bluuebunny/crossref_metadata_2025 huggingface dataset:
Ephemeral Keys Authenticated with Merkle Trees and Their Use in IoT Applications
Authors: Zajac Pavol
Published: March 2021

Public key algorithms based on quasi-cyclic binary moderate-density parity-check codes (QC-MDPCs) and QC low-density parity-check codes (QC-LDPCs) codes for key encapsulation and encryption submitted to the NIST post-quantum competition (Bit Flipping Key Encapsulation (BIKE), QC-MDPC KEM, LEDA) are vulnerable against reaction attacks based on decoding failures. To protect algorithms, authors propose to limit the key usage, in the extreme (BIKE) to only use ephemeral public keys. In some authenticated protocols, we need to combine each key with a signature, which can lead to increased traffic overhead, especially given the large signature sizes of some of the proposed post-quantum signature schemes. We propose to combine ephemeral public keys with a simple Merkle tree to obtain a server authenticated key encapsulation/transport suitable for TLS-like handshake protocols. This allows a very simple public key verification on the client, leading to efficient protocols suitable for Internet of Things applications.
Experimental Verification of the Concept of Using LOFAR Radio-Telescopes as Receivers in Passive Radiolocation Systems
Authors: Kłos Julia , Jędrzejewski Konrad , Droszcz Aleksander , Kulpa Krzysztof , Pożoga Mariusz , Misiurewicz Jacek
Published: March 2021

The paper presents a new idea of using a low-frequency radio-telescope belonging to the LOFAR network as a receiver in a passive radar system. The structure of a LOFAR radio-telescope station is described in the context of applying this radio-telescope for detection of aerial (airplanes) and space (satellite) targets. The theoretical considerations and description of the proposed signal processing schema for the passive radar based on a LOFAR radio-telescope are outlined in the paper. The results of initial experiments verifying the concept of a LOFAR station use as a receiver and a commercial digital radio broadcasting (DAB) transmitters as illuminators of opportunity for aerial object detection are presented.
Crack Detection and Localisation in Steel-Fibre-Reinforced Self-Compacting Concrete Using Triaxial Accelerometers
Authors: Ramli Jeffri , Coulson James , Martin James , Nagaratnam Brabha , Poologanathan Keerthan , Cheung Wai Ming
Published: March 2021

Cracking in concrete structures can significantly affect their structural integrity and eventually lead to catastrophic failure if undetected. Recent advances in sensor technology for structural health monitoring techniques have led to the development of new and improved sensors for real-time detection and monitoring of cracks in various applications, from laboratory tests to large structures. In this study, triaxial accelerometers have been employed to detect and locate micro- and macrocrack formation in plain self-compacting concrete (SCC) and steel-fibre-reinforced SCC (SFRSCC) beams under three-point bending. Experiments were carried out with triaxial accelerometers mounted on the surface of the beams. The experimental results revealed that triaxial accelerometers could be used to identify the locations of cracks and provide a greater quantity of useful data for more accurate measurement and interpretation. The study sheds light on the structural monitoring capability of triaxial acceleration measurements for SFRSCC structural elements that can act as an early warning system for structural failure.
Exploring Signals on L5/E5a/B2a for Dual-Frequency GNSS Precise Point Positioning
Authors: Naciri Nacer , Hauschild André , Bisnath Sunil
Published: March 2021

Due to its nature, Precise Point Positioning (PPP) depends on the GNSS measurements and quality of satellite correction products used to relatively quickly provide precise and accurate positions. With the rapid evolution of Global Navigation Satellite Systems (GNSSs), new frequencies and signals are being broadcast, which have a positive impact on PPP performance. This paper presents, for the first time, a comprehensive analysis of PPP performance from these new GPS, Galileo and BeiDou-2/3 signals, which are not yet commonly used for PPP, with correct mitigation of errors such as the estimation of GPS Block-IIF L5 variations. Satellite orbits and clocks, as well as GPS Block-IIF L5 corrections, are estimated in real-time using DLR’s RETICLE engine, while the user processing is performed with York University’s PPP engine. First, as a reference, PPP performance is assessed on widely used signals: GPS L1/L2, Galileo E1/E5a, and BeiDou-2/3 B1-2/B3. Horizontal and vertical rms of 2.3 and 2.6 cm, respectively, are achieved in static processing and 5.4 and 7.5 cm in kinematic processing after 1 h of processing using real-time satellite correction products. The compatibility of BeiDou-2 and BeiDou-3 on the shared B1-2/B3 frequencies is analyzed and discrepancies in the receiver clock are found. Next, since all three constellations share two common frequencies, the paper focuses on analyzing PPP performance of GPS, Galileo and BeiDou-3 on [L1, E1, B1] at 1575.42 MHz and [L5, E5a, B2a] at 1176.45 MHz. Horizontal and vertical rms of 6.9 and 7.1 cm are achieved in kinematic processing. The effect of the known GPS Block-IIF L5 biases is studied as well, as it is shown to affect the receiver position and clock, as well as the ionospheric estimates and ambiguities. Average improvements of 15% and 20% in the horizontal and vertical rms, respectively, are observed when these biases are mitigated.
Robust Inter-Vehicle Distance Measurement Using Cooperative Vehicle Localization
Authors: Wang Faan , Zhuang Weichao , Yin Guodong , Liu Shuaipeng , Liu Ying , Dong Haoxuan
Published: March 2021

Precise localization is critical to safety for connected and automated vehicles (CAV). The global navigation satellite system is the most common vehicle positioning method and has been widely studied to improve localization accuracy. In addition to single-vehicle localization, some recently developed CAV applications require accurate measurement of the inter-vehicle distance (IVD). Thus, this paper proposes a cooperative localization framework that shares the absolute position or pseudorange by using V2X communication devices to estimate the IVD. Four IVD estimation methods are presented: Absolute Position Differencing (APD), Pseudorange Differencing (PD), Single Differencing (SD) and Double Differencing (DD). Several static and dynamic experiments are conducted to evaluate and compare their measurement accuracy. The results show that the proposed methods may have different performances under different conditions. The DD shows the superior performance among the four methods if the uncorrelated errors are small or negligible (static experiment or dynamic experiment with open-sky conditions). When multi-path errors emerge due to the blocked GPS signal, the PD method using the original pseudorange is more effective because the uncorrelated errors cannot be eliminated by the differential technique.
Single-Run Separation and Quantification of 14 Cannabinoids Using Capillary Electrophoresis
Authors: Zaripov Emil A. , Lee Tiah , Dou Yuchu , Harris Cory S. , Egorov Artem , Berezovski Maxim V.
Published: March 2021

Quantification of major cannabinoids in cannabis products is normally performed using high-pressure liquid chromatography (HPLC)-based methods. We propose a cost-effective alternative method that successfully separates and quantifies 14 cannabinoids in a single run using capillary electrophoresis (CE) coupled with a UV detector in 18 min. The separation is carried out in 60% acetonitrile in the presence of 6.5 mM sodium hydroxide and 25 µM β-cyclodextrin, resulting in good separation of cannabinoids. Our CE method demonstrated the limit of detection between 1.2–1.8 µg/mL, with the linear range reaching up to 50 µg/mL. We validated the method performance by testing a plant extract and quantifying cannabinoid content. This method is the first to separate 14 cannabinoids in one run using a CE system with UV detection.
The Relation between Fisheries–Science Partnerships and Co-Management: A Case Study of EU Discards Survival Work
Authors: Gray Tim S. , Catchpole Thomas L.
Published: March 2021

This paper is an analysis of the relationship between the concepts of fisheries–science partnership (FSP) and fisheries co-management (FCM), using a case study of recent EU work on discard survival. Are FSP and FCM entirely different forms of joint activity, or is FSP a form of FCM or a means of preparing the ground for FCM? And is the recent EU work on discard survival a form of FSP, or of FCM, or both? A questionnaire was sent out by email in 2015 to 13 people who were involved in the discard survival work, and eight responses were received that covered eight projects in seven countries (Belgium, England, Denmark, France, Norway, Sweden, and the Netherlands). Our main findings are fourfold. First, while FSP and FCM are different forms of joint activity, they are both partnerships. Second, FSP may serve as a precursor or preparation for FCM. Third, the EU discard survival assessment work contains elements of both FSP and FCM, but is mainly a FSP exercise and falls far short of FCM. Nevertheless, fourth, this joint work alongside many other FSP initiatives undertaken under the auspices of the Common Fisheries Policy (CFP) (e.g., the GAP projects) has improved relations between fishers, scientists, and managers, and this may contribute to a modification of the CFP’s largely top-down decision-making system.
Sustainable Public Safety and the Case of Two Epidemics: COVID-19 and Traffic Crashes. Can We Extrapolate from One to the Other?
Authors: Lotan Tsippy , Shinar David
Published: March 2021

COVID-19 and motor vehicle crashes (MVC) are both considered epidemics by the U.S. Centers for Disease Control (CDC) and the World Health Organization (WHO), yet their progression, treatment and success in treatment have been very different. In this paper, we propose that the well-established sustainable safety approach to road safety can be applied to the management of COVID-19. We compare COVID-19 and MVC in terms of several defining characteristics, including evolvement and history, definitions and measures of evaluation, main attributes and characteristics, countermeasures, management and coping strategies, and key success factors. Despite stark differences, there are also some similarities between the two epidemics, and these enable insights into how the principles of sustainable road safety can be utilized to cope with and guide the treatment of COVID-19. Major guidelines that can be adopted include an aggressive policy set at the highest national level. The policy should be data- and science-based and would be most effective when relying on a systems approach (such as Sweden’s Vision Zero, the Netherlands’ Sustainable Safety, and the recommended EU Safe System). The policy should be enforceable and supplemented with positive public information and education campaigns (rather than scare tactics). Progression of mortality and morbidity should be tracked continuously to enable adjustments. Ethical issues (such as invasion of privacy) should be addressed to maximize public acceptance. Interestingly, the well-established domain of MVC can also benefit from the knowledge, experience, and strategies used in addressing COVID-19 by raising the urgency of detection and recognition of new risk factors (e.g., cell phone distractions), developing and implementing appropriate policy and countermeasures, and emphasizing the saliency of the impact of MVC on our daily lives.
Role of Electronic Relaxation Rates in the Casimir Force between High-Tc Superconductors
Authors: Castillo-López Shunashi G. , Villarreal Carlos , Pirruccio Giuseppe , Esquivel-Sirvent Raúl
Published: March 2021

We revisit the problem of the Casimir force between high-Tc superconductors below and above the critical temperature for the superconducting transition. Ceramic superconductors exhibit a different temperature dependence of the reflectivity when switching from the normal to the superconducting state. We leverage this unique characteristic with respect to ordinary metals to claim that these kind of materials can prove useful as an alternative system where the long-standing discussion on the role of electronic relaxation can be addressed. Furthermore, we show that the two main damping mechanisms associated with free and mid-infrared electrons dominate at very distinct scales, meaning that they can be considered separately when the Casimir force is measured as a function of slab distance. This facilitates the experimental identification of the role of the two electronic relaxation contributions to the force.
To a сomparative characteristics of national models of higher education organization
Authors: Molokova E.L. , Ustyuzhanin V.L.
Published: March 2021

The article examines national models of higher education organization. The analysis is based on the higher education systems of the USA, Germany, the Netherlands, China and Russia. The authors proposed a number of criteria for differentiating the principles of organizing the higher education system in different countries: classifying higher education as private (satisfied on the basis of private effective consumer demand) or collective (patronized) benefits, organizing financing of the higher education system, barriers (filters) for students «at the entrance» and «at the exit», the degree of commercialization of the activities of universities, the role of the academic community.
On the basis of the conducted research, ideal-typical models of the organization of higher education that exist in developed and rapidly developing countries are distinguished: the market for private services, state paternalism, the market for merit goods, the quasi-market and the hybrid model.
It is concluded that the low level of funding and the total commercialization of the activities of state universities give rise to many problems of Russian higher education, first of all, such as the decline in the quality of educational services and the prestige of this education itself.
Economy-2021: persistence of fundamental problems, imperative and directions of transformation of macro-level management models
Authors: Vinslav Yu.B.
Published: March 2021

The article considers the economic results of 2020. The key events of the country’s economic life related to the global coronavirus pandemic are described. The difficulties of the Russian economic situation in 2020–2021 are caused not only by the pandemic, but also by the persistence of problems of the raw material economy, as well as shortcomings of state and corporate governance. The tasks and directions of the national plan for economic recovery in 2021 are described. It emphasizes the importance of addressing not only the current problems of life support, but also focusing on strategic national goals to ensure economic sustainability. In this regard, the main principles of improving the quality of public administration are considered. A model for improving strategic planning at the macro level with active involvement of leading enterprises in the process is proposed. The article describes the main directions of diversification of the domestic economy, as well as the practice of implementing relevant industry strategies. The problem of formation of the national innovation system as a factor of ensuring the national security of the country remains relevant.
Bioprinted Vascularized Mature Adipose Tissue with Collagen Microfibers for Soft Tissue Regeneration
Authors: Louis Fiona , Piantino Marie , Liu Hao , Kang Dong-Hee , Sowa Yoshihiro , Kitano Shiro , Matsusaki Michiya
Published: March 2021

The development of soft tissue regeneration has recently gained importance due to safety concerns about artificial breast implants. Current autologous fat graft implantations can result in up to 90% of volume loss in long-term outcomes due to their limited revascularization. Adipose tissue has a highly vascularized structure which enables its proper homeostasis as well as its endocrine function. Mature adipocytes surrounded by a dense vascular network are the specific features required for efficient regeneration of the adipose tissue to perform host anastomosis after its implantation. Recently, bioprinting has been introduced as a promising solution to recreate
in vitro
this architecture in large-scale tissues. However, the
in vitro
induction of both the angiogenesis and adipogenesis differentiations from stem cells yields limited maturation states for these two pathways. To overcome these issues, we report a novel method for obtaining a fully vascularized adipose tissue reconstruction using supporting bath bioprinting. For the first time, directly isolated mature adipocytes encapsulated in a bioink containing physiological collagen microfibers (CMF) were bioprinted in a gellan gum supporting bath. These multilayered bioprinted tissues retained high viability even after 7 days of culture. Moreover, the functionality was also confirmed by the maintenance of fatty acid uptake from mature adipocytes. Therefore, this method of constructing fully functional adipose tissue regeneration holds promise for future clinical applications.
Advanced Thermally Drawn Multimaterial Fibers: Structure-Enabled Functionalities
Authors: Wang Zhe , Chen Mengxiao , Zheng Yu , Zhang Jing , Wang Zhixun , Yang Jiao , Zhang Qichong , He Bing , Qi Miao , Zhang Haozhe , Li Kaiwei , Wei Lei
Published: March 2021

Thermally drawn multimaterial fibers have experienced rapid development in the past two decades owing to the high scalability, uniformity, and material and structure compatibility of the thermal drawing technique. This article reviews various multimaterial fibers based on different functional structures and their applications in disparate fields. We start from the functional structures achieved in optical fibers developed in the early stage of thermally drawn fibers. Subsequently, we introduce both typical functional structures and unique structures created in multimaterial fibers for varying applications. Next, we present the early attempts in breaking the axial symmetric structures of thermally drawn fibers for extended functionalities. Additionally, we summarize the current progress on creating surface structures on thermally drawn fibers. Finally, we provide an outlook for this trending topic towards wearable devices and smart textiles.
Sand and social distancing: A UAS study of Galveston, TX, beach attendance during COVID-19
Authors: Ritt Benjamin , Jones Glenn , Retchless David
Published: March 2021

As the COVID-19 pandemic spread in early 2020, Galveston, Texas, suspended beach access from 29 March 2020 through 1 May 2020. This action was designed to reduce the number of visitors to the island and to reduce nonsocially distanced interactions. After the 1 May 2020 reopening mandated by the Texas governor, numerous individuals, largely from the Houston area, drove to Galveston to use the beaches. At that time, TV coverage of the large crowds left the impression that there was little to no adherence to the reopening guidelines put forward by the state and city. In order to gauge the effectiveness/observance of the reopening guidelines by Galveston’s beachgoers, a headcount and analysis of the measured distance between individual beachgoers was completed on 23 May 2020 using Unmanned Aircraft Systems (UAS) photography and Geographic Information System (GIS) measurement techniques. By June, the number of positive COVID-19 cases was rapidly increasing in the Houston area. Despite minimal use of masks and little adherence to social distancing, there was sufficient space on the beach to handle the crowds provided beachgoers had adhered to social distancing guidelines. Two issues were identified: limited access points creating chokepoints when moving from the Seawall to the beach, and the pervasive use of shade devices (i.e. umbrellas, pop-up tents and canopies) that act as congregation spots.
História, Memória e Historiografia
Authors: Lopes Ramos Francisco Régis
Published: March 2021

Livro com artigos apresentados no VI Seminário Internacional História e Historiografia. Os trabalhos aqui reunidos fizeram parte dos Simpósios Temáticos “Narrativa, memória e cultura histórica”, “Teoria da História e História da Historiografia” e “Memória/História: novas perspectivas”. Os diversos usos da história, corpo, memória, historiografia, monumentalização são alguns dos aspectos tratados nos textos aqui reunidos, que têm em comum a diversidade e qualidade.
Ciudad de Corrientes: testimonios no condenatorios hacia la ultima dictadura militar
Authors:   , Gandolfo Vanessa
Published: March 2021

La presente tesis realiza una descripción de los testimonios no condenatorios hacia la ultima dictadura militar argentina (1976-1983), los cuales son sostenidos por correntinos y correntinas que vivieron el período en la Ciudad de Corrientes, capital provincial. Para este objetivo se realizaron entrevistas abiertas de las cuales se tomaron los imaginarios sociales recurrentes con respecto a ideales de gobierno, de ciudadano/a, experiencias personales y conocimientos referidos al gobierno dictatorial.
PERFIL EPIDEMIOLÓGICO DOS CASOS DE INTOXICAÇÃO DOMISSANITÁRIA NO PÚBLICO INFANTOJUVENIL
Authors: Karoline Santos Lima Maria , Cecília Ventura Barbosa Hevillyn , Soares Alves Junior Josivan
Published: March 2021

As intoxicações sejam elas ocupacionais, acidentais ou autoextermínio, constitui atualmente uma problemática a ser evidenciada pela saúde pública devido sua importância epidemiológica e social em decorrência dos crescentes números de notificação, sobretudo no público pediátrico. Objetivo: Posto isto, os objetivos do presente estudo é de revelar a partir do Sistema de Informações e agravos - SINAN os casos de intoxicações domissanitária em pacientes pediátricos, revelar o perfil sociodemográfico e epidemiológico do paciente acometido por intoxicação domissanitária, identificar as principais causas e circunstâncias de intoxicação por saneantes, bem como apresentar as principais condutas realizadas no atendimento a pacientes pediátricos vítimas destas substâncias com base na literatura. Método: Trata-se de um estudo transversal, retrospectivo e descritivo com abordagem quantitativa pautado em uma análise do Sistema de Informações e Agravos - SINAN e com base em manuscritos de bases de dados Scielo, Pubmed e Google acadêmico. Resultados: Portanto, que as intoxicações em público infantojuvenil reduz de acordo com o desenvolvimento dos indivíduos e que a faixa etária entre 1 a 4 anos são mais vulneráveis devido as peculiaridades própria da idade, além do gênero mais atingido ser o masculino e de característica acidental. Conclusão: Nisso, pode-se dizer que os óbitos devido às intoxicações por saneantes dependem da quantidade ingerida, bem como conduta realizada para reversão do caso e que apesar dos índices baixos de letalidade por uso indevido de domissanitário, não se isenta os malefícios causados pela exposição ao saneante que pode ofertar, em longo prazo, problemas respiratórios o ressaltando ainda mais a necessidade de implantação de medidas preventivas.

Palavras chave: Enfermagem. Saúde Integral. Toxicologia.
Numerical Solution Of Partial Integro-Differential Equation Using Legendre Multi Wavelets
Authors: Hussain Amina Kassim
Published: March 2021

It is very important to state the initial assumptions for the description of physical phenomenon in the case of partial integro-differential equation. The parabolic equations and boundary conditions can be used to define the time-dependent diffusion process. The integro-differential equation is the combination of integration and derivatives. It is part of the technology, which includes science and engineering. Various models that cover the area of science and engineering are available. Moreover, variable techniques are accessible to solve the integro-differential equations. Numerical method is an important way to solve the challenges in the field of science and industry. To improve efficiency, the companies were working on computer simulation. For reliability, flexibility, and inexpensiveness, the numerical methods are preferred. Linear Legendre multi wavelets form a collocated method based on the numerical solution of one-dimensional parabolic partial integro-differential equation of diffusion type. In this study, we aim to study the diffusion method of numerical solution for the integro-partial differential equation. The diffusion method, its basic concept, and other methods used to solve integro-partial differential equations are also studied in detail. The proposed numerical method is useful to different benchmark problems and provides efficient, accurate, and robust results.
Discrete Hermite Wavelet Filters with Prove Mathematical Aspects
Authors: Abdulrahman Asma Abdulelah , Rasheed Mohammed , Shihab Suha
Published: March 2021

This article describes a new image processing method in order to enhance the images under testing based on discrete Hermite wavelet filter. Discrete Hermite Wavelet Transform, which was used in image processing, including compression and noise removal was used after a number of theories proved to be mathematically ready for use in image processing. Through Discrete Hermite Wavelet Transform at different levels by finding a new filter and using it to find peak-to-noise ratio values (PSNR), compression ratio, mean square error (MSE) and bits per pixel found. Achieving a high compression ratio is acquired by using a new image decomposition algorithm. Bit reduction per pixel is obtained at the second level when increasing the level of decomposition to obtain compression ratio while PSNR is decreased with the basic wavelets, due to the features that characterize Discrete Hermite Wavelet Transform. A new filter was discovered more efficient and effective in reducing the error significantly in rebuilding, MSE and bits per pixel, the samples image is used show efficient intermittent wavelets that were built in this work. This method enabling to extract the integration matrices using Hermite wavelet operation matrix of integration that leads to improve the quality of images under testing. The obtained results for decreasing of and increasing of confirm the accuracy and effectiveness of the proposed method. These results can be used in many fields such as medicine, science treatment, compression, and noise removal images.
Inhibition and Adsorption Using Thiazole-2-Carboxylic Acid as an Anti-Corrosive for Copper in HCl Media
Authors: Al-Uqaily Raheem A.H. , Al-Bayaty Subhi A. , Sager Athra G.
Published: March 2021

This research studied inhibition and adsorption using thiosol-2-carboxylic acid as an anti-corrosive for copper in an acidic environment. The aim of the study was to evaluate the inhibition efficiency of chemical inhibitors through two methods of weight loss, anode and cathode polarization, when concentrations of the inhibitor ranged from 100 to 250 ppm and at temperatures ranging from 40–60°C. The results showed that greater concentration of the inhibitor resulted in less corrosion and increased inhibition efficiency. This indicates the effectiveness of the inhibitor. By forming a layer on the copper surface and through the occurrence of adsorption due to the presence of nitrogen, sulfur and hydroxyl groups, the inhibitor transfers electrons from these groups to the surface of the metal, thus creating a protective layer that protects it from external influences.
Solid State Reaction Synthesis and Characterization of Aluminum Doped Titanium Dioxide Nanomaterials
Authors: Abbas Muna Muzahim , Rasheed Mohammed
Published: March 2021

In this paper, aluminum doped titanium dioxide nanopowder with doping concentration of different weights were successfully prepared with a simple technique: the classic ceramic technique (or solid-state method). This technique permits the acquiring of powders as pellets with a small amount of the material. The best conditions for the prepared pellets are obtained. Titanium dioxide nanoparticles are mixed with different amounts of aluminum concentrations (0%, 3%, 5%, and 7%). The powders were then mixed and consolidated into pellets and sintered using a conventional furnace at 1100oC. The mechanical, thermal, structural, morphological (including roughness of the samples’ surfaces), and optical properties for those as-prepared samples are demonstrated by: Shore D hardness instrument, roughness test Instrument, Lee's Disc, X-ray diffraction, optical microscope, scanning electronic microscope, energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy, respectively. The effect of aluminum doped concentrations on the characteristics of titanium dioxide nanoparticles depending on the above instruments are studied. The X-ray diffraction patterns appear to the crystallinity of these materials with a grain size between 20 nm and 30 nm. A roughness measurement indicates that the value of titanium dioxide nanoparticles decreases with the addition of aluminum weights according to the results of the hardness of the samples. Moreover, the results showed that the thermal conductivity increased with the increasing weight fraction of aluminum material. The main goal of the present paper is to investigate the annealing temperature-dependent behavior of the broadening parameter and the characteristics of aluminum doped titanium dioxide nanoparticles.
Theoretical Basis of Creation of Multicomponent High-Strength Composites
Authors: Lesovik Valery Stanislavovich , Tolstoy Aleksandr Dmitrievich , Lesovik Ruslan Valeryevich , Volodchenko Aleksandr Anatolevich , Fisher Hans-Bertram
Published: March 2021

Nowadays, with the advancement of science and technology, a big step has been taken in strengthening and improving concrete structures. Structure reinforcement with composite materials is one of the methods that has been considered and used in civil industry in recent years. One of the application domains of composite materials is to improve and increase the load capacity. This paper investigates the composite structure performance under the dynamic loads. Findings showed that these structures are low risk in the high and dynamic loads, which improves the structure life time. Increased corrosion resistance of the structure is a significant improvement in these materials. The load-bearing capacity of composite surfaces is 7 times that of reinforced concrete surfaces, while their weight is very light.
An Assessment of Saving Behavior in the Religious Education Institution
Authors: Murdayanti Yunika , Ulupui Igka , Gurendrawati Etty , Purwohedi Unggul , Suherman
Published: March 2021

The speed of a country’s economic growth depends on its ability to save; a higher level of savings will encourage investment and stimulate economic growth. Millennials must understand the meaning of saving and have an ability to independently manage their money. This article is a preliminary study whose purpose is to determine the financial knowledge, self-control, and religious beliefs that influence saving behavior among students who are in Millennial-Vertical Generations. This article describes a new idea with respondents from Islamic Education Institutions. The research method used is explanatory and examines the relationship between the hypothesized variables. The population in this study is 2,509 students in the Darunnajah Islamic Boarding School in South Jakarta, while the sample used the Slovin formula of 345 respondents. Data collection used primary data through the distribution of questionnaires. The data analysis technique used is the path analysis method, which measures the direct and indirect effects between variables. The hypothesis testing is done by comparing t-statistics with t-table, which is equal to 2.594 for n=268, or comparing P values with a significance level (0.05).The results of this study show the positive influence financial knowledge has on saving behavior; however, self-control has a negative influence on saving behavior and a positive influence on religious beliefs against saving behavior. This study recommends increasing the number of variables that play an important role in student saving behavior and expands the number of research objects to be compared.
Application of K-Means Cluster and Principal Component Analysis to Determine the Level of Priority for Acute Respiratory Infection (ARI)
Authors: Attia Astri , Purimahua Sintha Lisa
Published: March 2021

This research is aimed to determine the priority levels of acute respiratory infection (ARI) vulnerability for subdistricts within Kupang district, East Nusa Tenggara Province, based on the main determining factor of ARI vulnerability. This research utilized the principal component analysis method and K-Means cluster analysis. The research enabled to determine five priority levels of ARI vulnerability and the identify districts referring to these priority levels and the main determinants of vulnerability to insecurity of acute respiratory infections (ARI) typical for each priority level.
Internal Instability as a Security Challenge For Vietnam
Authors: Tien Nguyen Hoang , Van Tien Nguyen , Jose Rewel Jimenez Santural , Duc Nguyen Minh , Ngoc Nguyen Minh
Published: March 2021

National security is one of the most critical elements for Vietnam society, economy and political system, their stability, sustainability and prosperity. It is unconditionally the top priority for Vietnamese government, State, Communist Party and military forces. The article proposes a new research approach treating security and military science as interdisciplinary, but two of the branches of social science. Using empirical analysis and case study as research methods, the article is focused on internal instability as challenging security issue that could pose a real threat and danger to the current socio-economic and political system. Based on the obtained research results we can draw some implications and propose some viable solutions for the Vietnamese authority to guard the safety and security of the people, society and also its political existence.
Tauke and Emotional Network Model in Oil Palm Marketing: Getting Fresh Fruit from Smallholders in Indonesia
Authors: Ismail Rizabuana , Haryono Slamet , Harahap Ira Maya Sofa , Manurung Ria
Published: March 2021

This article describes how fresh fruit bunches grown by oil palm smallholders are incorporated into oil palm marketing models in Indonesia. This emotional network marketing model is a supplementary model of marketing models in Malaysia which is called factory centered and middleman model. This research uses a descriptive qualitative method. The data was collected by conducted in-depth interviews with 28 informants coming from 4 (four) categories of oil palm smallholders: oil palm tauke (middleman) that included big tauke and small tauke, workers in the loading ramps, and workers in the oil palm factories who were involved in oil palm marketing channels. The result of the research showed that the oil palm marketing channel between smallholders and either small tauke and big tauke was based on an emotional network with a strong bond of friendship, brotherhood, dwelling location, cash payment, giving loan with reasonable requirements, and providing transportation for fresh fruit bunches. In contrast, oil palm marketing channel among smallholders, loading ramp buyers, and POF was based on regulations. This writing presented a different perspective of oil palm marketing channels in general by involving the emotional network of the existing actors for getting fresh fruit bunches and the advantages of oil palm marketing. In this marketing model, there is a longer marketing channel and actors with their varied roles.
Sorbent based on modified hydrolysis lignin for the purification of wastewater from oil refineries
Authors: Гималетдинов Р.Р. , Усманов М.Р. , Валеев С.Ф. , Бодров В.В. , Паскару К.Г. , Вежновец В.П.
Published: March 2021

Представлены результаты исследований применения сорбента «SynergySorb® ПС-1000» на основе модифицированного гидролизного лигнина для очистки сточных вод крупных нефтеперерабатывающих предприятий. За счет развитой системы микро- и мезопор сорбент эффективно поглощает легкие фракции углеводородов, снижая общее содержание нефтепродуктов в сточной воде и интенсивность запаха вблизи открытых очистных сооружений. Полная динамическая обменная емкость сорбента по нефтепродуктам составила 0,605 г/г при фильтрации сточных вод одного из крупных российских нефтеперерабатывающих заводов. Средняя эффективность очистки до проскока нефтепродуктов составила 94%, интенсивность запаха воды в результате испытаний снижена с 5 до 2 баллов. Отработанный сорбент «SynergySorb® ПС-1000» относится к 4 классу опасности (малоопасный) по показателям токсичности и экотоксичности

The results of studies of using SynergySorb® PS-1000 sorbent based on modified hydrolysis lignin for the purification of wastewater from large oil refineries are presented. Owing to the developed system of micro- and mesopores, the sorbent effectively absorbs light fractions of hydrocarbons, thus reducing the total content of oil products in wastewater and the intensity of odor near open treatment facilities. The total dynamic exchange capacity of the sorbent for oil products was 0.605 g/g while filtering wastewater from one of the largest Russian oil refineries. The average treatment efficiency before the breakthrough of oil products was 94%, the intensity of effluent odor as a result of tests was reduced from 5 to 2 points. Spent SynergySorb® PS-1000 sorbent belongs to the 4th hazard class (low hazard) in terms of toxicity and ecotoxicity.
Coronavirus SARS-CoV-2 in wastewater
Authors: Кофман В.Я.
Published: March 2021

Пандемия СOVID-19, объявленная ВОЗ чрезвычайной ситуацией в области здравоохранения, вызвана новым коронавирусом SARS-CoV-2. По сообщениям из Евросоюза, США и Австралии, потенциальная выживаемость коронавируса SARS-CoV-2 в фекалиях и сточных водах в течение достаточно длительного времени создает реальную возможность его поступления с канализационными стоками на очистные сооружения или непосредственно в поверхностные воды при сбросе неочищенных стоков. Это свидетельствует о существовании потенциальной возможности передачи SARS-CoV-2 через воду. В этой связи особую актуальность приобретает разработка эффективных способов удаления и инактивации вирусов на очистных сооружениях. Наличие коронавирусной инфекции в сточных водах может представлять серьезную опасность для здоровья контактирующих с ними людей. К ним относится персонал очистных сооружений, а также население в целом, которое может подвергаться непосредственному воздействию необработанных или недостаточно обработанных сточных вод через неисправные водопроводные или канализационные коммуникации. Во многих странах для получения своевременной достоверной информации о распространении коронавирусной инфекции используют методы эпидемиологии сточных вод. Возможность выявления РНК вируса в сточных водах даже при низкой распространенности СOVID-19 и корреляция между концентрацией РНК SARS-CoV-2 в сточных водах и официальной информацией указывают на то, что наблюдение за сточными водами может стать чувствительным инструментом мониторинга циркуляции вируса в популяции.

The COVID-19 pandemic, declared by WHO as a health emergency, is caused by a novel SARS-CoV-2 coronavirus. According to reports from the European Union, the United States and Australia, the potential survival of the SARS-CoV-2 coronavirus in feces and wastewater for a sufficiently long time creates a real threat of its entry with wastewater into treatment facilities or directly into surface water while raw wastewater is discharged. This indicates the potential for the transfer of SARS-CoV-2 by water. In this regard, the development of effective methods for the removal and inactivation of viruses at the treatment facilities is of special actuality. The presence of coronavirus infection in wastewater can pose a serious health hazard to people in contact with it. These include the personnel at the wastewater treatment facilities, as well as the general population, who may be directly exposed to raw or inadequately treated wastewater through defective water or sewer systems. In many countries wastewater epidemiology methods are used to obtain timely reliable information on the spread of coronavirus infection. Possible detection of RNA virus in wastewater even with a low prevalence rate of COVID-19 and the correlation between the concentration of SARS-CoV-2 RNA in wastewater and official information indicate that monitoring wastewater can become a sensitive tool for monitoring the circulation of the virus in the population.
SIKAP PETANI TERHADAP POLA DAN SIFAT KOMUNIKASI DALAM PENYULUHAN PERTANIAN DI KELURAHAN MUGIREJO KECAMATAN SUNGAI PINANG KOTA SAMARINDA (Farmer's Attitude towards the Patterns and Forms Communications in Agricultural Extension in Mugirejo Urban Village, Sungai Pinang Subcity, Samarinda City)
Authors: MUFADHILAH RIZQY , MARIATI RITA , WIDURI NIKE
Published: March 2021

The purposes of this research were to determine the patterns and forms of communications and attitude of farmers in agricultural extension. This research was conducted from May to July 2019 in Mugirejo Urban Village, Sungai Pinang Subcity, Samarinda City. The number of respondents was 34 farmers. The data analysis method used is descriptive analysis. The results of research showed that the pattern of communication between agricultural extension worker and farmers in agricultural extension in Mugirejo is in the moderate category with a score of 37.96 in terms of four indicators, namely intrapersonal, interpersonal, group, and mass indicators. The form of communication is included in the good category in terms of four indicators, namely the communication forms of face-to-face, media, verbal and non-verbal. The attitude of farmers in agricultural extension to the patterns and forms of communication is categorized as sufficient in terms of three indicators, namely conative, cognitive, and affective.
IMPLEMENTASI BAURAN PEMASARAN TERHADAP MINAT PEMBELIAN RUMAH (STUDI KASUS PADA PT KALIMASADA DI BERAU)
Authors: Fajriani Fajriani , Remmang Hasanuddin , Chahyono Chahyono
Published: March 2021

Penelitian tersebut dianalisis dengan menggunakan analisis regresi linear berganda dengan menggunakan data primer yang diperoleh dari jawaban responden sebanyak 100 orang pembeli dan user perumahan kalimasada. Penelitian ini bertujuan untuk mengetahui implementasi bauran pemasaran secara simultan berpengaruh signifikan terhadap minat beli konsumen di perumahan kalimasada Berau. Berdasarkan hasil uji penelitian ini, bauran pemasaran dengan variabel orang, promosi dan tampilan fisik berpengaruh secara signifikan terhadap minat pembelian di perumahan kalimasada. Untuk variabel yang lain tidak berpengaruh signifikan terhadap minat beli konsumen pada perumahan Kalimasada.
This study was analyzed using multiple linear regression analysis, using primary data obtained from respondents' answers as many as 100 buyers and users of Kalimasada housing. This study aims to determine whether the implementation of the marketing mix simultaneously has a significant effect on consumers’ interest in buying a house in Kalimasada residence, Berau. Based on the testing results of this study, the marketing mix with the variables of people, promotion, and physical appearance has a significant effect on the interest in buying a house in Kalimasada residence. Meanwhile, other variables do not have a significant effect on consumer interest in buying a house in Kalimasada residence.
PENGARUH GAYA KEPEMIMPINAN, DISIPLIN KERJA DAN PELATIHAN TERHADAP KINERJA PEGAWAI DINAS KOMUNIKASI, INFORMATIKA DAN PERSANDIAN KABUPATEN DEIYAI
Authors: Edowai Robi , Remmang Hasanuddin , Said Miah
Published: March 2021

Masalah sumber daya manusia masih menjadi sorotan bagi organisasi untuk tetap dapat bertahan di era globalisasi. Sumber daya manusia mempunyai peran utama dalam setiap kegiatan organisasi. Walaupun didukung dengan sarana dan prasarana serta sumber dana yang berlebihan, tetapi tanpa dukungan sumber daya manusia yang andal, maka kegiatan organisasi tidak akan terselesaikan dengan baik. Tujuan penelitian ini adalah untuk menganalisis sejauh mana pengaruh gaya kepemimpinan, disiplin kerja dan pelatihan terhadap kinerja pegawai, serta untuk menganalisis sejauh mana pengaruh gaya kepemimpinan, disiplin kerja dan pelatihan secara simultan terhadap kinerja pegawai. Teknik pengumpulan data melalui observasi, kuesioner dan dokumentasi, dengan teknik analisis data menggunakan uji instrument penelitian, uji asumsi klasik, analisis regresi berganda serta pengujian hipotesis. Hasil penelitian menemukan bahwa gaya kepemimpinan, disiplin kerja dan pelatihan mempunyai pengaruh yang positif dan signifikan terhadap kinerja pegawai. Berdasarkan hasil analisis koefisien korelasi maka dapat disimpulkan bahwa gaya kepemimpinan, disiplin kerja dan pelatihan mempunyai pengaruh secara serempak atau bersama-sama terhadap kinerja pegawai pada Dinas Komunikasi, Informatika dan Persandian Kabupaten Deiyai.
The issue of human resources is still in the spotlight for organizations to remain viable in the era of globalization. Human resources play a major role in every organization's activities. Although supported by facilities and infrastructure as well as excessive sources of funds, without the support of reliable human resources, the activities of the organization will not be completed properly. The purpose of this study was to analyze the extent to which the influence of leadership style, work discipline and training on employee performance, as well as to analyze the extent to which the influence of leadership style, work discipline and training simultaneously on the performance of employees. Data collection techniques are through observation, questionnaires and documentation, with data analysis techniques using the research instrument test, classic assumption test, multiple regression analysis and hypothesis testing. The results found that leadership style, work discipline and training have a positive and significant effect on employee performance. Based on the results of the correlation coefficient analysis, it can be concluded that the leadership style, work discipline and training have an influence simultaneously or jointly on improving employee performance in the Department of Communication, Information and coding of Deiyai ??Regency.
A COMPARATIVE STUDY OF SURGICALLY INDUCED ASTIGMATISM IN
SUPERIOR AND TEMPORAL SCLERAL INCISION IN MANUAL SMALL INCISION
CATARACT SURGERY
Authors: Kumari Nitu , Preeti Kumari , Jha Alka , Jana Debarshi
Published: March 2021

Aim: To evaluate the amount and type of surgically induced astigmatism in superior and temporal scleral incision in Manual Small Incision
Cataract Surgery (MSICS).
Material and Methods: A prospective randomized comparative study was carried out in Upgraded Department of Ophthalmology, DMCH,
Laheriasarai, Bihar. Total 100 cases of senile or pre-senile cataract included in this study from July 2019 to December 2019. All the patients
underwent MSICS under peribulbar anaesthesia. The patients with very hard cataract were excluded so as to keep the incision size uniformity (6-
6.5mm). 50 cases received superior scleral incision and 50 cases received temporal scleral incision. Post operative astigmatism was studied in both
groups using Bausch & Lomb Keratometer on 1st day, 7th day, 6th week and 3rd month.
Results: After 3 months of surgery, out of 50 patients in superior scleral incision group 74% patients had ATR astigmatism and 16% patients had
WTR astigmatism whereas in temporal scleral incision group 56 % of the patients had WTR astigmatism and 36 % had ATR astigmatism. The
mean surgically induced astigmatism (SIA) in temporal incision group was signicantly less than the superior incision group after 3 months
postoperatively (t=2.33, p<0.05).
Conclusion: This study reveals that temporal approach MSICS produces less postoperative astigmatism and has manifold advantages over
superior incision MSICS with excellent visual outcome.