bluuebunny/crossref_metadata_2025 huggingface dataset:
Spatial Heterogeneity of Glomerular Phenotypes Affects Kidney Biopsy Findings
Authors: Schaub Jennifer A. , O'Connor Christopher L. , Dailey Meghan , Hlynka Andrew W. , Chang Yurui , Postiff Deborah , Kaffenberger Samuel D. , Palapattu Ganesh S. , Gillespie Brenda W. , Hodgin Jeffrey B. , Shedden Kerby , Bitzer Markus
Published: October 2023

Key Points

Glomeruli with pathologic changes are not homogeneously distributed throughout the kidney cortex.

Biopsies that do not include the kidney capsule may underdetect glomeruli with pathologic changes.

Location of glomeruli with pathologic changes may be related to underlying clinical characteristics.

Background

Detection of rare glomerular phenotypes can affect diagnosis in indication kidney biopsies and in kidney tissue used for research studies. Nephropathologists are aware of potential sampling error when assessing needle biopsy cores, but quantitative data are lacking.

Methods

Kidney tissue from patients undergoing total nephrectomy enrolled in an observational, cross-sectional cohort study was used to characterize glomeruli as typical or atypical, which included globally sclerotic glomeruli (GSGs), segmentally sclerotic glomeruli, ischemic-like, and imploding. A 2D map of the glomerular annotations was generated. Spatial centrality of atypical glomeruli using the L2 metric and differences in pairwise distances between typical or atypical glomeruli were calculated. To determine how the yield of capturing atypical glomerular phenotype was affected by biopsy depth (i.e., not including the renal capsule), simulated kidney biopsies were generated from the 2D map.

Results

The mean number of glomeruli in a nephrectomy specimen was 209 (SD 143), and GSGs were the most common type of atypical glomeruli (median: 13% [interquartile range: 5,31]). Typical glomeruli were more likely to be surrounded by other glomeruli (i.e., centrally located in the kidney cortex) than GSGs, segmentally sclerosed glomeruli, ischemic-like glomeruli, and imploding glomeruli. Atypical glomeruli were 7.3% (95% confidence interval, 4.1 to 10.4) closer together than typical glomeruli and were more likely to be closer together in older patients or those with hypertension. In simulated kidney biopsies, failure to capture the capsule was associated with underdetection of GSGs, ischemic-like glomeruli, and imploding glomeruli.

Conclusions

Spatial analysis of large sections of kidney tissue provided quantitative evidence of spatial heterogeneity of glomerular phenotypes including clustering of atypical glomeruli in individuals with hypertension or older age. Most importantly, deep kidney biopsies that lack subcapsular area underdetect atypical glomerular phenotypes, suggesting that capturing the renal capsule is an important quality control measure for kidney biopsies.
The Enduring Fight for Justice
Authors: Gonzales Matt , Gross Barbara , Doucet Fabienne
Published: October 2023

Introduction to VUE Volume 52, Issue 1--Chasing Equity: Fighting for Justice in New York City's Schools
ESG en Route to Statism
Authors: Mendenhall Allen
Published: October 2023

The following is the text of the 2023 Henry Hazlitt Memorial Lecture, sponsored by Harvey and Mei Allison, given at the Austrian Economics Research Conference, Ludwig von Mises Institute, Auburn, Alabama.
pensamiento de Zoltán Simon sobre temporalidad. Aportes para la Arqueología Histórica
Authors: Ferro María Virginia Elisa
Published: October 2023

Zoltán Boldizsár Simon es investigador de la Universidad de Bielefeld. Ha sido profesor asistente en la Universidad de Leiden y profesor visitante en el Instituto Max Planck de Historia de la Ciencia. Ha escrito sobre teoría y filosofía de la historia, sobre el tiempo histórico y cuestiones de temporalidad, y sobre los desafíos planteados, por la tecnología y el Antropoceno, al pensamiento histórico moderno. En este trabajo, nos proponemos analizar los términos centrales de su propuesta y cómo pueden llegar a ser un aporte en el marco de la Arqueología Histórica contemporánea. Sostenemos que la visión transdisciplinar que subyace en Simon, es fundamental para incorporar discusiones en la Arqueología Histórica anclada juntamente con los cambios en las nociones de Historia, historicidad, tiempo y temporalidad. Se trata de un camino a explorar e integrar conceptos que van desde el mundo humano, tecnológico y natural, situado en pleno siglo XXI.
Les contentieux administratifs de demain
Authors: Savouré Bertrand
Published: October 2023

Les contentieux administratifs de demain seront essentiellement les mêmes qu’aujourd’hui. Cependant, les évolutions de la société ne sont pas sans incidence sur l’activité du juge et peuvent provoquer le développement de contentieux existants voire en faire émerger de nouveau. Le contentieux administratif de demain sera aussi marquée par la question toujours d’actualité de la distinction entre recours pour excès de pouvoir et plein contentieux.
Electrically Tunable Four-Mirror Gyrotron with Crossed Fields
Authors: Kurayev A. A. , Matveyenka V. V.
Published: October 2023

In a four-mirror gyrotron, a wide multi-screw electron beam, being in crossed electric and longitudinal magnetic fields, drifts with a velocityvd=E0/B0in the direction of theT-wave propagation between the resonator mirrors (co-current wave) or in the opposite direction (counter-propagating wave). In this case, in accordance with the Doppler effect, the generation frequency ω is determined from the synchronism conditions as ω ≈kωl(1±βd), βd=vd/с. Thus, a change in E0changes ω, i. e. electrical frequency tuning is carried out. The article presents a diagram of the design of a two-beam four-mirror gyrotron. The calculations were carried out for βd= 0.5,q= β||/β⊥= 2, the interaction was carried out at the frequency harmonic numberk= 1. The tuning band was 20 %. The maximum efficiency is 48 %, the minimum is 33 %. Since the calculations were performed for dimensionless parameters, i.e., having a universal character, the physical characteristics of the gyrotron at a wavelengthλ= 6 mm (f0= 50 GHz) and a loaded resonator quality factorQl= 200 were as follows: electron beam currentI0= 60 A,B0= 2 T, voltageU0= 79 kV, efficiency = 48 %.
A STUDY OF CELLULOSE AND LIGNIN EXTRACTED FROM SĀNCI BARK AND THEIR MODIFICATION
Authors:   Department of Chemical Sciences, Tezpur University, Tezpur 784028, Assam, India, ALI ASADULLA ASRAF , MAZUMDAR SHIRSA ,   Department of Chemical Sciences, Tezpur University, Tezpur 784028, Assam, India, KUMAR DUTTA ROBIN ,   Department of Chemical Sciences, Tezpur University, Tezpur 784028, Assam, India
Published: October 2023

Numerous studies have been carried out regarding different early and medieval writing bases like papyrus, birch bark, parchment, and Tālpātra. The quality of plant-derived manuscript writing bases has been aided by the presence of cellulose and lignin in plant cell walls. Sāncipāt, a popular writing base in early and medieval Assam, India, has not yet been thoroughly studied in this regard. In this paper, a scientific attempt has been made to reveal the physicochemical and mechanical properties of cellulose and lignin fibre in Sāncipāt. Various analytical techniques, including FTIR, P-XRD, TEM, UTM, were employed to characterize the cellulose fibres and lignin extracted from both old and new Sāncipāt, as well as their modified forms. A comparative analysis was made between the old and new bark samples of both cellulose fibres and lignin, and the general conclusions drawn from this work can be attributed to structural, thermal, and morphological changes of both cellulose fibres and lignin with degradation and decomposition, accompanied by ageing. The structural and chemical compositions of the extracted samples from the old and new barks were found to be almost identical, indicating only some minor degradation. While FTIR and UV spectroscopic analyses of the samples confirmed the successful extraction of cellulose fibres and lignin, electron microscopy and X-ray diffraction techniques allowed observing the structural and morphological changes that had occurred in the old bark samples as a result of ageing. Thermal stability studies and tensile strength measurements were also carried out to investigate the mechanical properties of the old and new bark samples.
NANOFIBRILLATED CELLULOSE AEROGEL FROM KHAT (CATHA EDULIS) WASTE: FABRICATION AND CHARACTERIZATIONS
Authors:   Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia, DILEBO JEMAL , GABRIEL TESFAYE ,   Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia, WONDU KEBEDE ,   Department of Pharmaceutics and Social Pharmacy, School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
Published: October 2023

Cellulose fiber was extracted from khat waste (KW) using the chlorine free method and an aerogel was prepared by freeze drying of nanofibrillated cellulose of KW. The aerogel was loaded with a model drug, diclofenac sodium. The drug loaded aerogel (LA), drug unloaded aerogel (ULA), as-extracted cellulose (Cel) and KW were characterized using different instrumental techniques. Nanofibrillation of the cellulose fiber for 4 h gave 83.06% nanofiber. ULA had lower crystallinity index, as compared to Cel (53.89% vs 65.22%), but had higher thermal stability than LA and Cel. The drug loading capacity of the aerogel was 11.7 mg of pure drug per 100 mg of the nanofiber. The in vitro drug release from LA was less than one-third of the loaded drug (i.e., 31.4%) within 6 h. The findings highlight that nanofibrillated cellulose aerogel can be prepared from KW and may have potential applications in areas such as drug delivery.
EVALUATING SUITABLE CHELATING AGENTS FOR Q STAGE IN TCF BLEACHING OF WHEAT STRAW ALKALINE PULPS
Authors:   Department of Material and Material Processing Technologies, Arsin Vocational School, Karadeniz Technical University, 61900 Arsin, Trabzon, Turkey, ERSOY KALYONCU EVREN , KIRCI HÜSEYIN ,   Department of Forest Industry Engineering, Faculty of Forestry, Karadeniz Technical University, 61080 Trabzon, Turkey, PEŞMAN EMRAH ,   Department of Forest Industrial Engineering, Faculty of Forestry, Artvin Coruh University, 08000 Artvin, Turkey
Published: October 2023

The aim of this study was to determine an appropriate chelating agent for Q stage in the TCF bleaching sequence of soda-oxygen, soda, soda-anthraquinone and alkaline-sulfite wheat straw pulps prior to P bleaching stage. In order to study the possible effect of chelating agents, three different chelating agents (EDTA, DTPA and DTMPA) were used. To evaluate the impact of transition metal ions on P stage, the residual Mn, Fe and Cu ion concentrations were determined with atomic absorption spectrometry. Ash and silica contents of pulps have been determined for each chelating agent, separately. FTIR-ATR spectroscopy was used to demonstrate the bleaching effect. The results showed that the most appropriate chelating agents varied depending on the type of pulp. The best chelating effect was achieved with DTMPA for soda-oxygen pulp, EDTA for both soda and alkaline-sulfite pulps, and DTPA for soda-anthraquinone pulp.
Different temperature dependence of mobility in n- and p-channel 4H-SiC MOSFETs
Authors: Chi Xilun , Tachiki Keita , Mikami Kyota , Kaneko Mitsuaki , Kimoto Tsunenobu
Published: October 2023

The impact of interface state density (D
it) near the conduction band edge (E
C) and the VB edge (E
V) on the field-effect mobility (μ
FE) of NO- and N2-annealed n- and p-channel MOSFETs was investigated. With lowering the temperature, μ
FE of n-channel MOSFETs decreased whereas μ
FE increased in p-channel devices. Despite the comparable D
it values near E
C and E
V, p-channel MOSFETs have less trapped carriers due to a deeper surface Fermi level caused by the larger effective masses of holes, resulting in smaller Coulomb scattering, and this may cause the different temperature dependence of μ
FE in n- and p-channel MOSFETs.
Characterization of ZnS films on different substrates by pulsed laser deposition
Authors: Wang Caifeng , Xing Zhenyue , Feng Weiwei , Xu Ling , Ye Yingchun
Published: October 2023

ZnS films were deposited on Si and quartz substrates via pulsed laser deposition, and the structure, morphology and photoelectric characteristics of as-deposited and annealed ZnS films were compared. X-ray diffractometer results show that ZnS films are polycrystalline, and the intensity of peak at 28.4° on Si is larger, with a narrower FWHM. atomic force microscope topographies show that the surface of ZnS films becomes rough after annealing, and the roughness on quartz is obviously larger than that on Si. The transmittance of ZnS films in the visible light region reaches 80%, which indicates that ZnS is suitable for making transparent conductive films. PL spectra show that there are two luminescence peaks at 425 and 445 nm related to the intrinsic defect levels of ZnS. Due to the small lattice mismatch, PL intensity on Si is significantly weaker than that on quartz. I–V characteristics of ZnS/p-Si heterojunctions show typical p–n junction diode-like rectification behavior.
Photoelectron holographic evidence for the incorporation site of Se and suppressed atomic displacement of the conducting layer of La(O,F)BiSSe
Authors: Li YaJun , Sun ZeXu , Kataoka Noriyuki , Setoguchi Taro , Hashimoto Yusuke , Takeuchi Soichiro , Koga Shunjo , Hoshi Kazuhisa , Mizuguchi Yoshikazu , Matsushita Tomohiro , Wakita Takanori , Muraoka Yuji , Yokoya Takayoshi
Published: October 2023

La(O,F)BiS2-x
Se
x
is a layered material that is considered to be a candidate exotic superconductor as well as a promising thermoelectrical material. We performed soft X-ray photoelectron holography to study the Se incorporation site and the local atomic arrangement of the conducting layer. A comparison of the experimental holograms with the simulated holograms indicates that Se atoms preferentially occupy the S sites in the conducting Bi–S plane of La(O,F)BiS2. A comparison between the state-of-the-art holographic reconstructions of La(O,F)BiSSe and La(O,F)BiS2 suggests that Se substitution suppresses the displacement of S atoms in La(O,F)BiS2. These results provide photoelectron holographic evidence for the Se incorporation site and the Se-induced suppression of in-plane disorder.
Cronotassi
Authors: Rainer Franz
Published: October 2023

Un lettore ci domanda se si dica cronotassi o cronostassi, e un altro chiede quale sia il significato della parola.
Математичне та інформаційно-технологічне забезпечення комп’ютерної системи моделювання процесів ціноутворення енергоринку
Authors: Євдокімов Володимир
Published: October 2023

Монографію присвячено дослідженням проблемі математичного моделювання процесу ціноутворення на ринку електроенергії. Розглянутий процес ціноутворення як результат взаємопов'язаної взаємодії функціональних підсистем, елементарних вузлів, вузлових точок ринку на яких формуються потоки децентралізованого організаційного (потік регуляторних впливів), технологічного (потік енергії), економічного (потік фінансів) та інформаційного (потік показників стану ринку і зовнішнього середовища) управління, які забезпечують функціонування процесу динамічного ціноутворення. Його відмінність визначається способом декомпозиції складної організаційно-технічної системи ціноутворенням, яка базується на реально взаємопов'язаних процесах фізичного потокорозподілу енергії та економічного потокорозподілу. Запропоновано нові засоби математичного та комп’ютерного моделювання процесів функціонування системи ціноутворенням, шляхом побудови алгоритмічних та імітаційних моделей досліджуваних процесів формування цін та інформаційно-технологічного забезпечення для застосування в програмно-апаратної комп’ютерної системи моделювання із розвинутими засобами змістовної обробки даних і користувацького інтерфейсу задля організації всебічного дослідження процесу ціноутворення та підвищення продуктивності вирішення завдань удосконалення діючих та розробки нових механізмів управління процесом ціноутворення. Монографія призначена для наукових співробітників, спеціалістів та фахівців в галузі знань інформаційни технології, розробки якіх пов'язані з побудовою математичних моделей та інформаційно-технологічного забезпечення задля дослідженння процесів функціонування ринку електричної енергії та ціноутворення на ньому, аспирантів та студентів вищих навчальних закладів відповідних спеціальностей - електрична інженерия, енергоменеджмент, інформаційні технології.
Terahertz-Enpowered Communications and Sensing in 6G Systems: Opportunities and Challenges
Authors: Jiang Wei , Schotten Hans Dieter
Published: October 2023

A brief but holistic overview about THz communications and Sensing in the upcoming 6g and beyond wireless communications systems. It highlights the major opportunities and challenges to be addressed.
Utilizing Reclaimed Asphalt Pavement in Preservation Treatments
Authors:   University of Illinois Urbana-Champaign, Sayeh Watheq , Al-Qadi Imad ,   University of Illinois Urbana-Champaign, Hajj Ramez ,   University of Illinois Urbana-Champaign
Published: October 2023

The use of reclaimed asphalt pavement (RAP) has economic and environmental impacts. This report investigates the prospective use of RAP in preservation treatments (mainly chip sealing and microsurfacing) in Illinois. A review of the current state of knowledge and practice was conducted. The economic and logistic feasibility of using RAP in preservation treatments in Illinois were investigated. Data were collected on RAP availability in the state followed by a survey distributed to district engineers and highway construction contractors. The survey asked about the availability of RAP, its viability in preservation treatments, and the readiness for its application. A unit price analysis was conducted to assess the financial viability of using RAP compared to virgin aggregate. The results suggested there was an excess of good quality and fractionated RAP, and contractors are open to using RAP in various applications. Considering contract unit prices in Illinois, no significant difference would be expected when RAP is used in place of virgin aggregate. Hence, using RAP in preservation treatments would probably make preservation treatments more viable. Economic and environmental analyses demonstrated that using RAP in preservation treatments would reduce the impact on the environment by reducing energy, global warming potential, and greenhouse gases while providing cost savings. A simple decision tool was developed to provide guidance on using RAP in preservation treatments.
Field-Curing Methods for Evaluating the Strength of Concrete Test Specimens
Authors:   Illinois State University, Solanki Pranshoo , Xie Haiyan ,   Illinois State University
Published: October 2023

The American Association of State Highway and Transportation Officials R 100 standard provides instructions for making and curing concrete test specimens in the field. However, further research is needed to compare the strength of the field-cured specimen with the strength of the actual in-place concrete item. The purpose of this combined laboratory and field study was to evaluate field-curing methods of concrete specimens for estimating the early opening strength of an in-place concrete item. The researchers used one Illinois Department of Transportation class PV mix to cast cylinders, beams, and in-place concrete slabs on October 2021 and February 2022 at an Illinois State University concrete experiment site. Concrete cylinders were cured using three methods: ambient air (Method #C1), insulated box/cooler (Method #C2), and power-operated box (Method #C3). Beams were cured using two methods: ambient air (Method #B1) and insulated plywood box (Method #B2). The cast-in-place specimens from each slab and cylinder were tested for compressive strength, and beams were tested for flexural strength after 1, 3, and 7 days of curing. One cylinder and one beam in each curing method along with slabs were embedded with sensors to collect temperature variation with time. Only Methods #C1, #C2, and #B1 were selected for evaluating further in the field, and data were collected from an IDOT District 5 box culvert demonstration project. Laboratory results showed that Method #C2 curing of 150 mm (6 in.) cylinders estimated early (1 to 3 days) compressive strength of an in-place concrete item within an acceptable range. For estimating the 7-day strength of an in-place concrete item, Method #C1 produced acceptable results. Further statistical analysis supported the results observed in the laboratory and field.
Advances in Pulsar Candidate Selection: A Neural Network Perspective
Authors: Sureja Spandan
Published: October 2023

Pulsars have played an important role in comprehending the universe. They play a key role in understanding various phenomena like general relativity, gravitational waves, properties of matter, collision of black holes and the evolution of stars and nebulae. Thus, identifying them is a crucial task. The increasing number of surveys has created a large volume of candidate samples, in the range of several million. Hence, it is impossible to select pulsars from these samples using human-driven methods. Automatic Pulsar Candidate Identification (APCI) was introduced for this purpose. In recent years, various deep-learning techniques and models have been implemented for this purpose. Specific deep neural network models and hybrid models were designed to select pulsar candidates from various surveys consisting of radio and X-ray samples. In this study, a series of models implementing ANN, CNN and GNN are discussed capable of selecting pulsar candidates. These models were trained using a wide range of surveys.
O zaślepieniu, nieprzejrzystości i reinkarnacji. „Zaćma” Ryszarda Bugajskiego
Authors: Nadgrodkiewicz Grzegorz
Published: October 2023

Nadgrodkiewicz poddaje analizie wybrane sceny z filmu Zaćma (2016) w reżyserii Ryszarda Bugajskiego. Głównym kontekstem interpretacyjnym jest dla autora tradycja tak zwanego filmu pasyjnego – subgatunku w obrębie kina religijnego – który zasadza się na ponawianej ewokacji archetypowego obrazu Męki Jezusa Chrystusa i poddawaniu go rozmaitym artystycznym przetworzeniom w dziele filmowym. Autor dowodzi, że Zaćma może być postrzegana jako film, który w swej głębokiej, onirycznej warstwie narracyjnej jest swoistym remakiem tematu pasyjnego. Dla poparcia tej tezy Nadgrodkiewicz szkicuje teoretyczny model wędrówki toposu Drogi Krzyżowej i uznaje film Bugajskiego za dzieło, które w pewnym sensie ukrywa przed widzem swój status remake’u. Tekst zamyka metafora reinkarnacji jako wiecznotrwałej wędrówki toposów.
Human development, population, and environmental burden: Historical perspective and a peek into the future
Authors: Lind Niels C.
Published: October 2023

The human species has continuously progressed in health, wealth, education, and population worldwide since industrialization. A measure of this advance, the Development Progress Index (DPI), is applied here to the world from 1770 to the present and then projected to the year 2100 for three shared socioeconomic pathways. Concurrently, our total environmental impact continues to grow with population and consumption. However, progress has been uneven across regions. While China is projected to outdistance the United States, India is projected to surpass both this century. The population keeps growing, and the average individual DPI-value has now grown enormously - by a factor of 17 since 1770. The environmental burden to sustain the human lifestyle is reflected by the world’s gross domestic product that has meanwhile grown by a factor of 155. If such human progress is to continue apace, the gross world product will be more than 2000 times higher by 2100. Already now a concern, the environmental impact is projected to grow five times larger by 2100. Human environmental impact needs a measure and attention.
Rheumatoid Arthritis: It’s Effects on Oral Cavity in Elderly Population
Authors: - Sanam Deep Singh Nijjar , - Amreen Kaur Grewal
Published: October 2023

“Rheumatoid Arthritis (RA) is an autoimmune and inflammatory disease ie. body’s own immune system attacks healthy cells in your body causing inflammation”. RA mainly attacks the joints in hands, writs, knees. It mainly damages the synovial tissue connecting bones and joints. People experience different signs and symptoms that may include but not limited to: pain or aching in more than one joint; Stiffness in more than joint; fever, weight loss; fatigue; weakness etc.
Overview on the endoscopic treatment for obesity: A review
Authors: Abdulla Maheeba , Mohammed Nafeesa , AlQamish Jehad
Published: October 2023

Obesity rates have increased, and so has the need for more specific treatments. This trend has raised interest in non-surgical weight loss techniques that are novel, safe, and straightforward. Thus, the present review describes the endoscopic bariatric treatment for obesity, its most recent supporting data, the questions it raises, and its future directions. Various endoscopic bariatric therapies for weight reduction, such as intragastric balloons (IGBs), aspiration therapy (AT), small bowel endoscopy, endoscopic sleeve gastroplasty, endoluminal procedures, malabsorption endoscopic procedures, and methods of regulating gastric emptying, were explored through literature sourced from different databases. IGBs, AT, and small bowel endoscopy have short-term effects with a possibility of weight regain. Minor adverse events have occurred; however, all procedures reduce weight. Vomiting and nausea are common side effects, although serious complications have also been observed.
IMPROVING MEDICAL CARE IN MOBILE HEALTHCARE
Authors: Федоткина Светлана Александровна , Хугаева Эльза Влерьевна
Published: October 2023

В последнее время использование мобильных технологий в здравоохранении (mHealth) стало популярным, особенно в профилактике и лечении артериальной гипертензии. В нашем исследовании мы научно обосновали применение дистанционного мониторирования артериального давления с использованием мобильного приложения. Полученные результаты выявили нормализацию уровня артериального давления у 86% пациентов, участвовавших в исследовании.

Recently, the use of mobile technologies in healthcare (mHealth) has become popular, especially in the prevention and treatment of hypertension. In our study, we scientifically justified the use of remote monitoring of blood pressure using a mobile application. The results revealed normalization of blood pressure in 86% of the patients who participated in the study.
DISTINCTIVE FEATURES MENTORING AS A METHOD OF STAFF TRAINING
Authors: Заякина Ирина Александровна , Козловская Анастасия Сергеевна
Published: October 2023

В данной статье проводится анализ наставничества как метода обучения персонала в организации, выявляются его достоинства и недостатки в практике управления персоналом.

This article analyzes mentoring as a method of training personnel in an organization, identifies its advantages and disadvantages in the practice of personnel management.
STUDIES OF ICE-FORMING PROPERTIES OF ALUMINUM OXIDE CLUSTERS
Authors: Геккиева Сафият Омаровна , Будаев Алим Хадисович
Published: October 2023

В статье представлены результаты исследований льдообразующих свойств кластеров оксида алюминия AlO. Представлены особенности алюминия. Изучены особенности образования кластеров при термической возгонке алюминия в присутствии водяного пара, формы кристаллов, образующихся на кластерах оксида алюминия, а также определена их льдообразующая эффективность.

The article presents the results of a study of the ice-forming properties of aluminum oxide clusters AlO. The features of aluminum are presented. The features of cluster formation during thermal sublimation of aluminum in the presence of water vapor, the shape of crystals formed on aluminum oxide clusters, and their ice-forming efficiency are studied.
The Influence Of Knowledge And Service On Public Interest In Using Mudharobah Saving Products At Bank Kalbar Sharia Sambas Branch
Authors: Misbun  , Sri Deti  , Beti Yanuri Posha
Published: October 2023

This study departs from the public's interest in transacting in Islamic banking, one of which is from the level of knowledge and service the bank itself has for customers, the more understanding and services provided, the higher the interest in transacting at Bank Kalbar Syariah Sambas Branch with a Research Focus How does variable X1 influence (knowledge) of variable Y (intention to save) on mudharabah savings products, at Bank Kalbar Syariah Sambas Branch?. This research uses quantitative methods, including field studies. Data collection techniques through interview techniques and questionnaire surveys in the form of questionnaires were then analyzed using the classical assumption test, multicollinearity, non-autocorrelation test, and non-heteroscedasticity test. The results of the study show the following hypotheses t test (Partial), customer knowledge partially influences the intention to save, service partially influences the intention to save. Meanwhile, based on the results of the F test on the ANOVA table it shows that the F value is 854,188 with a probability value of 0,000 so < 0.05. Then F count > F table, namely 854,188 > 3,088 so based on the hypothesis used in this study H1 is accepted and H01 is rejected, H2 is accepted and H02 is rejected, and H3 is accepted and H03 is rejected thus knowledge and service of the Sambas Branch Sharia Bank Kalbar simultaneously affect interest in saving
A Study about Inequality in the Scholarly Publishing of Korean Research Institutions using the Gini Coefficient
Authors:   The Korean Data Analysis Society, j j , j j
Published: October 2023

This study uses the Gini coefficient to examine the inequality in scholarly publishing for research institutions that have published articles in international journals in Korea for the past 20 years. The Gini coefficient was calculated using the number of papers and the cited-by counts, and the academic fields in which the Gini coefficient changed over time was identified. The result show that the inequality among Korean research institutions did not decrease compared to the 2000s, showing an inequality of g = 0.75-0.82. Broken down by academic fields, clinical medicine has the largest inequality, and the inequality in the art and humanities was found to have worsened in the past decade. This is the first study to understand the inequality in research output for all research institutions on country through the Gini coefficient. This study emphasizes on the use of Gini coefficients, to accurately measure the concentration of research output and its changes. By comparing differences among disciplines or countries, it can contribute to discussing the issue of inequality.
Sparse Least Absolute Deviation Support Vector Machine
Authors:   The Korean Data Analysis Society, Jung Kang-Mo
Published: October 2023

The support vector machine solves a quadratic programming problem with linear inequality and equality constraints. However, it is not trivial to solve the quadratic problem. The least squares support vector machine(LS-SVM) solves a linear system by equality constraints instead of inequality constraints. LS-SVM is a popular method in regression and classification problems, because it effectively solves simple linear systems. There are two issues with the LS-SVM solution : the lack of robustness to outliers and the absence of sparseness. In this paper, we propose a sparse and robust support vector machine for regression problems using the least absolute deviation support vector machine (LAD-SVM) and recursive reduced LS-SVM (RR-LS-SVM). The split-Bregman iteration gives the exact solution for the LAD-SVM problem, while RR-LS-SVM gives a sparse solution with a much smaller number of all support vectors. Numerical experiments with simulation and benchmark data demonstrate that the proposed algorithm can achieve comparable performance to other methods in terms of robustness and sparseness.
Estimation and Prediction Model for Functional Time Series Data and Application
Authors:   The Korean Data Analysis Society, Lee Donghyuk , Yang Hojin
Published: October 2023

Carbon dioxide (CO2) in the atmosphere is a greenhouse gas that absorbs radiant energy emitted from the earth's surface and maintains a suitable temperature for life on the earth. However, human activities such as rapid industrialization have recently increased the concentration of CO2, which has become a cause of global warming. In order to understand and monitor changes in CO2 level, many studies are learning through numerical models related to current and past CO2 level and predicting future CO2 level. In this study, we consider the CO2 data measured by the Korea Meteorological Administration as a functional time-series data model, incorporate the functional data method with the time-series method. Existing studies have used traditional time-series and longitudinal data approaches after fixing seasonal and spatial criterion to entire CO2 data. However, assuming that the CO2 level is a continuous function over the time space looks more reasonable than assuming the CO2 level is a scalar at individual time point. Therefore, a part from the traditional methods, we assume the observed data as functional data and use a functional data method to infer the dependent relationship between the functions and apply such a approach to the CO2 data collected from 2001 to 2021 in Korea. Also, we introduce forecasting method that can predict the CO2 level for a specific future time.
Inference of Ensemble Method Using Homomorphic Encryption
Authors:   The Korean Data Analysis Society, Jung Jaekyeong , Lee Jongyoung , Shin ShungChul , Lee Sungil , Choi Hosik
Published: October 2023

According to the recent amendment of data-related bills, active efforts are being made to conduct big data analysis for hyper-personalization services. Hyper-personalization services involve several data integration, including external data. However, it also inherently possesses limitations in usage due to concerns about private information leaks, which can lead to damages to individuals and businesses and unnecessary societal losses. One approach to mitigate such security risks is to use homomorphic encryption, which protects private information. In particular, homomorphic encryption fundamentally prevents private information leakage during data integration and analysis processes and retains original data. In this study, we develop an algorithm for performing inference using an ensemble learning method with homomorphic encryption and apply it to real financial complaint data. We demonstrate the equivalence between scores obtained from random forest and XGBoost in plaintext and those derived from the homomorphic ciphertext. Empirical results show that the algorithm achieves inference computation times in approximately 0.4 seconds, confirming the potential utility of the tree-based ensemble learning method.
Asymmetric Volatility Effects of Stock Trading of Foreign Investors
Authors:   The Korean Data Analysis Society, Jeon Hyung Chol , Hyung Namwon
Published: October 2023

This paper investigates whether the unexpected net selling by foreign investors is regarded as a bad news for domestic investors and causes asymmetric volatility beyond the bad news of the market. Stocks are sorted into five groups by the ratios of foreign investors' holding stock, and analyze if the lower ratios would lead to any difference in the asymmetry. We estimate bivariate GARCH model, diagonal BEKK, and find that stocks with lower proportion of foreign investors tend to show higher asymmetric volatility. Since stocks with lesser foreign investors tend to higher proportions of local investors, we can conclude that stocks with higher proportions of local investors tend to show higher asymmetric volatility. The effect of firm size was further analyzed to determine whether this was the cause of the asymmetric volatility. The stocks of five groups were again sub-divided by firm size into three groups, large, mid-cap, and small stocks. Within each group, additional asymmetry due to the unexpected net selling by foreign investors was evident in small and mid-cap stocks. Thus we claim that domestic individual investors' risk aversion would be a possible cause for the asymmetric volatility along with a bandwagon effect. Bandwagon effect arise since individual traders are aware that foreign investors are well-informed traders and choose to follow their action.
Analyzing the Impact of Economic Policy Uncertainty on Short-Term and Long-Term Government Bond Yields
Authors:   The Korean Data Analysis Society, Bak Yuhyeon , Song Cheol Jong
Published: October 2023

This study analyzes the impact of Korean and foreign economic policy uncertainty on Korean short-term and long-term government bond yield. First of all, the effect of domestic economic policy uncertainty on short-term and long-term government bond yields was analyzed, and then relative policy uncertainty, which was constructed as a ratio of Korean economic policy uncertainty to foreign economic policy uncertainty, was used. Japan, China, and the United States were considered for foreign economic policy uncertainty. In addition, through principal component analysis, Korea's economic policy uncertainty was divided into Korea-specific factors and common factors with Japan, China and USA. The analysis results are as follows. First, Korea's economic policy uncertainty did not have a significant effect on long-term and short-term government bond yields. Second, Korea's unique factor in economic policy uncertainty was found to significantly increase short-term government bond yields. Third, the economic policy uncertainties of Japan, China, and the US have been shown to increase Korea's short-term government bond yields. Fourth, in case of analyzing the effect of relative economic policy uncertainty, Korea's short-term government bond yield rises when Korea's economic policy uncertainty is relatively greater than China's. This implies that the impact of uncertainty on government bond yields can be clearly understood only when economic policy uncertainty is distinguished as a country-specific factor and a common factor.
A Study on the Synchrony of Gross Regional Domestic Product in Busan and Gyeongnam
Authors:   The Korean Data Analysis Society, Jung Sukwan
Published: October 2023

This study examined the synchronicity of economic activities between Busan and Gyeongnam (including Ulsan) using per capita regional gross domestic product data from Busan and Gyeongnam from 1985 to 2020. Synchronization of economic activities is a phenomenon in which major macroeconomic variables move similarly at the same time or over time, and can be analyzed through cointegration analysis and Granger causality analysis. First, we examined whether a long-term equilibrium relationship exists between the regional gross domestic product of Busan and Gyeongnam through a cointegration test considering structural changes. In addition, we examined the mutual predictive power between regional GDP growth rates through the Markov regime-switching model. As a result, a structural change occurred in the long-run stable relationship was found. In the case of the cointegration test method reflecting the structural change, it was found that there is a long-run stable relationship between GRDP of Busan and Gyeongnam. In the Markov phase-switching model, GRDP of the two regions had synchrony in the long run regardless of the economic phase, and there was synchronicity with high mutual predictive power between the rates of change in the GRDP of Busan and Gyeongnam. The synchronicity of economic activities in Busan and Gyeongnam is adequately explained by the method considering the structural change and the nonlinear model.
Revitalization of Seorak Cultural Festival through the Comparative Analysis of Traditional IPA and Vavra's Revised IPA
Authors:   The Korean Data Analysis Society, Kim Young Pyo
Published: October 2023

The purpose of this study was to first identify significant differences between the importance and performance of visitors to the Seorak Cultural Festival, a local cultural festival, and secondly, to suggest ways to revitalize the Seorak Cultural Festival festival program through a modified IPA comparative analysis of traditional IPA and Vavra. Frequency analysis, corresponding sample analysis, and regression analysis were used, and the results derived from the study are summarized as follows. First, there were statistically significant differences in the average value of importance and performance in the opening concert, closing concert, youth Hanmadang, regional representative cultural and artistic performances, family Olympics, receipt events, Seoraksan memory recall mission, and Seorak Cultural Festival certification tour. Second, as a result of analyzing the traditional IPA and the modified Vavra IPA, the traditional IPA included 7 in B-side (including youth Hanmadang), 8 in C-side (including fringe performance), and 3 in D-side (including fringe performance). Meanwhile, the revised IPA analysis results of Vavra, an IPA designed to improve the concentration of traditional IPA, included five I-quadrant, three II-quadrant, seven III-quadrant, and two IV-quadrant among a total of 17 attributes. Third, as a result of the revised IPA comparison analysis between traditional IPA and Vavra, five items (opening concert, street parade, civic song festival, youth culture and arts performance), and three sides, which are non-major elements, were included (Seoraksosa, Sokcho Youth Mall, receipt event, and Seorak Cultural Festival certification tour).
Analysis of Factors Affecting Self-rated Health in Asian Countries
Authors:   The Korean Data Analysis Society, Lee Ga-eul , Byun Byungseol
Published: October 2023

This study utilized self-rated health as a method of reducing the deviation between health index and actual health level in Asia. Using the Human Development Index (HDI) score of the United Nations Development Program (UNDP), countries were grouped into countries with relatively high health (Group A), middle-level countries (Group B), and countries with relatively low levels of health (Group C), Factors affecting subjective health status for each group with similar health levels were analyzed using the logit model. As an independent variable, psychological, political, economic, social, and environmental factors affecting subjective health were derived using World Values Survey (WVS) data, and the dependent variable was subjective health status. Spatial coverage includes Asian countries, including three Northeast Asian countries, China, Japan, and South Korea, and Southeast Asian countries, Bangladesh, Indonesia, Malaysia, Myanmar, Pakistan, Philippines, Thailand, and Vietnam within the scope of the data. The temporal range corresponds to WVS data Wave 7 from 2017 to 2019. As a result of logistic regression analysis, the variables common to the three groups were life satisfaction and happiness among psychological factors, financial condition satisfaction among economic factors, trust in neighbors among social factors, and medical condition among environmental factors. Group A, which has a relatively high level of health, needs to maintain the psychological and economic factors that have an overall influence, and trust in government, trust in neighbors, group activities, and competition, which are relatively low compared to groups B and C. This suggests that it is necessary to prepare policies to improve awareness and satisfaction with life safety variables. Group B, which has a moderate health index, has to deal with health policies in the direction of maintaining the relatively high level of political and social factors compared to groups A and C. Group C, which has a relatively low health index, has an overall impact. There is a need to improve health policies focusing on psychological and environmental factors that are affecting people's health.
Self-esteem model of multicultural school-age children
Authors:   The Korean Data Analysis Society, Kim Meekyung , Park Gongju
Published: October 2023

This study attempted to establish a hypothetical model for self-esteem of multicultural school-age children based on Maslow(1943)'s desire stage theory and to verify the suitability of the model to identify the path and direct and indirect effects of factors affecting self-esteem of multicultural school-age children. Using raw data from the second phase of the 2019 Multicultural Youth Panel Survey (MAPS 2019) of the Korea Youth Policy Institute, a hypothetical model was constructed by synthesizing factors affecting self-esteem of multicultural school-age children, and the relationship between variables was verified. The number of subjects selected as samples in the raw data is 2,246, which satisfies the minimum recommended level for the sample size in the structural equation model. The collected data were analyzed using the SPSS/Win and Amos 22.0 programs. As a result of the study, the self-esteem explanatory power of multicultural school-age children was 22%. Health evaluation in self-esteem (β=.186, p<.001), friend’s support (β=.062, p=.003), social competence (β=.388, p<.001), school life (β=.118, p<.001) had significant direct and total effects. health evaluation (β=.014, p<.001), friend’s support (β=.029, p<.001), social competence (β=.025, p<.001) had a significant indirect effect on self-esteem through school life. health evaluation in school life (β=.121, p<.001), friend’s support (β=.248, p<.001), social competence (β=.213, p<.001) showed significant direct and total effects. Based on the results of this study, we would like to provide basic data for the development of programs that increase self-esteem of school-age multicultural children.
The effects of fall experience, fear of fall, and activity limitations due to fear of fall on frailty
Authors:   The Korean Data Analysis Society, Ji Yoonjung , Baek Wonhee
Published: October 2023

The purpose of this study was to determine the effects of fall experience, fear of fall, and activity limitations due to fear of fall on frailty in older people. This study used national data from the 8th Korean Longitudinal Study of Aging, and frailty index was assessed by 7 divisions and 41 items: self-health assessment, physical condition, mental condition, cognitive ability, activities of daily living, instrumental activities of daily living, and chronic diseases. Stepwise regression analysis was used to identify factors influencing the participants' frailty. The average age of the participants was 76.0 ± 7.4 years. When other factors were adjusted in the final model, age(β= 0.52, p<.001), education level(β= -2.29, p<.001), presence of spouse(β= -0.75, p<.001), social network(β= -1.04, p<.001) was an influential factor in frailty. Compared to individuals without a history of falls, those with a history of falls had a higher frailty(β= 1.47, p< .001). Additionally, individuals with a little fear of fall(β= 2.87, p< .001) or a high level of fear of fall(β= 8.85, p< .001) had higher frailty compared to those with no fear of fall. Furthermore, older people with activity limitation due to fear of fall had higher frailty index scores compared to those without activity limitation(β= 5.14, p< .001). Based on the results of this study, it will be possible to prevent and improve frailty through interventions to prevent falling accidents, reduce fear of fall, and relieve activity limitation due to fear of fall.