bluuebunny/crossref_metadata_2025 huggingface dataset:
Visual Flight into Instrument Meteorological Condition: A Post Accident Analysis
Authors: Ayiei Ayiei , Murray John , Wild Graham
Published: April 2020

The phenomenon of encountering instrument meteorological conditions (IMCs) while operating an aircraft under visual flight rules (VFRs) remains a primary area of concern. Studies have established that pilots operating under VFRs that continue to operate under IMCs remains a significant cause of accidents in general aviation (GA), resulting in hundreds of fatalities. This research used the Australian Transport Safety Bureau (ATSB) database, which contained a total of 196 VFR to IMC occurrences, from 2003 to 2019, with 26 having formal reports. An explanatory design was adopted, commencing with a qualitative study of the 26 occurrences with reports followed by a quantitative study of all 196 occurrences. Factors investigated included the locations and date of the occurrences, involved aircraft (manufacturer, model, type), pilot details (licenses, ratings, h, and medical), number of fatalities, and causal factors. Fisher’s exact tests were used to highlight significant relationships. Results showed occurrences were more likely to end fatally if (1) they involved private operations, (2) pilots only had a night VFR rating, (3) the pilot chose to push on into IMCs, (4) the pilot did not undertake proper preflight planning consulting aviation weather services, and (5) the pilot had more than 500 h of flight experience. Further results showed occurrences were less likely to end fatally if the meteorological condition was clouds without precipitation, if the pilot held a full instrument rating, or the pilot was assisted via radio. Analysis of the data using the Human Factors Analysis and Classification System (HFACS) framework revealed that errors and violations occur with slightly greater frequency for fatal occurrences than non-fatal occurrences. Quantitative analyses demonstrated that the number of VFR to IMC occurrences have not decreased even though initiatives have been implemented in an attempt to address the issue.
Optimization Analysis of the N Policy M/G/1 Queue with Working Breakdowns
Authors: Yen Tseng-Chang , Wang Kuo-Hsiung , Chen Jia-Yu
Published: April 2020

This paper deals with the N policy M/G/1 queue with working breakdowns. The supplementary variable and probability generating function techniques are implemented to develop the steady-state results. The stability condition of a stable queue, as well as several system performance measures, are also derived. A two-stage optimization method is employed to determine the optimal threshold N and the optimal joint values of two mean service rates until the stability constraint is satisfied. To demonstrate the effectiveness of two-stage optimization method, some numerical results are presented. Finally, we carry out sensitivity analysis for the expected cost function with numerical illustrations.
Present and Future Contributions of Reactor Experiments to Mass Ordering and Neutrino Oscillation Studies
Authors: Antonelli Vito , Miramonti Lino , Ranucci Gioacchino
Published: April 2020

After a long a glorious history, marked by the first direct proofs of neutrino existence and of the mixing between the first and third neutrino generations, the reactor antineutrino experiments are still well alive and will continue to give important contributions to the development of elementary particle physics and astrophysics. In parallel to the SBL (short baseline) experiments, that will be dedicated mainly to the search for sterile neutrinos, a new kind of experiments will start playing an important role: reactor experiments with a “medium” value, around 50 km, of the baseline, somehow in the middle between the SBL and the LBL (long baselines), like KamLAND, which in the recent past gave essential contributions to the developments of neutrino physics. These new medium baseline reactor experiments can be very important, mainly for the study of neutrino mass ordering. The first example of this kind, the liquid scintillator JUNO experiment, characterized by a very high mass and an unprecedented energy resolution, will soon start data collecting in China. Its main aspects are discussed here, together with its potentialities for what concerns the mass ordering investigation and also the other issues that can be studied with this detector, spanning from the accurate oscillation parameter determination to the study of solar neutrinos, geoneutrinos, atmospheric neutrinos and neutrinos emitted by supernovas and to the search for signals of potential Lorentz invariance violation.
COVİD-19 ve Gebelik
Authors: ASLAN Mehmet Musa , USLU Hilal , KÖSE Osman , CEVRİOĞLU Serhan , ÖZDEN Selçuk
Published: April 2020

Koronavirüsler önemli insan ve hayvan patojenleridir. 2019' un sonunda, Çin' in Hubei eyaletindeki bir şehir olan Wuhan' da yeni bir koronavirüs, pnömoni vakalarının nedeni olarak tanımlandı. Ardından hızla yayılarak Çin genelinde bir salgın ortaya çıktı ve dünyadaki diğer ülkelerde artan sayıda vakalar izlendi. Bunun üzerine şubat 2020'de Dünya Sağlık Örgütü, 2019 koronavirüs hastalığı anlamına gelen COVID-19 hastalığını tanımladı. COVID-19'a neden olan virüs, ciddi akut solunum sendromu koronavirüs 2 (SARS-CoV-2) olarak adlandırıldı. Koronavirüs enfeksiyonu dünyada yayılarak pandemiye yol açmıştır. Hızlı yayılması, tedavisinin olmaması ve ölümcül seyretmesi virüsün yarattığı etkiyi önemli kılmaktadır. Gebelerin, normal insanlara göre daha duyarlı olmaları nedeniyle, mortalite ve morbiditenin fazla olması bu enfeksiyonun klinik önemini arttırmaktadır. Gebelerde enfeksiyon ile ilgili olarak kısıtlı sayıda bilgi mevcuttur ve şimdilik yönetimin gebe olmayanlar gibi yapılması önerilmektedir. Bazı gebelerde fetal distres ve erken doğum görülmüştür. Anneden bebeğe geçtiğine dair bir kanıt henüz yoktur. Gebelik ve doğum yönetiminde, uygun şartlarda izolasyon, agresif enfeksiyon kontrol yönetimi, ilerleyici respiratuvar sorunlarda erken mekanik ventilasyon, oksijen tedavisi, fazla sıvı tedavisinden kaçınmak, sıkı fetal ve uterin monitörizasyon ön plana çıkmaktadır. Şüpheli yada enfekte gebelerin yönetiminin bu konuda yetkin bir multidisipliner ekip tarafından yapılması gerekmektedir.
A Model for COVID-19 Prediction in Iran Based on China Parameters
Authors: Zareie Bushra , Roshani Amin , Mansournia Mohammad Ali , Rasouli Mohammad Aziz , Moradi Ghobad
Published: April 2020

Background: The rapid spread of COVID-19 virus from China to other countries and outbreaks of disease require an epidemiological analysis of the disease in the shortest time and an increased awareness of effective interventions. The purpose of this study was to estimate the COVID-19 epidemic in Iran based on the SIR model. The results of the analysis of the epidemiological data of Iran from January 22 to March 24, 2020 were investigated and prediction was made until April 15, 2020. Methods: By estimating the three parameters of time-dependent transmission rate, time-dependent recovery rate, and timedependent death rate from Covid-19 outbreak in China, and using the number of Covid-19 infections in Iran, we predicted the number of patients for the next month in Iran. Each of these parameters was estimated using GAM models. All analyses were conducted in R software using the mgcv package. Results: Based on our predictions of Iran about 29000 people will be infected from March 25 to April 15, 2020. On average, 1292 people with COVID-19 are expected to be infected daily in Iran. The epidemic peaks within 3 days (March 25 to March 27, 2020) and reaches its highest point on March 25, 2020 with 1715 infected cases. Conclusion: The most important point is to emphasize the timing of the epidemic peak, hospital readiness, government measures and public readiness to reduce social contact.
ENHANCING CAR RIDE COMFORT USING A BALANCED CONTROLLER DESIGN FOR SEMI-ACTIVE SUSPENSION SYSTEM
Authors: Tấn Vũ Văn
Published: April 2020

Độ êm dịu chuyển động là một yếu tố quan trọng trong việc thiết kế ô tô. Có nhiều cách tiếp cận có thể được sử dụng để nâng cao đặc tính này, trong đó các nhà nghiên cứu Việt Nam và thế giới quan tâm đến hệ thống treo bán tích cực. Bài báo này giới thiệu phương pháp điều khiển cân bằng được sử dụng cho hệ thống treo bán tích cực với hai chiến lược điều khiển bao gồm bộ điều khiển cân bằng on-off và liên tục. Ý tưởng chính của chiến lược này là lực giảm chấn được điều khiển thay đổi sao cho có biên độ bằng với lực của lò xo nhưng ngược dấu. Điều này sẽ giảm gia tốc thẳng đứng của thân xe. Kết quả mô phỏng trên miền thời gian chỉ rõ rằng bằng cách sử dụng phương pháp điều khiển cân bằng, giá trị sai lệch bình phương trung bình của dịch chuyển thân xe, góc lắc dọc thân xe và gia tốc của chúng giảm từ 25% đến 50% so với hệ thống treo bị động.
EFFECT OF TEMPERATURE AND AIR-GAP WIDTH ON THE DESALINATION EFFICIENCY OF AIR-GAP MEMBRANE DISTILLATION MODULE
Authors: Sơn Lê Thanh , Dũng Nguyễn Trần , Điện Nguyễn Trần
Published: April 2020

Khử mặn nước biển là một giải pháp đầy hứa hẹn có thể được áp dụng để giải quyết vấn đề khan hiếm nước ngọt và nước sạch ở Việt Nam, đặc biệt là ở các vùng hải đảo và vùng sâu vùng xa. Gần đây, việc áp dụng các kỹ thuật chưng cất màng để khử mặn đang thu hút sự chú ý của nhiều nhà khoa học vì tính đơn giản, dễ vận hành và tiết kiệm năng lượng. Một mô-đun chưng cất màng đệm khí (AGMD) đã được chế tạo trên cơ sở màng PE mật độ thấp với kích thước 12 x 5 cm, độ xốp, chiều dày và kích thước lỗ trung bình lần lượt là là 85%, 76 µm, và 0,3 µm. Chiều dày của lớp đệm khí được kiểm soát bởi sự thay đổi số lượng tấm lưới nhựa trong buồng thấm. Kết quả thu được cho thấy chất lượng của dung dịch thấm qua màng tương đương với chất lượng của nước cất và nhiệt độ dòng cấp, chiều dày của lớp đệm khí ảnh hưởng mạnh đến hiệu quả khử mặn của mô-đun AGMD. Điều kiện tối ưu được tìm thấy là nhiệt độ dòng cấp là 60°C, chiều dày của lớp đệm khí là 5 mm, khi đó thông lượng thu hồi nước đạt 2,5 L.m-2.h-1.
SOLVABILITY OF THE NONLINEAR BOUNDARY VALUE PROBLEMS USING THE GREEN FUNCTION
Authors: Quy Ngô Thị Kim
Published: April 2020

Hàm Green có ứng dụng rộng rãi trong nghiên cứu các bài toán giá trị biên. Đặc biệt, hàm Green là công cụ quan trọng để chỉ ra sự tồn tại và duy nhất nghiệm của các bài toán. Trong bài báo này, chúng tôi nghiên cứu tính giải được của bài toán biên phi tuyến đối với phương trình vi phân có sử dụng hàm Green. Khác với cách tiếp cận của các tác giả khác, chúng tôi đưa bài toán ban đầu về phương trình toán tử đối với hàm vế phải. Xét hàm này trong miền bị chặn xác định, với một số điều kiện dễ kiểm tra chứng tỏ rằng toán tử này có tính chất co. Điều này bảo đảm bài toán gốc có nghiệm duy nhất.
A METHOD OF APPROXIMATION FOR A ZERO OF MAXIMAL MONOTONE OPERATOR IN HILBERT SPACE
Authors: Hoài Phạm Thị Thu , Hoa Nguyễn Thị Thúy , Thắng Nguyễn Tất
Published: April 2020

Trong bài báo này chúng tôi đưa ra một phương pháp lặp hiện mới giải bài toán bất đẳng thức biến phân trên tập không điểm của toán tử đơn điệu cực đại trong không gian Hilbert. Bằng việc sử dụng hai toán tử giải của một toán tử đơn điệu tại mỗi bước lặp, chúng tôi chứng minh sự hội tụ mạnh của phương pháp dưới điều kiện suy rộng đặt lên tham số.
A CASE STUDY OF INTERCULTURAL COMMUNICATION: SMALL TALK AT DIFFERENT STAGES OF RELATIONSHIP BETWEEN A VIETNAMESE AND AN AMERICAN
Authors: Hoài Hoàng Thị Thu , Linh Nguyễn Thùy , Hà Nguyễn Thị Hồng
Published: April 2020

Trong xu hướng hội nhập hiện nay, công dân Việt Nam có cơ hội tiếp xúc, giao thiệp xã hội và làm việc với những người nói tiếng Anh. Điều này dẫn tới việc trang bị cho sinh viên đại học ở Việt Nam các kiến thức và kỹ năng ngôn ngữ cần thiết là cực kì quan trọng. Ở Việt Nam hiện nay có khá nhiều các nghiên cứu về phương pháp giảng dạy ngoại ngữ nhằm giúp người học đạt được chuẩn đầu ra về ngôn ngữ đặt ra bởi bộ Giáo dục và Đào tạo; tuy nhiên, các khía cạnh văn hóa xã hội của ngôn ngữ chưa được quan tâm nhiều. Nghiên cứu này là một nghiên cứu trường hợp trong lĩnh vực giao tiếp liên văn hóa tiến hành nhằm tìm hiểu ba đặc điểm: Mức độ riêng tư, mức độ trang trọng và mức độ trực tiếp trong giao tiếp xã hội của một cá nhân người Mỹ và người Việt Nam. Nghiên cứu này tìm hiểu giao thiệp giữa các cá nhân thuộc các nền văn hóa khác nhau: Sự phát triển của giao tiếp và mối quan hệ của nó với các yếu tố cá nhân và văn hóa. Kết quả nghiên cứu đã khẳng định lại các lý thuyết về giao tiếp liên văn hóa: Khi mối quan hệ giữa các cá nhân thuộc các nền văn hóa khác nhau phát triển đến từng giai đoạn nhất định thì ngôn ngữ của họ cũng thay đổi theo.
AN ANALYSIS ON POLITENESS STRATEGIES USED BY TEACHERS AND STUDENTS AT SCHOOL OF FOREIGN LANGUAGES, THAI NGUYEN UNIVERSITY
Authors: Giang Bùi Thị Hương , Quỳnh Đàm Thị , Hà Nguyễn Dương
Published: April 2020

Nghiên cứu được thực hiện để phân tích các chiến lược lịch sự được sử dụng bởi các giáo viên và sinh viên thuộc Khoa Ngoại ngữ - Đại học Thái Nguyên. Nghiên cứu mô tả các loại chiến lược lịch sự được sử dụng bởi giáo viên và các loại chiến lược lịch sự được sử dụng bởi sinh viên trong các lớp học tiếng Anh. Nghiên cứu này là nghiên cứu mô tả định tính và định lượng. Đối tượng nghiên cứu là hai giáo viên tiếng Anh và bốn mươi sáu sinh viên của hai lớp tiếng Anh tại Khoa Ngoại ngữ - Đại học Thái Nguyên. Để thu thập dữ liệu, nhà nghiên cứu đã sự dụng cách ghi lại video và phỏng vấn. Lý thuyết về chiến lược lịch sự của Brown & Levinson và Q. Nguyễn cũng được sử dụng trong nghiên cứu này. Kết quả của nghiên cứu cho thấy có bốn chiến lược chính được sử dụng bởi các giáo viên và sinh viên trong các lớp học tiếng Anh tại Khoa Ngoại ngữ - Đại học Thái Nguyên, đó là chiến lược lịch sự công khai, lịch sự dương tính, lịch sự âm tính và chiến lược lịch sự không công khai, trong đó, chiến lược lịch sự dương tính chi phối việc sử dụng chiến lược lịch sự của giáo viên cũng như học sinh trong quá trình giảng dạy.
THE IMPACT OF AUGMENTED REALITY ON LEARNERS’ MOTIVATION IN A READING CLASSROOM AND RELATED PROBLEMS
Authors: Linh Lê Thị Khánh
Published: April 2020

Tương tác thực tế đã trở thành một trong những ứng dụng công nghê mới nhất trong giáo dục, đặc biệt là trong dạy và học ngôn ngữ. Mặc dù có những lợi thế nổi bật, tương tác thực tế vẫn tồn tại nhiều bất cập. Vì vậy nghiên cứu này được thực hiện nhằm tìm hiểu xem sinh viên đánh giá như thế nào về tác động của tương tác thực tế đối với động lực học tập của mình trong lớp học kỹ năng đọc, và các khó khăn các em gặp phải với tương tác thực tế. Nghiên cứu tập trung trả lời hai câu hỏi nghiên cứu về động lực học tập của sinh viên trước và sau khi tương tác thực tế được dùng trong lớp và những trở ngại khi học với tương tác thực tế. Số liệu được thu thập thông qua câu hỏi khảo sát trước và sau khi tương tác thực tế được dùng trong lớp và phỏng vấn. Kết quả khảo sát trước và sau khi áp dụng tương tác thực tế trong lớp học cho thấy sau khi được học với tương tác thực tế, động lực học tập của sinh viên đã tăng lên rõ rệt. Đồng thời kết quả khảo sát cuối giai đoạn và phỏng vấn chỉ ra các khó khăn khi sử dụng tương tác thực tế trong lớp, đặc biệt là vấn đề kỹ thuật. Hy vọng rằng, những kết quả này sẽ giúp giáo viên và sinh viên sử dụng tương tác thực tế hiệu quả hơn trong lớp học của mình.
Use of Big-Data Analytics with the Interactive Advertisement for Product/Service Representation towards its Customers
Authors: Saluja HarshmitKaur , Yadav Vinod Kumar , Mohapatra K.M.
Published: April 2020

On the one hand, big-data analytics has brought revolution in the predictive modeler by enabling the complex data sets getting structured. On the other hand, the interactive advertisement has changed the complete scenario of the advertising sector by making advertisements content structured in such a way that it is customer-centric. The paper helps to widen the view to explore the growing urge of customization technique in advertising sector with interactive enablers. The paper further examines that how interactive advertisement and big-data has helped to represent product/service from the view of a customer and also improved the product/service performance. In order of study, exhaustive literature reviews resulting in three hypothesis are developed to take on the above-mentioned concerns.
RELATO DE EXPERIÊNCIA: UTILIZAÇÃO DO PROJETO TERAPÊUTICO SINGULAR COMO ESTRATÉGIA DE PRODUÇÃO DE UM CUIDADO INTEGRAL
Authors: Rosa Urbano Sousa Costa Joana , Ávila Garcia Carolina , Moisés de Lima Júnior Erivar
Published: April 2020

Após a criação do SUS, iniciou-se uma mudança no modelo de visão em saúde, no qual o modelo hospitalocêntrico foi dando lugar a uma nova perspectiva, com ênfase na assistência básica e o cuidado integral em saúde. Dessa maneira, o Projeto Terapêutico Singular (PTS) surge como uma estratégia para um cuidado integrativo do usuário e comunidade, que se baseia na união de proposições de condutas terapêuticas para um indivíduo levando em consideração o ser como todo em sua singularidade. O objetivo do trabalho é discutir o uso do PTS como ferramenta de construção de um cuidado integral, por meio da experiência em uma unidade de saúde da família. A metodologia utilizada é o relato de experiência do estudante. Como resultados observou-se que para construção do PTS foi importante compreender a situação de vida do ponto de vista da paciente e de cada membro da equipe, pois assim conseguiu-se propor condutas mais adequadas para o contexto daquela paciente. Logo, conclui-se que o PTS se mostrou uma ferramenta de grande utilidade no cuidado a paciente do relato de experiência, pois trouxe uma visão integrada dela que vai além do tradicional modelo biomédico hospitalocêntrico, além de que sua implantação vem motivar a reavaliação desse modelo. Devendo, portanto, haver mais debates, reflexões e problematizações acerca do assunto por parte de todos os integrantes do sistema de saúde, para que, dessa forma, seja possível cada vez mais, melhorar a assistência à saúde no Brasil.

Palavras chave: Assistência integral à saúde. Assistência primária a saúde. Estratégia de saúde da família. Estudantes.
EDUCAÇÃO EM SAÚDE PARA TERCEIRA IDADE: UMA EXPERIÊNCIA SOBRE ANSIEDADE
Authors: Leandra Ferreira dos Santos Taís , Davi Carlos de Moura Pedro , Leticia Fernandes Feitoza Shakira , Tavares Silveira Silva Rafael
Published: April 2020

Através deste Relato de Experiência, pretende-se compartilhar o aprendizado de estudantes do 2º período de Enfermagem e Psicologia da Faculdade Evolução Alto Oeste Potiguar (FACEP) na execução do projeto de pesquisa e extensão intitulado “Estilo de vida na Terceira Idade: um estudo no sertão nordestino”, ação esta que ocorreu no dia 23 de setembro de 2019 com idosos do município de São Francisco do Oeste/RN com o objetivo de estimular a discussão sobre ansiedade e seus diferentes agravantes, além de compartilhar conhecimento com os idosos. Através de dinâmicas e uma roda de conversa foi estabelecido momentos de discussões e diálogos para que fosse possível a interação e troca de conhecimento. Os idosos foram participativos e demonstraram já possuir um certo domínio sobre o tema discutido, com alegria e disposição realizaram todas as atividades sugeridas e todas as discussões apresentadas. De modo que, as atividades de Promoção e Educação em Saúde são de fundamental importância para informação e melhoria na qualidade de vida desse grupo etário.

Palavras chave: Educação em Saúde. Envelhecimento. Qualidade de Vida.
The structural composition of soils of the South-East of the Central Black-Earth Zone with different patterns of use (on the example of The Kamennaya Steppe)
Authors: Y.I. Cheverdin , T.V. Titova , V.A. Bespalov
Published: April 2020

The study of the structural state of chernozems with patterns of use was done at V.V. Dokuchaev Research Institute of Agriculture of the Central Black-Earth Zone in 2019. The study was done under the conditions of agrocenoses and undisturbed ecosystems. Soils of naturally preserved biocenosis were represented by ordinary chernozems (automorphic) or segregation chernozems, soils of arable land – ordinary chernozems (automorphic) or segregation agro-chernozems. The experimental plots of arable land with slope variants were represented by sections of slopes of the Eastern exposure with a slope of up to 3°. The soil cover of experimental arable plots was a combination of chernozems such as topsoil segregation, migration-micellar with a small part of zoogenic turbocharged soil. The soil structure was determined by the method of N.I. Savvinov. A significant reduction in the share of agronomically valuable aggregates in soils influenced to intensive agrogenic impacts was found. Confirmation of this phenomenon was a significant decrease of the coefficient of soil structure: 3.2 on arable land, 14.0 – on abandoned land. There was a threefold decrease in the amount of the soil aggregates under the conditions of agrogenic impacts in spite of there was the small amount of silty part of the soil aggregates. The meso-aggregates of soil with size from 2 to 5 mm were related to the most vulnerable component of soil agronomically valuable structure. There were the most noticeable decrease of the relative content of meso-aggregates of soil under agricultural impacts (along with lumpy particles).
Research of water-physical properties of irrigated meadow-gray soils (on experienced plot) under the conditions of Azerbaijan
Authors: M.G. Mustafayev , P.CH. Qazıyeva
Published: April 2020

Water-physical properties of the soil are not constant, they often are changed under the influence of natural conditions and agrotechnical measures. Studies show that water-physical properties directly affect the life and growth of plants. In this regard, the main tasks are to study the changes in water and physical properties of the soil under various crops in irrigated areas and to develop the systems of agromeliorative measures. As a result of researches the water-physical properties of irrigated meadow-gray soils of the experimental site at the Salyan plain were studied: physical clay – 48.2...56.79%, density of solid phase – 2.62...2.73 g/cm3, density of dry soil – 1.22...1.46 g/cm3, total moisture capacity – 31.86...43.80%, soil porosity – 46.52...53.44 %, CaCO3 –11.11...14.96%, pH – 8.2...8.6, SO4 in gypsum – 0.077...0.899%, the ratio of absorbed bases – 12.27...15.96 milligram equivalents. Researched soils have a weak and medium degree of water permeability (Kt = 5.51...8.83 cm/h the Kostyakov equation). The traditional and modern methods of irrigation (furrowing, sprinkling, drip, etc.), application of fertilizers (organic, mineral and micro fertilizers, local fertilizers, silt deposits of river waters, etc.) are recommend as agrotechnical measures in accordance with preliminary study of ratio of salts in soil.
Aggressive Central Giant Cell Granuloma: A Case Report
Authors: Hammad Jahangir , Ayoub Muhammad , Kashaf-ud-doja Tariq  , Farhat Gul Babar
Published: April 2020

Central giant cell granuloma (CGCG) is a benign non odontogenic lesion of jaw that may show aggressive behavior. It is classified as aggressive and non-aggressive lesion on the basis of biological behavior and radiographic features. Central giant cell lesion is more frequent in children and young adult before the age of 30 years with female predilection, with characteristic radiological and histopathological features. Here we present a case of a 35 years old female with clinical and radiological diagnosis of central giant cell lesion in posterior mandible confirmed by histopathology. A surgical approach with regular follow up is the treatment of choice in most of the cases.

Key Words: Calcitonin, Corticosteroid, Curettage, Enucleation, Giant cell lesion
Shear Strength Parameters of Cement Stabilized Amorphous Peat of Various Water Additive Ratios at Different Natural Moisture Contents under Consolidated Undrained Triaxial Test
Authors:   Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan 94300, Malaysia, Rahmi A , Taib SNL ,   Ascociate Professor, Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan 94300, Malaysia., Lecturer F Sahdi, ,   Department of Civil Engineering, Universiti Malaysia Sarawak, Samarahan 94300, Malaysia., Mapplati MJ ,   CREAM-CIDB CoPS Unimas, Ghani MK ,   CREAM-CIDB CoPS Unimas
Published: April 2020

Peat is a problematic soil which has a low shear strength characteristic. Addition of cement can improve the properties and strength of peat soil. This paper presents the findings of the shear characteristic of cement stabilized amorphous peat under consolidated undrained (CU) triaxial test. Three different natural moisture contents of peat which are 1210%, 803% and 380%, were stabilized using cement with water to additive (W/A) ratio of 2.0 and 3.0. CU triaxial test was conducted to the specimens after cured for 90 days. The shear parameters and characteristics were investigated towards the change of W/A ratio of the samples with different moisture contents. The result shows that the stabilized peat specimens exhibited ductile behavior and were sensitive to the over consolidation. The total and effective cohesion (ccu, c′) of the stabilized peat were found to be greater at W/A ratio of 2.0 compared to W/A ratio of 3.0, and greater at lower initial moisture content specimens. The total and effective friction angles (φcu, φ′) are ranged from 14o to 27o and 36o to 47o consecutively and found to be increased upon the increase of W/A ratio except for the specimens with moisture content 1210% and 803% in term of total friction angle.
Load Frequency Control Optimization using PSO Based Integral Controller
Authors:   Department of Instrumentation Engineering in D. V.V. P.F’s Dr. VithalraoVikhePatil College of Engineering, Ahmednagar., Dhawane Vandana , Bichkar Dr. Rajankumar S. ,   Principal in Vidya Pratishtan’s Kamalnayan Bajaj Institute of Engineering and Technology, Baramati, Pune.
Published: April 2020

This paper presents Automatic Generation Control (AGC) of a power system using integral controller. In the present day power systems, it has become absolutely essential to maintain the quality of the power generated indicating the need of a robust system that can handle parameter uncertainties neglecting disturbances. Although,extensive research has been done in thisarea, design of an efficient and robust system still remains one of the important issues that need to be addressed. Hence in this paperan integral controller has been designed for a single-area thermal power system without reheat turbine. The optimum controller gain is obtained by Particle Swarm Optimization (PSO) based on Integral of Absolute Error (IAE) and Integral of Square Error (ISE) criterion. The second part of the investigation includes robustness testing of the designed controller against different load conditions and plant parameter variations. The results obtained are compared to those obtained by other control methodologies presented in the recent literature. The results of the simulation validate the superiority of the approach in terms of improvement in the transient response and robustness to plant parameter variations.
Predicting Service Outages using Tweets
Authors:   Department of CS &SE , Andhra University , Vishakapatnam , Andhra Pradesh , India ., Yadwad* Sunita A , Kumari Dr V. Valli ,   Department of CS &SE , Andhra University , Vishakapatnam , Andhra Pradesh , India
Published: April 2020

Every user of the internet has high aspirations on its reliability, efficiency, productivity and in many other aspects of the same. Providing an uninterrupted service is of prime importance .The amount of data along with enormous number of residual traces is increasing rapidly and significantly. As a result, analysis of log data has profoundly influenced many aspects of researcher’s domains. Social media being integral part of the Internet, real time blogging services like Twitter are widely used due to their inherent nature of depicting social graph, propagating information and entire social dynamics. Content of tweets are of major interest to researchers as they reflect individuals experiences, real time events. Researchers have explored several applications of tweet analysis. One such application is detecting service outages through a myriad of messages posted by users regarding unavailability. Simple techniques are enough to extract key semantics from tweets as they are faster alerts for warning about service unavailability. Similarly, the outage mailing lists are text-based messages which are rich in semantic information about the underlying outages. Researchers find it a great challenge to automatically parse and process the data through NLP and text mining for service outage detection. An extensive study was conducted, aiming to explore the research directions and opportunities on log analysis, tweet analysis and outage mailing list analysis for the purpose of detecting and predicting service outages. A systematic- frame work is also articulated with a focus on all stages of analytics and we deliberately discussed potential research challenges & paths in the above said analysis. We introduce three major data analysis methods for diagnosing the causes of service failures , detecting service failures prematurely and predicting them. We analyze Syslogs (contain log data generated by the system) for detecting the cause of a failure by automatically learning over millions of logs and analyze the data of a social networking service (namely, Twitter and outage mails) to detect possible service failures by extracting failure related tweets, which account for less than a percent of all tweet in real time with high accuracy. Paper is an effort not only to detect outages but also to forecast them using twitter analysis based on time series and neural network models. We further propose a log analysis model for the same.
Corporate Social Responsibility in India: with Special focus in North East India
Authors:   Lecturer, Department of Commerce, Darrang College, Tezpur, Assam,, Das Dr. Bipul Kumar
Published: April 2020

Corporate Social Responsibility has become a mainstream global business strategy in recent years and a large number of firms in the world issue numerous activities as a part of it. India is one of the first among few countries in the world to have a CSR act and the first to bring about legislation to implement CSR activities.The Government of India has made two significant interventions in the field of CSR-- in 2010, it made compulsory for public as well as private enterprises to spend 2 to 5 percent of their net profit on CSR; and it amended the Companies Act, 1956 that made compulsory provision for CSR under Section 135 in 2013. In this context this article is an attempt to discuss the progress in CSR initiatives in India over the years.
Secure Key Agreement Protocol for Multi-Drone Communication
Authors:   TIFAC-CORE in Cyber Security, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Coimbatore, India., P* Varshini , V. Lakshmy K. ,   TIFAC-CORE in Cyber Security, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Coimbatore, India.
Published: April 2020

Unmanned Aerial Vehicles (UAV), or Drone communication, are developing areas of research that can be used in fields of military, hospital or agriculture. Drone communication keeps up associations among drones and a ground station with a satisfactory information rate for sustaining ongoing transmissions. The communication is imparted between one another through RF. This communication is over the air and it should be encrypted. This guarantees an attacker can't comprehend the caught data. The ongoing research areas focus on efficiently encrypting the channel to make it secure and reducing the dependency on GCS for key generation. This paper proposes a key trade protocol for secure drone to drone communication. Normally in a drone communication, the communication between the Ground Control Station(GCS) and the drones are encrypted utilizing the URANUSLink protocol. The drone to drone communication occurs through the ground station which takes a lot of communication time and resources. Additionally, if an immediate drone to drone communication is built up it is significantly decoded or sets aside the need for effective and secure key generation functions. To overcome the previously mentioned issue the proposed protocol defeats the computation and storage issues by utilizing parameters like Drone ID(DID), Mission ID(MID), Timestamp and Nonce alongside hashing capacities for the key age and communication process. The proposed protocol consists of three phases: i)Registration- the new drones are assigned with DID and MID after registering with the GCS ii)Group-Key Generation- the key is generated using hash functions and iii) Communication Establishment- the keys are exchanged and verified before the communication starts. This protocol guarantees forward secrecy, reverse secrecy and insurance from attacks like eavesdropping, spoofing, replay, and physical capture attacks. AVISPA is utilized for the security examination of the protocol.
Improved S-AF and S-DF Relaying Schemes using Machine Learning based Power Allocation over Cascaded Rayleigh Fading Channels
Authors: Alghorani Yahia , pierre samuel
Published: April 2020

We investigate the performance of a dual-hop intervehicular

communications (IVC) system with relay selection

strategy. We assume a generalized fading channel model, known as cascaded Rayleigh (also called n*Rayleigh), which involves the product of n independent Rayleigh random variables. This channel model provides a realistic description of IVC, in contrast to the conventional Rayleigh fading assumption, which is more suitable for cellular networks. Unlike existing works, which mainly consider double-Rayleigh fading channels (i.e, n = 2); our system model considers the general cascading order n; for which we derive an approximate analytic solution for the outage probability under the considered scenario. Also, in this study we propose a machine learning-based power allocation

scheme to improve the link reliability in IVC. The analytical and simulation results show that both selective decode-and-forward (S-DF) and amplify-and-forward (S-AF) relaying schemes have the same diversity order in the high signal-to-noise ratio regime. In addition, our results indicate that machine learning algorithms can play a central role in selecting the best relay and allocation of transmission power.
Metody diagnostyki laboratoryjnej COVID-19
Authors: Michalski Aleksander , Bielawska-Drózd Agata , Cieślik Piotr , Makowski Przemysław , Kocik Janusz
Published: April 2020

W międzynarodowej literaturze od 2003 r. pojawiały się liczne publikacje dotyczące identyfikacji wirusa SARS-CoV. Metaanaliza badań wykazała efektywność stosowania reakcji czasu rzeczywistego polimerazy łańcuchowej z odwrotną transkrypcją do wykrywania koronawirusów. Autorzy opisują ryzyko ekspozycji laboratoryjnej związane z wirusem SARS-CoV-2. Nowy wirus stanowi istotne zagrożenie dla personelu medycznego i diagnostów laboratoryjnych. W ciągu prac diagnostycznych zidentyfikowano następujących kilka obszarów ryzyka biologicznego. W pracy pokazano drogę do ustanowienia standardu identyfikacji SARS-CoV-2 wśród innych koronawirusów oraz aktualny sposób realizacji testów molekularnych. Testy serologiczne są uzupełnieniem RT-PCR w określonych przypadkach. Zaproponowano algorytm diagnostyczny z użyciem kombinacji stosowania tych testów, zwiększający szansę wykrycia zakażeń koronawirusem SARS-CoV-2 u chorych objawowych jak i bezobjawowych, objętych nadzorem epidemiologicznym, kwarantanną i izolacją. Testy serologiczne mogą być również przydatne na potrzeby prowadzenia dochodzeń epidemiologicznych oraz do badań retrospektywnych pandemii COVID-19.
Rozpoznanie i leczenie łagodnych przypadków COVID-19 w warunkach domowych – wyzwania i ryzyka
Authors: Kocik Janusz , Pinkas Jarosław
Published: April 2020

Większość zakażonych SARS-CoV-2 będzie przechodzić chorobę skąpoobjawowo. Jednocześnie wydaje się, że są oni wysoce zakaźni. W sezonie chorób rzekomogrypowych COVID-19 jest jedną z wielu jednostek chorobowych, które mogą powodować podobne objawy. Osoby oczekujące na segregację i lekarską kwalifikację do leczenia w wyznaczonych podmiotach leczniczych ulegają dodatkowemu ryzyku zakażenia wirusem SARS-CoV-2 poprzez kontakt z innymi pacjentami i personelem medycznym. Przy dużej fali zachorowań wyznaczone szpitale powinny zajmować się jedynie pacjentami z rzeczywiście narastającą niewydolnością oddechową. Pacjenci z łagodnymi objawami powinni być kwalifikowani do pobrania materiału diagnostycznego, obserwacji i leczenia w izolacji, w domu. Jednakże, ze względu na wysoką zakaźność i ciężki przebieg COVID-19 u części chorych należy zastosować reguły ograniczenia transmisji wirusa do domowników i społeczności. Autorzy, za Światową Organizacją Zdrowia, przedstawiają zasady opieki nad pacjentem COVID-19 z łagodnymi objawami w warunkach domowych.
Trainees’ views of physician workforce policy in Quebec and their impact on career intentions
Authors: Hallet Julie , Saad Nathalie , Rousseau Mathieu , Lauzier François
Published: April 2020

Background: The physician workforce in Quebec is regulated by a government-controlled plan. Many specialty trainees expressed concerns about securing a position. Our objective was to analyze physicians’ employment issues in Quebec and their impact on residents’ training in specialty programs.Methods: We distributed a web-based self-administrated survey to all Quebec residents training in specialty programs to capture data about residents’ ability to find employment, career plans and perceptions regarding the workforce policy. Three groups were considered: graduates, non-graduating senior residents, and junior residents.Results: The overall response rate was 41.5% (985/2372). 47.3% of graduates did not have a position two months before finishing their training. Among residents without a position, 27.1% of graduates intend to leave Quebec, and 19.6% to complete a fellowship to postpone their start in practice. Overall, 77.9% of respondents believed there are not enough job opportunities for the number of trainees.Conclusion: Quebec specialty residents experience significant difficulties obtaining a position in the province and perceive that there are not enough job opportunities, which impacts their career plans and could drive them to complete a fellowship or plan to practice outside the province. Trainees' experience in finding employment needs to be considered in planning the physician workforce.
Internal Medicine residents use heuristics to estimate disease probability
Authors: Phang Sen , Ravani Pietro , Schaefer Jeffrey , Wright Bruce , Mclaughlin Kevin
Published: April 2020

Background: Training in Bayesian reasoning may have limited impact on accuracy of probability estimates. In this study, our goal was to explore whether residents previously exposed to Bayesian reasoning use heuristics rather than Bayesian reasoning to estimate disease probabilities. We predicted that if residents use heuristics then post-test probability estimates would be increased by non-discriminating clinical features or a high anchor for a target condition.Method: We randomized 55 Internal Medicine residents to different versions of four clinical vignettes and asked them to estimate probabilities of target conditions. We manipulated the clinical data for each vignette to be consistent with either 1) using a representative heuristic, by adding non-discriminating prototypical clinical features of the target condition, or 2) using anchoring with adjustment heuristic, by providing a high or low anchor for the target condition.Results:  When presented with additional non-discriminating data the odds of diagnosing the target condition were increased (odds ratio (OR) 2.83, 95% confidence interval [1.30, 6.15], p = 0.009). Similarly, the odds of diagnosing the target condition were increased when a high anchor preceded the vignette (OR 2.04, [1.09, 3.81], p = 0.025).Conclusions: Our findings suggest that despite previous exposure to the use of Bayesian reasoning, residents use heuristics, such as the representative heuristic and anchoring with adjustment, to estimate probabilities. Potential reasons for attribute substitution include the relative cognitive ease of heuristics vs. Bayesian reasoning or perhaps residents in their clinical practice use gist traces rather than precise probability estimates when diagnosing.
Pediatric faculty and residents’ perspectives on In-Training Evaluation Reports (ITERs)
Authors: Patel Rikin , Drover Anne , Chafe Roger
Published: April 2020

Background: In-training evaluation reports (ITERs) are used by over 90% of postgraduate medical training programs in Canada for resident assessment.  Our study examined the perspectives of faculty and residents in one pediatric program as a means to improve the ITER as an evaluation tool.Method: Two separate focus groups were conducted, one with eight pediatric residents and one with nine clinical faculty within the pediatrics program of Memorial University’s Faculty of Medicine to discuss their perceptions of, and suggestions for improving, the use of ITERs.Results:  Residents and faculty shared many similar suggestions for improving the ITER as an evaluation tool.  Both the faculty and residents emphasized the importance of written feedback, contextualizing the evaluation and timely follow-up.  The biggest challenge appears to be the discrepancy in the quality of feedback sought by the residents and the faculty members’ ability to do so in a time effective manner.  Others concerns related to the need for better engagement in setting rotation objectives and more direct observation by the faculty member completing the ITER.Conclusions: The ITER is a useful tool in resident evaluations, but a number of issues relating to its actual use could improve the quality of feedback which residents receive.
Análisis axiológico de la construcción y validación de un instrumento documental edumétrico
Authors: Paucca Gonzales Nelson , Rafayle Cuadra Rusbel Jhon , Andrade Torre Judy Andrea
Published: April 2020

La investigación educativa, presenta ciertos sesgos en lo que respecta a la construcción de un instrumento documental de tipo edumétrico y la validación. Esta se debe, a la falta de toma de conciencia axiológica de parte de algunos investigadores, tesistas, asesores y jueces expertos que tienen la obligación de validar el instrumento formulado a través de los ítems. En función al acápite enunciado en líneas anteriores se formula el siguiente objetivo; elucidar la falta de praxis de la ética y moral de las personas involucradas en el proceso de la construcción y validación de un instrumento edumétrico. El análisis del artículo científico corresponde al método analítico – hermenéutico en lo que respecta al enfoque cualitativo  y al método estudios instrumentales para el caso del enfoque cuantitativo. El método hermenéutico ha permitido analizar de manera rigurosa el papel que cumplieron las personas mencionadas anteriormente. También, se ha establecido las diferencias de manera categórica entre la construcción de un instrumento de tipo psicométrico y el de tipo edumétrico, esta última se construye a falta de los antecedentes de la investigación a desarrollar y su validez obedece a las teorías formuladas en función a las variables y dimensiones. Finalmente se concluye que las personas involucradas en la construcción edumétrica carecen de la praxis axiológica.
Decontamination of Tritium Contaminated Surfaces Using Strippable Polymeric Gel
Authors: Chiper Diana , Tuta Catalin Stelian , Manea Simona Eugenia , Bubueanu George Gabriel
Published: April 2020

The purpose of the present paper consists in finding a more efficient and less expensive decontamination method for surfaces contaminated with Tritium-labelled compounds, being able to provide information for nuclear field specialists. This paper studies the polymeric hydrogel DeconGel, presenting the methods and facilities used, as well as the obtained results from the experiments and tests. The decontamination factor of DeconGel type 1108 for the analysed surfaces (contaminated with a mixture of tritium labelled compounds) can take values in the range of 76%-93%, while in the case of DeconGel type 1102 the values of the decontamination factor for the analysed surfaces (contaminated with tritiated oil) can vary between 76% and 98%, results far greater than the ones obtained with the classical method of wet wiping. Because the results were more than satisfying, this paper concludes by recommending the implementation of this new method.
ARCH Replacement in Acute Aortic Dissection Type a in Normothermia
Authors: Stiru Ovidiu , Geana Roxana Carmen , Tulin Adrian , Ioan Raluca Gabriela , Pavel Victor , Balan Daniela Gabriela , Iliescu Vlad Anton
Published: April 2020

The purpose of this case presentation is to present a simplified surgical technique when in a patient with acute aortic dissection type A (AAD), aortic arch, and ascending aorta is completely replaced without circulatory arrest. A 67-year old male was presented in our institution with severe chest and back pain at 12 h after the onset of the symptoms. Imaging studies by 3D contrast-enhanced thoracic computed tomography (CT-scan) and transesophageal echocardiography (TEE) revealed ascending aortic dissection towards the aortic arch, which was extending in the proximal descending aorta. We practiced emergency median sternotomy and established cardiopulmonary bypass (CBP) between the right atrium and the right femoral artery with successive cross-clamping of the ascending and descending aorta below the origin of the left subclavian artery (LSA). In normothermic condition without circulatory arrest and with antegrade cerebral perfusion, we replaced the ascending aorta and aortic arch with a four branched Dacron graft. Patient evolution was uneventful, and he was discharged, after fourteen days from the hospital. At a one-year follow-up, 3D CT-scan showed no residual dissection with a well-circulated lumen of the supra-aortic arteries. Using the described surgical approach, CPB was not interrupted, the brain was protected, and hypothermia was no used. This approach made these surgical procedures shorter, and known complications of hypothermia and circulatory arrest are avoided.Acute aortic dissection aortic type A, total arch replacement, normothermia
Study on the Enzymatic Activity of the Soil in Racos Protected Area from Brasov
Authors: Avasilcai Liliana , Bireescu Geanina , Vieriu Madalina , Bibire Nela , Crivoi Florina , Cioanca Oana , Morariu Ionela-Daniela
Published: April 2020

Soil enzymes are vital for maintaining soil fertility and health, as they play a crucial role in initiating and maintaining the biogeochemical cycles of the nutrients, in providing fundamental support for fertility for healthy plant growth, and for protecting the environment by degrading pollutant molecules. The aim of the study was the characterization of the soil from the Racos volcano area situated in the southern part of the East Carpathian Mountains, from the point of view of the enzymatic activities of invertase, urease, catalase and dehydrogenase. The values of the index of the total enzymatic activity � TEI, and of the geometric mean of the enzymatic activities - GME, were calculated using the experimental results of the determinations of the enzymatic activity of invertase as μg glucose/g soil/h, of urease as μg NH4+-N/g soil/h, of dehydrogenase as μg triphenylformazan/g soil/h, and of catalase as mL 0,02M KMnO4 solution/g soil/h.
Analysis of Inclusion Complexes of Clotrimazole and Differently Substituted α, β and γ Cyclodextrins by NMR Spectroscopy
Authors: Kelemen Hajnal , Noszal Bela , Orgovan Gabor
Published: April 2020

Clotrimazole, a widely used imidazole-type antifungal agent and its cyclodextrin complexes were studied. Stoichiometries, structures and stability constants of the inclusion complexes with fourteen different cyclodextrin derivatives were characterized using NMR spectroscopy as primary technique. The cyclodextrin complexes were found to be of high stability (logK ] 2). 2D ROESY NMR spectra revealed the formation of isomeric complexes with every cyclodextrin studied. The highest stability constant was observed with sulfobutylated β-CD, and interestingly enough the heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin showed the lowest stability.