bluuebunny/crossref_metadata_2025 huggingface dataset:
Estimation of inertial sensors error impact on platformless inertial navigation system accuracy
Authors: Andreyev S. V. , Ilinykh V. V. , Ilinykh O. A. , Chertkov M. S. , Klyuchnikov A. V.
Published: April 2021

The study describes a mathematical error model of a platformless inertial navigation system and focuses on using Allan variance as a method for estimating such instrumental errors of sensors, such as zero signal bias instability, angle random walk and rate random walk. The paper shows the results of the work of the mathematical error model, the model being constructed using the estimated instrumental errors of a sample of sensor assembly which consists of three ring laser gyroscopes and a three-axis accelerometer unit.
FEM simulation of waveguide flange manufacture by closed bulk forming
Authors: Arkhipov A. A. , Lyubimskiy S. V.
Published: April 2021

The purpose of the study was to analyze the basic technological process of manufacturing waveguide flanges at PJSC “ALMAZ R&P Corp.” LEMZ Division. A method for optimizing the process has been proposed, and a theoretical study using the finite element method has been carried out. The stress-strain state of the forging of a complex shaped flange during its manufacture with closed bulk forming has been analyzed as well.
Anti-jamming antenna array model for satellite navigation equipment
Authors: Ryapolov A. V. , Fambulov N. V.
Published: April 2021

The paper introduces the brief results of modeling an antenna array designed to be used as part of anti-jamming satellite navigation equipment. The study describes the procedure for calculating the weight coefficients of the antenna array based on the orthogonalization of signal and jamming spaces. According to the weight coefficients found, the resultant antenna patterns are plotted. Findings of the research show the results of how the depth of sample accumulation influences the effectiveness of adaptation to the jamming environment
Personal development as an important component of work with personnel leaders of JSC “Almaz - Antey” Air and Space Defense Corporation
Authors: Bashkatova Y. A. , Korobeynikova E. V.
Published: April 2021

The paper reviews the results of studying the types of professional motivation and interpersonal relation styles among the winners of the leadership identification program 2017 of “Almaz - Antey” JSC Air and Space Defense Corporation. As a result, there were developed recommendations as to the organization of work aimed at the personal development of future managers
Small-size inertia sensor
Authors: Kitaev V. N. , Afanas’Ev R. L. , Petrov M. V. , Pol V. V.
Published: April 2021

The study introduces the design and principle of operation of the inertia sensor IV29 with a permanent magnet. According to the mathematical model developed, we consider the results of the sensor parameter estimation, and propose the options for a possible optimization of the magnetic system of the sensor for a better fine-tuning of its actuation data
Selection of composite material in thin-walled structures operating at elevated temperatures
Authors: Abdrakhmanov F. K. , Volosov D. R. , Karpuzikov S. A. , Koytov S. A. , Melnikov V. N. , Salimov V. E.
Published: April 2021

At present, of special interest are polymer composite materials reinforced with carbon fibers - carbon fiber-reinforced plastic, which have increased specific strength, rigidity, wear resistance, etc. The purpose of this research is to study the physical and mechanical properties of composite materials reinforced with carbon and aramid fibers. According to the obtained temperature dependences of σ and E, we have selected the optimal variant of the polymer composite material on the basis of a nano-modified epoxy binder reinforced with carbon fibers
Algorithmisation methods for scheduling in high-performance assembly manufacturing
Authors: Skornyakova E. A. , Vasyukov V. M. , Sulaberidze V. S.
Published: April 2021

The authors analysed the most popular production planning and scheduling software systems. Their main disadvantage is that they lack lean manufacturing tools. There exists a demand for client-oriented systems based on lean principles. The paper describes a unique algorithm for computing the optimum takt time, which forms the basis of the scheduling system developed by the authors. We present methods of algorithmising the scheduling process and results of generating schedules using several algorithms
Development of synthetic methodology of neuro-fuzzy controller adjusted by genetic algorithm
Authors: Pervushina N. A. , Donovskiy D. E. , Khakimova A. N.
Published: April 2021

The paper focuses on a synthetic methodology of a neuro-fuzzy controller adjusted by genetic algorithm for a dynamic control object. An algorithm for controller synthesis and a genetic algorithm for adjusting the controller's parameters have been developed. The methodology has been tested on the classical problem of stabilizing a vertical pendulum on a mobile trolley. The results obtained confirm the efficiency of the methodology and allow for the conclusion that the neuro-fuzzy controller when appropriately adjusted ensures high quality of the stabilization system, even if there are random disturbances on the dynamic object
Equivalence of some schemes for constructing adaptive spatial filtering in phased antenna arrays
Authors: Kiryakmasov A. K.
Published: April 2021

The study proves that with adaptive spatial filtering in the space of elements in the scheme with a dedicated main channel, the filtering results do not change depending on whether auxiliary elements are included in the main channel or not. It is also proved that in the ray space a homogeneous scheme and a scheme with a dedicated main channel are equivalent
Radar receiving of long pulse burst when detecting moving targets
Authors: Chepkasov A. V. , Sukhoplyuev A. V.
Published: April 2021

The paper introduces an algorithm for detecting a burst of radio pulses. The algorithm takes into account the phase advance due to the Doppler effect at a constant radial velocity of the target, as well as the degree of pulse coherence in the received burst. The algorithm proposed is highly competitive in terms of detection performance with the algorithms of coherent or incoherent integration
Operation of an inverting DC-DC converter with charge pumping and LDO in the LM 27762 microcircuit
Authors: Bityukov V. K. , Petrov V. A. , Sotnikova A. A.
Published: April 2021

The paper focuses on the study of operation of an inverting DC-DC converter with charge pumping and LDO, which are the part of the combined bipolar secondary power supply LM 27762. The measurements covered two modes amply included in the range of normalized parameters with input voltages equal to 3.5 and 5.5 V, and output voltages 1.8 and 4.9 V, respectively, as well as the mode with an input voltage of 5.0 V and an output voltage 4.7 V, with a difference in the input and output voltage not exceeding the normalized limit of the voltage drop across LDO . Pulsations of voltages were measured at various load currents from 15 to 250 mA at the positive and negative poles of the flying capacitor, at the output of the charge pumping system and, in the latter case, also at the output of the microcircuit. Based on the results obtained, it was shown for the first time how at low load currents up to about 100 mA the charge pumping system operates in the burst mode, and at higher currents, it operates in the charge pumping mode with a constant frequency
Study of vortex element method parameters and their effect on rigid rotation bodies aerodynamic computations
Authors: Kudrov M. A. , Shcheglov A. S. , Bugaev V. S.
Published: April 2021

The purpose of this study was to implement a software package that allows non-stationary aerodynamic computations of fixed rotation bodies using the vortex element method. In the course of the work, we developed an algorithm for rigid rotation bodies aerodynamic computations by means of this method. Furthermore, we studied the influence of calculation parameters on the results obtained.
Influence of structural graphite surface electrospark machining conditions on erosion resistance
Authors: Belozerov L. S. , Kazin A. A. , Kuptsov S. G.
Published: April 2021

The study deals with the erosion resistance of graphite samples with an electrospark coating surfaced in different conditions. The purpose of the study was to identify the coating of better quality. During the experiment, three metals were used as the anode: tungsten, titanium, and vanadium. For erosivity, plasmatron was used
Determination of kinetic parameters for pressed tetranitropentaerytrite according to results of ODTX experiments
Authors: Zuev Y. S. , Karmanov N. I.
Published: April 2021

The paper introduces a method for determining kinetic parameters for the pressed explosive tetranitropentaerytrite. This method includes analytical dependence for the period of induction, which is used to process the experimental data, and the ANSYS CFD finite element analysis software package. The found values of the kinetic parameters made it possible to obtain a satisfactory agreement between the calculated and experimental ignition distances for pressed tetranitropentaerytrite
Method for determining the spatial position of the center of gravity of machines
Authors: Blinov I. A.
Published: April 2021

Having analyzed traditional methods for determining the coordinates of the center of gravity of machines, we developed a three-coordinate method using the simplest and most affordable means of hanging products with a crane beam. The method differs from analogues in the minimum number of weighings when there are no force-measuring means as a component of the measuring circuit. We introduce a mathematical model, which is the core of the method, and a computer model which minimizes the complexity of mathematical processing of measurement results
Vector method in generating trajectory parameters in the air raid simulation task
Authors: Konovalchik A. P. , Konopelkin M. Y. , Kudrov M. A. , Grevtsov N. M. , Martynov I. A.
Published: April 2021

The paper focuses on the problems of mathematical model development that allow simulating the motion of airborne objects of aircraft, missile and helicopter types. The simulation results of various spatial maneuvers are given
Modeling a fractional order control system with a high-inertia control object using the example of an antenna rotator stabilization system
Authors: Baboshkin G. D. , Ushakov P. A.
Published: April 2021

The paper considers the problem of achieving high quality control of the system with an object having a high-inertia component. Modeling a stabilization system with a classical proportional-integral-differential controller (PID controller) showed that when using such a controller, it is not possible to achieve the desired control quality due to the long time needed to establish a transition process with the required overshoot. We suggested a hypothesis that using a fractional order PID controller (FPID controller) it is possible to solve this problem. We carried out mathematical modeling of the system with the FPID controller and revealed that the FPID controller can significantly reduce the time needed to establish the transition process of the system under consideration. The study describes elements with fractal impedance based on a resistive-capacitive medium, and gives a description of their model. The adequacy of the mathematical model is confirmed by means of the sheet-oriented model in the LTSpice program using the selected model. Conclusions are made about the feasibility and necessity of conducting research in the field of design and manufacture of a FPID controller and elements with fractal impedance
Small-class UCAV required release determination software for ground target destruction
Authors: Rybalko A. G. , Ananiev A. V. , Lazorak A. V. , Klevtsov R. P.
Published: April 2021

The study introduces special software which enables the increase in the efficiency of preparing source data and performing navigational calculations when planning the ground target impact effect of small-class unmanned air vehicles. We developed methods for measuring the coordinates of the impact points of the mock-up destruction means. As a result of integrating these methods, we managed to halve the time for determining the parameters of distribution of the overall mass mock-up destruction means of small class UCAV - free-falling uncontrolled containers, and also significantly increase the reliability of statistical data. The paper shows the unmanned combat air complex distribution patterns and accuracy characteristics obtained using the specified software during the factory tests which aimed at evaluating the accuracy of dumping the overall mass mock-up free-falling uncontrolled containers. The special software developed makes it possible to determine the required release of unmanned air vehicles and automate the preparation of reporting documentation
The effect of the underlying sea surface on the angular measurements of the radar homing head
Authors: Mizrokhi V. Ya.
Published: April 2021

For the first time, based on the results of anti-aircraft missile launches against anti-ship missiles flying low over the sea surface, an attempt was made to build a model of the effect of the underlying sea surface on the angular measurements of an active radar homing head. The factor determining this effect is revealed, and it is shown that this factor determines the accuracy of homing, i.e. it is the determining factor.
Printed dual-band end-feed dipole radiators
Authors: Alekseytsev S. A. , Bukhtiyarov D. A. , Gorbachev A. P. , Parshin Yu. N. , Tarasenko N. V.
Published: April 2021

The study describes a new dual-band dipole printed radiator, which is part of an integrated module that contains a strip-slotted balun, whose outputs are first connected to the remote ends of both halves of the dipole radiator. We examine the features of its structural implementation, layout and technological performance, and give optimized geometric parameters of the printing module. The experimental results verify the proposed approach and serve as evidence of the acceptability of the obtained operating characteristics of the radiators.
Forming an archive of electronic remedial maintenance files in the information system for service maintenance of military weaponry and special equipment
Authors: Kostrov B. V. , Sumenkov N. A. , Lukina N. V. , Fokina N. S.
Published: April 2021

TThe paper considers the process of archive formation for the case of documents stored as images in information support systems for service maintenance processes concerning military weaponry and special equipment. This operation makes it possible to eliminate data redundancy in documents depending on the purpose of the system on the whole and characteristic markers of the images restored.
An advanced new-look tactical air defense armament system
Authors: Druzin S. V. , Mayorov V. V. , Gorevich B. N.
Published: April 2021

The study looks back at the development of the tactical air defense armament system, and describes the main current trends and technologies for creating its elements. The principles of construction and the structure of the advanced tactical air defense armament system are substantiated. A procedure has been proposed for creating a new-look tactical air defense armament system.
Forecasting the state of agricultural enterprises based on the results of economic diagnostics
Authors: Bezpartochna Olesia
Published: April 2021

This article is devoted to the study of information support and methodological tools for economic diagnostics of agricultural enterprises, based on the results of which the cost of resource potential predicted. Determined the factors of influence of the internal and external environment on forecasting the cost resource potential of agricultural enterprises. The methodological toolkit for forecasting the cost resource potential of agricultural enterprises used, taking into account the extrapolation of indicators and the coefficient of change. Built the economic-mathematical models for forecasting the general potential of agricultural enterprises in Ukraine. Proposed the scheme of forecasting the state of agricultural enterprises and complex information support the stages of making managerial decisions by the management of agricultural enterprises. For agricultural enterprises of Ukraine, promising directions for the development of economic activities are proposed.
Social Entrepreneurship as an Instrument of Development of Small and Medium Entrepreneurship in Ukraine
Authors: Lysiuk Oleksandra , Britchenko Igor
Published: April 2021

The article describes the features of social entrepreneur development as a way of government regulation of labor market. Different ways of definition “social enterprise” are analyzed. During the research, the models of improvement and development about regulation of this activity in other countries were analyzed. Analyzing the modern models of social entrepreneurship in other countries demonstrates how it is popular and deals with the problems of unemployment and social safety. In the current situation in Ukraine this model of entrepreneurship is not so popular. For the changing situation we described and proposed the mechanism of development of social entrepreneurship. For the more active development of this entrepreneurship model we have proposed: to create, pass and apply the law about social entrepreneurship, which can measure the criteria for this type of activities and the law mechanism to support social entrepreneurship; to spread information about this type of activity through the informational channels; to develop and establish programs about professional education for people, who would like to work at the social entrepreneurship area. The characteristics of social entrepreneurship were compared, charitable organizations and traditional business. Features and criteria, which characterize the social entrepreneurship are described. Experience of developing social entrepreneurship in other countries and the benefits of involving labor force in Ukraine are compared. The methods used for research are comparing and analyzing. The main goal of social entrepreneurship is producing goods and services for solving social problems and searching the ways of improving the economic situation in Ukraine.
The ways of the value assessment the enterprises and the micro-enterprises
Authors: Borowska Maria
Published: April 2021

The paper concerns the assessment of the value of the enterprises, including the micro-enterprises. There are not so many publications regarding the micro-enterprises in comparison to the matters of the assessment of the big enterprises. Whereas, the importance of the microenterprises in the domestic, regional and global economy is crucial. In this paper, it is discussed the core of the assessment of the value of the enterprises and its aim and also the characteristics of the assessment of the market value of the micro-enterprises including its genesis. Furthermore, there are also alleged the functions of the assessment of the market value of the micro-enterprises, and also its methods applied in Germany and in the USA. The paper also presents the basic group of methods discussed in the Polish literature. It is presented the detailed review of the chosen ways of the assessment of the values of the enterprises and micro-enterprises including the demonstration of the particular quantitative tools (mathematical formula) used in the assessment practice. There are among others the balance transaction method, and also different methods: profitable, market, cost, property and mixed. In the final conclusion, there are included the motions concerning the assessment of the market value of the micro-enterprises due to the specific role of their functioning in the economy.
National Audit Authorities and their impact on the assurance level of the EU Cohesion Policy spending
Authors: Bode Marcel
Published: April 2021

The European Union’s Cohesion Policy plays a key role to reduce development disparities between regions in the EU in order to increase economic, social and territorial cohesion. Cohesion Policy in the EU is planned and implemented within a multilevel governance structure embracing a wide range of stakeholders. For the 2007-2013 programming period, a formal three-level control structure was introduced at national level for the first time, with the audit authority as the first “independent” audit layer. Preliminary studies indicate that the introduction of the AAs has been a milestone in making the management and control system of the EU’s budget implementation more robust, thus contributing to protect the EU budget from ineligible spending. This research paper analyses whether the work of the national audit authorities in the framework of the EU’s Cohesion Policy has an effect towards the assurance level of the EU spending in this area. The analysis links the development of the irregular spending with the development of the tasks entrusted to the audit authorities. The main objective of the article is to conclude on whether the evolution of the responsibilities of the audit authorities contributed towards a more robust management and control system for the delivery of Cohesion Policy.
SPATIAL ANALYSIS OF SUBWAY PASSENGER TRAFFIC IN SAINT PETERSBURG
Authors: Baltyzhakova Tatiana , Romanchikov Aleksei
Published: April 2021

The purpose of the paper is to create clear visualization of passenger traffic for Saint Petersburg subway system. This visualization can be used to better understand the passenger flow and to make more informed decisions in future planning. Research was based on officially published information about passenger traffic on subway station for years 2016 and 2018. Visualization was created with the variety of methods and software: Voronoi diagrams (QGIS software), social gravitation potential (R programming language), presentation of gravitation potential as a relief (Blender software), service zones of ground transport accessibility (2GIS, QGIS and Mapbox mapping platform). In this research, authors propose the use of intersection between the service zones and social gravitation potential isolines as an instrument for spatial analysis of traffic data. Analysis shown that current development of subway system does not correspond to passenger distribution. All stations were classified according to their accessibility and propositions about future directions of development were made.
Reassessment of Varronia bellonis - a threatened, endemic plant from Puerto Rico
Authors: Hamilton Martin , Maldonado-Castro Anthony , Sustache José , Monsegur-Rivera Omar
Published: April 2021

Varronia bellonis (Urb.) Britton is a lianescent or recumbent shrub that is endemic to Puerto Rico where it is restricted to specific geology types with a limited extent on the western half of the Island. The species occurs on serpentinite geology covered by serpentine-derived soils in the west-central mountains and on limestone geology in the the northern karst region. The species area of occupancy is estimated to range between 108 km2 and 268 km2 and its extent of occurrence to be between 644 km2 and 852 km2. The number of locations are estimated to be four. There are 418 known mature individuals in the wild (Hamilton 2020a). The species was previously assessed as Critically Endangered (Linsky and Sustache 2014), based on available information. However, an international team have been collaborating to conserve the species and, based on new information derived from this work, the species is reassessed as Endangered (EN), based on Criteria B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v), according to the IUCN Red List Categories and Criteria (version 3.1) and guidelines (IUCN Standards and Petitions Committee 2019).

Areas of suitable habitat across the native range of the threatened plant, V. bellonis, were surveyed by a team of experts between 2016 and 2019 to determine the species habitat preferences, identify threats to the species survival and provide an up-to-date meta-population status. The new information enabled members of the international team to reassess the species status and will enable sound and scientifically-based recovery actions to be recommended that can secure Varronia bellonis populations for the future. Parallel efforts are ongoing to explore the species population genetics and reproductive biology.
Figures de l’altérité dans le roman de Philip Roth The Human Stain
Authors: Trabelsi Mabrouk
Published: April 2021

L’objectif de cet article est de montrer à travers les différentes catégories de l’ Autre , présentes dans le roman de Philip Roth, The Human Stain (illustrant les problèmes d’identités dont souffrent Coleman Silk, le personnage central, Faunia Farley, Lester Farley et Delphine Roux) que le véritable enjeu du roman est celui de l’identité américaine. Tous ces personnages sont en quête d’une autre Amérique et d’une redéfinition de l’américanité. En fait, ces personnages reflètent une crise de l’identité américaine.
Induction et loi naturelle chez Mill
Authors: Brandelet Antoine
Published: April 2021

Le Système de Logique (1843) de John Stuart Mill est souvent considéré comme une œuvre défendant une épistémologie inductiviste. Dans cet article, je me propose de questionner ce statut en me penchant sur la définition de l’induction qui est proposée dans l’ouvrage. Je montre que l’inductivisme de Mill induit une méthodologie de la recherche scientifique dans laquelle les raisonnements déductifs sont aussi, sinon plus, importants que les méthodes inductives, de sorte que l’opposition entre induction et déduction se transforme en complémentarité. Je montre ensuite comment les concepts de loi naturelle et de causalité émergent de ces discussions et j’examine dans quelle mesure les méthodes proposées par Mill peuvent rendre compte des découvertes scientifiques ultérieures.
Ergonomie et Formation : Chassés-Croisés
Authors: Weill-Fassina Annie
Published: April 2021

Le but de cet article est de décrire sur la base de mon expérience personnelle comment et pourquoi des liens méthodologiques et théoriques ont pu se construire entre ergonomie cognitive et didactique pendant ces 40 dernières années. On insiste sur les impacts combinés des orientations institutionnelles et scientifiques. Cependant ces deux disciplines et leur relations sont à penser dans le cadre plus général de l’organisation du travail et de la formation professionnelle.
Professionnalisation et apprentissage à l’aide d’un simulateur dans un environnement dynamique lié au vivant : apprendre à mettre en place une culture de colza
Authors: Jaunereau André
Published: April 2021

Après avoir posé les éléments généraux théoriques de l’usage de la simulation dans la formation, nous avons voulu dans cet article discuter des résultats recueillis à partir de l’usage d’un simulateur de mise en culture de colza par un groupe d’étudiants en fin de formation BTS Technologies Végétales. Les résultats de cette enquête montrent une bonne maîtrise préalable de la part des étudiants des connaissances de nature épistémique relatives à la mise en culture du colza. Mais au-delà de ces acquis nécessaires à l’utilisation du simulateur il conviendra de prendre en compte dans l’activité d’apprentissage des jeunes des ensembles de caractéristiques liées aux orientations individuelles et sociales que peuvent privilégier chaque individu. C'est donc, à partir de connaissances techniques préalablement acquises, cet emboîtement de modèles d'organisation de l'activité, intégrés selon chaque sujet et orientés par un modèle social fort, qui va permettre aux acteurs de se construire leur professionnalité et de faire face ainsi aux multiples contingences et aléas de leurs situations de travail.
Circadian influence on post-exercise hypotension: a review
Authors: Bommasamudram T. , Gandhi P. , Iype R. Oommen , Raj B. , Chandrasekaran B.
Published: April 2021

Circadian rhythm (CR) can influence the physiological and psychological parameters in every individual. There is a sinusoidal response to blood pressure brought about by the CR. A drop in blood pressure response immediately after an exercise is termed as post-exercise hypotension (PEH). The objective of the present paper is to review the influence of CR on PEH. Comparing the types of exercises, aerobic training showed a higher magnitude of the drop in PEH than resistance training. However, the majority of the studies have not considered the CR influence on PEH. With the evidence available, we can conclude that morning exercise shows the higher magnitude of the drop in PEH and could be sustained for a longer duration.
Formes programmées de l’écriture vidéoludique
Authors: Sellier Hélène
Published: April 2021

Dans la lignée des platform studies et des recherches sur la narrativité du jeu vidéo, cet article s’intéresse à l’influence des logiciels d’écriture interactive sur la forme des récits produits. Je soutiens que ces programmes, créés au sein d’une culture médiatique qui s’appuie sur un système générique dynamique, influencent à leur tour la manière dont sont conçues les œuvres. À partir d’un processus de recherche-création et d’analyses d’œuvres publiées, Twine, Ren’Py et Quest sont étudiés en fonction de trois aspects narratifs : l’intermédialité intracompositionnelle, les modalités du récit (mode, voix, temps) et l’interactivité.
Le jeu vidéo au défi de l’œuvre d’art
Authors: Krajewski Pascal
Published: April 2021

L’article entend défendre la thèse que le jeu vidéo se constitue en art à partir du moment où il est fort de suffisamment d’œuvres couvrant des territoires décisifs pour son devenir artistique, à savoir des jeux parfaits, inédits, autoréflexifs, poétiques ou profonds. Car cette cartographie n’est pas sans rapper l’esthétique goodmanienne, qui offre cinq critères d’articité : densité syntaxique, densité sémantique, saturation relative, exemplification et référence multiple et complexe.Dès lors, s’il est bien convenable de parler du jeu vidéo comme d’un art, il devient concevable de chercher les qualités propres de l’œuvre d’art vidéoludique, ses spécificités, qu’elle ne partage avec celle d’aucun autre médium. Nous proposons d’en retenir deux : le défi et l’implication.
Exploring the Post-Doctoral Journey
Authors: Orr Lynne , Weekley Linda
Published: April 2021

The purpose of this chapter was to promote a supportive journey of the postdoc candidates to collaborate and discover a career position upon the completion of a doctoral degree. Examples of safe harbors for moving through the post-doctoral career experiences will also be provided. Specifically, this chapter will focus upon post-doctoral education program graduates, of which there are minimal research and programs available directly related to education doctoral graduates. There is a decline of PhD students entering the academic career. Additional career options beyond the academia will be discussed. Lastly, the postdoc career development plan will be recommended along with viable services for the postdoc who remains in academia.
What Makes SMEs Entrepreneurs in Central Java Adopt E-Commerce?
Authors: Tusyanah Tusyanah , Sakitri Wijang , Rahmawati Fentya Dyah , Dewi Lita Citra , Indira Fransisca Rahcmawati
Published: April 2021

The adoption of e-commerce by SMEs is inevitable given the changing disruptive era where marketplaces innovation opens opportunities for SMEs to become partners if they want to promote their products through marketplaces. This study uses an integrated framework of TAM, TPB, and TOE on food processing MSMEs in Semarang. There are 10 variables that affect the adoption of e-commerce; the largest to smallest influencing variables are competitive pressure, current situation, social influence, perceived trust, perceived ease for use, perceived usefulness, individual difference factors, trading partner readiness, perceived service quality, and consumer readiness. Competitive pressure is the variable with the biggest effect (26.1%) on the adoption of e-commerce. Furthermore, based on three major factors, technology, organization, and environment, the influencing factors are environment and organization; they give an effect of 56.2% on the adoption of e-commerce. Thus, the adoption of mobile-applications (GOJEK, Shopee, Grab, Tokopedia, Bukalapak) is needed to increase sales.
Impacts of Coronavirus (COVID-19) on Digital Marketplace in Brunei Darussalam
Authors: Abdullah Alif Azizi , Almunawar Mohammad Nabil , Anshari Muhammad
Published: April 2021

The main purpose of this research is to identify the impact of coronavirus (COVID-19) on the digital marketplace of Brunei. The realization of the potential of digital marketplace have enable it to develop and grow in application among start-ups and businesses in Brunei. COVID-19 has negatively impacted the micro, small, and medium enterprises of Brunei due to social distancing measures and crowd restrictions. Furthermore, the suspension of dine in services across the nation paved the way for food delivery service platforms to thrive during the pandemic. The platforms provide security, safety, and convenience to ensure reliability for consumers during the pandemic. Transitioning towards digital mediums was necessary to provide an intermediary for MSMEs and consumers to stay connected under difficult circumstances. A case study approach was used to get information from digital marketplaces that were thriving during the pandemic. The results indicate the impact towards digital marketplace during the pandemic are positive.
Approaches to Tackle Smart Cities Challenges in Brunei
Authors: Saifulbahri Nur Farhana Nabillah , Lim Syamimi Haji Mohd Ariff
Published: April 2021

There has been an increase in attention for the smart city concept in many developed and developing countries due to urban challenges. Hence, there is a need for a country to implement smart city concepts to improve overall aspects of cities and its citizens' quality of life. However, developing smart cities is enormously complex and could face numerous challenges. The purpose of this study is to observe the current smart cities development in Brunei, the challenges faced, as well as approaches to tackle them. Furthermore, to analyse the qualitative findings, this study has used thematic analysis. From the analysis, the challenges in the development of smart cities initiatives were categorized into four categories: governance, social, economic, and technology. Some of the challenges include lack of citizen's engagement and also awareness and knowledge of smart city concepts, etc. Appropriate approaches were also developed with reference to the literature, and the suggested approach from the findings includes imposing policies and improving education structure according to current needs.
What Are the Driving Factors of Purchase Intention of Mutual Funds Through Digital Wallet Platform in Indonesia?
Authors: Candra Sevenpri , Wirakusuma Kristoforus Hyronimus Andreaw
Published: April 2021

The stability of economic growth can't be separated from the role of domestic and foreign parties. Therefore, it requires participation from various parties to meet the sources of funding or investment financing in realizing equitable economic development. One source of funds that can boost development in Indonesia is through investment. Through technology, investment can be more easily to be offer to consumer and that kind of technology is digital wallet. This research was to analyze the drive factors of consumer purchase intention of mutual fund through digital wallet platform in Indonesia. Questionnaires and sampling with up to 406 respondents was analyzed by using multiple linear regression analysis. This study shows that perceived usefulness, perceived ease of use, consumer innovativeness, ethical awareness, performance expectancy, privacy concern are driving factors. Furthermore, there are several points that should be enhanced to make all of driving factors more impact to influence consumer purchase intention.
An Overview of Agriculture Development Programs for Poverty Reduction in Rural Areas
Authors: Rusliyadi Muhamad , Libin Wang
Published: April 2021

The purpose of this chapter is to provide an overview description of important differences in agricultural development China and Indonesia in poverty reduction efforts in rural areas and some strategy. This chapter hopes to provide an objective picture of the development from agricultural sector level of evidence both Indonesia and China. China and Indonesia are agriculture-based countries with a program of integrated rural development as a whole to be a target of poverty reduction programs. Several farm programs related to poverty alleviation have been launched and had a good impact or significance, especially in China that is able to reduce extreme poverty from 30% in 1978 to less than 3% in 2008. Certainly many lessons can be obtained from this success, especially the concept and strategy development in rural China to be a reference of other states in its development model, especially for poverty alleviation programs.
Platform Ecosystems for Smart Cities in Indonesia
Authors: Mahesa Restu , Yudoko Gatot , Anggoro Yudo
Published: April 2021

This chapter aims to discover major constructs and proposing the model of platform ecosystems for Indonesia smart cities and applies the mixed methods research paradigm. The theory building uses inductive qualitative phase and literature review from global smart cities to suggest the hypothesized model. The pilot test has revealed a new construct “cultural systems” which is unique for the Indonesian context with high significance result. The final survey was followed by 1,021 respondents in six of Indonesia major cities, namely Medan, Jakarta, Semarang, Surabaya, Makassar, and Samarinda. The model testing in quantitative phase has investigated 12 hypotheses derived from the structural model. The investigation result reveals that 10 hypotheses are supported, and two hypotheses are rejected. Two constructs “political leadership” and “smart urban services” are confirmed to act as multiple mediating variables. The theoretical framework and propositions are claimed as the novelty of this research and extending the knowledge of urban sustainability.
A Differentiation of Restaurant Types Based on Customers' Perceived Attributes
Authors: Nghiêm-Phú Bình , Watanabe Erika DeJong
Published: April 2021

The understanding of the differences between/among types of restaurants is important with the effective management of the involved businesses. Nonetheless, a meaningful definition and differentiation of each and every type of restaurant is largely missing. Therefore, this study aims to differentiate and define the existing categories of restaurants in a tourism and travel setting. In order to obtain this objective, this study opts to collect and analyze customer reviews to reveal the external attributes that they prioritize. From there, comparisons are made to see whether different types of restaurants are attributed to different characteristics or not. After that, definition of each type of restaurant is proposed. Using reviews about restaurants in Tokyo posted on tripadvisor.com, this study confirmed that the categorization of restaurants according to price and value is a valid and reliable practice. Definitions of restaurant types were then conceptualized. Practical and theoretical implications of this study were also discussed.
Safety of a Nurse-Driven Standardized Potassium Replacement Protocol in Critically Ill Patients With Renal Insufficiency
Authors: Conley Rebecca , Rich Rebecca L. , Montero Jennifer
Published: April 2021

Background

In critically ill patients, maintaining appropriate serum potassium concentrations requires careful supplementation to correct hypokalemia but avoid hyperkalemia. At the study institution, an institution-based, nurse-driven standardized electrolyte replacement protocol is used in critically ill patients with a serum creatinine concentration of 2 mg/dL or less. If the serum creatinine concentration is greater than 2 mg/dL, electrolyte replacement requires a physician order.

Objective

To determine if standardized potassium supplementation is safe in critically ill patients with renal insufficiency not requiring renal replacement therapy.

Methods

This study was an institutional review board–approved, single-center, retrospective evaluation of critically ill patients receiving intravenous potassium replacement per protocol. Patients were grouped according to serum creatinine concentration (≤ 2 mg/dL or > 2 mg/dL) at the time of replacement. The primary outcome was the incidence of hyperkalemia (potassium concentration ≥ 5 mEq/L) following potassium replacement. Secondary outcomes were the incidence of hyperkalemia, change in serum potassium concentration, and need for hyperkalemia treatment. Outcomes were analyzed using χ2 and t tests.

Results

Of 814 patients screened, 145 were included (99 with serum creatinine ≤ 2 mg/dL and 46 with serum creatinine > 2 mg/dL). The incidence of hyperkalemia was not different between groups (P = .57). Five patients experienced hyperkalemia; none received hyperkalemia treatment. Change in serum potassium was similar for patients in the 2 groups (P = .33).

Conclusions

A standardized, nurse-driven electrolyte replacement protocol can be used safely in critically ill patients with renal insufficiency not requiring renal replacement therapy.
Recurrent tracheal tumor with a critical airway requiring ‘Y’ stent – unique presentation of tuberculosis
Authors: Jaganathan Venugopal , Subramanian Santhakumar , Hari Deepak T
Published: April 2021

Tracheal tumor is a rare entity. Tracheal tumor may be a primary tracheal tumor or secondary to invasion from a mediastinal tumor (or a lymph node). These tumors are prone to cause critical airway obstruction which may require urgent care. Tuberculosis is one of the common differential diagnoses of mediastinal lymphadenopathy in TB endemic countries, though isolated tuberculous mediastinal lymphadenopathy without a lung involvement is rare. We report an extremely rare case of isolated paratracheal lymphadenitis due to tuberculosis, eroding the trachea and presented a lower tracheal tumor, which recurred again after complete debulking. Finally, the disease required a ‘Y’ stent placement, to stabilize the airway following the second recanalization. We discuss the incidence, differential diagnosis, and the bronchoscopic, interventional aspects of this entity.
Table of Contents Vol 76, No 1 (2020)
Authors: Office Editorial
Published: April 2021

No abstract available.
Initiating and Secondary Mechanisms of Hypertension along the Time Course
Authors: Ma Zhi-Yi
Published: April 2021

Abstract

Due to the difference in drug treatment strategies between the “2020 International Society of Hypertension Global Hypertension Practice Guidelines” and the “Expert consensus on the management of hypertension in the young and middle-aged Chinese population” consensus, I made a hypothesis on hypertension mechanisms. The mechanisms behind hypertension differ between age groups. For instance, the sympathetic nervous system might play more important role young and middle-aged hypertensive patients. In this commentary, hypertension mechanisms were classified into initiation and secondary mechanisms. Thereafter, their quantity-effect relationship was speculated. These helped deepen the understanding of the time association and the crosstalk mechanisms.
The Changing Paradigm of Injuries and their Outcome in an International Conflict Zone
Authors: Sharma Pawan , Sharma Abhishek , Rao K. R.
Published: April 2021

Background:

The characteristics of combat injuries differ from those encountered in civilian practice in terms of epidemiology, mechanism of wounding, pathophysiology, trajectory after injury and outcome. Furthermore, the nature of combat injuries is likely to change because of changes in the ways wars will be fought; such changes may influence therapeutic tactics and techniques, and military medical planning and logistics. Proper medical deployment at various peacekeeping missions requires projecting injuries. For this reason, the injury patterns and mechanism of injury were reviewed over a five year period, and injury rates and mechanisms were extracted for review.

Methods:

An observational study of 2942 trauma cases attending trauma Out Patient Department and emergency centre of United Nations Peacekeeping Mission Hospital in eastern DRC (Democratic Republic of Congo), was carried out from Jan 2009 to Dec 2013. The study includes age profile of patients along with the distribution and mechanism of injuries.

Results:

Penetrating injuries and blunt injuries accounted for 4.65% and 95.35% respectively of the total injuries sustained. The majority of the patients sustained injuries like mixed burns and inhalation injuries, assaults and contusions (84.33%). The most common age group affected was 22- 29 years (60.74%).

Conclusions:

The data clearly demonstrate that humanitarian and peacekeeping missions require preparation for a wide variety of mechanisms of injuries including non-combat trauma beyond the expected penetrating missile and blast injuries of a typical war scenario.
Communication for Plug-in Vehicles as a Distributed Energy Source
Authors:   Hybrid - EV Committee
Published: April 2021

This document applies to a plug-in electric vehicle (PEV) which is equipped with an onboard inverter and communicates using IEEE 2030.5-2018. It is a supplement to the SEP2 standard, which supports the use cases defined by SAE J2836/3. It provides guidance for the use of the SEP2 distributed energy resource function set with a PEV. It also provides guidance for the use of the SEP2 flow reservation function set, when used for discharging. It is not intended to be a comprehensive guide to the use of SEP2 in a PEV.

Note that in this document, SEP2 is used interchangeably with IEEE 2030.5-2018.
Contribuţii la studiul vegetaţiei forestiere din rezervaţia naturală Pădurea Roşoşa, județul Suceava
Authors: Tomescu Cezar Valentin , Irimia Irina
Published: April 2021

Acest studiu prezintă diversitatea floristică a vegetației Forestiera identificată în rezervația naturală Pădurea Roșoșa. Fitocenozele identificate au fost încadrate în 3 asociații vegetale: Leucanthemo waldsteinii-Fagetum (Soó 1964) Täuber 1987, Hieracio transsylvanici-Piceetum Pawlowski et Br.-Bl. 1939, Hieracio transsylvanici-Abietetum (Borhidi 1971) Coldea 1991. Acestea aparțin la două categorii de habitate de interes comunitar Natura 2000: 91V0 – Păduri dacice de fag (Symphyto-Fagion) și 9410 - Păduri acidofile de molid (Picea) din etajul montan până în cel alpin (Vaccinio-Piceetea). Analiza comparativă a asociațiilor vegetale identificate ne relevă faptul că spectrele bioformelor, elementelor floristice și a indicilor ecologici au un grad de similaritate foarte ridicat.
Influența detașării frunzelor asupra acurateței măsurării unor parametri fotosintetici la aninul verde
Authors: Popa Andrei
Published: April 2021

Fotosinteza este activitatea de bază pe care plantele o realizează având o importanță ridicată în cadrul altor procese cum ar fi: creșterea, acumularea biomasei, cât și procese concurențiale. Măsurarea schimbului de gaze dintre frunză și mediul extern la nivelul coronamentului este o sarcină dificilă din cauza înălțimii arborilor și a imposibilității de a transporta echipamentul la nivelul coronamentului. Acest studiu a testat posibilitatea de a măsura schimbul de gaze pe frunzele detașate, pe frunzele atașate de un lujer detașat și pe frunzele atașate de un lujer detașat, dar introdus într-un recipient cu apă imediat după detașare. Specia pe care s-a efectuat studiul a fost aninul verde (Alnus viridis (Chaix) DC.) datorită înălțimii accesibile și a importanței acesteia în cadrul ecosistemelor montane. În primele două situații, din cauza deficitului de apă la nivelul frunzelor, s-a constatat o scădere a asimilării nete (A), transpirației (E), conductanței stomatale (gsw) la scurt timp după detașare. În a treia situație când lujerul a fost plasat într-un recipient cu apă nu au existat schimbări semnificative privind procesele fotosintetice, parametrii s-au menținut la peste 80% de valoarea inițială.