bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Long-Term Operation on Physical and Mechanical Properties and Cold Resistance Indicators of Pipe Steel 10G2
Authors: Khlybov A. A. , Kabaldin Yu. G. , Anosov M. S. , Ryabov D. A.
Published: April 2021

Проведено исследование влияния длительности эксплуатации магистрального газопровода на изменение физико-механических характеристик показателей хладостойкости трубной стали 10Г2.Установлено, что в процессе длительной эксплуатации стали 10Г2 в составе магистрального газопровода наблюдается изменение структуры металла, при этом происходит перераспределение перлитной составляющей и укрупнение зерен. Получены значения микротвердости исследуемой стали до и после эксплуатации (10, 25, 40 лет). Длительная эксплуатация (40 лет) материала труб приводит к росту значений микротвердости с 1518 до 2786 HV. Выявлено двукратное снижение значений ударной вязкости стали 10Г2 после старения и эксплуатации в течение 25 лет. Также наблюдается значительное повышение температуры вязко­хрупкого перехода, что снижает надежность магистральных трубопроводов. В результате испытаний стали 10Г2 в широком диапазоне температур после 25 лет эксплуатации наблюдается снижение пластичности металла (относительное удлинение уменьшается примерно в 1,6 раза), повышение предела прочности и снижение предела текучести (до 9 %).Предложена методика неразрушающего контроля деградации механических свойств стали 10Г2 в процессе эксплуатации изделий. Установлена зависимость акустического параметра D, рассчитанного на основе скорости распространения продольных и поперечных упругих волн в металле от срока эксплуатации газовых магистральных труб и температуры вязкохрупкого перехода для стали 10Г2. Показано, что предложенный акустический параметр может выступать в качестве характеристического параметра хладостойкости материала магистральных газопроводов и использоваться при технической диагностике для оценки их остаточного ресурса.Исследование выполнено по гранту РНФ № 19-19-00332 «Разработка научно обоснованных подходов и аппаратно-программных средств мониторинга поврежденности конструкционных материалов на основе подходов искусственного интеллекта для обеспечения безопасной эксплуатации технических объектов в арктических условиях».
Research of the Influence of the Quadrature Components Mismatch on the Noise Immunity of OFDM and UFMC Signals
Authors: Belousov A. Yu. , Khvorenkov V. V.
Published: April 2021

Метод непосредственной модуляции с использованием комплексных сигналов применяется при реализации сигнальных трактов передатчиков в базовых станциях систем сотовой связи. В процессе модуляции возникают рассогласования коэффициента усиления и фазы квадратурных составляющих сигнала. Рассогласование ухудшает модуль вектора ошибки (Error Vector Magnitude, EVM) в приемнике, что, в свою очередь, приводит к повышению частоты появления ошибочных битов (Bit Error Rate, BER). Качество принимаемого сигнала выражается в частоте появления битовых ошибок. Рассогласование амплитуды и фазы квадратурных составляющих является одним из важнейших факторов, вносящих наибольший вклад в амплитуду вектора ошибки, который необходимо исследовать.В статье приведено исследование влияния рассогласования квадратурных составляющих сигналов технологий OFDM (Orthogonal frequency-division multiplexing) и UFMC (universal filtered multi-carrier). Разработана модель передатчика, канала связи и приемника для сигналов OFDM и UFMC. Модель построена в програм­мной среде MatLab при помощи языка MatLab и представляет собой программную модель m-script.В ходе работы путем исследования имитационной модели изучена зависимость помехоустойчивости технологий путем изменения параметров канала связи, таких как амплитудное и фазовое рассогласование квадратурных составляющих сигнала, а также отношение сигнал/шум. Проведен сравнительный анализ таких параметров сигналов, как занимаемая полоса частот, пик-фактор, частота появления битов с ошибкой. По результатам исследования получены графики зависимости вероятности ошибки и пик-фактора сигнала от рассогласования квадратурных составляющих для двух технологий – OFDM и UFMC. Проведенное исследование позволяет выделить преимущества технологии UFMC, которые выражаются в спектральной эффективности, помехоустойчивости и уровне пик-фактора сигнала.
Mathematical Modeling and Controller for PV System by Using MPPT Algorithm
Authors: Issa H. I. , Mohammed H. J. , Abdali L. M. , Al Bairmani A. G. , Ghachim M.
Published: April 2021

In this research, the study theory of system includes the use of an important source of renewable energy sources (solar source) and linking this system with an electrical load. The world is witnessing a significant rise in fossil fuel prices since the ending of the 20th century and now, this rise in price increases with the decrease in inventory day after day. Therefore, it turned that the field of attention to researchers of power generation to expand in non-conventional energy sources (new and renewable energy sources).New and renewable energy is inexhaustible in use because they rely on renewable natural resources. The mathematical model is an important part of the detailed study for PV systems. As well as study models for photovoltaic systems via the MATLAB/Simulink, this programming environment contains many models for renewable systems intended to perform simulation and analysis.Solar cells system needs to apply the MPPT algorithm due to the instability of external circumstances such as solar radiation and temperature.At a constant temperature of 25 °C, as the radiation level increases, the current and voltage of the module increase, this leads to an increase in output power. At a constant radiation level of 100 W/m2, as the module temperature increases, the current increases and the voltage decreases, this causes the output power to decrease. The maximum power is reached at 17 V and 3.5 A by the MPPT method. The Perturb and Observe algorithm is used to achieve maximum power.
A universal scheme for robust self-testing in the prepare-and-measure scenario
Authors: Miklin Nikolai , Oszmaniec Michał
Published: April 2021

We consider the problem of certification of arbitrary ensembles of pure states and projective measurements solely from the experimental statistics in the prepare-and-measure scenario assuming the upper bound on the dimension of the Hilbert space. To this aim, we propose a universal and intuitive scheme based on establishing perfect correlations between target states and suitably-chosen projective measurements. The method works in all finite dimensions and allows for robust certification of the overlaps between arbitrary preparation states and between the corresponding measurement operators. Finally, we prove that for qubits, our technique can be used to robustly self-test arbitrary configurations of pure quantum states and projective measurements. These results pave the way towards the practical application of the prepare-and-measure paradigm to certification of quantum devices.
Multiple-shot and unambiguous discrimination of von Neumann measurements
Authors: Puchała Zbigniew , Pawela Łukasz , Krawiec Aleksandra , Kukulski Ryszard , Oszmaniec Michał
Published: April 2021

We present an in-depth study of the problem of multiple-shot discrimination of von Neumann measurements in finite-dimensional Hilbert spaces. Specifically, we consider two scenarios: minimum error and unambiguous discrimination. In the case of minimum error discrimination, we focus on discrimination of measurements with the assistance of entanglement. We provide an alternative proof of the fact that all pairs of distinct von Neumann measurements can be distinguished perfectly (i.e. with the unit success probability) using only a finite number of queries. Moreover, we analytically find the minimal number of queries needed for perfect discrimination. We also show that in this scenario querying the measurements in parallel gives the optimal strategy, and hence any possible adaptive methods do not offer any advantage over the parallel scheme. In the unambiguous discrimination scenario, we give the general expressions for the optimal discrimination probabilities with and without the assistance of entanglement. Finally, we show that typical pairs of Haar-random von Neumann measurements can be perfectly distinguished with only two queries.
COVID-19 Pandemic Management: Best Practices and Lessons From China, Japan and South Korea
Authors: Govindasamy Geetha , Md Akhir Md Nasrudin , Paidi Rohayati
Published: April 2021

The management of COVID-19 pandemic is a reflection of how prepared states are when faced with a trans-boundary crisis. China, Japan and South Korea chose different strategies in containing the pandemic. All three were significantly successful in containing the pandemic in the initial stages. By using a qualitative approach, this article examines the timeline of events, measures are taken during the crisis to contain the coronavirus and the challenges faced in avoiding the further spread of the virus. The importance of early detection, defined procedures, the use of digital tools and possessing enough protective medical equipment and facilities are discussed at length. Since China, Japan and the Republic of Korea have been more successful in containing the virus compared to advanced economies, this research finds that the management practices of these East Asian countries inform policymakers in the future implementation of an infectious disease response strategy.
Personal and Environmental Factors that Influence the Ecological Behaviour of Energy-Efficient Appliance Purchases
Authors: Chan Sai-Keong , Quoquab Farzana , Basiruddin Rohaida
Published: April 2021

This study investigates the effects of personal and environmental factors on ecological beliefs and ecological behaviour and assesses the mediating and moderating influences in this model. This study utilises 592 questionnaire surveys among Malaysian consumers. A partial least squares technique (PLS) was utilised to analyse the data and to test the study hypotheses. The findings show that personal and environmental factors have a positive influence on ecological beliefs and ecological behaviour; ecological beliefs are positively related to ecological behaviour. Additionally, ecological beliefs mediate the relationship between personal factors and ecological behaviour, and the relationship between environmental factors and ecological behaviour. The present study is among the pioneers in including environmental factors and ecological beliefs in pro-environmental studies. In the context of energy-efficient appliance purchases, the findings elaborate on the existing knowledge of personal and environmental factors, and individual’s beliefs.
Engaging Family Medicine Residents in a Structured Patient Panel Reassignment Process
Authors: Compton Rebekah , Sebring Amanda , Dalrymple Sarah , Rollins Lisa K.
Published: April 2021

Background and Objectives: The patient panels of graduating residents must be reassigned by the end of residency. This process affects over 1 million patients annually within the specialty of family medicine. The purpose of this project was to implement a structured, year-end reassignment system in a family medicine residency program.
Methods: Our structured reassignment process took place from December 2017 through June 2020. Panel lists of current, active patients were generated and residents were responsible for reassigning their own panels during a panel reassignment night. We created a tip sheet that addressed patient complexity and continuity, a risk stratification algorithm based on patients’ medical and social complexity, and a tool that tracked the number of patients assigned to each future provider. Outcome measures included a resident satisfaction survey administered in 2018-2020 and patient-provider continuity measured with a run chart from December 2016 through August 2020.
Results: The resident survey response rate was 75%. Seventy-three percent felt the panel reassignment night was very helpful; 87% thought the reassignment timeline was extremely reasonable, and 87% indicated that they had the necessary information to reassign their patients. Residents also felt confident that their patients were reassigned appropriately (33% extremely confident, 67% somewhat confident). Patient continuity improved with a 13-point run above the median, indicating nonrandom variation. Patient continuity remained above the median until the impact of COVID-19 in April 2020.
Conclusion: Our structured reassignment process was received positively by residents and resulted in improved patient continuity.
Effects of Implementing an Interactive Substance Use Disorders Workshop on a Family Medicine Clerkship
Authors: Cantone Rebecca E. , Hanneman Nonda S. , Chan Matthew G. , Rdesinski Rebecca
Published: April 2021

Background and Objectives: Substance use disorders (SUD) remain a public health crisis and training has been insufficient to provide the skills necessary to combat this crisis. We aimed to create and study an interactive, destigmatizing, skills-based workshop for medical students to evaluate if this changes students’ self-reported knowledge, skills, and attitudes toward patients with SUD.
Methods: We surveyed students on a required family medicine outpatient rotation at a Pacific Northwest medical school during clerkship orientation on their views regarding SUDs utilizing the validated Drug and Drug Problems Perceptions Questionnaire containing a 7-point Likert scale. After attending a substance use disorder workshop, they repeated the survey. We calculated differences between the paired pre- to postsurveys.
Results: We collected the pre- and postdata for 118 students who attended the workshop and showed statistically significant positive differences on all items.
Conclusions: The positive change in the medical students’ reported attitudes suggests both necessity and feasibility in teaching SUD skills in a destigmatizing way in medical training. Positive changes also suggest a role of exposing students to family medicine and/or primary care as a strategy to learn competent care for patients with substance use disorders.
Reducing phenotypic instabilities of microbial population during continuous cultivation based on cell switching dynamics
Authors: Nguyen Thai , Telek Samuel , Zicler Andrew , Martinez Juan Andres , Zacchetti Boris , Kopp Julian , Slouka Christoph , Herwig Christoph , Grünberger Alexander , Delvigne Frank
Published: April 2021

Predicting the fate of a microbial population (i.e., growth, gene
expression…) remains a challenge, especially when this population
is exposed to very dynamic environmental conditions, such as those
encountered during continuous cultivation. Indeed, the dynamic nature of
continuous cultivation process implies the potential deviation of the
microbial population involving genotypic and phenotypic diversification.
This work has been focused on the induction of the arabinose operon in
Escherichia coli as a model system. As a preliminary step, the GFP level
triggered by an arabinose-inducible ParaBAD promoter has been tracked by
flow cytometry in chemostat with glucose-arabinose co-feeding. For a
large range of glucose-arabinose co-feeding, the simultaneous occurrence
of GFP positive and negative subpopulation was observed. In a second set
of experiments, continuous cultivation was performed by adding either
glucose or arabinose, based on the ability of individual cells for
switching from low GFP to high GFP states, according to a technology
called segregostat. In segregostat mode of cultivation, on-line flow
cytometry analysis was used for adjusting the arabinose/glucose
transitions based on the phenotypic switching capabilities of the
microbial population. This strategy allowed finding an appropriate
arabinose pulsing frequency, leading to a prolonged maintenance of the
induction level with limited impact on phenotypic diversity for more
than 60 generations. This result suggests that constraining individual
cells into a given phenotypic trajectory is maybe not the best strategy
for directing cell population. Instead, allowing individual cells
switching around a predefined threshold seems to be a robust strategy
leading to oscillating, but predictable, cell population behavior.
Forecasting Machine Failure Using DMG and Weibull Analysis in an Automotive Industry: A Case Study
Authors: Shah Kamran , Khurshid Hassan , Haq Izhar Ul , Ali Shah Shaukat , Ali Zeeshan
Published: April 2021

In manufacturing or production setup, maintenance cost is one of the major portions of overall operating expenditure. It can vary between 15 to 60 percentage of overall cost for various industries including food related industries, iron, steel and other heavy industries. Such a high cost directly impacts manufacturing setup, profitability and sustainability in long run. In most of the industries, ineffective maintenance management can result in loss of capital and inefficient human resource deployment. This in turn affects the plants’ ability to manufacture quality products that are competitive in the market. Various maintenance management strategies including Operate to Failure (OTF), Design Out Maintenance (DOM), Skill Level Upgrade (SLU), ConditionBased Monitoring (CBM) and Fixed Time Maintenance (FTM) are used in industries for maximizing productivity. In recent years, Computerized Maintenance Management System (CMMS) has become an integral part of most of the industries so its importance and characteristics cannot be understated. While CMMS cannot live standalone, it requires some decision-making techniques to be equipped with. These techniques range from Failure Mode and Effect Analysis (FMEA) to Decision Making Grid (DMG). In this paper, concept of DMG has been applied to an automotive parts Manufacturing Industry in conjunction with Weibull analysis. Parallels are drawn between the results of DMG and Weibull analysis.
The effect of weed control timing on the growth and yield of upland rice (Oryza sativa L.)
Authors: Emmanuel Kolo , Aremu Adigun , Raphael Adeyemi , Samuel Daramola , Jacob Bodunde
Published: April 2021

Weed interference is a major threat to rice production, leading to high yield
reduction and reduced profitability. Therefore, field experiments were
conducted to evaluate the effect of the different timings of weed control on
the growth and yield of upland rice in the 2015 and 2016 cropping seasons.
The treatments consisted of periods when the crop was allowed to be
weed-infested for the first 3, 6 and 9 weeks after sowing (WAS) and periods
when the weeds were controlled for the first 3, 6 and 9 WAS. Two treatments
of weed infestation and weed control until harvest were also included as the
checks in a randomized complete block design with three replications. In
both years, rice grain yields ranged from 0.6 to 0.8 t ha-1 in plots kept
weed-infested until harvest, and from 3.5 to 3.9 t ha-1 in plots kept
weed-free until harvest, indicating a 79-83% yield loss with uncontrolled
weed growth. Weed infestation for the first 3 WAS did not cause a
significant reduction in the growth and yield of rice provided the weeds
were removed thereafter. However, the delay in weed control until 9 WAS
reduced rice growth and resulted in irrevocable yield reduction. It was only
necessary to remove the weeds between 3 and 9 WAS for optimum grain yield,
as no significant yield increase was observed in weed control after 9 WAS in
both years. This study showed that weed control between 3 and 9 WAS would
give the optimum growth and yield of upland rice.
Filter design using data fusion for a pneumatic control valve
Authors: Navada Bhagya , Venkata Santhosh
Published: April 2021

This paper presents a filter design technique for a pneumatic valve using
data fusion techniques. The objective of this paper is to examine the
suppression of the effect of parameters causing deviation from normal system
performance using the technique of data fusion over time. The output of a
system affected by inherited noise is processed by applying operations such
as finding the statistical variance, time warping, interpolation, and
extrapolation. These techniques are used to compute the transfer function of
the filter, which when cascaded with the system will suppress the effect of
noise on the process. The operation of the control valve is affected by
characteristics such as stiction, structural deformation, etc. The
characteristics of the system are studied and data for multiple time
instances are extracted to carry out fusion across time by dynamic time
warping. Tests show that the filter presented here can suppress the effects
of stiction and mechanical deformation on the output signal.
An energy efficient hybrid MAC protocol for smart home networks
Authors: Pandey Atul , Gupta Nisha
Published: April 2021

In this paper cluster-based hybrid MAC (CB-HMAC) protocol, based on IEEE
802.15.4 MAC is proposed for smart home networks. The CB-HMAC is specially
designed for short packet transmission in a dense home network environment.
Simulation results show that the proposed CB-HMAC is more energy-efficient
than other medium access control (MAC) protocols without sacrificing much
delay and throughput.
Corrigendum on: Big Data and development of smart city: System architecture and practical public safety example [Serb. Jour. of Elect. Eng., Vol. 17, No. 3, Oct. 2020, pp. 337 - 355]
Authors: Editorial E
Published: April 2021

The authors of the paper entitled "Big Data and Development of Smart City:
System Architecture and Practical Public Safety Example", Mirko Simic,
Miroslav Peric, Ilija Popadic, Dragana Peric, Milos Pavlovic, Miljan Vucetic
and Milos S. Stankovic, informed the Editor about the error in the position
of the author Miljan Vucetic, who should be at the third position. The
authors have requested for this error to be corrected. Therefore, the
journal is publishing this Corrigendum. The authors of this article should
be listed as follows: Mirko Simic, Miroslav Peric, Miljan Vucetic, Ilija
Popadic, Dragana Peric, Milos Pavlovic, Milos Stankovic.

 Link to the corrected article 10.2298/SJEE2003337S
Analysis of thermal and gas-dynamic characteristics of different types of propellant in small weapons
Authors: Boukera Abaci , Hristov Nebojsa , Ziane Ahmed , Jerkovic Damir , Savic Slobodan
Published: April 2021

This paper presents a numerical and an analytical approach for calculation of internal ballistics parameters through determination of thermal and gasdynamic characteristics. The calculated parameters are validated through experimental tests on a real weapon system. The internal ballistic calculations are provided for two types of propellants using an analytical and a numerical model. Calculations and tests are performed for an anti-material rifle 12.7 mm. Weapon and ammunition testing is carried out according to the permanent international commission standard. Theoretical and experimental results for the gunpowder gases pressure and the muzzle velocity are compared. The good agreements between the calculated and the measured pressures and velocities increase the reliability of the estimated gunpowder gas temperatures in the barrel. The obtained results enable analysis and comparison of the output internal ballistics parameters for different types of propellant applications.
Division of paraffin melting zone based on multiscale experiments
Authors: Li Xiaoqing , Liu Renqiang , Zhang Tianyu , Yu Peng , Liu Xiaoyan
Published: April 2021

Phase change energy storage materials are widely used in the field of renewable energy. Paraffin is one of the common phase change energy storage materials. As a multi-component hydrocarbon mixture, the melting of paraffin is different from that of pure substance. In addition the solid and liquid zones, there is also a fuzzy zone in which solid and liquid coexist. In this paper, the melting characteristics of paraffin in phase transition zone are studied by multi-scale experiments. Through the visualization experiment of square cavity paraffin melting, the solid zone, fuzzy zone and liquid zone are determined, and the moving process of phase interface is tracked by digital pictures and infrared heat maps. The evolution process of the pore structure in the fuzzy zone under different temperatures is photographed by means of the micro-experiment, and it is revealed that there are two areas in the fuzzy zone, porous media area and multi-phase flow area. The results show that the melting process of paraffin can be divided into four zones: liquid zone, multi-phase flow zone, porous media zone, and solid phase zone. According to the polarizing optical microscopy picture, the continuous phase and discrete phase transition relationship between solid wax crystal and liquid paraffin is captured. The polarizing optical microscopy picture is statistically analyzed, and the critical liquid phase ratio of the transition from porous media area to multi-phase flow area is given under experimental conditions.
Heat dissipation performance of grooved-type and copper foam-type vapor chambers
Authors: Wang Leiqing , Zhang Donghui , Chen Yi , Sun Lili , Mao Jijing
Published: April 2021

Both grooved-type and copper foam-type vapor chambers are explored and investigated. The overall performance of vapor chamber depends on both axial and spread thermal resistance mutually. The copper foam-type vapor chambers achieved the lowest axial thermal resistance less than 0.2 K/W. The grooved-type sample presented the lowest spread thermal resistance, indicating better temperature uniformity. The visual experiment demonstrated that the evaporating surface of the copper-foam vapor chamber was dominated by the thin film evaporation mechanism at low charging ratio while dominated by the pulsed pool boiling mechanism at large charging ratio. For the grooved-type vapor chamber, the pool boiling mode was observed at any charging ratio.
Numerical study on flame and emission characteristics of a small flue gas self-circulation diesel burner with different spray cone angles
Authors: Xie Kai , Zhang Jie , Qin Changlin , Tan Xiufeng , Cui Yunjing
Published: April 2021

The problems of long flame and high pollution emissions in low power burners are of wide concern in small heating devices. To solve this problem, a small diesel burner with self-circulation flue gas was designed herein. In order to obtain a deeper scientific understanding of the flame and emission characteristics of the burner with different spray cone angles, a numerical calculation method was used to investigate them. Reasonable flow, heat transfer, and combustion models were selected, and periodic boundary conditions were used to verify the feasibility of the numerical model. The results indicate that the flame length increases with increasing spray cone angle, and then the flame length basically stabilizes at 410 mm. The maximum flame temperature decreases slightly with increasing spray cone angle. Besides this, the NO emission of this small flue gas self-circulation burner decreases with increasing spray cone angle and is as low as 10 ppm at an 80? spray cone angle. In addition, the influence mechanism of the spray cone angle on the flue gas self-circulation ratio was analyzed from the physical aspect of the spray area and the chemical aspect of combustion. This study is of great significance to research on the flame morphology of small flue gas self-circulation burners and the selection of different spray cone angles.
Goodwill Impairment and Audit Effort
Authors: Ghosh Al (Aloke) , Xing Cunyu
Published: April 2021

SYNOPSIS

Using abnormal audit fees to capture added charges associated with incremental audit effort beyond the effort level needed under normal circumstances, we find that the incremental audit effort is positively associated with goodwill to total assets. Additionally, when goodwill is impaired, auditors exert incrementally more effort for testing the magnitude of a goodwill impairment loss than when goodwill is not impaired. Further, we document predictable temporal and cross-sectional variations in audit effort and goodwill relationship. As the accounting standards became more (less) stringent, there is a corresponding increase (decrease) in audit effort. The effort also varies cross sectionally with auditor quality. We also find that only a goodwill impairment loss is associated with longer audit delays. Finally, we provide corroborating evidence based on survey responses obtained from expert auditors. Our results contradict the perception that auditors do not exert incrementally more effort when testing goodwill for impairment.

JEL Classifications: M40; M42; C42.
“Letras negras” em Quartos de Despejo: diálogos entre Carolina Maria de Jesus, o hip-hop e os letramentos
Authors: Gomes Vanilce Farias , Sathler Conrado Neves
Published: April 2021

O presente trabalho objetiva apontar a conectividade entre a música “Letras Negras” de 2017, de Larissa Luz, e o livro Quarto de despejo: diário de uma favelada de 1960, de Carolina Maria de Jesus. A canção escolhida faz parte do Movimento Hip-Hop, entendido como agência de letramento e produção de saberes da educação não formal. Filiados à Análise do Discurso e aos Estudos Feministas Negros e tendo a educação não formal como foco, serão analisadas as regularidades presentes nos objetivos do Movimento Negro Brasileiro e do Movimento Hip-Hop na construção da coletividade, pertencimento e elevação da autoestima de negra/os e como esses aspectos são expressos nas obras analisadas. Concluiu-se que ambos os Movimentos contêm processos educativos e podem ser considerados infames na perspectiva foucaultiana e, a partir de sua sobrevivência ao choque com o poder, tornaram-se mecanismos de denúncia e resgate das subjetividades negras silenciadas pela supremacia branca por meio de opressões interseccionais.
ANALISIS FAKTOR YANG MEMENGARUHI PENURUNAN DISIPLIN SISWA SELAMA PEMBELAJARAN ONLINE AKIBAT PANDEMI COVID-19
Authors: 'Umdatun Ni'mah  , David Ari Setyawan
Published: April 2021

Penelitian ini dilatarbelakangi oleh terdapatnya banyak siswa yang mengalami penurunan kedisiplinan selama pembelajaran online, baik itu dalam mengikuti pembelajaran online, dalam hal mengumpulkan tugas, maupun dalam hal lainnya. Penelitian ini membahas mengenai faktor-faktor yang memengaruhi penurunan disiplin siswa atau peserta didik selama pembelajaran online. Penelitian ini bertujuan untuk mengetahui dan menganalisis faktor-faktor yang memengaruhi penurunan disiplin siswa selama pembelajaran online akibat pandemi Covid-19. Metode penelitian yang digunakan dalam penelitian ini yaitu metode penelitian deskriptif kualitatif. Data dalam penelitian penulis dapatkan melalui artikel dan juga buku yang memiliki relevansi dengan artikel ini. Untuk mendukung data kepustakaan atau literatur tersebut, data juga didapatkan dengan melakukan wawancara. Berdasarkan data yang telah diperoleh dalam penelitian, hasil penelitian menunjukkan bahwa terdapat beberapa faktor yang memengaruhi penurunan disiplin siswa selama pembelajaran online akibat pandemi Covid-19, yaitu (1) menurunnya motivasi belajar siswa, (2) sarana dan prasarana yang kurang memadai, (3) minimnya waktu luang orang tua, dan (4) penggunaan gawai yang berlebihan.
IMPLEMENTASI BLENDED LEARNING DALAM MATA KULIAH ULUMUL QUR’AN PADA PASCASARJANA UNIVERSITAS ISLAM NEGERI ALAUDDIN MAKASSAR
Authors: Achmad Achmad Abubakar , Yani Ahmad , Syatar Abdul
Published: April 2021

This study aims to see the implementation of blended learning in Ulumul Qur'an courses at uin Alauddin Makassar Postgraduate. The method used in this study uses a type of qualitative research related to the implementation of Blended Learning Courses Ulumul Qur'an at the Postgraduate UIN Alauddin Makassar. The results showed that: (1) the description of the model of implementation of the implementation of the study blended Ulumul Qur'an courses at the Postgraduate UIN Alauddin Makassar using a dual-system that is a combination of conventional systems with online. More use of online learning systems during the Pandemic (80%) compared to traditional face-to-face learning systems. The merger of the two systems includes the incorporation of learning resources as well (learning modules, textbooks, and journals), the implementation of learning (online discussions, watching videos, and accessing supporting resources, and the incorporation of a learning evaluation system, including standardized assessment through quizzing, midterm exams, and final exams. (2) the results of the implementation of blended learning in Ulumul Qur'an courses are illustrated from five main aspects, namely (a) increased utilization of various sources, (b) increased active participation, (c) increased ability to construct knowledge, (d) activation of feedback, and (e) improvement of academic achievement
Sensitivity Analysis of the Waterproof Performance of Elastic Rubber Gasket in Shield Tunnel
Authors: Wang Zhiqiang , Lei Zhenyu
Published: April 2021

In order to study the waterproof performance of elastic rubber gasket in shield tunnel lining joints, an innovative sensitivity analysis method is proposed by combining the Monte Carlo method with the stochastic finite element method (FEM) in this paper. The sensitivity values of the waterproof performance respecting to elastic rubber gaskets are obtained via the ANSYS Probabilistic Design System (PDS) module, in which the parameters of material hardness, coordinates of the hole center, apertures are selected as random input variables. Meantime, the extent of the tolerance effect of the random parameters on the waterproof performance is explored.
Alfonso Visconti, a Diplomat in the Service of the Holy See at the Court of Zsigmond Báthory
Authors: Boccolini Alessandro
Published: April 2021

This research focuses on the life of Cardinal Alfonso Visconti reconstructing the years of his religious formation until his arrival in Rome: from the activity carried out at the Congregation of the Oratory founded by San Filippo Neri, to the diplomatic career conducted in the service of the Holy See. After serving in Portugal and Prague, at the court of Rudolf II, between 1595 and 1598 he was sent on a diplomatic mission, as nuncio, to the Prince of Transylvania Zsigmond Báthory. His mission took place in a dramatic historical phase for Danubian-Balkan Europe, threatened by the power of the Turkish “infidel”.

The article aims to reconstruct the main phases of Visconti’s difficult mission, which had been sent to this peripheral part of the continent, but very important on a geopolitical level, with the aim of creating the anti-Turkish crusade so much desired by Pope Clement VIII
Nicolae Haralambie and the Abdication of Alexandru Ioan Cuza
Authors: Bichicean Gheorghe
Published: April 2021

The present study contributes to the knowledge of less known aspects regarding the dethroning of Prince Alexandru Ioan Cuza and of the important role that the army had in the plot. It highlights the personality of a great officer, Nicolae Haralambie, who was attracted to the conspiracy through a woman.
“Long Live Greater Romania!”: The Great Union Day - Gender Perspectives
Authors: Fodor Georgeta
Published: April 2021

The present paper explored the Great Union Day which marked the union of Transylvania with Romania from a gender perspective. The Great Union Day is well approached in Romanian historiography yet less is known about women’s presence and reactions to this historical day. We have indeed the figures but they do not reveal the whole range of emotions, reactions of women thus the study focused on these aspects through the analysis of such historical records as memoires, journals, public speeches and official documents.
The Diplomatic Action of Pietro Quaroni. The Relations between Italy and the USSR in the Period between 1944 and 1945
Authors: Randazzo Francesco
Published: April 2021

The present study approaches the subject of the diplomatic relation between Italy and the Soviet Union during 1944 and 1945 beginning with 27th May 1944 when Pietro Quaroni, a career diplomat, presented the credentials of ambassador.
Historical Considerations Regarding the Creation of the Cuban National Identity
Authors: Scheianu Adrian
Published: April 2021

Although the revolutionary outbreak of the Spanish colonies in the Americas was sudden and apparently unplanned it was, in fact, a long process, during which colonial economies underwent growth, societies developed identities, ideas advanced to new positions and Spanish Americans began conscious of their own culture and jealous of their own resources. In Cuba the process of creating a national identity displays similarities with what happened in the former European colonies from the two Americas, turned into independent states but, on the other hand, shows different characteristics that make Cuba an exceptional case among the nations of the New World. A number of factors of different natures, as well as the vicinity of a state that from the second half of XIXth century is paving the way for a great power, helped to keep Cuba in Spanish hands until the end of the XIXth century long after the other colonies of the Spanish empire had fallen to local settler armies elsewhere. This short study aims to illustrate some aspects regarding the historical dynamics in the build up of a Cuban national identity.
Airborne Oblique Imaging: Towards the Hybrid Era
Authors: Toschi Isabella
Published: April 2021

If the use of oblique aerial camera systems is steadily growing for 3D capture of urban areas, their combination with a LiDAR unit seems to have all the potential to lead the airborne mapping sector a step forward. To fully exploit the complementary sensor behaviour, a new perspective should be adopted that looks beyond the traditional data processing chains and extends them towards an hybrid data processing concept. Assisted tie point matching, integrated sensor orientation and augmented 3D reconstruction are the keystones of a rigorous hybrid workflow for hybrid sensors. They should all rely on a deep understanding of the different properties of active and passive 3D imaging, and of the uncertainty components in their measurements. The paper will focus on the most recent answers to these issues, that open new opportunities for boosting the quality of the geospatial products w.r.t completeness, geometric quality, object detection and processing efficiency
Delineation of the Groundwater Potential Using Remote Sensing and GIS: A Case Study of Ulhas Basin, Maharashtra, India
Authors: Doke Arjun
Published: April 2021

Groundwater is one of the most valuable natural resources which is essential for the environmental, biological and socio-economic activities. The present paper aims to delineate groundwater potential of Ulhas basin in India through remote sensing and geographical information system. Several groundwater influencing factors such as geology, geomorphology, slope, landuse, rainfall, lineaments are mapped in GIS environment. Later, these factors were ranked on the basis of their influence on the groundwater potential of a region. After that all these factors were integrated together in GIS environment to prepare the groundwater potential map of Ulhas basin. By implementing influencing factor, it is observed that about 21%, 50% and 29% areas are falling under high, moderate, and low groundwater potential zones, correspondingly. The present study is highly valuable to the policymakers, administrative bodies, engineers for management of groundwater and preparing sustainable water resource plans in Ulhas basin. Additionally, the present paper will help to construct artificial groundwater recharge plan in the study area.
Using LiDAR Point Clouds in Determination of the Scots Pine Stands Spatial Structure Meaning in the Conservation of Lichen Communities in “Bory Tucholskie” National Park
Authors: Wężyk Piotr , Hawryło Paweł , Szostak Marta , Zięba-Kulawik Karolina , Winczek Monika , Siedlarczyk Ewa , Kurzawiński Adam , Rydzyk Justyna , Kmiecik Jowita , Gilewski Wojciech , Szparadowska Monika , Warchoł Artur , Turowska Agnieszka
Published: April 2021

The aim of the research carried out in 2018 and financed by the Forest Fund was the analysis of biometric features and parameters of pine stands in the area of the “Bory Tucholskie” National Park (PNBT), where a program of active protection of lichen was initiated in 2017. Environmental analyses were conducted in relation to selected biometric features of trees and stands using laser scanning (LiDAR), including ULS (Unmanned Laser Scanning; RIEGL VUX-1) and TLS (Terrestrial Laser Scanning; FARO FOCUS 3D; X130). Thanks to the application of LiDAR technology, the structure of pine stands was precisely determined by means of a series of descriptive statistics characterizing the 3D spatial structure of vegetation. Using the Trees Crown Model (CHM), the analysis of the volume of tree crowns and the volume of space under canopy was performed. For the analysed sub-compartments, GIS solar analyses were carried out for the solar energy reaching the canopy and the ground level due to active protection of lichen. Multispectral photos were obtained using a specialized RedEdge-M camera (MicaSense) mounted on the UAV multi rotor platform Typhoon H520 (Yuneec). Flights with a thermal camera were also performed in order to detect places on the ground with high temperature. Plant indices: NDVI, NDRE, GNDVI and GRVI were also calculated for sub-compartments. The data obtained in 2017 and 2018 were the basis for spatial and temporal analyses of 4-D changes in stands which were related to the removal of some trees and organic layer (litter, moss layer).
The Problem of Using and Measurement of Identifiable Ground Control Points on High Resolution Aerial Images
Authors: Kurczyński Zdzisław , Bakuła Krzysztof , Pilarska Magdalena , Ostrowski Wojciech
Published: April 2021

This paper shows the influence of the selection of photogrammetric control points as natural, identifiable points instead of signalized, premarked control points on the results of aerial triangulation of high-resolution aerial images with GSD below 10 cm. In the experiment, different selections of controls were tested using point-type and linear-type points with measurement of their centre or corner. In the experiment, 2 blocks with GSD of 5 and 10 cm were selected using the same measurements in 4 tested approaches with sets of natural identifiable points used by comparing the result with the reference variant. The experiment proves the possibility of using natural controls instead of premarked controls for images of urban areas. This can significantly reduce the cost of photogrammetric missions in urban areas where it is easy to find uniquely identifiable control points that can be used for image orientation.
Assessment and Bibliometric Review of Scientific Achievements Published in the Archives of Photogrammetry, Cartography and Remote Sensing
Authors: Bakuła Krzysztof , Kurczyński Zdzisław
Published: April 2021

The Archives of Photogrammetry, Cartography and Remote Sensing is a journal which, in the era of technological development of photogrammetry and remote sensing and changes related to cartography in the field of common digitization of sources and processing of spatial information in GIS environment, has been one of the most popular places for publishing articles in this field in Poland for years. Thirty volumes published throughout 25 years have provided nearly 1000 scientific articles and monographic studies summarizing the scientific work of several hundred authors from dozens of scientific institutions and production companies in Poland. This article is an attempt to summarize the achievements published in the journal in the field of bibliometric evaluation and statistical data of the publications from the time of the existence of this inter-association journal. The text quotes the history of the journal, indicates statistics on the number of articles, their citation with the most popular items, authors, reviewers. This evaluation was compared with other national and foreign journals.
Compendium of current ceramic materials used for the CAD/CAM dentistry.
Authors: Hynková Kristýna , Voborná Iva , Linke Bernard , Levin Liran
Published: April 2021

Nowadays, patients require the highest quality of treatment, but generally prefer to spend as little time as possible in the dental chair. Therefore, there is significant benefit for using new technologies such as CAD/CAM (computer aided design/computer aided manufacturing), which provides both quality and speed. There is an increase in ceramic materials and ceramic blocks/discs available, with varying properties. This has resulted in some confusion and difficulty in making an informed decision about which material is best for a specific clinical situation. The objective of this review is to provide an overview and comparison of basic mechanical properties of currently used CAD/CAM ceramic materials based on a review of the currently available literature.
Building Orientation as the Primary Design Consideration for Climate Responsive Architecture in Urban Areas
Authors: Sinha Alisha
Published: April 2021

Orientation is a design parameter that plays a major role in climate responsive architecture and helps achieve comfort within the built environment. However, it is difficult to achieve an ideal orientation, especially in urban context. The main aim of this paper is to develop alternate strategies to overcome the challenges faced in designing as per preferred orientation and then derive a set of tools that can help decide the orientation of a building on site both under normal and congested site conditions. Thereafter, the inferences from the paper can act as references for choosing an optimum orientation for placement of buildings in warm humid climate. It can act as a significant pedagogical guideline for students of architecture in deciphering solutions for a climate responsive design in a simplified manner. The results can also be utilised for future research in formulating similar tools for other climatic regions.
Affective and Cognitive Dimensions of Trust in Communication
Authors: Kovács Barna
Published: April 2021

Based on the complexity of communication acts, the paper presents how affective and cognitive aspects are intertwined. First of all, the context of trust and the conditions of its appearance are examined. It is followed by an analysis of trust as an attitude which reveals the difference between contractual approaches and alliances. The relationship between communication and trust is presented by the illocutionary acts. As a result of the analysis, trust can be conceived as a positive attitude of expectation, where one person relies on the assumed good faith, suitability, and sensitivity of the other person, where, although vulnerable, the one who trusts counts on the fact that the trusted person will not abuse his/her position but rather provide assistance to his/her best knowledge in a given area. Cognitive trust is reinforced if the proper data are available, understandable, fit into prior knowledge, and anticipate the possible forms of operation. With affective trust, the issue is not data quality and quantity but rather the way how they are presented.
Project (I)solation – Everyday Life and Media Use During the COVID-19 Pandemic
Authors: Guld Ádám
Published: April 2021

The pandemic has placed our relationship with digital media in a new context. Regardless of age, the isolation had significant impact on our everyday routines, of which media use has become a constant factor in one form or another. We may have never tried to use so many new applications in such a short time before, as for many of us media was the only connection to the outside world. However, after the quarantine, there are several questions that may arise following the extreme situation. Were we captured or rather liberated by the online media? What did we learn about online life and our relationship with the media during the epidemic? How could the digital generation adapt itself to the new circumstances? What challenges and problems did Generation Z face during the quarantine? How have young people’s daily routines, media use patterns, news consumption, learning and/or working habits changed? How about their general attitudes towards the media and their effects on them? In the study below, I seek answers to these questions based on the results of an international, interdisciplinary research project called TOGETHER initiated by the University of Pécs (Pécs, Hungary) and Hochschule für Kommunikation und Gestaltung (Stuttgart, Germany).