bluuebunny/crossref_metadata_2025 huggingface dataset:
Frontline clinician concerns during the COVID-19 pandemic: A qualitative inquiry
Authors: Vanderkruik Rachel , Mizrach Helen R. , Crute Sydney , Bliss Cayley C. , Sylvia Louisa G. , Traeger Lara , Hall Daniel L. , Luberto Christina M. , Streck Joanna M. , Stanton Amelia M. , George Nevita , Looby Sara E. , Mehta Darshan H. , Fricchione Gregory L. , Park Elyse R.
Published: April 2021

Objective: The COVID-19 pandemic has strained healthcare systems worldwide, placing a high psychological burden on frontline clinicians. There is an urgent need to better understand their stressors and determine if stressors differ by clinical role. The present study assessed the concerns among frontline clinicians across a large healthcare system during the COVID-19 pandemic to inform the development of tailored supportive services.Methods: From March – June 2020, frontline clinicians across the Mass General Brigham healthcare system were invited to register for an adapted mind-body resiliency group program. Clinicians completed pre- and post-program assessments asking them to report their COVID-19-related concerns. Qualitative data were analyzed in aggregate and by clinical role using content analysis to identify overarching domains.Results: Frontline clinicians’ concerns fall within seven domains: concerns for self, patients, family members, staff, existential concerns, systems-level concerns, and job-level concerns. Concerns for self and existential concerns were most commonly reported across clinical roles. Long-term care clinicians were highly concerned about patients’ wellbeing while rehabilitation therapists were highly concerned about their family members’ health. Across groups, nurse practitioners and physician assistants more often reported job-level concerns. Concerns for staff and systems level concerns were less frequently reported across clinical roles.Conclusions: Frontline clinicians share common pandemic-related concerns, but nuances exist among the concerns most frequently reported across clinical roles. Interventions that offer stress management and resiliency training may be helpful for addressing pandemic-related concerns overall. Future research should determine if tailored support services by clinical role may be warranted.
Public Health Updates: New Dimension in Teaching Learning Practice among Postgraduate Students in Community Medicine
Authors: Sahoo Bimal Kumar , Taywade Manish , Retina Kavi Nila David , Das Ambarish
Published: April 2021

Medical science and public health professions have broaden their vision with obligatory custom to keep track of the day to day advances and events. Things that propel us all the time are the emerging and re-emerging diseases, sudden outbreaks, changing environment, revision and releasing various programmes, schemes, guidelines etc. Simultaneously with the ongoing changes, public health professionals must adapt their approach towards such updates in their teaching and training of postgraduate teaching in community medicine.
The Korean Version of the Fugl-Meyer Assessment: Reliability and Validity Evaluation
Authors: Kim Tae-lim , Hwang Sung Hwan , Lee Wang Jae , Hwang Jae Woong , Cho Inyong , Kim Eun-Hye , Lee Jung Ah , Choi Yujin , Park Jin Ho , Shin Joon-Ho
Published: April 2021

Objective To systematically translate the Fugl-Meyer Assessment (FMA) into a Korean version of the FMA (K-FMA).Methods We translated the original FMA into the Korean version with three translators and a translation committee, which included physiatrists, physical therapists, and occupational therapists. Based on a test-retest method, each of 31 patients with stroke was assessed by two evaluators twice, once on recruitment, and again after a week. Analysis of intra- and inter-rater reliabilities was performed using the intra-class correlation coefficient, whereas validity was analysed using Pearson correlation test along with the Motricity Index (MI), Motor Assessment Scale (MAS), and Berg Balance Scale (BBS).Results The intra- and inter-rater reliabilities were significant for the total score, and good to excellent reliability was noted in all domains except for the joint range of motion of the lower extremity domain of the K-FMA. The MI and MAS scores were significantly correlated with all domains, all with p<0.01. The results for the MI ranged from r=0.639 to r=0.891 and those for the MAS from r=0.339 to r=0.555. However, the BBS was not significantly correlated with any domain, as the K-FMA lacks balance evaluation items.Conclusion The K-FMA was found to have high reliability and validity. Additionally, the newly developed manual for the K-FMA may help minimise errors that can occur during evaluation and improve the reliability of motor function evaluation.
R-squared of a Latent Interaction in Structural Equation Model: A Tutorial of Using R
Authors: Qin Lu , Zhang Jihong , Liang Xinya , Pan Qianqian
Published: April 2021

Mplus (Muthén & Muthén, 1998 - 2017) is one popular statistical software to estimate the latent interaction effects using the latent moderated structural equation approach (LMS). However, the variance explained by a latent interaction that supports the interpretation of estimation results is not currently available from the Mplus output. To relieve human computations and to facilitate interpretations of latent interaction effects in social science research, we developed two functions (LIR & LOIR) in the R package IRmplus to calculate the R-squared of a latent interaction above and beyond the first-order simple main effects in Structural Equation Modeling. This tutorial provides a step-by-step guide for applied researchers to estimating a latent interaction effect in Mplus, and to obtaining the R-squared of a latent interaction effect using the LIR & LOIR functions. Example data and syntax are available online.
Generalized Mean-Field Fractional BSDEs With Non-Lipschitz Coefficients
Authors: Shi Qun
Published: April 2021

In this paper we consider one dimensional generalized mean-field backward stochastic differential equations (BSDEs) driven by fractional Brownian motion, i.e., the generators of our mean-field FBSDEs depend not only on the solution but also on the law of the solution. We first give a totally new comparison theorem for such type of BSDEs under Lipschitz condition. Furthermore, we study the existence of the solution of such mean-field FBSDEs when the coefficients are only continuous and with a linear growth.
Fine-Grained Ontology Reconstruction for Crisis Knowledge Based on Integrated Analysis of Temporal-Spatial Factors
Authors: Ma Xiaoyue , Pengzhen Xue , Matta Nada , Chen Qiang
Published: April 2021

Previous studies on crisis know­ledge organization mostly focused on the categorization of crisis know­ledge without regarding its dynamic trend and temporal-spatial features. In order to emphasize the dynamic factors of crisis collaboration, a fine-grained crisis know­ledge model is proposed by integrating temporal-spatial analysis based on ontology, which is one of the commonly used methods for know­ledge organization. The reconstruction of ontology-based crisis know­ledge will be implemented through three steps: analyzing temporal-spatial features of crisis know­ledge, reconstructing crisis know­ledge ontology, and verifying the temporal-spatial ontology. In the process of ontology reconstruction, the main classes and properties of the domain will be identified by investigating the crisis information resources. Meanwhile the fine-grained crisis ontology will be achieved at the level of characteristic representation of crisis know­ledge including temporal relationship, spatial relationship, and semantic relationship. Finally, we conducted case addition and system implementation to verify our crisis know­ledge model. This ontology-based know­ledge organization method theoretically optimizes the static organizational structure of crisis know­ledge, improving the flexibility of know­ledge organization and efficiency of emergency response. In practice, the proposed fine-grained ontology is supposed to be more in line with the real situation of emergency collaboration and management. Moreover, it will also provide the know­ledge base for decision-making during rescue process.
Citation Indexing and Indexes
Authors: Araújo Paula Carina de , Gutierres Renata Cristina , Hjørland Birger ,   Castanha
Published: April 2021

A citation index is a bibliographic database that provides citation links between documents. The first modern citation index was suggested by the researcher Eugene Garfield in 1955 and created by him in 1964, and it represents an important innovation to knowledge organization and information retrieval. This article describes citation indexes in general, considering the modern citation indexes, including Web of Science, Scopus, Google Scholar, Microsoft Academic, Crossref, Dimensions and some special citation indexes and predecessors to the modern citation index like Shepard’s Citations. We present comparative studies of the major ones and survey theoretical problems related to the role of citation indexes as subject access points (SAP), recognizing the implications to knowledge organization and information retrieval. Finally, studies on citation behavior are presented and the influence of citation indexes on knowledge organization, information retrieval and the scientific information ecosystem is recognized.
Heinrich Triepel – Parteienstaat und Staatsgerichtshof
Authors: von Bogdandy Armin , Mehring Reinhard
Published: April 2021

Heinrich Triepel (1868-1946), full professor in Berlin and founder of the German constitutional law teachers' association, republican by reason and Wilhelmine-influenced monarchist of his heart, commented on the constitutional history of the Weimar years beginning in 1918 and coming to an end in 1933. He focused on fundamental developments that are still being discussed today: basic questions of constitutional policy, problems of the federal state and growing tendencies towards emergency legislation, the party state and constitutional jurisdiction.
Unlike the works of other authors of the "Richtungsstreit", Triepel‘s Weimar writings have not been republished in postwar Germany.
This collection assembles the most important texts, adding some references and annotations. An introduction puts them into a wider context.
It raises the question of Triepel's constitutional position and influence, but it also considers Triepel's historically informed texts as lessons of a constitutional argumentation of lasting interest.

With contributions by
Reinhard Mehring (Introduction) and Heinrich Triepel.
Die Behandlung von Wandelanleihen bei öffentlichen Übernahmen
Authors: Elixmann Philipp
Published: April 2021

Convertible bonds are increasingly gaining attention in the context of public takeovers and raise complex legal issues for the parties involved. Despite the considerable practical relevance, the handling of convertible bonds within the scope of application of the German Securities Acquisition and Takeover Act (WpÜG) has so far only been examined in a very fragmentary way. There is a variety of open questions that can have an impact on the success or costs of a takeover, as well as on the potential liability of the bidder. The study examines the most relevant legal questions and shows appropriate solutions. In addition, it identifies the necessity for changes to be made de lege ferenda with regard to the scope of the obligation to make a full offer and the additional acceptance period.
Rhetorik für Juristen
Authors: Tröger Thilo
Published: April 2021

Der sachgerechte Umgang mit Rechtsfragen, sei es im Studium oder in der Praxis, erfordert jenseits der notwendigen fachlichen Kompetenz soziale und kommunikative Fähigkeiten, die unter dem Begriff der Schlüsselqualifikation zusammengefasst werden. Das Buch macht es sich zur Aufgabe, die kommunikativen Schlüsselkompetenzen für juristische Arbeitsfelder erwerbbar zu vermitteln. Dabei wird auf den Unterschied zwischen der mündlichen und schriftlichen Sprachverwendung, auf die speziellen Anforderungen an mündliche Kommunikationssituationen sowie auf die Fähigkeit eingegangen, sich einerseits fachlich korrekt, andererseits adressatenbezogen und im Hinblick auf ein Wissensgefälle angemessen ausdrücken zu können. Zahlreiche Übungen im Buch helfen beim Kompetenzerwerb.
Capacitação de pais de crianças com TEA: revisão sistemática sob o referencial da Análise do Comportamento
Authors: Lopes Victória Druzian , Murari Silvia Cristiane , Kienen Nádia
Published: April 2021

Capacitar pais para mediar intervenções comportamentais com crianças com Transtorno do Espectro Autista (TEA) tem sido utilizado para favorecer o desenvolvimento dessas crianças. Esta revisão sistemática de literatura objetivou caracterizar as capacitações de pais ou cuidadores de crianças com TEA, sob referencial da Análise do Comportamento, analisando as suas características e resultados. A busca foi realizada sem restrição de tempo. Foram utilizados descritores em língua portuguesa e inglesa referentes a autismo, treinamento de pais e análise do comportamento, nas bases de dados e revistas: Pepsic, SciELO.ORG, PsycINFO (APA), Web of Science, Wiley Online Library, Catálogo de Teses e Dissertações (CAPES), Biblioteca Virtual em Saúde – BVS (BIREME), Revista Brasileira de Análise do Comportamento e Perspectivas em Análise do Comportamento. Foram selecionados 46 estudos e seus dados foram categorizados e analisados, por estatística descritiva, com foco em variáveis dependentes e independentes, comportamentos e conteúdos ensinados aos pais ou cuidadores, estratégias de ensino e resultados. A maioria dos estudos avalia os efeitos de pacotes de treinamento sobre o comportamento da criança e dos pais ou cuidadores e combina estratégias de natureza conceitual, instrucional e prática para ensiná-los a modelar o comportamento das crianças. As pesquisas, em sua maioria, descrevem de forma pouco precisa os comportamentos ensinados aos pais ou cuidadores, não indicando em quais contextos esses comportamentos devem ocorrer ou quais os efeitos esperados sobre o comportamento das crianças. Essa limitação no planejamento dos programas de capacitação pode estar relacionada com resultados inconsistentes e baixa manutenção dos resultados analisados nesta revisão.
Projeto Pedagógico do curso de Letras Libras: o bilinguismo em questão
Authors: Lima Ritha Cordeiro de Sousa e , Dorziat Ana
Published: April 2021

A formação bilíngue das pessoas surdas tem ocasionado tensões, uma vez que a prática do ensino de línguas de modalidades distintas demanda não apenas estratégias de técnicas formais para apropriação de códigos linguísticos, mas principalmente reflexões sobre um currículo culturalmente situado. A partir dessa premissa, desenvolvemos uma pesquisa em um curso (Letras Libras) que tem como alvo as pessoas surdas. Para tanto, usamos as lentes epistemológicas dos Estudos Culturais e dos Estudos Surdos, por considerarmos que as mesmas permitem maiores incursões no fenômeno educacional que envolve as pessoas surdas. A partir da questão de pesquisa “de que forma o curso de Letras Libras aborda os aspectos que envolvem os princípios bilíngues em seu PP (Projeto Pedagógico)?”, buscamos, por meio de uma pesquisa documental, com foco no PP do curso de Letras Libras, atingir o seguinte objetivo: identificar aspectos dissonantes com relação aos princípios bilíngues no PP do curso de licenciatura em Letras Libras. Os resultados mostraram que há fragilidade quanto a esses princípios no documento analisado (PP), sobretudo acerca de como se dariam alguns procedimentos metodológicos quando o processo ocorresse por meio do uso da Libras.
Educação Especial Inclusiva: uso de Recursos Educacionais Digitais nas Salas Multifuncionais
Authors: Faria Arlete Vilela de , Vieira Estela Aparecida Oliveira , Martins Ronei Ximenes
Published: April 2021

Este relato apresenta pesquisa que teve como objetivo investigar a aplicação de Recursos Educacionais Digitais por professores durante o atendimento educacional especializado realizado em Salas de Recursos Multifuncionais de escolas públicas do sul de Minas Gerais que contam com este recurso. A abordagem adotada foi quanti-qualitativa com coleta de dados por meio de questionário e entrevistas semiestruturadas com os professores participantes. Foram convidados 70 docentes das escolas estaduais de 29 cidades e 40 concordaram em participar. A partir da triangulação e análise dos dados, elementos essenciais que compõem a prática in loco da educação especial, foram identificados, dentre eles, a falta de diagnóstico de deficiência dos estudantes atendidos nas Salas de Recursos Multifuncionais. Outro ponto relevante identificado foi o déficit na formação inicial do profissional, que não aborda a temática em profundidade. Em consequência, a formação continuada se torna necessidade premente para a edificação do conhecimento tanto no campo da educação especial e inclusiva quanto das Tecnologias Digitais da Informação e Comunicação. Em relação à mediação e ao uso das tecnologias digitais, foram encontradas dissonâncias, pois, na maioria dos casos analisados, os recursos educacionais digitais não trouxeram alterações significativas na articulação entre ensino e conteúdo. Os resultados levaram à inferência de que existe necessidade de se estabelecer maior relação entre o currículo, os recursos tecnológicos disponíveis nas Salas de Recursos Multifuncionais, as demandas e peculiaridades dos estudantes e a mediação pedagógica do professor.
Impact of barriers on formation and development of urban transport network (case of South-West Moscow)
Authors:   Russian Academy of Sciences, Kamkin G.G.
Published: April 2021

The article is devoted to the analysis of urban “highways-barriers” (on the example of the South-West of Moscow) – the largest highways and railways, which are characterized by a combination of a high level of contact and barrier functions. Three of their key functions are identified: limiting, stabilizing, function of unevenness and no equilibrium growth. The main transport hubs have been identified on the basis of which highway barriers are divided according to the degree of contact (barrier) into three categories. It is shown that, as a rule, the larger the spatial size of the highway-barrier, the larger its volume of traffic flow, however, there are many exceptions. In the South-West of Moscow, with a relatively even settlement, the placement of metro stations plays a key role in overcoming the barrier. On less significant highways, the role of metro stations in overcoming the barrier is especially great. In some areas, highways-barriers form barrier topological tiers. A key feature of the South-West of Moscow is the presence of two barrier tiers. Inside the first barrier tier there are objects that mark it as a special urban area. A characteristic part of the first tier is the approach to the periphery in the area where Leninsky Prospekt and Vernadsky Prospekt meet. The second barrier tier is quite small and in- cludes the area between the Cheremushkinskiy market and Profsoyuznaya street. The existing system of highways-barriers was formed by the time of registration in 1968–1970. South-West of Moscow as a whole and manifests itself at the present time.
Possibilities for developing leadership competences through the system of military education: System openness
Authors: Milošević-Stolić Jasmina
Published: April 2021

The paper presents comparative research on the representation of subjects within the study programs of three higher military educational institutions (Military Academy, University of Defense in Belgrade, University of Defense in Brno, Czech Republic, Royal Military School in Belgium), in order to strengthen their leadership competencies. The conducted comparative research was intended to contribute to predicting the future development of education of professional members of the armed forces, as part of the defense system in the field of leadership, especially because the comparison includes educational systems of countries with different social, economic, historical and social milieu. The aim of the paper in a broader sense was to try and decipher the dimensions of leadership of professional members of the defense system; in a narrower sense the aim was to determine the possibilities of developing leadership competencies through the system of military education provided through the study programs of the Military Universities in Serbia, Belgium and the Czech Republic. The main subject of this research is the leadership competencies of professional military personnel. We have defined the concept of leadership as one of the functions of management, which primarily refers to the influence of leaders on other employees, in order to achieve organizational and group goals. The notion of the necessary leadership competencies is defined as a function of knowledge, skills and attitudes necessary to perform complex functions and roles of officers, which can be classified as systemic and interpersonal competencies. The problem of leadership in the defense system is complex due to the very nature and characteristics of the system itself. Precisely because of the significance of the topic, as well as the fact that this issue remains current and new, it is scientifically and professionally justified to dedicate attention to researching the problem of developing leadership competencies in the military educational system. Furthermore, given the fact that change has become a way of life inherent to every modern organization, the military ones included, new leadership competencies, necessary to perform complex functions and roles of defense system officers are required of the employees and therefore it is necessary to implement the concept of lifelong, permanent and continued education in order to meet the demands of the job set before professional military personnel.
Early warning system prototype on torrential floods in mountainous areas based on the IoT
Authors: Šakrak Enes , Dobrojević Miloš
Published: April 2021

Bosnia and Herzegovina is predominantly mountainous country with many settlements located near rivers. The characteristic terrain and seasonal occurrences of large amounts of water, due to rainfalls or snowmelt, make Bosnia and Herzegovina a country at a constant risk of flooding. Although the weather and hydrological situation in the territory of BiH is monitored by two hydrometeorological services, one from the Republika Srpska and the other from the Federation of BiH, automatic measuring stations have been set on the main watercourses, while remote monitoring of distant mountain areas subject to sudden emergence of torrential waters has not been established. A prototype of an IoT based torrential floods early warning system presented in this paper could solve this problem, being capable of monitoring watercourses in remote and inaccessible terrain. This system may be set to function autonomously, or as an integral part of an existing flood defense system. The basic unit of the system is an automatic measuring station (AMS) based on an Arduino controller with appropriate sensors, modules and power supply. Being small in size and affordable, easy to manufacture and setup, autonomous in operation and capable of wireless data transmission, makes AMS suitable for applications where use of standard metering stations is not possible. Number of AMSs in the system may vary and depend on the size of territory and water basin being monitored. Web server with custom developed Web application collects, processes, analyses and distributes data, while access level is set in correspondence with real-life authorization levels within the organizational structure of the flood defense system. Implementation of such system may provide monitoring of the situation in inaccessible areas in the basin, and assessment of time remaining until the flood wave reaches populated places. This will provide enhanced situation awareness and an additional window of opportunity for timely notification, reaction and protection of the local population and material goods.
Attitudes of police officers of the Police Department in Sremska Mitrovica regarding family violence and application of Law on the Prevention of Domestic Violence
Authors: Vranešević Milena
Published: April 2021

The aim of this research was to examine the attitudes of police officers about some characteristics of domestic violence, with special emphasis on the implementation of the Law on the Prevention of Domestic Violence. Empirical findings were gathered by the survey encompassing 31 police officers from the Police Department in Sremska Mitrovica who have obtained certificates in accordance with the mentioned law. Following data collection, a statistic method was applied to sort, classify and process them at the level of descriptive statistics and the computer program IBM SPSS Statistics 20 was used for this purpose. This research has determined the frequency of various forms of domestic violence, structure of victims and perpetrators, as well as their mutual relations. It has pointed out the scope and some of the reasons for the existence of a dark number of domestic violence, especially in cases in which children exerted violence against parents and in which policemen were in the role of a victim or a perpetrator. The most frequent reasons have been determined for not abandoning a violent partner, recalling criminal charges or misuse of the right to report domestic violence. Given that one of the innovations in the Law on the Prevention of Domestic Violence is the implementation of urgent measures within the national legal system, frequency of their implementation is also subject matter under research. A particular part of the research is dedicated to examining the current state in terms of cooperation among the police and other competent state organs and institutions in cases of domestic violence, which could be the basis of consideration for direction and extent of its improvement.
Spatial variability of soil temperature in an urban area: A case study for a medium-sized European city
Authors: Lehnert Michal , Šimáček Petr , Fiedor David , Jurek Martin
Published: April 2021

Even though soil temperature in urban environment influences a range of processes, it has been studied rather sparsely in comparison with surface temperature or air temperature. Our research extends the soil temperature observation in Olomouc (Czechia) and uses semi-stationary measurement to describe detailed spatial variability of soil temperature in the area of a medium-sized Central European city. Differences in soil temperature 20 cm below grass-covered surface may exceed 3°C due to soil type, shadow cast by buildings and grass characteristics, which means that the representativeness of the data on soil temperature from a meteorological station within a city may be limited. Further research and a conceptual approach towards the study of soil temperature in urban landscape is needed.
Erratum: Prototype of Web-based daily work report management system using smart pens (2019, vol. 17, No. 3, p. 280-283)
Authors: Editorial Board
Published: April 2021

Upon written remarks of Dr. Alexander Babanin from University of Melbourne, Melbourne, Australia and Dr. Bertrand Chapron from Laboratoire d'Océanographie Physique et Spatiale, Centre de Brest, IFREMER, Plouzané, France that each of them was included in the list of co-authors without their acceptance and knowledge, and written apology of the corresponding author Dr. John Chen explaining it was his omission, the Editorial Board decided to correct the list of initially listed authors. Therefore, initial authors list from the above stated paper published under the paper number 17(2019)3, 607, 280-283 with DOI:10.5937/jeas10-18602: Tim Chen1 , Alexander Babanin2 , Abū al-Qāsim Muḥammad3, Bertrand Chapron4 , John Chen5,6*, Himel Md Sakibul Hassan Sajib6,7 1 Al LAB, Faculty of Information Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam 2 University of Melbourne, Melbourne, Australia 3 King Abdulaziz University, Jeddah, Saudi Arabia 4 Laboratoire d'Océanographie Physique et Spatiale, Centre de Brest, IFREMER, Plouzané, France 5 Staffordshire University, Staffordshire, United Kingdom 6 BRAC University, Dhaka, Bangladesh 7 Asia Pacific University, Kuala Lumpur, Malaysia has to be written as follows: Tim Chen1, Abū al-Qāsim Muḥammad2, John Chen3,4*, Himel Md Sakibul Hassan Sajib4,5 1 Al LAB, Faculty of Information Technology, Ton Duc Thang University, Ho Chi Minh City, Vietnam 2 King Abdulaziz University, Jeddah, Saudi Arabia 3 Staffordshire University, Staffordshire, United Kingdom 4 BRAC University, Dhaka, Bangladesh 5 Asia Pacific University Kuala Lumpur, Malaysia. Exclusion of Dr. Alexander Babanin and Dr. Bertrand Chapron does not affect original paper.
Command responsibility
Authors: Dinić Slavica , Turković Emil
Published: April 2021

As a part of the presentation in this paper, we will deal with one of a number of specific characteristics arisen while determining the criminal responsibility of perpetrators of international crimes, the one related to the institute of command responsibility, which are familiar with the statutes of both ad hoc tribunals (the Statute of the Tribunal in the Hague of 1993 and the International Criminal Tribunal for Rwanda of 1994), as well as the so - called the Rome Statute from 1998. In these statutes, it is set in such a way that, in one of its parts, it contradicts the basic criminal law institutes (the principle of individual subjective responsibility, the principle of justice). However, in accordance with the assumed international obligations, this institute was introduced to the criminal law system of Republic of Serbia on January 1st 2006, by prescribing, within Article 384 of the Criminal Code of Republic of Serbia, a real criminal offense of omission, which is also the subject of this paper.
Design of the UAV aerodynamics in multiple stages
Authors: Popović Lazar , Paunović Lazar , Đilas Veljko , Milutinović Aleksandar , Ivanov Toni , Kostić Ivan
Published: April 2021

This paper presents a methodology for aerodynamic optimization of UAV with VTOL capabilities. Aircrafts such as these usually fly at low speeds and due to that low Reynolds numbers are to be expected. The friction drag is highly dependent on the quality of the production process so unless special measures are undertaken, high friction drag coefficients could drastically influence overall performance of the aircraft. Changes of the geometrical parameters influence not only the induced drag of the wing, but also the distribution of the base drag due to sensitivity to changes of the Reynolds numbers. In order to determine the optimal geometrical parameters of the wing, a code for wing performance analysis was written. All necessary factors were calculated by utilizing the Glauert's solution of the Prandtl's equation for multi-segmented wings. By including experimental data of numerous airfoils optimized for low Reynolds numbers, the base drag distribution, along with the induced drag of the wings were calculated for a wide range of angles-of-attack. The obtained results are presented through diagrams and the methodology for the selection of the highest efficiency wing is described. The design of the T - shaped stabilizer was achieved by utilizing analytical methods while the Vortex Lattice Method, DATCOM and CFD were used for verification purposes.
The influence of the internal ballistic pressure on the rifled barrel stress response
Authors: Boukera Abaci , Kari Aleksandar , Jerković Damir , Hristov Nebojša
Published: April 2021

This paper focused on the 12.7 mm gun barrel stress response caused by the pressure of the gunpowder gases. During the firing process, the barrel is loaded by different mechanical, chemical and thermal loads. In this paper except the pressure of the propellant combustion, all the other loads were ignored. The pressure loads are obtained with a mathematical model of the interior ballistic. The Lame equations for the thick-walled cylinder were used to calculate the barrel stress response. The loads are applied on a certain barrel cross-section for a defined time. Two 3D models of the barrel with and without grooves were used to perform a numerical simulation. A comparison between results for the two types of barrels shows a good agreement between the stresses obtained by the analytical and numerical methods.
Behavior tests of a new form of propulsion after ship reconstruction
Authors: Dauti Enis , Trifković Dragan
Published: April 2021

The subject of this paper is a detailed qualitative analysis maneuvering and propulsion characteristics of a special purpose river vessel "KOZARA" River war flotillas of the Serbian Army, after reconstruction and modernization. With the modernization of the ship, among other things, the old propulsion group with a classic diesel engine propulsion was replaced by a new diesel electric propulsion. In order to assess the justification of this replacement from the aspect of expected improvements of shunting and propulsion characteristics of the ship, it was necessary to develop and implement a test program and compare the results with available test results of the ship with the old propulsion group in earlier periods of ship operation. The results of measuring the basic maneuvering characteristics: ship speed, stopping distance and turning circle diameter, as well as propulsion characteristics: propeller shaft power, axial and torsional vibrations after six years of operation of the new propulsion confirmed all the advantages of diesel electric propulsion over classic diesel engine propulsion. However, certain problems have been noticed in terms of maintaining this complex plant, and proposed measures to overcome them.
Radiated Sound Power from Near-Surface Acoustic Sources
Authors: Karimi Mahmoud , Kinns Roger , Kessissoglou Nicole
Published: April 2021

This article investigates the radiated sound power from idealized propeller noise sources, characterized by elemental monopole and dipole acoustic sources near the sea surface. The free surface of the sea is modeled as a pressure-release surface. The ratio of sound power of the near surface sources to the sound power from the same sources in an unbounded fluid is presented as a function of source immersion relative to sound wavelength. We herein show that the sound power radiated by submerged monopole and horizontal dipole sources is greatly reduced by the effect of the free surface at typical blade passing frequencies. By contrast, the sound power from a submerged vertical dipole is doubled. A transition frequency for the submerged monopole and horizontal dipole is identified. Above this transition frequency, the radiated power is not significantly influenced by the sea surface. Directivity patterns for the acoustic sources are also presented.

Introduction

The principal sources contributing to underwater radiated noise (URN) over a wide frequency range are propellers and onboard machinery (Urick 1983; Ross 1987; Collier 1997; Carlton 2007). Propeller sources are highly complex, but simplification is possible at low frequencies where the wavelength of underwater sound is much larger than propeller dimensions. The propeller may then be regarded as a set of fluctuating forces at the propeller hub and a stationary monopole source that represents the growth and collapse of a cavitation region as each blade passes through the region of wake deficit. This type of model was used by Kinns and Bloor (2004) to examine the net fluctuating forces on a cruise ship hull due to defined propeller sources. The nature of the monopole source was considered by Gray and Greeley (1980), who focused on singlescrew merchant ships where cavitation is dominant at operational speeds. Nonuniformity in the wake, as well as static pressure that falls toward the sea surface, causes this monopole source to be located near top dead center, closer to the surface than the propeller hub. It introduces cyclic components at multiples of propeller blade passing frequency (bpf) as well as broadband noise over a wide frequency range. These components create a pressure field that acts on nearby hull surfaces, but the URN is controlled by the presence of the pressure release surface that corresponds to the free surface of the sea. The aim of this article was to investigate how idealized propeller noise sources are influenced by the surface of the sea.
Heading in the right direction? Using head moves to traverse phylogenetic network space
Authors: Janssen Remie
Published: April 2021

Head moves are a type of rearrangement moves for phylogenetic networks. They have primarily been studied as part of other types of moves, such as rSPR moves. Here, we study head moves as a type of moves on themselves. We show that the tiers ($k>0$) of phylogenetic network space are connected by local head moves. Then, we show tail moves and head moves are closely related: sequences of tail moves can be converted into sequences of head moves and vice versa, changing the length by at most a constant factor. Because the tiers of network space are connected by rSPR moves, this gives a second proof of the connectivity of these tiers. Furthermore, we show that these tiers have small diameter by reproving the connectivity a third time. As the head move neighbourhood is small in general, this makes head moves a good candidate for local search heuristics. Finally, we prove that finding the shortest sequence of head moves between two networks is NP-hard.
Diseño y maquetación de ’newsletter’ y ’landing page’
Authors:   Universitat Oberta de Catalunya, Gama Vilallonga Martín
Published: April 2021

Análisis del proceso de diseño de maquetación de un ’newsletter’ (boletín informativo) y una ’landing page’ (página web de aterrizaje o presentación) que serán publicadas por el festival FESTDESIGN_BCN de diseño gráfico, ilustración y ’motion graphic’s, que celebra en febrero de 2021 su nueva edición de manera totalmente online debido a las restricciones de carácter sanitario por la pandemia del COVID-19.
Enhanced photovoltaic effect in LaAlO3/SrTiO3 interface
Authors: Xi Jian-Feng , Li Bao-He , Liu Dan , Li Xiong , Geng Ai-Cong , Li Xiao ,   Department of Physics, Beijing Technology and Business University, Beijing 102488, China
Published: April 2021

Since high-mobility electron gas, which is also called two-dimensional electron gas, was discovered at the LaAlO3/SrTiO3 (LAO/STO) interface, SrTiO3-based heterostructures and nanostructures have become an attractive platform for novel nanoelectronic devices. Exploring the novel physical properties of LAO/STO interface and the mechanisms of interface effect is the key to designing and fabricating the new photoelectric devices. The LAO/STO sample is prepared on an STO (001) substrate by pulsed laser deposition. In order to study the influence of interface effect on photovoltaic effect in the LAO/STO sample, a KrF pulse laser with a wavelength of 248 nm and an energy density of 50 mJ/cm2 is chosen as an ultraviolet light source, a sampling oscilloscope of 350 MHz is used to measure the photovoltages, and a precision adjustable slit is adopted to control the size of irradiation area. The photovoltaic effect is studied under the condition of applied electric field at ambient temperature. The experimental results prove that the photovolatge of irradiating on the side of sample (LAO/STO interface) is higher than on the front of sample (film surface) under the same area of irradiation. Lateral photovoltaic effect is discovered in the LAO/STO sample. Irradiating on the side of sample (LAO/STO interface) can further improve the lateral photovoltaic effect in the LAO/STO sample. The open-circuit photovoltage depends linearly on the illuminated position, and the sensitivity reaches 36.8 mV/mm. The sensitivity of the lateral photovoltaic effect can be modified by the bias voltage. The experimental results not only contributes to better understanding the interface effect in LAO/STO interface, but also provides a basis for designing and using photoelectric devices for position-sensitive detection.
Bioinformatics analysis of laryngeal squamous cell carcinoma: seeking key candidate genes and pathways
Authors: Ma Jinhua , Hu Xiaodong , Dai Baoqiang , Wang Qiang , Wang Hongqin
Published: April 2021

Background

Laryngeal squamous cell carcinoma (LSCC) is the second most aggressive head and neck squamous cell carcinoma. Although much work has been done to optimize its treatment, patients with LSCC still have poor prognosis. Therefore, figuring out differentially expressed genes (DEGs) contained in the progression of LSCC and employing them as potential therapeutic targets or biomarkers for LSCC is extremely meaningful.

Methods

Overlapping DEGs were screened from two standalone Gene Expression Omnibus datasets, and Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses were performed. By applying STRING and Cytoscape, a protein–protein network was built, and module analysis was carried out. The hub genes were selected by maximal clique centrality with the CytoHubba plugin of Cytoscape. UALCAN and GEPIA data were examined to validate the gene expression findings. Moreover, the connection of the hub genes with LSCC patient overall survival was studied employing The Cancer Genome Atlas. Then, western blot, qRT-PCR, CCK-8, wound healing and transwell assays were bring to use for further verify the key genes.

Results

A total of 235 DEGs were recorded, including 83 upregulated and 152 downregulated genes. A total of nine hub genes that displayed a high degree of connectivity were selected. UALCAN and GEPIA databases verified that these genes were highly expressed in LSCC tissues. High expression of the SPP1, SERPINE1 and Matrix metalloproteinases 1 (MMP1) genes was connected to worse prognosis in patients with LSCC, according to the GEPIA online tool. Western blot and qRT-PCR testify SPP1, SERPINE1 and MMP1 were upregulated in LSCC cells. Inhibition of SPP1, SERPINE1 and MMP1 suppressed cell proliferation, invasion and migration.

Conclusion

The work here identified effective and reliable diagnostic and prognostic molecular biomarkers by unified bioinformatics analysis and experimental verification, indicating novel and necessary therapeutic targets for LSCC.
Assessment of walking disorder in community-dwelling Japanese middle-aged and elderly women using an inertial sensor
Authors: Miyashita Toshinori , Kudo Shintarou , Maekawa Yoshihiro
Published: April 2021

Background

Decreased walking speed has been revealed to be related to many negative events. Several researchers support the importance of triceps surae function as a cause of decreased walking speed. The purpose of this study was to investigate the relationship between walking speed and plantar flexor power during the terminal stance of gait in community-dwelling middle-aged and elderly women using an inertial sensor.

Methods

One hundred thirty-six healthy female middle-aged to elderly community-dwelling women were included in this study. We measured two-step score, grip strength, walking speed and accelerometer data from which we estimated ankle power (estimated ankle power) during walking using an inertial sensor. All participants were classified into the four different age strata, fifties (50–59), sixties (60–69), seventies (70–79) and eighties (80–89). The differences in each parameter between the four age groups were compared using repeated analysis of variance and post-hoc Bonferroni corrections for multiple comparisons to establish significance. Multiple regression analysis was carried out using a stepwise method to determine the correlations with comfortable walking speed. Comfortable walking speed was considered a dependent variable.

Results

The normalized estimated ankle power of the eighties group was significantly decreased in comparison with seventies age groups and fifties age groups (P < 0.05), but there were no significant differences in normalized estimated ankle power between the sixties and eighties age-groups. The results of stepwise multiple regression analysis revealed that the normalized estimated ankle power, two-step value and body weight were highly-significant partial regression coefficients (adjusted R2 = 0.57).
Prediction of the One Repetition Maximum to Design Strength Training Protocol
Authors: Jawade Swapna Sugat
Published: April 2021

Accurate measurement of muscle strength is essential to design proper strength training protocol and to find out the efficacy of prescribed strength training protocol on muscle performance. One Repetition Maximum (1RM) is a reliable mean for the measurement of muscle strength. Primary goal of this review article was to explore the methods used in various articles of research databases that investigate the accurate way of estimation of 1RM before the design of strength training protocol. Wide range databases were searched to address articles on prediction of 1RM mentioned in Scopus, Pubmed, MEDLINE, Web of science, Google scholar databases, Wiley online library. Accurate determination of 1RM is based on various variables like gender, age, familiarisation of exercises, selection of predicted load, parts of body assessed (upper or lower limbs), rest interval given between exercise attempt and number of repetitions with percentage of predicted load. Prediction of 1RM varies significantly across different research studies. Based on the articles reviewed, it can be concluded that accurate prediction of 1RM is important to quantify current muscle strength level before one begins with strength training protocol. Many research articles mentioned that calculation of 1RM consists of trial and error, and it can also result into delayed onset of muscle soreness of particular tested muscles. Accurate Prediction of 1RM is important to design strength training protocol and it is also used to find out the efficacy of strength training protocol on muscle performance.
Development of Quality of Life Tool for Children Diagnosed with Epilepsy-A Pilot Trial
Authors: Vageriya Vipin , Sharma Anil
Published: April 2021

Introduction: Epilepsy is a neurological condition in which child has a recurrent seizure. It results in imbalance of neurotransmitter. It has an impact on various aspects of a child like physical, social, behaviour, psychological and intellectual. Epilepsy is one of the common disease which present among children. Existing Quality of Life (QOL) tool do not cover the issues significant to Indian children. Aim: To develop a QOL tool for children diagnosed with epilepsy. Materials and Methods: This study was a sequential exploratory mixed method study. It included qualitative and quantitative study. In qualitative phase, the information was collected by using in-depth interview of participants. Interview data were analysed by using conventional content analysis method and themes, subthemes were created. On the basis of it, a pool of items for the questionnaire was developed. In quantitative phase, psychometric property of the questionnaire was evaluated by using face, content and constructs validity. The reliability of tool assessed by internal consistency and Cronbach’s alpha. Total 15 and 20 subjects were involved in qualitative and quantitative phase respectively. Results: Qualitative method consist of 3 steps- in-depth review of literature, participant’s interview and expert opinion. At the end of phase I, a draft of 84 questionnaires as item pool generation developed. In phase 2, an expert panel reviewed 84 items for relevance, language, wording and duplication. 30 items were deleted on the basis of expert opinion, Item Content Validity Index (I-CVI) and Scale Content Validity Index (S-CVI). Now, 54 items were administered to 20 participants. Based on the participants responses investigator draw a scree plot based on eigen value of above 1. These 5 domains explained 76.42 % of the total variance. Total 9 items were deleted from pool of 54 items on the basis of item total correlation coefficient and inter-item correlation. Final 45 items were classified as per specific domain. The final draft had a Cronbach’s alpha value of 0.876. Conclusion: Majority of QOL tool are not applicable to Indian population due to geographical and cultural differences. So the aim of this study was to develop a tool which benefited to Indian population. In this study, the final draft consists of 5 components with 45 items as per analysis. This newly developed tool will help the health care provider to assess the QOL of epileptic children.