bluuebunny/crossref_metadata_2025 huggingface dataset:
The energetics and evolution of oxidoreductases in deep time
Authors: Nanda Vikas , McGuinness Kenneth N. , Fehon Nolan , Feehan Ryan , Miller Michelle , Mutter Andrew , Nam Justin , AbuSalim Jenna E. , Atkinson Joshua T. , Heidari Hirbod , Losada Natalie , Kim J. Dongun , Koder Ronald L. , Lu Yi , Silberg Joff , Slusky Joanna , Falkowski Paul
Published: May 2023

The core metabolic reactions of life drive electrons through a class of
redox protein enzymes, the oxidoreductases. The energetics of electron
flow is determined by the redox potentials of organic and inorganic
cofactors as tuned by the protein environment. Understanding how protein
structure affects oxidation-reduction energetics is crucial for studying
metabolism, creating bioelectronic systems, and tracing the history of
biological energy utilization on Earth. We constructed ProtReDox
([https://protein-redox-potential.web.app](https://protein-redox-potential.web.app)),
a manually curated database of experimentally determined redox
potentials. With over 500 measurements, we can begin to identify how
proteins modulate oxidation-reduction energetics across the tree of
life. By mapping redox potentials onto networks of oxidoreductase fold
evolution, we can infer the evolution of electron transfer energetics
over deep-time. ProtReDox is designed to include user-contributed
submissions with the intention of making it a valuable resource for
researchers in this field.
Structural Insights into Mouse Beta3 Adrenergic Receptor: A Homology Modeling Study
Authors: Abraham Asha , Gangadhara Vijayalakshmi
Published: May 2023

Background: The β3 adrenergic receptor (AR) plays a crucial
role in regulating lipolysis and thermogenesis in visceral adipose
tissue and is an important drug development target for obesity and
diabetes. However, there is no structural information available for the
mouse β3 AR, and its selectivity mechanism is poorly understood.
Objective: To address this, the study aimed to construct and
validate a 3D homology model of the mouse β3 AR using computational
methods and multiple software tools. Methods: we constructed
and validated a 3D homology model of the mouse β3 AR using the β3 ADR
amino acid sequence of Mus musculus from NCBI and identified possible
templates using protein BLAST. We characterized the protein and aligned
the sequence with Clustal Omega to identify conserved regions. The
homology model was constructed using three different software/servers:
SWISS Model, Phyre2.0, and iTASSER, and validated using various
techniques. Results: The β3 AR model comprises 400 amino acid
residues, exhibits a theoretical pI of 9.57, instability index of 0.57,
aliphatic index of 98.35, and GRAVY value of 0.289. Phyre2.0 constructed
the most accurate β3 AR model using c2rh1A as a template, with an ERRAT
score of 84.076. The Ramachandran plot revealed 93.2% of residues in
the favored regions. Conclusion: The study highlights the
significance of homology modeling as a computational method for
predicting protein 3D structure and emphasizes the importance of
comparing and evaluating models generated from multiple templates and
software tools. The β3 AR model generated in this study may facilitate
future research on the structure and function of the β3 AR, potentially
leading to the development of more effective drugs for obesity and
diabetes.
Efficacy and Safety of Oral Pentoxifylline in the Treatment and Recovery of Patients with Moderate to Severe COVID-19 Infection Treated with Routine Protocols: A Randomized Controlled Clinical Trial
Authors: Seirafianpour Farnoosh , Almasi Simin , Sadeghi Sara , Valizadeh Rohollah , Riahi Taghi , Yassin Zeynab , Javadi Shiva , Ranjbar M. , Makiani Mahin , Goudarzi Manizheh , Hosseini-Baharanchi Fatemeh Sadat , Goodarzi Azadeh
Published: May 2023

Backgrounds: The absence of a gold-standard treatment for
COVID-19 infection encourages clinicians to benefit from multipotential
medications in the treatment of COVID-19. The current controlled
randomized clinical trial tried to evaluate the efficacy and safety of
pentoxifylline (PTX) as an adjuvant therapy in moderate to severe
COVID-19 infection. Methods: In this randomized controlled
clinical trial, two groups of hospitalized patients with moderate to
severe COVID-19 infection were randomized by the block randomization
method to either receive standard protocol therapy or standard protocol
therapy plus pentoxifylline 400 mg TDS for 14 days. Results: The
results showed a greater improvement in the proinflammatory biomarkers
in the intervention group. Oxygen saturation, hemoglobin, and platelet
levels were also improved to a higher level among pentoxifylline
recipients. The mortality rate was reported 4% and 32% in the
intervention and control groups, respectively. One out 13 patients with
severe COVID-19 infection expired in the intervention group, while 20
out of 28 patients expired in the control group, showing about 10 times
higher mortality rate compared to the pentoxifylline recipients.
Conclusion: Pentoxifylline increased the survival rate of
COVID-19 patients and played as a preventive role for COVID-related
mortality and morbidity such as acute respiratory distress syndrome.
The photothermal conversion and UV resistance of silk fabrics being achieved through surface modification with C@SiO 2 nanoparticles
Authors: Deng Gang , Yao Lu , Yang Yuanyuan , Lu Song , Wu Guohua
Published: May 2023

With the improvement in people’s living standards, the development and
application of smart textiles are receiving increased attention. In this
study, a carbon nanosurface was successfully coated with a SiO
layer to form C@SiO nanomaterials,
which improved the dispersion of carbon nanomaterials in aqueous
solution and enhanced the absorption of light by the carbon
nanoparticles. C@SiO nanoparticles were coupled on the
surface of silk fabric with a silane coupling agent KH570 to form C@SiO
nanosilk fabric. The silk fabric that had undergone
such surface modification was endowed with a special photothermal
function. The results obtained with scanning electron microscopy (SEM),
energy dispersive spectrometer (EDS), and infrared spectroscopy (FTIR)
showed that C@SiO nanoparticles were successfully
modified on the surface of the silk fabric. In addition, under the
irradiation of near-infrared light with a power of 20 W and a wavelength
of 808 nm, the C@SiO nanosilk fabric was rapidly
warmed from 23 °C to 60 °C within 30 s. After subjecting the functional
fabric to hundreds of photothermal experiments and multiple washes, the
photothermal efficiency remained largely unchanged and proved to be
durable and stable. In addition, the thermogravimetric (TG) analysis
results showed that the C@SiO nanoparticles
contributed to the thermal stability of the silk fabric. The UV
transmittance results indicated that C@SiO nanofabric
is UV-resistant. The silk modification method developed in this study is
low-cost, efficient, and environmentally friendly. It has some prospects
for future applications in the textile industry.
What is the future of artificial intelligence in obstetrics? A qualitative study among healthcare professionals
Authors: Fischer A. M. , Rietveld Anna , Teunissen P. W. , Hoogendoorn M. , Bakker Petra
Published: May 2023

Objective This work explores the perceptions of obstetric clinicians
about Artificial Intelligence (AI) in order to bridge the gap in uptake
of AI between research and medical practice. Identifying potential areas
where AI can contribute to clinical practice, enables AI research to
align with the needs of clinicians and ultimately patients. Design
Qualitative interview study. Setting A national study conducted in the
Netherlands. Sample Dutch clinicians working in obstetrics with varying
relevant work experience, gender, and age. Methods Thematic analysis of
qualitative interview transcripts. Results Thirteen gynaecologists were
interviewed about hypothetical scenarios of an implemented AI model.
Thematic analysis identified two major themes: perceived usefulness and
trust. Usefulness involved AI extending human brain capacity in complex
pattern recognition and information processing, reducing contextual
influence, and saving time. Trust required validation, explainability
and successful personal experience. This result shows two paradoxes:
firstly, AI is expected to provide added value by surpassing human
capabilities, yet also a need to understand the parameters and their
influence on predictions for trust and adoption was expressed. Secondly,
participants recognised the value of incorporating numerous parameters
into a model, but they also believed that certain contextual factors
should only be considered by humans, as it would be undesirable for AI
models to utilize that information. Conclusions Obstetricians’ opinions
on the potential value of AI highlight the need for clinician-AI
researcher collaboration. Trust can be built through conventional means
like RCTs and guidelines. Holistic impact metrics, such as changes in
workflow, not just clinical outcomes, should guide AI model development.
Further research is needed for evaluating evolving AI systems beyond
traditional validation methods.
Riemann boundary value problems on the Archimedean spiral
Authors: Fan Shaohua , Liu Hua , Nie Zhihui
Published: May 2023

This paper studies the Riemann boundary value problems on the
Archimedean spiral. We characterized the functions which are intergrable
on the Archimedean spiral. We also study the asymptotic behaviors of
Cauchy-type integral and Cauchy principal value integral on Archimedean
spiral at the origin and infinity. At the end, we discuss the Riemann
boundary value problems for sectionally holomorphic functions with the
Archimedean spiral as their jump curve and obtain the explicit form.
Short-term load and spinning reserve prediction based on LSTM and ANFIS with PSO algorithm
Authors: Ferdosian Mohammad , Abdi Hamdi , Karimi Shahram , Kharrati Saeed
Published: May 2023

In this paper, Short-term predicting of load and spinning reserve is
first performed using a combination of ANFIS and meta-heuristic
algorithms including Differential Evolution (DE), Genetic Algorithm (GA)
and Particle Swarm Optimization (PSO). The ANFIS-PSO combination is
selected as the best ANFIS combination in load and spinning reserve
prediction with a lower error criterion than other methods. As a DL
method, LSTM network can provide good accuracy for load and spinning
reserve forecasting. In the optimal ANFIS-PSO method, the average error
value is low, but the error variance is high, on the contrary, in the
LSTM method, the average error value is high, and the error variance is
low. Therefore, we use the combination of ANFIS-PSO and LSTM to reduce
the average error and error variance to an acceptable level. The
weighted average method is as follows: the accuracy of each Method is
obtained in the training step, then the predicted value for each data in
the test step is calculated in each Method, then they are multiplied,
and after that added together, finally will be divided to the total
accuracy of two methods. The results obtained from the weighted average
Method show the success of the proposed Method.
IL-7 improves the fitness of regulatory T cells for adoptive transfer
Authors: Monti Paolo , Cosorich Ilaria , Filoni Jessica , Dedda Carla Di , Ferrari Arianna , Piemonti Lorenzo
Published: May 2023

Adoptive regulatory T cell (Treg) trasfer represents a potential
therapeutic option to control immune responses in organ transplantation,
graft vs host disease, and autoimmunity, including type 1 diabetes. Treg
for adoptive therapy are traditionally sorted and expanded in
vitro with high doses of IL-2, showing stability and suppressive
capacity, but with some limitations in terms of long-term survival once
infused in patients. Here, we tested a novel expansion protocol in which
we added IL-7 (IL-7 method, IL-7M) to the traditional standard method
(StM) using IL-2. We showed that naïve Treg express significant levels
of CD127 and robustly respond to IL-7 by phosphorylating STAT-5. Naive
Treg expanded with the IL-7M were highly enriched in CD45RA
CD62L CD95
showing a reduction in the final cell yield and suppressive function.
Treg expanded with the IL-7M preserved telomere length and were more
resistant to cytokine withdrawal and fas-mediated apoptosis. Overall our
data indicate that it is possible to expand naïve Treg in the presence
of IL-7 to generate a final Treg product enriched in poorly
differentiated CD45RA cells and with better
resistance to stress and apoptosis, potentially improving the long-term
survival of Treg in adoptive transfer protocols.
Effects of circadian rhythm and daily physical activity on short-term heart rate variability in young healthy adults: A pilot study
Authors: Atanaskovic Marko , Nemet Marko , Tapavicki Borislav , Vasilic Milica , Stanic-Hadzalic Ivona , Garipi Enis
Published: May 2023

Introduction. Heart rate variability is the leading non-invasive method used
for assessing the activity of the autonomic nervous system. Investigation of
the changes in the autonomic nervous system activity under the influence of
circadian rhythm and daily physical activity can be beneficial to exercise
at the best time of the day and at regular time intervals. Furthermore, it
can be used to determine the optimal level of total daily physical activity.
This study aimed to demonstrate the effects of circadian rhythm and daily
physical activity on the autonomic nervous system at rest through short-term
measurements of heart rate variability. Material and Methods. Fifteen young
healthy adults participated in the study. Heart rate variability was
measured on three separate occasions. During these visits, heart rate
variability measurements were made in the morning, in the afternoon hours
following a physically active day, and in the afternoon hours after a
physically inactive day. Results. Our study showed no significant
differences in the parameters of heart rate variability measured at
different times of the day. A comparison of heart rate variability values
after a physically inactive day and heart rate variability values after a
physically active day did not show a significant difference in any of the
heart rate variability parameters. Conclusion. Short-term measurements of
heart rate variability showed no impact of circadian rhythm and daily
physical activity on heart rate variability at rest.
Variables orientadas a la prevención de la violencia contra las mujeres en bachillerato
Authors: Treviño Villarreal Diana Carolina , González Medina Mario Alberto
Published: May 2023

La violencia contra las mujeres es un tema que ha resonado a través de los años y se ha manifestado al interior del espacio escolar. Asimismo, se ha relacionado con variables como el sentido de pertenencia, la autoeficacia, el miedo al fracaso y el apoyo emocional parental. Por tanto, el objetivo de este estudio fue determinar la relación entre dichas variables. La muestra estuvo compuesta por 3,826 mujeres y se utilizó el cuestionario de PISA 2018, junto con índices de escala (variables). Para comprobar el modelo teórico, se aplicó el análisis de senderos, llegándose a encontrar relaciones directas del sentido de pertenencia, miedo al fracaso y apoyo emocional parental con la violencia escolar, así como una relación indirecta de la autoeficacia con la violencia escolar. En conclusión, es importante que las escuelas tomen en cuenta las variables analizadas para prevenir la violencia escolar contra las mujeres en el bachillerato.
Performance of educational personnel in school data management in Madrasah Tsanawiyah
Authors: Yulianti Heni
Published: May 2023

This study aims to find out and obtain in-depth information about the performance of education personnel in managing school data at MTs Negeri 2 Bandar Lampung by looking at: (1) the competence of madrasa administration staff; (2) motivation of madrasah administrative staff and (3) feedback as the service quality of madrasah administrative staff. This research is a qualitative descriptive study. The place that became the object of research was MTs Negeri 2 Bandar Lampung. The subject of this research is the head of madrasa administration staff. The informants in this study were the madrasah administrative staff themselves, the madrasa principal, teachers, students, and the community. Methods of data collection using interviews, observation, and documentation. Test the validity of the data using triangulation of sources and methods. The data analysis technique used is done interactively which includes: data reduction, data presentation, and concluding. The results of the study show that the competencies possessed by each madrasa administrative staff are by their respective fields which include personality competence, social competence, managerial competence, and technical competence. The motivation given by the head of the madrasa and the head of administrative staff to each administrative staff is still not optimal, especially the lack of monitoring and evaluation so that it affects the performance of administrative staff in carrying out their duties. Feedback as the quality of service provided by administrative staff to customers, namely students, all madrasa employees, and the community is quite satisfactory so that many parents entrust MTs Negeri 2 Bandar Lampung as the school of choice, both domiciled near or far from the madrasa.
Marketing Strategy for Integrated Islamic Elementary School Pelita Khoirul Ummah
Authors: Pratama Septian
Published: May 2023

Education is a primary need for everyone, especially the age level of children to early adulthood. Schools will be places for students to learn and develop their potential, therefore schools need to attract parents and students to choose their schools by providing adequate facilities, infrastructure and conducting marketing efforts. The Integrated Islamic Elementary School Pelita Khoirul Ummah Established in 2013 with the status of a private school under the foundation, and having its address at Jalan Langkapura, Bandar Lampung, has experienced positive growth every new academic year marked by the number of new students that continues to increase. However, opportunities and threats from external factors must be considered, in addition to trying to increase strengths and overcome weaknesses. This study aims to formulate a strategy to increase the competitive advantage of SDIT Pelita Khoirul Ummah through marketing strategy planning by analyzing its internal and external environment. This research includes applied research with a descriptive approach and qualitative method, with data sources obtained through Focus Group Discussions and interviews, then the data is analyzed using Internal Factor Analysis Summary (IFAS) and External Factor Analysis Summary (EFAS), strategy analysis is carried out using the SWOT matrix. The position of the school is in quadrant 1. The strategy that must be developed is a growth-oriented strategy by trying to expand and increase market.
Teacher Work Culture In Madrasah
Authors: Mustofa Dwi Rohmadi , Dermawan Oki
Published: May 2023

The work culture of teachers in madrasah needs to be formed to achieve sustainable changes in the workplace, including increased productivity, so that teachers can have the following: Understanding the basic substance of the meaning of work: attitude towards work and the work environment, behavior when working, work ethics, attitude towards time, and ways or tools used to work. The purpose of this study was to determine the work culture of Madrasah Aliyah teachers in Central Lampung Regency, Indonesia. The research data collected through in-depth interviews, direct observation, and documentation were analyzed through the processes of data reduction, data display, and conclusion or verification. The validity of the data in this study was tested for credibility (internal validity), transferability (external validity), dependability (reliability), and confirmability (objectivity). According to the findings, teachers' work culture in improving the quality of learning in madrasah aliyah in Central Lampung Regency includes 1) integrity and professionalism. 2) Leadership and exemplary 3) Togetherness and group dynamics 4) Accuracy and speed 5) rationalism and emotional intelligence.
Teacher Perceptions: Principal Leadership, Teacher Discipline and Their Influence on Teacher Performance
Authors: Maisinur Elza , Rosidin Undang
Published: May 2023

The purpose of this study is to determine the impact of madrasah principal leadership and discipline on teacher performance at Baitul Muslim Integrated Islamic Elementary School Way Jepara, Lampung Timur, Indonesia. Correlational research design is used to test the strength or weakness of the relationship between perceptions of principal leadership, and teacher work discipline, with teacher performance. this research is a population study. The research data were collected using questionnaires and documentation methods. The research data were analyzed using the descriptive quantitative analysis method with the calculation of Pearson correlation (product-moment) with the help of SPSS version 21. The results of the study show that there is a positive and significant influence between teachers' perceptions of the leadership of principals and teacher performance at Baitul Muslim Integrated Islamic Elementary School Way Jepara, Lampung Timur, Indonesia,. There is a positive and significant influence between work discipline and teacher performance at Baitul Muslim Integrated Islamic Elementary School Way Jepara, Lampung Timur, Indonesia. The achievement or improvement of teacher performance is largely determined by teachers' perceptions of the principal's leadership and work discipline. The results of the analysis show that discipline is one of the factors originating from internal teachers that support the improvement of teacher performance. Good discipline will have a maximum impact and encourage teachers to maximize their performance.
Guerras y collage capitalista
Authors: Gelacio Panesso Juan David
Published: May 2023

Este breve texto intenta presentar una idea ampliamente desarrollada por Alliez & Lazzarato sobre las guerras y el capital. Inicia con una pregunta sobre qué significa pensar las guerras, para mostrar que éstas son ante todo la condición de posibilidad del capital y que, según momentos históricos, renuevan sus mecanismos y estrategias, combinándolas cuando sea necesario. Las guerras no aparecen como un evento circunstancial que irrumpen en el orden temporal del capital, sino que son estrategia y condición permanente. Las máquinas de guerra del capital desplazan el teatro de guerra dentro de las poblaciones intensificando las luchas en todo nivel: raza, sexo, comunicación, subjetivación; fluyendo de las guerras sangrientas a las no sangrientas, como se hace evidente en el caso colombiano. Para terminar, una nota inconclusa sobre la importancia de leer las guerras y el collage capitalista a contrapelo para acceder a una mirada estratégica del mundo.
transformación de la democracia: Participativa, representativa, plebiscitaria y electrónica
Authors: Estrada Villa Armando , Cerón Gonsalez Edgar William
Published: May 2023

La democracia es el gobierno del pueblo, por cuanto éste es el titular de la soberanía, que puede ser ejercida directamente o por medio de sus representantes. Según el mayor o menor protagonismo y actuación del pueblo en el proceso de decisión política, sea porque actúa por sí mismo, se habla de democracia directa o participativa, o por medio de representantes que él elige, se habla de democracia indirecta o representativa. Y entre éstas dos, se ubica una intermedia, ya que toma elementos de la directa y la indirecta, que se denomina democracia plebiscitaria y aquella que utiliza dispositivos informáticos para gestionar la política con instrumentos propios de la tecnología digital, se denomina democracia electrónica. En este sentido, el artículo buscar aproximar al lector sobre los diferentes tipos de democracia que se han dado en la historia: la participativa, la representativa, la plebiscitaria y la electrónica, describiendo sus ventajas y los peligros que representa.
Impactos da quarta revolução industrial no direito: uma análise preliminar
Authors: Nagao Menezes Daniel Francisco
Published: May 2023

O artigo, de natureza descritiva, discute o impacto global que a quarta revolução industrial trouxe no plano jurídico. Além disso, descreve como são gerados cenários jurídicos que não necessariamente garantem a acessibilidade a todos os grupos sociais de diferentes países, pois sua participação está condicionada ao uso de condições externas (instrumentos) como eletricidade e internet, ou seja, ou seja, ferramentas mínimas para desempenho em um ambiente social cada vez mais competitivo o que gera a necessidade de uma reformulação do Direito para atender a nova complexidade trazida pela nova revolução industrial. A metodologia utilizada é a hipotético dedutiva utilizando como procedimento metodológico a revisão bibliográfica.
Hacia una epistemología decolonial bio céntrica latinoamericane
Authors: Sepúlveda Arellano María José
Published: May 2023

La transformación sociopolítica a la que está apostando una masa considerable del territorio-cuerpo-nación de Chile, invita a cuestionar nuestra ética y posicionamiento político a la hora de producir conocimiento. Se  realiza un análisis crítico de la realidad de ls cientistas sociales de la región Latinoamericana, cuestionando la producción de conocimiento y la sostenibilidad de este en un contexto global capitalizado y gobernado por el tecnicismo. Postulando la importancia de aprender a sostener las preguntas e incertidumbres en el periodo de transición sin abandonar un enfoque critico que incorpore la transindividualidad y decolonialidad.
Papel del arte en la reparación simbólica y reivindicación de derechos en Colombia: Revisión sistemática
Authors: Melo Andrade Kelly Natalia
Published: May 2023

Las violaciones a los derechos humanos y el conflicto armado en Colombia afectan drásticamente la dimensión material e inmaterial de las víctimas. Por ello, se garantiza la reparación integral para restaurar el daño y restablecer los derechos. La reparación simbólica articula derechos y garantías que restauran el daño mediante la transformación de realidades. Busca la dignificación de la víctima, construcción de memoria y prevenir la revictimización. El arte es una herramienta valiosa en términos de restauración porque crea símbolos y significados que sitúan a la víctima en una situación nueva. Con proyección al futuro, pero sin olvidar el pasado. La potencialidad del arte para contribuir a la reparación simbólica está en su dinamismo y capacidad de acoplarse a diversas situaciones. Dignifica a las víctimas, otorga voz, transforma percepciones, genera símbolos y gestiona traumas. Crea narrativas con denuncias, causas y soluciones respecto a las transgresiones de los derechos. Este trabajo consiste en una revisión sistemática con perspectiva jurídica. Vislumbra la incidencia del arte en la reparación simbólica en contextos de violaciones a derechos humanos y conflicto armado en Colombia. Se examinan documentos que contienen representaciones artísticas realizadas por víctimas y artistas. Además, artículos sobre reparación simbólica, arte y derechos humanos.
Segmentation of transport network by separation property for building transportation hub system
Authors: Penkovskaya Kseniya Vyacheslavovna , Suslov Aleksandr Nikolaevich , Poznyakov Sergey Ivanovich
Published: May 2023

The article considers the problem of segmenting the interrelated terminals of a transport network into a fixed number of relatively autonomous transport hubs when solving transport technical problems. There has been proposed a most common and simple option for solving the graph partition problems - a problem of segmenting the transport network by r-partitioning. Useful practical approaches to solving the problem are studied. There has been proposed an assessing version for developing the transport network segmentation procedures and their content-richness. A heuristic procedure for the transport network segmentation by separation property for building the transportation hub system is defined. For the considered heuristic procedures of solving the set problem there is conducted the study of heuristic procedure properties and assessed the worst scenarios. It is found that the segmentation of the regional transport network into separate transport hubs using the described procedures can be carried out for the subclass of separable tiling or separable on average tiling, if no further possible improvements could be assessed. The considered procedures of the regionʼs transport network graph segmentation have one common feature: these procedures preserve some beneficial properties in tiling obtained in the course of building the transportation hub. It has been stated that the procedures can serve as a ground in the synthesis of a hierarchical group represented as a chain of inner tilings, each being “good” in terms of cluster analysis. The assessment richness of the transport network partitioning into the transport hubs is analyzed using a computational experiment.
Analysis of ship accidents caused by unreliable operation of cooling systems of ship power plants
Authors: Harlamova Anna Eduardovna , Pokusaev Mikhail Nikolaevich , Trifonov Alexei Viktorovich
Published: May 2023

The article considers transport accidents on watercrafts in inland waterways, sea and ocean waters caused by unreliable operation of the main systems during operation in ice and shallow water conditions difficult for naviga-tion and by the violations technical operation rules by the crew members. There are given the statistical data on the accidents and causes of accidents on the water. Frequent breakdowns due to unreliable operation of the open (two-circuit) cooling system of the ship’s power plants are stated. Open systems, in which fresh water circulating through cooled power equipment is cooled by the seawater, do not provide the required reliable operation in shallow water and broken ice, causing the shutdown of the ship power plant or an emergency situation. Mechanical impurities entering the cooling system cause corrosion-erosive destruction of the pipelines, main elements and operational load on seawater filters. In the winter, the operation of the ship in shallow sections of the routes leads to clogging of sea chests with small ice particles (studge ice) and a poor seawater intake for cooling ship power units. The ship systems fail using seawater, which makes difficult the operation of the cooling system of the power plant. It has been inferred that using closed cooling systems makes it possible to solve the problem of reliable functioning of the watercrafts in the conditions of shallow waters and broken ice.
Selecting methods of continuous monitoring of torsional vibrations in ship propulsion complexes
Authors: Gorbachev Maxim Michailovich , Kolyvanov Vladimir Viktorovich
Published: May 2023

The article considers the problem of the continuing emergency damages to the elements of ship engine-propulsion systems with fatigue failures of shaft pipelines. The classification societies require to analyze and measure the dangerous torsional vibrations in ship power plants. There is given an overview and comparison of methods of measuring torsional vibrations in order to determine the most promising ones for constant monitoring and diagnostics of the technical condition of the elements of marine propulsion systems. In the course of analysis of scientific and technical literature there have been identified the main methods of measuring torsional vibrations, which formed the basis for developing the national and foreign measuring software and hardware complexes. The marine conditions surely require the appropriate design and operating principles from the monitoring systems, therefore, such methods as strain measurement, using laser and optical sensors with reflective tape, inductive sensors with gears are defined as promising. There is illustrated a diagram of the measuring bridge of four load cells, given an example of the design and positioning of the IVC Technologies strain gauge system on the shaft, considered the Geislinger systems with a spring damper and measuring gears. There are presented the illustrations of the OROS measuring system, the Konsberg system, the RT-660 radiotorsiograph, the SCAN optical torsiograph developed by JSC Central Research and Design Institute of the Marine Fleet (TsNIIMF), the TNK-1 sensor, the BAGS-4M measuring complex and others. The results of the study will be used to develop experimental samples of a monitoring system with the selected methods for measuring torsional vibrations and conducting tests in the laboratory and on board a ship.
Applying improved D-partitioning method to define parameters of generators in ship power system
Authors: Guseva Elena Victarievna , Koneva Svetlana Andreevna , Tsaloev Vladimir Muratovich
Published: May 2023

Determining the parameters of the elements of the ship electric power system in the limiting operation mode is carried out by constructing the boundaries of the system stability areas. To improve the efficiency of calculations of limiting modes, it is necessary to create mathematical models and methods that fully take account of the spe-cifics of equations that describe steady-state modes. There is proposed an improved D-partitioning method designed to select parameters that ensure stable parallel operation of the generators. The traditional method of D-partitioning is based on the assumption that usually the desired sets are a union of regions. In particular, this is the case for the linear systems with linear dependence on parameters. In this case, a problem of constructing the stability area can be reduced to a problem of determining the boundary of each area and indicating on which side of the boundary the points of the desired area lie. The main drawback of the D-partitioning method in the traditional formulation is that the range of values is obtained for both real and complex values of the variable parameter. There are considered the equations defining the D-partition curve for the case of linear dependence on one parameter of the coefficients of the characteristic polynomial. For the numerical solution of these equations there is proposed a method that, unlike the known methods, does not require cumbersome and poorly conditioned transformations of the characteristic polynomial.
Stress Shielding Prediction of Unicortical and Bicortical Screws: A Finite Element Analysis
Authors: Basaruddin Khairul Salleh
Published: May 2023

The stability in an implant fixation plays a vital role in ensuring proper formation and remodelling process of the fractured bone. Failure in implant fixation is commonly associated with short- and long-term instability of the bone-implant interface. The bone-implant interaction creates a complicated mechanical interplay that might influence the stress distribution and hence the biomechanical performance stability of the implant fixation. Furthermore, implant screw parameters namely thread size, geometrical design and material properties become additional factors that affect the bone-implant interaction. The purpose of this study was to investigate the effect of unicortical and bicortical screws’ parameters on the screw-bone interaction mechanism. To evaluate the stress transfers between screw and bone, the stress parameters namely stress transfer parameters (STP) was employed. A two-dimensional (2D) finite element model of full treaded screw was simulated while varying the parameters of the screw: two types of material (stainless steel A316 and titanium alloy Ti-6Al-4V), screw length and screw pitch. It was found that the lower in elastic modulus results to the higher stress transfer between implant- bone interface. As the titanium have lower elastic modulus, it gave higher values of STP which help to transmit and distribute stress better compared to the stainless steel. While the effect of varying screw pitch between two types of screws shows that STPs values of fully threaded bicortical screws shows significant result for finer pitch size that may advancing bone remodelling process at the early stage.
Circulación y recepción de las observaciones higienistas urbanas, 1850-1930
Authors: Dávalos Marcela
Published: May 2023

La construcción de los saberes fue consecuencia de los consensos sociales y la consolidación de las instituciones. Médicos, ingenieros y funcionarios, entre otros protagonistas, a pesar de las diferencias, construyeron una serie de postulados que le darían sostén “a su saber”. Este saber fue confeccionado a partir de “congresos, convenciones, investigaciones, reformas urbanas o legislaciones”, lo cual sirvió para configurar una guía sanitaria que fue divulgada, de forma masiva, en los poblados remotos y rurales. Las fuentes dan cuenta de cómo se construyeron esos saberes, pese a eso, están lejos de explicar “las prácticas de las poblaciones a quienes estuvieron dirigidos”. Tales disposiciones incidieron directamente sobre el desarrollo de la ciudad y configuraron una pedagogía sanitaria. Lo anterior invita a reflexionar sobre otras prácticas que, de haberse perfeccionado, podrían haber marcado rutas, otras vías, hacia la higiene pública. Desde los parámetros de desigualdad y las insuficiencias higiénicas mundiales hoy día registrados, otra narrativa apunta a encontrar alternativas de existencia. Al indagar en diferentes contextos históricos o buscar conceptualizaciones distintas, no hacemos más que reconocer nuestros límites: ¿Se anuncia con esa búsqueda (y más enfáticamente luego de la era COVID) un nuevo significado de salud e higiene pública?
instituto da prescrição, o princípio da eficiência e a razoável duração do processo na jurisdição penal
Authors: Kucarz Darciano , Taporosky Filho Paulo Silas
Published: May 2023

O presente artigo busca analisar se e de que forma o princípio constitucional da eficiência pode ser analisado junto ao processo penal, tendo como liame o instituto da prescrição penal, pontuando quais são suas nuances para as partes que estão envolvidas no processo criminal, argumentando-se ainda de forma breve acerca do princípio da razoável duração do processo, cuja repercussão de sua observância e efeitos é mais condizente com a jurisdição penal, uma vez que o princípio base no qual se norteia o problema desse trabalho é próprio do direito administrativo. A metodologia utilizada ao trabalho é a dedutiva e a técnica aplicada é a pesquisa bibliográfica, considerando as contribuições de autores que já abordaram o tema, além da análise de dados obtidos em relatórios apresentados pelo Conselho Nacional de Justiça e pelo Tribunal de Justiça de Santa Catarina. Com o presente estudo, concluiu-se que a principal causa que enseja no fenômeno jurídico da prescrição penal é o não cumprimento e não observância de alguns prazos processuais, o que acaba por ocorrer por variados motivos, tendo-se ainda que, numa leitura próprio do princípio, a razoável duração do processo não é observada pelo Estado a partir dos dados analisados, uma vez que apenas a instrução probatória, etapa que é responsável por aproximadamente 70% da duração total de um caso, figura como sendo a principal responsável pela alta duração típica dos processos.
Acordo de Paris
Authors: Wisznieiwski Gustavo , Wechinewsky Patricia Minini
Published: May 2023

Não é de hoje que a comunidade internacional chama à ação e à responsabilidade os principais atores políticos e sociais para discussão e adoção de medidas de salvaguarda ambiental. O Brasil durante muito tempo se esforçou para tornar-se uma voz ativa frente à governança ambiental, no entanto, nos últimos anos, tem deixado de lado o protagonismo até então exercido nessa área. O Acordo de Paris foi o responsável pelo desenvolvimento de um novo sistema de participação voluntária das partes através das Contribuições Nacionalmente Determinadas. Uma nova ordem jurídica faz surgir novos paradigmas, nesse sentido, buscou-se por meio de pesquisa exploratória em meios físicos e eletrônicos, utilizando-se o método indutivo, verificar a possibilidade de a comunidade internacional responsabilizar um Estado pelo não cumprimento do Acordo de Paris, respeitando sua soberania. Como conclusão destaca-se que com base unicamente no Acordo de Paris não há possibilidade de responsabilização de um Estado parte pelo descumprimento das avenças, ficando, assim, à mercê da diplomacia climática estabelecida entre os diversos atores que compõe a comunidade internacional. A cidadania ativa e fiscalizadora, interna e externa, tem papel fundamental em compelir as partes para, ao menos se esforçarem a atingir metas através políticas públicas voltadas à mitigação dos efeitos climáticos.
Lei geral de proteção de dados
Authors: Rogalewski Maiara , Vidal Nelson
Published: May 2023

A Lei geral de Proteção de Dados (LGPD) surge com o intuito de garantir a segurança dos dados pessoais, de qualquer indivíduo, disponibilizados na rede, e o presente artigo científico apresenta a problemática enfrentada para a proteção desses dados diante do avanço imensurável da tecnologia da informação. O objetivo geral é analisar a LGPD. E os objetivos específicos são: analisar os seus princípios, e desta forma identificar como a personalidade das pessoas vem a ser moldada pela influência da tecnologia atual, e, também, indicar a importância de salvaguardar a proteção dos Dados Pessoais Sensíveis apresentados na lei. São abordados aspectos da Lei Geral, analisada frente aos direitos e garantias fundamentais e à dignidade da pessoa humana. Através de pesquisas bibliográficas em que foram consultadas publicações em geral como obras, revistas, jornais e artigos científicos online, procurou-se chegar a conclusões dedutivas sobre a importância da Lei de Dados se aplicada de maneira certa, no tocante aos direitos fundamentais do indivíduo.
Simbología de la sombra
Authors: Parreño José M.
Published: May 2023

Dejando de lado la utilización de la sombra y del sombreado como elementos del lenguaje pictórico, la sombra, como tema en sí mismo, es muy poco frecuente en la pintura. Se ha representado en contadas ocasiones con anterioridad al siglo XX y hasta entonces, que sepamos, exclusivamente para ilustrar dos temas concretos.
Fiestas en Málaga por la canonización de San Fernando
Authors: Pérez del Campo Lorenzo
Published: May 2023

Es perceptible en nuestra sociedad una cierta nostalgia de la fiesta; son numerosos los espectáculos que aspiran a convertirse en fiesta, no son escasas las reuniones ciudadanas que pretenden emular su esplendor. Estas múltiples manifestaciones han provocado un notable interés de los historiadores del arte por analizar el fenómeno.
The Energy Management System According to the Norm ISO 50001
Authors: Bago Drago , Bešo Ena , Kujundžić Goran
Published: May 2023

The final paper presents an approach to solving the problem of optimal use of electrical energy in the production process. An analysis of all important parameters, limitations, and goals was performed, after which a mathematical model was created and used in writing Matlab code to solve the problems. It is the basis for further upgrading following the needs of each organization and because of that, it can be very significant.
Legal Nature of Concessionaire and Public-Private Partnership Contracts
Authors: Bano Elona , Ahmeti Edmond
Published: May 2023

This paper aims to analyze the legal nature of concessionaire and PPP contract in Albanian Legislation and through the perspective of European legislation analyzing mainly the Italian and French legislation and doctrine in this area. The main hypothesis that this paper aims to address is related to the fact, if it is enough to categorize these kinds of contracts with a hybrid status between public and private law, or the fact that so many countries appellate more and more to the concessionaire and PPP contracts is the momentum to create a separate law discipline as so many universities in France, USA, Japan do. Also, this paper aims to make a comparative study of Albanian legislation in the area of concessionaire and PPP contracts with the European legislation being the fact that for Albania this is a new area, and is a considerable lake of doctrine and legal studies that analyze the specifics and characteristics of such kind of contracts, putting at the last instance not only the Albanian contractual authorities but also the national courts in difficulties of implementation and interpretation.
Innovative School Leadership Aspects
Authors: Nebieridze Khatuna
Published: May 2023

This study examines the managerial role of five school principals in Tbilisi in sustaining success and innovation. It describes the management and leadership practices of five school principals, who are considered to be innovative, well-managed, with excellent academic results, and highlights the principals’ own contributions for school innovation and success. The study used the case study method based on the qualitative research method. At each school, opinions on school governance were gathered through individual interviews with the school principal, representatives of local resource centers, and other members of the school board. students and members of the school community. This study provides insight into organizational culture and school changes, as well as the principal role of principals in creating and managing a successful and innovative school. The study uses stakeholder perspectives on school leadership and school performance to provide us with insight into school management in each case, as well as draw attention to differences and similarities between different cases. The research findings highlight the importance of principals’ life experiences in determining their management style and values. Innovative principals identify five common aspects of leadership and related behaviors that characterize their leadership style and underpin the success of their schools. Furthermore, innovation schools have common characteristics. A map of how the principal’s management style and school innovation and success, life experience, five managerial aspects and corresponding behaviors, and other elements of school success are related to innovative aspects of management and leadership has been developed. Realizing what works in successful and innovative schools is the preliminary step in determining how to direct the practice of such schools to those parts of the school that require this experience. The current study demonstrates an innovative management style, demonstrating that some principals are very successful in creating an innovative culture, including behavioral patterns that can be learned and used by people aspiring to innovative and successful school management.