bluuebunny/crossref_metadata_2025 huggingface dataset:
Physical Properties of Sustainable Concrete Bricks with Glass and Polyethylene Terephthalate Scales Wastes as Replacements for Coarse Aggregate
Authors: Rosell Fritz , Nieto Joseph Carrion , Cuicapuza Robert Janampa , Isla Luis Meza , Valenzuela Veronika Contreras , Rivera Jorge Ticlla , Salazar Roberto Vadillo , Moggiano Nabilt
Published: October 2021

In order to improve the sustainable construction in Peru, throughout the recycling of non-biodegradable materials, a study of the influence of glass and Polyethylene terephthalate (PET) wastes in the physic properties of concrete bricks was carried out. They were made with a 1:5:2 cement, fine aggregate, and waste relation. Three proportions were studied named P-01, P-02, and P-03. Each proportion had a different content of glass and PET wastes, as a result, it was found that the average brick’s absorption was increased with PET wastes and it was reduced with glass wastes. On the other hand, the compressive strength value increased with glass wastes and it was reduced with PET wastes. Finally, it was found that P-02 was the most efficient concrete brick proportion to develop a sustainable construction, obeying the requirements of the Peruvian national building regulations.
Strength Analysis of Single-Symmetry Ratio for Single-Symmetry I-Beam
Authors: Hsu Wei Ting , Ho Kun Ze , Liu Yu Xin , Chung Shu Ti
Published: October 2021

Double-symmetry I-beams are the most common beam cross-sections in structural building. Because that is simpler to design and analyze steel profiles than single-symmetry I-beams. However, with the advancement of economy, the improvement of the quality of life and the cultural standards, large-scale emergence of various large span bridges, special bridge-type landscapes and viaducts. Single symmetrical I-section is better than Double-symmetry I-section to fairly in line with demand characteristics and material economy. This study chooses different Iyc/Iy ratio sections, 0.229, 0.23, 0.3 and 0.5. Iyc/Iy =0.23 is the change point of the sudden drop of the strength of the compressed airfoil. In study, the section is divided into three sections of plasticity, inelasticity and elasticity for analysis and comparison. Considering the different section sizes. If the value of Lb for a small non-elastic interval is too large, the section with a smaller cross-section will reach the elastic interval. Taking all section conditions Lb into consideration, taking 1.4m as a section will reach the non-elastic interval, if the value of the longer Lb is too small, the section with the larger section does not reach the elastic interval. In study, 10m is taken as the section to reach the elastic interval, orientation the AISC ( 2017 ) specification is used to analyze the I-beam. Symmetrical wing plate cross-sections were increased and reduced. The strength of the cross-sections between the compressed side and the tensioned side was discussed, and a single-symmetric I-section with the best cross-sectional efficiency was proposed.
Fatigue Property of Welded T-Shaped Joints Using the Structural Stress Method
Authors: Yang Hai Bo , Wang Ping , Qian Hong Liang
Published: October 2021

Various types of welded joints are of wide application in industrial and productional regions, including T-shaped, butt, and fillet joints of steel, stainless steel, and cast steel. Under cyclic fatigue load, the fatigue performance of welded joints is significant for the engineering design and it’s of interest to investigate the fatigue property of the welded joints using the recommended prediction methods. In this paper, the fatigue performance of welded T-shaped joints is investigated. The mesh-insensitive property of the structural stress method is validated with the comparison of various prediction methods. The fatigue cyclic life of welded T-shaped joints under tensile loads is analyzed. The structural stress curve of T-shaped joints with various base metal thicknesses is determined for the engineering design.
Screening of antibiotic residues in raw milk of cows and buffalos by diffusion assays
Authors: Almashhadany Dhary Alewy
Published: October 2021

Although antibiotics are valuable drugs for treatment of certain infections, their presence in foodstuff derived from animals is a potential public health hazard. They pose a serious threat as they are implicated in direct toxicity; allergic reactions; disturbance of the normal gut microbiota, carcinogenesis, and emergence of antibioticresistant bacteria. This study investigated the occurrence of antibiotic residues in raw milk samples derived from cows and buffaloes. Samples were collected randomly from different retail outlets in Erbil city (Iraq) from January 1st to June 30th, 2019. The residues were detected by two diffusion assays against Bacillus subtilis bacteria on agar plates. The total occurrence of residues ranged from 11.9% to 13.4% of screened milk samples. No significant differences were found between milk type or location of animal rearing (urban or suburban). Regarding the seasonal variations, spring was found to be associated with gradual decrease in antibiotic residues levels in milk. Such occurrence rate of residues is alarming and require authorities to observe the quality of raw milk introduced to markets for consumption. Further evaluation of antibiotic stability period in raw milk is also necessary.
Neutrophil extracellular traps and thrombogenesis in COVID-19 patients
Authors: Yaqinuddin Ahmed
Published: October 2021

COVID-19 has caused significant morbidity and mortality around the world. Recent reports point toward the “cytokine storm” as core of pathogenesis in SAR-CoV-2-induced acute lung injury, acute respiratory distress syndrome (ARDS), coagulopathy, and multiorgan failure. We have presented clinical data here wherein cytokine levels in COVID-19 patients do not match typical cytokine storm seen in ARDS. Interestingly, COVID-19 patients in early disease present with hypoxemia with no significant respiratory dysfunction. In addition, it is reported that hospitalized COVID-19 patients have a high incidence of thrombotic complications, especially involving the pulmonary vasculature. We hypothesized that core to pathogenesis of COVID-19 is the dysregulation of neutrophils, which culminates in excessive release of neutrophil extracellular traps (NETs). Recently, an increasing amount of NETs have been seen in sera of severe COVID-19 patients. We have discussed here mechanisms involved which lead to thrombogenesis and vasculitis because of excessive release of NETs.
Note on the only known record of a cupulate seed from the Middle Pennsylvanian Sydney Coalfield, Nova Scotia, Canada
Authors: Zodrow Erwin L.
Published: October 2021

The only known lyginopterid cupulate seed collected from the Middle Pennsylvanian Sydney Coalfield in Nova Scotia, Canada, comprises a coalified cupule surrounding an ovate structure 3×2 mm in size that is interpreted as an ovule. The ovule is white, reflecting its calcitic mode of preservation, and lacks cellular remains. As the specimen is incomplete, a detailed taxonomic determination is not possible, but its affinities lie within the lyginopterid (or hydrasperman) pteridosperms. This significant discovery of a lyginopterid pteridosperm aug-ments previous accounts of medullosalean pteridosperms from the flora of Sydney Coalfield.
Epidemiologic Features and Influencing Factors of Norovirus Outbreaks in the City of Wuxi, China from 2014 to 2018
Authors: Geng Qian , Shen Yuan , Shi Ping , Gao Yu-Meng , Feng Wei-Hong , Xiao Yong , Ma Xiaoying , Xie Shanshan , Wang KeWei , Gao Jie , Shi Chao
Published: October 2021

The study investigated the genotypic changes and epidemiologic features of norovirus outbreaks and factors influencing the attack rate and outbreak duration in Wuxi from 2014 to 2018. Norovirus outbreaks, monitored through surveillance system, were investigated. The norovirus-positive specimens from outbreaks were collected and genotyped using a dual polymerase-capsid genotyping protocol based on a one-step polymerase chain reaction (PCR) amplicon. The genotypes were analyzed by Norovirus Typing Tool Version 2.0. A total of 74 norovirus outbreaks were reported in Wuxi from 2014 to 2018. Most (93.2%) norovirus outbreaks were caused by GII genotypes. The predominant norovirus genotypes in outbreaks have changed from GII.17 (20.3%) in 2014–2015 to GII.P16/GII.2 (40.5%) in 2017–2018. GII.P16/GII.2 in 2017–2018 season were more prevalent than GII.17 in 2014–2015 season (χ2 = 4.741, P = 0.029). 56.7% of the outbreaks occurred in primary schools. The re-outbreak rate was 16.2%. 66.7% of re-outbreaks were caused by norovirus variants different from previous genotypes. Outbreaks in nonprimary school settings (odds ratio [OR]: 4.007; 95% CI: 1.247–12.876) and those leading to temporary school or institution closure (OR: 20.510; 95% CI: 1.806–232.937) were reported with a higher attack rate. The outbreaks in primary schools (OR: 4.248; 95% CI: 1.211–14.903), re-outbreaks (OR: 6.433; 95% CI: 1.103–37.534) and longer report timing (OR: 8.380; 95% CI: 2.259–31.089) declared a significantly longer duration. It is of great importance that the monitoring of norovirus outbreaks for the emergence of novel strains, along with responsive prevention and control intervention should be strengthened in adults and school-age population, especially in primary students and preschool children.
A Lower Global Lung Ultrasound Score Is Associated with Higher Likelihood of Successful Extubation in Invasively Ventilated COVID-19 Patients
Authors: Pierrakos Charalampos , Lieveld Arthur , Pisani Luigi , Smit Marry R. , Heldeweg Micah , Hagens Laura A. , Smit Jasper , Haaksma Mark , Veldhuis Lars , Schmidt Robin Walburgh , Errico Giacomo , Marinelli Valentina , Attou Rachid , David Cristina E. , Zimatore Claudio , Murgolo Francesco , Grasso Salvatore , Mirabella Lucia , Cinnella Gilda , De Bels David , Schultz Marcus J. , Tuinman Pieter-Roel , Bos Lieuwe D.
Published: October 2021

Lung ultrasound (LUS) can be used to assess loss of aeration, which is associated with outcome in patients with coronavirus disease 2019 (COVID-19) presenting to the emergency department. We hypothesized that LUS scores are associated with outcome in critically ill COVID-19 patients receiving invasive ventilation. This retrospective international multicenter study evaluated patients with COVID-19–related acute respiratory distress syndrome (ARDS) with at least one LUS study within 5 days after invasive mechanical ventilation initiation. The global LUS score was calculated by summing the 12 regional scores (range 0–36). Pleural line abnormalities and subpleural consolidations were also scored. The outcomes were successful liberation from the ventilator and intensive care mortality within 28 days, analyzed with multistate, competing risk proportional hazard models. One hundred thirty-seven patients with COVID-19–related ARDS were included in our study. The global LUS score was associated with successful liberation from mechanical ventilation (hazard ratio [HR]: 0.91 95% confidence interval [CI] 0.87–0.96; P = 0.0007) independently of the ARDS severity, but not with 28 days mortality (HR: 1.03; 95% CI 0.97–1.08; P = 0.36). Subpleural consolidation and pleural line abnormalities did not add to the prognostic value of the global LUS score. Examinations within 24 hours of intubation showed no prognostic value. To conclude, a lower global LUS score 24 hours after invasive ventilation initiation is associated with increased probability of liberation from the mechanical ventilator COVID–19 ARDS patients, independently of the ARDS severity.
Clinical and Molecular Epidemiology of Crimean-Congo Hemorrhagic Fever in Humans in Uganda, 2013–2019
Authors: Balinandi Stephen , Whitmer Shannon , Mulei Sophia , Nyakarahuka Luke , Tumusiime Alex , Kyondo Jackson , Baluku Jimmy , Mutyaba Joseph , Mugisha Lawrence , Malmberg Maja , Lutwama Julius , Shoemaker Trevor R. , Klena John D.
Published: October 2021

Crimean-Congo Hemorrhagic Fever (CCHF) is endemic in Uganda, yet its epidemiology remains largely uncharacterized. To better understand its occurrence within Uganda, case reports of patients hospitalized with CCHF between 2013 and 2019 were reviewed. Further, genome sequences of CCHF-positive RNA obtained during this period were determined for phylogenetic comparisons. We found that a total of 32 cases (75% males; CFR, 31.2%), aged between 9 to 68 years, were reported during the study period. Most cases were detected during July to December of each outbreak year (81.2%; P < 0.01) and were located along the “cattle corridor” (68.7%, P = 0.03). The most common presenting symptoms were fever (93.8%), hemorrhage (81.3%), headache (78.1%), fatigue (68.8%), vomiting (68.8%), and myalgia (65.6%). In five patients for whom hematological data were available, varied abnormalities were observed including thrombocytopenia, leukopenia, anemia, lymphopenia, lymphocytosis, polycythemia, and microcytosis. About 56.3% (P = 0.47) of patients reported tick bites or exposure to livestock as their potential source of infection. Person-to-person transmission was suspected for two cases. Using unbiased metagenomics, we found that the viral S- and L- segments have remained conserved in Africa 2 clade since the 1950s. In contrast, the M segment split into two geographically interspersed clades; one that belongs to Africa 2 and another that is ancestral to Africa 1 and 2. Overall, this data summarizes information on the history and clinical presentation of human CCHF in Uganda. Importantly, it identifies vulnerable populations as well as temporal and geographic regions in Uganda where surveillance and control interventions could be focused.
Historia w życiu i twórczości Bogdana Nawroczyńskiego (1882–1974)
Authors: Dormus Katarzyna
Published: October 2021

History as a Theme in Bogdan Nawroczyński’s (1882–1974) Life and Work

History in Bogdan Nawroczyński’s life and work manifested itself in three ways: 1. in his personal life, when he made history as a participant in the 1905 school strikes, 2. in his works serving as a research source in the fields of history and education, and – most importantly – 3. in his own research on the history of pedagogical thought. By highlighting the humanistic aspect of pedagogy as, first and foremost, a broadly defined study of humanity, Nawroczyński called attention to the need to place pedagogical research in the historical and sociological context. He saw it as necessary for pedagogy to become a fully-fledged academic field.
Zielnik Marii Twardowskiej (1858–1907) jako pretekst do szkicu biograficznego kresowej botaniczki
Authors: Korybut-Marciniak Maria , Studnicka-Mariańczyk Karolina
Published: October 2021

Maria Twardowska’s (1858–1907) Herbarium as a Pretext for a Biographical Sketch of the Borderland Botanist

The article presents the figure of Maria Twardowska née Skirmunt (1858–1907), researcher of the Lithuanian flora, promoter of natural science, author of articles on botany, and social activist. Twardowska was one of the first women to conduct independent research on the Polish/Lithuanian flora. She published in ‘Wszechświat’ and ‘Pamiętnik Fizjograficzny’. She kept scientific contacts with Polish botanists – Edward Janczewski, Józef Rostafiński, Władysław Dybowski, and Antoni Rehman. She is the author of the herbarium, which was in the collection of the Poznań Society of Friends of Sciences until the Second World War.
Ý ĐỊNH MUA VÀ SẴN SÀNG TRẢ GIÁ CAO CỦA NGƯỜI TIÊU DÙNG ĐỐI VỚI THỰC PHẨM HỮU CƠ: ỨNG DỤNG MÔ HÌNH HỒI QUY LOGISTICS
Authors: HIỀN NGUYỄN NGỌC
Published: October 2021

Tình hình tiêu thụ thực phẩm hữu cơ đã tăng trong thời gian gần đây và đáp ứng được mối quan tâm của người tiêu dùng về các vấn đề liên quan đến sức khỏe, hạnh phúc và môi trường. Tuy nhiên, việc gia tăng tiêu thụ vẫn còn nhiều hạn chế so với tiềm năng của thị trường. Nghiên cứu này nhằm mục đích điều tra các yếu tố ảnh hưởng đến ý định mua và sẵn sàng trả giá cao của người tiêu dùng đối với thực phẩm hữu cơ. Với một mẫu nghiên cứu gồm 267 người tiêu dùng được khảo sát trực tiếp tại các hộ gia đình ở thành phố Hồ Chí Minh, các giả thuyết đã được kiểm định bằng mô hình hồi quy logistics. Kết quả xác nhận rằng, đặc điểm gia đình, thái độ, nhận thức an toàn và rào cản rủi ro là những yếu tố chính ảnh hưởng đáng kể đến ý định mua và sẵn sàng trả giá cao của người tiêu dùng đối với thực phẩm hữu cơ. Kết quả của nghiên cứu này cung cấp những hiểu biết sâu sắc cho nhà quản lý và tiếp thị về các biến số chính thúc đẩy tiêu thụ thực phẩm hữu cơ trong nước.
MỐI QUAN HỆ GIỮA CHẤT LƯỢNG DỊCH VỤ, SỰ HÀI LÒNG KHÁCH HÀNG VÀ LÒNG TRUNG THÀNH KHÁCH HÀNG ĐỐI VỚI CỬA HÀNG TIỆN LỢI TẠI TP. HỒ CHÍ MINH
Authors: CƯỜNG ĐÀM TRÍ , LONG NGUYỄN THÀNH , LONG NGUYỄN NGỌC , QUANG BÙI VĂN
Published: October 2021

Nghiên cứu này nhằm xem xét mối quan hệ giữa chất lượng dịch vụ, sự hài lòng khách hàng và lòng trung thành khách hàng đối với cửa hàng tiện lợi tại TP. Hồ Chí Minh. Các mối quan hệ này được kiểm định với 1 mẫu gồm 358 khách hàng tại các cửa hàng tiện lợi trong TP. Hồ Chí Minh. Phân tích dữ liệu thông qua sử dụng mô hình cấu trúc tuyến bình phương nhỏ nhất từng phần (PLS-SEM) với phần mềm SmartPLS. Kết quả nghiên cứu cho thấy chất lượng dịch vụ có ảnh hưởng cùng chiều đến sự hài lòng khách hàng và lòng trung thành khách hàng. Kết quả nghiên cứu cũng cho thấy sự hài lòng khách hàng là biến trung gian trong mối quan hệ giữa chất lượng dịch vụ và lòng trung thành khách hàng. Từ kết quả trên, nghiên cứu đưa ra một số hàm ý cho nhà quản lý và hướng nghiên cứu tiếp theo.
VẬN DỤNG KẾ TOÁN TRÁCH NHIỆM XÃ HỘI TRONG CÁC DOANH NGHIỆP NIÊM YẾT VIỆT NAM: RÀO CẢN VÀ GIẢI PHÁP
Authors: HÙNG TRẦN NGỌC , THÚY HẠNH NGUYỄN THỊ
Published: October 2021

Thời gian gần đây trong giới học thuật rộ lên các nghiên cứu về trách nhiệm xã hội của doanh nghiệp (corporate social responsibility - CSR), một khái niệm được các nhà học thuật xây dựng từ trước thế chiến thứ hai và được phát triển rộng rãi vào thập niên 60 của thế kỷ trước. Mặc dù không phải là vấn đề quá mới mẻ tại Việt Nam, tuy nhiên hàng loạt các sự cố ảnh hưởng đến môi trường và xã hội gần đây tại Việt Nam như Fomorsa (Hà Tĩnh), Rạng Đông (Hà Nội) … lại một lần nữa gióng lên hồi chuông cảnh báo về tầm quan trọng của việc nhận thức và áp dụng chế độ kế toán cho trách nhiệm xã hội của doanh nghiệp trong các doanh nghiệp Việt Nam. Dựa trên một số lý thuyết nền tảng về kế toán trách nhiệm xã hội (social and environmental accounting - SEA), bài báo sử dụng các phương pháp nghiên cứu định tính để tổng hợp các bài học trên thế giới khi áp dụng SEA, nghiên cứu đối chiếu với thực trạng vận dụng SEA trong các doanh nghiệp Việt Nam, từ đó chỉ ra các rào cản và dựa vào đó đề ra các giải pháp nhằm nâng cao chất lượng thông tin SEA cũng như khả năng áp dụng trong các doanh nghiệp Việt Nam.
CÁC YẾU TỐ TÁC ĐỘNG ĐẾN HIỆU QUẢ CỦA CÁC DOANH NGHIỆP BẤT ĐỘNG SẢN NIÊM YẾT TẠI VIỆT NAM
Authors: MỸ PHƯỢNG NGUYỄN THỊ
Published: October 2021

Bài viết này ước tính hiệu quả và nghiên cứu các yếu tố tác động đến hiệu quả của các doanh nghiệp bất động sản niêm yết tại Việt Nam (DNBĐSVN) trong thời kỳ 2010-2019. Đầu tiên, nghiên cứu đo lường mức độ hiệu quả của các DNBĐSVN bằng cách sử dụng phương pháp phân tích bao dữ liệu (Data Envelopment Analysis – DEA). Sau đó, nghiên cứu sử dụng kết hợp hai mô hình Tobit và Bayesian Model Averaging (BMA) để xác định các yếu tố tác động đến hiệu quả của các DNBĐSVN. Kết quả nghiên cứu cho thấy hiệu quả theo quy mô trung bình của các DNBĐSVN ở mức 93,01%, với CRSTE là 80,50% và VRSTE là 86,61%, phản ánh rằng các DNBĐSVN chưa sử dụng tối đa các nguồn lực đầu vào. Kết quả mô hình Tobit và BMA chỉ ra rằng qui mô doanh nghiệp, vòng quay tài sản, khả năng sinh lời, sở hữu nước ngoài, giá bất động sản, chỉ số tiếp cận đất đai, tăng trưởng kinh tế, tính dễ tổn thương của khu vực ngân hàng và hiệu quả Chính phủ có tác động cùng chiều, trong khi đó rủi ro hệ thống, cấu trúc vốn, lãi suất và lạm phát có tác động ngược chiều đến hiệu quả của các DNBĐSVN.
Gaz Tungsten Ark Kaynaklı 9Ni Kriyojenik Çelik Bağlantının İçyapı ve Mekanik Özelliklerinin Belirlenmesi**
Authors: SERİNDAĞ Hüseyin Tarık , TARDU Cemal , KIRÇİÇEK İshak Özer , ÇAM Gürel
Published: October 2021

Sıvılaştırılmış doğal gaza (LNG) olan talebin sürekli artmasına paralel olarak LNG depolama tanklarının imalinde düşük sıcaklıklarda mükemmel tokluk, yüksek süneklik ve çatlama direnci gibi olağanüstü özelliklere sahip olan %9 Ni içerikli çelik levhaların kullanımı da artmaktadır. Bu malzemelerin kaynağında, hem ergime bölgesi hem de ısıdan etkilenen bölge dahil olmak üzere tüm kaynak bölgesinde düşük sıcaklık kırılma tokluğu, kabul edilebilir bir seviyede tutulmalıdır. Bu çalışmada, Ni-bazlı bir dolgu teli kullanılarak gaz tungsten ark kaynağı (GTAK) yapılmış 10 mm kalınlığında %9 Ni içerikli düşük alaşımlı kriyojenik çelik kaynaklı bağlantının kaynak bölgesinde içyapıda meydana gelen değişimler ve mekanik özellikleri sunulacaktır. Kaynak bölgesinde oluşan içyapılar optik mikroskop ile detaylı olarak incelenmiştir. Elde edilen kaynaklı bağlantının mekanik özellikleri ve kaynak performans değerleri çekme deneyi ve mikrosertlik ölçümleri ile belirlenmiştir. Ayrıca, kaynaklı bağlantının -196 °C’deki darbe enerjisi Charpy çentikli darbe deneyi ile tespit edilmiş ve esas levhanın bu sıcaklıktaki kırılma tokluğu ile mukayese edilmiştir.
A Review on Fault Detection Using Different Techniques in Electric Power System
Authors: Yadav Ajay , Goad Shalini
Published: October 2021

The Electrical power transmission and distribution power traces performs important roles in Power System strategies it has to reap the crucial continuity of carrier of power supply to the cease users. The power transmission traces join the producing stations and cargo centers. The possibility of fault occurrences in transmission traces could be very high. Since faults can destabilize the electricity device it should be remote without delay for recovery of electricity supply. It is fault evaluation could be very critical difficulty in power approach engineering just so to clean faults fast and repair electricity deliver as quickly as feasible with minimal interruption. In this paper gives a literature evaluate of electricity transmission line faults detection.
AS METODOLOGIAS ATIVAS NA EDUCAÇÃO 4.0
Authors: MARTINS VIEIRA NOGUÊZ SHARON
Published: October 2021

O presente trabalho busca analisar as diferentes metodologias ativas existentes em especial os modelos que podem ser alinhados aos recursos tecnológicos existentes e que possam ser utilizados de forma educativa, como por exemplo, modelos de metodologias ativas, o ensino híbrido, o designer thinking e MOOCS. A educação 4.0 é uma realidade que vivemos e o conceito de aprender fazendo é importante pois desperta a experimentação, criatividade e autonomia dos alunos. A evolução da Web nos apresenta que os números de usuários da internet crescem a cada dia mais e portanto há uma necessidade de alinhamento dos recursos tecnológicos disponíveis no processo de ensino aprendizagem. A nova base nacional comum curricular que já nos aponta o uso das tecnologias e o professor necessita buscar e promover o uso de novas dos recursos tecnologias existentes em sua realidade aliados as metodologias mais diversas, buscando desenvolver mais do que o conteúdo de sua disciplina, mas a pró atividade, responsabilidade, interação e resolução de problemas.
LAZOS ENTRE ESCUELA Y FAMILIA
Authors: Pozzo María Isabel , Camiscia Laura
Published: October 2021

El presente artículo sistematiza una investigación que se propone comprender los modos de participación de familias locales y migrantes en la escuela primaria a partir de un estudio de caso centrado en una institución educativa de la ciudad de Rosario, Argentina, con mayor tasa migratoria respecto del resto de la ciudad. Se enmarca en el enfoque etnográfico por la necesidad de indagar acerca de la participación de las familias de diversos orígenes desde la cotidianeidad de sus protagonistas. El trabajo de campo se basa en la observación participante, el análisis de documentos del archivo escolar y entrevistas abiertas con el personal escolar y familias de los estudiantes, seguido de procedimientos analíticos de reconstrucción, interpretación, contrastación, contextualización y explicitación. Los resultados señalan una alta valoración de las familias migrantes a la posibilidad de escolarización. Dicha valoración, junto a la posesión de recursos simbólicos, definen modos de participación que le son propios a cada familia. El registro de la cotidianeidad muestra múltiples atravesamientos de la familia por lo escolar, dando lugar a lazos marcados por las experiencias subjetivas de ambos.
COMPARATIVE STUDY OF HELIUM BUBBLE FORMATION
IN Cr-Fe-Ni-Mn HIGH-ENTROPY ALLOY AND 18Cr10NiTi STEEL
AFTER IRRADIATION AND POST-IRRADIATION ANNEALING
Authors: Kalchenko А.S. , Karpov S.A. , Kopanets I.E. , Tikhonovsky M.A. , Tolstolutskaya G.D.
Published: October 2021

High entropy alloys (HEAs) are considered for applications in nuclear reactors due to their promising mechanical properties, corrosion and radiation resistance. In order to understand the irradiation effects in HEAs and to demonstrate their potential advantages over conventional austenitic stainless steels, we performed helium ion irradiation experiments with 20Cr-40Fe-20Ni-20Mn high-entropy alloy and 18Cr10NiTi steel under an identical condition. Both alloys have been irradiated to a dose of 4.8 displacement per atom (dpa) and a helium concentration of 11.7 at.% at room temperature. After subsequent annealing at 500 °C the microstructure evolution of irradiated materials was examined. The irradiation promotes the formation of a high density of bubbles in HEA and steel. Comparison of parameters of helium porosity in these materials has been done.
RADIATION-INDUCED EFFECTS IN SILICON
Authors: Gaidar G.P. , Pinkovska M.B. , Starchyk M.I.
Published: October 2021

Results of complex studies of the structural properties of silicon irradiated with light ions of megaelectronvolt energies by fluences greater than 1016 cm–2 are presented. It was found that during irradiation under conditions of large energy release in thin layer of crystal, the favorable conditions can be created for the controlled introduction of structural defects and the appearance of the effects of ordering and long-range. The possibility of layer-by-layer modification of the properties of silicon at depths up to 780 μm under irradiation with ions was established that can be used to provide the actual needs of micro- and nanoelectronics.
РАСПРЕДЕЛЕНИЕ ПОГЛОЩЕННОЙ ДОЗЫ ПО ПЕРИМЕТРУ
И ДЛИНЕ ПОЛИМЕРНОЙ ЗАЩИТНОЙ ОБОЛОЧКИ
ПРИ РАДИАЦИОННОМ ОБЛУЧЕНИИ СУДОВОГО КАБЕЛЯ
Authors: Беспрозванных А.В. , Мирчук И.А.
Published: October 2021

Выполнено исследование распределения поглощенной дозы по периметру и длине полимерной защитной оболочки на основе безгалогенной композиции в зависимости от технологической дозы радиационного облучения образцов судового кабеля. Установлено, что неравномерность облучения по периметру кабеля может достигать 20…30% при технологической дозе в диапазоне 1,25…0,5. Облучение кабеля по длине более равномерное и не превышает 5% при технологической дозе в интервале значений 1,25…0,567. При меньших значениях технологической дозы неравномерность облучения по периметру и длине кабеля увеличивается. Установлено, что при средней поглощенной дозе 210 кГр защитная полимерная оболочка не соответствует требованиям по относительному удлинению при разрыве. Оптимальные физико-механические характеристики полимерной оболочки из безгалогенного материала обеспечиваются при облучении в диапазоне поглощенной дозы 160…170 кГр.
Improvement of the process of production of polysaccharide polyribosyl ribitol phosphate used in the haemophilus influenzae vaccines
Authors: Belyankin AA , Salimova EL , Konon AD , Trukhin VP
Published: October 2021

The production of vaccines requires constant improvement of methods and tools, revision and modernization of the current technology with the aim to improve quality of the product made for the benefit of public health. The purposяe of this work was to improve the process of production of polysaccharide polyribosyl ribitol phosphate (PRP), which is the active agent of Haemophilus influenzae type b (Hib) vaccines. We investigated how PRP yield depends on the following factors: concentration of dissolved oxygen in the culture liquid, glucose concentration control method applied in cultivation, source of protein for the producer microorganism, stability of the polysaccharide at the culture liquid inactivation stage. As a result, we managed to increase the PRP yield in the culture liquid by 10%, ensured a 25% boost of the biomass accumulation rate during cultivation in the fermenter and reduced the cultivation time by 6.5 hours. The PRP loss rate at the culture liquid inactivation stage was reduced by 80%. Relying on the patented composition, we invented a new composition of the nutrient medium that meets the current regulatory requirements.
Implementation of Automation System in Production in Hydroponic Green Feed
Authors:   Doctor of Technical Sciences, Professor Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, Kalandarov P.I.
Published: October 2021

The article deals with the problems of improving the production of fodder and the development of a new method of hydroponic green feed. The use of automation elements using humidity and temperature sensors to regulate the irrigation process, measuring soil moisture, outdoor temperature, as well as additional luminosity is shown. The possibility of using abundant devices to control the technological process is shown. A program has been developed. Amma for control of the technological process of growing green feed, in the programming language for controllers, describes proportionally integral- differential law of regulation to ensure high accuracy of temperature maintenance, giving the method of setting PID coefficients.
Metaphor Is An Important Means Of Perception Of The Universe
Authors:   Doctor of Philology (PhD) Termez State University Uzbekistan, Umurkulov Zafar Bekpulatovich
Published: October 2021

One of the ways of figurative expression of thought with the help of linguistic means is metaphor. The article discusses the role of metaphor in the perception of the world; the basis for the formation of metaphors is the expression of new meanings and concepts.
Stock Price forecasting based on Quantum Particle swarm optimization
Authors:   Hunan University of Science and Engineering, Huang Guohui
Published: October 2021

The stock market is very volatile, so the change of the stock price is also widely concerned by investors. In this paper, a new stock price forecasting model based on Quantum Particle Swarm Optimization(QPSO) , Quantum Bee Colony Optimization Algorithm(QABC) and Quantum Fruit Fly Optimization Algorithm (QFOA) is proposed. The three methods all use BP neural network to adjust the parameters of particle swarm, bee colony and Drosophila to reach the optimal parameters. Taking the daily closing price of CITIC Securities and Tianfeng Securities, a large-scale and a small-scale securities company, as the object of empirical analysis, comparing the accuracy of the three methods in predicting stocks, it also analyzes whether the size of the company has an effect on the accuracy of the model. The results show that the prediction effect of qpso is the best, and the size of the company has some influence on the prediction effect.
Indonesian Defense Strategy to Encounter Challenges in the Indo-Pacific (Case Study: Hegemonic War of China and the United States of America in the South China Sea)
Authors:   Department of Defense Diplomacy, Indonesia Defense University, Prayoga Adhit
Published: October 2021

As an arena of hegemonic war between China and the United States of America (USA), Indo-Pacific has economic value that can increase conflict in the region. This hegemonic war then cultivated rapidly, as evidenced by the expanded issue through the involvement of other countries such as France, Germany, and England. This research basically examined the actions of Indonesia as a non-claimant country in conducting defense strategy to prevent threats that can disrupt its territory, especially in the North Natuna Sea which is adjacent to the South China Sea as the main theater of this hegemonic war in Indo-Pacific. This study was analysed using qualitative method, descriptive analysis and neorealism perspective. As an effort to maintain territorial sovereignty, especially in the North Natuna Sea which is close to South China Sea, Indonesia had done several defense strategies which can be categorized as internal and external balancing. Internal balancing consists of relocation process of fishermen from North Coast of Java to Natuna, increasing trend of defense budget and particular allocation for the security of North Natuna Sea, and execution of combat exercise. External balancing includes cooperation of joint exercises and national defense industry quality improvement through transfer of technology and knowledge, joint development, as well as acquisitions.
Inter-Governmental Relations Between Central Government And Local Government Authorities In Tanzania
Authors:   Bariki Gwalugano Mwasaga, Mwasaga Bariki Gwalugano
Published: October 2021

Tanzania in embarking the decentralization by devolution policy (D by D) as a mechanism of facilitating quick development process through the involvement of people from grass root levels has been carried out through the inter-government relations between the central government and the local government authorities (LGAs). Throughout its implementation there had been a supportive structural set up, including a constitutional mandate for local governments. Also, there has been an increased recognition of LGAs by central and sector ministries as partners rather than subordinate structures. However, the lack of a clear and effective institutional framework to govern the implementation of D by D and the lack of a shared understanding of D by D across ministries and other governmental institutions has made led to structural confusion between the Central government and the Local Government Authorities. Thus, this paper explores the undertakings of the inter-government relations between the central government and the local government authorities (LGAs) in order to forge a way forward for a inclusive and responsive governance in the country.
Legal Protection for Customers Victims of Savings Account Break-ins Crime
Authors:   Master of Law Studies Program, Faculty of Law, Universitas Diponegoro, Risdianto Jeane Stevani
Published: October 2021

This study aimed to analyze the role of Bank Indonesia (BI) and the Otoritas Jasa Keuangan (OJK) of the banking activities in Indonesia and to analyze the legal protection of bank customers. There are two issues discussed in this study, the first regarding the role of OJK and Bank Indonesia in supervising crime in the banking world and the second regarding legal protection for customers victims of savings accounts break-ins crime. The research method used was normative juridical, by studying and reviewing legal principles derived from library materials. The discussions that were discussed in this article were how the role of OJK and Bank Indonesia in supervising crime in the banking world and how legal protection is for customers who are victims of savings account burglary in Indonesia. The Otoritas Jasa Keuangan regulation (PJOK) also requires banks to compensate for losses suffered by customers. Article 29 PJOK Number 1/PJOK.07/2013 states "Otoritas Jasa Keuangan is required to be responsible for Consumer losses arising from errors and/or negligence, management, employees of Financial Services Business Actors and/or third parties working for the interests of the Financial Services Providers. Financial Services Business. Lawsuits that can be pursued through the courts can be in the form of criminal charges or civil lawsuits. Embezzlement of bank customer deposits may be subjected to Article 372 and Article 374 of the Criminal Code (KUHP).
Development of Student Worksheets Based on Problem Based Learning to Improve Creative Thinking Skills of Class XI High School Students
Authors:   Departement Biology of Education, FMIPA, Padang State University, Padang, Indonesia, Mulyani Vania
Published: October 2021

Creativity is the result of a creative thinking process. Creative thinking refers to higher-order thinking processes, this skill is indispensable in the 4.0 revolution era because of the complexity in all aspects of modern life. One of the learning models that can facilitate students in developing their creative thinking skills is Problem Based Learning and the use of printed teaching materials, namely Student Worksheets. The research objective is to produce LKPD based on Problem Based Learning to improve the creative thinking skills of students in class XI SMA. This type of research is development research using the Plomp model. The Plomp model development phase consists of a primary research phase, a development or prototyping phase, and an assessment phase. The instruments used are validity assessment sheets, practicality assessment sheets and essay questions to assess their effectiveness. The results showed that the LKPD based on Problem Based Larning was very valid with a value of 83.25% based on the validation carried out by the validator. The results of the practicality assessment by the teacher showed a value of 94.17% with very practical criteria and the results of the practicality assessment by students getting a score of 87.52% with very practical criteria. The results of the effectiveness test showed that based on the N-Gain Score test conducted in the experimental class, the score was 0.71 in the high category, while the control class scored 0.48 in the medium category, while based on the hypothesis test, it was found that the use of problem-based worksheets was Based Learning is effective in improving students' creative thinking skills. So it can be concluded that the Problem Based Learning-based worksheets that have been developed are very valid, very practical, and effective..
The Effects of Accounting and Market Indicators towards Stock Return of Amman Stock Exchange Index Constituents
Authors:   PhD, Faculty of Economics and Muamalat, University Sains Islam Malaysia, Nilai, Negeri Sembilan, Alswalmeh Ahmad Abdallah Ahmed
Published: October 2021

The returns of ASE companies and share trading have significantly weakened. Numerous companies have been liquidated due to bankruptcy. Investors appear to be less able to find desired investments under these critical conditions. In addition, the investors in Amman Stock Exchange face challenges in determining the accounting and market indicators that affect the stock return. Therefore, this study investigates the effect of twelve accounting and market indicators on the stock return. A yearly data of indicators and company stock price are collected from the ASE website. Panel generalised least squares regression analysis (GLS) has been conducted to accomplish the research objective. Out of twelve accounting and market indicators, the study revealed the TOA had the highest significantly positive effect on stock return. ROA, EPS, STR, and PBV also had a significant positive influence on stock return. In addition, DR had a significantly negative impact on stock return, while the effect of BPS was marginally negative. Besides, MC, ROE, NPM, CR, and PER did not affect the stock return. This study could help investors and portfolio managers to identify the indicators that affect stock returns of ASE Index companies. Further studies in other emerging markets will support the results that came out in this study.
Revisiting the demographic history of Central African populations from a genetic perspective
Authors: Breton Gwenna , Fortes-Lima Cesar , Schlebusch Carina M.
Published: October 2021

Africa is the continent of our species’ origin and the deep history of humans is represented by African genetic variation. Through genetic studies, it has become evident that deep African population history is captured by relationships among African hunter-gatherers and that the world’s deepest population divergences occur among these groups. In this review, we look back at a study published by Cavalli-Sforza and colleagues in 1969 entitled “Studies on African Pygmies. I. A pilot investigation of Babinga Pygmies in the Central African Republic (with an analysis of genetic distances)”. The study analyzed 19 classical polymorphisms and found that the deepest divergences in African populations were represented by hunter-gatherer groups such as the southern African San and the central African rainforest hunter-gatherers. We repeated the original analyses from Cavalli-Sforza et al. [1] with about 22 thousand times more genome-wide genetic markers in populations similar to those included in the original study. Our high-resolution analyses gave similar results regarding the relationships of early-diverging African populations compared to the classical polymorphism analyses. This finding, however, does not imply that research has stagnated and that developments in technology and genetic methods over the last fifty years delivered no additional information regarding African history and adaptation. We review how technology and population genetic methods have advanced to give more detailed inferences about population structure, migrations, admixture patterns, timing of admixture, sex-biased admixture, and inferences of selection and adaptive introgression in rainforest hunter-gatherers and other African populations. We also comment on how sequencing of ancient DNA has influenced findings and deliberate on the progress and development of more complex models of African history, including alternatives to tree-models and the inference of possible archaic admixture in African populations. We review the growing complexity of our picture of population history in central Africa and Africa as a whole, emerging from genomic studies and other disciplines investigating human population history and adaptation. While data and knowledge are accumulating, certain populations and areas remain underrepresented in genomic research. Their inclusion, possibly also through ancient DNA studies, together with new methods of analysis and the testing of representative models of deep population history in Africa, will help to build a more complete picture of past population history in Africa.

Based on “Cavalli-Sforza LL, Zonta LA, Nuzzo F, Bernini L, de Jong WW, Meera Khan P, Ray AK, Went LN, Siniscalco M, Nijenhuis LE, van Loghem E, Modiano G. Studies on African Pygmies. I. A pilot investigation of Babinga Pygmies in the Central African Republic (with an analysis of genetic distances). Am J Hum Genet. 1969 May;21(3):252-274”.
“Parece que tão escondendo alguma coisa”: discursos coloniais sobre a venda de rua senegalesa em Porto Alegre (RS)
Authors: Césaro Filipe Seefeldt de
Published: October 2021

Este artigo trata de discursos recentes sobre a venda de rua senegalesa na cidade de Porto Alegre (RS). O objetivo é descrever como tal presença pública e irregular é situada por diferentes atores sociais cotidianos em um ordenamento específico entre classificações de nacionalidade, raça e classe. Para além de uma matéria jornalística representativa, o universo empírico investigado é formado por vivências etnográficas em observação participante e conversas informais com vendedores de rua senegaleses, integrantes da Associação dos Senegaleses de Porto Alegre, e habitués das calçadas em que trabalham os imigrantes informais. Em suma, no contexto analisado, proponho que a presença senegalesa no comércio de rua é comumente narrada como sintoma e causa naturais da ilicitude do ofício na cidade, um epifenômeno da economia informal cuja essência obscura, fechada e irresponsável é comparada a desses imigrantes negros vítimas individualizadas e, paralelamente, agentes de algo que escondem.
Claves para entender la política migratoria mexicana en tiempos de López Obrador
Authors: Calderón Chelius Leticia
Published: October 2021

El objetivo de este artículo es ofrecer una visión panorámica de la política migratoria de los primeros años de gobierno del presidente López Obrador en México. Mostrar que más allá de la retórica humanitaria con que arrancó su gobierno respecto a los inmigrantes, la visión gubernamental del ejecutivo no tiene en su mapa político a este sector, lo que explica las decisiones pragmáticas que dicho gobierno ha tomado en su difícil relación en el tema con Estados Unidos. Los múltiples hechos políticos que se han sucedido uno tras otro de manera vertiginosa en un corto tiempo en el poder, dada la decisión de cambiar de manera radical el tipo de gobierno que México ha tenido por años, explican a su vez, decisiones que van más allá del propio flujo migratorio.
Medication use in craniomandibular disorders and bruxing behavior individuals with and without dissociation
Authors: Molina Omar franklin franklin
Published: October 2021

O objetivo deste artigo foi  avaliar o uso de medicações diferentes  em pacientes com DTMs com e sem dissociação. Métodos: 111 indivíduos com DCMs  com dissociação, 36 sem dissociação e um grupo sem DCMs e sem dissociação foram avaliados  usando história dos sinais e sintomas, exame clinico,  palpação, queixa principal, critérios para DCMs e bruxismo e a escala  de experiências dissociativas de Bernstein e Putnan. Resultados: Os 3 grupos de estudo apresentaram história de uso de medicaçaõ. A quantidade no uso de medicação foi muito maior  no grupo com DCMs e com dissociation (p<0.02). Houve uma associação positiva e significante entre o uso de medicação e o valor em dissociaçaõ de acordo com a escala DES para dissociaçaõ. Concluimos que os indivíduos com dissociação e DCMs usam uma  variedade de medicamentos diferentes por motivos relacionados com a dor e com os distúrbios psicológicos.
Estudo da morfologia e da dureza por microindentação Vickers do ferro fundido branco hipoeutético e hipereutético
Authors: Souza Alessandro Oliveira de , Silva Everson Cruz da , Carneiro Frederico de Aquino , Jorge Joana Martins , Soares Rafael Iacillo , Cabral Ricardo de Freitas
Published: October 2021

O Ferro Fundido Branco é muito utilizado em peças em que se necessite elevada resistência à abrasão. Este tipo de ferro fundido não possui grafita livre em sua microestrutura. Neste caso o carbono encontra-se combinado com o ferro, resultando em elevada dureza e elevada resistência à abrasão. Praticamente não pode ser usinado. A peça deve ser fundida diretamente em suas formas finais ou muito próximo delas, a fim de que possa ser usinada por processos de abrasão com pouca remoção de material. É utilizado na fabricação de equipamentos para a moagem de minérios, pás de escavadeiras e outros componentes similares. Este trabalho tem como objetivo principal a caracterização microestrutural e a análise da Microdureza Vickers do Ferro Fundido Branco Hipoeutético e Hipereutético. As amostras foram preparadas metalograficamente, conforme norma ASTM E 407. Foram utilizados os seguintes equipamentos para análise da estrutura do material: Microscópio Óptico (MO), Microscópio Metalográfico Invertido, Microscópio Eletrônico de Varredura (MEV), Microdurômetro e Durômetro. Análises realizadas em Microscópio Óptico e Microscópio Metalográfico Invertido mostraram no Ferro Fundido Branco Hipoeutético uma microestrutura caracterizada de dendritas de perlita, áreas pontilhadas constituída de ledeburita e as áreas brancas constituídas de cementita, e no Ferro Fundido Branco Hipereutético uma microestrutura caracterizada de longos cristais de cementita sobre um fundo de ledeburita. Este resultado também foi analisado pelas imagens de alta resolução obtidas no MEV. Foram realizados testes de microdureza na escala Vickers com uma carga de indentação de 500gf. Os resultados mostram que, tanto na análise microestrutural, quanto na análise da microdureza, os valores claramente evidenciam as características do material estudado.