bluuebunny/crossref_metadata_2025 huggingface dataset:
The influence of boron addition on properties of copper-zirconium alloys
Authors: Simic M. , Ruzic J. , Bozic D. , Stoymenov N. , Goshev S. , Karastoyanov D. , Stasic J.
Published: March 2023

Copper-zirconium alloys with high conductivity were produced using powder metallurgy. Two-steps manufacturing process, containing mechanical alloying followed by hot pressing, was applied in achieving improved mechanical and physical properties of Cu-Zr alloy. In this paper, the influence of boron on Cu-Zr alloys properties was studied on Cu-1Zr (wt.%) and Cu-1.1Zr-0.3B (wt.%) systems. Scanning electron microscopy, laser nanoparticle sizer, computed tomography and X-ray diffraction were employed for observation of changes in the microstructure during production steps. More specifically ? variations in size of the Cu particles, powder mixtures? structural parameters, and development of CuZr phase in binary alloy, CuZr phase and ZrB2 particles in ternary alloy were observed. It was shown that presence of boron increases dislocation density in ternary alloy over the mechanical alloying time compared to binary alloy. The results presented in this study show higher hardening effect in Cu-Zr-B alloy compared to Cu-Zr alloy, resulting in stable hardness values during thermomechanical treatment. Further, it can be seen that finely dispersed reinforcing ZrB2 particles in copper matrix does not have significant influence on its conductivity. Moreover, both systems Cu-Zr and Cu-Zr-B exhibit better electrical conductivity after thermomechanical treatment as a result of zirconium reduction in solid solution due to its precipitation.
Novel basalt-stainless steel composite materials with improved fracture toughness
Authors: Pavkov Vladimir , Bakic Gordana , Maksimovic Vesna , Cvijovic-Alagic Ivana , Bucevac Dusan , Matovic Branko
Published: March 2023

This paper presents the technological process for obtaining basalt-stainless steel composite materials and testing their physical and mechanical properties. The phases of the technological process consist of: milling, homogenization, pressing, and sintering to obtain composite materials with improved fracture toughness. Andesite basalt from the deposit site "Donje Jarinje", Serbia, was used as a matrix in the composites, while commercial austenitic stainless steel 316L in the amount of 0-30 wt.% was used as a reinforcement. Although the increase of 316L amount caused a continuous decrease in the relative density of sintered samples, the relative density of sample containing 30 wt.% of 316L was above 94%. The 316L grains, which possess a larger coefficient of thermal expansion than the basalt matrix, shrinking faster during cooling from sintering temperature resulting in the formation of compressive residual stress in the basalt matrix surrounding the spherical steel grains. The presence of this stress activated toughening mechanisms such as crack deflection and toughening due to compressive residual stress. The addition of 20 wt.% of reinforcing 316L particles increased the fracture toughness of basalt by more than 30%. The relative density of these samples was measured to be 97%, whereas macrohardness was found to be 6.2 GPa.
Characteristic energy and reduced mobility for Ne+ ions in CF4 gas
Authors: Nikitovic Zeljka , Raspopovic Zoran
Published: March 2023

A cross section set for scattering Ne+ ions in CF4 gas is assessed by using available experimental data for charge transfer cross sections. Calculated cross sections can be used to obtain transport parameters, specially characteristic energy and reduced mobilty for low and moderate reduced electric fields E/N (E-electric field strength; N-gas density) and accounting for the non-conservative collisions. These data are needed for modelling in numerous applications of technologically importance.
The crystal growth of NASICON phase from the lithium germanium phosphate glass
Authors: Matijasevic Srdjan , Topalovic Vladimir , Savic Veljko , Labus Nebojsa , Nikolic Jelena , Zildzovic Snezana , Grujic Snezana
Published: March 2023

The crystal growth rate of LiGe2(PO4)3 phase from lithium germanium-phosphate glass was studied. The glass have been homogenized using the previously established temperature-time conditions, which make it possible to remove volatile substances from the glass melt. The atomic absorption spectrophotometry (AAS) was used to determine the chemical content of the obtained glass and scanning electron microscope (SEM) were used to reveal the isothermal process of crystal growth. The crystal growth rates were determined experimentally and theoretically.
Oxide powder mixture with poly-vinyl alcohol (PVA) and added polyethylene glycol (PEG) as plasticizer
Authors: Labus Nebojsa , Krstic Jugoslav , Matijasevic Srdjan , Pavlovic Vladimir
Published: March 2023

Powder mixture consisted of ZnO, Mn2O3 (MnCO3) and Fe2O3 blended powders, was found laminating during compaction. Polyvinyl alcohol (PVA) and a combination of PVA with polyethylene glycol (PEG) added as a plasticizer, were introduced as polymer binders to improve the compaction of oxide mixtures. It has been done by forming a suspension of oxide mixture and varying the polymer solution concentration and composition. By evaporating the solvent, new materials were obtained, which consist of oxide particles bound via polymer. In such a manner obtained hybrid materials were characterized with attenuated total reflection Fourier transformed infrared (ATR-FTIR) spectroscopy, differential thermal analysis (DTA) and transmission electron microscopy (TEM). The oxide polymer material was compacted at 200 MPa and the expansion of this compact during heating was monitored in temperature range up to 550?C with dilatometer. It was found that PVA forms graft polymer with PEG and specific interaction with oxide particles surface was revealed.
Influence of raster angle on tensile properties of FDM additively manufactured plates made from carbon reinforced PET-G material
Authors: Elayeb Abdelnaser , Jankovic Milan , Dikic Stefan , Bekric Dragoljub , Balac Igor
Published: March 2023

Tensile properties of thin plate specimens made from short carbon fiber reinforced PET-G material are experimentally evaluated for various raster angles (printing directions). In additive manufacturing (AM), raster angle is recognized as one of the key printing parameters which strongly influences the strength and stiffness of the final part. The relatively high average value of ultimate tensile strength was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 52.2 MPa and 25.4 MPa, respectively. Similarly, noticeably higher average value of modulus of elasticity was obtained for specimens printed with the 0? raster angle, compared to the value obtained for specimens printed with the 90? raster angle - 4752 MPa and 1569 MPa, respectively. Scanning electron microscopy (SEM) was used for analysis of specimens? fracture surfaces. SEM images revealed considerable volume fraction of voids (porosity). ?he porosity, together with weak bonding between two adjacent rasters, could be one of key factors for poor tensile properties of samples printed with rasters perpendicular to direction of load application (90? raster angle).
Dilatometric and microstructural study of particle and functionally graded composites based on hydroxyapatite and crystalline bioglass
Authors: Drdlik Daniel , Drdlikova Katarina , Maca Karel
Published: March 2023

Hydroxyapatite (HA) and bioglass (BG) ceramics have become of prime importance in bone tissue engineering. Besides the appropriate composition, the microstructure of bone replacement plays a crucial role. In the present work, particle composites and functionally graded material (FGM) based on HA and BG prepared by electrophoretic deposition were thoroughly characterised in terms of the preparation method, sintering process, phase composition and microstructure. The sintering was monitored by high-temperature dilatometry in two directions, the sintering rates were calculated, and the overall sintering process was discussed. The SEM showed the continuous change in the microstructure of FGM with gradual interconnected porosity favourable for bio-applications. The fundamental fractographic analysis proved the crack development in FGM related to the sintering process, and the recommendations for the reduction of the crack development were given. The phase transformations during thermal treatment were analysed using X-ray diffraction analysis and deeply discussed.
Building exterior wall thermal energy saving model based on green energy-saving nanomaterials
Authors: Chi Mingshu , Yu Kecheng , Zhang Cong , Gao Yuan , Lu Junchen
Published: March 2023

In order to reduce building energy consumption and make wall insulation
materials meet fire protection requirements, the authors put forward a kind
of energy saving model of building exterior wall under green and energy
saving nanomaterials. Mainly using PBECA energy saving calculation
software. By setting up multi-component, multi-material method. The energy
consumption of building aggregate in light energy saving device modified by
nanomaterials is simulated and analyzed, and the energy consumption of
building agent area is compared. The energy saving effect of light energy
saving system modified by nanomaterial fly ash in prefabricated buildings
was verified. According to the calculation of PBECA energy-saving
calculation software, the annual energy consumption of the building
assembled by nanomaterials modified fly ash lightweight energy-saving units
is 5981 kWh, and the energy consumption per unit area is 35.01 kWh/m2. In
the 1980's, the annual energy consumption of household agents was 86237 kWh,
and the energy consumption per unit area was 50.42 kWh/m2. Through the
analysis of the calculation results, it is concluded that the energy saving
efficiency of replacing the light-saving wall with nanomaterials fly ash in
precast area A can reach 65% of the energy saving standard.
Reliability optimization design of intelligent mechanical structure for waste heat recovery
Authors: Feng Xinyu , Zhu Xijing , Li Xiangmeng
Published: March 2023

In order to solve the problems of high energy consumption and serious waste
of heat energy in the cooling of traditional oil cooler in hydraulic system,
the author proposed the reliability optimization design of intelligent
mechanical structure for waste heat recovery. The author has built a waste
heat recovery test platform for hydraulic system, the influence of
electrical load, oil flow rate and working medium flow rate on system
operation and energy characteristics is studied. The experimental results
show that: under the same working condition, compared with the oil cooler of
the same specification, the maximum thermal efficiency of the proposed
organic Rankine cycle waste heat recovery system is increased to 2.56%. The
expander pressure ratio and system thermal efficiency increase with the
increase of electric load and oil flow rate. With the increase of the flow
rate of the working medium, the superheat of the working medium at the inlet
of the expander decreases significantly, while the heat exchange of the
evaporator and the output power of the expander increase. Under the test
condition, the maximum heat exchange of evaporator is 4.18 kW, and the
maximum output power of expander is 356 W. The energy saving effect of waste
heat recovery system of hydraulic system is obtained, and the influence law
of operation parameters on system performance is obtained.
Prediction of structural mechanical properties of energy-saving materials for solar photovoltaic photo-thermal system based on deep learning
Authors: Xue Dijie , Hu Xiaowei , Xu Xinhua
Published: March 2023

In order to study the annual operating efficiency of solar
photovoltaic/photo-thermal collectors, this paper proposes a prediction of
structural mechanical properties of energy-saving materials for solar
photovoltaic photo-thermal systems based on deep learning. Based on the test
data of a solar photovoltaic module, the performance of photovoltaic
photo-thermal module is evaluated from the perspectives of the First law of
thermodynamics, the Second law of thermodynamics, power generation
efficiency and heat collection efficiency. The experimental results show
that the working temperature difference increases from 6.8 K to 45.3 K, the
normalized temperature difference increases from to, and the power
generation efficiency decreases from 0.105 to 0.095 by 0.010, the
percentage of change is 9.4%, the heat collection efficiency is reduced from
0.4534 to 0.2120 by 0.2414, and the reduction rate is 53%, compared with the
generation efficiency and heat collection efficiency, the efficiency changes
during the test period are relatively small. In conclusion for
photovoltaic/photo-thermal components, environmental parameters have a
greater impact on the heat collection efficiency.
Signal processing and thermal performance analysis of motor heat recovery system
Authors: Li Jinwen
Published: March 2023

In order to realize the condition monitoring of the motor ?anytime,
anywhere?, improve the detection accuracy and shorten the detection time,
the author proposes a fault signal processing and diagnosis system for the
motor heat recovery system based on the IoT. That is, based on the IoT
technology, a mobile terminal oriented motor remote monitoring and fault
diagnosis system, the sensing layer of the system collects real-time motor
operation status data, and the transmission layer realizes data
transmission, cloud storage and response to data requests from the
application layer, finally, at the mobile end, the motor running status and
diagnosis results are displayed through charts and text, so as to realize
remote monitoring and fault diagnosis of the motor. The experimental results
show that the accuracy of fault diagnosis test of GA-SVM in mobile terminal
is more than 90%, and the running time is less than 30 ms, and the running
time is very short. It proves that the mobile terminal uses the fault
detection method based on GA-SVM model with high accuracy and short
detection time, that is, the fault signal processing and diagnosis accuracy
of the motor heat recovery system of the IoT is high and the detection time
is short.
Friction heat energy recovery system based on hydraulic brake system by wire of heavy vehicle
Authors: Guo Baoquan , Hou Honghua
Published: March 2023

In order to reduce fuel consumption and environmental pollution, the author
proposes a friction heat recovery system based on the hydraulic brake by
wire system of heavy-duty vehicles, the system uses the heat energy
generated by friction generate electricity, and stores the electric energy
in the vehicle battery. This can provide power for the lighting equipment on
the vehicle. The experimental results show that after using the recovery
system, the braking energy consumption is reduced, and the fuel consumption
is 10% less than before, which fully demonstrates the effectiveness of the
recovery system for energy conservation, and proves that the heat energy
recovery system can effectively reduce fuel consumption and reduce
environmental pollution.
Enhancement technology of underground water flow field in coal mine to improve energy efficiency of heat pump system in geothermal energy development
Authors: Peng Wei , Chen Shuzhao , Lyu Kuan , Xiao Cangyan , Jyu Xingjun , Sun Yuting , Peng Wen
Published: March 2023

In order to solve the problem that the cold/heat released from the
underground pipe of coal mine into the soil layer is difficult to dissipate
in a short time, the technology of enhancing the underground flow field of
coal mine in geothermal energy development to improve the energy efficiency
of the heat pump system is proposed. In this paper, based on the ground
source heat pump project located in a coal mine, the energy efficiency
enhancement technology of the artificial flow field ground source heat pump
system is studied and tested. The test results show that when starting work
at about 8:00, due to the increase of heating load, the accumulation of
cooling capacity around the buried pipe increases gradually, and the return
water temperature at the ground source side decreases gradually. At 14:05,
the water was pumped for the operation of the artificial groundwater flow
field. It can be seen that the temperature of the return water at the ground
source side began to rise gradually, indicating that the accumulation of
cold water around the buried pipe was relieved to a certain extent. In
conclusion, the artificial groundwater flow field can alleviate the
accumulation of cold water around the buried pipe heat exchanger to a
certain extent, improve the return water temperature of the buried pipe heat
exchanger, and improve the energy efficiency of the ground source heat pump
system.
Application of thermal energy storage technology in power grid topology
Authors: Bao Xunge , Cai Qing , Zhang Ji , Shang Tianting
Published: March 2023

In order to solve the problem of grid topology optimization, the author
proposes the application of renewable energy and energy storage technology
in the grid topology. The author first defines the grid graph data model,
then designs a grid topology analysis framework, and finally realizes
several grid topology analysis applications on this basis. The experimental
results show that graph database can better support the concurrent analysis
of large-scale users, and the average time required for analysis is
significantly less and the advantages are greater. When the number of users
reached 200, it took 0.07 seconds for graph database and 0.13 seconds for
relational database. In conclusion, the power grid topology analysis method
based on renewable energy and energy storage technology can greatly improve
the performance and meet the needs of practical scheduling.
Heat management system of electric vehicle based on heat pump and energy recovery of removable battery
Authors: Xue Yuanfei , Diao Xudong , Li Xin
Published: March 2023

In order to manage the air-conditioning thermal system, battery thermal
system and motor thermal system in a unified manner, the author proposes a
self-developed integrated thermal management system for electric vehicles
to recover battery energy. Firstly, the problems in the development of
electric vehicles and the importance of thermal management system are
introduced, secondly, the self-developed thermal management system scheme
and the principle of each part are analyzed, the experimental results of
thermal system in enthalpy difference chamber are also introduced. The
experimental results show that: Under the double evaporation system, when
the compressor speed is 4500 rpm, the maximum COP is 2.46, and the maximum
COP charge is 1180 g, the maximum heat transfer capacity is 4819 W (wind
side heat transfer + water side heat transfer), the evaporation temperature
is 5.35?C, the evaporation superheat is 9.5?C, the condensation temperature
is 59.3?C, the undercooling degree is 10.4?C, the suction pressure is 280
kPa, and the exhaust pressure is 1694 kPa. In conclusion, the thermal
management system has great energy saving effect, which ensures that the
electric vehicle range will not be greatly attenuated under winter heating
conditions, and meets the requirements of comfort.
Calculation and evaluation of building thermal energy consumption and carbon emissions based on BIM technology
Authors: Chen Feifei , Yang Yang , Li Jing , Tian Aruomeng
Published: March 2023

In order to calculate the carbon emissions in the construction process to
achieve low-carbon buildings and low-carbon construction, the author puts
forward the calculation and evaluation of building thermal energy
consumption and carbon emissions based on building information modeling
(BIM) technology. The author first proposed the important value and
application of BIM technology in energy consumption evaluation of green
buildings, taking a gymnasium as an example, a carbon emission accounting
system for building construction and installation process is established
based on BIM technology, and the carbon emissions in building construction
and installation process are calculated and analyzed. The results show that
the carbon emission during the construction and installation of a gymnasium
is 766300 tons, of which the carbon emission caused by building materials is
737200 tons, the carbon emission caused by mechanical equipment is 4500
tons, and that caused by office and living is 34500 tons, accounting for
94.90%, 0.59%, and 4.51%, respectively. In conclusion through data analysis,
determine the largest carbon emission source in the construction process,
and then propose targeted carbon emission reduction measures in the
construction process of the construction industry.
Artificial intelligence control system of heat recovery in thermal power plant
Authors: Qi Huijuan , Wen Hongnian , Xu Aixue
Published: March 2023

In order to improve the comprehensive utilization rate of energy in power
plants, the author puts forward the research of artificial intelligence
control system for heat and power plant waste heat recovery. In the heating
system of waste heat recovery, intelligent time-sharing and zoning control
is set according to user needs, which enables the heating system to adjust
the temperature of heating water outlet in real time according to the
dynamic change of outdoor climate, in the heating system of waste heat
recovery, intelligent time-sharing and zoning control is set according to
user needs, which enables the heating system to adjust the temperature of
heating water outlet in real time according to the dynamic change of outdoor
climate. The results show that the energy saving rate of time-sharing
heating increases with the increase of outdoor temperature, when the
outdoor temperature is 8?C, the energy saving rate is 0.35, in addition, the
energy saving rate of the heating system is not only related to the outdoor
temperature, but also to the length of the intermittent period, it is
obvious that the longer the intermittent period is, the higher the energy
saving rate is. In conclusion, the application of time division temperature
control technology in the heating system greatly improves the energy saving
effect of buildings, saves energy, and has extremely high economic,
environ?mental and social benefits, which is worth advocating and promoting.
Energy saving optimization of thermal power co-generation automation system in power plant
Authors: Zhang Haiying
Published: March 2023

In order to establish a new optimal load distribution between CHP units and
wind turbines and realize a new type of energy-saving dispatching, the
authors proposed a dispatching system based on smart grid. The author
proposed that the heat pump with electric drive air conditioning should
share part of the heating load of the hot water radiator, accordingly, the
supply of heating water is reduced, increase heating power load. This
directly leads to the increase of the total power load in the grid and the
decrease of the total heating and hot water load, changing the proportion of
thermal power load. Based on the new heating water and power load
constraints, a mathematical model of optimal scheduling is established, the
energy-saving dispatching of cogeneration units and wind turbines is
realized. The simulation results show that using the new energy-saving
scheduling method, 342.4 MWh of fuel can be saved per hour, and the energy
saving benefit is about 8.83%. If the calorific value of standard coal is
29271 kJ/kg, this means that the fuel consumption savings per hour is about
42.14 ton standard coal. The calculation results show that the higher the
value is, the more economically feasible the feed-in price of wind power is.
In conclusion based on the current electricity price and heating heat price,
in order to ensure that the economic benefits of each participant are not
changed, the feed-in price of wind power is discussed, and the economic
feasibility of the method is proved.
Development of a new silicate thermal insulation coating and analysis of heat storage characteristics
Authors: Wei Chenghui , Chen Hao , Wu Bin
Published: March 2023

Non-shrinkage composite silicate insulation materials with raw materials easy
to obtain, low cost, low density, high insulation, special-shaped equipment
it is a new type of thermal insulation material with advantages of
convenient daub, no dust on site and almost zero shrinkage in the drying
process. Through the analysis of the raw materials and the production
process of the thermal insulation coating, a production method of the
thermal insulation coating with low raw material cost, easy to use, simple
production process and good product performance was determined. The
experimental results show that a layer of waterproof coating with
appropriate color can be brushed on the surface of the coating, which can
prolong the service life of the coating and beautify the environment. From
the use of this coating on the tower of Shenghua Refinery, the tower with a
surface temperature of 150?C is coated with 22 mm thick thermal insulation
coating, and the surface temperature of the coating is 35 ?C. Due to the use
of the insulation coating, the heat consumption is reduced, and the
production efficiency and economic benefits are greatly improved.
Increasing Use of Diabetes Devices: What Do Health Care Professionals Need?
Authors: Messer Laurel H. , Vigers Tim , Akturk Halis K. , Forlenza Gregory P. , Huss Kelsey B. , Karami Angela J. , Malecha Emily , Oser Sean M. , Polsky Sarit , Pyle Laura , Shah Viral N. , Wadwa R. Paul , Oser Tamara K.
Published: March 2023

Despite evidence of improved diabetes outcomes with diabetes technology such as continuous glucose monitoring (CGM) systems, insulin pumps, and hybrid closed-loop (HCL) insulin delivery systems, these devices are underutilized in clinical practice for the management of insulin-requiring diabetes. This low uptake may be the result of health care providers’ (HCPs’) lack of confidence or time to prescribe and manage devices for people with diabetes. We administered a survey to HCPs in primary care, pediatric endocrinology, and adult endocrinology practices in the United States. Responding HCPs expressed a need for device-related insurance coverage tools and online data platforms with integration to electronic health record systems to improve diabetes technology uptake in these practice settings across the United States.
Novel Once-Weekly Basal Insulin Fc Achieved Similar Glycemic Control With a Safety Profile Comparable to Insulin Degludec in Patients With Type 1 Diabetes
Authors: Kazda Christof M. , Bue-Valleskey Juliana M. , Chien Jenny , Zhang Qianyi , Chigutsa Emmanuel , Landschulz William , Wullenweber Paula , Haupt Axel , Dahl Dominik
Published: March 2023

OBJECTIVE

Basal Insulin Fc (BIF; insulin efsitora alfa; LY3209590), a fusion protein combining a novel single-chain insulin variant with a human IgG Fc domain, is designed for once-weekly basal insulin administration. This phase 2 study assessed safety and efficacy of BIF versus degludec in 265 patients with type 1 diabetes (T1D) using multiple daily injections.

RESEARCH DESIGN AND METHODS

During this randomized, parallel, open-label study, patients with T1D were randomized (1:1) to receive BIF once weekly or degludec once daily over the 26-week treatment period. Both groups were titrated to a fasting glucose level of 80–100 mg/dL. The primary end point was HbA1c change from baseline to week 26 (noninferiority margin, 0.4%). Secondary end points included percent time in range (TIR) (70–180 mg/dL), continuous glucose monitoring (CGM) fasting glucose (FG) level, and rate of hypoglycemia.

RESULTS

After 26 weeks, patients receiving BIF had noninferior HbA1c change from baseline versus those receiving degludec, with a statistically significant treatment difference of 0.17% (90% CI 0.01, 0.32; P = 0.07) favoring the comparator. Percent TIR was similar for patients in the BIF (56.1%) and degludec (58.9%; P = 0.112) groups at week 26. FG values were significantly higher for patients receiving BIF (158.8 mg/dL) versus degludec (143.2 mg/dL; P = 0.003). Rates of CGM-derived hypoglycemia were not statistically significantly different for BIF and degludec over 24 h for level 1 (P = 0.960) or level 2 (P = 0.517) hypoglycemia during the treatment period. Occurrence of serious adverse events was similar between the BIF and degludec groups.

CONCLUSIONS

Once-weekly BIF demonstrated noninferior glycemic control to once-daily degludec (treatment difference: 0.17% favoring degludec) and no difference in hypoglycemia or other safety findings in patients with T1D.
Experimental evaluation of the metal powder particle flow on the melt pool during directed energy deposition
Authors: Baere Dieter De , Hinderdael Michaël , Jardon Zoé , Sanchez-Medina Jorge , Helsen Jan , Powell John
Published: March 2023

The experimental evaluation of melt surface flow in blown laser cladding and additive manufacturing usually employs tracer particles added to the powder feed. This paper presents details of a high-speed imaging (HSI) and image processing technique, which can directly monitor the flow of standard (nontracer) particles on the surface of the melt. This technique should improve the accuracy of flow observations as no foreign bodies are added to the melt. To verify the technique, 316 Stainless steel powder was laser clad onto a substrate of the same material, and an HSI frame rate of 40 000 frames/s was employed with a specific illumination system. The images were subsequently image processed and the trajectories of the powder feed particles on the melt surface are analyzed and discussed here. As would be expected in this case, the observed melt surface flow was in agreement with what would be expected of a melt with a negative surface tension gradient as a function of temperature.
Histologic evaluation of activity and chronicity of lupus nephritis and its clinical significance
Authors: Choi Sung-Eun , Fogo Agnes B. , Lim Beom Jin
Published: March 2023

The National Institutes of Health (NIH) lupus nephritis activity and chronicity indices, which comprise six activity scores and four chronicity scores, have a long development history. The 2018 revised International Society of Nephrology/Renal Pathology Society (ISN/RPS) classification for lupus nephritis adopted the most recent NIH indices to replace subclasses A, C, and A/C. Although an evidence-based approach should further evaluate the clinical significance of the modified NIH indices, recent validation studies demonstrated that the modified chronicity indices have a strong correlation with kidney outcome of lupus nephritis.
Estudio sobre ciberpatologías en estudiantes universitarios: antes y después de la covid-19
Authors: Clara Zafra Miguel Ángel , Sainz Barajas Ma Teresa de la Luz , Chiñas Valencia Juan José , Aguirre Alemán María Guadalupe
Published: March 2023

El uso excesivo de las nuevas tecnologías por los jóvenes universitarios ha ocasionado problemas de salud que potencializan afectaciones biológicas, psicológicas y sociales. Aquí se realiza un análisis comparativo sobre el nivel de afectación antes y después de la pandemia de la covid-19 por el uso excesivo de tecnologías (ciberpatologías) en estudiantes universitarios de la Facultad de Contaduría y Administración de la Universidad Veracruzana campus Coatzacoalcos. Para la recolección de datos, se elaboró una encuesta aplicada a través de Google Forms. Con la información recolectada, se utilizaron técnicas descriptivas con el objetivo de comparar las muestras a partir de la hipótesis de estudio. Los resultados muestran evidencia empírica sobre que los estudiantes son proclives a padecer ciberpatologías. Esto demuestra la necesidad de indagar de manera explicativa los factores que las ocasionan. Las afectaciones demostradas implican la necesidad de generar políticas públicas educativas que busquen atender este problema en las universidades.
Kritische Diskursfähigkeit im Fremdsprachenunterricht Ein Beitrag zur Ausdifferenzierung eines Leitkonzepts schulischer Bildung
Authors: Marxl Anika , Römhild Ricardo
Published: March 2023

With their definition of the ability to participate in discourses, the German educational standards open venues for a primarily functional understanding of this superordinate goal of language education. However, such a notion of discourse literacies may be seen as anachronistic since discourses are always related to questions of power and values. Consequently, learners need to develop critical discourse literacy in addition to functional communicative skills. This article seeks to identify the critical components of the ability to participate in discourses and suggests a two-fold concept of critical discourse literacies. Against the background of a discussion of existing approaches to discourse literacies in language education, this contribution argues for both the development of an awareness of discursive structures and the consideration of human rights as a value base for critical (self)reflection when it comes to preparing learners for participation in global discourses.
Development and Validation of the German Version of the Community of Inquiry Survey
Authors: Norz Lisa-Maria , Hackl Werner O. , Benning Nils , Knaup-Gregori Petra , Ammenwerth Elske
Published: March 2023

The Community of Inquiry (CoI) Framework describes success factors for collaborative online-based learning. The CoI Survey is a validated instrument to measure these factors from the perspective of course participants. Until now, no validated translation of this Survey to German was available. The aim of this work was to translate the original English Survey to German and to validate the translated Survey instrument. After a systematic translation process, we validated the German translation in two higher education settings in two countries (entire data set of n=433 Surveys). By conducting item analysis, reliability analysis, exploratory factor analysis, and confirmatory factor analysis, we were able to confirm the reliability and validity of the German CoI Survey. Only one item (CP6) shows cross-loadings on two factors, a finding that was already discussed for the original CoI Survey. To conclude, the validated German version of the CoI Survey is now available.
Features of High-Quality Online Courses in Higher Education: A Scoping Review
Authors: Wright Alysia Christine , Carley Timothy Cameron , Alarakyia-Jivani Raisa , Nizamuddin Sameer
Published: March 2023

What are the features of high-quality online courses in higher education? In this scoping review, we explore peer-reviewed scholarship related to the features of online learning in postsecondary contexts. We searched ERIC (EBSCO), Education Research Complete, and SocINDEX with Fulltext to retrieve peer-reviewed literature from 2010-2022 pertaining to features of online learning in higher education. Two reviewers independently conducted the initial title and abstract screening (n = 1,574), full text review (n = 483), and data extraction of the included articles (n = 38). Using thematic content analysis to explore the data extracted from each article, we found that the literature predominately included scholarship related to quality online course design, instructor facilitation in online courses, quality assessment of online courses, and student engagement in online courses. The breadth of these themes included a multiplicity of strategies and approaches to consider when designing online learning experiences. We recommend that administrators, faculty members, and instructors responsible for designing online courses and programs for postsecondary contexts continue to incorporate these considerations to promote high-quality and consistent online offerings. We conclude the review by presenting four high-level considerations to guide these discussions.
As crianças e suas performances na produção de narrativas orais na pré-escola
Authors: Tebaldi Lisiane Rossatto , Carvalho Rodrigo Saballa de
Published: March 2023

O artigo decorre de uma pesquisa no campo dos Estudos Sociais da Infância, em interface com as contribuições de investigações sobre performances narrativas. O objetivo da pesquisa foi investigar os modos como crianças pré-escolares, a partir de processos de mediação promotores de ação colaborativa, produzem performances narrativas. Metodologicamente, foi realizada uma pesquisa etnográfico-propositiva com um grupo de sete crianças de 5 anos de idade que frequentavam a pré-escola. Foram propostos 20 ateliês narrativos, no intuito de evidenciar as múltiplas linguagens das crianças durante a produção de suas narrativas. Os ateliês foram organizados em três etapas, nomeadas como: 1) experimentação; 2) exploração; 3) produção de narrativas orais. As propostas desenvolvidas envolveram contação de histórias, rodas de conversa, leitura de imagens e produção de narrativas orais. Os resultados da pesquisa demonstraram o processo criativo das crianças na produção de narrativas, bem como sua expressão corporal e vocal por meio de performances. Com as análises, foi possível inferir a relevância da oferta de contextos promotores de narrativas, assim como o papel fundamental da mediação docente no desenvolvimento das competências linguísticas orais das crianças. Dessa forma, defende-se que as crianças tenham tempos, espaços e possibilidades de expressar, com suas narrativas, as experiências vivenciadas na pré-escola.
Conclusão de curso no ensino superior: um olhar sobre ingressantes das camadas populares na Universidade Federal da Fronteira Sul
Authors: Nierotka Rosileia Lucia , Catalano de Bonamino Alicia Maria
Published: March 2023

O objetivo deste trabalho é analisar os efeitos de características socioeconômicas e raciais de estudantes e de aspectos institucionais na conclusão de curso superior, na Universidade Federal da Fronteira Sul (UFFS). Essa temática se insere no debate sobre desigualdade de oportunidades no ensino superior, considerando as políticas recentes de maior inclusão social, como a Lei nº 12.711/2012 (Lei de Cotas). Assim, foi estudada uma coorte de ingressantes na UFFS e características relacionadas à conclusão de curso com base em dados quantitativos obtidos na UFFS e no Inep (Enem e Censo da Educação Superior), e por meio de análise descritiva e multivariada. Os principais achados mostraram que: homens, especialmente negros, apresentaram menores chances de conclusão em relação às mulheres brancas; estudantes da área rural apresentam mais chances de conclusão de curso em relação aos da área urbana; e políticas de apoio social e atividades extracurriculares possuem efeitos positivos na conclusão dos cursos. O desempenho na nota de redação do Enem também se mostrou um fator relevante na conclusão do curso. O estudo destaca a importância das ações afirmativas para o acesso das camadas populares ao ensino superior público e das políticas de permanência na conclusão do curso.
Formação e envolvimento docente no ensino superior brasileiro em Saúde: fragilidades e fortalezas
Authors: Quintanilha Luiz Fernando , Pereira Mariana Araújo , Bezerril Andrade Bruno , Labatut Portilho Evelise Maria
Published: March 2023

A pandemia escancarou a necessidade de discutirmos com profundidade a qualidade da formação em Saúde no País, destacando-se o papel central do professor nesse processo. Nesse âmbito, o objetivo deste artigo foi investigar a formação e a atividade docentes no ensino superior em Saúde, considerando perfil, engajamento e principais percepções profissionais. Trata-se de um estudo transversal, quantitativo, de abordagem descritiva e analítica, que investigou a capacitação didático-pedagógica e as percepções da atividade docente de 223 professores do ensino superior em Saúde de todo o Brasil. Entre eles, a maioria considera sua função docente como principal (71,30%), afirma conhecer as Diretrizes Curriculares Nacionais dos seus respectivos cursos de atuação (91,48%) e relata familiaridade com os elementos relacionados ao corpo docente presentes nos documentos de avaliação de curso e institucionais (83,41%). Embora declarem, notadamente os profissionais da rede privada (89,8% versus 73,08% da rede pública, p<0.001), que suas instituições possuem adequada infraestrutura, há um relativo descontentamento no tocante à remuneração, especialmente entre profissionais com formação original em Medicina (59,57% versus 34,88% em outras formações, p=0.001). No contexto de virtualização do trabalho docente, 85,20% afirmam utilizar ferramentas tecnológicas e 69,06% se sentem aptos para atuar no ensino remoto, bem como 58,74% o consideram eficaz. Este estudo lança luz sobre um tema ainda pouco explorado no País, mas que representa grande impacto na qualidade da formação de profissionais de saúde brasileiros.
FAMILY RITUALS AND PROBLEMATIC SMARTPHONE USE IN ADOLESCENTS
Authors: Maulida Isni Sania , Anindhita Vidya , Abidin Fitri Ariyanti
Published: March 2023

Family factors have been identified as potential protective or risk factors for problematic smartphone use in adolescents, yet studies on family rituals as one of the important family factors are scarce. Therefore, this study investigates the relationship between family rituals and problematic smartphone use in adolescents. Family rituals were measured using the Family Ritual Questionnaire (FRQ), and problematic smartphone use was measured using the Mobile Phone Problematic Use Scale (MPPUS). Both measurements were validated in the Indonesian version. Using a cross-sectional approach, we applied a convenience sampling method. Two hundred and twelve adolescents aged 12-18 (girls= 113, boys= 98; Mean age= 14.56, SD= 1.41) participated in this study. The data was analyzed using Spearman’s rho correlation analysis. The results show no significant correlation between family rituals and problematic smartphone use in adolescents (r = 0.01; p > 0.05). Further investigation involving family communication as a mediating variable is strongly recommended.
PROBLEMATIC SMARTPHONE USE IN ADOLESCENTS: PARENTAL STRUCTURE AND PARENTAL PSYCHOLOGICAL CONTROL AS PREDICTORS
Authors: Lathiifah Dwi Astrifiani , Qodariah Laila , Abidin Fitri Ariyanti
Published: March 2023

The use of smartphones in adolescents can negatively impact their daily lives. When adolescents’ ability to control smartphone use is low, they could experience problematic smartphone use behavior (PSU). By internalizing control, parents play a crucial role in enhancing adolescents' self-control on smartphone use. Based on the controlling component of parenting, there are two types of parental control: parental structure and parental psychological control. Previous studies have found a relationship between parental psychological control and PSU. However, studies investigating the relationship between parental structure and parental psychological control simultaneously with PSU are limited. This study is important since parents found practicing those two types of parental control simultaneously. Therefore, this study aimed to investigate the effect of parental structure and psychological control on adolescents' problematic smartphone use. 219 adolescents aged 12-18 (M = 14.49 years) completed the Indonesian version of the Parental Structure Scale, Parental Psychological Control Scale, and Mobile Phone Problematic Use Scale questionnaires. Stepwise regression analysis shows that only parental psychological control predicts the increase of problematic smartphone use in adolescents. Our finding suggested that the type of parental control that emphasizes authority assertion, love withdrawal, and guilt induction is ineffective in decreasing problematic smartphone use in adolescents.
KEPUASAN AKSEPTOR TERHADAP PELAYANAN PEMASANGAN KONTRASEPSI IMPLAN DI PROVINSI BANTEN PASCA PANDEMI COVID-19
Authors: Oktriyanto Oktriyanto , Amrullah Hilma , Wulandari Yenie
Published: March 2023

Provinsi Banten merupakan salah satu provinsi di Indonesia yang sangat terdampak oleh pandemi Covid-19. Dampak tersebut diantaranya adalah pelayanan program keluarga berencana pada masyarakat. Penelitian ini bertujuan untuk mengetahui tingkat kepuasan akseptor terhadap pelayanan pemasangan kontrasepsi implan di Provinsi Banten pasca pandemi Covid-19. Desain penelitian menggunakan cross-sectional study. Pengumpulan data dilaksanakan pada bulan Mei Tahun 2022 di Kota Cilegon dan Kota Serang, Provinsi Banten, dengan mempertimbangkan banyaknya jumlah calon akseptor kontrasepsi implan yang akan dilayani pada waktu pelaksanaan penelitian. Data diperoleh melalui wawancara menggunakan kuesioner terstruktur. Analisis data menggunakan analisis statistik deskriptif dan customer satisfaction index (CSI). Hasil Penelitian menunjukan bahwa 7 dari 10 responden sudah merasa puas terhadap pelayanan pemasangan kontrasepsi implan di Provinsi Banten. CSI dari dimensi keandalan paling rendah dibandingkan dimensi lainnya, disebabkan variabel tentang petugas keluarga berencana (PLKB/Kader KB) dan pemberi layanan (dokter/bidan) dianggap belum maksimal dalam memberikan penjelasan terkait keuntungan dan kerugian (efek samping) penggunaan kontrasepsi implan sebelum pelayanan. Berdasarkan temuan tersebut, petugas keluarga berencana maupun pemberi layanan perlu memberikan komunikasi, informasi dan edukasi secara menyeluruh pada akseptor sebelum pelayanan pemasangan kontrasepsi implan.
IMPACT OF PANDEMIC COVID-19 ON CONSUMER PURCHASE INTENTION: EMPIRICAL STUDY FROM INDONESIA
Authors: Sakapurnama Eko , Safitri Nurul
Published: March 2023

The Covid-19 pandemic has caused an economic recession in many countries around the world. The economy has contracted with reduced customer demand due to the policy of large-scale social applications in Indonesia.  This study aims to analyze consumer preferences from the demand-side side of several industrial sectors affected by the pandemic so that business players can develop strategies during the pandemic and post-Covid-19. The research was carried out on September 14-30, 2020, through an online survey of 722 respondents who live in the Jakarta, Bogor, Depok, Tangerang, and Bekasi areas. The results showed that in addition to basic needs, which occupy the first preference, consumers prefer to withhold their consumption of other commodity goods. According to the study findings, the transportation and tourism industry sectors are the weakest. The vehicle purchase subsector during the pandemic is also the lowest. Therefore, innovative policies are needed for businessmen or government policies to stimulate the automotive industry.
Análisis de la imagen y proyección del enoturismo español en Francia a través de la traducción de páginas web comerciales e institucionales
Authors: Moreno Paz María del Carmen
Published: March 2023

Este trabajo tiene como objetivo examinar el potencial del enoturismo en Francia, principal país importador de vino español y uno de los focos de procedencia más importantes de turismo en España. Para ello, se ha analizado la proyección del enoturismo español en Francia a través de la búsqueda de páginas web comerciales e institucionales de España. Se ha tenido en cuenta no solo la visibilidad y posicionamiento, sino sobre todo el acceso a contenido traducido al francés. Asimismo, se han observado las estrategias de promoción del enoturismo y la adecuación de las traducciones. Sin embargo, los resultados muestran que se requiere aún una mayor concienciación sobre la importancia de la traducción para poder aprovechar el potencial del enoturismo en otros países y, en concreto, en Francia.