bluuebunny/crossref_metadata_2025 huggingface dataset:
OF RECONSTRUCTIVE SURGERY IN PATIENTS WITH COLOSTOMY
Authors: Boyko V. V. , Yevtushenko D. O. , Nemenko S. O. , Fursov I. G.
Published: October 2022

Abstract. Literature data on the results of reconstructive surgery in patients with previously imposed colostomy were analyzed. Colostomy application varies from 7 to 63 %. Failure of the seams of the intestinal anastomoses remains a topical issue of abdominal surgery. The incidence of such complications, according to various authors, reaches 3.8–14.6 % — in operations on the colon. The issue of restoring the integrity of the large intestine is quite relevant for colorectal surgery, colostomy varies from 7 to 63 %. Despite the improvement of existing and development of new methods of reconstructive surgery, the active use of intraoperative and postoperative diagnostic methods, it is not possible to completely avoid complications. The incidence of failure of the sutures of colonic anastomoses reaches 3.8–14.6 %. Further study and development of methods of reconstructive surgery after colostomy is needed to minimize the number of postoperative complications and improve the treatment outcomes of patients with colorectal pathology.
COMPARISON OF THE RESULTS OF RADIOFREQUENCY ABLATION AND PHLEBECTOMY OF SUPRAFASCIAL SEGMENTS OF THE GREAT SAPHENOUS VEIN IN PATIENTS WITH VARICOSE DISEASE OF THE LOWER EXTREMITIES
Authors: Pertsov V. I. , Mamunchak O. V.
Published: October 2022

Summary. Introduction. Over the past two decades, such traditional surgical procedures as crossectomy and stripping have been replaced to a greater or lesser extent by less invasive endovenous methods. Unfortunately, endovenous ablation methods do not allow to completely exclude such complications as: hyperpigmentation, paresthesias, hematomas, thermal damage to the skin.

Purpose.To improve the tactics and improve the cosmetic effect of surgical treatment of superficially located suprafascial segments of the great saphenous vein in patients with varicose veins of the lower extremities.

Materials and methods. An analysis of the treatment of 107 patients with VDLE at the University Clinic of ZDMU in 2019-2021 was carried out. The first (main) group – 65 (60.75 %) patients – received surgical treatment according to the proposed method – RFA, miniphlebectomy of the suprafascially located main trunk, miniphlebectomy of the tributaries along the Varada. The second (comparison) group – 42 (39.25 %) patients – received standard treatment – RFA of the GSV trunk, miniphlebectomy.

Research results. According to the control duplex scan in all patients, the deep vein passage was occluded in 106 (99.1 %) patients.

The overall frequency of postoperative complications in the main group was 18.4 % (12 out of 65 patients), in the comparison group – 35.7 % (15 out of 42 patients, mainly due to hyperpigmentation) and was significantly different (р ˃ 0.05).

According to the data of CIVIQ-2, the proposed method of surgical intervention made it possible to improve the quality of life from (31.72 ± 1.56) points in patients of the comparison group to (27.49 ± 1.45) in patients of the main group.

Conclusions. The proposed tactic of surgical correction of the varicosity of the trunk of the GSV – RFA of the intrafascial area of the GSV plus miniphlebectomy of the suprafascial segment – allows to reduce the probability of the development of hyperpigmentation, which contributes to a better cosmetic effect, subjective satisfaction of patients with the results of the operation, and a better quality of life in patients with VDLE.
COMBINATION OF THE MULTIMODAL ALGORITHM AND THE RECONSTRUCTIVE-RESTORATIVE LADDER IN THE TREATMENT OF THE WOUNDED WITH FLAMMABLE DEFECTS SOFT FABRIC
Authors: Lurin I. A. , Khomenko I. P. , Negoduyko V. V. , Tertyshnyi S. V.
Published: October 2022

Resume. Most wounds formed as a result of a gunshot wound require staged, and in some cases, multistage reconstructive and restorative operations and rehabilitation.

Materials and methods. During treatment at the Military Medical Center of the Republic of Poland for 6 months (from 24.02.22 to 10.09.22), reconstructive and surgical treatment of 54 wounded soldiers was carried out using the principles of reconstructive and plastic surgery. The treatment process was based on a multimodal approach - dynamic screening of gunshot wounds with soft tissue defects, which was used in the pre-, intra- and postoperative periods.

Results and their discussion. A total of 54 wounded people were included in the study. Methods of closure that were used during the recovery process: spontaneous epithelization — 3 (5.6 %) of the injured, secondary sutures — 10 (18.5 %), PHO with the use of a split skin flap - 12 (22.2 %), sliding flaps – 12 (22.2 %), propeller flaps – 17 (31.5 %). When using full-layer flaps (sliding, propeller) in wounded patients, inflammatory complications were not observed in the postoperative period, but the phenomena of venous stasis, marginal necrosis of the distal part of the flap were noted. The average number of postoperative bed days before independent movement or self-care was 7.5 days. The aesthetic component in wounded patients with the use of flaps increased by 1.8 times compared to the RSK technique.The functional component was restored in 35 % during further observation.

Conclusions. As the experience of the VHP in previous military conflicts has shown, primary closure of a gunshot wound is not possible, and in some cases even harmful. Therefore, in our opinion, the preparation of a gunshot defect of soft tissues, based on multimodal monitoring, can be considered as a bright addition to the reconstructive-plastic ladder. Performing reconstructive and plastic closure of gunshot wounds with propeller flaps is an actual method of restoring the damaged anatomical area, which allowed to obtain better aesthetic, as well as anatomical and functional results, in some cases - without additional wound surfaces (places for the collection of RAS).
Visual Attentional Pattern of the Eyewitness in a Mock Crime with Weapon Presence
Authors:   The Korean Data Analysis Society, Lee San Ho , Lee Chankyu , Lee Gi-Eun , Lee Jang-Han
Published: October 2022

The weapon focus effect is defined as eyewitnesses focus more on weapons than other details(e.g., perpetrator) of the crime scene which cause memory bias. The present study investigated how the presence of a weapon affects the visual attention and memory of the eyewitness. Participants were randomized within two groups: the weapon focus effect condition(WC) and the novelty condition(NC). The participants' visual attention pattern(dwell time) was measured while participants were observing the interaction between the two individuals(clerk and customer) at the mock crime slide show. At the end of the experiment, the participants were asked about what they saw on the slide show. As a result, it was confirmed that the weapon condition showed a different attention pattern from those in the non-weapon condition. Overall, both groups were found to spend more time on target objects(knife/cashier's check), but WC participants spent longer time on clerks when weapons were presented than NC participants. On the other hand, in both groups, there was no difference in memory. This study provided evidence for the visual attention patterns of eyewitnesses at simulated crime scenes with weapons.
Bayesian Penalized Splines for Predicting Concentrations of Soil Contaminant*
Authors:   The Korean Data Analysis Society, Ryu Taekseon , Na Jonghyun , Kim Joonmyoung , Yoon Taehyun , Lee Jeongho , Kim Han-Suk , Kwon Manjae , Joo Yongsung
Published: October 2022

For the diagnosis of soil contamination, it is necessary to accurately understand the distribution of pollutants in the soil of the survey site. However, since it is practically impossible to investigate all observable points in the survey site, the concentration of pollutants in the soil of the survey site is predicted through a spatial prediction model based on data obtained from some selected points in the survey site. However, due to the nature of the soil data, the size of the data is often insufficient, which can greatly reduce the accuracy of spatial prediction. Therefore, in this study, to solve this problem, we propose a Bayesian penalized spline model that predicts the concentration of contaminants in the soil of the survey site by using the soil quality monitoring network data provided by the Ministry of Environment(MOE) in Korea as prior information. In addition, in order to evaluate the performance of the proposed model, RMSE, MAE, MAPE were used to compare the prediction accuracy by data size with several comparative models. As a result of the performance evaluation, it was confirmed that the performance of the proposed model showed better performance than the comparative models. In particular, the smaller the data size, the better the performance of the proposed model compared to the comparative models. Therefore, the use of the proposed model can be considered when trying to understand the distribution of pollutants in the soil at the initial stage of soil survey, where soil data for the survey site is relatively scarce.
Effects of customer value co-creation behavior on customer experience and customer loyalty
Authors:   The Korean Data Analysis Society, Oh Mi-Ok , Shin Jong-Kuk
Published: October 2022

This study is to investigate the mechanism that value co-creation customer behavior consisting of customer participation behavior and customer citizenship behavior affects customer loyalty through customer experience. For this purpose, this study classifies customer participation behavior into information sharing and responsible behavior, customer citizenship behavior into feedback and helping, and analyzes the influence of each on economic, hedonic, symbolic, and relational customer experience. And it analyzes the influence of each customer experience on customer loyalty. As a result of analyzing the data collected by allocating 320 consumers who have experience in using retail services by gender and age, information sharing has a positive effect on economic and hedonic customer experience, but does not have a significant effect on symbolic and relational experience, and responsible behavior has a positive effect on economic, hedonic, and symbolic experience, but does not have a significant effect on relational experience. In addition, both the feedback and helping are found to have a positive effect on economic, hedonic, symbolic, and relational experiences. And economic, symbolic, and relational experiences have a positive effect on customer loyalty. Based on the results of the study, implications for establishing customer experience marketing strategies by encouraging value co-creating customer behavior are presented.
Survival prediction of hospitality businesses during the pandemic
Authors:   The Korean Data Analysis Society, Kwon Yujin , Park Sung Y.
Published: October 2022

According to previous studies, it has been studied that the survival of the hospitality business has nothing to do with the financial structure of the company, and mainly depends on geographic location or service. However, in the unprecedented situation with little profit due to the COVID-19, financial strength is necessarily required for hospitality businesses in order to pay fixed costs which is related to survival. This research analyzes the link between financial soundness and survival to explain the hotel industry’s risk due to the COVID-19 crisis, which can lead to a decline in the operating profit, and a similar type of global crisis. This study estimates operating leverage for each cost under the assumption that firms with a relatively high ratio of variable costs to fixed costs can adjust costs more flexibly in response to reduced operating activities, and predicts the failure of the hotel industry with the logit model. As a result, the logit prediction model including growth rate of operating income, capital adequacy ratio, cash-total cost ratio, operating leverage of intermediate input costs, operating leverage of operating expenses, total assets, and the location of the hotel best predicted the firm failure during the 2008 global financial crisis. As a result of predicting the firms that will face corporate failure among the hotel industry in 2021-2022, 24.87% of the observations, a total of 60 hotel businesses, are predicted to face corporate failure.
Factors Affecting Cognitive Function in the Elderly Using Aging Panel Data: Focusing on Demograhics, Psycho-social, Physical, and Health-related Behavioral Characteristics
Authors:   The Korean Data Analysis Society, Baek Wonhee , Kim Doo ree
Published: October 2022

The aim of this study was to identify the factors affecting the cognitive function of the older people. This study was performed a secondary data analysis using the 7th and 8th Korean Longitudinal Study of Aging. As a result of this study, more age(β= -0.24, p< .001); lower education(β= -1.05, p<.001); and more depression(β= -0.26, p<.001) were all significantly associated with a greater risk of cognitive dysfunction. In addition, male sex(β= 0.97, p<.001); having a spouse(β= 0.52, p< .001); more better subjective health status(β = 0.97, p< .001), regular exercise(β= 0.21, p<.001) were all significantly associated with a lower risk of cognitive dysfunction. Moreover, when demographic, psycho-social, physical, and health promotion behaviors were adjusted, the cognitive function of participants who exercised regularly for more than 2 years was higher than those who did not exercise regularly. Therefore, in the future, when developing a cognitive function improvement program for older people, it is thought that it will be necessary to develop a program that considers the type, and intensity of exercise that the subject can exercise continuously.
A study on the asymmetry and non-linear effects of education quality attributes on student satisfaction
Authors:   The Korean Data Analysis Society, Leem Byung-Hak , Eum Seong-Won , Byoun Su-Youn
Published: October 2022

The purpose of this study is to identify which attributes to strengthen and which attributes to improve to improve student satisfaction through asymmetric and non-linear analysis of educational quality attributes. In order to achieve the purpose of this study, an asymmetry analysis was performed on the attributes that affect student satisfaction. For this, PRCA analysis and AIPA(asymmetric impact-performance analysis) were used, and a matrix between IA and attributes was constructed and presented to further suggest strategic directions. Through this analysis, the influence of educational attributes affecting student satisfaction was identified. The analysis results of this study are as follows. First, as a result of PRCA analysis, the major curriculum was classified as a one-dimensional factor, the liberal arts curriculum, non-curricular programs and administrative services were classified as attractive factors, and professor counseling, information system service, and this class were classified as must-be factors. Second, IA and attribute matrix analysis results show that non-curricular programs, liberal arts curriculum, and administrative services are areas for improvement through aggressive investment, and information system, professor counseling, and this class are classified as areas that must be improved first. and the major area was analyzed as an important area as a factor that should further strengthen investment. Lastly, the implication of this study is to provide the priority of allocation of educational resources through the application of AIPA to educational attributes and to classify the attributes that need to be improved first within the educational attribute factors. This will help to efficiently utilize resources and improve student satisfaction.
Evaluation of fruit production, carbon sequestration and economic potential of mangoes (Mangifera indica L.) in degraded lands of Indian Himalaya
Authors: Rathore Avinash Chandra
Published: October 2022

Experiment was conducted on mango at ICAR-Indian Institute of Soil and Water Conservation, Dehradun during 1995-2020. Mango cultivar ‘Mallika’ was the most vigorous and attained maximum plant height (6.80 m), canopy volume (220.25 m3) produced highest fruit yield (90.81 kg tree-1), litter production (5.35 tha-1), fine root production (847.21 g m-2 yr-1) and conserved 10.90 cm moisture in the soil profile upto 1.20 m depth. Whereas the lowest plant height (4.50 m), canopy volume (147.73 m3) in Amrapali cultivar, soil moisture conservation and lowest fruit yield (50.31 kg tree-1) in Ramkela were recorded in 25 years of orchard life and 20 Year of fruiting life of mango. The maximum fruit qualities like fruit weight (g), pulp content (%), totals soluble solids (0Brix), total sugar (%), reducing sugar (%), non-reducing sugar, β carotene (%) in Mallika cultivar whereas maximum acidity (%) and Vit.-C in Ramkela cultivar of mango were observed during 1995-2020 on degraded lands.  The biomass productivity comprising stem, branches and roots was the highest in Mallika (82.37 Mg ha-1), carbon stock (40.02 Mg C ha-1) with carbon sequestration rate (1.60 Mg C ha-1yr-1) followed by Bombay green (1.50 Mg C ha-1yr-1)  and Langra (1.48 Mg C ha-1yr-1). Net present value of mango cultivars ranged from 32,068 USD in Mallika to 20,514 USD in Bombay Green cultivars of mango. The benefit cost ratio ranged from 3.26 (Mallika) to 2.0 (Bombay Green), thereby presenting adequate choice to the cultivators / growers to select the appropriate cultivars for specialization. The Mallika cultivar of mango outperformed considering demand of pulp/juice industries and Ramkela cultivar well qualified for pickle industries under degraded lands.
On a discrete extremal problem with constraints
Authors: Zakharchenko N.V. , Nakonechna L.I.
Published: October 2022

The results on the existence of solutions for some discrete extremal problems with constraints were established. As an application the existence of a solution of a nonlinear eigenvalue problem was obtained.
On number of particles in coalescing-fragmentating Wasserstein dynamics
Authors: Konarovskyi Vitalii
Published: October 2022

We consider the system of sticky-reflected Brownian particles on the real line proposed in [4]. The model is a modification of the Howitt-Warren flow but now the diffusion rate of particles is inversely proportional to the mass which they transfer. It is known that the system consists of a finite number of distinct particles for almost all times. In this paper, we show that the system also admits an infinite number of distinct particles on a dense subset of the time interval if and only if the function responsible for the splitting of particles takes an infinite number of values.
Strong consistency of the mode of multivariate recursive kernel density estimator under strong mixing hypothesis
Authors: Khadher Fatma Ben , Slaoui Yousri
Published: October 2022

In this research paper, we define a kernel estimator of the mode based on the recursive kernel density estimator developed by [23]. In addition, we establish its almost sure convergence under strong mixing hypothesis. Finally, we corroborate these theoretical results through numerical simulations.
Uniform Limit Theorems under length-biased sampling and type I censoring
Authors: Zamini Raheleh , Jomhoori Sarah
Published: October 2022

In recent years, in view of theory of empirical processes, authors have become more interested in the uniform analogue of the three fundamental theorems: the uniform law of large numbers of Glivenko-Cantelli type, the uniform central limit theorem for Donsker type and the functional law of the iterated logarithm (LIL). In this paper, under the bracketing entropy conditions, the uniform law of large numbers, uniform central limit theorem and the uniform LIL of Strassen type have been investigated in the case of length-biased and type I censoring.
Review - New prospect of algae for sustainable production of lactic acid: Opportunities and challenges
Authors: Siang Aun Cheah  , Choi Yan Chai  , Inn Shi Tan  , Henry Chee Yew Foo  , Man Kee Lam
Published: October 2022

Heavily dependent on fossil fuels has resulted in severe environmental impacts such as exhaustion of natural resources, contamination of the environment, and excessive greenhouse emission. Therefore, intensive research works to explore alternative and sustainable energy sources has been escalated in recent years. In this regard, algae have been exploited as the third-generation of biomass to produce biofuels and biochemicals. Nevertheless, research to produce lactic acid from algae is still limited in the literature. Hence, this review is aimed to provide an extensive mechanism of deriving lactic acid from algae biomass, started with the discussion of the types of algae, the involvement of other microorganisms, fermentation technology, as well as the bottleneck of the technology. The evolution of different biomass feedstocks for lactic acid production is addressed in the initial section of this paper, followed by a discussion on the perspective of novel cascading algae biorefinery systems to truly reveal the potential of algae-based lactic acid production in a sustainable manner.
“Telling it in our own way”: Doing music-enhanced interviews with people displaced by violence in Colombia
Authors: Marsh Hazel , Amijos M. Teresa , Few Roger
Published: October 2022

In Colombia, five decades of violent conflict have displaced millions of people, many of whom now face severe risks from flooding, landslides and other environmental hazards in the places they have found to resettle. In our research, one of our main objectives was to better understand the experiences, vulnerabilities and survival strategies of conflict-displaced people living in hazard-prone locations in Soacha, an urban working-class district of Cundinamarca in the centre of Colombia, and in urban and peri-urban areas in or near Pereira and Manizales, both of which are cities in Colombia’s main coffee-growing region. We wanted to create spaces within which such people could tell their life stories with dignity and agency. For socially and politically marginalised people who have suffered enormous loss and trauma, and the disempowering effects of violence, conventional social science interviews may re-open wounds and cause extreme distress. Furthermore, interviewees may feel that there are ‘good’, ‘bad’ or otherwise ‘preferred’ answers to the questions they are asked. In our research, we instead invited participants to share a piece of music or a song they valued with us, via mp3 players, before opening a conversation about their life stories. In this way, we intended for participants to ‘territorialise’ the research encounter by creating comfortable spaces where their taste and habits were central (Dos Santos and Wagner, 2018), and where they exercised greater control and agency to decide the topics discussed (Levell, 2019). We wanted the songs people shared with us to act as their chosen entry points into their life stories. This article offers some reflections on how talking about music, a cultural form linked closely with emotions, memory and identity, can provide a resource for better understanding the lives and experiences of others.
Storytelling: An Introduction
Authors: Smith Thomas Ruys , Hodgett Susan
Published: October 2022

An introduction to this special issue of New Area Studies dedicated to the theme of Storytelling.
Not Only Rivers and Mountains: Why Story Matters in New Area Studies
Authors: Wilson Philip
Published: October 2022

Area Studies was accused of storytelling, apparently an academic crime that merited its so-called demise. In this paper, I argue that storytelling is an integral part of academic writing in the humanities and that the rebirth of New Area Studies can be at least in part explained by its stress on narrative. Interdisciplinary investigation of story can help the field re-consolidate itself, because theoretical work can both describe and drive practice, as I show by a translation example. I then look outside New Area Studies to three other fields. First, I examine how historians weave narratives out of agreed facts, using Heidegger’s understanding of interpretation and Collingwood’s notion of re-enactment to explain the process. Second, I support Milutinović’s call for a move from the metonymic to the metaphoric in New Area Studies, by showing how the methods and tools of the later Wittgenstein, including his use of story, can be applied to New Area Studies to produce the surveyable representation, a way of making connections evident. Third, I show how dialogue with narrative theory can support the use of literary texts by researchers in New Area Studies, because the mind itself is literary in nature (following Turner), which means that novels can evoke what it feels like to be in a situation. The paper concludes that storytelling, far from being an embarrassment to New Area Studies, should be at the heart of its methodology and should be further examined in order to tell new stories and to tell them well.
Mismatched Reality: Russian Decision-making on the War in Ukraine
Authors: Strickland WIll
Published: October 2022

This article examines why and how Putin’s decision could have been made to go to war with Ukraine in February 2022. It starts with an analysis of whether the decision to invade Ukraine can be seen as rational, and then examines other sociological constructs for explaining the decision. These sociological constructs are based in Max Weber’s concepts of bureaucracy, Bourdieu’s Theory of Practice and Sociological Neo-Institutionalism’s theorising on the externally influenced nature of contemporary bureaucracy. Drawing on these constructs, the article argues that a better lens to understand Putin’s decision is through models that explain the effect of the Kremlin’s bureaucracy on the formation of strategic logic. These arguments and conclusions are consistent with the concerns of New Area Studies scholarship in trying to understand why a particular narrative might form and determine national security decision-making.
Sistemas agroforestales con café: establezca cultivos productivos bajo sombrío
Authors: Farfán-Valencia Francisco
Published: October 2022

En este seminario son presentados los conceptos y prácticas de Sistemas Agroforestales en el cultivo del Café (SAFC), estos sistemas refieren un conjunto de prácticas de manejo del cultivo, donde se combinan especies arbóreas en asocio con el café o en arborización de las fincas. Estas prácticas son el establecimiento de árboles como barreras, linderos, cercos vivos, separación de lotes, estabilización de laderas, protección de fuentes de agua, corredores, senderos ecológicos y restauración ecológica. Igualmente se desmitifican versiones respecto al empleo de sombrío en el café. El árbol de sombrío es un acondicionador del sitio de cultivo del café y son las variables de clima las que determinan si se debe realizar caficultura a libre exposición solar o caficultura bajo sombrío (SAF). Las prácticas y las tecnologías en sistemas agroforestales e investigaciones en temas de caficultura a libre exposición en Cenicafé se hacen para cualquier finca y cualquier zona cafetera. Estas recomendaciones están vinculadas a la estrategia de la Federación Nacional de Cafeteros: “Más Agronomía, Más Productividad, Más Calidad” con el fin de aclarar dudas sobre sembrar a sol o a sombra, variedad a cultivar, densidades de siembra, épocas de renovación, luminosidad, edad de cultivo y nutrición.
Variedades de café: Siémbrelas para asegurar productividad y calidad
Authors: Flórez Claudia Patricia
Published: October 2022

En el seminario Variedades de Café: Siémbrelas para asegurar productividad y calidad, se muestra el estado del arte del mejoramiento genético en Colombia. El recorrido comienza en 1938 cuando se crea Cenicafé y con éste el Programa de Mejoramiento Genético. A partir de esta fecha empiezan a llegar materiales de Coffea arabica provenientes de diferentes orígenes que constituirían la Colección Colombiana de Café. Es así como en 1952 llega la variedad Caturra y en 1961 el Híbrido de Timor, y siete años después se emprendería un programa de cruzamientos que darían origen a 14 variedades mejoradas de café entregadas a partir de 1982 a los caficultores colombianos. Cenicafé optó por utilizar variedades compuestas, lo que significa que son una mezcla de diferentes líneas mejoradas que difieren en su resistencia a la roya, pero que comparten excelentes atributos agronómicos como producción, calidad física del grano y sensorial de la bebida. Esta estrategia, tiene como eje central el uso de la diversidad genética para la obtención de variedades con resistencia durable a la roya. Se muestra cómo opera la resistencia a la roya en las variedades FNC y cómo ha evolucionado la estructura de la caficultura colombiana en términos de variedades. Finalmente, se describen las características de las variedades comerciales actuales de café.
Propiedades físicas de los suelos y su relación con la sostenibilidad de la caficultura colombiana
Authors: Lince-Salazar Luz Adriana
Published: October 2022

Uno de los retos por el cual los colaboradores de la Federación Nacional de Cafeteros trabajamos, día a día, es lograr que la caficultura en Colombia sea 100% sostenible. Para esto nuestra institucionalidad enfoca entre sus cuatro ejes fundamentales el eje ambiental, teniendo el suelo como uno de sus componentes. Para garantizar la sostenibilidad de la caficultura, desde el componente suelo, es fundamental que este cuente con las características químicas, biológicas y físicas que la planta de café requiere, lo que hace importante conocer las propiedades de los suelos de la región cafetera y los requerimientos edáficos de la planta. Este seminario tendrá como eje central la física de suelos para la región cafetera colombiana y su relevancia en la producción del cultivo de café en Colombia, con un enfoque en las propiedades que determinan la capacidad de almacenamiento de agua y el desarrollo de raíces.
Markovianity and the Thompson Group F
Authors:   University College Cork, Ireland, Köstler Claus , Krishnan Arundhathi ,   University of Waterloo, Canada
Published: October 2022

We show that representations of the Thompson group F in the automorphisms of a noncommutative probability space yield a large class of bilateral stationary noncommutative Markov processes. As a partial converse, bilateral stationary Markov processes in tensor dilation form yield representations of F. As an application, and building on a result of Kümmerer, we canonically associate a representation of F to a bilateral stationary Markov process in classical probability.
The Effect of Nanoflare Flows on EUV Spectral Lines
Authors: López Fuentes Marcelo , Klimchuk James A.
Published: October 2022

The nanoflare model of coronal heating is one of the most successful scenarios to explain, within a single framework, the diverse set of coronal observations available with the present instrument resolutions. The model is based on the idea that the coronal structure is formed by elementary magnetic strands which are tangled and twisted by the displacement of their photospheric footpoints by convective motions. These displacements inject magnetic stress between neighboring strands that promotes current sheet formation, reconnection, plasma heating, and possibly also particle acceleration. Among other features, the model predicts the ubiquitous presence of plasma flows at different temperatures. These flows should, in principle, produce measurable effects on observed spectral lines in the form of Doppler shifts, line asymmetries and nonthermal broadenings. In this work we use the two-dimensional cellular automaton model (2DCAM) developed in previous works, in combination with the enthalpy-based thermal evolution of loops (EBTEL) model, to analyze the effect of nanoflare heating on a set of known EUV spectral lines. We find that the complex combination of the emission from plasmas at different temperatures, densities and velocities, in simultaneously evolving unresolved strands, produces characteristic properties in the constructed synthetic lines, such as Doppler shifts and nonthermal velocities up to tens of km s−1 for the higher analyzed temperatures. Our results might prove useful to guide future modeling and observations, in particular, regarding the new generation of proposed instruments designed to diagnose plasmas in the 5–10 MK temperature range.
Determining the Core Structure and Nuclear Equation of State of Rotating Core-collapse Supernovae with Gravitational Waves by Convolutional Neural Networks
Authors: Chao 趙 Yang-Sheng 仰生 , Su 蘇 Chen-Zhi 晨知 , Chen 陳 Ting-Yuan 莛元 , Wang 王 Daw-Wei 道維 , Pan 潘 Kuo-Chuan 國全
Published: October 2022

Detecting gravitational waves from a nearby core-collapse supernova would place meaningful constraints on the supernova engine and nuclear equation of state. Here we use convolutional neural network models to identify the core rotational rates, rotation length scales, and the nuclear equation of state (EoS), using the 1824 waveforms from Richers et al. for a 12 solar mass progenitor. A high prediction accuracy for the classifications of the rotation length scales (93%) and the rotational rates (95%) can be achieved using the gravitational-wave signals from −10 to 6 ms core bounce. By including an additional 48 ms signal during the prompt convection phase, we could achieve an accuracy of 96% in the classification of the four main EoS groups. By combining the three models above, we could correctly predict the core rotational rates, rotation length scales, and the EoS at the same time with an accuracy of more than 85%. Finally, applying a transfer-learning method for an additional 74 waveforms from FLASH simulations, we show that our model using Richers’ waveforms could successfully predict the rotational rates from Pan’s waveforms even for a continuous value with mean absolute errors of 0.32 rad s−1 only. These results demonstrate the much broader parameter regimes to which our model can be applied to identify core-collapse supernova events through gravitational-wave signals.
Numerical Simulation of Hot Accretion Flow around Bondi Radius
Authors: Mosallanezhad Amin , Bu De-Fu , Čemeljić Miljenko , Zeraatgari Fatemeh Zahra , Hai Yang , Mei Liquan
Published: October 2022

Previous numerical simulations have shown that strong winds can be produced in the hot accretion flows around black holes. Most of those studies focus only on the region close to the central black hole; therefore it is unclear whether the wind production stops at large radii around Bondi radius. Bu et al. (2016) studied the hot accretion flow around the Bondi radius in the presence of nuclear star gravity. They find that, when the nuclear stars gravity is important–comparable to the black hole gravity, winds cannot be produced around the Bondi radius. However, for some galaxies, the nuclear stars gravity around Bondi radius may not be strong. In this case, whether winds can be produced around Bondi radius is not clear. We study the hot accretion flow around Bondi radius with and without thermal conduction by performing hydrodynamical simulations. We use the virtual particles trajectory method to study whether winds exist based on the simulation data. Our numerical results show that, in the absence of nuclear stars gravity, winds can be produced around Bondi radius, which causes the mass inflow rate to decrease inwards. We confirm the results of Yuan et al. (2012), which indicate this is due to the mass loss of gas via wind rather than convectional motions.
Mining the Information Content of Member Galaxies in Halo Mass Modeling
Authors: Zhou Yanrui , Han Jiaxin
Published: October 2022

Motivated by previous findings that the magnitude gap between certain satellite galaxies and the central galaxy can be used to improve the estimation of halo mass, we carry out a systematic study of the information content of different member galaxies in the modeling of the host halo mass using a machine-learning approach. We employ data from the hydrodynamical simulation IllustrisTNG and train a random forest algorithm to predict a halo mass from the stellar masses of its member galaxies. Exhaustive feature selection is adopted to disentangle the importance of different galaxy members. We confirm that an additional satellite does improve the halo mass estimation compared to that estimated by the central alone. However, the magnitude of this improvement does not differ significantly using different satellite galaxies. When three galaxies are used in the halo mass prediction, the best combination is always that of the central galaxy with the most massive satellite and the smallest satellite. Furthermore, among the top seven galaxies, the combination of a central galaxy and two or three satellite galaxies gives a near-optimal estimation of halo mass, and further addition of galaxies does not raise the precision of the prediction. We demonstrate that these dependences can be understood from the shape variation of the conditional satellite distribution, with different member galaxies accounting for distinct halo-dependent features in different parts of the cumulative stellar mass function.
A Comparison of Global Magnetofrictional Simulations of the 2015 March 20 Solar Eclipse
Authors: Mackay Duncan H. , Upton L. A.
Published: October 2022

The solar corona exhibits a wide range of phenomena, from highly non-potential objects such as solar filaments to near-potential structures such as the open magnetic flux. For any global model to be useful in space weather applications, the model must on a single day reproduce all of these phenomena in the same simulation, using the same set of coronal physics and parameters. The purpose of the present paper is to evaluate whether the evolving magnetofrictional model can achieve this goal. Twenty-eight separate simulations are analyzed, where each tries to reproduce both highly non-potential and near-potential phenomena observed in the solar corona on the same day. This day is chosen to be 2015 March 20, the date of the solar eclipse. The study evaluates how the cadence of bipole data, ideal or nonideal coronal physics, and the variety of helicity injection mechanisms affect the accuracy of the simulations. Results show that significantly better agreement arises when using Advective Flux Transport (AFT) synoptic maps to drive the simulations, as compared to 27-day Carrington rotation synoptic maps. Using the nonideal effect of hyperdiffusion leads to the worst agreement with all coronal phenomena. Alternatively, when running either ideal or ohmic diffusion simulations with helicity condensation or bipoles with a self-helicity, a good agreement with both on-disk and limb structures can be found. This suggests that future studies aiming to simulate the corona and reproduce multiple phenomena on a given day should use data products such as AFT and avoid using the nonideal physics of hyperdiffusion.
A new species of ice cream cone worm in the Gulf of California (Annelida, Pectinariidae)
Authors: Tovar-Hernández María Ana , de León-González Jesús Angel
Published: October 2022

PectinariaLamarck, 1818 is composed of 30 species, three of them were originally described from the west coast of the USA and Mexico:P. californiensisHartman, 1941 (from Redondo Beach, California, USA),P. newportensisHartman, 1941 (from Newport Bay, California, USA) andP. hartmanaeReish, 1968 (from Bahia de los Angeles, north-western Gulf of California, Mexico).

A new pectinariid polychaete,Pectinaria santiisp. n., is reported from the central-eastern Gulf of California, Mexico.Pectinaria santiisp. n. is clearly distinguished from its congeners by a combination of the following morphological features: segment 4 with a ventral crest with six horn-shaped anterior projections; three chaetigers with notopodia (S5, S6 and S7); 12 chaetigers with noto- and neuropodia (from S8–19); 8–10 golden opercular paleae per lobe; a pair of ear-shaped lobes at the base of the cephalic veil; an anterior row of chaetae on notopodia with a deep incision and a bifid process at the lateral end of the shaft; and 13–21 pairs of amber scaphal hooks with distal margin rounded and hooded. A full description, including variation and photographs in live and fixed specimens, is provided, as well as a key to the species ofPectinariafrom the Tropical Eastern Pacific and Temperate Northern Pacific.
A new species of scops-owl (Aves, Strigiformes, Strigidae, Otus) from Príncipe Island (Gulf of Guinea, Africa) and novel insights into the systematic affinities within Otus
Authors: Melo Martim , Freitas Bárbara , Verbelen Philippe , da Costa Sátiro R. , Pereira Hugo , Fuchs Jérôme , Sangster George , Correia Marco N. , de Lima Ricardo F. , Crottini Angelica
Published: October 2022

A new species of scops-owl (Aves, Strigiformes, Strigidae, Otus) is described from Príncipe Island, São Tomé and Príncipe (Gulf of Guinea, Africa). This species was discovered for science in 2016, although suspicions of its occurrence gained traction from 1998, and testimonies from local people suggesting its existence could be traced back to 1928. Morphometrics, plumage colour and pattern, vocalisations, and molecular evidence all support the species status of the scops-owl from Príncipe, which is described here as Otus bikegilasp. nov. Phylogenetic analyses suggest that this species descended from the first colonisation of the Gulf of Guinea islands, being sister to the clade including the mainland African Scops-Owl O. senegalensis, and the island endemics Sao Tome Scops-Owl O. hartlaubi and Pemba Scops-Owl O. pembaensis. The most diagnostic trait in the field is its unique call which, curiously, is most similar to a distantly related Otus species, the Sokoke Scops-Owl O. ireneae. The new species occurs at low elevations of the old-growth native forest of Príncipe, currently restricted to the south of the island but fully included within Príncipe Obô Natural Park. Otus bikegilasp. nov. takes the number of single-island endemic bird species of Príncipe to eight, further highlighting the unusually high level of bird endemism for an island of only 139 km2.
Musculoskeletal complications in patients with diabetes mellitus
Authors: Choi Jong Han , Kim Hae-Rim , Song Kee-Ho
Published: October 2022

Musculoskeletal conditions are common in patients with diabetes. Several musculoskeletal disorders are viewed as chronic complications of diabetes because epidemiological studies have revealed high correlations between such complications and diabetes, but the pathophysiological links with diabetes remains unclear. Genetic predispositions, shared risk factors, microvascular impairments, progressive accumulation of advanced glycation end-products, and diabetic neuropathy may underlie the development of musculoskeletal disorders. Musculoskeletal complications of diabetics have received less attention than life-threatening microvascular or macrovascular complications. Here, we review several diabetic musculoskeletal complications with a focus on the clinical importance of early recognition and management, which would improve quality of life and physical function.
Le nouveau « plan Taxi » à Bruxelles : vers une ubérisation du secteur ?
Authors: Dufresne Anne , Bauraind Bruno
Published: October 2022

En Belgique, le conflit entre Uber et les acteurs historiques du transport particulier de personnes, les sociétés de taxis et les syndicats du secteur éclate en février 2014, dès l’implantation de la société américaine dans la Région de Bruxelles-Capitale. Il porte essentiellement sur les modalités de légalisation d’Uber et se déroule dans le cadre d’une réglementation vieille de 27 ans, qui ne prend pas en compte les évolutions technologiques récentes.
Nouvelle directive sur des salaires minima adéquats
Authors: Math Antoine
Published: October 2022

Cet article présente les raisons qui ont conduit l’Union européenne à se doter d’une nouvelle directive promouvant des salaires minimaux « adéquats », les principaux points figurant dans cette directive et ses effets attendus ou possibles. Si le contenu du texte est très peu contraignant, il pourrait néanmoins créer une dynamique en faveur d’une amélioration des salaires minima, en permettant des modes de revalorisation des montants plus clairs et plus convergents. La réelle volonté des dirigeants du continent de soutenir les salaires minima est discutée, compte tenu des revalorisations du montant des salaires minima bien inférieures à la forte inflation dans beaucoup de pays.
L’économie, une continuation de la guerre avec d’autres moyens
Authors: Serfati Claude
Published: October 2022

L’invasion de l’Ukraine par la Russie accélère la fragmentation géopolitique de l’économie mondiale qui a commencé à la fin des années 2000. Les pays occidentaux proposent la constitution d’un « Otan économique » et la relocalisation des activités de leurs groupes industriels dans les « pays amis ». La Chine est ciblée comme « rival systémique », à la fois adversaire géopolitique et économique. La proximité de a concurrence économique et des rivalités géopolitiques survient dans le contexte des crises multidimensionnelles qui frappent l’humanité.
Médias, innovez ! Construction et appropriations différenciées de l’injonction à l’innovation médiatique
Authors: Ouakrat Alan , Petters Lorreine , Pacouret Jérôme
Published: October 2022

L’innovation dans le journalisme est un sujet pluriel, vaste et souvent mal défini, qui suscite un intérêt croissant dans les recherches universitaires et pour les professionnels du secteur. Notre proposition consiste d’abord à revenir sur les politiques institutionnelles et les incitations publiques et privées à l’innovation dans le journalisme en France, puis à nous intéresser aux stratégies d’appropriation de ces dispositifs par différents médias. À partir d’une enquête en rédaction, nous mettons l’accent sur trois éléments saillants et partagés : une forte mobilisation des exemples internationaux, une externalisation du financement des expérimentations technologiques et le renforcement d’une logique servicielle des médias.
Tensions entre deux conceptions du journalisme lors de la publication d’une tribune antiféministe en 2018
Authors: Beaulieu Laure
Published: October 2022

Cet article cherche en analysant un moment spécifique — la publication d’une tribune anti-féministe par un quotidien national en 2018 dans le contexte post #Metoo —, à mettre en lumière deux conceptions distinctes de l’excellence journalistique, et de l’objectivité comme norme professionnelle. Ces deux conceptions, l’une « orthodoxe » et l’autre « critique », coïncident avec des appropriations différenciées des idées féministes chez les journalistes et se manifestent au sein de la rédaction par des tensions fortes lors de la publication de cette tribune.
Homophilie et cybernétique dans les médias contemporains
Authors: Lukasik Stéphanie , Galli David
Published: October 2022

En vingt-cinq ans de mutation du journalisme, les professionnels de l’information ont dû faire face à l’évolution de leurs pratiques. Aujourd’hui, l’information-médiatique (la mise en forme par les médias) s’agrège à l’information-donnée (la codification binaire) au sein de réseaux socionumériques. L’enjeu principal de cette évolution est l’homophilie, issue des logiques cybernétiques. En renouant avec des figures fondatrices des sciences de l’information et de la communication comme Norbert Wiener pour la cybernétique, et Paul F. Lazarsfeld pour l’homophilie, nous réinterrogeons le concept d’information à l’aune du nouvel écosystème médiatique.