bluuebunny/crossref_metadata_2025 huggingface dataset:
Sala de aula invertida e rotação por estações utilizando as ferramentas Google no curso técnico de automação industrial
Authors: Cimirro Bruno Fraga , Bleicher Sabrina
Published: July 2021

O presente artigo tem como propósito relatar uma experiência que utilizou metodologias do ensino híbrido no curso técnico de Automação Industrial do SENAI de Tubarão, na unidade curricular de Hidráulica e Pneumática II. Para implementar essa ação fez-se uso dos modelos de sala de aula invertida e também de rotações por estações. Como suporte tecnológico virtual foram adotados recursos do Google Classroom. Ao final da experiência foi realizada uma avaliação com os estudantes envolvidos para verificar sua percepção em relação à prática adotada. Como resultado, foi possível identificar as potencialidades, problemas enfrentados e a opinião dos alunos em relação à execução da metodologia. Constatou-se que, independentemente das dificuldades enfrentadas no decorrer da experiência, existe a necessidade de ações inovadoras, que efetivem os estudantes como protagonistas na construção do conhecimento, e possibilitem o dinamismo, a interatividade e a colaboração no espaço de aprendizagem, contribuindo para a formação dos mesmos.
Systemic representation of idea management
Authors: Valdati Aline de Brittos , De Souza João Artur , Dandolini Gertrudes Aparecida
Published: July 2021

This paper presents the proposal for a framework to represent Idea Management (IM) in a systemic way, aligned with organizational structure. It considers Knowledge Management as a supportive element, in accordance with the practices of Open Innovation. Organizational capacity to stimulate innovation depends on the collection of ideas and their management. The systematic collection of external ideas has become popular due to the need of organizations to exchange internal and external inputs. However, collection alone cannot generate results. IM can act as an integrating mechanism between internal and external knowledge so that ideas generated are improved and evolve. For this research, an integrative review of the literature on ideas management was conducted following the parameters of Torraco (2005). For the construction of the proposed framework, based on Regoniel (2015), the important elements were selected, that is, elements described in the literature were identified and analysed to discover how they are related. Subsequently, the proposed framework was structured into three levels, with strategy as a central element. The first level refers to the supportive elements: Processes, People, Technology and Knowledge Management (KM). The second refers to the stages of IM - Preparation, Generation, Collection and Storage, Treatment (filtering and categorization), Enrichment, Evaluation, Selection, Refinement and Feedback and Follow-up. The third level refers to the results. In terms of practical implications, the research contributes to the clarification of the IM in Small and Medium-sized organizations. Ongoing research including verification with experts and field research could serve as guidance for implementation of IM in organizations.
Governança de redes interorganizacionais
Authors: Moreira Fernanda Kempner , Freire Patricia de Sá
Published: July 2021

O objetivo deste artigo é apresentar os mecanismos de governança interorganizacional presentes na literatura. Foi realizada pesquisa bibliografia e revisão sistemática da literatura nas bases de dados WoS e Scopus com os descritores “mechanism* of governance” OR “mechanism* governance”. Foram identificados dois tipos de mecanismos de governança para redes interorganizacionais. Os mecanismos formais são caracterizados pela formalização das relações entre os participantes da rede. Seu principal objetivo é reduzir os riscos envolvidos nas transações em rede, controlar o oportunismo, coordenar as expectativas e comportamentos das organizações da rede e evitar a dissolução de colaborações interorganizacionais. Já os mecanismos informais são caraterizados pelos relacionamentos, e não pela estruturação burocrática. Estabelecem procedimentos flexíveis baseados na confiança e cooperação dos partícipes, o que pode ser mais adequado especialmente quando a formalização se apresenta onerosa e difícil. Buscou-se reunir os mecanismos de governança de redes interorganizacionais relatados na literatura, visando contribuir para o avanço das pesquisas sobre a temática. Não se encontrou nas buscas nenhum artigo que fizesse a relação entre os mecanismos existentes para a governança de redes interorganizacionais. Entendendo-se que o conhecimento destes mecanismos é importante para o uso adequado dos mesmos na governança das redes, o valor desta pesquisa encontra-se não só no quadro resumo dos mecanismos, mas na compreensão de que o uso combinado dos mecanismos formais e informais garantem que a rede alcance resultados mais efetivos, auxiliando, inclusive, na evolução para a rede de aprendizagem.
Remarks on Selecting Length of Cylindrical Sample to Determine Magnetic Properties of its Material
Authors: Sandulyak A.V. , Tkachenko R.Yu. , Sandulyak D.A. , Sandulyak A.A. , Polismakova M.N. , Ershova V.A.
Published: July 2021

When experimentally studying magnetic properties of the ferromagnetic materials, preferences are often given to a more convenient method involving the use of sufficiently long cylindrical samples with the L length and the D diameter placed in the solenoid field as an alternative to the method based on using classical samples of the toroidal shape (to exclude manifestations of the demagnetizing factor). Currently, required justification is practically missing for specific values of the relative L/D length, which would indicate such [L/D] values (for L/D ≥ [L/D]), at which magnetic properties of a sample (already long enough) correspond to magnetic properties of its material. While the existing recommendations such as [L/D] = 50 are postulated, let us note that relevant experimental studies of magnetic properties of the cylindrical samples with the L/D parameter targeted variation were not made. An attempt was made to fill this gap. For cylindrical steel samples with the different L/D values (from 1 to 50), families of the B magnetic induction and of the μ permeability field dependencies were obtained experimentally using the ballistic method. The sought [L/D] values were determined from the B and μ dependencies on the L/D by the junction abscissa of the ascending and self-similar branches. It was established that in the accepted field strength in the range of H = 0.94--54.2 kА/m magnetizing field, the [L/D] parameter is a variable substantially depending on H (and/or μ). It varies from [L/D] = 10--15 at H = 54.2 kA/m (μ = 30) to [L/D] = 50--60 at H = 4.7 kA/m (μ = 270). And at H < 4.7 kA/m, [L/D] > 50--60, i.e., more than is commonly believed. Thus, it was stated that the data on magnetic properties obtained when using even long samples (L/D = 50) and declared as data on the magnetic properties of the corresponding material, are only close to those with H < 4.7 kA/m. Phenomenological expressions were obtained for the [L/D] determination: exponential with the H argument and logarithmic with the μ argument
Methods of Detecting Communities with Certain Relationship Typesin Graphs using Billing Information
Authors: Virtseva N.S. , Vishnyakov I.E. , Ivanov I.P.
Published: July 2021

Currently, one of the urgent tasks of graph analysis is community detection. A large number of algorithms have been developed for detecting communities in graphs. Meanwhile, these communities have nothing to do with groups of people, i.e., family, colleagues, friends, and are used to simplify the graph representation. For a large number of tasks, it is useful to detect a group of people who closely communicate with each other. Many algorithms for detecting communities do not take into account that one participant can belong to several communities, and this is a prerequisite for detecting social circles. The paper overviews the main approaches to community detection, and among these emphasizes the approaches based on functionality optimization, clique problem, cluster analysis and label distribution. The approaches based on the analysis of ego-networks, i.e., considering the subgraph formed by the connections of one participant, are considered separately. The study gives the basic algorithms that are applicable for the selection of communities with certain relationship types based on billing information. Findings of research are useful for community detection depending on the task and available input data
Demyelinating diseases of the central nervous system in children: lecture for practicing pediatricians
Authors: Kotov A. S. , Panteleeva M. V. , Mukhina E. V.
Published: July 2021

Demyelinating diseases (DD) are autoimmune disorders that morphologically manifest mainly with myelin destruction in the central nervous system (CNS). Recently, there has been a continuous increase in DD of the CNS, including those in the pediatric population. Despite the active development of strategies for the diagnosis of DD and verification of its forms, the differential diagnosis of DD and other diseases associated with abnormalities in the brain white matter structure on magnetic resonance imaging continues to be problematic. We examined 123 patients with suspected DD CNS. The diagnosis was confirmed in 102 of them. The most common form of DD CNS was multiple sclerosis found in 79 of 102 subjects. Much less frequent were anti-MOG-associated disorders (5 patients), neuromyelitis optica spectrum disorders (3 patients), and acute disseminated encephalomyelitis (2 patients). The main clinical, laboratory and neuroimaging characteristics of each of these disorders and the main difficulties in the treatment of pediatric patients with DD CNS are described.
Examination of compassion levels of special education teacher candidates in terms of some socio-demographic variables
Authors: Nuri Cahit , Varol Begumsu , Direktor Cemaliye
Published: July 2021

Abstract

The scope of this study is to examine the relationship between compassion and effective teaching qualities of special education teacher candidates. The working group of the research consists of the special education teacher candidates who are in the Turkish Republic of Northern Cyprus and studying in the special education department of the universities in the spring term of 2019-2020.  Since it was aimed to determine the compassion levels and effective teacher qualities of special education teacher candidates in the study, the screening model was used as one of the quantitative research methods.  In the study, 315 special education teacher candidates participated. “Demographic information form” and “Compassion Scale”, were applied to special education teacher candidates in the study in question. According to the results of the study, it was observed that female special education teacher candidates had higher levels of compassion compared to male special education teacher candidates.  According to the age group, the compassion levels of students/teacher candidates aged 18-20 years were higher than those who are 24 years and older. In the study, it was determined that the difference between the scores obtained by the students from the Disconnection sub-scale of the compassion scale according to the family structure was statistically significant.

 

Keywords: Compassion, Effective Teacher Skills, Candidate Teacher, Special Education.
Planificando la transición agroecológica para la Seguridad Alimentaria y Nutricional en el resguardo Muisca de Chía.
Authors: Benavides Ocampo Sergio Antony , Acevedo Osorio Álvaro
Published: July 2021

La sociedad actual enfrenta fuertes desafíos para garantizar la Seguridad Alimentaria y Nutricional (SAN), especialmente en comunidades rurales e indígenas. Este estudio construye las bases para un proceso de transición agroecológica con el fin de aportar a la garantía de la SAN en familias agricultoras del resguardo indígena Muisca de “Fonquetá y Cerca de Piedra” en Chía-Cundinamarca (Colombia). Se analizaron las limitaciones y potencialidades del contexto territorial y las familias agricultoras, para emprender un proceso hacia la transición agroecológica, que se concibe como un proceso complejo de cambio desde una forma convencional de producir alimentos hacia una forma alternativa de agricultura sostenible de base agroecológica. Se planteó una metodología participativa con enfoque mixto que identificó categorías de análisis a partir de un marco de análisis para la SAN con enfoque agroecológico. El trabajo se realizó con 13 familias del resguardo indígena dedicadas a la agricultura familiar con un total de 45 personas. El 23% de los predios familiares se encuentra sembrado con cultivos alimentarios, aromáticas, medicinales y/o plantas de uso ritual y se ubican en general en estadías iniciales de la transición, aunque algunas presentan fortalezas en etapas avanzadas. A pesar de las situaciones negativas como la falta de apoyo económico desde el cabildo o el municipio y la escasez de personas para cultivar, existe un interés marcado por producir alimentos conservando el ambiente y su cultura, así como un conjunto de saberes que deben ser promovidos desde el resguardo indígena para repensar la SAN desde la colectividad. Se concluye la necesidad de dar un giro en el concepto institucional de la SAN abordado en este estudio, hacia el concepto de Soberanía Alimentaria, dado su carácter holístico, sistémico, situado, integrador y de derechos que promueve la transición agroecológica.
Pharmacological aspects of acute treatment glycoside intoxication
Authors: Sperling M. I. , Kruchinin E. G. , Gogolevsky A. S.
Published: July 2021

Despite the active introduction of surgical treatments for cardiac pathology and new synthetic cardiotonic drugs, cardiac glycosides (CG) remain an important component of the pharmacological treatment of heart diseases. Moreover, interest in this group of drugs is only increasing with the discovery of new pharmacological effects, such as antitumor and antiviral. However, despite many years of experience, the issue of managing patients with symptoms of both acute and chronic poisoning with cardiac glycosides remains one of the leading ones. The literature review provides a brief historical outline of cardiac glycoside poisoning and comprehensively describes the pharmacokinetics and pharmacodynamics of this group of drugs. The clinical picture of intoxication is described. We analyzed modern ideas and limitations of using antidote therapy such as digoxin immune Fab-antibody fragments, as well as the features of pathogenetic and symptomatic treatment of patients with acute glycoside poisoning.
Der satirische Agon - Das erste Satirenbuch des Horaz als agonale Mischgattung und als Dispositiv der Macht
Authors: Langbein Florian
Published: July 2021

Das erste Satirenbuch des Horaz ist nach einhelliger Forschungsmeinung eine Mischung verschiedener literarischer Gattungen. In dieser Dissertation werden erstmals die Wortgefechte im Satirenbuch untersucht und die Einflüsse anderer agonaler Gattungen (Epos, Tragödie, Komödie) festgestellt. Weiterhin wird das Satirenbuch als politisch erwiesen nach Foucaults Dispositiv der Macht.
"Tá se achando feio? Autoestima lá embaixo? Ah, vem pra Rondônia!”
Authors: Mota Ilka de Oliveira
Published: July 2021

Apoiado na perspectiva discursiva da linguagem na interface com os estudos propostos por Sigmund Freud sobre o campo da comicidade, o presente artigo busca compreender as representações imaginárias construídas sobre o estado de Rondônia e seus habitantes a partir de dois textos humorísticos: a) uma apresentação do humorista Rafinha Bastos e b) um texto intitulado Desciclopédia, uma espécie de enciclopédia às avessas. Os resultados da análise empreendida apontam para o fato de que Rondônia e seus habitantes são subjetivados no lugar discursivo do que é considerado historicamente “feio” e “sujo”, o que corrobora sentidos pejorativos para o estado. Neste caso, confirma-se a tese freudiana de que o campo da comicidade também serve para a produção de sentimentos hostis e agressivos.
Factors Related to the Level of Health Literacy in Patients with Hypertension: Literature Review
Authors: Prambudia Rezkisa Dwi , Widyawati Ika Yuni , Has Eka Misbahatul Mar'ah
Published: July 2021

Introduction: Hypertension is the leading cause of death worldwide. People with hypertension often receive health education about their health but cannot implement it. Patients with hypertension must be responsible for self-management related to the level of a person's health literacy, such as efforts that should they take so that the illness they suffer from is not getting worse. The aim of this study is to determine the factors related to the level of health literacy in hypertensive patients.Methods: Search for articles and journals conducted in the last ten years, from 2010-2020 and published on the internet using Scopus, Science Direct, ProQuest, Pubmed, Google Scholar, Portal Garuda, and SINTA by using chosen keyword adjusted to the Medical Subject Heading (MeSH) and Indonesian Thesaurus, namely, "factors", "health literacy", " After analysis and tabulation from some of the articles and journals, there are several factors related to the level of health literacy in hypertensive patients such as, education, age, job, income, knowledge, acculturation, self-management efficacy, HBPM (Home Blood Pressure Measurement), regular use of medicine, systolic blood pressure, health service access, health information access, and social support.Results: There are several factors related to the level of health literacy in patients with hypertension after analyzing journals or articles .. This study is expected to increase knowledge for nurses about the level of health literacy of hypertensive patients. acculturation, self-management efficacy, HBPM (Home Blood Pressure Measurement), regular use of medicine, systolic blood pressure, health service access, health information access, and social support. Discussion: There are several factors related to the level of health literacy in patients with hypertension after analyzing journals or articles .. This study is expected to increase knowledge for nurses about the level of health literacy of hypertensive patients. acculturation, self-management efficacy, HBPM (Home Blood Pressure Measurement), regular use of medicine, systolic blood pressure, health service access, health information access, and social support.Conclusion: There are several factors related to the level of health literacy in patients with hypertension after analyzing journals or articles. This study is expected to increase knowledge for nurses about the level of health literacy of hypertensive patients.
A Simplified Integration of Multi-Channel Ultrasonic Guided Wave System for Phased Array Detection and Total Focusing Imaging
Authors: Lyu Yan , Hong Huaxing , Song Guorong , He Cunfu
Published: July 2021

Ultrasonic guided waves based on sensors array effectively improve the detection sensitivity of defects and realize the intuitive imaging of defects. In this research, a 16-channel guided wave excitation/acquisition system is simply integrated for the array focusing detection. Using a FPGA (Field Programmable Gate Array) as the main control unit, a high-voltage excitation of a multi-channel tone-burst signal with synchronous signal acquisition is designed. Experiments are conducted by the developed multi-channel system and the piezoelectric linear array. A guided wave phased array and the total focusing imaging algorithm are demonstrated on a 1mm aluminum plate. The experimental results show that the system can meet the practical requirements of guided wave array focusing detection. By combining the total focusing method and the phase-based sign coherence factor, the compounded image shows that the artifacts can effectively be reduced, and the contrast is improved. Meanwhile, this system can solve the problem of distributed sensor array detection, in which the process is cumbersome and inefficient previously. Through the system and the sensor array, the guided wave phased focusing method and the composite total focusing method can effectively improve the sensitivity and the positioning accuracy of defect detection in thin plate.
Free Vibration and Frequency Calculation in Tall Buildings with Stepped Tube-in-Tube Systems
Authors: Babaei Mohammad , Mohammadi Yaghoub , Ghannadiasl Amin
Published: July 2021

This study investigates the free vibration and frequency analysis of tall buildings with stepped cross-sections for stepped tube-in-tube structures. Dynamic equations were presented in accordance with the stepped structural system for free vibration and the differential equations were solved according to the application of boundary conditions and flexural and shear stiffness and stepped cross-section of different steps. The answer was converted to an 8x8 matrix and was obtained using the determinants of matrix and mathematical calculations of frequency. Nine mathematical computational models were designed for stepped tube-in-tube structures for a 50-story tube-in-tube building by increasing the height of the outer tube by 15 meters. Finally, the heights of the inner and outer tubes were equalized by increasing the height of the outer tube and then compared with the results of free vibration in the articles with the tube-in-tube structural system with equal height and characteristics. Using this method, the frequency of structures was calculated correctly and the obtained results from finite element analysis showed that this mathematical method accurately calculated the frequency. It was found that this method was accurate enough and the obtained computational error was very small. The results showed that the frequency decreases by adding to the outer tube and increasing its height.
Model and Characteristic Simulation Analysis of a Two-Speed Transmission System
Authors: Chen Zhigang , Xie Feng , Liu Zhihui , Yan Hongzhi
Published: July 2021

One of the main tasks in the research of a helicopter two-speed transmission system was to improve its dynamic characteristics. For the low gear mode of the system, a dynamic model was established by using the lumped parameter method, the method of Runge-Kutta was used to solve the nonlinear dynamic system equations. The effect of the gear module on the dynamic transmission error, dynamic load of the gear pair and the dynamic windup angle of a one-way clutch were studied. And the effect of the one-way clutch torsional stiffness on the dynamic transmission error and dynamic load of the gear pair was also studied. The results show that: 1)~the dynamic transmission error of the gear pair decreases and the dynamic load of the gear pair increases with the increase of the gear module at the lower range of excitation frequencies; 2)~the dynamic windup angle of the one-way clutch increases with an increase of the gear module. 3)~the dynamic transmission error of the gear pair and the maximum dynamic load increases with an increase of the one-way clutch torsional stiffness at the lower and medium range of excitation frequencies. The above results can provide reference for the subsequent upgrade and improvement of the two-speed transmission system.
ASSESSING WORK PERFORMANCE IN THE HOTEL INDUSTRY
Authors: Črnjar Kristina
Published: July 2021

Organizacije u ugostiteljstvu i turizmu ood pritiskom globalizacije i sve veće konkurencije doživljavaju velike promjene. U cilju opstanka, razvoja i poboljšanja kvalitete organizacije će morati graditi svoju konkurentnost prvenstveno oslanjajući se na vlastite zaposlenike i njihovo znanje. Čovjek, kao resurs kojim treba upravljati svojim će radom stvarati novu vrijednost za poduzeće. U članku se raspravlja o ljudskom kapitalu te praćenju i ocjenjivanju radne uspješnosti u hotelskoj industriji.
PERFORMING INFORMATION SYSTEM AS A BASIS FOR RESTRUCTURING BUSINESS AND PROCESS FUNCTIONS OF THE HOTEL
Authors: Galičić Vlado
Published: July 2021

Zbog brzih promjena vanjskih uvjeta poslovanja, zaoštravanja gospodarskih kriterija i suvremenog sustava obračuna troškova, te na kraju zbog postizanja željenog stupnja konkurentske sposobnosti hotelskih poduzeća, značajna je primjena informacijskih tehnologija koja u ovom trenutku u hrvatskoj hotelskoj industriji nije još na zadovoljavajućoj razini. Informacije su postale najvažniji upravljački resurs, a pravodobna i točna informacija daje mogućnost pravodobne i brze reakcije. Na svom putu od nastajanja, preko raznih hijerarhijskih instanci, informacije su gotovo uvijek dolazile iskrivljene ili suviše kasno da bi bile osnova za kvalitetne i pravodobne odluke. Nova poslovna filozofija traži novu poslovnu organizaciju, a informacijska tehnologija mora biti u funkciji i poslovne filozofije i poslovne organizacije.
Mandatory cost and other cost coming from the adoption of quality certifications in the hospitality business
Authors: Sánchez Rebull M. Victoria , Hernández Ana Beatriz , Banchieri Lucia , Campa Planas Fernando , Ginieis Matias
Published: July 2021

The adaptation to the regulation of hospitality business implies a relevant cost in the profit and loss account. Additionally, some companies in this business decide to add some voluntary quality and environmental certification systems, which also yields to increased costs. The purpose of this paper is to quantify these costs and to analyse if the hotel size influences them. A total of 67 different costs were considered in hotels of all sizes, in the region of Catalonia as one of the most relevant touristic markets in Europe. Data were collected from the regulation applied to the hospitality sector, from specialised consultant companies and from a questionnaire supplied to 472 hotels in August and September 2008. The main results of this study show that the unitary cost by room, considering both, compulsory and voluntary costs, is lower in big hotels. On the other side, the smaller hotels are suffering high unitary costs. These results could be useful for the strategic orientation of hotels due to the relevance of costs to determine the competitive position of a firm. The main contribution of this work is to analyse the effects of compulsory costs and voluntary cost derived from the implementation of quality and environmental certifications in the hospitality sector, which could strongly affect the performance of this industry.
The effects of selected macroeconomic variables on the presence of foreign hotels in Croatia
Authors: Novak Mili , Petrić Lidija , Pranić Ljudevit
Published: July 2021

While an increasing number of hotel firms expand their operations abroad, it is not always clear how hoteliers select one country over another. Thus, the purpose of this research is to investigate the influence of inward foreign direct investment, market interconnectedness, and tourist flows on the entrance of foreign hotels in Croatia. Research was carried out via time-series analyses of the secondary data to a sample of foreign hotels from 35 countries with operations in Croatia during the 1997-2007 period. Statistical analyses were performed by way of correlation and regression. Study findings suggest that inward foreign direct investment, market interconnectedness and tourist flows are highly positively correlated with the presence of foreign hotel companies in Croatia. Additional examination is performed separately on hotels in foreign ownership and hotels operating under foreign brand, producing different results. Namely, from the host country perspective, it is difficult to analyze in the same way hotels with foreign ownership share and hotels operating under a foreign brand. Therefore, a foreign hotel is defined as either a foreign-owned hotel (i.e., a hotel present in Croatia by share of ownership above 10%) or a foreign hotel brand (i.e., by franchise or management contract, lease agreement or consortium). This is one of the few studies to explore some important macroeconomic variables that have not been considered in previous research in the international lodging sector.
Evaluation of congress performance and congress attendees' satisfaction - a case study of Novi Sad (Serbia)
Authors: Dragićević Vanja , Stankov Uglješa , Armenski Tanja , Štetić Snežana
Published: July 2021

The congress industry is a young, dynamic industry, which is growing and maturing at a rapid rate. It is now a truly international industry, witnessing huge investments across all continents. Due to economic and other benefits of a more intangible nature, the number of congress destinations and venues worldwide is growing. In order to provide the sustainability of congress destinations and venues, it is important to examine congress delegates’ experience, their overall satisfaction as well as behavioural intentions regarding destination. This study was conducted in the city of Novi Sad, which is after Belgrade the most important international meeting destination in Serbia. The purpose of this study is to examine the experience and overall satisfaction of the attendees at international congresses held in Novi Sad. Also, the relationship between overall satisfaction, word-of-mouth and intention to return were examined. A questionnaire survey was used as an instrument for the study. The collected data were analyzed using SPSS standard package. The results showed high level of attendees’ satisfaction with the congress elements and with destination choice. Also, the results confirmed that Novi Sad has a great potential for development of congress tourism, as the majority of the respondents show great interest to visit Novi Sad again and they would recommend city as a meeting destination. The results of this study are valuable for congress centre managers and for destination management organizations.
Comparative analysis of budgeting in the Slovene hotel industry
Authors: Ivankovič Gordana , Jerman Mateja
Published: July 2021

The main purpose of the presented research was to investigate whether Slovene hotels that have a business strategy and strategic management accounting are more successful in comparison with those that still do not have a long-term business strategy and strategic management accounting.Hotels that have a business strategy and strategic management accounting are expected to be more successful in comparison with those that still do not have a long-term business strategy. Questionnaires were distributed to the management of selected Slovene hotels. The Slovene budgeting practices were assessed in Slovene large hotels, which have more than 100 rooms. The analysis was performed at the beginning of the years 2004 and 2008, respectively. Budgeting practices in Slovene hotels were assessed by analyzing the extent to which managers used strategic management accounting and the extent to which business strategies were implemented. The analysis provides evidence that hotels with a long-term business strategy are more successful than those that that have a short-term strategy, or are even without one. Although an improvement in the field of continuous budgeting in the five-year period can be ascertained, only a minority of Slovene hotels uses standard cost as a basis for budgeting. This was the first study that ascertained discrepancies between Slovenian budgeting practice and foreign best practices, which is undoubtedly of great interest for decision-makers on the level of individual hotel.
Beyond Misperception–Two Types of Mental Model Errors in a Dynamic Decision Task
Authors: Schaffernicht Martin FG. , López-Astorga Miguel , Rojas-Barahona Cristian A. , Castillo Ramón D.
Published: July 2021

This article contributes to research on mental models and how they underpin decision policies. It proposes a framework for the joint use of mental models of dynamic systems and the theory of mental models initiated by Johnson–Laird and defines two types of errors: (1) misrepresentation of the system’s structure, and (2) failure to deploy relevant mental models of possibilities. We use a dynamic decision task based on Moxnes’ “reindeer experiment” to formulate three intuitive policies, their underlying mental models, and the reasoning, and evaluate the policies under varying initial conditions. Each of the policies generates problematic behaviors like dependance on initial conditions, underperformance because of flawed goal setting and oscillation due to leaving the delay in a feedback loop out of account. We identify errors of both types in the mental models and relate them to the behavioral problems. Limitations and questions for further research conclude the paper.
Mechanism of the Sleeper-Ballast Dynamic Impact in Void Zones
Authors: Sysyn Mykola , Przybylowicz Michal , Nabochenko Olga , Liu Jianxing
Published: July 2021

Unsupported sleepers or void zones in ballasted tracks are one of the most recent and frequent track failures. The void failures have the property of intensive development that, without timely maintenance measures, can cause the appearance of cost-expensive local instabilities like subgrade damages. The reason of the intensive void development lies in the mechanics of the sleeper and ballast bed interaction. The particularity of the interaction is a dynamic impact that occur due to void closure. Additionally, void zones cause inhomogeneous ballast pressure distribution between the void zone and fully supported neighbour zones. The present paper is devoted studying the mechanism of the sleeper-ballast dynamic impact in the void zone. The results of experimental in-situ measurements of rail deflections showed the significant impact accelerations in the zone even for light-weight slow vehicles. A simple 3-beam numerical model of track and rolling stock interaction has shown the similar to the experimental measurements dynamic interaction. Moreover, the model shows that the sleeper accelerations are more than 3 times higher than the corresponding wheel accelerations and the impact point appear before the wheel enters the impact point. The analysis of ballast loadings shows the specific impact behaviour in combination with the quasistatic part that is different for void and neighbour zones, which are characterised with high ballast pre-stressed conditions. The analysis of void sizes influence demonstrate that the impact loadings, wheel and sleeper maximal accelerations appear at certain void depth after which the values decrease. The ballast quasistatic loading analysis indicates more than twice increase of the ballast loading in neighbour zones for long voids and almost full quasistatic unloading for short length voids. However, the used imitation model cannot explain the nature of the dynamic impact. The mechanism of the void impact is clearly explained by the analytic solution using a simple clamped beam. A simplified analytical expression of the void impact velocity shows that it is linearly related to the wheel speed and loading. The comparison to the numerically simulated impact velocities shows a good agreement and the existence of the void depth with the maximal impact. An estimation of the long-term influences for the cases of normal sleeper loading, high ballast pre-stress and quasistatic loading in the neighbour zones and high impact inside the void are performed.
An Approach to Integrating Sentiment Analysis into Recommender Systems
Authors: Dang Cach Nhan , Moreno María N. , Prieta Fernando De la
Published: July 2021

Recommender systems have been applied in a wide range of domains such as e-commerce, media, banking, and utilities. This kind of system provides personalized suggestions based on large amounts of data in order to increase user satisfaction. These suggestions help client select products, while organizations can increase the consumption of a product. In the case of social data, sentiment analysis can help gain better understanding of a user’s attitudes, opinions and emotions, which is beneficial to integrate in recommender systems for achieving higher recommendation reliability. On the one hand, this information can be used to complement explicit ratings given to products by users. On the other hand, sentiment analysis of items that can be derived from online news services, blogs, social media or even from the recommender systems themselves is seen as capable of providing better recommendations to users. In this study, we present and evaluate a recommendation approach that integrates sentiment analysis into collaborative filtering methods. The recommender system proposal is based on an adaptive architecture, which includes improved techniques for feature extraction and deep learning models based on sentiment analysis. The results of the empirical study performed with two popular datasets show that sentiment–based deep learning models and collaborative filtering methods can significantly improve the recommender system’s performance.
High Temperature Magnetic Sensors
Authors: Rokicki Edward , Przysowa Radoslaw , Kotkowski Jerzy , Majewski Paweł
Published: July 2021

Magnetic sensors are widely used in health management systems for turbomachinery, but their applications in the hot zone are limited due to the loss of magnetic properties by permanent magnets with increasing temperature. The paper presents and verifies models and design solutions aimed at improving the performance of an inductive sensor for measuring the motion of rotating objects operating at elevated temperatures (200-1000C), such as compressor and turbine blades. Physical, analog and mathematical models of the interaction of blades with the sensor were developed. A prototype of the sensor was made and its tests were carried out on the RK-4 rotor rig for the speed of 7000 rpm, in which the temperature of the sensor head was gradually increased to 1100C. The sensor signal level was compared to that of an identical sensor operating at room temperature. The heated sensor works continuously producing the output signal whose level does not change significantly. What is more, a set of six probes passed an initial engine test in an SO-3 turbojet. It was confirmed that the proposed design of the inductive sensor is suitable for blade health monitoring of the last stages of compressors, steam turbines as well as previous generation gas turbines operating below 1000C, even without a dedicated cooling system. In real-engine applications, sensor performance will depend on how the sensor is installed and the available heat dissipation capability
Method for Diagnosing the Uneven Settlement of a Rail Transit Tunnel Based on the Spatial Correlation of High-Density Strain Measurement Points
Authors: Li Hu , Xu Qianen , Liu Yang
Published: July 2021

Rail transit tunnels span long distances, are large-scale structures and pass through complicated geological conditions; thus, the risk of uneven settlement cannot be ignored. To address this issue, a method for diagnosing the uneven settlement of regional railway tunnels based on the spatial correlation of high-density strain measurement points is proposed in this study. First, distributed optical fiber sensing technology is implemented to obtain a massive amount of strain data from densely distributed measurement points along regional railway tunnels, and a method for determining the intervals of strain measurement points with strong spatial correlations is proposed based on a support vector machine. Second, combined with the statistical analysis of the influence range of the uneven settlement of a tunnel, an algorithm for diagnosing the uneven settlement of regional railway tunnels based on the spatial correlation of high-density strain measurement points is proposed; this approach realizes the accurate identification of the uneven settlement area of long-distance urban railway tunnels. Finally, the effectiveness of the proposed method is verified by numerical simulation and actual tunnel data.
Study of the Influence of a Nonlinear Control Allocation Frequency Variation on a Quadrotor Tilt-Rotor Aircraft Stability
Authors: dos Santos Murillo Ferreira , Mercorelli Paolo , Honório Leonardo de Mello , da Silva Mathaus Ferreira , Vidal Vinícius Ferreira
Published: July 2021

This paper presents a study on the influence of the frequency variation of a nonlinear1 control allocation technique execution, developed by the author [1], named by Fast Control2 Allocation (FCA) for the Quadrotor Tilt-Rotor (QTR) aircraft. Then, through Software In The3 Loop (SITL) simulation, the proposed work considers the use of Gazebo, QGroundControl, and4 Matlab applications, where different frequencies of the FCA can be implemented separated in5 Matlab, always analyzing the QTR stability conditions from the virtual environment performed in6 Gazebo. TheresultsshowedthattheFCAneedsatleast200HzoffrequencyfortheQTRsafeflight7 conditions, i. e., 2 times smaller than the main control loop frequency, 400 Hz. Lower frequencies8 than this one would case instability or crashes during the QTR Operation.
Indication of Highly Correlated Electron Transport and Mott Insulator in Disordered Multilayer Ferritin Structures (DMFS)
Authors: Rourk Chris , Huang Yunbo , Chen Minjing , Shen Cai
Published: July 2021

Highly-correlated electrons – electrons that engage in strong electron-electron interactions – have been observed in transition metal oxides and quantum dots and can create unusual material behavior that is difficult to model, such as switching between a low resistance metal state and a high resistance Mott insulator state. Tests of devices using a layer-by-layer deposition process for forming multilayer arrays of ferritin (a transition metal (iron) oxide storage protein) have been previously reported that indicate that highly-correlated electron transport is occurring, consistent with models of electron transport in quantum dots. This paper reports the results of the effect of various degrees of structural homogeneity on the electrical characteristics of these ferritin arrays, as well as demonstrating that these structures can provide a switching function associated with the circuit that they are contained within, consistent with the observed behavior of highly-correlated electrons.
Smart Core and Surface Temperature Estimation Techniques for Health-conscious Lithium-ion Battery Management Systems: A Model-to-Model Comparison
Authors: Surya Sumukh , Samanta Akash , Williamson Sheldon
Published: July 2021

Estimation of core and surface temperature is one of the crucial functionalities of the lithium-ion Battery Management System (BMS) towards providing effective thermal management, fault detection and operational safety. While, it is impractical to measure core temperature using physical sensors, implementing a complex estimation strategy in on-board low-cost BMS is challenging due to high computational cost and the cost of implementation. Typically, a temperature estimation scheme consists of a heat generation model and a heat transfer model. Several researchers have already proposed ranges of thermal models having different levels of accuracy and complexity. Broadly, there are first-order and second-order heat capacitor-resistor-based thermal models of lithium-ion batteries (LIBs) for core and surface temperature estimation. This paper deals with a detailed comparative study between these two models using extensive laboratory test data and simulation study to access suitability in online prediction and onboard BMS. The aim is to guide whether it’s worth investing towards developing a second-order model instead of a first-order model with respect to prediction accuracy considering modelling complexity, experiments required and the computational cost. Both the thermal models along with the parameter estimation scheme are modelled and simulated using MATLAB/Simulink environment. Models are validated using laboratory test data of a cylindrical 18650 LIB cell. Further, a Kalman Filter with appropriate process and measurement noise levels are used to estimate the core temperature in terms of measured surface and ambient temperatures. Results from the first-order model and second-order models are analyzed for comparison purposes.
Chloroplast Genome of Phyllanthus Emblica and Leptopus Cordifolius: Comparative Analysis and Phylogenetic within Family Phyllanthaceae
Authors: Rehman Umar , Sultana Nighat , . Abdullah , Jamal Abbas , Muzaffar Maryam , Poczai Peter
Published: July 2021

Family Phyllanthaceae is one of the largest segregates of the eudicot order Malpighiales and its species are herb, shrub, and tree, which are mostly distributed in tropical regions. Certain taxonomic discrepancies exist at genus and family level. Here, we report chloroplast genomes of three Phyllanthaceae species—Phyllanthus emblica, Flueggea virosa, and Leptopus cordifolius— and compare them with six others previously reported Phyllanthaceae chloroplast genomes. The species of Phyllanthaceae displayed quadripartite structure, comprising inverted repeat regions (IRa and IRb) that separate large single copy (LSC) and small single copy (SSC) regions. The length of complete chloroplast genome ranged from 154,707 bp to 161,093 bp; LSC from 83,627 bp to 89,932 bp; IRs from 23,921 bp to 27,128 bp; and SSC from 17,424 bp to 19,441 bp. Chloroplast genomes contained 111 to 112 unique genes, including 77 to 78 protein-coding, 30 transfer RNA (tRNA), and 4 ribosomal RNA (rRNA) that showed similarities in arrangement. The number of protein-coding genes varied due to deletion/pseudogenization of rps16 genes in Baccaurea ramiflora and Leptopus cordifolius. High variability was seen in number of oligonucleotide repeats while analysis of guanine-cytosine (GC) content, codon usage, amino acid frequency, simple sequence repeats analysis, synonymous and non-synonymous substitutions, and transition and transversion substitutions showed similarities in all Phyllanthaceae species. We detected a higher number of transition substitutions in the coding sequences than non-coding sequences. Moreover, the high number of transition substitutions was determined among the distantly related species in comparison to closely related species. Phylogenetic analysis shows the polyphyletic nature of the genus Phyllanthus which requires further verification. We also determined suitable polymorphic coding genes, including rpl22, ycf1, matK, ndhF, and rps15 which may be helpful for the reconstruction of the high-resolution phylogenetic tree of the family Phyllanthaceae using a large number of species in the future. Overall, the current study provides insight into chloroplast genome evolution in Phyllanthaceae.
Aurora Borealis Is an Inspiration to the Performance of Nordic Economies?
Authors: Nogueira Manuel Carlos , Madaleno Mara
Published: July 2021

The Nordic countries are practically always well positioned in the main international economic, social and sustainability indices and recommending the scientific literature that the variables that these indices intend to measure translate into sustainable economic growth, with this unprecedented empirical study we intend to verify through the ARDL methodology for space temporal 2004 -2018 if the maintenance of high scores in these indexes translates into effective economic growth. The ARDL methodology has the advantage of giving us short- and long-term coefficients. Using four of the main international indices, we conclude that for Nordic countries for economic growth, economic freedom is of no significance and business-friendly regulation is the most important variable. A fundamental discovery in our study (in which Granger's Causality complements the ARDL methodology) is that these countries have been able to adapt perfectly to the globalization process and that entrepreneurship has worked as an important contribution to the continued economic and social success of these countries, allowing them to continue to enjoy their “Nordic Welfare States” in these uncertain and troubled times. These variables have contributed to its economic and social sustainability.