bluuebunny/crossref_metadata_2025 huggingface dataset:
Blast Furnace Slag Disposal Problems in the Context of the Transition to a Circular Economy
Authors:   Institute of Industrial Economics of the NAS of Ukraine, Lepa V. , Prohnymak O. ,   Institute of Industrial Economics of the NAS of Ukraine
Published: June 2021

The problem of the accumulation of waste from the metallurgical industry in Ukraine, in particular, blast furnace slag, has an economic and environmental component. Therefore, the main problems, first of all, include the absence of a criterion for the greening of the industrial sector among the priorities of Ukraine's economic policy. The article examines the situation in the slag industry of Ukraine, summarizes the existing experience of using metallurgical slags as technogenic raw materials. The problems of introducing a circular economy in the territory of intensive development of the metallurgical industry are considered primarily in the context of creating a flexible infrastructure for processing metallurgical waste, because the problem of waste is at the center of attention of the entire circular economy. But such an infrastructure cannot be created without overcoming the technological, economic, and institutional problems of utilizing blast-furnace slags in Ukraine, which hinder the creation of a slag processing industry on the principles of a circular economy. Based on the assessment of macroeconomic and environmental effects from the introduction of elements of a circular economy in the domestic metallurgical industry, the resource value of blast furnace slags as a technogenic raw material for the construction industry, in particular the cement industry, as well as road construction and other areas of use, has been proved. The ways of solving the economic and institutional problems of slag processing at the macro-, meso- and microeconomic levels are given, proposals are made to improve the legal framework for the development of the circular economy, the participation of the state, local authorities and business in the creation of a domestic industry for the processing of blast-furnace slag.
Conceptual Basis of Implementation and Improvement of the Export Strategy of the Dnipropetrovsk Region
Authors:   Institute of Industrial Economics of the NAS of Ukraine, Osadcha N.
Published: June 2021

The article analyzes the tools of market diversification. The situation of development of export activity of Ukraine in the conditions of pandemic is investigated. The main threats to foreign economic activity have been identified. The necessity to create a mechanism for diversification of export potential of Dnipropetrovsk region in the conditions of economic and political crisis of Ukraine is substantiated. The article analyzes the problems and prospects of development of export potential of Dnipropetrovsk region. One of the main trends in the export activity of the region is the increasing role of European countries as a trading partner, which was due, among other reasons, to the Association Agreement with the EU and the diversification of energy sources. A problematic aspect of export promotion is the lack of knowledge of WTO rules and conditions for entrepreneurs. The tendencies of export of the Dnipropetrovsk region during the pandemic and the possibility of mixed influence of Russia and cooperation with China have been investigated. There is no legislatively substantiated mechanism of interaction between the state and industry NGOs in Ukraine. Some efforts by the state to build a mechanism of power-business dialogue are not consistent. To promote these processes, structures were needed that could clearly state to the authorities their current requirements and defend the interests of their industries by all constitutionally possible means, that is, could position themselves and defend their interests in the state bodies of the executive power. The possibility of diversification of markets and intensification of promotion of goods to the markets of Asia is investigated.
Overcoming Poverty in the World and in Ukraine: Current State (on the Example of the NFP «Volunteering» and «Voluntourism»)
Authors:   Kyiv National University of Technology and Design, Boretskaya N. , Krapivina G. ,   Priazovsky State Technical University
Published: June 2021

In the article, the problem of overcoming poverty acquires further theoretical and methodological substantiation. The current state of overcoming poverty in the world and in Ukraine (on the example of non-standard forms of employment (NFP) "volunteering" and "voluntourism") in the global socio-economic and political aspects in the context of permanent changes and transformations of the world are considered. It is shown: international documents fix the existence of the problem of poverty and determine the main directions of the XXI century for overcoming it (on the example of the UN Millennium Declaration); the coronavirus pandemic has led to an increase in poverty; the main problem of overcoming poverty in Ukraine is the lack of a comprehensive system in the country that can effectively address poverty problems (government bodies are not involved in poverty prevention policies, but only fight with its consequences); in Ukraine, the most pressing problem is poverty among the working-age population and the poverty of families with children; poverty in Ukraine is characterized by a number of national characteristics (the UN notes that absolute poverty in Ukraine has been overcome. But relative poverty is 78%); solving the problem of overcoming poverty in Ukraine requires the development of a system of complex scientifically based and effective measures that should take into account the profile, specifics and features of the formation and spread of poverty, the causes of its occurrence and ways of overcoming it, as well as the most effective state policy for overcoming poverty and economic mechanisms for its implementation; world experience considers the NFP “volunteering” and “voluntourism” as forms of employment that can overcome the effect of abstraction of people from social problems and poverty, form a model of collective participation in the elimination of the latter, and restore human values; volunteering and voluntouring are supported by government agencies of the USA, Canada, Australia, England, Italy, Japan and other developed countries, including through the adoption of legislative acts that stimulate their development, the creation of a system of state volunteer centers and special programs of volunteering and voluntourism; Ukrainians attach great importance to volunteering and voluntourism in the development of social processes.
At the Core of Economic Educational, Scientific and Pedagogical Elaboration
Authors:   State Institution Luhansk Taras Shevchenko National University, Chebotarov V.
Published: June 2021

The article is dedicated to the 100th anniversary of one of the oldest institutions of higher education in the south-eastern Ukraine – Luhansk Taras Shevchenko National University. The achievements and contribution of LNU in the fields of pedagogy, history, geography, philology and linguistics, physics and mathematics, and Olympic sports are widely known in Ukraine and abroad. At the level of the best achievements there are also achievements of Luhansk Taras Shevchenko National University in the field of economic science, which is shown by the example of the modern department of economics, marketing and entrepreneurship. The author makes an attempt to establish historical justice in the history of world economics: to prove the unsurpassed importance of the developments of the former head of the department Vasily Antonovich Bader. In the late 1960 s, in parallel with the world-famous Ota Šik, in the context of the theory of "market socialism" he substantiated the doom and disintegration of the socialist economic system and its transformation into a market economy (much later, under other economic and socio-political conditions, Deng Xiaoping, the father of the "Opening of China", came to similar views). At the beginning of the 2000s, for the first time in Ukraine and Central and Eastern Europe, the department introduced a process of organizational and economic combination of research and educational activities – the establishment of a branch of the Institute of Industrial Economics of the National Academy of Sciences of Ukraine at the Luhansk Taras Shevchenko National University. With the beginning of the war in Donbass, the department became the first and only in Ukraine, on the basis of which was established a communication and consulting support center for leading international charitable organizations in Luhansk and Donetsk regions. The department has developed one of the first in Ukraine concepts of "Marshall Plan" for the Revival of the Donbas". The academic mobility experience of the department gained via the Visiting Professor program in teaching professional disciplines in Poland to students from the European Union, Asia and Africa under the ERASMUS+ Program is unique. Innovative are the practices of participation in the most prestigious European scientific and practical research projects, encouragement on a regular basis to the domestic educational process of leading entrepreneurs, teaching disciplines of free choice in English and cooperation with public authorities.
Modernization of Industry through Import Substitution and Localization of Production in Mechanical Engineering
Authors:   Institute of Industrial Economics of the NAS of Ukraine, Buleev I. , Bryukhovetska N. ,   Institute of Industrial Economics of the NAS of Ukraine, Chorna O. ,   Institute of Industrial Economics of the NAS of Ukraine
Published: June 2021

It is substantiated that the revival of self-sufficiency of the economy and industry requires the outpacing growth of national engineering, improvement of mechanisms to stimulate development, one of which is the government's policy on import substitution, including measures to localize production. The world experience of introduction of localization measures is considered. The difficulties of implementing measures to localize production in Ukraine have been studied. The expediency of introduction of measures of the government concerning localization of manufacture of production of branch of mechanical engineering in the course of public purchases is proved. It is determined that the protectionist policy on the development of the industrial sector, in particular the localization of production, is currently practiced by almost all countries of the world, primarily developed ones. The localization of production is considered in the scientific community from two opposite positions: 1) as a protectionist measure that does not promote economic growth and hinders the free movement of goods and capital; 2) as a government measure to support the development of national producers. The draft amendments to the regulatory framework in import substitution policy are analyzed: 1) Draft resolution of the Cabinet of Ministers "Some issues of implementation of the pilot project on procurement of machinery in the field of mechanical engineering with a confirmed degree of localization" until December 31, 2021; 2) Draft amendments to the Law of Ukraine "On Public Procurement" to create the conditions for sustainable development and modernization of domestic industry. Given that Ukraine has signed a number of international free trade agreements, it has been proved that it is necessary to define and substantiate in more detail its own interests, protection of national and economic security, legality of amendments to the law and the possibility of their implementation in Ukrainian legislation. The hypothesis of fixing a special regime for Ukraine for a certain period of time and establishing norms of localization of production for public procurement is substantiated.
Business Compliance Support Environmental Requirements in a Critical State of the Environment of Donbass
Authors:   Institute of Industrial Economics of the NAS of Ukraine, Liashenko V. , Tolmacheva A. ,   Institute of Industrial Economics of the NAS of Ukraine
Published: June 2021

The article is sanctified to research of key instruments of assistance to the small and middle business (SMB) entities in the observance of requirements of nature protection legislation and determination of ecological methods of doing business on the basis of the best experience of countries of EU and OERS. For the last fifteen years millions of businessmen and proprietors appeared in Ukraine. Thus there was a necessity of reduction of operating on the natural environment of SMB at producing goods and services. The authors of the article are consider the modern state of environment and loud speaker of development of ecological situation on territory of Donbas in connection with that Government of Ukraine is prerrange the input of experiment in relation to forming of territories of priority development in the Donetsk and Lugansk areas. In the article progress of SMB trends are reflected in the Donetsk area, that testify to the increase of enterprise sector of region. Authors are conduct research of foreign experience of providing of observance of ecological requirements by the subjects of SMB. Providing of observance of ecological requirements the subjects of SMB are by a serious problem for nature protection organs in the whole world, not in the last turn because for this category of enterprises characteristic features that hamper application of traditional methods of observance of implementation of requirements. Quantitative determination of operating on an environment, related to activity of SMB, is important pre-condition for making of adequate ecological policy in relation to these companies, and also strategies and programs in relation to providing of inhibition by them normatively-legal requirements. The Normatively-legal base of Ukraine in a greater degree assists to development of SMB and foresees the decline of the administrative loading on enterprises, and also having a special purpose support of small and middle business. In the river-bed of these tendencies the primary purpose of activity of nature protection organs of Ukraine consists in development and realization oriented to the result and the concerted going near the increase of awareness on nature protection questions and ecological effectiveness of small and middle business. Recommendations are offered in relation to support of observance of ecological requirements by the subjects of SMB of Ukraine.
National Business Culture of Ukraine and the Profile of a Ukrainian Marketer
Authors:   State Institution Luhansk Taras Shevchenko National University, Chebotarov Ie.
Published: June 2021

The article attempts to consider a problem that has not yet been the subject of systematic developments in domestic and foreign science – the analysis of the profile of a Ukrainian marketer. This problem is investigated on the basis of the proposed new methodological approach: the recognition of the determinism of the profile of a marketer of a country (as well as in general – the profile of the entrepreneur) content and features of the national business culture of the country. The proposed approach logically necessitated a comparative analysis of the national business culture of Ukraine. This analysis was performed using the appropriate measuring parameters of modern economic comparativistics ("power distance", "individualism", "masculinity", "uncertainty avoidance", "long-term orientation", "indulgence") in comparison with Western, Central and Eastern Europe and the South East. The uniqueness of the national business culture of Ukraine is identified, which consists in its multiculturalism: in the organic combination of western (Anglo-Saxon) and eastern (south-eastern) entrepreneurship; with special respect for other religions and denominations. The characteristic features of the profile of a Ukrainian marketer are singled out (they, as well as the features of the profile of an entrepreneur of any country at all times, contain both positive and negative properties). A Ukrainian marketer: as a rule, is excluded from making fundamental decisions, which "pushes" him to the steps of "guerilla marketing"; he is more prone to collective forms of activity (but with hidden ambitious individual traits); in professional activity understands the value of life and wealth for the domestic consumer and consumer behavior as such; feels internal discomfort in conditions of uncertainty and special risk; the advantage of a Ukrainian marketer is activity in industries with long-term capital turnover and in the field of complex marketing research; domestic marketer to some extent still retains the properties of social orientation in business (but the dominant of his entrepreneurial consciousness are negative expectations).
Everyone's Invited: Have we done enough?
Authors: Rose Elizabeth
Published: June 2021

The Everyone's Invited revelations and Ofsted's review of sexual harassment and abuse in schools has clear implications for safeguarding practice. Elizabeth Rose advises how we can review our safeguarding structures around sexual harassment, violence and abuse
From vision to impact: Strategic school leadership
Authors: Solly Ben
Published: June 2021

A school's strategic education plan brings together its vision and values, achieving buy-in from the staff and community. In this Best Practice Focus, headteacher Ben Solly sets out his approach and offers practical advice. He discusses his vision, values and priorities, how to create highly effective teams, and how this all links to impact and outcomes
The First 100 Days: Lessons from football
Authors: Denton Phil
Published: June 2021

Headteacher Phil Denton has spent the last 30 months talking to Premier League managers about the lessons we can draw from the high-pressure, unforgiving world of football management, especially when it comes to tackling the first 100 days in post…
Flexibly modulated Poincaré sphere vector optical field in input and focal planes
Authors: Wang Meng-Shuai , Gao Xu-Zhen , Zhao Jia-Hao , Sun Xue-Feng , Pan Yue , Xia YunJie
Published: June 2021

We theoretically design and experimentally generate the flexibly modulated Poincaré sphere vector optical field (PS-VOF), which can be constructed by flattening the Poincaré sphere surface. This new kind of PS-VOF provides additional degrees of freedom to modulate the spatial structure of polarization based on Poincaré sphere. The focal property of the PS-VOF is further studied, and we focus on studying the polarization coverage of the Poincaré sphere in the focal plane. In focusing process, the conversion and annihilation of spin angular momentum are presented. In addition, when the proportion of right-handed polarizations from the northern hemisphere of the Poincaré sphere satisfies Golden ratio (0.618) in the input plane, a full PS-VOF with high quality can be achieved in the focal plane. We hope this study of PS-VOF in both input and focal planes can enrich the family of VOFs, provide a new avenue in studying VOFs based on the Poincaré sphere, and can be potentially applied in the regions with sensitivity to polarizations.
Influence of Kerr nonlinearity on propagation characteristics of twisted Gaussian Schell-model beams
Authors: Hu Jing , Ji Xiaoling , Wang Huan , Deng Yu , Li Xiaoqing , Wang Tao , Zhang Hao
Published: June 2021

The analytical propagation formulae of twisted Gaussian Schell-model (TGSM) beams through nonlinear Kerr media are derived. It is found that a TGSM beam is less sensitive to Kerr nonlinearity than a Gaussian Schell-model (GSM) beam. Furthermore, the propagation characteristics of TGSM beams with stronger twist and worse spatial coherence are less affected by Kerr nonlinearity. The self-focusing effect enhances the beam twist, but degrades the beam spatial coherence. In the atmosphere (one kind of self-focusing media), a TGSM beam has greater resistance to self-focusing effects and atmospheric turbulence effects than a GSM beam or an ideal Gaussian beam.
Hollow-glass-microsphere-assisted half-circle interference for hydrostatic pressure measurement with high sensitivity
Authors: Sun Hang , Zhang Xiaobei , Liu Xiaochen , Wang Zijie , Yu Yang , Yang Yong , Deng Chuanlu , Huang Yi , Wang Tingyun
Published: June 2021

We propose and demonstrate a half-circle interferometer using a hollow glass microsphere (HGM) resonator. The half-circle interference is induced by a mismatch between the fundamental mode in the HGM and the modes in the capillary wall. The theoretical model is verified by comparing the simulated and experimental results. The variation in capillary length induced by the axial pressure contributes the most to the half-circle interference, which features a device with a high hydrostatic pressure sensitivity of −1.099 nm/kPa. This device shows potential as a hydrostatic pressure sensor owing to its stability, high sensitivity, and robustness.
Cumulative defocusing of sub-MHz-rate femtosecond-laser pulses in bulk diamond envisioned by transient A-band photoluminescence
Authors: Kudryashov Sergey , Stsepuro Nikita , Danilov Pavel , Smirnov Nikita , Levchenko Alexey , Kovalev Michael
Published: June 2021

High-rate direct femtosecond (fs) laser writing is a well-established technology for fabricating various micro-optical elements in bulk dielectrics. In this technology, the “heat accumulation” effect, occurring during high-repetition rate (∼ 1 MHz) exposure in dielectrics by a fs laser, enables ultralow-energy micro-modification via cumulative heating. Meanwhile, in this work in the transient multi-photon A-band photoluminescence studies, we demonstrate that this effect underlies dynamic thermal lensing even in diamond with its high thermal conductivity, dynamically shifting the laser focus upstream. Our study paves the way for more precise, accurate and robust direct fs-laser writing of advanced three-dimensional structures in diamond and other dielectrics for a variety of photonic applications.
Automated photonic tuning of silicon microring resonators using a 3D-printed microfluidic mixer
Authors: Carver Christian , Boaks Mawla , Kim JuHang , Larson Kevin , Nordin Gregory P. , Camacho Ryan M.
Published: June 2021

We demonstrate a method to automate the tuning of microring resonators using 3D-printed microfluidic control capable of resonance wavelength shifts of 4 nm. We use a custom 3D-printer that can fabricate microfluidic devices with sub-10 μm features and that perform automatic pumping, mixing, and dilution operations.
Evaluation of Doppler Study of Umbilical Artery in Prolonged Pregnancy– A Study from Andhra Pradesh, India
Authors: Gundu Vanaja , Chikile Ganga Devi , Ponnada Geetha Kumari
Published: June 2021

BACKGROUND The American College of Obstetricians and Gynecologists (ACOG) and WHO (World Health Organization) define a pregnancy continuing two weeks beyond expected date of delivery as post term pregnancy. Any pregnancy which has passed beyond the expected delivery date is defined as prolonged or post-dated pregnancy. Application of Doppler ultrasound allows for examination of blood flow direction, velocity and volume of various vessels. Doppler velocimetry of umbilical artery in post-dated pregnancy has been suggested as a means of assessing fetal wellbeing. In prolonged pregnancy, the first step of management is an accurate diagnosis and antenatal care includes accurate dating of pregnancy, fetal surveillance and the option of induction of labour or expectant management or Caesarean section. We wanted to analyse the blood flow in umbilical artery using Doppler ultrasound in post-dated pregnancy and analyse the perinatal outcome in post-dated pregnancies with respect to normal and abnormal doppler wave forms. METHODS This is a prospective study conducted at Department of Obstetrics and Gynaecology, Government Victoria Hospital (GVH), Visakhapatnam, from April 2016 to April 2017. 110 pregnant women who were beyond the expected date of delivery (EDD) according to menstrual history and early weeks scan were selected from the antenatal ward and labour room. RESULTS In the present study, 52.73 % women with prolonged pregnancy were primi gravida and 67.27 % women were between the gestational ages of 40 - 41 weeks. Doppler studies were abnormal in 13.64 % (15 women). 78.1 % women with prolonged pregnancy had normal vaginal delivery, Caesarean section was done in 17.3 % and 4.6 % had instrumental delivery. 99.09 % of babies were live born and one was stillborn. Two babies died in early neonatal period due to meconium aspiration. CONCLUSIONS Doppler study of umbilical arteries is a useful noninvasive procedure to reduce the perinatal morbidity and mortality in prolonged pregnancy. KEY WORDS Antepartum Fetal Surveillance, Birth Asphyxia, Doppler Study, Intrauterine Death, Perinatal Outcome, Prolonged Pregnancy, Pulsatility Index, Resistance Index
Effect of Posterior Bite Raiser on Periodontium of Lower Molars in Orthodontic Patients
Authors: Prasad Arya S. , Sivakumar Arvind
Published: June 2021

BACKGROUND Temporary bite opening with occlusal composite is performed routinely during orthodontic treatment of patients with deep bite and cross bite. There have been no studies yet to assess its effect on periodontium. This study was done to assess the effect of temporary bite-raising on periodontium when placed on the mandibular molars. METHODS A prospective clinical trial which was a pilot study conducted on fifteen subjects attending the Department of Orthodontics, Saveetha Dental College and Hospitals, (SIMATS), Chennai. Probing depth and pain score on percussion were recorded bilaterally on subjects with class 1 malocclusion, before and after placing bite blocks in the posterior teeth. The bite-raising was done using light cured orthodontic composite Blu BiteTM on both mandibular first molars. Probing depth was measured using a Williams probe at mesiobuccal, mid-buccal and distobuccal sites on molars and pain score on percussion was recorded using visual analogue scale. The pocket probing, before (T0) and after one month of temporary bite-raising (T1) was recorded and statistically analysed using paired t test and Wilcoxon sign rank test based on normality of variables. RESULTS There was a significant increase in the mean probing depth after bite raising with a mean difference of 1.07 ± 0.04 (P = 0.000). The mean pain score also significantly increased after temporary bite-raising (P = 0.002). CONCLUSIONS There were minor yet significant changes in the periodontium that occurred after temporary bite rising with Blu BiteTM. KEY WORDS Composite Resin, Periodontium, Occlusal Force, Orthodontic Adhesive, Visual Analogue Pain Scale
Clinical Study on Ocular Manifestations in Patients with Psoriasis, in Chennai, India
Authors: Subramanian Anandhalakshmi , Prabhakar Suhas , M.S. Joshmitha , Kim Gowtham
Published: June 2021

BACKGROUND We wanted to determine the prevalence of ocular manifestations assess the frequency and distribution of potential sight threatening complications in patients with psoriasis. METHODS This is a non interventional, observational hospital based study conducted at a tertiary health care centre which included 105 patients with psoriasis. A background history was taken regarding the duration of psoriasis and treatment taken. The prevalence of ocular manifestations were assessed by detailed ocular examination which involved the best corrected visual acuity using Snellen’s chart, examination of the anterior chamber using slit lamp, examination of the fundus, intraocular pressure measurement, dry eye evaluation including Schirmer’s test, tear film break up time test, and Rose Bengal stain test. RESULTS In total 105 patients with psoriasis were enrolled in this study. Among the 105 patients whose 210 eyes were examined, 77 % had psoriasis vulgaris, 14 % had scalp psoriasis, and 9 % had palmoplantar psoriasis. Among the 105 patients, 38 patients had symptomatic ocular manifestations. Out of the 38 % patients with symptomatic ocular manifestations, we found that 28 %, 25 %, 17 %, 2 % of the patients manifested with evaporative dry eye, blepharoconjunctivitis, redness and episcleritis respectively. CONCLUSIONS In our study, ocular manifestations were even seen among the asymptomatic patients. Hence a multi-disciplinary approach including effective screening and early detection of ocular manifestations followed by prompt treatment is essential to reduce the morbidity in patients with psoriasis. KEY WORDS Psoriasis, Dry Eye, Uveitis
A Study on Variations of Nutrient Foramen of Humerus in Kurnool, Andhra Pradesh, India, and Its Clinical Relevance
Authors: Subramanyam Govula , Chittinarasamma Kategari , Jayamma Chaluvadi , R. Somasekhar
Published: June 2021

BACKGROUND Nutrient foramen of humerus is an opening in the shaft of humerus which conducts nutrient vessels for medullary cavity. Major source of blood supply to long bone is the nutrient artery. Knowledge regarding nutrient foramen is important for orthopaedic surgeons while doing any procedure on humerus like bone grafting, plating and also plays an important role in fracture healing. We wanted to determine the location, number, and direction of nutrient foramen of humerus. METHODS The observational study was conducted on 72 adult humeri (36 of right side and 36 of left side) collected from Department of Anatomy, Kurnool Medical College, Kurnool, Andhra Pradesh from 15th September to 31st October 2020. Each humerus was observed for location, number, and direction of nutrient foramen in relation with surface, border andzone. RESULTS In the present study it has been observed that 61 % of humeri had a single foramen, 31 % had two foramina and 8 % had 3 foramina. Majority of nutrient foramina (54.95 %) were present on antero-medial surface, 12.08 % on anterolateral surface, 12.08 % on posterior surface, 19.78 % on medial border, and 1.09 % on lateral border. It was also concluded that most (94.50 %) of the foramina were present in the zone II followed by zone III (3.30 %) then by zone I (2.19 %). CONCLUSIONS Knowledge of number and location of the nutrient foramina in humerus will be helpful in preventing intra-operative injury of nutrient artery during orthopaedic, plastic and reconstructive surgery; and will also be relevant in medico legal practice. KEY WORDS Nutrient Foramen, Humerus, Nutrient Artery, Foraminal Index, Clinical Implications
Comparative Evaluation of the Rheological Properties, upon Addition of Water, of Three Commercially Available Zinc Oxide Eugenol Impression Materials
Authors: Dandekeri Savitha , D’Souza Rochelle , Prabhu Uma Mayoor , Shetty Sanath Kumar , Suhaim Karkala Sayed , Feroz Fowzaan
Published: June 2021

BACKGROUND Zinc oxide eugenol (ZOE) impression paste is commonly used for secondary impression. Water acts as an accelerator to zinc oxide eugenol paste. Study was carried out to determine its flow property and the effect of addition of water on flow properties for different commercially available zinc oxide eugenol impression pastes. We wanted to compare and evaluate the flow properties of ZOE impression paste without water and after addition of water as an accelerator for three different commercially available zinc oxide eugenol impression pastes. METHODS Three commercially available zinc oxide eugenol impression pastes used were - DPI (Dental Product of India), Neogenate (Septodont), IMAGE (Prime Dental Pro.Ltd). A total of 15 discs were made without accelerator and with addition of 1, 2 and 3 drops of water for the three brands of the zinc oxide eugenol paste. Then the flow of each was tested. Data of flow was analysed using one way- ANOVA and post hoc test. RESULTS It was found that the mean flow of zinc oxide eugenol impression paste without the use of accelerator for DPI, Septodont, Image was 4.72 ± 0.56, 4.20 ± 0.75, and 3.50 ± 0.57 respectively. The mean flow of zinc oxide eugenol impression paste with the use of one drop of accelerator for DPI, Septodont, Image was 4.98 ± 0.3493, 4.54 ± 0.6025, and 3.940 ± 0.4722 respectively. With the use of two and three drops of accelerator for DPI was 4.18 ± 0.7259 and 2.68 ± 0.3701, for Septodont was 3.880 ± 0.6907 and 2.32 ± 0.2775 and for Image flow was 3.20 ± 0.5745 and 1.80 ± 0.4000. CONCLUSIONS DPI had the maximum flow as compared to other brands of zinc oxide eugenol impression paste. KEY WORDS Zinc Oxide Eugenol, Impression Material, Flow, and Accelerator
Sternal Involvement in Anterior Mediastinal Seminoma - A Rare Presentation
Authors: Dhande Rajasbala Pradeep , Vaidya Shirish V. , Manoj Megha , Singh Rohan Kumar , K.B. Harshith Gowda
Published: June 2021

Primary malignant extra gonadal germ cell tumours (GCT) of mediastinum are very rare tumours, comprising 1 - 4 % of all mediastinal tumours.1 Even though they are rare tumours of mediastinum, they should always be considered in the differential diagnosis of mediastinal tumours in young adults. Primary malignant GCT can be divided into 2 groups: Seminomatous and non-seminomatous tumours. Mature teratomas (non-seminomatous) are the most common primary malignant germ cell tumours of mediastinum.2 Non-seminomatous tumours tend to be more aggressive than seminomatous tumours present as heterogeneous masses with areas of necrosis and show local invasion. Seminomas usually present as lobulated homogeneous masses and rarely show signs of local invasion. These tumours usually present with asymptomatic lesions or with symptoms due to compression of adjacent structures and usually have a better prognosis than non-seminomatous tumours. Here, we present a case of primary malignant extra gonadal seminoma with sternal involvement.
Disseminated Abdomino-Throracic Hydatidosis Presenting as Mediastinal Syndrome
Authors: Andhale Amol , Acharya Sourya , Devde Kanchan , Shukla Samarth
Published: June 2021

Hydatid disease, one of the most geographically widespread zoonoses is caused by tape worm Echinococcus granulosus. It is endemic in areas with increased cattle grazing with substantial disease burden. We report a case of a male who presented with symptoms and signs of mediastinal compression and was diagnosed to have disseminated hydatid disease.
Parathyroid Adenoma - From Surgical to Biochemical Cure
Authors: Mehta Rupa , Nagarkar Nitin M. , S.S. Satish , Arora Ripu Daman , Das Jyoti Ranjan
Published: June 2021

Parathyroid glands, minute endocrine glands, located in posterior aspect of thyroid glands secrete parathormone which plays an important role in maintaining calcium homeostasis in the body. The superior and inferior parathyroid glands originate from the 4th and 3rd branchial pouches respectively and migrate to occupy their normal positions in relation to the thyroid gland.1 Hyperparathyroidism is defined as hyper functioning of parathyroid gland and can be primary, secondary or tertiary. Primary hyperparathyroidism is due to parathyroid gland proliferative disorders which include parathyroid adenoma, parathyroid hyperplasia, parathyroid carcinoma or in association with other conditions in MEN syndrome. In more than 90 % patients, primary hyperparathyroidism is caused by a single parathyroid adenoma. Very rarely double parathyroid adenomas are seen. Secondary Hyperparathyroidism is caused in response to any chronic hypocalcaemic conditions like renal failure, gastrointestinal malabsorption, dietary rickets & drugs, like phenytoin, phenobarbital & laxative. Prolonged secondary hyperparathyroidism leads to tertiary hyperparathyroidism due to autonomous secretion. The clinical presentation of hyperparathyroidism is classically described as kidney stones, abdominal groans, painful bones, psychic moans, and fatigue overtones. In the initial course of the disease, the patients present with vague symptoms of fatigue, muscle and joint pain, frequent urination, nausea, constipation, and decreased appetite. If high index of suspicion is maintained, they can be conveniently diagnosed by routine blood tests which show increased calcium levels. However, in India still majority of people are diagnosed when they present with palpable neck mass, skeletal manifestations or deranged renal function. We hereby present 5 cases of parathyroid adenoma managed at our centre over a period of 2 years. P
Mobile Phone Assisted 3D Extra Oral Scanner for Acquiring Dental Digital Models - An Innovative Approach
Authors: Abhijeet Kapoor , Mody Eesha , J. Brintha Jei , John Peter , Krishnan Murugesan , B. Muthukumar
Published: June 2021

An accurate impression of the edentulous arch is of utmost importance in the rehabilitation of completely edentulous cases. The steps that follow the impression making are highly influenced by the accuracy of the impression. In order to overcome the manual inadequacies and to improve the accuracy, various advancements have been made manually as well as digitally. Computer-aided design/computer-aided manufacturing (CAD / CAM)is one such digital advancement, which primarily aims at scanning the edentulous arches, followed by subsequent designing of the dentures and processing through various methods such as milling or 3d printing. A major drawback of using CAD / CAM technology is its high cost. Photogrammetry, as a proof of concept, works on the principle of obtaining reliable information about physical objects through the process of recording, measuring and interpreting photographic images. Recently photogrammetry has been gaining interest in the field of dentistry. It can be used as a more cost-effective alternative for diagnosis, treatment planning and fabrication of surgical guides and in maxillofacial prosthetics. In the current article, a novel 360-degree mobile phone scanner was devised which rotates around the object and takes images in order to compute a 3d image, which can be further used for treatment planning and fabrication of dentures.
Evaluación de la prueba Fluorecare de anticuerpos contra la proteína Spike del SARS-CoV-2 en la práctica real
Authors: Salvagno Gian Luca , Gianfilippi Gianluca , Pighi Laura , De Nitto Simone , Henry Brandon M. , Lippi Giuseppe
Published: June 2021

Objetivos

A la luz de la elevada eficiencia diagnóstica de las pruebas rápidas de detección de antígenos (Ag-RDT) contra el coronavirus de tipo 2 causante del síndrome respiratorio agudo severo (SARS-CoV-2), se realizó un estudio con el fin de evaluar el rendimiento clínico de la prueba de antígenos contra la proteína Spike del SARS-CoV-2 en un escenario real.

Métodos

La población de estudio estaba formada por pacientes que se sometieron a una prueba diagnóstica ordinaria del SARS-Cov-2 en el Hospital Pederzoli de Peschiera del Garda (Verona, Italia). Se tomó una muestra de exudado nasofanríngeo en el momento del ingreso, que se sometió a un análisis molecular (Altona Diagnostics RealStar® SARSCoV-2 RT-PCR Kit) y de antígenos (Prueba Fluorecare de Antígenos contra la proteína Spike del SARS-CoV-2).

Resultados

La población de estudio estaba compuesta por 354 pacientes (edad media, 47±20 años; 195 mujeres, 55,1%), de los cuales 223 (65,8%) obtuvieron un resultado positivo en el análisis molecular. Se observó una correlación significativa entre la prueba Fluorecare y Altona (para los genes S y E: r=−0,75; p<0,001). El área bajo la curva acumulada en todas las muestras nasofaríngeas fue de 0,68. A un índice S/CO ≥1,0, indicado por el fabricante, la sensibilidad, especifidad y valor predictivo negativo y positivo fueron del 27,5%, 99,2%, 41,5% y 98,5%, respectivamente. La sensibilidad se mostró inversamente proporcional a los valores de Ct, llegando al 66,7% en las muestras con valores medios de Ct <30, al 90,5% en aquellas con valores medios de Ct <25, y hasta al 100% en las muestras con valores medios de Ct <20.

Conclusiones

Dada la modesta sensibilidad y moderado valor predictivo negativo de la prueba de Fluorecare, no se recomienda sustituir con esta prueba el análisis molecular para el diagnóstico de infección por SARS-CoV-2, aunque su adecuada sensibilidad confirma su fiabilidad para el cribado de pacientes con mayor potencial infeccioso.
Compact dual-band balanced bandpass filter based on circular SIW cavity
Authors: Zhang Sheng , Ji Chao , Tong Meng-Han , Xie Zhen-Jiang , Xu Cong
Published: June 2021

A compact dual-band balanced bandpass filter with high frequency selectivity and adjustable passband based on the perturbed circular substrate integrated waveguide cavity is firstly proposed in this paper. Two pairs of metallic vias are located at 45°direction of cavities to separate a pair of degenerate modes (TM110 modes) to achieve the differential-mode (DM) dual-band response. Moreover, the perturbation vias can also be used to control the center frequency of the second DM passband while the first one still stays unaffected. The introduction of source-load coupling makes the filter exhibit excellent selectivity. And four controllable transmission zeros appear near two DM passbands. Finally, good common-mode suppression has been got owing to the proposed balanced structure. The measured results are in accordance with the simulated ones well.
Urinary bisphenol A in women with polycystic ovary syndrome – a possible suppressive effect on steroidogenesis?
Authors: Lazúrová Zora , Figurová Jana , Hubková Beáta , Mašlanková Jana , Lazúrová Ivica
Published: June 2021

Objectives

There is a growing evidence indicating an impact of endocrine distrupting chemicals such as bisphenol A (BPA) on human reproduction. Its higher levels in serum or urine have been documented in women with polycystic ovary syndrome (PCOS), however the relationship to ovarian steroidogenesis remains unclear.

Aim of the study was to compare urinary BPA (U-BPA) concentrations among PCOS women and control group. Second aim was to assess the relationship of U-BPA to ovarian steroidogenesis in the group with PCOS.

Methods

Eighty six Caucasian women (age 28.5 ± 5.1 years) diagnosed with PCOS and 32 controls of age 24.9 ± 4.4 years were included in the study. Fasting blood samples were analyzed for biochemical parameters and steroid hormones. U-BPA was measured in the morning urine sample using high pressure liquid chromatography.

Results

PCOS women had significantly higher U-BPA as compared with control group (p=0.0001). Those with high levels of U-BPA (U-BPA ≥2.14 ug/g creatinine) demonstrated higher serum insulin (p=0.029) and HOMA IR (p=0.037), lower serum estrone (p=0.05), estradiol (p=0.0126), FSH (p=0.0056), and FAI (p=0.0088), as compared with low-BPA group (U- BPA <2.14 ug/g creatinine). In PCOS women, U-BPA positively correlated with age (p=0.0026; R2=0.17), negatively with estradiol (p=0.0001, R2=0.5), testosterone (p=0.0078, R2=0.15), free-testosterone (p=0.0094, R2=0.12) and FAI (p=0.0003, R2=0.32), respectively.

Conclusions

PCOS women have significantly higher U-BPA concentrations than healthy controls. U-BPA positively correlates with age and negatively with ovarian steroid hormones suggesting a possible suppressive effect of bisphenol A on ovarian steroidogenesis.
Evolution of reduction process from tungsten oxide to ultrafine tungsten powder via hydrogen
Authors: Wang Yue , Long Ben Fu , Liu Chun Yu , Lin Gao An
Published: June 2021

Herein, the evolution of reduction process of ultrafine tungsten powder in industrial conditions was investigated. The transition process of morphology and composition was examined via SEM, XRD, and calcination experiments. The results show that the reduction sequence of WO2.9 was WO2.9 → WO2.72 → WO2 → W on the surface, but WO2.9 → WO2 → W inside the oxide particles. With the aid of chemical vapor transport of WO
x
(OH)
y
, surface morphology transformed into rod-like, star-shaped cracking, floret, irregularly fibrous structure, and finally, spherical tungsten particles.
Non-isothermal blade coating analysis of viscous fluid with temperature-dependent viscosity using lubrication approximation theory
Authors: Khaliq Sabeeh , Abbas Zaheer
Published: June 2021

Blade coating process is studied in a nonisothermal analysis of viscous fluid with temperature-dependent viscosity by employing both plane and exponential coaters. The governing expressions are nondimensionalized and simplified under the assumption of lubrication approximation theory. Then, perturbative technique is used to find the solution for velocity, pressure, temperature distribution, and coating thickness. The influence of dimensionless parameter ε, Graetz number Gz, and normalized coating thickness γ on the velocity, maximum pressure, temperature distribution, and pressure gradient is portrayed through graphs, whereas load and coating thickness variations reported in a tabular manner. It is found that maximum pressure, coating thickness, and blade load decreases for temperature variations in viscosity, which leads to improved efficiency of blade coating process and life of the moving substrate.
Distant time, distant gesture: speech and gesture correlate to express temporal distance
Authors: Alcaraz Carrión Daniel , Valenzuela Javier
Published: June 2021

This study investigates whether there is a relation between the semantics of linguistic expressions that indicate temporal distance and the spatial properties of their co-speech gestures. To this date, research on time gestures has focused on features such as gesture axis, direction, and shape. Here we focus on a gesture property that has been overlooked so far: the distance of the gesture in relation to the body. To achieve this, we investigate two types of temporal linguistic expressions are addressed: proximal (e.g., near future, near past) and distal (e.g., distant past, distant future). Data was obtained through the NewsScape library, a multimodal corpus of television news. A total of 121 co-speech gestures were collected and divided into the two categories. The gestures were later annotated in terms of gesture space and classified in three categories: (i) center, (ii) periphery, and (iii) extreme periphery. Our results suggest that gesture and language are coherent in the expression of temporal distance: when speakers locate an event far from them, they tend to gesture further from their body; similarly, when locating an event close to them, they gesture closer to their body. These results thus reveal how co-speech gestures also reflect a space-time mapping in the dimension of distance.
The Short Story, the New Weird, and the Literary Market
Authors: Zähringer Raphael
Published: June 2021

The short story is commonly – and very productively – treated in the spirit of critical terms such as marginality and liminality. Quite surprisingly, though, New Weird Fiction, which postulates similar interests in, e.g., formal and aesthetic innovation as well as literary ambition, is primarily associated with the novel. The underlying lack of interest in the New Weird Short Story in both popular culture and academic work is scrutinised in this article. In a first step, it will survey the short story as a liminal form, both formally and aesthetically, and contextualize it by drawing upon the state of the literary market in the twenty-first century. The contribution’s main argument is that the short story has always either been considered to be too ‘popular’ or too ‘literary’ in order to contest the novel as the prevalent literary form. Step two will perform a similar move regarding Weird Fiction, thus highlighting the parallels between the short and the Weird, and the need for more academic attention dedicated to the New Weird short story.