bluuebunny/crossref_metadata_2025 huggingface dataset:
Características financieras de las empresas de la Bolsa de Valores de Lima que explican la decisión de realizar una IPO durante el periodo 1996 - 2014
Authors:   , Cucho Goyas Mariel de los Angeles , Cajahuanca Atencio Jakelin Arisely
Published: September 2023

La presente investigación, tiene como objetivo principal determinar características financieras de empresas de la Bolsa de Valores de Lima que explican la decisión de realizar una Oferta Pública Inicial de acciones, durante 1996-2014. El interés por este tema se debe al limitado desarrollo de las IPO’s en el Perú durante los últimos 25 años. De acuerdo con los anuarios estadísticos de 1996-2021 publicados por la SMV, solo seis empresas han realizado una IPO de acciones. Por ello, se considera importante investigar y dar a conocer los factores financieros que intervienen en la decisión de las compañías para emitir una IPO y financiarse vía Equity. Para fines de este estudio, se realizó una investigación cuantitativa a una muestra de 20 empresas, con una regresión logística binaria para datos de panel. Los resultados determinan que las tres variables propuestas como “características financieras” (margen neto, tamaño relativo y multiplicador de capital) tienen una relación negativa con la decisión de emitir una IPO y solo el multiplicador de capital resulta estadísticamente significativo. Los hallazgos se apoyan en los estudios de: (i) Pagano et al., (1998), quien determina que la rentabilidad termina siendo insignificante; (ii) Farinos y Sanchis (2009) quienes concluyen que el ROA no es significativo y puede resultar una variable engañosa para comparar empresas con diferentes estructuras de capital; (iii) Lee et al., (2020); (iv) Adamuz y Rivas (2018) y (v) Shen y Wei (2007) quienes determinan que las compañías prefieren un menor nivel de apalancamiento para no señalar dificultades financieras y causar una infravaloración en sus acciones. Asimismo, se ratifican las proposiciones conceptuales de las teorías del Pecking Order según Myers y Majluf (1984) y la Selección Adversa según Leland y Pyle, (1977).
Optimal ℓ1-robust tracking for autoregressive plant with unknown nominal model
Authors: Sokolov V.
Published: September 2023

This paper addresses the problem of adaptive optimal robust

tracking for a discrete-time plant with unknown parameters

of autoregressive nominal model and unknown bias of

bounded external disturbance. Upper bounds of unbiased external

disturbance and gains of uncertainties in output and

control are assumed to be know. The optimal tracking problem

is to minimize the guaranteed worst-case steady-state

upper bound of the tracking error for a given bounded reference

signal. Solution of the problem is based on optimal

set-membership estimation of unknown non-identifiable parameters

and treating the control criterion as the identification

criterion. Optimal on-line set-membership estimation

becomes computationally tractable due to a linear-fractional

representation of the control criterion.
Massless Stueckelberg particle, solutions with cylindric symmetry
Authors: Semenyuk O. , Pletyuhov V. , Buryy A. , Ivashkevich A. , Red'kov V.
Published: September 2023

The massless Stueckelberg field is studied in cylindrical coordinates.

The field function consists of the scalar, 4-vector,

and antisymmetric tensor. Physically observable components

are the scalar and 4-vector. We apply the Stueckelberg

tetrad-based matrix equation, generalized to arbitrary Riemannian

space, including any curvilinear coordinates in the

Minkowski space. We construct solutions with cylindric symmetry,

while the operators of energy, of the third projection

of the total angular momentum, and the third projection of

the linear momentum are diagonalized. After separating the

variables we derive the system of 11 first-order differential

equations in polar coordinate. It is solved with the use of the

Fedorov–Gronskiy method. According to this method, all 11

functions are expressed through 3 main funcions. According

to the known procedure we impose the differential constraints,

which are consistent with the all 11 equations and

allow us to transform these equations to algebraic form. This

algebraic system is solved by standard methods. As a result,

we obtain 5 linearly independent solutions. The problem of

eliminating the gauge solutions will be studied in a separate

paper.
Dynamical theory of X-ray diffraction in crystals based on two-dimensional recurrent relations
Authors: Kolosov S. , Punegov V.
Published: September 2023

Using two-dimensional recurrence relations, a description of

dynamical X-ray diffraction in crystals is presented. It is

shown that this approach makes it possible to calculate Xray

fields inside the crystal and reciprocal space maps.
PENGARUH CITRA MEREK, E-WOM, DAN KESADARAN MEREK TERHADAP NIAT MEMBELI MIE LEMONILO PADA PENGGUNA MARKETPLACE DI JAKARTA MELALUI LAZADA [EFFECT OF BRAND IMAGE, E-WOM, AND BRAND AWARENESS ON PURCHASE INTENTION OF MIE LEMONILO IN MARKETPLACE USER IN JAKARTA THROUGH LAZADA]
Authors: Hartono Jonatan Dwi , Lego Yenny , Widjaja Oey Hannes
Published: September 2023

The purpose of this study was to test brand image, E-WOM, and brand awareness that can affect the intention to buy noodle products. The population in this study were all marketplace users in Jakarta. The sample in this study was 100 respondents using non-probability sampling method with purposive sampling technique. All respondents are consumers that using Lazada to buy Lemonilo. The data collection technique used in this study used a questionnaire distributed through social media. The software used in this study is SmartPLS 3. The results of this study showed that the brand image variable having a positive and insignificant effect on the intention to buy Lemonilo healthy noodle products in Jakarta through the Lazada application. The results of this study also state that the E-WOM variable and brand awareness have a positive and significant influence on the intention to buy Lemonilo healthy noodle products in Jakarta through the Lazada application.

Bahasa Indonesia Abstrak: Tujuan dari penelitian ini adalah untuk menguji citra merek, E-WOM, dan kesadaran merek dapat memengaruhi niat membeli produk mie. Populasi dalam penelitian ini adalah seluruh pengguna marketplace di Jakarta. Sampel pada penelitian ini sebanyak 100 responden dengan menggunakan metode non probability sampling dengan teknik purposive sampling. Teknik pengumpulan data yang dilakukan dalam penelitian ini menggunakan kuesioner yang disebarkan melalui media sosial. Software yang digunakan dalam penelitian ialah SmartPLS 3. Hasil dari penelitian ini menunjukkan bahwa variabel citra merek memiliki pengaruh positif dan tidak signifikan terhadap niat membeli produk mie sehat Lemonilo di Jakarta melalui Aplikasi Lazada. Hasil dari penelitian ini juga menyatakan variabel E-WOM dan kesadaran merek memiliki pengaruh positif dan signifikan terhadap niat membeli produk mie sehat Lemonilo di Jakarta melalui Aplikasi Lazada.
Bentuk Pemenuhan Kebutuhan Anak Asuh di Lembaga Kesejahteraan Sosial Anak Al-Firdaus
Authors: Geneoadi Fiesta , Shidiq Mahfudz , Arif Arif
Published: September 2023

LKSA Al- Firdaus is an institution that provides substitute services for parents in meeting the needs of children who have an underprivileged background, do not have a complete family, neglected children and delinquent children. Referring to the conditions on the ground that all foster children do not live in the Al-Firdaus orphanage. Apart from that, regarding the physical condition of the children who looked healthy, contained even though they came from underprivileged families. This study aims to describe the form of meeting the needs of foster children at LKSA AlFirdaus. Researchers used a qualitative approach with a descriptive type of research. The informant determination technique uses purposive. Data collection techniques using non- participatory observation, semi- structured interviews, and documentation. The data analysis technique used four stages, namely data collection, data reduction, display data and conclusion drawing/ verification. In addition, the researcher used method and source triangulation techniques. The results of this study describe the form of meeting the needs provided by LKSA to their foster children. The conclusion is that the form of meeting the needs of foster children at LKSA Al- firdaus is in the form of (1) fulfilling physiological needs which include fulfilling clothing, food, health, and education (2) meeting security and safety needs (3) meeting social needs (4) meeting social needs appreciation (5) fulfillment
Teaching empathy on an online social work placement: Relationship-based practice teaching
Authors: O'Brien Elaine , Halton Carmel , Rose Joanne , Drinan Chelsea
Published: September 2023

In this article, the author reflects on their experience of teaching and supervising an MSW student on placement, in a fostering agency, during COVID-19. The author emphasises the practical and pedagogical challenges they experienced when developing learning opportunities for online placement, during a global pandemic. The article points to design features of the placement, to their implementation, and discusses learning outcomes for the student and practice teacher.
The author drew on related literature when preparing for and designing the placement. They were guided by the work of Bennett (2008) and their principles of effective supervision, the Kolb learning cycle (1984), and research on empathy (Morrison, 2005; Gerdes, et al 2011).The author focused on representing how role modelling the skill of empathy in the supervision space was used to support their practice teaching methodology. The student feedback on completion of the placement provides evidence that supports the author’s contention that supervision must be made a safe context for student learning. In addition, the use of ‘role modelling’ as a teaching methodology and the importance of ‘relationship building’ between the practice teacher and the student in the supervision space are critical components of the placement learning experience and subsequent learning outcomes.
Analysis of the Impact of Wheel Dynamic Load on Rails under High-Speed Train Operations in Uzbekistan
Authors: Dzhabbarov Saidburhan , Kodirov Nodirbek
Published: September 2023

Purpose: Justification of choosing the factors influencing the formation of dynamic load on the railway track by modern rolling stock during high-speed and very high-speed operations. To achieve this goal, theoretical groundwork and experimental research have been conducted. As a result of the work, a methodology has been developed for determining the vertical calculated force exerted by the wheel on the rail. Methods: High-speed and very high-speed trains, due to their fundamental design and significant increase in speed, necessitate a reconsideration of methods for calculating the impact of rolling stock on the railway track. This includes the analysis of relationships between root-mean-square deviations of various dynamic forces and the assessment of the influence of different factors at different speeds of operation. Results: As part of the study, experimental measurements have been conducted to examine changes in dynamic load. As a result, dependencies between the average and calculated vertical forces and the speed of operation for modern passenger trains have been obtained. By using factorial analysis of variance, numerical characteristics of the influence of various factors on the value of the vertical force exerted by the wheel on the rail have been obtained. Additionally, the degrees of influence of different factors on the formation of this force have been determined.
A System for the Joint Use of Coalbed Lean Methane and Biogas to Generate Electricity in Coal Mines
Authors: Haritonenko Aleksandr , Zav'yalov Aleksey , Zachinyaev Yaroslav
Published: September 2023

Purpose: Justification and development of new resource-saving technologies aimed at utilization of coal bed methane. The problem of low efficiency of utilization of lean methane-air mixtures is primarily due to the low content of methane itself, which varies significantly depending on the type of coal or concentration. This paper discusses the concept of a co-production system that mixes low-methane methane-air mixtures and biogas to generate power. Methods: Analysis of the possible volumes of utilized methane, biogas requirements and the suitability of the primary feedstock for co-generation of heat and electricity. Selection of appropriate parameters for the processes of utilization of mine methane. Analysis of the merits of the proposed method of utilization of lean coal mine methane. Results: It is recommended that biogas produced by agriculture and forestry in the vicinity of the mines be added to the dry methane stream to obtain the necessary gas concentration for electricity generation. Potential electricity production and greenhouse gas emission reductions have also been evaluated. The result shows that the co-production system can significantly improve the efficiency of poor methane-air mixtures in coal mines. Practical significance: The joint use of lean methane and biogas from straw offers practical advantages both economically, ensuring sufficient energy supply in mines, and as a foundation for broad future prospects. It allows for energy cost reduction and environmental pollution reduction, such as decreasing carbon dioxide emissions.
Temple Buildings Made of Prefabricated Block Modules in Seismically Active Areas of Siberia and the Far East on the Example of the Trans-Baikal Region
Authors: Tret'yakova Elena
Published: September 2023

Purpose: To investigate the issues of the spread of Orthodox churches in remote areas of Siberia and the Far East. Questions of the use of block-modular structures in religious buildings in the conditions of seismic activity of the regions of Transbaikalia and the Far East, in particular, in the Trans-Baikal region. Methods: To analyze the canonical types of temples, their planning and volumetric-compositional solutions that have become widespread in the modern Orthodox architecture of the Russian Federation. To analyze the architectural features of modern Orthodox churches built at the beginning of the XXI century in different cities of the Russian Federation, which form the image of modern Orthodox domestic architecture by using non-traditional elements. To consider the influence of various factors on the formation of the image of modern Russian Orthodox churches. To analyze the role of traditions in the modern architecture of religious buildings. To determine the main directions of development of the construction of religious buildings. To conduct a study of the features of earthquakes in the designated region over the past 70 years. To analyze the current seismic conditions of the Trans-Baikal region. To conduct a study of the typology of temples that are possible for use in the Trans-Baikal region. To analyze the possibility of application and features of block-modular buildings made of various materials. To assess the degree of their possible modern implementation in the studied remote areas of Siberia and the Far East, especially in the territory of the Trans-Baikal region. Results: The main types of temples that are historically and climatically preferable for these areas are identified; various materials for the construction of temple buildings are presented, types of blocks made of logs are proposed, as well as types of blocks in frame design as the main standard block-modular structures for prefabricated religious buildings. Practical significance: It is shown that the use of block-modular structures as the main ones for the construction of buildings in areas remote from the centers allows solving the problem of the lack of Orthodox religious buildings in the region, significantly reducing the construction time of religious buildings and ensuring their seismic stability.
Analysis of Greenhouse Gas Emissions in BRICS and Ways to Reduce Emissions from Rail Transport
Authors: Ahtyamov Rasul , Makarova Elena , Gavrilova Alina
Published: September 2023

Purpose: To analyze greenhouse gas emissions from the BRICS countries, as well as ways to reduce emissions from rail transport. Methods: The contribution of the BRICS countries to global greenhouse gas emissions based on an array of statistical data for the period from 1990 to 2019 has been estimated. The value of CO2 emissions per unit of energy produced in the BRICS countries from 1965 to 2021, as well as the sources of CO2 emissions, have been determined. Results: It is shown that the most effective way to combat climate change is to directly reduce emissions. In general, the emissions of the railway industry depend on the level of electrification. However, when assessing not only direct but also indirect emissions, the energy source and its carbon footprint become of primary importance. The development of intermodal transportation in BRICS countries is significant because these routes have the potential to reduce emissions. Carbon regulation leads to a redistribution in the sphere of international freight transportation among BRICS countries. Competitive advantages are increasingly evident in the railway transportation sector. However, this effect depends on the measures taken to adapt to changes in the transportation market by other modes of transportation. Practical significance: Ways to improve the sustainability of transport infrastructure have been formulated. The lowcarbon transport industry in the BRICS countries can be seen as an important component in reducing gross greenhouse gas emissions given the current high level of reliance on fossil carbon fuels and the inertia driven by the long life of fossil fuel infrastructure. Without the use of negative emission technologies, the required costs for reducing greenhouse gas emissions can be 40 % higher than with the use of negative emission technologies. As part of the reduction of greenhouse gas emissions by railway transport facilities in the BRICS countries, the following measures can be implemented: direct reduction of greenhouse gas emissions; introduction and implementation of technologies for negative emissions at railway transport facilities, taking into account their geospatial distribution and their specific characteristics; attracting investments and ensuring access to more affordable financing for these projects; integration of climate change mitigation issues into the strategies of transportation companies; further electrification in transportation and transitioning to alternative fuel sources; utilization of digital technologies to optimize transportation systems and reduce the environmental impact of the railway industry.
Features of Soil Contamination on the Airport Territory Revealed Through Engineering and Environmental Survey
Authors: Suvorova Ol'ga , Solov'eva Valentina , Abu-Hasan Mahmud , Harlamova Alina
Published: September 2023

Purpose: To study soil contamination specifics based on the results of engineering and environmental surveys conducted during the airport reconstruction. Detection of toxicants in soil samples during field research on the airport grounds based on the analysis of chemical, bacteriological, parasitological, and toxicological parameters of the samples. The assessment of soil quality compliance with the requirements of sanitary rules and norms ‘Hygienic Standards and Requirements for Ensuring the Safety and (or) Harmlessness of Environmental Factors for Human Habitation’ (SanPiN 1.2.3685—21). Methods: Determination of concentrations of pollutants has been carried out in layers at depths of 0.0–0.2 m; 0.2–1.0 m; 1,0–2,0; 2,0–3,0; 3,0–4,0; 4,0–5,0; 5,0–6,0; 6,0– 7.0; 7.0–8.0 m. The soil samples have been analyzed for the following parameters: heavy metal content (lead, cadmium, zinc, copper, nickel, mercury, arsenic); pH value; content of organic toxicants (polycyclic aromatic hydrocarbons (benzo[a]pyrene); petroleum products); toxicological indicators of the soil throughout the depth (composite sample) (0.0–2.0 meters) (2 test objects: Escherichia coli and Paramecium caudatum). Results: Discrepancies with hygiene requirements for the content of the following chemical substances in soil have been identified: zinc, copper, cadmium, lead, nickel, and petroleum products. The dangerous category of soil has been mostly observed in the surface layer of soil (0.0–0.2 m) and at a depth of 0.2–1.0 m, however, excess soil contamination has also been detected at depths of 2.0–3.0 m and 4.0–5.0 m, and excess soil contamination with nickel has been observed at all horizons up to a depth of 8.0 m. Based on microbiological and parasitological indicators, all samples are classified as “clean”. Practical significance: An analysis of soil contamination levels has been conducted on the territory of the airport in the Tyumen region. Concentrations of ecotoxicants in the soil have been examined, and possible reasons for exceeding the permissible levels of pollutants have been analyzed. Based on the results of the analysis of possible reasons for exceeding the permissible content of pollutants in the soil, the need for measures to protect the soil from further pollutants has been established.
Hydrological Conditions for the Formation of Phytocenoses on Reclaimed Colliery Spoil Heaps
Authors: Harlamova Alina , Haritonenko Aleksandr , Solov'eva Valentina , Suvorova Ol'ga
Published: September 2023

Purpose: Study of the hydrological conditions for the formation of phytocenoses on reclaimed colliery spoil heaps. The state of the formed phytocenosis on the surface of the reclaimed colliery spoil heap has been studied. Experiments have been carried out in field conditions to determine the permeability of the spoil material of the reclaimed spoil heap. The influence of hydrological conditions on the formation of phytocenoses in quasinatural landscapes is analyzed. Methods: Analysis of the state of the phytocenosis of the reclaimed spoil heap with the determination of the water permeability of the spoil material. Results: It has been established that the productivity of phytocenoses on reclaimed spoil heaps of coal mines directly depends on the hydrological properties of the formed soils, and is more effective in areas where the process of soil formation is almost completed. Practical significance: It is shown that the most favorable hydrological conditions on the surface of the reclaimed colliery spoil heaps contribute to the formation of phytocenoses at the level of natural landscapes.
Teacher Perceptions of Making Interactive Questions Using the Quizizz Application In Physics Learning
Authors: Herliana Fitria , Yusrizal Yusrizal , Mahsum E , Rizal S , Musdar Musdar
Published: September 2023

This study aims to see teacher perceptions of making interactive questions using the Quizizz application. This research was carried out using a training approach, which was carried out for 2 days and added with independent assignments. The sample used was 21 people, with the sampling technique using random sampling. Data collection using a 4-point Likert scale questionnaire consisting of 12 items was carried out at the beginning of the activity and after training—data analysis using descriptive and inferential statistics. The results showed that Science Teachers (Physics) in junior and senior high schools in Sabang City had a perception of the Quizizz application in learning 86.31%, which was classified as very good. Teacher perceptions of knowledge related to Quizizz applications in learning amounted to 84.82%, classified as good. Teacher perceptions of skills in using the Quizizz application in education amounted to 83.04%, classified as good. Teacher perceptions of attitudes towards using the Quzizz application in learning amounted to 91.07%, classified as very good. Teachers have a positive perception of being able to apply this Quizizz application in education because teachers have been equipped with the knowledge and skills gained in training activities, and teachers have a positive attitude towards using this application in the learning process.
Analysis of PhET Virtual Laboratory in Nuclear Physics Course at Physics Education
Authors: Lutfiani Silvia , Husna Takiah Iis Hisna , Herdhiyatma Sean Resha , Mahmudah Ifa Rifaatul
Published: September 2023

In the introductory physics course, conducting experiments and learning topics that seem abstract using a PhET virtual laboratory is necessary. With several previous research results showing that PhET has benefits in learning activities, this study aims to find out Physics Education students related to the usefulness of the PhET virtual laboratory in the introductory alpha decay Nuclear physics course. This research is a quantitative descriptive technique with the research variable of the Colorado PhET virtual laboratory in the Introduction to Nuclear Physics course on alpha decay material. The data collection technique is through a questionnaire method using a Likert scale of five answer choices marked by giving a negative to positive score. The population of the survey is all students of physical education, which is 79 people. However, only 71 people filled out the questionnaire. Characteristics of students who are 21 years old on average with computer/laptop skills on average 81%, interest in introductory physics courses as much as 77%, interest in practicum as much as 86%, and interest in learning topics as much as 61% it can be said that the laboratory virtual PhET is helpful in the learning process of the introductory alpha decay Nuclear physics course with a proportion of 86% of PhET virtual laboratories can help the learning process, 81% of PhET virtual laboratories are the preferred learning method, 80% of PhET virtual laboratories are engaging learning, 81% virtual laboratories PhET can be done independently, and 79.99% use of the virtual laboratory application is easy to use.
Perfil epidemiológico de los pacientes con secuelas de accidente cerebrovascular atendidos en un instituto de rehabilitación de Lima-Perú
Authors: Urcia-Fernández Fernando , Cam-Chiock Diana
Published: September 2023

Objetivo: Describir el perfil epidemiológico de los pacientes con secuelas de accidente cerebrovascular (ACV) atendidos en un instituto de rehabilitación de Lima-Perú. Material y métodos: Estudio observacional, transversal, descriptivo y relacional, de los pacientes con secuelas de ACV atendidos en el periodo 2013 al 2019, en el Instituto Nacional de Rehabilitación “Dra. Adriana Rebaza Flores” AMISTAD PERÚ-JAPÓN. Se recolectaron datos de variables sociodemográficas, clínicas, enfermedades crónicas, hábitos nocivos y medicamentos. Resultados: El 71,5% de pacientes tenían secuelas de ACV de etiología isquémica y el 87,6% secuelas moderadas o severas. La mayor frecuencia de pacientes con secuela de ACV isquémico fue a partir de los 56 años (80,7%); mientras que en el ACV hemorrágico fue a partir de los 46 años (61,8%). El 81,7% presentó hemiplejía, el 58% deficiencia en la comunicación y solo el 2,1% en la audición, el 67,3% hipertensión arterial y el 16,1% refirió algún grado de consumo de tabaco. La mayoría de los pacientes con secuelas leves, moderadas y severas eran casados o convivientes. A mayor severidad, era mayor el porcentaje de mujeres, personas mayores e iletradas. Conclusiones: La mayoría de los pacientes con ACV tenían secuelas moderadas o graves, hemiplejía, deficiencia de la comunicación e hipertensión. Los pacientes con ACV isquémico tenían mayor edad que aquellos con ACV hemorrágico. A mayor severidad, había mayor porcentaje de personas mayores, mujeres e iletrados.
Efecto de la hemodiálisis de alto flujo en la dosis de eritropoyetina en pacientes con enfermedad renal crónica
Authors: Aguilar-Rodríguez Ana , Hinostroza-Yanahuaya Julie , Lopera-Quintanilla María T.
Published: September 2023

Objetivo: Evaluar el requerimiento de eritropoyetina (EPO) tras el cambio de membrana de bajo a alto flujo en pacientes prevalentes en hemodiálisis. Secundariamente determinar la variación de β2-microglobulina, Proteína C reactiva (PCR) y ferritina. Material y métodos: Estudio retrospectivo observacional en pacientes prevalentes en hemodiálisis en dos centros de diálisis en Perú. Se determinaron las características clínicas y demográficas de los pacientes. Se determinó hemoglobina, porcentaje de saturación de transferrina, ferritina, Kt/V y dosis de EPO basal y cada 3 meses durante los 12 meses posteriores al cambio de dializador. Adicionalmente se determinó la PCR y β2-microglobulina a los 3, 6 y 12 meses.  Resultados: Se incluyeron 58 pacientes que cumplieron con los criterios de inclusión y exclusión. La dosis de EPO basal fue 5 763,55 ± 3 000,69 UI/semana y a los 12 meses, 4031,18 ± 2 663,95 UI/semana (p=0,000) y la hemoglobina basal 11,10 ± 1,24 g/dl y a los 12 meses 11,69 ± 1,28 g/dl (p=0, 077). La β2-microglobulina disminuyó de 45,64 ± 11,39 mg/l a 26,26 ± 8,02 mg/l a los 12 meses (p=0,000). Conclusiones: En la población de estudio la dosis de EPO disminuyó 30% a los 12 meses sin cambios en la hemoglobina. La β2-microglobulina disminuyó 42,5% al año.
Condicionantes para la participación laboral de las personas con discapacidad por lesión medular atendidas en un instituto especializado de rehabilitación
Authors: Casallo Castilla Carmen Natividad
Published: September 2023

Objetivo: Determinar los factores condicionantes para la participación laboral de las personas con discapacidad por lesión medular de un instituto especializado de rehabilitación. Material y métodos: Estudio observacional, retrospectivo y relacional; se incluyeron 224 pacientes con lesión medular del Departamento de Investigación, Docencia, y Atención en Ayuda al Tratamiento del Servicio de Rehabilitación Profesional que fueron atendidos en el periodo 2016 al 2019. Se recolectaron variables clínicas, sociodemográficas y contextuales; y la actividad económica antes y después de la lesión. Resultados: El 65 % de pacientes fueron del sexo masculino, de edad media de 38,61 ± 13,33; según el nivel de lesión medular el 85,3% de pacientes tenía paraplejia, el 62,5% con grado de lesión en la escala ASIA A; el tiempo de evolución fue de más de 1 año 30,4%, estado civil soltero 52,2%, de procedencia Lima y provincias el 51,3%, con grado de instrucción de secundaria 50,9%, nivel socioeconómico de pobreza extrema en 61%. Se encontró diferencia significativa entre la participación laboral antes de la LM y el sexo (p<0,01) y la condición laboral (p<0,0069). La participación laboral después de la LM tuvo una diferencia significativa con el nivel socioeconómico (p<0.005) y el grado de lesión en la escala ASIA (p<0,014). El análisis de regresión logística mostró que el único factor asociado con la participación laboral fue el tiempo transcurrido de la lesión medular (p=0,039; OR=19,9).  Conclusiones: Los pacientes con LM con menores ingresos económicos ubicados en grupos de pobreza pobre extremo y no extremo tuvieron mayor participación laboral; así como los que tuvieron un mayor grado de lesión en la escala ASIA.  Asimismo, el único factor predictor de la participación laboral fue el tiempo transcurrido desde la lesión.
AI in colonoscopy - detection and characterisation of malignant polyps
Authors: Shakir Taner , Kader Rawen , Bhan Chetan , Chand Manish
Published: September 2023

The medical technological revolution has transformed the nature with which we deliver care. Adjuncts such as artificial intelligence and machine learning have underpinned this. The applications to the field of endoscopy are numerous. Malignant polyps represent a significant diagnostic dilemma as they lie in an area in which mischaracterisation may mean the difference between an endoscopic procedure and a formal bowel resection. This has implications for patients’ oncological outcomes, morbidity and mortality, especially if post-procedure histopathology upstages disease. We have made significant strides with the applications of artificial intelligence to colonoscopic detection. Deep learning algorithms are able to be created from video and image databases. These have been applied to traditional, human-derived, classification methods, such as Paris or Kudo, with up to 93% accuracy. Furthermore, multimodal characterisation systems have been developed, which also factor in patient demographics and colonic location to provide an estimation of invasion and endoscopic resectability with over 90% accuracy. Although the technology is still evolving, and the lack of high-quality randomised controlled trials limits clinical usability, there is an exciting horizon upon us for artificial intelligence-augmented endoscopy.
Terör Örgütlerinde Öğrenme Ve Değişim: Pkk Örneği
Authors: FAYGANOĞLU Koruhan , FAYGANOĞLU Pınar
Published: September 2023

Bu araştırmanın amacı, PKK terör örgütünün, değişen çevresel koşullara eylemlerini ve içyapılarına etkili bir şekilde adapte edebilen örgütler olarak nitelendirilen, öğrenen örgüt özellikleri taşıyıp taşımadığı sorusuna yanıt aramaktır.
Meningkatkan Kemampuan Apresiasi Tari Traditional Dengan Model Pembelajaran Case Based Learning
Authors: Prihanita Kusuma Wardani  , Ojang Cahyadi  , Elindra Yetti
Published: September 2023

Tari Tradisional merupakan salah satu kesenian yang harus  dilestarikan, dalam mempelajari kesenian, terdapat nilai nilai sosial budaya, moral, dan nilai keindahan yang patut untuk diapresiasikan. Tari tradisional menjadi penting untuk diapresiasi karena selain mengandung nilai keindahan, didalamnya juga mengandung nilai kesehatan, pesan moral, cerita, serta nasihat. Kemampuan apresiasi sangat penting dimiliki oleh peserta didik supaya dapat meningkatkan rasa ingin melestarikan dan bangga akan kebudayaannya. Penelitian ini bertujuan untuk meningkatkan kemampuan apresiasi siswa terhadap tari tradisional melalui penerapan model pembelajaran case based learning. Penelitian ini merupakan penelitian tindakan kelas dengan model Kemmis dan Mc Taggart, menggunakan analisis kuantitatif statistik dan kualitatif deskriptif. Teknik pengumpulan data melalui observasi, wawancara, tes dan dokumentasi pada siswa kelas X IPA 6 SMA Negeri 2 Depok. Penelitian ini dilakukan dalam II siklus sejumlah 38 siswa, pengambilan data dilakukan pada Siklus I dan Siklus II. Hasil dari penelitian ini terlihat adanya peningkatan pada data pra siklus dengan rata rata 69,7 dan meningkat pada siklus I dengan rata rata  75,3  dan meningkat pada  siklus II dengan rata rata 89,32 dengan ketuntasan pada siklus I sebesar 50% dan siklus 2 sebesar 99%, yang berarti terdapat peningkatan terhadap hasil proses pembelajaran apresiasi tari tradisional dengan model pembelajaran case based learning.
Design and Implementation of a National Program to Monitor the Prevalence of SARS-CoV-2 IgG Antibodies in England Using Self-Testing: The REACT-2 Study
Authors: Ward Helen , Atchison Christina , Whitaker Matthew , Davies Bethan , Ashby Deborah , Darzi Ara , Chadeau-Hyam Marc , Riley Steven , Donnelly Christl A. , Barclay Wendy , Cooke Graham S. , Elliott Paul
Published: September 2023

Data System. The UK Department of Health and Social Care funded the REal-time Assessment of Community Transmission-2 (REACT-2) study to estimate community prevalence of SARS-CoV-2 IgG (immunoglobulin G) antibodies in England.

Data Collection/Processing. We obtained random cross-sectional samples of adults from the National Health Service (NHS) patient list (near-universal coverage). We sent participants a lateral flow immunoassay (LFIA) self-test, and they reported the result online. Overall, 905 991 tests were performed (28.9% response) over 6 rounds of data collection (June 2020–May 2021).

Data Analysis/Dissemination. We produced weighted estimates of LFIA test positivity (validated against neutralizing antibodies), adjusted for test performance, at local, regional, and national levels and by age, sex, and ethnic group and area-level deprivation score. In each round, fieldwork occurred over 2 weeks, with results reported to policymakers the following week. We disseminated results as preprints and peer-reviewed journal publications.

Public Health Implications. REACT-2 estimated the scale and variation in antibody prevalence over time. Community self-testing and -reporting produced rapid insights into the changing course of the pandemic and the impact of vaccine rollout, with implications for future surveillance. (Am J Public Health. 2023;113(11):1201–1209. https://doi.org/10.2105/AJPH.2023.307381 )
One World Surgery
Authors: Overman Kelsey , Nicholson Peter , Nunziato Carl , Antunez Merlin , Daly Peter , Forseth Michael
Published: September 2023

One World Surgery (OWS) is a medical mission organization that treats a variety of orthopaedic conditions and focuses on local partnerships, education, capacity-building, and high-quality care. OWS runs a Honduran ambulatory surgery center (ASC) with >50 full-time local staff; it operates year-round and accommodates visiting surgical teams bimonthly. Across its 12-year history, 8,703 surgical procedures have been performed and 54,940 total consults have been completed, with increasing autonomy of the local medical staff. From 2009 through 2021, OWS has provided 74 million U.S. dollars in surgical and consult patient care. By addressing global surgical disparities via life-enhancing surgical care in low- and middle-income country (LMIC) settings, the OWS ASC mission model may be a useful blueprint for other medical missions.
Bentuk Emosi Pada Album Lagu “Riuh” Karya Feby Putri Sebagai Individu Dewasa Awal (Kajian Psikologi Sastra)
Authors: Rahayu Erny , Setyawan Arief
Published: September 2023

Early adult individuals are aged 20-40 years who are looking for identity. This age is an age with unstable emotions because of the various life processes they live. One of the emotions in this early adult individual is reflected in the ten songs in the album "Riuh" by Feby Putri which is the object of this study. This study uses the psychological study of literary works by exploring the psychological theory of literary works and conducting an analysis of the literary works that are the object of research. The purpose of this study is to describe the form of emotion in the album song "Riuh" by Feby Putri as an early adult individual (study of literary psychology). This study uses David Krech's emotional theory which consists of basic emotions, emotions related to sensor stimulation, emotions related to self- assessment, and emotions related to other people. This study uses a qualitative descriptive approach with data analysis techniques in the form of data reduction, data presentation, and drawing conclusions
A dinâmica educacional na comunidade do Monte Serrat
Authors: Andrade Jaqueline , Santiago Alina Gonçalves
Published: September 2023

O processo socioeducativo tem-se firmado na atuação escolar e da família. No entanto, esses processos vão muito além da educação formal. Não é por acaso que eles se valem de outras dimensões, pois a formação cidadã transborda os limites dos muros da escola, ela acontece na cidade e pela cidade. Assim, a cidade torna-se um agente educador capaz de incorporar todas as dimensões educacionais. A comunidade do Monte Serrat em Florianópolis, carrega em seu percurso histórico práticas educacionais capazes de elucidar o potencial do território no processo de formação cidadã. Com isso o presente artigo busca analisar como as dimensões formal, não formal e informal da educação contribuem no processo formativo do cidadão na Comunidade do Monte Serrat. Para isso, é necessário entender o texto e o contexto territorial da comunidade; verificar a articulação das três dimensões da educação com o território; e, identificar os elementos da cidade que contribuem no processo de formação cidadã. Por meio de uma abordagem multimétodos, busca-se investigar as relações das dimensões educacionais bem como as potencialidades e as limitações no território. Na compreensão das três dimensões da educação é possível reconhecer as potencialidades da cidade na construção da cidadania, em especial diante da pedagogia freiriana do inédito-viável revelando a sensibilidade ao apreender os sujeitos, fazer reconhecer-se como sujeitos, fomentá-lo a compreender o outro e o seu contexto e com isso esperançá-lo a buscar ser o que quiser ser.
CFD-DEM Approach to Study the Proppant Transport and Placement under Different Perforation Conditions in Tortuous Hydraulic Fractures
Authors: Li Jun , Kuang Shibo , Huang Fayuan , Liu Pingli
Published: September 2023

Hydraulic fracturing technology is widely used to extract unconventional and conventional gas/oil reservoirs. However, the distribution and packing pattern of the proppant remain as significant concerns in hydraulic fracturing, because they help enhance unconventional reservoir production by optimizing operational parameters. Previous studies focused on the proppant transport mechanism with critical factors, such as the perforation condition (perforation properties), in a straight fracture model, but the simplified fracture shape cannot generate enough actual results because the fracture is tortuous after shear displacement. As a result, there is a need to further study the effect of perforation conditions on proppant transport and distribution in tortuous fractures. The aim of this study is to present a combined numerical approach using computational fluid dynamics (CFD) and discrete element method (DEM) to simulate the fluid phase and proppant behavior, respectively. The CFD-DEM model was validated against the experimental results and found to be suitable for predicting proppant transport and distribution with different perforation conditions. The main conclusions are summarized as follows: (1) In various degrees of the tortuous fracture model, the final proppant packing shape was overall quadrilateral under the top- and middle-perforation injection modes. On the contrary, the proppant packing shape was triangular under bottom-perforation injection mode, resulting in a low dune height near the perforation. Furthermore, the final packing patterns changed from double-peaked stack to sole-peaked stack due to the injection mode changing to multiple-perforation injection mode. (2) In the tortuous fracture model, the bottom-perforation injection and multiple-perforation injection mode strategies should be applied first to improve the proppant transport efficiency.
Epigenetic insights into neuropsychiatric and cognitive symptoms in Parkinson's disease: A DNA co-methylation network analysis
Authors: Lunnon Katie , Harvey Joshua , Smith Adam , Weymouth Luke , Smith Rebecca , Castanho Isabel , Hubbard Leon , Creese Byron , Bresner Kate , Williams Nigel , Pishva Ehsan
Published: September 2023

Parkinson’s disease is a highly heterogeneous disorder, encompassing a complex spectrum of clinical presentation including motor, sleep, cognitive and neuropsychiatric symptoms. We aimed to investigate genome-wide DNA methylation networks in post-mortem Parkinson’s disease brain samples and test for region-specific association with common neuropsychiatric and cognitive symptoms. Of traits tested, we identify a co-methylation module in the substantia nigra with significant correlation to depressive symptoms and with ontological enrichment for terms relevant to neuronal and synaptic processes. Notably, expression of the genes annotated to the methylation loci present within this module are found to be significantly enriched in neuronal subtypes within the substantia nigra. These findings highlight the potential involvement of neuronal-specific changes within the substantia nigra with regard to depressive symptoms in Parkinson’s disease.
Actuation performance of a microstructure with spin-current volume effect
Authors: Ono Takahito , Huang Yi-Te , Suzuki Kenta , Arisawa Hiroki , Kikkawa Takashi , Saitoh Eiji
Published: September 2023

In this work, the actuation of micromechanical structures based on spin-current volume effect (SVE) using an amorphous magnetic film of Tb20Fe24Co56 (TFC) with volume magnetostriction (VM) is demonstrated, and the actuation performances are evaluated. A 2 mm-diameter circular polyimide diaphragm coated with thin TFC/non-magnetic metal (NM) films is prepared as the micromechanical structure, and Pt, Cu, and W are used as the NM film. When an AC charge current flows through the TFC/NM film on the diaphragm under an external magnetic field in the diaphragm plane and orthogonal to the charge current, an AC spin-current flows in the NM film due to the spin-Hall effect. In the SVE, the spin-current transports angular momentum from the NM to TFC films, which modulates the magnetization fluctuation of the TFC film due to the spin-transfer torque, causing the volume modulation based on spin-lattice coupling. Thus, this SVE can induce the mechanical actuation of micromechanical structures. The force generated by the SVE actuation is evaluated from the mechanical resonance of the diaphragm, and it is found that the power density of the diaphragm actuator with the TFC/Pt films is larger than 1.17×106 W/m3 at 20 mA peak-to-peak AC current under 0.72 T magnetic field. This SVE is effective as a new actuation mechanism for microsystems.
Characteristics of Posterior Precortical Vitreous Pockets Visualized by Swept-Source OCT and en face OCT
Authors: Du Liping , An guangqi , Zhang Min , Lei Bo , Xin Xiaoyu , liu pei , Zhao Yu , Chen Haoxiang , Jin Xuemin
Published: September 2023

Purpose
To determine the characteristics of posterior precortical vitreous pockets (PPVPs) and to observe vitreous changes in myopic eyes by swept-source optical coherence tomography (SS-OCT) and en face imaging in a cohort of the Chinese Han population.
Methods
This was a cross-sectional study. Volunteers (235 participants, 374 eyes) received an SS-OCT examination. The heights and widths of the PPVPs were measured by SS-OCT. The area of the PPVPs was measured en face. The relationships between PPVP size and sex, age, axial length (AL) and spherical equivalent (SE) were evaluated.
Results
The mean width and height were 6711.64 ± 1241.87 µm and 662.47 ± 326.39 µm, respectively. The area of the PPVPs was 30.296 ± 9.114 mm2. Boat-shaped, oval, and hook-shaped PPVPs were observed in 73.26%, 21.12%, and 5.62% of all eyes, respectively; 73.53% of all PPVPs had channels communicating with Cloquet’s tubes. There was a significant difference in the PPVP width among the different age groups (F = 7.76, P = 0.002). Age had a positive correlation with the PPVP width (r = 0.526, P = 0.001). The PPVP height showed significant differences among the different age groups (F = 3.098, P = 0.027). However, there were no correlations between the AL and the PPVP width or height (P = 0.280; P = 0.328, P = 0.057, respectively).
Conclusions
Age and myopia affect the size of PPVPs. SS-OCT greatly facilitates visualization of the complex structure of the vitreous.
Brief Summary Statement:
Characteristics of PPVPs