bluuebunny/crossref_metadata_2025 huggingface dataset:
Programa de saúde vocal para professores do ensino superior
Authors: Rodrigues Susana , Baptista Ana Catarina
Published: September 2021

A efetividade da comunicação em sala de aula passa pela utilização adequada da voz pelo professor. O recurso a esta estratégia pedagógica para transmitir conhecimentos aos seus estudantes coloca os professores entre os grupos profissionais que apresentam maior risco de desenvolver alterações vocais ao longo da sua carreira. Este trabalho tem como objetivo relatar a experiência de implementação de um programa de saúde vocal para um grupo de docentes do ensino superior. Para além da apresentação dos pressupostos, do funcionamento e da organização dos conteúdos deste programa, são ainda apresentados os principais resultados da percepção dos participantes em relação ao funcionamento da proposta. Os dados mostram que, globalmente, os participantes avaliaram de forma positiva o programa, apresentando contribuições para a melhoria de propostas futuras de iniciativas de prevenção e promoção da saúde vocal dos professores do ensino superior.
Ruta de la creatividad para la apropiación social de la ciencia, la tecnología y la innovación: Una guía de apoyo para educadores y actores comunitarios
Authors: Duque Romero Claudia Alejandra , Duque Aristizábal Claudia Patricia , Henao Morales Laura Yamile , Velásquez Sarria Jairo Andrés
Published: September 2021

Esta cartilla se trata de un recurso de apoyo para los educadores, y es resultado de las experiencias obtenidas durante la Implementación de una estrategia de apropiación de la ciencia, la tecnología e innovación (CTeI) que promueva el pensamiento crítico en niños, niñas y jóvenes de las Instituciones Educativas (IE) del Tolima, liderado por la Gobernación del Tolima y ejecutada por la Universidad de Ibagué, con la colaboración de la Universidad del Tolima. Por lo cual, este material educativo se constituye en un recurso de apoyo para que estudiantes y educadores, en colaboración con la comunidad, trabajen juntos en el reconocimiento de sus territorios, en la identificación de su problemática y en el planteamiento de alternativas de solución, por medio de la implementación y evaluación de la estrategia denominada ruta de la creatividad. Esta busca, además, despertar el interés, la curiosidad y la motivación por la investigación, la ciencia, la tecnología y la innovación.
Low molecular weight heparin prophylaxis for placenta-mediated complications in women with F2G20210A mutation
Authors: Nikolaeva M. G. , Yasafova N. N. , Momot A. P. , Zainulina M. S. , Taranenko I. A.
Published: September 2021

Introduction. A prothrombin-mutant genotype is a known risk factor in gestational complications.

Aim — efficacy assessment in pregravid heparin prevention of pre-eclampsia (PE) and foetal growth retardation (FGR) in females with F2G20210A genotype and suprathreshold prothrombin activity.

Patients and methods. A single-centre randomised controlled study enrolled 80 pregnant women carrying prothrombin F2G20210A. The inclusion criterion was a pregravid plasma prothrombin activity > 171 %. The study cohort consisted of 50 women (mean age 31.2 ± 3.7 years) receiving low molecular-weight heparin (LMWH) in menstrual cycle at weight-based elevated prevention doses. A comparison group comprised 30 pregnant women (mean age 31.3 ± 2.9 years) not receiving LMWH prophylaxis.

Results. A pregravid start of LMWH treatment at high prophylactic doses in F2G20210A genotype carriers with prothrombin activity > 171 % allowed an absolute risk reduction (ARR) of PE by 46.7 % [p = 0.0001; number needed to treat (NNT): 2.1; 95 % confidence interval (CI) 3.4–1.56], severe PE by 30.7 % [p = 0.0001; NTT: 3.3; 95  % CI (6.7–2.2)] and FGR by 30.7 % [p = 0.0001; NTT: 3.3; 95 % CI (6.7–2.2)].

Conclusion. Use of LMWH is justified in prevention of placenta-mediated complications in F2G20210A genotype carriers with a suprathreshold-high prothrombin activity.
The Role of epigenetic modifications of DNA and histones in the treatment of oncohematological diseases
Authors: Karpenko D. V. , Petinati N. A. , Drize N. J. , Bigildeev A. E.
Published: September 2021

Introduction. Current knowledge of tumour biology attests a dual genetic and epigenetic nature of cancer cell abnormalities. Tumour epigenetics research provided insights into the key pathways mediating oncogenesis and facilitated novel epigenetic therapies.

Aim — an overview of intricate involvement of epigenetic change in haematological morbidity and current therapeutic approaches to target the related mechanisms.

Main findings. We review the best known epigenetic marks in tumour cells, e.g. DNA cytosine methylation, methylation and acetylation of histone proteins, the underlying enzymatic machinery and its role in oncogenesis. The epigenetic profile-changing drugs are described, including DNA hypomethylating agents, histone deacetylase and methylase inhibitors. A particular focus is made on substances currently approved in haematological therapy or undergoing clinical trial phases for future clinical availability.
Photostability of organic electro-optic polymer under practical high intensity continuous-wave 1550 nm laser irradiation
Authors: Tominari Yukihiro , Yamada Toshiki , Kaji Takahiro , Yamada Chiyumi , Otomo Akira
Published: September 2021

Information on the photochemical stabilities of organic electro-optic (EO) polymers under laser irradiation at 1550 nm, in the optical communication wavelength band (C-band), is crucial for understanding the long-term stability of various optical devices that employ EO polymers and providing guidelines for extending the devices’ lifetime. Thus, in this study, we constructed a pump–probe photostability evaluation system with an intensity of as high as 1.49 MW cm−2 and intensively investigated the photochemical stability of an EO polymer at 85 °C under irradiation by using a continuous-wave (CW) 1550 nm laser. We found that the photobleaching rate was proportional to the square of the pump intensity, suggesting that the dominant photodegradation pathway was associated with two-photon absorption. Our findings provide new insights into a photobleaching mechanism under non-resonant CW laser excitation conditions.
Enhancing The Inherent Coping Mechanism of Teachers in The Course of Health and Security Crisis
Authors: Galleposo Gabriel T.
Published: September 2021

There is a limited number of studies on why people, specifically teachers, can immediately cope with health and security crisis, and continue to live their lives as normally as those who have not experienced such events in their lives, hence, the necessity to conduct this study. It explored the factors that influenced their coping mechanisms through exploratory sequential mixed method, involving respondents from seven schools district of Zamboanga Sibugay Division and from one school district of Lanao del Sur. The qualitative data  gathered from 10 respondents through face-to-face interview and focused group discussion  arrived at the factors that influenced the inherent coping mechanisms, namely: family, faith, profession, alliance, self-reliance, and service.  The quantitative data  gathered from 131 respondents through a researcher-made survey instrument  were subjected to Pearson coefficient of correlation, t-test, weighted mean,  and stepwise regression. It is   concluded that faith, family, alliance, and profession wield a significant influence in the coping mechanisms of the respondents. Experience, and training were also found to have a differentiating performance in coping from health and security crisis;  and that success in coping from catastrophic situations depends greatly on these factors.  This study further proposed a model which can be used as basis in designing mental, spiritual, emotional, and social health programs to enhance the inherent coping mechanisms of teachers.
Quality Assessment of Sandcrete Blocks Produced Along-Oke Fomo Area, Ilorin, Kwara State
Authors: Yiosese A. O
Published: September 2021

In this study, the quality of sandcrete blocks produced along Oke-fomo, a rapidly developing area of Ilorin, Kwara State, Nigeria was investigated. Seven commercial block industries were randomly selected from where five sandcrete block samples of 450 x 225 x 225mm were sourced. Fine aggregate samples were also obtained from each of these industries and transported to the materials laboratory of Ministry of works, Ilorin. The tests carried out include sieve analysis and compressive strength. The dimension of the blocks was also checked. The mix ratio, curing techniques/duration and batching method were obtained through interaction with the block manufacturers. The results obtained showed that the aggregates are suitable for block making having satisfied the overall grading requirement specified in BS EN 12620 (2002). The mix ratio adopted by the industries ranges from 1:12 to 1:14 which is against the standard 1:6 specified in NIS 87:2004. The compressive strength of the sandcrete blocks was found to be below the Nigerian Industrial Standard (NIS) 87:2004 specification with an overall highest compressive strength of 0.98N/mm2 when compared with the NIS 2.5 and 3.5N/mm2 for non-load and load bearing walls respectively. The study concluded that block producer should adhere strictly to the laid down standard especially in mix ratio and curing duration. However, it was recommended that formal training should be periodically organized for block industries and the public should also be sensitized about the danger in using substandard sandcrete blocks. This will to a large extent improve the production of quality sandcrete blocks and promote the market for the standardized ones while averting consequences associated with weak sandcrete blocks such as collapse of walls.
Assessments and Control of Anthropogenic Noise Pollution in Students’ Residential Areas in Ogbomoso
Authors: Ajayeoba A. O.
Published: September 2021

Increased rate of noise-associated risk factors such as speech interference and reduction in productivity, necessitated that control and regulation measures be put in place, to contain anthropogenic noise pollution in the students’ hostels. Therefore, this study assessed the various anthropogenic sources of noise pollution in students’ hostels and developed a Sound Level Monitor and Control (SLMC) device. 1250 undergraduate students across 5 students’ residential zones were sampled for demographics and investigations were conducted into respondents’ perceived medical history, identification of noise sources, and evaluation of hearing loss. Effects of noise levels were evaluated using 100 respondents’ rooms per zone following standard procedures, considering Sound-System-Only (SSO), Generators-Only (GO), and combination of Sound-System-and-Generator (SSG), loud-conversations, etc., as sources of noise. However, a noise control device incorporated with a circuit breaker was developed. The respondents were 51.2% male and 48.8% female, with 58% in the age range 18 – 27 years. The medical history showed that 1.2 and 6.4% had a hearing problem in short and long times, respectively, while 43.6% affirmed that SSO was a major noise pollution causal factor. SSO, GO, loud conversations, traffic, and grinding machines were identified as the prominent sources of anthropogenic induced noise. The minimum average SL result gave a value of 62.8400dB for both ventilated and unventilated rooms, which is 14% above 55dB threshold value recommended by the National Environmental Standards and Regulations Enforcement Agency. The developed SLMC device gave notification at the SL above 55dB for 15 seconds before disconnecting the sound system if not regulated.
Modification and Performance Evaluation of a Floating Drum Biogas Digester
Authors: Uthman F.
Published: September 2021

Biogas is a renewable source of energy that is obtained from the anaerobic digestion of agricultural residues, animal dung, energy crops, domestic wastes and industrial wastes. These categories of waste that produce biogas are promising sources of energy and the biotechnology process of biofuel is environmentally friendly. This study aimed at modifying, fabricating and evaluating a floating drum digester. The modified floating drum digester consists of the digester tank, gas holder tank, feeding inlet pipe, gas collector outlet, slurry outlet, thermometer and hose. The gas holder tank was inserted into the digester tank while the biogas is generated in the digester tank by pressure. The biogas was produced from the mixture of cattle dung 30 % and 50 % plant wastes. Hence, the organic waste mixed with water in the ratio of 1: 2 for the digestion process. The digestion temperature was recorded daily for a period of 21 days at constant pressure of 1.32 KN/m2 throughout the experiment. The result revealed that the minimum and maximum average temperatures are 25 to 33 oC. This shows that the ambient temperature affects the temperature in the digester and the amount of gas produced is a function of the accumulated temperature in the digester. It was observed that the biogas generated increase as temperature rise. The modified floating drum digester is affordable and it is recommended for small- and large-scale production.
Enhancing the Flexural Strength of Concrete using Recycled Iron and Steel Slag Aggregate
Authors: Raheem A. A
Published: September 2021

Concrete is strong in compression but weak in tension hence, considerable effort is required to improve concrete’s tensile strength by the use of pre-stressed concrete and addition of admixtures or additives. In this study, the use of recycled iron and steel slag (RISS) aggregate to improve the tensile strength of concrete was considered. The paper assessed the mineralogical composition of RISS and granite aggregates, and gradation. It also determines the effects of RISS aggregate on the flexural strength of concrete beams of 150 × 150 × 600 mm containing 0, 10, 20, 40 and 60% RISS aggregate replacement in mix ratios 1:1½:3, 1:2:4 and 1:3:6 with water cement ratios 0.65,0.60 and 0.55 respectively. Diffractograph of RISS and granite aggregate showed that RISS contains Magnetite, Ilmenite and Quartz, while granite contains Quartz, Annite, Microcline and Albite as the predominant minerals. The coefficient of uniformity and concavity of RISS and granite aggregate for maximum aggregate size of 37.5 mm are 4.35 and 1.33; and 4.64 and 1.76 respectively. Both aggregates contain quartz as the predominant mineral and are well graded. The result of the Flexural strength at 28 days curing is within 0.135 – 0.250 MPa specified byBS8500 – 2:2015. Flexural strength of concrete beams cast with RISS aggregate is relatively higher than concrete cast with granite aggregate. Flexural strength, a measure of tensile strength of concrete is improved as percentage RISS aggregate increased.
Subcontracting Strategy in Industrial Projects: Evidence from Saudi Arabia
Authors: Ganiyu A. A.
Published: September 2021

Subcontracting is widely employed in the construction industry owing to the variation of methods, materials, magnitude, and function of the infrastructures. However, the rapport between parties in construction are mostly adversarial and plagued with hitches, which negatively impact construction productivity. This research investigates the problems associated with subcontracting strategies of contractors in industrial projects in the Eastern Province of Saudi Arabia via questionnaire survey. The questionnaire contains a list of thirty-three likely problems affecting subcontracting strategy of contractors organised under the three categories of planning, awarding, and contracting issues. The respondents matched the likely problems with the project value drivers (quality, cost, and time) with which they impact, and rated the magnitude of the problems on project performance. The survey identified incompatibility of the subcontractor/supplier’s time schedule with the project’s time schedule as the topmost problem related to planning issues. Unethical practices is ranked highest among problems related to awarding issues, while incompatibility of subcontracts’ terms and conditions with the main contract’s terms and conditions is rated top among the topmost problems related to contracting issues. The findings revealed that the three problem categories have negative impacts on all the project value drivers in different combinations and are almost equally significant in the view of contractors while making subcontracting decisions. Contractors are therefore advised to critically evaluate the schedule, cost, and quality performance of industrial projects during the planning, awarding, and contracting phase of subcontracting in industrial projects.
Comparative effect of Bambusa vulgaris Schrad. and Gliricidia sepium(Jacq.) charcoal powders on the growth of Parkia biglobosa (Jacq.) Benth seedlings
Authors: Olajiire-Ajayi B. L
Published: September 2021

The high cost of purchasing inorganic fertilizer and its impacts on the soil and the environment remains a major concern in environmental management. Consequently, there is the need to explore other ways to enhance soil fertility. The study investigated the effects of Bambusa vulgaris Schrad. and Gliricidia sepium (Jacq) charcoal powders on the growth of Parkia biglobosa (Jacq). Benth seedlings. The experiment was laid out in a Completely Randomized Design (CRD) with 13 treatments and 9 replicates each. Seeds were sowed directly into polyethene pots while the various treatments were added a week after sowing seeds. Watering was done daily while weeding was done periodically. Growth parameters of seedling height (cm), stem diameter (mm) and leaf count were assessed weekly for 16weeks. Data collected was subjected to Analysis of Variance (ANOVA) at 5% level of significance while the means were separated using Duncan Multiple Range Test (DMRT). The result obtained showed that 15g of Gliricidia sepium charcoal powder + 2kg of topsoil) performed best in height and leaf production with values of 15.85cm and 20.58 respectively.5g of Bambusa vulgaris charcoal powder + 2kg of topsoil) performed best with the value of 0.41mm for stem diameter.2kg of topsoil had the least performance for all parameter assessed. The ANOVA result showed that there was significant difference at P>0.5 among the treatments at 5% level of probability in terms of plant height, stem diameter, leaf production. The study concludes that the addition of charcoalas soil additive enhanced growth of Parkia biglobosa seedling at nursery stage.
Translation: Covid-19, new technologies, productivity and business' emergency plan
Authors: Morales Milagros
Published: September 2021

The Covid -19 outbreak caused great uncertainty in whole companies' sectors and levels. In general, companies have been forced to make changes and adjustments to adapt to new needs. This research aims to provide managers and business directors some tools to reduce risks in decision-making and minimize economic and health losses in employees. By implementing emergency plans, risk management, creating trust, and effective communication between the different organization levels and areas. The research is inserted in the critical theory paradigm, an epistemological approach, a qualitative methodological perspective, and an evaluation and action research method. The theoretical foundation is based on the thinking of Armand V. Feigenbaum as a precursor of Total Quality Management (TQM) and project management to mitigate risks and emergencies. Finally, a set of reflections, evaluations, and proposals are showed as a conclusion to facilitate decision-making and companies' adaptability in crisis environments.
Corruption Prevention through Community Organizing:
Authors: Sakib Nurul Huda
Published: September 2021

Engaging citizens through a community-based organisation is not a newphenomenon. Research around the world has shown that citizenengagement is one of the most significant ways of combating corruption and promoting good governance. Transparency International Bangladesh (TIB) is undertaking similar types of activities through the Committee of Concerned Citizens (CCCs) and Youth Engagement and Support (YES) Groups. The question is, how much difference is it making in society vis-à-vis preventing corruption? Considering TIB as a case study drawing in-depth interviews, participation observation and document analysis, this paper has found that both CCCs and YES activities are dominated by coercive and mimetic isomorphism to prevent corruption. Second, TIB has managed to create awareness through engaging citizens, the whole process as a ‘tortoise movement.' This suggests that the movement against the corruption of these groups is prolonged and time-consuming, and more importantly, it does not make ‘direct impact’ on service delivery. Third, it also suggests that donor-driven ‘isomorphic’ approach may prove to be less effective, considering the societal context of Bangladesh. Finally, this paper also identified some loopholes that are mainly linked with the ‘tortoise movement.
Where will our children go? A Study on the Impact of Children’s Day Care Services on Working Parents
Authors: Tonmoy Md. Shhariar Bulbul , Islam Kazi Rabiul
Published: September 2021

Working parents in Bangladesh are facing tremendous challenges to be self-dependent both socially and economically in addition to raise and to educate their children in a sound and secure way. Regarding the issue, caring for the children has been appeared as a vital social demand due to the increasing number of working parent’s attachments to a variety of economic and social activities which displays timely Day Care service requirements. To find out the present condition of the daycare centres in Bangladesh and to know the impact of daycare centres on working parents in Dhaka city, a research has been carried out in Dhaka city based on qualitative data. In this rigorous process, data has been gathered from 30 respondents, which includes working parents who have babies, experts, owners of Day Care service centre, and staff. The study found that almost all the respondents are satisfied with the services are providing by the private sector's daycare centres and the working parents who keep their babies in Daycare service centre, they can continue their work and job unworriedly by keeping their babies in Day Care Centres. Both father and mother are contributing to their family, their standard of living is increasing, and economically working parents are getting solvent. Findings revealed that the enhancement of working parents creates the demand of healthy daycare centres exponentially. The endorsement has been made to augment the services provided by these daycare centres with the aid of proper amenities. Lastly, these types of services can play a significant role in promoting a suitable, healthy, and secure childhood environment for our children, and even it can be the essential stakeholder of Sustainable Development if it is flourished and patronized properly.
Capacity Building of Bangladesh Army Corps of Engineers in Nation Building Projects:
Authors: Hossain Gazi Mosharrof
Published: September 2021

Bangladesh Army Corps of Engineers contributes to various nation-building projects of Bangladesh where Engineering Construction Battalions (ECBs) play the lead role. Besides performing its regular job, ECBs at present day are greatly involved in various complex projects which put additional pressure on their existing capacity. Keeping this in mind, the major objective of this study is to analyze the contribution of ECBs in nation-building projects with their existing workforce and equipment . The key research objective of this paper is to show how capacity building of Bangladesh Army Corps of Engineers can enable them to contribute more in nation-building projects.  This study is based on content analysis of mostly secondary material. To substantiate this, a small quantity of Interviews, Focus Group Discussions and Case Study were also carried out.  The findings identified that ECBs are not self-sufficient enough to implement any nation-building projects without subcontracting with their existing manpower and equipment. Due to the simultaneous involvement of ECBs in regular as well as diversified nation-building projects, capacity building of ECBs is often overlooked which does not enable them to equip for future projects and higher requirements in the construction sector. Based on the findings of the research,  it was  recommended that ECBs may arrange regular capacity building  for their personnel to equip them well.
Reviving Opportunities through Socio-Spatial Parameters for Community Interaction:
Authors: Suchana Sarah Bashneen , Soud Sheikh Itmam
Published: September 2021

Within urbanized areas, the importance of neighborhood ponds should be assessed and investigated with its socio-spatial parameters (access and linkage, sociability, uses and activities, comfort and image etc) since such water bodies act as retention basin during floods, reservoir for lean period and responsive socializing agent to measure community interaction which are generally been neglected by city government, threatened by developers but taken care by neighborhood people in Old Dhaka. Most of the inner city small neighborhoods ponds have been encroached and filled up upon demand on land as the pond were not integrated in the city planning. The main objective of this research is to assess the significance of such water bodies and revive the spatial relationship of neighborhood ponds with its nearby residents. Therefore a socio-environmental survey (quantitative and qualitative) is held on neglected and threatened small neighborhood ponds of Old Dhaka with direct observation, in-depth interviews of the residents to compare the environmental, ecological and social contexts and explore the opportunities. An integrated assessment for enhancing sustainability and creating opportunities through community participation has been suggested to rejuvenate the ponds with attention for wetland preservation and to integrate into community development programs or planning.
To the procedure of confirmation of the laboratory’s competence in performing mutagenicity assessment using the Ames test
Authors: Egorova Olga V.
Published: September 2021

Introduction. The test for the induction of reverse gene mutations (Ames test, OECD* guideline No. 471) is one of the most popular methods for assessing mutagenicity due to its ease of execution and the ability to detect up to 70-80% of substances with carcinogenic activity. The experimental protocol requires a minimum amount of test substance and standard microbiological laboratory equipment. To obtain the primary data, several days from the start of the experiment are required. Despite the existence of publications devoted to the detailed description of the standard Ames test protocol, there is a gap affecting a number of aspects of the procedure for confirming the competence of a testing center using this method in its practice. Materials and methods. When preparing this article, we used the literature data published in domestic and foreign literature over the past 20 years concerning experimental approaches to the implementation of the Ames test. The literature search was carried out in the Scopus, Medline, Google Scholar, RSCI databases. Results. In the FBES “Federal Scientific Center of Hygiene named after F.F. Erisman” of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing the method for assessing the bacterial reverse mutation has found application in assessing the safety of technical products of pesticides, their mixtures and preparative forms, as well as in the examination of equivalence. Testing laboratory center on the basis of the FBES “Federal Scientific Center of Hygiene named after F.F. Erisman” of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing is accredited for compliance with the state standard GOST ISO / IEC 17025-2019 ”General requirements for the competence of testing and calibration laboratories.“ In this article, based on new published data and our own practical experience, a number of necessary conditions are considered for demonstrating the competence of a testing laboratory using the test for the induction of reverse gene mutations in its practice, its ability to obtain reliable results and take actions to manage the risks of laboratory activities. The main attention is paid to ensuring such parameters of the test quality as indicator cultures, metabolic activation system, control of the background of spontaneous mutation, etc. Conclusion. The discussed practical issues can be useful for specialists from research laboratories planning to introduce this method into practice.
Mapeamento de Produções brasileiras de Teses e Dissertações sobre o uso da Modelagem na Educação Básica.
Authors: Oliveira Jefferson Dantas , Madruga Zulma Elizabete de Freitas , Gallon Monica
Published: September 2021

Este artigo apresenta resultados de uma pesquisa que tem como objetivo investigar como se apresenta nas pesquisas acadêmicas brasileiras o uso da Modelagem para o ensino e a aprendizagem da Matemática na Educação Básica. Como abordagem metodológica, utilizou-se os procedimentos do Mapeamento na Pesquisa Educacional. Os dados foram constituídos a partir da seleção de oito pesquisas publicadas em dois bancos de dados. Para a análise, estabeleceram-se inicialmente quatro categorias: a) contexto da pesquisa/objetivo; b) referenciais teóricos da pesquisa; c) procedimentos metodológicos; d) principais resultados. O estudo permitiu identificar a relevância da utilização de métodos como a MM no ensino e na aprendizagem da Modelagem na Educação Básica. Verificou-se ainda que a utilização desse método permite que os estudantes sintam-se mais interessados na aprendizagem dos conteúdos abordados na disciplina.
Situações da Vida Cotidiana no Ensino de Frações
Authors: BERTINI LUCIANE
Published: September 2021

O presente texto tem o objetivo de apresentar uma discussão sobre os saberes mobilizados no ensino de frações a partir de situações da vida cotidiana em livros didáticos do início do século XX. Foram analisados livros didáticos representativos de uma aritmética intuitiva e de uma aritmética sob medida, discutidos respectivamente por Oliveira (2017) e Pinheiro (2017). Como resultado, observam-se semelhanças nas propostas para o ensino das frações ordinárias: inicia-se pela ideia de fração como representativa de objeto dividido em partes iguais e, posteriormente, cálculos de fração de uma quantidade. Diferenças foram observadas no que diz respeito à sequência de apresentação dos conteúdos: em tempos de uma aritmética intuitiva propõe-se que o ensino das frações decimais ocorra depois das ordinárias; oposto ao observado na obra representativa de uma aritmética sob medida. Destaca-se, ainda, que o uso de situações da vida diária pode ter reflexo no próprio entendimento do conceito de fração.
Sistem Pakar dalam Membandingkan Metode Forward Chaining dengan Certainty Factor untuk Mengidentifikasi Jenis Kulit Wajah
Authors: Rahmi Nadya Alinda , Nurcahyo Gunadi Widi
Published: September 2021

Skin is one piece of the body that has adaptable properties to shield the human body from natural effects. A great many people need facial skin that is tight and liberated from skin illnesses, particularly skin inflammation inclined skin. Next, everybody ought to do facial consideration and utilize a few fixings that are appropriate for facial skin, there are five kinds of ordinary skin, sleek skin, dry skin, blend skin and touchy skin. To inspect the kind of facial skin by contrasting the Forward Chaining and Certainty Factor procedures. This assessment utilizes 30 information acquired from interviews with subject matter experts. There are a few signs acquired from different issues distinguished on facial skin which are utilized as indication data for facial skin types constrained by subject matter experts. This data is utilized to check the sort of facial skin dependent on guidelines and data from a trained professional. The preliminary advances taken are to look at the Forward Chaining and Certainty Factor strategies. The outcomes acquired subsequent to testing and assessment of the Forward Chaining and Certainty Factor strategies were 83.33% and the discoveries expressed that the customer had a commonplace skin type. The test outcomes can be seen from the two strategies that test unequivocal facial skin types, then, at that point the principle system utilized not set in stone to help dermatologists in analyzing facial skin types.
GENDER APPROACH TO THE ORGANIZATION OF PEDAGOGICAL INTERACTION IN AN INTERNATIONALLY ORIENTED UNIVERSITY
Authors:   RUDN University, Kunovski M.N. , Pomortseva N.V.
Published: September 2021

The growing popularity of the Russian higher education in the world and the growing number of foreign students in the universities of Russia arouse interest to the issues of interethnic interaction and adaptation to the academic environment of an internationally oriented university. The article is devoted to the problem of higher education enhancing in the modern multinational academic environment of Russian internationally oriented universities. The purpose of the study is to analyze the gender specificity of the interethnic relations between the representatives of different ethnic groups in the process of pedagogical interaction in the Russian-speaking educational environment of an internationally-oriented university. The study reveals how gender stereotypes of a student and a teacher are determined by the national culture with its inherent traditional structure of gender roles.There was conducted a survey among the foreign students of the pre-university and other faculties of RUDN University. 98 students from China, 46 students from Iran, 10 students from Azerbaijan, 18 students from Afghanistan, 25 students from Vietnam, 18 students from Lebanon, 21 students from Mongolia, 33 students from Turkmenistan, 15 students from Uzbekistan and 18 students from Ecuador (a total of 348 foreign students) took part in the survey. Having analyzed the answers of the respondents, the authors made the conclusion about the influence of gender on the interethnic relations in an internationally oriented university, in particular, in the pedagogical interaction process in multiethnic groups. On the basis of the data presented, the authors prove the presence of ethnocultural features of gender and the importance of taking them into account for harmonizing interethnic interaction and the educational process enhancing
NO DEATH, OR EX TENEBRIS LUX: APOTHATIC TRADITION IN APOLLON MAYKOV’S WORKS
Authors:   Peoples' friendship University of Russia, Dudareva M.A. , Nikitina V.V.
Published: September 2021

The research object is an apothaticism as a phenomenon of global art culture. The research subject is an apothatic tradition related to the collision between the day and evening light, images-codes “darkness” and “light”. The research material is based on the poetry by Apollon Maykov, and this year it would be 200 years since his birth. A hermeneutic reconstruction applies to the ethos of life and death, a mythologeme of timelessness in the later poetry of the poet, representing the direction of “pure art” in the literature of the 19th century. Much attention is paid to the poem “Ex tenebris lux”, written ten years before the poet’s death. The research methodology is reduced to a holistic ontohermeneutic analysis aimed at highlighting the apophatic paradigm of this text. Parallels are drawn with Persian poetry, the Sufi tradition, in which black color is significant in its ambivalent expression. In Maykov’s works, black color is associated with the threshold state of a speaker and the way out of liminality. The authors also touch upon Russian folklore, aesthetics and poetics of a fairy tale, in which the “three kingdoms” plot is important in this case. The research results are valuable from the cultural-philosophical positions of understanding the apophaticism of the artistic space of culture, but they can also be used in teaching courses on Russian literature of the 19th century and philosophy.
Finite-time Stochastic Stability and Stabilization for Uncertain Discrete-time Stochastic Systems with Time-varying Delay
Authors: Tang Xinyue , Dong Yali , Liu Meng
Published: September 2021

This paper deals with the problems of finite-time stochastic stability and stabilization for discrete-time stochastic systems with parametric uncertainties and time-varying delay. Using the Lyapunov-Krasovskii functional method, some sufficient conditions of finite-time stochastic stability for a class of discrete-time stochastic uncertain systems are established in term of matrix inequalities. Then, a new criterion is proposed to ensure the closed-loop system is finite-time stochastically stable. The controller gain is designed. Finally, two numerical examples are given to illustrate the effectiveness of the proposed results.
Weighted Maximum Likelihood Correlation Coefficient to Handle Missing Values and Outliers in Data Set
Authors: Sinsomboonthong Juthaphorn , Sinsomboonthong Saichon
Published: September 2021

The proposed estimator, namely weighted maximum likelihood (WML) correlation coefficient, for measuring the relationship between two variables to concern about missing values and outliers in the dataset is presented. This estimator is proven by applying the conditional probability function to take care of some missing values and pay more attention to values near the center. However, outliers in the dataset are assigned a slight weight. These using techniques will give the robust proposed method when the preliminary assumptions are not met data analysis. To inspect about the quality of the proposed estimator, the six methods—WML, Pearson, median, percentage bend, biweight mid, and composite correlation coefficients—are compared the properties in two criteria, i.e. the bias and mean squared error, via the simulation study. The results of generated data are illustrated that the WML estimator seems to have the best performance to withstand the missing values and outliers in dataset, especially for the tiny sample size and large percentage of outliers regardless of missing data levels. However, for the massive sample size, the median correlation coefficient seems to have the good estimator when linear relationship levels between two variables are approximately over 0.4 irrespective of outliers and missing data levels
CIRCULAR DOUBLE SKIN STAINLESS STEEL TUBULAR COLUMN FILLED WITH UHPFRC SUBJECTED TO IMPACT LOAD
Authors: ABDEL NASER ABDEL RAHIM KHALID
Published: September 2021

Concrete filled steel tube (CFST) column is an important type of structural member and its protective design is essential to enhance its structural performance under various dynamic loads. Previously carried out studies on CFST columns tried to determine how to improve their structural response under various loadings, such as axial compression, lateral impact, blast, seismic, etc. Apart from investigations on transverse impact loading, the majority of the other studies on CFST under various loads established solutions and protective measures. Therefore, this study aim is to improve the performance of CFST under transverse impact loads. The geometrical and mechanical properties, boundary conditions, impact loading and dynamic explicit analysis employed in that study. This paper proposes a novel design in terms of cross-sectional configuration and smart materials to be applied on the CFST in order to improve its performance under lateral impact loading. The proposed investigation is exclusively numerical and its results were verified with the experimental results from literature. The considered three main variables were including (1) concrete-filled double skin steel tubular – CFDST with both first sandwich layer and internal carbon steel tube filled with normal strength concrete – NSC, (2) CFDST with first sandwich layer filled with Ultra High-Performance Fiber-Reinforced Concrete – UHPFRC. a. The parameters including failure modes, maximum mid-span deflection, and residual displacements were presented.
North Carolina Books
Authors: Jones, Jr. Plummer Alston
Published: September 2021

North Carolina Books
Wired to the World: History Makers
Authors: Scott Ralph L
Published: September 2021

History Makers is the largest video oral history collection of African-American individuals on the web.
From the Pen of the Editor: Libraries 2.3
Authors: Scott Ralph L
Published: September 2021

Editorial for 2021 issue
Multifactorial management of psoriasis and its comorbidities
Authors:   Disciplina de Dermatologie, Universitatea de Medicină și Farmacie „Carol Davila“, București, STĂNESCU Ana Maria Alexandra , MATEI Alexandru ,   Departamentul de Obstetrică-Ginecologie, Universitatea de Medicină și Farmacie „Carol Davila“, București, GRĂJDEANU Ioana Veronica ,   Disciplina de Medicină de Familie, Universitatea de Medicină și Farmacie „Carol Davila“, București, APPIAH Ekua Asafoaba ,   Universitatea de Medicină și Farmacie „Carol Davila“, București, GIURCĂNEANU Călin ,   Universitatea de Medicină și Farmacie „Carol Davila“, București
Published: September 2021

Psoriasis is more than a dermatological condition, it is a chronic inflammatory disease which predominantly affects skin but the joints can also be involved. This disease has a significant impact on the day to day life of the patients, their psychological wellbeing and significantly increases the risk developing metabolic syndrome. Metabolic syndrome is diagnosed by considering certain factors; waist circumference, serum triglycerides, HDL cholesterol, blood pressure and blood glucose levels. Considering the gravity of impact on the quality of life of individuals with psoriasis and its comorbidities, the therapeutic strategy must be precise and most often require a multidisciplinary team.
Theoretical and clinical aspects regarding identification of musculoskeletal problems in dental professional work
Authors:   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, BURCEA Claudia Camelia , MALIŢA Mădălina ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, PERIEANU Mădălina ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, TEMELCEA Anca ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, GRIGORESCU Ioana ,   Facultatea de Medicină, Universitatea „Dunărea de Jos“, Galaţi, EFTENE Oana ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, PERIEANU Viorel ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, IONESCU Camelia ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, BURLIBAŞA Liliana ,   Facultatea de Biologie, Universitatea din Bucureşti, BURLIBAŞA Mihai ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti
Published: September 2021

Objective. The purpose of the study is to identify the musculoskeletal problems in dental professionals and the causes leading to them to rank. The most frequent ones were ranked in order to elaborate operational and global projects and differentiated treatment and prophylaxis units focused on that certain problem. Material and method. The 133 subjects (dental students and specialist) answered a 14 items questionnaire. Results. The results of the questionnaire were centralized and statistically analyzed using descriptive statistics. Discussions. The results showed that most of the subjects (69.92%) had growth problems. 90.23% of them did not consulted a kinetoterapist but they were aware of the necessity of seeking specialty treatment in the future. Conclusions. The present study conducted to preliminary conclusions that will be the start point of further extended studies, emphasizing the necessity of Kinetotherapy classes in Dental School.
Left hemilaryngeal carcinoma complicated with an external laryngocele
Authors:   Spitalul Colţea, Bucureşti, SIMIONIUC Anca , ANGHEL Alina Georgiana ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, DUMITRU Mihai ,   Spitalul Colţea, Bucureşti, ANGHEL Oana Adriana ,   Spitalul Colţea, Bucureşti, ANGHEL Ion ,   Clinica ORL, Spitalul „Sfânta Maria“, Bucureşti
Published: September 2021

Laryngocele represents an abnormal invagination of the mucous membrane from the Morgagni laryngeal ventricle, being filled with air and communicating with the laryngeal inlet. The symptoms are intermittent, with recurrent episodes of dysphonia and airway insufficiency. Exceptionally, the wall of the cyst could become malignant. This case was reported given the association between laryngeal carcinoma and external laryngocele.
Tumor markers in heart failure
Authors:   “Carol Davila” University of Medicine and Pharmacy, Buchares, BACALBASA Nicolae , GIREADA Alexandra ,   “Carol Davila” Central Military Emergency Hospital, Bucharest, BALESCU Irina ,   “Ponderas” Hospital, Bucharest, BALALAU Cristian ,   “Sf. Pantelimon” Emergency Hospital, Bucharest, DIMITRIU Mihai ,   “Carol Davila” University of Medicine and Pharmacy, Buchares
Published: September 2021

It has been widely demonstrated that patients diagnosed with chronic heart failure present high levels of circulating neurohormones and inflammation markers which can secondarily induce an increase of the level of tumor markers such as CA 125, AFP, CEA, CA 15.3 or CA 19-9. This is a literature review regarding the benefits of determination of tumor markers serum levels in cases presenting chronic heart failure.
Upper extremity deep venous thrombosis: risk factors, diagnosis, treatment
Authors:   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti, DIACONU Camelia C. ,   Clinica de Medicină Internă, Spitalul Clinic de Urgenţă Floreasca, Bucureşti, ILIE Mădălina ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti,   Clinica de Medicină Internă, Spitalul Clinic de Urgenţă Floreasca, Bucureşti, IANCU Mihaela Adela ,   Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti,   Disciplina Medicină de Familie, Universitatea de Medicină şi Farmacie „Carol Davila“, Bucureşti
Published: September 2021

Upper extremity deep venous thrombosis is a condition with increasing prevalence, with high risk of morbidity and mortality, due to embolic complications. In the majority of the cases, thrombosis involves more than one venous segment, most frequently being affected the subclavian vein, followed by internal jugular vein, brachiocephalic vein and basilic vein. Upper extremity deep venous thrombosis in patients without risk factors for thrombosis is called primary deep venous thrombosis and includes idiopathic thrombosis and effort thrombosis. Deep venous thrombosis of upper extremity is called secondary when there are known risk factors and it is encountered mainly in older patients, with many comorbidities. The positive diagnosis is established only after paraclinical and imaging investigations, ultrasonography being the most useful diagnostic method. The most important complication, with high risk of death, is pulmonary embolism. Treatment consists in anticoagulant therapy, for preventing thrombosis extension and pulmonary embolism.