bluuebunny/crossref_metadata_2025 huggingface dataset:
The Poetics of Life
Authors: Rubio Carrillo Víctor Manuel
Published: March 2021

The conditions generated by the COVID-19 global pandemic led our Musical Learning Community to improvise and face challenging social circumstances. We aimed at maintaining intact our long-term vision to create alternative cultural practices away from neoliberal subjugation. By exploring the lived experiences of musicians, dancers, artists, educators, and community members in North America, South America, and Asia, we learned how imagination became an imperative in the quest to create alternatives. Liberation, while confined, was carried out through artistic practices. However, neoliberal economic policies maintain a stronghold at the social level. Despite that, rural experiences showed different responses to the pandemic. While in urban centers, confinement and curfews were normative; in rural communities, artistic performances and togetherness were common. While in cities distancing was advised, in rural communities, proximity was embraced. We further reflect on how the current circumstances allowed us to improvise the birth of our action research community, which we propose as a humble grassroots alternative to neoliberal knowledge construction.
A Musician's Notes
Authors: Knowles Liz
Published: March 2021

Liz Knowles' contribution for the COVID-19 Special Edition.
At the Intersection of the Artistic and the Practical
Authors: Pearse Lukas
Published: March 2021

Mark Marczyk's (Artistic Director, Upstream Music) contribution to the special issue, "Improvisation, Musical Communities, and the COVID-19 Pandemic."
Imagining Outside of a Pandemic
Authors: Gareiss Nic
Published: March 2021

I'm a dancer who engages improvisation every time I put on my shoes to brush, step, click, and knock the floor. Not surprisingly, my work until March 2020 was primarily with fellow sound-makers, usually folk musicians from Ireland, Scotland, what's now called Canada, and what's now called Appalachia. COVID-19 has forced me to listen to the extemporaneous music I make anew, in the absence of collaborators, within a soundscape of profound uncertainty. In this contribution, I offer a voice from the floor, enunciated by my lowest limbs contacting the surface upon which I stand. This is where my work as an LGBTQ2IA+ improvising step dancer finds its meaning. In this essay, I respond to the incisive queer horizon Thomas F. DeFrantz casts, as "imagining outside of what came before." I share ways I have been thinking about improvisation and offer thoughts on how we might learn from DeFrantz to imagine and improvise “outside of” critically, queerly, and generatively.
Notes From The Couch
Authors: Menard Laura
Published: March 2021

As Michel Serres states, “The one who has power is the one who has the source and emission of sound” (1982). The sudden soundlessness of our COVID-19 existence is one of the largest pandemic challenges facing musicians. While some argue that there should be a hiatus on creation, others are embracing music’s adaptations to less traditional forums and formats. As a public high school teacher and conductor-educator with a youth-focused private organization, I am experiencing first-hand the improvisations, challenges, triumphs—and attendant burn-out—of rapidly adapting new spaces in which to keep my musical communities intact. Fellow conductor-educators near and far, working with populations at all ages and stages, are also bravely forging onward, rejecting sound-less and ensemble-less realities by adapting online. This all begs the questions: What does the near future hold for choral singing? And what will singing ensembles look like on the other side of current restrictions? Drawing together personal experience, informal interviews, explorations of the transformations of public and private space, sound and media studies, drift methodology, and the proliferation of recent articles in news and arts media, this essay investigates the novel spaces being created by and for choral arts educators amidst the uncertainties of what new reality awaits us on the other side of the screen-scape.
SILENCE
Authors: Raczycki Scarlett
Published: March 2021

This piece identifies some of the unique challenges of the COVID-19 pandemic for non-profit arts administration. It profiles Silence, Guelph a small music venue, art gallery and community space and how we have experienced the pandemic and continue to learn from and grow through the challenges it presents.
Online Clubbing and Digital Drag
Authors: Brown Hannah
Published: March 2021

Hannah Brown's contribution for the COVID-19 Special Issue.
URGNT AND ESSENTIAL
Authors: Marczyk Mark
Published: March 2021

Mark Marczyk's (Executive Producer, URGNT) contribution to the special issue, "Improvisation, Musical Communities, and the COVID-19 Pandemic."
Correlación entre número de cepillados por día y cpod en escolares de 12 años de la parroquia El Vecino (Cuenca, Ecuador) 2016
Authors: Fernández-Pesantez Hannia Estefanía , Romo-Cardoso Adriana Belén , Cabrera-Cabrera Gladys Eulalia
Published: March 2021

Objetivo: Correlacionar el número de cepillados por día y el índice CPOD en los escolares de 12 años de la parroquia El Vecino (Cuenca, Ecuador) en 2016. Materiales y métodos: El estudio fue de tipo comunicacional, cuantitativo, descriptivo y relacional. La población estuvo conformada por 279 fichas que pertenecen al estudio del mapa epidemiológico para los escolares de la parroquia El Vecino. La ficha de observación incluyo los siguientes datos: número de registro, edad, sexo, parroquia, índice de COPD. Resultados: En lo referente a la correlación entre el número de cepillado por día y el índice de CPOD, se demostró que existe una correlación inversa, la estadística significativa presento un valor de p = 0,029. Conclusión: El presente estudio demostró que existe una correlación entre el número de cepillados por día y el índice CPOD.
DÜNYADAKİ ÖRNEKLER IŞIĞINDA YATIRIM YOLUYLA VATANDAŞLIK UYGULAMASINA ELEŞTİREL BİR BAKIŞ
Authors: KAYA Talat
Published: March 2021

Yatırım yoluyla vatandaşlık kavramı yabancı kişinin ülkeye yaptığı doğrudan veya dolaylı yatırım veyahut bağış karşılığında, yatırım yapılan devlet tarafından verilen vatandaşlık olarak tanımlanabilir. Yatırım yoluyla vatandaşlık verilmesi konusunda geleneksel uygulama, ülkeye belli bir yatırım getirilmesine ilave olarak, yatırım yapan kişinin girişimcilik ve istihdam oluşturma gibi belli vasıflara haiz olmasını aramaktadır. Yatırım yoluyla vatandaşlık verilmesi uygulamaları son 30 yılda ise yatırımcının vasfını göz ardı eden, buna mukabil getirilen ekonomik katkıyı ön planda tutan yatırımcı programları çerçevesinde gelişmiştir. Başlangıçta Karayip bölgesinde yer alan küçük ada devletlerince yürütülen yatırımcı programları zamanla ABD, bazı AB ülkeleri ve Türkiye de dahil olmak üzere geniş bir coğrafyada uygulanır hale gelmiştir. Bununla birlikte, getirilen ekonomik katkının tek kriter olarak arandığı programlar, güvenlik, vergi, seçme ve seçilme hakkı, askerlik yükümlülüğü ve ekonomik fayda başlıkları altında ulusal ve uluslararası düzeyde ciddi eleştirilerin gündeme gelmesine neden olmuştur. Söz konusu eleştirilerin temelinde ise vatandaşlığın metalaştırılması ve aidiyet bağı tesis edilmeden vatandaşlığın verilmesi yatmaktadır.
Comparison of the seismic and wind analyses of two tower cranes
Authors: Oliveira Carlos S. , Correia Pedro M. B.
Published: March 2021

Tower cranes act as essential support equipment for the development of the city’s construction projects, not only for new projects but also in the rehabilitation of old structures. In the present study, we analyze and compare two different tower cranes, where the differences are essentially based on the geometry, weight, and consequently the reach and load capacity of each structure. In general, these types of structures correspond to slender steel structures designed to carry high loads. Despite the great importance given to these structures, many disasters have occurred causing damage to people or to urban equipment in the vicinity due to total or partial collapse. We developed a 3-D mathematical linear model of the structures in SAP2000 and compared the analytical frequencies with in situ measurements. The maximum error for the first two translationally identified modes in the x and y directions was 4.9 %. These structures are very flexible, with frequencies below 0.5 Hz. We then applied and evaluated the impact of two types of exceptional action, seismic (maximum reference acceleration of 1.5 m/s2 and 1.7 m/s2) and wind load characteristics of an urban area (surrounded by buildings), for the two structures not carrying any load. The effects resulted in no serious consequences, with wind being the most severe action in certain cross-sections and seismic action in others. One very important and innovative aspect of this study was the in situ characterization of the frequencies and the verification that the mathematical model reproduced the behavior of the real structure very well. We complemented this study by measuring four more structures and proposing a law to estimate the frequency as a function of the length of the tower plus jib. However, we also found from a literature review of recently published work that, contrary to the six structures that we analyzed, it is difficult to extrapolate this law for other types of tower cranes.
Active damping for vibration control based on the switched stiffness technique
Authors: Ayala Rafael , Moreno-Ahedo Luis
Published: March 2021

An active damping controller based on the switched stiffness technique is developed and applied to vibration mitigation in a lightly damped structure. The controller either increases or decreases the system stiffness according to a state-dependent rule. A novel stability analysis based on the Floquet theory is proposed and employed to analyze the mathematical model of a one-degree-of-freedom system where the friction forces are taken into account. This novel analysis allows us to prove the exponential stability of the system origin, to establish a tuning procedure for the controller gain, to solve an optimization problem and to show the controller robustness against parameter uncertainties. Experimental verification is conducted to validate the effectiveness of the controller, and it is shown that the controller is feasible for vibration control problems.
Factors affecting the performance of the head of the liang state government of salahutu district central maluku district
Authors: Fretes Judy de , Latuconsina Nurainy , Khairunissa Atikah
Published: March 2021

The problem that occurs in the implementation of the state government is that the implementation of development policies has not been able to run optimally because of the state's change. Conflict in the head of the king's election, which has resulted in no country government heads being elected directly and becoming the definitive leader. Qualitative research methods are used to make direct observations in the field. The research results show that there is a lack of evaluation from the local government so that the problem of the emptiness of the king is not only in Liang Country but also in other customary countries in Central Maluku district. The implementation runs optimally because the head of state officials carrying out their duties properly and planning the country's development involves the community to participate actively.
The Effect of Sand Blasting on Shear Stress of Fiberglass – Shorea spp. Composite
Authors: Widodo Teguh Dwi , Raharjo Rudianto , Risonarta Victor Yuardi , Bintarto Redi , Kusumaningsih Haslinda , Saputra Muhamad Hendra
Published: March 2021

A coating is widely applied to protect base material during contact with surrounding. One important application in engineering is to protect a boat hull. The coating is applied to boat hull to prevent a decrease of mechanical properties of base materials particularly with corrosive seawater. Composite coating is applied since the composite coating provides better protection compared to paint coating. Additionally, sandblasting prior to composite coating is worked out to improve the mechanical properties of the coating. This work investigated the influence of the projection angle of the sandblasting process on the shear strength of the coated surface. The projection angle of sandblasting was varied from 30 to 90 °. The result shows that a higher projection angle decreases the strain strength of the coating surface. The experiment work showed that the shear strength of 30°, 45 °, 60 °, and 90°projection angle are 1.02, 0.66, 0.38, and 0.24 MPa, respectively.
Quality Analysis of 5.56 mm Ammunition Defect using Taguchi Method: A Review
Authors: Anggamawarti Merlina Fitri , Alviari Luana Putri , Sanjiwani Yudistira , Risonarta Victor Yuardi
Published: March 2021

In a manufacturing company, the quality loss is estimated by considering the number of defects. Taguchi is a method that finds strong conditions in uncontrollable environments of the field. Taguchi quantifies quality loss through a quality loss function. The Taguchi method particularly is focused on industrial processes. The method is actualizing quality philosophy for continuous quality improvement and cost reduction to improve manufacturing performance. The analysis is designed using Taguchi technique which is related to quality. A high-quality product has a minimal defect. The Taguchi method is used to analyze several defects of ammunition to reduce the number of ammunition defects. Ammunition consists of several parts are called projectile or bullet, cartridge case, propellant charge, and primer. Every part of its process possibly contributes to any defect. The defect type in every part of ammunition consists of critical, major, and minor defects. This paper is focused on cartridge case caliber 5.56 mm defect by using the Taguchi method. The quality characteristic of the experiment result used is smaller the better. Critical to Quality (CTQ) is determined to get a critical defect for cartridge cases such as split and perforated case. The influencing factors are brass cup thickness, hardness case after annealing, and annealing temperature. The Taguchi method is effective in reducing defects for the ammunition process to produce a good quality product.
Optimization of Cutting Speed and Feed Rate on Surface Roughness and Vibration using Taguchi Method: A Review
Authors: Ilham Mohammad , Suparjon Suparjon , Sanjiwani Yudistira
Published: March 2021

The result of a turning process is strongly influenced by the process parameters that could result in the product to be unacceptable. The cutting parameters may be determined according to the material hardness and roughness of the workpiece surface. The purpose of this paper is to investigate the effects of cutting speed and feed rate on surface roughness and vibration. In Taguchi method, the number of experiments is reduced by orthogonal arrays while  the effects of uncontrollable factors are also also reduced. The Taguchi method is used to reduce track, experimental time and production cost. Simple and precise are the most benefits of this method. Unstable vibrations in machining operations, known as chats, can cause damage to tools, workpieces, and machine tools. Cutting force is found to be the most dominant factor affecting surface roughness.
Synthesis of Hematite Pigment (Α-Fe2O3) from Iron Lathe Waste using Precipitation-Sonication Method as Anti-Swelling on Wood
Authors: Rahmawati Dewi Elok , Khoiroh Lilik Miftahul , Ningsih Rachmawati , Yusniyanti Febi , Solawati Wariatus , Sari Puspa
Published: March 2021

Iron lathe waste powder has the potential as a raw material in the synthesis of hematite pigments. Hematite pigments have many advantages, one of which is anti-swelling properties that can maintain the dimensions of wood. Hematite pigment synthesis was carried out using the precipitation-sonication method. The precipitation stage uses an ammonium hydroxide solution as a precipitating agent. Stages of sonication using the PEG-6000 template were performed at different times were 30, 45, and 90 minutes then calcined at 750 ° C for 3 hours. The samples were characterized by X-ray diffraction (XRD), color reader, and scanning electron microscope-energy dispersive
 X-Ray (SEM-EDX). The result confirmed that a ferrihydrite phase obtained after the precipitation process and transform into hematite after the calcination process with the highest degree of crystallinity for 90-minute sonication. From a color reader, the brightness and redness degrees decrease with increasing time. Scanning electron microscope results illustrated that the morphology was not uniform with the particle size getting smaller with increasing sonication time. The EDX results show that hematite pigments still contain impurities such as carbon. The swelling test indicated that the highest stability in hematite-pigmented wood increased as increasing in the weight of pigment.
Conceptual Framework Performance Contributor from Internal Organizations of Corporate Social Responsibility Activities
Authors: Handiwibowo Gogor Arif , Astuti Rini Puji , Ambarwati Rita
Published: March 2021

In this 20th century era, the business environment is more demanding that a business organization not only have a profit orientation. However, aspects of the impact on the environment and surrounding communities must also receive adequate attention in line with the increasing quantity and quality of business organizations. The concept of sustainable development is proposed to be a concept that tries to provide a balanced effect between financial performance factors, community welfare factors and environmental sustainability factors. In balancing the three factors above, CSR (Corporate Social Responsibility) activities of business organizations are expected to be the answer to the stigma that business organizations are only looking for profit. This paper will describe several hypotheses as well as a conceptual framework of factors originating from internal business organizations that have an impact on the performance of CSR activities. There are four factors that are proposed to be a hypothesis from the internal organization that must be fulfilled so that CSR activities show their performance. The four factors are fulfilment of human resources, fulfilment of the business organization's strategic vision, fulfilment of operating system implementation, and fulfilment of the business organization's financial capability.
Identification of Occupational Accident Risks in Nanomaterial Laboratories in Higher Education Based on Human Factors
Authors: Kustono Djoko , Puspitasari Poppy , Irsyad Muhammad Al , Nursabrina Aisya , Adesta Erry Yulian Triblas
Published: March 2021

The article describes a concept of health and safety to conduct research in Nanomaterial Laboratory in Two Public University in Malang, East Java, Indonesia. The utilization of nanomaterials in the world of education has been done in two universities in Malang, namely Malang State University and Brawijaya University. The nanomaterial laboratory as a means for research and development of nanomaterial science that often creates hazards and risks of work accidents for its users, but things that are often not realized. Dangers and risks of work accidents caused by the absence of standards. This research focuses on hazards and accidents in the nanomaterial laboratory using the HIRA (Hazard Identification and Risk Assessment) method, which is then followed by a variety of independent variables. The population in this study were nanomaterial researchers at two universities in Malang. Based on the results of trials between respondents 'competency expertise with the level of risk of workplace accidents in the nanomaterial laboratory obtained p- value 0.00 (<0.05), meaning that there is a significant relationship between the respondents' scientific conservation and the level of work accident risk in the nanomaterials laboratory. Furthermore, the results of the study were also obtained between the research respondents with the level of risk of work accidents in the nanomaterial laboratory with a p-value of 0.00 (<0.05), meaning that there was a significant correlation between the respondent's research experience and the level of work accident risk in the nanomaterial laboratory.
The Application of SWOT-AHP Combination in Small-Medium Enterprises (SMEs): A Literature Review 2010-2020
Authors: Dicinta Mutiara , Bawono Baju , Kristyanto Bernadus
Published: March 2021

This study discusses two cases of combined use of SWOT-AHP in SMEs from outside Indonesia. The journals studied were journals published in the last 10 years, namely from 2010-2020. This study explains the combined use of SWOT-AHP abroad and domestically (Indonesia) and further discusses the benefits and challenges in the combined implementation of the SWOT-AHP method in SMEs. This research can be a reference in subsequent studies that apply the combined SWOT-AHP based on the potential and challenges of using the combined SWOT-AHP.
Participatory Ergonomics in Industrially Developing Countries: A Literature Review
Authors: Prayitnoadi R Priyoko , Lawson Glyn , Hermawati Setia , Ryan Brendan
Published: March 2021

Participatory ergonomics (PE), the origins of which can be traced back to the western ergonomics approach, is an approach that focuses on involving workers to improve safety and health at their workplace. This paper has presented a literature review of studies concerning PE, the methodological approaches used to study PE and PE in industrial developing countries (IDCs). The paper has also explained factors which would seem to pose an extra challenge in applying PE in IDCs and Indonesia. The purpose of this was to provide the reader with a view of how the development of participatory ergonomics today possibly can help solve the problem of occupational safety in small-medium size enterprises (SMEs) in Indonesia.
TEACHER WORK ENGAGEMENT IN INCLUSIVE SCHOOL
Authors:   Master of Management, Faculty of Economics and Business, Universitas Brawijaya, Marthina Rosyanti Daisy , Armanu Armanu ,   Faculty of Economics and Business, Universitas Brawijaya, Ratnawati Kusuma ,   Faculty of Economics and Business, Universitas Brawijaya
Published: March 2021

This research aimed to identify and state the significance of teacher work engagement to improve inclusive school performance, where the inclusive school was a form of education equity and realization without any discriminations which currently have been organized by the government of Indonesia. Further, this research was based on the phenomenon which happened that not all teachers in inclusive school were involved maximally on the inclusive concept. This research was categorized into qualitative research which exerted case study approaches to explore the teacher experience during teaching activity in the inclusive school. It aims to identify teacher engagement at work. This research finding showed that the teacher work engagement was affected by self-efficacy and organizational climate. The teacher who had high self-efficacy referred that the teacher believes their selves were able to fulfill daily challenges in the school and therefore, the teacher tended to be more engaged on work. Besides, this research finding, indicated that the fun organizational climate became attendant which could influence the teacher work engagement.
THE EFFECT OF TAXATION UNDERSTANDING, TAX PERCEPTION ON APPLICATION OF AMENDMENT TO GOVERNMENT REGULATION NO. 46 OF 2013 BECOME NO. 23 OF 2018 ON SANCTIONS OF TAXATION AND PERSONAL MSME TAXPAYER COMPLIANCE IN PEKANBARU
Authors:   Sekolah Tinggi Ilmu Ekonomi Pelita Indonesia, Sudarno Sudarno , Suyono Suyono ,   Sekolah Tinggi Ilmu Ekonomi Pelita Indonesia, Yusrizal Yusrizal ,   Sekolah Tinggi Ilmu Ekonomi Pelita Indonesia, Regita Vivian ,   Sekolah Tinggi Ilmu Ekonomi Pelita Indonesia
Published: March 2021

This study aims to determine the effect of (1) Taxation Understanding on the Compliance of Personal MSME Taxpayers, (2) Taxpayers Perception Regarding Application of Amendment to PP No.46 of 2013 become PP No.23 of 2018 on the Compliance of Personal MSME Taxpayers, (3) Taxation Understanding on Tax Sanctions, (4) Taxpayers Perception about the Implementation of Amendment to PP No.46 of 2013 become PP No.23 of 2018 on Tax Sanctions, and (5) Tax Sanctions on Compliance of Personal MSME Taxpayers in Pekanbaru. The data was analyzed using Structural Equation Model (SEM). The results of this study indicate taxation understanding and taxpayer perceptions about the application of the amendment to PP No. 46 of 2013 become PP No. 23 of 2018 does not significantly affect Personal MSME Taxpayers. Taxation understanding and taxpayer perceptions about the application of the amendment to PP No. 46 of 2013 become PP No. 23 of 2018 has a significant effect on tax sanctions. Taxation sanctions significantly influence individual Personal MSME Taxpayers.
LEAN AND GREEN SUPPLY CHAIN MANAGEMENT IN IMPROVING OPERATIONAL PERFORMANCE IN SUGAR INDUSTRY
Authors:   Strategic Management Department, Universitas Brawijaya, Nursyam Suhardini Prasis , Sudjatno Sudjatno ,   Faculty of Economics and Business, Universitas Brawijaya, Hadiwidjojo Djumilah ,   Faculty of Economics and Business, Universitas Brawijaya
Published: March 2021

The purpose of this study is to understand supply chain management practices, Lean & Green management, and the integration of Lean & Green Supply Chain Management in PG. Krebet Baru - PG. Rajawali I in improving operational performance in supplier and manufacturing chains. The method used is case study qualitative research through interviews, observation, documentation, document review & corporate websites that produce data analysis. The results of this research data analysis produced the first proposition related to supply chain management practices, namely coordination in the flow of material, information, and finance that is being increased by PG Krebet efforts in maintaining better cooperative relations with farmer groups as suppliers. The second proposition relates to lean management practices, namely the efficiency of human resources and natural resources, reduction of lead time, and reduction of inventory is an activity that can increase added value to the company. The third proposition is related to green management practices, namely environmentally-friendly innovation in the operating system is a strategy to improve the application of environmental management. The synergy between the practice of lean and green supply chain in improving operational performance also results in a fourth proposition, namely the commitment of suppliers (farmer groups) to PG. Krebet will improve company efficiency and environmental performance which may improve product quality and flexibility and reduce costs. Suggestions for further research, which in this case study, can be continued in the entire supply chain from suppliers to consumers to better understand lean and green management practices in all sugar industry supply chain members.
Температурная зависимость проводимости нитевидных кристаллов теллура
Authors: Рабаданов М.Р. , Степуренко А.А. , Гумметов А.Э. , Исмаилов А.М.
Published: March 2021

In the temperature range 77−273K, a comparative analysis of the electrical conductivity of a whisker, an epitaxial film, and a single crystal of tellurium was undertaken. The electrical conductivity of the film and the single crystal increased monotonically up to 200K, then began to rise steeply, corresponding to thermal excitation of intrinsic carriers. The electrical conductivity of whiskers decreased with increasing temperature to 230K, after which it began to increase more gradually. It is assumed that in the case of tellurium whiskers, the classical size effect took place: the decrease in electrical conductivity was due to diffuse scattering of carriers by the lateral surface of the tellurium crystal and was intensified with increasing temperature. The uneven, tightly-convoluted surface of the samples was shown in images
produced in a scanning electron microscope in the nanometer range.
Исследование вольт-амперных характеристик светодиодных гетероструктур на основе InAsSb в диапазоне температур 4.2-300 K
Authors: Семакова А.А. , Баженов Н.Л. , Мынбаев К.Д. , Черняев А.В. , Кижаев С.С. , Стоянов Н.Д.
Published: March 2021

The results of a study of the current-voltage characteristics of LED heterostructures with an active region based on InAsSb solid solutions and InAsSb/InAs and InAsSb/InAsSbP quantum wells (QWs) in the temperature range 4.2–300 K are presented. The mechanisms of the carrier transport depending on the temperature and design of the heterostructure was determined. It is shown that the charge transport through the heterostructures is governed by the diffusion and recombination mechanisms at temperatures close to 300 K; in the temperature range 4.2–77 K, the contribution of the tunnelling mechanism was observed. For heterostructure InAs/InAs/InAs0.15Sb0.31P0.54 the additional channel of the carrier transport was determined. It was shown that the presence of 108 QWs InAs0.88Sb0.12/InAs into the active region of the heterostructure led to an increase in the leakage currents through the heterojunction in the whole temperature range, which is probably related to the tunnelling of charge carriers.
Вольт-амперная характеристика мощных диодных структур с резкой асимметрией инжектирующей способности эмиттеров
Authors: Тандоев А.Г. , Мнацаканов Т.Т. , Юрков С.Н.
Published: March 2021

Рассмотрены диодные структуры с сильной асимметрией инжектирующей способности эмиттеров. В рассматриваемых структурах отношение толщины базового слоя к амбиполярной диффузионной длине было ~1. При большой плотности тока сильная асимметрия инжектирующей способности переходов приводит к реализации, наряду с обычно учитываемыми диффузионным и квазинейтральным дрейфовым режимами переноса носителей заряда, к возникновению и реализации недавно обнаруженного режима DSQD (диффузии, стимулированной квазинейтральным дрейфом). В работе показано, что с ростом плотности тока область, в которой реализуется квазинейтральный дрейфовый режим переноса носителей заряда, схлопывается. При этом на вольт-амперной характеристике диода возникает S-образный участок даже при сравнительно небольших значениях отношения W/L (W --- толщина базового слоя, L --- амбиполярная диффузионная длина). Ключевые слова: перенос носителей заряда в полупроводниках, мощные полупроводниковые диоды, вольт-амперная характеристика диода.
Электрофизические свойства поликристаллических пленок BiFe-=SUB=-0.95-=/SUB=-Co-=SUB=-0.05-=/SUB=-O-=SUB=-3-=/SUB=-
Authors: Романова О.Б. , Кретинин В.В. , Аплеснин С.С. , Ситников М.Н. , Удод Л.В. , Янушкевич -=SUP=-3-=/SUP=- К.И.
Published: March 2021

Semiconductor BiFe0.95Co0.05O3 thin-film compounds were obtained by a flare technique. The surface morphology of the films and the effect of electronic doping by replacing trivalent iron with cobalt ions on the structural, optical, magnetic, and kinetic properties in the temperature range 77-600 K in magnetic fields up to 12 kOe are studied. The existence of two relaxation channels in the impedance spectrum at frequencies of 0.1–1000 kHz has been established. The negative magnetoresistance in the anomalous magnetization region and the maximum magnetoimpedance in the vicinity of the surface phase transition has been found. Using the Hall effect measurements, carrier types prevailing in the magnetoresistance and magnetoimpedance effects has been found. The magnetization anomalies are explained using the model of superparamagnetic clusters and the magnetoresistance is attributed to the scattering of carriers by the spin fluctuations.
Распределение кислородных вакансий во внешнем электрическом поле и кислородная проводимость в акцепторно допированных ионных проводниках флюоритной структуры
Authors: Урицкий М.З.
Published: March 2021

The distribution of current carriers over the lattice sites in the fluorite structure of (AO₂)₁₋ₓ(BO₁.₅)ₓ oxides for the region of not too large values of the dopant concentration in an external electric field has been calculated by solving the basic kinetic equation under stationary conditions. The influence of carrier redistribution in the external field on the value of ionic conductivity and the position of the maximum of its dependence on the impurity content has been studied. The conductivity is considered in the framework of a model in which the impurity effect on transport is reduced to blocking jumps of current carriers along the edges of the oxygen lattice closest to the dopant ions. The analytical results are confirmed by numerical calculations using the Monte Carlo method and can be used to explain the position of experimentally observed maxima of the dependence of conductivity on the dopant concentration in such structures.
Влияние мультиплетных уровней Sm-=SUP=-3+-=/SUP=- и Eu-=SUP=-3+-=/SUP=- на теплоемкость мультиферроика BiFeO-=SUB=-3-=/SUB=-
Authors: Митаров Р.Г. , Каллаев С.Н. , Омаров З.М. , Назарова О.М. , Резниченко Л.А.
Published: March 2021

The temperature dependence of the heat capacity of the multiferroics BiFeO3, Bi0.90Sm0.10FeO3, and Bi0.90Eu0.10FeO3 has been studied. It was found that the substitution of europium and samarium ions for bismuth ions in bismuth ferrite leads to the appearance of an additional heat capacity component due to transitions of 4f - electrons of rare earth ions to higher levels of the multiplet. A connection is established between the decrease in phonon thermal conductivity and the Schottky effect for the specific heat.
Электрические взаимодействия в смесях сегнетоэлектрических порошков хлорида диизопропиламмония и титаната свинца
Authors: Барышников С.В. , Милинский А.Ю.
Published: March 2021

The results of studies of phase transitions in mixtures of C6H16NCl (DIPAC) powders with PbTiO3 by the method of differential thermal analysis (DTA) are pre-sented. The measurements were carried out in the heating and cooling mode in the tem-perature range from 300 to 440 K. It was found that electrical interactions between ferroelectric particles lead to the appearance of additional phase transitions for DIPAC in powder mixtures.
Релаксация напряжений несоответствия в гетероструктурах alpha-Ga-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-/alpha-Al-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=- при образовании дислокаций несоответствия
Authors: Смирнов А.М. , Кремлева А.В. , Шарофидинов Ш.Ш. , Бугров В.Е. , Романов А.Е.
Published: March 2021

We propose the analytical models describing misfit stress relaxation in α-Ga2O3/α-Al2O3 film/substrate heterostructures taking into account the crystal lattices anisotropy of the heterostructure materials. We consider the nucleation of misfit dislocations as a result of basal or prismatic slip in α-Ga2O3/α-Al2O3 heterostructures with various film orientations. We calculate and analyze the dependences of the critical thickness hc (film thickness above which the nucleation of misfit dislocations is favorable) on the angle ϑ between the polar c-axis and the normal to the film growth plane for α-Ga2O3/α-Al2O3 heterostructures. We demonstrate that accounting for elastic constant C14 is not critical in the considered relaxation models for the α Ga2O3/α Al2O3 heterostructures.
Detecting Adverse Drug Events Through the Chronological Relationship Between the Medication Period and the Presence of Adverse Reactions From Electronic Medical Record Systems: Observational Study (Preprint)
Authors: Teramoto Kei , Takeda Toshihiro , Mihara Naoki , Shimai Yoshie , Manabe Shirou , Kuwata Shigeki , Kondoh Hiroshi , Matsumura Yasushi
Published: March 2021

BACKGROUND

Medicines may cause various adverse reactions. An enormous amount of money and effort is spent investigating adverse drug events (ADEs) in clinical trials and postmarketing surveillance. Real-world data from multiple electronic medical records (EMRs) can make it easy to understand the ADEs that occur in actual patients.

OBJECTIVE

In this study, we generated a patient medication history database from physician orders recorded in EMRs, which allowed the period of medication to be clearly identified.

METHODS

We developed a method for detecting ADEs based on the chronological relationship between the presence of an adverse event and the medication period. To verify our method, we detected ADEs with alanine aminotransferase elevation in patients receiving aspirin, clopidogrel, and ticlopidine. The accuracy of the detection was evaluated with a chart review and by comparison with the Roussel Uclaf Causality Assessment Method (RUCAM), which is a standard method for detecting drug-induced liver injury.

RESULTS

The calculated rates of ADE with ALT elevation in patients receiving aspirin, clopidogrel, and ticlopidine were 3.33% (868/26,059 patients), 3.70% (188/5076 patients), and 5.69% (226/3974 patients), respectively, which were in line with the rates of previous reports. We reviewed the medical records of the patients in whom ADEs were detected. Our method accurately predicted ADEs in 90% (27/30patients) treated with aspirin, 100% (9/9 patients) treated with clopidogrel, and 100% (4/4 patients) treated with ticlopidine. Only 3 ADEs that were detected by the RUCAM were not detected by our method.

CONCLUSIONS

These findings demonstrate that the present method is effective for detecting ADEs based on EMR data.
Hiding Multi Short Audio Signals in Color Image by using Fast Fourier Transform
Authors:   Computer Science Department, College of Education for Women-University of Baghdad, Baghdad, Iraq, M. Jamel Enas
Published: March 2021

Many purposes require communicating audio files between the users using different applications of social media. The security level of these applications is limited; at the same time many audio files are secured and must be accessed by authorized persons only, while, most present works attempt to hide single audio file in certain cover media. In this paper, a new approach of hiding three audio signals with unequal sizes in single color digital image has been proposed using the frequencies transform of this image. In the proposed approach, the Fast Fourier Transform was adopted where each audio signal is embedded in specific region with high frequencies in the frequency spectrum of the cover image to save much more details of the cover image and avoid any doubts that there is any secret information are hidden inside it. The quality of the stego-image and the extracted audio files are evaluated with the standard evaluation metric. The simulation results shown significant results of these metrics and achieve good imperceptibility and high security of the stego-image. The SNR and SPCC values are considered acceptance that means significant in terms quality and similarity of the reconstructed signal.
Piskan ställningen
Authors: Livia Prawitz
Published: March 2021

The courtyard, laundry room, and areas for beating carpets are collective facilities in the private sphere of the home. In Stockholm you can find carpet hangers in connection to many apartment blocks even though they are very seldom used nowadays. The act of whipping carpets is an act that aims to get rid of the dirt – the remnants of life. Cleaning is a repetitive work, where something needs to be done over and over again without it producing something new.

The project Piskan ställningen consists of an essay, sound pieces, and sketches in different materials and is divided into three parts; the one who beats, the beater itself, and that which constitutes a stand for the beating. The various associations to the carpet hanger and the carpet beater form the basis of the project that centres around questions concerning repetition and productivity, place and time, the boundary between the public and the domestic sphere, and how dangerous the pursuit of alleged purity, hygiene, science, and light can be. Through text, sound and images, personal and collective memories, and the object's associations regarding reproductive labour, city planning, violence, the welfare project, and childish games are intertwined.
 
The material also contains other associations to control and power – with the whip as a means of threat and punishment, and an exploration of different forms of emptiness in relation to architecture, social structures, and mental space. Through a younger and an elderly woman's narrative voice, we follow an associative thought chain that interweaves the public, the domestic, and a bodily sphere. The setting is a society where she comes home from work to yet another form of monotonous routines, where cars get burned down, and tables are placed under vases, whilst someone has been digging a hole down in the city.
 
Through sketches in different materials, I approach the carpet beater by exploring its shape. My attempts to repeat the knots lead to a series of variations on the memory of whips where mistakes constitute the basis of new forms. In the project repetition and variations in sound, text, and drawing becomes another way of approaching repetitive work
On a study of Sobolev type fractional functional evolution equations
Authors: Huseynov Ismail T. , Ahmadova Arzu , Mahmudov Nazim
Published: March 2021

Sobolev type fractional functional evolution equations have many
applications in the modeling of many physical processes. Therefore, we
investigate fractional-order time-delay evolution equation of Sobolev
type with multi-orders in a Banach space and introduce an analytical
representation of a mild solution via a new delayed Mittag-Leffler type
function which is generated by linear bounded operators. Furthermore, we
derive an exact analytical representation of solutions for
multi-dimensional fractional functional dynamical systems with
nonpermutable and permutable matrices. We also study stability analysis
of the given time-delay system in Ulam-Hyers sense with the help of
Laplace transform.
A useful exercise test for detecting leg malperfusion due to aortic dissection
Authors: Takahashi Baku , Kamohara Keiji
Published: March 2021

We herein report a case of leg malperfusion caused by dynamic
obstruction after aortic dissection diagnosed by the exercise ankle
brachial pressure index test that could not be diagnosed solely by
examining the symptoms and investigations at rest. This case suggests
that exercise can be a key factor in the diagnosis of this complication.
Furthermore, blood pressure elevation can be an exacerbating factor in
dynamic obstruction. We recommend conducting an aggressive evaluation of
the symptoms and medical examinations not only at rest but also under
stress.
Analytical solutions describing the oblique flow of a viscous incompressible fluid around a dendritic crystal
Authors: Alexandrov Dmitri , Galenko Peter
Published: March 2021

This article considers the hydrodynamic problem of an oblique flow of a
viscous incompressible fluid around the tip of a dendritic crystal.
Approximate analytical solutions of Oseen’s hydrodynamic equations are
obtained in 2D and 3D cases using special curvilinear coordinates. It is
shown that the projections of the fluid velocity change significantly
with a change in the flow slope and Reynolds number. The theory
developed in this work has a limiting transition to the previously known
solutions for the rectilinear (without tilt) fluid flow around a
dendrite.
Riemann problem for rate-type materials with non-constant initial conditions
Authors: Radha R. , Sharma Vishnu Dutt , Kumar Akshay
Published: March 2021

In this paper, using the compatible theory of differential invariants, a
class of exact solutions is obtained for nonhomogeneous quasilinear
hyperbolic system of partial differential equations (PDEs) describing
rate type materials; these solutions exhibit genuine nonlinearity that
leads to the formation of discontinuities such as shocks and rarefaction
waves. For certain nonconstant and smooth initial data, the solution to
the Riemann problem is presented providing a complete characterisation
of the solutions.
A numerical approach based on $ n $-dimensional fractional M\”{u}ntz-Legendre polynomials for solving fractional-order cohomological equations with variable coefficients
Authors: Nezhad Akbar Dehghan , Zeabadi Mina Moghaddam
Published: March 2021

This research presents a numerical approach to obtain the approximate
solution of the n-dimensional cohomological equations of fractional
order in continuous-time dynamical systems. For this purpose, the $ n
$-dimensional fractional M\”{u}ntz-Legendre
polynomials (or n-DFMLPs) are introduced. The operational matrix of the
fractional Riemann-Liouville derivative is constructed by employing
n-DFMLPs. Our method transforms the cohomological equation of fractional
order into a system of algebraic equations. Therefore, the solution of
that system of algebraic equations is the solution of the associated
cohomological equation. The error bound and convergence analysis of the
applied method under the $ L^{2} $-norm is discussed. Some
examples are considered and discussed to confirm the efficiency and
accuracy of our method.
Numerical Solution of Volterra-Fredholm Integral Equations with Hosoya Polynomials
Authors: Çelik Ercan , Geçmen Merve
Published: March 2021

In this study, Volterra-Fredholm integral equation is solved by Hosoya
Polynomials. The solutions obtained with these methods were compared on
the ﬁgure and table. And error analysis was done. Matlab programming
language has been used to obtain conclusitions, tables and error
analysis within a certain algorithm.
Lymphangioma of the fetal neck within the PIK3CA-Related-Overgrowth Spectrum (PROS): A case report.
Authors: Scharf Jann Lennard , Gembicki Michael , Dracopoulos Christoph , Hellenbroich Yorck , Offermann Anne , Tharun Lars , Stichtenoth Guido , Tafazzoli-Lari Kianusch , Weichert Jan
Published: March 2021

Neck tumors are rare fetal conditions. They can receive their growth
stimuli by activating missense mutations characterizing disorders with
benign overgrowth, collectively known as
PIK3CA-Related-Overgrowth-Spectrum. This results in segmental overgrowth
with phenotypic variation, genetic heterogeneity or tissue specific
distribution. Thus, clinical and molecular diagnosis as well as
treatment remains challenging.
It is Time to Uncover the Mysterious veil of Atrioventricular Node Pacing
Authors: Ma Cheng-ming , Cha Yong-mei , Dong yingxue , Gao Lianjun , Xia Yunlong
Published: March 2021

Wenckebach phenomenon is a well-known electrophysiological character of
the atrioventricular node (AVN). AVN-pacing during permanent pacemaker
implantation is rare. We herein report the first case of Wenckebach
phenomenon in a heart failure patient with chronic atrial fibrillation
for more than 30 years during the His-bundle pacing (HBP) procedure. The
patient’s symptoms improved significantly. AVN-pacing is available, and
HBP is helpful for cardiac remodeling and clinical outcomes.
The Updated Guide in the Management of Psoriasis for Every Practitioner
Authors: Timis Teodora Larisa , Florian Ioan Alexandru , Vesa Stefan , Mitrea Daniela Rodica , Orasan Remus Ioan
Published: March 2021

Psoriasis is one of the most common chronic cutaneous skin disorders,
having genetic and immunological components. It is currently unknown
what exactly triggers it, or how far reaching are the etiological
factors, although great strides have been made in uncovering the
pathophysiological cascade. Presently, there is a wide diversity of
treatment methods for psoriasis, yet not all are applicable for each
patient. Selection of both drug and dosage depends on both the knowledge
and experience of the treating dermatologist, but also on the specific
characteristics of each patient. Therefore, the treating physicians
should be made aware of the management possibilities, their advantages,
as well as their side effects. Current therapies are divided into
topical, systemic, and biological agents. In the following manuscript,
we present an updated version of these therapies, alongside their
indications, posology and most common side effects, a guide that may be
useful for every practitioner in this field.