olduğunca homojen bir şekilde kalkınabilmesi için yeterli bir kapasitenin geliştirilebilmesine katkı sağlama amacıyla oluşturulmuştur. Bu kalkınma ajansları toplamda 26 olup, 23 kalkınma ajansı birden fazla ili kapsarken, sadece İstanbul, Ankara ve İzmir illeri bir ajans tarafından temsil edilmektedir. Tek tip yönetişim modeliyle kurulan bu ajanslar 10 yılı aşkın bir süredir faaliyetlerini sürdürmektedirler. Ancak ülke genelinde tek tip örgütlenen bu yapıların her bölgenin farklı dinamiklerini harekete geçirerek bölgesel eşitsizliğin giderilmesinde hedeflenen başarıyı tam olarak yerine getiremeyeceği görülmeye başlanılmıştır. Bu çalışmada bu yetersizliğin olası nedenleri ve bu ajansların yönetişim yaklaşımına uygunluğu irdelenmiştir. Bunun yanında daha dar bir alanı kapsayan il ölçeğinde çoklu tip kalkınma ajansları modeli bir öneri olarak ifade edilmiş ve değerlendirilmiştir. Bu kapsamda her kente özgü bu ajans kurgusunun yereldeki ekonomik dinamikleri harekete geçirerek yerinde kalkınmayı sağlamada daha iyi model olabileceği üzerine durulmuştur.
Machine learning-aided identification of train weights from railway sleeper vibration
Authors: Kaewunruen S , Sresakoolchai J , Thamba A
Published: March 2021

Within the UK and many other countries, the weight of a train is a critical factor in determining how much the train operator must pay to use the railway network. This study explores the use of different machine learning algorithms to predict the weight of a train based on the vibration
signals recorded in a railway sleeper. The vibration signals are split into two groups: time-domain and frequency-domain signals. Then, different algorithms are developed for each group, to see which domain offers the best representation of a vibration signal for use within models to determine
target values. From the study, it can be seen that machine learning has the potential to predict the weight of a train effectively. This insight can lead to the use of mobile sensors in practice, such as the application of wireless accelerometers connected with a smartphone, to help engineers
audit and provide assurance of the train access integrity.
NOANET: A Continuously Operating GNSS Network for Solid-Earth Sciences in Greece
Authors: Chousianitis Konstantinos , Papanikolaou Xanthos , Drakatos George , Tselentis G.-Akis
Published: March 2021

The NOANET network is a continuously operating high-rate Global Navigation Satellite System (GNSS) network in Greece whose primary role is to enhance and support geophysical research employing GNSS data. This network is operated by the Institute of Geodynamics of the National Observatory of Athens and currently (September 2020) consists of 26 stations, most of which are located close to major seismogenic structures of Greece to optimally measure tectonic and seismically induced motions. All NOANET receivers are configured to record and collect data with a sampling rate of 1 Hz, although some of them also collect data every 5 Hz on their ring buffer. The network is committed to free and open data sharing within the scientific community, and the collected data are made available via the NOANET data repository and distribution point for all interested parties with no limitations. Integrity, validity, and quality checks of the acquired data are performed using a variety of software tools along with in-house developed programs to supervise the network performance and detect ill-formed data and/or awkward station behavior. In addition, the conventional low-rate GNSS observation data of all NOANET stations are routinely processed on a daily basis to supervise their performance through their position time series. Since the beginning of its establishment, the NOANET network has recorded a variety of deformation signals, and a large number of published papers have used GNSS data from stations that are part of NOANET to constrain, model, and interpret the nature of the associated geophysical phenomena.
The role of mathematics in transdisciplinarity content of modern education
Authors: Testov V. A. , Perminov E. A.
Published: March 2021

Introduction. In the context of modernisation in modern education, a deeper (by contrast to interdisciplinary) transdisciplinary level of cognition is becoming prevalent. Transdisciplinary level generates a universal methodology capable of addressing the complex multi-factorial interdisciplinary problems of nature and society. The result is transdisciplinary branches of science such as cybernetics, disaster theory, synergetics, artificial intelligence, big data, etc. All these concepts have been developed on the basis of the achievements of mathematics over the past 70-80 years, the era of mathematical sciences. As a consequence, mathematics has become the basis of the language of information technologies and processes, and, thereby, this science has given rise to a global digital transformation of society based on the use of the unique computer capabilities.The aim of the present research was to explore the role of mathematics in the transdisciplinary trend in updating the content of education with a view to bringing education to a higher (by contrast to interdisciplinary) level, based on the inclusion of modern mathematical theories and methods in the content of education and their applications depending on the direction and profile of the student training.Methodology and research methods. In the course of research, the systemic, cultural, and meta-subject approaches were employed to analyse the role of mathematics in education and to solve the transdisciplinary problems of education content modernisation (based on the most striking manifestations of modern mathematical culture). As a result of the synthesis of these approaches, a holistic scientific worldview emerges, which not only goes beyond the traditional disciplines and methods, but also appears above them.Results and scientific novelty. The analysis of transdisciplinary trend in postindustrial education was carried out. Mathematical and pedagogical aspects of the implementation of systemic, cultural and meta-subject approaches were investigated in order to achieve a higher level of educational process. At the same time, the authors justified the use of mathematical modelling, discrete mathematics, computational processes and artificial intelligence in the training, i.e. formation of a new superdisciplinary way of thinking in students, acquisition of a general cultural cognitive strategy to perform professional and transprofessional tasks.Practical importance. The findings of the current publication contribute to the realisation of the transdisciplinary trend in the content of student training, and will be of interest to both educational theorists and teachers, who train students in many fields. Moreover, this work will be useful for all those interested in the future advancement of the system of education.
Pollen Ultra-Morphology and Pollen Viability Test of Lilium Oriental Hybrids
Authors: Du Xiaohua
Published: March 2021

Ultra-morphology and pollen viability assessment are essential to understand evolutionary ecology and sterility problem, and to design hybridization program in cross-breeding. The pollen ultra-morphology of two Lilium Oriental hybrid cultivars, „Sorbonne‟ and „Siberia‟ were observed using scanning electron microscope. And the pollen germination condition in vitro and four dye tests methods for pollen viability were determined. The results showed that pollens of two Lilium Oriental hybrid cultivars were much alike in ultra-morphology with ellipsoidal shape, reticulate surface decoration and single germination ditch, indicating a close genetic relationship between two cultivars. The suitable medium for pollen germination of two cultivars composed of 10% sucrose, 0.1% boric acid and 0.5% agar. The pollen germination percent reached the highest at 25oC. Although I2-KI stain, TTC stain and peroxidase precipitation methods were not suitable for lily pollen viability test, the pollen viability tested by acetocarmine method were close to that by in vitro pollen germination at suitable condition, which suggested acetocarmine stain can be as a quick test method for pollen viability of Lilium Oriental hybrids. © 2018 Friends Science Publishers
Efficient Rank-Based Analysis of Multilevel Models for the Family of Skew-t Errors
Authors: Saleem Sehar , Sherwani Rehan Ahmad Khan
Published: March 2021

Rank-based analysis of linear models is based on selecting an appropriate score function. The information about the shape of the underlying distribution is necessary for the optimal selection; leading towards asymptotically efficient analysis. In this study, we analyzed the multilevel model with cluster-correlated error terms following a family of skew-t distribution with the rank-based approach based on score function derived for the class of skew-normal distribution. The rank fit is compared with the Restricted Maximum Likelihood (REML) estimation in terms of validity and efficiency for different sample sizes. A Monte Carlo simulation study is carried out over skewed-t and contaminated-t distribution with a range of skewness parameter from moderately to highly skewed. The standard error of regression coefficients is significantly reduced in the rank-based approach and further reduces for a large sample size. Rank-based fit appeared asymptotically efficient than REML for each shape parameter of skewness in skew-t and contaminated-t distribution computed through a calculation of precision. The empirical validity of fixed effects is obtained up to the nominal level 0.95 in REML but not rank-based with skew-normal score function.
The Efficiency Comparison and Application of Proposed Rhombus Ranked Set Sampling
Authors: Choudri Mishal , Saeed Nadia , Saleem Kanwal
Published: March 2021

A new scheme ‘Rhombus Ranked Set Sampling’ (RRSS) is developed in this research together with its properties for estimating the population means. Mathematical validation along with the simulation evaluation is presented. The proposed method is an addition to the family of different sampling methods and generalization of ‘Folded Ranked Set Sampling’ (FRSS). For the simulation process, nine probability distributions are considered for the efficiency comparison of proposed scheme from which four are symmetric and rest are asymmetric among which Weibull and beta distributions which are used twice, unlike parametric values. (Al-Naseer, 2007 and Bani-Mustafa, 2011). Through simulation processes, it is observed that RRSS is competent and more reliable relative to simple random sampling (SRS), ranked set sampling (RSS) and folded ranked set sampling (FRSS). It is noted that for all the underlying distributions, an increase in the efficiency of Rhombus Ranked Set Sampling (RRSS) is achieved via increasing the size of the sample ‘p’. Besides the efficiency comparison, consistency of the proposed method is also valued by using Co-efficient of Variation (CV).  Secondary data on zinc (Zn) concentration and lead (Pb) contamination in different parts and tissues of freshwater fish was collected to illustrate the evaluation of RRSS against SRS, RSS, FRSS and ERSS (extreme ranked set sampling). The results obtained through real life illustration defend the simulation study and hence indicates that the RRSS estimator is efficient substitute for existing methods (Al-Omari, 2011).
Pediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 in Indian children: Pune experience
Authors: Sarangi Bhakti , Walimbe Ajay , Shankar Guruprasad Hassan , Oswal Jitendra S. , Reddy K. V. Sandeep , Prithvichandra K. C.
Published: March 2021

Background: Aim was to study the clinical profile, laboratory parameters and outcome of children with pediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2 (PIMS-TS).Methods: This is an observational study done in a PICU of a tertiary care teaching hospital in Pune conducted over seven months starting from 1st June to 31st December, 2020 and which included the children meeting the case definition of PIMS-TS.Results: A total 25 children were included of which 13 (52%) were males. Median age was 7 years. Fever of short duration was present in all children and 23 (92%) had gastrointestinal symptoms. 21 (84%) had features of shock while myocardial dysfunction was seen in eight (32%) children. Kawasaki disease like features were present in seven (28%) while five (20%) showed coronary artery dilatation. All had neutrophilia and lymphopenia while 10 (40%) showed thrombocytopenia. Interleukin-6 levels, done in six, and were found to be raised in all. SARS-CoV-2 RT-PCR and IgG antibody were positive in two while only IgG was positive in 14 (56%) children. Seven required mechanical ventilation while eleven were managed with HFNO. 16 (64%) children received both IVIG and steroids, two (8%) children received only IVIG while seven (28%) received only steroids. Two children each additionally received Tocilizumab and infliximab. 24 (96%) children survived.Conclusions: Fever, gastrointestinal symptoms and hypotensive shock were predominant features of PIMS-TS. 2/3rd of children had demonstrable SARS-CoV-2 antibodies. Cardiac dysfunction was seen in 1/3rd of the children. It is a life-threatening illness requiring critical interventions, multi-organ support and various immunomodulators.
A capital paulista, suas águas e seu espaço (1890-1940): diferentes ações, um sentido.
Authors: Dos Santos Fabio Alexandre
Published: March 2021

Pode-se afirmar que se formou na cidade de São Paulo um “sentido de atuação” urbana constituído por uma orientação privada nas primeiras décadas do século xx? Essa é a hipótese desta reflexão que busca interpretar intervenções públicas e privadas sobre a cidade tendo como eixo norteador as águas, em especial as utilizadas para geração de energia. Isto posto, o objetivo que fundamenta este artigo é apreender a relação e os legados de empresas e agentes públicos na construção desse possível sentido de ocupação urbana que gerou um caráter elitista, excludente e privatista do espaço público. Para isso, são analisados documentos públicos e privados, jornais, além de um balanço historiográfico sobre os temas tratados.
12 ejercicios de mecánica de suelos
Authors: Navarro Gámir Vicente , De la Morena Borja Gema , Asensio Sánchez Laura , Yustres Real Ángel
Published: March 2021

Los ejercicios incluidos en este Cuaderno pretenden “movilizar” los contenidos que los autores consideran básicos para el aprendizaje de la Mecánica de Suelos y la Geotecnia. Sin embargo, no es un cuaderno de iniciación. La resolución de los ejercicios se plantea asumiendo que el lector está familiarizado con la materia. El objetivo del Cuaderno, como indica su título, es “contrastar” que esto es realmente así. No obstante, como cualquier “test de contraste”, el resultado sólo puede ser negativo. Seguir todos los ejercicios no es sinónimo de tener un completo dominio de la materia. Solo supone que no se tienen fundamentos racionales para asumir lo opuesto (desconocimiento de los fundamentos de esta área de conocimiento). Por el contrario, los resultados negativos sí son un indicativo claro: si el lector no es capaz de seguir algún ejercicio, debería plantearse la conveniencia de realizar un esfuerzo para afianzar la materia asociada al ejercicio en cuestión.
Internet charity in Russia: conditions, forms and practices
Authors: Krainova Natalia V. , Agurova Arina A.
Published: March 2021

The article is devoted to the analysis of such a phenomenon in modern realities as Internet charity. The authors analyzed the forms of modern charity and its tools in the online reality, as well as considered specific campaigns using digital mechanisms. Charity is considered as a public detail, carried out exclusively on a voluntary basis. The main features are highlighted: the gratuitous basis; the choice of the place, volume and format of assistance; the social orientation of the activity, the subject of which can be either a private person or a legal entity; the non-state nature of the activity with possible state support for campaigns and NGOs. In modern Russian society, charity is not a national tradition. However, today there are a large number of charitable foundations, non-profit organizations, as well as private initiatives on the part of citizens. The virtualization process makes it possible to introduce modern tools and mechanisms into the usual spheres of life, thanks to which most of the processes are simplified and become accessible to a larger number of citizens. The sphere of charity is also no exception. The development of ICT makes it possible to spread information to a larger audience, to mobilize a larger number of stakeholders, and to optimize the donation process. The article deals with cases of charitable activity in the Internet environment, innovative forms of charity, as well as what functions are performed by modern tools of the studied activity. We can say that the Internet charity today acts as a significant and effective resource due to the availability, efficiency, visibility, and scale of the dissemination of socially oriented information.
The Tempest and The Merchant of Venice at the Shakespeare Company, Calgary
Authors: Werier Clifford
Published: March 2021

Production notice for the 2019 Shakespeare Company productions of The Tempest and The Merchant of Venice in Calgary. Described by Cliff Werier.
Ocular Manifestations in Neurocutaneous Syndromes with Emphasis on Neurofibromatosis – A Descriptive Observational Study
Authors: Sudha Sija , Gopalan Deepa Molathe
Published: March 2021

BACKGROUND Neurocutaneous syndromes (NCS) are a group of genetic disorders that produce a variety of developmental abnormalities of the eye. Ophthalmic manifestations usually appear early in life and progress with time. The study was conducted to know the prevalence of ocular manifestations in neurocutaneous syndromes with emphasis on neurofibromatosis. METHODS This study was conducted in ophthalmology department at a tertiary care hospital during a period of 2 years among 30 patients. All phakomatoses referred from other specialty departments for ophthalmological evaluation and cases diagnosed in ophthalmology department during routine evaluation were included in the study. RESULTS Neurofibromatosis type 1 (NF-1) accounted for most of (66.67 %) the cases followed by Sturge Weber syndrome (SWS) (20 %). Majority (55 %) of NF-1 and 83.33 % of SWS and all patients of other phakomatoses were in the age group < 30 yrs. 55 % of NF-1 patients were males. 65 % of NF-1 patients gave positive family history. Lisch nodules, the most common ocular finding in NF-1 were present in 85 % of patients and of these 82 % were bilateral. Medullated nerve fibre was seen in 10 % of patients. Glaucoma was seen in 66.67 % of Sturge Weber syndrome patients. Conjunctional telangiectasia was seen in 16.67 % of Sturge Weber syndrome patients. Seizures and radiological features were seen in most patients with Sturge Weber syndrome. Megalocornea with normal intraocular pressure (IOP) was seen in both of our patients with posterior fossa malformations, haemangioma, arterial anomalies, coarctation of the aorta/cardiac defects, and eye abnormalities (PHACES syndrome). Eyelid coloboma, ectropion uvea, hyperchromia iridis & myopia was seen in one patient with PHACES syndrome. A case of tuberous sclerosis had many systemic features like calcified subependymal nodules, renal angiomyolipomas, skin features and the only ocular finding was hypopigmented iris spots. CONCLUSIONS Ophthalmologist has a role in early recognition of the neurocutaneous syndrome from specific ocular features (like Lisch nodule in NF-1), reducing ocular morbidity by timely treatment (of conditions like glaucoma) and prompt referral to concerned speciality for management of systemic involvement. KEYWORDS Neurofibromatosis, Sturge Weber Syndrome, Tuberous Sclerosis
Pattern of Skin Diseases among Migrant Construction Workers - A Community Based Cross-Sectional Study from Andhra Pradesh, India
Authors: Kilaru Krishna Rajesh , Munnangi Pooja , V Uma Devi , Kilaru Manogna Chowdary
Published: March 2021

BACKGROUND Workers in a construction site may be exposed to various hazardous substances, physical agents, poor hygienic living conditions and harsh environmental factors. It is associated with plethora of health risks and increased risk of various dermatological conditions is one such phenomenon which needs evaluation. We did this study to assess the prevalence and pattern of skin diseases among migrant construction workers. METHODS The current study was a community based cross-sectional study. Group of construction workers working in a single cluster were selected by convenient sampling. Data collection was done from March to September 2019. All the migrant construction workers, who were available onsite were screened by a team of qualified dermatologists and diagnosis of skin diseases was made using clinical skills and lab facilities. Descriptive analysis was carried out by mean and standard deviation (SD) for quantitative variables, and frequency and proportion for categorical variables. Data was analysed using IBM SPSS statistical software version 21. RESULTS A total of 833 construction workers were screened. There was a high male preponderance, with male to female ratio of 7.42:1. The overall prevalence of any dermatological morbidity was 36.2 %. Infective skin diseases contributed to 61.56 % of the dermatological morbidity. Among infective conditions, fungal infections (65.5 %) were the most common infective dermatoses. Mite infestation (scabies) was found in 46 (23.35 %) workers. The common bacterial infections observed were furuncle and folliculitis in 7 (3.55 %) subjects each. Sycosis barbae was seen in 2 (1.02 %) subjects. Viral infections like herpes and molluscum contagiosum have contributed to the minor portion of the dermatological morbidity. One subject was found to have Hansen’s disease. Allergic contact dermatitis (29.27 %), photodermatitis (14.63 %), miliaria (12.20 %), hand eczema (9.76 %) and irritant contact dermatitis (7.32 %) were the common non-infective skin conditions affecting the study population. CONCLUSIONS There is high burden of dermatological morbidity among construction workers. Majority of the skin conditions were infective in nature. Poor literacy levels, overcrowded living conditions and poor personal hygienic practices were the possible risk factors. KEYWORDS Dermatological Morbidities, Construction Workers, Prevalence
Sustainable Digital Preservation Initiatives Benefit from Multi-Pronged Approach
Authors: Patterson Jordan
Published: March 2021

A Review of:
Masenya, T. M., & Ngulube, P. (2020). Factors that influence digital preservation sustainability in academic libraries in South Africa. South African Journal of Libraries and Information Science, 86(1), 52–63. https://doi.org/10.7553/86-1-1860
Abstract
Objective – To define principles for the sustainable management and preservation of digital resources.
Design – Survey and literature review.
Setting – Academic libraries in South Africa.
Subjects – Twenty-two academic institutions in South Africa.
Methods – The researchers evaluated four conceptual models of digital preservation and conducted a literature review for the same subject. Informed by these reviews, the researchers developed a questionnaire for South African academic institutions, distributed the questionnaire, and studied the results using statistical analysis software.
Main Results – Twenty-two of twenty-seven (81.5%) surveys were returned. Results indicated a broad consensus about which factors were important in sustainable digital preservation; all factors listed received anywhere from 86.3% to 100% agreement among respondents.
Conclusion – A proposed conceptual integrated digital preservation model recommends a three-pronged approach to address management-related, resource-related, and technological-related factors in sustainable digital preservation.
The Relationship Between Adiponectin Serum Level and Coronary Artery Disease in Type 2 Diabetic Patients
Authors: Mazloum Khorasani Zahra , Choobkar Saeed , Khameneh Bagheri Ramin , AkbariRad Mina , Firoozi Abdollah
Published: March 2021

Adiponectin is an adipocytokine that has a higher serum level in healthy people. In type 2 diabetes, insulin resistance, hypertension, MI, and dyslipidemia, the serum level of adiponectin is lower than 4 µg/mL. Adiponectin is proved to have a protective role against atherosclerotic changes where its low serum levels in type 2 diabetes can lead to the progression of atherosclerotic lesions. In this study, we aimed to survey the possible effects of adiponectin in the development of coronary artery disease in type 2 diabetics. Thirty diabetic cases with coronary artery disease, 30 diabetic cases without known coronary artery disease, and a group of 30 healthy volunteers, all of them were between 18-65-year-old, were entered ourstudy. We gathered demographic data by performing a physical examination followed by filling a checklist and a set of laboratory tests. All the groups were sex and age-matched (P=0.284 and P=0.163 respectively). CAD group had the lowest HBA1C (P<0.001). Both LDL and HDL were also lower in the CAD group (P<0.001). Adiponectin was also lower in the CAD group when compared to other groups (P<0.008) or when compared with only normal diabetics (P<0.002). We found a correlation between adiponectin and HDL (r=0.348, P=0.008), suggesting each unit of reduction in serum level of adiponectin could increase the chance of coronary artery disease by 38% in diabetics. In this study, we showed that the lower serum level of adiponectin is correlated with an increased risk of coronary artery disease in type 2 diabetics.
The Effect of Trans-Abdominal Chorionic Villus Sampling on Fetal Heart Rate and Placental Vascular Resistance Index: A Color Doppler Ultrasound Study
Authors: Farshchian Nazanin , Naleini Farhad , Farshchian Negin , Bahrami Kamangar Parisa
Published: March 2021

Fetal hemodynamic changes can occur immediately following invasive chorionic villus sampling (CVS). We decided to study the possible effect of CVS on fetal heart rate (FHR), and uteroplacental resistance index (RI) changes using color Doppler ultrasound. Thirty-five pregnant patients with a gestational age of more than 12 weeks were included. Trans-abdominal CVS was done to assess the possibility of thalassemia. Before and after the CVS, color Doppler ultrasound was done to measure FHR and uteroplacental RI. Mean (SD) values for FHR before and after the CVS were 175.22 (±9) and 173.62 (±9.94) beats per minute, respectively; P=0.18. Mean (SD) uteroplacental RI before the CVS was 0.79 (0.07) which significantly increased to 0.82 (0.08); P=0.03. We observed a significant increase in resistance of blood flow in placental circulation after CVS. However, no significant change was observed regarding FHR after CVS.
Water pipe Smoking and Genital Wart: Call for Epidemiological Research
Authors: Zendehdel Kazem
Published: March 2021

The article's abstract is not available.
Prevalence of Substance Use among Psychotic Patients and Determining Its Strongest Predictor
Authors: Mousavi Seyedeh Bentolhoda , Higgs Peter , Piri Negar , Sadri Ensieh , Pourghasem Matina , Jafarzadeh Fakhari Sanaz , Noroozi Mehdi , Miladinia Mojtaba , Ahounbar Elaheh , Sharhani Asaad
Published: March 2021

Objective: Although comorbidity of psychotic disorders and substance use can lead to increase in mortality, less is known about the outbreak and predictors. Psychotic patients tend to be overlooked during assessment; hence, the possibility of an undertreated or missed condition such as increasing substance use. This investigation aimed to measure the prevalence of substance use in psychotic patients and to survey the powerful predictors.
Method: In a 1-year cross-sectional study, 311 psychotic patients were assessed using the Structured Interview Based on DSM-5 for diagnostic confirmation as well as questions surveying prevalence and possible predictors of substance use.
Results: Prevalence of substance use among psychotic patients was 37.9%. Several variables were identified as factors associated with drug abuse among the psychotic patients. These included male gender, younger age, being currently homeless, a history of imprisonment, and having family history of drug use. The strongest predictors of substance use, however, were family history of drug use, male gender, and being currently homelessness.
Conclusion: Policymakers should note the importance of substance use among psychotic patients. Developing active screening strategies and comprehensive preventive plans, especially in the high-risk population, is suggested.