bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH MOTIVASI BELAJAR DAN TINGKAT KEPERCAYAAN DIRI TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS VIII SMPN 1 NAPABALANO
Authors: Paputungan Wulansari Mauna , Awaludin Awaludin , Salam Mohamad
Published: February 2022

Penelitian ini bertujuan untuk mengkaji pengaruh motivasi belajar dan tingkat kepercayaan diri terhadap hasil belajar matematika siswa kelas VIII SMPN 1 Napabalano.Populasi penelitian ini adalah siswa kelas VIII SMPN 1 Napabalano tahun ajaran 2019/2020 berjumlah 206 orang.Penentuan sampel berdasarkan teknik proportional random sampling sebesar 60% dari tiap-tiap kelas paralel dan diperoleh sampel sebanyak 122 siswa.Prosedur pengumpulan data dalam penelitian ini menggunakan angket untuk memperoleh data motivasi belajar dan tingkat kepercayaan diri dan nilai ulangan semester genap untuk memperoleh data hasil belajar siswa. Hasil penelitian ini menunjukkan bahwa ada pengaruh motivasi belajar dan tingkat kepercayaan diri terhadap hasil belajar matematika siswa kelas VIII SMP Negeri 1 Napabalano yang ditunjukkan dengan persamaan regresi  17,886 + 0,679X1 + 0,034X2 koefisien determinasi (R2) sebesar 0,361, atau sebesar 36,1%. Hal ini menunjukkan bahwa motivasi belajar dan tingkat kepercayaan diri memberikan kontribusi dan dukungan yang baik dalam usaha meningkatkan hasil belajar siswa.
EFEKTIVITAS PENDEKATAN PEMECAHAN POLYA TERHADAP KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA SISWA KELAS XI SMA NEGERI 1 KONTUNAGA
Authors: Sarniati Wa Ode , Zamsir Zamsir , Jazuli Laode Ahmad
Published: February 2022

Penelitian ini merupakan penelitian eksperimen dengan rancangan One-Group Pretest-Posttest Design. Penelitian ini bertujuan untuk melihat efektivitas pendekatan pemecahan Polya dalam meningkatkan kemampuan pemecahan masalah matematika siswa. Populasi dalam penelitian ini adalah seluruh siswa kelas XI.IPA SMA Negeri 1 Kontunaga yang terdiri dari tiga kelas paralel. Teknik pengambilan sampel menggunakan teknik simple random sampling. Dari cara tersebut, dipilih satu kelas sebagai sampel, yakni kelas XI IPA3 sebagai kelas eksperimen. Teknik pengumpulan data dalam penelitian ini dilakukan dengan pemberian instrumen penelitian berupa lembar observasi dan intrumen tes kemampuan pemecahan masalah matematika siswa berbentuk tes uraian. Teknik analisis data mengunakan analisis statistik deskriptif dan analisis inferensial. Berdasarkan analisis data diperoleh kesimpulan bahwa pendekatan pemecahan Polya efektif digunakan dalam meningkatkan kemampuan pemecahan masalah matematika siswa. Hal ini ditunjukkan pada jumlah siswa yang mendapatkan nilai  kemampuan pemecahan masalah matematika siswa berada pada kategori sedang hingga tinggi yaitu mencapai 75%.
ANALISIS KEMAMPUAN KOMUNIKASI MATEMATIS SISWA KELAS VIII SMP NEGERI 1 DURUKA
Authors: Latief Wahyuni , Jafar Jafar
Published: February 2022

Penelitian ini bertujuan untuk menganalisis kemampuan komunikasi matematis siswa di SMP Negeri 1 Duruka menggunakan metode eksploratif dengan pendekatan kualitatif. Berdasarkan hasil penelitian diketahui bahwa (1) siswa berkemampuan tinggi  memiliki kemampuan komunikasi yang sangat baik karena memiliki 3 (semua) tahapan/indikator kemampuan komunikasi matematis yaitu indikator menghubungkan benda nyata, gambar dan diagram ke dalam ide matematika, menyatakan peristiwa sehari-hari dalam bahasa atau simbol matematika dan menjelaskan ide, situasi dan relasi matematika secara lisan atau tulisan dengan benda nyata, gambar atau bentuk aljabar (2) siswa berkemampuan sedang memiliki kemampuan komunikasi yang cukup baik karena memiliki 2 tahapan/indikator kemampuan komunikasi matematis yaitu indikator menghubungkan benda nyata, gambar dan diagram ke dalam ide matematika, menyatakan peristiwa sehari-hari dalam bahasa atau simbol matematika (3) siswa berkemampuan rendah memiliki kemampuan komunikasi yang kurang baik karena memiliki 1 tahapan/indikator kemampuan komunikasi matematis yaitu indikator menghubungkan benda nyata, gambar dan diagram ke dalam ide matematika.
THE PUNONG BARANGAY IN SOUTHERN NUEVA VIZCAYA: THEIR LEADERSHIP BEHAVIOR AND COMPETENCIES
Authors: Arcadia Alice T. Ordoñez
Published: February 2022

The Punong Barangay are agents of development in the national government and they play a vital role in the development and progress of our country through a strong barangay local government. The study conducted used the descriptive approach and utilized a validated survey instrument on leadership behavior and competencies. The cluster random sampling using the proportional allocation was utilized to gather data from 234 samples. The data analysis showed that the respondents were predominantly male, married, about 45 years old, high school graduates, with low annual income and with 5-9 dependents. Their leadership behavior and competencies were found as very satisfactory. There was no significant relationship between leadership behavior and profile variables. The study will serve as benchmarking reference to further improve punong barangays’ leadership behavior and competencies for good local governance.
KEYWORDS: Punong Barangay, leadership behavior, and competencies
Global Perspectives on Teacher Professional Development: Navigating the Pandemic
Authors: WEST Justin , BAUTISTA Alfredo
Published: February 2022

Abstract
Educational researchers, policymakers, and administrators agree that providing in-service teachers with high-quality professional development (PD) opportunities is essential to educational success. Despite the substantial sums invested in teacher PD by countries and jurisdictions, the COVID-19 pandemic has caused serious challenges to teacher learning around the world. As conventional face-to-face initiatives became impracticable (e.g., workshops, conferences, school-based PD) and the need to prioritize pandemic-specific topics intensified (e.g., emergency remote teaching), teacher PD was recast both formally (where and how teachers engaged in PD) and substantively (what teachers sought to learn from PD). Amidst the international upheavals caused by COVID-19, how have teacher PD infrastructures (policies, practices, theories) responded? For this Special Issue, we put this and other questions before a panel of PD scholars in six contexts: United States, Scotland (United Kingdom), Uruguay, Australia, United Arab Emirates, and Hong Kong (SAR China). In their respective contributions, authors discuss issues such as the limitations of PD systems based on compliance and external accountability mechanisms, the need to center teacher motivation in existing PD frameworks, matters of access and equity, the importance of developing technological infrastructures for online and hybrid learning, problems of online safety and wellbeing, and more. The Special Issue shows that the uncertainty of today’s times requires new, global perspectives on PD design, implementation, evaluation, theory, and scholarship. To nurture agentic, highly motivated, and effective teachers for the pandemic era and beyond, countries and jurisdictions should think more creatively about how to best support teacher learning.

Keywords: Teacher professional development, in-service teachers, COVID-19, comparative education
Teacher Professional Development in Hong Kong: Describing the Current Infrastructure
Authors: BAUTISTA Alfredo , HO Yan Lam , FAN Thomas , YEUNG Jerry , BRYANT Darren
Published: February 2022

Abstract
This article describes the current teacher professional development (PD) infrastructure of Hong Kong, one of the world’s top performers in education. Drawing on contemporary policy frameworks, institutional websites, and research literature, we outline how teachers from primary and secondary local schools are supported to enhance their professional capacity. After introducing the structure of the Hong Kong education system, we describe pre-service teacher education and the Professional Ladder framework, designed by the Education Bureau (EDB) to regulate in-service PD. We then describe the work done by the leading PD providers and the PD-related obstacles, difficulties, and constraints reported in the literature. The article shows that Hong Kong has developed a solid PD infrastructure with hybrid characteristics. While the system is based on compliance and external accountability mechanisms, teachers are encouraged to design their PD journeys based on their interests, needs, and career aspirations. Every three years, teachers are required to complete 90 to 150 hours of PD (depending on seniority), including core and elective training (approximately 1/3 and 2/3 of the PD allotment, respectively). Structured, on-the-job, project-based, whole-school, and individual PD activities are available. The article also describes the strategies recently adopted to tackle the challenges of COVID-19. We conclude that Hong Kong has made great efforts to design a high-quality PD infrastructure within a hierarchical educational system, in which quantity of provision and content coverage have been prioritized over teacher agency and autonomy. More research is required to investigate the actual impact of PD on teachers’ practices and students’ learning.

Keywords: Teacher Professional Development, continuing education, system analysis, educational policy, effective professional development, Hong Kong
Mapping the Evolving Teacher Professional Development Landscape in the United Arab Emirates
Authors: Garces-Bacsal Rhoda Myra , Alhosani Najwa , Elhoweris Hala , Takriti Rachel , Schofield Lindsay , Stylianides Georgios , Alhosani Mohamed , Mohamed Ahmed , Almuhairy Osha
Published: February 2022

Abstract
One of the goals of the United Arab Emirates (UAE) is to be the centre of excellence in both education and research in the Middle East. Radical educational reforms have been introduced with substantial governmental support provided to ensure that the essential standards of quality are met in terms of teacher professional development (TPD) as the country transitions to a knowledge-based economy. Given UAE’s unique demographic landscape, it is of great interest to map the evolving TPD landscape in the country from its historical beginnings to the current initiatives being done and future initiatives being conceptualized in government and private schools. The paper focuses on TPD in the following areas: early childhood, special education, educational leadership, health and physical education. The resulting shifts in the UAE educational landscape as a function of the pandemic across these specific disciplines are discussed. The impact on field experiences among preservice teachers and the continuous professional development opportunities for in-service teachers are further explored. Moreover, the authors will touch on some best practices and challenges in providing TPD in the UAE, in light of stringent quality assurance systems in teacher education. It is argued that there is a lack of centralization by way of a cohesive framework that effectively structures the implementation of a TPD model that is aligned and customized to the needs of its stakeholders. This provides a unique opportunity for educators to chart their own roadmap and collectively define the evolving educational landscape.

Keywords: teacher professional development in UAE, teacher training in the UAE
In-Service Teacher Professional Learning in Australia: Lessons Learnt from COVID-19
Authors: Maher Damian
Published: February 2022

Abstract:
Professional Learning (PL) for Australian teachers is a crucial and integral aspect of their practice and is mandated under Australian legislation. This article briefly describes PL in Australia and outlines the importance of teacher PL, setting out ways it can be undertaken in different jurisdictions around Australia. The focus then moves to a discussion on ways in which PL was impacted during 2020-2021 as a result of COVID-19. In particular, online PL is examined indicating that, for teachers in Australia, the move to online teaching and PL was sudden and was something teachers were not prepared for. Possible futures are explored with potential changes to the implementation of PL, incorporating online and face-to-face modes. Aspects of formal and informal learning are considered accordingly. In focusing on informal learning, the way that social media supported PL during COVID-19 is examined. The potential changing focus of PL as a result of COVID-19 is investigated with a focus on online safety, wellbeing (which includes suicide), and hybrid learning. The discussion on wellbeing indicates a need for increased teacher PL, with increased student concerns being reported as a result of COVID-19. Much of the content is viewed through an Australian lens, although this was not always possible given a scarcity of Australian research in some areas.

Keywords: Professional learning, COVID-19, wellbeing, online safety, Australia
Neoliberalismo y masculinidad en Nostalgia de la Sombra, de Eduardo Antonio Parra
Authors: Luévano Sabino
Published: February 2022

Este artículo tiene como objetivo estudiar la representación de la masculinidad en la novela Nostalgia de la sombra (2002), de Eduardo Antonio Parra. A partir del diálogo con teorías de masculinidad, neoliberalismo, vulnerabilidad y estudios culturales latinoamericanos contemporáneos, este artículo analiza la manera cómo el protagonista de Nostalgia se inserta en un imaginario cultural específico y en diferentes discursos sociales sobre lo que significa ser hombre en México. En el contexto actual de violencia que vive el país, este análisis busca señalar las lógicas de poder que trajo la imposición del neoliberalismo y cómo es que hacen posibles diferentes fenómenos de necroempoderamiento masculino.
La crítica(,) obra en el mundo: notas sobre crítica literaria
Authors: Galván Díaz F. J.
Published: February 2022

Desde hace algunos años, la crítica literaria latinoamericana —por no decir las humanidades—, en general y mexicana en particular, sufre un estancamiento en tres sentidos: primero, la aparente afrenta de los estudios culturales condujo a algunos académicos a replegar sus propuestas a aspectos formales; segundo, existe una restricción de circulación de los materiales, producidos por los eruditos, a circuitos universitarios; finalmente, hay colegas que mantienen la idea de que la crítica es la comprobación de la teoría, modelo que enseñan, sobre todo, en el nivel de licenciatura. Este ensayo —mediante una revisión de los trabajos de Doris Sommer— vuelve a tales situaciones con el fin de proponer una crítica que se reconozca como «artificio»: la investigación que identifica al placer como su punto de partida facilita la reivindicación del pensamiento crítico que se expande a propósito de una obra literaria. Así, la labor del crítico reconoce su incidencia en procesos sociales y epistémicos, se torna mundana y regresa al sitio que le dio origen.
Porosidad, masculinidades y lugares en El libro vacío, de Josefina Vicens
Authors: Rivera Guerrero Marta D.
Published: February 2022

En el presente artículo, analizo la masculinidad del protagonista de El libro vacío de Josefina Vicens (1958), José García, y su relación con la espacialidad diegética para mostrar cómo la porosidad que hay entre los lugares de la novela permite que el personaje observe y cuestione su performatividad como hombre. Se trata de un trabajo de crítica literaria en diálogo con disciplinas de las ciencias sociales y los estudios de género. En este señalo cómo García, por un lado, al encontrarse en distintos contextos, diversifica su performatividad con tal de mantener una masculinidad hegemónica; mientras que, por otro lado, logra problematizar su reacción ante las exigencias de una sociedad heteropatriarcal, pues la porosidad que se concentra en su habitación facilita la confrontación entre sus experiencias, sus acciones y sus pensamientos, y culmina en el énfasis de sus contradicciones. De esta manera, encuentro que la identidad de García como hombre puede, en ocasiones, cobrar autonomía como resultado de su introspección ante los lugares que se intersectan y encuentran en la habitación.
Exploring the Role of Elementary Teachers’ TPACK in the Adoption of 1:1 Computing Across Subject areas
Authors: Musgrove Ann , Powers Jillian , Nichols Bryan , Lapp Susanne
Published: February 2022

This study examines the role that technological pedagogical content knowledge (TPACK) plays in elementary teachers' adoption of 1:1 computing for instruction across the subject areas of mathematics, science, English language arts, and social studies. In particular, the research explored whether teachers' self-reported TPACK moderated the relationship between teachers' perceived ease of use (PEOU) and perceived usefulness (PU) of 1:1 computing for instruction in each of the subject areas. The results indicated that TPACK was a significant moderator of the relationships between PEOU of 1:1 and whole-class science instruction, individualized science instruction, and individualized mathematics instruction. TPACK was also a significant moderator of the relationship between PU of 1:1 and the use of 1:1 for whole-class science instruction and individualized mathematics. TPACK was not a significant moderator of the relationships between PEOU or PU and instruction involving 1:1 in the subjects of English language arts or social studies. These findings suggest that TPACK can strengthen elementary teachers' adoption of 1: 1 for instruction in mathematics and science, but did not support this notion in English language arts or social studies.
Hubungan Pengetahuan Bumil TM III tentang Tanda Bahaya Kehamilan dengan Pemanfaatan Buku KIA
Authors: Alfiana Fina , Purwaningrum Yuniasih , Prijatni Ida
Published: February 2022

At this time, many pregnant women don’t understand the importance of KIA Books. KIA books are often assumed to be a control card that must carry. But too much of information contained has an impact KIA books being less applied by pregnant woman. The purpose of this study was to determine the relationship between knowledge of pregnant women TM III with danger signs of pregnancy use of KIA books. This research design uses probability sampling by means of cluster sampling. The data were taken from a questionnaire given by pregnant women TM III.  Research subject is pregnant women with TM III, data were analyzed by the spearman rank test. This study involved 62 pregnant women TM III. The result is 19 respondents (30.6%) have good knowledge, in detail 15 respondents (24.4%) use KIA books and 4 respondents (6.5%) didn’t use KIA books.  Meanwhile, 21 respondents (33.9%) were knowledgeable enough, in detail 11 respondents (17.7%) used KIA books and 10 respondents (16.1%) didn’t use KIA books. Then, 22 respondents (35.5%) had less knowledge, indicating that 16 respondents (25.8%) used KIA books and 6 respondents (25.8%) didnt use KIA books. Spearman rank test results obtained value 0.764 > = 0.05. In conclusion, there is no relationship between the knowledge of pregnant women TM III about the danger signs of pregnancy with the use of the KIA books. So it is important to understand the KIA books for pregnant women with TM III to detect the danger signs of pregnancy so that they can be handled quickly and appropriately.
Clay-toothed Giants (Part 2)
Authors: Riaud Xavier
Published: February 2022

Franklin Roosevelt was the 32nd president of the United States of America, a position he held from 1933 to 1945. He is the only American president to have been elected four times. However, he died just months into his fourth term due to health complications.
The Physiological Basis Of The Oral Surgical Management Of A Patient With Polycythemia Rubra Vera: A Pathway For The Development Of A Protocol
Authors: Ogunsalu Christopher
Published: February 2022

Various oral surgical procedures are currently performed under local anaesthesia and conscious sedation as a day surgery procedure. Both oral and intravenous conscious sedation are available as a choice. Oral sedation with Alprazolam and Codeine is very effective for most oral surgical procedures especially the removal of impacted third molars and surgical placement of implants. It is this sedation regimen that comprises the synergistic use of both aprazolam and codeine to effect sedation with amnesia that is the standard procedure at the Faculty of Dentistry of the International Postgraduate Medical College. The purpose of this case report is to appraise the possible negative effect of Alprazolam and Codeine sedation mentioned above on a patient who presented with polycythaemia rubra vera (a very rare haematological condition). This is because the codeine component of this combination will depress the respiratory centre in the medulla oblongata putting the patient at risk.

The case study is that of a 70-Year-old male patient who had been a regular patient for approximately 10 years ago at the Faculty of Dentistry, International Postgraduate Medical College (IPMC), where a total upper denture and a partial lower denture were placed. The patient returned in 2019 with the chief complaint of halitosis and pain in the mandibular posterior right region. The patient gave past medical history of PRV, epilepsy and hypertension and history of being on multiple medications for these conditions. The treatment plan advised was total extraction of the remaining mandibular dentition and excisional biopsy of the suspicious lesion mesial to the mandibular right first molar, together with a complete lower denture replacement. The procedure was done without sedation and at no time was the patient considered to be in danger as it relates to oxygen saturation, carbon dioxide drive to the brain and bleeding.

Every hematologist managing patients with PRV will be very concerned as to how these patients are managed by dentists, particularly as it relates to oxygen saturation, carbon dioxide drive to the brain and hemostasis. Similarly, most dental practitioners that are managing such patients may not be familiar with the technicalities surrounding the clinical and operative management of these patients. It is for this reason that this case report focusing on oral surgical management of a patient with PRV is of significance to the dental literature, particularly as it aims to develop a working group for the development of the protocol for the management of PRV.
What Drives Event Discovery Apps User Behaviors Among Generation Z? Evidence from Macau
Authors: Tsai Chin-Hsun (Ken) , (Joan) Su Ching-Huia , Chan Ho-Kai , Liu Jin
Published: February 2022

The purpose of this research is threefold: (1) to develop a theoretical framework for the investigation of event discovery mobile applications (event discovery apps) usage behavior, (2) to examine the core determinants from the technology acceptance model (TAM), and (3) to study the
effect of moderating factors in explaining the relationships of influential factors among young event-goers. Generation Z event discovery apps usage behavior was examined by incorporating the psychology-based TAM to understand motivational factors better. Results revealed that core TAM factors
(perceived ease of use and perceived usefulness) influenced Generation Z's event discovery apps adoption behavior. Additionally, price value and perceived enjoyment, as extensions of the TAM, were found to have a significant influence on Generation Z's attitude and intention. This research
contributes to the body of knowledge pertaining to the "Generation Smart" (Generation Z) by filling the void in the psychological literature on young consumerism and provide empirical research with a replicable theoretical framework. Further, for members of the festival and event industry
alike (e. g., destination marketing organizations), this research offers up-to-date and insightful information that pertains to the needs of young consumers while developing self-enabled products or services to empower smart event development and advance the marketing efforts of local festivals
and events.
Dampak dan Upaya Pencegahan Stigmatisasi Masyarakat terhadap Pasien Covid-19 di Badung-Bali
Authors: Armynia Subratha Hesteria Friska , Peratiwi Indra
Published: February 2022

The pandemic is one of the most serious public health problems globally. This is like what happened in early 2020 when the COVID-19 outbreak first occurred in Wuhan. The threat of this pandemic is getting bigger when various cases show that transmission can occur between humans (human to human transmission). However, in this case, many Covid-19 sufferers are stigmatized. This study aims to determine the impact and efforts to prevent community stigmatization of Covid-19 patients in 2021. This study uses a qualitative descriptive study with observation methods and in-depth interviews with health workers with 8 positive cases of COVID-19 and 2 respondents who were not confirmed positive. . This research was conducted from March 1 – March 6, 2021. The results of this study indicate that the emergence of stigmatization during the COVID-19 pandemic was based on the lack of public knowledge, supported by unverified information or uncontrolled fake news which caused concern and fear. people who are excessive so that they have incorrect perceptions and carry out discriminatory treatment. Effective prevention that can be done to minimize stigma is the provision of education or education in the form of health campaigns and promotions to the community as well as screening of hoax news so that the public gets information from credible official sources.
Pengalaman Praktikan Ners Terhadap Proses Pembelajaran Praktik Profesi Ners Masa Pandemi Covid-19 STIKes ICsada Bojonegoro
Authors: Khayudin Bayu Akbar , Angger Anugerah H S
Published: February 2022

ABSTRAK

Wabah corona virus disease 2019 (Covid-19) yang telah melanda 215 negara di dunia, memberikan tantangan tersendiri bagi lembaga Pendidikan. Melalui Kementerian Pendidikan dan Kebudayaan Pemerintah telah melarang perguruan tinggi untuk melaksanakan perkuliahan tatap muka (konvensional) dan memerintahkan untuk menyelenggarakan perkuliahan atau pembelajaran secara daring. Akan tetapi perguruan tinggi dengan program studi keperawatan akan mengalami hambatan dalam menjalankan proses pembelajaran. Tujuan penelitian Mengekspolrasi pengalaman praktikan ners terhadap proses pembelajaran praktik profesi ners masa pandemi covid19. Desain Penelitian Kualitatif dengan pendekatan fenomenologi. Pengumpulan data  menggunakan metode wawancara mendalam secara tatap muka, yang melibatkan 5 partisipan. Hasil penelitian ini mendapatkan 4 tema. Kesimpulan dari penelitian ini adalah Pengetahuan praktikan ners tentang metode pembelajaran adalah Pembelajaran Daring Dan Luring Yang Kurang Efektif. Kondisi psikologi praktikan ners dalam pelaksanaan pembelajaran praktik profesi adalah merasakan kesedihan dalam proses belajar di masa pandemic dan merasa kecewa tidak mendapat ilmu penuh dan harapan praktikan ners dalam proses pembelajaran masa pandemic covid19 adalah berharap covid segera berakhir
Adaptation of the Cardiovascular and Endocrine Systems of Primary School Children to Cognitive Load When Performing a Test on a Laptop
Authors:   Institute of Developmental Physiology, Russian Academy of Education, Ermakova Irina V. , Sharapov Alim N. , Adamovskaya Oksana N. , Dogadkina Svetlana B. , Kmitʼ Galina V. , Rubleva Larisa V.
Published: February 2022

Adaptation of children’s body to cognitive activity is an important issue for developmental physiology. The purpose of this study was to assess the nature of short-term adaptation of the cardiovascular and endocrine systems of primary school children to cognitive load when performing a test on a laptop. Materials and methods. Using spectral and temporal analysis of heart rate variability, electrocardiography, bipolar rheoencephalography, tonometry, and enzyme immunoassay to determine cortisol concentrations in saliva, we examined 32 primary school children (10–11 years old) performing a cognitive task (Anfimov’s tables) on a laptop. The cardiovascular system parameters were assessed before and during the test, the saliva was collected before and after the cognitive load. Results. In primary school children, the process of short-term adaptation of the cardiovascular and autonomic nervous systems to cognitive load was going favourably, without straining the regulation mechanisms, and was accompanied by an increase in sympathetic influences and heart rate, a decrease in the RR interval, and an increase in the tone of medium and small vessels in the occipital regions of the brain without changes in the indicators characterizing blood flow intensity. Two types of reaction of the endocrine system to cognitive load were revealed: 1) an increase in cortisol concentration in the saliva, observed in 40 % of children; 2) a decrease in the level of cortisol, characteristic of the majority of the examined schoolchildren. The obtained results showed that short-term adaptation of heart rate and haemodynamic parameters to cognitive load in primary school children is a problem-free process. A distinctive feature of children of this age is the manifestation of a proactive response of the endocrine system to the effects of environmental factors, which manifested itself in an increase in the level of the stress hormone cortisol before cognitive load.
Impact of TB Prevention Measures and Capacity of TB Facilities on HIV/TB Incidence in the Russian Arctic
Authors:   Saint-Petersburg State Research Institute of Phthisiopulmonology of the Ministry of Healthcare of the Russian Federation, Zagdyn Zinaida , Tsvetkov Valeriy V. ,   Smorodintsev Research Institute of Influenza, Zhao Yimeng ,   Saint-Petersburg State Research Institute of Phthisiopulmonology; University of Michigan Medical School
Published: February 2022

Increased migration, high prevalence of drug-resistant TB and HIV the role of a healthcare system that adequately meets the Arctic zone features in the era of its intensive industrialization and globalization becomes urgent. The study is aimed to identify the main challenges in the healthcare systems that affect HIV, TB and HIV/TB coinfection spread in the Arctic zone of the RF. Materials and methods. The HIV, TB, HIV/TB coinfection incidence rates per 100 000 population/year during 2007-2019, the economic, human resources capacity of TB facilities, TB preventive measures results among PLWH in the Arctic regions of the RF are evaluated. The statistical data were obtained from the corresponding forms of federal statistical observation and from Federal Research Institute for Health Organization and Informatics of the Ministry of Health of the RF. Results. The worst HIV (315,8%), TB (136,1%) and HIV/TB (150,0%) incidence rates and the highest deterioration of buildings and structures of TB facilities (100,0%) are identified in the ChAD. Conclusion. The HIV, TB and HIV/TB coinfection incidence in Arctic regions of the RF is uneven. It is necessary to provide more detailed studies on assessing the HIV, TB, HIV/TB coinfection prevalence, evaluate the health system capacity in each district of Arctic zone.
Impact of Environmental Factors on the Risk of Cardiovascular Disease in the Population of the Arctic
Authors:   Tyumen Cardiology Research Center, Branch of Tomsk National Research Medical Center, Russian Academy of Sciences, Sergeychik Oksana I. , Yaroslavskaya Elena I. , Plyusnin Arkadiy V.
Published: February 2022

Arctic territories are one of the priorities in the comprehensive geopolitical and geoeconomic development of the Russian Federation. In this regard, such issues as a new Arctic healthcare model, stabilization of the demographic processes, health protection, and increasing life expectancy of the indigenous and newcomer population are growing in importance. The Arctic is an area of special strategic interest to Russia not only because of the prospects for natural resource development, but also due to the rapid global climate change. The implementation of large-scale competitive projects requires an influx of labour force, leading to a predictable increase in the population of the Arctic settlements. Indigenous peoples living on the Arctic territories of the Russian Federation comprise a special population group, which needs state support due to the vulnerability of its traditional way of life and its original habitat. The state policy of sustainable development is being implemented with regard to them. This article presents a review of the literature analysing the impact of etiopathogenetic mechanisms of unfavourable climatic and geophysical factors on the human cardiovascular system in the Arctic. It has been shown that a significant proportion of the risks of cardiovascular events in the Arctic is linked to environmental pollution (as a result of active human economic activity) and to adverse climatic conditions. Improving the technologies of Arctic healthcare from the standpoint of 4P medicine (aimed to reduce the risk of cardiovascular disease) and understanding the mechanisms of the adverse effects of natural climatic and anthropogenic factors will significantly enhance the quality of medical care and preserve the health of the indigenous and newcomer population of the Russian Arctic.
Study of the effect of the VEGF receptor blockade on the antiischemic activity of the compound GK-2 in a rat hind limb ischemia model
Authors: Pekeldina E. S. , Miroshkina I. A. , Sorokina A. V. , Sazonova N. M. , Vititnova M. B. , Kryzhanovskiy S. A.
Published: February 2022

Earlier, in experiments in vitro and in vivo, it was shown that the TrkA receptor agonist compound GK-2, which was a low molecular weight NGF mimetic, had pronounced angiogenic and antiischemic activity. However, it remained unclear whether this activity was associated with the activation of VEGF-A, since, on the one hand, there are reports that NGF-mediated angiogenesis can be initiated by activating NGF of the vascular endothelial growth factor VEGF-A, and on the other hand, it is shown that a selective antagonist of Flk1 receptors specific for VEGF-A, compound SU-5416 does not affect the angiogenic effect of NGF. Purpose of the investigation. Study of the selective VEGF blockade effect on the antiischemic activity of the TrkA receptor agonist GK-2. Methods. Evaluation of the compound GK-2 antiischemic activity was assessed in model experiments simulating hind limb ischemia in rats. Results. It has been shown that against the background of blockade of VEGF-A binding with specific for it (VEGFR1 / Flt-1 / and VEGFR2 / KDR /) receptors, bevacizumab (2.5 mg / kg, i.p., every 3 days for 14 days) compound GK-2 (1 mg / kg, i.p., daily, for 14 days) realizes its antiischemic activity. Conclusion. The results of these experiments indicate that the selective blockade of VEGF does not significantly affect the anti-ischemic activity of the dipeptide NGF mimetic compound GK-2, which has the properties of a TrkA receptor agonist.
To the possibility of detecting the "coronary theft" syndrome in small laboratory animals
Authors: Tsorin I. B. , Simonenko S. A. , Vititnova M. B. , Kryzhanovskiy S. A.
Published: February 2022

The purpose of the study. There are investigation of the possibility of using the laser Doppler flowmetry method to assess blood microcirculation and analyze the mechanisms of its regulation in conditionally intact and ischemic myocardium in small laboratory animals (rats) to identify the "coronary theft" syndrome. Materials and methods. The experiments were carried out on white mongrel anesthetized (urethane 1300 mg/kg /b) male rats weighing 200-250 g. 28 days after the reproduction of an experimental myocardial infarction in an open chest and artificial lung ventilation, the microcirculation level was assessed in conditionally intact and ischemic areas of the myocardium by laser Doppler flowmetry. Using spectral wavelet analysis, the amplitudes of microcirculation oscillations normalized to the total perfusion associated with various regulation mechanisms were determined. Results. It was found that the microcirculation level is significantly lower in the ischemic zone of the myocardium compared with the conditionally intact one (17.3±2.8 and 30.3±1.3 per. units, respectively, p = 0.006, n = 8). Spectral wavelet analysis showed that in the ischemic injury zone, in comparison with the conditionally intact myocardium, the amplitudes of microcirculation oscillations normalized to the general level of microcirculation increase for all regulatory mechanisms. Conclusion. The laser Doppler flowmetry method can be used to assess the intensity of microcirculation in conditionally intact and ischemic myocardium. Using this method makes it possible to identify the "coronary theft" syndrome in experiments on small experimental animals.
ACTIVIDAD ANTIBACTERIAL Y COMPOSICIÓN QUÍMICA DEL ACEITE ESENCIAL DE LA Aloysia aloysioides Loes
Authors: Castro Mandujano Nino , Huanca Miranda Carmen , López Rodilla Jesús , Bautista Cruz Nelson
Published: February 2022

En la presente investigación se estudió al aceite esencial de la “lima-lima” (Aloysia aloysioides Loes y Moldenke), fue colectada en el distrito de Tintay, Apurímac-Perú, los pobladores de esta zona, lo utilizan por sus propiedades antiinflamatorias en forma de emplastos. El objetivo es extraer y caracterizar al aceite esencial de la Aloysia aloysioides Loes & Moldenke y evaluar la actividad antibacteriana. A partir de 674 gramos de muestra fresca (ramas) se obtuvo el aceite esencial por destilación por arrastre con vapor, luego, se caracterizó realizando un análisis fisicoquímico, cromatográfico por CG-EM, espectroscópico FT-IR y el análisis antibacteriano. Se obtuvo el aceite esencial con un rendimiento de 0,38%; se identificó al β-Cariofileno (10,88 %), limonelo (9.9 %), p-cimeno (7,22%), Oxido de cariofileno (5,98 %), Nerolidol (4,96 %) y α-humuleno (4,92 %) como componentes mayoritarios. Además, este aceite esencial tiene actividad antibacteriana frente a Staphylococcus aureus, hasta un 73% de efectividad cercano a la gentamicina; por estas razones podría ser usado en preparaciones farmacéuticas.
QUÍMICA VERDE – UNA ALTERNATIVA ECO-AMIGABLE EN LA OBTENCIÓN DE NANOPARTÍCULAS DE AG0
Authors: Alarcón Hugo , Tolmos Macarena , Villacrés Nelson , Huarote Emily
Published: February 2022

El interés por las nanopartículas de plata (AgNPs) se debe a sus propiedades ópticas, catalíticas y antibacterianas; las cuales dependen de su tamaño, forma y estabilidad coloidal. Las AgNPs pueden ser obtenidas mediante técnicas químicas, físicas y biológicas; sin embargo, el enfoque de “Química Verde” promueve el desarrollo de investigaciones que no incluyan sustancias tóxicas o condiciones de costo elevado en la síntesis de nanopartículas, una alternativa es el uso de extractos de plantas, algas, hongos, bacterias y virus como agentes reductores y estabilizantes en el proceso de síntesis. Por tal motivo esta investigación emplea extractos etanólicos pétalos y hojas de t para la obtención de AgNPs con un tamaño de partícula menor a 50 nm. Mediante UHPLC‑ESI-Q-Orbitrap-MS-MS se identificaron los metabolitos secundarios mayoritarios presentes en los extractos etanólicos, las AgNPs fueron caracterizadas mediante UV-Vis, FTIR, DLS y FE-SEM.
Impact of Online Business Model on Indian Economy
Authors:   Asistant Professor, Department of Commerce, Nutan Adarsh Arts, Commerce and  M. H. sWegad Science College Umred, Dist – Nagpur, Babde Dr. Gajanan Gopalrao
Published: February 2022

Indian economy is fastest growing economy in whole world and the largest market in whole world. In context to this there is a wide scope for development of offline and online market. Since last 15 years use of internet and smart phone are increased and playingkey role in development of e-commerce market. Essential infrastructural features like convenient payment method, cash on delivery, fast delivery of product, costumer oriented attractive schemes, easy method to return product etc. play vital role in development in ecommerce. Government’s different policies like Digital India and Start-up also give motivation to people for online shopping. In India, the online business market was 3.9 billion US$, which increase and reach to 12.6 billion US$ in 2013 and 38.5 billion US$ in 2017. This paper focuses on the impact of online business model on the Indian economy.
Analysis of computational fluid dynamics (CFD) on fiber reinforced self-compacting concrete
Authors:   Department of Civil Engineering, Bharath Institute of Higher Education and Research, Chennai, Tamil Nadu, India, C Anbalagan , S Thenmozhi ,   Department of Civil Engineering, St.Joseph’s Institute of Technology, Chennai, Tamil Nadu, India, V Gowri ,   Department of Civil Engineering, St.Joseph’s Institute of Technology, Chennai, Tamil Nadu, India, S Banupriya ,   Department of Civil Engineering, St.Joseph’s College of Engineering, Chennai, Tamil Nadu, India
Published: February 2022

An experimental and CFD analysis of self-compacting concrete uses quarry dust and various partial flea ash substitutes, silica fumes, and both flea ash and silica fume combinations to construct a finely-structured polypropylene reinforced concrete beam. Using three different fractions of fiber volume, this article investigates the influence of polypropylene fibers on self-compacting concrete beams (2.0 percent, 2.5 percent and 3.0 percent). The M30 grade was taken into consideration. This study employed a computational fluid dynamics tool to model the experimental beam and failure scenarios. The three-dimensional CFD technique method used to model concrete beams has proven to be a reliable predictive tool for concrete beam analysis. However, when performing non-linear CFD analysis, it is critical to select appropriate finite elements and the correct mesh density in order to obtain a satisfactory solution to the problem. Furthermore, it has been discovered that linear regression may provide a good forecast of first crack load, deflection at first crack load, yield load, deflection at yield load, ultimate load, deflection at ultimate load, and ultimate load, deflection at ultimate load. There is a high level of agreement between the forecast and the test findings.
Comparison of Diesel Engine Performance between a Mechanical Pump and a Common Rail Fuel Injection System Equipped with Real-Time Non-Surfactant Emulsion Fuel Supply System
Authors: Md Mujibur Rahman  , Wira Jazair Yahya  , Hasannuddin Abd Kadir  , Ahmad Muhsin Ithnin  , Qayyum Mohd Tamam  , Hasbullah Abdul Rahman
Published: February 2022

The global focus in emulsion fuels is due to the advantages over conventional diesel fuels. It has the capabilities to simultaneously reduce the emissions of NOx and smoke. It also said to reduce the fuel consumption of diesel engine by significant percentages. However, due to the interdependency on surfactant, emulsion fuel does not seem to be possible as alternative fuel in an economic perspective. This is because of the high market price of the commercial surfactant. Therefore, this research focused on non-surfactant W/D that produced by a system known as Real-Time Non-Surfactant Emulsion Fuel Supply System (RTES). RTES has been applied with the goal of investigating the impact on exhaust emissions and fuel consumption of a mechanical pump fuel injection system diesel vehicle (MP) and a common rail fuel injection system diesel vehicle (CR). A one-ton truck represents as MP (Mechanical Pump) and an SUV represent as CR (Common rail) are the test vehicles for the said research. The non-surfactant W/D with 6.5 wt.% of water produced by the RTES used as the test fuel and named as E6.5. It has been emulsified in the RTES right before being injected into the diesel vehicles. The testing was performed on a chassis dynamometer following the West Virginia University 5-peak cycles. The findings show that the utilization of non-surfactant W/D has increased the fuel consumption by 7.39% for MP and 3.2% for CR respectively as compared with base diesel fuel. NOx, smoke emissions and exhaust temperature have significantly reduced by the MP relative to CR vehicles. Overall, the concept of non-surfactant W/D seems to have implementation potential for reducing harmful emissions from both diesel-powered vehicles.
Physician-led quality improvement: a blueprint for building capacity
Authors: Mathura Pamela , Marini Sandra , Spalding Karen , McMurtry Natalie , Kassam Narmin
Published: February 2022

Physicians have a vital role to play in health system transformation, and their committed involvement provides an opportunity for comprehensive improvement and change. Health care has been shifting to a team-based, integrated, and collaborative approach, with a greater expectation for physicians to engage and lead quality improvement (QI). However, there are many barriers to physician QI capability, participation, and leadership. A physician leader at a university and a provincial health care organization’s executive director recognized this challenge and developed an innovative coalition, the Strategic Clinical Improvement Committee, to build organizational capacity for physician-led QI. Six key principles and approaches underpin the coalition: QI as inseparable from care, accountability, a team approach, organic growth through training, academic credibility, and return on investment, including 14 enabler strategies. To date, achievements include the completion of over 60 physician-led QI projects, development of a summer health care improvement elective course, receipt of grants totaling $250 000, 16 QI papers published in peer-reviewed journals, and numerous projects shared nationally and internationally at conferences. The coalition has propelled a shift toward a physician-led improvement culture at the direct care level. The criticality of sustaining this culture of physician QI engagement and leadership will require balancing competing priorities, limited resources, and various other health system influences.
A Mock Catalog of Gravitationally-lensed Quasars for the LSST Survey
Authors: Yue Minghao , Fan Xiaohui , Yang Jinyi , Wang Feige
Published: February 2022

We present a mock catalog of gravitationally-lensed quasars at z
qso < 7.5 with simulated images for the Rubin Observatory Legacy Survey of Space and Time (LSST). We adopt recent measurements of quasar-luminosity functions to model the quasar population, and use the CosmoDC2 mock galaxy catalog to model the deflector galaxies, which successfully reproduces the observed galaxy-velocity dispersion functions up to z

d
∼ 1.5. The mock catalog is highly complete for lensed quasars with Einstein radius θ

E
> 0.″07 and quasar absolute magnitude M

i
< − 20. We estimate that there are ∼103 lensed quasars discoverable in current imaging surveys, and LSST will increase this number to ∼ 2.4 × 103. Most of the lensed quasars have image separation Δθ > 0.″5, which will at least be marginally resolved in LSST images with seeing of ∼0.″7. There will be ∼200 quadruply-lensed quasars discoverable in the LSST. The fraction of quad lenses among all discoverable lensed quasars is about ∼10%–15%, and this fraction decreases with survey depth. This mock catalog shows a large diversity in the observational features of lensed quasars, in terms of lensing separation and quasar-to-deflector flux ratio. We discuss possible strategies for a complete search of lensed quasars in the LSST era.
Far-ultraviolet to FIR Spectral-energy Distribution Modeling of the Stellar Formation History of the M31 Bulge
Authors: Leahy Denis , Seminoff Noah , Leahy Cameron
Published: February 2022

M31 is being surveyed at far- and near-ultraviolet with the UVIT telescope on AstroSat. The central bulge of M31 was observed in the N279N (275–280 nm), N219M (200–240 nm), F172M (160–185 nm), F169M (145–175 nm), and F148W (120–180 nm) filters. These images are made publicly available here. The UVIT data are supplemented with Sloan Digital Sky Survey data in optical, Spitzer data in near-infrared and Herschel data in mid- and far-infrared. The resulting far-ultraviolet to IR spectral-energy distributions for the bulge and for 10 subregions, are modeled using combinations of simple stellar populations and with CIGALE models. We find a dominant old (10–12 Gyr) metal-rich ([Z/H] ∼ 0.3) population and a younger (600 Myr) solar abundance ([Z/H] ∼ 0) population throughout the bulge. For the innermost 120″ we find an additional very young (25 Myr) metal-poor ([Z/H] ∼ −0.7) population. The results are consistent with the most recent stellar population studies of the bulge, which find the two populations for the whole bulge and a third young population in the innermost bulge.