bluuebunny/crossref_metadata_2025 huggingface dataset:
АНАЛИЗ ПОДХОДОВ К ЧИСЛЕННОМУ МОДЕЛИРОВАНИЮ ГОРЕНИЯ ПЫЛЕУГОЛЬНОГО ТОПЛИВА В ТУРБУЛЕНТНОМ ПОТОКЕ
Authors: Пронин Александр Константинович , Гиль Андрей Владимирович
Published: November 2022

Актуальность исследования обусловлена необходимостью точного воспроизведения математическими моделями экспериментальных измерений, так как численное моделирование широко применяется как для разработки новых технологий сжигания твердого топлива, так и для модернизации существующих котельных агрегатов. А как известно, предсказанные численным моделированием параметры пылеугольного факела напрямую зависят от того, как моделируется химия горения в турбулентном потоке.

Цель: исследование точности воспроизведения экспериментальных измерений для четырех подходов к численному моделированию воспламенения и выгорания горючих компонентов пылеугольного топлива в турбулентном потоке.

Объекты: температуры, концентрации газовых компонентов (CO2, O2, CO и NOx), аксиальные и

тангенциальные компоненты скорости внутри топки IFRF 2,4 МВт.

Методы: сравнение экспериментально измеренных параметров пылеугольного факела и предсказанных численным моделированием. Численное моделирование выполнялось с использованием программного пакета ANSYS FLUENT. Горение угольной пыли в топке смоделировано как двухфазная турбулентная система течений, состоящая из газовой и дискретной фаз.

Результаты. Проведено численное моделирование горения пылеугольного топлива в турбулентном потоке четырьмя разными подходами: моделями равновесной химии с одной и двумя переменными смешения; моделью «обрыва вихря» и её комбинацией с кинетической моделью горения. Сравнительным анализом результатов моделирования с экспериментально измеренными параметрами пылеугольного факела установлено, что все исследованные подходы к моделированию горения пылеугольного топлива в турбулентном потоке демонстрируют довольно хорошее совпадение с экспериментальными данными. Модель «обрыва вихря» в комбинации с кинетической моделью горения имеет преимущество в точности, а модель равновесной химии с одной переменной смешения имеет преимущество в скорости сходимости решения.
СПОСОБ ПОВЫШЕНИЯ ЭКОНОМИЧЕСКОЙ ЭФФЕКТИВНОСТИ ПРИМЕНЕНИЯ ПРОТИВОТУРБУЛЕНТНЫХ ПРИСАДОК
Authors: Банерджи Таноя , Шестаков Роман Алексеевич
Published: November 2022

Актуальность исследования обусловлена необходимостью повышения экономической эффективности перекачки нефти и нефтепродуктов путем снижения гидравлических потерь и выноса образовавшихся водных скоплений с использованием противотурбулентных присадок. Этот способ применения присадок является энергосберегающим, минимизирующим эксплуатационные затраты на транспортировку нефти и нефтепродуктов.

Цель: определить и предложить применение противотурбулентных присадок в качестве способа

увеличения скорости потока перекачиваемой среды для выноса образовавшихся локальных неподвижных водных скоплений на локальных низинах профиля трубопровода, приводящих к

уменьшению его эффективного диаметра и повышению гидравлических потерь.

Объекты: скопившиеся водные образования на низменном участке линейной части магистрального

нефтепродуктопровода.

Методы: математический анализ влияния противотурбулентной присадки для оценки перспективы ее

энергоэффективного использования в качестве способа увеличения скорости потока транспортируемой среды, технико-экономический расчет, отражающей стоимость противотурбулентной присадки и электроэнергии при перекачке.

Результаты. Выполнен анализ способов вычисления выносной скорости потока транспортируемой

среды. Предложена методика вычисления концентрации противотурбулентной присадки, необходимой для достижения потоком жидкости выносной скорости, при невозможности повышения допустимого рабочего напора из-за ограниченной несущей способности трубопровода. Рассмотрено влияние возрастания эффективного диаметра трубопровода, что является побочным следствием влияния противотурбулентной присадки, которое, с одной стороны, повышает гидравлическую эффективность присадки, а с другой стороны, снижает потребляемую мощность электроэнергии после прекращения ввода присадки. Приведены результаты вычисления экономической целесообразности применения противотурбулентной присадки и сравнительный анализ стоимости перекачки с противотурбулентной присадкой и без нее. Рассмотрены соответствующие аналитические зависимости для оценки эффективности.
Questioning business English teaching during the pandemic era: Challenges and prospects in E-learning
Authors: Benabdallah Awicha
Published: November 2022

The COVID-19 pandemic resulted in the shutdown of industrial, economic, academic, and public institutions all across the world to ensure social separation among individuals. On the education ground, decision-makers called for a switch from on-the-ground to online instruction as a remedy to this challenging issue. This study, therefore, aimed to investigate the primary challenges that English for Specific Purposes teachers and learners encounter in the Higher School of Management of Tlemcen, Algeria in E-learning classes, as well as the most effective ways and skills to cater to the needs of this global age during this pandemic era. This research is a case study conducted on 5 ESP teachers and 60 first-year learners. The data collection was through a questionnaire and a semi-structured interview. Findings revealed that despite their recognition of the vital importance of such courses, both teachers and learners encounter a set of challenges related to organizational, technological, pedagogical, and psychological issues.
Keywords: Business English; COVID-19; E-learning; pandemic.
Influence of social media on EFL undergraduate students’ academic learning performances during Covid-19 lockdown period
Authors: Abdelmajdid Benraghda , Boutaghane Meriem , Benterkia Benterkia Souhila , Benraghda Abdelmadjid
Published: November 2022

Due to the spread of the pandemic, the learning system has changed which affected the students’ performance to master the English language appropriately inside classrooms. Social media is an essential means that facilitate the learning process for both learners and teachers. Therefore, this study aims to find out if the students are affected negatively or positively in their learning process through the use of social media during the COVID-19 pandemic, and how social media contributes to EFL students. This study has been carried out using a qualitative interview conducted with 9 (male and female) students. In this study, the findings revealed that third-year EFL students beneficially used social media applications; they were impacted positively by the adoption of social media in learning the English language. So, students’ learning performances were improved. Also, the COVID-19 pandemic affected their English language skills positively.
Keywords: Academic learning performances; COVID-19 pandemic; Lockdown; online learning social media.
Tri Phytochimique et Activités Antimicrobiennes des Extraits Hydroacétoniques de Baphia Nitida (Fabaceae) sur Shigella spp et E. coli, Deux Entérobactéries Impliquées dans les Diarrhées Infantiles à Daloa, Côte d’Ivoire
Authors: Akré Djako Sosthène Thierry , Kouamé Kan Benjamin , Okou Obou Constantin , Diakité Daouda , Ackah Jacques Auguste B. A. , Djaman Allico Joseph
Published: November 2022

Introduction : Dans le but de contribuer à une prise en charge efficiente des diarrhées infantiles et des troubles gastrointestinales, nous avons évaluer les activités antibactériennes des extraits des organes (feuilles tiges et racines) de Baphia nitida, une plante de la pharmacopée ivoirienne. Méthodes : Ainsi, un tri phytochimique des extraits hydroacétoniques d’organes de B. nitida à partir les réactions de précipitations et de colorations suivi des tests de sensibilité antimicrobienne sur Shigella spp et E. coli ATCC 25922 ont été réalisés. Resultats : Les résultats obtenus ont montré que les trois organes de plante étaient riches en polyphénols, flavonoïdes, alcaloïdes et tanins cathéchiques. En plus, les extraits des feuilles de B. nitida ont présenté une plus grande diversité d’autres métabolites secondaires faiblement représentés. Les extraits de B. nitida se sont revélés bactéricides pour les deux souches testées. Ces actions seraient dose –dépendante avec une inhibition maximale à c =.200 mg/mL. Les extraits des feuilles ont montré une activité antibactérienne plus efficace que les extraits de tiges, eux mêmes plus actifs que les extraits de racines. Conclusion : Les souches d’E. coli testées se sont revelées plus sensibles que celles de Shigella spp pour les trois types d’organes de B. nitida. Les extraits des organes de B. nitida (en particulier les feuilles) pourraient constituer une alternative pour le traitement des diarrhées et une nouvelle source de molécules naturelles antiinfectieuses.
Oktatás – ruralitás – társadalmi környezet
Authors: Bíró A. Zoltán , Bodó Julianna
Published: November 2022

A tanulmány a romániai székelyföldi térség kapcsán vizsgálja azt a kérdést, hogy milyen tényezők alakítják az oktatáshoz való viszonyulást, milyen szerepe van a vidéki jellegű tömbmagyar térségi társadalomnak az iskolához és a tanuláshoz való viszony formálódásában.A székelyföldi térség sajátos helyzetéből adódóan a térségi magyar oktatást négy tényező keretezi: a hivatalos állami intézményrendszer, a kisebbségi helyzet, a térségi identitásépítési folyamat és a térségi rurális társadalom működési módja. A tanulmány a csíkszeredai KAM – Regionális és Antropológiai Kutatások Központja kutatási eredményeit összegezve tárgyalja azt, hogy a lokális vagy mikrotérségi közösségek életmódja, értékrendje, normavilága milyen módozatok révén keretezi a családok, a szülők számára az oktatáshoz való mindennapi viszonyulást. A szerzők azt emelik ki, hogy oktatás és a helyi, mikrotérségi közösségekközti viszonynak a korábbi évtizedek során kialakult – napjainkban is releváns – kapcsolatát a párhuzamosság jellemzi, ebben a viszonyban a távolságtartás és az egymáshoz kapcsolódás egyaránt folyamatosan jelen van.
A review of civil society organizations concepts through content analysis
Authors: Vllasaj Kushtrim , Szabados György Norbert , Bába-Bácsné Eva , Orbán Szabolcs Gergely
Published: November 2022

Day by day, civil society organizations (CSOs) are becoming an increasingly important factor in all areas of the socio-economic system. The interest in their study has also increased, although the place, role, and definition of their terminology and concepts, needs to be further clarified, as their meaning changes conditionally. Through content analysis, this article reviews the literature by addressing a sample of 136 journal articles published in the period 2015-2019 in two big databases. The findings show that CSOs literature is dominated by qualitative works of social sciences authors who mostly use the term Non-Governmental Organizations (NGOs). This paper is also elaborated on the main themes which dominate the text of the articles. Furthermore, the main concepts of this literature, development, organizations, international, local and other words are analyzed here. The significance of this study is that it aims to provide CSOs researchers with a clearer description of the terminology and concepts the most commonly used.
Korai kötődést befolyásoló tényezők az asthmás krónikus beteg gyermeket nevelő családokban
Authors: Józsa Tamás
Published: November 2022

XXI. századunkban számos nagy népegészségügyi jelentőségű pszichoszomatikus megbetegedéssel kell megküzdenünk. Kutatások kimutatták, hogy az asthma bronchiale kapcsán kardinális befolyásoló tényező az anya-gyermek kapcsolat. Jelen kutatás célja, hogy feltárja a kora gyermekkori kötődési faktorok lehetséges szerepét e zavar hátterében. 130 fő 10-18 év közötti asthmás gyermek és az ő édesanyjuk került bevonásra a vizsgálatba, velük egy szocio-demográfiai kérdőív (a kora gyermekkori élmények feltérképezése céljából), a Gyermek Multidimenzionális Szorongás Skála (a gyermekekkel) és a Beck Szorongás Leltár (az édesanyjukkal) került felvételre. Különösen a szoptatás kapcsán mondhatjuk azt, hogy valószínűsíthető protektív faktor mind a gyermekek, mind pedig az édesanyjuk kötődésének és szorongásának alakulása szempontjából. A prevenció szempontjából lényeges intézményi lehetőséget biztosítani a krónikusan beteg gyermekek és szüleik számára, valamint a kötődési faktorok vizsgálatát még hangsúlyosabbá tenni a jövendőbeli kutatások során.
Effects of Air Pollution on Mortality and Morbidity in Samsun Province of Turkey
Authors: TOPÇU YENERÇAĞ Feyza Nur , SÜNTER Ahmet Tevfik
Published: November 2022

Objective: We aimed to evaluate the relationship between hospital admissions and hospitalizations from respiratory system diseases, cardiovascular diseases, neurological and psychiatric diseases with air pollution. The second aim of the study was to calculate the total number of deaths that can be attributed to air pollution with the AIR Q + program.Methods: The study is a descriptive type of ecological study. As the determinant of air pollution, daily PM10 data from all stations located in the central districts of Samsun were used. The records of all applications and hospitalizations that received any of the ICD-10 diagnostic codes I00-99, J00-99, F00-99, and G00-99 were included in the study. Correlation and regression analysis were conducted to explain the relationships between hospital admissions, hospitalizations, and PM10 and meteorological parameters.Results: The annual average of PM10 was found to be 50.4±19.3 μg/m3. There were positive and statistically significant correlations between the daily number of admissions of all diseases evaluated with PM10. Positive and statistically significant correlations were found between hospitalizations for only respiratory and cardiovascular system diseases with PM10. Admissions from respiratory system diseases (3%), cardiovascular (2%), neurological (1%), and psychiatric diseases (1%) and hospitalizations from respiratory diseases (%2) increased for every 10 μg / m3 increase in PM10 level. The annual average of PM2.5 was found to be 31.8 μg/m3 using the AIR Q + program. The number of natural deaths that can be attributed to air pollution in 2018 was 835 (12.3%), and the estimated number of deaths attributable to 100,000 people at risk was 111.8 (RR: 1.14).Conclusion: Hospital admissions and hospitalizations are increasing due to air pollution. Many deaths and adverse health effects can be prevented by reducing the air pollution that increases especially in the winter period to the determined limit values.
Sexual Dysfunction in Turkish Women During the Covid-19 Pandemic: Anxiety and Related Factors
Authors: DAĞLI Elif , TOPKARA Nilüfer
Published: November 2022

Objective: During the pandemic process, the sexual domain may have been affected in women due to the change in the routine, the limitation of freedom, and the psychological destructiveness of helplessness. Since it is not known how long the pandemic will last, it is necessary to clarify the consequences of the strict control measures on women's sexual satisfaction and experiences. Therefore, the current study aimed to evaluate the relationships between the prevalence of Sexual dysfunction (SDF) in women and anxiety and some other factors during the COVID-19 pandemic in Turkey.Methods: This cross-sectional and descriptive study consisted of 520 women of reproductive age (18-49) who were sexually active, were married, and volunteered to participate in the study were included in the sample. We reached the women included in the study via the online questionnaire link. Exclusion criteria were being diagnosed with COVID-19, having a chronic or psychiatric illness, being pregnant or puerperal, breastfeeding, and taking medicine that reduces libido during the previous three months.Results: The mean age of the women was 35.16 ± 5.53 years, 48.3% of them had equal income and expenses, and 77.3% had economic concerns. It was determined that 60.6% of the women had SDF, 55.4% had high state anxiety, and that 67.5% had high trait anxiety. As the state and trait anxiety scores of women increased, the desire, arousal, lubrication, orgasm, and satisfaction scores of the female sexual function index decreased, while the pain score of the index increased. It was found that the risk for SDF was 4.899 times higher in women who did not have social security, 3.401 times higher in those who were dissatisfied with their marriage, and 2.764 times higher in women with less sexual intercourse due to the pandemic process (OR = 4.899; OR = 3.401; OR = 2.764, respectively).Conclusions: The results of this study indicated that SDF increased, and the frequency of sexual intercourse decreased compared to the pre-pandemic period due to the fear of COVID-19 infection and the high anxiety level brought in by the process. Women who experience the impact of the pandemic more and more every day are especially at risk for poor mental health outcomes.
Estudos de usuários no sistema de informação museal
Authors: Dutra Larissa Fernandes , Pereira Frederico César Mafra
Published: November 2022

É objetivo deste estudo investigar o comportamento informacional de sujeitos invisibilizados no ambiente do museu, propondo uma discussão que levante atributos considerados importantes para o engajamento desse público nesses espaços. Para tanto, reúne fundamentos teóricos ligados ao sistema de informação museal, caracterizando o seu público, além de selecionar modelos de Estudos de Usuários da Ciência da Informação, visando relacioná-los ao âmbito do museu. O levantamento teórico em questão, permitiu a construção de um roteiro de entrevistas diretas com a amostra, que buscou compreender o comportamento informacional deste grupo nesses ambientes. Para auxílio a análise do conteúdo obtido, fez-se uso de ferramentas como o iFeel e o Iramuteq, respectivamente. Os resultados apontam que a maioria dos indivíduos entrevistados são do sexo masculino, pretos e de baixa renda, que não visitam museus com frequência por não compreenderem bem as exposições, afirmando faltar clareza nas informações transmitidas. Caracterizam-se como pessoas curiosas, que buscam por informação, todavia expõem um sentimento de insatisfação em relação as informações obtidas na visita a museus. Como melhoria propõem o acréscimo de guias, um trabalho em relação a qualidade das informações expostas, além da inserção de tecnologias, como totems e Qrcodes.
Holocaust als non-fictie in de hedendaagse Nederlandse en Vlaamse jeugdliteratuur
Authors: Kalla Irena Barbara
Published: November 2022

The past two decades have seen a growing proliferation and generic (intermedial) diversification of Holocaust-related fiction and non-fiction in the Dutch language. At the hands of Dutch and Flemish authors of the third generation as well as writers who do not have a personal connection with the Holocaust, genres as diverse as the historical novel, picture books, the graphic novel, comic books and informational books have become the platform for creative engagement with the Shoah. In view of the growing temporal distance separating contemporary readers from the actual events of the Holocaust children’s literature, we saw its informative function being reinforced and revaluated. In this paper, I review Dutch and Flemish children’s literature about the Holocaust created in the 21st century. Special attention is paid to the literary methods and interventions used by authors in order to authenticate the narrative and frame it as non-fiction. These strategies demonstrate the further change in child images: the child is increasingly becoming a full-fledged participant in society and is as such entitled to historical truth, even if this truth is horrifying.
Online Self-Regulated Learning Strategies in the Process of Writing Undergraduate Thesis: A Survey Study
Authors: Hapsari Astri , Fatmasari Tiara Ayu
Published: November 2022

This survey study aims to identify EFL undergraduate students’ online self-regulated learning strategies in the process of writing their undergraduate theses during COVID-19 pandemic. 97 senior students agreed to participate in this study. This study used a 24-item questionnaire adapted from Barnard et al. (2009) Online Self- Regulated Learning Questionnaire (OSLQ). The results revealed that the participants’ online self-regulated learning strategies in the process of writing their undergraduate theses from the highest to lowest mean score were: environment structuring, help-seeking, self-evaluation, goal setting, time management, and task strategies. Environment structuring had the highest average score, indicating that undergraduate English Education students were able to choose and arrange places for online learning to minimize distractions so that their learning could run optimally. However, the ability of self- regulated learning strategies in the task strategy domain had the lowest average score. The results displays that in the process of writing undergraduate theses, participants’ ability in task strategies needed to be improved. For further research, the researchers recommend further investigation on the relationship between undergraduate students’ motivation and ability in implementing their self-regulated online learning strategies in writing undergraduate thesis. Future research should also include metacognitive learning strategies and re-examine the relationship of undergraduate students’ online self-regulated learning strategies to their online learning performance in writing undergraduate theses.
Genotype Diversity, Wild Bird-to-Poultry Transmissions, and Farm-to-Farm Carryover during the Spread of the Highly Pathogenic Avian Influenza H5N1 in the Czech Republic in 2021/2022
Authors: Nagy Alexander , Stará Martina , Černíková Lenka , Hofmannová Lada , Sedlák Kamil
Published: November 2022

In 2021/2022, the re-emergence of highly pathogenic avian influenza (HPAI) occurred in Europe. The outbreak was seeded from two sources, resident and reintroduced viruses, which is unprecedented in the recorded history of avian influenza. The dominating subtype was H5N1, representing a reversion to the original A/goose/Guangdong/1/1996-like subtype combination. In this study, we present a whole genome sequence and a phylogenetic analysis of 57 H5N1 HPAI and two low pathogenic avian influenza (LPAI) H5N1 strains collected in the Czech Republic during 2021/2022. Phylogenetic analysis revealed close relationships between H5N1 genomes from poultry and wild birds and secondary transmission in commercial geese. The genotyping showed considerable genetic heterogeneity among Czech H5N1 viruses with six different HPAI genotypes, three of which were apparently unique. In addition, second-order reassortment relationships were observed with the direct involvement of co-circulating H5N1 LPAI strains. The genetic distance between Czech H5N1 HPAI and the closest LPAI segments available in the database illustrates the profound gaps in our knowledge of circulating LPAI strains. The changing dynamics of HPAI in the wild may increase the likelihood of future HPAI outbreaks and present new challenges in poultry management, biosecurity, and surveillance.
Developing PHYCOM (Physics Comics) on Newton’s Law Material for 10th Grade High School Students
Authors: Baifeto Ekri Pranata Ferdinand , Samsudin Achmad , Efendi Ridwan , Athiyyah Royhanun
Published: November 2022

This research aims to develop high school physics teaching materials in the form of comics. This research method is a research and development (R&D) method. The steps in this method are Analysis-Design-Development-Implementation-Evaluation (ADDIE). A validation test was carried out using a questionnaire to obtain valid Physics Comics (PHYCOM) teaching materials. This feasibility test was carried out by three validators consisting of 1 high school physics teacher, two lecturers, and six 10th-grade high school students. Comics are said to be valid and feasible to use because they meet the validity percentage at a value of 61% - 100% (valid criteria and very valid). Based on the results of the feasibility test of the three validators, it was found that PHYCOM's teaching materials were very valid and feasible to use, with a percentage of 87.50%. The validation results from six students showed that PHYCOM was a very valid teaching material with a validity percentage of 91.18%. The results of this validation indicate that PHYCOM is valid and suitable to be used as teaching materials for 10th high school students. The advantage of PHYCOM teaching materials is that they are communicative and contain illustrative images so that they are easy to visualize. In addition, PHYCOM teaching materials can be used by students as independent study materials.
Risk-based prioritization of operational condition assessments : methodology and case study results
Authors: Alt Jonathan , Brown Willie , Gallarno George , Richards John , Olszewski Jennifer , Rice Titus
Published: November 2022

USACE operates, maintains, and manages more than $232 billion of the Nation’s water resource infrastructure. USACE uses the Operational Condition Assessment (OCA) to allocate limited resources to assess condition of this infrastructure in efforts to minimize risks associated with performance degradation. The analysis of risk associated with flood risk management (FRM) assets includes consideration of how each asset contributes to its associated FRM watershed system, understanding the consequences of the asset’s performance degradation, and a determination of the likelihood that the asset will perform as expected given the current OCA condition ratings of critical components. This research demonstrates a proof-of-concept application of a scalable methodology to model the probability of a dam performing as expected given the state of its gates and their components. The team combines this likelihood of degradation with consequences generated by the application of designed simulation experiments with hydrological models to develop a risk measure. The resulting risk scores serve as an input for a mixed-integer optimization program that outputs the optimal set of components to conduct OCAs on to minimize risk in the watershed. This report documents the results of the application of this methodology to two case studies.
Malaria Elimination: What Can Africa Learn from China?
Authors: Nkfusai Ngwayu Claude , Ngou Olivia , Ekoko Subi Caroline , Sofia Mohlin  , Fidele Bemadoum  , Teboh Sylvanus , Wirsiy Frankline , Bain Luchuo
Published: November 2022

For decades now, malaria has been an important public health concern in Africa, which bears the greatest burden for the disease, affecting children and adults alike. Although a few countries (Australia, Brunei, Singapore, and Algeria, among others) have previously eliminated malaria, the World Health Organization (WHO), on June 30, 2021, declared China malaria-free. This commentary seeks to explore what China did differently to eliminate malaria and what Africa can learn from China’s experience. First, Africa can use innovative tools and strategies used by China to attain success. Second, Africa can create a multi-sector collaboration among Heads of States in high burden malaria-affected countries by involving all stakeholders such as ministries of health, finance, research, education, development, public security, the army, police, commerce, industry, and information technology, customs, media and tourism to jointly fight malaria in all African countries. Furthermore, African countries could adapt the genetics-based approaches used by China in the elimination of mosquito breeding grounds. Finally, Africa can also adapt a better surveillance system of reporting on malaria daily as China did in their experience.
 
Copyright © 2022 Ngwayu Nkfusai et al. Published by Global Health and Education Projects, Inc. This is an open-access article distributed under the terms of the Creative Commons Attribution License CC BY 4.0.
Breastfeeding Duration More than 18 Months Possibly Lowers the Risk of Language Development Delay in Children Aged 18–35 Months
Authors: Faradilah Andi , Rusyaidi Andi Musafir , Jalaluddin Syatirah , Savitri Ary I
Published: November 2022

Studies have demonstrated the benefits of breastfeeding (BF) on children’s cognitive function and language development. However, most cognitive and language tools used in these studies have limited ability to identify children’s language development delays. The Language Development Survey (LDS) is expected to provide detailed information on children’s language development. This study aimed to examine the association between BF duration and children’s LDS. A questionnaire was administered to 286 BF mothers to obtain information on their BF duration, and LDS was employed to assess children’s language development. Language delays were detected in 91 (31.8%) children (LDS-vocabulary) and 35.7% children (LDS-phrase). This study also found that children who were breastfed for ≤6 months and 7–18 months had an adjusted OR (AOR) of 0.86 of LDS-vocabulary, and 0.8 of LDS-phrase, whereas children who were breastfed for >18 months had AOR’s LDS-vocabulary of 0.57 and LDS-phrase of 0.46. This study found no significant association between BF duration and LDS score. Nevertheless, BF duration of >18 months possibly lowers the risk of children’s language development delay. More studies are required to investigate this observation’s relationship with children’s language development.
Modelo de costos para incrementar la utilidad de una empresa fabricadora de transformadores, Santa Anita, Lima, Perú, 2021
Authors:   , Villagomez Julca Abigail Ana , Melendez Sucasaca Milagros Sthefany , Huaman Flores Pablo Luis , Puris Arias Yamilik Antuane
Published: November 2022

El presente trabajo de investigación tiene por objetivo implementar una mayor revisión y seguimiento de los procesos de producción, con el fin de incrementar la utilidad, a través de herramientas que permitan mejorar el orden laboral en la empresa. En el primer capítulo se detalla los aspectos generales de nuestra organización tales como: las áreas que integran la empresa para su funcionamiento, los objetivos y estrategias para que la empresa logre sostenerse en el mercado. Las empresas de eléctricas hoy en día son uno de los rubros que se ha ido expandiendo en el Perú, no obstante, la escasez de estrategias económicas - financieras, ha obstruido el desarrollo económico; la falta de control y seguimientos de los gastos de las empresas afecta de manera directa al rendimiento de la organización, esto se ve plasmado en los minúsculos resultados positivos la utilidad a fin al final de un periodo determinado. Estudios indican que la rentabilidad es una herramienta financiera que mide el rendimiento (operativo y financiero) de la empresa, y es importante para la toma de decisiones de la gerencia, con el fin te tener un crecimiento empresarial, siempre y cuando la utilización de los recursos sea gestionada de manera óptima, por el contrario, se llegará a un estancamiento que disminuiría la utilidad deseada por los accionistas. Finalmente, el presente trabajo abordara los diversos factores que puedan ayudar a nuestra organización implementar un modelo de costos con el fin de incrementar la utilidad por cada producto fabricado.
Plan de negocios para la producción y comercialización de galletas saludables de aguaymanto con colágeno hidrolizado en el ámbito de Lima moderna
Authors:   , Curo Torres Nancy , Naranjo Costa Roxana Priscilla , Pérez Cáceres Gloria Amelia , Retes Huaman Gabriela Edith , Torres Lomas Giannina Beatriz
Published: November 2022

A lo largo de los últimos años en el Perú, ha crecido el mercado interesado por vivir de una manera más saludable y por utilizar para la preparación de sus alimentos, insumos más naturales y menos procesados. A este mercado se agrega personas que son diagnosticadas con condiciones de salud; como los celíacos, entre otros, que requieren de cuidados adicionales en cuanto a la elaboración y consumo de sus alimentos. Es en este contexto, que las alternativas de snacks saludables han cobrado importancia y cubren necesidades. A continuación, detallaremos los beneficios de los principales insumos, contenidos en nuestras galletas. En primer lugar, el colágeno que tiene la función de contribuir a la elasticidad de diferentes partes del cuerpo humano como tendones y articulaciones, músculos y ligamentos, y el beneficio que se conoce más se encuentra en la piel. Otro insumo utilizado es la harina de yuca, que contiene cantidades de minerales importantes y necesarias como el calcio, magnesio y potasio; además, mantiene un equilibrio de la glucosa en la sangre y crea una sensación de saciedad a lo largo del día, asimismo otro beneficio de la harina de yuca es que no contiene gluten, lo cual la hace apta para el consumo de personas celiacas. Finalmente, tenemos al aguaymanto, que contiene propiedades antioxidantes, ayuda al organismo a manejar los efectos negativos del estrés, tiene un nivel importante de vitaminas A y C, que desarrollan un sistema inmunológico más fuerte. Buscando satisfacer a las personas que buscan snack saludables y prácticos de transportar, se tomó la decisión de crear MISKUSI, un emprendimiento que produce galletas de aguaymanto con colágeno, en presentación de bolsa de 480 g neto que contiene 30 galletas…
Elaboración e implementación de un plan para la valorización de residuos de aparatos eléctricos y electrónicos (RAEE) - Paneles fotovoltaicos en San Antonio Recycling S.A. (SAR) y la correspondiente evaluación del impacto ambiental
Authors:   , Muroy Takara Lorena Akemi
Published: November 2022

El presente trabajo de suficiencia profesional se desarrolló en la Empresa Operadora de Residuos Sólidos ¨San Antonio Recycling S.A.¨ con el objetivo de elaborar e implementar un plan de valorización de paneles fotovoltaicos y posteriormente evaluar los impactos ambientales asociados a dicha actividad. Debido a que el marco normativo peruano en temas de gestión de residuos sólidos y en temas de energía renovable está en constante desarrollo y crecimiento, la generación de paneles fotovoltaicos como residuo aumentará y al mismo tiempo la obligatoriedad en su manejo integral. Para la elaboración e implementación del plan de valorización de paneles fotovoltaicos se identificaron las operaciones necesarias para la gestión del material, los recursos humanos y financieros, la infraestructura para el procesamiento, documentos guías para protocolizar la valorización, así como el presupuesto necesario para su desarrollo. De igual forma se precisó el cronograma de trabajo e indicadores para el seguimiento y evaluación del plan de valorización. En cuanto a la evaluación de los impactos ambientales se establecieron aspectos y componentes ambientales relacionados a cada proceso operativo, para posteriormente valorar el impacto haciendo uso de una Matriz de Identificación y Valoración de Aspectos Ambientales. Los resultados de la implementación del plan de valorización mostraron que de 10 016.5 toneladas de paneles fotovoltaicos recibidos en la empresa, 1 414.02 toneladas de railes metálicos (14.12 %) se valorizaron en el mercado nacional y 8 592.48 toneladas de vidrio fotovoltaico de silicio amorfo (85.78 %) junto con 10 toneladas de cajas de conexión…
Comprehensive Fluid Compositional Analysis Program to Support the Interpretation of Chichimene Field In-Situ Combustion Pilot
Authors: Manrique E. J. , Trujillo M. L. , Lizcano J. C. , Cardenas D. A. , Vanegas J. W. , Portillo F. , Salazar H. , Caicedo N.
Published: November 2022

The evaluation of enhanced oil recovery (EOR) methods in Colombia has been very active during the past decade. One of the most recent and promising pilots is the in-situ combustion (ISC) in Chichimene field, starting in September 2019. Based on international ISC field experiences, this pilot represents a unique case study given the depth (≈8,000 ft) of this heavy crude oil (9 °API) reservoir.

The pilot project consists of one injector, seven producers, and two temperature observation wells between the injector and first-line wells. Production response shows encouraging results. Its interpretation is supported by a comprehensive fluid compositional analysis, which is the main objective of this paper.

This paper describes the compositional analysis of produced fluids (gas, oil, and water) and the influence of the current flow assurance program. Geochemical simulations support the evaluation of scaling tendencies, and possible corrosion trends are based on iron and manganese concentrations following the National Association of Corrosion Engineers (NACE) standards. Crude oil analysis is based on conventional techniques (i.e., acid number, distillation curves, etc.) and biomarkers to infer possible thermal maturation changes in the produced oil.

Results confirm predicted cycles of CO2 and H2S during the planning of the monitoring program. The solubility of both gases in water leads to their acidification and the formation of carbonate and sulfate scales characterized in production wells. The precipitation of solids was also influenced by the N2-based H2S scavenger decomposition downhole due to the water pH increment observed with the dosage increases. The scaling tendencies did not impact the productivity due to the high reservoir permeability. The precipitation of iron species made it difficult to interpret NACE standards to infer corrosion except for wells shut in for more than 2 months showing a higher concentration of Fe and Mn. However, a recent casing inspection job at one of the first-line producers shows no corrosion signs. Heavy metals such as nickel and vanadium were analyzed in water to infer the possible corrosion or thermal cracking of porphyrins in crude oil. Changes in the paraffinic fractions and biomarkers (i.e., methyl phenanthrene index, mono- and tri-aromatic steroids) suggest an increased thermal maturity of the produced oil. The robust monitoring program has provided important insights from the ISC process and flow assurance strategy supporting possible expansion plans.

This study provides valuable guidelines for monitoring programs based on compositional analysis of produced fluids, including the influence of production chemistry. Lessons learned through the Chichimene ISC monitoring program can be valuable in interpreting thermal and potentially nonthermal EOR projects.
Data-constrained analytical model for the propagation of a penny-shaped hydraulic fracture under true triaxial stresses
Authors: Feng Runhua , Sarout Joel , Dautriat Jeremie , Zhang Jiecheng , Roshan Hamid , Rezaee Reza , Sarmadivaleh Mohammad
Published: November 2022

Hydraulic fracturing is a coupled multi-physics and scale-dependent process requiring an extensive numerical-laboratory appraisal to assess feasibility in the field. Developing a robust model of hydraulic fracture propagation requires knowledge of the time evolution of the fracture’s geometrical attributes, e.g., width/aperture and length/radius. However, it is inherently challenging to directly measure even the simplest fracture attribute (i.e., radius) within a rock sample subjected to in-situ stresses in the laboratory, let alone in the field. In this study, an analytical model (Rd) is developed based on Poiseuille’s law. Scaling laws and dimensional analysis are used to define propagation regimes; and non-linear hydro-mechanical coupling is accounted for the near-tip region. This model aims to predict the time evolution of radius for a homothetic penny-shaped hydraulic fracture when the fracture opening, and internal pressure gradient are known. Based on the available experimental data from literature, we quantify the growth of the fracture radius using linear elastic fracture growth model (RE); tip asymptotic solutions (RV and RT); semi-analytical solutions (RS); and the model Rd. A comparison of the four analytical models with published experimental data reveal that (i) the asymptotic solutions are limited to linearly elastic and homogeneous materials, i.e., PMMA; (ii) the semi-analytical solutions (RS) is only suitable for late-time propagation (iii) the performance of the linear elastic model (RE) poorly matches the experimental data, especially for unstable propagation situations; (iv) the new Rd model takes advantage of a robust reconstruction of the temporal radius growth of hydraulic fracture problems under realistic stress conditions, and including multiscale propagation regimes, cohesive effects, as well as stable and unstable propagation regimes of geomaterials.
Real-world effectiveness of third-line cabazitaxel in patients with metastatic castration-resistant prostate cancer: CARD-like analysis of data from a post-marketing surveillance in Japan
Authors: Matsuyama Hideyasu , Matsubara Nobuaki , Kazama Hirotaka , Seto Takeshi , Sunaga Yoshinori , Suzuki Kazuhiro
Published: November 2022

Background: The CARD trial was conducted in patients with metastatic castration-resistant prostate cancer (mCRPC) who had received docetaxel and experienced disease progression within 1 year on an androgen receptor-axis-targeted therapy (ARAT). Subsequent treatment with cabazitaxel had improved clinical outcomes compared with an alternative ARAT. This study aims to confirm the effectiveness of cabazitaxel in real-world patients in Japan and compare their characteristics with those of patients from the CARD trial.
Methods: This was a post-hoc analysis of a nationwide post-marketing surveillance registering all patients who were prescribed cabazitaxel in Japan between September 2014 and June 2015. Included patients had received docetaxel and ≤1 year of an ARAT (abiraterone or enzalutamide) prior to receiving cabazitaxel or an alternative ARAT, as their third-line therapy. The primary effectiveness endpoint was the time to treatment failure (TTF) of the third-line therapy. Patients were matched (1:1) from the cabazitaxel and second ARAT arms based on propensity score (PS).
Results: Of the 535 patients analysed, 247 received cabazitaxel and 288 the alternative ARAT as their third-line therapy, of which, 91.3% (n=263/288) received abiraterone and 8.7% (n=25/288) received enzalutamide as their second third-line ARAT. Patients in the cabazitaxel and second ARAT arms had TNM classification of M1 or MX in 73.3% and 68.1%, Gleason score of 8–10 in 78.5% and 79.2% and mean (standard deviation) serum PSA levels of 483 (1370) and 594 (1241) ng/mL, respectively. Mean cabazitaxel dose was ≤20 mg/m2 in 61.9% (n=153/247) of the patients in the cabazitaxel arm. The median TTF (95% confidence interval [CI]) of the third-line therapy was 109 (94–128) days for cabazitaxel and 58 (57–66) days for the second ARAT, with a hazard ratio (95% CI) of 0.339 (0.279–0.413) favouring cabazitaxel. Similar results were obtained after PS-matching, with a hazard ratio (95% CI) of 0.323 (95% CI 0.258–0.402) favouring cabazitaxel.
Conclusions: Consistent with the CARD trial, cabazitaxel demonstrated superior effectiveness over a second alternative ARAT in a real-world patient population in Japan, despite the population having more advanced disease status and a lower dose of cabazitaxel being more frequently administered, than in the CARD trial.
“PERSIAN Eye Cohort Study (PECS): Design, Methodology”
Authors: Alipour Fateme , Hashemi Hassan , Lashay Alireza , Jafari Fatemeh , Motamed-Gorji Nazgol , Behrouz Mahmoud Jabbarvand , Mirzaei Mohammad , Alizade Yousef , Soleymani Mohammad Reza , Shoja Mohammad Reza , Shahraki Kourosh , Khataminia Gholam Reza , Poustchi Hossein , Malekzadeh Reza
Published: November 2022

Purpose:
To report the study protocol, methodology and latest enrollment data of a large epidemiological multi-central eye cohort named PERSIAN Eye Cohort Study (PECS) originated from the ongoing PERSIAN Cohort Study, to investigate the distribution of ophthalmic disorders in different regions and ethnicities of Iran, and determine their associations with various exposures of ophthalmic and non-ophthalmic nature.
Methods:
A central committee designed the study and equipped 6 chosen centers (Khameneh, Some’e Sara, Hoveizeh, Yazd, Rafsanjan and Zahedan), a focal point in each center supervised and managed conduction of the study and the data gathering under close supervision of the central committee.
Results:
This ongoing study launched in 2015. Out of 65,580 eligible participants of 6 centers of the PERSIAN Cohort, 48,618 individuals aged 35-70 have been enrolled in the PECS (response rate: 74.13%) until September 2021. Slit lamp and fundus photography were performed for 28,702 (59.03%) and 27,437 (56.43%) individuals, respectively. The number of participants who were referred for ophthalmology visit was 12,884, of whom, 6,885 completed the ophthalmology visit (response rate: 53.44%).
Conclusion:
This large epidemiological multi-central eye cohort can improve our epidemiological knowledge of prevalent ophthalmic disorders in different regions and ethnicities of Iran, and determine their associations with various exposures of ophthalmic and non-ophthalmic nature. This will be very useful for future planned nationwide and global interventions.
Family physicians’ questions about the COVID-19 pandemic: A content analysis of 2,272 helpline calls
Authors: McDougall Allan , Fortier Jacqueline H. , Zhang Cathy , Ehrat Caroline , Best Kerri , Blois Heather , Garber Gary
Published: November 2022

Background: To evaluate the COVID-related questions and concerns from family physicians and to explore associations between the pattern of COVID-related advice calls and the pandemic’s progression.
Methods: We used a content analysis approach to identify and understand family physicians’ questions and concerns related to the COVID-19 pandemic expressed during calls to the Canadian Medical Protective Association (CMPA) telephone helpline. Calls were classified with preliminary codes and subsequently organized into themes. We collected aggregated data on calls, including province, call date, and whether the physician self-identified having hospital-based activities as part of their practice. Findings from the analysis were explored alongside family physician calls per month (call volume).
Results: Between 01 January 2020 and 31 December 2021, 2,272 family physician calls related to the pandemic were included for content analysis. We identified six major themes across these calls: the impact of the pandemic on the healthcare system; challenging patient interactions; public health matters; physician obligations and rights; virtual care; and COVID-related care. Call volumes were highest early in the pandemic especially among physicians without major hospital affiliation when family physicians practiced with little guidance on how to balance patient care and scarce resources in the face of a novel pandemic.
Conclusions: This research provides unique insight on the effects the COVID-19 pandemic had on family medicine in Canada. These results provide insights on the needs and information gaps of family physicians in a public health crisis and can inform preparedness efforts by public health agencies, professional organizations, educators, and practitioners.