bluuebunny/crossref_metadata_2025 huggingface dataset:
The enhancement of sensitivity and response times of PDMS-based capacitive force sensor by means of active layer modification
Authors: Siangkhio Yasumin , Rangkasikorn Adirek , Tammarugwattana Narin , Kayunkid Navaphun , Jessadaluk Sukittiya , Rahong Sakon , Wirunchit Supamas , Nukeaw Jiti
Published: March 2021

In this work, sensitivity and response times of PDMS-based capacitive force sensors are enhanced via the modifications of the PDMS layer. Two modifying approaches are proposed; (i) change PDMS’s (elastomer:curing agent) ratio and (ii) adding conductive polymer PEDOT:PSS into the PDMS layer. The change of PDMS (elastomer:curing agent) ratio from (10:1) to (30:1) increases the sensitivity from 0.4 ± 0.08 to 0.72 ± 0.23 kPa−1 (+80%) but it does not significantly affect the response/recovery times. In addition, by adding 1% wt. of PEDOT:PSS to PDMS (30:1), the further increment of sensitivity from 0.72 ± 0.23 to 1.44 ± 0.17 kPa−1 (+100%) and the shorter response time from 1.59 ± 0.02 to 0.45 ± 0.03 s (−72%) are observed. The mechanical and electrical studies reveal that the change of PDMS (elastomer:curing agent) ratio and the adding of PEDOT:PSS to PDMS layer result in the modification of PDMS’s deformability and the increase of charge transportation, leading to the enhancement of sensing characteristics of the sensors.
Visualization of solvation structure on Li4Ti5O12(111)/ ionic liquid-based electrolyte interface by atomic force microscopy
Authors: Bao Yifan , Kitta Mitsunori , Ichii Takashi , Utsunomiya Toru , Sugimura Hiroyuki
Published: March 2021

Ionic liquids (ILs) have been intensively studied as one promising candidate for an electrolyte in lithium ion batteries (LIBs). Structural analysis of interfaces between an IL-based electrolyte and a LIB electrode would provide beneficial information for improving LIBs. In this study, we investigated the interfacial structures between an IL, 1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl)imide (EMI-TFSI), and a spinel-type lithium titanate (Li4Ti5O12) electrode in the presence and absence of Li-salt by frequency modulation atomic force microscopy (FM-AFM) utilizing a quartz tuning fork sensor. Solvation structures on the interface were successfully visualized by two-dimensional frequency shift mapping. Electrochemical impedance spectroscopy measurement was also performed to measure the rate of Li+-ion insertion/extraction on the interface and we found that the interfacial ion-transfer may prevent the formation of layered solvation structure.
Electrospray propelled by ionic wind in a bipolar system for direct delivery of charge reduced nanoparticles
Authors: Dau Van T. , Vu Trung-Hieu , Tran Canh-Dung , Nguyen Thanh Viet , Nguyen Tuan-Khoa , Dinh Toan , Phan Hoang-Phuong , Shimizu Kazunori , Nguyen Nam-Trung , Dao Dzung V.
Published: March 2021

We present a conceptual design to generate and deliver nanoparticles in one unique system based on electrohydrodynamic atomisation (EHDA) without the restriction of the collector. The present EHDA bipolar configuration consists of a capillary nozzle and a pin, both act as emitters and as the reference electrodes of each other. Under an applied voltage, the capillary nozzle sprays droplets while the pin generates ion wind via corona discharge. During spraying process, droplets’ charge is significantly reduced by interacting with counter ions and propelled away from the electrodes by the momentum of ion winds accumulated from corona discharge. Thus, the present technique can yield promising applications in effective respiratory delivery of nanomedicine.
Pengetahuan Terhadap Perilaku Ibu Dalam Pemberian ASI Ekslusif di Klinik Permata Ibu
Authors: Aini Inayatul
Published: March 2021

Rendahnya pengetahuan terhadap pemberian ASI Eksklusif berdampak pada perilaku ibu. Hasil studi pendahuluan terhadap 10 ibu yang memiliki anak yang berusia 0-6 bulan terdapat 7 ibu yang tidak memberikan ASI Eksklusif karena bekerja, sibuk dan kurang mengerti tentang ASI Eksklusif dikarenakan tidak pernah mendapatkan informasi tentang ASI Eksklusif.Tujuan penelitian ini adalah mengidentifikasi pengaruh pengetahuan terhadap perilaku ibu dalam pemberian ASI Eksklusif.

Desain penelitian ini menggunakan survey variabel independennya adalah pengetahuan, variabel dependennya adalah perilaku ibu dalam pemberian ASI Eksklusif. Populasinya adalah ibu yang memiliki bayi usia 6-12 bulan di Klinik Permata Ibu sebanyak 51 orang. Sampling yang digunakan adalah simple random sampling. Data ini diambil dengan menggunakan kuesioner.

Hasil penelitian terhadap 45 responden didapatkan pengetahuan ibu dalam pemberian ASI Eksklusif hampir setengahnya mempunyai pengetahuan kurang, perilaku ibu memberikan ASI Eksklusif sebagian besar pasif. Penelitian ini menggunakan uji spearman rho dengan nilai p < 0,05. Hasil uji statistik diperoleh nilai p = 0,041 < 0,05.

Kesimpulannya adalah ada pengaruh pengetahuan terhadap perilaku ibu dalam pemberian ASI Eksklusif dengan nilai signifikasi 0,041.
Foreign experience of the paradigm of medium-term budget planning and its application in Ukraine
Authors: Zhuk Inna , Petrychuk Svitlana
Published: March 2021

The article examines the essence of medium-term budget planning, its tasks and stages of development in world, in particular European practice. The expediency of using a multi-year approach in the budget process and its advantages and disadvantages are proved. The peculiarities of medium-term budget planning of its function and methods of application in Ukraine are grounded. The toolkit and key elements to be implemented in the medium-term planning system according to the recommendations of the European Commission are described. The peculiarities of implementation of the program-target method as the most effective form of budgeting both at the state and regional levels are characterized. The directions of improvement of strategic financial management by means of introduction of budgetary medium-term planning in budgetary practice of Ukraine are determined. It is proved that the significance and urgency of medium-term budget planning in the budget process is quite significant, and most importantly, it is economically justified from the standpoint of all participants in budget relations. It is necessary to understand and note that the best international, in particular, European experience, should be a diagnostic indicator, not a template used to implement reforms. The main task is to develop procedures and mechanisms that will allow sector ministries and departments to plan expenditures based on reasonable assumptions about available budget resources and the state - to ensure transparency, flexibility and the possibility of operative adjustment of budget items taking into account changes in the budget policy of the country.
Application of Agricultural Waste for the Adsorption of Pharmaceutical Pollutants in Wastewater: A Review
Authors: Dada E.O
Published: March 2021

Modernization and growth in population have contributed to the continuous release of new and emerging chemical compounds (such as pharmaceuticals) into water sources. The importance of pharmaceuticals can never be overemphasized due to their great potential and effectiveness in the body system. However, improper management of their effluents which eventually ends up in the water in our environment has always been an issue of great concern. This led to the need for the purification of the contaminated water (wastewater). Over time, many methods of wastewater purification have been employed in the treatment of the wastewater, but yet, adsorption has been found and established to be an optimum option for the task due to its effectiveness, availability, affordability, and durability. Adsorption is a separation technique that takes place on the surface of a material or through a component called an adsorbent, and the effectiveness of this method is a function of the adsorbent capacity, contact time, temperature, and other related parameters. For adsorbent preparation, many materials have been considered and proven to be active and effective. However, in this paper, synthesizing agricultural wastes as the adsorbent in the adsorption of pharmaceutical effluents is reviewed with references, to further attest to its prominence in adsorption.
Link Budget Analysis for Reconfigurable Smart Surfaces in Aerial Platforms
Authors: ALFATTANI SAFWAN , Jaafar Wael , Hmamouche Yassine , Yanikomeroglu Halim , Yongacoglu Abbas
Published: March 2021

Non-terrestrial networks, including Unmanned Aerial Vehicles (UAVs), High Altitude Platform Station (HAPS) and Low Earth Orbiting (LEO) satellites, are expected to have a pivotal role in the sixth generation wireless networks. With their inherent features such as flexible placement, wide footprint, and preferred channel conditions, they can tackle several challenges in current terrestrial networks. However, their successful and widespread adoption relies on energy-efficient on-board communication systems. In this context, the integration of Reconfigurable Smart Surfaces (RSS) into aerial platforms is envisioned as a key enabler of energy-efficient and cost-effective deployments of aerial platforms. Indeed, RSS consist of low-cost reflectors capable of smartly directing signals in a nearly passive way. We investigate in this paper the link budget of RSS-assisted communications under the two discussed RSS reflection paradigms in the literature, namely the specular and the scattering reflection paradigm types. Specifically, we analyze the characteristics of RSS-equipped aerial platforms and compare their communication performance with that of RSS-assisted terrestrial networks, using standardized channel models. In addition, we derive the optimal aerial platforms placements under both reflection paradigms. The obtained results provide important insights for the design of RSS-assisted communications. For instance, given that a HAPS has a large RSS surface, it provides superior link budget performance in most studied scenarios. In contrast, the limited RSS area on UAVs and the large propagation loss in LEO satellite communications make them unfavorable candidates for supporting terrestrial users. Finally, the optimal location of the RSS-equipped platform may depend on the platform’s altitude, coverage footprint, and type of environment.
Gravity Balancing Flexure Spring Mechanisms for Shoulder Support in Assistive Orthoses
Authors: Tschiersky Martin , Hekman Edsko E. G. , Herder Just L. , Brouwer Dannis M.
Published: March 2021

Passive shoulder supports show large potential for a wide range of applications, such as assisting activities of daily living and supporting work-related tasks. The rigid architectures of currently available devices, however, may pose an obstacle to finding designs that offer low protrusion and close-to-the-body alignment. This study explores the use of mechanisms that employ a flexible element which connects the supported arm to an attachment at the back and acts as energy storage, transmission and part of the load bearing structure. Based on the synthesis method explained in this paper, we conducted a large scope investigation into possible flexure-based mechanism topologies. Many potential designs were discovered and are presented, categorized and compared. Two promising designs were developed into prototypes that were built and tested on a dedicated test bench. These mechanisms reduce the necessary moment to lift the arm by more than 80 % throughout 85 % of the range of motion, while staying within 18 cm and 10 cm distance from the body, respectively. Our study indicates that, due to its lower protrusion and interface loads, a design with a tapered flexure connecting the upper arm via a hinge to a spring loaded slider at the back offers the most promising solution.
Energy-Efficient Deployment of a Non-Orthogonal Multiple Access Unmanned Aerial System
Authors: Babu Nithin , Papadias Constantinos B. , Popovski Petar
Published: March 2021

In this work, we propose a methodology for the energy-efficient placement of an unmanned aerial system (UAS) deployed to collect data from a set of ground user equipments (UEs). The data-communication between the UEs and the UxNB, a radio access node carried by an unmanned aerial vehicle (UAV), of the UAS follows a non-orthogonal multiple-access (NOMA) scheme; in which all the UEs share the same time and frequency resources. The receiver removes the inter-UE interference from the co-channel UEs through joint implementation of a powerreduction technique at the UEs and the successive interference cancellation (SIC) at the receiver. Firstly, a new energy-efficiency metric, area energy efficiency (AEE) representing the total area covered by a UxNB per Watt-Hour (Wh) of energy consumed, is introduced. Then, the optimal hovering altitude of the UxNB that maximizes the AEE is determined using the proposed algorithm. Numerical evaluations show that the obtained solution using the proposed algorithm matches the globally optimal solution, and the proposed NOMA scheme prevails over an equivalent orthogonal multiple access (OMA) scheme, in terms of the AEE.
All Your Fake Detector Are Belong to Us: Evaluating Adversarial Robustness of Fake-news Detectors Under Black-Box Settings
Authors: Ali Hassan , Khan Muhammad Suleman , AlGhadhban Amer , Alazmi Meshari , Alzamil Ahmad , AlUtaibi Khaled , Qadir Junaid
Published: March 2021

Analyzing fake-news detectors under adversarial threat using the Text-Attack Library for a number of model hyper-parameters and attack settings.
Preliminaries on the Accurate Estimation of the Hurst Exponent Using Time Series
Authors: Millán Ginno , Osorio-Comparán Román , Lefranc Gastón
Published: March 2021

This article explores the required amount of time series points from a high-speed computer network to accurately estimate the Hurst exponent. The methodology consists in designing an experiment using estimators that are applied to time series addresses resulting from the capture of high-speed network traffic, followed by addressing the minimum amount of point required to obtain in accurate estimates of the Hurst exponent. The methodology addresses the exhaustive analysis of the Hurst exponent considering bias behaviour, standard deviation, and Mean Squared Error using fractional Gaussian noise signals with stationary increases. Our results show that the Whittle estimator successfully estimates the Hurst exponent in series with few

points. Based on the results obtained, a minimum length for the time series is empirically proposed. Finally, to validate the results, the methodology is applied to real traffic captures in a high-speed computer network.
Status Anemia dan Skor Diet Quality Index (DQI) pada Remaja Putri di SMP Ibnu Aqil, Bogor
Authors: Alfiah Elma , Yusuf Andi Mukramin , Yusuf Andi Mukramin , Puspa Amalina Ratih , Puspa Amalina Ratih
Published: March 2021

Anemia is a global health problem, which occurs in both developed and developing countries. The Indonesian Basic Health Research showed that the prevalence of anemia in adolescent girls aged 15-24 years was 48.9% in 2018. This study aimed to analyze the anemia status and diet quality index (DQI) of adolescent girls. The study was a cross-sectional conducted at Ibnu Aqil Junior High School, Ciomas District, Bogor from March to September 2019. The number of students involved as respondents in this study was 84 students. The results show that the prevalence of anemia in adolescent girls was 16.7%, with the mean Diet Quality Index (DQI) score indicating a low diet quality category (55.9 out of 100). There was no significant relationship between hemoglobin levels and DQI scores, but several indicators such as variations in protein source groups, fiber adequacy, iron adequacy, calcium adequacy, total fat moderation, and saturated fat moderation on adolescent girls who suffered anemia showed lower values than with those who didn’t suffer from anemia. The high prevalence of anemia could be caused by poor diet quality aspects, thus diet-based intervention should be the strategic solution to solve this problem. The high prevalence of anemia could be caused by poor diet quality aspects, thus diet-based intervention should be the strategic solution to solve this problem.

Keyword - Adolescence, Anemia, Diet quality, DQI, Supplementation
Some Myers-Type Theorems and Comparison Theorems for Manifolds with Modified Ricci Curvature
Authors: Kaboye Issa A. , Harouna Mahamane Mahi , Bazanfaré Mahaman
Published: March 2021

In this paper we establish some new compactness criteria for complete Riemannian manifolds with Bakry-\'Emery Ricci curvature bounded below. These results improve or generalize previous ones obtained by H. Tadano [6], J. Wan [7], I.A. Kaboye and M. Bazanfar\'e [3]. We also prove a volume comparison theorem for such manifolds.
Instagrammed body craze and its effects on Pakistani young university female students
Authors: Qamar Dr. Ayesha , butt Urwa Mahmmod , Manzoor Dr. Samia
Published: March 2021

The purpose of studying Instagram's influence is to evaluate the concept of a perfectly toned body that does not exist, as it has been promoted on Instagram. The image-based social networking site, i.e., Instagram, has become steadily popular among youth, especially young girls. Young girls use Instagram to spruce up images posted on it. A quantitative survey is used, and questionnaires are filled through an online examination. A convenient sampling method is used for data collection. The study included 204 young girls aged 18-25 from different universities in Islamabad. Social Comparison Theory helped to understand the influence of Instagram on changing body image and its disorder.Confirmatory Factor Analysis (CFA) and Structural Equation Modeling (SEM) is used through Amos. The analysis revealed that the relationship between the use of Instagram and body dissatisfaction is positive and significant. The more the use of Instagram, the higher the body dissatisfaction among young girls. The relationship between Instagram usage and eating disorders had some correlation. It revealed that young girls who use Instagram excessively adopt eating disorders. Moreover, the study analyzed that there are more physical health symptoms identifies when Instagram usage is increased. The relationship between physical health symptoms and the use of Instagram was positive and useful.
Gambaran D-Dimer Dan Limfosit Pada Pasien Terkonfirmasi Covid-19 Di RS Haji Jakarta
Authors: Permana Atna , Yari Cut Ervinar , Aditya Alaika Kurnia
Published: March 2021

Penyakit Virus Corona tahun 2020 merebak virus baru coronavirus jenis baru (SARS-CoV-2) yang penyakitnya disebut Coronavirus disease 2019 (Covid-19). Virus ini ditemukan di Wuhan, China pertama kali dan Lebih dari 30,6 juta kasus Covid 19 dan 950.000 kematian telah dilaporkan ke WHO per 2 Maret 2020.   Penelitian ini bertujuan untuk mengetahui gambaran D-dimer dan limfosit pada pasien terkonfirmasi Covid-19 di RS Haji Jakarta. Desain penelitian ini adalah cross sectional (potong lintang). Sebanyak tiga puluh pasien terkonfirmasi Covid-19 yang diambil menggunakan data sekunder berupa rekam medis di Laboratorium RS Haji Jakarta. Berdasarkan hasil pemeriksaan pada pasien terkonfirmasi Covid-19 terhadap 30 sampel pasien, didapatkan laki-laki sebanyak 17 orang (56,7%) dan perempuan sebanyak 13 orang (43,3%). Berdasarkan hasil pemeriksaan D-dimer didapatkan hasil nilai normal D-dimer sebanyak (40%) sedangkan hasil abnormal D-dimer sebanyak (60%). Berdasarkan hasil pemeriksaan limfosit didapatkan hasil nilai limfosit menurun sebanyak (43,4%), untuk hasil nilai limfosit normal sebanyak (50%), sedangkan nilai limfosit meningkat sebanyak (6,6%). Kata Kunci          : D-dimer, Limfosit, Covid-19
Um olhar para a desigualdade educacional em matemática no Brasil: Para além das metas do IDEB
Authors: Carvalho Palheta Franciney , Rodrigues de Lucena Isabel Cristina , Ribeiro Tavares Heliton
Published: March 2021

Este artigo tem por objetivo problematizar sobre o alcance de metasdoIDEB, em alguns estados brasileiros, frente a grande desigualdade de desempenho em Matemática. O estudo foi feito com base na análisedos microdados da Prova Brasil de 2017, mostrando os resultados obtidos pelo IDEB para cada estado da federação e a desigualdade de desempenho em Matemática. Os dados indicam o 5o ano do Ensino Fundamental apresentam a menor desigualdade de desempenho em Matemática na Prova Brasil. À medida que ocorre o avanço para o 9o ano do Ensino Fundamental e 3o ano do Ensino Médio, há cada vez menos estudantes na categoria ADEQUADO, em contraste com aumento de estudantes na categoria INSUFICIENTE. Portanto, é importante se olhar com atenção para os rankings do IDEB entendendo a relevância que assumem como indicador educacional com propósito administrativo, bem como os possíveis equívocos gerados quando compreendido como principal indicador educacional.
Business Process Reengineering as the Current Best Methodology for Improving the Business Process
Authors: Zaini Zuraida , Saad Aslina
Published: March 2021

Currently, most companies or organizations can select a number of methodologies to improve their business processes, which include Six Sigma, Lean Thinking, Lean Six Sigma, Business Process Reengineering, Total Quality Management, Kaizen and Poka-Yoka. However, selecting an appropriate methodology has to be guided by the organization’s objectives. In this respect, the BPR is one of the best methodologies that can help organizations to ensure the continuity of their businesses so they will remain relevant for a long time. More importantly, the BPR can help members of organizations to rethink about their existing practices such as to introduce significant improvements to their business process. Based on a literature review, the researchers carried out a comparative analysis on four leading methodologies, namely BPR, Six Sigma, Lean Thinking, and Kaizen. The comparison of the methodologies were based on 11 aspects, namely the concept, effect, use of information technology, focus, involvement of workers, degree of change, level of risk, creation of a study, model, duration, and cost. In addition, the researchers elaborated the six phases of the implementation of BPR. The comparative analysis revealed that the BPR was the best among the four methodologies analysed, as it could help radically and holistically improve the overall business process of an organization. Thus, organizations that need such a change in their business processes can adopt the BPR as the most appropriate methodology than can help bring the intended improvements to their workplace.
Álgebra Lineal y Geometría Analítica en carreras de Ingeniería: reporte de investigaciones
Authors: Sabatinelli Pablo Agustín , Llanos Viviana Carolina , Otero María Rita
Published: March 2021

In this paper, 168 researches on Linear Algebra (LA) and Analytic Geometry (AG) at the university are analyzed, with the objective of knowing if these researches deal with the phenomenon of the split between this knowledge and to investigate about the main topics that guide the research on these subjects. An analysis is made using qualitative techniques obtaining a categorization in an inductive way. The results allow us to conclude that the split between LA and AG that operates in the study programs is not addressed by the researchers. Most focus on describing and analyzing students' difficulties with this knowledge, and among the proposals for teaching, the incorporation of software stands out. Only a minority consider, from an epistemological point of view, the benefits of a hybrid teaching between LA and AG.
Percepción de estudiantes universitarios sobre su formación académica en matemática y estadística
Authors: Reyes Guillén Ivett , Fonseca Córdoba Socorro , Gómez López Miguel Ángel
Published: March 2021

This article shows the results of research to analyze the perceptions of students of the bachelor’s degree in Economics, about learning mathematics, teaching processes, and understanding the Spanish language in which the classes are taught. The methodology used was descriptive, non-experimental, cross-cutting and field. As results, students perceive mathematics as tense; but attractive, with teaching processes that are sometimes not noticeably clear. Successful teaching-learning in mathematics and the disciplines that derive from it are a challenge regardless of academic level. Studies reflecting the relationship of this situation to variables such as language barriers are considered necessary.
Three-Wheeled Omnidirectional Robot Localization in RFID-Tag Environments using UFIR Filtering
Authors: Ortega-Contreras Jorge A. , Shmaliy Yuriy S. , Andrade-Lucio Jose A.
Published: March 2021

This paper describes a way to improve the indoor navigation of mobile robots using radio frequency identification (RFID) technology. A net of RFID tags is deployed in the navigation space. A measurement system measures distances from the tags to the robot with in the presence of the firstorder Markov-Gauss colored measurement noise (CMN) and is combined with a digital gyroscope to measure the robot heading. To increase the localization accuracy, the Kalman filter (KF) and unbiased finite impulse response (UFIR) modified for CMN are used. It is shown that the navigation system developed is more accurate than the basic one employing the standard KF and UFIR filter
Ηyper-sinh-Convolutional Neural Network for Early Detection of Parkinson’s Disease from Spiral Drawings
Authors: Parisi Luca , Zaernia Amir , Ma Renfei , Youseffi Mansour
Published: March 2021

Modern developments in the state-of-the-art open-source activation functions for Convolutional Neural Networks (CNNs) have broadened the selection of benchmark activations for Deep Learning (DL)-aided classification. Nevertheless, achieving discrimination of non-linear input image data in CNN is still not straightforward and it is unclear how such novel activation functions can have translational applications with tangible impact. hyper-sinh, made freely available in TensorFlow and Keras, was demonstrated as a benchmark activation function on five (N=5) datasets in its ground-breaking paper. Measuring the value from deploying this activation in a specific application is pivotal to supply the required evidence of its performance on real-life supervised DL-based image classification tasks. In this study, a CNN was for the first time combined with hypersinh to aid early detection of Parkinson’s Disease (PD) from discriminating pathophysiological patterns extracted from spiral drawings. Thus, the hyper-sinh activation was deployed to maximise the separability of the input features from spiral drawings via automated pattern recognition. We demonstrate the accuracy and reliability of hyper-sinh-CNN to aid early diagnosis of PD, evaluated against other gold standard activation functions, including the recent Quantum ReLU (QReLU) and the modified Quantum ReLU (m-QReLU) that solved the ‘dying ReLU’ problem for the first time in the literature of DL. Two (N=2) benchmark datasets from the database of the Botucatu Medical School, São Paulo State University in Brazil, scaled to be in 28 by 28 pixels as the MNIST benchmark data, were used to discriminate between input image patterns of 158 subjects (53 healthy controls and 105 patients with PD) from spirals drawn on graphics tablets. Overtraining was avoided via early stopping and the models were developed and tested in TensorFlow and Keras (Python 3.6). The supervised model (hyper-sinh-CNN) could detect early Parkinson’s Disease with 81% and 91% classification accuracy from the two datasets respectively (F1-scores: 73% and 91% correspondingly). Furthermore, the model achieved high sensitivity (81% and 91%). Thus, this study validates the application of hyper-sinh to aid real-life supervised DL-based image classification, in particular early diagnosis of PD from spiral drawings.
Hospitalidad digital: un concepto para la educación del siglo XXI
Authors: Henriquez Juan Alejandro
Published: March 2021

La hospitalidad digital nace como una aproximación reflexiva desde la hermenéutica, presentándose como una propuesta para una avanzada era digital, pero que no logra aún romper las barreras propias de la desigualdad, evidenciada en la aún existente brecha digital. Presentamos esta definición desde una reflexión ética, respetuosa de la diversidad y con enfoque de derechos humanos. La hospitalidad digital, esperamos pueda incorporarse desde el sistema pre-escolar al terciario, donde los y las docentes desarrollen esta competencia que favorece la innovación educativa y que busca reducir la brecha y el analfabetismo digital presentes en el siglo XXI.
DEVELOPMENT OF STUDENTS ' ORAL SPEECH IN GERMAN LANGUAGE WITH THE HELP OF PREZI PROGRAM
Authors:   Senior teacher, Department of” Western languages", Saidova Makhsudakhon Abbasovna ,   , Tashkent State University of Oriental Studies
Published: March 2021

In today's fast-evolving era, science and technology are growing at a rapid pace. The delivery of students-students using new innovative pedagogical Technologies is one of the main requirements of today's education. In particular, the process of passing foreign language lessons requires the use of advanced pedagogical technologies, interactive, innovative methods, communicative media.
THE ROLE OF COMMERCIAL BANKS IN THE SECURITIES MARKET
Authors:   Business Coach of the Human Resources Department, Joint-stock Commercial Bank ", Mamatov Akmaljon Anvarjonovich ,   Agrobank"
Published: March 2021

This article describes the role of commercial banks in the securities market, as well as the economic significance of investment transactions with securities, types of securities, a brief analysis and ways of development. It also provides recommendations on the position of commercial banks in the securities market and the development of the economy.
LEXICO-SEMANTIC PROPERTIES OF PRONOUNS OF THE UZBEK LANGUAGE
Authors:   Senior Lecturer, Jizzakh State Pedagogical Institute, Ibragimova Latofat
Published: March 2021

The article provides information on the types of pronouns in accordance with their semantic and grammatical features. The division of personal pronouns into two is illustrated by examples. The article reveals the lexical and semantic features of pronouns.
The effect of the progressive muscle relaxation combined withs lavender aromatherapy on insomnia of hemodialysis patients
Authors: Rosdiana Ida , Cahyati Yanti
Published: March 2021

disorder in hemodialysis patients, which will cause a decrease in quality of life. Aromatherapy combined with progressive muscle relaxation are expected to increase the effects of relaxation on the patient so that the patient's sleep quality can improve optimally.Objective: The study aimed to investigate the effect of the progressive muscle relaxation combined with lavender aromatherapy on insomnia among patients undergoing hemodialysis. Material and Methods: The design of this study included a quasi-experiment with a pretest-posttest control group approach. The sample selection was performed using a consecutive sampling technique and involved 50 respondents, divided into two equal control and study group. Patients in study group recommended to do progressive muscle relaxation at least four times per week for three weeks and were told to drop two – three drops lavender aromatherapy on a pillow 30 minutes before bedtime at least 4 nights per week for three weeks. The control group recommended to do muscle relaxation and daily routine care at least four times per week for three weeks. Results: The results showed that both study and control groups were equal in terms of demographics, and scores of insomnia at the baseline. There no significant difference between the mean insomnia scores of two group before intervention, while the difference was statistically significant after the intervention. The mean insomnia scores were lower in study group than in the control group.Conclusion: Progressive muscle relaxation and lavender aromatherapy were effective in decreasing insomnia scores among patients undergoing hemodialysis.
Skin Lesion Classification Based on Deep Convolutional Neural Networks Architectures
Authors: Saeed Jwan , Zeebaree Subhi
Published: March 2021

Skin cancer is among the primary cancer types that manifest due to various dermatological disorders, which may be further classified into several types based on morphological features, color, structure, and texture. The mortality rate of patients who have skin cancer is contingent on preliminary and rapid detection and diagnosis of malignant skin cancer cells. Limitations in current dermoscopic images, including shadow, artifact, and noise, affect image quality, which may hamper detection effort. Attempts to overcome these challenges have been made by analyzing the images using deep learning neural networks to perform skin cancer detection. In this paper, the authors review the state-of-the-art in authoritative deep learning concepts pertinent to skin cancer detection and classification.
IoT Provisioning QoS based on Cloud and Fog Computing
Authors: Samann Fady Esmat Fathel , Zeebaree Subhi R. M. , Askar Shavan
Published: March 2021

The wide-spread Internet of Things (IoT) utilization in almost every scope of our life made it possible to automate daily life tasks with no human intervention. This promising technology has immense potential for making life much easier and open new opportunities for newly developed applications to emerge. However, meeting the diverse Quality of Service (QoS) demands of different applications remains a formidable topic due to diverse traffic patterns, unpredictable network traffic, and resource-limited nature of IoT devices. In this context, application-tailored QoS provisioning mechanisms have been the primary focus of academic research. This paper presents a literature review on QoS techniques developed in academia for IoT applications and investigates current research trends. Background knowledge on IoT, QoS metrics, and critical enabling technologies will be given beforehand, delving into the literature review. According to the comparison presented in this work, the commonly considered QoS metrics are Latency, Reliability, Throughput, and Network Usage. The reviewed studies considered the metrics that fit their provisioning solutions.
METHOD OF TESTING THE READINESS OF MEANS OF TRANSPORT WITH THE USE OF SEMI-MARKOV PROCESSES
Authors: Borucka Anna
Published: March 2021

In the analysis of the readiness of means of transport, the Markov and semi-Markov processes are particularly applicable, allowing for the description of the usage process over long periods of time, determination of indicators of the exploitability and readiness of the used set of objects, as well as simulation of long-term forecasts of the usage process results. The studies presented in the literature usually concern the theoretical side of the matter, mainly the construction of formal models of the process of changing the operating states of a vehicle. Less attention is paid to the empirical side, especially with regard to the actual conditions of use. Examples of experimental observations presented in the literature most often concern individual cases. This paper lists selected irregularities and presents an example of a study of a real transport system based on semi-Markov processes.
The Stellar Content of H72.97-69.39, a Potential Super Star Cluster in the Making
Authors: Andersen Morten , Zinnecker Hans , Hirschauer Alec S. , Nayak Omnarayani , Meixner Margaret
Published: March 2021

Young massive clusters and super star clusters (SSCs) represent an extreme mode of star formation. Far-infrared imaging of the Magellanic Clouds has identified one potential embedded SSC, HSO BMHERICC J72.971176-69.391112 (H72.97-69.39 in short), in the southwest outskirts of the Large Magellanic Cloud. We present Gemini Flamingos 2 and GSAOI near-infrared imaging of a 3′ × 3′ region around H72.97-69.39 in order to characterize the stellar content of the cluster. The stellar content is probed down to 1.5 M
⊙. We find substantial dust extinction across the cluster region, extending up to A

K
of 3. Deeply embedded stars are associated with ALMA-detected molecular gas suggesting that star formation is ongoing. The high spatial resolution of the GSAOI data allows identification of the central massive object associated with the 13CO ALMA observations and detection of fainter low-mass stars around the H30α ALMA source. The morphology of the molecular gas and the nebulosity from adjacent star formation suggest they have interacted covering a region of several parsecs. The total stellar content in the cluster is estimated from the intermediate- and high-mass stellar content to be at least 10,000 M
⊙, less than R136 with up to 100,000 M
⊙ within 4.7 pc radius, but places it in the regime of an SSC. Based on the extinction determination of individual stars we estimate a molecular gas mass in the vicinity of H72.97-69.39 of 6600 M
⊙, suggesting more star formation can be expected.
Deciphering the Deep Origin of Active Regions via Analysis of Magnetograms
Authors: Dikpati Mausumi , McIntosh Scott W. , Chatterjee Subhamoy , Norton Aimee A. , Ambroz Pavel , Gilman Peter A. , Jain Kiran , Munoz-Jaramillo Andres
Published: March 2021

In this work, we derive magnetic toroids from surface magnetograms by employing a novel optimization method, based on the trust region reflective algorithm. The toroids obtained in this way are combinations of Fourier modes (amplitudes and phases) with low longitudinal wavenumbers. The optimization also estimates the latitudinal width of the toroids. We validate the method using synthetic data, generated as random numbers along a specified toroid. We compute the shapes and latitudinal widths of the toroids via magnetograms, generally requiring several m's to minimize residuals. A threshold field strength is chosen to include all active regions in the magnetograms for toroid derivation, while avoiding non-contributing weaker fields. Higher thresholds yield narrower toroids, with an m = 1 dominant pattern. We determine the spatiotemporal evolution of toroids by optimally weighting the amplitudes and phases of each Fourier mode for a sequence of five Carrington Rotations (CRs) to achieve the best amplitude and phases for the middle CR in the sequence. Taking more than five causes “smearing” or degradation of the toroid structure. While this method applies no matter the depth at which the toroids actually reside inside the Sun, by comparing their global shape and width with analogous patterns derived from magnetohydrodynamic (MHD) tachocline shallow water model simulations, we infer that their origin is at/near the convection zone base. By analyzing the “Halloween” storms as an example, we describe features of toroids that may have caused the series of space weather events in 2003 October–November. Calculations of toroids for several sunspot cycles will enable us to find similarities/differences in toroids for different major space weather events.
AT2020caa: A Type Ia Supernova with a Prior Outburst or a Statistical Fluke?
Authors: Soraisam Monika , Matheson Thomas , Lee Chien-Hsiu
Published: March 2021

We recently discovered an extragalactic transient, AT2020caa, from the Zwicky Transient Facility alert stream using the community broker ANTARES. This transient apparently exhibited two outbursts within one year (between 2020 and 2021). Based on a decade-long historical light curve of the candidate host galaxy, we rule out activity from the galaxy nucleus to explain these outbursts. The measured peak magnitudes (assuming the known spectroscopic redshift of the candidate host galaxy) put AT2020caa in the realm of thermonuclear supernovae (SNe) or luminous core-collapse SNe. A handful of the latter are known to show prior outbursts (POs), thought to be linked to mass loss in massive stars. Using Gemini/GMOS, we obtained a spectrum of the current outburst that shows it to be a Type Ia supernova. We examine the nature of AT2020caa’s PO seen a year earlier and conclude that it is likely a separate SN within the same galaxy.
Dust in Comet 67P/Churyumov–Gerasimenko: Interrelation between in situ Findings by Rosetta and Ground-based Polarimetry
Authors: Zubko Evgenij , Videen Gorden
Published: March 2021

We present a comprehensive model of the ground-based polarization observations from comet 67P/Churyumov–Gerasimenko using two different apertures on its apparitions of 1982 and 2016. Our modeling suggests that the dust composition viewed within the two apertures is the same, but that they have different size distributions, with smaller particles more concentrated in the innermost coma. The best fits to the measurements using the smallest aperture are obtained using a dust size distribution similar to the Rosetta findings. Furthermore, the model parameters providing the best fit to polarimetric observations using the large aperture appear remarkably consistent with what was previously inferred in other comets. This represents an attempt to reconcile the Rosetta results with ground-based observations.
Path2Integrity Learning Cards & Handbook for Teacher and Trainers: S-Series
Authors: Prieß-Buchheit Julia , Häberlein Lisa
Published: March 2021

Do you want to teach your students how to do research, as well as help them understand how important reliable research is for society? This handbook accompanies the Path2Integrity learning cards (P2ILC) on five topics (https://www.path2integrity.eu/ri-materials) and introduces you to an easy and fun learning programme that has been evaluated in over 25 training sessions. The Path2Integrity learning cards S-series is especially designed for secondary school students and undergraduates. Through this series, students learn how research results must be produced in order to be reliable and thus useful for society.
Field surveys along habitat gradients revealed differences in herpetofauna assemblage in Margalla Hills National Park, Islamabad, Pakistan
Authors: Rais Muhammad , Ahmed Jamal , Naveed Aiman , Batool Arooj , Shahzad Aqsa , Bibi Razia , Sajjad Anum
Published: March 2021

This study was conducted to see whether herpetofaunal assemblage differed amongst hiking trails, undisturbed forest and urban areas within the Margalla Hills National Park, Islamabad Capital Territory, Pakistan. Circular plot area-constrained searches (45 plots in each habitat, each plot with an area of 25 m2) were used from March 2018 to July 2019. We recorded seven amphibian species, nine lizard species and six snake species. The species richness of amphibians and lizards was the same in the studied strata, while the detection and encounter rate of snakes was lower in the undisturbed forest and urban areas. The encounter rate of amphibians differed significantly between urban areas and hiking trails/undisturbed forest. The encounter rate and population density of lizards differed significantly between undisturbed forest and urban areas. The most frequently encountered amphibian species along the hiking trail and urban areas was Duttaphrynus stomaticus, with Hoplobatrachus tigerinus in undisturbed forest. The most common and frequently encountered lizard species along the hiking trail and urban areas was Hemidactylus brookii, while the Ophisops jerdonii was the most frequently seen in undisturbed forest. The most common and frequently encountered snake species along the hiking trail and undisturbed forest was the Indotyphlops braminus, while Ptyas mucosa was the most common in urban areas. The subsequent bio-assessment, based on herpetofauna, of the Park revealed good to excellent biotic integrity The Park faces threats including livestock grazing, alien invasive vegetation and human disturbance due to settlements, restaurants and tourism-related activities. While several of these threats have been mitigated since the establishment of the Islamabad Wildlife Management Board, the Park still requires improved management, especially regarding regulating tourism.
When xylarium and herbarium meet: linking Tervuren xylarium wood samples with their herbarium specimens at Meise Botanic Garden
Authors: Vanden Abeele Samuel , Beeckman Hans , De Mil Tom , De Troyer Cecile , Deklerck Victor , Engledow Henry , Hubau Wannes , Stoffelen Piet , Janssens Steven
Published: March 2021

The current data paper aims to interlink the African plant collections of the Meise Botanic Garden Herbarium (BR) and the Royal Museum for Central Africa Xylarium (Tw). Complementing both collections strengthens the reference value of each institutional collection, as more complete metadata are made available and it enables increased quality control for the identification of wood specimens. Furthermore, the renewed connection enables the linking of available wood trait data with data on phenology, leaf morphology or even molecular information for many tree species, allowing assessments of performance of individual trees. In addition to studies at the interspecific level, comparisons at the intraspecific level become possible, which could lead to important new insights into resilience to and impact of global change, as well as biodiversity conservation or forest management of Central African forest ecosystems.

By interlinking the Tervuren Xylarium Wood database with the recently digitised herbarium of Meise Botanic Garden, we were able to establish a link between 6,621 xylarium and 9,641 herbarium records for 6,953 plant specimens. Both institutional databases were complemented with reliable specimen metadata. The Tervuren xylarium now profits from taxonomic revisions made by botanists at Meise Botanic Garden and a list of phenotypical features for woody African species can be extended with wood anatomical descriptors. New metadata from the Tw xylarium records were used to add the country of collection to 50 linked BR herbarium specimens for which this information was missing. Furthermore, metadata available from the labels on digitised BR herbarium specimens was used to update Tw xylarium records with the date of collection (817 records), collection locality (698 records), coordinates (482 records) and altitude (817 records). In conclusion, we created a reference database with reliable botanic identities which can be used in a range of studies, such as modelling analyses, community assessments or trait analyses, all framed in a spatiotemporal context. Furthermore, the linked collections hold historical reference data and specimens that can be studied in the context of global changes.
Development of a risk-oriented algorithm for the combined use of hemostatics and anticoagulants to prevent thrombosis and bleeding cases after total arthroplasty of knee or hip joints
Authors: Golovko Lilia S. , Safronenko Andrey V. , Gantsgorn Elena V. , Sukhorukova Nataliya V. , Kapliev Andrey V.
Published: March 2021

Introduction: The goal of our study was to develop a risk-oriented algorithm for the combined use of hemostatics and anticoagulants in patients after total arthroplasty of the knee or hip joints to reduce the risk of thrombohemorrhagic complications.

Materials and methods: We performed a retrospective study (n=253). In group (Gr.) 1, the time interval (TI) between the administration of hemostatic and anticoagulant prophylaxis was ≤17 hours (n=145; 57.31%), and in Gr. 2 – 18-24 hours (n=108; 42.68%). We analyzed the influence of different factors on the development of thrombosis and bleeding cases after the operation.

Results and discussion: Thrombohemorrhagic complications were observed in 27 (10.67%) patients. Thrombosis in Gr. 1 was associated with the use of tranexamic acid, and were recorded 2.2 times more often than in Gr. 2 (p<0.05). The development of thrombosis in Gr. 1 was influenced by: class II obesity, type 2 diabetes mellitus, myocardial infarction, venous pathology, age of patients >75 years, for women – an initially low level of international normalized ratio, and activated partial thromboplastin time (APTT) (p<0.05). The development of bleeding in Gr. 1 was influenced by: age >75 years, among men and women – an increased preoperative level of APTT, for women – a decreased level of fibrinogen and platelets (p<0.05).

Conclusion: To prevent thrombosis and bleeding after arthroplasty of large joints, the TI between the use of hemostatics and anticoagulants should be at least 18 hours, especially in patients with the above risk factors, in particular, when using tranexamic acid and low molecular weight heparins.